CN109000071B - Reinforced thermoplastic plastic composite pipe connecting joint and connecting method thereof - Google Patents
Reinforced thermoplastic plastic composite pipe connecting joint and connecting method thereof Download PDFInfo
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- CN109000071B CN109000071B CN201811018957.3A CN201811018957A CN109000071B CN 109000071 B CN109000071 B CN 109000071B CN 201811018957 A CN201811018957 A CN 201811018957A CN 109000071 B CN109000071 B CN 109000071B
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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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Abstract
The invention relates to the field of pipeline connection of reinforced thermoplastic plastic composite pipes, in particular to a device and a method for connecting fiber reinforced thermoplastic plastic composite pipes; the main structure of the device comprises an RTP pipe, a single-connection flange joint core pipe, a double-connection straight-through joint core pipe, a sleeve, a pressure groove horizontal section, a thread horizontal section, a vertical section, a root circumferential groove, a pressure groove, a pipe section, a connecting section and a middle annular groove; the device also comprises a tube filling machine and a spinning machine which are required for installation; the RTP joint inner core is provided with two arc grooves, and after the joint spinning groove pressing procedure is completed, the RTP pipe, particularly an RTP fiber reinforced layer, is obviously deformed so as to resist the axial force generated when the RTP pipe bears the internal pressure; when the RTP pipe is loaded into the RTP joint inner core, the RTP pipe can be heated by using an external heater, so that the resistance to fiber movement in the fiber reinforced layer is reduced, and the flaring and loading of the RTP pipe are facilitated; the structure is reasonable, and the application is environment-friendly.
Description
The technical field is as follows:
the invention relates to the field of pipeline connection of reinforced thermoplastic plastic composite pipes, in particular to fiber reinforced thermoplastic plastic composite pipe connection equipment and a fiber reinforced thermoplastic plastic composite pipe connection method.
Background art:
a Reinforced thermoplastic composite pipe (RTP) is generally a three-layer structure, in which an inner layer is made of thermoplastic plastics such as HDPE, an intermediate layer is a reinforcing layer made of other reinforcements such as glass fiber, aramid fiber, carbon fiber, and steel wire, and an outer layer is a protective layer made of thermoplastic plastics such as HDPE. RTP combines the advantages of traditional metal pipelines and plastic pipelines, has the remarkable advantages of corrosion resistance, high pressure resistance, good flexibility, capability of coiling and the like, and is widely applied to the field of oil, gas and water transportation at present. The RTP connection technology is one of the core technologies of RTP pipeline systems, and the RTP connection mode restricts the pressure resistance, corrosion resistance and other performances of the RTP pipeline systems.
At present, the connection mode of the RTP pipeline mainly comprises a mechanical compression mode and a non-mechanical compression mode. The non-mechanical compression type connection comprises hot melt connection and electric melting connection, the principle is that plastics are melted and welded together by melting an inner tube or an outer tube (or the inner tube and the outer tube) of RTP plastics to complete pipeline connection and sealing, and the connection mode is only suitable for RTP low-pressure connection. The mechanical pressing connection is that a metal lining pipe is inserted into an RTP pipe, a metal outer sleeve pipe is inserted outside the RTP pipe, and the lining pipe and the outer sleeve pipe are connected through threads, bolts or welding. The outer wall of the metal lining and the inner wall of the metal jacket of the connection mode are provided with radial grooves or one-way sawteeth, the RTP pipe and the connecting piece are matched together through metal plastic deformation, and the grooves or the sawteeth resist axial force through the shearing action of the inner layer plastic and the outer layer plastic of the RTP. Although this connection method can be applied to high voltage connection in RTP, the following problems still exist: firstly, the metal lining pipe is inserted into the RTP pipe, and the flow of a pipeline system is reduced due to the small drift diameter of the joint. Secondly, along with the increase of the pressure bearing capacity of the RTP pipeline, the length of the metal lining pipe which needs to be inserted into the RTP pipeline needs to be correspondingly increased, the difficulty of installing the lining pipe is increased, and the metal lining pipe cannot be suitable for RTP connection of high pressure and ultrahigh pressure.
Therefore, the fiber reinforced thermoplastic plastic composite pipe connecting device and method have good economic and social benefits
The invention content is as follows:
the invention aims to overcome the defects in the prior art, and seeks to design a fiber reinforced thermoplastic composite pipe connecting device and a method, wherein the connection and the sealing of pipelines are realized by arranging a slope chamfer and a pressing groove.
The key technology of main solution is: aiming at the defects of the existing RTP connecting technology, a novel RTP connecting method and equipment are provided to solve the problems that the drift diameter of the RTP pipe joint is reduced and the metal lining pipe is too long in insertion length to be suitable for RTP high-pressure and ultrahigh-pressure connection, and the connecting method and the corresponding equipment are compact in structure, reliable in connection and capable of meeting the requirements of pipeline connection, pipeline connection sealing and pipeline connection strength.
The invention relates to an integral reinforced thermoplastic composite pipe connecting joint, which comprises a main body structure of an RTP pipe, a single-connection flange joint core pipe, a double-connection straight-through joint core pipe, a sleeve, a pressing groove horizontal section, a thread horizontal section, a vertical section, a root annular groove, a pressing groove, a pipe section, a connecting section and a middle annular groove; the left end of the stepped cylindrical single-connection flange joint core pipe is provided with a slope chamfer so as to expand the RTP pipe, the right side of the slope chamfer is a groove pressing horizontal section, 2-4 arc-shaped grooves are arranged on the groove pressing horizontal section, and the slope chamfer and the groove pressing horizontal section are inserted into the RTP pipe; the right side of the horizontal section of the pressure groove is vertically lifted to form a threaded horizontal section, threads are arranged on the threaded horizontal section so as to be connected and fastened with the sleeve, the right side of the threaded horizontal section is vertically lifted to form a vertical section, and a flange is arranged on the vertical section so as to be connected and sealed with an external pipe fitting; the step cylindrical sleeve comprises a pipe section and a connecting section, the pipe section is sleeved into an RTP pipe jacked up by the horizontal section of the pressure groove and tightly buckles the pipe through plastic deformation, and the connecting section is provided with a thread and a thread horizontal section which are fixedly connected.
