Large cement culvert pipe forming device

Abstract

The invention relates to a large cement culvert pipe forming device, and belongs to the technical field of cement culvert pipe forming. Comprising a center column, a bottom supporting ring is arranged at the lower end of the center column, the center column is sleeved with a forming cylinder, and the area between the forming cylinder and the center column is a cement pipe forming cavity; a supporting frame is rotationally arranged above the center column through a rotating mechanism, a conveying belt assembly is slidably arranged in the supporting frame through a sliding mechanism, a feeding frame is fixedly arranged at the end of the conveying belt assembly, and a lower end outlet of the feeding frame is located at an upper end opening of the cement pipe forming cavity; a central gear is fixedly arranged at the lower end of the supporting frame, a circle of vertical rotating rods are rotationally arranged in the central column, a driven gear is fixedly arranged at the upper end of each rotating rod, and all the driven gears are located on the outer side of the periphery of the central gear; an impact block is fixedly arranged on the outer side of the rotating rod through an elastic arm; the problem that cement consumption of different parts of finished products formed by existing cement culvert pipes is different is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of cement culvert pipe forming, and particularly relates to a large cement culvert pipe forming device. Background Art

[0002] A cement culvert pipe is a pipe buried underground, usually cast from reinforced concrete, with various shapes such as circular, oval, rectangular, etc., and can be divided into drainage culvert pipes, irrigation culvert pipes, cross-road culvert pipes, etc. It has strong corrosion resistance and a long service life.

[0003] The forming of a cement culvert pipe is a key link in its production process, which determines the shape and quality of the culvert pipe. Usually, ordinary Portland cement is mixed with aggregates, and the mold is the key equipment for forming. It is usually composed of a steel cylindrical mold with a smooth inner wall to reduce the demolding resistance. The mixed concrete is poured into the mold, and after forming, demolding and curing are carried out to prepare the required cement culvert pipe.

[0004] The structure of the traditional cement culvert pipe forming device is relatively simple. It often only encloses a forming groove for the cement culvert pipe through the structure, and then injects cement into it, waiting for forming or extrusion forming. This easily leads to different amounts of cement used in different parts of the finished cement culvert pipe, reducing the strength of the finished product. At the same time, the traditional structure also lacks technical means for completely demolding the cement culvert pipe.

[0005] Therefore, the present invention provides a large cement culvert pipe forming device. Summary of the Invention

[0006] The present invention overcomes the deficiencies of the prior art and provides a large cement culvert pipe forming device, solving the problem that the amounts of cement used in different parts of the finished product after the forming of the current cement culvert pipe are different.

[0007] In order to achieve the above object, the present invention is realized by the following technical solutions.

[0008] A large-scale cement culvert forming device, including a central column. A bottom support ring is arranged at the lower end of the central column. A forming cylinder is sleeved outside the central column. The area between the forming cylinder and the central column is the cement pipe forming cavity. Above the central column, a support frame is rotatably arranged through a slewing mechanism. Inside the support frame, a conveyor belt assembly is slidably arranged through a sliding mechanism. A feeding frame is fixedly arranged at the end of the conveyor belt assembly. The lower end outlet of the feeding frame is located at the upper end opening of the cement pipe forming cavity. A central gear is fixedly arranged at the lower end of the support frame. Inside the central column, a circle of vertical rotating rods is rotatably arranged. A driven gear is fixedly arranged at the upper end of each rotating rod. All the driven gears are located on the outer sides around the central gear. Impact blocks are fixedly arranged on the outer sides of the rotating rods through elastic arms. The conveyor belt assembly includes a fixed frame and a conveyor belt. The fixed frame is slidably inserted inside the support frame. A conveyor belt is rotatably arranged inside the fixed frame. The feeding frame is fixedly arranged at the end of the fixed frame. The feeding frame is a square box structure with openings at both the upper and lower ends. The upper end opening of the feeding frame corresponds to the end of the conveyor belt. On the left and right sides of the lower end opening of the feeding frame, a spring tube is respectively fixedly arranged. A spring is respectively arranged inside each spring tube. A sliding groove is respectively arranged on the side wall of each spring tube. A deflecting plate is slidably arranged at the lower end opening of the feeding frame. A set of connecting arms is respectively arranged at the left and right ends of the deflecting plate. The lower ends of the two sets of connecting arms are fixedly connected to the deflecting plate. The upper ends of the two sets of connecting arms respectively pass through the sliding grooves on both sides and extend into the two spring tubes. The upper ends of the two sets of connecting arms respectively contact the ends of the springs inside the two spring tubes.

