Polyurethane thermal insulation pipe processing equipment and processing technology

Abstract

The invention discloses polyurethane thermal insulation pipe machining equipment and a machining process, and belongs to the technical field of polyurethane thermal insulation pipe machining. Comprising a conveying chain belt, a power unit, a guide supporting table, a core fixing unit, an end socket tensioning unit, a pipe lifting unit and a limiting die cavity, the power unit comprises two sets of power supporting tables, and the two sets of power supporting tables are arranged outside the conveying chain belt in a right opposite mode; fixed core hydraulic cylinders are fixed to the faces, close to each other, of the power supporting tables, and lock sleeve hydraulic cylinders are fixed to the upper sides and the lower sides of the fixed core hydraulic cylinders correspondingly. The guide support table is arranged between the power support table and the transmission chain belt; the core fixing unit comprises a core column, the core column and the guide supporting table are installed in a sliding mode, one end of the core column is fixed to a core fixing hydraulic cylinder, and a core fixing head of a conical structure is fixed to the other end of the core column. According to the processing equipment and the processing technology for the polyurethane thermal insulation pipe, the continuity of a polyurethane thermal insulation layer is good, binding operation is not needed, and the working efficiency is high.

Description

Technical Field

[0001] The present invention specifically relates to polyurethane thermal insulation pipe processing equipment and a processing technology, and belongs to the technical field of polyurethane thermal insulation pipe processing. Background Art

[0002] The inner layer of the polyurethane thermal insulation pipe is a working steel pipe layer, and seamless pipes, spiral welded pipes or straight seam welded pipes are generally selected. After the water pressure test, the surface of the steel pipe is treated with a shot blasting and rust removal process; the middle layer is a polyurethane thermal insulation layer, which is formed by a high-pressure foaming machine in the cavity formed by the steel pipe and the outer sleeve. The polyurethane raw liquid is injected at one time to form a composite structure of steel pipe, polyurethane foam and outer sleeve. For example, China Patent Authorization Announcement No.: CN115157329B discloses a polyurethane thermal insulation pipe forming equipment and its forming process. The purpose of this structure is to cut the polyurethane thermal insulation pipe; another example is China Patent Announcement No.: CN222891558U, which discloses a polyurethane thermal insulation pipe production and preparation device. This structure is formed by two flat surfaces of different heights. The platform supports the inner and outer tubes respectively, and then the two tubes are positioned by the brackets. At this time, the two tubes are concentric, and the inner tube is pushed into the outer tube by the push plate. The supporting cylinder keeps the inner tube straight and will not bend until the other end of the inner tube enters the outer tube limit frame, the assembly is completed, and the foaming agent can be injected; in the existing technology, most of the outer sleeves are flexible. Before the steel pipe and the outer sleeve are passed through the pipe, the steel pipe needs to be tied. By tying the bracket at intervals on the outside of the steel pipe, after the tying is completed, a support gap is formed between the steel pipe and the outer sleeve through the bracket, which can facilitate the flow of polyurethane raw liquid. The tying work is cumbersome and it is easy to cause the bracket to flip or bend when the pipe is passed through, which leads to eccentricity between the steel pipe and the polyurethane insulation layer and inconsistent thickness of the polyurethane insulation layer. Summary of the Invention

[0003] In order to solve the above problems, the present invention proposes a polyurethane insulation pipe processing equipment and processing technology. The polyurethane insulation layer has good continuity, does not require binding operations, and has high work efficiency.

