Multifunctional installation construction platform for pressure steel pipe

Abstract

The present application relates to the field of water conservancy and hydropower engineering, and particularly relates to a multifunctional installation construction platform for pressure steel pipe, comprising: a locking device, a supporting mechanism is telescopic along the radial direction of a supporting body, the end of the supporting mechanism can be inserted into the inner side annular weld between the butt-jointed pressure steel pipes, and the construction platform is fixed to the pipe opening of the steel pipe; a pressure joint device, a pressure joint support rod is connected to the supporting body through telescopic support, the pressure joint support rod is provided with an upper roller and a lower roller, the upper roller and the lower roller are coaxially arranged and independent of each other, and the axial direction of the upper roller and the lower roller is parallel to the axial direction of the supporting body; a lifting device, which can drive the construction platform to move upward; a work platform, which can be used for pressure joint, locking and welding of the pressure steel pipe. Through the construction platform, the jointing and welding work can be efficiently and safely completed by the construction personnel in the steel pipe, the construction quality and efficiency are improved, and the construction cost and safety risk are reduced.

Description

Technical Field

[0001] This invention relates to the field of water conservancy and hydropower engineering construction, and in particular to a multi-functional installation and construction platform for pressure steel pipes. Background Technology

[0002] In water conservancy and hydropower projects, pressure steel pipes are the core component of the water conveyance system, undertaking the task of transporting high-pressure water. The construction quality of these pipes directly affects the safety and operational efficiency of the power station. However, traditional vertical shaft pressure steel pipe construction faces many challenges, such as high risks associated with working at heights, low construction efficiency, and difficulty in guaranteeing welding quality.

[0003] To address the aforementioned issues, patent application CN218135842U discloses an integrated construction platform suitable for the installation of large-diameter pressure steel pipes. The platform includes a construction platform installed inside the steel pipe, with its length along the axial direction of the pipe and exceeding the length of a standard pipe section. The platform has a welding area at one end and an assembly area at the other. A support device is fixedly connected to the end of the assembly area, and a telescopic device is fixedly connected to the side of the support device away from the construction platform. The telescopic end of the telescopic device is fixedly connected to the assembly device. Walking devices are provided on both sides of the bottom of the construction platform. This integrates welding personnel and equipment, as well as assembly personnel's equipment, onto a single platform, thus integrating the various processes of steel pipe installation. Patent application CN118933794A discloses an automated operation platform and method for installing large-diameter high-strength steel pipes in deep vertical shafts. The platform includes a first support beam and a second support beam arranged parallel to each other. A pressing operation is fixedly connected to the top of the first support beam. A hydraulic cylinder support rod is rotatably connected to the center of the pressing operation plate through a rotating mechanism. First hydraulic cylinders are provided at both ends of the hydraulic cylinder support rod. A hoisting component is connected to the top of the rotating mechanism through a chain electric hoist. A welding operation plate is fixedly connected to the top surface of the second support beam. A sliding track is arranged circumferentially around the center of the welding operation plate. A welding operation chamber is slidably connected to the sliding track through a traveling mechanism. A limit adjustment mechanism is provided at the bottom of each end of the first and second support beams.

[0004] However, current pressure steel pipe construction platforms, when fixing the platform to the pipe opening using hooks or clamps, occupy the opening space. When the next section of steel pipe to be installed is positioned and connected, the fixing hooks or clamps must be detached before the two sections can be joined. This technique requires connecting lifting ropes, raising the locking beam, and then retracting the locking claws before each connection to avoid interference with the connection process. This procedure is cumbersome and cannot allow for vertical lifting and adjustment of the steel pipe. After the pipes are joined, unevenness at the opening makes local fine-tuning difficult using lifting points. Fixing the platform to the inner wall of the steel pipe via temporary welding or clamping requires significant manual labor, involves frequent high-altitude work, and poses high safety risks.