[0009] Further, the central column is a vertically arranged cylindrical structure, the bottom support ring is a horizontally arranged circular ring structure, the inner diameter of the bottom support ring is equal to the outer diameter of the central column, and the bottom support ring is slidably arranged on the lower end of the outer side of the central column. The forming cylinder is a cylindrical structure with openings at both the upper and lower ends. The forming cylinder is arranged at the upper end of the bottom support ring. A connecting valve is arranged in a circle between the lower end of the outer side of the forming cylinder and the outer edge of the bottom support ring.

[0010] Further, a fixed support arm is arranged above the forming cylinder. A feeding frame is fixedly arranged at the end of the support arm. The support frame is a square box structure open at both the front and rear ends. A circular feeding port penetrating up and down is arranged at the center of the top plate of the support frame. The lower end opening of the feeding frame is rotatably clamped inside the feeding port. The feeding port on the support frame can slide vertically relative to the lower end opening of the feeding frame.

[0011] Further, the slewing mechanism includes a slewing motor, a driving gear, and a driven gear ring. A driven gear ring is fixedly arranged on the outer side of the upper end of the feeding port of the support frame. A fixed ring is fixedly sleeved on the outer side of the feeding frame. A slewing motor is fixedly arranged on the fixed ring. A driving gear is fixedly arranged on the output shaft of the slewing motor. The driving gear meshes with the driven gear ring.

[0012] Furthermore, the sliding mechanism includes a sliding motor and a driving wheel; a horizontal driving groove is provided in the middle of the outer side surfaces on the left and right sides of the fixed frame, sliding motors are fixedly provided on the outer side surfaces on the left and right sides of the support frame, the output shaft of the sliding motor extends into the support frame, and a driving wheel is fixedly provided on the output shaft of the sliding motor; the two driving wheels are in close contact with the inner bottom surfaces of the two driving grooves respectively.

[0013] Furthermore, a storage groove is provided on the upper end surface of the central column, a sealing cover is rotatably provided at the upper opening of each storage groove, and an attached vibration motor is fixedly provided inside the storage groove.

[0014] Furthermore, a knocking cavity is provided inside the central column, a plurality of upper sliding grooves arranged in a circular array are provided between the inner top surface of the knocking cavity and the upper end surface of the central column, a plurality of lower sliding grooves arranged in a circular array are provided at the inner bottom surface of the knocking cavity, and the plurality of upper sliding grooves and the plurality of lower sliding grooves are in one-to-one correspondence up and down; the same rotating rod is provided inside each set of corresponding upper sliding grooves and lower sliding grooves, a telescopic spring telescopic rod is fixedly provided inside each upper sliding groove, a sleeve is fixedly provided at the telescopic end of the spring telescopic rod, and the rotating rod inside the upper sliding groove is rotatably inserted into the inner side of the sleeve.

[0015] Furthermore, a plurality of vertical impact columns are fixedly provided at the lower end of the inner wall of the knocking cavity, and the impact columns are located on one side of the rotating rod; a plurality of horizontal elastic arms are fixedly provided on the outer side surface of each rotating rod, and the impact block is fixedly provided at the end of the elastic arm far away from the rotating rod.

[0016] Furthermore, a pressing groove is provided at the center of the upper end surface of the central column, a pressing rod is slidably inserted vertically in the pressing groove, the upper end of the pressing rod is located outside the upper end surface of the central column and is in contact with the lower end surface of the central gear; three connecting holes are provided on the side wall of the pressing groove, and the three connecting holes are respectively communicated with the three upper sliding grooves; a connecting rope is slidably arranged in each connecting hole; a connecting ring is fixedly sleeved on the outer side of the pressing rod, one ends of the three connecting ropes are fixedly connected to the connecting ring, and the other ends of the three connecting ropes are respectively fixedly connected to the sleeves inside the three upper sliding grooves.

[0017] The beneficial effects of the present invention compared with the prior art are as follows: 1. A large-scale cement culvert forming device according to the present invention transports cement raw materials to the end through a conveyor belt. After the cement raw materials are transported to the feeding frame at the end, they will be discharged from the bottom of the feeding frame and fall into the cement pipe forming cavity. The conveyor belt is controlled to rotate around the central axis of the central column, so that the feeding frame moves in a circular motion along the annular cement pipe forming cavity, thereby enabling the cement raw materials to be evenly filled into the cement pipe forming cavity. After filling, the conveyor belt is moved away from above the central column; a ring with the same shape as the vertical section of the cement pipe forming cavity can be used to press down from top to bottom to compact the cement in the cement pipe forming cavity; after the cement hardens, equipment such as a gantry crane is used to lift the forming cylinder upwards. The forming cylinder lifts the bottom support ring and the hardened cement culvert upwards, separating the cement culvert from the central column, and the central column remains in its original position. After transferring the forming cylinder to the cement culvert curing area, the fixation of multiple connection valves is released to separate the forming cylinder from the bottom support ring, and then the forming cylinder is lifted upwards. At this time, the forming cylinder is separated from the cement culvert and the bottom support ring, and the bottom support ring still remains at the bottom of the cement culvert. After the cement culvert is cured to the usable stage, the cement culvert is lifted upwards to be separated from the bottom support ring. Through the above structural settings, not only the function of making large-volume cement culverts in a process flow is realized, but also during the preparation process, the uniform filling effect of the cement material is ensured, and the finished product quality of the cement culvert is guaranteed.

