Annular concrete-cement electric pole machining method

Abstract

The invention relates to the technical field of electric power facility manufacturing, in particular to a machining method for an annular concrete electric pole. Comprising the following steps: preparing gradient functional concrete, and pre-assembling a steel reinforcement framework; a detachable double-mold frame is installed, sectional type pouring is carried out, centrifugal composite forming is carried out, and a mold is obtained; the poured mold is subjected to steam curing, and negative pressure dehydration cooperative treatment is adopted; the maintained mold is dismantled, the electric pole formed through segmented pouring is obtained, and all the segments are subjected to embedding treatment and strengthening treatment; performing quality detection on the concrete pole, recording defects found in the detection, and performing accurate repair on the defects; performing finished product protection on the concrete pole, and performing factory verification on the concrete pole; through the mode, the compactness uniformity of concrete is improved, the layering and segregation phenomena are avoided, internal bubbles are efficiently discharged, the porosity is greatly reduced, and the product quality is improved.

Description

Technical Field

[0001] This invention relates to the field of power facility manufacturing technology, and in particular to a method for processing ring-shaped concrete cement poles. Background Technology

[0002] Circular concrete poles, with their advantages of low cost, structural stability, and high load-bearing capacity, have become core supporting components of power transmission networks and are widely used in high-voltage transmission lines, urban and rural power distribution networks, new energy (wind power, photovoltaic) transmission projects, and communication base station construction. As power engineering expands towards higher voltage levels, longer transmission distances, and more complex environments, higher demands are being placed on the mechanical properties, durability, and production efficiency of these poles.

[0003] In the existing processing technology of ring-shaped concrete cement poles, when the poured concrete is centrifuged, the concrete is prone to segregation and stratification within the mold. Internal air bubbles cannot be fully discharged, resulting in high porosity and poor uniformity of density, which seriously restricts product quality. Summary of the Invention

[0004] The purpose of this invention is to provide a method for processing annular concrete cement poles, which aims to solve the technical problems in the prior art where, when the poured concrete is centrifuged, the concrete is prone to segregation and stratification within the mold, internal air bubbles cannot be fully discharged, resulting in high porosity, poor uniformity of density, and serious restrictions on product quality.

[0005] To achieve the above objectives, the present invention provides a method for processing annular concrete cement poles, comprising the following steps: Prepare graded functional concrete and pre-assemble the steel reinforcement cage; Install a detachable double mold frame, perform segmented casting, and obtain the mold through centrifugal composite molding; The cast molds are then steam-cured and subjected to a combined negative pressure dehydration treatment. After the mold is removed, the segmented cast poles are obtained, and the joints of each segment are fitted and reinforced. Conduct quality inspections on cement poles, record any defects found during the inspections, and precisely repair any defects. The cement poles are protected as finished products, and factory inspections are performed on them.

[0006] In the steps of preparing graded functional concrete and pre-assembling the reinforcing steel cage: Cement, quartz sand, and basalt crushed stone are put into a mixer and dry-mixed for 4 minutes to make the aggregates evenly mixed. Nano silica and modified polypropylene fiber are added and mixed for 3 minutes to make the fiber evenly dispersed. Diluted water-reducing agent and water are added and mixed at high speed for 9 minutes to form gradient functional concrete with low shrinkage in the inner core and high wear resistance in the outer layer. High-strength threaded steel bars are selected as longitudinal reinforcements, and cold-rolled ribbed steel bars are used as ring stirrups. The surface of the steel bars is treated to remove rust and oil. The steel bars are cut according to the design dimensions. Positioning grooves are processed at both ends of the longitudinal reinforcements. The ring stirrups are bent into a preset arc to ensure that the dimensional accuracy deviation is ≤ ±0.3mm. A laser positioning fixture is used to build an assembly platform. The longitudinal reinforcement bars are evenly distributed around the circumference and the spacing is calibrated by a laser rangefinder, with the deviation controlled within ±0.2mm. The annular stirrups are placed on the outside of the longitudinal reinforcement bars and magnetic attraction is used for multi-point adsorption positioning. The stirrups are perpendicularly attached to the longitudinal reinforcement bars and fixed by resistance spot welding. The overall assembly accuracy of the steel reinforcement skeleton is ≤±0.5mm.

