Production equipment and processing method of super-high-strength prestressed concrete pipe pile

Abstract

This invention relates to the field of pipe pile manufacturing technology and discloses a production equipment for ultra-high strength prestressed concrete pipe piles, including a lower mold. A reinforcing cage is placed in the inner cavity of the lower mold. An installation platform is provided on the upper side of the reinforcing cage. The installation platform is connected to a moving mechanism. A discharge port is installed in the middle of the installation platform. Rotating shafts are installed on both sides of the upper side of the installation platform at the discharge port. One side of the rotating shaft is connected to a power mechanism. A guide is installed on the circumferential downward side of the rotating shaft. A support is fixedly installed on the side of the guide facing the reinforcing cage. When the guide rotates downward to its limit position, the support compresses the reinforcing cage. This invention, through the arrangement of the guide and support, results in a near-hard impact between the block concrete and the circumferential reinforcing steel, making it easier for the block concrete to disperse and enter the lower mold. Through the above actions, the probability of concrete falling onto the closed surface of the upper and lower molds is reduced.

Description

Technical Field

[0001] This invention relates to the field of pipe pile manufacturing technology, specifically to a production equipment and processing method for ultra-high strength prestressed concrete pipe piles. Background Technology

[0002] Pipe piles are hollow cylindrical precast concrete components made using a prestressed centrifugal prestressing process. They are commonly used to help solidify the foundations of railways, highways, and bridges.

[0003] In the existing pipe pile manufacturing process, the pre-fabricated steel reinforcement cage is first placed into the lower mold of the pipe pile. Then, the mixed concrete is poured into the lower mold using a concrete placing device. Figure 5 As shown, the concrete gradually fills the area enclosed by the reinforcing cage. Then, the upper and lower molds of the pipe pile are fixed, and the fixed molds are placed in a centrifugal device. This allows the concrete to form a hollow cylindrical pipe pile within the mold, with the reinforcing cage inside. The pipe pile is then removed and placed in a steam curing device. Finally, after curing, the finished pipe pile is obtained. However, during the process of the concrete entering the lower mold via the placing device, the circumferential reinforcing bars of the reinforcing cage are arranged very closely, and their diameter is small. When some blocky concrete comes into contact with the circumferential reinforcing bars, the bars deform downwards, causing them to catch the blocky concrete and preventing it from entering the lower mold. When the placing device leaves its current position, the blocky concrete easily slides to both sides of the reinforcing cage and falls onto the closing surface of the upper and lower molds. This weakens the closing effect of the upper and lower molds during subsequent sealing, making it easy for the concrete in the mold to detach during centrifugal operation, thus affecting the quality of the pipe pile. Summary of the Invention

[0004] In view of the shortcomings of existing pipe pile placing devices mentioned in the background art, the present invention provides a production equipment and processing method for ultra-high strength prestressed concrete pipe piles, which has the advantages of reducing the probability of concrete falling onto the closed surface of the upper and lower molds and improving the quality of pipe piles, thus solving the technical problems mentioned in the background art.

[0005] This invention provides the following technical solution: a production equipment for ultra-high strength prestressed concrete pipe piles, including a lower mold, in which a reinforcing cage is placed. An installation platform is provided on the upper side of the reinforcing cage. The installation platform is connected to a moving mechanism. A discharge port is fixedly installed in the middle of the installation platform. Rotating shafts are rotatably installed on both sides of the upper side of the installation platform, located at the discharge port. One side of the rotating shaft is connected to a power mechanism. A guide is fixedly installed on the lower side of the rotating shaft. A support is fixedly installed on the side of the guide facing the reinforcing cage. When the guide rotates downward to its limit position, the support compresses the reinforcing cage.

[0006] Preferably, the guide member has a telescopic cavity located on the side of the support member facing away from the reinforcing cage. The telescopic cavity is connected to the inner cavity of the support member. A telescopic member is slidably installed in the telescopic cavity. An opening is provided through the guide member on the side of the telescopic cavity facing away from the support member. The opening connects the external environment to the telescopic cavity. A connecting rod is hinged to the side of the telescopic member facing away from the support member. The other end of the connecting rod passes through the opening. A second power mechanism is fixedly installed on the side of the guide member facing away from the reinforcing cage. A turntable is rotatably installed on the front side of the second power mechanism. The other end of the connecting rod is eccentrically hinged to the front side of the turntable. An impact member is fixedly installed on the side of the telescopic member facing the support member. The end of the impact member near the reinforcing cage extends into the inner cavity of the support member.