[0018] 2. A large-scale cement culvert forming device according to the present invention. During the rotation of the feeding frame, the cement raw materials will be stacked layer by layer in a spiral shape into the cement pipe forming cavity. However, due to the unstable amount of cement raw materials input from the outside, sometimes less and sometimes more, in order to ensure that the cement raw materials stacked in each layer are basically the same and improve the quality of the cement culvert, a slidable offset plate is provided at the bottom of the feeding frame. When the conveyor belt does not rotate, the offset plate will return to its original position under the action of the spring, so that the cement in the feeding frame cannot be discharged; at the beginning, part of the cement raw materials are first injected into the feeding frame for stacking, and then the conveyor belt rotates at a constant speed to allow the cement to be discharged into the cement pipe forming cavity at a constant amount. When the external feeding amount decreases, the rotation speed of the conveyor belt is reduced. At this time, the offset plate will block part of the outlet of the feeding frame under the action of the spring, reducing the size of the feeding port. However, since the rotation speed of the conveyor belt is slowed down, the amount of cement discharged in one rotation of the conveyor belt remains unchanged, only reducing the forming speed of the cement culvert; through this setting, it is ensured that during the production of the cement culvert, the forming quality will not be reduced due to changes in the conveying amount of the cement raw materials, and the adjustment of the offset plate depends on the change in the speed of the conveyor belt, without the need for manual adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings: Figure 1 It is a schematic structural diagram of the whole of the present invention; Figure 2 It is a schematic structural diagram of the storage slot; Figure 3 It is a schematic connection diagram of the forming cylinder, bottom support ring and central column; Figure 4 It is a schematic connection diagram among the support arm, support frame, slewing mechanism, sliding mechanism and feeding frame; Figure 5 It is a schematic connection diagram between the support frame, conveyor belt assembly and feeding frame; Figure 6 It is a schematic connection diagram between the feeding frame and the offset plate; Figure 7 It is a schematic connection diagram between the support frame and the rotating rod; Figure 8 It is a schematic connection diagram among the rotating rod, pressing rod, connecting rope and spring telescopic rod; Among them, 1 is the forming cylinder, 2 is the bottom support ring, 3 is the connecting valve, 4 is the central column, 5 is the support arm, 6 is the feeding frame, 7 is the conveyor belt, 8 is the feeding hopper, 9 is the storage slot, 10 is the sealing cover, 12 is the offset plate, 13 is the support frame, 15 is the slewing motor, 16 is the driving groove, 17 is the sliding motor, 18 is the driven gear ring, 19 is the bottom plate, 20 is the driving gear, 21 is the spring tube, 23 is the connecting arm, 24 is the central gear, 25 is the pressing rod, 26 is the driven gear, 27 is the rotating rod, 28 is the sleeve, 29 is the impact column, 30 is the impact block, 31 is the elastic arm, 32 is the spring telescopic rod. Specific embodiments

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail in combination with the embodiments and the drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solutions of the present invention will be described in detail below in combination with the embodiments and the drawings, but the protection scope is not limited by this.

[0021] Such as Figure 1-8As shown in the figure, the present invention provides a large-scale cement culvert forming device, which includes a central column 4. A bottom support ring 2 is arranged at the lower end of the central column 4. A forming cylinder 1 is sleeved outside the central column 4. The area between the forming cylinder 1 and the central column 4 is a cement pipe forming cavity. Above the central column 4, a support frame 13 is rotatably arranged through a slewing mechanism. Inside the support frame 13, a conveyor belt assembly is slidably arranged through a sliding mechanism. A feeding frame 6 is fixedly arranged at the end of the conveyor belt assembly. The lower outlet of the feeding frame 6 is located at the upper opening of the cement pipe forming cavity. At the lower end of the support frame 13, a central gear 24 is fixedly arranged. Inside the central column 4, a circle of vertical rotating rods 27 is rotatably arranged. At the upper end of each rotating rod 27, a driven gear 26 is fixedly arranged. All the driven gears 26 are located on the outer sides around the central gear 24. On the outer side of the rotating rod 27, an impact block 30 is fixedly arranged through an elastic arm 31.