[0007] In the process of dry mixing cement, quartz sand, and basalt crushed stone in a mixer for 4 minutes to ensure uniform aggregate mixing, adding nano-silica and modified polypropylene fibers, mixing for 3 minutes to ensure uniform fiber dispersion, adding diluted water-reducing agent and water, and mixing at high speed for 9 minutes to form gradient functional concrete with a low-shrinkage inner core and a highly wear-resistant outer layer: The concrete mix proportions are: 320-350 parts P.O42.5 grade cement, 550-600 parts quartz sand, 750-800 parts basalt crushed stone, 6-8 parts modified polypropylene fiber, 18-20 parts nano silica, 8-10 parts polycarboxylate-based high-efficiency water-reducing agent, and 125-140 parts water.

[0008] In the process of installing a detachable dual-mold frame, performing segmented casting, and obtaining the mold through centrifugal composite molding: A double-layered, detachable mold is selected. The inner layer is an inflatable rubber airbag, and the outer layer is a spliced ​​structure of 3 to 4 arc-shaped steel molds. A nano-ceramic release agent is evenly coated on the inner wall of the outer steel mold with a coating thickness of 0.1 to 0.2 mm. The inner rubber airbag is inflated to 0.3 to 0.5 MPa. After checking that the airbag has no air leakage or deformation, it is hoisted to the center position of the outer steel mold. The prefabricated steel reinforcement cage is hoisted between the inner and outer molds, and limiting brackets are installed at both ends of the cage to restrict the axial displacement of the cage. The pole is divided into three casting sections according to its length, and a segmented casting method from bottom to top is adopted. The casting height of each section is controlled within ±5mm of the design value. After the first section of pouring is completed, start the centrifuge device and centrifuge at a low speed of 300~500rpm for 1~5min to initially distribute the concrete evenly. Then centrifuge at a high speed of 1200~1500rpm for 5~15min to form a dense concrete layer. Finally, centrifuge at alternating speed pulses of 800~1200rpm for 15~20min to eliminate internal air bubbles. During the centrifugation process, the vacuum pump is started simultaneously to evacuate the inner cavity of the mold to ~0.08MPa. The air bubbles inside the concrete are accelerated to be discharged through the vent holes reserved in the mold, and the porosity of the concrete is reduced to below 2%.

[0009] Among them, in the step of steam curing the cast mold and using negative pressure dehydration as a co-treatment: The completed mold is moved into the steam curing kiln, the kiln door is closed for preheating, the temperature is raised to 40~50℃ at a rate of 5℃ / h and maintained for 2h, and the negative pressure device in the kiln is turned on to maintain a negative pressure value of 0.03~0.05MPa to remove free water from the inside of the concrete. The internal temperature of the concrete is monitored in real time by an embedded temperature sensor and raised to 80℃ at a rate of 5℃ / h. During the heating process, the temperature fluctuation is controlled within ±2℃. After reaching the preset temperature, the humidity inside the kiln is maintained at ≥90% and the curing is continued for 4~6 hours. After curing is completed, the temperature is reduced to room temperature at a rate of 3℃ / h, and the temperature change is continuously monitored during the cooling process. When the temperature difference between the kiln and the room temperature is ≤10℃, the negative pressure device and the temperature control system are turned off to complete the curing process.

[0010] In the process of removing the mold after curing to obtain the segmented cast pole, and then performing fitting and reinforcement treatment on each segment joint: Remove the mold, grind the interface end face of the segmented pole to remove surface laitance and loose aggregate, and expose a solid concrete base. After grinding, the flatness deviation of the interface is ≤0.5mm to ensure that the interface fits tightly. Apply epoxy resin adhesive evenly to the sanded interface, with a coating thickness of 1-2 mm, and embed an annular carbon fiber reinforcing strip with a width of 50-80 mm and a thickness of 3-5 mm. Use hydraulic clamps to pressurize and fix the strip, maintaining the pressure at 0.8-1.0 MPa, and let it cure for 24 hours. After the interface is repaired and the overall surface of the pole is dried, a silane-containing nanocomposite coating is immediately sprayed. The coating particle size is controlled at 50~100nm, and a high-pressure airless spraying process is used with a spraying pressure of 3~5MPa. The coating thickness is uniformly controlled at 0.8~1.2mm. After spraying, it is naturally cured for 2 hours to form a dense protective layer. The interface area and the surface of the pole after coating are then finished with a second layer of plaster, and high-grade polymer cement mortar is used to repair minor unevenness.