Further, when the same pipes are connected, the single-connection flange joint core pipe related by the invention is replaced by a double-connection straight-through joint core pipe, the double-connection straight-through joint core pipe is composed of two symmetrical single-connection flange joint core pipes, two vertical sections are directly communicated, and a middle annular groove is formed in a communicated part; the two sleeves are respectively sleeved into the pressure groove horizontal section and the thread horizontal section on the two sides of the doubly-connected straight-through joint core pipe.
The RTP pipe in the integral reinforced thermoplastic composite pipe connecting joint is pushed into the connecting joint through a pipe filling machine, and the main structure of the pipe filling machine comprises the RTP pipe, a support frame, a hydraulic pump, a thrust cylinder, a first mounting plate, a second mounting plate, an RTP mounting clamp, a pipe fixing clamp, a limiting shaft sleeve, a guide sleeve, a first mounting shaft, a clamp rotating shaft, a reinforcing rib, a hydraulic pipe, an RTP joint core pipe and a second mounting shaft; two thrust cylinders are fixed at the left end and the right end of the first mounting plate, a first mounting shaft and a second mounting shaft which are fixed on the first mounting plate are arranged at the inner sides of the two thrust cylinders, reinforcing ribs are arranged on the outer side of the first mounting plate, and support frames are arranged at the two ends of the bottom of the first mounting plate; the ejection end of the propulsion oil cylinder is contacted with the second mounting plate so as to push the second mounting plate to move, and the propulsion oil cylinder is connected with the hydraulic pump through a hydraulic pipe; the second mounting plate is connected with the first mounting shaft and the second mounting shaft in a sliding mode through an upper guide sleeve and a lower guide sleeve, and the two guide sleeves are respectively sleeved on the first mounting shaft and the second mounting shaft so as to provide guidance for the second mounting plate to move in the axial direction and reduce axial resistance; an RTP mounting clamp is arranged on the second mounting plate, the RTP mounting clamp is sleeved on the first mounting shaft and the second mounting shaft and slides back and forth along with the second mounting plate, the lower semicircular part of the RTP mounting clamp is fixed on the second mounting plate, the upper semicircular part of the RTP mounting clamp is rotatably connected with the lower semicircular part of the RTP mounting clamp through a clamp rotating shaft, and the upper semicircular part of the RTP mounting clamp is clamped into the lower semicircular part so as to clamp an RTP joint core pipe to be assembled; the lower semicircular parts of the two pipe fixing clamps are fixed on the first installation shaft and the second installation shaft at intervals, the upper semicircular part of the pipe fixing clamp is rotatably connected with the lower semicircular parts of the pipe fixing clamps through a clamp rotating shaft, the upper semicircular part of the pipe fixing mould is clamped into the lower semicircular parts so as to clamp an RTP pipe to be assembled, the pipe fixing clamp on the left side is fixedly arranged at the end parts of the first installation shaft and the second installation shaft, the parts of the first installation shaft and the second installation shaft between the pipe fixing clamp on the left side and the other pipe fixing clamp on the left side are sleeved with limiting shaft sleeves, the length of each shaft sleeve is equal to the distance between the two pipe fixing clamps, so that the axial movement of the two pipe fixing clamps is limited when the second installation plate moves; the inner surface of the RTP mounting clamp is provided with a convex ring, the RTP joint core pipe is mounted to the lower semicircular part of the RTP mounting clamp, the RTP pipe 1 is inserted into the lower semicircular parts of the two pipe fixing clamps, the rotating clamp rotating shaft covers the RTP mounting clamp, and the convex ring on the RTP mounting clamp is clamped into the vertical section of the RTP joint core pipe; the tip of first installation axle and second installation axle is provided with the support frame, cooperates with the support frame that sets up on the first mounting panel to support whole tube filling machine.
When the pipe filling machine works, the rotating shaft of the rotating clamp covers the RTP installing clamp to fix the RTP joint core pipe, the rotating shaft of the rotating clamp covers the pipe fixing clamp to fix the RTP pipe, the hydraulic pump is started, the pushing oil cylinder pushes the second installing plate to expand the RTP joint core pipe through the slope chamfer, the horizontal section of the pressure groove is inserted into the RTP pipe, and then the sleeve is connected with the horizontal section of the thread through the thread, so that the connection between the pipe and the core pipe is realized.
The main structure of the spinning machine comprises a pipe fixing clamp, an installation base, an installation frame, a main motor, a reduction box, a driven gear, a driving gear fixing frame, an installation large disc, a large disc fixing frame, a spinning wheel, a top wheel fixing frame, a top wheel, a spinning wheel oil cylinder, an RTP joint, an auxiliary motor rotating mechanism, a pipe supporting table, a feeding handle, a ball screw and an RTP pipe; the circular mounting base is fixedly provided with a mounting frame, three large disc fixing frames are fixedly arranged on the mounting frame, driven gears are arranged on the large disc fixing frames, the mounting large disc of the gear structure is meshed with the three driven gears simultaneously, and the three driven gears are uniformly meshed with the mounting large disc at intervals of 120 degrees so as to be convenient for fixedly mounting the large disc in the radial direction of the mounting large disc; a driving gear is arranged right below the mounting large disc, the driving gear is arranged on a driving gear fixing frame, the driving gear fixing frame is fixedly arranged on a mounting base, the driving gear is meshed with the right below the mounting large disc, the driving gear and three driven gears support the mounting large disc, and a driving motor is fixed on the mounting base and is connected with the driving gear through a reduction box; the mounting large disc is respectively and oppositely fixed with a rotary wheel fixing frame and a top wheel fixing frame through bolt connection, the rotary wheel fixing frame is fixedly provided with a rotary wheel towards the circle center end of the mounting large disc, and the other end of the rotary wheel fixing frame is provided with a rotary wheel oil cylinder; the top wheel fixing frame is fixedly provided with a top wheel towards the circle center end of the large mounting disc, the top wheel is formed by horizontally arranging two rolling wheels with the thickness larger than that of the spinning wheel, and the two rolling wheels are matched with the spinning wheel to tightly clamp an RTP joint to be spun; the auxiliary motor rotating mechanism is connected with the rotary wheel oil cylinder, and the auxiliary motor rotating mechanism moves to push out a push rod of the rotary wheel oil cylinder to drive the rotary wheel to move downwards to a pressure groove of the RTP joint; the installation base is fixedly provided with a pipe supporting table, the pipe supporting table is provided with a feeding handle, the feeding handle is connected with a ball screw horizontally arranged, a pipe fixing clamp clamped with an RTP pipe is placed on the pipe supporting table, and the feeding handle is rotated clockwise and anticlockwise to drive the ball screw to move forwards and backwards so as to push the pipe fixing clamp to move.
