Polyurethane thermal insulation pipe processing equipment and processing technology

Abstract

The application discloses a kind of polyurethane heat preservation pipe processing equipment and processing technology, belong to polyurethane heat preservation pipe processing technical field.It includes transmission chain belt, power unit, guide support, fixed core unit, head zhang holds unit, pipe lifting unit and limit mould cavity, the power unit includes two groups of power support, two groups of the power support is set to transmission chain belt outside;The power support is fixed with fixed core hydraulic cylinder on mutually close side, the upper side and the lower side of the fixed core hydraulic cylinder are all fixed with lock sleeve hydraulic cylinder;The guide support is arranged between power support and transmission chain belt;The fixed core unit includes core column, the core column is slidably installed with guide support, one end of the core column is fixed with fixed core hydraulic cylinder, the other end of the core column is fixed with the fixed core head of conical structure;The polyurethane heat preservation pipe processing equipment and processing technology of the application, polyurethane heat preservation layer continuity is good, need not to carry out binding operation, and work efficiency is high.

Description

TECHNICAL FIELD

[0001] The application relates to a polyurethane heat preservation pipe processing device and a processing technology, and belongs to the polyurethane heat preservation pipe processing technical field. BACKGROUND

[0002] The inner layer of the polyurethane heat preservation pipe is a working steel pipe layer, generally a seamless pipe, a spiral welded pipe or a straight seam welded pipe, and after water pressure testing, the surface of the steel pipe is treated by a shot blasting rust removal process; the intermediate layer is a polyurethane heat preservation layer, which is formed by one-time injection of polyurethane raw liquid into the cavity formed by the steel pipe and the outer sleeve pipe by a high-pressure foaming machine, to form a steel pipe, polyurethane foam and outer sleeve pipe composite structure, such as the polyurethane heat preservation pipe forming device and the forming process disclosed in Chinese Patent No. CN115157329B, which aims to cut the polyurethane heat preservation pipe; and such as the polyurethane heat preservation pipe production preparation device disclosed in Chinese Patent No. CN222891558U, which supports the inner and outer pipes on two platforms with different heights respectively, and then positions the two pipes by a supporting groove, at this time, the two pipes are concentric, the inner pipe is pushed into the outer pipe by a push plate, the supporting cylinder keeps the inner pipe straight and prevents it from bending, until the other end of the inner pipe enters the limiting frame of the outer pipe, the assembly is completed, and the foaming agent can be injected. SUMMARY

[0003] To solve the above problems, the application provides a polyurethane heat preservation pipe processing device and a processing technology, and the polyurethane heat preservation layer has good continuity, does not need to be bound, and has high work efficiency.

[0004] The polyurethane heat preservation pipe processing device comprises:

[0005] The transmission chain belt is used for receiving the steel pipe after the outer sleeve pipe is penetrated, and conveying the steel pipe into the processing position and conveying the heat preservation pipe after processing out of the processing position.

[0006] The power unit comprises two groups of power support tables, and the two groups of power support tables are oppositely arranged outside the transmission chain belt; the power support tables are fixed with core fixing hydraulic cylinders on one side close to each other, and the core fixing hydraulic cylinders are fixed with locking sleeve hydraulic cylinders on the upper side and the lower side; the power support tables can support the core fixing hydraulic cylinders and the locking sleeve hydraulic cylinders, and the power support tables are fixed to the ground by pre-buried parts or expansion bolts.

[0007] The guide support is arranged between the power support and the transmission chain belt, and can realize linear guidance during the core positioning process of the core positioning unit and linear guidance during the sliding process of the head holding unit.

[0008] The core positioning unit comprises a core column, which is slidingly arranged on the guide support, one end of the core column is fixed with a core positioning hydraulic cylinder, and the other end of the core column is fixed with a tapered core positioning head; the two core positioning heads are matched with each other, and can realize centering of the steel pipe and clamping and locking of the steel pipe after centering.

[0009] The head holding unit comprises a holding part arranged at both ends of the outer sleeve and the steel pipe; the head holding unit is fixed with a lock sleeve hydraulic cylinder; the head holding unit seals the gap formed at the ends of the outer sleeve and the steel pipe, and after sealing, the outer sleeve is kept in a holding state by the continuous force of the lock sleeve hydraulic cylinder.

[0010] The pipe lifting unit comprises a first lifting hydraulic cylinder fixed on the inner side of the transmission chain belt, and a Y-shaped positioning seat fixed at the extension end of the first lifting hydraulic cylinder; the first lifting hydraulic cylinder drives the positioning seat to lift and lower, so as to realize the transfer of the steel pipe between the core positioning unit and the transmission chain belt.

