Protective device for tubular pile forming machine

Abstract

The utility model relates to the technical field of pipe pile forming machines, in particular to a protective device for a pipe pile forming machine, which aims to solve the technical problem that the forming quality is reduced due to the fact that a pipe die in the prior art jumps easily during forming, and specifically comprises a bottom frame arranged below the pipe die, and at least two protective assemblies are arranged on the bottom frame side by side in the axial direction of the pipe die. Each protection assembly comprises two pressing wheel mechanisms symmetrically arranged on the left side and the right side of the pipe die, each pressing wheel mechanism comprises a vertical cabinet fixedly installed on the bottom frame, two bearing seats are arranged on a side plate, facing one side of the pipe die, of each vertical cabinet side by side in the axial direction of the pipe die, and a swing arm is arranged between the two bearing seats. A connecting shaft is arranged at the end, close to the bearing seat, of the swing arm in the axial direction of the pipe die. By means of the pressing wheel mechanisms symmetrically distributed on the two sides of the pipe die, the position of the pipe die in the centrifugal process can be effectively pressed and stabilized, the jumping phenomenon of the pipe die is effectively reduced, and therefore constant centrifugal force is guaranteed, and the forming quality of a pipe pile is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe pile forming machines, in particular to a protection device for a pipe pile forming machine. Background Technique

[0002] The post-tensioned prestressed concrete large-diameter pipe pile is abbreviated as the large pipe pile. It is a prestressed concrete pipe pile formed by using three composite processes of vibration, rolling and centrifugation, and then grouting self-anchoring and splicing tensioning through water curing and steam curing. The large pipe pile has the characteristics of strong bearing capacity, good seismic resistance, high durability, high construction efficiency, environmental protection and energy saving, and is widely used in various fields such as construction, water conservancy and transportation construction.

[0003] The cement pipe pile centrifugal forming machine is a machine that manufactures cement pipe piles according to the principle of cement centrifugal forming. By centrifuging, rolling and vibrating the cement raw materials in the corresponding cement pipe mold, it usually includes two rotating shafts arranged side by side. A positioning wheel set is fixedly installed on each rotating shaft. The cement pipe mold is coaxially arranged between the two rotating shafts. One of the transmission shafts is set as the driving shaft connected to the power. The driving shaft drives the positioning wheel set on it to rotate, and then drives the cement pipe mold to rotate centrifugally (refer to Figure 2 ).

[0004] However, during the centrifugal rotation of the cement pipe mold, due to factors such as uneven steel quality, accumulation of metal fatigue, and untimely maintenance, it may cause the mold to jump. The existing forming machine lacks a corresponding protection device. Once the pipe mold jumps, the centrifugal force cannot be constant, and the compactness of the concrete cannot meet the requirements. In the lightest case, it affects the forming quality of the pipe pile and shortens the service life of the forming equipment. In the worst case, it may lead to production safety accidents and pose a threat to the safety of production personnel and equipment. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a protection device for a pipe pile forming machine aiming at the deficiencies of the prior art, which can effectively reduce the jumping phenomenon that occurs when the cement pipe mold rotates centrifugally.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A protection device for a pipe pile forming machine is characterized in that: it includes a chassis arranged below the pipe mold, and at least two protection components are arranged side by side along the axial direction of the pipe mold on the chassis. Each protection component includes two pressing wheel mechanisms symmetrically arranged on the left and right sides of the pipe mold.

[0008] The pressing wheel mechanism includes an upright cabinet fixedly installed on the chassis. On the side plate of the upright cabinet facing the pipe mold, two bearing seats are arranged side by side along the axial direction of the pipe mold. A swing arm is arranged between the two bearing seats. One end of the swing arm close to the bearing seat is provided with a connecting shaft along the axial direction of the pipe mold. The middle part of the connecting shaft is fixedly connected with the swing arm. The two ends of the connecting shaft are respectively rotationally connected with the two bearing seats through the first bearings. One end of the swing arm close to the pipe mold is provided with an extension shaft along the axial direction of the pipe mold. The middle part of the extension shaft is fixedly connected with the swing arm. The two ends of the extension shaft are respectively rotationally connected with two pressing wheels through the second bearings.

