Glass fiber reinforced plastic storage tank cylinder wall laying method, glass fiber reinforced plastic storage tank and winding equipment

Abstract

The invention belongs to the technical field of glass fiber reinforced plastic storage tank manufacturing, and discloses a glass fiber reinforced plastic storage tank cylinder wall laying method, a glass fiber reinforced plastic storage tank and winding equipment. The glass fiber reinforced plastic storage tank cylinder wall laying method comprises the steps that S100, a lining layer is manufactured on the surface of a mold in a winding mode; s200, after the lining layer is cured, a transition layer is manufactured on the side, away from the mold, of the lining layer; and S300, a structural layer is manufactured on the side, away from the lining layer, of the transition layer, the structural layer comprises an annular fiber layer, an axial fiber layer and an interlayer bonding layer, fibers are wound around the annular fiber layer in the circumferential direction of the mold, the fibers are laid on the axial fiber layer in the axial direction of the mold, and the interlayer bonding layer can permeate between the annular fiber layer and the axial fiber layer. According to the glass fiber reinforced plastic storage tank cylinder wall layering method, the quality of the glass fiber reinforced plastic storage tank can be improved, the interlayer structure reliability is effectively improved, the probability of spot corrosion or spot damage is reduced, then the maintenance possibility is reduced, manpower and material resources are saved, and the problem that the storage tank cannot be put into use for a long time is solved.

Description

Technical Field

[0001] The invention relates to the technical field of manufacturing glass fiber reinforced plastic storage tanks, and in particular to a glass fiber reinforced plastic storage tank cylinder wall laying method, a glass fiber reinforced plastic storage tank and winding equipment. Background Art

[0002] With the development of the chemical industry, the demand for processing chemical raw materials is developing towards high production, and accordingly, the application of FRP large-diameter storage tanks is becoming more and more extensive. The growth in the demand for processing chemical raw materials means that the volume of FRP large-diameter storage tanks needs to be increased accordingly. The heavier the storage medium, the greater the liquid pressure on the bottom of the FRP large-diameter storage tank.

[0003] When the diameter of a FRP large-diameter storage tank reaches 21 meters, the liquid pressure within the one-meter height range of the bottom cylinder is several times that of the top cylinder. If the lining layer has local pitting corrosion or point damage, the chemical liquid inside the tank will penetrate into the structural layer of the tank from the damaged port. If there is an overhead phenomenon between the layers of the tank cylinder, the chemical liquid will follow the fiber direction into the structural layer and flow to other parts of the cylinder, causing further corrosion damage. After the tank leaks, the subsequent maintenance work is extremely cumbersome. It is necessary to empty the tank, determine the leak point within the entire inner wall, and then perform maintenance. The maintenance needs to be carried out simultaneously inside and outside the tank, which greatly consumes labor and will cause the tank to be unable to be put into use for a long time, resulting in long production stoppages and high maintenance costs.

[0004] Therefore, there is an urgent need for a FRP storage tank wall paving method, a FRP storage tank and a winding device to solve the above problems. Summary of the invention

[0005] According to one aspect of the present invention, an object is to provide a method for laying layers on the wall of a FRP tank, which can improve the quality of the FRP tank, effectively enhance the reliability of the interlayer structure, reduce the probability of pitting corrosion or pitting damage, thereby reducing the possibility of maintenance, saving manpower and material resources, and avoiding the problem of the tank being unable to be put into use for a long time.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The method of laying the wall of the FRP tank includes:

[0008] Step S100, winding the inner lining layer on the surface of the mold;

[0009] Step S200, after the inner lining layer is solidified, a transition layer is formed on the side of the inner lining layer away from the mold;

[0010] Step S300, making a structural layer on the side of the transition layer away from the inner lining layer, the structural layer includes a circumferential fiber layer, an axial fiber layer and an interlayer bonding layer, the circumferential fiber layer is formed by winding fibers along the circumference of the mold, the axial fiber layer is formed by laying fibers along the axial direction of the mold, and the interlayer bonding layer can penetrate between the circumferential fiber layer and the axial fiber layer.

[0011] As a preferred embodiment of the method for laying the wall of a FRP storage tank provided by the present invention, in step S300, the annular fiber layer and the axial fiber layer are respectively multiple layers, and the annular fiber layer and the axial fiber layer are alternately arranged.

[0012] As a preferred embodiment of the FRP tank wall plying method provided by the present invention, in step S300, along the axis and in a direction from the top to the bottom, the FRP tank wall plying is sequentially divided into a plurality of plying structures with increasing thickness.

[0013] As a preferred solution of the fiberglass reinforced plastic storage tank wall paving method provided by the present invention, after step S300, the following steps are further performed:

[0014] Step S400: Disposing a finishing layer on the outer layer of the structural layer, wherein the finishing layer can cover the structural layer and flatten the grooves of the structural layer.

