Pultrusion plate processing system and method

Abstract

The invention discloses a pultrusion plate processing system and method. The pultrusion plate processing system comprises a rough cleaning device, a fine cleaning device, a drying device, a flame treatment device, a resin coating station and a conveying device. A plate is sequentially conveyed to the primary washing device, the fine washing device, the drying device, the flame treatment device, the resin coating station and the curing device through a conveying line of the conveying device, the surface of the glass fiber reinforced epoxy resin pultrusion plate is cleaned through distilled water and ethyl alcohol, and after it is guaranteed that the surface is completely dried, the surface of the pultrusion plate is treated through flames; and finally, epoxy resin is used for protecting the surface. The method can achieve the purpose of enhancing the interlayer bonding strength of the pultrusion plates in the prefabricated pultrusion girder of the large-size wind power blade, and has the advantages that the treatment speed is high, the efficiency is high, the surface damage of the plates is small, the device is simple and feasible, the operation is convenient, and the method is suitable for industrial large-scale production.

Description

Technical Field

[0001] The invention relates to the technical field of composite material production equipment, and in particular to a pultruded plate processing system and method. Background Art

[0002] As a pollution-free clean energy, wind energy has many advantages such as large reserves and wide distribution. Wind power generation has also become one of the most representative green energy sources due to its rapid development. Large-scale wind turbines are an important path to reduce costs and increase efficiency of wind power, and it is also an established trend in the development of the industry. In order to improve the efficiency of wind power generation and higher energy conversion rate, the prefabricated pultruded beam secondary vacuum infusion molding process is currently mainly used to prepare the blade main beam to meet the large-scale requirements.

[0003] The typical prefabricated pultruded beam secondary vacuum infusion molding process is to splice several pultruded plates in the chord direction and stack them in the thickness direction to achieve the width and thickness required by the blade structure design. During the stacking process, interlayer glass fiber fabric is laid between the pultruded plate layers, and the whole is subjected to secondary vacuum infusion molding after stacking. Compared with the full-size vacuum infusion molding process of traditional blades, the prefabricated pultruded beam secondary vacuum infusion molding process is simpler, has a higher material utilization rate, fewer product defects, and has a higher fiber content, specific strength and specific modulus, which is conducive to the large-scale and lightweight blades.

[0004] Glass fiber reinforced epoxy resin pultruded sheet is a composite material continuous sheet formed by continuous glass fiber being fully impregnated with resin and fully heated and cured in a mold. Under the premise of ensuring the smoothness of the mold channel, a release agent is generally used to ensure the continuity of the pulling process. This results in a smooth surface of the pultruded sheet and a high content of release agent, which affects the interlayer strength after infusion molding and greatly reduces the service life of the blade, so it must be surface treated. The common processing technologies at present are mainly release cloth process and manual polishing. The release cloth process has the problems of low efficiency and high cost, and manual polishing has the disadvantages of dust pollution, unfriendly operation and difficult quality control. Summary of the invention

[0005] The purpose of the present invention is to provide a pultruded sheet processing system and method to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0006] The technical solutions adopted to solve the above technical problems are: The present invention provides a pultruded plate processing system, comprising a preliminary washing device, a fine washing device, a drying device, a flame treatment device, a resin coating station and a conveying device, wherein the conveying device is provided with a preliminary washing station, a fine washing station, a drying station, a flame treatment station, a resin coating station and a curing station in sequence along the conveying direction; the preliminary washing device is arranged at the preliminary washing station, and the preliminary washing device is used to wash the surface of the plate with water; the fine washing device is arranged at the fine washing station, and the fine washing device is used to wash the surface of the plate with a cleaning agent; the drying device is arranged at the drying station, and the flame treatment device is arranged at the flame treatment station, and the flame treatment device is used to treat the surface of the dried plate by flame; the resin coating device is arranged at the resin coating station, and the resin coating station is used to uniformly coat the epoxy resin on the surface of the plate; the curing device is arranged at the curing station, and the curing device is used to heat and cure the resin on the surface of the plate.

[0007] The beneficial effects of the present invention are: The sheet is sequentially transported to the primary washing device, fine washing device, drying device, flame treatment device, resin coating device, and curing device through the conveying line of the conveying device to clean the surface of the glass fiber reinforced epoxy resin pultruded sheet with distilled water and alcohol, and the surface of the pultruded sheet is treated with flame after the surface is completely dried, and finally the surface of the sheet is coated with epoxy resin to protect the surface of the sheet. The invention can achieve the purpose of enhancing the bonding strength between the pultruded sheets in the prefabricated pultruded beams of large-sized wind blades, and has the advantages of fast processing speed, high efficiency, small damage to the sheet surface, simple and easy device, convenient operation, and suitable for large-scale industrial production.

[0008] As a further improvement of the above technical solution, the primary washing device includes a debris cleaning brush head assembly, a distilled water spray assembly, and a secondary cleaning brush head assembly, all of which are equipped with a first lifting drive member. The debris cleaning brush head assembly, the distilled water spray assembly, and the secondary cleaning brush head assembly are arranged in sequence at intervals along the conveying direction of the conveying device, and the first lifting drive member is used to drive the corresponding components to rise and fall.