[0011] Among the steps involved in quality inspection of cement poles, recording defects found during inspection, and precisely repairing those defects: An ultrasonic flaw detector is used to scan the pole along the entire axis with a scanning interval of ≤50mm to identify internal defects such as honeycomb, voids, and cracks. The straightness and wall thickness uniformity of the utility poles were tested using a laser rangefinder, and the deviation in straightness was ≤3‰. Load tests were conducted to detect flexural and compressive strength. Carbonation resistance was tested using a carbonation test chamber. Flexural strength ≥120MPa, compressive strength ≥40MPa. For the micro-cracks found during the inspection, with a crack width of <0.2mm, epoxy resin grout was injected using the pressure grouting method for repair. For areas with wall thickness deviation, polymer mortar was used for leveling.

[0012] Among the steps involved in protecting the cement poles as finished products and conducting factory inspections on the cement poles: High-strength plastic protective caps are installed at both ends of the pole. The protective caps are fixed to the ends of the pole with snap-fit. The pole connection flange surface is treated with rust prevention and coated with two layers of rust-preventive paint. Record the production parameters of each pole and generate a unique identification code; The surface of the utility pole is wrapped with flexible packaging material, and a label is affixed to a conspicuous position on the pole, indicating the product model, specifications, production date, qualification mark and unique identification code, thus completing the preparation for the finished product to leave the factory.

[0013] In the step of recording the production parameters of each pole and generating a unique identifier: Production parameters include concrete mix proportions, centrifugation parameters, curing data, and test results.

[0014] This invention discloses a method for processing ring-shaped concrete cement poles, comprising the following steps: preparing graded functional concrete and pre-assembling the reinforcing steel skeleton; installing a detachable double-mold frame, performing segmented pouring, and obtaining a mold through centrifugal composite molding; steam curing the poured mold and using negative pressure dehydration synergistic treatment; removing the cured mold to obtain the segmented poured pole, and performing fitting and reinforcement treatment on each segment joint; conducting quality inspection on the cement pole, recording the defects found during inspection, and precisely repairing the defects; protecting the cement pole as a finished product and performing factory verification on the cement pole; through the above methods, the uniformity of concrete density is improved, segregation is avoided, internal air bubbles are efficiently discharged, porosity is significantly reduced, and product quality is improved. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a flowchart of the steps in the processing method of the annular concrete cement pole of the present invention.

[0017] Figure 2 This is a flowchart of steps S100 of the present invention.

[0018] Figure 3 This is a flowchart of steps S200 of the present invention.

[0019] Figure 4 This is a flowchart of steps S300 of the present invention.

[0020] Figure 5 This is a flowchart of steps S400 of the present invention.

[0021] Figure 6 This is a flowchart of steps S500 of the present invention.

[0022] Figure 7 This is a flowchart of steps S600 of the present invention. Detailed Implementation

[0023] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0024] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0025] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0026] Please see Figures 1-7 This invention provides a method for processing annular concrete cement poles, comprising the following steps: S100: Prepare gradient functional concrete and pre-assemble the steel reinforcement cage.

[0027] In this embodiment, graded functional concrete is prepared and the reinforcing steel cage is pre-assembled. The specific process is as follows: S101: Add cement, quartz sand, and basalt crushed stone into a mixer and dry mix for 4 minutes to make the aggregates evenly mixed. Add nano silica and modified polypropylene fiber, mix for 3 minutes to make the fiber evenly dispersed. Add diluted water-reducing agent and water, mix at high speed for 9 minutes to form a gradient functional concrete with low shrinkage in the inner core and high wear resistance in the outer layer. S102: High-strength threaded steel is selected as longitudinal reinforcement, and cold-rolled ribbed steel bars are used as ring stirrups. The surface of the steel bars is derusted and degreased. The steel bars are cut according to the design dimensions. Positioning grooves are processed at both ends of the longitudinal reinforcement. The ring stirrups are bent into the preset arc to ensure that the dimensional accuracy deviation is ≤ ±0.3mm. S103: The assembly platform is built using laser positioning fixtures. The longitudinal reinforcement bars are evenly distributed around the circumference and the spacing is calibrated using a laser rangefinder, with the deviation controlled within ±0.2mm. The annular stirrups are placed on the outside of the longitudinal reinforcement bars and magnetic attraction is used for multi-point adsorption positioning. The stirrups are perpendicularly attached to the longitudinal reinforcement bars and fixed by resistance spot welding. The overall assembly accuracy of the steel reinforcement skeleton is ≤±0.5mm.

