Preparation device of enhanced drainage pipeline

Abstract

The invention discloses a preparation device of an enhanced drainage pipeline, which comprises a feeding device and a mixing device, a plurality of weighing devices are arranged on the feeding device, and the weighing devices are respectively used for weighing one material; a conveying assembly is arranged on the feeding device, and the conveying assembly conveys materials in each weighing device into the mixing device at a uniform speed according to a preset weight ratio, wherein the mixing device comprises a containing cavity used for loading thermoplastic polymers and glass fiber yarn bundles; a plurality of heating assemblies are vertically installed at the bottom of the containing cavity and distributed in the containing cavity in a circumferential array mode. The heating assembly comprises a plurality of heating units for independently controlling the working state; a plurality of temperature sensing assemblies are uniformly arranged in the vertical direction of the heating assembly, and the temperature sensing assemblies are used for monitoring local temperature; the heating assembly and the temperature sensing assembly are both electrically connected with the control assembly, and the control assembly controls a heating unit of the heating assembly according to the temperature detected by the temperature sensing assembly, so that local temperature adjustment in the melting and mixing process is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of drainage pipes, in particular to a preparation device of an enhanced drainage pipe. BACKGROUND

[0002] Compared with traditional cast iron pipes, galvanized steel pipes and cement pipes, plastic pipes have the advantages of energy saving and material saving, environmental protection, light weight and high strength, corrosion resistance, smooth inner wall, no fouling, convenient construction and maintenance, long service life and the like, and are widely used in building water supply and drainage, urban and rural water supply and drainage, city gas, power and optical cable sheath, industrial fluid transportation, agricultural irrigation and the like building, municipal, industrial and agricultural fields. At present, main plastic pipes include UPVC drainage pipes, UPVC water supply pipes, aluminum-plastic composite pipes, polyethylene (PE) water supply pipes and polypropylene PPR hot water pipes. For example, a preparation method of a friction-resistant drainage pipe is disclosed in Chinese patent CN201911065545.X, which comprises the following raw materials in parts by weight: chlorinated polyethylene 80-90 parts, fluororubber 15-20 parts, nano-silicon dioxide 8-12 parts, nano-silicon carbide 4-9 parts, nano-calcium carbonate 6-8 parts, nano-bamboo charcoal powder 3-5 parts, glass fiber 6-10 parts, titanate coupling agent 1-2 parts, antibacterial agent 2-3 parts, plasticizer 3-5 parts, antioxidant 1-3 parts and light stabilizer 1-3 parts. The nano-silicon dioxide, nano-silicon carbide and nano-calcium carbonate are used as mixed auxiliary materials for preparing the drainage pipe, so that the strength of the polymer material is improved. The nano-bamboo charcoal powder is heated during the preparation of the drainage pipe material, so that the nano-bamboo charcoal powder and the antibacterial agent are compounded to enhance the antibacterial property of the drainage pipe material, thereby further improving the corrosion resistance of the drainage pipe and increasing the service life of the drainage pipe. Also, a mixing device of a composite catalyst for preparing a vinyl ether is disclosed in Chinese utility model patent CN212819862U, which comprises a stirring tank and a heating tank, and is characterized in that: a stirrer is arranged in the stirring tank, the rotating shaft of the stirrer is in transmission connection with a speed reducer motor outside the stirring tank, the lower end of the rotating shaft is provided with a curved impeller, the heating tank and the stirring tank are connected through a U-shaped connecting pipe at the bottom, a liquid outlet valve is arranged on one side of the U-shaped connecting pipe close to the stirring tank, and a liquid inlet valve is arranged on the other side close to the heating tank, a filter screen is arranged on the pipe opening at the bottom of the stirring tank, temperature and liquid level sensors are arranged in the heating tank, and a control panel and a heating jacket are arranged on the outer wall of the heating tank, an exhaust pipe is arranged on the top of the heating tank, and a safety valve is arranged on the exhaust pipe, the outer portion of the heating tank is connected with a vacuum pump and a nitrogen membrane group through two gas pipelines respectively, a vacuum baffle valve is arranged on the gas pipeline connected with the vacuum pump, a nitrogen gas charging valve is arranged on the gas pipeline connected with the nitrogen membrane group, and the temperature and liquid level sensors are in electrical connection with the control panel.

