PCCP Steam Curing Equipment and Methods

Abstract

This invention discloses a PCCP steam curing device, comprising: a steam chamber, part of which has an openable door panel that seals the opening on the side wall of the steam chamber; a plurality of first steam holes evenly distributed on the inner side wall of the steam chamber; a steam delivery pipe connected to each of the first steam holes within the side wall of the steam chamber; a movable hole on the top wall of the steam chamber; a hollow steam column of the same height as the steam chamber that is raised and lowered within the movable hole; a plurality of second steam holes evenly distributed on the side wall of the steam column; and the steam delivery pipe and the top of the steam column being connected to a steam generator outside the steam chamber via a steam delivery hose; a pair of horizontal moving tracks passing through the opening and extending outwards and inwards from the steam chamber at both ends; and a mold base plate located inside the steam chamber and movable on the moving tracks; a vertical PCCP core mounted on the mold base plate; a steam column inserted into the middle of the PCCP core with a gap between them. This invention can simultaneously perform all-round curing of the PCCP core, ensuring uniform heating and high quality.

Description

Technical Field

[0001] This invention relates to the field of concrete product manufacturing technology, specifically to a PCCP steam curing equipment and curing method. Background Technology

[0002] Prestressed concrete cylinder pipe (PCCP) refers to a water pipe made by winding circumferential prestressed steel wires around a high-strength concrete core with a steel cylinder, and then spraying a dense cement mortar protective layer on it. Most domestic PCCP pipe manufacturers and concrete product manufacturers require steam curing of PCCP cores or concrete products in their production processes to improve their quality. Although Chinese invention patent CN110370438A discloses an automatic control electric heating PCCP steam curing equipment and method, this equipment involves welding a steam generator to the bottom plate of the mold to steam cure the PCCP core on the mold bottom plate. The steam moves gradually upward from the bottom of the PCCP core, which prevents the heat from being quickly and evenly distributed to all parts of the core, easily leading to uneven heating of the core and quality problems. Summary of the Invention

[0003] This invention provides a PCCP steam curing device, which achieves simultaneous all-round steam curing of the inner and outer walls of the PCCP tube core by uniformly setting multiple first steam holes for steam dispersion on the side wall of the steam chamber, and inserting a steam column with multiple second steam holes for steam dispersion on the side wall of the PCCP tube core inside the PCCP tube core, thereby achieving the purpose of uniform heating of the PCCP tube core.

[0004] To achieve these and other advantages according to the present invention, a PCCP steam curing apparatus is provided, comprising:

[0005] A steam chamber, part of which has an openable door panel that seals the openings on the side walls of the steam chamber, has multiple first steam holes evenly distributed on the inner side wall of the steam chamber, and a steam transmission pipe connected to each of the first steam holes is provided inside the side wall of the steam chamber. A movable hole is provided on the top wall of the steam chamber, and a hollow steam column of the same height as the steam chamber is raised and lowered in the movable hole. Multiple second steam holes are evenly distributed on the side wall of the steam column. The steam transmission pipe and the top of the steam column are connected to a steam generating device outside the steam chamber through a steam transmission hose.

[0006] A pair of horizontally moving tracks pass through the opening and extend at both ends into and out of the steam chamber;

[0007] The mold base plate is located in the steam chamber and is movably mounted on the moving track. A vertical PCCP core is provided on the mold base plate, and the steam column is inserted in the middle of the PCCP core with a gap between them.

[0008] Preferably, in the PCCP steam curing equipment, a first support frame is provided on the side wall of the steam chamber, and a telescopic cylinder is provided on the first support frame located above the steam chamber, with the telescopic end of the telescopic cylinder connected to the top of the steam column.

[0009] Preferably, in the PCCP steam curing equipment, the steam chamber is cylindrical, and the edge of the top wall of the steam chamber connected to the side wall of the steam chamber extends upward to form a sealing outer cylinder. The sealing outer cylinder is movably connected to the side wall of the steam chamber through a threaded structure. The edge of the top wall of the steam chamber located at the connection hole extends upward to form a sealing inner cylinder, and the sealing inner cylinder is movably sleeved outside the steam column.