[0009] A driving chamber is arranged inside the upright cabinet. A rectangular opening is arranged on the side of the driving chamber facing the swing arm. The opening is arranged between the two bearing seats. A transmission arm is movably arranged in the middle of the driving chamber. One end of the transmission arm extends out of the opening and is fixedly connected with the adjacent end of the swing arm as a whole. An obtuse angle with an upward opening is formed between the transmission arm and the swing arm.

[0010] A driving mechanism is arranged at the lower part of the driving chamber. The output end of the driving mechanism is connected with the transmission arm and is used for driving the swing arm to swing around the connecting shaft so that the pressing wheels are pressed down onto the surface of the pipe mold.

[0011] The technical problem to be solved by the present utility model can also be further realized through the following steps. The driving mechanism includes a mounting plate fixedly arranged between the bottom of the driving chamber and the transmission arm. A hinge seat is fixedly arranged on the mounting plate. A hydraulic cylinder is rotationally connected to the hinge seat. The hydraulic cylinder is provided with a telescopic end upwards. A swing seat is fixedly sleeved on the telescopic end. The swing seat is rotationally connected with the transmission arm.

[0012] The technical problem to be solved by the present utility model can also be further realized through the following steps. A collision prevention space for the telescopic end of the hydraulic cylinder to extend upwards is arranged between the top of the driving chamber and the transmission rod. The height of the collision prevention space is greater than the maximum telescopic stroke of the hydraulic cylinder.

[0013] The technical problem to be solved by the present utility model can also be further realized through the following steps. An access passage with a width greater than the diameter of the pipe mold is arranged between the two pressing wheel mechanisms of the same protection component. When the swing arms of the two pressing wheel mechanisms both move to the upper dead center, the access passage is opened and the pipe mold can enter the centrifugal position downwards. When the rocker arms of the two pressing wheel mechanisms both move to the lower dead center, the access passage is closed and the pipe mold and the pressing wheels block each other.

[0014] The technical problem to be solved by the present utility model can also be further realized through the following steps. The upright cabinet is of a cuboid structure. Side plates are arranged on the four side surfaces of the upright cabinet. An inspection opening leading to the inside of the driving chamber is arranged on the side plate far from the pipe mold. A side door is rotatably covered outside the inspection opening. A locking device matched with the side door is arranged on the upright cabinet.

[0015] The technical problem to be solved by the present utility model can also be further realized through the following steps. The angle of the obtuse angle is specifically 110° - 130°.

[0016] The technical problem to be solved by the present utility model can also be further realized through the following steps. The pressing wheel includes a wheel body rotatably connected to the extension shaft, and a rubber wheel sleeve fixedly sleeved on the outer peripheral surface of the wheel body. Diamond-shaped patterns for anti-slip are provided on the wheel surface of the rubber wheel sleeve.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: Through the pressing wheel mechanisms symmetrically distributed on both sides of the pipe mold, it can effectively press and stabilize the position of the pipe mold during the centrifugation process, effectively reducing the phenomenon of pipe mold jumping caused by factors such as uneven steel quality, cumulative metal fatigue, or untimely maintenance, thus ensuring the constancy of centrifugal force, improving the density of concrete and the forming quality of pipe piles; reducing mechanical wear and impact caused by jumping, extending the service life of the forming equipment and its components, and reducing maintenance costs; providing higher safety protection for the production environment by reducing the risk of production safety accidents caused by pipe mold jumping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the schematic structural diagram a of the present utility model;

[0019] Figure 2 is the schematic structural diagram b of the present utility model;

[0020] Figure 3 is the schematic structural diagram of the pressing wheel mechanism (after removing one side plate);

[0021] Figure 4 is the distribution schematic diagram of the protection components;

[0022] In the figure: 1 - pipe mold; 2 - chassis; 3 - pressing wheel mechanism; 4 - vertical cabinet; 5 - bearing seat; 6 - swing arm; 7 - connecting shaft; 8 - extension shaft; 9 - pressing wheel; 10 - drive chamber; 11 - opening; 12 - transmission arm; 13 - obtuse angle; 14 - mounting plate; 15 - hinge seat; 16 - hydraulic cylinder; 17 - swing seat; 18 - anti-collision space; 19 - access passage; 20 - side door, 21 - lock; 22 - wheel body; 23 - rubber wheel sleeve; 24 - diamond-shaped pattern; 25 - positioning wheel; 26 - magnetic suction hook. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following further describes the specific technical solutions of the present utility model so that those skilled in the art can further understand the present utility model without restricting its rights.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the utility model.