The invention relates to a main structure of an auxiliary motor rotating mechanism, which comprises a mounting large disc, an auxiliary speed reducer, an auxiliary motor, a PLC (programmable logic controller) control circuit, a storage battery, a crank rocker mechanism, a manual pump and a manual pump pressure lever; the auxiliary speed reducer, the auxiliary motor, the PLC control circuit, the battery is all fixed in one side of installation deep bid, the battery passes through the electric wire and gives the PLC control circuit power supply, the work of PLC control circuit control auxiliary motor, auxiliary motor passes through the speed reducer and is connected with crank rocker mechanism, crank rocker mechanism and manual pump depression bar connection, thereby auxiliary motor work drives the motion of crank rocker mechanism and drives manual pump pressure bar and lift and push down, thereby manual pump work is released the push rod of spinning wheel hydro-cylinder, realize the action of pushing down of spinning wheel.
When the spinning machine is used, the installed RTP connector is placed on the spinning machine, and the RTP connector is pushed to a preset position by rotating the feeding handle, namely a pressing groove on the RTP connector is positioned right below the spinning wheel; the PLC control circuit starts the auxiliary motor to work to drive the crank tobacco rod mechanism to move so as to drive the manual pump pressure rod to lift and press down, so that the manual pump works to discharge oil to push out the push rod of the rotary wheel oil cylinder, the rotary wheel is pressed into the pressing groove of the RTP connector, the main motor is started to drive the mounting large disc to rotate, the rotary wheel is driven to rotate around the RTP connector to spin, and the sleeve is spun into the pressing groove.
The invention provides an installation method of an integral RTP connecting joint, which mainly comprises the following steps:
(1) sleeving a sleeve: firstly, sleeving a sleeve of an integral RTP joint into an RTP pipe;
(2) fixing the RTP pipe: the RTP pipe passes through two pipe fixing clamps, then a pipe fixing mold is arranged in the pipe fixing clamps, the pipe fixing clamps are covered and screwed tightly by screws;
(3) fixing an RTP inner core tube: placing an RTP single-connection flange joint inner core pipe in an RTP mounting fixture, connecting an RTP mounting mold with the RTP mounting fixture, covering the RTP mounting fixture, and screwing down the RTP mounting fixture by using screws;
(4) tube loading: starting a hydraulic pump of the pipe filling machine, enabling the two oil cylinders to work, pushing out a push rod, pushing the second mounting plate to move left, and filling an inner core pipe of the RTP single-connection flange joint into an RTP pipe;
(5) installing an RTP joint sleeve: installing a pre-installed RTP pipe sleeve to a threaded horizontal section of an inner core pipe of an RTP single-connection flange joint through threads to finish the installation work of an integral RTP connecting joint;
(6) fixing a spinning machine: fixing the tube with the integral RTP connecting joint finished in the step (5) on a spinning machine, and then rotating a feeding handle to push the joint to a specified position;
(7) groove rotating: starting a main motor of the spinning machine, rotating the mounting large disc, and rotating a spinning wheel of the spinning machine along with the mounting large disc; and then starting the auxiliary motor, rotating the auxiliary motor, starting a manual hydraulic pump fixed on the mounting large disc to work, outputting hydraulic oil, ejecting a push rod of a rotary wheel oil cylinder, moving the rotary wheel to a preset position of the pressure groove, rotating the groove, then propelling the joint again, and repeating the steps to finish the spinning of the second pressure groove, namely finishing the mounting connection of the whole integral RTP joint.
When the RTP inner core pipe is a double-connection straight-through joint core pipe, in the pipe installing step, the RTP pipe at one end needs to be installed first, and then the RTP pipe is turned 180 degrees to complete pipe installation at the other end; in the rotary grooving step, after the rotary grooving at one end of the joint is finished, the rotary grooving at the other end of the joint is finished by turning 180 degrees again.
The invention relates to an integral reinforced thermoplastic composite pipe connecting joint, wherein a sleeve is a half sleeve, and the main structure of the integral reinforced thermoplastic composite pipe connecting joint comprises an upper half, a lower half, a connecting key, a pressing rib, an arc groove section, a connecting block and a bolt hole; the half casing pipe is formed by buckling two identical semicircular arch bridge-shaped pipe pieces, and the two connecting keys are correspondingly arranged on one sides of the two pipe pieces so as to be inserted into the root circumferential groove of the horizontal section of the pressing groove to complete the positioning of the half casing pipe and the joint core pipe; two arc groove sections are arranged on the left side and the right side of each pipe piece so as to increase friction force to compress the RTP pipe; two raised pressing ribs are arranged in the middle of each pipe piece, so that the pipe pieces are folded to tightly press two pressing grooves of the horizontal section of the core pipe pressing groove; the semicircle of the pipe piece extends to form a connecting block, and a bolt hole is formed in the connecting block so that the pipe piece can be fixed by a bolt after being folded.
When the Harvard type sleeve is used, the pressing ribs are aligned to the pressing grooves of the horizontal section of the pressing grooves, and the pressing grooves are folded and screwed, so that connection can be completed.
The invention relates to a method for installing a connecting joint of a Harvard type reinforced thermoplastic plastic composite pipe, which mainly comprises the following steps:
(1) fixing the RTP pipe: the RTP pipe passes through two pipe fixing clamps, then a pipe fixing mold is arranged in the pipe fixing clamps, the pipe fixing clamps are covered and screwed tightly by screws;
(2) fixing an RTP inner core tube: placing an RTP single-connection flange joint inner core pipe in an RTP mounting fixture, connecting an RTP mounting mold with the RTP mounting fixture, covering the RTP mounting fixture, and screwing down the RTP mounting fixture by using screws;
(3) tube loading: starting a hydraulic pump of the pipe filling machine, enabling the two oil cylinders to work, pushing out a push rod, pushing the second mounting plate to move left, and filling an inner core pipe of the RTP single-connection flange joint into an RTP pipe;
(4) installing a sleeve: inserting the connecting keys of the half type sleeves into the root annular groove of the horizontal section of the core pipe pressing groove of the RTP single-connection flange joint, and tightly attaching the upper half-half-half-half-.
When the double-connection straight-through joint core pipe is sleeved, two half type sleeves are sleeved on two sides of the double-connection straight-through joint core pipe.