[0022] The central column 4 is a vertically arranged cylindrical structure. The bottom support ring 2 is a horizontally arranged circular ring structure. The inner diameter of the bottom support ring 2 is equal to the outer diameter of the central column 4. The bottom support ring 2 is slidably arranged on the lower end of the outer side surface of the central column 4. The forming cylinder 1 is a cylindrical structure with openings at both the upper and lower ends. The forming cylinder 1 is arranged at the upper end of the bottom support ring 2 and is coaxially arranged with the central column 4. Between the lower end of the outer side surface of the forming cylinder 1 and the outer edge of the bottom support ring 2, a circle of connection valves 3 arranged in a circular array is provided. Through the connection valves 3, the forming cylinder 1 and the bottom support ring 2 can be detachably connected.

[0023] Above the forming cylinder 1, a fixed support arm 5 is arranged. At the end of the support arm 5, a feeding frame 8 with a thick upper part and a thin lower part is fixedly arranged. The axis of the feeding frame 8 coincides with the axis of the central column 4. The support frame 13 is a square box structure with openings at both the front and rear ends. At the center of the top plate of the support frame 13, a circular feeding port penetrating up and down is arranged. The lower opening of the feeding frame 8 is rotatably clamped inside the feeding port, so that the support frame 13 can rotate relative to the feeding frame 8. At the same time, the feeding port on the support frame 13 can slide in the vertical direction relative to the lower opening of the feeding frame 8.

[0024] The slewing mechanism includes a slewing motor 15, a driving gear 20, and a driven gear ring 18. On the outer side of the upper end of the feeding port of the support frame 13, a driven gear ring 18 is fixedly arranged. Outside the feeding frame 8, a fixed ring is sleeved. On the fixed ring, a slewing motor 15 is fixedly arranged. The output shaft of the slewing motor 15 is vertically downward, and a driving gear 20 is fixedly arranged on the output shaft of the slewing motor 15. The driving gear 20 meshes with the driven gear ring 18. When the slewing motor 15 drives the driving gear 20 to rotate, since the driving gear 20 meshes with the driven gear ring 18 and the driven gear ring 18 is fixed on the support frame 13, the support frame 13 is driven to perform horizontal slewing.

[0025] The conveyor belt assembly includes a fixed frame, a driving pulley, a driven pulley, a conveyor belt 7, and a conveyor motor. The fixed frame is kept horizontal and is slidably inserted into the interior of the support frame 13. The lower ends of the left and right side end faces of the fixed frame are respectively in sliding contact with the lower ends of the left and right inner walls of the support frame 13, so as to ensure the stable sliding of the fixed frame inside the support frame 13. A driving pulley and a driven pulley are respectively rotatably arranged at both ends of the fixed frame, and the conveyor belt 7 is sleeved between the driving pulley and the driven pulley. A conveyor motor is fixedly arranged at one end of the fixed frame, and the output shaft of the conveyor motor is fixedly connected to the driving pulley. The driving pulley is driven to rotate by the conveyor motor, and the driving pulley and the driven pulley drive the conveyor belt 7 to act.

[0026] The sliding mechanism includes a sliding motor 17 and a driving wheel. A horizontal driving groove 16 is arranged in the middle of the outer side surfaces on the left and right sides of the fixed frame. Sliding motors 17 are fixedly arranged on the outer side surfaces of the left and right sides of the support frame 13. The output shafts of the sliding motors 17 extend into the interior of the support frame 13, and driving wheels are fixedly arranged on the output shafts of the sliding motors 17. The two driving wheels are respectively in close contact with the inner bottom surfaces of the two driving grooves 16. The sliding motor 17 drives the driving wheel to rotate, and the driving wheel drives the fixed frame to slide, so as to drive the conveyor belt assembly to slide inside the support frame 13, and further adjust the position of the feeding frame 6, so that the feeding frame 6 can adapt to the cement pipe forming cavities with different diameters.