[0009] The plate is transported to the bottom of the debris cleaning brush head assembly of the primary washing device through the conveying line of the conveying device, and the first lifting drive member drives the debris cleaning brush head assembly to descend. The debris cleaning brush head assembly includes a debris cleaning brush head body and a debris cleaning brush head rotating drive member. The debris cleaning brush head rotating drive member drives the debris cleaning brush head body to rotate to remove dust and other debris on the surface of the plate; then it is transported to the bottom of the distilled water spraying assembly, and the first lifting drive member drives the distilled water spraying assembly to move downward to spray distilled water on the surface of the plate, and then it is transported to the bottom of the secondary cleaning brush head assembly to clean the moisture and water-soluble impurities on the surface of the plate.

[0010] As a further improvement of the above technical solution, the fine washing device includes a cleaning agent spraying assembly, a cleaning brush head assembly and two second lifting drives, each of which is provided with a second lifting drive member, and the second lifting drive members lift and lower the corresponding components respectively.

[0011] The plate is transported to the detergent fine washing device by the conveying device, first arrives under the detergent spraying assembly, the plate is sprayed with detergent, and then is transported to the bottom of the cleaning brush head assembly, and the surface of the plate is cleaned by the cleaning brush head assembly.

[0012] As a further improvement of the above technical solution, the drying device includes a front air outlet assembly and a rear air outlet assembly, and the front air outlet assembly and the rear air outlet assembly both include an air outlet structure, a third lifting drive, a transverse drive, and an air heating structure. The air outlet of the air heating structure is connected to the air outlet structure, the third lifting drive is used to drive the air outlet structure to rise and fall, and the transverse drive is used to drive the air outlet structure to move laterally. The air outlet structure blows hot air to the surface of the plate, and uses the hot air to dry the cleaned plate. When drying, the front air outlet assembly and the rear air outlet assembly move to both sides along the conveying direction respectively, and water flows out from both sides of the plate to improve the drying efficiency.

[0013] As a further improvement of the above technical solution, the flame treatment device includes a flame nozzle provided with a fourth lifting drive member and an information collection device. The fourth lifting drive member is used to drive the flame nozzle to rise and fall. The information collection device includes a height detection sensor and a flame detection sensor. The height detection sensor is used to collect plate height information, and the flame detection sensor is used to collect information on the flame treatment range emitted by the flame nozzle.

[0014] The flame nozzle sprays flames to treat the surface of the plate. At the same time, the position of the outer flame range of the flame is judged by the temperature distribution, range or brightness. According to the height information of the plate, the temperature distribution and range information of the flame, the feedback is calculated in real time, so as to adjust the height of the flame nozzle to ensure that the flame just touches the surface of the plate, thereby improving the efficiency of flame treatment.

[0015] As a further improvement of the above technical solution, the resin coating device includes a resin liquid discharge structure and a uniform coating structure, and the resin liquid discharge structure is provided with a fifth lifting drive member, and the fifth lifting drive member is used to drive the uniform coating structure to rise and fall. The resin flows from the resin liquid discharge structure to the surface of the plate, and the uniform coating structure evenly coats the resin on the plate, and the gap between the uniform coating structure and the plate can be adjusted to achieve the effect of adjusting the coating thickness.

[0016] As a further improvement of the above technical solution, the curing device includes a drying box, a heating device, an air supply device, and a temperature control device. The conveying device passes through the drying box. The heating device and the air supply device are arranged inside the drying box to heat and cure the resin on the surface of the board.

[0017] The present invention also provides a processing method for improving the surface strength of a pultruded plate prefabricated beam, comprising: Use distilled water to clean the surface debris and water-soluble impurities of the glass fiber reinforced extruded sheet; Use anhydrous ethanol to clean the alcohol-soluble impurities on the surface of the plate to be processed; Use hot air to dry the cleaned boards; Surface treatment of the sheet material using flame; Apply the resin evenly on the surface of the board; Heat to cure the resin on the surface of the board.

[0018] The present invention first cleans the surface of the glass fiber reinforced epoxy resin pultruded sheet with distilled water and alcohol, treats the surface of the pultruded sheet with flame after ensuring that the surface is completely dry, and finally uses epoxy resin to protect the surface. The invention can achieve the purpose of enhancing the bonding strength between the pultruded sheets in the prefabricated pultruded beams of large-sized wind blades, and has the advantages of fast processing speed, high efficiency, small damage to the sheet surface, simple and easy device, convenient operation, and suitable for large-scale industrial production.

[0019] As a further improvement of the above technical solution, the step of treating the surface of the plate with flame also includes: According to the height information of the plate and the flame treatment range, the spray height of the flame nozzle is adjusted so that the middle flame of the flame just touches the surface of the plate.