[0004] The polyurethane thermal insulation pipe processing equipment of the present invention comprises: The transmission chain belt is used to receive the steel pipes that have completed the outer casing threading, and to deliver the steel pipes to the processing position, and to deliver the processed insulation pipes out of the processing position; The power unit includes two sets of power supports, which are arranged opposite to each other on the outside of the transmission chain belt; a centering hydraulic cylinder is fixed on one side of the power supports, and a locking sleeve hydraulic cylinder is fixed on the upper and lower sides of the centering hydraulic cylinder; the power supports can support the centering hydraulic cylinder and the locking sleeve hydraulic cylinder, and the power supports are fixed to the ground by embedded parts or expansion bolts; The guide support is arranged between the power support and the transmission chain; the guide support can realize linear guidance of the core fixing unit during the core fixing process, and can realize linear guidance of the head holding unit during the sliding process; A core fixing unit includes a core column, which is slidably mounted on a guide support. One end of the core column is fixed to a core fixing hydraulic cylinder, and the other end of the core column is fixed with a core fixing head with a conical structure. The two core fixing heads cooperate with each other to realize the centering of the steel pipe and clamp and lock the steel pipe after the centering is completed. The end cap stretching unit includes a stretching device provided at both ends of the outer sleeve and the steel pipe; the end cap stretching unit is fixed to the locking sleeve hydraulic cylinder; the end cap stretching unit seals the gap formed between the outer sleeve and the end of the steel pipe, and after the sealing is completed, the outer sleeve can be stretched by continuously applying force through the locking sleeve hydraulic cylinder; The pipe lifting unit includes a first lifting hydraulic cylinder fixed to the inner side of the conveyor chain, and a Y-shaped positioning seat is fixed to the telescopic end of the first lifting hydraulic cylinder; the first lifting hydraulic cylinder drives the positioning seat to rise and fall, thereby enabling the steel pipe to be ferried between the core unit and the conveyor chain; The limiting mold cavity includes a fixed mold cavity and a movable mold cavity with a semicircular cavity structure; the fixed mold cavity is fixed to the top of the guide support through multiple support rods, and the movable mold cavity is arranged directly below the fixed mold cavity. A second lifting hydraulic cylinder is fixed to the bottom of both ends of the movable mold cavity, and a gluing port is opened on the fixed mold cavity; since the outer sleeve is held and maintained in a held state, the outer side of the outer sleeve is tightly fitted through the fixed mold cavity and the movable mold cavity to achieve wrapping positioning of the outer periphery of the outer sleeve; after positioning is completed, the outer sleeve is opened along the gluing port, and the polyurethane raw material is injected into the gap formed by the steel pipe and the outer sleeve through the opening.

[0005] Furthermore, the head holding unit includes a core sleeve and a pulling disc, the inner side of the core sleeve is a step structure, the core sleeve is arranged at both ends of the outer sleeve, and is movably engaged between the outer sleeve and the steel pipe; a plurality of first notches are spaced apart on the outer edge of the core sleeve; a swing arm is hinged in the first notch through a pin, and a top pressure piece that is pressed against the outer wall of the outer sleeve is fixed on the top of the swing arm; a hook is hinged on the inner side of the first notch opposite to the two sides of the core sleeve; the pulling disc is movably engaged with the inner side of the core sleeve, and a plurality of through holes are provided on the pulling disc, and a through hole is movably engaged in the through hole Insert a long bolt, the long bolt is screwed into the core sleeve, the pulling plate is provided with a second slot opposite to the first slot, the swing arm is movably pressed together with the second slot; the hook is movably hooked with the second slot; the locking sleeve hydraulic cylinder is fixed to the pulling plate, the locking sleeve hydraulic cylinder drives the pulling plate to slide linearly, the pulling plate can drive the swing arm to swing, the swing arm drives the top pressure piece to press together the outer wall of the outer sleeve, and the outer sleeve can be clamped by the top pressure piece and the core sleeve; the hook can separate the core sleeve and the pulling plate according to the production process, or clamp the core sleeve and the pulling plate into one.

[0006] Furthermore, it also includes a floating unit, which includes a plurality of guide shafts fixed between the power support and the guide support and arranged outside the centering hydraulic cylinder and the locking sleeve hydraulic cylinder, a floating plate is slidably installed on the guide shaft, the floating plate is fixed to the outside of the locking sleeve hydraulic cylinder, and a plurality of driving rods are fixed on the side of the floating plate away from the locking sleeve hydraulic cylinder, and the driving rods are fixed to the pulling plate; the floating plate is driven by the locking sleeve hydraulic cylinder and can slide linearly along the guide shaft, and when the floating plate slides, the pulling plate can be synchronously driven to slide synchronously by the driving rod. Since there are multiple driving rods and they are guided by the guide support, the pulling plate can slide linearly.

[0007] Furthermore, a pressure plate is provided on one side of the two core sleeves close to each other, an annular groove is provided between the pressure plate and the core sleeve, a sealing ring is sleeved on the inner side of the annular groove, the sealing ring is fitted with the inner wall of the outer sleeve, the long bolt passes through the core sleeve and is fastened to the pressure plate; the pressure piece and the core sleeve clamp the outer sleeve; during operation, when the core sleeve and the pressure plate are embedded in the inner end of the outer sleeve, as the pulling plate is driven, the pressure piece is pressed to the outside of the core sleeve, so that the pressure piece and the core sleeve clamp the outer sleeve, and at the same time, when the pulling plate is pulled outward, the pressure plate can be synchronously driven to move toward one side of the core sleeve by the long bolt, and the sealing ring is continuously clamped and deformed by the pulling plate and the pressure plate, and the sealing performance of the end of the outer sleeve can be enhanced by the sealing ring.

