A processing technology and product of fiber-plastic reinforced composite winding pipe

Abstract

A processing technology for a fiber-plastic reinforced composite wound pipe and its product, the processing technology includes the following steps: step 1, heating and melting the pipe raw material to form a plate strip; step 2, spirally winding and connecting the plate strip to form a pipe body; step 3, heating and melting the connecting layer raw material and laying it on the outer surface of the pipe body to form a connecting layer; step 4, opening a reinforcement structure on the connecting layer; step 5, winding the fiber mesh on the connecting layer; step 6, heating and melting the reinforcing material and wrapping it on the connecting layer, so that it is combined with the fiber mesh to form a fiber reinforcement layer on the pipe body; step 7, finally cooling and forming to obtain a fiber-plastic reinforced composite wound pipe. The present invention first combines the pipe body and the connecting layer into a pipe body, and arranges a reinforcement structure on the connecting layer that makes it difficult for the fiber reinforcement layer to fall off the pipe body. The production process of this structure is simple and fast, with low production cost, and greatly improves the corrosion and oxidation resistance of the pipe body, as well as increases the rigidity, strength, and impact resistance.

Description

Technical Field

[0001] The present invention relates to a pipeline structure, in particular to a processing technology of a fiber-plastic reinforced composite winding pipe and a product thereof. Background Art

[0002] Spiral wound pipes are widely used due to their corrosion resistance, lightweight, easy installation, high flow capacity, and long service life. However, existing spiral wound pipes lack strength and cannot meet the requirements of specialized environments. Manufacturers have addressed this issue by wrapping the outer wall of the pipe with a fiber-reinforced layer to enhance its strength. However, the connection between the existing fiber-reinforced layer and the pipe body is unstable, and the fiber-reinforced layer easily falls off the spiral wound pipe. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a processing technology for a fiber-plastic reinforced composite wound pipe and a product thereof.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A processing technology for fiber-plastic reinforced composite winding pipe, characterized by comprising the following steps:

[0006] Step 1: Heat and melt the pipe material, pour it into the mold, and cool it to form a strip;

[0007] Step 2: spirally winding the strips to form the pipe body;

[0008] Step 3: Heat and melt the connecting layer material and spread it on the outer surface of the pipe body. Then, use a smoothing roller to smooth the pipe material on the outer surface of the pipe body to form a connecting layer.

[0009] Step 4: A reinforcement structure is formed on the outer surface of the connecting layer. The reinforcement structure includes a plurality of first connecting areas and a plurality of second connecting areas staggered and distributed on the outer surface of the tube body. The first connecting areas are provided with a plurality of inclined grooves 1, and the second connecting areas are provided with a plurality of inclined grooves 2. The grooves 1 and 2 are inclined in opposite directions.

[0010] Step 5, preparing a fiber web and winding the fiber web on the outer surface of the connecting layer;

[0011] Step 6: Heat and melt the reinforcing material and wrap it on the outer surface of the connecting layer with the fiber mesh, then apply pressure to make the reinforcing material adhere to the outer surface of the connecting layer, and partially embed the reinforcing material into the grooves 1 and 2;

[0012] Step seven: finally cooling and molding, so that the reinforcing material and the fiber mesh are combined to form a fiber reinforcement layer, completing the processing of the fiber-plastic reinforced composite winding pipe.

[0013] In the present invention, step three and step four are performed simultaneously.

[0014] In the present invention, in step three, the smoothing pressing wheel includes a pressing wheel body, and the pressing wheel body is provided with a groove structure for forming groove one and groove two on the connecting layer.

[0015] In the present invention, in step three, the pipe material and the connecting layer material are the same material, and the pipe material and the connecting layer material are PE, PP or PVC.

[0016] In the present invention, in step 4, the processed multiple first connection areas and / or multiple second connection areas are arranged spirally along the axial direction of the tube body and distributed on the outer surface of the tube body.

[0017] In the present invention, in step 4, at least one second connection region is provided between two first connection regions adjacent to each other along the spiral direction, and / or at least one first connection region is provided between two second connection regions adjacent to each other along the spiral direction.

[0018] In the present invention, in step four, a plurality of first connection areas are annularly arranged along the circumference of the tube body to form a first groove annular array, and a plurality of second connection areas are annularly arranged along the circumference of the tube body to form a second groove annular array.

[0019] In the present invention, in step four, at least one second connection area is provided between two adjacent first connection areas along the circumferential direction of the tube body, or / and at least one first connection area is provided between two adjacent second connection areas along the circumferential direction of the tube body.