[0020] As a further improvement of the above technical solution, the step of drying the cleaned plate with hot air also includes: The front air outlet assembly and the rear air outlet assembly are controlled to move horizontally from the middle of the plate to both sides at the same time, and the movement speed of the front air outlet assembly and the rear air outlet assembly is greater than the movement speed of the plate, so that the moisture in the center of the plate is blown out to both sides, thereby improving the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments; Figure 1 It is a schematic structural diagram of a pultruded plate processing system provided by the present invention, including a primary washing device, a fine washing device, and a drying device in one embodiment; Figure 2 It is a schematic structural diagram of a pultruded sheet material processing system provided by the present invention, including a flame treatment device, a resin coating device, and a curing device in one embodiment; Figure 3 The present invention provides a flow chart of a method for improving the surface strength of a prefabricated beam of a pultruded plate.

[0022] Reference numerals: The primary washing device 100, the debris cleaning brush head assembly 110, the distilled water spraying assembly 120, the secondary cleaning brush head assembly 130, the first lifting drive member 140, the fine washing device 200, the cleaning agent spraying assembly 210, the cleaning brush head assembly 220, the second lifting drive member 230, the drying device 300, the front air outlet assembly 310, the air outlet structure 311, the third lifting drive member 312, the transverse driving member 313, the rear air outlet assembly 320, the flame treatment device 400, the flame nozzle 410, the information collection device 420, the fourth lifting drive member 430, the resin coating device 500, the resin liquid outlet structure 510, the uniform coating structure 520, the fifth lifting drive member 530, the curing device 600, the drying box 610, the temperature control device 620, the fan 630, and the conveying device 700. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the workstation or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In the description of the present invention, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] Using flame treatment technology, high-temperature flames can quickly remove the release agent on the surface of the sheet and introduce new or increase the content of existing oxygen-containing polar groups through a violent oxidation reaction, thereby enhancing adhesion and helping the coating to adhere firmly to the surface of the sheet and not fall off easily. However, since the flame temperature is generally high, a detailed technical route needs to be specified, otherwise it may cause other damage to the sheet, thereby affecting the overall quality.

[0028] Reference Figures 1 to 3 The present invention provides a pultruded sheet processing system and method, and makes the following embodiments: In some embodiments, a pultruded sheet processing system includes a preliminary washing device 100, a fine washing device 200, a drying device 300, a flame treatment device 400, a resin coating device 500 and a conveying device 700, wherein the conveying device 700 is provided with a preliminary washing station, a fine washing station, a drying station, a flame treatment station, a resin coating station and a curing station in sequence along the conveying direction; the preliminary washing device 100 is provided at the preliminary washing station, and the preliminary washing device is used to use water to wash the surface of the sheet; the fine washing device 200 is provided at the fine washing station, and the fine washing device 200 is used to use a cleaning agent to wash the surface of the sheet; the drying device 300 is provided at the drying station, and the drying device 300 is used to dry the surface of the sheet; the flame treatment device 400 is provided at the flame treatment station, and the flame treatment device 400 is used to treat the surface of the dried sheet by flame; the resin coating device 500 is provided at the resin coating station, and the resin coating station is used to evenly coat the epoxy resin on the surface of the sheet; the curing device 600 is provided at the curing station, and the curing device 600 is used to heat and cure the resin on the surface of the sheet.

[0029] The sheet material is sequentially transported to the primary washing device 100, the fine washing device 200, the drying device 300, the flame treatment device 400, the resin coating device 500, and the curing device 600 through the conveying line of the conveying device 700 to clean the surface of the glass fiber reinforced epoxy resin pultruded sheet material with distilled water and alcohol, and the surface of the pultruded sheet material is treated with a flame after the surface is completely dry, and finally the epoxy resin is used to protect the surface. The use of flame treatment technology to treat the sheet material can improve the surface activity of the sheet material, enhance the surface adhesion of the sheet material, and facilitate the coating to be firmly attached to the surface of the sheet material and not easy to fall off. Therefore, the invention can achieve the purpose of enhancing the bonding strength between the pultruded sheet layers in the prefabricated pultruded beams of large-sized wind blades, and has the advantages of fast processing speed, high efficiency, small damage to the sheet surface, simple and easy device, convenient operation, and suitable for large-scale industrial production.

[0030] Specifically, the conveying device 700 adopts a belt conveying structure, which is provided with a conveyor belt. It can also adopt roller conveying, chain conveying, or other conveying structures that can realize material movement.

[0031] The sheet material enters the primary washing station via a conveyor belt, and the primary washing device 100 uses distilled water to clean the sundries and water-soluble impurities on the surface of the pultruded sheet material.

[0032] The primary washing device 100 includes a debris cleaning brush head assembly 110, a distilled water spraying assembly 120, and a secondary cleaning brush head assembly 130, each of which is provided with a first lifting drive member 140. The debris cleaning brush head assembly 110, the distilled water spraying assembly 120, and the secondary cleaning brush head assembly 130 are arranged at intervals along the conveying direction. The three first lifting drives 140 are used to drive the debris cleaning brush head assembly 110, the distilled water spraying assembly 120, and the secondary cleaning brush head assembly 130 to rise and fall respectively. The debris cleaning brush head assembly 110, the distilled water spraying assembly 120, and the secondary cleaning brush head assembly 130 are arranged at intervals along the conveying direction of the conveying device 700. When the plate is conveyed to the bottom of the corresponding assembly in turn, the first lifting drive member 140 drives the corresponding assembly to move downward for cleaning or spraying distilled water.