[0010] Preferably, in the PCCP steam curing equipment, a groove is provided on the mold base plate in the middle of the PCCP core, a horizontal support plate is rotatably arranged in the groove, a vertical threaded rod is provided on the support plate and multiple rotating plates are arranged around the threaded rod, a connecting hole is provided on the bottom wall of the steam column, a connecting pipe is fixedly arranged at the connecting hole and inserted into the steam column and sealed at the top, and the threaded rod is moved and inserted into the connecting pipe through the threaded structure so that the side wall of the steam column is located between the threaded rod and the rotating plate.

[0011] Preferably, in the PCCP steam curing equipment, a plurality of limiting blocks are provided on the side wall of the groove, and the support plate is located between the limiting blocks and the bottom plate of the groove.

[0012] Preferably, in the PCCP steam curing equipment, a vertical limiting plate is provided on the moving track located in the steam chamber, and the limiting plate is located on the side of the mold base plate away from the opening.

[0013] Preferably, in the PCCP steam curing equipment, a first winding wheel and a second winding wheel are rotatably arranged at the end of the moving track outside the steam chamber. The first winding wheel is connected to the bottom end of the mold base plate near the first winding wheel by a first pull rope, and the second winding wheel is connected to the bottom end of the mold base plate away from the first winding wheel by a second pull rope. The moving track is provided with a plurality of steering pulleys connected and supported by a second support frame. The first pull rope and the second pull rope respectively pass around the corresponding steering pulleys to provide horizontal tension to the mold base plate.

[0014] Preferably, in the PCCP steam curing equipment, the bottom of the mold base plate is provided with multiple connecting rings, and the first pull rope and the second pull rope are detachably connected to their corresponding connecting rings through a locking structure.

[0015] Preferably, in the PCCP steam curing equipment, a horizontal first rotating shaft is fixedly inserted in the middle of the first winding wheel, and a horizontal second rotating shaft is fixedly inserted in the middle of the second winding wheel. Both the first and second rotating shafts are rotatably mounted on a wheel frame located on the moving track. One end of the first rotating shaft is provided with a polyhedral prism-shaped first connecting block coaxial with it, and one end of the second rotating shaft is provided with a polyhedral prism-shaped second connecting block coaxial with it. A third support frame is provided at the end of the moving track outside the steam chamber. A motor is raised and lowered on the third support frame. A polyhedral prism-shaped main connecting block coaxial with it is provided at the output shaft end of the motor. A connecting sleeve with a matching internal shape is movably fitted on the main connecting block, and the first connecting block is movably inserted into the connecting sleeve.

[0016] The present invention also provides a method for curing PCCP using PCCP steam curing equipment, comprising the following steps:

[0017] Step 1: Open the openable door panel, move the pre-formed PCCP core along the moving track through the mold base plate to the appropriate position in the steam chamber, then adjust the position of the steam column by raising and lowering it and insert it into the PCCP core into the mold base plate, and then close the openable door panel.

[0018] Step 2: Turn on the steam generator to generate steam, and at the same time, let the steam enter the steam chamber through the steam delivery hose, steam delivery pipeline, first steam hole, steam column, and second steam hole to steam cure the PCCP core.

[0019] The present invention has at least the following beneficial effects: In the present invention, a plurality of first steam holes are uniformly arranged on the inner side wall of the steam chamber, and a steam transmission pipe is arranged in the inner side wall of the steam chamber, which is connected to each of the first steam holes. The steam column is inserted in the middle of the PCCP core and is at the same height as the steam chamber. A plurality of second steam holes are uniformly arranged on the inner side wall of the steam column. The top of the steam column and the steam transmission pipe are connected to the steam generating device outside the steam chamber through the steam transmission hose. The steam generated by the steam generating device enters the steam chamber in sequence through the steam transmission hose, the steam column, the second steam holes, the steam transmission pipe, and the first steam holes and is quickly and evenly distributed. The steam provides all-round steam curing for the inner and outer walls of the PCCP core at the same time, effectively avoiding the problem of uneven heating of the PCCP core caused by uneven distribution of steam heat, and improving the quality of the PCCP core.

