A large cement pipe forming device

Abstract

This invention relates to a large-scale cement culvert forming device, belonging to the field of cement culvert forming technology. It includes a central column with a bottom support ring at its lower end, and a forming cylinder sleeved on the outside of the central column. The area between the forming cylinder and the central column is the cement pipe forming cavity. A support frame is rotatably mounted above the central column via a rotary mechanism. Inside the support frame, a conveyor belt assembly is slidably mounted via a sliding mechanism. A feeding frame is fixedly mounted at the end of the conveyor belt assembly, with its lower outlet located at the upper opening of the cement pipe forming cavity. A central gear is fixedly mounted at the lower end of the support frame. A ring of vertical rotating rods is rotatably mounted inside the central column, with a driven gear fixedly mounted at the upper end of each rotating rod. All driven gears are located around the central gear. Impact blocks are fixedly mounted on the outside of the rotating rods via elastic arms. This invention solves the problem of inconsistent cement usage in different parts of the finished cement culvert after forming.

Description

Technical Field

[0001] This invention belongs to the field of cement culvert forming technology, specifically relating to a large-scale cement culvert forming device. Background Technology

[0002] Cement culverts are pipes buried underground, usually made of reinforced concrete. They come in various shapes such as round, elliptical, and rectangular, and can be divided into drainage culverts, irrigation culverts, and road crossing culverts. They are highly corrosion-resistant and have a long service life.

[0003] The molding of cement culverts is a crucial step in their production process, determining their shape and quality. Ordinary silicate cement is typically used in combination with aggregates. The mold is the key equipment for molding, usually consisting of a steel cylindrical mold with a smooth inner wall to reduce demolding resistance. The mixed concrete is poured into the mold, and after molding, it is demolded and cured to produce the desired cement culvert.

[0004] Traditional cement culvert molding devices have a relatively simple structure. They often simply create a molding groove for the cement culvert, then pour cement into it and wait for it to be molded or extruded. This can easily lead to different amounts of cement used in different parts of the finished cement culvert, reducing the strength of the finished product. At the same time, traditional structures also lack the technical means to completely demold the cement culvert.

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

[0006] This invention overcomes the shortcomings of the prior art and proposes a large-scale cement culvert forming device; it solves the problem that the amount of cement used in different parts of the finished cement culvert is different.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution.

[0008] A large cement culvert forming device includes a central column, a bottom support ring at the lower end of the central column, and a forming cylinder sleeved on the outer side of the central column. The area between the forming cylinder and the central column is the cement pipe forming cavity. A support frame is rotatably mounted above the central column via a rotary mechanism. A conveyor belt assembly is slidably mounted inside the support frame via a sliding mechanism. A feeding frame is fixedly mounted at the end of the conveyor belt assembly, and the lower outlet of the feeding frame is located at the upper opening of the cement pipe forming cavity. A central gear is fixedly mounted at the lower end of the support frame. A ring of vertical rotating rods is rotatably mounted inside the central column. A driven gear is fixedly mounted at the upper end of each rotating rod, and all driven gears are located around the outer perimeter of the central gear. An impact block is fixedly mounted on the outer side of the rotating rods via an elastic arm. The conveyor belt assembly includes a fixed frame and a conveyor belt. The fixed frame slides... The movable part is inserted into the support frame, and a conveyor belt is rotatably installed inside the fixed frame. The delivery frame is fixedly installed at the end of the fixed frame. The delivery frame is a square box structure with openings at both the top and bottom. The upper opening of the delivery frame corresponds to the end of the conveyor belt. A spring tube is fixedly installed on the left and right sides of the lower opening of the delivery frame. A spring tube is installed inside each spring tube. A sliding groove is provided on the side wall of each spring tube. An offset plate is slidably installed at the lower opening of the delivery frame. A set of connecting arms is provided on the left and right ends of the offset plate. The lower ends of the two sets of connecting arms are fixedly connected to the offset plate. The upper ends of the two sets of connecting arms extend through the sliding grooves on both sides into the two spring tubes. The upper ends of the two sets of connecting arms contact the ends of the springs inside the two spring tubes.

[0009] Furthermore, the central column is a vertically arranged cylindrical structure, the bottom support ring is a horizontally arranged annular 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 disposed 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 disposed on the upper end of the bottom support ring, and a connecting valve is disposed between the lower end of the outer side of the forming cylinder and the outer edge of the bottom support ring.

