A high density composite press molding equipment for glass steel sand clad pipe

Abstract

The present application relates to the technical field of press forming equipment, in particular to a high-density composite press forming equipment for glass steel sand inclusion pipe, which comprises a base, the upper surface of the base is fixedly connected with a bearing seat, the side wall of the bearing seat is fixedly connected with a No.1 motor through a support, the output end of the No.1 motor is fixedly connected with a rotating column, the rotating column penetrates through the side wall of the bearing seat and is rotatably connected with the bearing seat, and the side end of the rotating column is fixedly connected with a connecting cylinder. The thickness sensing assembly arranged in the present application can detect the circumferential wall thickness change of the pipe blank, provide data basis for the self-adaptive adjustment of the equipment, the adjusting assembly arranged in the present application can receive the wall thickness detection electric signal and complete the self-adaptive synchronous equivalent adjustment, and the self-adaptive compaction assembly and the self-adaptive vibration assembly arranged in the present application can self-adaptively adjust the compaction pressure and the vibration frequency according to the pipe thickness parameters detected by the thickness sensing assembly.

Description

Technical Field

[0001] This invention relates to the field of compression molding equipment technology, specifically to a high-density composite compression molding equipment for fiberglass reinforced plastic (FRP) pipes. Background Technology

[0002] Fiberglass reinforced plastic (FRP) pipes are a new type of pipe made of resin as the matrix, glass fiber as the reinforcing material, and quartz sand as the filler aggregate. They have advantages such as high strength, corrosion resistance, light weight, low water resistance, and long service life. They are widely used in municipal water supply and drainage, water conservancy projects, chemical transportation, and farmland irrigation. In the production process of FRP pipes, the pipe blank compaction process directly determines the pipe density, wall thickness uniformity, structural strength, and seepage prevention performance. It is the core process to ensure the quality of the finished pipe.

[0003] Traditional fiberglass reinforced plastic (FRP) pipe molding equipment has a simple structure, mostly using fixed rollers to compact the pipe blank. However, this method has several technical drawbacks in actual production. Traditional compaction equipment cannot detect changes in pipe blank wall thickness in real time, nor can it adaptively adjust the compaction stroke and spacing based on differences in pipe blank forming. This easily leads to problems such as insufficient compaction in certain areas, uneven wall thickness, and localized voids and looseness, resulting in poor consistency in pipe density. Furthermore, traditional equipment relies solely on single roller extrusion molding without an auxiliary vibration compaction structure, resulting in insufficient filling of sand, resin, and fiber inside the pipe blank, easily creating micropores and reducing the pipe's structural strength and impermeability. In addition, the compaction structure of traditional molding equipment has poor stability, easily causing radial offset and swaying during rotary compaction, further affecting pipe forming accuracy and finished product qualification rate. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a high-density composite pressing molding device for fiberglass reinforced plastic (FRP) pipes, which effectively solves the problems of existing technologies being unable to detect the pipe blank wall thickness in real time, lacking adaptive adjustment functions, and failing to achieve integrated operation of detection, adjustment, compaction, and vibration.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) sand-filled pipes, including a base, a bearing seat fixedly connected to the upper surface of the base, a No. 1 motor fixedly connected to the side wall of the bearing seat via a bracket, a rotating column fixedly connected to the output end of the No. 1 motor, the rotating column being rotatably connected through the side wall of the bearing seat, a connecting cylinder fixedly connected to the side end of the rotating column, and a rotating seat fixedly connected to the side wall of the connecting cylinder.

[0007] An adaptive compaction mechanism includes a thickness sensing component, multiple adjustment components, multiple adaptive compaction components, multiple adaptive vibration components, and a stabilizing component. The thickness sensing component is signal-linked with each adjustment component, which can detect the wall thickness of the tube blank and output a detection electrical signal. The adjustment components adaptively adjust the working stroke and spacing according to the detection signal. The adaptive compaction components are fixedly installed at the output end of the adjustment components, move synchronously with the adjustment components, and adaptively conform to the outer wall of the tube blank to complete flexible extrusion compaction. The adaptive vibration components are fixedly installed inside the adaptive compaction components and work synchronously and collaboratively with the adaptive compaction components to assist in the dense filling of materials through vibration.

