Pipe winding device, pipe preparation equipment, glass steel pipe and preparation method

Abstract

Pipe winding device, pipe preparation equipment, glass steel pipe and preparation method belong to the technical field of glass steel pipe. The pipe preparation equipment is used for threading one end of a fiber tape through a guide head and fixing it on the surface of a winding mold. Then, the winding mold and an auxiliary winding cylinder are driven to rotate synchronously by a driver, and the guide head is driven to reciprocate along the axial direction of the winding mold by a control assembly, so that the fiber tape is wound on the winding mold and the auxiliary winding cylinder across the end of the winding mold, and turns back at the auxiliary winding cylinder. Then, the first winding layer wound on the winding mold and the second winding layer wound on the auxiliary winding mold are separated by a cutting machine. Since the fiber tape turns at the auxiliary winding cylinder, the winding thickness of the end of the winding mold can be reduced.

Description

Technical Field

[0001] This application relates to the field of fiberglass pipe technology, and more specifically, to a pipe winding device, pipe preparation equipment, fiberglass pipe, and preparation method. Background Technology

[0002] Fiberglass reinforced plastic (FRP) pipes are lightweight, high-strength, and corrosion-resistant non-metallic pipes. Compared with ordinary steel pipes, FRP pipes have advantages such as longer service life, lower overall cost, quick installation, and high safety and reliability, and are widely used in industries such as petroleum, chemical, and drainage.

[0003] Currently, the manufacturing method for fiberglass pipes typically employs glass fiber winding. However, fiberglass pipes manufactured using existing equipment exhibit uneven thickness at the ends, with the ends being thicker than other parts of the pipe. This can easily lead to accumulation and agglomeration, reducing the strength of the fiberglass pipe. Summary of the Invention

[0004] In view of the above-mentioned shortcomings, this application provides a pipe winding device, pipe preparation equipment, fiberglass pipe and preparation method to partially or completely improve the problem of excessive wall thickness at the end of fiberglass pipe in related technologies.

[0005] This application is implemented as follows:

[0006] In a first aspect, an example of this application provides a pipe winding apparatus, including a frame, a winding assembly, and a control assembly. The winding assembly includes a guide head, a winding die, and an auxiliary winding cylinder coaxially arranged. Along the axial direction of the winding die, the winding die has a first end and a second end disposed opposite to each other, and the auxiliary winding cylinder has a third end and a fourth end disposed opposite to each other; the third end is connected to either the first end or the second end, and the outer diameter of the auxiliary winding cylinder gradually decreases along the direction from the third end to the fourth end; the auxiliary winding cylinder is rotatably connected to the frame, so that the auxiliary winding cylinder and the winding die rotate synchronously. The control assembly is configured to drive the guide head to reciprocate axially between the auxiliary winding cylinder and the winding die.

[0007] In the above implementation process, an auxiliary winding cylinder is provided at the end of the winding mold used to wind the fiber filaments to form a winding layer, and the auxiliary winding cylinder and the winding mold are coaxially arranged and rotate synchronously. When using this pipe winding device to prepare fiberglass pipes, the auxiliary winding cylinder and the winding mold rotate synchronously. At this time, the guide head can be controlled by the control component to pull the fiber filament to be wound back and forth between the winding mold and the auxiliary winding cylinder, so that the fiber filament is wound on the outer wall of the winding mold and the auxiliary winding cylinder. Since the auxiliary winding cylinder is located at the end of the winding mold, the guide head will cross the end of the winding mold and continue to move to the auxiliary winding cylinder, and turn back at the auxiliary winding cylinder to continue winding on the surface of the winding mold. This reduces the superposition of multiple layers of fiber filament at the end of the winding mold due to the turning and back of the fiber filament (because of the turning at the auxiliary winding cylinder, the folds of the filament caused by the turning will be wrapped outside the auxiliary sleeve), thereby reducing the thickness of the winding layer at the end of the winding mold.

[0008] Furthermore, the outer wall of the auxiliary sleeve is inclined, which makes it easier for the fiber ribbon to change the winding angle at the inclined surface, reducing the probability of wrinkles when the fiber ribbon turns, shortening the length of the transition section for the smooth turning of the fiber ribbon, thereby improving the quality of the FRP pipe and appropriately reducing the waste rate of glass fiber.

[0009] In conjunction with the first aspect, in a possible embodiment of this application, both the first end and the second end are provided with an auxiliary winding cylinder.

