A narrow space vertical pipe installation device

Abstract

The application discloses a kind of narrow space vertical pipeline mounting device, it is related to building pipe body welding technical field, including crane, inner load mechanism, top bracing mechanism and bottom support, crane is equipped with transverse moving pair and longitudinal moving pair, crane is equipped with sling cable;Inner load mechanism includes at least two inner carriers, all inner carriers are vertically linearly connected to form inner load mechanism, the top end of inner load mechanism is detachably connected with the free end of sling cable, inner load mechanism is used to be arranged in the pipe body to be hoisted, the length of inner load mechanism is longer than the pipe body to be hoisted;Top bracing mechanism includes multiple top bracing cylinders, top bracing cylinder is one-to-one corresponding with inner carrier, and is sleeved on the outer corresponding inner carrier, top bracing cylinder can expand radially outward, to extrude the inner wall of pipe body to be hoisted;Bottom support is detachably connected with the bottom end of inner load mechanism, the size of bottom support is greater than the inner diameter of pipe body to be hoisted.It can solve the problem that pipe body to be welded cannot effectively guarantee vertical state and cannot effectively center with upper pipe body when pipe body is segmented and welded.

Description

Technical Field

[0001] This invention relates to the field of building pipe welding technology, specifically to a vertical pipe installation device in a narrow space. Background Technology

[0002] In the design of water supply and drainage, heating, ventilation and air conditioning and process piping for industrial and civil building projects, in order to minimize the occupation of the main space of the building, vertical pipes leading to the upper floors are usually installed in the corners of the walls or in pipe shafts. They are extremely long and generally have large diameters, so they are usually connected and assembled by segmented welding.

[0003] When welding in sections, the following problems are commonly encountered: (1) Since the total length of the pipes to be built is generally long, multiple pipe sections need to be built. However, whether it is welding from top to bottom or welding from bottom to top, it is not easy to implement effectively in actual operation. (2) Regardless of whether the welding is done from top to bottom or from bottom to top, the pipe to be welded needs to be hoisted to the welding height by a crane. However, the existing lifting equipment cannot effectively fix the pipe to be welded, nor can it ensure that the pipe to be welded is in a vertical position, which leads to difficulties in centering and welding. (3) When aligning the two sections of the pipe body to be welded, the entire process relies on manual judgment and adjustment, resulting in generally unsatisfactory coaxiality and segment-by-segment docking errors, which leads to generally large coaxiality errors in the entire pipe body after welding. (4) Due to the narrow space in the corner or pipe well, the back of the pipe is in a blind spot and the operating space is limited, so it is impossible to weld directly on the back side of the pipe. The existing technology usually adopts the "open window" welding process, that is, cut a "window"-shaped opening in the operable part of the pipe (usually the top or side), and insert the welding tool into the pipe through the opening. Then, weld the joint of the two pipe sections from the inner wall of the pipe to complete the welding of the weld that cannot be welded from the outside of the back side (such as the back side, narrow space weld). This welding method requires high skill from the operator and is restricted by the properties of the steel. It is easy to produce defects such as insufficient weld leg and incomplete penetration due to the limited movement of the bar and the inconvenience of observing the molten pool. Similarly, the operation of the back side protection of the pipe body is also difficult and is prone to quality hazards. (5) After welding is completed, the skylight cover plate needs to be re-welded to restore the structural integrity, but “opening the skylight” and re-welding will inevitably affect the overall quality of the pipeline. Therefore, this application is hereby submitted. Summary of the Invention

[0004] The purpose of this invention is to provide a vertical pipe installation device in a narrow space, which solves the problems of hoisting difficulties, centering difficulties and back-side welding difficulties encountered when welding pipe sections in a narrow space.

[0005] This invention is achieved through the following technical solution: A vertical pipe installation device in a narrow space includes: a crane located at the top of a building for raising and lowering a lifting cable; a lifting device comprising at least two inner carriers, all of which are vertically connected, the top end of which is connected to the lifting cable; the lifting device being inserted into a pipe to be welded and having a length longer than the pipe to be welded; a detachable bottom support member at the bottom end of the lifting device, the size of which is larger than the inner diameter of the pipe to be welded; and a top support cylinder surrounding the inner carriers, the top support cylinder being capable of radially expanding outward to compress the inner wall of the pipe to be welded. The support mechanism includes a support platform and a flange. The support platform is located on the top of the building and directly below the crane. The support platform has a vertically penetrating pipe hole. The flange is coaxially located above the pipe hole and is used to coaxially fix and connect with the end face of the first section of pipe to be welded, so that the first section of pipe to be welded is coaxially and vertically inserted through the pipe hole. The rotating mechanism is located on the support platform. The flange is connected to the support platform through the rotating mechanism and can rotate the flange along an axis.

[0006] In another preferred embodiment, the rotating mechanism includes a support ring, multiple pad pillars, and a rotating motor; all the pad pillars are arranged coaxially and evenly around the pipe hole on the support platform, and the top ends of the pad pillars are at the same height; the bottom surface of the support ring is coaxially provided with an annular groove, the support ring is horizontally placed on top of all the pad pillars, and the top ends of the pad pillars are slidably embedded in the annular groove; a toothed ring is coaxially fixedly fitted on the outside of the support ring, the toothed ring meshes with the rotating motor, and the rotating motor is located on the support platform; the flange is coaxially placed on top of the support ring.

[0007] In another preferred embodiment, the pad column includes an outer cylinder and a pad block; the outer cylinder is vertically disposed on the support platform and closed at the bottom; the pad block slides vertically through the outer cylinder, and a spring is sandwiched between the pad block and the bottom wall of the outer cylinder. When the spring is in its natural state, the pad block extends from the top of the outer cylinder; the top of the pad block has a ball groove, and multiple balls are rolled along the groove wall. A ball is disposed inside the ball groove, and the ball wall abuts against all the balls. The top of the ball extends out of the ball groove.

[0008] In another preferred embodiment, the inner carrier is cylindrical, and all the inner carriers are coaxially spaced and connected; one end of each inner carrier is coaxially provided with a telescopic column, and the other end is coaxially provided with a cylindrical hydraulic cylinder, the hydraulic cylinder enabling the telescopic column to extend and retract axially, the diameters of the telescopic column and the hydraulic cylinder are both smaller than the minimum inner diameter of the top support cylinder; the top support cylinder includes multiple top support plates, all of which are arranged in a ring around the inner carrier; the inner walls of each top support plate are respectively hinged with a positioning rod and a support rod, the end of the positioning rod away from the top support plate is hinged to the side wall of the inner carrier, and the end of the support rod away from the top support plate is hinged to the side wall of the telescopic column; the axis of the inner carrier is located in the plane where the positioning rod and the support rod corresponding to each top support plate are located; the outer wall of the top support plate is covered with an elastic friction layer.