[0008] According to the above-mentioned high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) pipes, the thickness sensing component includes a first-shaped plate fixedly connected to the side wall of a rotating seat. A variable resistance rod is fixedly installed on the inner wall of the first-shaped plate. A conductive ring is slidably sleeved on the variable resistance rod. A moving block is fixedly connected to the outer wall of the conductive ring. Two first-shaped guide rods are fixedly connected to the side wall of the moving block. Both first-shaped guide rods are slidably connected through the side wall of the first-shaped plate. A mounting base is fixedly connected to the side end of the two first-shaped guide rods. A sensing roller is rotatably connected inside the mounting base. Two first-shaped springs are fixedly connected between the mounting base and the side wall of the first-shaped plate. A PLC controller is fixedly installed on the side wall of the bearing seat.

[0009] According to the above-mentioned high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) sand-filled pipes, a second motor is fixedly connected to the inner wall of the connecting cylinder via a bracket, a rotating shaft is fixedly connected to the output end of the second motor, the side end of the rotating shaft is rotatably connected to the inner wall of the rotating seat via a bearing, and a first bevel gear is fixedly connected to the circumference of the rotating shaft.

[0010] According to the above-mentioned high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) sand-filled pipes, the adjusting component includes a second bevel gear disposed inside a connecting cylinder, the second bevel gear meshing with a first bevel gear, an adjusting threaded rod disposed inside the connecting cylinder, the adjusting threaded rod being rotatably connected to the side wall of the connecting cylinder through a bearing, the second bevel gear being fixedly connected to the end of the adjusting threaded rod, a first guide groove being formed on the inner wall of the rotating seat, a connecting block being slidably connected in the first guide groove, a nut being threadedly connected to the adjusting threaded rod, the connecting block being fixedly connected to the side wall of the nut, and the side end of the adjusting threaded rod being rotatably connected to the annular inner wall of the rotating seat through a bearing.

[0011] According to the above-mentioned high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) pipes, the adaptive compaction component includes a second C-shaped plate fixedly connected to the side wall of the connecting block. An electric push rod is fixedly installed on the upper surface of the second C-shaped plate. The output end of the electric push rod penetrates the inner top surface of the second C-shaped plate, and a moving plate is fixedly connected to the output end of the electric push rod. Limiting grooves are opened on both side walls of the second C-shaped plate. Limiting blocks are slidably connected in both limiting grooves. A third C-shaped plate is fixedly connected between the two limiting blocks. A compaction roller is rotatably installed in the third C-shaped plate. Multiple second springs are fixedly connected between the third C-shaped plate and the moving plate.

[0012] According to the above-mentioned high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) pipes, the adaptive vibration assembly includes two vibration components. Each vibration component includes a No. 4 C-shaped plate fixedly connected to the upper surface of a movable plate. A No. 3 motor is fixedly connected to the inner wall of the No. 4 C-shaped plate via a bracket. An L-shaped striking block is provided inside the No. 4 C-shaped plate. Two No. 2 guide rods are fixedly connected to the upper surface of the L-shaped striking block, and both No. 2 guide rods are slidably connected through the upper surface of the No. 4 C-shaped plate. Two No. 3 springs are fixedly connected between the upper surface of the L-shaped striking block and the inner top surface of the No. 4 C-shaped plate. A cam is fixedly connected to the output end of the No. 3 motor, and the cam rolls in contact with the inner top surface of the L-shaped striking block. A through groove is formed on the upper surface of the No. 2 C-shaped plate, and the No. 4 C-shaped plate passes through the through groove.

[0013] According to the above-mentioned high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) pipes, the stabilizing component includes a first annular seat fixedly connected to the upper surface of the base. The side wall of the first annular seat is provided with a T-shaped annular groove. An annular T-plate is slidably connected in the T-shaped annular groove. A second annular seat is fixedly connected to the side wall of the annular T-plate. The side wall of the second annular seat is provided with multiple second guide grooves. Sliding columns are slidably connected in each of the multiple second guide grooves. The multiple sliding columns are respectively fixedly connected to the side walls of the multiple second T-shaped plates.

[0014] According to the above-mentioned high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) sand-filled pipes, the variable resistance rod, conductive ring, motor 1, motor 2, motor 3, and electric push rod are all electrically connected to the PLC controller. The spring 1 and spring 3 are respectively sleeved on the guide rod 1 and guide rod 2. Multiple adjustment components, adaptive compaction components, and adaptive vibration components are all equidistantly arranged around the center of the rotating seat.