[0010] Furthermore, a fixed support arm is provided above the forming cylinder, and a feeding frame is fixedly provided at the end of the support arm. The support frame is a square box structure with open front and rear ends. A circular feeding port that runs vertically through the top plate of the support frame is provided at the center. The lower opening of the feeding frame is rotatably engaged with the inside of the feeding port. The feeding port on the support frame can slide vertically relative to the lower opening of the feeding frame.

[0011] Furthermore, the rotary mechanism includes a rotary motor, a drive gear, and a driven gear ring; a driven gear ring is fixedly installed on the outer side of the upper end of the feed inlet of the support frame, a fixed ring is fixedly sleeved on the outer side of the feed frame, a rotary motor is fixedly installed on the fixed ring, and a drive gear is fixedly installed on the output shaft of the rotary motor, the drive gear meshing with the driven gear ring.

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

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

[0014] Furthermore, the central column has a striking cavity inside. Multiple upper sliding grooves arranged in a circular array are provided between the top surface of the striking cavity and the upper end face of the central column. Multiple lower sliding grooves arranged in a circular array are provided at the bottom surface of the striking cavity. The upper and lower sliding grooves correspond one-to-one. The same rotating rod is provided inside each corresponding set of upper and lower sliding grooves. A retractable spring telescopic rod is fixedly installed inside each upper sliding groove. A sleeve is fixedly installed 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, multiple vertical impact columns are fixedly installed at the lower end of the inner wall of the striking cavity, with the impact columns located on one side of the rotating rod; multiple horizontal elastic arms are fixedly installed at the lower end of the outer side of each rotating rod, with the impact block fixedly installed at the end of the elastic arm away from the rotating rod.

[0016] Furthermore, a downward pressure groove is provided at the center of the upper end face of the central column. A downward pressure rod is slidably inserted into the groove along the vertical direction. The upper end of the downward pressure rod is located outside the upper end face of the central column and contacts the lower end face of the central gear. Three connecting holes are provided on the side wall of the downward pressure groove, and the three connecting holes are respectively connected to three upper sliding grooves. A connecting rope slides inside each connecting hole. A connecting ring is fixedly sleeved on the outside of the downward pressure rod. One end of each of the three connecting ropes is fixedly connected to the connecting ring, and the other end of each of the three connecting ropes is fixedly connected to the sleeve inside the three upper sliding grooves.

[0017] The beneficial effects of this invention compared to the prior art are as follows:

[0018] 1. The large-scale cement culvert forming device of the present invention transports cement raw materials to the end via a conveyor belt. After the cement raw materials are transported to the end's feeding frame, they are thrown out 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 circle along the annular cement pipe forming cavity, thereby allowing the cement raw materials to be evenly filled into the cement pipe forming cavity. After filling, the conveyor belt is removed from above the central column. A ring with the same shape as the vertical cross-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, a gantry crane or other equipment is used to lift the forming cylinder upwards. The forming cylinder, along with the bottom support ring and the hardened cement culvert, is lifted upwards, separating the cement culvert from the central column, which remains in its original position. After transferring the molding cylinder to the cement culvert curing area, the fixing of multiple connecting valves is released, allowing the molding cylinder to separate from the bottom support ring. Then, the molding cylinder is lifted upwards, separating it from the cement culvert and the bottom support ring, while the bottom support ring remains at the bottom of the cement culvert. The cement culvert is allowed to cure to a usable stage before being lifted upwards again and separated from the bottom support ring. This structural design not only achieves the streamlined production of large-volume cement culverts but also ensures uniform filling of cement material during the preparation process, guaranteeing the quality of the finished cement culvert.

[0019] 2. In the large cement culvert forming device of the present invention, during the rotation of the feeding frame, cement raw materials are spirally stacked into the cement pipe forming cavity layer by layer. However, since the amount of cement raw materials input from the outside is unstable, sometimes less and sometimes more, in order to ensure that the cement raw materials stacked in each layer are basically the same and to improve the quality of the cement culvert, a sliding offset plate is provided at the bottom of the feeding frame. When the conveyor belt is not rotating, the offset plate will return to its original position under the action of the spring, thus preventing the cement in the feeding box from being discharged. Initially, a portion of the cement raw material is injected into the feeding box for accumulation. Then, the conveyor belt rotates at a constant speed, allowing a constant amount of cement to be discharged into the cement pipe forming cavity. When the external feed 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 box under the action of the spring, reducing the feeding opening. However, because 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 the forming speed of the cement culvert is reduced. Through this setting, it is ensured that the forming quality of the cement culvert will not decrease due to changes in the amount of cement raw material conveyed during the manufacturing process, and the adjustment of the offset plate depends on the speed change of the conveyor belt, eliminating the need for manual adjustment. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the storage tank structure;

