Large-diameter PCCP (prestressed concrete cylinder pipe) inner seam treatment construction platform

Abstract

The invention relates to a pipeline joint construction device, in particular to a large-diameter PCCP (prestressed concrete cylinder pipe) inner joint treatment construction platform which comprises a thin steel plate platform, a telescopic driving mechanism, an attaching and pressing locking mechanism, a walking driving mechanism, a balance fine adjustment mechanism and a movable crawling ladder. The upper portion of the supporting beam frame is in a trapezoid shape, walking rollers used for making contact with the inner wall of the PCCP are rotationally hinged to the left side and the right side of the upper portion of the supporting beam frame, a U-shaped frame body is fixedly connected to the lower portion of the supporting beam frame, and a telescopic driving mechanism is installed at the center of the thin steel plate platform. The left side and the right side of the bottom of the thin steel plate platform are provided with attaching and pressing locking mechanisms through supporting beam frames. The operation platform can adopt a modular welding mode, production, processing and assembly are facilitated, all functional modules can be spliced and welded into a whole on site, installation is very easy and convenient, all components are light, and the operation difficulty is low.

Description

Technical Field

[0001] The present invention relates to a pipeline joint construction device, and in particular to a construction platform for treating the inner joint of a large-diameter PCCP pipeline. Background Art

[0002] In the construction of water resource allocation projects, the buried pipe section of PCCP pipes is relatively long. The pipes are usually connected by socket and spigot joints, and the joint gaps on the water-passing side inside the pipes must be filled with grout. After the pipes are installed, the pipe top is relatively high, which belongs to high-altitude operations; the number of adjacent joints for each pipe is very large, up to thousands, and the working space inside the pipe is limited and narrow, and it is not easy to stand stably on the inner arc surface. During the construction process, the inner part of the joint is divided into three areas, and different consistency ratios are used for construction. Among them, the upper and left and right side areas are not convenient for operators to perform joint treatment operations. The long installed pipes belong to confined space operations during the operation inside the pipes, and a lot of energy is required to complete the confined space operations, and there are great safety hazards.

[0003] Therefore, without a stable working platform, it is difficult to accurately send the grout into the gap. The expansive mortar will fall off without continuous and timely stability, which is extremely easy to cause waste of the expansive mortar. To speed up the construction progress, reduce the waste of mortar, and ensure the operation safety, there is an urgent need for an adjustable and retractable joint treatment construction platform for grouting that can be stably supported, simply installed, and easily moved frequently, so as to improve the joint treatment efficiency and at the same time meet the problem that the joint gap width is narrow and the operators need to perform upward grouting construction. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a construction platform for treating the inner joint of a large-diameter PCCP pipeline in view of the deficiencies of the prior art.

[0005] The technical problem to be solved by the present invention is achieved through the following technical solutions. The present invention discloses a construction platform for inner seam treatment of large-diameter PCCP pipes, which includes a thin steel plate platform, a telescopic driving mechanism, a pressing and locking mechanism, a walking driving mechanism, a balance fine-tuning mechanism, and a movable ladder. The thin steel plate platform includes railings on the outer periphery and support beam frames fixedly connected to the bottom. The upper part of the support beam frame is trapezoidal. Walking rollers for contacting the inner wall of the PCCP pipe are rotatably hinged on the left and right sides of the upper part of the support beam frame. A U-shaped frame body is fixedly connected to the lower part of the support beam frame. A telescopic driving mechanism is installed at the center of the thin steel plate platform. Pressing and locking mechanisms are installed on the left and right sides of the bottom of the thin steel plate platform through the support beam frames. The telescopic driving mechanism includes a push rod with a horizontally moving output end. The left and right sides of the telescopic driving mechanism are drivingly connected to the corresponding pressing and locking mechanisms through the push rod. Balance fine-tuning mechanisms are installed on both the left and right sides of the U-shaped frame body of the support beam frame. A walking driving mechanism for driving the overall displacement of the platform is provided on the lower side of the middle part of the U-shaped frame body of the support beam frame. The balance fine-tuning mechanism is used for fine-tuning the balance state on the left and right sides after the thin steel plate platform is displaced. The movable ladder is used to be placed on the side of the thin steel plate platform.

