High-strength concrete centrifugal forming device for ring-shaped concrete electric pole

Abstract

The application relates to the technical field of annular concrete pole processing, and relates to a high-strength concrete centrifugal forming device for annular concrete poles, which comprises a base and fixing holes, the inner wall of the base is processed with the fixing holes, the inner wall of the base is installed with rollers, and the outer wall of the roller is movably connected with a lower mold. The servo motor of a centrifugal mechanism drives a gear to engage a tooth ring, the lower mold is driven by an insertion block to rotate at high speed on the roller to complete centrifugal forming, the hoop locking mold guarantees firm mold closing, the inner cylinder of a feeding mechanism cooperates with a feeding head to uniformly feed, the drainage holes discharge redundant water, the concrete compactness is improved, the gear synchronously drives a reciprocating lead screw, drives a sliding block and a push block, the moving inner cylinder uniformly distributes materials outward, a reinforcing steel bar placement ring positions a reinforcing steel framework, the centrifugal forming and demolding share a servo motor, power components are reduced, the structure is compact, the mold is convenient to disassemble and assemble, and the annular concrete pole forming quality and production efficiency are improved.

Description

Technical Field

[0001] This invention relates to the technical field of annular concrete pole processing, specifically to a centrifugal molding device for high-strength concrete annular concrete poles. Background Technology

[0002] During the production and processing of ring-shaped concrete poles, concrete slurry needs to be injected into the mold. Relying on centrifugal molding technology, the concrete slurry is made to adhere tightly to the inner wall of the mold cavity under high-speed rotation, expelling excess water, increasing the density of the concrete, and ensuring the strength of the pole.

[0003] While existing centrifugal molding devices for concrete poles have solved the problem of the reinforcing cage swaying within the upper and lower molds during centrifugation, the aforementioned devices rely on blind holes in a disc to limit the crossbars of the reinforcing cage. The fixed position of these blind holes makes it difficult to adapt to reinforcing cages of different specifications for ring-shaped poles, and the positioning accuracy of the reinforcing cage is prone to deviation. Furthermore, the lack of a concrete distribution and guiding structure inside the mold leads to uneven concrete material distribution after pouring, which can easily cause wall thickness deviations during centrifugal rotation. This results in air pockets and pitted surfaces on the molded pole, reducing the overall molding quality of the ring-shaped concrete pole. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that existing centrifugal molding devices for concrete poles often result in air holes and pitted surfaces after molding, which reduces the overall molding quality of annular concrete poles. Therefore, this invention proposes a high-strength concrete centrifugal molding device for annular concrete poles.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a centrifugal molding device for high-strength concrete ring-shaped concrete poles, comprising a base and fixing holes, wherein fixing holes are machined on the inner wall of the base, rollers are installed on the inner wall of the base, the outer wall of the rollers is movably connected to a lower mold, the outer wall of the lower mold is fitted with a clamp, and a centrifugal mechanism is connected to the outer wall of the base.

[0006] This configuration: The base is fixed to the entire machine through the fixing holes, the rollers support the lower mold to reduce the frictional resistance of the mold at high speed, and the upper and lower molds are locked together by the clamps to form the pole forming mold cavity.

[0007] Preferably, the centrifugal mechanism includes a connecting frame, the outer wall of the connecting frame is fixedly connected to the base, the inner wall of the connecting frame is rotatably connected to the connecting ring, the outer wall of the connecting ring is fixedly connected to the gear ring, the lower end of the gear ring meshes with a gear, the outer wall of the gear is rotatably connected to the connecting frame, the outer wall of the gear is fixedly connected to the output shaft of the servo motor, the outer wall of the connecting frame is equipped with a servo motor, and the outer wall of the connecting ring is fixedly connected to the insert block.

[0008] This setting: The servo motor drives the gear to rotate, the gear meshes with the gear ring to drive the connecting ring to rotate, the plug on the connecting ring inserts into the mold, and drives the entire mold to rotate at high speed to achieve centrifugal operation. The connecting frame provides installation support for each rotating part, and the rollers cooperate to share the weight of the mold and ensure stable operation at high speed.

[0009] Preferably, the inner wall of the groove of the lower mold is pressed against the reinforcing bar placement ring, and the inner wall of the reinforcing bar placement ring is connected to a feeding mechanism.