[0015] The technical solution provided by this invention has the following advantages compared with the known prior art:

[0016] 1. The present invention, through the thickness sensing component, can fit against the outer wall of the fiberglass reinforced sand pipe blank in real time during the molding process, thereby detecting the circumferential wall thickness change of the pipe blank. It outputs a precise electrical signal through variable resistance sensing, providing data basis for the adaptive adjustment action of the equipment, thereby realizing closed-loop intelligent control of the molding process.

[0017] 2. The present invention, through the set adjustment component, can receive the wall thickness detection electrical signal and complete the adaptive synchronous equal amount adjustment, adjust the compaction operation stroke and radial spacing, realize the synchronous and uniform control of multiple points in the circumferential direction of the tube blank, effectively improve the defects of insufficient local compaction and uneven wall thickness in the pipeline, thereby improving the consistency of tube blank forming.

[0018] 3. The present invention, through the adaptive compaction component, can adaptively adjust the compaction pressure according to the tube thickness parameter detected by the thickness sensing component. The greater the tube wall thickness, the greater the extension stroke of the electric push rod, and the greater the compression of the No. 2 spring, thus increasing the compaction pressure. The smaller the tube wall thickness, the smaller the extension stroke of the electric push rod, the smaller the spring compression, and the lower the compaction pressure. Relying on the precise stroke control of the electric push rod and the elastic storage structure of the No. 2 spring, adaptive pressure compaction matching the wall thickness is achieved. It can adaptively conform to the slight curvature and unevenness deviation of the outer wall of the tube blank, avoiding the tube blank deformation, skin damage, local overpressure or compaction gaps caused by traditional rigid extrusion.

[0019] 4. This invention, through its adaptive vibration component, can work synchronously and collaboratively with the compaction operation. The vibration frequency can be adaptively adjusted according to the pipe wall thickness. The thicker the pipe wall, the higher the operating frequency of the cam driven by the No. 3 motor, resulting in a stronger high-frequency vibration effect. This helps to fully fill the aggregate in thick-walled areas and eliminate deep pores. Conversely, the thinner the pipe wall, the adaptively lower vibration frequency avoids deformation and aggregate displacement of the thin-walled pipe blank caused by high-frequency vibration. Through wall thickness-matched variable frequency vibration, it effectively promotes the full flow and filling of quartz sand, resin, and glass fiber aggregate inside the pipe blank, quickly expelling tiny air bubbles and voids generated during the molding process. This significantly reduces the pipe porosity and substantially improves the overall density, structural strength, and anti-seepage and corrosion resistance of the fiberglass reinforced plastic (FRP) pipe.

[0020] 5. The present invention, through the setting of stabilizing components, can form a closed-loop ring-shaped limiting support system with the circumferentially equidistant compaction structure. This effectively counteracts the radial impact and vibration forces generated during dynamic adjustment of compaction pressure, high-frequency variable frequency vibration, and rotation, preventing eccentric swaying and radial offset of the compaction mechanism. It ensures the stable and synchronous operation of multiple compaction structures throughout the process, guarantees the molding stability under different wall thicknesses, different compaction pressures, and different vibration frequencies, improves the overall operational stability and molding accuracy of the equipment, and extends the service life of the equipment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the present invention;

[0024] Figure 3 This is a three-dimensional structural schematic diagram of the adaptive compaction mechanism of the present invention;

[0025] Figure 4 This is a three-dimensional structural diagram of the thickness sensing component of the present invention;

[0026] Figure 5 This is a three-dimensional structural diagram of the adaptive compaction component and the adaptive vibration component of the present invention;

[0027] Figure 6 This is an exploded view of the stabilizing component of the present invention;

[0028] Figure 7 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 8 for Figure 3 Enlarged view of point B in the middle;

[0030] Figure 9 for Figure 3 Enlarged view of point C in the middle.

[0031] Reference numerals: 1. Base; 11. Bearing seat; 12. Motor No. 1; 13. Rotating column; 14. Connecting cylinder; 15. Rotating seat; 16. Motor No. 2; 17. Rotating shaft; 18. Bevel gear No. 1; 2. Thickness sensing component; 21. I-shaped plate No. 1; 22. Variable resistance rod; 23. Conductive ring; 24. Moving block; 25. Guide rod No. 1; 26. Mounting seat; 27. Sensing roller; 28. Spring No. 1; 29. ​​PLC controller; 3. Adjustment component; 31. Bevel gear No. 2; 32. Adjusting threaded rod; 33. Guide groove No. 1; 34. Connecting block; 35. Nut 4. Adaptive compaction assembly; 41. No. 2 C-shaped plate; 42. Electric push rod; 43. Moving plate; 44. Limiting groove; 45. Limiting block; 46. No. 3 C-shaped plate; 47. Compacting roller; 48. No. 2 spring; 5. Adaptive vibration assembly; 51. No. 4 C-shaped plate; 52. No. 3 motor; 53. L-shaped striking block; 54. No. 2 guide rod; 55. No. 3 spring; 56. Cam; 57. Through groove; 6. Stabilizing assembly; 61. No. 1 annular seat; 62. T-shaped annular groove; 63. Annular T-plate; 64. No. 2 annular seat; 65. No. 2 guide groove; 66. Sliding column. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] The present invention will be further described below with reference to embodiments.