[0011] The limiting mold cavity comprises a half-circular cavity structure of a fixed mold cavity and a movable mold cavity; the fixed mold cavity is fixed on the top of the guide support through a plurality of supporting rods, the movable mold cavity is arranged opposite to the fixed mold cavity below, the movable mold cavity is fixed with a second lifting hydraulic cylinder at both ends of the bottom, and a glue pouring port is arranged on the fixed mold cavity; since the outer sleeve is held and kept in a holding state, then the outer sleeve is tightly fitted outside by the fixed mold cavity and the movable mold cavity, so as to realize the covering positioning of the outer periphery of the outer sleeve; after positioning, the outer sleeve is opened along the glue pouring port, and the polyurethane raw material is poured into the gap between the steel pipe and the outer sleeve through the opening.

[0012] Further, the head holding unit comprises a core sleeve and a pull plate, the inner side of the core sleeve is a stepped structure, the core sleeve is arranged at both ends of the outer sleeve and movably embedded between the outer sleeve and the steel pipe; a plurality of first notches are arranged on the outer edge of the core sleeve at intervals; a swing arm is hingedly connected in the first notch through a pin column, a top pressing piece is fixed at the top end of the swing arm and pressed against the outer wall of the outer sleeve; a clamping hook is hingedly connected on the inner side of the first notch opposite to the two sides of the core sleeve; the pull plate is movably embedded on the inner side of the core sleeve, a plurality of through holes are formed on the pull plate, long bolts are movably inserted into the through holes, the long bolts are screwed with the core sleeve, a second notch is formed on the pull plate opposite to the first notch, and the swing arm is movably pressed with the second notch; the clamping hook is movably hung with the second notch; the lock sleeve hydraulic cylinder is fixed with the pull plate, the lock sleeve hydraulic cylinder drives the pull plate to slide linearly, the pull plate can drive the swing arm to swing, the swing arm drives the top pressing piece to press against the outer wall of the outer sleeve, and the core sleeve and the top pressing piece can clamp the outer sleeve; the clamping hook can separate or integrate the core sleeve and the pull plate according to the production process.

[0013] Further, it further comprises a floating unit, the floating unit comprises a plurality of guide shafts fixed between the power support and the guide support and arranged outside the core positioning hydraulic cylinder and the lock sleeve hydraulic cylinder, a floating plate is slidably installed on the guide shaft, the floating plate is fixed outside the lock sleeve hydraulic cylinder, a plurality of drive rods are fixed on the side of the floating plate away from the lock sleeve hydraulic cylinder, and the drive rods are fixed with the pull plate; the floating plate is driven by the lock sleeve hydraulic cylinder and can slide linearly along the guide shaft; when the floating plate slides, the pull plate can be synchronously driven by the drive rods to synchronously slide.

[0014] Further, the two core sleeves are provided with a top pressing disc on the side close to each other, a ring groove is formed between the top pressing disc and the core sleeve, a sealing ring is sleeved in the inner side of the ring groove, the sealing ring is attached to the inner wall of the outer sleeve, the long bolts pass through the core sleeve and are fastened with the top pressing disc; the top pressing piece clamps the outer sleeve with the core sleeve; when the core sleeve and the top pressing disc are embedded into the inner end of the outer sleeve during work, the top pressing piece is pressed to the outside of the core sleeve as the pull plate is driven, so that the top pressing piece and the core sleeve clamp the outer sleeve, at the same time, the top pressing disc can be synchronously driven to move to the side of the core sleeve through the long bolts when the pull plate is pulled out, the pull plate and the top pressing disc are close to each other, so that the sealing ring is continuously clamped and deformed, and the sealing property of the end of the outer sleeve is enhanced through the sealing ring.

[0015] Further, the core sleeve and the pull plate are axially embedded with an exhaust pipe, when polyurethane foam is injected, the exhaust pipe can be used for exhaust, and whether the polyurethane raw material is overflowed from the exhaust pipe can be used to determine whether the injection is in place.

[0016] Further, the top pressing piece is a pressing wheel mounted on the swing arm or an arc-shaped pipe segment fixed between the top portions of adjacent swing arms; the multi-point clamping positioning is achieved by the multiple pressing wheels or the multi-segment clamping positioning is achieved by the multiple arc-shaped pipe segments.

[0017] Further, the clamping hook is a magnetic clamping hook, which is capable of being attracted to the core sleeve or the pull plate when the clamping hook is turned to the position, thereby preventing the clamping hook from automatically separating from the second slot in the non-tensioned state.