[0010] This setting: The evenly spaced holes on the rebar placement ring are used to position and install the rebar skeleton, ensuring that the rebar skeleton is centered inside the mold cavity. The feeding mechanism extends into the mold to realize the injection and distribution of concrete slurry.

[0011] Preferably, the feeding mechanism includes an inner cylinder, the outer wall of which is movably connected to a reinforcing bar placement ring, one end of which is threadedly connected to a feeding head, the other end of which is fixedly connected to a push rod, and the surface of the inner cylinder is machined with drainage holes.

[0012] This feature allows the push rod to push the inner cylinder into the mold cavity. Concrete slurry is then fed into the inner cylinder through the injection head and evenly distributed outwards. The injection head continues to inject slurry at the correct position. Excess water generated by centrifugation can be discharged outwards through the drainage hole, improving the density of the concrete and ensuring the forming strength of the pole. The injection head has a threaded connection, making disassembly and replacement convenient.

[0013] Preferably, the base surface groove is slidably connected to the slider, and the inner wall of the slider is fixedly connected to the push block by a pin.

[0014] This setting: The slider slides along the base groove, driving the push block to move. The push block is used to push the molded pole out of the mold.

[0015] Preferably, the inner wall of the slider is threadedly connected to the reciprocating lead screw, and the end of the reciprocating lead screw is fixedly connected to a gear.

[0016] This setting: the gear rotates while driving the reciprocating screw to rotate synchronously, and the screw drives the slider to perform linear reciprocating motion; the centrifugal rotation and demolding share the same servo motor power, reducing the number of motors and lowering equipment costs.

[0017] Preferably, the outer wall of the other end of the reciprocating screw is rotatably connected to the base.

[0018] This setting ensures that the reciprocating screw is supported at both ends, resulting in smooth rotation, reduced screw wobbling, and stable slider movement.

[0019] Preferably, the outer wall of the insert block is inserted into the slot machined by the lower mold.

[0020] This feature: The insert block is inserted into the lower mold slot to achieve torque transmission between the connecting ring and the mold, driving the mold to rotate synchronously; the plug-in structure is easy to assemble and disassemble, facilitating mold hoisting and disassembly.

[0021] The present invention proposes a centrifugal molding device for high-strength concrete ring-shaped concrete poles. The advantages are as follows: the centrifugal mechanism uses a servo motor to drive a gear meshing ring, which in turn drives the lower mold to rotate at high speed on rollers via an insert block to complete the centrifugal process. A clamping hoop locks the mold to ensure secure mold closing. The inner cylinder of the feeding mechanism, in conjunction with the injection head, evenly injects material, while drainage holes remove excess water, improving concrete density. The gear synchronously drives a reciprocating screw, which in turn drives a slider and a pusher block, causing the moving inner cylinder to evenly distribute material outwards. A reinforcing bar placement ring positions the reinforcing bar skeleton. The centrifugal process and demolding share a servo motor, reducing the number of power components. The structure is compact, and the mold is easy to assemble and disassemble, thus improving the molding quality and production efficiency of the ring-shaped concrete poles. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Schematic diagram of the middle base structure; Figure 3 for Figure 1 Schematic diagram of the middle and lower mold structure; Figure 4 for Figure 1 Schematic diagram of the centrifuge mechanism; Figure 5 for Figure 1 Schematic diagram of the infeed mechanism; Figure 6 for Figure 5 Schematic diagram of the inlet head structure.

[0023] In the diagram: 1. Base, 2. Fixing hole, 3. Roller, 4. Lower mold, 5. Clamp, 6. Centrifugal mechanism, 601. Connecting frame, 602. Connecting ring, 603. Gear ring, 604. Gear, 605. Servo motor, 606. Insert block, 7. Rebar placement ring, 8. Feeding mechanism, 801. Inner cylinder, 802. Injection head, 803. Push rod, 804. Drain hole, 9. Slider, 10. Push block, 11. Reciprocating screw. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings: Please see Figure 1-6In this embodiment, a centrifugal molding device for high-strength concrete ring-shaped concrete poles includes a base 1 and a fixing hole 2. The fixing hole 2 is machined on the inner wall of the base 1. Rollers 3 are installed on the inner wall of the base 1. The outer wall of the rollers 3 movably supports the lower mold 4. The outer wall of the lower mold 4 is fitted with a clamp 5. The outer wall of the base 1 is connected to a centrifugal mechanism 6.