[0020] In the present invention, in step six, part of the reinforcing material is filled into the plurality of grooves one and the plurality of grooves two to form the inserting portion one and the inserting portion two located on the inner wall of the fiber reinforced layer.

[0021] A fiber-plastic reinforced composite wound pipe comprises any one of the fiber-plastic reinforced composite wound pipes described above.

[0022] The beneficial effects of the present invention are as follows: the present invention first combines the pipe main body and the connecting layer into a pipe body, and simultaneously arranges an enhancement structure on the connecting layer that can enhance the connection stability between the pipe body and the fiber reinforced layer. When the fiber reinforced layer is partially embedded in groove one and groove two of the reinforcement structure, the fiber reinforced layer is locked by utilizing the relatively inclined design of groove one and groove two, so that the portion of the fiber reinforced layer embedded in groove one and groove two cannot fall out. The production process of this structure is simple and fast, and the production cost is low. It can stably connect the fiber reinforced layer and the pipe body into one, thereby ensuring the stability of the connection between the fiber reinforced layer and the pipe body, making it difficult for the fiber reinforced layer to fall off the pipe body. In this way, while ensuring the service life of the wound pipe, the corrosion and oxidation resistance of the pipe body is greatly improved, and the rigidity, strength and impact resistance are increased, which is suitable for wide promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0024] Figure 1 Schematic diagram of the cross-sectional structure of this embodiment;

[0025] Figure 2 Schematic diagram of the first arrangement structure of the first processing area and the second processing area Figure 1 ;

[0026] Figure 3 Schematic diagram of the first arrangement structure of the first processing area and the second processing area Figure 2 ;

[0027] Figure 4 Schematic diagram of the second arrangement structure of the first processing area and the second processing area Figure 1 ;

[0028] Figure 5 Schematic diagram of the second layout structure of the first processing area and the second processing area Figure 2

[0029] Figure 6 Schematic diagram of the first arrangement structure of the first connection area and the second connection area Figure 1 ;

[0030] Figure 7 Schematic diagram of the first arrangement structure of the first connection area and the second connection area Figure 2 ;

[0031] Figure 8 Schematic diagram of the second arrangement structure of the first connection area and the second connection area Figure 1 ;

[0032] Figure 9 Schematic diagram of the second arrangement structure of the first connection area and the second connection area Figure 2 ;

[0033] Figure 10 Schematic diagram of the socket layout structure. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0035] Reference Figure 1 A processing technology for fiber-plastic reinforced composite winding pipe includes the following steps:

[0036] Step 1: Prepare pipe raw materials. The pipe raw materials can be PE, PP or PVC. Heat the pipe raw materials to 150-300°C to melt them, pour them into a mold, and cool them to form a strip. In this embodiment, the pipe raw materials are preferably PE.

[0037] Step 2: Spirally wrap the strips to form the pipe body 1. In addition, the edges of the strips are provided with PE material for connection, which can be formed at the same time as the strips are formed. When connecting, the edges are first heated to 120°C-200°C for splicing. When splicing, a winding press wheel is used to flatten the surface of the splicing. One winding press wheel is pressed on the outside of the connection between the strips, and the other winding press wheel is pressed on the inside of the connection between the strips.

[0038] Step 3: Prepare the raw material for the connecting layer, which can be PE, PP or PVC. Heat and melt the raw material for the connecting layer and spread it on the outer surface of the pipe body 1. Then use the smoothing roller 2 to smooth the pipe material laid on the outer surface of the pipe body 1 to form a connecting layer 3. The connecting layer 3 and the pipe body 1 are combined to form a layered wrapped pipe. When smoothing, the smoothing roller 2 is pressed on the raw material for the connecting layer, and at the same time, an anti-concave pressing roller is pressed on the inner wall of the pipe body 1. The position of the anti-concave pressing roller corresponds to the position of the smoothing roller 2 to prevent the pipe body 1 from being flattened when the smoothing roller 2 smoothes the raw material for the connecting layer.

[0039] Step 4: A plurality of grooves 1 4 and a plurality of grooves 2 5 are formed on the outer surface of the connecting layer 3. The cross sections of each groove 1 4 and each groove 2 5 are inclined relative to each other, with one being straight and the other being reversed. Thus, each groove 1 4 and each groove 2 5 form an inner or outer figure-eight structure, providing a locking force capable of locking the fiber reinforcement layer 7.