The RTP connection method and the equipment related by the invention have the working principle that: the inner core of the RTP joint is provided with a chamfer slope, so that flaring insertion of an RTP pipe is facilitated; the inner diameter of an inner core of the RTP joint is equal to the inner diameter of an RTP pipe, and the flow path of the RTP pipeline system is not reduced by the joint; the RTP joint inner core is provided with two arc grooves, and after the joint spinning groove pressing procedure is completed, the RTP pipe, particularly an RTP fiber reinforced layer, is obviously deformed so as to resist the axial force generated when the RTP pipe bears the internal pressure; when the RTP pipe is loaded into the RTP joint inner core, the RTP pipe can be heated by using an external heater, so that the resistance to fiber movement in the fiber reinforced layer is reduced, and the flaring and loading of the RTP pipe are facilitated; the integral RTP of A type connects the quill to take place obvious plastic deformation under the pressure of spinning-lathe spinning wheel, B type Harvard formula RTP connects the quill to compress tightly under the fastening of bolt through its two channels of bellied beads inwards, and two kinds of types of casings are all accomplished and are oppressed the RTP tubular product and get into the recess of RTP joint inner core department that sets up in advance, accomplish the connection and the sealing of RTP joint, guarantee the intensity and the reliability of joint.
Description of the drawings:
FIG. 1 is a schematic view of a single-flange joint structure according to the present invention
FIG. 2 is a schematic view of a spiral groove rear single-connection flange joint structure according to the present invention
FIG. 3 is a schematic view of a dual-connection through connector structure according to the present invention
FIG. 4 is a schematic view of a spiral groove rear double-connection through joint structure according to the present invention
FIG. 5 is a schematic view of a Harvard type casing structure according to the present invention
FIG. 6 is a schematic view of the assembly of a half-shell pipe according to the present invention
FIG. 7 is a schematic view of the principle of the main structure of the tube filling machine related to the present invention
FIG. 8 is a schematic view of the principle of the main structure of the spinning machine related to the present invention
FIG. 9 is a schematic view of a secondary motor rotating mechanism of a spinning machine according to the present invention
FIG. 10 is a schematic view of a spinning machine tube support table according to the present invention
The specific implementation mode is as follows:
the invention is further illustrated by the following examples in conjunction with the accompanying drawings.
Example 1:
the main structure of the integral reinforced thermoplastic composite pipe connecting joint comprises an RTP pipe 1, a single-connection flange joint core pipe 2, a double-connection straight-through joint core pipe 3, a sleeve 4, a groove pressing horizontal section 5, a thread horizontal section 6, a vertical section 7, a root circumferential groove 8, a groove pressing 9, a pipe section 10, a connecting section 11 and a middle circumferential groove 12; the left end of the stepped cylindrical single-connection flange joint core pipe 2 is provided with a slope chamfer so as to expand the RTP pipe 1, the right side of the slope chamfer is a groove pressing horizontal section 5, 2-4 arc-shaped pressing grooves 9 are arranged on the groove pressing horizontal section 5, and the slope chamfer and the groove pressing horizontal section 5 are inserted into the RTP pipe 1 so as to be connected with the groove pressing 9 of the pipe; the right side of the horizontal section 5 of the pressure groove is vertically lifted to form a threaded horizontal section 6, threads (not shown in the attached drawing) are arranged on the threaded horizontal section 6 so as to be connected and fastened with the sleeve 4, the right side of the threaded horizontal section 6 is vertically lifted to form a vertical section 7, and a flange is arranged on the vertical section 7 so as to be connected and sealed with an external pipe fitting; the step cylindrical sleeve 4 comprises a pipe section 10 and a connecting section 11, the pipe section 10 is sleeved into the RTP pipe 1 jacked up by the pressure groove horizontal section 5 and tightly buckles the pipe through plastic deformation, and the connecting section 11 is provided with threads and a thread horizontal section 6 which are fixedly connected.
Further, when the same pipes are connected, the single-connection flange joint core pipe 2 related to the embodiment is replaced by a double-connection straight-through joint core pipe 3, the double-connection straight-through joint core pipe 3 is composed of two symmetrical single-connection flange joint core pipes 2, two vertical sections 7 are directly communicated, and a middle annular groove 12 is formed in the communicated part; the two sleeves 4 are respectively sleeved into the pressing groove horizontal section 5 and the thread horizontal section 6 on the two sides of the doubly-connected straight-through joint core pipe 3.
The RTP pipe 1 in the integral reinforced thermoplastic composite pipe connecting joint related to the embodiment is pushed into the connecting joint through a pipe loading machine, and the main structure of the pipe loading machine comprises the RTP pipe 1, a support frame 13, a hydraulic pump 14, a thrust cylinder 15, a first mounting plate 16, a second mounting plate 17, an RTP mounting fixture 18, a pipe fixing fixture 19, a limiting shaft sleeve 20, a guide sleeve 21, a first mounting shaft 22, a fixture rotating shaft 23, a reinforcing rib 24, a hydraulic pipe 25, an RTP joint core pipe 27 and a second mounting shaft 28; two propulsion cylinders 15 are fixed at the left end and the right end of the first mounting plate 16, a first mounting shaft 22 and a second mounting shaft 28 which are fixed on the first mounting plate 16 are arranged at the inner sides of the two propulsion cylinders 15, a reinforcing rib 24 is arranged at the outer side of the first mounting plate 16, and support frames 13 are arranged at the two ends of the bottom of the first mounting plate 16; the ejection end of the propulsion oil cylinder 15 contacts the second mounting plate 17 so as to push the second mounting plate 17 to move, and the propulsion oil cylinder 15 is connected with the hydraulic pump 14 through a hydraulic pipe 25; the second mounting plate 17 is slidably connected with the first mounting shaft 22 and the second mounting shaft 28 through an upper guide sleeve 21 and a lower guide sleeve 21, and the two guide sleeves 21 are respectively sleeved on the first mounting shaft 22 and the second mounting shaft 28 so as to provide guidance for the axial movement of the second mounting plate 17 and reduce the axial resistance; an RTP mounting clamp 18 is arranged on the second mounting plate 17, the RTP mounting clamp 18 is sleeved on the first mounting shaft 22 and the second mounting shaft 28 and