[0009] In another preferred embodiment, a suspension rod is coaxially and continuously provided on the inner carrier. The two ends of the suspension rod are respectively connected to the corresponding telescopic column and the hydraulic cylinder, and the suspension rod is fixedly connected to the telescopic column. Both ends of the suspension rod are threaded externally and detachably screwed with lifting rings. A connecting cable is provided between the lifting rings on the corresponding sides of the two suspension rods of two adjacent inner carriers. The two ends of the connecting cable are detachably hung on the two lifting rings by two hooks. The bottom end of the lowermost suspension rod is connected to the bottom support and screwed with a locking end. The uppermost lifting ring is detachably hung on the suspension cable by a hook.

[0010] In another preferred embodiment, a guide cap is coaxially threaded to the bottom end of the boom, the bottom surface of the guide cap being conical, and the maximum diameter of the guide cap being larger than the diameter of the inner carrier, the top support cylinder, the telescopic column, and the hydraulic cylinder; the bottom surface of the bottom support is conical, and the bottom end of the bottom support abuts against the locking end; a guide cover is coaxially and detachably provided at the top end of the lifting device, the guide cover comprising a cylindrical part, a conical part, and a cylindrical tube part coaxially connected in sequence, the inner diameter of the cylindrical part being equal to the outer diameter of the tube body to be welded. The inner diameter of the cylindrical section is the same as the diameter of the lifting cable; the side wall of the guide cover has a cover groove along the generatrix, the cover groove extends through the guide cover along the length direction and through the guide cover along the thickness direction, and the width of the cover groove is the same as the diameter of the lifting cable; the guide cover is coaxially sleeved with the lifting cable through the cover groove; when the cylindrical section faces downward, the cylindrical section is coaxially covered outside the top support cylinder; the lifting cable is coaxially fitted with a ball-head hollow positioning pin, the ball-head hollow positioning pin is used to axially position the guide cover.

[0011] In another preferred embodiment, multiple sets of limiting mechanisms are further included. Each limiting mechanism includes a support plate, a limiting ring, and multiple limiting supports. The support plate is horizontally positioned and its periphery is fixedly connected to the external environment. A limiting hole is formed through the center of the support plate along its thickness direction, and the diameter of the limiting hole is larger than the outer diameter of the pipe to be welded. The limiting ring is coaxially disposed on the top surface of the support plate, and its inner diameter is larger than the outer diameter of the pipe to be welded, while its outer diameter is larger than the diameter of the limiting hole. A limiting ring groove is coaxially formed on the top surface of the limiting ring. The limiting supports are used for fixed connection with the sidewall of the pipe to be welded. A limiting slider is provided at the bottom of the limiting support, and all the limiting sliders are located on the same circular line. The limiting sliders are embedded in the limiting ring groove and slide in cooperation with the limiting ring groove.

[0012] In another preferred embodiment, the limiting support includes a mounting base and a support column; the mounting base is provided with an arc plate, the side of the arc plate away from the mounting base being a cylindrical surface with the same curvature as the side wall of the pipe to be welded, the mounting base being fixedly connected to the side wall of the pipe to be welded through the arc plate, and all the mounting bases being arranged in a ring-shaped uniform interval around the pipe to be welded; the support column is vertically arranged on the corresponding mounting base, the bottom ends of all the support columns are located on the same horizontal plane, and the limiting slider is located at the bottom end of the support column.

[0013] In another preferred embodiment, the support column is detachably connected to the corresponding mounting base.

[0014] In another preferred embodiment, the support column is an elastic column.

[0015] The present invention, by adopting the above-mentioned technical solution, has the following positive effects compared with the prior art: This invention discloses a vertical pipe installation device in a narrow space. It utilizes a crane and lifting cable, with the crane driving the cable to raise and lower, providing a basic lifting and lowering mechanism. A lifting device is used, comprising at least two vertically connected inner carriers, with their tops connected to the lifting cable, allowing it to be vertically inserted into the pipe to be welded from top to bottom. A detachable bottom support is installed at the bottom of the lifting device. When the lifting device is lowered directly above the pipe to be welded, the bottom support is removed, the inner carriers are placed into the pipe, and the bottom support is reinstalled. This provides structural support to the bottom of the pipe. Furthermore, a top support is provided. The top support cylinder is designed to expand radially outward. After the lifting cable is reinstalled on the bottom support, the cylinder is controlled to expand radially outward evenly until it abuts and presses against the inner wall of the pipe to be welded, thus ensuring the pipe to be welded is coaxial with the top support cylinder and guaranteeing the verticality of the pipe during hoisting. By setting up a support mechanism, after hoisting the first section of the pipe to be welded to parallel with the flange using a lifting device, the top end of the first section is coaxially welded and fixed to the flange, allowing the first section to be welded vertically through the pipe hole and supported by the support platform. At this point, the top support cylinder is fully retracted, and the lifting device is lowered again. The above operation is repeated to weld the second section of the pipe to be welded. The pipe body is fixed and lifted until the second section of the pipe to be welded is located near the bottom of the first section. Since the length of the lifting device is longer than the length of the pipe to be welded, and the bottom of the second section abuts against the bottom support, the upper part of the lifting device will be outside the second section. At this point, the top support cylinder corresponding to the portion outside the second section is retracted, and then lifting continues until this portion of the lifting device is inserted into the bottom end of the first section until the second section reaches the welding height. At this point, the top support cylinder is expanded to make the first and second sections coaxial, thus enabling the welding of the front surfaces of both sections. Welding is then performed. After the front weld is completed, a rotating mechanism is set up to rotate the flange along the axis, which drives the first and second sections of the pipe body to be welded to rotate synchronously. This allows the welds on the sides and back sides of both sections to be turned to the front, effectively optimizing the welding environment, avoiding the narrow welding environment on the back side, and eliminating the need for "opening a window" operation. This effectively ensures the welding effect and the structural performance of the pipe body after welding. Through the cooperation of the above features, this narrow space vertical pipe installation device can effectively solve the problems of hoisting difficulties, centering difficulties, and back side welding difficulties faced when welding pipe sections in narrow spaces. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 A schematic diagram of a vertical pipe installation device in a narrow space provided by the present invention; Figure 2 A schematic diagram of the support mechanism for a vertical pipe installation device in a narrow space provided by the present invention; Figure 3 A cross-sectional schematic diagram of a support column for a vertical pipe installation device in a narrow space provided by the present invention; Figure 4 A bottom view of the support ring of a vertical pipe installation device in a narrow space provided by the present invention; Figure 5 A schematic diagram of the support ring, flange, and first section of pipe to be welded after connection in a vertical pipe installation device in a narrow space provided by the present invention. Figure 6 A schematic diagram of a lifting device for installing vertical pipes in narrow spaces, provided by the present invention; Figure 7 A schematic diagram of the uppermost part of the lifting device for a vertical pipe installation device in a narrow space provided by the present invention; Figure 8 for Figure 7 Exploded view; Figure 9 for Figure 8 A magnified view of a portion of the image; Figure 10 A schematic diagram of a guide cap for a vertical pipe installation device in a narrow space provided by the present invention; Figure 11 A schematic diagram of the lowermost part of the lifting device for a vertical pipe installation device in a narrow space, provided by the present invention; Figure 12 for Figure 11 Exploded view; Figure 13 A bottom view of the bottom support component of the lifting device for a vertical pipe installation device in a narrow space provided by the present invention; Figure 14 A schematic diagram of the lifting device for a vertical pipe installation device in a narrow space provided by the present invention in the lifting state; Figure 15 A schematic diagram of the lifting device for installing a vertical pipe in a narrow space provided by the present invention in the lowered state; Figure 16 A schematic diagram of the lifting device for vertical pipe installation in a narrow space according to the present invention during pipe body docking; Figure 17 A schematic diagram of a limiting mechanism for a vertical pipe installation device in a narrow space provided by the present invention; Figure 18 A schematic diagram of a limiting ring for a vertical pipe installation device in a narrow space provided by the present invention; Figure 19A schematic diagram of the mounting base of a limiting support for a vertical pipe installation device in a narrow space, provided by the present invention; Figure 20 This is a half-sectional view of the support column of the limiting support of a vertical pipe installation device in a narrow space provided by the present invention.