[0005] Furthermore, current pressure steel pipe construction platforms using traditional jacks for circumferential joint pressing of pipe sections suffer from numerous adjustments, inaccurate precision, and slippage issues. This necessitates multiple manual operations to complete the final rounding, resulting in extremely low work efficiency and high construction safety risks. Using a star-shaped support for rounding lacks guiding and docking functions, making guidance and positioning difficult. Moreover, once the hydraulic support is tightly pressed against the inner wall of the steel pipe, the high friction prevents rotational adjustment. Given the large diameter of the steel pipe sections, the ends cannot be guaranteed to be perfectly circular, and adjacent pipe sections have varying diameters within the tolerance range. Consequently, the pressing support cannot be positioned at equal points on the circumference of adjacent pipe sections, potentially leading to excessive local deformation at the pipe ends and inaccurate docking. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a multi-functional installation and construction platform for pressure steel pipes.

[0007] A multi-functional installation and construction platform for pressure steel pipes, comprising: The locking device includes a support mechanism and a telescopic mechanism. Multiple support mechanisms are evenly distributed around the outer periphery of the support body. The telescopic mechanism is used to drive the support mechanisms to extend and retract radially along the support body. The end of the support mechanism can extend into the inner circumferential weld between two sections of pressure steel pipe and fix the construction platform to the pipe opening. A seam-pressing device includes telescopic supports and seam-pressing struts. Multiple telescopic supports are evenly distributed along the outer periphery of the support body. The seam-pressing struts are connected to the support body through the telescopic supports. The telescopic supports are used to drive the seam-pressing struts to extend and retract radially along the support body. The seam-pressing struts are provided with upper rollers and lower rollers. The upper rollers and lower rollers are coaxially arranged and independent of each other. The axial directions of the upper rollers and lower rollers are parallel to the axial direction of the support body. The lifting device can drive the construction platform to move upward; The work platform can be used for crimping, locking, and welding of pressure steel pipes.

[0008] Preferably, the work platform includes an upper work platform, a lower work platform, and a movable work platform.

[0009] Preferably, the end section of the support mechanism is wedge-shaped, with an upper inclined surface on top and a lower flat surface on the bottom.

[0010] Preferably, the number of support mechanisms is at least three.

[0011] Preferably, the locking device further includes a support rail for limiting the extension and retraction direction of the retractable mechanism.

[0012] Preferably, the seam support rod is provided with a rolling cavity, and the upper roller and the lower roller are respectively rolled in the rolling cavity, with the upper roller and the lower roller protruding from the side of the seam support rod away from the supporting body.

[0013] Preferably, the pressure strut is provided with a guide slope on the side away from the support body, and the guide slope is located above the upper roller.

[0014] Preferably, the retractable support is equipped with a sensor that collects the retractable support's expansion and contraction dimension data to guide the adjustment of the retractable support's circular dimension.

[0015] Preferably, the lifting device includes a self-climbing device, which includes a lifting cable and a fixed pulley, and the self-climbing device can drive the construction platform to climb upward.

[0016] Preferably, the fixed pulley is fixed to the outer periphery of the support body, and the lifting cable is connected to a power device.

[0017] Preferably, the construction platform is used for inclined shaft or vertical shaft construction.

[0018] Preferably, the work platform can be used for weld inspection, grinding, and corrosion protection operations during the installation of pressure steel pipes. Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a multi-functional installation platform for pressure steel pipes. Through the cooperation of a locking device and a lifting device, the platform can be stably locked and lifted. The rollers of the seam pressing device allow the steel pipe to be installed to rotate slightly around the axis during seam pressing, which is more conducive to the seam alignment of the pipe ends. The platform enables construction personnel to efficiently and safely complete seam pressing and welding operations inside the pressure steel pipe. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a multi-functional installation and construction platform for pressure steel pipes according to the present invention.

[0020] Figure 2 for Figure 1 The front view.

[0021] Figure 3 for Figure 1 Top view.