[0040] Step 5: Prepare a fiber mesh 6 and wrap the fiber mesh 6 around the outer surface of the connecting layer 3. The fiber mesh 6 can be wrapped with one or more layers on the outer surface of the connecting layer 3 to meet different strength requirements of the winding tube. In addition, to prevent it from spreading before laying the reinforcing material, glue or glass fiber tape can be affixed to the fiber mesh 6 for preliminary fixation. In this embodiment, the fiber mesh 6 is made of a plurality of fiber strips woven vertically and horizontally, and is preferably an alkali-free glass fiber mesh 6 cloth, which has high structural strength and low production cost. Of course, medium-alkali glass fiber mesh 6 cloth or high-alkali glass fiber mesh 6 cloth can also be used.

[0041] Step 6: Prepare the reinforcing material. In this embodiment, the reinforcing material is a resin. After heating the reinforcing material to ℃-℃ and melting it, wrap it on the outer surface of the connecting layer 3 with the fiber mesh 6. Then, press it with a roller to make the surface flat. At the same time, the reinforcing material passes through the grid in the middle of the fiber mesh 6 and adheres to the outer surface of the connecting layer 3. Part of the reinforcing material is embedded in the groove 1 4 and the groove 2 5 of the reinforcing structure.

[0042] Step seven, finally cooling and molding, so that the reinforcing material and the fiber mesh 6 are combined to form a fiber reinforcement layer 7 wrapped on the outer surface of the connecting layer 3, completing the processing of the winding tube.

[0043] As a preferred embodiment, steps 3 and 4 are performed simultaneously to improve production efficiency. Furthermore, the pipe material and the connecting layer material are PE, PP, or PVC. In this embodiment, the connecting layer material is preferably PE. This ensures that the pipe material and the connecting layer material are made of the same material, improving the quality of the connection between the pipe body 1 and the connecting layer 3. Furthermore, the connection between the pipe body 1 and the connecting layer 3 is free of delamination, ensuring the integrity of the connection between the pipe body 1 and the connecting layer 3.

[0044] As a preferred embodiment, in step three, the smoothing pressing wheel 2 includes a pressing wheel body 21 , and the pressing wheel body 21 is provided with a groove structure for forming groove 1 4 and groove 2 5 on the connecting layer 3 . The grooving structure includes a plurality of first working areas 50 and a plurality of second working areas 60 staggered and distributed on the outer circumferential surface of the pressure wheel body 21. The first working area 50 is provided with a plurality of inclined positively inclined protrusions 22, and the second working area 60 is provided with a plurality of inclined reversely inclined protrusions 23. The inclination directions of the positively inclined protrusions 22 and the reversely inclined protrusions 23 are opposite, so that the smoothing pressure wheel 2 can form groove one 4 and groove two 5 on the connecting layer 3 while smoothing the connecting layer raw material, thereby realizing simultaneous processing of step three and step four; in the above structure, the more positively inclined protrusions 22 provided in the first connecting area 10 and the more reversely inclined protrusions 23 provided in the second connecting area 20, the faster the efficiency of processing groove one 4 and groove two 5, and the specific number of positively inclined protrusions 22 and reversely inclined protrusions 23 can be determined according to actual needs.

[0045] As a preferred embodiment, in step three, the plurality of first working areas 50 and the plurality of second working areas 60 can be distributed in two ways. The first distribution way is: Figure 2 and 3As shown in the figure, a plurality of first working areas 50 and / or a plurality of second working areas 60 are arranged in an axial spiral arrangement along the outer circumference of the pressing wheel body 21. When the pipe body 1 moves in a spiral motion to the left or right, the pressing wheel smoothes the pipe material on the pipe body 1 to form a connecting layer 3 wrapped around the pipe body 1. At the same time, the positively inclined protrusions 22 and the reversely inclined protrusions 23 are inserted into the pipe material to form grooves 1 4 and 2 5. Moreover, since the pipe body 1 moves in a spiral motion to the left or right and the connecting layer 3 also has a certain elasticity, it is also convenient for the positively inclined protrusions 22 and the reversely inclined protrusions 23 to be pulled out of grooves 1 4 and 2 5. In addition, at least one second working area 60 is provided between two first working areas 50 adjacent to each other in the spiral direction, and / or at least one first working area 50 is provided between two second working areas 60 adjacent to each other in the spiral direction. Thus, staggered first connecting areas 10 and second connecting areas 20 can be provided on the pipe body to improve the use effect of the reinforcement structure. The second distribution method: as Figures 4 and 5 As shown, several first working areas 50 are arranged in a ring shape along the circumference of the pressure roller body 21 to form a ring array of protrusions, and several second working areas 60 are arranged in a ring shape along the circumference of the pressure roller body 21 to form a second ring array of protrusions. The positively inclined ring array and the reversely inclined ring array are arranged in one or more positions on the outer circumferential surface of the pressure roller body 21 along the axial direction of the pressure roller body 21. At least one second working area 60 is provided between two adjacent first working areas 50 along the circumferential direction of the pressure roller body 21, or / and at least one first working area 50 is provided between two adjacent second working areas 60 along the circumferential direction of the pressure roller body 21, which can also achieve the same purpose.