[0020] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the internal structure of the PCCP steam curing equipment in one of the technical solutions of the present invention;

[0022] Figure 2 This is a top view of a portion of the PCCP steam curing equipment in one of the technical solutions of the present invention;

[0023] Figure 3 This is a schematic diagram illustrating the positional relationship between the openable door panel and the moving track in one of the technical solutions of the present invention;

[0024] Figure 4 This is a schematic diagram of the connection structure between the output shaft of the motor and the first rotating shaft in one of the technical solutions of the present invention;

[0025] Figure 5 This is a schematic diagram of the cross-sectional shape of the connecting sleeve and the main connecting block in one of the technical solutions of the present invention;

[0026] Among them, 1-steam chamber, 2-steam pipeline, 3-PCCP core, 4-steam column, 5-sealing outer cylinder, 6-sealing inner cylinder, 7-steam hose, 8-first support frame, 9-telescopic cylinder, 10-connecting pipe, 11-threaded rod, 12-rotating plate, 13-support plate, 14-mold base plate, 15-wheel frame, 16-first winding wheel, 17-motor, 18-third support frame, 19-second winding wheel, 20-moving track, 21-steering pulley, 22-first pull rope, 23-second pull rope, 24-limiting block, 25-limiting plate, 26-groove, 27-second support frame, 28-first rotating shaft, 29-openable door panel, 30-sealing block, 31-limiting screw, 32-main connecting block, 33-connecting sleeve, 34-first connecting block. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0028] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0029] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the reagents and materials mentioned are commercially available. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0030] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention provides a PCCP steam curing device, comprising:

[0031] A steam chamber 1 has a portion of its sidewalls configured as an openable door panel 29 that seals the openings on the sidewalls of the steam chamber 1. Multiple first steam holes are evenly distributed on the inner sidewall of the steam chamber 1. A steam transmission pipe 2, connected to each of the first steam holes, is installed inside the sidewall of the steam chamber 1. A movable hole is provided on the top wall of the steam chamber 1, and a hollow steam column 4, at the same height as the steam chamber 1, is raised and lowered within the movable hole. Multiple second steam holes are evenly distributed on the sidewall of the steam column 4. The steam transmission pipe 2 and the top of the steam column 4 are both connected to a steam generating device outside the steam chamber 1 via a steam transmission hose 7.

[0032] A pair of horizontally moving tracks 20 pass through the opening and extend at both ends into and out of the steam chamber 1, respectively.

[0033] The mold base plate 14 is located inside the steam chamber 1 and is movably mounted on the moving track 20. A vertical PCCP core 3 is provided on the mold base plate 14, and the steam column 4 is inserted in the middle of the PCCP core 3 with a gap between them.

[0034] The PCCP steam curing equipment provided in this technical solution mainly consists of a steam chamber 1, a mold base plate 14 for supporting the molding of the PCCP core 3, and a pair of horizontal moving tracks 20 for assisting the mold base plate 14 in entering and exiting the steam chamber 1. Part of the side wall of the steam chamber 1 is configured as an openable door panel 29 to seal the opening on the side wall of the steam chamber 1. The openable door panel 29 can be configured as a lifting type driven by a telescopic cylinder 9, moving up and down along the side wall of the steam chamber 1 at the opening to open or close the opening. Multiple first steam holes are evenly distributed on the inner side wall of the steam chamber 1, covering the entire inner side wall. Steam pipes 2, communicating with each of the first steam holes, are installed inside the side wall of the steam chamber 1. A movable hole is provided on the top wall of the steam chamber 1, into which a hollow steam column 4 is inserted and lowered. Multiple second steam holes are evenly distributed on the side wall of the steam column 4. Steam holes are evenly distributed on the side wall of the steam column 4. The steam pipe 2 and the top of the steam column 4 are connected to the steam generating device outside the steam chamber 1 through the steam hose 7. In order to make the steam quickly fill the steam chamber 1 and provide all-round curing for the PCCP core 3, the steam column 4 is set at the same height as the steam chamber 1. The bottom wall of the steam chamber 1 is provided with a water outlet for liquefied water to be discharged. A pair of moving tracks 20 pass through the open opening and extend to the inside and outside of the steam chamber 1 at both ends to allow the mold base plate 14 to move in and out of the steam chamber 1. A sealing block 30 can be inserted at the position of the opening door 29 on the moving track 20. The sealing block 30 can be inserted and removed as needed for steam release. The bottom of the mold base plate 14 is provided with rollers and is moved on the moving track 20 and moved into the steam chamber 1. A vertical PCCP core 3 is provided on the top of the mold base plate 14. The steam column 4 is inserted in the middle of the PCCP core 3 and a gap is left between the two for steam flow.