[0022] Figure 4 This is a schematic diagram of the locking device, the seam pressing device, and the upper working platform described in this invention.

[0023] Figure 5 for Figure 4 Enlarged schematic diagram of part A.

[0024] Figure 6 This is a partial structural schematic diagram of a seam pressing device according to the present invention.

[0025] Figure 7 This is a structural diagram of the self-climbing device, lower working platform, and movable working platform described in this invention.

[0026] Marked in the image: 1-Locking device, 11-Supporting mechanism, 111-Upper inclined surface, 112-Lower plane, 12-Extendable mechanism, 13-Supporting guide rail, 2-Seam pressing device, 21-Extendable support, 22-Seam pressing strut, 221-Upper roller, 222-Lower roller, 223-Rolling cavity, 224-Guide slope, 3-Self-climbing device, 31-Lifting cable, 32-Fixed pulley, 33-Power unit. 4- Upper working platform, 5-Lower working platform, 6-Mobile work platform, 7-Supporting main body. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0028] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer," etc., used in the description of specific embodiments of the present invention to indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0029] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present invention.

[0030] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0031] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0032] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to connection methods commonly used in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0033] Example 1 like Figure 1-7 As shown, a multi-functional installation platform for pressure steel pipes includes: a locking device 1, a seam pressing device 2, a self-climbing device 3, a working platform, and a support body 7. The support body 7 serves as the main support structure of the entire construction platform, providing support and load-bearing functions. The support body 7 can be a columnar or barrel-shaped structure. The locking device 1, seam pressing device 2, self-climbing device 3, and working platform are all fixedly connected to the support body 7. The working platform includes an upper working platform 4, a lower working platform 5, and a movable working platform 6. The working platform can perform seam pressing, locking, welding, corrosion protection, weld inspection, and grinding operations. The locking device 1 and seam pressing device 2 are located above the upper working platform 4. The locking device 1 and seam pressing device 2 can be set at the same height or at different heights, preferably at the same height, which facilitates seam pressing and docking operations on the construction platform.

[0034] The locking device 1 includes a support mechanism 11 and a telescopic mechanism 12. Multiple support mechanisms 11 are evenly distributed outward around the support body 7. Typically, the length direction of a single support mechanism 11 can be arranged radially along the support body 7. Multiple support mechanisms 11 are arranged at intervals around the support body 7, preferably evenly spaced, that is, the circumferential angle of two adjacent support mechanisms 11 about the center of the support body 7 is equal. This is beneficial to the force and stability of the locking device 1.

[0035] The telescopic mechanism 12 is used to drive the support mechanism 11 to extend and retract radially along the support body 7. The telescopic mechanism 12 is also used to adjust the distance between the end of the support mechanism 11 and the center of the support body 7. The telescopic mechanism 12 can be a hydraulic mechanism, such as a hydraulic cylinder. The telescopic mechanism 12 can also be a jack, an electric screw, a manual screw, etc.

[0036] In a preferred embodiment, the number of the retractable mechanisms 12 is matched with the number of the support mechanisms 11. Typically, the number of the retractable mechanisms 12 and the number of the support mechanisms 11 are at least 3, preferably 3-6.

[0037] The longitudinal section of the end of the support mechanism 11 on the side away from the support body 7 is rectangular or wedge-shaped. It is sufficient that the end of the support mechanism 11 does not affect the contact between the pipe openings of the upper and lower steel pipes after it extends into the inner circumferential weld between the upper and lower steel pipes, and can ensure that it provides a stable locking force for the working platform.

