A boiler steam pipe hoisting device

Abstract

This invention provides a boiler steam pipe hoisting device, belonging to the field of pipe hoisting technology. It includes a hoisting frame, a hoisting mechanism, a first annular seat, a second annular seat, and two limiting seats. Rollers are arranged at the bottom of the hoisting frame. The hoisting mechanism is located at the top of the hoisting frame and is used to hoist the steam pipe upwards. The first and second annular seats are vertically arranged at both ends of the hoisting frame. An annular groove is formed on the side of the first annular seat facing the second annular seat. A geared disc and a rotating component for driving the geared disc are arranged on the side of the second annular seat facing the first annular seat. One limiting seat is slidably disposed within the annular groove, and the other limiting seat is fixedly disposed on the geared disc. Both limiting seats are equipped with positioning components for fixing the position of the steam pipe. This invention can conveniently hoist the bridge section of the steam pipe upwards, and after hoisting, rotate the elbow section to a specified angle and maintain the elbow section's state, thereby facilitating subsequent welding operations.

Description

Technical Field

[0001] This invention relates to the field of pipeline hoisting technology, and more specifically, to a boiler steam pipeline hoisting device. Background Technology

[0002] Boiler steam pipelines are a crucial component of thermal engineering, primarily used to transport steam and ensure the efficient transfer of heat energy generated by the boiler to where it is needed. Steam pipelines are characterized by high temperature, high pressure, and corrosion resistance; therefore, high-quality pipes and fittings are required, and they must be designed and installed strictly in accordance with relevant standards and specifications. When it is necessary to avoid buildings or other obstacles, steam pipelines need to have bridging pipes that protrude to one side to facilitate installation and obstacle crossing. Furthermore, since condensate is generated in addition to steam flow during operation, upward-protruding bridging pipes are required at regular intervals.

[0003] Crossing pipes typically consist of a straight section and elbow sections at both ends of the straight section, with the elbow sections forming an S-shape. When a steam pipe needs to cross over an obstacle, the elbow section must be vertical during hoisting; when a steam pipe needs to cross over an obstacle from the left or right side, the elbow section must be horizontal during hoisting; and in some special installation environments, the elbow section may need to be inclined.

[0004] Currently, when hoisting the bridge pipes of steam pipelines, workers usually need to install manual or electric hoists in the workshop to lift the entire bridge pipe upwards. However, when welding is required after hoisting, workers need to rotate the bridge pipe and keep the bend section at a specified angle, which is time-consuming, labor-intensive, and makes it difficult to guarantee the accuracy of the position. Summary of the Invention

[0005] The purpose of this invention is to provide a boiler steam pipe hoisting device, which can easily lift the cross-bridge pipe of the steam pipe upwards, and after hoisting, rotate the elbow section to a specified angle and maintain the state of the elbow section, thereby facilitating subsequent welding operations.

[0006] This invention is achieved through the following technical solution: a boiler steam pipe hoisting device, comprising a hoisting frame, the hoisting frame including a base frame and a top frame disposed above the base frame, the base frame being equipped with a lifting electric cylinder for driving the top frame to rise or fall, and rollers being disposed at the bottom of the base frame; a hoisting mechanism disposed at the top of the top frame, the hoisting mechanism including a hoisting beam and two winches, the wire ropes of the winches being equipped with flexible slings; and a first annular seat, the first annular seat being vertically disposed at one end of the top frame, and the side of the first annular seat facing the center position of the top frame along its length direction having an opening. The device includes: a groove; a second annular seat, which is vertically disposed at the other end of the top frame, and a rotating disk and a rotating component for driving the rotating disk to rotate are disposed on the side of the second annular seat facing the center position of the top frame along its length; two limiting seats, one of which is slidably disposed in the annular groove of the first annular seat, and the other of which is fixedly disposed on the rotating disk. The limiting seat includes an outer seat and an inner seat detachably disposed on the outer seat. The inner seat has an elbow groove adapted to the shape of the elbow section of the bridge pipe, and the outer seat is provided with a positioning component for fixing the position of the straight section of the bridge pipe.