[0028] In the above process, cement, quartz sand, and basalt crushed stone are first put into a mixer and dry-mixed for 4 minutes to make the aggregates evenly mixed. Then, nano-silica and modified polypropylene fiber are added and mixed for 3 minutes to make the fiber evenly dispersed. Then, diluted water-reducing agent and water are added and mixed at high speed for 9 minutes to form a gradient functional concrete with low shrinkage in the inner core and high wear resistance in the outer layer. The concrete mix proportion is: 320~350 parts of P.O42.5 grade cement, 550~600 parts of quartz sand, 750~800 parts of basalt crushed stone, 6~8 parts of modified polypropylene fiber, 18~20 parts of nano-silica, 8~10 parts of polycarboxylate-based high-efficiency water-reducing agent, and 125~140 parts of water. Then, high-strength threaded steel is selected as longitudinal reinforcement, and cold-rolled ribbed steel bars are used as annular stirrups. The surface of the steel bars is treated to remove rust and oil. The steel bars are cut according to the design dimensions. Positioning grooves are processed at both ends of the longitudinal reinforcement. The annular stirrups are bent into a preset arc to ensure that the dimensional accuracy deviation is ≤±0.3mm. Then, a laser positioning fixture is used to build an assembly platform. The longitudinal reinforcement is evenly distributed around the circumference. The spacing is calibrated by a laser rangefinder, and the deviation is controlled within ±0.2mm. The annular stirrups are placed on the outside of the longitudinal reinforcement. Multi-point adsorption positioning is achieved by magnetic attraction. The stirrups are perpendicularly attached to the longitudinal reinforcement and fixed by resistance spot welding. The overall assembly accuracy of the steel reinforcement skeleton is ≤±0.5mm.

[0029] S200: Install a detachable dual-mold frame, perform segmented casting, and obtain the mold through centrifugal composite molding.

[0030] In this embodiment, a detachable dual-mold frame is installed for segmented casting, and the mold is obtained through centrifugal composite molding. The specific process is as follows: S201: Select a double-layer detachable mold. The inner layer is an inflatable rubber airbag, and the outer layer is a spliced ​​structure of 3 to 4 arc-shaped steel molds. A nano-ceramic release agent is evenly coated on the inner wall of the outer steel mold with a coating thickness of 0.1 to 0.2 mm. Inflate the inner rubber airbag to 0.3 to 0.5 MPa. After checking that the airbag has no air leakage or deformation, hoist it to the center position of the outer steel mold. S202: Hoist the prefabricated steel reinforcement cage between the inner and outer molds, and install limiting brackets at both ends of the cage to restrict the axial displacement of the cage; S203: Divide the pole into three casting sections according to its length, and adopt a segmented casting method from bottom to top. The casting height of each section is controlled within ±5mm of the design value. S204: After the first section is poured, start the centrifuge device and centrifuge at a low speed of 300~500rpm for 1~5min to initially distribute the concrete evenly. Then centrifuge at a high speed of 1200~1500rpm for 5~15min to form a dense concrete layer. Finally, centrifuge at alternating speed pulses of 800~1200rpm for 15~20min to eliminate internal air bubbles. S205: During the centrifugation process, the vacuum pump is started simultaneously to evacuate the inner cavity of the mold to ~0.08MPa. The air bubbles inside the concrete are accelerated to be discharged through the vent holes reserved in the mold, and the porosity of the concrete is reduced to below 2%.