[0025] The centrifugal mechanism 6 includes a connecting frame 601, the outer wall of which is fixedly connected to the base 1. A connecting ring 602 is rotatably mounted on the inner wall of the connecting frame 601. A gear ring 603 is fixed on the outer wall of the connecting ring 602. A gear 604 meshes with the lower end of the gear ring 603. The gear 604 is rotatably connected to the connecting frame 601. The output shaft of a servo motor 605 is fixedly connected to the outer wall of the gear 604. The servo motor 605 is mounted on the outer wall of the connecting frame 601. An insert block 606 is also fixed on the outer wall of the connecting ring 602. During operation, the servo motor 605 starts and drives the gear 604 to rotate. The gear 604 meshes with the gear ring 603, driving the connecting ring 602 to rotate synchronously. The insert block 606 rotates accordingly and inserts into the corresponding slot at the bottom of the lower mold 4, thereby transmitting torque to the lower mold 4 and driving it to rotate at high speed on the roller 3, realizing the centrifugal molding of concrete slurry. In actual assembly operations, the base, as the load-bearing structure of the entire equipment, needs to withstand the weight of the mold itself, the weight of the concrete material, and the alternating vibration load generated under high-speed centrifugal conditions. Therefore, the base is made of thick steel plates welded together during the manufacturing process. After welding, it undergoes stress relief treatment to eliminate residual stress generated during the welding process and prevent slight deformation of the base after long-term operation, which could lead to misalignment of the roller installation position and affect the coaxiality of the mold rotation. The multiple fixing holes on the base are not simple through holes. During on-site installation, high-strength anchor bolts are used to firmly lock the base onto the precast concrete foundation of the equipment. The foundation must be leveled in advance to ensure that the upper surface of the base is horizontal. If the base is tilted, the high-speed rotation of the mold will cause swaying, which will not only accelerate the wear of the rollers and the outer wall of the mold, but also cause the pole wall to be thicker on one side and thinner on the other after centrifugal forming, directly resulting in product scrap.

[0026] The rollers are arranged symmetrically in two sets on the base. Wear-resistant rolling bearings are installed inside the rollers, and high-temperature lithium-based grease is applied to the bearing positions. Due to the high dust levels in the pole production workshop, concrete debris can easily splash into the bearing gaps. Therefore, simple dustproof rings are added to both ends of the rollers to prevent external dust and debris from entering the bearings, extending the service life of the roller assembly. The outer surface of the rollers is hardened to increase surface hardness. When the mold rotates at high speed, the outer wall of the lower mold directly presses against the two sets of rollers. The rollers must bear the entire weight of the mold, its internal steel reinforcement, and the concrete slurry, while also reducing the rolling friction resistance during mold rotation to prevent excessive rotational resistance from overloading the servo motor.

[0027] The clamps are segmented arc-shaped steel structures. The clamps are fastened at the joint between the lower and upper molds. Each clamp is equipped with fastening bolts at both ends. After the mold is closed, the operators tighten the bolts in a diagonal sequence, and do not lock them on one side at once to prevent local warping of the mold joint. If the mold joint is not sealed properly, the fluid concrete slurry will leak out from the gap during centrifugal operation, causing material shortage gaps on the outer wall of the pole. At the same time, the leaked concrete slurry splashes onto the rollers, gear rings and gear surfaces, and after solidification, forms hard lumps, which will damage the meshing accuracy of the gear teeth and accelerate the wear of the transmission components.

[0028] The servo motor 605 of the centrifugal mechanism 6 drives the gear 604 to mesh with the gear ring 603. The lower mold 4 is driven by the insert block 606 to rotate at high speed on the roller 3 to complete the centrifugation. The clamp 5 locks the mold to ensure a secure mold closing. The inner cylinder 801 of the feeding mechanism 8 works with the injection head 802 to evenly inject material. The drainage hole 804 drains excess water and improves the density of the concrete. The gear 604 synchronously drives the reciprocating screw 11, which drives the slider 9 and the push block 10 to make the moving inner cylinder evenly distribute material outward. The rebar placement ring 7 positions the rebar skeleton. The centrifugation and demolding share the same servo motor 605, reducing the number of power components, making the structure compact, and the mold easy to disassemble and assemble, which helps to improve the molding quality and production efficiency of the ring concrete pole.