[0006] The technical problem to be solved by the present invention can also be further achieved through the following technical solutions. The telescopic driving mechanism includes a first handwheel mechanism, a box body, a first worm and worm gear assembly, and a push rod. The first handwheel mechanism is rotatably installed in the middle of the thin steel plate platform. The bottom of the first handwheel mechanism passes through the thin steel plate platform and is connected to a bevel gear transmission assembly. The first worm and worm gear assembly is drivingly connected to the bevel gear transmission assembly. A central driving sleeve is installed through the middle of the first worm and worm gear assembly. Push rods are installed on both the left and right sides of the box body. The central driving sleeve is drivingly connected to the push rod.

[0007] The technical problem to be solved by the present invention can also be further achieved through the following technical solutions. The bevel gear transmission assembly includes an upper bevel gear body and a lower bevel gear body. A fixed cross bar is provided on the upper part of the box body. The upper bevel gear body is horizontally connected to the bottom end of the first handwheel mechanism. The lower bevel gear body is vertically rotatably installed on the fixed cross bar. The first worm and worm gear assembly includes a worm body at the upper part. The lower bevel gear body is coaxially fixedly connected to the worm body.

[0008] The technical problem to be solved by the present invention can also be further achieved through the following technical solutions. A driving thread is provided inside the central driving sleeve. A side shaft sleeve is embedded in the box body. The side shaft sleeve slidably inserts the push rod. A rotary limiting groove is provided on the outer side of the push rod. The side shaft sleeve is provided with a limiting convex block corresponding to the limiting groove. A spiral head is provided at the outer end of the push rod. The spiral head is screwed and connected to the central driving sleeve.

[0009] The technical problem to be solved by the present invention can also be further realized by the following technical solution. The pressing and locking mechanism includes a deflecting fork rod. Connecting blocks are provided on the left and right sides of the U-shaped frame body of the support beam frame. The top end of the deflecting fork rod is provided with a fork head, and the fork head is rotatably connected to the connecting block. The connecting block is provided with a horizontal hole, and the end of the push rod passes through the horizontal hole and is rotatably connected with a driving connecting rod. The bottom end of the driving connecting rod is hinged to the middle part of the deflecting fork rod.

[0010] The technical problem to be solved by the present invention can also be further realized by the following technical solution. The bottom end of the deflecting fork rod is hinged with a floating gate plate. The cross section of the floating gate plate is arc-shaped, and a rubber cushion is provided on the bottom surface of the floating gate plate.

[0011] The technical problem to be solved by the present invention can also be further realized by the following technical solution. The balance fine-tuning mechanism includes a floating vertical rod, a reduction motor mechanism, a second worm and gear mechanism, and a second handwheel mechanism. The floating vertical rod is slidably inserted into the bottom of the U-shaped frame body of the support beam frame. The second worm and gear mechanism is fixedly attached and installed on the outer side of the lower part of the floating vertical rod. The second worm and gear mechanism is driven by the reduction motor mechanism. The second handwheel mechanism is fixedly installed on the upper part of the thin steel plate platform. The second handwheel mechanism includes a step control device for controlling the reduction motor mechanism.

[0012] The technical problem to be solved by the present invention can also be further realized by the following technical solution. The top end of the floating vertical rod is fixedly installed with a connecting top plate. The connecting top plate is connected with the upper side of the bottom of the U-shaped frame body of the support beam frame through a tension spring to form a floating constraint.

[0013] The technical problem to be solved by the present invention can also be further realized by the following technical solution. The worm of the second worm and gear mechanism is connected with a chain drive assembly. The bottom end of the floating vertical rod is installed with a friction rubber wheel for contacting the inner wall of the pipeline. The chain drive assembly includes an upper chain sprocket, a lower chain sprocket and a chain. The upper chain sprocket and the lower chain sprocket are respectively coaxially connected with the worm of the second worm and gear mechanism and the friction rubber wheel in sequence.