[0027] At the end of the fixed frame, the feeding frame 6 is fixedly arranged. The feeding frame 6 is a square box structure with openings at both the upper and lower ends. The upper opening of the feeding frame 6 corresponds to the end of the conveyor belt 7, and the materials on the conveyor belt 7 can smoothly enter the interior of the upper opening of the feeding frame 6. On the left and right sides of the lower opening of the feeding frame 6, a horizontal spring tube 21 is fixedly arranged respectively. The length direction of the spring tube 21 is parallel to the conveying direction of the conveyor belt 7; a spring is arranged inside each spring tube 21; a sliding groove is arranged on the side wall of each spring tube 21, and the length direction of the sliding groove is parallel to the length direction of the spring tube 21. A deflection plate 12 is slidably arranged at the lower opening of the feeding frame 6. A set of connecting arms 23 are arranged at the left and right ends of the deflection plate 12 respectively. The lower ends of the two sets of connecting arms 23 are fixedly connected to the deflection plate 12, and the upper ends of the two sets of connecting arms 23 respectively pass through the sliding grooves on both sides and extend into the two spring tubes 21. The upper ends of the two sets of connecting arms 23 are respectively in contact with the ends of the springs inside the two spring tubes 21. When the deflection plate 12 is not subjected to centrifugal force, under the action of the restoring force of the springs on both sides, the deflection plate 12 closes the lower opening of the feeding frame 6; when the deflection plate 12 is subjected to different centrifugal forces, the deflection plate 12 slides different distances towards the side away from the conveyor belt assembly, and the lower opening of the feeding frame 6 is in an open state and maintains different opening degrees. An upward bending part is fixedly arranged at the end of the deflection plate 12 away from the conveyor belt assembly, and the bending part is used to ensure that the deflection plate 12 does not come out from the side of the feeding frame 6 close to the conveyor belt assembly. A plurality of counterweights are also fixedly arranged at the end of the deflection plate 12 away from the conveyor belt assembly, and the counterweights are assembled to adjust the centrifugal effect received by the deflection plate 12.

[0028] A circular array of storage grooves 9 is arranged on the upper end surface of the central column 4. A sealing cover 10 is rotatably arranged at the upper opening of each storage groove 9, and an attached vibration motor is fixedly arranged inside the storage groove 9. During operation, the attached vibration motor stored in the storage groove 9 can generate vibration on the central column 4, so as to vibrate the filled cement raw materials, and further improve the forming quality of the cement culvert.

[0029] Inside the central column 4, there is a knocking cavity. Between the inner top surface of the knocking cavity and the upper end surface of the central column 4, there are three upper sliding grooves arranged in a circular array. At the inner bottom surface of the knocking cavity, there are three lower sliding grooves arranged in a circular array. The three upper sliding grooves and the three lower sliding grooves are vertically corresponding one by one. The length directions of the upper sliding grooves and the lower sliding grooves are both arranged along the radial direction of the central column 4. Inside each set of corresponding upper sliding groove and lower sliding groove, there is the same rotating rod 27. The rotating rod 27 slides along the length directions of the upper sliding groove and the lower sliding groove. At the same time, the rotating rod 27 can rotate while sliding inside the upper sliding groove and the lower sliding groove. Inside each upper sliding groove, there is a telescopic spring telescopic rod 32 fixedly arranged. The spring telescopic rod 32 is fixedly arranged on the inner wall of the upper sliding groove on the side of the rotating rod 27 away from the axis of the central column 4. The telescopic end of the spring telescopic rod 32 is fixedly provided with a sleeve 28. The rotating rod 27 inside the upper sliding groove is rotatably inserted into the inner side of the sleeve 28. The telescopic direction of the spring telescopic rod 32 is parallel to the length direction of the upper sliding groove.

[0030] The central gear 24 is fixedly arranged at the center of the lower end surface of the bottom plate 19 of the support frame 13.

[0031] When the spring telescopic rod 32 is not subjected to an external force, the spring telescopic rod 32 is in a contracted state. Under the action of the spring telescopic rod 32, the rotating rod 27 is in the direction away from the axis of the central column 4 inside the upper sliding groove, and the driven gear 26 at the upper end of the rotating rod 27 is disengaged from the central gear 24. When the spring telescopic rod 32 is subjected to an external force towards the axis of the central column 4, the spring telescopic rod 32 is in an extended state. The rotating rod 27 overcomes the elastic force of the spring telescopic rod 32 and is in the direction close to the axis of the central column 4 inside the upper sliding groove. The driven gear 26 at the upper end of the rotating rod 27 is engaged with the central gear 24.

[0032] At the lower end of the inner wall of the knocking cavity, there are three vertically arranged impact columns 29 arranged in a circular array. The three impact columns 29 are respectively located on the side of the three rotating rods 27 away from the axis of the central column 4. On the outer side surface of each rotating rod 27, there are three horizontally arranged elastic arms 31 arranged in a circular array. The impact block 30 is fixedly arranged at the end of the elastic arm 31 away from the rotating rod 27.

[0033] A pressing groove is provided at the center of the upper end surface of the central column 4. A pressing rod 25 is slidably inserted vertically inside the pressing groove. The upper end of the pressing rod 25 is located outside the upper end surface of the central column 4 and is in contact with the lower end surface of the central gear 24. Three connection holes are provided on the side wall of the pressing groove, and the three connection holes are respectively communicated with three upper sliding grooves; a connecting rope is slidably arranged inside each connection hole. A connection ring is fixedly sleeved outside the pressing rod 25. One end of each of the three connecting ropes is fixedly connected to the connection ring, and the other ends of the three connecting ropes are respectively fixedly connected to the sleeves 28 inside the three upper sliding grooves.