slides back and forth along with the second mounting plate 17, the lower semicircular part of the RTP mounting clamp 18 is fixed on the second mounting plate 17, the upper semicircular part of the RTP mounting clamp 18 is rotatably connected with the lower semicircular part of the RTP mounting clamp 18 through a clamp rotating shaft 23, and the upper semicircular part of the RTP mounting clamp 18 is clamped into the lower semicircular part so as to clamp an RTP joint core pipe 27 to be assembled; the lower semicircular parts of the two pipe fixing clamps 19 are fixed on the first mounting shaft 22 and the second mounting shaft 28 at intervals, the upper semicircular part of the pipe fixing clamp 19 is rotatably connected with the lower semicircular part of the pipe fixing clamp 19 through a clamp rotating shaft 23, the upper semicircular part of the pipe fixing mold is clamped into the lower semicircular part so as to clamp the RTP pipe 1 to be assembled, the pipe fixing clamp 19 on the left side is fixedly arranged at the end parts of the first mounting shaft 22 and the second mounting shaft 28, the parts of the first mounting shaft 22 and the second mounting shaft 28 between the pipe fixing clamp 19 on the left side and the other pipe fixing clamp 19 are sleeved with a limiting shaft sleeve 20, the length of the shaft sleeve is equal to the distance between the two pipe fixing clamps 19, so that the axial movement of the two pipe fixing clamps 19 is limited when the second mounting plate 17 moves; the inner surface of the RTP mounting clamp 18 is provided with a convex ring, the RTP joint core tube 27 is mounted on the lower semicircular part of the RTP mounting clamp 18, the RTP pipe 1 is inserted into the lower semicircular parts of the two pipe fixing clamps 19, the rotating clamp rotating shaft 23 covers the RTP mounting clamp 18, and the convex ring on the RTP mounting clamp 18 is clamped into the vertical section 7 of the RTP joint core tube 27; the ends of the first mounting shaft 22 and the second mounting shaft 28 are provided with support brackets 13 that cooperate with the support brackets 13 provided on the first mounting plate 16 to support the entire tube filling machine.
When the pipe loading machine related to the embodiment works, the rotating clamp rotating shaft 23 covers the RTP installing clamp 18 to fix the RTP joint core pipe 27, the rotating clamp rotating shaft 23 covers the pipe fixing clamp 19 to fix the RTP pipe 1, the hydraulic pump 14 is started, the thrust cylinder 15 pushes the second installing plate 17 to enable the RTP joint core pipe 27 to pass through slope chamfer flaring, the groove pressing horizontal section 5 is inserted into the RTP pipe 1, then the sleeve 4 is connected with the thread horizontal section 6 through threads, and connection of the pipe and the core pipe is achieved.
The main structure of the spinning machine related to the embodiment comprises a pipe fixing clamp 19, an installation base 29, an installation frame 30, a main motor 31, a reduction box 32, a driven gear 33, a driving gear 34, a driving gear fixing frame 35, an installation large disc 36, a large disc fixing frame 37, a spinning wheel fixing frame 38, a spinning wheel 39, a top wheel fixing frame 40, a top wheel 41, a spinning wheel oil cylinder 42, an RTP joint 43, an auxiliary motor rotating mechanism 44, a pipe supporting table 45, a feeding handle 46, a ball screw 47 and an RTP pipe 1; the annular mounting base 29 is fixedly provided with a mounting frame 30, the mounting frame 30 is fixedly provided with three large disc fixing frames 37, the large disc fixing frames 37 are provided with driven gears 33, the mounting large disc 36 of the gear structure is meshed with the three driven gears 33 simultaneously, and the three driven gears 33 are uniformly meshed with the mounting large disc 36 at intervals of 120 degrees so as to fixedly mount the large disc 36 in the radial direction of the mounting large disc 36; a driving gear 34 is arranged right below the mounting large disc 36, the driving gear 34 is arranged on a driving gear fixing frame 35, the driving gear fixing frame 35 is fixedly arranged on the mounting base 29, the driving gear 34 is meshed with the right below the mounting large disc 36, the driving gear 34 and three driven gears 33 support the mounting large disc 36, and a driving motor is fixed on the mounting base 29 and is connected with the driving gear 34 through a reduction gearbox 32; a rotary wheel fixing frame 38 and a top wheel fixing frame 40 are respectively fixed on the large mounting disc 36 in an opposite direction through bolt connection, a rotary wheel 39 is fixedly arranged on the rotary wheel fixing frame 38 towards the circle center end of the large mounting disc 36, and a rotary wheel oil cylinder 42 is arranged on the other end; a top wheel 41 is fixedly arranged on the top wheel fixing frame 40 towards the circle center of the large mounting disc 36, the top wheel 41 is formed by horizontally arranging two rollers with the thickness larger than that of the spinning wheel 39, and the rollers are matched with the spinning wheel 39 to tightly clamp an RTP joint 43 to be spun; the auxiliary motor rotating mechanism 44 is connected with the rotary wheel oil cylinder 42, and the auxiliary motor rotating mechanism 44 moves to push out the push rod of the rotary wheel oil cylinder 42 and drive the rotary wheel 39 to move downwards to the pressure groove 9 of the RTP joint; the mounting base 29 is fixedly provided with a pipe supporting platform 45, the pipe supporting platform 45 is provided with a feeding handle 46, the feeding handle 46 is connected with a ball screw 47 horizontally arranged, a pipe fixing clamp 19 clamped with an RTP pipe 1 is placed on the pipe supporting platform 45, and the feeding handle 46 is rotated clockwise and anticlockwise to drive the ball screw 47 to move forwards and backwards, so that the pipe fixing clamp 19 is pushed to move.
The main structure of the auxiliary motor rotating mechanism 44 related by the invention comprises a mounting large disc 36, an auxiliary speed reducer 441, an auxiliary motor 442, a PLC control circuit 443, a storage battery 444, a crank rocker mechanism 445, a manual pump 446, a manual pump pressure lever 447 and a transmission shaft 448; the auxiliary speed reducer 441, the auxiliary motor 442, the PLC control circuit 443 and the storage battery 444 are all fixed on one side of the mounting large disc 36, the storage battery 444 supplies power to the PLC control circuit 443 through electric wires, the PLC control circuit 443 controls the auxiliary motor 442 to work, the auxiliary motor 442 is connected with the crank rocker mechanism 445 through the speed reducer 441 and the transmission shaft 448, the crank rocker mechanism 445 is connected with the manual pump pressing rod 447, the auxiliary motor 442 works to drive the crank rocker mechanism 445 to move so as to drive the manual pump pressing rod 447 to lift and press down, and therefore the manual pump 446 works to push out the push rod of the rotary wheel oil cylinder 42 and achieve the pressing-down action of the rotary wheel 39.