[0038] In a preferred embodiment, the support mechanism 11 is a wedge-shaped support mechanism. The upper part of the end of the support mechanism 11 (the end furthest from the support body 7) is an upper inclined surface 111, and the lower part is a lower flat surface 112. The upper inclined surface 111 and the lower flat surface 112 of the support mechanism 11 can extend into the inner circumferential weld between the two sections of pressure steel pipes, thus fixing the construction platform to the pipe opening. That is, the end of the support mechanism 11 can be engaged with the circumferential weld bevel, thereby fixing the construction platform. In this case, the support mechanism 11 can serve as both a fixing structure for the pipe opening locking device and a vertical lifting and adjustment mechanism when the pipe openings are uneven.

[0039] In an optional embodiment, the inclination angle of the upper inclined surface 111 at the end of the support mechanism 11 is less than or equal to the angle of the minimum bevel of the steel pipe weld, so that the support mechanism 11 can extend into the circumferential seam for a longer length and provide better support. More preferably, the inclination angle of the upper inclined surface 111 at the end of the support mechanism 11 is less than or equal to 60°, which provides a greater vertical force and a better effect on vertically adjusting the steel pipe to be installed.

[0040] like Figure 5 As shown, when the telescopic mechanism 12 uses a hydraulic cylinder, the support body 7 is provided with a support guide rail 13 corresponding to the support mechanism 11 in the circumferential direction. The support guide rail 13 is arranged radially along the support body 7. The support mechanism 11 is slidably disposed on the support guide rail 13. The support guide rail 13 guides the support mechanism 11. The support guide rail 13 is used to limit the telescopic direction of the telescopic mechanism 12, which is beneficial for the end of the support mechanism 11 to quickly extend into or out of the annular gap. In an optional embodiment, the supporting guide rail 13 is a guide rod, and the supporting mechanism 11 is sleeved on the outside of the guide rod; In an optional embodiment, the support rail 13 is a guide sleeve, the support mechanism 11 is sleeved on the outside of the guide sleeve, and the guide sleeve is sleeved on the outside of the support mechanism 11.

[0041] The two methods described above, through the sleeved arrangement, can better restrict the support mechanism 11 and improve the support capacity when the steel pipes are joined. Furthermore, the telescopic mechanism 12 can be installed inside or outside the guide sleeve via a hinged connection.

[0042] Furthermore, the cross-sections of the guide rod, the guide sleeve, and the support mechanism 11 are all square or rectangular to prevent the support mechanism 11 from rotating and reduce the possibility of the support mechanism 11 swaying along its axis, thereby improving the support capacity when the steel pipes are joined.

[0043] The locking device 1 utilizes the space within the circumferential bevel of the steel pipe opening. The support mechanism 11 can extend into the circumferential bevel to lock the locking device 1 in place. This serves as an additional fixing device for the construction platform without affecting the alignment of the two pipe sections. The process is simple and requires no multiple adjustments. The extension and retraction of the support mechanism 11 also allows for localized vertical height adjustments of the steel pipe, facilitating fine-tuning of the flatness during pipe joint connection. Furthermore, the device eliminates the need for welding, reducing manual labor intensity and the impact of welding on the pipe wall.

[0044] like Figure 5 As shown, the seam pressing device 2 includes a telescopic support 21 and a seam pressing strut 22. Multiple telescopic supports 21 are evenly distributed outward around the support body 7. Typically, the length direction of a single telescopic support 21 can be arranged radially along the support body. Multiple telescopic supports 21 are arranged at intervals around the support body 7, preferably evenly spaced, that is, the circumferential angles of two adjacent telescopic supports 21 about the center of the support body 7 are equal. This helps to improve the seam pressing effect of the seam pressing device 2.