[0034] The working principle of the present invention is as follows: First, the metal cage required for the formation of the cement culvert is placed into the cement pipe forming cavity from top to bottom. Then, the rotary motor 15 and the conveyor motor are started, and at the same time, the cement raw materials are put into the feeding frame 8. The cement raw materials pass through the feeding frame 8 and the feeding ports on the support frame 13 and fall onto the conveyor belt 7. The conveyor motor drives the conveyor belt 7 to run, and the conveyor belt 7 conveys the cement raw materials to the inside of the feeding frame 6 at the end. The rotary motor 15 drives the driving gear 20 to rotate. Since the driving gear 20 meshes with the driven gear ring 18, and the driven gear ring 18 is rotatably sleeved outside the feeding frame 8, the driving gear 20 drives the driven gear ring 18 to rotate around the feeding frame 8; since the driven gear ring 18 is fixed outside the feeding port of the support frame 13, the driven gear ring 18 drives the support frame 13 to also rotate around the feeding frame 8; when the support frame 13 rotates, it drives the conveyor belt assembly inside it to rotate synchronously, and the conveyor belt assembly drives the feeding frame 6 to rotate around the feeding frame 8. When the feeding frame 6 rotates horizontally, the offset plate 12 is affected by the centrifugal force, so as to overcome the elastic force of the spring inside the spring tube 21 and slide in a direction away from the axis of the central column 4, thereby opening the opening at the lower end of the feeding frame 6, and the cement raw materials are output from the lower opening of the feeding frame 6 and enter the inside of the cement pipe forming cavity. As the support frame 13 and the conveyor belt assembly continuously rotate horizontally, the feeding frame 6 moves in a circular motion along the annular cement pipe forming cavity, so that the cement raw materials can be stacked layer by layer in a spiral shape into the cement pipe forming cavity.

[0035] Due to the unstable amount of cement raw materials input from the outside, sometimes less and sometimes more, in order to ensure that the cement raw materials stacked in each layer are basically the same and improve the quality of the cement culvert, a slidable offset plate 12 is provided at the bottom of the feeding frame 6. When the conveyor belt 7 does not rotate, the offset plate 12 will return to its original position under the action of the spring, so that the cement in the feeding frame 6 cannot be discharged; at the beginning, part of the cement raw materials are first injected into the feeding frame 6 for stacking, and then the conveyor belt 7 rotates at a constant speed to let the cement be discharged into the cement pipe forming cavity in a constant amount. When the external feeding amount decreases, the rotation speed of the conveyor belt 7 is reduced. At this time, the offset plate 12 will block part of the outlet of the feeding frame 6 under the action of the spring, making the feeding port smaller. However, since the rotation speed of the conveyor belt 7 is slowed down, the amount of cement discharged in one rotation of the conveyor belt 7 remains unchanged, only the forming speed of the cement culvert is reduced; through this setting, it is ensured that during the production of the cement culvert, the forming quality will not be reduced due to the change in the conveying amount of the cement raw materials, and the adjustment of the offset plate 12 depends on the speed change of the conveyor belt 7, without manual adjustment. It should be noted that when the rotation speed of the conveyor belt 7 needs to be adjusted due to the reduction of the cement raw material input amount, it is necessary to ensure that there is always a certain amount of cement raw materials stacked in the feeding frame 6, so as to ensure that the amount of cement raw materials discharged from the feeding frame 6 is only affected by the size of the opening at the bottom of the feeding frame 6; that is to say, it is necessary to ensure that the external cement raw material input amount is always greater than the discharge amount of the feeding frame 6. If necessary, the rotation of the conveyor belt 7 can also be stopped.

[0036] When cement raw materials fall on the conveyor belt 7, the overall weight of the conveyor belt assembly becomes larger, thereby driving the support frame 13 and the entire conveyor belt assembly to slide downward. The bottom plate 19 of the support frame 13 drives the central gear 24 to slide downward, and the central gear 24 drives the pressing rod 25 to slide downward inside the pressing groove. The pressing rod 25 drives the ends of the three connecting ropes connected to the connecting rings to slide downward inside the pressing groove, so that the connecting ropes are pulled towards the end of the pressing rod 25. The three connecting ropes pull the three sleeves 28 to slide towards the side close to the axis of the central column 4 inside the upper sliding groove, and the three sleeves 28 drive the three rotating rods 27 to slide towards the side close to the axis of the central column 4 inside the upper sliding groove, so that the driven gears 26 at the upper ends of the three rotating rods 27 gradually approach the central gear 24 and mesh with the central gear 24. Since the slewing mechanism drives the support frame 13 to rotate, the support frame 13 drives the central gear 24 to rotate, the central gear 24 drives the three driven gears 26 to rotate synchronously, the three driven gears 26 drive the three rotating rods 27 to rotate, and the three rotating rods 27 drive the elastic arms 31 and the impact blocks 30 to rotate. During the rotation of the impact block 30, it will impact the impact column 29 to generate a large vibration. After the impact, the elastic arm 31 deforms, allowing the impact block 30 to frictionally cross the impact column 29 and wait for the next impact, so as to generate a large degree of vibration effect and improve the function of vibrating the cement raw materials.