[0046] As a preferred embodiment, Figures 6 and 7 As shown, in step four, since the connecting layer 3 is laid when the pipe body 1 moves spirally, the first connecting area 10 and the second connecting area 20 processed by the smoothing wheel 2 have the following structure: the processed multiple first connecting areas 10 or / and multiple second connecting areas 20 are spirally arranged along the axial direction of the pipe body and distributed on the outer surface of the pipe body, and at least one second connecting area 20 is provided between two adjacent first connecting areas 10 along the spiral direction or / and at least one first connecting area 10 is provided between two adjacent second connecting areas 20 along the spiral direction. The specific method can be determined according to actual conditions. This method can make each first connecting area 10 and each second connecting area 20 be staggered, which helps to improve the use effect of the reinforced structure.

[0047] Of course, the arrangement structure of multiple first connection areas 10 and multiple second connection areas 20 is not limited to the above structure. The above is only the method adopted in the preferred embodiment. The multiple first connection areas 10 and / or multiple second connection areas 20 are arranged on the pipe body. The structure can also be that multiple first connection areas 10 are arranged in an annular manner along the circumference of the pipe body to form a first groove annular array 30, and multiple second connection areas 20 are arranged in an annular manner along the circumference of the pipe body to form a second groove annular array 40, and the first groove annular array 30 and the second groove annular array 40 are arranged in multiples along the axial direction of the pipe body on the outer surface of the pipe body, which can also enable the reinforcement structure to achieve the same purpose. This arrangement structure is processed when the pipe body 1 rotates at the same position and does not move, such as Figures 8 and 9 In addition, multiple first connection areas 10 and multiple second connection areas 20 can be distributed circumferentially in the same area on the outer surface of the tube body. It is only necessary to stagger the positions of the first connection areas 10 and the second connection areas 20 during the circumferential distribution. That is, when multiple first connection areas 10 and / or multiple second connection areas 20 are arranged in an annular manner along the circumference of the tube body on the outer surface of the tube body, at least one second connection area 20 is provided between two adjacent first connection areas 10 along the circumferential direction of the tube body, and / or at least one first connection area 10 is provided between two adjacent second connection areas 20 along the circumferential direction of the tube body. This method can also ensure that each first connection area 10 and each second connection area 20 are staggered.

[0048] As a preferred embodiment, in step five, a shaping wheel is placed against one end of the tube body, the diameter of the shaping wheel being the same as the diameter of the connecting layer 3, and the fiber mesh 6 is wound around the shaping wheel at the same time; then in step six, the reinforcing material is wrapped around the outer surface of the shaping wheel at the same time, so that one end of the fiber reinforcement layer 7 extends along its length direction and passes over one end of the tube body to form a fiber reinforcement socket 70, so that when two winding tubes are spliced, the other end of the tube body of one winding tube is directly inserted into the fiber reinforcement socket 70 on the other winding tube, as shown in FIG. Figure 10 Of course, the present invention is not limited to the above structure, and the two ends of the winding tube can also be provided with other types of sockets and / or spigots, as long as they achieve the same purpose.

[0049] As a preferred embodiment, in step six, part of the reinforcing material is filled into a number of grooves 1 4 and a number of grooves 2 5 to form a plug-in portion 1 71 and a plug-in portion 2 72 located on the inner wall of the fiber reinforced layer 7. The grooves 1 4 and the grooves 2 5 respectively lock the plug-in portion 1 71 and the plug-in portion 2 72 and form a mutually constrained locking force, effectively preventing the plug-in portion 1 71 and the plug-in portion 2 72 from falling out, thereby avoiding the fiber reinforced layer 7 from falling off.