When the spinning machine related to the embodiment is used, the installed RTP connector is placed on the spinning machine, and the RTP connector is pushed to a preset position by rotating the feeding handle 46, namely the pressing groove 9 on the RTP connector is positioned right below the spinning wheel 39; the PLC control circuit starts the auxiliary motor to work, drives the crank rocker 445 rod mechanism to move so as to drive the manual pump pressure rod to lift and press down, so that the manual pump 446 pushes out the push rod of the spinning wheel oil cylinder 42 when working to discharge oil, presses the spinning wheel 39 into the pressing groove 9 of the RTP connector, starts the main motor 31 to drive the mounting large disc 36 to rotate, drives the spinning wheel 39 to rotate around the RTP connector for spinning, and spins the sleeve 4 into the pressing groove 9.
The embodiment provides an installation method of an integral RTP connecting joint, which mainly comprises the following steps:
(1) sleeving the sleeve 4: firstly, sleeving a sleeve 4 of an integral RTP joint into an RTP pipe 1;
(2) fixing the RTP pipe 1: the RTP pipe 1 passes through two pipe fixing clamps 19, then a pipe fixing mold is arranged in the pipe fixing clamps 19, the pipe fixing clamps 19 are covered and screwed tightly by screws;
(3) fixing an RTP inner core tube: placing an inner core tube of the RTP single-connection flange joint in an RTP mounting clamp 18, connecting an RTP mounting mould with the RTP mounting clamp 18, covering the RTP mounting clamp 18, and screwing down by using screws;
(4) tube loading: starting a hydraulic pump 14 of the pipe filling machine, enabling the two oil cylinders to work, pushing out a push rod, pushing the second mounting plate 17 to move left, and filling an inner core pipe of the RTP single-connection flange joint into the RTP pipe 1;
(5) installing an RTP joint sleeve: installing a sleeve 4 which is pre-installed in an RTP pipe 1 to a threaded horizontal section 6 of an inner core pipe of an RTP single-connection flange joint through threads to finish the installation work of an integral RTP connection joint;
(6) fixing a spinning machine: fixing the tube with the integral RTP connecting joint finished in the step (5) on a spinning machine, and then rotating a feeding handle 46 to push the joint to a specified position;
(7) groove rotating: starting the main motor 31 of the spinning machine, rotating the mounting large disc 36, and rotating the spinning wheel 39 of the spinning machine along with the mounting large disc 36; and then starting the auxiliary motor, rotating the auxiliary motor, starting the manual hydraulic pump 14 fixed on the mounting large disc 36 to work, outputting hydraulic oil, ejecting a push rod of the rotary wheel cylinder 42, descending the rotary wheel 39 to a preset position of the pressure groove 9, rotating the groove, then pushing the joint again, and repeating the steps to finish the spinning of the second pressure groove 9, namely finishing the mounting connection of the whole integral RTP connection joint.
In the installation method of the integral RTP connecting joint related by the embodiment, when the RTP inner core tube is the double-connection straight-through joint core tube 3, in the tube installation step, the RTP tube 1 at one end needs to be installed first, and then the tube installation at the other end is completed by turning 180 degrees; in the rotary grooving step, after the rotary grooving at one end of the joint is finished, the rotary grooving at the other end of the joint is finished by turning 180 degrees again.
Example 2:
in the integral reinforced thermoplastic composite pipe connecting joint related to the embodiment, the sleeve 4 is a half sleeve, and the main structure of the sleeve comprises an upper half 101, a lower half 102, a connecting key 103, a pressing rib 104, an arc groove section 105, a connecting block 106 and a bolt hole 107; the half casing is formed by buckling two identical semicircular arch bridge-shaped pipe pieces, and the two connecting keys 103 are correspondingly arranged on one sides of the two pipe pieces so as to be inserted into the root circumferential groove 8 on the groove pressing horizontal section 5 to complete the positioning of the half casing and the joint core pipe; two arc groove sections 105 are arranged on the left side and the right side of each pipe piece so as to increase friction force to compress the RTP pipe 1; two raised pressing ribs 104 are arranged in the middle of each pipe piece so that the pipe pieces are folded to tightly press the two pressing grooves 9 of the core pipe pressing groove horizontal section 5; the semicircular pipe piece extends to form a connecting block 106, and a bolt hole 107 is formed in the connecting block 106 so that the pipe piece can be fixed through a bolt after being folded.
When the Harvard type sleeve is used, the pressing rib is aligned with the pressing groove 9 of the pressing groove horizontal section 5, and the pressing groove is closed and screwed, so that connection can be completed.
The invention relates to a method for installing a connecting joint of a Harvard integral reinforced thermoplastic composite pipe, which mainly comprises the following steps:
(1) fixing the RTP pipe 1: the RTP pipe 1 passes through two pipe fixing clamps 19, then a pipe fixing mold is arranged in the pipe fixing clamps 19, the pipe fixing clamps 19 are covered and screwed tightly by screws;
(2) fixing an RTP inner core tube: placing an inner core tube of the RTP single-connection flange joint in an RTP mounting clamp 18, connecting an RTP mounting mould with the RTP mounting clamp 18, covering the RTP mounting clamp 18, and screwing down by using screws;
(3) tube loading: starting a hydraulic pump 14 of the pipe filling machine, enabling the two oil cylinders to work, pushing out a push rod, pushing the second mounting plate 17 to move left, and filling an inner core pipe of the RTP single-connection flange joint into the RTP pipe 1;
(4) installing a sleeve: inserting a connecting key of the half type sleeve into a root annular groove 8 of the core pipe pressing groove horizontal section 5 of the RTP single-connection flange joint, and tightly attaching the upper half-half-half.
When the double-connection straight-through joint core pipe 3 is sleeved, two harbour type sleeves are sleeved on two sides of the double-connection straight-through joint core pipe simultaneously.