[0034] Example: Refer to Figures 1 to 9 A high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) sand-filled pipes includes a base 1, a bearing seat 11 fixedly connected to the upper surface of the base 1, a first motor 12 fixedly connected to the side wall of the bearing seat 11 via a bracket, a rotating column 13 fixedly connected to the output end of the first motor 12, the rotating column 13 being rotatably connected to the side wall of the bearing seat 11, a connecting cylinder 14 fixedly connected to the side end of the rotating column 13, and a rotating seat 15 fixedly connected to the side wall of the connecting cylinder 14.

[0035] The adaptive compaction mechanism includes a thickness sensing component 2, multiple adjustment components 3, multiple adaptive compaction components 4, multiple adaptive vibration components 5, and a stabilizing component 6. The thickness sensing component 2 is linked with each adjustment component to detect the wall thickness of the tube blank and output a detection electrical signal. The adjustment components 3 adaptively adjust the working stroke and spacing according to the detection signal. The adaptive compaction components 4 are fixedly installed at the output end of the adjustment components 3, move synchronously with the adjustment components 3, and adaptively conform to the outer wall of the tube blank to complete flexible extrusion compaction. The adaptive vibration components 5 are fixedly installed inside the adaptive compaction components 4 and work synchronously and collaboratively with the adaptive compaction components 4 to assist in the dense filling of materials through vibration.

[0036] The thickness sensing component 2 includes a first-order C-shaped plate 21 fixedly connected to the side wall of the rotating seat 15. A variable resistance rod 22 is fixedly installed on the inner wall of the first-order C-shaped plate 21. A conductive ring 23 is slidably sleeved on the variable resistance rod 22. A moving block 24 is fixedly connected to the outer wall of the conductive ring 23. Two first-order guide rods 25 are fixedly connected to the side wall of the moving block 24. Both first-order guide rods 25 are slidably connected through the side wall of the first-order C-shaped plate 21. A mounting base 26 is fixedly connected to the side end of the two first-order guide rods 25. A sensing roller 27 is rotatably connected inside the mounting base 26. Two first-order springs 28 are fixedly connected between the mounting base 26 and the side wall of the first-order C-shaped plate 21. A PLC controller 29 is fixedly installed on the side wall of the bearing seat 11.

[0037] The inner wall of the connecting cylinder 14 is fixedly connected to a second motor 16 via a bracket. The output end of the second motor 16 is fixedly connected to a rotating shaft 17. The side end of the rotating shaft 17 is rotatably connected to the inner wall of the rotating seat 15 via a bearing. A first bevel gear 18 is fixedly connected to the circumference of the rotating shaft 17.

[0038] The adjusting assembly 3 includes a second bevel gear 31 located inside the connecting cylinder 14, which meshes with a first bevel gear 18. An adjusting threaded rod 32 is provided inside the connecting cylinder 14. The adjusting threaded rod 32 is rotatably connected to the side wall of the connecting cylinder 14 through a bearing. The second bevel gear 31 is fixedly connected to the end of the adjusting threaded rod 32. A first guide groove 33 is provided on the inner wall of the rotating seat 15. A connecting block 34 is slidably connected in the first guide groove 33. A nut 35 is threaded onto the adjusting threaded rod 32. The connecting block 34 is fixedly connected to the side wall of the nut 35. The side end of the adjusting threaded rod 32 is rotatably connected to the annular inner wall of the rotating seat 15 through a bearing.