[0007] Preferably, the upper side of the impactor is fixedly equipped with contact teeth at equal intervals, and a rotating component is rotatably installed in the inner cavity of the support component at the position above the impactor. The outer circumferential side of the rotating component is fixedly equipped with gear teeth at equal intervals, and the contact teeth and gear teeth form a meshing connection. The rear end of the rotating component extends out of the support component, and a pressure plate is fixedly installed on the outer circumferential side of the rear end of the rotating component.

[0008] Preferably, when the impactor impacts the support, the rotating member causes the pressure plate to contact the reinforcing cage, and the front side of the support is curved.

[0009] Preferably, a pressure rod is fixedly installed on the front side of the pressure plate, and the pressure rod and the guide are on the same vertical plane.

[0010] Preferably, the support member is made of an elastic material.

[0011] A method for processing ultra-high strength prestressed concrete pipe piles includes the following steps: The first step is to cut the steel bars to a fixed length and then upset the ends of the cut steel bars to make them thicker. After that, the steel bars are rolled and welded to form a steel cage. The second step is to clean the inner cavity of the lower mold and spray a release agent on the inner wall of the lower mold. After that, the steel cage is put into the lower mold. The third step involves adding cement, sand, water, fly ash, mineral powder, silica fume, etc., to the mixing device. At the same time, high-performance admixtures are added to the mixing device. Then, the mixing device is run to finally obtain ultra-high strength concrete. The fourth step is to position the guide components on both sides of the reinforcing cage and then transport the ultra-high strength concrete from the discharge port into the lower mold. The fifth step is to close the upper and lower molds after the material is fed into the pipe pile, and then tension the closed molds to eliminate the stress inside the pipe pile. The sixth step is to place the mold on the centrifuge device, which will make the mold rotate rapidly, thereby forming a hollow cylindrical pipe pile inside the mold. After centrifugation is completed, the mold is opened and the formed pipe pile is taken out. The seventh step is to subject the formed pipe piles to multi-stage autoclaving to achieve the desired shape. Finally, the finished pipe piles are inspected.

[0012] The present invention has the following beneficial effects: 1. The present invention, through the setting of guide members and support members, when the guide members rotate downward and are in the position on both sides of the reinforcing cage, the guide members will drive the support members to move synchronously. Then, when the guide members rotate to the limit position, the support members will contact and squeeze the circumferential reinforcing bars of the reinforcing cage, thereby applying a supporting force to the circumferential reinforcing bars. This makes it difficult for the circumferential reinforcing bars to deform downward when the block concrete comes into contact with them, resulting in a near hard impact between the block concrete and the circumferential reinforcing bars. This makes it easy for the block concrete to disperse and enter the lower mold. Through the above actions, the probability of concrete falling onto the closed surface of the upper and lower molds is reduced.

[0013] 2. By setting up impactors and support members, the present invention allows the impactors to intermittently impact the support members during the process of concrete entering the lower mold, causing the support members to cause the circumferential reinforcing bars to vibrate. Through the above actions, the concrete is more easily dispersed when it comes into contact with the circumferential reinforcing bars, thereby further reducing the probability of concrete falling onto the closed surface of the upper and lower molds.

[0014] 3. By setting up a pressure plate and a rotating component, the present invention causes the rotating component to rotate during the intermittent impact of the impactor on the support component, which in turn causes the pressure plate to intermittently strike the reinforcing cage, thereby breaking up the blocky concrete stuck on the reinforcing cage. This reduces the probability of concrete falling onto the closed surface of the upper and lower molds. At the same time, since the pressure plate strikes the reinforcing cage simultaneously when the impactor and the support component collide, the above actions ensure that the circumferential reinforcing bars of the reinforcing cage are always in contact with the support component, reducing the probability of concrete entering the closed surface of the upper and lower molds through the contact point between the support component and the reinforcing cage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of the guide component of the present invention; Figure 2 For the present invention Figure 1 Enlarged schematic diagram of a portion of the structure at point A; Figure 3 This is a schematic diagram showing the installation state of the pressure plate and the rotating component of the present invention; Figure 4 This is a schematic diagram of the upper and lower molds of the present invention; Figure 5 This is a schematic diagram of the existing technology structure.