[0045] The seam-pressing strut 22 is located at the end of the telescopic support 21 away from the support body 7, meaning the seam-pressing strut 22 is connected to the support body 7 via the telescopic support 21. The telescopic support 21 is used to drive the seam-pressing strut 22 to extend and retract radially along the support body 7. Preferably, the seam-pressing strut 22 is located at the end of the telescopic support 21, and the axial direction of the seam-pressing strut 22 is parallel to the axial direction of the support body 7. The seam-pressing strut 22 is provided with an upper roller 221 and a lower roller 222, which are coaxially arranged and independent of each other. The axial directions of the upper roller 221 and the lower roller 222 are parallel to the axial direction of the support body 7, and the upper roller 221 and the lower roller 222 are respectively used to contact different steel pipes. This allows the upper roller 221 and the lower roller 222 of the seam support rod 22 to support two adjacent steel pipe sections respectively, which is beneficial to the deformation of the adjacent ends of the two adjacent steel pipe sections, so that the equidistant points of the adjacent steel pipe sections correspond one-to-one through the seam support rod 22.

[0046] Preferred, such as Figure 6As shown, the seam support rod 22 is provided with a rolling cavity 223. The upper roller 221 and the lower roller 222 are respectively rolled within the independent rolling cavity 223. The upper roller 221 and the lower roller 222 each protrude independently from the side of the seam support rod 22 away from the supporting body 7. The rollers are set in an embedded manner, making the rotation process of the rollers more stable.

[0047] Preferably, the seam support 22 is provided with a guide slope 224 on the side away from the support body 7, and one of the guide slopes 224 is located above the upper roller 221.

[0048] Further preferably, the seam-pressing strut 22 is provided with two guide ramps 224 on the side away from the support body 7, one of which is located above the upper roller 221, and the other is located below the lower roller 222. These are used for guiding and positioning when two adjacent steel pipe sections are joined, and the guide ramps 224 also guide the installation of the steel pipe jointing seam-pressing device inside the steel pipe section, and facilitate guidance when the steel pipe section is installed outside the steel pipe jointing seam-pressing device. Vertical guidance is achieved, making installation more convenient and faster.

[0049] In a preferred embodiment, the number of the seam-pressing struts 22 is 4, 6, 8, 10, 12, 14, or 16. Generally, the more seam-pressing struts 22 there are, the better the seam alignment effect.

[0050] In a preferred embodiment, the retractable support 21 is hydraulically driven, applying pressure to the steel pipe through eight evenly distributed seam-pressing struts 22; the upper roller 221 and the lower roller 222 cross the weld seam and can contact the upper and lower pipe openings respectively, allowing the steel pipe to be installed to rotate slightly around the axis during seam pressing, which is more conducive to the seam pressing alignment of the pipe opening and avoids jamming; the control system can monitor the pushing stroke and pushing force data in real time, and feed back the seam pressing status of the steel pipe to the display screen according to the parameters.

[0051] In an optional embodiment, the retractable support 21 is equipped with a sensor that collects the retractable dimension data of the retractable support 21 to guide the adjustment dimension of each retractable support 21. The collected data can be used to adjust the adjustment dimension of each retractable support 21 in real time, making the adjustment dimension more accurate.

[0052] With the aforementioned seam pressing device 2, due to the multiple sets of circumferentially arranged seam pressing struts 22, auxiliary operations such as welding and pressing codes are not required when seaming two steel pipe sections together. This saves a significant amount of manual welding and cutting work, effectively reducing labor intensity and construction costs, and improving construction efficiency. Furthermore, the seam pressing struts 22 are equipped with rollers, allowing the steel pipe sections to rotate circumferentially relative to the rollers during seaming. In other words, the seam pressing device 2 has two rotational degrees of freedom relative to the two steel pipe sections that need to be seamed to form a staggered seam. The deformation of the steel pipe sections allows the support points supported by the rollers to move, thereby adjusting the position to adapt to the deformation of the steel pipe sections, making the seam pressing and rounding adjustment more accurate and avoiding local deviations due to inability to adjust. Additionally, the seam pressing struts 22 are equipped with guide slopes 224, which can serve as guide surfaces during pipe end docking, facilitating the guiding docking of the pipe ends.