[0003] The applicant found that the prior art has the following technical defects: the melting temperature of CPE is 120-140 DEG C, and the fluorine rubber needs to be above 160 DEG C to be effectively plasticized. If the temperature is insufficient, such as normal temperature mixing, the two materials with large polarity difference cannot form a uniform blending system, resulting in interface delamination and reduced friction resistance. The mixing device of the prior art has defects and cannot realize temperature compensation. For example, the double valve design of the U-shaped connecting pipe in the prior art redundantly overlaps the functions of the liquid outlet valve and the liquid inlet valve. If the two valves are operated synchronously, it may cause fluid stagnation or pressure imbalance. Moreover, only a single temperature sensor and a liquid level sensor are used, and if a fault occurs, it may cause misoperation, such as dry burning or overflow. The functions of the stirrer and the heating tank are split, and the stirring tank only mixes, and the heating tank only heats, without considering the scene of synchronous temperature control and stirring in the reaction process. SUMMARY

[0004] In order to overcome the technical defects of the mixing device of the prior art that cannot realize local uniform heating and temperature compensation, and without considering the synchronous temperature control and stirring in the reaction process, the application provides a preparation device for reinforced drainage pipeline.

[0005] In order to solve the above problems, the application is implemented according to the following technical scheme:

[0006] The preparation device for reinforced drainage pipeline comprises a feeding device and a mixing device. A plurality of weighing devices are arranged on the feeding device, and each weighing device is used for weighing the weight of one material. A conveying assembly is arranged on the feeding device, and the conveying assembly uniformly sends the materials in each weighing device into the mixing device according to a preset weight ratio. The mixing device comprises a cavity for loading thermoplastic polymer and glass fiber yarn bundle. A plurality of heating assemblies are vertically installed at the bottom of the cavity, and the heating assemblies are arranged in a circular array in the cavity. The heating assemblies comprise a plurality of heating units, and the heating units can independently control their working states. A plurality of temperature sensing assemblies are uniformly arranged in the vertical direction of the heating assemblies, and the temperature sensing assemblies are used for monitoring the local temperature around them. The heating assemblies and the temperature sensing assemblies are electrically connected with a control assembly, and the control assembly controls the heating units of the heating assemblies according to the temperature detected by the temperature sensing assemblies, so as to realize local temperature adjustment in the melting and mixing process.

[0007] Preferably, the weighing devices are electrically connected with the control assembly, and the weighing devices comprise a first weighing device and a second weighing device. The feeding device is provided with two conveying assemblies, the first conveying assembly is connected with the first weighing device, and the second conveying assembly is connected with the second weighing device. The first conveying assembly is used for the thermoplastic polymer to enter the mixing device, and the second conveying assembly is used for the glass fiber yarn bundle to enter the mixing device.

[0008] Preferably, the first weighing device is provided with a first container, a first camera assembly, and a first weighing sensor; the first camera assembly is installed on the first container and is used to identify the type of thermoplastic polymer; the first weighing sensor is located at the bottom of the first container, and the first weighing sensor detects the preset weight of the thermoplastic polymer and feeds the measured value back to the control assembly.

[0009] Preferably, the first camera component includes a first image processing unit for acquiring a real-time image sequence of the thermoplastic polymer, wherein the real-time image sequence performs the following steps: processing the t-th frame image... Perform grayscale conversion and adaptive histogram equalization to obtain the enhanced image. Calculate the particle area ratio of thermoplastic polymers according to the formula.

[0010]

[0011] Where Ω represents the image pixel domain, τ ρ The threshold is dynamically updated based on the Otsu algorithm; when Compared with the target benchmark value deviation Greater than the threshold ε p At that time, a first control command is generated to adjust the feeding rate of the first weighing device.

[0012] Preferably, each of the second weighing devices is provided with a second container, a second camera assembly, and a second weighing sensor; the second camera assembly is installed on the second container and is used to identify the state of the glass fiber yarn bundle; the second weighing sensor is located at the bottom of the second container, and the second weighing sensor detects the weight of the glass fiber yarn bundle and feeds the measured value back to the control assembly.

[0013] Preferably, the second camera component includes a second image processing unit for acquiring a real-time image sequence of the glass fiber yarn bundle; the real-time image sequence of the glass fiber yarn bundle performs the following steps: processing the t-th frame image... Perform edge detection and skeletonization to extract the pixel set of the yarn bundle centerline. Calculate the yarn bundle distribution uniformity index according to the formula.

[0014]

[0015] in, and They are respectively The mean and standard deviation of the projection in the x-direction; when Compared with the target benchmark value deviation Greater than the threshold ε F At that time, a second control command is generated to adjust the feed rate of the glass fiber yarn bundle of the second weighing device.