[0015] As a preferred solution of the fiberglass storage tank wall laying method provided by the present invention, the axial fiber layer is made of unidirectional cloth, the interlayer bonding layer is made of chopped fibers, and the circumferential fiber layer is made of winding yarn.

[0016] As a preferred solution of the fiberglass reinforced plastic storage tank wall paving method provided by the present invention, the inner lining layer is made of glass fiber chopped strand mat and / or glass fiber surface mat.

[0017] According to another aspect of the present invention, an object is to provide a FRP storage tank, wherein the cylinder wall of the FRP storage tank is manufactured by the FRP storage tank cylinder wall laying method as described in any of the above schemes.

[0018] According to another aspect of the present invention, an object is to provide a winding device, which is used based on the fiberglass reinforced plastic tank wall laying method as described in any of the above schemes, and the winding device comprises:

[0019] A support platform, a mold and a fiber winding device, wherein the mold is rotatably arranged on the support platform around its own axis, and the fiber winding device is arranged on the side of the mold, and the fiber winding device can drive the fiber to reciprocate along the axis direction of the mold.

[0020] As a preferred embodiment of the winding device provided by the present invention, the winding device also includes a control system, which is arranged on the supporting platform, and the rotation drive device of the mold and the fiber winding device are respectively communicatively connected to the control system, and the control system can control the rotation drive device and the fiber winding device according to program settings.

[0021] Beneficial effects of the present invention:

[0022] The fiberglass reinforced plastic tank barrel wall laying method provided by the present invention forms the foundation of the fiberglass reinforced plastic tank barrel wall by winding the inner lining layer on the surface of the mold. After the inner lining layer is solidified, a transition layer is made on the side of the inner lining layer away from the mold. Through the above steps, it is convenient to improve the connection between the structural layer and the inner lining layer, so as to improve the reliability between the structural layer and the inner lining layer. The structural layer is made on the side of the transition layer away from the inner lining layer, and the structural layer includes a circumferential fiber layer, an axial fiber layer and an interlayer bonding layer. The circumferential fiber layer is wound with fibers along the circumference of the mold, and the axial fiber layer is laid with fibers along the axial direction of the mold. The interlayer bonding layer can penetrate between the circumferential fiber layer and the axial fiber layer. Through the above steps, the interlayer bonding layer can improve the connection reliability between the circumferential fiber layer and the axial fiber layer, effectively improve the reliability of the interlayer structure, reduce the probability of pitting corrosion or pitting damage, and thus reduce the possibility of maintenance, save manpower and material resources, and avoid the problem that the tank cannot be put into use for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a flow chart of a method for laying layers on a glass fiber reinforced plastic tank wall provided by an embodiment of the present invention;

[0024] Figure 2 1 is a schematic diagram of the plywork of the first ply structure of the wall of the FRP storage tank provided by an embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the winding device provided in an embodiment of the present invention.

[0026] In the figure:

[0027] 1. Support platform; 2. Mold; 3. Fiber winding device; 4. Control system; 5. Rotation drive device;

[0028] 10. Lining layer; 20. Transition layer; 30. Structural layer; 31. Hoop fiber layer; 32. Axial fiber layer; 33. Interlayer bonding layer;

[0029] 301, first structural layer; 302, second structural layer; 303, third structural layer; 304, fourth structural layer; 305, fifth structural layer; 306, sixth structural layer. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] Figure 1 A flow chart showing a method for laying layers on a glass fiber reinforced plastic tank wall provided by an embodiment of the present invention is shown; Figure 2 A schematic diagram of the plywork of the glass fiber reinforced plastic storage tank wall provided by an embodiment of the present invention is shown. Figure 3 FIG. 2 is a schematic diagram showing the structure of a winding device provided by an embodiment of the present invention. Figure 1-Figure 3 This embodiment provides a winding device and a fiberglass reinforced plastic tank wall laying method. The winding device is used based on the fiberglass reinforced plastic tank wall laying method provided in this embodiment, and the winding device includes a support platform 1, a mold 2 and a fiber winding device 3.

[0035] Specifically, the rotating shaft of the mold 2 is arranged on the supporting platform 1, so that the mold 2 can be rotatably arranged on the supporting platform 1 around its own axis. The fiber winding device 3 is arranged on the side of the mold 2, and the fiber winding device 3 includes a bracket and a fiber outlet portion. The bracket is arranged on the side of the mold 2 and is spaced apart from the mold 2. The fiber outlet portion can be movably arranged on the bracket and can reciprocate along the height direction of the bracket (i.e., the axial direction of the mold 2). In other words, by rotating the mold 2 around its rotating shaft, relative movement can be generated with the fiber winding device 3, and the fibers on the fiber winding device 3 can be circumferentially wound around the mold 2 during the rotation of the mold 2, and the fiber winding device 3 can drive the fibers to reciprocate along the axial direction of the mold 2, thereby realizing the winding and laying of the fibers on the outside of the mold 2.