[0033] The first lifting drive member 140 can adopt a linear drive unit such as an oil cylinder, an air cylinder, a linear module, etc. and set a corresponding slide rail to improve the movement accuracy.

[0034] The debris cleaning brush head assembly 110 includes a debris cleaning brush head body and a debris cleaning brush head rotating drive member. The debris cleaning brush head rotating drive member drives the debris cleaning brush head body to drive the bristles to rotate to remove dust and other debris on the surface of the plate. The debris cleaning brush head rotating drive member includes a rotating motor. Similarly, the secondary cleaning brush head assembly 130 includes a secondary cleaning brush head body and a secondary cleaning brush head rotating member. The secondary cleaning brush head rotating member drives the secondary cleaning brush head body to rotate and drives the bristles to clean the moisture and water-soluble impurities on the surface of the plate.

[0035] The distilled water spray assembly 120 includes a distilled water nozzle, and of course, a water pipe, a control valve, a distilled water storage chamber and a water pump are also required. The water pipe is connected to the distilled water nozzle and the distilled water storage chamber respectively, and the water pump transports distilled water from the storage chamber to the distilled water nozzle through the water pipe.

[0036] After the plate is transported to the primary washing device 100 through the conveying line of the conveying device 700, it first comes to the bottom of the debris cleaning brush head assembly 110, and the first lifting drive 140 drives the debris cleaning brush head assembly 110 to descend, and the debris cleaning brush head rotation drive drives the debris cleaning brush head body to rotate to remove dust and other debris on the surface of the plate; then it is transported to the bottom of the distilled water spraying assembly 120, and the first lifting drive 140 drives the distilled water spraying assembly 120 to move downward, and the water pump starts to spray distilled water on the surface of the plate, and then it is transported to the bottom of the secondary cleaning brush head assembly 130, and the secondary cleaning brush head body rotates to drive the bristles to clean the moisture and water-soluble impurities on the surface of the plate, and clean the moisture and water-soluble impurities on the surface of the plate. Cleaning impurities helps the resin on the surface of the plate to adhere.

[0037] The plate is conveyed along the conveyor belt out of the primary washing station and enters the fine washing station. The fine washing device 200 uses anhydrous ethanol to clean the alcohol-soluble impurities on the surface of the glass fiber reinforced epoxy resin pultruded plate to be processed.

[0038] The fine washing device 200 includes a detergent spraying assembly 210 and a cleaning brush head assembly 220. The detergent spraying assembly 210 and the cleaning brush head assembly 220 are respectively provided with corresponding second lifting driving members 230 for lifting and lowering, and can move up and down under the drive of the second lifting driving member 230. The detergent spraying assembly 210 is similar in structure to the distilled water spraying assembly 120. The liquid sprayed by the detergent is a detergent. The detergent is a detergent that can dissolve fat-soluble impurities such as oil stains on the surface of the plate and is miscible with water, such as ethanol, acetone, xylene, etc. In this embodiment, ethanol is used. Ethanol is a commonly used organic solvent with good solubility and can dissolve many fat-soluble impurities, such as grease, fat-soluble stains, etc. The structure of the second lifting driving member 230 is also similar to that of the first lifting driving member 140. It uses linear driving units such as oil cylinders, air cylinders, and linear modules and sets corresponding slide rails to improve the movement accuracy.

[0039] The plate is transported to the fine cleaning station by the transport device 700 , and first arrives under the cleaning agent spraying assembly 210 , where the plate is sprayed with cleaning agent, and then is transported to under the cleaning brush head assembly 220 , where the surface of the plate is cleaned.

[0040] The plate is conveyed along the conveyor belt out of the fine washing station and enters the drying station, where the drying device 300 uses hot air to dry the cleaned plate.

[0041] The drying device 300 includes a front air outlet assembly 310 and a rear air outlet assembly 320, and the front air outlet assembly 310 and the rear air outlet assembly 320 are arranged at intervals along the conveying direction. The front air outlet assembly 310 and the rear air outlet assembly 320 both include an air outlet structure 311, a third lifting drive component 312, an air heating structure and a transverse driving component 313. The air heating structure is used to heat the air, and the air outlet of the air heating structure is connected to the air outlet structure 311. The third lifting drive component 312 is used to drive the air outlet structure 311 to rise and fall, and the transverse driving component 313 is used to drive the air outlet structure 311 to move laterally.