[0016] Preferably, the preset weight ratio is the mass ratio of thermoplastic polymer to glass fiber yarn bundle, and the preset weight ratio is selected from any of the following: the first preset weight ratio is 11:5, which is suitable for applications with extremely high requirements for the chemical corrosion resistance and inner surface smoothness of the pipeline; the second preset weight ratio is 15:9, which is suitable for applications with extremely high requirements for the ring stiffness and external pressure resistance of the pipeline; the third preset weight ratio is between 11:5 and 15:9, and the melt flow rate of the molten mixture is controlled within the range of 5 to 10 g / 10 min; the third preset weight ratio is suitable for applications that require comprehensive performance requirements that balance corrosion resistance, inner surface smoothness, ring stiffness, and external pressure resistance.

[0017] Preferably, when the mixing device experiences thermal inertia or changes in the thermophysical properties of the thermoplastic polymer during operation, the temperature control device performs feedforward compensation on the set power P, and the compensation amount ΔP is calculated by the following formula:

[0018]

[0019] Where ΔT is the set temperature T * The difference between the measured temperature T and the actual temperature T is ΔT = T * -T,K c To compensate for the gain proportionally, K f For differential compensation gain, C p The average specific heat capacity of the molten mixture in the temperature range of 120℃ to 180℃ is given by m, where m is the real-time mass of the molten mixture. The measured rate of temperature change To set the rate of temperature change.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The application forms an adjustable temperature field in the radial direction of the cavity by the circumferential array of heating components. The array arrangement makes the heating units form a continuous and adjustable temperature gradient in the radial direction, and the melt is heated synchronously in the circumferential and radial directions under the action of rotation or natural convection, thereby significantly reducing the radial temperature difference and avoiding the cold core phenomenon in the central area. The circumferential array of heating components cooperates with the flow direction of the melt to generate a micro eddy current, which plays an auxiliary stirring role and makes the glass fiber yarn bundle and the thermoplastic polymer further uniformly dispersed in the melting process. By independently controlling the power of each heating unit, an arbitrary required asymmetric temperature field can be formed in the radial direction to meet the harsh requirements of different formulations on temperature distribution and improve the blending quality. A continuous gradient temperature zone of 120-160 DEG C is formed in the cavity, and different components with different melting points can form a continuous gradient temperature field in the height direction, so that the first melting phase and the later melting phase are synchronized to ensure that the blending system is uniform and the mechanical properties of the finished product are consistent, and the interlayer peeling strength of the final product is increased by more than 30%. The temperature control device can complete the temperature rise adjustment in a short time; the heating, mixing and temperature control device is in a single cavity, the double valve redundancy structure of the U-shaped connecting pipe in the prior art is cancelled, the fluid path is shortened by 40%, and the pressure loss is reduced by 25%, which not only avoids the stagnation caused by the synchronous failure of the valve group, but also reduces the cleaning dead angle. The multi-section temperature sensing assembly feeds back point by point, the independent heating unit starts and stops in milliseconds, and any local temperature anomaly is compensated in real time; even if a sensor or a heating unit fails, the adjacent unit automatically takes over, eliminating the risk of dry burning, coking or overflow. Since the temperature field can be adjusted according to actual needs, the device is not only suitable for CPE / fluororubber systems, but also compatible with HDPE / EVOH, PP / PA and other polar difference combinations without replacing hardware; at the same time, since the heating component is embedded in the melt, the thermal efficiency is increased to 92%, which is 15%-20% lower than the traditional outer jacket scheme. While ensuring the high friction resistance and high pressure resistance of the reinforced drainage pipeline, the device is miniaturized, intelligentized and energy-optimized, and overcomes the defects of interface delamination, temperature control lag, pipeline redundancy and safety failure in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0022] The specific embodiments of the application will be further described in detail below with reference to the accompanying drawings, in which:

[0023] Figure 1 is a structure diagram of a preparation device of a reinforced drainage pipeline according to the application Figure 1 ;

[0024] Figure 2 is a structure diagram of a preparation device of a reinforced drainage pipeline according to the application Figure 2 ;

[0025] In the diagram: 1-feeding device, 11-first weighing device, 111-first container, 112-first camera assembly, 113-first weighing sensor, 12-second weighing device, 121-second container, 122-second camera assembly, 123-second weighing sensor, 13-conveying assembly, 131-first conveying assembly, 132-second conveying assembly;

[0026] 2-Mixing device, 21-Cavity, 22-Heating assembly, 221-Heating unit, 23-Temperature sensing assembly, 24-Discharge port;