[0014] The present invention has the following advantages compared with the prior art:

[0015] (1) The operation platform of the present invention can adopt a modular welding method, which is convenient for production, processing and assembly. Each functional module can be assembled and welded on-site into one body, and the installation is very simple. Moreover, each part component is light, and the operation difficulty is low.

[0016] (2) The operators of the present invention go up and down the platform through the retractable ladder and transport the prepared mortar materials. After moving to a new construction position, they can manually adjust the balance posture according to the construction characteristics, and then fix and lock the whole mechanism through the support mechanism. By skillfully using the arc geometric relationship to realize support and clamping, the stability of the support during the construction process is improved.

[0017] (3) The present invention can change the construction position through the walking drive mechanism, thus eliminating the need for manual pushing of the platform, reducing the number of times of getting on and off the platform, improving the stability performance of the platform, while reducing the waste of expansion mortar caused by improper operation during handling, and also accelerating the grouting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic installation cross-sectional view of the overall structure of the present invention;

[0019] Figure 2 is a schematic top view structure diagram of the present invention after removing the steel plate of the thin steel plate platform 1;

[0020] Figure 3 is a schematic internal structure diagram of the telescopic drive mechanism 2 of the present invention;

[0021] Figure 4 is a schematic structure diagram of the pressing and locking mechanism 3 of the present invention;

[0022] Figure 5 is a schematic structure diagram of the balance fine-tuning mechanism 5 of the present invention;

[0023] 1 - Thin steel plate platform, 11 - Railings, 12 - Support beam frame, 121 - Connecting block, 122 - Walking roller, 2 - Telescopic drive mechanism, 21 - First handwheel mechanism, 211 - Bevel gear transmission component, 22 - Box body, 221 - Side bushing, 23 - First worm and worm gear component, 231 - Worm body, 232 - Central drive sleeve, 24 - Push rod, 241 - Spiral head, 3 - Pressing and locking mechanism, 31 - Deflection fork rod, 311 - Driving link, 312 - Floating gate, 4 - Walking drive mechanism, 5 - Balance fine-tuning mechanism, 51 - Connecting top plate, 511 - Tension spring, 52 - Floating vertical rod, 53 - Reduction motor mechanism, 54 - Second worm and worm gear mechanism, 55 - Chain drive component, 56 - Friction rubber wheel, 57 - Second handwheel mechanism, 6 - Movable ladder, 7 - PCCP pipeline, 8 - Concrete foundation. DETAILED DESCRIPTION OF THE INVENTION

[0024] As Figures 1-5As shown in the figure, the present invention is used for the treatment construction of the inner seam of the PCCP pipeline 7. Usually, the PCCP pipeline 7 is fixedly installed through the concrete pedestal 8. The inner contact surface of the PCCP pipeline 7 is arc-shaped. It is inconvenient for ordinary support frames to move during the construction inside the pipeline. Therefore, the present invention provides a construction platform for treating the inner seam of a large-diameter PCCP pipeline 7, which includes a thin steel plate platform 1, a telescopic driving mechanism 2, a pressing and locking mechanism 3, a walking driving mechanism 4, a balance fine-tuning mechanism 5 and a movable ladder 6. The thin steel plate platform 1 includes a railing 11 on the outer periphery and a support beam frame 12 fixedly connected to the bottom. The upper part of the support beam frame 12 is trapezoidal. Walking rollers 122 for contacting the inner wall of the PCCP pipeline 7 are rotatably hinged on the left and right sides of the upper part of the support beam frame 12. The lower part of the support beam frame 12 is fixedly connected with a U-shaped frame body to form an integral support frame structure. During the specific on-site installation, modular assembly and welding of the above components can be carried out.