[0042] The shape of the air outlet structure 311 can be adapted to the width of the plate. When the air outlet moves left and right on the upper surface of the plate, it can blow to the surface of the plate in a larger range. The third lifting drive member 312 can adopt a linear drive unit such as an oil cylinder, an air cylinder, a linear module, and set a corresponding slide rail to improve the movement accuracy. The transverse drive member 313 can also adopt a linear drive unit such as an oil cylinder, an air cylinder, a linear module, and set a corresponding slide rail to improve the movement accuracy. The air heating structure is provided with a heating cavity and a heating element. The heating element heats the air in the heating cavity. The air in the heating cavity is transported to the air outlet to achieve the purpose of drying the surface of the plate. After the air is heated by the heating structure, it is discharged through the air outlet.

[0043] There are multiple ways of drying. In the first way of drying, when the plate is transported by the conveying device to the bottom of the front air outlet component 310 and the rear air outlet component 320, the third lifting drive component 312 drives the air outlet structure 311 to move down to a place closer to the surface of the plate. The front air outlet component 310 and the rear air outlet component 320 are driven by the transverse drive component 313 to move to both sides of the two plates respectively. There is more moisture on the surface of the plate. The two air outlet structures 311 move from the center of the plate to both sides respectively. The central moisture can flow out to both sides better, thereby improving the drying efficiency. When the front air outlet component 310 and the rear air outlet component 320 cannot blow the plate, the transverse drive component 313 drives the front air outlet component 310 and the rear air outlet component 320 to move back along the conveying direction, and blows hot air to the surface of the plate repeatedly to ensure that the water is blown dry.

[0044] In the second drying method, the plate is transported to the drying station along the conveyor belt. When the plate completely enters the drying station, the front air outlet component 310 and the rear air outlet component 320 are moved to the center of the plate. At this time, the front air outlet component 310 is driven by the transverse driving component 313 to move in the opposite direction of the conveying direction of the plate to blow air to the plate. The rear air outlet component 320 is driven by the transverse driving component 313 to move in the conveying direction of the plate to blow air to the plate. The moving speeds of the front air outlet component 310 and the rear air outlet component 320 are both greater than the conveying speed of the conveyor belt. When the front air outlet component 310 and the rear air outlet component 320 cannot blow to the plate, the front air outlet component 310 and the rear air outlet component 320 stop blowing air and are driven by the transverse driving component 313 again. The front air outlet assembly 310 is driven to move to the center of the plate and starts blowing air. At the same time, the front air outlet assembly 310 is driven by the transverse driving member 313 to move in the opposite direction of the conveying direction of the plate to blow air to the plate. The rear air outlet assembly 320 is driven by the transverse driving member 313 to move along the conveying direction of the plate to blow air to the plate. The plate is blown reciprocatingly, and each time the air is blown from the center of the plate to both sides to improve the drying efficiency. Until the plate is conveyed out of the drying station by the conveying assembly, the front air outlet assembly 310 and the rear air outlet assembly 320 blow air from both sides of the plate to guide the water flow to move to both sides of the plate without pausing the conveying of the plate. The two air outlets move from the center of the plate to both sides respectively, and the central moisture can flow out to both sides better to improve the drying efficiency.

[0045] The plate is conveyed out of the drying device 300 along the conveyor belt and enters the flame treatment device 400, where the surface of the plate is treated by flame.

[0046] The flame treatment device 400 includes a flame nozzle 410, an information collection device 420 and a fourth lifting drive 430. The fourth lifting drive 430 is used to drive the flame nozzle 410 to rise and fall. The flame nozzle 410 is connected to the fuel pipe. The nozzle is provided with an igniter and a control valve. The control valve controls the on and off of the gas, and the igniter ignites the nozzle. The information collection device 420 includes a height detection sensor and a flame detection sensor. The height detection sensor is used to collect information about the height of the plate, and the flame detection sensor is used to collect information about the flame treatment range emitted by the flame nozzle 410. The height detection sensor can be a laser range finder, an ultrasonic sensor or a contact sensor such as a mechanical limit switch. Laser and ultrasonic sensors have the characteristics of non-contact, high precision and fast response, and are suitable for dynamic measurement of plate height. The type of flame detection sensor is an infrared sensor or a thermal imaging sensor, which can sense the temperature distribution and range of the flame. In addition, a photosensitive sensor may also be used to detect the brightness of the flame. The outer flame range of the flame is determined by the temperature distribution, range or brightness, and the height information of the plate, the temperature distribution and range information of the flame are calculated and fed back in real time, so as to adjust the height of the flame nozzle 410 to ensure that the flame just touches the surface of the plate, thereby improving the flame treatment efficiency. When there is a curved surface on the surface of the plate, the flame can also better treat the surface of the plate.

[0047] The plate is conveyed out of the flame treatment device 400 along the conveyor belt and enters the resin coating device 500, where the epoxy resin is evenly coated on the surface of the plate.