[0053] This method of setting two rollers on the working surface of the seam-pressing strut 22 allows for independent rolling relative to the two adjacent steel pipe sections, as the two rollers are axially aligned and each supports one of the two adjacent steel pipe sections. Even if one roller on the seam-pressing strut 22 is pressed against the inner wall of the corresponding steel pipe section, it will not affect the adjustment of the inner wall of the other steel pipe section by the other roller. For example, during seam pressing, the other steel pipe section can still rotate circumferentially relative to the roller. That is, the deformation of the other steel pipe section causes the support point supported by the roller to move, thereby adjusting the position to match the deformation of the other steel pipe section. This makes the seam-pressing and rounding adjustment more accurate and avoids local deviations due to the inability to adjust. It allows for a wider range of adjustment and prevents the steel pipe rounding device from being unable to effectively adjust the other steel pipe section when one roller is pressed against the inner wall of the corresponding steel pipe section.

[0054] The self-climbing device 3 includes a lifting cable 31 and a fixed pulley 32. The self-climbing device 3 can drive the construction platform to climb upward. The fixed pulley 32 is fixed to the outer periphery of the support body 7. The lifting cable 31 is connected to a power device 33, which can be an electric hoist or the like.

[0055] The self-climbing device 3 is equipped with a tension sensor to collect tension data of the lifting cable 31, and the locking device 1 is equipped with a distance sensor to collect the extension and retraction stroke of the support mechanism 11. Either the tension or the stroke must exceed a certain set value before one of the devices can be disengaged. For example, the support mechanism 11 can only retract when the tension exceeds the set value, or the self-climbing device 3 can only disengage when the extension stroke of the support mechanism 11 exceeds the set value. This ensures that at least one set of devices is always operational during construction, improving safety.

[0056] As an alternative, the self-climbing device 3 can be replaced by using the main lifting point at the wellhead to lift the construction platform.

[0057] In a preferred embodiment, four sets of electric hoists are evenly distributed around and fixed to the top of the platform. Four sets of fixed pulleys 32 are installed at the bottom of the platform corresponding to the positions of the electric hoists. Lifting cables 31 are connected to the hooks of the electric hoists, passing through the fixed pulleys 32 and connecting upwards to the opening of the steel pipe to be installed via hooks. The lifting cables 31 can be made of ultra-high strength wear-resistant rope, which is lightweight, has a high load-bearing capacity, and facilitates personnel handling. Utilizing the lifting stroke of the electric hoists, the platform can self-climb along the inner wall of the steel pipe, climbing the length of one pipe section installation unit at a time.

[0058] The work platform includes an upper work platform 4, a lower work platform 5, and a movable work platform 6. The work platform can perform operations such as seam pressing, locking, welding, corrosion protection, weld inspection, and grinding.

[0059] In a preferred embodiment, the platform pedal is divided into 8 sections, with multiple sets of mounting holes reserved. The bottom of the platform has 8 sets of detachable fixed diagonal braces. The fixed diagonal braces are fixedly connected to the support body 7 by bolts or pins. The pedal is fixedly connected to the diagonal braces by bolts, forming a circular working platform.

[0060] Each platform has an access hole. A straight ladder is installed along the supporting body 7 between the upper working platform 4 and the lower working platform 5, and a protective ring is installed. A rope ladder of a specific length is installed between the lower working platform 5 and the movable working platform 6 to facilitate personnel access to different working surfaces.

[0061] 1) Upper working platform 4: The upper working platform 4 is located at the top and completes functions such as pressing seams, locking the entire multi-functional working platform, lifting cable hooks, and welding. 2) Lower working platform 5: The lower working platform 5 is located in the middle and mainly performs welding-related operations for circumferential seams. It is at a certain height difference from the upper working platform 4.

[0062] 3) Mobile working platform 6: It is fixedly connected to the support body 7 at the bottom of the lower working platform 5 by means of a construction basket. It can be moved up and down to the required height by using a hoist to facilitate the completion of anti-corrosion work, weld inspection, grinding and other operations on the inner wall.