[0031] In the above process, a double-layered, detachable mold is first selected. The inner layer is an inflatable rubber airbag, and the outer layer is a structure of 3-4 arc-shaped steel molds. A nano-ceramic release agent with a coating thickness of 0.1-0.2mm is evenly applied to the inner wall of the outer steel mold. The inner rubber airbag is inflated to 0.3-0.5MPa. After checking that the airbag is leak-free and deformed, it is hoisted to the center position of the outer steel mold. Then, the prefabricated steel reinforcement skeleton is hoisted between the inner and outer molds, and limiting brackets are installed at both ends of the skeleton to restrict the axial displacement of the skeleton. The pole is then divided into three casting sections according to its length, using a segmented casting method from bottom to top. The casting height of each section is controlled within ±5mm of the design value. In the first section... After pouring, start the centrifuge and centrifuge at a low speed of 300~500rpm for 1~5min to initially distribute the concrete evenly. Then centrifuge at a high speed of 1200~1500rpm for 5~15min to form a dense concrete layer. Finally, centrifuge at alternating speeds of 800~1200rpm for 15~20min to eliminate internal air bubbles. Simultaneously, start the vacuum pump during centrifugation to evacuate the mold cavity to ~0.08MPa. The air bubbles inside the concrete are accelerated to be discharged through the vent holes reserved in the mold, and the concrete porosity is reduced to below 2%.

[0032] S300: The cast mold is cured with steam and then dehydrated under negative pressure.

[0033] In this embodiment, the cast mold is cured with steam and then subjected to negative pressure dehydration. The specific process is as follows: S301: Move the completed mold into the steam curing kiln, close the kiln door and preheat it. The temperature is increased to 40~50℃ at a rate of 5℃ / h and maintained for 2h. Turn on the negative pressure device in the kiln and maintain the negative pressure value of 0.03~0.05MPa to remove free water from the inside of the concrete. S302: The internal temperature of the concrete is monitored in real time by an embedded temperature sensor and raised to 80℃ at a rate of 5℃ / h. During the heating process, the temperature fluctuation is controlled within ±2℃. After reaching the preset temperature, the humidity inside the kiln is maintained at ≥90% and the curing is continued for 4~6 hours. S303: After curing is completed, the temperature is reduced to room temperature at a rate of 3℃ / h, and the temperature change is continuously monitored during the cooling process. When the temperature difference between the kiln and the room temperature is ≤10℃, the negative pressure device and the temperature control system are turned off to complete the curing process.

[0034] In the above process, the cast mold is first moved into the steam curing kiln, the kiln door is closed for preheating, and the temperature is raised to 40~50℃ at a rate of 5℃ / h and maintained for 2 hours. The negative pressure device inside the kiln is turned on to maintain a negative pressure value of 0.03~0.05MPa to remove free moisture from the concrete. Then, the internal temperature of the concrete is monitored in real time by an embedded temperature sensor and raised to 80℃ at a rate of 5℃ / h. During the heating process, the temperature fluctuation is controlled within ±2℃. After reaching the preset temperature, the humidity inside the kiln is maintained at ≥90% and curing is continued for 4~6 hours. After curing is completed, the temperature is lowered to room temperature at a rate of 3℃ / h, and the temperature change is continuously monitored during the cooling process. When the temperature difference between the kiln and room temperature is ≤10℃, the negative pressure device and temperature control system are turned off to complete the curing process.

[0035] S400: After the mold is removed after curing, the pole is obtained by segmented casting and molding, and the joints of each segment are fitted and reinforced.

[0036] In this embodiment, the mold after curing is removed to obtain a segmented cast pole, and the joints of each segment are fitted and reinforced. The specific process is as follows: S401: Remove the mold and grind the interface end face of the segmented pole to remove the surface laitance and loose aggregate, exposing the solid concrete base. After grinding, the flatness deviation of the interface should be ≤0.5mm to ensure that the interface fits tightly. S402: Apply epoxy resin adhesive evenly to the sanded interface, with a coating thickness of 1~2mm, and embed an annular carbon fiber reinforcing strip with a width of 50~80mm and a thickness of 3~5mm. Use hydraulic clamps to pressurize and fix it, maintaining the pressure at 0.8~1.0MPa, and keep it cured for 24 hours. S403: After the interface is repaired and the overall surface of the pole is dried, immediately spray a silane-containing nanocomposite coating. The coating particle size is controlled at 50~100nm, and a high-pressure airless spraying process is adopted. The spraying pressure is 3~5MPa, and the coating thickness is uniformly controlled at 0.8~1.2mm. After spraying, allow it to cure naturally for 2 hours to form a dense protective layer. S404: Apply a second coat of high-grade polymer cement mortar to the interface area and the surface of the pole after coating, and repair minor unevenness defects.