[0048] The resin coating device 500 includes a resin liquid outlet structure 510, a uniform coating structure 520 and a fifth lifting drive member 530. The fifth lifting drive member 530 is used to drive the uniform coating structure 520 to rise and fall. The uniform coating structure 520 includes a roller and a fixed seat. The roller is rotatably arranged on the fixed seat, and the roller can easily and evenly coat the glue on the surface of the plate. And the contact gap between the roller and the plate can be controlled in conjunction with the fifth lifting drive member 530 to control the thickness of the resin on the surface of the plate. In other embodiments, a flat brush can also be used, which is suitable for scenes where the position and amount of glue coating need to be precisely controlled. The bristles of the row brush are usually hard and neatly arranged, which can ensure the accuracy and consistency of glue coating. The resin liquid discharge structure 510 includes a resin tank, a slot-shaped funnel and a liquid discharge controller. The slot-shaped funnel is arranged below the resin tank. The liquid outlet of the slot-shaped funnel is in the shape of a long strip. The liquid discharge controller includes a block arranged at the liquid outlet of the slot-shaped funnel and a cylinder driving the block to move. When liquid discharge is required, the cylinder drives the block to move away from the liquid outlet of the slot-shaped funnel. When liquid discharge stops, the cylinder drives the block to seal the liquid outlet of the slot-shaped funnel. The resin tank is provided with a heat preservation structure and a heating structure to ensure good flow properties of the resin without solidification. At the same time, the resin tank, the slot-shaped funnel and the surface of the roller should have a replaceable protective film. The slot-shaped funnel is fixed on the resin coating device 500 by the resin tank, and the slot-shaped funnel can transfer the fast-curing resin in the resin tank to the surface of the plate. The fifth lifting drive component can adopt a linear drive unit such as an oil cylinder, an air cylinder, a linear module, etc. and set a corresponding slide rail to improve the movement accuracy.

[0049] The plate is conveyed out of the resin coating device 500 along the conveyor belt and enters the curing device 600 to heat and cure the resin on the surface of the plate.

[0050] The curing device 600 includes a drying box 610, a heating device and an air supply device, and a temperature control device 620. The conveying device 700 passes through the drying box 610, and the heating device and the air supply device are arranged inside the drying box 610. The temperature control device 620 is used to control and adjust the temperature, speed, time and other parameters of the curing device 600. The temperature control device 620 usually includes equipment such as a temperature sensor, a timer, a frequency converter, and intelligent management equipment such as an operation panel and a PLC controller. The temperature control device 620 can achieve accurate control and optimization of the drying process, thereby improving the drying efficiency and quality. The air supply device includes two air blowers 630, and the air outlets of the two air blowers 630 are respectively arranged on both sides of the drying box 610, and the two air outlets are arranged in an upper and lower staggered manner, which is conducive to the air blower 630 to promote air convection in the drying box 610 to ensure uniform temperature in the curing device 600. The temperature sensing position can be adjusted, generally 2 to 3 mm away from the resin on the surface of the board.

[0051] It should be noted that in order to determine the descending range of each component, each processing station of the present invention has a sensor for measuring the height of the plate, and each station can also perform various processing on the plate when the conveying of the plate is suspended.

[0052] In some other implementations, the flame treatment device 400 uses a butane flame and controls the butane flow rate to 5L / min. The information acquisition and processing equipment collects and calculates and then adjusts the flame nozzle 410 so that the flame just contacts the surface of the plate. The effective length of the flame treatment along the conveyor belt direction is 2.5cm, and the conveyor belt movement rate is 15cm / s. The same fast-curing epoxy resin as the pultruded plate is used in the resin tank of the resin coating device 500. The connecting rod is adjusted to control the gap between the roller and the plate to 2mm, so as to obtain a completely treated glass fiber reinforced epoxy resin pultruded plate.

[0053] The untreated plates and the plates treated according to the process were used to prepare specimens according to the secondary vacuum infusion molding process of the prefabricated pultruded beam. The superiority of the present invention was judged by the tensile shear strength, type I interlaminar fracture toughness of the DCB composite material and type II fracture toughness of the ENF composite material. The final results showed that this method could improve the tensile shear strength by 22.44%, the type I fracture toughness between the composite layers by 21.84% and the type II fracture toughness between the composite layers by 78.36%.

[0054] The present invention also provides an embodiment of a method for improving the surface strength of a pultruded plate prefabricated beam, comprising the following steps: Step S1: Clean the surface of the board with distilled water to remove debris and water-soluble impurities; Specifically, the plate is conveyed into the primary washing station by the conveyor belt, and the debris cleaning brush head assembly 110 moves downward under the drive of the first lifting drive member 140, so that the debris cleaning brush head contacts the surface of the plate, and the debris cleaning brush head rotating drive member drives the debris cleaning brush head body to drive the bristles to rotate to remove dust and other debris on the surface of the plate, and the plate continues to move forward, and the entire surface of the plate can be cleaned; then, the plate moves to the bottom of the distilled water spraying assembly 120 under the movement of the conveyor belt, and the distilled water spraying assembly 120 moves downward under the drive of the first lifting drive member 140, and the distilled water spray head sprays distilled water to the plate, and the plate continues to move along the conveying direction during the water spraying process; the plate continues to move to the bottom of the secondary cleaning brush head assembly 130, and the secondary cleaning brush head assembly 130 moves downward under the drive of the first lifting drive member 140, so that the secondary cleaning brush head body contacts the surface of the plate, and the secondary cleaning brush head rotating member drives the secondary cleaning brush head body to rotate to drive the bristles to clean the moisture and water-soluble impurities on the surface of the plate, and during the brushing process, the plate continues to move to the next fine washing station.