[0039] The adaptive compaction assembly 4 includes a second C-shaped plate 41 fixedly connected to the side wall of the connecting block 34. An electric push rod 42 is fixedly installed on the upper surface of the second C-shaped plate 41. The output end of the electric push rod 42 passes through the inner top surface of the second C-shaped plate 41, and a moving plate 43 is fixedly connected to the output end of the electric push rod 42. Limiting grooves 44 are opened on both side walls of the second C-shaped plate 41. Limiting blocks 45 are slidably connected in both limiting grooves 44. A third C-shaped plate 46 is fixedly connected between the two limiting blocks 45. A compaction roller 47 is rotatably installed in the third C-shaped plate 46. Multiple second springs 48 are fixedly connected between the third C-shaped plate 46 and the moving plate 43.

[0040] The adaptive vibration assembly 5 includes two vibration components, both of which are fixedly mounted on the upper surface of the movable plate 43 and located on either side of the electric push rod 42. Each vibration component includes a fourth-shaped C-shaped plate 51 fixedly connected to the upper surface of the movable plate 43. A third-shaped motor 52 is fixedly connected to the inner wall of the fourth-shaped C-shaped plate 51 via a bracket. An L-shaped striking block 53 is provided inside the fourth-shaped C-shaped plate 51. Two second-shaped guide rods 54 are fixedly connected to the upper surface of the L-shaped striking block 53. Both second-shaped guide rods 54 are slidably connected through the upper surface of the fourth-shaped C-shaped plate 51. Two [unclear text - possibly a number] are fixedly connected between the upper surface of the L-shaped striking block 53 and the inner top surface of the fourth-shaped C-shaped plate 51. The output end of the No. 3 spring 55 and the No. 3 motor 52 is fixedly connected to the cam 56. The cam 56 rolls in contact with the inner top surface of the L-shaped striking block 53. The upper surface of the No. 2 C-shaped plate 41 is provided with a through groove 57. The No. 4 C-shaped plate 51 passes through the through groove 57. The variable resistance rod 22, the conductive ring 23, the No. 1 motor 12, the No. 2 motor 16, the No. 3 motor 52 and the electric push rod 42 are all electrically connected to the PLC controller 29. The No. 1 spring 28 and the No. 3 spring 55 are respectively sleeved on the No. 1 guide rod 25 and the No. 2 guide rod 54. Multiple adjustment components 3, adaptive compaction components 4 and adaptive vibration components 5 are all equidistantly arranged around the center of the rotating seat 15.

[0041] The stabilizing component 6 includes a first annular seat 61 fixedly connected to the upper surface of the base 1. The side wall of the first annular seat 61 is provided with a T-shaped annular groove 62. An annular T-plate 63 is slidably connected in the T-shaped annular groove 62. A second annular seat 64 is fixedly connected to the side wall of the annular T-plate 63. A plurality of second guide grooves 65 are provided on the side wall of the second annular seat 64. A sliding column 66 is slidably connected in each of the plurality of second guide grooves 65. The plurality of sliding columns 66 are respectively fixedly connected to the side walls of the plurality of second C-shaped plates 41.

[0042] The working principle of this invention is as follows: This invention uses PLC controller 29 as the core control, and relies on the coordinated linkage of thickness sensing component 2, adjustment component 3, adaptive compaction component 4, adaptive vibration component 5, and stabilization component 6 to enable the equipment to dynamically match the three major process parameters of compaction pressure, compaction stroke, and vibration frequency according to the real-time wall thickness of the tube blank. This overcomes the defects of inconsistent forming quality in thick and thin areas, internal loose pores, tube wall deformation, and uneven wall thickness caused by fixed parameter compaction in traditional equipment, and achieves uniform, high-density, and high-precision forming of fiberglass reinforced plastic (FRP) sand-filled tubes throughout the entire area.

[0043] Before the formal forming operation of the equipment, the fiberglass reinforced sand pipe blank to be processed is first stably supported by the external pushing device and inserted into the center of the equipment, so that the pipe blank body passes through the central through hole of the first ring seat 61 and the second ring seat 64. After the pipe blank is assembled, the outer wall is precisely against the inner working area of ​​multiple sets of horizontally arranged compaction rollers 47, so as to achieve the overall coaxial centering of the pipe blank.