[0008] Furthermore, an exhaust pipe is axially embedded in the core sleeve and the pulling disc. When the polyurethane foam is injected, exhaust can be carried out through the exhaust pipe. It can also be determined whether the injection is in place based on the polyurethane raw material overflowing from the exhaust pipe.

[0009] Furthermore, the top pressure piece is a pressure wheel installed on the swing arm or an arc-shaped pipe segment fixed at intervals between the tops of adjacent swing arms; multi-point clamping and positioning are performed by multiple pressure wheels, or multi-section clamping and positioning can be achieved by multiple arc-shaped pipe segments.

[0010] Furthermore, the hook is a magnetic hook, and the hook adopts a magnetic structure. When the hook is flipped into place, it can be attracted to the core sleeve or the pull plate to prevent the hook from automatically detaching from the second slot when it is no longer held.

[0011] Furthermore, a panel is fixed on the outside of the transmission chain belt; the two ends of the steel pipe are movably fitted to the inside of the panel, and the two ends of the outer sleeve are arranged on the inside of the transmission chain belt; the two ends of the steel pipe can be limited by the panel, and the transmission chain belt can limit the end of the outer sleeve.

[0012] Furthermore, a limit switch is fixed on the inner side of the enclosure above the transmission chain; the first jacking hydraulic cylinder is fixed on the slider of the horizontal electric slide; when the transmission chain transports the steel pipe forward, when the steel pipe contacts the limit switch, the first jacking hydraulic cylinder is actuated to send the steel pipe to the center position. After the processing is completed, the horizontal electric slide drives the first jacking hydraulic cylinder to slide, and then the first jacking hydraulic cylinder retracts, so that the steel pipe crosses the limit switch and falls back into the transmission chain, and the steel pipe is sent out through the transmission chain.

[0013] A polyurethane insulation pipe processing equipment processing technology, using polyurethane insulation pipe processing equipment, the process is as follows: The first step is to thread the pipe and put the outer sleeve onto the outside of the steel pipe. Then, feed the steel pipe into the conveyor belt and adjust the outer sleeve so that both ends of the outer sleeve are close to the inside of the conveyor belt. In the second step, the transmission is aligned. The transmission chain conveys the steel pipe to the top of the pipe lifting unit. The first lifting hydraulic cylinder drives the positioning seat to push the steel pipe up to the set position. Then, the centering hydraulic cylinder is activated to drive the core column to slide along the guide support. At this time, the two centering heads are embedded in the two ends of the steel pipe. The steel pipe is centered and clamped in place by the two centering heads, and the centering hydraulic cylinder is reset. The third step is to stretch the head, and the locking sleeve hydraulic cylinder drives the core sleeve and the pulling disc to slide along the steel pipe, so that the core sleeve and the pulling disc are close to the end of the outer sleeve. Then, the outer sleeve end is stretched by the pry plate and sleeved onto the outside of the core sleeve. Then, the hook is pulled outward to disengage the hook from the second slot. Then, the locking sleeve hydraulic cylinder returns and drives the pulling disc to move away from one side of the core sleeve. At this time, the pulling disc slides straight along the long bolt, and the core sleeve remains stationary. When the pulling disc slides, it abuts against the swing arm through the second slot, so that the top of the swing arm is close to the outer sleeve. As the pulling disc continues to pull, the top pressure piece on the swing arm clamps the outer end of the outer sleeve, and with the pulling force of the pulling disc, the outer sleeve is kept in a stretched state as a whole. In the fourth step, the outer circumference of the outer sleeve is limited. As the steel pipe is lifted and aligned, and the outer sleeve is stretched, the upper half of the outer sleeve is tightly fitted with the inner wall of the fixed mold cavity. Then, the second lifting hydraulic cylinder drives the movable mold cavity upward. The movable mold cavity and the fixed mold cavity are closed, and the movable mold cavity is tightly fitted with the lower half of the outer sleeve. The fifth step is to inject polyurethane foam. A hole is made on the outer sleeve along the glue injection port. Then, the feed nozzle of the high-pressure foaming machine is connected to the hole 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 carried out. The sixth step is to remove the head and discharge the material. After the polyurethane raw material is solidified and formed, the fixed mold cavity is reset. Then, the locking sleeve hydraulic cylinder extends to release the tension on the outer sleeve. Then, continue to drive the pulling plate toward the core sleeve to release the top pressure of the pressing part. Then, re-engage the hook with the second slot. At this time, the locking sleeve hydraulic cylinder retracts, which can drive the pulling plate and the core sleeve to move synchronously. As the locking sleeve hydraulic cylinder retracts and resets, the core sleeve can be separated from the end of the steel pipe; then, the pipe lifting unit is activated, and the first lifting hydraulic cylinder drives the positioning seat to fit the lower part of the steel pipe, and the centering hydraulic cylinder drives the centering head to separate from both ends of the steel pipe; finally, the pipe lifting unit is reset, so that the processed insulation pipe falls back into the transmission chain belt, and is sent out of the processing position through the transmission chain belt.