[0025] A telescopic driving mechanism 2 is installed at the center of the thin steel plate platform 1. Pressing and locking mechanisms 3 are installed on the left and right sides of the bottom of the thin steel plate platform 1 through the support beam frame 12. The telescopic driving mechanism 2 includes a push rod 24 with a horizontally moving output end. The pressing and locking mechanism 3 includes a deflecting fork rod 31. Connecting blocks 121 are provided on the left and right sides of the U-shaped frame body of the support beam frame 12. The top end of the deflecting fork rod 31 is provided with a fork head, and the fork head is rotatably connected to the connecting block 121. The connecting block 121 is provided with a horizontal hole, and the end of the push rod 24 passes through the horizontal hole and is rotatably connected with a driving connecting rod 311. The bottom end of the driving connecting rod 311 is hinged to the middle of the deflecting fork rod 31. The bottom end of the deflecting fork rod 31 is hinged with a floating gate plate 312. The cross-section of the floating gate plate 312 is arc-shaped, and a rubber cushion is provided on the bottom surface of the floating gate plate 312. The left and right sides of the telescopic driving mechanism 2 are drivingly connected to the corresponding pressing and locking mechanisms 3 through the push rod 24.

[0026] Specifically, the telescopic driving mechanism 2 includes a first handwheel mechanism 21, a box body 22, a first worm and worm gear assembly 23, and a push rod 24. The first handwheel mechanism 21 is rotatably installed in the middle of the thin steel plate platform 1. A bevel gear transmission assembly 211 is connected to the bottom of the first handwheel mechanism 21 through the thin steel plate platform 1. The first worm and worm gear assembly 23 is drivingly connected to the bevel gear transmission assembly 211. A central driving sleeve 232 is installed through the middle of the first worm and worm gear assembly 23. Push rods 24 are installed on the left and right sides of the box body 22. The central driving sleeve 232 is drivingly connected to the push rods 24. The bevel gear transmission assembly 211 includes an upper bevel gear body and a lower bevel gear body. A fixed cross bar is provided on the upper part of the box body 22. The upper bevel gear body is horizontally connected to the bottom end of the first handwheel mechanism 21. The lower bevel gear body is vertically rotatably installed on the fixed cross bar. The first worm and worm gear assembly 23 includes a worm body 231 at the upper part. The lower bevel gear body is coaxially and fixedly connected to the worm body 231. A driving thread is provided inside the central driving sleeve 232. A side shaft sleeve 221 is embedded in the box body 22. The side shaft sleeve 221 is slidably inserted with the push rod 24. A rotary limit groove is provided on the outer side of the push rod 24. The side shaft sleeve 221 is provided with a limit convex block corresponding to the limit groove. A spiral head 241 is provided at the outer end of the push rod 24. The spiral head 241 is screwed to the central driving sleeve 232.

[0027] Balancing fine-tuning mechanisms 5 are installed on both the left and right sides of the U-shaped frame of the support beam frame 12. The balancing fine-tuning mechanism 5 includes a floating vertical rod 52, a reduction motor mechanism 53, a second worm and worm gear mechanism 54, and a second handwheel mechanism 57. The floating vertical rod 52 is slidably inserted into the bottom of the U-shaped frame of the support beam frame 12. The second worm and worm gear mechanism 54 is fixedly attached to the outer side of the lower part of the floating vertical rod 52. The second worm and worm gear mechanism 54 is driven by the reduction motor mechanism 53. The second handwheel mechanism 57 is fixedly installed on the upper part of the thin steel plate platform 1. The second handwheel mechanism 57 includes a stepper control device for controlling the reduction motor mechanism 53. A connecting top plate 51 is fixedly installed at the top of the floating vertical rod 52. The connecting top plate 51 is connected to the upper side of the bottom of the U-shaped frame of the support beam frame 12 through a tension spring 511 to form a floating restraint. The worm of the second worm and worm gear mechanism 54 is connected with a chain drive assembly 55. A friction rubber wheel 56 for contacting the inner wall of the pipeline is installed at the bottom end of the floating vertical rod 52. The chain drive assembly 55 includes an upper sprocket, a lower sprocket, and a chain. The upper sprocket and the lower sprocket are respectively coaxially connected to the worm of the second worm and worm gear mechanism 54 and the friction rubber wheel 56 in sequence. The friction rubber wheel 56 is pressed against the inner wall surface of the pipeline through the tension spring 511 to form a frictional drive. In order to avoid excessive wear of the friction rubber wheel 56, those skilled in the art can also change the floating lifting mode of the friction rubber wheel 56 to be driven by a cylinder or a motor rack, so that when the thin steel plate platform 1 moves and displaces, the friction rubber wheel 56 disengages from contact, thereby reducing longitudinal wear and resistance.