[0029] The connecting frame in the centrifugal mechanism is fixed to the side of the base by a combination of welded bolts. The connecting frame also undergoes stress relief treatment to ensure the relative positional accuracy of the servo motor, gears, and the mounting holes of the connecting ring. The connecting ring is fitted onto the positioning step of the connecting frame, and a large-diameter thrust rolling bearing is installed between the two. When the mold rotates at high speed, it will generate axial movement force. The thrust bearing can withstand the axial impact force, preventing the connecting ring from shifting axially and ensuring that the meshing clearance between the gear ring and the gear remains stable.

[0030] The gear ring is fastened to the outer end face of the connecting ring with high-strength bolts. The gear ring is forged from alloy steel and then machined with teeth. The surface of the teeth is hardened by quenching. The gear and gear ring mesh with each other to transmit power. The torque output by the servo motor is amplified by the gear and gear ring and then drives the entire mold to rotate. The actual production centrifugal process is divided into three stages: low-speed material spreading, medium-speed transition, and high-speed compaction. The servo motor can accurately output different speeds. In the low-speed stage, the speed is relatively low, mainly to make the mold rotate slowly, so that the concrete slurry injected into the mold cavity is initially spread out, avoiding the slurry from accumulating in a local area of ​​the mold at one time. In the medium-speed stage, the speed is gradually increased, and the concrete slurry slowly adheres to the inner wall of the mold under the action of centrifugal force. In the high-speed stage, the high speed is maintained, and the strong centrifugal force squeezes out the free water trapped in the concrete, allowing the concrete aggregate to be squeezed and tightly bonded together, thereby improving the strength of the pole body.

[0031] The insert is welded and fixed to the end face of the connecting ring. Two inserts are symmetrically distributed, and their shape matches the slot at the end of the lower mold. After the mold is hoisted into place, the slot directly aligns with the insert to complete the insertion and torque transmission. This plug-in transmission structure eliminates the need to disassemble the transmission connector when changing to different lengths of pole molds. A crane can be used to lift the old mold and hoist the new mold in, aligning the insert with the new one, significantly reducing mold changeover time. During production, the insert and slot are frequently subjected to impact torque. A wear-resistant alloy layer is deposited on the surface of the insert to reduce wear from repeated insertion and rotation. If the wear gap of the insert is too large, impact noise will occur during transmission, and in severe cases, the gear ring may be damaged. Regular maintenance requires periodic inspection of the insert wear dimensions; if wear exceeds the standard, timely welding repair is necessary.

[0032] The inner wall of the groove of the lower mold 4 is pressed against the rebar placement ring 7. The inner wall of the rebar placement ring 7 is connected to the feeding mechanism 8. The feeding mechanism 8 includes an inner cylinder 801. The outer wall of the inner cylinder 801 is movably connected to the rebar placement ring 7. The purpose of the rebar placement ring 7 is to circumferentially position the internal rebar skeleton of the pole to ensure that it remains centered during concrete pouring and centrifugation. The end of the inner cylinder 801 is threadedly connected to the injection head 802. The other end of the inner cylinder 801 is fixed with a push rod 803. A drainage hole 804 is opened on the surface of the inner cylinder 801.

[0033] The rebar placement ring is a ring-shaped disc with multiple evenly spaced positioning through holes. The main reinforcing bars of the pole's reinforcing cage can pass through these holes sequentially. The rebar placement ring constrains the position of the reinforcing cage, preventing displacement or shifting during concrete pouring and high-speed centrifugal rotation. This avoids quality defects such as insufficient concrete cover thickness in the pole after molding. Traditional equipment's rebar cages can mostly only fix a single specification of cage. The rebar placement ring in this device is an independent, detachable accessory, manufactured in various sizes and distributions of holes to produce poles with different diameters and numbers of main reinforcing bars. Simply replace the corresponding model of rebar placement ring, embedding it directly into the groove at the end of the lower mold for immediate use. Disassembly and replacement are simple and do not require modification of the mold itself.