[0014] Compared with the prior art, the polyurethane thermal insulation pipe processing equipment and processing technology of the present invention, the head holding unit can realize the head sealing of the outer sleeve end, and after clamping the two ends of the outer sleeve, continuously apply force to hold the outer sleeve, and through the dynamic mold cavity and the fixed mold cavity, the outer wall of the outer sleeve is fitted and limited, so that the gap between the steel pipe and the inside of the outer sleeve is consistent, so that the thickness of the polyurethane insulation layer is consistent, and there is no need to perform binding operation before injecting the polyurethane raw material, so the work efficiency is high, and when the polyurethane raw material is injected, it will not be interfered by the binding pad, and the polyurethane insulation layer has good continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the transmission chain belt of the present invention.

[0016] Figure 2 This is a structural schematic diagram of the polyurethane insulation pipe processing equipment of the present invention without a limiting mold cavity.

[0017] Figure 3 For the present invention Figure 2 Schematic diagram of the locally enlarged structure at point A in the middle.

[0018] Figure 4 It is a schematic diagram of the end surface structure of the pull tray of the present invention.

[0019] Figure 5 It is a schematic diagram of the installation structure of the swing arm and the top pressure piece of the present invention.

[0020] Figure 6It is a schematic diagram of the overall structure of the hook of the present invention.

[0021] Figure 7 This is a structural schematic diagram of Example 1 of the polyurethane insulation pipe processing equipment of the present invention.

[0022] Figure 8 This is a structural schematic diagram of Example 2 of the polyurethane insulation pipe processing equipment of the present invention.

[0023] Figure numerals: 1. Transmission chain belt, 2. Outer sleeve, 3. Steel pipe, 4. Power support, 5. Centering hydraulic cylinder, 6. Sleeve hydraulic cylinder, 7. Guide support, 8. Core column, 9. Centering head, 10. First lifting hydraulic cylinder, 11. Positioning seat, 12. Fixed mold cavity, 13. Moving mold cavity, 14. Support rod, 15. Second lifting hydraulic cylinder, 16. Core sleeve, 17. Pull plate, 18. First notch, 19. Swing arm, 20. Pressing part, 21. Hook, 22. Long bolt, 23. Second notch, 24. Guide shaft, 25. Floating plate, 26. Drive rod, 27. Pressure plate, 28. Sealing ring, 29. Enclosure, 30. Limit switch, 31. Horizontal electric slide. DETAILED DESCRIPTION

[0024] Example 1: like Figures 1 to 7 The polyurethane insulation pipe processing equipment shown includes: The transmission chain belt 1 is used to receive the steel pipe 3 that has completed the outer sleeve 2 and send the steel pipe 3 to the processing position, and send the processed insulation pipe out of the processing position; The power unit includes two groups of power supports 4, which are arranged opposite to each other on the outside of the transmission chain belt 1; a centering hydraulic cylinder 5 is fixed on one side of the power supports 4 close to each other, and a locking sleeve hydraulic cylinder 6 is fixed on the upper and lower sides of the centering hydraulic cylinder 5; the power support 4 can support the centering hydraulic cylinder 5 and the locking sleeve hydraulic cylinder 6, and the power support 4 is fixed to the ground by embedded parts or expansion bolts; The guide support 7 is provided between the power support 4 and the transmission chain 1; the guide support 7 can realize the linear guidance of the core fixing unit during the core fixing process, and can realize the linear guidance of the head holding unit during the sliding process; The core unit includes a core column 8, which is slidably mounted on the guide support 7. One end of the core column 8 is fixed to the core hydraulic cylinder 5, and the other end of the core column 8 is fixed with a core head 9 with a conical structure. The two core heads 9 cooperate with each other to realize the centering of the steel pipe 3 and clamp and lock the steel pipe 3 after the centering is completed. The end cap stretching unit includes a stretching device provided at both ends of the outer sleeve 2 and the steel pipe 3; the end cap stretching unit is fixed to the locking sleeve hydraulic cylinder 6; the end cap stretching unit seals the gap formed between the ends of the outer sleeve 2 and the steel pipe 3, and after the sealing is completed, the outer sleeve 2 can be stretched by continuously applying force through the locking sleeve hydraulic cylinder 6; The pipe lifting unit includes a first lifting hydraulic cylinder 10 fixed to the inner side of the conveyor chain 1. A Y-shaped positioning seat 11 is fixed to the telescopic end of the first lifting hydraulic cylinder 10. The first lifting hydraulic cylinder 10 drives the positioning seat to rise and fall, thereby enabling the steel pipe 3 to be ferried between the core unit and the conveyor chain 1. The limiting mold cavity includes a fixed mold cavity 12 and a movable mold cavity 13 with a semicircular cavity structure; the fixed mold cavity 12 is fixed to the top of the guide support 7 by multiple support rods 14, and the movable mold cavity 13 is arranged directly below the fixed mold cavity 12. A second lifting hydraulic cylinder 15 is fixed to the bottom of both ends of the movable mold cavity 13, and a gluing port is opened on the fixed mold cavity 12; since the outer sleeve 2 is stretched and maintained in a stretched state, the outer side of the outer sleeve 2 is then tightly fitted through the fixed mold cavity 12 and the movable mold cavity 13 to achieve wrapping positioning of the outer periphery of the outer sleeve 2; after positioning is completed, the outer sleeve 2 is opened along the gluing port, and the polyurethane raw material is injected into the gap formed by the steel pipe 3 and the outer sleeve 2 through the opening.