[0035] The maintenance method of the PCCP steam curing equipment provided in this technical solution is as follows: First, open the openable door 29, and move the initially formed PCCP core 3 along the moving track 20 through the mold base plate 14 to a suitable position in the steam chamber 1. Then, adjust the position of the steam column 4 by raising and lowering it and insert it into the PCCP core 3 into the mold base plate 14. After that, close the openable door 29, and then turn on the steam generator to generate steam. At the same time, allow the steam to enter the steam chamber 1 through the steam delivery hose 7, steam delivery pipe 2, first steam hole, steam column 4, and second steam hole. Steam curing is performed on the PCCP core 3 from top to bottom. After the curing is completed, the steam generator is turned off, the openable door 29 is opened, and the mold base plate 14 is moved so that the PCCP core 3 and the mold base plate 14 are moved out of the steam chamber 1 along the moving track 20. The mold base plate 14 and the PCCP core 3 are removed together and removed from the moving track 20. Then, the next mold base plate 14 is placed on the moving track 20 and the next PCCP core is initially formed. The above steam curing steps are repeated to carry out the forming and curing process of the next PCCP core 3.

[0036] This invention includes at least the following beneficial effects: A plurality of first steam holes are evenly arranged on the inner wall of the steam chamber 1; a steam delivery pipe 2, communicating with each of the first steam holes, is arranged inside the side wall of the steam chamber 1; a steam column 4 is inserted in the middle of the PCCP core 3 and is at the same height as the steam chamber 1; a plurality of second steam holes are evenly arranged on the side wall of the steam column 4; the top of the steam column 4 and the steam delivery pipe 2 are both connected to a steam generating device outside the steam chamber 1 via a steam delivery hose 7; the steam generated by the steam generating device enters the steam chamber 1 sequentially through the steam delivery hose 7, the steam column 4, the second steam holes, the steam delivery pipe 2, and the first steam holes, and is rapidly and evenly distributed, providing simultaneous all-round steam curing of the inner and outer walls of the PCCP core 3, effectively avoiding… To prevent uneven heating of the PCCP core 3 due to uneven heat distribution from steam, the quality of the PCCP core 3 is improved. A movable hole is provided on the top wall of the steam chamber 1, and a steam column 4 is installed in the movable hole, which can be adjusted to change the depth of the steam column 4 inserted into the PCCP core 3, and adjust the steam volume and maintenance position. An open opening is provided on the side wall of the steam chamber 1, and a pair of horizontal moving rails 20 pass through the open opening of the side wall of the steam chamber 1 and extend into and out of the steam chamber 1 at both ends. The PCCP core 3 is placed on the mold base plate 14 and is movable on the moving rails 20. Moving the mold base plate 14 along the moving rails 20 can control the PCCP core 3 to enter and exit the steam chamber 1, which is convenient, quick and easy to operate.

[0037] In another technical solution, such as Figure 1 As shown, in the PCCP steam curing equipment, a first support frame 8 is provided on the side wall of the steam chamber 1, and a telescopic cylinder 9 is provided on the first support frame 8 located above the steam chamber 1. The telescopic end of the telescopic cylinder 9 is connected to the top of the steam column 4. The telescopic cylinder 9 is used to control the lifting and lowering and position of the steam column 4.