[0037] During the process of the support frame 13 and the entire conveyor belt assembly sliding downward, the driving gear 20 and the driven gear ring 18 are always in a meshed state.

[0038] After filling, the conveyor belt 7 is moved away from above the central column 4. A ring with the same shape as the vertical section of the cement pipe forming cavity can be used to press down from top to bottom to compact the cement in the cement pipe forming cavity. After the cement hardens, equipment such as a gantry crane is used to lift the forming cylinder 1 upward. The forming cylinder 1 drives the bottom support ring 2 and the hardened cement culvert pipe upward, separating the cement culvert pipe from the central column 4, and the central column 4 remains in its original position. After the forming cylinder 1 is transferred to the cement culvert pipe curing area, the fixing of multiple connecting valves 3 is released to separate the forming cylinder 1 from the bottom support ring 2. Then the forming cylinder 1 is lifted upward. At this time, the forming cylinder 1 is separated from the cement culvert pipe and the bottom support ring 2, and the bottom support ring 2 still remains at the bottom of the cement culvert pipe. After the cement culvert pipe is cured to a usable stage, the cement culvert pipe is lifted upward to be separated from the bottom support ring 2. Through the above structural settings, not only the function of making large-volume cement culvert pipes in a process flow manner is realized, but also during the preparation process, the uniform filling effect of the cement material is ensured, and the finished product quality of the cement culvert pipe is ensured.

[0039] When no more cement raw materials fall on the conveyor belt 7, the weight of the conveyor belt assembly decreases. Under the action of their resilience, the three spring telescopic rods 32 drive the rotating rod 27 to slide away from the axis of the central column 4 inside the upper sliding groove. The sleeves 28 outside the three rotating rods 27 pull the three connecting ropes outward, and the three connecting ropes pull the pressing rod 25 upward, causing the pressing rod 25 to slide upward inside the pressing groove to return to its initial position. Since the three rotating rods 27 slide away from the axis of the central column 4 inside the upper sliding groove, the three driven gears 26 are disengaged from the central gear 24, the rotating rod 27 stops rotating, and no longer knocks on the impact column 29.

[0040] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A large-scale cement culvert forming device, characterized in that: It includes a central column (4). A bottom support ring (2) is provided at the lower end of the central column (4). A forming cylinder (1) is sleeved outside the central column (4). The area between the forming cylinder (1) and the central column (4) is the cement pipe forming cavity. Above the central column (4), a support frame (13) is rotatably arranged through a slewing mechanism. Inside the support frame (13), a conveyor belt assembly is slidably arranged through a sliding mechanism. At the end of the conveyor belt assembly, a feeding frame (6) is fixedly arranged. The lower end outlet of the feeding frame (6) is located at the upper end opening of the cement pipe forming cavity. At the lower end of the support frame (13), a central gear (24) is fixedly arranged. Inside the central column (4), a vertical rotating rod (27) is rotatably arranged in a circle. At the upper end of each rotating rod (27), a driven gear (26) is fixedly arranged. All the driven gears (26) are located on the outer sides around the central gear (24). On the outer side of the rotating rod (27), an impact block (30) is fixedly arranged through an elastic arm (31). The conveyor belt assembly includes a fixed frame and a conveyor belt (7). The fixed frame is slidably inserted inside the support frame (13). Inside the fixed frame, the conveyor belt (7) is rotatably arranged. At the end of the fixed frame, the above-mentioned feeding frame (6) is fixedly arranged. The feeding frame (6) is a square box structure with openings at both the upper and lower ends. The upper end opening of the feeding frame (6) corresponds to the end of the conveyor belt (7). On the left and right sides of the lower end opening of the feeding frame (6), a spring tube (21) is respectively fixedly arranged. Inside each spring tube (21), a spring is respectively arranged. On the side wall of each spring tube (21), a sliding groove is respectively arranged. At the lower end opening of the feeding frame (6), a deflection plate (12) is slidably arranged. At the left and right ends of the deflection plate (12), a set of connecting arms (23) are respectively arranged. The lower ends of the two sets of connecting arms (23) are fixedly connected to the deflection plate (12). The upper ends of the two sets of connecting arms (23) respectively pass through the sliding grooves on both sides and extend into the two spring tubes (21). The upper ends of the two sets of connecting arms (23) are respectively in contact with the ends of the springs inside the two spring tubes (21).