[0037] In the above process, the mold is first removed, and the interface end face of the segmented pole is ground to remove surface laitance and loose aggregate, exposing a solid concrete base. After grinding, the flatness deviation of the interface is ≤0.5mm to ensure a tight fit. Then, epoxy resin adhesive is evenly applied to the ground interface with a thickness of 1~2mm, and a ring-shaped carbon fiber reinforcing strip with a width of 50~80mm and a thickness of 3~5mm is embedded. It is fixed by hydraulic clamps with pressure maintained at 0.8~1.0MPa and cured for 24 hours. After the interface is repaired and the overall surface of the pole is dry, a silane-containing nanocomposite coating is immediately sprayed. The coating particle size is controlled at 50~100nm, and a high-pressure airless spraying process is used with a spraying pressure of 3~5MPa. The coating thickness is uniformly controlled at 0.8~1.2mm. After spraying, it is naturally cured for 2 hours to form a dense protective layer. Finally, a second finishing is performed on the interface area and the surface of the pole after coating spraying, and a high-grade polymer cement mortar is used to repair minor unevenness defects.

[0038] S500: Conduct quality inspections on cement poles, record any defects found during the inspection, and precisely repair any defects.

[0039] In this embodiment, the cement poles are subjected to quality inspection, the defects found during the inspection are recorded, and the defects are precisely repaired. The specific process is as follows: S501: Use an ultrasonic flaw detector to scan the pole along the entire axis with a scanning interval of ≤50mm to identify internal defects such as honeycomb, voids, and cracks. S502: The straightness and wall thickness uniformity of the utility pole are detected by a laser rangefinder, and the deviation of the straightness is ≤3‰; S503: Conduct load tests to detect flexural strength and compressive strength, and use a carbonization test chamber to test carbonization resistance. Flexural strength ≥120MPa, compressive strength ≥40MPa; S504: For micro-cracks detected, with a crack width of <0.2mm, epoxy resin grout is injected using pressure grouting method for repair. For areas with wall thickness deviation, polymer mortar is used for leveling.

[0040] In the above process, firstly, an ultrasonic flaw detector is used to scan the pole along its entire axis with a scanning interval ≤50mm to identify internal defects such as honeycomb, voids, and cracks; then, a laser rangefinder is used to check the straightness and wall thickness uniformity of the pole, with a straightness deviation ≤3‰; next, a load test is conducted to test the flexural strength and compressive strength, and a carbonization test chamber is used to test the carbonization resistance, with a flexural strength ≥120MPa and a compressive strength ≥40MPa; then, for the microcracks found during the detection, with cracks <0.2mm in width, epoxy resin grout is injected using the pressure grouting method for repair, and polymer mortar is used to level areas with wall thickness deviations.

[0041] S600: Protect cement poles as finished products and conduct factory inspections on cement poles.

[0042] In this embodiment, the cement poles are protected as finished products, and factory inspections are performed on them. The specific process is as follows: S601: Install high-strength plastic protective caps at both ends of the pole. The protective caps are fixed to the ends of the pole with snap-fit. The pole connection flange surface is treated with rust prevention and coated with two layers of rust-preventive paint. S602: Record the production parameters of each pole and generate a unique identification code; S603: Wrap the surface of the pole with flexible packaging material, affix a label in a conspicuous position on the pole, indicating the product model, specifications, production date, qualification mark and unique identification code, and complete the preparation for finished product shipment.

[0043] In the above process, firstly, high-strength plastic protective caps are installed at both ends of the pole. The protective caps are fixed to the ends of the pole with snap-fit ​​devices. The connecting flange surfaces of the pole are then treated with rust prevention by applying two layers of rust-preventive paint. Next, the production parameters of each pole (concrete mix ratio, centrifugal parameters, curing data, and test results) are recorded to generate a unique identification code. Then, flexible packaging material is used to wrap the surface of the pole, and a label is affixed to a conspicuous position on the pole, indicating the product model, specifications, production date, qualification mark, and unique identification code, thus completing the preparation for the finished product to leave the factory.