[0016] In the diagram: 1. Lower mold; 2. Mounting platform; 3. Discharge port; 4. Rotating shaft; 5. Guide component; 6. Support component; 7. Telescopic cavity; 8. Telescopic component; 9. Connecting rod; 10. Turntable; 11. Impact component; 12. Contact tooth; 13. Rotating component; 14. Gear tooth; 15. Pressure plate; 16. Pressure rod. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1 and Figure 5 A production device for ultra-high strength prestressed concrete pipe piles includes a lower mold 1, in which a reinforcing cage is placed. An installation platform 2 is positioned above the reinforcing cage and connected to a moving mechanism (not shown in the figure). A discharge port 3 is welded to the center of the installation platform 2. Rotating shafts 4 are rotatably mounted on both sides of the upper side of the installation platform 2, located at the discharge port 3. One side of each rotating shaft 4 is connected to a primary power mechanism (not shown in the figure). Guide members 5 are welded to the lower side of the rotating shaft 4, and support members 6 are welded to the side of the guide members 5 facing the reinforcing cage. When the guide members 5 rotate downwards to their limit position, the support members 6 compress... The reinforcing cage is compressed by the support member 6, which applies a supporting force to the circumferential reinforcing bars. This makes it difficult for the circumferential reinforcing bars to deform downwards when the subsequent block concrete comes into contact with them, resulting in a near-hard impact between the block concrete and the circumferential reinforcing bars. This makes it easier for the block concrete to disperse and enter the lower mold 1. Through the above actions, the probability of concrete falling onto the closed surface of the upper and lower molds is reduced. At the same time, due to the contact between the support member 6 and the reinforcing cage, some of the concrete that slides to both sides along the circumferential reinforcing bars is blocked by the support member 6. Through this action, the probability of concrete falling onto the closed surface of the mold is further reduced.

[0019] Please see Figure 1 , Figure 2 and Figure 4 The support member 6 is made of an elastic material (such as wear-resistant rubber). A telescopic cavity 7 is formed inside the guide member 5 on the side of the support member 6 facing away from the reinforcing cage. The telescopic cavity 7 communicates with the inner cavity of the support member 6. A telescopic member 8 is slidably installed in the telescopic cavity 7. An opening is formed inside the guide member 5 on the side of the telescopic cavity 7 facing away from the support member 6, connecting the external environment to the telescopic cavity 7. A connecting rod 9 is hinged to the side of the telescopic member 8 facing away from the support member 6, with the other end of the connecting rod 9 passing through the opening. A second power mechanism is welded to the side of the guide member 5 facing away from the reinforcing cage. A turntable 10 is rotatably mounted on the front side of the second power mechanism. The other end of the connecting rod 9 is eccentrically hinged to the front side of the turntable 10. An impact member 11 is welded to the side of the telescopic member 8 facing the support member 6. The end of the impact member 11 near the reinforcing cage extends into the inner cavity of the support member 6. During the above process, the second power mechanism drives the turntable 10 to rotate, causing the connecting rod 9 to drive the impact member 11 to intermittently impact the inner wall of the support member 6. Since the outer wall of the support member 6 is in contact with the reinforcing cage, the impacted support member 6 causes the circumferential reinforcing bars to vibrate, making it easier for the concrete to disperse when it comes into contact with the circumferential reinforcing bars, thereby further reducing the probability of the concrete falling onto the mold closing surface. In addition, the vibration of the support member 6 causes the concrete blocked by the support member 6 to fall into the lower mold 1, thereby reducing the probability of the concrete falling onto the mold closing surface.

[0020] Please see Figure 2 and Figure 3 The upper side of the impact member 11 is welded with contact teeth 12 at equal intervals. The inner cavity of the support member 6 is rotatably installed on the upper side of the impact member 11. The outer circumferential side of the rotating member 13 is welded with gear teeth 14 at equal intervals. The contact teeth 12 and the gear teeth 14 form a meshing connection. The rear end of the rotating member 13 extends out of the support member 6. The outer circumferential side of the rear end of the rotating member 13 is welded with a pressure plate 15. During the intermittent impact of the impact member 11 on the support member 6, the contact teeth 12 will mesh with the gear teeth 14 and rotate, causing the rotating member 13 to drive the pressure plate 15 to rotate back and forth, resulting in the pressure plate 15 intermittently hitting the reinforcing cage, thereby breaking the blocky concrete stuck on the reinforcing cage, reducing the probability of the concrete falling onto the mold closing surface.