[0038] In another technical solution, such as Figure 1 As shown, in the PCCP steam curing equipment, the steam chamber 1 is cylindrical, and the edge of the top wall of the steam chamber 1, which is connected to the side wall of the steam chamber 1, extends upward to form a sealing outer cylinder 5. The sealing outer cylinder 5 is movably connected to the side wall of the steam chamber 1 through a threaded structure. The edge of the top wall of the steam chamber 1 located at the connection hole extends upward to form a sealing inner cylinder 6. The sealing inner cylinder 6 is movably sleeved outside the steam column 4. Rotating the top wall of steam chamber 1 or the outer sealing cylinder 5 or the inner sealing cylinder 6 allows the top wall of steam chamber 1 to move up and down along the side wall of steam chamber 1, simultaneously moving the inner sealing cylinder 6 and the outer sealing cylinder 5 up and down to adjust the internal height of steam chamber 1. This adapts to the all-round maintenance of PCCP cores 3 at different heights, preventing the interior of steam chamber 1 from being too high above the PCCP cores 3 and wasting steam resources. The inner sealing cylinder 6 moves up and down close to the outer wall of steam column 4 to seal the unused second steam hole on the side wall of steam column 4, and the outer sealing cylinder 5 moves up and down close to the side wall of steam chamber 1 to seal the unused first steam hole on the side wall of steam chamber 1, thus preventing steam waste.

[0039] In another technical solution, such as Figure 1 , Figure 2 As shown, in the PCCP steam curing equipment, a groove 26 is provided on the mold base plate 14 in the middle of the PCCP core 3. A horizontal support plate 13 is rotatably arranged in the groove 26. A vertical threaded rod 11 is provided on the support plate 13, and multiple rotating plates 12 are arranged around the threaded rod 11. A connecting hole is provided on the bottom wall of the steam column 4. A connecting pipe 10 is fixedly installed at the connecting hole, inserted into the steam column 4 and sealed at the top. The threaded rod 11 is moved and inserted into the connecting pipe 10 through a threaded structure, so that the side wall of the steam column 4 is located between the threaded rod 11 and the rotating plates 12. The rise and fall of the steam column 4 causes the connecting pipe 10 to move up and down relative to the threaded rod 11, and at the same time, the threaded rod 11 rotates, thereby driving the support plate 13 and the rotating plates 12 to rotate, agitating the steam in the PCCP core 3 and accelerating the gas flow.

[0040] In another technical solution, such as Figure 1 As shown, in the PCCP steam curing equipment, multiple limiting blocks 24 are provided on the side wall of the groove 26, and the support plate 13 is located between the limiting blocks 24 and the bottom plate of the groove 26. Multiple ball bearings are provided between the support plate 13 and the bottom plate of the groove 26, and ball bearings are also provided at the bottom of the limiting blocks 24 to facilitate the rotation of the support plate 13; the limiting blocks 24 are used to restrict the position of the support plate 13 and prevent it from dislodging from the groove 26.

[0041] In another technical solution, such as Figure 1 , Figure 2 As shown, in the PCCP steam curing equipment, a vertical limiting plate 25 is provided on the moving track 20 located in the steam chamber 1. The limiting plate 25 is located on the side of the mold base plate 14 away from the opening. The limiting plate 25 prevents the mold base plate 14 from moving excessively.

[0042] In another technical solution, such as Figure 1 , Figure 2 , Figure 3As shown, in the PCCP steam curing equipment, a first winding wheel 16 and a second winding wheel 19 are rotatably arranged at the end of the moving track 20 located outside the steam chamber 1. The first winding wheel 16 is connected to the bottom end of the mold base plate 14 near the first winding wheel 16 by a first pull rope 22. The second winding wheel 19 is connected to the bottom end of the mold base plate 14 away from the first winding wheel 16 by a second pull rope 23. The moving track 20 is provided with a plurality of steering pulleys 21 connected and supported by a second support frame 27. The first pull rope 22 and the second pull rope 23 respectively pass around the steering pulleys 21 that are adapted to them to provide horizontal tension to the mold base plate 14. The second pull rope 23 provides a horizontal pulling force to the mold base plate 14 in the direction of entering the steam chamber 1 through the steering pulley 21 located on the side of the mold base plate 14 away from the first winding wheel 16, and is tightened by the second winding wheel 19, pulling the mold base plate 14 and the PCCP core 3 into the steam chamber 1. The first pull rope 22 provides a horizontal pulling force to the mold base plate 14 in the direction of moving out of the steam chamber 1, and is tightened by the first winding wheel 16. The operator only needs to operate the first winding wheel 16 or the second winding wheel 19 from the outside of the steam chamber 1 to control the position of the mold base plate 14 on the moving track 20. The multiple steering pulleys 21 adapt to changing the direction of the pull rope tension and can prevent the first pull rope 22 and the second pull rope 23 from getting tangled together.