[0044] Wall thickness detection and initial alignment adjustment: After the billet pre-assembly and bearing assembly are completed, the equipment enters the adjustment mode. At this time, motor 12 is not started, and the entire compaction mechanism does not revolve. The equipment first completes the wall thickness detection and self-adaptive alignment and bonding of the compaction roller 47. After the assembly is stable, the thickness sensing component 2 starts working. Spring 28 continuously pushes the mounting base 26, so that the sensing roller 27 is in close contact with the outer wall of the billet to detect the outer wall thickness of the billet. When the billet wall thickness is too large, the sensing roller 27 is pushed outward, driving the guide rod 25. The moving block 24 moves outward synchronously, causing the conductive ring 23 to slide on the surface of the variable resistance rod 22. When the tube wall thickness is too small, the first spring 28 rebounds and resets, driving the induction roller 27 to move inward with the tube wall. Through the relative sliding of the conductive ring 23 and the variable resistance rod 22, the equipment can change the resistance value of the circuit in real time, thereby outputting an analog electrical signal corresponding to the tube wall thickness and transmitting it to the PLC controller 29 in real time to complete the acquisition of the tube wall thickness data before forming, providing accurate data support for subsequent multi-mechanism synchronous adaptive adjustment.

[0045] Multiple sets of circumferential synchronous adaptive fitting and positioning: After receiving the wall thickness detection electrical signal, the PLC controller 29 outputs the control command to start the No. 2 motor 16 and enter the adaptive alignment adjustment process. The No. 2 motor 16 drives the rotating shaft 17 to rotate synchronously with the No. 1 bevel gear 18. Through precise gear meshing transmission, it synchronously drives all the No. 2 bevel gears 31 and corresponding adjusting thread rods 32 that are circumferentially equidistant to rotate synchronously, at equal angles and in equal amounts. During the synchronous rotation of multiple sets of adjusting thread rods 32, it drives each set of nuts 35 and connecting blocks 34 to move precisely radially along the No. 1 guide groove 33, and synchronously drives the multiple sets of adaptive compaction components 4 to move radially as a whole. According to the current overall specifications of the tube blank, the radial position of each set of compaction rollers 47 is uniformly adjusted so that the multiple sets of transversely arranged compaction rollers 47 move closer or further away from each other synchronously, adaptively adapting to the overall outer diameter and wall thickness of the tube blank. Finally, all compaction rollers 47 are uniformly, tightly, and without gaps attached to the outer circumferential wall of the tube blank, completing the multi-roller synchronous alignment and encirclement positioning operation.

[0046] Wall thickness-linked adaptive pressure adjustment and shaping: After the compaction roller 47 completes circumferential synchronous bonding and positioning, the equipment continues to rely on the wall thickness signal of the thickness sensing component 2 to complete the adaptive adjustment of the compaction pressure. The PLC controller 29, based on the collected wall thickness information and combined with the overall thickness specifications of the different tube blanks being processed, specifically controls the extension and retraction stroke of the electric push rod 42 of each set of adaptive compaction components 4, to achieve adaptive matching of different compaction pressures for different tube blank specifications. For thicker tube blanks with larger overall wall thickness, the extension stroke of the electric push rod 42 is increased, pushing the moving plate 43 to move downwards a greater distance, fully compressing the second spring 48, accumulating greater elastic extrusion force, matching the high-pressure compaction and shaping requirements of thick-walled tube blanks, and ensuring the internal structure of the thick-walled tube blanks. The material is fully compacted and deep pores are eliminated. For thin-sized tube blanks with smaller overall wall thickness, the electric push rod 42 automatically reduces the extension stroke, reduces the compression of the second spring 48, and reduces the compaction pre-pressure. This effectively avoids molding defects such as overall deformation, resin overflow, aggregate displacement, and tube wall depression caused by excessive pressure on thin-walled tube blanks. At the same time, the limiting groove 44 and the limiting block 45 ensure that the compaction roller 47 has a stable posture and accurate alignment. Combined with the flexible buffering characteristics of the second spring 48, the compaction roller 47 adapts to the slight curvature and concave and convex deviations of the outer wall of the tube blank, and completes the static pressure adaptive adjustment for tube blanks of different thicknesses. This lays a uniform, accurate, and appropriate pressure foundation for subsequent dynamic revolution compaction.