[0055] Step S2: using anhydrous ethanol to clean the alcohol-soluble impurities on the surface of the glass fiber reinforced epoxy resin pultruded sheet to be processed; The plate is conveyed to the bottom of the cleaning agent spraying assembly 210 by the conveying belt. The cleaning agent spraying assembly 210 moves downward under the drive of the second lifting drive member 230. The spray head of the cleaning agent spraying assembly 210 sprays the cleaning agent, anhydrous ethanol, on the surface of the plate. During the spraying process, the plate continues to move. The plate continues to move to the bottom of the cleaning brush head assembly 220. The cleaning agent spraying assembly 210 moves downward under the drive of the second lifting drive member 230, so that the brush head of the cleaning agent spraying assembly 210 contacts the surface of the plate. The rotating part of the cleaning agent spraying assembly 210 drives the brush head, and the bristles are driven by rotation to clean the fat-soluble impurities such as oil stains on the surface of the plate. At the same time, ethanol and water are miscible, which can take away the residual moisture on the plate more quickly. During the scrubbing process, the plate continues to move.

[0056] Step S3: using hot air to dry the cleaned pultruded sheet, controlling the front air outlet assembly 310 and the rear air outlet assembly 320 to move laterally from the middle of the sheet to both sides at the same time, so that the moisture in the center of the sheet is blown out to both sides; The sheet enters the drying station under the conveyance of the conveyor belt. When the sheet completely enters the drying station, the front air outlet assembly 310 and the rear air outlet assembly 320 both move to the center of the sheet. At this time, the front air outlet assembly 310 moves in the opposite direction of the conveying direction of the sheet under the drive of the transverse driving member 313 to blow air to the sheet. The rear air outlet assembly 320 moves in the conveying direction of the sheet under the drive of the transverse driving member 313 to blow air to the sheet. The moving speeds of the front air outlet assembly 310 and the rear air outlet assembly 320 are both greater than the conveying speed of the conveyor belt. When the front air outlet assembly 310 and the rear air outlet assembly 320 cannot blow air to the sheet, the front air outlet assembly 310 and the rear air outlet assembly 320 stop blowing air and move again under the drive of the transverse driving member 313. Move to the center of the plate and start blowing again. At the same time, the front air outlet component 310 moves in the opposite direction of the conveying direction of the plate under the drive of the transverse driving member 313 to blow air to the plate. The rear air outlet component 320 moves in the conveying direction of the plate under the drive of the transverse driving member 313 to blow air to the plate. The plates are blown reciprocatingly in sequence, and each time the air is blown from the center of the plate to both sides to improve the drying efficiency, until the plate is transported out of the drying station by the transmission belt. The front air outlet component 310 and the rear air outlet component 320 blow air from both sides of the plate to guide the water flow to move to both sides of the plate, and there is no need to stop conveying the plate. The two air outlets move from the center of the plate to both sides respectively, and the central moisture can flow out better to both sides, thereby improving the drying efficiency. In another implementation, the front air outlet component 310 and the rear air outlet component 320 can also maintain the air outlet state when moving horizontally to the left and right.

[0057] Step S4: Use flame to perform surface treatment on the glass fiber reinforced epoxy resin pultruded sheet. During the treatment, the spray height of the flame nozzle 410 is adjusted according to the height information of the sheet and the flame treatment range so that the middle flame of the flame just touches the surface of the extruded sheet.

[0058] When the plate moves to the bottom of the flame spray head under the conveyor belt, the information collection device 420 sends a command to the fourth lifting drive 430 based on the plate height information detected by the height detection sensor and the information of the flame treatment range emitted by the flame spray head 410. The flame spray head moves to a proper distance from the plate surface under the drive of the fourth lifting drive 430, so that the middle flame position of the flame just contacts the plate surface. During the flame treatment process, the plate continues to move under the action of the conveyor belt.

[0059] Step S5: evenly coating the epoxy resin on the surface of the board; The plate is moved to the bottom of the resin discharge structure 510 under the conveyance of the transmission belt. The resin discharge structure 510 discharges liquid to the plate. The plate is continuously moved to the bottom of the uniform coating structure 520. The uniform coating structure 520 moves downward under the drive of the fifth lifting drive member 530, and the position of the roller is determined according to the required resin thickness to coat the surface of the plate. The plate continues to move during the process of discharge and coating.

[0060] Step S6: Heat and solidify the resin on the surface of the board. The board is transported by the transmission belt and moved into the drying box 610. The heating device and the air supply device are started to dry the board.

