A low-temperature pipe spiral winding device and forming process

Abstract

The present invention provides a low-temperature pipe spiral winding device and a forming process. The low-temperature pipe spiral winding device is provided with a steel wire winding structure and a fiber cloth winding structure. The steel wire winding structure is provided with two positioning steel wire guide wheels and an extrusion steel wire guide wheel. One end of the steel wire is introduced between the positioning steel wire guide wheel and the extrusion steel wire guide wheel. The steel wire wound on the steel wire guide roller rotates with the turntable under the combined extrusion action of the positioning steel wire guide wheel and the extrusion steel wire guide wheel and translates with the traveling trolley at the same time, so as to uniformly wind the steel wire on the outer periphery of the variable-diameter core mold to form the inner skeleton layer or the outer skeleton layer of the low-temperature pipe. The fiber cloth winding structure is provided with a yarn guide shaft seat. The yarn guide shaft seat is rotatably connected with a yarn guide shaft through a yarn guide shaft rotating shaft. The sealing film or fiber cloth on the yarn guide shaft is uniformly wound and laid on the outer periphery of the inner skeleton layer under the action of the rotation of the turntable and the translation of the traveling trolley according to a preset angle, pitch, and number of layers, so as to complete the winding of the sealing layer or the fiber cloth layer.

Description

Technical Field

[0001] The present invention relates to the technical field of cryogenic pipelines, and particularly relates to a cryogenic pipe spiral winding device and a forming process. Background Art

[0002] In recent years, the liquefied natural gas (LNG) industry has developed rapidly. FLNG (floating liquefied natural gas production unit) is a high-tech ship for offshore natural gas development. The low-temperature flexible pipeline is the core supporting equipment of FLNG and is used for transporting low-temperature liquefied natural gas. The low-temperature flexible pipeline has great market potential, and its extended applications include onshore and waterborne LNG transfer, lightering, and refueling, with a potential market reaching tens of billions.

[0003] Currently, most cryogenic pipes are metal bellows, with poor low-temperature sealing effects. Some have better sealing effects, but the equipment structures for preparation are complex and the preparation processes are cumbersome. Summary of the Invention

[0004] The purpose of the present invention is to solve the above-mentioned technical deficiencies, and provide a cryogenic pipe spiral winding device with a simple structure. Using this device to prepare cryogenic pipes has a simple process and strong operability.

[0005] To this end, the present invention provides a cryogenic pipe spiral winding device, which is provided with a base. The base is provided with a pipe hole. A traveling trolley is provided below the base. The traveling trolley is provided with a motor. The output shaft of the motor is connected with a driving gear. The base is sleeved with a driven gear. The driving gear meshes with the driven gear. The end face of the driven gear is provided with a turntable. The turntable is provided with a steel wire winding structure and a fiber cloth winding structure. The steel wire winding structure is provided with two positioning steel wire guide wheels and a pressing steel wire guide wheel. The outer circumferences of the positioning steel wire guide wheels and the pressing steel wire guide wheel are both provided with steel wire pressing grooves. The steel wire pressing groove of the pressing steel wire guide wheel corresponds to the steel wire pressing grooves of the positioning steel wire guide wheels. The fiber cloth winding structure is provided with a yarn guide shaft seat. The yarn guide shaft seat is fixedly connected with the turntable. The yarn guide shaft seat is rotatably connected with a yarn guide shaft through a yarn guide shaft rotating shaft. A sealing film or fiber cloth is wound around the outer circumference of the yarn guide shaft.

[0006] Preferably, the turntable is connected with a steel wire guide wheel slider seat. The steel wire guide wheel slider seat is connected with a steel wire guide wheel slider. The steel wire guide wheel slider is connected with the positioning steel wire guide wheels and the pressing steel wire guide wheel. Both positioning steel wire guide wheels are vertically arranged and not in the same vertical plane. The pressing steel wire guide wheel is inclined.

