Preparation method and device of FRPP winding pipe

Abstract

The invention mainly relates to the technical field of FRPP winding pipe production, in particular to a preparation method and device for an FRPP winding pipe, and the device comprises a core mold which is internally provided with a radial expansion positioning mechanism; the radial expansion positioning mechanism comprises a first driving unit and a plurality of arc-shaped expansion plates arranged along the circumference, and the arc-shaped expansion plates are matched with the radian of the inner wall of the core mold and synchronously do outward expansion movement along the radial direction under the driving of the first driving unit; and the winding mechanism comprises a second driving unit and a winding cylinder, and the winding cylinder is driven by the second driving unit and used for rotating in the circumferential direction of the core mold while moving in the axis direction of the core mold. The winding mechanism is started, the second driving unit drives the winding cylinder to rotate around the core mold and slowly move along the axis of the core mold, the FRPP strip preassembled on the winding cylinder is continuously wound on the outer surface of the core mold under tension control, and high energy consumption, high noise and potential safety hazards caused by traditional overall driving of the core mold to rotate are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of FRPP winding pipe production, in particular to a preparation method and device of FRPP winding pipe. BACKGROUND

[0002] Fiber reinforced polypropylene (FRPP) winding pipe is widely used in petrochemical industry, municipal water supply and drainage, marine engineering and other fields due to its excellent corrosion resistance, high pressure resistance, impermeability and light weight. Its preparation usually adopts winding forming process, that is, the pre-impregnated or pre-coated FRPP strip material is wound on the surface of the core mold at a certain angle and tension, and the pipe material is formed after subsequent curing treatment.

[0003] At present, the conventional preparation method and device in this field usually adopt the technical scheme of "driving the core mold to rotate". Specifically, the large core mold is driven to rotate around its axis by a motor after being fixed at both ends, and at the same time, the unwinding machine slowly moves along the track parallel to the axis of the core mold, so that the strip material is continuously and uniformly wound on the outer surface of the rotating core mold.

[0004] However, the core mold, as a driven part, is large in size and heavy in weight, up to dozens of tons. Driving such a large mass to rotate requires a large power driving system, which consumes a lot of electric energy and produces a lot of air dynamic noise and mechanical vibration. On the other hand, the existing core mold is usually fixed by flange plate during fixing, which is relatively cumbersome and laborious to install. SUMMARY

[0005] 1. Technical problems to be solved by the present application: The present application provides a preparation method and device of FRPP winding pipe to solve the technical problems existing in the background art.

[0006] 2. Technical solutions: In order to achieve the above purpose, the technical solutions provided by the present application are as follows: a preparation device of FRPP winding pipe, comprising: a core mold, which is internally provided with a radial expansion positioning mechanism; The radial expansion positioning mechanism comprises a first driving unit and a plurality of arc-shaped expansion plates arranged along the circumference, each of the arc-shaped expansion plates is matched with the curvature of the inner wall of the core mold, and is driven by the first driving unit to expand outward along the radial direction synchronously; a winding mechanism comprising a second driving unit and a winding cylinder, the winding cylinder is driven by the second driving unit to rotate around the circumference while moving along the axis of the core mold.

[0007] Further, the second driving unit comprises a gear ring, a connecting ring and a rotating ring, the gear ring is fixedly installed at one end of the rotating shaft of the winding drum, the rotating ring is coaxially arranged on the side of the gear ring away from the winding drum and is rotationally matched with the annular guide rail groove formed on the connecting ring, the gear ring is meshed with a cylindrical gear, the cylindrical gear is rotationally installed through a first bearing seat and is driven by a first driving motor.

[0008] Further, the outer wall of the connecting ring is symmetrically provided with a sliding seat and a threaded driving seat, the sliding seat is slidingly matched with a guide light rod, the threaded driving seat is threadedly matched with a driving screw rod, the guide light rod and the driving screw rod are both installed through a second bearing seat, and the driving screw rod is driven by a second driving motor.

[0009] Further, the radial expansion positioning mechanism comprises a mounting base, a plurality of radial guide sleeves are uniformly arranged on the outer circumferential wall of the mounting base in the circumferential direction, each radial guide sleeve is slidingly matched with a transmission push rod, the outer end of each transmission push rod is fixedly connected with the inner side of a corresponding arc-shaped expansion plate, the inner end is provided with an internal threaded hole, an adjusting screw rod and the internal threaded hole form a threaded pair, and the adjusting screw rod is rotationally connected with the mounting base through a bearing.