[0023] Figure 3 This is a schematic diagram showing the connection of the forming cylinder, bottom support ring, and central column;

[0024] Figure 4 This is a schematic diagram showing the connections between the support arm, support frame, rotary mechanism, sliding mechanism, and delivery frame;

[0025] Figure 5 This is a schematic diagram showing the connection between the support frame, the conveyor belt assembly, and the delivery frame;

[0026] Figure 6 This is a schematic diagram showing the connection between the delivery frame and the offset plate;

[0027] Figure 7 This is a schematic diagram showing the connection between the support frame and the rotating rod;

[0028] Figure 8 This is a schematic diagram showing the connection between the rotating rod, the pressing rod, the connecting rope, and the spring telescopic rod.

[0029] 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 frame, 9 is the storage tank, 10 is the sealing cover, 12 is the offset plate, 13 is the support frame, 15 is the rotary motor, 16 is the drive 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, and 32 is the spring telescopic rod. Detailed Implementation

[0030] To make the technical problems to be solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of this invention are described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0031] like Figure 1-8As shown, the present invention provides a large cement culvert forming device, including a central column 4, a bottom support ring 2 at the lower end of the central column 4, a forming cylinder 1 sleeved on the outside of the central column 4, and the area between the forming cylinder 1 and the central column 4 being a cement pipe forming cavity; a support frame 13 is rotatably arranged above the central column 4 via a rotary mechanism, and a conveyor belt assembly is slidably arranged inside the support frame 13 via a sliding mechanism, with a feeding frame 6 fixedly arranged at the end of the conveyor belt assembly, and the lower outlet of the feeding frame 6 located at the upper opening of the cement pipe forming cavity; a central gear 24 is fixedly arranged at the lower end of the support frame 13, and a ring of vertical rotating rods 27 is rotatably arranged inside the central column 4, with a driven gear 26 fixedly arranged at the upper end of each rotating rod 27, and all driven gears 26 being located around the outer periphery of the central gear 24; an impact block 30 is fixedly arranged outside the rotating rods 27 via an elastic arm 31.

[0032] The central column 4 is a vertically arranged cylindrical structure, and the bottom support ring 2 is a horizontally arranged annular structure. The inner diameter of the bottom support ring 2 is equal to the outer diameter of the central column 4, and the bottom support ring 2 is slidably disposed 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 top and bottom ends. The forming cylinder 1 is disposed on the upper end of the bottom support ring 2 and is coaxially arranged with the central column 4. A ring of circularly arranged connecting valves 3 is provided between the lower end of the outer side of the forming cylinder 1 and the outer edge of the bottom support ring 2, allowing the forming cylinder 1 and the bottom support ring 2 to be detachably connected.

[0033] A fixed support arm 5 is provided above the forming cylinder 1. A feed frame 8, which is thicker at the top and thinner at the bottom, is fixedly provided at the end of the support arm 5. The axis of the feed frame 8 is aligned with the axis of the central column 4. The support frame 13 is a square box structure with open front and rear ends. A circular feed port that runs vertically through the top plate of the support frame 13 is provided at the center. The lower opening of the feed frame 8 is rotatably engaged with the inside of the feed port, so that the support frame 13 can rotate relative to the feed frame 8. At the same time, the feed port on the support frame 13 can slide vertically relative to the lower opening of the feed frame 8.

[0034] The rotary mechanism includes a rotary motor 15, a driving gear 20, and a driven gear ring 18. The driven gear ring 18 is fixedly mounted on the outer side of the upper end of the feed inlet of the support frame 13. A fixing ring is fixedly sleeved on the outer side of the feed frame 8, and the rotary motor 15 is fixedly mounted on the fixing ring. The output shaft of the rotary motor 15 points vertically downwards, and the driving gear 20 is fixedly mounted on the output shaft of the rotary motor 15. The driving gear 20 meshes with the driven gear ring 18. When the rotary motor 15 drives the driving gear 20 to rotate, the driven gear ring 18, fixed to the support frame 13, causes the support frame 13 to rotate horizontally.