[0027] 3 - Discharge assembly. Detailed Implementation

[0028] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0029] like Figures 1-2 As shown, the apparatus for preparing an enhanced drainage pipe according to the present invention includes a feeding device 1 and a mixing device 2. The feeding device 1 is equipped with multiple weighing devices, each used to weigh a different material. A conveying assembly is provided on the feeding device 1, which feeds the material from each weighing device into the mixing device 2 at a predetermined weight ratio. The mixing device 2 includes a cavity 21 for loading thermoplastic polymer and glass fiber yarn bundles. Several heating components 22 are vertically installed at the bottom of the cavity 21. The heating elements are arranged in a circular array within the cavity 21; the heating assembly 22 includes several heating units 221, each of which can be independently controlled in its operating state; multiple temperature sensing elements 23 are uniformly arranged in the vertical direction of the heating assembly 22, and these temperature sensing elements 23 are used to monitor the local temperature around them; both the heating assembly 22 and the temperature sensing elements 23 are electrically connected to a control component, which controls the heating units 221 of the heating assembly 22 based on the temperature detected by the temperature sensing elements 23, thereby achieving local temperature regulation during the melting and mixing process.

[0030] It can be understood that the circumferential array vertical heating assembly 22 forms a radial temperature field at the bottom of the cavity 21, the heated area of the melt is increased, the center and the edge are heated synchronously, the cold core is eliminated, and the thermoplastic polymer and the glass fiber yarn bundle are uniformly plasticized in the melting stage. The circumferential array is repeated around the central axis of the cavity 21, and the distance between the two adjacent heating assemblies 22 is the same, each heating unit 221 is independently controllable, and the vertical layered temperature sensor is matched to realize gradient temperature control in the same cavity 21: the power of the high melting point area is increased, the power of the low melting point area is reduced, local overheating degradation or under-melting stratification is avoided, and the interface compatibility is significantly improved. The array layout itself constitutes a passive stirring structure: the melt generates microcirculation under the driving of the radial temperature difference, and interacts with the heating unit 221 of the circumferential array to form a micro eddy current, so that the fiber is uniformly dispersed and the agglomeration is reduced without additional stirring mechanism. The temperature sensing assembly 23 and the heating closed loop are all built-in in the cavity 21, the external circulating pipeline is cancelled, the structure is compact, the leakage points and the cleaning dead angle are reduced; the independent modular heating unit 221 can be disassembled and assembled online, and the maintenance is convenient.

[0031] The heating assembly 22 arranged in a circumferential array generates an adjustable temperature field in the radial direction of the cavity 21. Due to the array arrangement, each heating unit 221 forms a continuous and adjustable temperature gradient in the radial direction, and the melt is heated synchronously in the circumferential and radial directions under the action of rotation or natural convection, thereby significantly reducing the radial temperature difference and avoiding the cold core phenomenon in the central area. The circumferential array of the heating assembly 22 cooperates with the flow direction of the melt to generate a micro-vortex, which plays an auxiliary stirring role and further uniformly disperses the glass fiber yarn bundle and the thermoplastic polymer during the melting process. By independently controlling the power of each heating unit 221, an arbitrary asymmetric temperature field can be formed in the radial direction to meet the stringent requirements of different formulations on temperature distribution and improve the blending quality. A continuous gradient temperature zone of 120-160℃ is formed in the cavity 21, and different components with different melting points can form a continuous gradient temperature field in the height direction, so that the pre-melted phase and the post-melted phase are plasticized synchronously, avoiding phase separation or interface delamination caused by local supercooling, ensuring uniform blending of the system and consistent mechanical properties of the finished product, and increasing the interlayer peeling strength of the final product by more than 30%. The temperature control device can complete temperature rise adjustment in a short time. The heating, mixing, and temperature control devices are inside the single cavity 21, eliminating the double-valve redundant structure of the U-shaped connecting pipe in the prior art, shortening the fluid path by 40% and reducing the pressure loss by 25%, which not only avoids stagnation caused by synchronous failure of the valve group, but also reduces the cleaning dead angle. The multi-section temperature sensing assembly 23 feeds back point by point, and the independent heating unit 221 starts and stops at a millisecond level, so that any local temperature anomaly can be compensated in real time. Even if a sensor or heating unit 221 fails, the adjacent unit will automatically take over to eliminate the risk of dry burning, coking, or material overflow. Since the temperature field can be adjusted according to actual needs, the device is not only suitable for CPE / fluororubber systems, but also compatible with HDPE / EVOH, PP / PA, and other polar difference combinations without the need to replace hardware. At the same time, since the heating assembly 22 is embedded inside the melt, the thermal efficiency is increased to 92%, which is 15%-20% more energy-efficient than the traditional outer jacket scheme. While ensuring the high friction resistance and high pressure resistance of the reinforced drainage pipeline, the device is miniaturized, intelligentized, and energy-optimized, overcoming the defects of interface delamination, temperature control lag, pipeline redundancy, and safety failure in the prior art. In one embodiment, the other side of the cavity 21 is provided with a discharge port 24, the discharge port 24 is sealingly connected with a discharge assembly 3, the discharge assembly 3 is funnel-shaped, and the downstream end of the discharge assembly 3 is connected with the feeding section of the external extrusion equipment through a heat preservation pipeline.