[0050] like Figure 1As shown, the present invention also provides a fiber-plastic reinforced composite winding pipe, which includes a pipe body and a fiber reinforcement layer 7 wrapped on the outer surface of the pipe body, the pipe body is provided with a reinforcement structure that can enhance the connection stability with the fiber reinforcement layer 7, the reinforcement structure includes a plurality of first connection areas 10 and a plurality of second connection areas 20 staggered and distributed on the outer surface of the pipe body, a plurality of inclined grooves 1 4 are provided in the first connection area 10, and a plurality of inclined grooves 2 5 are provided in the second connection area 20, the inclination directions of the grooves 1 4 and 2 5 are opposite, and the inner wall of the fiber reinforcement layer 7 is partially embedded in the grooves 1 4 and 2 5.

[0051] The above descriptions are merely preferred embodiments of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means shall fall within the scope of protection of the present invention.

Claims

1. A processing technology for fiber-plastic reinforced composite winding pipe, characterized in that The following steps are involved: Step 1: Heat and melt the pipe material, pour it into the mold, and cool it to form a strip; Step 2: spirally winding the strips to form a pipe body (1); Step 3: Heat and melt the connecting layer material and spread it on the outer surface of the pipe body (1), then use a smoothing roller (2) to smooth the pipe material on the outer surface of the pipe body (1) to form a connecting layer (3); Step 4: a reinforcement structure is formed on the outer surface of the connection layer (3), wherein the reinforcement structure comprises a plurality of first connection areas (10) and a plurality of second connection areas (20) staggered and distributed on the outer surface of the tube body, wherein the first connection area (10) is provided with a plurality of inclined grooves 1 (4), and the second connection area (20) is provided with a plurality of inclined grooves 2 (5), wherein the inclined directions of the grooves 1 (4) and the grooves 2 (5) are opposite, and an inner eight-shaped structure or an outer eight-shaped structure is formed between each groove 1 (4) and each groove 2 (5); Step 5: preparing a fiber web (6) and winding the fiber web (6) on the outer surface of the connecting layer (3); Step 6: Heat and melt the reinforcing material and wrap it on the outer surface of the connecting layer (3) with the fiber mesh (6), then apply pressure to make the reinforcing material adhere to the outer surface of the connecting layer (3), and partially embed the reinforcing material into the groove 1 (4) and the groove 2 (5); Step seven, finally cooling and molding, so that the reinforcing material and the fiber mesh (6) are combined to form a fiber reinforcement layer (7), completing the processing of the fiber-plastic reinforced composite winding pipe; In step 4, the processed multiple first connection areas (10) and / or multiple second connection areas (20) are arranged in a spiral arrangement along the axial direction of the tube body and distributed on the outer surface of the tube body, and at least one second connection area (20) is provided between two adjacent first connection areas (10) along the spiral direction, and / or at least one first connection area (10) is provided between two adjacent second connection areas (20) along the spiral direction; Alternatively, in step 4, a plurality of first connection areas (10) are arranged annularly along the circumference of the tube body to form a first groove annular array (30), a plurality of second connection areas (20) are arranged annularly along the circumference of the tube body to form a second groove annular array (40), and at least one second connection area (20) is provided between two adjacent first connection areas (10) in the circumferential direction of the tube body or / and at least one first connection area (10) is provided between two adjacent second connection areas (20) in the circumferential direction of the tube body.

2. The processing technology of the fiber-plastic reinforced composite winding pipe according to claim 1 is characterized in that: Steps 3 and 4 are performed simultaneously.

3. The processing technology of the fiber-plastic reinforced composite winding pipe according to claim 1 is characterized in that: In step three, the smoothing pressing wheel (2) comprises a pressing wheel body (21), and the pressing wheel body (21) is provided with a slotting structure for forming groove one (4) and groove two (5) on the connecting layer (3).

4. The processing technology of the fiber-plastic reinforced composite winding pipe according to claim 1 is characterized in that: In step three, the pipe material and the connecting layer material are the same material, and the pipe material and the connecting layer material are PE, PP or PVC.

5. The processing technology of the fiber-plastic reinforced composite winding pipe according to claim 1 is characterized in that: In step six, part of the reinforcing material is filled into the plurality of grooves one (4) and the plurality of grooves two (5) to form the plug-in portion one (71) and the plug-in portion two (72) located on the inner wall of the fiber reinforced layer (7).

6. A fiber-plastic reinforced composite winding pipe, characterized by: The fiber-plastic reinforced composite winding pipe is processed by the processing technology of any one of claims 1 to 5.

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