[0018] Further, the transmission chain belt is externally fixed with a surrounding plate; the steel pipe is movably attached to the inner side of the surrounding plate at both ends, and the outer sleeve pipe is arranged on the inner side of the transmission chain belt at both ends; the surrounding plate can limit the both ends of the steel pipe, and the transmission chain belt can limit the end portions of the outer sleeve pipe.

[0019] Further, the limit switch is fixed on the inner side of the surrounding plate above the transmission chain belt; the first jacking hydraulic cylinder is fixed on the sliding block of the horizontal electric sliding table; when the transmission chain belt transmits the steel pipe forward, the first jacking hydraulic cylinder is actuated when the steel pipe contacts the limit switch, so as to send the steel pipe to the centering position; after the machining is completed, the horizontal electric sliding table drives the first jacking hydraulic cylinder to slide, and then the first jacking hydraulic cylinder is retracted, so that the steel pipe crosses the limit switch and falls into the transmission chain belt again, and the steel pipe is sent out by the transmission chain belt.

[0020] A polyurethane thermal insulation pipe processing equipment and a processing technology thereof, the polyurethane thermal insulation pipe processing equipment is adopted, and the process is as follows:

[0021] Firstly, the pipe is penetrated and loaded, the outer sleeve pipe is sleeved on the outer side of the steel pipe, then the steel pipe is sent to the transmission chain belt, and the outer sleeve pipe is adjusted so that the both ends of the outer sleeve pipe are close to the inner side of the transmission chain belt;

[0022] Secondly, the transmission and centering are performed, the transmission chain belt transmits the steel pipe to the pipe lifting unit directly above, the first jacking hydraulic cylinder drives the positioning seat to jack up the steel pipe to the set position, then the core setting hydraulic cylinder is actuated to drive the core column to slide along the guide support, at this time, the two core setting heads are embedded into the both ends of the steel pipe, and the steel pipe is set and clamped by the two core setting heads, and the core setting hydraulic cylinder is reset.

[0023] Third step, head tension, lock sleeve hydraulic cylinder drive core sleeve and pull plate along the steel pipe sliding, make the core sleeve and pull plate close to the outer sleeve pipe end, then, through the pry plate the outer sleeve pipe end tension, and make it sleeve to the outside of the core sleeve, then, the outer pull card hook, make the hook off the second notch, then, the lock sleeve hydraulic cylinder back, drive pull plate away from the core sleeve side movement, at this time, pull plate along the long bolt linear sliding, the core sleeve remains unchanged, when the pull plate slides, through the second notch abuts the swing arm, make the swing arm top close to the outer sleeve pipe; With the continuous pull of the pull plate, the top pressure on the swing arm will be tightly clamped on the outside of the outer sleeve pipe, and with the pull of the pull plate, the whole outer sleeve pipe is in tension state;

[0024] Fourth step, outer sleeve pipe peripheral limit, due to the steel pipe is lifted and centered, and the outer sleeve pipe tension; At this time, the upper half of the outer sleeve pipe is closely attached to the inner wall of the fixed die cavity, then the second lifting hydraulic cylinder drives the movable die cavity to go up; The movable die cavity and the fixed die cavity are combined, and the movable die cavity is closely attached to the lower half of the outer sleeve pipe.

[0025] Fifth step, polyurethane foam injection, along the glue injection opening to the outer sleeve pipe opening, then, the high-pressure foaming machine supply nozzle is butt jointed with the opening position, and the polyurethane raw material is injected into the cavity formed by the steel pipe and the outer sleeve pipe at one time, and the foaming is formed;

[0026] Sixth step, head removal and discharging, after the polyurethane raw material is cured and formed, the fixed die cavity is reset, then the lock sleeve hydraulic cylinder is extended to release the tension of the outer sleeve pipe, then the pull plate is continuously driven to close to the core sleeve to release the pressure of the top pressure piece, then the hook is recombined with the second notch, at this time, the lock sleeve hydraulic cylinder is retracted, which can drive the pull plate and the core sleeve to move synchronously, with the retraction of the lock sleeve hydraulic cylinder, the core sleeve can be separated from the end of the steel pipe; Then, the pipe lifting unit acts, the first lifting hydraulic cylinder drives the positioning seat to attach to the lower part of the steel pipe, and the core hydraulic cylinder drives the core head to separate from the two ends of the steel pipe; Finally, the pipe lifting unit is reset, so that the finished heat preservation pipe falls into the transmission chain belt again, and is sent out of the machining position through the transmission chain belt.