[0017] The attached diagram shows the markings and corresponding component names: 1- Crane; 2- Lifting cable; 10-Support platform; 11-Pipe hole; 12-Platform; 13-Support leg; 14-Mounting hole; 20-Flange; 201-First fixing hole; 30-Support ring; 301-Ring groove; 302-Second fixing hole; 303-Half ring; 304-Gear ring; 305-Rotating motor; 306-Output gear; 31-Push post; 311-Ball groove; 312-Rolling ball; 313-Rolling ball; 314-Outer cylinder; 3141-Support edge; 315-Push block; 316-Spring; 317-Adjusting plug; 318-Adjusting rod; 319-Lever arm; 40-Support plate; 41-Limiting hole; 42-Limiting ring; 421-Limiting ring groove; 43-Limiting support; 431-Mounting base; 432-Support column; 4321-Support cylinder; 4322-Support block; 43221-Locking rod; 4323-Supporting spring; 4324-Slide groove; 4325-Locking groove; 4326-Second adjusting plug; 4327-Second adjusting rod; 4328-Second lever arm; 4329-Second rolling ball; 433-Clamping hole; 434-Clamping groove; 435-Clamping shoulder; 436-Clamping block; 437-Clamping edge; 438-Arc plate; 439-Mounting groove; 44-Limiting slider; 50-Inner carrier; 501-Telescopic column; 502-Hydraulic cylinder; 503-Slip ring; 504-Second connecting plate; 51-Top support cylinder; 511-Elastic friction layer; 52-Top support plate; 53-Positioning rod; 54-Support rod; 55-Limiting rod; 56-Lifting rod; 561-Lifting ring; 562-Connecting cable; 563-Locking end; 564-First connecting plate; 565-Limiting nut; 57-Guide cap; 60-Bottom support; 61-Guide cover; 611-Cylindrical part; 612-Conical part; 613-Circular tube part; 614-Cover groove; 62-Ball-head hollow positioning pin. Detailed Implementation

[0018] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "lateral", and "vertical" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention.

[0020] It should be noted that the terms "horizontal" and "vertical" in this invention are used to describe approximate positional relationships, and not strictly "horizontal plane" or "vertical plane". Example

[0021] Please refer to Figures 1 to 20 As shown, this embodiment provides a vertical pipe installation device in a narrow space, including: a crane 1, a lifting device, a support mechanism, and a rotating mechanism. The crane 1 is located at the top of the building and is used to raise and lower the lifting cable 2. The lifting device includes at least two inner carriers 50, all of which are vertically connected. The top of the lifting device is connected to the lifting cable 2. The lifting device is used to pass through the pipe to be welded and is longer than the pipe to be welded. The bottom end of the lifting device is detachably provided with a bottom support member 60, the size of which is larger than the inner diameter of the pipe to be welded. The inner carriers 50 are covered with a top support cylinder 51, which can expand radially outward. The inner wall of the pipe to be welded is compressed; the support mechanism includes a support platform 10 and a flange 20. The support platform 10 is located on the top of the building and directly below the crane 1. The support platform 10 has a pipe hole 11 extending vertically through it. The flange 20 is coaxially located above the pipe hole 11. The flange 20 is used to be coaxially and fixedly connected to the end face of the first section of the pipe to be welded, so that the first section of the pipe to be welded is coaxially and vertically inserted through the pipe hole 11. The rotating mechanism is located on the support platform 10. The flange 20 is connected to the support platform 10 through the rotating mechanism. The rotating mechanism enables the flange 20 to rotate along the axis.

[0022] This embodiment discloses a vertical pipe installation device for narrow spaces. It utilizes a crane 1 and a lifting cable 2. The crane 1 drives the lifting cable 2 to raise and lower, providing a basic lifting and lowering mechanism. A lifting device is provided, comprising at least two vertically connected inner carriers 50, with their tops connected to the lifting cable 2, allowing it to be vertically inserted into the pipe to be welded from top to bottom. A detachable bottom support 60 is installed at the bottom of the lifting device. When the lifting device is lowered directly above the pipe to be welded, the bottom support 60 is removed, the inner carriers 50 are placed into the pipe, and the bottom support 60 is reinstalled. The bottom support 60 provides structural support to the bottom of the pipe to be welded. By setting up a top support cylinder 51 that can expand radially outward, and reinstalling the lifting cable 2 on the bottom support 60, the top support cylinder 51 is controlled to expand radially outward evenly until it abuts and presses against the inner wall of the pipe to be welded, thus ensuring that the pipe to be welded is coaxial with the top support cylinder 51 and guaranteeing the verticality of the pipe to be welded during hoisting. By setting up a support mechanism, after hoisting the first section of the pipe to be welded to be parallel with the flange 20 using a lifting device, the top end of the first section of the pipe to be welded is coaxially welded and fixed to the flange 20, allowing the first section of the pipe to be welded to be vertically inserted into the pipe hole 11 and supported by the support platform. At this time, the top support cylinder 51 is retracted completely, and the lifting device is lowered again. Repeat the above operation to fix and lift the second section of the pipe to be welded until it is located near the bottom of the first section. Since the length of the lifting device is longer than the length of the pipe to be welded, and the bottom of the second section is in contact with the bottom support 60, the upper part of the lifting device will be outside the second section of the pipe. At this point, retract the top support cylinder 51 corresponding to the part outside the second section of the pipe, and then continue lifting so that this part of the lifting device passes into the bottom end of the first section of the pipe until the second section of the pipe reaches the welding height. At this point, control the expansion of the top support cylinder 51 to make the first and second sections of the pipe coaxial, thus enabling welding. Welding is performed on the front side of both sections. After the front side weld is completed, a rotating mechanism is set up to rotate the flange 20 along the axis, which drives the first and second sections of the pipe body to be welded to rotate synchronously. This allows the side and back side welds to be turned to the front, effectively optimizing the welding environment, avoiding the narrow welding environment on the back side, and eliminating the need for "opening a window" operation. This effectively ensures the welding effect and the structural performance of the pipe body after welding. Through the cooperation of the above features, this narrow space vertical pipe installation device can effectively solve the problems of hoisting difficulties, centering difficulties, and back side welding difficulties faced when welding pipe sections in narrow spaces.