[0032] The inner wall of the funnel-shaped discharge port has an inclination angle, which makes the molten mixture form a uniform and continuous flow under the double action of gravity and forced conveying of the discharge assembly 3, avoiding local stagnation and causing temperature unevenness and fiber agglomeration, thereby improving the dispersion uniformity of the glass fiber ≥ 12%. The discharge assembly adopts a gear pump structure, and its volumetric conveying characteristics enable the molten mixture to enter the extrusion equipment stably under a constant pressure of 5-25 MPa, eliminating the pressure fluctuations that are prone to occur in traditional gravity feeding, ensuring that the screw fill factor of the extruder is stable at 95%-105%, and significantly reducing bubbles and surface defects in the extrusion process. The discharge port 24 is sealingly connected to the discharge assembly 3, and the molten mixture after the thermoplastic polymer and glass fiber strand are moltenly mixed is conveyed to the external extrusion equipment by the discharge assembly 3 for extrusion molding.

[0033] Further, the weighing device is electrically connected to the control assembly, including a first weighing device 11 and a second weighing device 12; the feeding device 1 is provided with two conveying assemblies 13, the first conveying assembly 131 is connected to the first weighing device 11, and the second conveying assembly 132 is connected to the second weighing device 12; the first conveying assembly 131 is used for the thermoplastic polymer to enter the mixing device 2, and the second conveying assembly 132 is used for the glass fiber strand to enter the mixing device 2.

[0034] It can be understood that the two weighing devices are independent of each other, and the preset weight ratio of the thermoplastic polymer and the glass fiber strand is completed before entering the mixing device 2, avoiding the lag error caused by traditional single-scale mixing, ensuring constant fiber content and stable product performance. Two conveying assemblies 13 correspond to two weighing devices one by one, and the material channels are physically isolated to prevent cross contamination; at the same time, the feeding rate of any scale can be independently adjusted according to process requirements, realizing online fine adjustment of the ratio without stopping. The weighing signal is directly connected to the same control assembly, sharing the data bus with the array heating assembly 22 and the sensing system, forming a weight and temperature matching: if one of the materials fluctuates instantaneously, the control assembly can immediately adjust the power of the corresponding area heating unit 221 to compensate, maintain the molten viscosity matching, and prevent interface defects caused by ratio drift.

[0035] Further, the first weighing device 11 is provided with a first containing container 111, a first camera assembly 112, and a first weighing sensor 113; the first camera assembly 112 is installed on the first containing container 111 and is used to identify the type of the thermoplastic polymer; the first weighing sensor 113 is arranged at the bottom of the first containing container 111, and detects the preset weight of the thermoplastic polymer and feeds back the measurement value to the control assembly. The first camera assembly 112 includes a first image processing unit for acquiring a real-time image sequence of the thermoplastic polymer, and the real-time image sequence performs the following steps:

[0036] For the t-th frame image Perform grayscale conversion and adaptive histogram equalization to obtain the enhanced image.

[0037] Calculate the particle area ratio of thermoplastic polymers according to the formula.

[0038]

[0039] Where Ω represents the image pixel domain, τ p The threshold is dynamically updated based on the Otsu algorithm;

[0040] when Compared with the target benchmark value deviation Greater than the threshold ε p At that time, a first control command is generated to adjust the feeding rate of the first weighing device.

[0041] Understandably, the original image of frame t is taken. First, convert it to a single-channel grayscale image, then perform adaptive histogram equalization to obtain a contrast-enhanced image.

[0042] In the current frame Run the Otsu algorithm to automatically find the threshold τ that maximizes the inter-class variance. p This threshold is refreshed frame by frame as image brightness and particle reflectivity change, ensuring that the segmentation is always at its optimal level.

[0043] right pixel-by-pixel and τ p Comparison: If the pixel value is greater than τ p If a pixel is identified as a grain, it is considered a grain pixel; otherwise, it is considered background. The total number of pixels identified as grains is summed, and then divided by the total number of pixels in the entire image (|Ω|) to obtain the grain area percentage of the current frame.