[0021] When the impactor 11 impacts the support 6, the rotating member 13 drives the pressure plate 15 to contact the reinforcing cage. The front side of the support 6 is curved. With the above structure, when the impactor 11 applies transverse inward pressure to the circumferential reinforcing bars of the reinforcing cage through the support 6, the pressure plate 15 applies longitudinal inward pressure to the circumferential reinforcing bars. Through the mutual application of the above forces, the circumferential reinforcing bars are always in contact with the outer wall of the support 6, reducing the probability that the concrete blocked by the support 6 will enter the mold closing surface through the contact position between the support 6 and the reinforcing cage.

[0022] Please see Figure 3 A pressure rod 16 is welded to the front side of the pressure plate 15. The pressure rod 16 and the guide member 5 are on the same vertical plane. The pressure rod 16 enables the pressure plate 15 to drive the pressure rod 16 to apply longitudinal inward pressure to the circumferential steel bars. Since the pressure applied by the pressure rod 16 and the pressure applied by the support member 6 are on the same vertical plane, the circumferential steel bars are further prompted to always contact the support member 6.

[0023] A method for processing ultra-high strength prestressed concrete pipe piles includes the following steps: The first step is to cut the steel bars to a fixed length and then upset the ends of the cut steel bars to make them thicker. After that, the steel bars are rolled and welded to form a steel cage. The second step is to clean the inner cavity of the lower mold and spray a release agent on the inner wall of the lower mold 1. Then, the steel cage is put into the lower mold. The third step involves adding cement, sand, water, fly ash, mineral powder, silica fume, etc., to the mixing device. At the same time, high-performance admixtures are added to the mixing device. Then, the mixing device is run to finally obtain ultra-high strength concrete. The fourth step is to position the guide component 5 on both sides of the reinforcing cage and then transport the ultra-high strength concrete from the discharge port 3 into the lower mold. The fifth step is to close the upper and lower molds after the material is fed into the pipe pile, and then tension the closed molds to eliminate the stress inside the pipe pile. The sixth step is to place the mold on the centrifuge device, which will make the mold rotate rapidly, thereby forming a hollow cylindrical pipe pile inside the mold. After centrifugation is completed, the mold is opened and the formed pipe pile is taken out. The seventh step is to subject the formed pipe piles to multi-stage autoclaving to achieve the desired shape. Finally, the finished pipe piles are inspected.

[0024] The method of using (working principle) of this invention is as follows: During operation, the reinforcing cage is first placed into the cavity of the lower mold 1. Then, the moving mechanism moves the mounting platform 2 to the upper position of the reinforcing cage. Figure 5As shown, the first power mechanism then drives the rotating shaft 4 to rotate, causing the rotating shaft 4 to drive the guide member 5 to deflect downwards to its limit position. The downwardly deflected guide member 5 drives the support member 6 to move synchronously, ultimately causing the support member 6 to press against the two sides of the upper part of the reinforcing cage. Afterwards, concrete is transported from the discharge port 3 into the lower mold 1, and the moving mechanism drives the mounting platform 2 to move axially and slowly above the lower mold 1, so that the concrete gradually fills the area in the lower mold 1 surrounded by the reinforcing cage. During this process, the concrete will have a hard impact with the circumferential reinforcing bars of the reinforcing cage. Afterwards, the first power mechanism drives the turntable 10 to rotate at a constant speed, so that the turntable 10 drives the telescopic member 8 and the impact member 11 to intermittently approach the support member 6 through the connecting rod 9. When the impact member 11 approaches the support member 6, the impact member... Step 11 will cause contact teeth 12 to mesh with gear teeth 14, causing rotating component 13 to drive pressure plate 15 and pressure rod 16 to deflect downwards. Then, when the impact component contacts support component 6, it will generate an impact force on support component 6. This force is transmitted to the reinforcing cage through support component 6, causing the reinforcing cage to vibrate and prompting concrete to enter the lower mold 1 through the reinforcing cage. At this time, pressure plate 15 will drive pressure rod 16 to impact the upper side of the reinforcing cage, causing the circumferential reinforcing bars to always contact support component 6. After the concrete is delivered, the second power mechanism is stopped, causing the above structure to stop. Then, the first power mechanism drives the rotating shaft 4 to rotate and reset, causing guide component 5 to move upward and reset. Finally, the moving mechanism moves the mounting platform 2 away and closes the upper mold and lower mold 1. This is one work cycle.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A production equipment for ultra-high strength prestressed concrete pipe piles, comprising a lower mold (1), wherein a reinforcing cage is placed in the inner cavity of the lower mold (1), and an installation platform (2) is provided on the upper side of the reinforcing cage. The installation platform (2) is connected to a moving mechanism, and a discharge port (3) is fixedly installed in the middle of the installation platform (2). A rotating shaft (4) is rotatably installed on both sides of the upper side of the installation platform (2) at the discharge port (3). One side of the rotating shaft (4) is connected to a first power mechanism, and a guide member (5) is fixedly installed on the lower side of the circumference of the rotating shaft (4). The equipment is characterized in that: The guide (5) has a support (6) fixedly installed on the side facing the steel cage. When the guide (5) rotates downward to the limit position, the support (6) squeezes the steel cage. The guide member (5) has a telescopic cavity (7) located on the side of the support member (6) facing away from the steel cage. The telescopic cavity (7) is connected to the inner cavity of the support member (6). A telescopic member (8) is slidably installed in the telescopic cavity (7). An opening is provided inside the guide member (5) on the side of the telescopic cavity (7) facing away from the support member (6). The opening connects the external environment to the telescopic cavity (7). A connecting rod (9) is hinged to the side of the telescopic member (8) facing away from the support member (6). The other end of the connecting rod (9) passes through the opening. A second power mechanism is fixedly installed on the side of the guide member (5) facing away from the steel cage. A turntable (10) is rotatably installed on the front side of the second power mechanism. The other end of the connecting rod (9) is eccentrically hinged to the front side of the turntable (10). An impact member (11) is fixedly installed on the side of the telescopic member (8) facing the support member (6). The end of the impact member (11) near the steel cage extends into the inner cavity of the support member (6).