[0023] It should be noted that the aforementioned top support cylinder 51 can adopt any circumferential expansion mechanism in the prior art, such as an annular inflation mechanism, cylinder push plate mechanism, etc., as long as it can expand uniformly outward along the radial direction in the circumferential direction, and always maintain a cylindrical or quasi-cylindrical shape with the same axis during the expansion process, with only the outer diameter gradually increasing.

[0024] To further explain the specific structure of the rotating mechanism, the rotating mechanism includes a support ring 30, multiple pads 31, and a rotating motor 305; all the pads 31 are arranged in a ring-shaped, coaxial, and evenly spaced arrangement around the pipe hole 11 on the support platform 10, and the top ends of the pads 31 are at the same height; the bottom surface of the support ring 30 is coaxially provided with an annular groove 301, and the support ring 30 is horizontally placed on top of all the pads 31, with the top ends of the pads 31 slidably embedded in the annular groove 301; a toothed ring 304 is coaxially fixedly fitted on the outside of the support ring 30, and the toothed ring 304 meshes with the rotating motor 305, which is located on the support platform 10; the flange 20 is coaxially placed on top of the support ring 30.

[0025] With the above configuration, the support ring 30 is supported by multiple pads 31. The sliding fit between the top of the pad 31 and the ring groove 301 allows the support ring 30 to rotate around its own axis on the annular dot matrix formed by all the pads 31. At the same time, the embedded fit between the ring groove 301 and the top of the pad 31 can radially limit the support ring 30, preventing it from shifting radially or falling off the dot matrix of pads 31 during rotation. Based on this, by rotating the motor 305 to drive the toothed ring 304 to rotate, the support ring 30 can be driven to rotate, which in turn drives the flange 20 that overlaps with it to rotate, thereby driving the pipe body to be welded, which is fixedly connected to the flange 20, to rotate.

[0026] It should be noted that the output shaft of the rotating motor 305 passes through the platform 12 in the vertical direction and is equipped with an output gear 306, which meshes with the gear ring 304.

[0027] It should be noted that the aforementioned rotating motor 305 can be a standalone motor, or a motor with its own gearbox, a motor with its own control system, etc., as long as it can drive the support ring 30 to rotate.

[0028] To further improve the fit between the support ring 30 and the pad 31, and to further ensure the verticality of the first section of the pipe to be welded, the pad 31 includes an outer cylinder 314 and a pad block 315. The outer cylinder 314 is vertically arranged on the support platform 10 and its bottom end is closed. The pad block 315 slides through the outer cylinder 314 in the vertical direction. A spring 316 is sandwiched between the pad block 315 and the bottom wall of the outer cylinder 314. When the spring 316 is in its natural state, the pad block 315 extends from the top of the outer cylinder 314. The top of the pad block 315 has a ball groove 311. Multiple balls 313 are rolled on the groove wall of the ball groove 311. A ball 312 is arranged in the ball groove 311. The ball wall of the ball 312 abuts against all the balls 313. The top of the ball 312 extends out of the ball groove 311.

[0029] Through the above configuration, utilizing the sliding fit between the outer cylinder 314 and the pad 315, and the elastic support of the spring 316, the height of the top of the pad column 31 can be elastically changed under the action of the spring 316. On the one hand, this avoids the unavoidable production and installation tolerances among all the pad columns 31, allowing the support ring 30 to smoothly contact all the pad columns 31. On the other hand, when there is a slight angular deviation between the flange 20 and the first section of the pipe body to be welded (it is difficult to ensure that the two are perfectly perpendicular during actual installation), since the self-weight of the pipe body to be welded is much greater than the self-weight of the flange 20, the pipe body to be welded will automatically become vertical under its own weight, and at this time, the slight angular deviation of the flange 20 can be eliminated. The elastic deformation of the elastic pad 31 is used to compensate for the vertical deformation, ensuring that the pipe to be welded remains vertical for subsequent alignment and welding. By setting up the rolling ball 312 and the ball 313, the ball groove 311 limits the rolling ball 312, allowing the rolling ball 312 to roll within the ball groove 311 while only its top protrudes. Thus, the rolling ball 312 replaces the top of the pad 31 in sliding engagement with the annular groove 301, and the rolling of the rolling ball 312 improves the smoothness. Furthermore, the ball 313 replaces the groove wall of the ball groove 311 in contact with the ball wall of the rolling ball 312, thereby further reducing the contact area between the two, and at the same time, the rolling of the ball 313 further improves the rolling smoothness of the rolling ball 312.

[0030] It should be noted that the center angle of the ball groove 311 is greater than 180°, so that the rolling ball 312 is stuck in the ball groove 311 and will not come out of the ball groove 311.

[0031] To further explain the specific structure of the support platform 10, the support platform 10 includes a platform 12 and multiple support legs 13; the platform 12 is horizontally arranged, the pipe hole 11 is opened in the middle of the platform 12 and passes through the platform 12 in the vertical direction, the platform 12 has multiple mounting holes 14 evenly spaced in a ring around the pipe hole 11, the mounting holes 14 pass through the platform 12 in the vertical direction; the support legs 13 are vertically arranged on the bottom surface of the platform 12, and the bottom end of the support legs 13 is fixedly connected to the top of the building; the side wall of the pad column 31 extends outward to form a support edge 3141, the size of the support edge 3141 is larger than the diameter of the mounting hole 14, the pad column 31 corresponds one-to-one with the mounting hole 14 and passes through the corresponding mounting hole 14, the support edge 3141 is attached to the top surface of the platform 12 and is fixed by bolts.

[0032] Through the above-mentioned arrangement, the longitudinal dimension of the support platform 10 is effectively reduced, making it less likely for the pipe inserted into the pipe hole 11 to come into contact with the hole wall of the pipe hole 11, thereby avoiding unnecessary friction. Furthermore, by setting the support leg 13, the platform 12 is supported, thereby forming a receiving space under the platform 12 to facilitate the subsequent longitudinal installation of various mechanisms and components on the platform 12. By opening the mounting hole 14 in the platform 12, the pad 31 can be longitudinally inserted into the platform 12 through the mounting hole 14. By forming a support edge 3141 protruding from the side wall of the pad 31, the pad 31 is hung in the mounting hole 14 using the support edge 3141, and fixedly connected to the platform 12 by bolts through the support edge 3141. This effectively reduces the longitudinal length of the part of the pad 31 located above the platform 12, preventing it from bending and deforming under pressure.

[0033] To allow for coarse adjustment of the top height of the pad 31 to accommodate supporting columns of different weights, an adjusting plug 317 is slidably disposed inside the outer cylinder 314 along the vertical direction. An adjusting rod 318 is rotatably connected to the bottom end of the adjusting plug 317. The bottom end of the adjusting rod 318 passes through the bottom wall of the outer cylinder 314 and is threaded. A lever arm 319 is provided at the bottom end of the adjusting rod 318. A spring 316 is sandwiched between the pad 315 and the adjusting plug 317.