[0025] The head holding unit includes a core sleeve 16 and a pulling plate 17. The inner side of the core sleeve 16 is a step structure. The core sleeve 16 is arranged at both ends of the outer sleeve 2 and is movably engaged between the outer sleeve 2 and the steel pipe 3; a plurality of first notches 18 are spaced apart on the outer edge of the core sleeve 16; a swing arm 19 is hinged in the first notch 18 through a pin, and a top pressure piece 20 is fixed on the top of the swing arm 19 and is pressed against the outer wall of the outer sleeve 2; a hook 21 is hinged in the inner side of the first notch 18 opposite to the two sides of the core sleeve 16; the pulling plate 17 is movably engaged with the inner side of the core sleeve 16, and a plurality of through holes are provided on the pulling plate 17, and long bolts 22 are movably inserted into the through holes. The long bolt 22 is screwed to the core sleeve 16, and the pulling plate 17 is provided with a second slot 23 opposite to the first slot 18, and the swing arm 19 is movably pressed together with the second slot 23; the hook 21 is movably connected to the second slot 23; the locking sleeve hydraulic cylinder 6 is fixed to the pulling plate 17, and the locking sleeve hydraulic cylinder 6 drives the pulling plate 17 to slide linearly, and the pulling plate 17 can drive the swing arm 19 to swing, and the swing arm 19 drives the top pressure piece 20 to press the outer wall of the outer sleeve 2, and the outer sleeve 2 can be clamped by the top pressure piece 20 and the core sleeve 16; the hook 21 can separate the core sleeve 16 and the pulling plate 17 according to the production process, or clamp the core sleeve 16 and the pulling plate 17 into one.

[0026] It also includes a floating unit, which includes a plurality of guide shafts 24 fixed between the power support 4 and the guide support 7 and arranged outside the centering hydraulic cylinder 5 and the locking sleeve hydraulic cylinder 6. A floating plate 25 is slidably installed on the guide shaft 24. The floating plate 25 is fixed to the outside of the locking sleeve hydraulic cylinder 6. A plurality of driving rods 26 are fixed on the side of the floating plate 25 away from the locking sleeve hydraulic cylinder 6. The driving rods 26 are fixed to the pulling plate 17; the floating plate 25 is driven by the locking sleeve hydraulic cylinder 6 and can slide linearly along the guide shaft 24. When the floating plate 25 slides, the pulling plate 17 can be synchronously driven to slide synchronously by the driving rod 26. Since there are multiple driving rods 26 and they are guided by the guide support 7, the pulling plate 17 can slide linearly.

[0027] Example 2: like Figure 8 The polyurethane insulation pipe processing equipment shown in the figure has a top pressure plate 27 provided on one side of the two core sleeves 16 close to each other, and an annular groove is opened between the top pressure plate 27 and the core sleeve 16, and a sealing ring 28 is sleeved on the inner side of the annular groove, and the sealing ring 28 is fitted with the inner wall of the outer sleeve 2, and the long bolt 22 passes through the core sleeve 16 and is fastened with the top pressure plate 27; the top pressure piece 20 and the core sleeve 16 clamp the outer sleeve 2; during operation, when the core sleeve 16 and the top pressure plate 27 are embedded in the inner end of the outer sleeve 2, as the pulling plate 17 is driven, the top pressure piece 20 is pressed against the outside of the core sleeve 16, so that the top pressure piece 20 and the core sleeve 16 clamp the outer sleeve 2. At the same time, when the pulling plate 17 is pulled outward, the top pressure plate 27 can be synchronously driven to move toward one side of the core sleeve 16 by the long bolt 22, and the pulling plate 17 and the top pressure plate 27 are close to each other, thereby continuously clamping and deforming the sealing ring 28, and the sealing performance of the end of the outer sleeve 2 can be enhanced by the sealing ring 28.