[0010] In the above process, an auxiliary winding cylinder is set at both ends of the winding mold, which can simultaneously reduce the thickness of the pipe wall at both ends of the FRP pipe and further improve the performance of the FRP pipe.

[0011] In conjunction with the first aspect, in a possible embodiment of this application, the winding assembly further includes a rotating shaft, which is rotatably connected to the frame; the winding die and the auxiliary winding cylinder are both sleeved on the rotating shaft, and the rotating shaft drives the winding die and the auxiliary winding cylinder to rotate.

[0012] In the above process, both the winding die and the auxiliary winding cylinder are mounted on the rotating shaft, which allows the winding die and the auxiliary winding cylinder to rotate synchronously. Furthermore, the rotating shaft is rotatably connected to the frame, which provides support for the winding die and the auxiliary winding cylinder while ensuring their normal rotation, so as to form a winding layer on the outer wall of the winding die and the auxiliary winding cylinder.

[0013] In conjunction with the first aspect, in a possible embodiment of this application, the frame includes a first support frame and a second support frame; auxiliary winding cylinders extend from both ends of the rotating shaft, and the first support frame and the second support frame are rotatably connected to both ends of the rotating shaft, respectively.

[0014] In the above implementation process, auxiliary winding cylinders are extended from both ends of the rotating shaft so that the two ends of the rotating shaft can be connected to the first support frame and the second support frame in the frame. This can improve the support stability of the winding mold and the auxiliary winding cylinder, and also facilitate the movement of the guide head between the winding mold and the auxiliary winding cylinder between the two support frames.

[0015] In a second aspect, an example of this application provides a pipe manufacturing apparatus, including the pipe winding device, driver, and cutter provided in the first aspect. The driver is configured to drive the winding die to rotate; the cutter is configured to separate the winding layer wound on the winding die and the winding layer wound on the auxiliary winding cylinder from each other.

[0016] When manufacturing fiberglass pipes using the aforementioned pipe manufacturing equipment, a driver can be used to drive the winding mold and auxiliary winding cylinder to rotate synchronously. Then, a control component is used to control the guide wire head to pull the fiber ribbon to be wound back and forth between the winding mold and the auxiliary winding cylinder, so that the fiber ribbon is wound around the outer walls of the winding mold and the auxiliary winding cylinder. After winding is completed, a cutting machine can be used to cut the winding layer, at which time the winding layer wound on the winding mold and the winding layer wound on the outer wall of the auxiliary winding cylinder are separated from each other.

[0017] Since the auxiliary winding cylinder is located at the end of the winding mold, during the preparation process, the guide wire head will cross the end of the winding mold and continue to move to the auxiliary winding cylinder. It will then turn and rewind at the auxiliary winding cylinder and continue to wind on the surface of the winding mold. This reduces the probability of multiple layers of fiber ribbons overlapping at the end of the winding mold due to the turning and rewinding of the fiber ribbon (because the turning occurs at the auxiliary winding cylinder, the ribbon folds generated by the turning will be wrapped around the outside of the auxiliary winding cylinder). After removing the winding layer wrapped around the outer wall of the auxiliary winding cylinder, the required winding layer for a fiberglass pipe with uniform wall thickness can be obtained by winding it around the surface of the winding mold.

[0018] In a third aspect, an example of this application provides a method for manufacturing a fiberglass pipe, utilizing the pipe manufacturing equipment provided in the second aspect. One end of a fiberglass ribbon is passed through a guide head and fixed to the surface of a winding mold. Then, a driver is used to drive the winding mold and the auxiliary winding cylinder to rotate synchronously, and a control component is used to drive the guide head to move back and forth along the axial direction of the winding mold between the two winding molds and the auxiliary winding cylinder, so that the fiberglass ribbon is wound around the winding mold and the auxiliary winding cylinder to form a winding layer of a preset thickness. The winding layer includes a first winding layer wound around the winding mold and a second winding layer wound around the auxiliary winding cylinder.

[0019] The first and second winding layers are separated by cutting along the positions of the first and / or second ends using a cutting machine.

[0020] In the above-mentioned process, the fiberglass pipe is prepared using the pipe preparation equipment provided in the second aspect. Since the reciprocating guide wire head crosses the end of the winding mold and turns at the auxiliary winding cylinder, the probability of wrinkles and repeated winding at the end of the winding mold due to the turning of the fiber ribbon can be reduced. Then, after the second winding layer wrapped on the outer wall of the auxiliary winding cylinder is removed, a first winding layer with a more uniform wall thickness is obtained, and the fiberglass pipe is formed through the first winding layer.