[0010] Further, one end of each adjusting screw rod extending into the interior of the mounting base is fixedly installed with a driven bevel gear, all driven bevel gears are meshed with a driving bevel gear, the driving bevel gear is fixedly installed on a transmission shaft, and the transmission shaft is supported in the interior of the mounting base along the axis direction of the mounting base through a bearing.

[0011] Further, one end of the transmission shaft extends to the outside of the mounting base and is fixedly installed with a worm wheel, the worm wheel is meshed with a worm, the worm is rotationally installed on the outer end of the mounting base through a third bearing seat, and one end of the worm is provided with a manual steering wheel.

[0012] Further, the number of radial expansion positioning mechanisms is two, each is supported through a support base, the bottom of the support base is fixedly provided with a guide rail sliding block, the guide rail sliding block is slidingly matched with a linear guide rail, the arrangement direction of the linear guide rail is parallel to the axis direction of the core mold, one end of the linear guide rail is installed with a cylinder driving device, and the piston rod of the cylinder driving device is connected with the guide rail sliding block.

[0013] Further, a preparation method of a preparation device of an FRPP winding pipe, comprising the following steps: S1: adjusting the distance between the two sets of radial expansion positioning mechanisms, moving them to a width sufficient to accommodate the core mold, hoisting the core mold into the two mechanisms, then driving the two sets of radial expansion positioning mechanisms to move towards each other until the two ends of the core mold are stably supported on the corresponding support bases; S2: Start the first drive unit to drive all the arc-shaped expansion plates to move outward in the radial direction synchronously, so that the outer surfaces of the arc-shaped expansion plates are completely attached to the inner wall of the core mold, thereby achieving accurate centering and rigid support of the core mold; S3: Start the second drive unit to drive the winding drum to perform two compound motions simultaneously: rotation around the axis of the core mold and movement along the axial direction thereof; the strip loaded on the winding drum is continuously and uniformly wound around the outer surface of the core mold under constant tension control; S4: By controlling the rotation speed and axial movement speed of the winding drum, the winding pitch is accurately controlled, so that the strip is wound layer by layer and completely covers the entire outer surface of the core mold, until the predetermined winding layer number and pipe wall thickness are reached.

[0014] 3. Beneficial effects: Compared with the prior art, the technical scheme provided by the present application has the following beneficial effects: after the core mold is fixed in the working position, the first drive unit is started to push the plurality of arc-shaped expansion plates to expand radially, so that they are tightly attached to the inner wall of the core mold, thereby achieving accurate centering and stable support. Then the winding mechanism is started, the second drive unit drives the winding drum to rotate around the core mold and slowly move along the axis thereof, so that the FRPP strip preloaded on the winding drum is continuously wound around the outer surface of the core mold under tension control, thereby avoiding the high energy consumption, high noise and safety hazards caused by the traditional overall drive of the core mold rotation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the radial expansion positioning mechanism structure of the present application; Figure 3 is a schematic diagram of the cross-sectional structure of the mounting base of the present application; Figure 4 is a schematic diagram of the Figure 2 is an enlarged structural schematic diagram of position A in the present application; Figure 5 is a schematic diagram of the winding mechanism structure of the present application; Figure 6 is an exploded structural schematic diagram of the gear ring and the connecting ring of the present application.

[0016] Reference signs: 1, core mold; 2, radial expansion positioning mechanism; 201, first driving unit; 2011, mounting base; 2012, radial guide sleeve; 2013, transmission push rod; 2014, internal thread hole; 2015, adjusting screw; 2016, driven bevel gear; 2017, driving bevel gear; 2018, transmission shaft; 2019, worm gear; 2020, worm; 2021, third bearing seat; 2022, manual steering wheel; 202, arc-shaped expansion plate; 203, support base; 204, guide rail slider; 205, linear guide rail; 206, cylinder driving device; 3, winding mechanism; 301, second driving unit; 3011, gear ring; 3012, connecting ring; 3013, rotating ring; 3014, shape guide rail groove; 3015, cylindrical gear; 3016, first bearing seat; 3017, first driving motor; 3018, sliding seat; 3019, threaded driving seat; 3020, guide light pole; 3021, driving screw; 3022, second bearing seat; 3023, second driving motor; 302, winding cylinder. DETAILED DESCRIPTION

[0017] In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the relevant drawings, which show several embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0018] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0019] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0020] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing", "provided with" and other terms should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiments

[0021] Referring to the drawings Figures 1-6 A device for preparing a FRPP winding pipe, comprising: A core mold 1, which is internally provided with a radial expansion positioning mechanism 2; The radial expansion positioning mechanism 2 comprises a first driving unit 201 and a plurality of arc-shaped expansion plates 202 arranged in a circle, each arc-shaped expansion plate 202 is matched with the curvature of the inner wall of the core mold 1, and is driven by the first driving unit 201 to move outward in the radial direction synchronously; A winding mechanism 3, comprising a second driving unit 301 and a winding cylinder 302, the winding cylinder 302 is driven by the second driving unit 301, and is used to rotate around the circumference while moving along the axis of the core mold 1.

[0022] In this embodiment, the core mold 1 is placed in the working position, the first driving unit 201 is started, and the plurality of arc-shaped expansion plates 202 are pushed to expand radially until they are tightly fitted with the inner wall of the core mold 1, achieving accurate centering and stable support of the core mold 1. After positioning is completed, the winding mechanism 3 is started, and the second driving unit 301 drives the winding cylinder 302 to perform a compound motion: rotating around the core mold 1 while slowly moving along its axis, the FRPP strip preloaded on the winding cylinder 302 is continuously released and wound on the outer surface of the core mold 1 under tension control. Through the combination of internal support positioning and external winding motion, the high energy consumption, high noise and safety hazards caused by the traditional driving of the entire core mold 1 rotating are avoided.

[0023] The second driving unit 301 comprises a gear ring 3011, a connecting ring 3012 and a rotating ring 3013, the gear ring 3011 is fixedly installed at one end of the rotating shaft of the winding cylinder 302, the rotating ring 3013 is coaxially arranged on the side of the gear ring 3011 away from the winding cylinder 302, and is in rotating cooperation with the annular guide groove 3014 opened on the connecting ring 3012, the gear ring 3011 is engaged with a cylindrical gear 3015, the cylindrical gear 3015 is rotatably installed through a first bearing seat 3016, and is driven by a first driving motor 3017.

[0024] In this embodiment, when the first driving motor 3017 is started, the cylindrical gear 3015 is driven to rotate, and then the gear ring 3011 and the rotating ring 3013 are driven to rotate along the annular guide groove 3014, and finally the winding cylinder 302 is driven to rotate around the core mold 1.

[0025] The outer wall of the connecting ring 3012 is symmetrically provided with a sliding seat 3018 and a threaded driving seat 3019. The sliding seat 3018 is in sliding fit with a guide light rod 3020, and the threaded driving seat 3019 is in threaded fit with a driving screw rod 3021. The guide light rod 3020 and the driving screw rod 3021 are both installed through a second bearing seat 3022, and the driving screw rod 3021 is driven by a second driving motor 3023.

[0026] In this embodiment, when the second driving motor 3023 is started, the driving screw rod 3021 is driven to rotate, and the connecting ring 3012 is driven to move axially along the guide light rod 3020. Since the axis of the cylindrical gear 3015 is parallel to the axis of the core mold 1, the cylindrical gear 3015 always meshes with the gear ring 3011 during the axial movement of the connecting ring 3012, so that the winding cylinder 302 is continuously rotated around the core mold 1 while moving axially along the core mold 1.

[0027] The radial expansion positioning mechanism 2 comprises a mounting base 2011, and a plurality of radial guide sleeves 2012 are uniformly arranged on the outer circumferential wall of the mounting base 2011 in the circumferential direction. Each radial guide sleeve 2012 is slidably fitted with a transmission push rod 2013. The outer end of each transmission push rod 2013 is fixedly connected to the inner side surface of a corresponding arc-shaped expansion plate 202, and the inner end is provided with an internally threaded hole 2014. An adjusting screw 2015 forms a threaded pair with the internally threaded hole 2014, and the adjusting screw 2015 is rotatably connected to the mounting base 2011 through a bearing.

[0028] In this embodiment, when the adjusting screw 2015 is rotated, the transmission push rod 2013 is driven to slide along the radial guide sleeve 2012 through threaded transmission, so as to drive the arc-shaped expansion plate 202 to move radially to realize expansion and positioning.

[0029] The end of each adjusting screw 2015 extending into the inside of the mounting base 2011 is fixedly installed with a driven bevel gear 2016. All the driven bevel gears 2016 mesh with a driving bevel gear 2017, which is fixedly installed on a transmission shaft 2018. The transmission shaft 2018 is supported inside the mounting base 2011 along the axis direction of the mounting base 2011 through a bearing.