[0035] The conveyor belt assembly includes a fixed frame, a drive pulley, a driven pulley, a conveyor belt 7, and a conveyor motor. The fixed frame is kept horizontal and slidably inserted into the support frame 13. The lower ends of the left and right end faces of the fixed frame slide in contact with the lower ends of the left and right inner walls of the support frame 13, respectively, ensuring stable sliding within the support frame 13. A drive pulley and a driven pulley are rotatably mounted at both ends of the fixed frame, with the conveyor belt 7 connected between them. A conveyor motor is fixedly mounted at one end of the fixed frame, and its output shaft is fixedly connected to the drive pulley. The conveyor motor drives the drive pulley to rotate, which in turn drives the conveyor belt 7 to move.

[0036] The sliding mechanism includes a sliding motor 17 and drive wheels. A horizontal drive groove 16 is provided in the middle of the outer sides of both the left and right sides of the fixed frame. A sliding motor 17 is fixedly installed on the outer sides of both the left and right sides of the support frame 13. The output shaft of the sliding motor 17 extends into the support frame 13, and a drive wheel is fixedly installed on the output shaft of the sliding motor 17. The two drive wheels maintain close contact with the inner bottom surface of the two drive grooves 16. The sliding motor 17 drives the drive wheels to rotate, which in turn causes the fixed frame to slide, thereby causing the conveyor belt assembly to slide inside the support frame 13. This adjusts the position of the delivery frame 6, allowing it to adapt to the forming cavities of cement pipes of different diameters.

[0037] A feeding frame 6 is fixedly installed at the end of the fixed frame. The feeding frame 6 is a square box structure with openings at both the top and bottom. The upper opening of the feeding frame 6 corresponds to the end of the conveyor belt 7, allowing the material on the conveyor belt 7 to smoothly enter the upper opening of the feeding frame 6. A horizontal spring tube 21 is fixedly installed on the left and right sides of the lower opening of the feeding frame 6, with the length direction of the spring tube 21 parallel to the conveying direction of the conveyor belt 7. A spring is installed inside each spring tube 21. A sliding groove is installed on the side wall of each spring tube 21, with the length direction of the sliding groove parallel to the length direction of the spring tube 21. An offset plate 12 is slidably installed at the lower opening of the feeding frame 6. A set of connecting arms 23 is installed at each of the left and right ends of the offset plate 12. The lower ends of the two sets of connecting arms 23 are fixedly connected to the offset plate 12, and the upper ends of the two sets of connecting arms 23 extend through the sliding grooves on both sides into the two spring tubes 21, respectively, and the upper ends of the two sets of connecting arms 23 contact the ends of the springs inside the two spring tubes 21. When the offset plate 12 is not subjected to centrifugal force, it closes the lower opening of the delivery frame 6 under the restoring force of the springs on both sides. When the offset plate 12 is subjected to different centrifugal forces, it slides a different distance away from the conveyor belt assembly, and the lower opening of the delivery frame 6 remains open at different degrees. An upward bend is fixedly provided at the end of the offset plate 12 away from the conveyor belt assembly to ensure that the offset plate 12 does not detach from the side of the delivery frame 6 closest to the conveyor belt assembly. Multiple counterweights are also fixedly provided at the end of the offset plate 12 away from the conveyor belt assembly. These counterweights are used to adjust the centrifugal force on the offset plate 12.

[0038] A circular array of storage slots 9 is arranged on the upper surface of the central column 4. Each storage slot 9 has a rotatable sealing cover 10 at its upper opening. An attached vibrating motor is fixedly installed inside the storage slot 9. During operation, the attached vibrating motor in the storage slot 9 can vibrate the central column 4, thereby compacting the filled cement raw materials and further improving the forming quality of the cement culvert.

[0039] The central column 4 has a striking cavity inside. Three upper sliding grooves arranged in a circular array are located between the top surface of the striking cavity and the upper end face of the central column 4. Three lower sliding grooves arranged in a circular array are located at the bottom surface of the striking cavity. The three upper and three lower sliding grooves correspond one-to-one. The length of each upper and lower sliding groove is along the radial direction of the central column 4. A rotating rod 27 is installed inside each corresponding upper and lower sliding groove. The rotating rod 27 slides along the length of the upper and lower sliding grooves and rotates simultaneously while sliding within them. A retractable spring telescopic rod 32 is fixedly installed inside each upper sliding groove. The spring telescopic rod 32 is fixedly installed 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. A sleeve 28 is fixedly installed at the telescopic end of the spring telescopic rod 32. 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.