[0021] In conjunction with the third aspect, in a possible embodiment of this application, a control component is used to control the winding angle of the fiber ribbon, such that the winding angle at the winding die is smaller than the winding angle at the auxiliary winding cylinder.

[0022] In the above implementation process, the control component can be used to adjust the winding angle of the fiber ribbon as needed, adapt to the turning direction of the fiber ribbon, and reduce the probability and degree of wrinkling when the fiber ribbon turns.

[0023] Furthermore, since the outer wall of the auxiliary winding cylinder is inclined, the winding angle of the winding ribbon at the auxiliary winding cylinder is greater than that at the winding mold, which can further reduce the probability of wrinkles occurring when the fiber ribbon turns.

[0024] In conjunction with the third aspect, in a possible embodiment of this application, an inner liner is provided on the surface of the winding mold, and a first winding layer is formed by winding the inner liner using a pipe preparation device;

[0025] Optionally, the inner lining may include a corrosion-resistant and seepage-proof layer.

[0026] In the above process, a layer such as an anti-corrosion and anti-seepage lining is pre-formed on the surface of the winding mold, and then the first winding layer is formed on the lining. This can improve the applicability of the obtained fiberglass pipe.

[0027] In conjunction with the third aspect, in a possible embodiment of this application, along the axial direction, the inner liner includes a first inner liner and two second inner liners; the two second inner liners are respectively located on the surfaces of a first end and a second end, and the first inner liner is located between the two second inner liners. A reinforcing layer is disposed on the surface of each second inner liner; a first winding layer is formed by winding the first inner liner and the reinforcing layer using a pipe-making apparatus.

[0028] In the above implementation process, a reinforcing layer is provided on the inner lining layer at the first end and the second end, which can reinforce the winding layer at the end and prevent the inner lining from cracking due to curing shrinkage when the end is too thick.

[0029] In a fourth aspect, an example of this application provides a fiberglass pipe, which is manufactured according to the fiberglass pipe preparation method provided in the third aspect.

[0030] In the above-mentioned process, the fiberglass pipes prepared by the preparation method provided in the third aspect have a lower degree of wall thickness at the pipe ends and better wall thickness uniformity, which can further improve the performance of the fiberglass pipes. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0032] Figure 1 This refers to existing fiberglass pipe manufacturing equipment;

[0033] Figure 2 A plan view of the pipe preparation equipment provided as an example in this application.

[0034] Icons: 100-Fiberglass pipe manufacturing device; 101-Mold; 1011-Head; 1012-Tail; 102-Wire guide mechanism; 200-Fiberglass strip;

[0035] 1-Pipe preparation equipment; 10-Pipe winding device; 11-Frame; 111-First support frame; 112-Second support frame; 113-Rotating shaft; 12-Winding assembly; 121-Guide head; 122-Winding mold; 1221-First end; 1222-Second end; 123-Auxiliary winding cylinder; 1231-Third end; 1232-Fourth end; 124-Inner liner; 1241-First inner liner; 1242-Second inner liner; 125-Reinforcing layer; 13-Control assembly; 20-Driver; 30-Cut machine; D1-Axial direction. Detailed Implementation

[0036] The embodiments of this application will be described in detail below with reference to examples. However, those skilled in the art will understand that the following examples are for illustrative purposes only and should not be considered as limiting the scope of this application. Unless otherwise specified in the examples, conventional conditions or conditions recommended by the manufacturer shall apply.

[0037] The following provides a detailed description of the pipe winding device, pipe preparation equipment, fiberglass pipe, and preparation method provided in the embodiments of this application:

[0038] The fabrication method for fiberglass pipes typically employs glass fiber winding. Existing fiberglass pipe fabrication equipment (such as 100)... Figure 1 As shown, the fiber ribbon 200 is wound around the outer wall of the mold 101 using a rotating mold 101 and a guide mechanism 102 that reciprocates along the mold axis.