[0025] Please refer to Figures 1-4 , a protective device for a pipe pile forming machine, which includes a chassis 2 arranged below the pipe mold 1. The chassis 2 can be fixedly installed on the bottom plate of the forming machine or can be the bottom plate of the forming machine itself. Along the axial direction of the pipe mold 1, at least two protective components are arranged side by side on the chassis 2. One protective component should be arranged at each end of the pipe pile. Each protective component includes two pressing wheel mechanisms 3 symmetrically arranged on the left and right sides of the pipe mold 1.

[0026] The pressing wheel mechanism 3 includes a vertical cabinet 4 fixedly installed on the chassis 2. On the side plate of the vertical cabinet 4 facing the pipe mold 1, two bearing seats 5 are arranged side by side along the axial direction of the pipe mold 1. A swing arm 6 is arranged between the two bearing seats 5. The swing arm 6 is perpendicular to the axial direction of the pipe mold 1. At one end of the swing arm 6 close to the bearing seat 5, a connecting shaft 7 is arranged along the axial direction of the pipe mold 1. The middle part of the connecting shaft 7 is fixedly connected to the swing arm 6. The two ends of the connecting shaft 7 are respectively rotatably connected to the two bearing seats 5 through first bearings. At one end of the swing arm 6 close to the pipe mold 1, an extension shaft 8 is arranged along the axial direction of the pipe mold 1. The middle part of the extension shaft 8 is fixedly connected to the swing arm 6. The two ends of the extension shaft 8 are respectively rotatably connected with two pressing wheels 9 through second bearings. Sealing covers are installed on both sides of the pressing wheels 9, which can effectively avoid the interference of mud and dust.

[0027] A driving chamber 10 is arranged inside the vertical cabinet 4. On one side of the driving chamber 10 facing the swing arm 6, a rectangular opening 11 is arranged. The opening 11 is arranged between the two bearing seats 5. A transmission arm 12 is movably arranged in the middle of the driving chamber 10. The transmission arm 12 is also perpendicular to the axial direction of the pipe mold 1 and is coplanar with the swing arm 6. One end of the transmission arm 12 extends out of the opening 11 and is fixedly connected to the adjacent end of the swing arm 6 as a whole. An obtuse angle 13 with the opening 11 facing upward is formed between the transmission arm 12 and the swing arm 6;

[0028] A driving mechanism is arranged at the lower part of the driving chamber 10. The output end of the driving mechanism is connected to the transmission arm 12, and is used to drive the swing arm 6 to swing around the connecting shaft 7, so that the pressing wheel 9 presses downward on the surface of the pipe mold 1.

[0029] The driving mechanism includes a mounting plate 14 fixedly arranged between the bottom of the driving chamber 10 and the transmission arm 12. A hinge seat 15 is fixedly arranged on the mounting plate 14. A hydraulic cylinder 16 is rotatably connected to the hinge seat 15. The hydraulic cylinder 16 is provided with a telescopic end upwards. A swing seat 17 is fixedly sleeved on the telescopic end. A rotational connection is provided between the swing seat 17 and the end of the transmission arm 12 far away from the pipe mold 1. In this way, the transmission arm 12 is pushed by the hydraulic cylinder 16 to turn upwards around the connecting shaft 7, and then the swing arm 6 on the other side swings downwards, pressing the pressing wheel 9 against the surface of the pipe mold 1.

[0030] A collision prevention space 18 for the telescopic end of the hydraulic cylinder 16 to extend upwards is provided between the top of the driving chamber 10 and the transmission rod. The height of the collision prevention space 18 is greater than the maximum telescopic stroke of the hydraulic cylinder 16. In this way, the top plate of the upright cabinet 4 can be prevented from interfering with the telescopic movement of the hydraulic cylinder 16, improving the transmission efficiency.