[0007] Preferably, the turntable is provided with a positioning hole. The steel wire guide wheel slider seat is provided with a positioning post. The positioning post is arranged in the positioning hole and can rotate along the positioning hole.

[0008] Preferably, the steel wire guide wheel slider is further provided with a steel wire guide wheel adjusting screw to adjust the distance between the pressing steel wire guide wheel and the positioning steel wire guide wheels.

[0009] Preferably, the turntable is further provided with four groups of wire guide rollers, and steel wires are wound around the outer circumferences of the wire guide rollers.

[0010] Preferably, a yarn guide shaft compression spring is also threadedly provided at the end of the yarn guide shaft.

[0011] Preferably, the yarn guide shaft seat is also connected to a yarn guide pressure roller.

[0012] A spiral winding forming process for a cryogenic pipe comprises the following steps: inserting a variable diameter core mold into a pipe hole of a base and fixing both ends thereof, introducing one end of a steel wire from between a positioning steel wire guide wheel and an extrusion steel wire guide wheel, the steel wire wound on a steel wire guide roller rotates with a turntable and translates with a traveling trolley under the joint extrusion action of the positioning steel wire guide wheel and the extrusion steel wire guide wheel, and the steel wire is evenly wound on the outer circumference of the variable diameter core mold to form an inner skeleton layer of the cryogenic pipe; then, a sealing film or a fiber cloth on a yarn guide shaft is evenly wound and laid on the outer circumference of the inner skeleton layer according to a preset angle, pitch, and number of layers under the action of the rotation of the turntable and the translation of the traveling trolley, and the winding of the sealing layer or the fiber cloth layer is completed; finally, a layer of steel wire is also wound on the outer layer of the sealing film and the fiber cloth to form an outer skeleton layer of the cryogenic pipe, and the spiral lines of the inner and outer skeleton layers are staggered and wound with half a pitch.

[0013] The present invention provides a low-temperature pipe spiral winding device and a forming process, which have the following beneficial effects:

[0014] The low-temperature pipe spiral winding equipment of the present invention is provided with a steel wire winding structure and a fiber cloth winding structure. The steel wire winding structure is provided with two positioning steel wire guide wheels and an extrusion steel wire guide wheel. The steel wire rotates with the turntable and translates with the traveling trolley under the joint extrusion action of the positioning steel wire guide wheel and the extrusion steel wire guide wheel, and the steel wire is evenly wound around the outer periphery of the variable diameter core mold to form the inner skeleton layer or outer skeleton layer of the low-temperature pipe. The fiber cloth winding structure is provided with a yarn guide shaft seat, and the yarn guide shaft seat is rotatably connected with a yarn guide shaft through a yarn guide shaft rotating shaft. The sealing film or fiber cloth on the yarn guide shaft is evenly wound and laid on the outer periphery of the inner skeleton layer according to the preset angle, pitch, and number of layers under the action of the rotation of the turntable and the translation of the traveling trolley, completing the winding of the sealing layer or the fiber cloth layer.

[0015] The low-temperature pipe spiral winding device has a simple structure and is easy to operate. The low-temperature pipe manufactured by using the low-temperature pipe spiral winding device has strong process operability, and the manufactured low-temperature pipe has good sealing performance and improved pressure resistance, and can be widely used in the field of low-temperature pipeline technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the front view of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the right view of the present invention;

[0018] Figure 3 It is a schematic structural diagram of the top view of the present invention.

[0019] Markings in the figure: 1. Base, 11. Pipe hole, 12. Variable-diameter core mold, 2. Traveling trolley, 21. Motor, 22. Driving gear, 23. Driven gear, 3. Turntable, 31. Steel wire guide wheel slider seat, 32. Steel wire guide wheel slider, 321. Steel wire guide wheel adjusting screw, 33. Positioning steel wire guide wheel, 331. Steel wire extrusion groove, 34. Extrusion steel wire guide wheel, 35. Yarn guide shaft seat, 351. Yarn guide pressure roller, 36. Yarn guide shaft rotating shaft, 37. Yarn guide shaft, 371. Yarn guide shaft compression spring, 38. Positioning hole, 39. Steel wire guide roller, 4. Steel wire, 5. Sealing film or fiber cloth. Specific embodiments

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments to help understand the content of the present invention. The methods used in the present invention are all conventional methods unless otherwise specified; the raw materials and devices used are all conventional commercially available products unless otherwise specified.