Claims (5)
1. A kind of integral type strengthens the thermoplastic plastic composite pipe union coupling, the body structure includes RTP tubular material, single flange joint core pipe, double straight-through joint core pipe, quill, horizontal section of pressing groove, threaded horizontal section, vertical section, root circumferential groove, pressing groove, tubular material section, linkage segment, middle ring channel; the left end of the stepped cylindrical single-connection flange joint core pipe is provided with a slope chamfer so as to expand the RTP pipe, the right side of the slope chamfer is a groove pressing horizontal section, 2-4 arc-shaped grooves are arranged on the groove pressing horizontal section, and the slope chamfer and the groove pressing horizontal section are inserted into the RTP pipe; the right side of the horizontal section of the pressure groove is vertically lifted to form a threaded horizontal section, threads are arranged on the threaded horizontal section so as to be connected and fastened with the sleeve, the right side of the threaded horizontal section is vertically lifted to form a vertical section, and a flange is arranged on the vertical section so as to be connected and sealed with an external pipe fitting; the stepped cylindrical sleeve comprises a pipe section and a connecting section, the pipe section is sleeved into an RTP pipe jacked up by the horizontal section of the pressure groove and tightly buckles the pipe through plastic deformation, and the connecting section is provided with threads which are fixedly connected with the threaded horizontal section; the single-connection flange joint core pipe is replaced by a double-connection straight-through joint core pipe, the double-connection straight-through joint core pipe is composed of two symmetrical single-connection flange joint core pipes, two vertical sections are directly communicated, and a communication part forms a middle annular groove; the two sleeves are respectively sleeved into the horizontal sections of the pressing grooves and the horizontal sections of the threads on the two sides of the core pipe of the double-connection straight-through joint; the device is characterized in that the RTP pipe is pushed into a connecting joint through a pipe filling machine, and the main structure of the pipe filling machine comprises the RTP pipe, a support frame, a hydraulic pump, a pushing oil cylinder, a first mounting plate, a second mounting plate, an RTP mounting clamp, a pipe fixing clamp, a limiting shaft sleeve, a guide sleeve, a first mounting shaft, a clamp rotating shaft, a reinforcing rib, a hydraulic pipe, an RTP joint core pipe and a second mounting shaft; two thrust cylinders are fixed at the left end and the right end of the first mounting plate, a first mounting shaft and a second mounting shaft which are fixed on the first mounting plate are arranged at the inner sides of the two thrust cylinders, reinforcing ribs are arranged on the outer side of the first mounting plate, and support frames are arranged at the two ends of the bottom of the first mounting plate; the ejection end of the propulsion oil cylinder is contacted with the second mounting plate so as to push the second mounting plate to move, and the propulsion oil cylinder is connected with the hydraulic pump through a hydraulic pipe; the second mounting plate is connected with the first mounting shaft and the second mounting shaft in a sliding mode through an upper guide sleeve and a lower guide sleeve, and the two guide sleeves are respectively sleeved on the first mounting shaft and the second mounting shaft so as to provide guidance for the second mounting plate to move in the axial direction and reduce axial resistance; an RTP mounting clamp is arranged on the second mounting plate, the RTP mounting clamp is sleeved on the first mounting shaft and the second mounting shaft and slides back and forth along with the second mounting plate, the lower semicircular part of the RTP mounting clamp is fixed on the second mounting plate, the upper semicircular part of the RTP mounting clamp is rotatably connected with the lower semicircular part of the RTP mounting clamp through a clamp rotating shaft, and the upper semicircular part of the RTP mounting clamp is clamped into the lower semicircular part so as to clamp an RTP joint core pipe to be assembled; the lower semicircular parts of the two pipe fixing clamps are fixed on the first installation shaft and the second installation shaft at intervals, the upper semicircular part of the pipe fixing clamp is rotatably connected with the lower semicircular parts of the pipe fixing clamps through a clamp rotating shaft, the upper semicircular part of the pipe fixing mould is clamped into the lower semicircular parts so as to clamp an RTP pipe to be assembled, the pipe fixing clamp on the left side is fixedly arranged at the end parts of the first installation shaft and the second installation shaft, the parts of the first installation shaft and the second installation shaft between the pipe fixing clamp on the left side and the other pipe fixing clamp on the left side are sleeved with limiting shaft sleeves, the length of each shaft sleeve is equal to the distance between the two pipe fixing clamps, so that the axial movement of the two pipe fixing clamps is limited when the second installation plate moves; the inner surface of the RTP mounting clamp is provided with a convex ring, the RTP joint core pipe is mounted to the lower semicircular part of the RTP mounting clamp, the RTP pipe 1 is inserted into the lower semicircular parts of the two pipe fixing clamps, the rotating clamp rotating shaft covers the RTP mounting clamp, and the convex ring on the RTP mounting clamp is clamped into the vertical section of the RTP joint core pipe; the tip of first installation axle and second installation axle is provided with the support frame, cooperates with the support frame that sets up on the first mounting panel to support whole tube filling machine.
2. The integral reinforced thermoplastic composite pipe joint according to claim 1, wherein the RTP pipe is a screw groove formed in a spinning machine, and the main structure of the spinning machine comprises a pipe fixing clamp, a mounting base, a mounting frame, a main motor, a reduction box, a driven gear, a driving gear fixing frame, a mounting large disc, a large disc fixing frame, a spinning wheel, a top wheel fixing frame, a top wheel, a spinning wheel cylinder, an RTP joint, an auxiliary motor rotating mechanism, a pipe supporting table, a feeding handle, a ball screw and an RTP pipe; the circular mounting base is fixedly provided with a mounting frame, three large disc fixing frames are fixedly arranged on the mounting frame, driven gears are arranged on the large disc fixing frames, the mounting large disc of the gear structure is meshed with the three driven gears simultaneously, and the three driven gears are uniformly meshed with the mounting large disc at intervals of 120 degrees so as to be convenient for fixedly mounting the large disc in the radial direction of the mounting large disc; a driving gear is arranged right below the mounting large disc, the driving gear is arranged on a driving gear fixing frame, the driving gear fixing frame is fixedly arranged on a mounting base, the driving gear is meshed with the right below the mounting large disc, the driving gear and three driven gears support the mounting large disc, and a driving motor is fixed on the mounting base and is connected with the driving gear through a reduction box; the mounting large disc is respectively and oppositely fixed with a rotary wheel fixing frame and a top wheel fixing frame through bolt connection, the rotary wheel fixing frame is fixedly provided with a rotary wheel towards the circle center end of the mounting large disc, and the other end of the rotary wheel fixing frame is provided with a rotary wheel oil cylinder; the top wheel fixing frame is fixedly provided with a top wheel towards the circle center end of the large mounting disc, the top wheel is formed by horizontally arranging two rolling wheels with the thickness larger than that of the spinning wheel, and the two rolling wheels are matched with the spinning wheel to tightly clamp an RTP joint to be spun; the auxiliary motor rotating mechanism is connected with the rotary wheel oil cylinder, and the auxiliary motor rotating mechanism moves to push out a push rod of the rotary wheel oil cylinder to drive the rotary wheel to move downwards to a pressure groove of the RTP joint; the installation base is fixedly provided with a pipe supporting table, the pipe supporting table is provided with a feeding handle, the feeding handle is connected with a ball screw horizontally arranged, a pipe fixing clamp clamped with an RTP pipe is placed on the pipe supporting table, and the feeding handle is rotated clockwise and anticlockwise to drive the ball screw to move forwards and backwards so as to push the pipe fixing clamp to move.