[0036] Preferably, the winding device further comprises a control system 4. The control system 4 is arranged on the support platform 1. The rotating shaft of the mold 2 is connected to the rotation drive device 5, and the rotation drive device 5 and the fiber winding device 3 are respectively connected to the control system 4 for communication, and the control system 4 can control the rotation drive device 5 and the fiber winding device 3 according to program settings. The control system 4 can specifically select a PLC controller, and its structure and control principle are not described in detail in this embodiment.

[0037] Reference Figure 1 The fiberglass reinforced plastic tank wall paving method provided in this embodiment specifically includes the following steps:

[0038] Step S100 , winding the inner lining layer 10 on the surface of the mold 2 .

[0039] Specifically, the inner lining layer 10 is made of glass fiber chopped strand mat and / or glass fiber surface mat.

[0040] Step S200 : After the inner lining layer 10 is solidified, a transition layer 20 is formed on a side of the inner lining layer 10 away from the mold 2 .

[0041] Step S300, a structural layer 30 is made on the side of the transition layer 20 away from the inner lining layer 10, the structural layer 30 includes a circumferential fiber layer 31, an axial fiber layer 32 and an interlayer bonding layer 33, the circumferential fiber layer 31 is formed by winding fibers along the circumference of the mold 2, the axial fiber layer 32 is formed by laying fibers along the axial direction of the mold 2, and the interlayer bonding layer 33 can penetrate between the circumferential fiber layer 31 and the axial fiber layer 32.

[0042] Specifically, in step S300 , the annular fiber layer 31 and the axial fiber layer 32 are respectively multiple layers, and the annular fiber layer 31 and the axial fiber layer 32 are alternately arranged.

[0043] Specifically, in step S300, along the axis and in the direction from the top to the bottom, the wall layers of the FRP tank are sequentially divided into a plurality of layer structures with increasing thickness. Through the above arrangement, the wall thickness of the FRP tank can be reasonably designed, which can not only ensure the strength of the FRP tank, but also save the number of circumferential fiber layers 31 and axial fiber layers 32 required for manufacturing the FRP tank at the position of the upper part of the FRP tank where excessive strength is not required, thereby improving economic performance.

[0044] More specifically, refer to Figure 2 In this embodiment, along the axis and in the direction from the top to the bottom, the wall ply of the FRP tank is divided into a first ply structure, a second ply structure, a third ply structure, a fourth ply structure, a fifth ply structure and a sixth ply structure with increasing thickness layer by layer. Among them, the first structural layer 301 in the first ply structure includes a circumferential fiber layer 31, an interlayer bonding layer 33 and an axial fiber layer 32 arranged in sequence along the radial direction of the FRP tank and away from the transition layer 20. The second structural layer 302 in the second ply structure includes a circumferential fiber layer 31, an interlayer bonding layer 33, an axial fiber layer 32 and a circumferential fiber layer 31 arranged in sequence along the radial direction of the FRP tank and away from the transition layer 20. The third structural layer 303 in the third ply structure includes a circumferential fiber layer 31, an interlayer bonding layer 33, an axial fiber layer 32, a circumferential fiber layer 31, an interlayer bonding layer 33 and an axial fiber layer 32 arranged in sequence along the radial direction of the FRP tank and away from the transition layer 20. The fourth structural layer 304 in the fourth ply structure includes a circumferential fiber layer 31, an interlayer bonding layer 33, an axial fiber layer 32, a circumferential fiber layer 31, an interlayer bonding layer 33, an axial fiber layer 32, and a circumferential fiber layer 31, which are sequentially arranged along the radial direction of the FRP tank and away from the transition layer 20. The fifth structural layer 305 in the fifth ply structure includes a circumferential fiber layer 31, an interlayer bonding layer 33, an axial fiber layer 32, a circumferential fiber layer 31, an interlayer bonding layer 33, an axial fiber layer 32, an interlayer bonding layer 33, and a circumferential fiber layer 31, which are sequentially arranged along the radial direction of the FRP tank and away from the transition layer 20. The sixth structural layer 306 in the sixth layup structure includes an annular fiber layer 31, an interlayer bonding layer 33, an axial fiber layer 32, annular fiber layer 31, an interlayer bonding layer 33, an axial fiber layer 32, an interlayer bonding layer 33, an axial fiber layer 32 and annular fiber layer 31 which are arranged in sequence along the radial direction of the FRP tank and away from the transition layer 20.