[0034] With the above settings, by rotating the adjusting rod 318 using the lever arm 319, the adjusting rod 318 can be threaded into the outer cylinder 314, so that the adjusting rod 318 can move up and down along the axial direction, thereby driving the adjusting plug 317 to rise and fall, and thus indirectly causing the pad block 315 to rise and fall through the spring 316.

[0035] In order to stably fix the flange 20 to the support ring 30, the flange 20 is provided with a plurality of first fixing holes 201 through the thickness direction; the support ring 30 is provided with a plurality of second fixing holes 302 through the thickness direction, the second fixing holes 302 correspond one-to-one with the first fixing holes 201, and are connected by bolts.

[0036] It should be noted that, for ease of preparation and processing, the support ring 30 includes two semi-rings 303, which are detachably connected, and the central angle of the two semi-rings 303 is 180°.

[0037] To further explain the shape and structure of the inner carrier 50 and the top support cylinder 51, the inner carrier 50 is cylindrical, and all the inner carriers 50 are coaxially spaced and connected; one end of each inner carrier 50 is coaxially provided with a telescopic column 501, and the other end is coaxially provided with a cylindrical hydraulic cylinder 502. The hydraulic cylinder 502 can cause the telescopic column 501 to extend and retract axially. The diameters of both the telescopic column 501 and the hydraulic cylinder 502 are smaller than the minimum inner diameter of the top support cylinder 51; the top support cylinder 51 includes multiple top support plates 52, all of which are... The top support plate 52 is arranged in a ring around the inner carrier 50; the inner wall of the top support plate 52 is respectively hinged with a positioning rod 53 and a support rod 54, the end of the positioning rod 53 away from the top support plate 52 is hinged to the side wall of the inner carrier 50, and the end of the support rod 54 away from the top support plate 52 is hinged to the side wall of the telescopic column 501; the axis of the inner carrier 50 is located in the plane where the positioning rod 53 and the support rod 54 are located for each top support plate 52; the outer wall of the top support plate 52 is covered with an elastic friction layer 511.

[0038] With the above configuration, the hydraulic cylinder 502 drives the telescopic column 501 to extend and retract. The extension and retraction of the telescopic column 501 causes one end of the support rod 54, which is hinged to it, to move. While the lengths of the support rod 54 and the positioning rod 53 remain constant, the top support plate 52, which is hinged to both, can be moved inward or outward, and all the top support plates 52 move synchronously. This changes the outer diameter of the top support cylinder 51 formed by the top support plates 52. When the telescopic column 501 extends away from the inner carrier 50, the positioning rod 53 and the support rod 54... The angle between them gradually increases, and the top support plate 52 retracts inward until the side walls of the adjacent top support plates 52 abut against each other. At this time, it is the minimum outer diameter of the top support cylinder 51. At this time, all the top support plates 52 are spliced ​​into a complete cylinder. When the telescopic column 501 retracts in the direction close to the inner carrier 50, the angle between the positioning rod 53 and the support rod 54 gradually decreases, and the top support plate 52 expands outward. At this time, the outer diameter of the top support cylinder 51 gradually increases, and the top support cylinder 51 gradually expands until the top support plate 52 abuts against and is squeezed against the inner side wall of the pipe to be hoisted.

[0039] It should be noted that the driving structure of the hydraulic cylinder 502 and the telescopic column 501 can be implemented using any of the existing technologies, as long as it can drive the telescopic column 501 to extend and retract.

[0040] To limit the maximum outward expansion of the top support plate 52 and prevent excessive contraction of the telescopic column 501 from causing damage to related structures, the telescopic column 501 is coaxially slidably fitted with a slip ring 503. A limit rod 55 is hinged to the inner wall of the top support plate 52. The end of the limit rod 55 away from the top support plate 52 is hinged to the slip ring 503. The limit rod 55 is coplanar with the corresponding positioning rod 53 and the support rod 54.

[0041] By setting up a slip ring 503 and a limiting rod 55, when the top support plate 52 is opened, since the length of the limiting rod 55 remains constant, it is also pulled outward by the top support plate 52, thereby applying a tensile force extending along the length direction of the limiting rod 55 to the slip ring 503. This tensile force can be decomposed into a horizontal outward tensile force and a vertical tensile force. The vertical tensile force will pull the slip ring 503 to slide directionally along the telescopic column 501. When the limiting rod 55 rotates to the horizontal, the vertical tensile force component is 0. At this time, the slip ring 503 will no longer slide along the telescopic column 501. This is the maximum outer diameter of the top support cylinder 51. Generally speaking, in actual use, the top support cylinder 51 will not expand to the maximum outer diameter, so the slip ring 503 will not be structurally locked.

[0042] To further explain the connection structure between the inner carrier 50 and the suspension cable 2, and the connection structure between the inner carriers 50, a suspension rod 56 is coaxially and continuously provided on the inner carrier 50. The two ends of the suspension rod 56 are respectively connected to the corresponding telescopic column 501 and the hydraulic cylinder 502, and the suspension rod 56 is fixedly connected to the telescopic column 501. Both ends of the suspension rod 56 are threaded externally and detachably screwed with a lifting ring 561. A connecting cable 562 is provided between the lifting rings 561 on the corresponding sides of the two suspension rods 56 of two adjacent inner carriers 50. The two ends of the connecting cable 562 are detachably hung on the two lifting rings 561 by two hooks. The bottom end of the lowermost suspension rod 56 is connected to the bottom support 60 and screwed with a locking end 563. The uppermost lifting ring 561 is detachably hung on the suspension cable 2 by a hook.

[0043] With the above configuration, the boom 56 is used as the connecting body, and an external thread is opened at its end and a lifting ring 561 is screwed on it so that the lifting cable 2 with the hook can be directly hung on the lifting ring 561 to form a stable and detachable connection. The two adjacent inner carrier sections 50 are also connected by the boom 56. The booms 56 of the two are connected by the connecting cable 562 with the hook. This connection method makes the tension completely concentrated on the lifting cable 2, the boom 56 and the connecting cable 562, so as not to affect the structural performance of the inner carrier 50, nor to affect the support and contraction of the top support cylinder 51.

[0044] To further explain the specific connection structure between the boom 56 and the inner carrier 50, the boom 56 is coaxially fixedly connected to a first connecting plate 564, and the end of the telescopic column 501 away from the inner carrier 50 is coaxially fixedly connected to a second connecting plate 504. The first connecting plate 564 and the second connecting plate 504 are fixedly connected by bolts. The boom 56 is coaxially slidably engaged with the inner carrier 50 and the hydraulic cylinder 502. A limit nut 565 is screwed onto the end of the boom 56 that is slidably engaged with the hydraulic cylinder 502. When the top support cylinder 51 is retracted to its minimum, the hydraulic cylinder 502 abuts against the limit nut 565.