[0044] Will Compared with the preset benchmark Find the absolute difference like Exceeding the set allowable fluctuation threshold ε p If this occurs, the first control command is triggered to immediately correct the feeding rate and achieve closed-loop compensation.

[0045] Furthermore, each of the second weighing devices 12 is equipped with a second container 121, a second camera assembly 122, and a second weighing sensor 123. The second camera assembly 122 is mounted on the second container 121 and is used to identify the state of the glass fiber yarn bundle. The second weighing sensor 123 is located at the bottom of the second container 121 and detects the weight of the glass fiber yarn bundle, feeding the measured value back to the control assembly. The second camera assembly 122 includes a second image processing unit for acquiring a real-time image sequence of the glass fiber yarn bundle. The real-time image sequence of the glass fiber yarn bundle performs the following steps:

[0046] For the t-th frame image Perform edge detection and skeletonization to extract the pixel set of the yarn bundle centerline.

[0047] Calculate the yarn bundle distribution uniformity index according to the formula.

[0048]

[0049] in, and They are respectively Mean and standard deviation of the projection in the x-direction;

[0050] when Compared with the target benchmark value deviation Greater than the threshold ε F At that time, a second control command is generated to adjust the feed rate of the glass fiber yarn bundle of the second weighing device.

[0051] Understandably, the image of frame t is taken. First, Gaussian filtering is performed for noise reduction. Then, the Canny operator is used to extract the yarn bundle edges, resulting in a binary edge map. A skeletonization operation is then performed on the binary edge map, shrinking the yarn bundle region to a single-pixel-width centerline, forming a set of pixels representing the yarn bundle centerline.

[0052] right Projecting in the x-direction: Count the number of centerline pixels in each column x to generate a one-dimensional projection sequence.

[0053] Calculate the mean of the sequence. and standard deviation Used to describe the degree of concentration of the yarn bundle in the lateral direction.

[0054] Will and Substitute into the formula Calculate the yarn bundle distribution uniformity index of the current frame. The closer to 1, the more uniform the cross-sectional distribution of the yarn bundle.

[0055] The pre-set reference is obtained . If the threshold value ε F is exceeded, a second control command is generated to immediately adjust the yarn bundle feeding rate to maintain uniform feeding.

[0056] In one embodiment, the control component is further configured to receive the pre-set reference

[0057] . total The overall deviation Δ is calculated according to the formula:

[0058]

[0059] where w P , w F are the weight coefficients of the thermoplastic polymer and the glass fiber yarn bundle, respectively, and w P +w F = 1; when Δ total exceeds the overall threshold value ε total , the control component synchronously adjusts the discharge rate of the first weighing component and the yarn bundle feeding rate of the second weighing component to maintain the set weight ratio.

[0060] Further, the pre-set weight ratio is the mass ratio of the thermoplastic polymer to the glass fiber yarn bundle, and the pre-set weight ratio is selected from any one of the following: a first pre-set mass ratio of 11:5, which is suitable for applications with extremely high requirements for the chemical corrosion resistance and inner surface finish of the pipe; a second pre-set mass ratio of 15:9, which is suitable for applications with extremely high requirements for the ring stiffness and external pressure resistance of the pipe; a third pre-set mass ratio between 11:5 and 15:9, and the control of the melt flow rate of the molten mixture is within the range of 5-10 g / 10 min; the third pre-set mass ratio is suitable for applications that require comprehensive performance requirements for corrosion resistance, inner surface finish, ring stiffness, and external pressure resistance.

[0061] In one embodiment, the first pre-set mass ratio of 11:5 has an absolute dominant thermoplastic polymer matrix with glass fibers as an embellishment. High resin content can form a continuous and dense polymer barrier on the inner wall of the pipe, blocking the penetration path of corrosive media; at the same time, the melt is more easily sheared in the mold cavity, and after cooling, a very thin resin-rich layer appears, directly giving a mirror-level inner surface. The inner wall is smooth, the fluid friction is reduced, and the pumping energy consumption is reduced; the resin-rich layer can seal the fiber end, and the long-term chemical resistance is improved.

[0062] In another embodiment, the proportion of glass fiber bundles coagulating into glass fibers is significantly increased in the second preset mass ratio 15:9, and a three-dimensional load-bearing network begins to form between the glass fibers. When the pipe wall is subjected to external pressure, the load is quickly diffused through the fiber network to a larger area, and the matrix is only responsible for transmitting shear, and the ring stiffness jumps linearly with the fiber volume fraction. The fiber network inhibits crack propagation and improves slow crack growth resistance, allowing thinner wall designs and saving raw materials; high modulus fibers share the load and have low long-term creep, reducing the risk of settlement after burial.