[0034] After the reinforcing bar placement ring is embedded in the groove, it is positioned by its end face. During centrifugal operation, it is subjected to friction and impact from the concrete slurry and will not rotate or shift arbitrarily. The inner cylinder of the feeding mechanism passes through the central hole of the reinforcing bar placement ring and can slide back and forth along the axial direction. The inner cylinder is made of seamless steel pipe, and multiple sets of long strip-shaped drainage holes are opened on the cylinder wall, which are evenly distributed along the axial direction of the cylinder body. After the concrete slurry is fed into the inner cylinder cavity from the injection head, it flows outward into the mold cavity through the openings on the cylinder body. The push rod is connected to the external drive component. When the operator pushes the push rod, it can drive the entire inner cylinder to move axially along the inner cavity of the mold. During the movement, it continuously discharges material outward, so that the concrete slurry can be evenly distributed along the entire length of the mold, and there will be no material accumulation at one end of the mold.

[0035] The injection head and the inner cylinder end are connected by threads. In actual production, injection heads with different discharge diameters can be used for concrete slurries with different fluidities. The threads make disassembly and assembly very convenient. When the inside of the injection head is blocked by concrete lumps, it can be directly unscrewed to clean the internal blockage material without disassembling the entire feeding mechanism. During the centrifugal operation, the concrete is squeezed by centrifugal force to release excess free water. The water can pass through the concrete layer and enter the inner cylinder through the drainage holes, and then be discharged outwards from the mold cavity along the inner cylinder channel, reducing the water content inside the concrete and lowering the probability of air pockets and honeycomb defects after the pole solidifies. It is important to note that the opening size of the drainage holes should not be too large. If the opening diameter is too large, the fine sand and gravel aggregate inside the concrete will easily flow out with the water, causing concrete material loss. If the opening diameter is too small, drainage will be obstructed, and the dewatering effect will not be achieved. The size of the drainage holes must be strictly controlled during processing.

[0036] The base 1 has a sliding groove on its surface that connects to the slider 9. The inner wall of the slider 9 is fixed to the push block 10 by a pin. The inner wall of the slider 9 is threaded to the reciprocating screw 11. One end of the reciprocating screw 11 is fixedly connected to the gear 604, and the outer wall of the other end of the reciprocating screw 11 is rotatably connected to the base 1. The outer wall of the insert block 606 is inserted into the slot of the lower mold 4.

[0037] The groove on the top surface of the base is precision machined by milling. The two side walls of the groove are flat and smooth. The slider is assembled in the groove. The groove guides and limits the slider, ensuring that the slider can only move back and forth in a straight line along the groove and will not deflect laterally.

[0038] The push block is detachably mounted on the end face of the slider via a pin. The push block can also be replaced with different shapes and sizes to fit pole ends of different outer diameters. The pins are easy to install and remove; when the push block wears and deforms due to prolonged pushing against the pole end face, it can be replaced simply by pulling out the pin. One end of the reciprocating screw and the gear are fastened together with a flat key. When the servo motor drives the gear to rotate, the reciprocating screw and gear rotate synchronously, eliminating the need for a separate drive motor. This integrates centrifugal rotation power and demolding pushing force, reducing the configuration of power components such as motors and reducers, lowering equipment procurement costs. Simultaneously, the overall pipeline layout is simpler, the overall structure is more compact, and the equipment occupies less space in the workshop.

[0039] The other end of the reciprocating screw is rotatably supported on the other end of the base via a bearing seat. Both ends of the screw are rotatably supported, ensuring smooth rotation during operation and reducing vibration and deflection during high-speed rotation. The screw groove of the reciprocating screw is a reciprocating helical track. When the screw rotates in the forward direction, the slider moves along the groove towards the mold, driving the push block forward to complete the demolding and ejection operation of the electric rod. The screw continues to rotate in the same direction. After the slider completes its helical stroke, it automatically reverses and returns to the initial standby position. The reciprocating motion of the slider can be achieved without changing the rotation direction of the servo motor.

[0040] The actual demolding process is as follows: After the pole centrifugation molding is completed and the concrete reaches the initial hardening condition, the equipment stops high-speed centrifugal operation. The operator loosens all clamps, lifts the upper mold, and the servo motor runs at low speed, driving the reciprocating screw to rotate. The slider drives the push block forward, and the push block smoothly presses against the end face of the pole, slowly pushing the molded pole out of the lower mold cavity. The pushing speed is controlled by the servo motor speed. The pushing speed cannot be too fast; if the impact force is too large, the pole body, which is not yet fully cured, is prone to cracking and damage. The entire demolding action and centrifugation operation share the same servo motor, relying on different speed modes of the servo motor to complete the centrifugal molding and demolding processes respectively. During routine maintenance, concrete dust can easily fall into the reciprocating screw helical groove, requiring regular cleaning and application of lubricating grease to prevent dust from accumulating and causing the slider to jam, resulting in the push block being unable to move forward or backward normally.