[0045] It should be noted that along the axis and in the direction from the top to the bottom, the number of layers of the cylinder wall of the FRP storage tank and the number of the circumferential fiber layers 31, the interlayer bonding layers 33 and the axial fiber layers 32 in each layer can be adjusted according to the parameter data in the actual situation, and this embodiment does not limit this. The above parameter data specifically include the diameter, height, design wind pressure and design pressure of the FRP storage tank. When the diameter and height of the FRP storage tank are large, the number of layers of the cylinder wall of the FRP storage tank needs to be increased accordingly; when the design wind pressure and design pressure of the FRP storage tank are large, the number of the circumferential fiber layers 31, the interlayer bonding layers 33 and the axial fiber layers 32 in each layer needs to be increased accordingly.

[0046] Preferably, the axial fiber layer 32 is made of unidirectional cloth, the interlayer bonding layer 33 is made of chopped fibers, and the circumferential fiber layer 31 is made of winding yarn. Through the above arrangement, the problem of incomplete fiber leakage between the circumferential fiber layer 31 and the axial fiber layer 32 during the manufacturing process of the cylinder wall of the FRP storage tank can be solved.

[0047] Continue to refer to Figure 1 After step S300, the following steps are also performed:

[0048] Step S400, a finishing layer is provided on the outer layer of the structural layer 30, the finishing layer can cover the structural layer 30 and flatten the grooves of the structural layer 30. In this embodiment, the finishing layer is specifically made of low-weight mesh cloth, which is used to tighten the outermost layer of the structural layer 30 and flatten the fiber grooves of the structural layer 30.

[0049] This embodiment also provides a FRP storage tank, the cylinder wall of which is manufactured using the FRP storage tank cylinder wall laying method provided in this embodiment.

[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for laying the wall of a glass fiber reinforced plastic storage tank, characterized in that: include: S100, winding an inner lining layer (10) on the surface of a mold (2); S200, after the inner lining layer (10) is solidified, a transition layer (20) is formed on the side of the inner lining layer (10) facing away from the mold (2); S300, a structural layer (30) is manufactured on the side of the transition layer (20) facing away from the inner lining layer (10), wherein the structural layer (30) comprises an annular fiber layer (31), an axial fiber layer (32) and an interlayer bonding layer (33), wherein the annular fiber layer (31) is formed by winding fibers along the circumference of the mold (2), and the axial fiber layer (32) is formed by laying fibers along the axial direction of the mold (2), and the interlayer bonding layer (33) is capable of penetrating between the annular fiber layer (31) and the axial fiber layer (32).

2. The method for laying layers of the glass fiber reinforced plastic tank wall according to claim 1 is characterized in that: In step S300, the annular fiber layer (31) and the axial fiber layer (32) are respectively multiple layers, and the annular fiber layer (31) and the axial fiber layer (32) are alternately arranged.

3. The method for laying layers of the glass fiber reinforced plastic tank wall according to claim 2 is characterized in that: In step S300, along the axis and in the direction from the top to the bottom, the wall ply of the FRP storage tank is divided into a plurality of ply structures with increasing thickness layer by layer.

4. The method for laying layers of the glass fiber reinforced plastic tank wall according to claim 1, characterized in that: After step S300, the following steps are also performed: S400, a finishing layer is arranged on the outer layer of the structural layer (30), wherein the finishing layer can cover the structural layer (30) and flatten the grooves of the structural layer (30).

5. The method for laying layers on the wall of a glass fiber reinforced plastic storage tank according to any one of claims 1 to 4, characterized in that: The axial fiber layer (32) is made of unidirectional cloth, the interlayer bonding layer (33) is made of short-cut fibers, and the circumferential fiber layer (31) is made of winding yarn.

6. The method for laying layers of a glass fiber reinforced plastic tank wall according to any one of claims 1 to 4, characterized in that: The inner lining layer (10) is made of glass fiber chopped strand mat and / or glass fiber surface mat.

7. Fiberglass storage tank, characterized in that: The cylinder wall of the FRP storage tank is manufactured by the FRP storage tank cylinder wall laying method as described in any one of claims 1-6.

8. Winding equipment, characterized in that The winding device is used based on the fiberglass reinforced plastic tank wall laying method according to any one of claims 1 to 6, and the winding device includes: A support platform (1), a mold (2) and a fiber winding device (3), wherein the mold (2) is arranged on the support platform (1) so as to be rotatable around its own axis, and the fiber winding device (3) is arranged on the side of the mold (2), and the fiber winding device (3) can drive the fiber to reciprocate along the axial direction of the mold (2).

9. The winding device according to claim 8, characterized in that The winding device also includes a control system (4), which is arranged on the supporting platform (1), and the rotation drive device (5) of the mold (2) and the fiber winding device (3) are respectively communicatively connected to the control system (4), and the control system (4) can control the rotation drive device (5) and the fiber winding device (3) according to program settings.

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