[0063] The third preset mass ratio is between 11:5 and 15:9, and the MFR is 5-10 g / 10 min, which exactly finds a balance point between the corrosion-resistant resin-rich layer and the fiber load-bearing network; at the same time, by fine-tuning the proportion, the melt flow rate is locked at 5-10 g / 10 min, which ensures that high fiber content can still be fully infiltrated and bubble-free, and avoids uneven wall thickness caused by excessive thinning. The same pipe has both chemical barrier and ring steel functions, simplifying the process and allowing large-scale production without additional modification.

[0064] Further, when thermal inertia or thermal property changes of the thermoplastic polymer occur during the operation of the mixing device 2, the temperature control device compensates for the set power P, and the compensation amount ΔP is calculated by the following formula:

[0065]

[0066] where ΔT is the difference between the set temperature T * and the measured temperature T, K * The proportional compensation gain is K c , and the differential compensation gain is C f The average specific heat capacity of the molten mixture in the range of 120℃-180℃ is C p , and the real-time mass of the molten mixture is m The measured temperature change rate is , and the set temperature change rate is

[0067] It can be understood that in one embodiment, the average specific heat capacity C p is dynamically corrected according to the weight percentage w f of the glass fiber bundle to obtain the corrected specific heat capacity C' p :

[0068] C' p = (1-α·w f )·C p where α is the glass fiber heat capacity correction coefficient, and the value is 0.20-0.35.

[0069] According to the ambient temperature Ta Compared with reference temperature T b The difference ΔT a =T a -T b , proportional compensation gain K c After correction, the corrected gain K' is obtained. c :

[0070] K' c =K c ·[1+β·(ΔT a / 10)];

[0071] Where β is the environmental correction factor, with a value ranging from 0.05 to 0.10℃. 1 .

[0072] Precise temperature control during the melting process is achieved using a PI controller with feedforward compensation; the molten mixture is then extruded into pipes. The temperature compensation amount ΔP is determined by... The calculations were performed, and corrections for glass fiber content and ambient temperature were further introduced. A circumferential array heating element 22, distributed sensors, and an online weighing sensor were designed for the corresponding stirring device. The system integrates, processes, controls temperature, and outputs modules to ensure a moisture content of 0.15±0.05wt% and a steady-state temperature error of ≤±0.5℃, significantly improving the uniformity of glass fiber dispersion and the ring stiffness of the finished product.

[0073] The real-time measured ΔT and rate of temperature change Set temperature change rate And the current mass m substituted into the formula First calculate the proportional term K c ·ΔT, then calculate the differential term Finally, calculate the feedforward term. The three factors are added together to obtain the compensation power ΔP.

[0074] Based on the current weight percentage of glass fiber yarn bundles w f α is selected within the range of 0.20 to 0.35, and w is used. f The correction factor is obtained by multiplying the product of C and α, then subtracting the correction factor from 1 and multiplying by the original C. p The corrected C' is obtained p ; then C' p Replacement formula: C in p Then, summate the results again to obtain a new ΔP.

[0075] Measuring ambient temperature T a , with reference temperature T b The difference is ΔT a ; will ΔT aAfter dividing by 10, multiply by β, and add 1 to form a gain correction coefficient; multiply the original K by the coefficient to obtain the corrected K' c c ; finally, replace K in the formula c with K' c , complete the synchronous update of all three parameters, so as to ensure that the compensation amount ΔP is always accurate when the thermal properties of the raw materials fluctuate and the ambient temperature changes.

[0076] Other structures of the preparation device of the enhanced drainage pipeline described in the embodiment are referred to the prior art.

[0077] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any modification, equivalent change and modification of the above embodiment based on the technical essence of the present application, without departing from the technical solution content of the present application, still belongs to the scope of the technical solution of the present application.​​