[0045] By setting the first connecting plate 564 and the second connecting plate 504, the boom 56 is fixedly connected to the telescopic column 501. When the telescopic column 501 extends or retracts, since it is relatively fixed to the boom 56, it will drive the inner carrier 50 and the hydraulic cylinder 502 to slide along the boom 56 in the opposite direction. By setting the limit nut 565, the extreme position of the hydraulic cylinder 502 is limited to prevent the hydraulic cylinder 502 from moving too far away from the telescopic column 501.

[0046] To prevent unnecessary obstruction between the inner carrier 50 and hydraulic cylinder 502 and the floor slab or other external environment during the lowering process, which could lead to lowering failure, a guide cap 57 is coaxially threaded onto the bottom end of the lifting rod 56. The bottom surface of the guide cap 57 is conical, and the maximum diameter of the guide cap 57 is larger than the diameters of the inner carrier 50, the top support cylinder 51, the telescopic column 501, and the hydraulic cylinder 502. The bottom surface of the bottom support member 60 is conical, and the bottom end of the bottom support member 60 abuts against the locking end 563. A guide cover 61 is coaxially and detachably installed at the top of the lifting device. The guide cover 61 includes a cylindrical part 611, a conical part 612, and a cylindrical tube part 613 coaxially connected in sequence. The inner diameter of the cylindrical part 611 is the same as the outer diameter of the pipe body to be welded, and the inner diameter of the cylindrical part 613 is the same as the diameter of the lifting cable 2; the side wall of the guide cover 61 has a cover groove 614 along the generatrix, the cover groove 614 penetrates the guide cover 61 along the length direction and the thickness direction, and the width of the cover groove 614 is the same as the diameter of the lifting cable 2; the guide cover 61 is coaxially sleeved with the lifting cable 2 through the cover groove 614; when the cylindrical part 611 is facing downward, the cylindrical part 611 is coaxially covered outside the top support cylinder 51; the lifting cable 2 is coaxially fitted with a ball-head hollow positioning pin 62, which is used to axially position the guide cover 61.

[0047] Specifically, the inner diameter of the hollow ball-head positioning pin 62 is adapted to the outer diameter of the suspension cable 2, the outer diameter of the hollow ball-head positioning pin 62 is adapted to the inner diameter of the circular tube 613, the width of the cover groove 614 is adapted to the diameter of the suspension cable 2 and is not greater than the inner diameter of the hollow ball-head positioning pin 62; the ball head of the hollow ball-head positioning pin 62 is pre-inserted into the suspension cable 2 with the ball head facing upward.

[0048] By setting a guide cap 57, a conical structure is formed below the inner carrier 50. When lowered, it can be lowered smoothly when it comes into contact with the external environment (mainly the pipe hole wall where the pipe body is installed), avoiding jamming. In order to prevent the bottom support 60 from obstructing the external environment when lowered, the bottom surface of the bottom support 60 is also set as a conical surface. By setting a guide cover 61, it can be detachably connected. When lowering, the guide cover 61 is set in the order of cylindrical part 611, conical part 612, and cylindrical part 613 from top to bottom. During the lowering process, the conical part 612 can act as a conical guide. The guide cover 61 serves to avoid environmental obstruction. During hoisting, the guide cover 61 is reversed and the cylindrical part 611 is coaxially fitted onto the top support cylinder 51 that is exposed at the top of the pipe body to be hoisted. This protects the exposed part while the conical part 612 provides conical guidance to avoid environmental obstruction. By opening the cover groove 614, it can be quickly installed and disassembled. The ball-head hollow positioning pin 62 plays a limiting role. That is, the weight of the ball-head hollow positioning pin 62 applies axial pressure to the installed guide cover 61 to compress it and maintain its installed posture.

[0049] It should be noted that the lifting ring 561, which is screwed to one end of the boom 56 and the guide cap 57, is located inside the guide cap 57. The tip of the guide cap 57 has a through hole coaxially so that the connecting cable 562 and the hook can be inserted into the guide cap 57.

[0050] By setting the guide cap 57 to be hollow and the hook located inside the guide cap 57, the hook is prevented from being knocked off during the lowering process.

[0051] Please refer to Figures 17 to 20To further improve the posture stability of the pipe body to be welded during the welding process, the aforementioned vertical pipe installation device in narrow spaces also includes multiple sets of limiting mechanisms. Each limiting mechanism includes a support plate 40, a limiting ring 42, and multiple limiting supports 43. The support plate 40 is horizontally positioned and its periphery is fixedly connected to the external environment. A limiting hole 41 is formed through the center of the support plate 40 along its thickness direction, and the diameter of the limiting hole 41 is larger than the outer diameter of the pipe body to be welded. The limiting ring 42 is coaxially mounted on the support plate 40. On the top surface of the support plate 40, the inner diameter of the limiting ring 42 is larger than the outer diameter of the pipe body to be welded, and the outer diameter is larger than the diameter of the limiting hole 41. The top surface of the limiting ring 42 has a coaxial limiting ring groove 421. The limiting support 43 is used to fix it to the side wall of the pipe body to be welded. The bottom of the limiting support 43 is provided with a limiting slider 44. All the limiting sliders 44 are located on the same circular line. The limiting sliders 44 are embedded in the limiting ring groove 421 and slide in cooperation with the limiting ring groove 421.

[0052] By setting a support plate 40 and opening a limiting hole 41 through its center along the thickness direction, structural support and limiting foundation are provided for the pipe body to be welded (the pipe body located below). On this basis, by setting a limiting ring 42, the strength of the part of the support plate 40 located around the limiting hole 41 is further strengthened, and the inner diameter of the limiting ring 42 is used to further limit the radial movement of the pipe body to be welded. By opening a limiting ring groove 421 coaxially on the top surface of the limiting ring 42, and setting multiple limiting supports 43 on this basis, the limiting supports 43 are fixed to the side wall of the pipe body to be welded. A fixed connection is established, and a limiting slider 44 is provided at the bottom of the limiting support 43. The limiting slider 44 is embedded and slides in the limiting ring groove 421, thereby using the limiting ring 42 to provide vertical structural support for the limiting support 43, indirectly providing axial support for the pipe body to be welded. The limiting ring groove 421 is used to radially limit the limiting support 43, so that the limiting slider 44 can only slide along the limiting ring groove 421, allowing it to rotate stably without shaking, swinging, or deviating, thus effectively ensuring the welding conditions and welding effect.

[0053] To further explain the specific structure of the limiting support 43, the limiting support 43 includes a mounting base 431 and a support column 432; the mounting base 431 is provided with an arc plate 438, the side of the arc plate 438 away from the mounting base 431 is a cylindrical surface with the same curvature as the side wall of the pipe to be welded, the mounting base 431 is fixedly connected to the side wall of the pipe to be welded through the arc plate 438, and all the mounting bases 431 are arranged in a ring-shaped uniform interval around the pipe to be welded; the support column 432 is vertically arranged on the corresponding mounting base 431, the bottom ends of all the support columns 432 are located on the same horizontal plane, and the limiting slider 44 is located at the bottom end of the support column 432.