[0047] Vibration compaction and revolution compaction operations: After all the above-mentioned processes of wall thickness detection, adaptive fitting and alignment of compaction rollers 47, and adaptive adjustment of compaction pressure are completed, and the circumferential compaction parameters of the tube blank are fully matched and finalized, the equipment can start motor 12 to enter the forming operation mode. Motor 12 drives the rotating column 13, connecting cylinder 14, and rotating seat 15 to perform a uniform circumferential revolution around the tube blank, driving multiple sets of compaction rollers 47 and vibration components to smoothly rotate and compact along the outer wall of the tube blank. During continuous roller pressing, the PLC controller 29 matches the corresponding operating frequency of motor 52 based on the current overall wall thickness specification of the tube blank obtained from previous detection, for larger overall wall thicknesses. For thick-walled tube blanks, the equipment uses high-frequency micro-vibration to promote the full flow and filling of deep sand, resin, and glass fiber throughout the tube blank, quickly expelling the micro-air bubbles deep within the tube wall and ensuring the overall density of the thick-walled tube blank. For thin-walled tube blanks with even smaller overall wall thickness, the equipment uses low-frequency soft vibration. While ensuring the overall surface density of the tube wall, it effectively avoids forming defects such as bulging, delamination, deformation, and aggregate displacement caused by high-frequency vibration. The variable frequency vibration parameters are matched with the overall wall thickness of the tube blank and the adaptive flexible compaction pressure, and are synchronously superimposed throughout the process, significantly reducing the overall porosity of tube blanks of different specifications and comprehensively improving the uniform forming quality and structural uniformity of various types of fiberglass reinforced plastic (FRP) pipes.

[0048] Annular closed-loop stabilizing anti-deviation forming: Throughout the entire process of equipment revolution compaction, dynamic pressure adjustment, and frequency conversion vibration compaction, the stabilizing component 6 provides closed-loop annular limit support to ensure stable equipment operation. Multiple compaction operation structures slide in conjunction with the sliding column 66 and the second guide groove 65, moving synchronously with the second annular seat 64. At the same time, the annular T-plate 63 slides smoothly along the T-shaped annular groove 62 of the first annular seat 61. This structure can effectively reduce the radial vibration force, eccentric impact force, and torsional force generated by dynamic compaction pressure switching, high-frequency vibration, revolution, and eliminate problems such as radial deviation, eccentric swaying, and local shaking during the revolution of the compaction mechanism. In addition, with the structural advantage of multiple sets of adaptive compaction components 4 with equidistant centers, the working trajectory, compaction posture, and running stability of each set of compaction rollers 47 are relatively consistent, ensuring uniform stress and process parameters throughout the circumference of the tube blank, effectively improving the roundness, wall thickness uniformity, and overall forming accuracy of the pipe, significantly reducing the product defect rate, and ensuring long-term continuous and stable production of the equipment.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) pipes, characterized in that, include: A base (1) is fixedly connected to a support seat (11) on its upper surface. A first motor (12) is fixedly connected to the side wall of the support seat (11) via a bracket. A rotating column (13) is fixedly connected to the output end of the first motor (12). The rotating column (13) is rotatably connected to the side wall of the support seat (11). A connecting cylinder (14) is fixedly connected to the side end of the rotating column (13). A rotating seat (15) is fixedly connected to the side wall of the connecting cylinder (14). The adaptive compaction mechanism includes a thickness sensing component (2), multiple adjustment components (3), multiple adaptive compaction components (4), multiple adaptive vibration components (5), and a stabilizing component (6). The thickness sensing component (2) is linked with each adjustment component to detect the wall thickness of the tube blank and output a detection electrical signal. The adjustment component (3) adaptively adjusts the working stroke and spacing according to the detection signal. The adaptive compaction component (4) is fixedly installed at the output end of the adjustment component (3), moves synchronously with the adjustment component (3), and adaptively fits the outer wall of the tube blank to complete flexible extrusion compaction. The adaptive vibration component (5) is fixedly installed inside the adaptive compaction component (4) and works synchronously and collaboratively with the adaptive compaction component (4) to assist the material filling and compaction through vibration.

2. The high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) pipes according to claim 1, characterized in that, The thickness sensing component (2) includes a first-order C-shaped plate (21) fixedly connected to the side wall of the rotating seat (15). A variable resistance rod (22) is fixedly installed on the inner wall of the first-order C-shaped plate (21). A conductive ring (23) is slidably sleeved on the variable resistance rod (22). A moving block (24) is fixedly connected to the outer wall of the conductive ring (23). Two first-order guide rods (25) are fixedly connected to the side wall of the moving block (24). Both first-order guide rods (25) are slidably connected through the side wall of the first-order C-shaped plate (21). A mounting seat (26) is fixedly connected to the side end of the two first-order guide rods (25). A sensing roller (27) is rotatably connected inside the mounting seat (26). Two first-order springs (28) are fixedly connected between the mounting seat (26) and the side wall of the first-order C-shaped plate (21). A PLC controller (29) is fixedly installed on the side wall of the bearing seat (11).