[0030] In this embodiment, when the transmission shaft 2018 is rotated, the driving bevel gear 2017 is driven to rotate, and then all the driven bevel gears 2016 and the adjusting screws 2015 are driven to rotate synchronously, so as to finally make the plurality of arc-shaped expansion plates 202 realize synchronous radial expansion movement.

[0031] One end of the transmission shaft 2018 extends to the outside of the mounting base 2011 and is fixedly mounted with a worm gear 2019, which is engaged with a worm 2020 rotatably mounted on the outer end of the mounting base 2011 through a third bearing seat 2021, and one end of the worm 2020 is provided with a manual control wheel 2022.

[0032] In this embodiment, the manual control wheel 2022 is rotated to drive the worm 2020 to rotate, and then the worm gear 2019 is engaged to drive the transmission shaft 2018 to rotate, which not only has a self-locking function, but also can provide sufficient output torque to ensure reliable support effect.

[0033] The number of the radial expansion positioning mechanisms 2 is two sets, each of which is supported by a support base 203, the bottom of the support base 203 is fixedly provided with a guide rail sliding block 204, the guide rail sliding block 204 is in sliding cooperation with a linear guide rail 205, the arrangement direction of the linear guide rail 205 is parallel to the axial direction of the mandrel 1, and one end of the linear guide rail 205 is provided with a pneumatic cylinder driving device 206, the piston rod of the pneumatic cylinder driving device 206 is connected with the guide rail sliding block 204.

[0034] In this embodiment, the two sets of radial expansion positioning mechanisms 2 are respectively located on the inner sides of the two ends of the mandrel 1, the guide rail sliding block 204 is driven by the pneumatic cylinder driving device 206 to move along the linear guide rail 205, the distance between the two sets of mechanisms can be adjusted to adapt to mandrels 1 of different lengths and to realize stable clamping and positioning of the two ends of the mandrel 1.

[0035] The preparation method of the preparation device of the FRPP winding pipe described above comprises the following steps: S1: Adjust the distance between the two sets of radial expansion positioning mechanisms 2, move them to a width sufficient to accommodate the mandrel 1, hoist and place the mandrel 1 between the two mechanisms, and then drive the two sets of radial expansion positioning mechanisms 2 to move towards each other until the two ends of the mandrel 1 are stably supported on the corresponding support bases 203; S2: Start the first driving unit 201 to drive all the arc-shaped expansion plates 202 to move outward in the radial direction synchronously, so that the outer surfaces of the arc-shaped expansion plates 202 are completely fitted with the inner wall of the mandrel 1, and the mandrel 1 is accurately centered and rigidly supported; S3: Start the second driving unit 301 to drive the winding drum 302 to perform two composite motions simultaneously: rotation around the axis of the mandrel 1 and movement along the axial direction of the mandrel 1; the strip loaded on the winding drum 302 is continuously and uniformly wound and covered on the outer surface of the mandrel 1 under constant tension control; S4: By controlling the rotation speed and axial movement speed of the winding drum 302, the winding pitch is accurately controlled, the strip is wound layer by layer and completely covers the entire outer surface of the mandrel 1, until the predetermined winding layer number and pipe wall thickness are reached.

[0036] The above embodiments only express some implementation manners of the present application, which are described in a more specific and detailed manner, but should not be understood as a limitation on the patent scope of the present application; it should be noted that, for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application; therefore, the protection scope of the present application patent should be subject to the appended claims.

[0037] It should be noted that the above content belongs to the technical cognition range of the inventor, and since the technical content in the field is vast and too complex, the above content of the present application does not necessarily constitute the prior art.

Claims

1. An apparatus for preparing FRPP wound tubes, characterized in that, include: The core mold (1) has a radial expansion positioning mechanism (2) inside it; The radial expansion positioning mechanism (2) includes a first driving unit (201) and a plurality of arc-shaped expansion plates (202) arranged along the circumference. Each arc-shaped expansion plate (202) matches the curvature of the inner wall of the core mold (1) and moves outward in a radial direction under the drive of the first driving unit (201). The winding mechanism (3) includes a second drive unit (301) and a winding cylinder (302), the winding cylinder (302) being driven by the second drive unit (301) for rotating around the mandrel (1) while moving along the axial direction of the mandrel (1).