3. The integral reinforced thermoplastic composite pipe connecting joint as claimed in claim 2, wherein the main structure of the secondary motor rotating mechanism comprises a mounting large disc, a secondary speed reducer, a secondary motor, a PLC control circuit, a storage battery, a crank and rocker mechanism, a manual pump and a manual pump pressure lever; the auxiliary speed reducer, the auxiliary motor, the PLC control circuit, the battery is all fixed in one side of installation deep bid, the battery passes through the electric wire and gives the PLC control circuit power supply, the work of PLC control circuit control auxiliary motor, auxiliary motor passes through the speed reducer and is connected with crank rocker mechanism, crank rocker mechanism and manual pump depression bar connection, thereby auxiliary motor work drives the motion of crank rocker mechanism and drives manual pump pressure bar and lift and push down, thereby manual pump work is released the push rod of spinning wheel hydro-cylinder, realize the action of pushing down of spinning wheel.
4. The integral reinforced thermoplastic composite pipe joint according to claim 1, wherein the method for installing the integral reinforced thermoplastic composite pipe joint comprises the following main steps:
(1) sleeving a sleeve: firstly, sleeving a sleeve of an integral RTP joint into an RTP pipe;
(2) fixing the RTP pipe: the RTP pipe passes through two pipe fixing clamps, then a pipe fixing mold is arranged in the pipe fixing clamps, the pipe fixing clamps are covered and screwed tightly by screws;
(3) fixing an RTP inner core tube: placing an RTP single-connection flange joint inner core pipe in an RTP mounting fixture, connecting an RTP mounting mold with the RTP mounting fixture, covering the RTP mounting fixture, and screwing down the RTP mounting fixture by using screws;
(4) tube loading: starting a hydraulic pump of the pipe filling machine, enabling the two oil cylinders to work, pushing out a push rod, pushing the second mounting plate to move left, and filling an inner core pipe of the RTP single-connection flange joint into an RTP pipe;
(5) installing an RTP joint sleeve: installing a pre-installed RTP pipe sleeve to a threaded horizontal section of an inner core pipe of an RTP single-connection flange joint through threads to finish the installation work of an integral RTP connecting joint;
(6) fixing a spinning machine: fixing the tube with the integral RTP connecting joint finished in the step (5) on a spinning machine, and then rotating a feeding handle to push the joint to a specified position;
(7) groove rotating: starting a main motor of the spinning machine, rotating the mounting large disc, and rotating a spinning wheel of the spinning machine along with the mounting large disc; and then starting the auxiliary motor, rotating the auxiliary motor, starting a manual hydraulic pump fixed on the mounting large disc to work, outputting hydraulic oil, ejecting a push rod of a rotary wheel oil cylinder, moving the rotary wheel to a preset position of the pressure groove, rotating the groove, then propelling the joint again, and repeating the steps to finish the spinning of the second pressure groove, namely finishing the mounting connection of the whole integral RTP joint.
5. The integral reinforced thermoplastic composite pipe connecting joint as recited in claim 4, wherein in the step of the installation method, when the RTP inner core pipe is a double-connection straight-through joint core pipe, in the step (4) of pipe loading, the RTP pipe at one end needs to be loaded first, and then the RTP inner core pipe is turned 180 degrees to complete the pipe loading at the other end; in the step (7), after the rotary groove at one end of the joint is completed, the rotary groove at the other end of the joint is turned for 180 degrees again to complete the rotary groove at the other end of the joint.
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| CN201811018957.3A CN109000071B (en) | 2018-09-03 | 2018-09-03 | Reinforced thermoplastic plastic composite pipe connecting joint and connecting method thereof |
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| CN201811018957.3A CN109000071B (en) | 2018-09-03 | 2018-09-03 | Reinforced thermoplastic plastic composite pipe connecting joint and connecting method thereof |
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| CN109000071B true CN109000071B (en) | 2020-06-16 |
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| CN112091044B (en) * | 2020-09-08 | 2022-04-08 | 江苏青阳管业有限公司 | Spinning processing composite device for bimetal composite pipe and use method thereof |
| CN118595317B (en) * | 2024-08-08 | 2024-11-22 | 江苏正道海洋科技股份有限公司 | Buckling and forming equipment for connecting flexible composite pipe joint and using method thereof |
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| BR0009059A (en) * | 1999-03-17 | 2002-04-09 | Lattice Intellectual Property | Reinforced thermoplastic tube joint for high pressure conveying applications |
| CN202674670U (en) * | 2012-05-22 | 2013-01-16 | 南京晨光欧佩亚复合管工程有限公司 | RTP (reinforced thermoplastic pipe) joint |
| CN203099188U (en) * | 2012-12-30 | 2013-07-31 | 广州励进新技术有限公司 | Rein-forced thermoplastic pipe (RTP) anti-corrosion pressure connection pipe fitting |
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| CN206036491U (en) * | 2016-08-17 | 2017-03-22 | 航天晨光（福建）管业科技有限公司 | RTP coupling |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR0009059A (en) * | 1999-03-17 | 2002-04-09 | Lattice Intellectual Property | Reinforced thermoplastic tube joint for high pressure conveying applications |
| CN202674670U (en) * | 2012-05-22 | 2013-01-16 | 南京晨光欧佩亚复合管工程有限公司 | RTP (reinforced thermoplastic pipe) joint |
| CN203099188U (en) * | 2012-12-30 | 2013-07-31 | 广州励进新技术有限公司 | Rein-forced thermoplastic pipe (RTP) anti-corrosion pressure connection pipe fitting |
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