[0043] In another technical solution, in the PCCP steam curing equipment, the bottom of the mold base plate is provided with multiple connecting rings, and the first pull rope and the second pull rope are detachably connected to their corresponding connecting rings through a locking structure. This makes the assembly and disassembly of the mold base plate with the first pull rope and the second pull rope flexible and convenient.

[0044] In another technical solution, such as Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, in the PCCP steam curing equipment, a horizontal first rotating shaft 28 is fixedly inserted in the middle of the first winding wheel 16, and a horizontal second rotating shaft is fixedly inserted in the middle of the second winding wheel 19. The first rotating shaft 28 and the second rotating shaft are both rotatably mounted on the wheel frame 15 located on the moving track 20. One end of the first rotating shaft 28 is provided with a polyhedral first connecting block 34 coaxial with it, and one end of the second rotating shaft is provided with a polyhedral second connecting block coaxial with it.

[0045] A third support frame 18 is provided at the end of the moving track 20 located outside the steam chamber 1. A motor 17 is raised and lowered on the third support frame 18. A multi-faceted prism-shaped main connecting block 32 is provided at the output shaft end of the motor 17. A connecting sleeve 33 with a matching internal shape is movably sleeved on the main connecting block 32. The first connecting block 34 is moved and inserted into the connecting sleeve 33.

[0046] When motor 17 is started, its output shaft directly or indirectly drives the main connecting block 32, connecting sleeve 33, first connecting block 34, first rotating shaft 28, and first winding wheel 16 to rotate, thereby winding and tightening the first pull rope 22, pulling the mold base plate 14 to gradually move out of the steam chamber 1. At the same time, the mold base plate 14 pulls the second pull rope 23, causing the second winding wheel 19 to rotate and continuously release the rope. When it is necessary to pull the mold base plate 14 into the steam chamber 1, first move the connecting sleeve 33 along the main connecting block 32 towards the direction closer to motor 17 until the first connecting block 34 separates from the connecting sleeve 33, and then start the motor 17. The machine 17 descends until the second connecting block is opposite to the main connecting block 32. The connecting sleeve 33 moves away from the motor 17, so that the second connecting block is inserted into the connecting sleeve 33. Then the motor 17 is started, so that the output shaft of the motor 17 directly or indirectly drives the main connecting block 32, the connecting sleeve 33, the second connecting block, the second rotating shaft, and the second winding wheel 19 to rotate. This causes the second pull rope 23 to be wound and tightened, pulling the mold base plate 14 to move along the moving track 20 and gradually enter the steam chamber 1. At the same time, the mold base plate 14 pulls the first pull rope 22, causing the first winding wheel 16 to rotate and continuously release the rope. In this technical solution, the motor 17 is designed for lifting, and the main connecting block 32, the first connecting block 34, and the second connecting block have the same cross-sectional shape and size, and can all move within the connecting sleeve 33. This allows the connecting sleeve 33 to connect and limit the main connecting block 32 and the first connecting block 34, or the main connecting block 32 and the second connecting block. The same motor 17 can then drive the first rotating shaft 28 or the second rotating shaft to rotate. The motor 17 can be driven to lift and lower via the telescopic cylinder 9. In this technical solution, the length of the main connecting block 32 is greater than the length of the connecting sleeve 33. A limit hole can be provided on the main connecting block 32, and a limit screw 31 is inserted into the limit hole. The connecting sleeve 33 is fitted onto the main connecting block 32 and the first connecting block 34 located between the limit screw 31 and the first rotating shaft 28, preventing excessive axial movement of the connecting sleeve 33 during rotation.