[0028] The core sleeve 16 and the pull plate 17 are axially embedded with an exhaust pipe. When the polyurethane foam is injected, exhaust can be carried out through the exhaust pipe. It can also be determined whether the injection is in place based on the polyurethane raw material overflowing from the exhaust pipe.

[0029] The top pressure member 20 is a pressure wheel installed on the swing arm 19 or an arc-shaped pipe section fixed at intervals between the tops of adjacent swing arms 19; multi-point clamping and positioning can be performed through multiple pressure wheels, or multi-section arc-shaped pipe sections can be used to achieve multi-section clamping and positioning.

[0030] The hook 21 is a magnetic hook 21 with a magnetic structure. When the hook 21 is flipped into place, it can be attracted to the core sleeve 16 or the pull plate 17 to prevent the hook 21 from automatically detaching from the second notch 23 when it is no longer held.

[0031] A panel 29 is fixed to the outside of the transmission chain belt 1; the two ends of the steel pipe 3 are movably fitted to the inside of the panel 29, and the two ends of the outer sleeve 2 are arranged on the inside of the transmission chain belt 1; the two ends of the steel pipe 3 can be limited by the panel 29, and the transmission chain belt 1 can limit the end of the outer sleeve 2.

[0032] A limit switch 30 is fixed on the inner side of the enclosure 29 above the transmission chain belt 1; the first jacking hydraulic cylinder 10 is fixed on the slider of the horizontal electric slide 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 jacking hydraulic cylinder 10 is actuated to send the steel pipe 3 to the center position. After the processing is completed, the horizontal electric slide 31 drives the first jacking hydraulic cylinder 10 to slide, and then the first jacking hydraulic cylinder 10 retracts, so that the steel pipe 3 crosses the limit switch 30 and falls back into the transmission chain belt 1, and the steel pipe 3 is sent out through the transmission chain belt 1.

[0033] A polyurethane insulation pipe processing equipment processing technology, using polyurethane insulation pipe processing equipment, the process is as follows: The first step is to thread the pipe and put the outer sleeve 2 onto the outside of the steel pipe 3. Then, the steel pipe 3 is fed into the conveyor chain 1 and the outer sleeve 2 is adjusted so that both ends of the outer sleeve 2 are close to the inner side of the conveyor chain 1. In the second step, the transmission is centered. The transmission chain 1 transfers the steel pipe 3 to the top of the pipe lifting unit. The first lifting hydraulic cylinder 10 drives the positioning seat 11 to push the steel pipe 3 up to the set position. Then, the centering hydraulic cylinder 5 is activated to drive the core column 8 to slide along the guide support 7. At this time, the two centering heads 9 are embedded in the two ends of the steel pipe 3. The steel pipe 3 is centered and clamped and locked by the two centering heads 9. The centering hydraulic cylinder 5 is reset. The third step is to hold the head, and the locking sleeve hydraulic cylinder 6 drives the core sleeve 16 and the pulling plate 17 to slide along the steel pipe 3, so that the core sleeve 16 and the pulling plate 17 are close to the end of the outer sleeve 2. Then, the end of the outer sleeve 2 is held by the pry plate and sleeved onto the outside of the core sleeve 16. Then, the hook 21 is dialed outward to disengage the hook 21 from the second notch 23. Then, the locking sleeve hydraulic cylinder 6 returns and drives the pulling plate 17 to move away from one side of the core sleeve 16. At this time, the pulling plate 17 slides linearly along the long bolt 22, and the core sleeve 16 remains stationary. When the pulling plate 17 slides, it abuts against the swing arm 19 through the second notch 23, so that the top of the swing arm 19 is close to the outer sleeve 2; as the pulling plate 17 continues to pull, the top pressure piece 20 on the swing arm 19 clamps the outer end of the outer sleeve 2, and with the pulling force of the pulling plate 17, the outer sleeve 2 is in a holding state as a whole. In the fourth step, the outer periphery of the outer sleeve 2 is limited. As the steel pipe 3 is lifted and centered, and the outer sleeve 2 is held, the upper half of the outer sleeve 2 is in close contact with the inner wall of the fixed die cavity 12. Then, the second lifting hydraulic cylinder 15 drives the movable die cavity 13 upward. The movable die cavity 13 is closed with the fixed die cavity 12, and the movable die cavity 13 is in close contact with the lower half of the outer sleeve 2. The fifth step is to inject polyurethane foam. A hole is made on the outer sleeve 2 along the glue injection port. Then, the feed nozzle of the high-pressure foaming machine is connected to the hole position, and the polyurethane raw material is injected into the cavity formed by the steel pipe 3 and the outer sleeve 2 at one time, and foaming molding is carried out. The sixth step is to remove the head and discharge the material. After the polyurethane raw material is solidified and formed, the fixed mold cavity 12 is reset. Then, the locking sleeve hydraulic cylinder 6 is extended to release the tension on the outer sleeve 2. Then, the pulling plate 17 is continued to be driven toward the core sleeve 16 to release the top pressure of the pressing part 20. Then, the hook 21 is re-engaged with the second slot 23. At this time, the locking sleeve hydraulic cylinder 6 retracts, which can drive the pulling plate 17 and the core sleeve 16 to move synchronously. As the locking sleeve hydraulic cylinder 6 retracts and resets, the core sleeve 16 can be separated from the end of the steel pipe 3; then, the pipe lifting unit is activated, and the first lifting hydraulic cylinder 10 drives the positioning seat 11 to fit the lower part of the steel pipe 3, and the centering hydraulic cylinder 5 drives the centering head 9 to separate from the two ends of the steel pipe 3; finally, the pipe lifting unit is reset, so that the processed insulation pipe falls back into the transmission chain belt 1, and is sent out of the processing position through the transmission chain belt 1.