[0031] An access passage 19 with a width greater than the diameter of the pipe mold 1 is provided between the two pressing wheel mechanisms 3 of the same protection assembly. The width of the access passage 19 is the horizontal distance between two opposite pressing wheels 9. When the swing arms 6 of the two pressing wheel mechanisms 3 both move to the upper dead center, the access passage 19 is opened, and the pipe mold 1 will not be blocked by the pressing wheels 9 and can move downwards to the centrifugal position; when the rocker arms of the two pressing wheel mechanisms 3 both move to the lower dead center, the access passage 19 is closed, and the pipe mold 1 is blocked by the pressing wheels 9 and cannot move downwards to the centrifugal position. Please refer to Figures 1-2 , the centrifugal position is the positioning area between the two positioning wheels 25. One of the positioning wheels 25 is a driving wheel. When the pipe mold 1 is placed at the centrifugal position, the driving wheel can drive the pipe mold 1 to rotate centrifugally.

[0032] The upright cabinet 4 is of a cuboid structure. Side plates are provided on four sides of the upright cabinet 4. An inspection opening leading to the inside of the driving chamber 10 is provided on the side plate on the side far away from the pipe mold 1. A side door 20 is rotatably covered outside the inspection opening. A locking device 21 is provided on the upright cabinet 4 and is matched with the side door 20. When adjustment, maintenance or cleaning is required, the staff can open the locking device 21 and enter through the adjacent side door 20 for operation.

[0033] The angle of the obtuse angle 13 is specifically 110° - 130°.

[0034] The pressing wheel 9 includes a wheel body 22 rotatably connected to the extension shaft 8, and a rubber wheel sleeve 23 fixedly sleeved on the outer peripheral surface of the wheel body 22. The rubber wheel sleeve 23 can effectively absorb the vibration generated when the pipe pile rotates centrifugally. Diamond patterns 24 for anti-slip are provided on the wheel surface of the rubber wheel sleeve 23.

[0035] Working principle: A protective device for a pipe pile forming machine of the present utility model, when in use, first ensure that the protective device is correctly installed on the bottom plate of the pipe pile forming machine, and all components are in the initial state, that is, the swing arm 6 of the pressing wheel mechanism 3 is at the upper dead center position, the access passage 19 is open, and the pipe mold 1 can freely enter the centrifugal position.

[0036] When the pipe mold 1 is hoisted by the magnetic suction hook 26 to the centrifugal position between the two positioning wheels 25 and is ready for centrifugal forming, the hydraulic cylinder 16 starts to work. The telescopic end of the hydraulic cylinder 16 extends upward, pushing the transmission arm 12 to turn upward around the connecting shaft 7 through the swing seat 17, and then driving the other end of the swing arm 6 (i.e., the end close to the pipe mold 1) to swing downward. As the swing arm 6 moves downward, the pressing wheel 9 gradually approaches and finally presses on the surface of the pipe mold 1, realizing stable limiting of the pipe mold 1.

[0037] During the centrifugal forming process of the pipe mold 1, the pressing wheel mechanism 3 exerts a stable pressure on the pipe mold 1 through the pressing wheel 9, effectively preventing the pipe mold 1 from jumping due to various reasons. At the same time, the rubber wheel sleeve 23 on the pressing wheel 9 and the diamond pattern 24 on its surface not only increase the friction with the pipe mold 1, improve the anti-slip effect, but also reduce the wear on the surface of the pipe mold 1, protecting the integrity of the pipe mold 1.

[0038] When the pipe mold 1 completes centrifugal forming, the telescopic end of the hydraulic cylinder 16 retracts downward, the transmission arm 12 moves downward accordingly, driving the swing arm 6 to swing upward, the pressing wheel 9 gradually leaves the surface of the pipe mold 1, the access passage 19 reopens, and the pipe mold 1 can be smoothly removed from the centrifugal position for subsequent processing.

[0039] In addition, this device also designs a convenient maintenance and repair passage. When it is necessary to adjust, repair or clean the pressing wheel mechanism 3 or the driving mechanism, the staff only needs to open the stopper 21 on the side plate of the vertical cabinet 4 and turn the side door 20 to enter the inside of the driving chamber 10 for operation. This design not only improves the maintenance efficiency but also ensures the safety of the operators.

[0040] In summary, the present utility model can effectively press and stabilize the position of the pipe mold 1 during centrifugation through the pressing wheel mechanisms 3 symmetrically distributed on both sides of the pipe mold 1, effectively reducing the jumping phenomenon of the pipe mold 1 caused by factors such as uneven steel quality, cumulative metal fatigue or untimely maintenance, thus ensuring the constancy of the centrifugal force, improving the compactness of the concrete and the forming quality of the pipe pile; reducing the mechanical wear and impact caused by jumping, extending the service life of the forming equipment and its components, and reducing the maintenance cost; providing a higher safety guarantee for the production environment by reducing the risk of production safety accidents caused by the jumping of the pipe mold 1.