[0047] The present invention also provides a method for curing PCCP using PCCP steam curing equipment, comprising the following steps:

[0048] Step 1: Open the openable door panel 29, and move the initially formed PCCP core 3 along the moving track 20 through the mold base plate 14 to the appropriate position in the steam chamber 1. Then, adjust the position of the steam column 4 by raising and lowering it and insert it into the PCCP core 3 into the mold base plate 14. Then close the openable door panel 29.

[0049] Step 2: Turn on the steam generator to generate steam, and at the same time, let the steam enter the steam chamber 1 through the steam delivery hose 7, steam delivery pipe 2, first steam hole, steam column 4, and second steam hole to steam cure the PCCP core 3.

[0050] The following embodiments are provided according to the PCCP steam curing equipment and curing method of the present invention:

[0051] A method for curing PCCP using PCCP steam curing equipment includes the following steps:

[0052] Step 1: Adjust the position of the motor 17 by raising and lowering it so that the main connecting block 32 on the output shaft of the motor 17 is coaxially aligned with the second connecting block. Move the connecting sleeve 33 so that both the second connecting block and the main connecting block 32 are inserted into the connecting sleeve 33. At the same time, open the openable door 29. Then start the motor 17 so that the second rotating shaft drives the second winding wheel 19 to rotate. The second pull rope 23 tightens and continuously winds onto the second winding wheel 19. At the same time, pull the mold base plate 14 carrying the initially formed PCCP core 3 along the moving track 20 to the inside of the steam chamber 1 so that the steam column 4 is directly above the PCCP core 3. Then raise and lower the position of the steam column 4 so that it is inserted into the middle of the PCCP core 3 to the mold base plate 14 and the threaded rod 11 is inserted into the connecting pipe 10. Then rotate the sealing outer cylinder 5 so that the top wall of the steam chamber 1 is raised and lowered to a position slightly higher than the PCCP core 3. Close the openable door 29.

[0053] Step 2: Turn on the steam generator to continuously generate water steam, and at the same time allow the water steam to enter the steam chamber 1 through the steam delivery hose 7, steam delivery pipe 2, first steam hole, steam column 4, and second steam hole, and simultaneously reach the inner and outer walls of the PCCP core 3 for all-round steam curing.

[0054] Step 3: Move the lifting steam column for 5 minutes every 60-80 minutes to make the tray rotate and drive the rotating plate 12 to rotate and stir the water vapor inside the steam chamber 1, thereby accelerating the flow of water vapor and rapidly transferring heat.

[0055] Step 4: After the steam curing time is met, turn off the steam generator, rotate the sealing outer cylinder 5 to adjust the top wall of the steam chamber 1 to the initial position, then move the steam column 4 up to the initial position, and at the same time move the connecting sleeve 33 to separate it from the second connecting block and adjust the position of the motor 17 so that the main connecting block 32 is coaxially aligned with the first connecting block 34. Move the connecting sleeve 33 so that the first connecting block 34 and the main connecting block 32 are both inserted into the connecting sleeve 33. At the same time, open the openable door 29, then start the motor 17 so that the first rotating shaft 28 drives the first winding wheel 16 to rotate. The first pull rope 22 tightens and continuously winds onto the first winding wheel 16. At the same time, pull the mold base plate 14 carrying the PCCP core 3 along the moving track 20 to move out of the steam chamber 1. At the same time, turn off the motor 17 and the openable door 29.