[0027] Compared with the prior art, the polyurethane heat preservation pipe processing equipment and processing technology can realize the head of the outer sleeve pipe end, and through the clamping of the two ends of the outer sleeve pipe, the continuous force is applied to the outer sleeve pipe, and the outer sleeve pipe is clamped, and the movable die cavity and the fixed die cavity are combined to realize the close limit of the outer wall of the outer sleeve pipe, so that the gap between the steel pipe and the outer sleeve pipe is consistent, the thickness of the polyurethane heat preservation layer is consistent, the polyurethane raw material does not need to be bound before injection, the work efficiency is high, and the polyurethane raw material is not interfered by the binding pad during injection, and the continuity of the polyurethane heat preservation layer is good. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The figure is a schematic view of the whole structure of the transmission chain belt.

[0029] Figure 2 The structure schematic diagram of the polyurethane thermal insulation pipe processing equipment without installing the limiting mold cavity of the application.

[0030] Figure 3 The structure schematic diagram of the polyurethane thermal insulation pipe processing equipment of the application. Figure 2 The structure schematic diagram of the local amplification of A in the middle.

[0031] Figure 4 The structure schematic diagram of the end face of the pull plate of the application.

[0032] Figure 5 The structure schematic diagram of the installation of the swing arm and the pressing piece of the application.

[0033] Figure 6 The structure schematic diagram of the whole structure of the clamping hook of the application.

[0034] Figure 7 The structure schematic diagram of the polyurethane thermal insulation pipe processing equipment embodiment 1 of the application.

[0035] Figure 8 The structure schematic diagram of the polyurethane thermal insulation pipe processing equipment embodiment 2 of the application.

[0036] The figure mark: 1, the transmission chain belt, 2, the outer sleeve pipe, 3, the steel pipe, 4, the power support, 5, the fixed core hydraulic cylinder, 6, the sleeve hydraulic cylinder, 7, the guide support, 8, the core column, 9, the fixed core head, 10, the first jacking hydraulic cylinder, 11, the positioning seat, 12, the fixed mold cavity, 13, the movable mold cavity, 14, the support rod, 15, the second jacking hydraulic cylinder, 16, the core sleeve, 17, the pull plate, 18, the first notch, 19, the swing arm, 20, the pressing piece, 21, the clamping hook, 22, the long strip bolt, 23, the second notch, 24, the guide shaft, 25, the floating plate, 26, the driving rod, 27, the pressing disc, 28, the sealing ring, 29, the fence, 30, the limit switch, 31, the horizontal electric sliding table. DETAILED DESCRIPTION

[0037] Embodiment 1:

[0038] As shown in the polyurethane thermal insulation pipe processing equipment, comprising: Figures 1 to 7

[0039] The transmission chain belt 1 is used for receiving the steel pipe 3 that finishes the outer sleeve pipe 2 pipe, and realizes the steel pipe 3 to be sent into to the processing position, and the finished processing thermal insulation pipe is sent out from the processing position;

[0040] ​Power unit, the power unit includes two groups of power support station 4, two groups of the power support station 4 is opposite to be arranged in the outside of transmission chain belt 1;The power support station 4 is fixed with the fixed core hydraulic cylinder 5 on the side close to each other, the upper side and the lower side of the fixed core hydraulic cylinder 5 are fixed with the lock sleeve hydraulic cylinder 6;Power support station 4 can support fixed core hydraulic cylinder 5 and lock sleeve hydraulic cylinder 6, and power support station 4 is fixed to the ground by pre-buried piece or expansion bolt;

[0041] Guide support station 7, the guide support station 7 is arranged between power support station 4 and transmission chain belt 1;Guide support station 7 can realize the linear guidance of the fixed core unit fixed core process, and can realize the linear guidance of the head holding unit sliding process;

[0042] Fixed core unit, the fixed core unit includes core column 8, the core column 8 is slidably installed with guide support station 7, one end of the core column 8 is fixed with fixed core hydraulic cylinder 5, the other end of the core column 8 is fixed with the fixed core head 9 of conical structure;Two fixed core heads 9 cooperate with each other, can realize the centering of steel pipe 3, and clamp and lock the steel pipe 3 after centering;

[0043] Head holding unit, the head holding unit includes holding setting at both ends of outer sleeve pipe 2 and steel pipe 3;The head holding unit is fixed with lock sleeve hydraulic cylinder 6;The head holding unit completes the sealing of the gap formed at the end of outer sleeve pipe 2 and steel pipe 3, after sealing, through the continuous force of lock sleeve hydraulic cylinder 6, the outer sleeve pipe 2 can be held in tension state;

[0044] Pipe lifting unit, the pipe lifting unit includes first jacking hydraulic cylinder 10 fixed in the inner side of transmission chain belt 1, the telescopic end of the first jacking hydraulic cylinder 10 is fixed with the positioning seat 11 of Y-shaped structure;The first jacking hydraulic cylinder 10 drives the seat to lift, so as to realize the transfer between the fixed core unit and the transmission chain belt 1 of steel pipe 3;