[0054] With the above settings, the mounting base 431 is fixedly connected to the side wall of the pipe to be welded, for example by welding or bolting, so that the entire limiting support 43 is stably fixed to the side wall of the pipe to be welded; by setting the support column 432, it is set on the corresponding mounting base 431, and the limiting slider 44 is set at the bottom end of the support column 432. The vertically set support column 432 slides with the limiting ring groove 421 to avoid structural bending or deformation caused by force deviation.

[0055] To avoid the need to replace the mounting base 431 simultaneously when the support column 432 is damaged (the mounting base 431 is fixedly connected to the pipe body to be welded (usually by welding)), the support column 432 and the corresponding mounting base 431 are detachably connected.

[0056] Specifically, the mounting base 431 has a mounting groove 439, and the bottom of the mounting groove 439 has a vertically penetrating locking hole 433; the support column 432 is vertically embedded and fixedly connected in the mounting groove 439, and the bottom end of the support column 432 passes through the locking hole 433 so that the bottom end of the support column 432 is located outside the mounting groove 439.

[0057] With the above-mentioned configuration, the support column 432 can be detachably snapped into the mounting groove 439, so that the bottom end of the support column 432 passes through the locking hole 433. When the support column 432 is damaged or needs to be replaced for other reasons, it can be easily replaced, thereby avoiding the separation of the mounting base 431 from the pipe body to be welded. Only the support column 432 needs to be replaced. It can also further improve the alignment between the mounting base 431 and the support column 432, so as to minimize the unnecessary plastic deformation caused by the horizontal component force causing the mounting base 431 and the support column 432 to pull against each other.

[0058] To further improve the matching degree between the support column 432 and the mounting base 431, a slot 434 is vertically opened through the top of the groove of the mounting base 431. The slot 434 extends radially outward through the top wall of the mounting groove 439. A locking block 436 protrudes from the top of the support column 432. The size of the locking block 436 is the same as the width of the slot 434.

[0059] By using the above settings, the engagement of the locking block 436 and the locking slot 434 improves the matching degree of the connection between the support column 432 and the mounting base 431, and prevents the support column 432 from shaking in the mounting slot 439.

[0060] To further limit the axial position of the top of the support column 432, the width of the slot 434 is smaller than the width of the top of the mounting slot 439, so that shoulders 435 are formed on both sides of the slot 434 in the width direction; the upper sidewall of the support column 432 extends outward to form a pair of retaining edges 437, the retaining edges 437 and the retaining shoulders 435 correspond one-to-one, the retaining edges 437 are attached to the bottom surface of the corresponding retaining shoulders 435, and are fixedly connected by bolts.

[0061] With the above settings, under the premise that the card block 436 and the card slot 434 are engaged, the support column 432 is further axially limited by the contact between the card edge 437 and the card shoulder 435 to prevent it from axially shaking.

[0062] To avoid structural damage caused by rigid supports, the support column 432 is an elastic column.

[0063] Specifically, the support column 432 includes a support cylinder 4321 and a support block 4322; the top of the support cylinder 4321 is closed, the retaining edge 437 is provided on the upper outer side wall of the support cylinder 4321, and the retaining block 436 is provided on the top of the support cylinder 4321; the support block 4322 slides vertically through the support cylinder 4321, and a support spring 4323 is sandwiched between the support block 4322 and the top wall of the support cylinder 4321. When the support spring 4323 is in its natural state, the support block 4322 extends from the bottom end of the support cylinder 4321; the support cylinder 4321 is embedded in the mounting groove 439; the support block 4322 slides through the retaining hole 433; and the limiting slider 44 is provided at the bottom end of the support block 4322.

[0064] Through the above settings, the support column 432 has axial elasticity. On the one hand, the axial support is elastic, avoiding structural damage caused by hard-hard contact of rigid support. On the other hand, under the self-weight of the pipe to be welded, it can automatically be vertical. At this time, the axial elasticity of the support column 432 can compensate for the slight deviation between the bottom heights caused by the installation deviation of all support columns 432.

[0065] To facilitate the detachable connection between the support column 432 and the mounting base 431, the lower side wall of the support cylinder 4321 has a vertically oriented sliding groove 4324 and a horizontally oriented locking groove 4325. One end of the locking groove 4325 communicates with the top of the sliding groove 4324. Both the sliding groove 4324 and the locking groove 4325 are arranged to extend through the thickness direction of the side wall of the support cylinder 4321. The side wall of the support block 4322 is provided with a locking rod 43221, which slides in cooperation with the sliding groove 4324 and the locking groove 4325. When the locking rod 43221 is located in the locking groove 4325, the support block 4322 is completely located inside the support cylinder 4321.

[0066] With the above settings, when installation or disassembly is required, external force is used to slide the locking rod 43221 along the slide groove 4324 to the locking groove 4325, and then slide along the locking groove 4325 and axially limit it, so that the support block 4322 can be completely inserted into the support cylinder 4321, thereby unlocking the locking between the support block 4322 and the locking hole 433, so that the support column 432 can be taken out from the mounting groove 439.

[0067] In order to allow the bottom height of the support column 432 to be coarsely adjusted, a second adjusting plug 4326 is slidably provided in the support cylinder 4321 along the vertical direction. The top end of the second adjusting plug 4326 is rotatably connected to a second adjusting rod 4327. The top end of the second adjusting rod 4327 passes through the top wall of the support cylinder 4321 and is threaded. The top end of the second adjusting rod 4327 is provided with a second lever arm 4328.

[0068] With the above configuration, by rotating the second adjusting rod 4327 using the second lever arm 4328, the second adjusting rod 4327 can be threaded into the support cylinder 4321, so that the second adjusting rod 4327 can move up and down along the axial direction, thereby driving the second adjusting plug 4326 to rise and fall, thereby indirectly causing the support block 4322 to rise and fall through the support spring 4323.

[0069] In order to improve the smoothness of the sliding cooperation between the limiting slider 44 and the limiting ring groove 421, a second rolling ball 4329 is provided at the bottom end of the limiting slider 44.

[0070] The above description is merely a preferred embodiment of the present invention and does not limit the implementation and protection scope of the present invention. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A vertical pipe installation device in a narrow space, characterized in that, include: Crane (1), which is located on the top of the building, is used to raise and lower the hoisting cable (2); The lifting device includes at least two inner carriers (50), all of which are vertically connected. The top of the lifting device is connected to the lifting cable (2). The lifting device is used to pass through the pipe to be welded and is longer than the pipe to be welded. The bottom end of the lifting device is detachably provided with a bottom support (60), the size of which is larger than the inner diameter of the pipe to be welded. The inner carriers (50) are covered with a top support cylinder (51), which can expand radially outward to compress the inner wall of the pipe to be welded. The support mechanism includes a support platform (10) and a flange (20). The support platform (10) is located on the top of the building and directly below the crane (1). The support platform (10) has a pipe hole (11) extending vertically through it. The flange (20) is coaxially located above the pipe hole (11). The flange (20) is used to be coaxially fixedly connected to the end face of the first section of the pipe body to be welded, so that the first section of the pipe body to be welded is coaxially and vertically inserted through the pipe hole (11). A rotating mechanism is provided on the support platform (10). The flange (20) is connected to the support platform (10) through the rotating mechanism. The rotating mechanism enables the flange (20) to rotate along the axis.