[0044] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0045] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A method for processing a ring-shaped concrete cement pole, characterized in that, Includes the following steps: Prepare graded functional concrete and pre-assemble the steel reinforcement cage; Install a detachable double mold frame, perform segmented casting, and obtain the mold through centrifugal composite molding; The cast molds are then steam-cured and subjected to a combined negative pressure dehydration treatment. After the mold is removed, the segmented cast poles are obtained, and the joints of each segment are fitted and reinforced. Conduct quality inspections on cement poles, record any defects found during the inspections, and precisely repair any defects. The cement poles are protected as finished products, and factory inspections are performed on them.

2. The method for processing ring-shaped concrete cement poles as described in claim 1, characterized in that, In the process of preparing graded functional concrete and pre-assembling the reinforcing steel cage: Cement, quartz sand, and basalt crushed stone are put into a mixer and dry-mixed for 4 minutes to make the aggregates evenly mixed. Nano silica and modified polypropylene fiber are added and mixed for 3 minutes to make the fiber evenly dispersed. Diluted water-reducing agent and water are added and mixed at high speed for 9 minutes to form gradient functional concrete with low shrinkage in the inner core and high wear resistance in the outer layer. High-strength threaded steel bars are selected as longitudinal reinforcements, and cold-rolled ribbed steel bars are used as ring stirrups. The surface of the steel bars is treated to remove rust and oil. The steel bars are cut according to the design dimensions. Positioning grooves are processed at both ends of the longitudinal reinforcements. The ring stirrups are bent into a preset arc to ensure that the dimensional accuracy deviation is ≤ ±0.3mm. A laser positioning fixture is used to build an assembly platform. The longitudinal reinforcement bars are evenly distributed around the circumference and the spacing is calibrated by a laser rangefinder, with the deviation controlled within ±0.2mm. The annular stirrups are placed on the outside of the longitudinal reinforcement bars and magnetic attraction is used for multi-point adsorption positioning. The stirrups are perpendicularly attached to the longitudinal reinforcement bars and fixed by resistance spot welding. The overall assembly accuracy of the steel reinforcement skeleton is ≤±0.5mm.

3. The method for processing ring-shaped concrete cement poles as described in claim 2, characterized in that, In the process of dry mixing cement, quartz sand, and basalt crushed stone in a mixer for 4 minutes to ensure uniform aggregate mixing, adding nano-silica and modified polypropylene fibers, mixing for 3 minutes to ensure uniform fiber dispersion, adding diluted water-reducing agent and water, and mixing at high speed for 9 minutes to form gradient functional concrete with a low-shrinkage inner core and a highly wear-resistant outer layer: The concrete mix proportions are: 320-350 parts P.O42.5 grade cement, 550-600 parts quartz sand, 750-800 parts basalt crushed stone, 6-8 parts modified polypropylene fiber, 18-20 parts nano silica, 8-10 parts polycarboxylate-based high-efficiency water-reducing agent, and 125-140 parts water.

4. The method for processing annular concrete cement poles as described in claim 1, characterized in that, In the steps of installing a detachable dual-mold frame, performing segmented casting, and obtaining the mold through centrifugal composite molding: A double-layered, detachable mold is selected. The inner layer is an inflatable rubber airbag, and the outer layer is a spliced ​​structure of 3 to 4 arc-shaped steel molds. A nano-ceramic release agent is evenly coated on the inner wall of the outer steel mold with a coating thickness of 0.1 to 0.2 mm. The inner rubber airbag is inflated to 0.3 to 0.5 MPa. After checking that the airbag has no air leakage or deformation, it is hoisted to the center position of the outer steel mold. The prefabricated steel reinforcement cage is hoisted between the inner and outer molds, and limiting brackets are installed at both ends of the cage to restrict the axial displacement of the cage. The pole is divided into three casting sections according to its length, and a segmented casting method from bottom to top is adopted. The casting height of each section is controlled within ±5mm of the design value. After the first section of pouring is completed, start the centrifuge device and centrifuge at a low speed of 300~500rpm for 1~5min to initially distribute the concrete evenly. Then centrifuge at a high speed of 1200~1500rpm for 5~15min to form a dense concrete layer. Finally, centrifuge at alternating speed pulses of 800~1200rpm for 15~20min to eliminate internal air bubbles. During the centrifugation process, the vacuum pump is started simultaneously to evacuate the inner cavity of the mold to ~0.08MPa. The air bubbles inside the concrete are accelerated to be discharged through the vent holes reserved in the mold, and the porosity of the concrete is reduced to below 2%.