[0045] Limiting die cavity, the limiting die cavity includes fixed die cavity 12 and movable die cavity 13 of semicircular cavity structure;The fixed die cavity 12 is fixed on the top of guide support station 7 by a plurality of support rods 14, the movable die cavity 13 is opposite to be arranged below the fixed die cavity 12, the movable die cavity 13 is fixed with the second jacking hydraulic cylinder 15 at both ends of the bottom, and the fixed die cavity 12 is provided with glue pouring port on the top;Because the outer sleeve pipe 2 is held and kept in tension state, then the fixed die cavity 12 and the movable die cavity 13 are tightly fitted to the outside of the outer sleeve pipe 2, so as to realize the covering positioning of the outer periphery of the outer sleeve pipe 2;After positioning, the outer sleeve pipe 2 is opened along the glue pouring port, and the polyurethane raw material is poured into the gap between the steel pipe 3 and the outer sleeve pipe 2.

[0046] The head holding unit comprises a core sleeve 16 and a pull plate 17, the inner side of the core sleeve 16 is a stepped structure, the core sleeve 16 is arranged at both ends of the outer sleeve pipe 2 and is movably embedded between the outer sleeve pipe 2 and the steel pipe 3, a plurality of first notches 18 are arranged on the outer edge of the core sleeve 16 at intervals, a swing arm 19 is hingedly connected in the first notch 18 through a pin column, a top pressing piece 20 is fixed at the top end of the swing arm 19 and is pressed against the outer wall of the outer sleeve pipe 2, a clamping hook 21 is hingedly connected to the inner side of the first notch 18 opposite to each other on both sides of the core sleeve 16, the pull plate 17 is movably embedded with the inner side of the core sleeve 16, a plurality of through holes are arranged on the pull plate 17, long strip bolts 22 are movably embedded in the through holes, the long strip bolts 22 are screwed with the core sleeve 16, a second notch 23 is arranged on the pull plate 17 opposite to the first notch 18, the swing arm 19 is movably pressed with the second notch 23, the clamping hook 21 is movably hung with the second notch 23, the lock sleeve hydraulic cylinder 6 is fixed with the pull plate 17, the lock sleeve hydraulic cylinder 6 drives the pull plate 17 to linearly slide, the pull plate 17 can drive the swing arm 19 to swing, the swing arm 19 drives the top pressing piece 20 to press against the outer wall of the outer sleeve pipe 2, the core sleeve 16 and the pull plate 17 can be separated or integrated as a whole by the clamping hook 21 according to the production process.

[0047] The floating unit comprises a plurality of guide shafts 24 fixed between the power support 4 and the guide support 7 and arranged outside the core hydraulic cylinder 5 and the lock sleeve hydraulic cylinder 6, a floating plate 25 is slidably installed on the guide shaft 24, the floating plate 25 is fixed outside the lock sleeve hydraulic cylinder 6, a plurality of driving rods 26 are fixed on the side of the floating plate 25 away from the lock sleeve hydraulic cylinder 6, the driving rods 26 are fixed with the pull plate 17, the floating plate 25 is driven by the lock sleeve hydraulic cylinder 6 and can linearly slide along the guide shaft 24, when the floating plate 25 slides, the pull plate 17 can be synchronously driven to slide by the driving rods 26, since the driving rods 26 are arranged in multiple and guided by the guide support 7, the pull plate 17 can linearly slide.

[0048] Example 2:

[0049] As Figure 8The polyurethane insulation pipe processing equipment shown, two said core sleeve 16 are provided with a top pressure disc 27 on one side close to each other, a ring groove is opened between the top pressure disc 27 and the core sleeve 16, a sealing ring 28 is sleeved in the inner side of the ring groove, the sealing ring 28 is attached to the inner wall of the outer sleeve pipe 2, the long bolt 22 passes through the core sleeve 16 and is fastened with the top pressure disc 27; the top pressure piece 20 clamps the outer sleeve pipe 2 with the core sleeve 16; when the core sleeve 16 and the top pressure disc 27 are embedded into the inner end of the outer sleeve pipe 2, the top pressure piece 20 is pressed to the outside of the core sleeve 16 as the driving of the pull plate 17, the top pressure piece 20 and the core sleeve 16 clamp the outer sleeve pipe 2, at the same time, when the pull plate 17 is pulled out, the long bolt 22 can synchronously drive the top pressure disc 27 to move to one side of the core sleeve 16, the pull plate 17 and the top pressure disc 27 are close to each other, so that the sealing ring 28 is continuously clamped and deformed, and the sealing ring 28 can enhance the sealing performance of the end of the outer sleeve pipe 2.