[0034] The above embodiments are only preferred implementations of the present invention. Therefore, any equivalent changes or modifications made according to the structures, features and principles described in the scope of application of the present invention are included in the scope of application of the present invention.

Claims

1. A polyurethane insulation pipe processing equipment, characterized by: include: Conveyor chain belt; The power unit includes two sets of power supports, which are arranged opposite to each other on the outside of the transmission chain belt; a centering hydraulic cylinder is fixed on one side of the power supports close to each other, and a locking sleeve hydraulic cylinder is fixed on the upper and lower sides of the centering hydraulic cylinder; A guide support, which is arranged between the power support and the transmission chain belt; A core fixing unit, comprising a core column, the core column being slidably mounted on the guide support, one end of the core column being fixed to the core fixing hydraulic cylinder, and the other end of the core column being fixed to a core fixing head with a conical structure; The head holding unit includes a holding device provided at both ends of the outer sleeve and the steel pipe; the head holding unit is fixed to the locking sleeve hydraulic cylinder; A pipe lifting unit, comprising a first lifting hydraulic cylinder fixed to the inner side of the transmission chain, wherein a Y-shaped positioning seat is fixed to the telescopic end of the first lifting hydraulic cylinder; The limiting mold cavity includes a fixed mold cavity and a movable mold cavity with a semicircular cavity structure; the fixed mold cavity is fixed to the top of the guide support through multiple support rods, and the movable mold cavity is arranged directly below the fixed mold cavity. A second lifting hydraulic cylinder is fixed to the bottom of both ends of the movable mold cavity, and a gluing port is opened on the fixed mold cavity.

2. The polyurethane thermal insulation pipe processing equipment according to claim 1, characterized in that: The head holding unit includes a core sleeve and a pulling disc, the inner side of the core sleeve is a step structure, the core sleeve is arranged at both ends of the outer sleeve, and is movably engaged between the outer sleeve and the steel pipe; a plurality of first slots are spaced apart on the outer edge of the core sleeve; a swing arm is hinged in the first slot through a pin, and a top pressure piece pressed against the outer wall of the outer sleeve is fixed on the top of the swing arm; a hook is hinged on the inner side of the first slot opposite to the two sides of the core sleeve; the pulling disc is movably engaged with the inner side of the core sleeve, a plurality of through holes are provided on the pulling disc, and long bolts are movably inserted into the through holes, and the long bolts are screwed to the core sleeve, and a second slot is provided on the pulling disc opposite to the first slot, and the swing arm is movably pressed against the second slot; the hook is movably connected to the second slot; the locking sleeve hydraulic cylinder is fixed to the pulling disc.

3. The polyurethane thermal insulation pipe processing equipment according to claim 2, characterized in that: It also includes a floating unit, which includes multiple guide shafts fixed between the power support and the guide support and arranged outside the centering hydraulic cylinder and the locking sleeve hydraulic cylinder. A floating plate is slidably installed on the guide shaft, and the floating plate is fixed to the outside of the locking sleeve hydraulic cylinder. Multiple driving rods are fixed on the side of the floating plate away from the locking sleeve hydraulic cylinder, and the driving rods are fixed to the pulling plate.