[0041] Working principle: When assembling the high-strength concrete centrifugal molding device for ring-shaped concrete poles, the base 1 is used as the basic carrier. The entire machine is installed and fixed using the fixing holes 2 on the base 1. The rollers 3 are assembled onto the inner wall of the base 1 to support the lower mold 4. The connecting frame 601 of the centrifugal mechanism 6 is fixed onto the outer wall of the base 1. The connecting ring 602 is rotatably installed inside the connecting frame 601. The toothed ring 603 is fixed on the outer side of the connecting ring 602. The gear 604 is rotatably assembled onto the connecting frame 601 so that the gear 604 and the toothed ring 603 mesh with each other. The servo motor 605 is installed on the outer wall of the connecting frame 601. The output shaft of the servo motor 605 is connected to the gear 604. The insert block 606 is fixed on the outer wall of the connecting ring 602.

[0042] During equipment assembly, components should be assembled sequentially from bottom to top, starting with the base parts and then moving to the transmission parts. The transmission mechanism should not be assembled before the base support components to prevent damage to precision transmission parts during assembly. After the base is placed on the equipment foundation, the level of the base's upper surface should be repeatedly calibrated using a level. Once the level meets the technical requirements, anchor bolts should be inserted through the fixing holes and tightened. After tightening, the level parameters should be checked again to prevent slight warping or deformation of the base during the tightening process. After the rollers are installed in their positions on the base, the top surface height of both rollers needs to be checked to ensure they are on the same horizontal plane. The height error must be controlled within the allowable range; if the two rollers are not the same height, the lower mold will tilt when placed on it.

[0043] When assembling the centrifugal mechanism components, first, tighten the connecting frame onto the positioning reference surface on the side of the base with bolts to ensure the verticality of the connecting frame installation. Then, assemble the connecting ring and the matching thrust bearing. Before installing the bearing, evenly fill the rolling element position with grease. Next, fix the gear ring onto the end face of the connecting ring. When assembling the gear, carefully adjust the meshing clearance between the gear and the gear ring. The meshing clearance should not be too large or too small. If the clearance is too small, the transmission resistance will be high, easily causing overheating and burning of parts. If the clearance is too large, the transmission operation will have high impact noise, and the tooth surface is prone to pitting damage. After the adjustment is satisfactory, tighten the mounting bolts of the servo motor to ensure that the servo motor output shaft and the gear are coaxial, avoiding damage to the motor caused by additional radial force on the output bearing. After the insert block assembly is completed, simulate the mold insertion condition by aligning the spare mold slot with the insert block for a trial insertion to check whether the insert block and slot are aligned smoothly and whether there is any jamming or interference.

[0044] The clamp 5 is fitted and installed on the outside of the lower mold 4. The rebar placement ring 7 is pressed into the groove of the lower mold 4. The feeding mechanism 8 is assembled. The inner cylinder 801 is movably connected to the rebar placement ring 7. One end of the inner cylinder 801 is threaded with the injection head 802, and the other end is fixed with the push rod 803. The surface of the inner cylinder 801 is reserved with drainage holes 804. The slider 9 is installed in the slide groove of the base 1. The push block 10 is fixed on the slider 9 by the pin. One end of the reciprocating screw 11 is connected to the gear 604, and the other end is rotatably supported on the base 1. The slider 9 is threadedly engaged with the reciprocating screw 11. Finally, the insert block 606 is inserted into the slot of the lower mold 4 to complete the assembly of the whole machine.

[0045] In the assembly of mold-related components, the clamps are pre-fitted onto the outside of the lower mold, and lubricant is applied to the opening and closing rotating parts of the clamps to ensure smooth opening and closing. The rebar placement ring is embedded into the groove at the end of the lower mold, relying on the end face of the groove for axial positioning. After checking that the rebar placement ring is not loose or wobbly, subsequent assembly is carried out. When assembling the feeding mechanism, the thread of the injection head is first tightened to the end of the inner cylinder. A small amount of high-temperature resistant anti-seize agent can be applied to the thread to prevent the threads from being corroded by concrete moisture later, making it impossible to unscrew the injection head. The push rod and the inner cylinder are connected by welding. The weld is ground smooth. During the process of the push rod pushing the inner cylinder back and forth, the push rod needs to withstand axial thrust. The weld must ensure welding quality to prevent cracking during operation.