2. The vertical pipe installation device in a narrow space according to claim 1, characterized in that, The rotating mechanism includes a support ring (30), multiple pads (31), and a rotating motor (305). All the pads (31) are arranged in a ring-shaped, coaxial, and uniformly spaced arrangement around the pipe hole (11) on the support platform (10), and the top heights of the pads (31) are the same. The bottom surface of the support ring (30) is coaxially provided with an annular groove (301). The support ring (30) is horizontally placed on the top of all the pads (31). The top of the pads (31) is slidably embedded in the annular groove (301). A toothed ring (304) is coaxially fixedly fitted on the outside of the support ring (30), and the toothed ring (304) meshes with the rotating motor (305), which is located on the support platform (10). The flange (20) is coaxially mounted on top of the support ring (30).

3. The vertical pipe installation device in a narrow space according to claim 2, characterized in that, The pad (31) includes an outer cylinder (314) and a pad block (315); The outer cylinder (314) is vertically mounted on the support platform (10) and its bottom end is closed; The pad (315) slides vertically through the outer cylinder (314), and a spring (316) is sandwiched between the pad (315) and the bottom wall of the outer cylinder (314). When the spring (316) is in its natural state, the pad (315) extends out from the top of the outer cylinder (314). The top of the pad (315) has a ball groove (311), and multiple balls (313) are rolled on the groove wall of the ball groove (311). A ball (312) is arranged in the ball groove (311), and the ball wall of the ball (312) abuts against all the balls (313). The top of the ball (312) extends out of the ball groove (311).

4. The vertical pipe installation device in a narrow space according to claim 1, characterized in that, The inner carrier (50) is cylindrical, and all the inner carriers (50) are coaxially spaced and connected. One end of the inner carrier (50) is coaxially provided with a telescopic column (501), and the other end is coaxially provided with a cylindrical hydraulic cylinder (502). The hydraulic cylinder (502) can make the telescopic column (501) extend and retract axially. The diameters of the telescopic column (501) and the hydraulic cylinder (502) are both smaller than the minimum inner diameter of the top support cylinder (51). The top support cylinder (51) includes multiple top support plates (52), and all the top support plates (52) are arranged in a ring around the inner carrier (50); The inner wall of the top support plate (52) is respectively hinged with a positioning rod (53) and a support rod (54). The end of the positioning rod (53) away from the top support plate (52) is hinged to the side wall of the inner carrier (50), and the end of the support rod (54) away from the top support plate (52) is hinged to the side wall of the telescopic column (501). The axis of the inner carrier (50) is located in the plane of the positioning rod (53) and the support rod (54) corresponding to each of the top support plates (52); The outer wall of the top support plate (52) is covered with an elastic friction layer (511).

5. The vertical pipe installation device in a narrow space according to claim 4, characterized in that, The inner carrier (50) is coaxially provided with a suspension rod (56), and the two ends of the suspension rod (56) are respectively connected to the corresponding telescopic column (501) and the hydraulic cylinder (502). The suspension rod (56) is fixedly connected to the telescopic column (501). Both ends of the boom (56) are threaded externally and can be detachably screwed with lifting rings (561). A connecting cable (562) is provided between the corresponding rings (561) on the corresponding sides of the two hanging rods (56) of the two adjacent inner carriers (50). The two ends of the connecting cable (562) are detachably hung on the two hanging rings (561) by two hooks respectively. The bottom end of the lowest rod (56) passes through the bottom support (60) and is screwed with a locking end (563). The uppermost lifting ring (561) is detachably attached to the lifting cable (2) via a hook.

6. The vertical pipe installation device in a narrow space according to claim 5, characterized in that, The bottom end of the boom (56) is coaxially threaded with a guide cap (57). The bottom surface of the guide cap (57) is conical. The maximum diameter of the guide cap (57) is greater than the diameter of the inner carrier (50), the top support cylinder (51), the telescopic column (501), and the hydraulic cylinder (502). The bottom surface of the bottom support (60) is conical, and the bottom end of the bottom support (60) abuts against the locking end (563); The top of the lifting device is coaxially and detachably provided with a guide cover (61). The guide cover (61) includes a cylindrical part (611), a conical part (612), and a circular tube part (613) connected coaxially in sequence. The inner diameter of the cylindrical part (611) is the same as the outer diameter of the pipe body to be welded, and the inner diameter of the circular tube part (613) is the same as the diameter of the lifting cable (2). The side wall of the guide cover (61) has a cover groove (614) along the busbar. The cover groove (614) penetrates the guide cover (61) along the length direction and also penetrates the guide cover (61) along the thickness direction. The width of the cover groove (614) is the same as the diameter of the suspension cable (2). The guide cover (61) is coaxially sleeved with the suspension cable (2) through the cover groove (614); When the cylindrical part (611) faces downward, the cylindrical part (611) is coaxially covered outside the top support cylinder (51); The hoisting cable (2) is coaxially fitted with a hollow ball-head positioning pin (62), which is used to axially position the guide cover (61).

7. The vertical pipe installation device in a narrow space according to claim 1, characterized in that, It also includes multiple sets of limiting mechanisms, which include a support plate (40), a limiting ring (42) and multiple limiting supports (43). The support plate (40) is horizontally set and its periphery is fixedly connected to the external environment. A limiting hole (41) is opened through the middle of the support plate (40) along the thickness direction. The diameter of the limiting hole (41) is larger than the outer diameter of the pipe body to be welded. The limiting ring (42) is coaxially disposed on the top surface of the support plate (40). The inner diameter of the limiting ring (42) is larger than the outer diameter of the pipe to be welded, and the outer diameter is larger than the diameter of the limiting hole (41). The top surface of the limiting ring (42) is coaxially opened with a limiting ring groove (421). The limiting support (43) is used to fix the pipe body to be welded. The bottom of the limiting support (43) is provided with a limiting slider (44). All the limiting sliders (44) are located on the same circle. The limiting sliders (44) are embedded in the limiting ring groove (421) and slide with the limiting ring groove (421).

8. The vertical pipe installation device in a narrow space according to claim 7, characterized in that, The limiting support (43) includes a mounting base (431) and a support column (432); The mounting base (431) is provided with an arc plate (438). The side of the arc plate (438) away from the mounting base (431) is a cylindrical surface with the same curvature as the side wall of the pipe to be welded. The mounting base (431) is fixedly connected to the side wall of the pipe to be welded through the arc plate (438). All the mounting bases (431) are arranged in a ring-shaped uniform interval around the pipe to be welded. The support column (432) is vertically mounted on the corresponding mounting base (431), and the bottom ends of all the support columns (432) are located on the same horizontal plane. The limiting slider (44) is located at the bottom end of the support column (432).

9. The vertical pipe installation device in a narrow space according to claim 8, characterized in that, The support column (432) is detachably connected to the corresponding mounting base (431).

10. The vertical pipe installation device in a narrow space according to claim 9, characterized in that, The support column (432) is an elastic column.

Images