[0061] The present invention first cleans the surface of the glass fiber reinforced epoxy resin pultruded sheet with distilled water and alcohol, treats the surface of the pultruded sheet with flame after ensuring that the surface is completely dry, and finally uses epoxy resin to protect the surface. The invention can achieve the purpose of enhancing the bonding strength between the pultruded sheets in the prefabricated pultruded beams of large-sized wind blades, and has the advantages of fast processing speed, high efficiency, small damage to the sheet surface, simple and easy device, convenient operation, and suitable for large-scale industrial production.

[0062] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A pultruded sheet processing system, characterized in that: include: The conveying device (700) is provided with a primary washing station, a fine washing station, a drying station, a flame treatment station, a resin coating station, and a curing station in sequence along the conveying direction; A primary washing device (100), arranged at the primary washing station, the primary washing device is used to wash the surface of the plate with water; A fine cleaning device (200), arranged at the fine cleaning station, the fine cleaning device (200) being used to clean the surface of the plate using a cleaning agent; A drying device (300), arranged at the drying station, the drying device (300) being used to dry the surface of the plate; A flame treatment device (400) is arranged at the flame treatment station, and the flame treatment device (400) is used to treat the surface of the dried plate by means of flame; A resin coating device (500) is provided at the resin coating station, and the resin coating station is used to evenly coat epoxy resin on the surface of the plate; The curing device (600) is arranged at the curing station, and the curing device (600) is used to heat and cure the resin on the surface of the board.

2. The pultruded sheet material processing system according to claim 1, characterized in that: The primary cleaning device (100) comprises a debris cleaning brush head assembly (110), a distilled water spray assembly (120), and a secondary cleaning brush head assembly (130), each of which is provided with a first lifting drive member (140); the debris cleaning brush head assembly (110), the distilled water spray assembly (120), and the secondary cleaning brush head assembly (130) are sequentially arranged at intervals along the conveying direction of the conveying device (700); and the first lifting drive member (140) is used to drive the corresponding assembly to rise and fall.

3. The pultruded sheet material processing system according to claim 1, characterized in that: The fine washing device (200) comprises a cleaning agent spraying assembly (210), a cleaning brush head assembly (220), and two second lifting driving members (230), each of which is provided with a second lifting driving member (230), wherein the second lifting driving members (230) respectively lift and lower the corresponding assembly.

4. The pultruded sheet material processing system according to claim 1, characterized in that: The drying device (300) comprises a front air outlet component (310) and a rear air outlet component (320), wherein the front air outlet component (310) and the rear air outlet component (320) both comprise an air outlet structure (311), a third lifting drive component (312), a transverse driving component (313) and an air heating structure, wherein the air outlet of the air heating structure is connected to the air outlet structure (311), the third lifting drive component (312) is used to drive the air outlet structure (311) to rise and fall, and the transverse driving component (313) is used to drive the air outlet structure (311) to move laterally.

5. The pultruded sheet material processing system according to claim 1, characterized in that: The flame treatment device (400) comprises a flame spray head (410) provided with a fourth lifting drive member (430), and an information collection device (420), wherein the fourth lifting drive member (430) is used to drive the flame spray head (410) to rise and fall, and the information collection device (420) comprises a height detection sensor and a flame detection sensor, wherein the height detection sensor is used to collect plate height information, and the flame detection sensor is used to collect information on a flame treatment range emitted by the flame spray head (410).

6. The pultruded sheet material processing system according to claim 1, characterized in that: The resin coating device (500) comprises a resin liquid discharge structure (510) and a uniform coating structure (520); the resin liquid discharge structure (510) is provided with a fifth lifting drive component (530); the fifth lifting drive component (530) is used to drive the uniform coating structure (520) to rise and fall.

7. The pultruded sheet material processing system according to claim 1, characterized in that: The curing device (600) comprises a drying box (610), a heating device and an air supply device, and a temperature control device (620); the conveying device (700) passes through the drying box (610); and the heating device and the air supply device are arranged inside the drying box (610).

8. A method for processing a pultruded plate, characterized in that: include: Use distilled water to clean the surface debris and water-soluble impurities of the board; Use anhydrous ethanol to clean the alcohol-soluble impurities on the surface of the plate to be processed; Use hot air to dry the cleaned boards; Surface treatment of the sheet material using flame; Apply the resin evenly on the surface of the board; Heat to cure the resin on the surface of the board.

9. A pultruded plate processing method according to claim 8, which is applied to a pultruded plate processing system according to any one of claims 1 to 7, characterized in that: The step of surface treating the plate with flame also includes: The spray height of the flame nozzle (410) is adjusted according to the height information of the plate and the flame treatment range, so that the middle flame of the flame just contacts the surface of the plate.

10. A pultruded plate processing method according to claim 8, which is applied to a pultruded plate processing system according to any one of claims 1 to 7, characterized in that: The step of drying the cleaned plate by hot air also includes: The front air outlet assembly (310) and the rear air outlet assembly (320) are controlled to move horizontally from the middle of the plate to both sides at the same time, and the movement speed of the front air outlet assembly (310) and the rear air outlet assembly (320) is greater than the movement speed of the plate, so that the moisture in the center of the plate is blown out to both sides, thereby improving the drying efficiency.

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