[0028] The above-mentioned balancing fine-tuning mechanism 5 is used for the left and right side balance state fine-tuning process after the thin steel plate platform 1 is displaced. The balancing fine-tuning mechanism 5 is arranged at the bottom of the support beam frame 12, and the overall deflection of the platform structure is carried out through the friction rubber wheel 56. The left and right side balancing fine-tuning mechanisms 5 are symmetrically arranged, and are synchronously sensed and controlled by the second handwheel mechanism 57. It can cooperate with an electronic level detection device for manual attitude control, with high flexibility, can effectively save the manual observation and operation time, and avoid the inconvenience of the control process.

[0029] A walking drive mechanism 4 for driving the overall displacement of the platform is provided on the lower side of the middle part of the U-shaped frame of the support beam frame 12. The walking drive mechanism 4 is slowly driven by a drive motor. When moving the construction position, the two groups of walking rollers 122 on both sides can be used to cooperate for displacement in the pipeline length direction. The walking drive mechanism 4 can be provided with counterweights. The movable ladder 6 is used to be placed on the side of the thin steel plate platform 1, and is mainly used for temporarily going up and down the platform.

[0030] During actual construction, the thin steel plate platform 1, including its support beam frame 12, can be welded together on-site. Then, each pre-customized functional module is positioned and welded in place on the corresponding position of the support beam frame 12. After assembly, construction workers can climb onto the thin steel plate platform 1 through the movable ladder 6. The first handwheel mechanism 21 and the second handwheel mechanism 57 provided on the upper surface of the thin steel plate platform 1 can respectively achieve positioning and locking in the working state and balance adjustment before the static state. In addition, the thin steel plate platform 1 is also provided with an electric button for controlling the walking drive mechanism 4. The construction worker controls the electric button to make the platform move a distance unit along the length direction of the pipeline. During the walking process, the first handwheel mechanism 21 is directly manually controlled to retract the push rods 24 on both sides, thereby driving the floating gate 312 to disengage from the inner wall of the pipeline. During this process, the walking drive mechanism 4 at the bottom and the walking rollers 122 on both sides are in contact with the inner wall of the pipeline. After reaching the next construction joint treatment position, first, with the assistance of the electronic level detection device, the second handwheel mechanism 57 is controlled to adjust the balance of the thin steel plate platform 1 to ensure the level of the working position. The construction worker can also control the thin steel plate platform 1 to tilt at a certain angle according to the construction requirements. When the specified attitude is reached, the first handwheel mechanism 21 is controlled again to extend the push rods 24, thereby driving the floating gate 312 to quickly press against the inner wall of the pipeline, thus forming auxiliary support forces on both sides of the platform and playing a role in locking and strengthening in the working state. At this time, the construction worker can carry out the joint treatment work at this position until the construction of this working position is completed. Then, the above process is repeated to enter the next construction position.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A large-caliber PCCP pipeline internal seam treatment construction platform, characterized by: It includes a thin steel plate platform, a telescopic drive mechanism, a pressing and locking mechanism, a walking drive mechanism, a balance fine-tuning mechanism and a movable ladder. The thin steel plate platform includes a peripheral railing and a support beam frame fixedly connected at the bottom. The upper part of the support beam frame is trapezoidal. The upper left and right sides of the support beam frame are rotatably hinged with walking rollers for contacting the inner wall of the PCCP pipeline. The lower part of the support beam frame is fixedly connected with a U-shaped frame body. The telescopic drive mechanism is installed at the center of the thin steel plate platform. The left and right sides of the bottom of the thin steel plate platform are installed through the support beam frame. A pressing and locking mechanism, the telescopic driving mechanism includes a push rod that moves horizontally at the output end, the left and right sides of the telescopic driving mechanism are connected to the corresponding pressing and locking mechanisms through the push rod driving, the left and right sides of the U-shaped frame of the supporting beam are installed with a balancing fine-tuning mechanism, and the lower middle side of the U-shaped frame of the supporting beam is provided with a walking driving mechanism for driving the overall displacement of the platform, the balancing fine-tuning mechanism is used to perform a balance state fine-tuning process on the left and right sides after the thin steel plate platform is displaced, and the movable ladder is used to be placed on the side of the thin steel plate platform.