2. The production equipment for ultra-high strength prestressed concrete pipe piles according to claim 1, characterized in that: The upper side of the impact member (11) is fixedly equipped with contact teeth (12) at equal intervals. The inner cavity of the support member (6) is rotatably installed on the upper side of the impact member (11). The outer circumferential side of the rotating member (13) is fixedly equipped with gear teeth (14) at equal intervals. The contact teeth (12) and gear teeth (14) form a meshing connection. The rear end of the rotating member (13) extends out of the support member (6). The outer circumferential side of the rear end of the rotating member (13) is fixedly equipped with a pressure plate (15).

3. The production equipment for ultra-high strength prestressed concrete pipe piles according to claim 2, characterized in that: When the impactor (11) impacts the support (6), the rotating member (13) drives the pressure plate (15) to contact the steel cage. The front side of the support (6) is set with an arc surface.

4. The production equipment for ultra-high strength prestressed concrete pipe piles according to claim 3, characterized in that: A pressure rod (16) is fixedly installed on the front side of the pressure plate (15), and the pressure rod (16) and the guide (5) are on the same vertical plane.

5. The production equipment for ultra-high strength prestressed concrete pipe piles according to claim 1, characterized in that: The support member (6) is made of an elastic material.

6. A method for processing ultra-high strength prestressed concrete pipe piles, using the production equipment for ultra-high strength prestressed concrete pipe piles as described in claim 4, characterized in that: Includes the following steps: The first step is to cut the steel bars to a fixed length and then upset the ends of the cut steel bars to make them thicker. After that, the steel bars are rolled and welded to form a steel cage. The second step is to clean the inner cavity of the lower mold (1) and spray the inner wall of the lower mold (1) with a release agent. Then, the steel cage is put into the lower mold (1). The third step involves adding cement, sand, water, fly ash, mineral powder, and silica fume to the mixing device. At the same time, high-performance admixtures are added to the mixing device. Then, the mixing device is run to finally obtain ultra-high strength concrete. Fourth step, position the guide (5) on both sides of the steel cage and transport the ultra-high strength concrete from the discharge port (3) to the lower mold (1); Fifth step: After the material is conveyed, the upper mold and the lower mold (1) are closed, and the mold after closure is tensioned so that the stress in the pipe pile disappears. The sixth step is to place the mold on the centrifuge device, which will make the mold rotate rapidly, thereby forming a hollow cylindrical pipe pile inside the mold. After centrifugation is completed, the mold is opened and the formed pipe pile is taken out. The seventh step is to subject the formed pipe piles to multi-stage autoclaving to achieve the desired shape. Finally, the finished pipe piles are inspected.

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