2. The apparatus for preparing FRPP wound tube according to claim 1, characterized in that: The second drive unit (301) includes a gear ring (3011), a connecting ring (3012), and a rotating ring (3013). The gear ring (3011) is fixedly installed on one end of the rotating shaft of the winding cylinder (302). The rotating ring (3013) is coaxially arranged on the side of the gear ring (3011) away from the winding cylinder (302) and rotates in cooperation with the annular guide groove (3014) opened on the connecting ring (3012). The gear ring (3011) meshes with a cylindrical gear (3015). The cylindrical gear (3015) is rotatably installed through a first bearing seat (3016) and driven by a first drive motor (3017).

3. The apparatus for preparing FRPP wound tube according to claim 2, characterized in that: The outer wall of the connecting ring (3012) is symmetrically provided with a sliding seat (3018) and a threaded drive seat (3019). The sliding seat (3018) is slidably engaged with a guide rod (3020), and the threaded drive seat (3019) is threadedly engaged with a drive screw (3021). The guide rod (3020) and the drive screw (3021) are both installed through a second bearing seat (3022), and the drive screw (3021) is driven by a second drive motor (3023).

4. The apparatus for preparing FRPP wound tube according to claim 1, characterized in that: The radial expansion positioning mechanism (2) includes a mounting base (2011). Multiple radial guide sleeves (2012) are evenly arranged on the outer peripheral wall of the mounting base (2011) along the circumferential direction. A transmission push rod (2013) is slidably fitted inside each radial guide sleeve (2012). The outer end of each transmission push rod (2013) is fixedly connected to the inner side of the corresponding arc-shaped expansion plate (202). The inner end is machined with an internal threaded hole (2014). An adjusting screw (2015) and the internal threaded hole (2014) form a threaded pair. The adjusting screw (2015) is rotatably connected to the mounting base (2011) through a bearing.

5. The apparatus for preparing FRPP wound tube according to claim 4, characterized in that: Each of the adjusting screws (2015) has a driven bevel gear (2016) fixedly mounted at one end of its extension into the mounting base (2011). All driven bevel gears (2016) mesh with a driving bevel gear (2017), which is fixedly mounted on a drive shaft (2018). The drive shaft (2018) is supported inside the mounting base (2011) by bearings along the axial direction of the mounting base (2011).

6. The apparatus for preparing FRPP wound tube according to claim 5, characterized in that: One end of the drive shaft (2018) extends to the outside of the mounting base (2011) and is fixedly mounted with a worm gear (2019). The worm gear (2019) meshes with a worm (2020). The worm (2020) is rotatably mounted on the outer end of the mounting base (2011) through a third bearing seat (2021), and one end of the worm gear is provided with a manual control wheel (2022).

7. The apparatus for preparing FRPP wound tube according to claim 6, characterized in that: There are two sets of radial expansion positioning mechanisms (2), each supported by a support base (203). A guide rail slider (204) is fixed at the bottom of the support base (203). The guide rail slider (204) is slidably engaged with a linear guide rail (205). The arrangement direction of the linear guide rail (205) is parallel to the axial direction of the core mold (1). A cylinder drive device (206) is installed at one end of the linear guide rail (205). The piston rod of the cylinder drive device (206) is connected to the guide rail slider (204).

8. A method for preparing an FRPP wound tube according to any one of claims 1-7, characterized in that, Includes the following steps: S1: Adjust the distance between the two sets of radial expansion positioning mechanisms (2) and move them to a width sufficient to accommodate the core mold (1). Hoist the core mold (1) between the two mechanisms and then drive the two sets of radial expansion positioning mechanisms (2) to move towards each other until the two ends of the core mold (1) are firmly supported on the corresponding support base (203). S2: Start the first drive unit (201) to drive all the arc expansion plates (202) to expand outward in a radial direction in a synchronous manner, so that their outer surfaces are completely in contact with the inner wall of the core mold (1), thereby achieving precise centering and rigid support for the core mold (1); S3: Start the second drive unit (301) to drive the winding cylinder (302) to perform two compound movements at the same time: rotate around the axis of the mandrel (1) and move along its axis; the strip loaded on the winding cylinder (302) is continuously and uniformly wound and wrapped around the outer surface of the mandrel (1) under constant tension control; S4: By controlling the rotation speed and axial movement speed of the winding cylinder (302), the winding pitch is precisely controlled, so that the strip is wound layer by layer and completely covers the entire outer surface of the mandrel (1) until the predetermined number of winding layers and tube wall thickness are achieved.

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