[0021] From Figures 1-3As shown in the figure, the present invention provides a low-temperature pipe spiral winding device, which is provided with a base 1. The base 1 is provided with a pipe hole 11. A traveling trolley 2 is arranged below the base 1. The traveling trolley 2 is provided with a motor 21. The output shaft of the motor 21 is connected with a driving gear 22. The outer circumference of the base 1 is sleeved with a driven gear 23. The driven gear 23 is rotatably connected with the base 1 by means of a bearing. The driving gear 22 meshes with the driven gear 23. Under the action of the motor 21, the driven gear 23 makes a rotational motion and at the same time moves translationally along the guide rail with the traveling trolley 2. The end face of the driven gear 23 is provided with a turntable 3. The turntable 3 is provided with a steel wire winding structure and a fiber cloth winding structure. The steel wire winding structure is provided with two positioning steel wire guide wheels 33 and one pressing steel wire guide wheel 34. The outer circumferences of the positioning steel wire guide wheels 33 and the pressing steel wire guide wheel 34 are both provided with steel wire pressing grooves 331. The steel wire pressing groove 331 of the pressing steel wire guide wheel 34 corresponds to the steel wire pressing groove 331 of the positioning steel wire guide wheel 33. When winding the steel wire 4, a variable-diameter core mold 12 is inserted into the pipe hole 11 of the base 1 and fixed at both ends. One end of the steel wire 4 is introduced from the steel wire pressing groove 331 between the positioning steel wire guide wheel 33 and the pressing steel wire guide wheel 34. The steel wire 4 is wound into a spring under the combined pressing action of the positioning steel wire guide wheel 33 and the pressing steel wire guide wheel 34, serving as the inner skeleton layer or the outer skeleton layer of the low-temperature pipe. The fiber cloth winding structure is provided with a yarn guide shaft seat 35. The yarn guide shaft seat 35 is fixedly connected with the turntable 3. The yarn guide shaft seat 35 is rotatably connected with a yarn guide shaft 37 through a yarn guide shaft rotating shaft 36. A sealing film or fiber cloth 5 is wound around the outer circumference of the yarn guide shaft 37. After the inner skeleton layer of the low-temperature pipe is wound, a sealing film or fiber cloth layer is wound around the outer circumference of the inner skeleton layer. The sealing film or fiber cloth 5 is evenly wound and laid around the outer circumference of the inner skeleton layer under the action of the rotation of the turntable 3 and the translation of the traveling trolley 2 according to the preset angle, pitch and number of layers. During the winding process, the winding angle of the sealing layer or fiber cloth layer is adjusted by adjusting the angle of the yarn guide shaft 37. And when the yarn guide shaft 37 reaches one end of the variable-diameter core film with the traveling trolley 2, due to the rotatable connection between the yarn guide shaft 37 and the yarn guide shaft seat 35, under the action of the winding force, the yarn guide shaft 37 changes direction and winds reversely. The reverse winding angle is the same as the forward winding angle but in the opposite direction, playing a role in balancing the internal and external torques to resist torsional deformation and improving the tensile strength of the whole pipe. And the number of reverse winding layers is the same as the number of forward winding layers.

[0022] Further, the turntable 3 is connected with a steel wire guide wheel slider seat 31. The steel wire guide wheel slider seat 31 is connected with a steel wire guide wheel slider 32. The steel wire guide wheel slider 32 is connected with a positioning steel wire guide wheel 33 and a pressing steel wire guide wheel 34. The two positioning steel wire guide wheels 33 are both vertically arranged and not in the same vertical plane. The pressing steel wire guide wheel 34 is obliquely arranged. The pitch size of the wound spring is adjusted by adjusting the height difference between the two positioning steel wire guide wheels 33 and the steel wire guide wheel slider 32.