[0041] Obviously, the described embodiments are some but not all of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present utility model.

Claims

1. A protective device for a pipe pile forming machine, characterized in that: It includes a chassis arranged below the pipe mold, and at least two protective components are arranged side by side along the axial direction of the pipe mold on the chassis. Each protective component includes two pressing wheel mechanisms symmetrically arranged on the left and right sides of the pipe mold. The pressing wheel mechanism includes a vertical cabinet fixedly installed on the chassis. On the side plate of the vertical cabinet facing the pipe mold, two bearing seats are arranged side by side along the axial direction of the pipe mold. A swing arm is arranged between the two bearing seats. At one end of the swing arm close to the bearing seat, a connecting shaft is arranged along the axial direction of the pipe mold. The middle part of the connecting shaft is fixedly connected to the swing arm. The two ends of the connecting shaft are respectively rotationally connected to the two bearing seats through the first bearings. At one end of the swing arm close to the pipe mold, an extension shaft is arranged along the axial direction of the pipe mold. The middle part of the extension shaft is fixedly connected to the swing arm. The two ends of the extension shaft are respectively rotationally connected with two pressing wheels through the second bearings. A driving chamber is arranged inside the vertical cabinet. A rectangular opening is arranged on the side of the driving chamber facing the swing arm. The opening is arranged between the two bearing seats. A transmission arm is movably arranged in the middle of the driving chamber. One end of the transmission arm extends out of the opening and is fixedly connected to the adjacent end of the swing arm as a whole. An obtuse angle with an upward opening is formed between the transmission arm and the swing arm. A driving mechanism is arranged at the lower part of the driving chamber. The output end of the driving mechanism is connected to the transmission arm and is used to drive the swing arm to swing around the connecting shaft, so that the pressing wheel presses downward on the surface of the pipe mold.

2. The protective device for a pipe pile forming machine according to claim 1, characterized in that: The driving mechanism includes a mounting plate fixedly arranged between the bottom of the driving chamber and the transmission arm. A hinge seat is fixedly arranged on the mounting plate. A hydraulic cylinder is rotationally connected to the hinge seat. The hydraulic cylinder is provided with a telescopic end upward. A swing seat is fixedly sleeved on the telescopic end. The swing seat is rotationally connected to the transmission arm.

3. The protective device for a pipe pile forming machine according to claim 2, characterized in that: A collision prevention space for the telescopic end of the hydraulic cylinder to extend upward is arranged between the top of the driving chamber and the transmission rod. The height of the collision prevention space is greater than the maximum telescopic stroke of the hydraulic cylinder.

4. The protective device for a pipe pile forming machine according to claim 1 or 2, characterized in that: An access passage with a width greater than the diameter of the pipe mold is arranged between the two pressing wheel mechanisms of the same protective component. When the swing arms of the two pressing wheel mechanisms both move to the upper dead center, the access passage is opened, and the pipe mold can move downward to the centrifugal position. When the rocker arms of the two pressing wheel mechanisms both move to the lower dead center, the access passage is closed, and the pipe mold and the pressing wheel block each other.

5. The protective device for a pipe pile forming machine according to claim 1, characterized in that: The vertical cabinet is of a cuboid structure. Side plates are arranged on the four side surfaces of the vertical cabinet. Among them, an inspection opening leading to the inside of the driving chamber is arranged on the side plate far from the pipe mold. A side door is rotatably covered outside the inspection opening. A locking device is arranged on the vertical cabinet and is matched with the side door.

6. The protective device for a pipe pile forming machine according to claim 1, wherein: The angle of the obtuse angle is specifically 110° - 130°.

7. The protective device for a pipe pile forming machine according to claim 1, characterized in that: The pressing wheel includes a wheel body rotationally connected to the extension shaft, and a rubber wheel sleeve fixedly sleeved on the outer peripheral surface of the wheel body. Diamond patterns for anti-slip are arranged on the wheel surface of the rubber wheel sleeve.

Images