[0040] The central gear 24 is fixedly installed at the center of the lower end face of the base plate 19 of the support frame 13.

[0041] When the spring telescopic rod 32 is not subjected to external force, it is in a retracted state. Under the action of the spring telescopic rod 32, the rotating rod 27 is located inside the upper sliding groove away from the axis of the central column 4, and the driven gear 26 at the upper end of the rotating rod 27 disengages from the central gear 24. When the spring telescopic rod 32 is subjected to external force in the direction of the axis of the central column 4, it is in an extended state. The rotating rod 27 overcomes the elastic force of the spring telescopic rod 32 and is located inside the upper sliding groove close to the axis of the central column 4. The driven gear 26 at the upper end of the rotating rod 27 meshes with the central gear 24.

[0042] Three vertical impact pillars 29 arranged in a circular array are fixedly installed at the lower end of the inner wall of the impact chamber. The three impact pillars 29 are located on the side of the three rotating rods 27 away from the axis of the central pillar 4. Three horizontal elastic arms 31 arranged in a circular array are fixedly installed at the lower end of the outer side of each rotating rod 27. The impact block 30 is fixedly installed at the end of the elastic arm 31 away from the rotating rod 27.

[0043] A downward pressure groove is provided at the center of the upper end face of the central column 4. A downward pressure rod 25 is slidably inserted into the groove along the vertical direction. The upper end of the downward pressure rod 25 is located outside the upper end face of the central column 4 and contacts the lower end face of the central gear 24. Three connecting holes are provided on the side wall of the downward pressure groove, and the three connecting holes are respectively connected to three upper sliding grooves. A connecting rope slides inside each connecting hole. A connecting ring is fixedly sleeved on the outside of the downward pressure rod 25. One end of each of the three connecting ropes is fixedly connected to the connecting ring, and the other end of each of the three connecting ropes is fixedly connected to the sleeve 28 inside the three upper sliding grooves.

[0044] The working principle of this invention is as follows:

[0045] First, the metal cage required for cement culvert forming is placed into the cement pipe forming cavity from top to bottom. Then, the rotary motor 15 and the conveyor motor are started, and cement raw materials are simultaneously fed into the feeding frame 8. The cement raw materials pass through the feeding frame 8 and the feeding port 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 transports the cement raw materials to the end of the delivery frame 6. The rotary motor 15 drives the drive gear 20 to rotate. Since the drive gear 20 meshes with the driven gear ring 18, and the driven gear ring 18 is rotated and sleeved on the outside of the feeding frame 8, the drive gear 20 drives the driven gear ring 18 to rotate around the feeding frame 8. Since the driven gear ring 18 is fixed to the outside of the feeding port of the support frame 13, the driven gear ring 18 drives the support frame 13 to rotate around the feeding frame 8 as well. When the support frame 13 rotates, it drives the conveyor belt assembly inside to rotate synchronously, and the conveyor belt assembly drives the delivery frame 6 to rotate around the feeding frame 8. When the feeding frame 6 rotates horizontally, the offset plate 12 is subjected to centrifugal force, which overcomes the elastic force of the spring inside the spring tube 21 and slides away from the axis of the central column 4, thereby opening the opening at the lower end of the feeding frame 6. The cement raw material is output from the lower opening of the feeding frame 6 and enters the cement pipe forming cavity. As the support frame 13 and the conveyor belt assembly continue to rotate horizontally, the feeding frame 6 moves along the annular cement pipe forming cavity, allowing the cement raw material to be stacked layer by layer in a spiral shape into the cement pipe forming cavity.

[0046] Because the amount of cement raw material input from the outside is unstable, sometimes less and sometimes more, in order to ensure that the amount of cement raw material in each stack is basically the same and to improve the quality of the cement culvert, a sliding offset plate 12 is set at the bottom of the feeding frame 6. When the conveyor belt 7 is not rotating, the offset plate 12 will return to its original position under the action of the spring, thus preventing the cement in the feeding frame 6 from being discharged. At the beginning, a portion of the cement raw material is injected into the feeding frame 6 for stacking. Then the conveyor belt 7 rotates at a constant speed, allowing the cement to be discharged into the cement pipe forming cavity at a constant rate. When the amount of external material input 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, reducing the feeding opening. However, because 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 the forming quality of the cement culvert will not decrease due to the change in the amount of cement raw material conveyed during the manufacturing process, and the adjustment of the offset plate 12 depends on the speed change of the conveyor belt 7, eliminating the need for manual adjustment. It should be noted that when the cement raw material input decreases and the rotation speed of the conveyor belt 7 needs to be adjusted, it is necessary to ensure that there is always some cement raw material accumulated in the feeding box 6, so that the amount of cement raw material fed into the feeding box 6 is only affected by the size of the bottom opening of the feeding box 6; that is, it is necessary to ensure that the external cement raw material input is always greater than the discharge of the feeding box 6. If necessary, the rotation of the conveyor belt 7 can also be stopped.