[0023] Furthermore, the turntable 3 is provided with a positioning hole 38, and the wire guide wheel slider seat 31 is provided with a positioning column. The positioning column is arranged in the positioning hole 38 and can rotate along the positioning hole 38 to change the distance between the wire guide wheel slider 32 and the variable diameter core membrane, so as to adjust the introduction angle of the steel wire 4 to adapt to the preparation of different pipes.

[0024] Furthermore, the wire guide wheel slider 32 is also provided with a wire guide wheel adjustment wire 321 to adjust the distance between the extrusion wire guide wheel 34 and the positioning wire guide wheel 33, and adjust the winding force to control the winding diameter of the spring after winding.

[0025] Furthermore, the turntable 3 is also provided with four groups of wire guide rollers 39 , and the outer circumferences of the wire guide rollers 39 are wound with steel wires 4 .

[0026] Furthermore, a yarn guide shaft compression spring 371 is threadedly connected to the end of the yarn guide shaft 37 , and the yarn guide shaft compression spring 371 can adjust the tension of the sealing film or the fiber cloth 5 , and control the winding force of the sealing film or the fiber cloth 5 .

[0027] Furthermore, the yarn guide shaft seat 35 is also connected to a yarn guide pressure roller 351 to flatten the wound sealing film or fiber cloth 5.

[0028] The steps of preparing a cryogenic tube using the cryogenic tube spiral winding device are as follows:

[0029] First, insert the variable diameter core mold 12 into the pipe hole 11 of the base 1 and fix it at both ends. One end of the steel wire 4 is introduced between the positioning steel wire guide wheel 33 and the extrusion steel wire guide wheel 34. The steel wire 4 wound on the steel wire guide roller 39 rotates with the turntable 3 and translates with the walking trolley 2 under the joint extrusion of the positioning steel wire guide wheel 33 and the extrusion steel wire guide wheel 34, and the steel wire 4 is evenly wound on the outer circumference of the variable diameter core mold 12 to form the inner skeleton layer of the low-temperature pipe. Then, the sealing film or fiber cloth 5 on the guide shaft 37 is evenly wound and laid on the outer circumference of the inner skeleton layer according to the preset angle, pitch, and number of layers under the rotation of the turntable 3 and the translation of the walking trolley 2, completing the winding of the sealing layer or fiber cloth layer, which plays the role of wear resistance, sealing, heat preservation, and circumferential longitudinal reinforcement. During the winding process, the angle of the guide shaft 37 is adjusted to adjust the winding angle of the sealing layer or fiber cloth layer. Finally, a layer of steel wire 4 is also wound around the outer layer of the sealing film and the fiber cloth to form the outer skeleton layer of the cryogenic pipe, and the spiral wires of the inner and outer skeleton layers are staggered by half a pitch. The inner skeleton layer is tensile outward, the outer skeleton layer is tensile inward, and the inner and outer layers squeeze each other, which enhances the sealing effect and pressure resistance of the cryogenic pipe. The inner and outer spiral wire structure avoids the occurrence of radial buckling (radial protrusion) and lateral buckling (lateral offset sliding torsional deformation along the cylindrical surface) of the single-layer spiral wire winding under special circumstances due to axial force.

[0030] After the outer skeleton layer is wound, operate the variable-diameter core mold 12 to reduce the radius of the variable-diameter core mold 12 and separate it from the inner skeleton layer, and the production of the low-temperature pipe is completed.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "left", "right", "upper", "lower", "top", "bottom", "front", "rear", "inner", "outer", "back", "middle", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0032] However, the above are only specific embodiments of the present invention, and the scope of implementation of the present invention cannot be limited thereby. Therefore, the replacement of equivalent components or equivalent changes and modifications made according to the scope of protection of the present invention shall still fall within the scope covered by the claims of the present invention.