[0050] The core sleeve 16 and the pull plate 17 are axially embedded with an exhaust pipe, when the polyurethane foam is injected, the exhaust pipe can be used for exhaust, and whether the injection is in place can be determined according to the overflow of the polyurethane raw material of the exhaust pipe.

[0051] The top pressure piece 20 is a pressure wheel installed on the swing arm 19 or an arc-shaped pipe segment fixed between the top portions of adjacent swing arms 19; the pressure wheel is used for multi-point clamping positioning, or the arc-shaped pipe segment is used for multi-segment clamping positioning.

[0052] The clamping hook 21 is a magnetic clamping hook 21, the clamping hook 21 adopts a magnetic structure, and after the clamping hook 21 is turned in place, the clamping hook 21 is attracted to the core sleeve 16 or the pull plate 17, so that the clamping hook 21 is prevented from automatically separating from the second slot 23 in the unfolded state.

[0053] The transmission chain belt 1 is externally fixed with a coaming 29; the steel pipe 3 is movably attached to the inner side of the coaming 29 at both ends, and the outer sleeve pipe 2 is arranged on the inner side of the transmission chain belt 1; the coaming 29 can limit the both ends of the steel pipe 3, and the transmission chain belt 1 can limit the end of the outer sleeve pipe 2.

[0054] The coaming 29 is fixed with a limit switch 30 on the upper side of the transmission chain belt 1; the first lifting hydraulic cylinder 10 is fixed on the sliding block of the horizontal electric sliding table 31; when the transmission chain belt 1 transmits the steel pipe 3 forward, when the steel pipe 3 contacts the limit switch 30, the first lifting hydraulic cylinder 10 acts to send the steel pipe 3 to the centering position, after the processing is completed, the horizontal electric sliding table 31 drives the first lifting hydraulic cylinder 10 to slide, then the first lifting hydraulic cylinder 10 retracts, so that the steel pipe 3 crosses the limit switch 30 and falls into the transmission chain belt 1 again, and the transmission chain belt 1 sends out the steel pipe 3.

[0055] A kind of polyurethane thermal insulation pipe processing equipment processing technology, using polyurethane thermal insulation pipe processing equipment, the process is as follows:

[0056] First, pipe loading, the outer sleeve 2 is connected to the outside of the steel pipe 3, then, the steel pipe 3 is sent to the transmission chain belt 1, and the outer sleeve 2 is adjusted so that the two ends of the outer sleeve 2 are close to the inside of the transmission chain belt 1;

[0057] Second, transmission centering, the transmission chain belt 1 delivers the steel pipe 3 directly above the pipe lifting unit, the first lifting hydraulic cylinder 10 drives the positioning seat 11 to lift the steel pipe 3 to the set position, then, the core setting hydraulic cylinder 5 acts to drive the core column 8 to slide along the guide support 7, at this time, the two core setting heads 9 are embedded into the two ends of the steel pipe 3, and the core setting and clamping locking of the steel pipe 3 are completed through the two core setting heads 9, and the core setting hydraulic cylinder 5 is reset;

[0058] Third, head holding, the lock sleeve hydraulic cylinder 6 drives the core sleeve 16 and the pull plate 17 to slide along the steel pipe 3, so that the core sleeve 16 and the pull plate 17 approach the end of the outer sleeve 2, then, the end of the outer sleeve 2 is held by the pry plate and is connected to the outside of the core sleeve 16, then, the outer pull hook 21 makes the hook 21 disengage from the second notch 23, then, the lock sleeve hydraulic cylinder 6 returns to drive the pull plate 17 to move away from the side of the core sleeve 16, at this time, the pull plate 17 slides linearly along the long bolt 22, and the core sleeve 16 remains stationary, when the pull plate 17 slides, the second notch 23 abuts the swing arm 19, so that the top of the swing arm 19 approaches the outer sleeve 2, with the continuous pulling of the pull plate 17, the top pressure piece 20 on the swing arm 19 tightly holds the outer side end of the outer sleeve 2, and the outer sleeve 2 as a whole is in a state of tension with the pulling force of the pull plate 17;

[0059] Fourth, the outer sleeve 2 is limited in the outer periphery, because the steel pipe 3 is lifted and centered, and the outer sleeve 2 is held, at this time, the upper half of the outer sleeve 2 closely adheres to the inner wall of the fixed die cavity 12, then, the second lifting hydraulic cylinder 15 drives the movable die cavity 13 to go up, the movable die cavity 13 is combined with the fixed die cavity 12, and the movable die cavity 13 closely adheres to the lower half of the outer sleeve 2;