3. The high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) pipes according to claim 2, characterized in that, The inner wall of the connecting cylinder (14) is fixedly connected to a second motor (16) via a bracket. The output end of the second motor (16) is fixedly connected to a rotating shaft (17). The side end of the rotating shaft (17) is rotatably connected to the inner wall of the rotating seat (15) via a bearing. A first bevel gear (18) is fixedly connected to the circumference of the rotating shaft (17).

4. The high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) pipes according to claim 3, characterized in that, The adjusting assembly (3) includes a second bevel gear (31) disposed in the connecting cylinder (14), the second bevel gear (31) meshing with a first bevel gear (18), an adjusting threaded rod (32) disposed in the connecting cylinder (14), the adjusting threaded rod (32) being rotatably connected to the side wall of the connecting cylinder (14) through a bearing, the second bevel gear (31) being fixedly connected to the end of the adjusting threaded rod (32), a first guide groove (33) being opened on the inner wall of the rotating seat (15), a connecting block (34) being slidably connected in the first guide groove (33), a nut (35) being threadedly connected to the adjusting threaded rod (32), the connecting block (34) being fixedly connected to the side wall of the nut (35), and the side end of the adjusting threaded rod (32) being rotatably connected to the annular inner wall of the rotating seat (15) through a bearing.

5. The high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) pipes according to claim 4, characterized in that, The adaptive compaction assembly (4) includes a second C-shaped plate (41) fixedly connected to the side wall of the connecting block (34). An electric push rod (42) is fixedly installed on the upper surface of the second C-shaped plate (41). The output end of the electric push rod (42) passes through the inner top surface of the second C-shaped plate (41), and a moving plate (43) is fixedly connected to the output end of the electric push rod (42). Limiting grooves (44) are opened on both side walls of the second C-shaped plate (41). Limiting blocks (45) are slidably connected in both limiting grooves (44). A third C-shaped plate (46) is fixedly connected between the two limiting blocks (45). A compaction roller (47) is rotatably installed in the third C-shaped plate (46). Multiple second springs (48) are fixedly connected between the third C-shaped plate (46) and the moving plate (43).

6. The high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) pipes according to claim 5, characterized in that, The adaptive vibration assembly (5) includes two vibration components. Each vibration component includes a No. 4 C-shaped plate (51) fixedly connected to the upper surface of the movable plate (43). A No. 3 motor (52) is fixedly connected to the inner wall of the No. 4 C-shaped plate (51) via a bracket. An L-shaped striking block (53) is provided inside the No. 4 C-shaped plate (51). Two No. 2 guide rods (54) are fixedly connected to the upper surface of the L-shaped striking block (53). Both No. 2 guide rods (54) slide through the plate. Two No. 3 springs (55) are fixedly connected between the upper surface of the L-shaped striking block (53) and the inner top surface of the No. 4 C-shaped plate (51), and the output end of the No. 3 motor (52) is fixedly connected to a cam (56). The cam (56) rolls in contact with the inner top surface of the L-shaped striking block (53). A through groove (57) is opened on the upper surface of the No. 2 C-shaped plate (41), and the No. 4 C-shaped plate (51) passes through the through groove (57).

7. The high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) pipes according to claim 5, characterized in that, The stabilizing component (6) includes a first annular seat (61) fixedly connected to the upper surface of the base (1). The first annular seat (61) has a T-shaped annular groove (62) on its side wall. An annular T-plate (63) is slidably connected in the T-shaped annular groove (62). A second annular seat (64) is fixedly connected to the side wall of the annular T-plate (63). A plurality of second guide grooves (65) are opened on the side wall of the second annular seat (64). A sliding column (66) is slidably connected in each of the plurality of second guide grooves (65). The plurality of sliding columns (66) are respectively fixedly connected to the side walls of the plurality of second C-shaped plates (41).

8. A high-density composite pressing molding equipment for fiberglass reinforced plastic (FRP) pipes according to claim 6, characterized in that, The variable resistance rod (22), conductive coil (23), motor 1 (12), motor 2 (16), motor 3 (52) and electric push rod (42) are all electrically connected to the PLC controller (29). The spring 1 (28) and spring 3 (55) are respectively sleeved on the guide rod 1 (25) and guide rod 2 (54). Multiple adjustment components (3), adaptive compaction components (4) and adaptive vibration components (5) are equidistantly arranged around the center of the rotating seat (15).

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