[0047] When cement raw materials fall into conveyor belt 7, the overall weight of the conveyor belt assembly increases, causing the support frame 13 and the entire conveyor belt assembly to slide downwards. The base plate 19 of the support frame 13 drives the central gear 24 to slide downwards. The central gear 24 drives the lower pressure rod 25 to slide downwards inside the lower pressure groove. The lower pressure rod 25 drives the end of the three connecting ropes connected to the connecting ring to slide downwards inside the lower pressure groove, causing the connecting ropes to be pulled towards the end of the lower pressure rod 25. The three connecting ropes pull the three sleeves 28 to slide towards the side closer to the axis of the central column 4 inside the upper sliding groove. The three sleeves 28 drive the three rotating rods 27 to slide towards the side closer to the axis of the central column 4 inside the upper sliding groove, thereby causing the driven gears 26 at the upper end of the three rotating rods 27 to gradually approach the central gear 24 and mesh with the central gear 24. The rotating mechanism drives the support frame 13 to rotate, which in turn drives the central gear 24 to rotate. The central gear 24 then drives three driven gears 26 to rotate synchronously. These three driven gears 26 in turn drive three rotating rods 27 to rotate, which in turn drive the elastic arm 31 and the impact block 30 to rotate. During the rotation of the impact block 30, it impacts the impact column 29, generating significant vibration. After the impact, the elastic arm 31 deforms, allowing the impact block 30 to rub past the impact column 29, awaiting the next impact. This process produces a greater degree of vibration, improving the function of vibrating cement raw materials.

[0048] During the downward sliding of the support frame 13 and the conveyor belt assembly as a whole, the drive gear 20 and the driven gear ring 18 are always in a meshing state.

[0049] After filling, the conveyor belt 7 is removed from above the central column 4. A ring with the same shape as the vertical cross-section of the cement pipe forming cavity is used to press down from top to bottom, compacting the cement in the forming cavity. After the cement hardens, a gantry crane or similar equipment is used to lift the forming cylinder 1 upwards. The forming cylinder 1, along with the bottom support ring 2 and the hardened cement culvert, is lifted upwards, separating the cement culvert from the central column 4, which remains in its original position. After transferring the forming cylinder 1 to the cement culvert curing area, the fixing of multiple connecting valves 3 is released, separating the forming cylinder 1 from the bottom support ring 2. Then, the forming cylinder 1 is lifted upwards again, separating it from the cement culvert and the bottom support ring 2, while the bottom support ring 2 remains at the bottom of the cement culvert. After the cement culvert has cured to a usable stage, it is lifted upwards again and separated from the bottom support ring 2. Through the above structural setup, not only is the function of streamlined production of large-volume cement culverts realized, but the uniform filling effect of cement material is also ensured during the preparation process, guaranteeing the quality of the finished cement culvert.