[0060] Fifth, polyurethane foam injection, the outer sleeve 2 is drilled along the glue injection port, then, the feed nozzle of the high-pressure foaming machine is connected to the drilled position, and polyurethane raw materials are injected into the cavity formed by the steel pipe 3 and the outer sleeve 2 at one time, and foaming is performed;

[0061] In the sixth step, the head is removed and the material is discharged. After the polyurethane material is cured and formed, the fixed cavity 12 is reset. Then, the lock sleeve hydraulic cylinder 6 is extended, the tension of the outer sleeve 2 is released, then the pull plate 17 is continuously driven to move towards the core sleeve 16, the pressing force of the pressing part 20 is released, then the clamping hook 21 is re-engaged with the second notch 23. At this time, the lock sleeve hydraulic cylinder 6 is retracted, the pull plate 17 and the core sleeve 16 can be driven to move synchronously. With the retraction of the lock sleeve hydraulic cylinder 6, the core sleeve 16 can be separated from the end of the steel pipe 3. Then, the pipe lifting unit is actuated, the first lifting hydraulic cylinder 10 drives the positioning seat 11 to adhere to the lower part of the steel pipe 3, and the core hydraulic cylinder 5 drives the core head 9 to separate from the two ends of the steel pipe 3. Finally, the pipe lifting unit is reset, and the finished heat preservation pipe is re-fallen into the transmission chain belt 1, and is sent out of the processing position through the transmission chain belt 1.

[0062] The above embodiments are only preferred embodiments of the present application, and equivalent changes or modifications made according to the structure, features and principles described in the application scope of the present application are included in the application scope of the present application.

Claims

1. A polyurethane insulated pipe processing apparatus, characterized by: The utility model relates to a kind of steel pipe sealing head automatic production equipment, including: Transmission chain belt, Power unit, the power unit includes two groups of power support, two groups The power support is arranged opposite to the outside of transmission chain belt;The power support is fixed with fixed core hydraulic cylinder on one side close to each other, and the upper side and the lower side of the fixed core hydraulic cylinder are fixed with lock sleeve hydraulic cylinder; Guide support, the guide support is arranged between power support and transmission chain belt; Fixed core unit, the fixed core unit includes core column, the core column is slidably installed with guide support, one end of the core column is fixed with fixed core hydraulic cylinder, and the other end of the core column is fixed with the fixed core head of conical structure; End cap tension holding unit, the end cap tension holding unit is arranged in sleeve pipe and steel pipe two ends;The end cap tension holding unit is fixed with lock sleeve hydraulic cylinder; Pipe lifting unit, the pipe lifting unit includes first jacking hydraulic cylinder fixed in the inner side of transmission chain belt, and the telescopic end of the first jacking hydraulic cylinder is fixed with the positioning seat of Y-shaped structure; Limiting die cavity, the limiting die cavity includes half circle cavity structure's fixed die cavity and movable die cavity;The fixed die cavity is fixed on the top of guide support by a plurality of support rods, and the movable die cavity is arranged opposite below the fixed die cavity, and the movable die cavity is fixed with second jacking hydraulic cylinder at both ends bottom, and the fixed die cavity is provided with glue pouring port on the upper side; The end cap tension holding unit includes core sleeve and pull plate, the inner side of the core sleeve is stepped structure, the core sleeve is arranged in sleeve pipe two ends, and is movably embedded between sleeve pipe and steel pipe;Multiple first notches are arranged on the outer edge of the core sleeve with interval;The first notches are hingedly connected with swing arm through pin column, and the top end of the swing arm is fixed with top pressure piece that is pressed with the outer wall of sleeve pipe;The inner side of the first notches opposite on both sides of the core sleeve is hingedly connected with catch;The pull plate is movably embedded with the inner side of the core sleeve, multiple perforations are arranged on the pull plate, long strip bolt is movably inserted in the perforation, the long strip bolt is screwed with the core sleeve, the second notches are arranged on the pull plate opposite the first notches, and the swing arm is movably pressed with the second notches;The catch is movably hung with the second notches;The lock sleeve hydraulic cylinder is fixed with the pull plate.

2. The polyurethane insulated pipe processing apparatus according to claim 1, characterized by: It also includes floating unit, the floating unit includes a plurality of guide shafts fixed between power support and guide support and arranged outside fixed core hydraulic cylinder and lock sleeve hydraulic cylinder, the floating plate is slidably installed on the guide shaft, the floating plate is fixed outside lock sleeve hydraulic cylinder, and the floating plate is fixed with a plurality of driving rods on the side away from lock sleeve hydraulic cylinder, and the driving rods are fixed with pull plate.