[0039] When manufacturing fiberglass pipes using the existing fiberglass pipe manufacturing apparatus 100, the mold 101 rotates, and the wire guide mechanism 102 moves to the head 1011 of the mold 101 and then turns to move towards the tail 1012 of the mold 101. Similarly, after moving to the tail 1012 of the mold 101, the wire guide mechanism 102 turns again to move towards the head 1011 of the mold 101, and so on, until a winding layer of a predetermined thickness is formed on the outer wall of the mold 101.

[0040] However, when using the existing fiberglass pipe manufacturing apparatus 100 to manufacture fiberglass pipes, because the fiber ribbon 200 has a certain width, when it is turned at the head 1011 or tail 1012 of the mold 101, the fiber ribbon 200 with a certain width inevitably accumulates and wrinkles, resulting in a thicker pipe wall at the fiberglass end. This thicker pipe wall at the fiberglass end may cause the glass pipe to crack.

[0041] Based on this, the inventors provide a pipe preparation device 1. Please refer to [link / reference needed]. Figure 2 The pipe preparation equipment 1 includes a pipe winding device 10, a driver 20, and a cutter 30.

[0042] The pipe winding device 10 includes a frame 11, a winding assembly 12, and a control assembly 13. The winding assembly 12 includes a guide head 121, a winding die 122, and an auxiliary winding cylinder 123 coaxially arranged. Along the axial direction D1 of the winding die 122, the winding die 122 has a first end 1221 and a second end 1222 oppositely arranged, and the auxiliary winding cylinder 123 has a third end 1231 and a fourth end 1232 oppositely arranged. The third end 1231 is connected to either the first end 1221 or the second end 1222, and the outer diameter of the auxiliary winding cylinder 123 gradually decreases along the direction from the third end 1231 to the fourth end 1232. The auxiliary winding cylinder 123 is rotatably connected to the frame 11, allowing the auxiliary winding cylinder 123 and the winding die 122 to rotate synchronously. The control assembly 13 is configured to drive the guide head 121 to reciprocate along the axial direction D1 between the auxiliary winding cylinder 123 and the winding die 122.

[0043] The driver 20 is configured to drive the winding die 122 to rotate. The cutter 30 is configured to separate the first winding layer wound on the winding die 122 and the second winding layer wound on the auxiliary winding cylinder 123 from each other.

[0044] When preparing fiberglass pipes using pipe preparation equipment 1, the driver 20 can drive the winding mold 122 and the auxiliary winding cylinder 123 to rotate synchronously. Then, the control component 13 controls the guide head 121 to pull the fiber ribbon 200 to be wound to move back and forth between the winding mold 122 and the auxiliary winding cylinder 123, so that the fiber ribbon 200 is wound around the outer walls of the winding mold 122 and the auxiliary winding cylinder 123. After winding, the winding layer can be cut using a cutting machine 30 to separate the winding layer wound around the winding mold 122 and the winding layer wound around the outer wall of the auxiliary winding cylinder 123.

[0045] Since the auxiliary winding cylinder 123 is located at the end of the winding mold 122, during the preparation process, the guide head 121 will cross the first end 1221 or the second end 1222 of the winding mold 122 and continue to move to the auxiliary winding cylinder 123. It will then turn and rewind at the auxiliary winding cylinder 123 and continue to wind on the surface of the winding mold 122. This reduces the probability of multiple layers of fiber ribbon 200 being superimposed or wrinkles being generated at the first end 1221 or the second end 1222 of the winding mold 122 due to the turning and rewinding of the fiber ribbon 200 (since the guide head 121 turns at the auxiliary winding cylinder 123, the ribbon wrinkles generated by the turning will be wrapped around the outside of the auxiliary winding cylinder 123). After removing the winding layer wrapped around the outer wall of the auxiliary winding cylinder 123, a fiberglass pipe with a uniform wall thickness can be obtained wrapped around the surface of the winding mold 122.

[0046] The following describes in further detail, with reference to the accompanying drawings, the pipe winding device 10, the driver 20, and the cutter 30 in the pipe preparation equipment 1 provided in this application example.

[0047] The frame 11 in the pipe winding device 10 is used to support the winding assembly 12, so that the winding mold 122 and the auxiliary winding cylinder 123 in the winding assembly 12 can rotate under the action of the driver 20.

[0048] This application does not limit the specific configuration of rack 11, and relevant personnel can make corresponding adjustments as needed.

[0049] In one possible implementation, please continue reading Figure 2 The frame 11 includes a first support frame 111 and a second support frame 112.