2. A large cement culvert forming device according to claim 1, characterized in that: The central column (4) is a vertically arranged cylindrical structure. The bottom support ring (2) is a horizontally arranged circular ring structure. The inner diameter of the bottom support ring (2) is equal to the outer diameter of the central column (4). The bottom support ring (2) is slidably arranged on the lower end of the outer side of the central column (4). The forming cylinder (1) is a cylindrical structure with openings at both the upper and lower ends. The forming cylinder (1) is arranged above the bottom support ring (2). A connecting valve (3) is arranged in a circle between the lower end of the outer side of the forming cylinder (1) and the outer edge of the bottom support ring (2).

3. A large cement culvert forming device according to claim 1, characterized in that: Above the forming cylinder (1), a fixed support arm (5) is arranged. At the end of the support arm (5), a feeding frame (8) is fixedly arranged. The support frame (13) is a square box structure open at both the front and rear ends. At the center of the top plate of the support frame (13), a circular feeding port that penetrates up and down is arranged. The lower end opening of the feeding frame (8) is rotatably clamped inside the feeding port. The feeding port on the support frame (13) can slide in the vertical direction relative to the lower end opening of the feeding frame (8).

4. A large cement culvert forming device according to claim 3, characterized in that: The slewing mechanism includes a slewing motor (15), a driving gear (20), and a driven gear ring (18); the driven gear ring (18) is fixedly arranged on the outer side of the upper end of the feeding port of the support frame (13), a fixed ring is fixedly sleeved on the outer side of the feeding frame (8), the slewing motor (15) is fixedly arranged on the fixed ring, the driving gear (20) is fixedly arranged on the output shaft of the slewing motor (15), and the driving gear (20) meshes with the driven gear ring (18).

5. A large cement culvert forming device according to claim 3, characterized in that: The sliding mechanism includes a sliding motor (17) and a driving wheel; a horizontal driving groove (16) is arranged in the middle of the outer side surfaces of the left and right sides of the fixed frame, the sliding motors (17) are fixedly arranged on the outer side surfaces of the left and right sides of the support frame (13), the output shafts of the sliding motors (17) extend into the interior of the support frame (13), and the driving wheels are fixedly arranged on the output shafts of the sliding motors (17); the two driving wheels are in close contact with the inner bottom surfaces of the two driving grooves (16) respectively.

6. A large-scale cement culvert pipe forming device according to claim 1, characterized in that: A storage groove (9) is arranged on the upper end surface of the central column (4), a sealing cover (10) is rotatably arranged at the upper end opening of each storage groove (9), and an attached vibration motor is fixedly arranged inside the storage groove (9).

7. A large-scale cement culvert forming device according to claim 1, characterized in that: A knocking cavity is arranged inside the central column (4), a plurality of upper sliding grooves arranged in a circular array are arranged between the inner top surface of the knocking cavity and the upper end surface of the central column (4), a plurality of lower sliding grooves arranged in a circular array are arranged at the inner bottom surface of the knocking cavity, and the plurality of upper sliding grooves and the plurality of lower sliding grooves are in one-to-one vertical correspondence; the same rotating rod (27) is arranged inside each group of corresponding upper and lower sliding grooves, a telescopic spring telescopic rod (32) is fixedly arranged inside each upper sliding groove, the telescopic end of the spring telescopic rod (32) is fixedly provided with a sleeve (28), and the rotating rod (27) inside the upper sliding groove is rotatably inserted into the inner side of the sleeve (28).

8. A large-scale cement culvert forming device according to claim 7, characterized in that: A plurality of vertical impact columns (29) are fixedly arranged at the lower end of the inner wall of the knocking cavity, and the impact columns (29) are located on one side of the rotating rod (27); a plurality of horizontal elastic arms (31) are fixedly arranged at the lower end of the outer side surface of each rotating rod (27), and the impact block (30) is fixedly arranged at the end of the elastic arm (31) far away from the rotating rod (27).

9. A large-scale cement culvert forming device according to claim 7, characterized in that: A pressing groove is arranged at the center of the upper end surface of the central column (4), a pressing rod (25) is slidably inserted along the vertical direction inside the pressing groove, the upper end of the pressing rod (25) is located outside the upper end surface of the central column (4) and is in contact with the lower end surface of the central gear (24); three connecting holes are arranged on the side wall of the pressing groove, and the three connecting holes are respectively communicated with the three upper sliding grooves; a connecting rope is slidably arranged inside each connecting hole; a connecting ring is fixedly sleeved on the outer side of the pressing rod (25), one ends of the three connecting ropes are fixedly connected with the connecting ring, and the other ends of the three connecting ropes are respectively fixedly connected with the sleeves (28) inside the three upper sliding grooves.

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