2. A large-caliber PCCP pipeline internal seam treatment construction platform according to claim 1, characterized in that: The telescopic driving mechanism includes a first handwheel mechanism, a box body, a first worm gear assembly and a push rod. The first handwheel mechanism is rotatably installed in the middle of the thin steel plate platform. The bottom of the first handwheel mechanism passes through the thin steel plate platform and is connected to a bevel gear transmission assembly. The first worm gear assembly is drivingly connected to the bevel gear transmission assembly. A center drive sleeve is installed through the middle of the first worm gear assembly. Push rods are installed on the left and right sides of the box body, and the center drive sleeve is drivingly connected to the push rods.

3. A large-caliber PCCP pipeline internal seam treatment construction platform according to claim 2, characterized in that: The bevel gear transmission assembly includes an upper bevel gear body and a lower bevel gear body. A fixed cross bar is provided on the upper part of the box body. The upper bevel gear body is horizontally connected to the bottom end of the first hand wheel mechanism, and the lower bevel gear body is vertically rotatably installed on the fixed cross bar. The first worm gear assembly includes an upper worm body, and the lower bevel gear body is coaxially fixedly connected to the worm body.

4. A large-caliber PCCP pipeline internal seam treatment construction platform according to claim 2, characterized in that: A driving thread is provided on the inner side of the central driving sleeve, a side sleeve is embedded in the box body, a push rod is slidably inserted in the side sleeve, a rotation limit groove is provided on the outer side of the push rod, and a limit protrusion corresponding to the limit groove is provided on the side sleeve. A spiral head is provided on the outer end of the push rod, and the spiral head is screwed together with the central driving sleeve.

5. A large-diameter PCCP pipeline internal seam treatment construction platform according to claim 1, characterized in that: The pressing locking mechanism includes a deflection fork rod, and connecting blocks are provided on the left and right sides of the U-shaped frame of the supporting beam frame. A fork head is provided at the top of the deflection fork rod, and the fork head is rotatably connected to the connecting block. The connecting block is provided with a transverse hole, and the end of the push rod passes through the transverse hole and is rotatably connected to a driving connecting rod, and the bottom end of the driving connecting rod is hinged to the middle part of the deflection fork rod.

6. A large-caliber PCCP pipeline internal seam treatment construction platform according to claim 5, characterized in that: A floating gate plate is hinged at the bottom end of the deflection fork rod. The cross section of the floating gate plate is arc-shaped. A rubber pad is arranged on the bottom surface of the floating gate plate.

7. A large-caliber PCCP pipeline internal seam treatment construction platform according to claim 1, characterized in that: The balance fine-tuning mechanism includes a floating vertical rod, a reduction motor mechanism, a second worm gear mechanism and a second handwheel mechanism. The floating vertical rod is slidably inserted at the bottom of the U-shaped frame of the supporting beam. The second worm gear mechanism is fixedly attached to the outer side of the lower part of the floating vertical rod. The second worm gear mechanism is driven by the reduction motor mechanism. The second handwheel mechanism is fixedly installed on the upper part of the thin steel plate platform. The second handwheel mechanism includes a stepping control device for controlling the reduction motor mechanism.

8. A large-diameter PCCP pipeline internal seam treatment construction platform according to claim 7, characterized in that: A connecting top plate is fixedly installed on the top of the floating vertical rod, and the connecting top plate is connected to the upper side of the bottom of the U-shaped frame of the supporting beam frame through a tension spring to form a floating constraint.

9. A large-diameter PCCP pipeline internal seam treatment construction platform according to claim 7, characterized in that: The worm wheel of the second worm gear mechanism is connected to a chain transmission assembly, and a friction rubber wheel for contacting the inner wall of the pipe is installed at the bottom end of the floating vertical rod. The chain transmission assembly includes an upper chain plate, a lower chain plate and a chain, and the upper chain plate and the lower chain plate are coaxially connected to the worm wheel of the second worm gear mechanism and the friction rubber wheel in sequence.

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