[0050] The first support frame 111 and the second support frame 112 can be used to support both ends of the winding mold 122, thereby improving the support stability of the winding mold 122 and the auxiliary winding cylinder 123.

[0051] Furthermore, the rotating shaft 113 can be used to rotatably connect its two ends to the first support frame 111 and the second support frame 112, respectively. Then, the winding mold 122 and the auxiliary winding cylinder 123 are sleeved on the outer wall of the rotating shaft 113 and fixedly connected to the rotating shaft 113. The rotating shaft 113 is then connected to the driver 20 to provide support for the winding mold 122 and the auxiliary winding cylinder 123, and to drive the winding mold 122 and the auxiliary winding cylinder 123 to rotate.

[0052] Furthermore, rotating bearings can be embedded in the first support frame 111 and the second support frame 112. One end of the rotating shaft 113 extends into the rotating bearing, and the driver 20 is connected to the end of the rotating shaft 113 that extends into the rotating bearing.

[0053] Furthermore, the frame 11 may also be equipped with a control cabinet or a support arm for the control component 13 to drive the guide head 121 to move.

[0054] The winding assembly 12 is used to wind the fiber ribbon 200 onto the winding mold 122 to form a fiberglass pipe of a preset size.

[0055] The guide head 121 in the winding assembly 12 is used to pull the fiber ribbon 200, so that the fiber ribbon 200 continuously passes through the guide head 121 and is wound around the outer wall of the corresponding winding mold 122 or auxiliary winding cylinder 123.

[0056] To facilitate the traction of the fiber ribbon 200 by the guide head 121, the guide head 121 is connected to the control component 13.

[0057] The winding die 122 is used to carry the winding wire to obtain the fiberglass pipe with movable inner diameter and length dimensions.

[0058] For example, the outer diameter of the winding die 122 is 4000 mm and the length is 6000 mm.

[0059] Furthermore, in order to improve the applicability of the fiberglass pipes prepared using the pipe preparation equipment 1, in one possible embodiment, an inner lining layer 124 may be provided on the surface of the winding mold 122.

[0060] The inner lining layer 124 can be a corrosion-resistant and seepage-proof layer. The inner lining layer 124 includes a first inner lining layer 1241 and two second inner lining layers 1242; the two second inner lining layers 1242 are respectively located on the surfaces of the first end 1221 and the second end 1222, with the first inner lining layer 1241 located between the two second inner lining layers 1242. A reinforcing layer 125 is provided on the surface of each second inner lining layer 1242. A winding layer is formed by winding the first inner lining layer 1241 and the reinforcing layer 125 using pipe fabrication equipment 1.

[0061] The auxiliary winding cylinder 123 is disposed at one end of the winding mold 122 and rotates synchronously with the winding mold 122 so that the guide head 121 can cross the first end 1221 or the second end 1222 of the winding mold 122, move to the auxiliary winding cylinder 123 located outside the first end 1221 or the second end 1222, and turn at the auxiliary winding cylinder 123 to perform reciprocating motion.

[0062] Since the guide head 121 turns at the auxiliary winding cylinder 123 after crossing the first end 1221 or the second end 1222 of the winding mold 122, it can reduce the wrinkles or multi-layer winding caused by the turning of the fiber ribbon 200, thereby reducing the thickness of the tube wall at the first end 1221 or the second end 1222.

[0063] In this application, in order to facilitate the turning of the fiber ribbon 200 and reduce the probability of the fiber ribbon 200 being disordered due to stacking during turning, for example, if the fiber ribbon 200 with a width of 3mm is stacked, the position of the glass fibers in the fiber ribbon 200 will be disordered, which may make it difficult to restore the width of subsequent single winding to 3mm, affecting the quality of the fiberglass pipe, therefore, in the auxiliary winding cylinder 123 provided in this application, the outer diameter of the auxiliary winding cylinder 123 gradually decreases along the direction from the third end 1231 to the fourth end 1232, so that the outer surface of the auxiliary winding cylinder 123 is a slope.

[0064] Furthermore, the auxiliary winding cylinder 123 can be a frustum-shaped sleeve. The circumferential outer wall of the sleeve can be hollow, for example, multiple support plates are radially and evenly distributed around it.

[0065] Furthermore, the outer diameter of the third end 1231 of the auxiliary winding cylinder 123 is the same as the outer diameter of the first end 1221 or the second end 1222 of the winding mold 122.