[0063] This invention provides a multi-functional installation platform for pressure steel pipes. Through the cooperation of locking device 1 and self-climbing device 3, the platform can be stably locked and climbed. The rollers of the seam pressing device 2 allow the steel pipe to be installed to rotate slightly around the axis during seam pressing, which is more conducive to the seam alignment of the pipe ends. With three working platforms, construction personnel can efficiently and safely complete seam pressing, welding, and anti-corrosion work inside the pressure steel pipe.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-functional installation and construction platform for pressure steel pipes, characterized in that, include: The locking device (1) includes a support mechanism (11) and a telescopic mechanism (12). Multiple support mechanisms (11) are evenly distributed around the outside of the support body (7). The telescopic mechanism (12) is used to drive the support mechanism (11) to extend and retract radially along the support body (7). The end of the support mechanism (11) can extend into the inner annular weld between two sections of pressure steel pipe and fix the construction platform to the pipe opening. The seam pressing device (2) includes a telescopic support (21) and a seam pressing strut (22). Multiple telescopic supports (21) are evenly distributed around the outer periphery of the support body (7). The seam pressing strut (22) is connected to the support body (7) through the telescopic supports (21). The telescopic supports (21) are used to drive the seam pressing strut (22) to extend and retract radially along the support body (7). The seam pressing strut (22) is provided with an upper roller (221) and a lower roller (222). The upper roller (221) and the lower roller (222) are coaxially arranged and independent of each other. The axial direction of the upper roller (221) and the lower roller (222) is parallel to the axial direction of the support body (7). The lifting device can drive the construction platform to move upward; The work platform can be used for crimping, locking, and welding of pressure steel pipes.

2. The multi-functional installation and construction platform for pressure steel pipes according to claim 1, characterized in that, The end section of the support mechanism (11) is wedge-shaped, with an upper inclined surface (111) on the top and a lower flat surface (112) on the bottom.

3. The multi-functional installation and construction platform for pressure steel pipes according to claim 1, characterized in that, The number of the support mechanisms (11) is at least 3.

4. The multi-functional installation and construction platform for pressure steel pipes according to claim 1, characterized in that, The locking device (1) further includes a support rail (13) for limiting the extension and retraction direction of the telescopic mechanism (12).

5. The multi-functional installation and construction platform for pressure steel pipes according to claim 1, characterized in that, The seam support rod (22) is provided with a rolling cavity (223). The upper roller (221) and the lower roller (222) are respectively rolled in the rolling cavity (223). The upper roller (221) and the lower roller (222) protrude from the side of the seam support rod (22) away from the supporting body (7).

6. The multi-functional installation and construction platform for pressure steel pipes according to claim 5, characterized in that, The pressure strut (22) has a guide slope (224) on the side away from the support body (7), and the guide slope (224) is located above the upper roller (221).

7. The multi-functional installation and construction platform for pressure steel pipes according to claim 1, characterized in that, The retractable support (21) is equipped with a sensor that collects the retractable dimension data of the retractable support (21) to guide the adjustment of the retractable support (21) to a circular dimension.

8. The multi-functional installation and construction platform for pressure steel pipes according to claim 1, characterized in that, The lifting device includes a self-climbing device (3), which includes a lifting cable (31) and a fixed pulley (32). The self-climbing device (3) can drive the construction platform to climb upward.

9. A multi-functional installation and construction platform for pressure steel pipes according to claim 8, characterized in that, The fixed pulley (32) is fixed to the outer periphery of the support body (7), and the lifting cable (31) is connected to the power device (33).

10. A multi-functional installation and construction platform for pressure steel pipes according to any one of claims 1-9, characterized in that, The construction platform is used for inclined shaft or vertical shaft construction, or the work platform includes an upper work platform (4), a lower work platform (5) and a movable work platform (6), or the work platform can be used for weld inspection, grinding and anti-corrosion work of pressure steel pipe installation.

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