3. The polyurethane insulated pipe processing apparatus of claim 1, wherein: Two The core sleeve is provided with top pressure disc on one side close to each other, and ring groove is arranged between the top pressure disc and the core sleeve, the inner side of the ring groove is sleeved with sealing ring, the sealing ring is attached with the inner wall of sleeve pipe, the long strip bolt passes through the core sleeve and is fastened with the top pressure disc;The top pressure piece is clamped with the core sleeve and sleeve pipe.

4. The polyurethane insulated pipe processing apparatus of claim 1, wherein: The core sleeve and pull plate are axially embedded with exhaust pipe.

5. The polyurethane insulated pipe processing apparatus of claim 1, wherein: The top pressure piece is pressure wheel installed on swing arm or arc pipe segment fixed with interval between the top of adjacent swing arms.

6. The polyurethane insulated pipe processing apparatus of claim 1, wherein: The catch is magnetic catch.

7. The polyurethane insulated tube processing apparatus according to claim 1, wherein: The transmission chain belt is fixed with surrounding plate outside, and the two ends of the steel pipe are movably attached to the inner side of the surrounding plate, and the two ends of the sleeve pipe are arranged in the inner side of transmission chain belt.

8. The polyurethane insulated pipe processing apparatus of claim 7, wherein: The inner side of the surrounding plate is fixed with limit switch above transmission chain belt, and the first jacking hydraulic cylinder is fixed on the slider of horizontal electric sliding table.

9. A process for processing polyurethane insulation pipe using the polyurethane insulation pipe processing apparatus according to claim 1, characterized by, The process is as follows: First step, pipe loading, the outer sleeve is connected to the outside of the steel pipe, then the steel pipe is sent to the transmission chain belt, and the outer sleeve is adjusted so that the two ends of the outer sleeve are close to the inside of the transmission chain belt; Second step, transmission centering, the transmission chain belt delivers the steel pipe directly above the pipe lifting unit, the first lifting hydraulic cylinder drives the positioning seat to lift the steel pipe to the set position, then the core positioning hydraulic cylinder acts to drive the core column to slide along the guide support, at this time, the two core positioning heads are embedded into the two ends of the steel pipe, and the steel pipe is positioned and clamped by the two core positioning heads, and the first lifting hydraulic cylinder resets; Third step, head opening, the sleeve hydraulic cylinder drives the core sleeve and the pull plate to slide along the steel pipe, so that the core sleeve and the pull plate approach the end of the outer sleeve, then the outer sleeve end is opened by the pry plate, and the outer sleeve is connected to the outside of the core sleeve, then the outer pry hook is opened, the pry hook is separated from the second notch, then the sleeve hydraulic cylinder returns to drive the pull plate to move away from the side of the core sleeve, at this time, the pull plate slides linearly along the long bolt, and the core sleeve remains stationary, when the pull plate slides, the second notch abuts the swing arm to make the top of the swing arm close to the outer sleeve; as the pull plate continues to pull, the pressing piece on the swing arm tightly presses the outer side of the end of the outer sleeve, and the outer sleeve is in an open state as a whole under the pulling force of the pull plate; Fourth step, outer sleeve peripheral limiting, as the steel pipe is lifted and centered, and the outer sleeve is opened, at this time, the upper half of the outer sleeve closely adheres to the inner wall of the fixed die cavity, then the second lifting hydraulic cylinder drives the movable die cavity to move upward; the movable die cavity and the fixed die cavity are closed, and the movable die cavity closely adheres to the lower half of the outer sleeve; Fifth step, polyurethane foam injection, the outer sleeve is perforated at the glue injection port, then the feeding nozzle of the high-pressure foaming machine is connected to the perforation position, and the polyurethane raw material is injected into the cavity formed by the steel pipe and the outer sleeve at one time, and foaming molding is performed; Sixth step, head removal and discharge, after the polyurethane raw material is solidified and formed, the fixed die cavity resets, then the sleeve hydraulic cylinder extends to release the tension of the outer sleeve, then the pull plate continues to approach the core sleeve to release the pressing force of the pressing piece, then the hook is re-engaged with the second notch, at this time, the sleeve hydraulic cylinder retracts to drive the pull plate and the core sleeve to move synchronously, as the sleeve hydraulic cylinder retracts and resets, the core sleeve can be separated from the end of the steel pipe; then the pipe lifting unit acts, the first lifting hydraulic cylinder drives the positioning seat to adhere to the lower part of the steel pipe, and the core positioning hydraulic cylinder drives the core positioning head to separate from the two ends of the steel pipe; finally, the pipe lifting unit resets to make the finished insulation pipe fall into the transmission chain belt again, and the transmission chain belt sends it out of the processing position.

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