[0056] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0057] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A PCCP steam curing equipment, characterized in that, include: A steam chamber, part of which has an openable door panel that seals the openings on the side walls of the steam chamber, has multiple first steam holes evenly distributed on the inner side wall of the steam chamber, and a steam transmission pipe connected to each of the first steam holes is provided inside the side wall of the steam chamber. A movable hole is provided on the top wall of the steam chamber, and a hollow steam column of the same height as the steam chamber is raised and lowered in the movable hole. Multiple second steam holes are evenly distributed on the side wall of the steam column. The steam transmission pipe and the top of the steam column are connected to a steam generating device outside the steam chamber through a steam transmission hose. A pair of horizontally moving tracks pass through the opening and extend at both ends into and out of the steam chamber; A mold base plate is located in the steam chamber and is movably mounted on the moving track. A vertical PCCP core is provided on the mold base plate, and the steam column is inserted in the middle of the PCCP core with a gap between them. A groove is provided on the mold base plate in the middle of the PCCP core. A horizontal support plate is rotatably arranged in the groove. A vertical threaded rod is provided on the support plate, and multiple rotating plates are arranged around the threaded rod. A connecting hole is provided on the bottom wall of the steam column. A connecting pipe is fixedly installed in the connecting hole and inserted into the steam column with its top sealed. The threaded rod is moved and inserted into the connecting pipe through a threaded structure, so that the side wall of the steam column is located between the threaded rod and the rotating plates. Multiple limiting blocks are provided on the side wall of the groove, and the support plate is located between the limiting blocks and the bottom plate of the groove.

2. The PCCP steam curing equipment as described in claim 1, characterized in that, A first support frame is provided on the side wall of the steam chamber, and a telescopic cylinder is provided on the first support frame located above the steam chamber. The telescopic end of the telescopic cylinder is connected to the top of the steam column.

3. The PCCP steam curing equipment as described in claim 1, characterized in that, The steam chamber is cylindrical, and the edge of the top wall of the steam chamber, which is connected to the side wall of the steam chamber, extends upward to form a sealing outer cylinder. The sealing outer cylinder is movably connected to the side wall of the steam chamber through a threaded structure. The edge of the top wall of the steam chamber located at the connection hole extends upward to form a sealing inner cylinder, which is movably sleeved outside the steam column.

4. The PCCP steam curing equipment as described in claim 1, characterized in that, A vertical limiting plate is provided on the moving track located in the steam chamber, and the limiting plate is located on the side of the mold base plate away from the opening.

5. The PCCP steam curing equipment as described in claim 1, characterized in that, Located at the end of the movable track outside the steam chamber, a first winding wheel and a second winding wheel are rotatably arranged vertically. The first winding wheel is connected to the bottom end of the mold base plate near the first winding wheel via a first pull rope. The second winding wheel is connected to the bottom end of the mold base plate away from the first winding wheel via a second pull rope. The movable track is provided with multiple steering pulleys connected and supported by a second support frame. The first pull rope and the second pull rope respectively pass around the corresponding steering pulleys to provide horizontal tension to the mold base plate.

6. The PCCP steam curing equipment as described in claim 5, characterized in that, The bottom of the mold base plate is provided with multiple connecting rings, and the first pull rope and the second pull rope are detachably connected to their corresponding connecting rings through a locking structure.

7. The PCCP steam curing equipment as described in claim 5, characterized in that, A horizontal first rotating shaft is fixedly inserted in the middle of the first winding wheel, and a horizontal second rotating shaft is fixedly inserted in the middle of the second winding wheel. Both the first and second rotating shafts are rotatably mounted on a wheel frame located on the moving track. One end of the first rotating shaft is provided with a polyhedral first connecting block coaxial with it, and one end of the second rotating shaft is provided with a polyhedral second connecting block coaxial with it. A third support frame is provided at the end of the moving track located outside the steam room. A motor is raised and lowered on the third support frame. A polyhedral main connecting block coaxial with it is provided at the output shaft end of the motor. A connecting sleeve with a matching internal shape is movably fitted on the main connecting block, and the first connecting block is movably inserted into the connecting sleeve.

8. A method for curing PCCP using the PCCP steam curing equipment according to any one of claims 1 to 7, characterized in that, Includes the following steps: Step 1: Open the openable door panel, move the pre-formed PCCP core along the moving track through the mold base plate to the appropriate position in the steam chamber, then adjust the position of the steam column by raising and lowering it and insert it into the PCCP core into the mold base plate, and then close the openable door panel. Step 2: Turn on the steam generator to generate steam, and at the same time, let the steam enter the steam chamber through the steam delivery hose, steam delivery pipeline, first steam hole, steam column, and second steam hole to steam cure the PCCP core.

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