[0066] The control component 13 drives the guide head 121 to reciprocate along the axial direction D1 between the auxiliary winding cylinder 123 and the winding die 122.

[0067] Furthermore, in one possible implementation, the control component 13 is also equipped to control the winding angle of the fiber ribbon 200.

[0068] For example, the winding angle at the auxiliary winding cylinder 123 is controlled to be greater than the winding angle at the winding mold 122, thereby reducing the degree of wrinkling when the fiber ribbon 200 turns.

[0069] This application does not limit the specific configuration of the control component 13, and relevant personnel can make the appropriate selection as needed.

[0070] In one possible implementation, the control assembly 13 includes a lead screw return motion component. A lead screw and a guide rod extending axially D1 are used, with a sliding block threadedly connected to the lead screw and slidably connected to the guide rod. The guide head 121 is fixedly connected to the sliding block. The movement speed and direction of the sliding block are controlled by controlling the direction and speed of rotation of the lead screw via a motor.

[0071] The driver 20 is used to drive the winding die 122 to rotate. For an example, please refer to [link / reference needed]. Figure 2 The driver 20 drives the rotating shaft 113 to rotate, and the rotating shaft 113 drives the winding mold 122 and the auxiliary winding cylinder 123 to rotate.

[0072] For example, the driver 20 is a motor.

[0073] The cutting machine 30 is used to cut the wound layers after winding, so as to separate the first and second wound layers wound on the winding mold 122.

[0074] For example, the cutting machine 30 includes a high-speed rotating diamond blade. The diamond blade is brought close to the junction of the winding die 122 and the auxiliary winding cylinder 123, while the winding die 122 and the auxiliary winding cylinder 123 rotate synchronously, making a circumferential cut to a certain depth along the junction. The cutting depth is consistent with the thickness of the winding layer.

[0075] Furthermore, this application also provides a method for manufacturing a fiberglass pipe. Using a pipe manufacturing apparatus 1, one end of a fiberglass ribbon 200 is passed through a guide head 121 and fixed to the surface of a winding mold 122. Then, a driver 20 drives the winding mold 122 and the auxiliary winding cylinder 123 to rotate synchronously, and a control component 13 drives the guide head 121 to reciprocate along the axial direction D1 of the winding mold 122 and the auxiliary winding cylinder 123, causing the fiberglass ribbon 200 to wind around the winding mold 122 and the auxiliary winding cylinder 123, forming a winding layer of a predetermined thickness. The winding layer includes a first winding layer wound around the winding mold 122 and a second winding layer wound around the auxiliary winding cylinder 123.

[0076] The first winding layer wound on the winding mold 122 and the second winding layer wound on the auxiliary winding cylinder 123 are separated by the cutting machine 30 along the positions of the first end 1221 and / or the second end 1222.

[0077] Furthermore, the method for preparing fiberglass pipes also includes immersing the fiberglass strip 200 in an adhesive solution before winding it.

[0078] The following describes in further detail the method for preparing the fiberglass pipe provided in this application, with reference to the embodiments.

[0079] Example 1

[0080] Example 1 provides a fiberglass pipe, which is manufactured using the pipe manufacturing equipment 1. The manufacturing method is as follows:

[0081] A conventional inner liner 124 is fabricated on the surface of the winding mold 122; after the inner liner 124 is fabricated, reinforcing fibers are used to reinforce both ends of the inner liner 124 to form a reinforcing layer 125.

[0082] Prepare the resin solution and immerse the fiber ribbon 200 in the solution. Place the immersed fiber ribbon 200 onto the surface of the winding mold 122, start the program, and wind it according to the set line pattern; according to the design results, wind 26 layers circumferentially and 22 layers spirally. The design parameters are shown in Table 1.

[0083] Within the interval between the first end 1221 and the second end 1222 of the winding mold 122, the fiber ribbon 200 operates at a winding angle of 65°. Near the end, the program controls the winding angle to change to 75°, achieving the first variable-angle winding and preparing for end-crossing winding. Upon reaching the end of the winding mold 122, the fiber ribbon 200 directly crosses the end of the winding mold 122 and winds onto the auxiliary winding cylinder 123, then turns and rewinds at the auxiliary winding cylinder 123, while the winding angle changes to 70°. Then, as winding continues, the winding angle returns to 75°, then 65°, repeating this cycle until the set number of layups is reached. The first and second winding layers are separated using a cutting machine 30.