[0050] When no more cement material falls onto conveyor belt 7, the weight of the conveyor belt assembly decreases. Under the action of their rebound force, 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 on the outside of the three rotating rods 27 pull the three connecting ropes outward, and the three connecting ropes pull the lower pressure rod 25 upward, causing the lower pressure rod 25 to slide upward inside the lower pressure groove and return to its initial position. Because 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 disengage from the central gear 24, the rotating rods 27 stop rotating, and no longer strike the impact column 29.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A large-scale cement culvert forming device, characterized in that: The system includes a central column (4), a bottom support ring (2) at the lower end of the central column (4), a forming cylinder (1) sleeved on the outside of the central column (4), and the area between the forming cylinder (1) and the central column (4) is the cement pipe forming cavity; a support frame (13) is rotatably set above the central column (4) via a rotary mechanism, and a conveyor belt assembly is slidably set inside the support frame (13) via a sliding mechanism, with a delivery frame (6) fixedly set at the end of the conveyor belt assembly, and the lower end outlet of the delivery frame (6) located at the upper opening of the cement pipe forming cavity; a central gear (24) is fixedly set at the lower end of the support frame (13), and a vertical rotating rod (27) is rotatably set inside the central column (4), each of which... Driven gears (26) are fixedly installed at the upper end of the rotating rod (27), and all driven gears (26) are located on the outer periphery of the central gear (24); impact blocks (30) are fixedly installed on the outer side of the rotating rod (27) via elastic arms (31); the conveyor belt assembly includes a fixed frame and a conveyor belt (7); the fixed frame is slidably inserted into the support frame (13), and the conveyor belt (7) is rotatably installed inside the fixed frame; the delivery frame (6) is fixedly installed at the end of the fixed frame, and the delivery frame (6) is a square box structure with openings at both the top and bottom. The upper opening of the delivery frame (6) corresponds to the end of the conveyor belt (7), and the lower opening of the delivery frame (6) is divided into left and right sides. A spring tube (21) is fixedly installed, and a spring is installed inside each spring tube (21); a sliding groove is installed on the side wall of each spring tube (21), and an offset plate (12) is slidably installed at the lower opening of the delivery frame (6). A set of connecting arms (23) is installed at the left and right ends of the offset plate (12). The lower ends of the two sets of connecting arms (23) are fixedly connected to the offset plate (12), and the upper ends of the two sets of connecting arms (23) extend into the two spring tubes (21) through the sliding grooves on both sides. The upper ends of the two sets of connecting arms (23) contact the ends of the springs inside the two spring tubes (21); the central column (4) An internal striking chamber is provided. Multiple upper sliding grooves arranged in a circular array are provided between the top surface of the striking chamber and the upper end surface of the central column (4). Multiple lower sliding grooves arranged in a circular array are provided at the bottom surface of the striking chamber. The multiple upper sliding grooves and multiple lower sliding grooves correspond one to one. The same rotating rod (27) is provided inside each set of corresponding upper and lower sliding grooves. A retractable spring telescopic rod (32) is fixedly provided inside each upper sliding groove. A sleeve (28) is fixedly provided at the telescopic end of the spring telescopic rod (32). The rotating rod (27) inside the upper sliding groove is rotatably inserted into the inner side of the sleeve (28).

2. The large-scale cement culvert forming device according to claim 1, characterized in that: The central column (4) is a vertically arranged cylindrical structure, and the bottom support ring (2) is a horizontally arranged annular 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 top and bottom. The forming cylinder (1) is arranged on the upper end of the bottom support ring (2). A connecting valve (3) is arranged between the lower end of the outer side of the forming cylinder (1) and the outer edge of the bottom support ring (2).

3. The large-scale cement culvert forming device according to claim 1, characterized in that: A fixed support arm (5) is provided above the forming cylinder (1). A feeding frame (8) is fixedly provided at the end of the support arm (5). The support frame (13) is a square box structure with open front and rear ends. A circular feeding port that runs vertically through the top plate of the support frame (13) is provided at the center. The lower opening of the feeding frame (8) is rotated and locked inside the feeding port. The feeding port on the support frame (13) can slide vertically relative to the lower opening of the feeding frame (8).

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

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

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

7. The large-scale cement culvert forming device according to claim 1, characterized in that: Multiple vertical impact columns (29) are fixedly installed at the lower end of the inner wall of the striking cavity. The impact columns (29) are located on one side of the rotating rod (27). Multiple horizontal elastic arms (31) are fixedly installed at the lower end of the outer side of each rotating rod (27). The impact block (30) is fixedly installed at the end of the elastic arm (31) away from the rotating rod (27).

8. The large-scale cement culvert forming device according to claim 1, characterized in that: A downward pressure groove is provided at the center of the upper end face of the central column (4). A downward pressure rod (25) is slidably inserted into the downward pressure groove along the vertical direction. The upper end of the downward pressure rod (25) is located outside the upper end face of the central column (4) and contacts the lower end face of the central gear (24). Three connecting holes are provided on the side wall of the downward pressure groove. The three connecting holes are respectively connected to the three upper sliding grooves. A connecting rope is slidably inserted into each connecting hole. A connecting ring is fixedly sleeved on the outside of the downward pressure rod (25). One end of each of the three connecting ropes is fixedly connected to the connecting ring. The other end of each of the three connecting ropes is fixedly connected to the sleeve (28) inside the three upper sliding grooves.

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