[0046] During the assembly process of the reciprocating lead screw, first insert the end of the lead screw away from the gear into the bearing seat of the base, and then connect the other end of the lead screw to the gear with a key. The key must be fully embedded in the keyway without any looseness. After completion, manually rotate the gear and observe the rotation state of the lead screw. The lead screw should rotate smoothly without any jamming, and the slider should be able to slide smoothly back and forth along the slide groove as the lead screw rotates, without any jamming or stuck phenomenon. After confirming that all parts are assembled in place, conduct a no-load test run of the equipment. During the no-load test run, test the servo motor at low speed, medium speed, and high speed in sequence, observe the operating status of all moving parts such as rollers, gear rings, lead screw, and slider, and check for any abnormal phenomena such as abnormal noise, vibration, or overheating. Only after all indicators meet the requirements can the equipment be put into production with material.

[0047] When the equipment is put into use, the steel reinforcement cage is first positioned on the steel reinforcement placement ring 7. After the mold is closed, the clamp 5 is locked and the push rod 803 is pushed to send the inner cylinder 801 of the feeding mechanism 8 into the mold cavity. The concrete slurry is fed into the inner cylinder 801 through the injection head 802 to complete the material distribution. The servo motor 605 is started, which drives the gear 604, gear ring 603 and connecting ring 602 to rotate. The insert block 606 drives the lower mold 4 to rotate at high speed on the roller 3 to carry out centrifugal operation. Excess water is discharged from the drainage hole 804 to improve the density of the concrete. At the same time, the gear 604 drives the reciprocating screw 11 to rotate, which can drive the slider 9 and push block 10 to move linearly. After the molding is completed, the clamp 5 is released. The entire set of equipment shares the power of the servo motor 605 for centrifugal rotation and uniform injection. The structure is compact and meets the molding and processing requirements of ring concrete poles.

[0048] During formal production, the pre-processed and bundled steel reinforcement cage is first hoisted to the end of the mold. The main bars of the steel reinforcement cage are then passed through the positioning holes on the steel reinforcement placement ring. The steel reinforcement cage is then placed in place along the mold cavity, and the steel reinforcement placement ring constrains its position, ensuring that the steel reinforcement cage is centered in the mold cavity. This ensures that the protective layer thickness of the steel reinforcement in the subsequently cast pole is uniform. After the steel reinforcement cage is placed, the upper mold is hoisted and fastened onto the lower mold. The closing stop of the upper and lower molds is aligned, and the clamps at each position are fastened in sequence. The clamp fastening bolts are tightened gradually in a diagonal order to ensure that the upper and lower molds fit tightly and the gaps between the molds are sealed to prevent grout leakage during centrifugal operation.

[0049] After the mold is closed and locked, the operator pushes the push rod to send the inner cylinder of the entire feeding mechanism into the mold cavity through the middle hole of the reinforcing bar placement ring. After the inner cylinder is pushed to the far end of the mold, the external concrete delivery pipeline is connected to the injection head to pump concrete slurry. The slurry enters the inner cylinder cavity through the injection head. The operator slowly pulls back the push rod, causing the inner cylinder to slowly move backward along the mold axis. The concrete slurry flows out continuously from the drainage hole of the inner cylinder body, and the material is evenly distributed along the entire length of the mold. The moving speed of the material distribution and the concrete pumping flow rate are matched to prevent excessive or insufficient slurry in some places. After the material feeding process is completed, the servo motor is started and the centrifugal process is executed in sequence, with low-speed material feeding, medium-speed transition, and high-speed compaction. The mold rotates at high speed on the rollers by relying on the torque transmitted by the insert blocks. The strong centrifugal force drives the concrete slurry to stick tightly to the inner wall of the mold. The free water inside the concrete is squeezed out and enters the inner cylinder through the concrete layer. It is discharged out of the mold along the inner cylinder, reducing the water content inside the concrete, increasing the density of the concrete, and reducing the probability of air holes and pitting defects on the pole.