Claims

1. A device for preparing reinforced drainage pipes, comprising a feeding device and a mixing device, characterized in that: a plurality of weighing devices are arranged on the feeding device, each of which is used to weigh a kind of material; a conveying assembly is arranged on the feeding device, which uniformly sends the material in each weighing device into the mixing device according to a preset weight ratio; the mixing device comprises a cavity for loading thermoplastic polymer and glass fiber yarn bundles; a plurality of heating assemblies are vertically arranged on the bottom of the cavity, which are arranged in a circular array in the cavity; each of the heating assemblies comprises a plurality of heating units, the working state of which can be independently controlled; a plurality of temperature sensing assemblies are uniformly arranged in the vertical direction of the heating assemblies, which are used to monitor the local temperature around them; the heating assemblies and the temperature sensing assemblies are electrically connected to a control assembly, which controls the heating units of the heating assemblies according to the temperature detected by the temperature sensing assemblies to realize local temperature regulation during the melting and mixing process. 2.The device for preparing reinforced drainage pipes according to claim 1, characterized in that: the weighing devices are electrically connected to the control assembly, comprising a first weighing device and a second weighing device; the feeding device is provided with two conveying assemblies, the first conveying assembly is connected to the first weighing device, and the second conveying assembly is connected to the second weighing device; the first conveying assembly is used for the thermoplastic polymer to enter the mixing device, and the second conveying assembly is used for the glass fiber yarn bundle to enter the mixing device. 3.The device for preparing reinforced drainage pipes according to claim 2, characterized in that: the first weighing device is provided with a first loading container, a first camera assembly and a first weighing sensor; the first camera assembly is arranged on the first loading container and is used to identify the type of the thermoplastic polymer; the first weighing sensor is arranged at the bottom of the first loading container, which detects the preset weight of the thermoplastic polymer and feeds back the measurement value to the control assembly. 4.The device for preparing reinforced drainage pipes according to claim 3, characterized in that: the first camera assembly comprises a first image processing unit, which is used to collect a real-time image sequence of the thermoplastic polymer, and the real-time image sequence performs the following steps: 1) identifying the type of the thermoplastic polymer; 2) identifying the color of the thermoplastic polymer; 3) identifying the shape of the thermoplastic polymer; 4) identifying the size of the thermoplastic polymer; 5) identifying the weight of the thermoplastic polymer. 5.The device for preparing reinforced drainage pipes according to claim 2, characterized in that: the second weighing device is provided with a second loading container, a second camera assembly and a second weighing sensor; the second camera assembly is arranged on the second loading container and is used to identify the state of the glass fiber yarn bundle; the second weighing sensor is arranged at the bottom of the second loading container, which detects the weight of the glass fiber yarn bundle and feeds back the measurement value to the control assembly. 6.The device for preparing reinforced drainage pipes according to claim 5, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ for the t-th frame image performing grayscale and adaptive histogram equalization to obtain an enhanced image Calculating the area fraction of particles of thermoplastic polymer according to the formula wherein, Ω is the image pixel domain, τ ρ is the threshold value based on the dynamic update of Otsu algorithm; when Compared with the target benchmark value deviation Greater than the threshold ε [ At that time, a first control command is generated to adjust the feeding rate of the first weighing device. ​ ​ ​ ​ ​ The second camera assembly comprises a second image processing unit configured to acquire a real-time image sequence of the glass fiber tow; The real-time image sequence of the glass fiber tow is configured to perform the following steps: for the tth frame of images perform edge detection and skeletonization to extract a set of yarn bundle centerline pixels The yarn bundle distribution evenness index is calculated according to the formula wherein and are respectively Mean and standard deviation of the projection in the x direction; when Compared with the target benchmark value deviation Greater than the threshold ε F At that time, a second control command is generated to adjust the feed rate of the glass fiber yarn bundle of the second weighing device.

7. The device for preparing a reinforced drainage pipe according to claim 1, characterized in that: The preset weight ratio is the mass ratio of the thermoplastic polymer to the glass fiber tow, and the preset weight ratio is selected from any one of the following: The first preset mass ratio is 11:5, and the first preset mass ratio is suitable for occasions with extremely high requirements for the chemical corrosion resistance and inner surface finish of the pipe; The second preset mass ratio is 15:9, and the second preset mass ratio is suitable for occasions with extremely high requirements for the ring stiffness and external pressure resistance of the pipe; The third preset mass ratio is between 11:5 and 15:9, and the melt flow rate of the molten mixture is controlled in the range of 5-10 g / 10 min; the third preset mass ratio is suitable for occasions with comprehensive performance requirements of corrosion resistance, inner surface finish, ring stiffness and external pressure resistance.

8. The device for preparing a reinforced drainage pipe according to claim 1, characterized in that: When thermal inertia or thermal physical property change of the thermoplastic polymer occurs in the working process of the mixing device, the temperature control device performs feedforward compensation on the set power P, and the compensation amount ΔP is calculated by the following formula: where ΔT is the difference between the set temperature T * where ΔT is the difference between the set temperature T * - T, K c is the proportional compensation gain, K f is the differential compensation gain, C p is the average specific heat capacity of the molten mixture in the interval 120°C - 180°C, m is the real-time mass of the molten mixture is the real-time temperature change rate, is the set temperature change rate.

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