Claims

1. A low-temperature pipe spiral winding device, which is provided with a base. The base is provided with a pipe hole. A traveling trolley is arranged below the base. The traveling trolley is provided with a motor. The output shaft of the motor is connected with a driving gear. The base is sleeved with a driven gear. The driving gear is meshed with the driven gear. It is characterized in that, The end surface of the driven gear is provided with a turntable, and the turntable is provided with a wire winding structure and a fiber cloth winding structure, the wire winding structure is provided with two positioning wire guide wheels and an extrusion wire guide wheel, the outer circumferences of the positioning wire guide wheel and the extrusion wire guide wheel are both provided with wire extrusion grooves, and the wire extrusion grooves of the extrusion wire guide wheel correspond to the wire extrusion grooves of the positioning wire guide wheel; the fiber cloth winding structure is provided with a yarn guide shaft seat, the yarn guide shaft seat is fixedly connected to the turntable, the yarn guide shaft seat is rotatably connected with a yarn guide shaft through a yarn guide shaft rotating shaft, and the outer circumference of the yarn guide shaft is wound with a sealing film or fiber cloth; The turntable is connected with a wire guide wheel slider seat, the wire guide wheel slider seat is connected with a wire guide wheel slider, the wire guide wheel slider is connected with the positioning wire guide wheel and the extrusion wire guide wheel, the two positioning wire guide wheels are vertically arranged and are not in the same vertical plane, and the extrusion wire guide wheel is inclined; one end of the steel wire is introduced between the positioning wire guide wheel and the extrusion wire guide wheel, and the steel wire rotates with the turntable and translates with the walking trolley under the joint extrusion action of the positioning wire guide wheel and the extrusion wire guide wheel; The turntable is provided with a positioning hole, and the steel wire guide wheel slider seat is provided with a positioning column, and the positioning column is arranged in the positioning hole and can rotate along the positioning hole to change the distance between the steel wire guide wheel slider and the variable diameter core membrane; The wire guide wheel slider is also provided with a wire guide wheel adjustment wire to adjust the distance between the extrusion wire guide wheel and the positioning wire guide wheel.

2. The low-temperature pipe spiral winding device according to claim 1, characterized in that, The turntable is also provided with four groups of steel wire guide rollers, and steel wires are wound around the outer circumferences of the steel wire guide rollers.

3. The low-temperature pipe spiral winding device according to claim 1, characterized in that, The end of the yarn guide shaft is also threadedly provided with a yarn guide shaft compression spring.

4. A low-temperature pipe spiral winding device according to claim 1, characterized in that, The yarn guide shaft seat is also connected with a yarn guide pressure roller.

5. A low-temperature pipe spiral winding forming process, characterized in that, A low-temperature pipe spiral winding device as described in any one of claims 1 to 4 is used to spirally wind and form the low-temperature pipe, which specifically includes the following steps: inserting a variable diameter core mold into the pipe hole of a base and fixing both ends thereof, introducing one end of a steel wire from between a positioning steel wire guide wheel and an extrusion steel wire guide wheel, and the steel wire wound on the steel wire guide roller rotates with the turntable and translates with the traveling trolley under the joint extrusion action of the positioning steel wire guide wheel and the extrusion steel wire guide wheel, so that the steel wire is evenly wound on the outer circumference of the variable diameter core mold to form an inner skeleton layer of the low-temperature pipe; then, the sealing film or fiber cloth on the yarn guide shaft is evenly wound and laid on the outer circumference of the inner skeleton layer according to a preset angle, pitch, and number of layers under the action of the rotation of the turntable and the translation of the traveling trolley, so as to complete the winding of the sealing layer or the fiber cloth layer; finally, a layer of steel wire is also wound on the outer layer of the sealing film or the fiber cloth to form the outer skeleton layer of the low-temperature pipe, and the spiral lines of the inner and outer skeleton layers are staggered and wound with half a pitch.

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