4. The polyurethane thermal insulation pipe processing equipment according to claim 2, characterized in that: A top pressure plate is provided on one side of the two core sleeves close to each other, an annular groove is provided between the top pressure plate and the core sleeve, a sealing ring is sleeved on the inner side of the annular groove, the sealing ring fits against the inner wall of the outer sleeve, the long bolt passes through the core sleeve and is fastened to the top pressure plate; the top pressure piece and the core sleeve clamp the outer sleeve.

5. The polyurethane thermal insulation pipe processing equipment according to claim 2, characterized in that: An exhaust pipe is axially embedded in the core sleeve and the pull plate.

6. The polyurethane thermal insulation pipe processing equipment according to claim 2, characterized in that: The top pressure piece is a pressure wheel installed on the swing arm or an arc-shaped pipe section fixed at intervals between the tops of adjacent swing arms.

7. The polyurethane thermal insulation pipe processing equipment according to claim 2, characterized in that: The hook is a magnetic hook.

8. The polyurethane thermal insulation pipe processing equipment according to claim 1, characterized in that: A panel is fixed on the outside of the transmission chain belt; the two ends of the steel pipe are movably fitted to the inner side of the panel, and the two ends of the outer sleeve are arranged on the inner side of the transmission chain belt.

9. The polyurethane thermal insulation pipe processing equipment according to claim 8, characterized in that: A limit switch is fixed on the inner side of the enclosure above the transmission chain belt; the first lifting hydraulic cylinder is fixed on the slider of the horizontal electric slide.

10. A polyurethane thermal insulation pipe processing equipment and process, using the polyurethane thermal insulation pipe processing equipment according to claim 2, characterized in that: The process is as follows: The first step is to thread the pipe and put the outer sleeve onto the outside of the steel pipe. Then, feed the steel pipe into the conveyor belt and adjust the outer sleeve so that both ends of the outer sleeve are close to the inside of the conveyor belt. In the second step, the transmission is aligned. The transmission chain conveys the steel pipe to the top of the pipe lifting unit. The first lifting hydraulic cylinder drives the positioning seat to push the steel pipe up to the set position. Then, the centering hydraulic cylinder is activated to drive the core column to slide along the guide support. At this time, the two centering heads are embedded in the two ends of the steel pipe. The steel pipe is centered and clamped in place by the two centering heads, and the centering hydraulic cylinder is reset. The third step is to stretch the head, and the locking sleeve hydraulic cylinder drives the core sleeve and the pulling disc to slide along the steel pipe, so that the core sleeve and the pulling disc are close to the end of the outer sleeve. Then, the outer sleeve end is stretched by the pry plate and sleeved onto the outside of the core sleeve. Then, the hook is pulled outward to disengage the hook from the second slot. Then, the locking sleeve hydraulic cylinder returns and drives the pulling disc to move away from one side of the core sleeve. At this time, the pulling disc slides straight along the long bolt, and the core sleeve remains stationary. When the pulling disc slides, it abuts against the swing arm through the second slot, so that the top of the swing arm is close to the outer sleeve. As the pulling disc continues to pull, the top pressure piece on the swing arm clamps the outer end of the outer sleeve, and with the pulling force of the pulling disc, the outer sleeve is kept in a stretched state as a whole. In the fourth step, the outer circumference of the outer sleeve is limited. As the steel pipe is lifted and aligned, and the outer sleeve is stretched, the upper half of the outer sleeve is tightly fitted with the inner wall of the fixed mold cavity. Then, the second lifting hydraulic cylinder drives the movable mold cavity upward. The movable mold cavity and the fixed mold cavity are closed, and the movable mold cavity is tightly fitted with the lower half of the outer sleeve. The fifth step is to inject polyurethane foam. A hole is made on the outer sleeve along the glue injection port. Then, the feed nozzle of the high-pressure foaming machine is connected to the hole 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 carried out. The sixth step is to remove the head and discharge the material. After the polyurethane raw material is solidified and formed, the fixed mold cavity is reset. Then, the locking sleeve hydraulic cylinder extends to release the tension on the outer sleeve. Then, continue to drive the pulling plate toward the core sleeve to release the top pressure of the pressing part. Then, re-engage the hook with the second slot. At this time, the locking sleeve hydraulic cylinder retracts, which can drive the pulling plate and the core sleeve to move synchronously. As the locking sleeve hydraulic cylinder retracts and resets, the core sleeve can be separated from the end of the steel pipe; then, the pipe lifting unit is activated, and the first lifting hydraulic cylinder drives the positioning seat to fit the lower part of the steel pipe, and the centering hydraulic cylinder drives the centering head to separate from both ends of the steel pipe; finally, the pipe lifting unit is reset, so that the processed insulation pipe falls back into the transmission chain belt, and is sent out of the processing position through the transmission chain belt.

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