[0084] The measured data of the fiberglass pipe provided in Example 1 are shown in Table 2.

[0085] Table 1

[0086] serial number Production process Nominal diameter Pressure level Single length Design wall thickness Example 1 Fixed-length winding DN4000 1.6MPa 6m 56.5mm

[0087] Comparative Example 1

[0088] Comparative Example 1 provides a fiberglass pipe, which differs from Example 1 in that it is prepared using a prior art fiberglass pipe preparation apparatus 100.

[0089] The measured data of the fiberglass pipe provided in Comparative Example 1 are shown in Table 2.

[0090]

[0091]

[0092] Results analysis: Using the pipe preparation equipment 1 provided in this application to prepare fiberglass pipes can reduce the wall thickness and weight at the ends of the fiberglass pipes and improve the axial strength of the fiberglass pipes.

[0093] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for preparing a fiberglass pipe, characterized in that, It includes the following steps: A pipe winding device is provided, comprising: frame; A winding assembly includes a guide head, a winding die and an auxiliary winding cylinder arranged coaxially; along the axial direction of the winding die, the winding die has a first end and a second end arranged opposite to each other, and the auxiliary winding cylinder has a third end and a fourth end arranged opposite to each other; the third end is connected to the first end or the second end, and the outer diameter of the auxiliary winding cylinder gradually decreases along the direction from the third end to the fourth end; the auxiliary winding cylinder is rotatably connected to the frame, so that the auxiliary winding cylinder and the winding die rotate synchronously; the auxiliary winding cylinder is a frustum-shaped sleeve; A control assembly, the control assembly being configured to drive the guide head to reciprocate along the axial direction between the auxiliary winding cylinder and the winding die; A pipe manufacturing apparatus is provided, comprising: the pipe winding device; a driver configured to drive the winding die to rotate; and a cutter configured to separate the winding layer wound on the winding die and the winding layer wound on the auxiliary winding cylinder. Using the aforementioned tube fabrication equipment, one end of a fiber ribbon is passed through the guide head and fixed to the surface of the winding mold. Then, the driver drives the winding mold and the auxiliary winding cylinder to rotate synchronously, and the control component drives the guide head to reciprocate along the axial direction of the winding mold between the winding mold and the auxiliary winding cylinder. The control component controls the winding angle of the fiber ribbon, ensuring that the winding angle at the winding mold is smaller than the winding angle at the auxiliary winding cylinder, so that the fiber ribbon is wound around the winding mold and the auxiliary winding cylinder to form a winding layer of a predetermined thickness. The winding layer includes a first winding layer wound around the winding mold and a second winding layer wound around the auxiliary winding cylinder. The first winding layer and the second winding layer are separated from each other by using the cutting machine to cut along the position of the first end and / or the second end.

2. The method for preparing fiberglass pipe according to claim 1, characterized in that, Both the first end and the second end are provided with the auxiliary winding cylinder.

3. The method for preparing fiberglass pipe according to claim 1, characterized in that, The winding assembly further includes a rotating shaft, which is rotatably connected to the frame; the winding die and the auxiliary winding cylinder are both sleeved on the rotating shaft, and the rotating shaft drives the winding die and the auxiliary winding cylinder to rotate.

4. The method for preparing fiberglass pipe according to claim 3, characterized in that, The frame includes a first support frame and a second support frame; the auxiliary winding cylinders extend from both ends of the rotating shaft, and the first support frame and the second support frame are rotatably connected to both ends of the rotating shaft.

5. The method for preparing fiberglass pipe according to claim 1, characterized in that, The surface of the winding mold is provided with an inner lining layer, and the first winding layer is formed by winding the inner lining layer using the pipe preparation equipment.

6. The method for preparing fiberglass pipe according to claim 5, characterized in that, The inner lining includes a corrosion-resistant and seepage-proof layer.

7. The method for preparing fiberglass pipe according to claim 5, characterized in that, Along the axial direction, the inner liner includes a first inner liner and two second inner liners; the two second inner liners are respectively located on the surfaces of the first end and the second end, and the first inner liner is located between the two second inner liners; Each of the second inner lining layers has a reinforcing layer on its surface; the first winding layer is formed by winding the first inner lining layer and the reinforcing layer using the pipe fabrication equipment.

8. A fiberglass pipe, characterized in that, The fiberglass pipe is prepared according to any one of claims 1-7.

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