5. The method for processing ring-shaped concrete cement poles as described in claim 1, characterized in that, In the step of steam curing and negative pressure dehydration combined with steam curing of the cast mold: The completed mold is moved into the steam curing kiln, the kiln door is closed for preheating, the temperature is raised to 40~50℃ at a rate of 5℃ / h and maintained for 2h, and the negative pressure device in the kiln is turned on to maintain a negative pressure value of 0.03~0.05MPa to remove free water from the inside of the concrete. The internal temperature of the concrete is monitored in real time by an embedded temperature sensor and raised to 80℃ at a rate of 5℃ / h. During the heating process, the temperature fluctuation is controlled within ±2℃. After reaching the preset temperature, the humidity inside the kiln is maintained at ≥90% and the curing is continued for 4~6 hours. After curing is completed, the temperature is reduced to room temperature at a rate of 3℃ / h, and the temperature change is continuously monitored during the cooling process. When the temperature difference between the kiln and the room temperature is ≤10℃, the negative pressure device and the temperature control system are turned off to complete the curing process.

6. The method for processing ring-shaped concrete cement poles as described in claim 1, characterized in that, In the process of removing the mold after curing to obtain the segmented cast pole, and then performing fitting and reinforcement treatment on each segment joint: Remove the mold, grind the interface end face of the segmented pole to remove surface laitance and loose aggregate, and expose a solid concrete base. After grinding, the flatness deviation of the interface is ≤0.5mm to ensure that the interface fits tightly. Apply epoxy resin adhesive evenly to the sanded interface, with a coating thickness of 1-2 mm, and embed an annular carbon fiber reinforcing strip with a width of 50-80 mm and a thickness of 3-5 mm. Use hydraulic clamps to pressurize and fix the strip, maintaining the pressure at 0.8-1.0 MPa, and let it cure for 24 hours. After the interface is repaired and the overall surface of the pole is dried, a silane-containing nanocomposite coating is immediately sprayed. The coating particle size is controlled at 50~100nm, and a high-pressure airless spraying process is used with a spraying pressure of 3~5MPa. The coating thickness is uniformly controlled at 0.8~1.2mm. After spraying, it is naturally cured for 2 hours to form a dense protective layer. The interface area and the surface of the pole after coating are then finished with a second layer of plaster, and high-grade polymer cement mortar is used to repair minor unevenness.

7. The method for processing ring-shaped concrete cement poles as described in claim 1, characterized in that, In the process of quality inspection of cement poles, recording the defects found during the inspection, and accurately repairing the defects: An ultrasonic flaw detector is used to scan the pole along the entire axis with a scanning interval of ≤50mm to identify internal defects such as honeycomb, voids, and cracks. The straightness and wall thickness uniformity of the utility poles were tested using a laser rangefinder, and the deviation in straightness was ≤3‰. Load tests were conducted to detect flexural and compressive strength. Carbonation resistance was tested using a carbonation test chamber. Flexural strength ≥120MPa, compressive strength ≥40MPa. For the micro-cracks found during the inspection, with a crack width of <0.2mm, epoxy resin grout was injected using the pressure grouting method for repair. For areas with wall thickness deviation, polymer mortar was used for leveling.

8. The method for processing ring-shaped concrete cement poles as described in claim 1, characterized in that, In the steps of protecting cement poles as finished products and conducting factory inspections on cement poles: High-strength plastic protective caps are installed at both ends of the pole. The protective caps are fixed to the ends of the pole with snap-fit. The pole connection flange surface is treated with rust prevention and coated with two layers of rust-preventive paint. Record the production parameters of each pole and generate a unique identification code; The surface of the utility pole is wrapped with flexible packaging material, and a label is affixed to a conspicuous position on the pole, indicating the product model, specifications, production date, qualification mark and unique identification code, thus completing the preparation for the finished product to leave the factory.

9. The method for processing annular concrete cement poles as described in claim 8, characterized in that, In the steps of recording the production parameters of each utility pole and generating a unique identifier: Production parameters include concrete mix proportions, centrifugation parameters, curing data, and test results.

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