[0050] While the mold is centrifugally rotating, the gears continuously drive the reciprocating screw to rotate synchronously. The slider follows the screw in a reciprocating motion. At this time, the slider is in a retracted standby position, and the pusher block is away from the mold end face, so it will not interfere with the centrifugal forming process. After the entire centrifugal process is completed, the servo motor stops high-speed output, and the mold speed gradually decreases until it stops rotating completely. After waiting for the concrete inside the mold cavity to complete its initial solidification and hardening, the operator loosens the fastening bolts on each set of clamps in turn, disassembles and removes the clamp components, and uses a crane to lift it off the upper mold. Then, the servo motor is switched to low-speed mode, driving the reciprocating screw to rotate. The slider moves forward smoothly with the pusher block. After the pusher block contacts the end face of the electric rod, it slowly applies a pushing force to push the formed electric rod out of the lower mold cavity. After demolding is completed, the servo motor continues to rotate, and the reciprocating screw drives the slider and pusher block to automatically return to the initial standby position, waiting for the next processing cycle.

[0051] Throughout the entire production and processing process, the centrifugal rotation and demolding pushing actions are all powered by the same servo motor, eliminating the need for an additional demolding drive motor. This simplifies the overall power system, reduces equipment failure rates, and makes the overall structure more compact, making it ideal for the continuous mass production of ring-shaped concrete poles. After each batch of products is produced, routine maintenance is required. This includes cleaning concrete residue and dust from the rollers, gear rings, and lead screw gaps; replenishing lubricating grease at all rotating lubrication points; and checking the wear condition of easily worn parts such as inserts, clamps, and push blocks. Parts with excessive wear should be repaired or replaced promptly to ensure long-term stable operation of the equipment.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A centrifugal molding device for high-strength concrete ring-shaped concrete poles, comprising a base (1) and a fixing hole (2), wherein the fixing hole (2) is machined on the inner wall of the base (1), characterized in that: The inner wall of the base (1) is equipped with rollers (3), the outer wall of the rollers (3) is movably connected to the lower mold (4), the outer wall of the lower mold (4) is in contact with the clamp (5), and the outer wall of the base (1) is connected to a centrifugal mechanism (6).

2. The centrifugal molding device for high-strength concrete ring-shaped concrete poles according to claim 1, characterized in that: The centrifugal mechanism (6) includes a connecting frame (601), the outer wall of the connecting frame (601) is fixedly connected to the base (1), the inner wall of the connecting frame (601) is rotatably connected to the connecting ring (602), the outer wall of the connecting ring (602) is fixedly connected to the gear ring (603), the lower end of the gear ring (603) meshes with the gear (604), the outer wall of the gear (604) is rotatably connected to the connecting frame (601), the outer wall of the gear (604) is fixedly connected to the output shaft of the servo motor (605), the outer wall of the connecting frame (601) is equipped with the servo motor (605), and the outer wall of the connecting ring (602) is fixedly connected to the insert block (606).

3. The centrifugal molding device for high-strength concrete ring-shaped concrete poles according to claim 1, characterized in that: The inner wall of the groove processed by the lower mold (4) abuts against the reinforcing bar placement ring (7), and the inner wall of the reinforcing bar placement ring (7) is connected to the feeding mechanism (8).

4. The centrifugal molding device for high-strength concrete ring-shaped concrete poles according to claim 3, characterized in that: The feeding mechanism (8) includes an inner cylinder (801), the outer wall of the inner cylinder (801) is movably connected to the reinforcing bar placement ring (7), the end of the inner cylinder (801) is threadedly connected to the injection head (802), the other end of the inner cylinder (801) is fixedly connected to the push rod (803), and the surface of the inner cylinder (801) is machined with drainage holes (804).

5. The centrifugal molding device for high-strength concrete ring-shaped concrete poles according to claim 1, characterized in that: The base (1) has a sliding groove on its surface that is slidably connected to the slider (9), and the inner wall of the slider (9) is fixedly connected to the push block (10) by a pin.

6. The centrifugal molding device for high-strength concrete ring-shaped concrete poles according to claim 5, characterized in that: The inner wall of the slider (9) is threadedly connected to the reciprocating screw (11), and the end of the reciprocating screw (11) is fixedly connected to the gear (604).

7. The centrifugal molding device for high-strength concrete ring-shaped concrete poles according to claim 6, characterized in that: The outer wall of the other end of the reciprocating screw (11) is rotatably connected to the base (1).

8. The centrifugal molding device for high-strength concrete ring-shaped concrete poles according to claim 2, characterized in that: The outer wall of the insert (606) is inserted into the slot processed by the lower mold (4).

Images