[0007] Furthermore, the first annular seat is provided with an alignment element, which includes a mounting base, a support rod, and an alignment seat. The mounting base is fixedly disposed on the side of the first annular seat away from the second annular seat. The support rod is hinged inside the mounting base. The alignment seat is disposed at the end of the support rod away from the mounting base. The alignment seat has an arc-shaped groove adapted to the shape of the installed pipe. When the support rod is rotated to a vertical state, the arc-shaped groove is aligned with the axial direction of the first annular seat.

[0008] Furthermore, the positioning component includes an arc-shaped seat, a mounting bracket, and a connector. The inner wall shape of the arc-shaped seat is adapted to the shape of the straight section of the bridge pipe. When the bend section of the bridge pipe is fitted with the bend groove, the straight section of the bridge pipe abuts against the inner wall of the arc-shaped seat. A through groove for a flexible sling to pass through is provided in the middle of the arc-shaped seat. The mounting bracket is located at the end of the arc-shaped seat facing the outer seat and is detachably connected to the outer seat. The connector is located at the end of the arc-shaped seat away from the outer seat and can be inserted into the through groove.

[0009] Furthermore, the connector includes a connector strip and a telescopic electric cylinder. The connector strip is slidably disposed within the arc-shaped seat. The telescopic electric cylinder is embedded within the arc-shaped seat and can drive the connector strip to insert into or move out of the through slot. When the connector strip moves into the through slot, it can insert into the gap between the flexible sling and the straight section and fix the relative position of the straight section and the arc-shaped seat.

[0010] Furthermore, a touch switch for opening and closing the telescopic electric cylinder is embedded on the inner wall of the arc-shaped seat. When the straight section of the bridge pipe abuts against the inner wall of the arc-shaped seat, the touch switch can open the telescopic electric cylinder.

[0011] Furthermore, the top two sides of the outer seat are provided with first slots for inserting the mounting bracket, the mounting bracket is provided with a positioning pin, and the groove wall of the first slot is provided with a first positioning hole for inserting the positioning pin; the bottom two sides of the outer seat are provided with second slots for inserting the mounting bracket, and the groove wall of the second slot is provided with a second positioning hole for inserting the positioning pin; when the mounting bracket is inserted into the second slot, the inner wall of the arc-shaped seat is aligned with the axial direction of the arc-shaped groove on the alignment seat.

[0012] Furthermore, the first annular seat is fixedly installed at one end of the top frame, and the second annular seat is slidably installed at the other end of the top frame along the length direction of the top frame; the end of the hoisting beam away from the first annular seat has a notch along its own length direction, and a sliding base is slidably connected in the notch; one of the winches is fixedly installed at the end of the hoisting beam close to the first annular seat, and the other winch is fixedly installed on the sliding base.

[0013] Furthermore, the top frame is provided with a drive cylinder at the end away from the first annular seat for driving the second annular seat to move closer to or away from the first annular seat, and a connecting seat is provided on the top of the second annular seat, the connecting seat being fixedly connected to the sliding base.

[0014] Furthermore, the rotating component includes a support plate, a drive motor, and a gear. The support plate is fixedly mounted on the second annular seat, the drive motor is fixedly mounted on the support plate, the gear is coaxially mounted on the output shaft of the drive motor, and the rotating disk is a geared disk that meshes with the gear.

[0015] Furthermore, a limiting rod is provided on the side of the limiting seat facing the first annular seat. The limiting rod is detachably connected to the limiting seat by bolts. A limiting block is provided at the end of the limiting rod away from the first annular seat. The limiting block is slidably disposed in the annular groove. Auxiliary rods are provided on both sides of the bottom of the limiting seat. A sliding seat is also provided in the annular groove. An installation groove is opened on the sliding seat. One end of the auxiliary rod is hinged to the limiting seat, and the other end is detachably connected to the installation groove.

[0016] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0017] 1. This invention uses a hoisting mechanism to hoist the entire bridge pipeline. After hoisting to the designated position, the bend section of the bridge pipeline enters the bend groove inside the limiting seat. Then, the straight section of the bridge pipeline is fixed by the positioning component, thus fixing the relative position of the bridge pipeline and the outer seat. Then, the rotating component drives the rotating disk to rotate, which in turn drives the limiting seat connected to the rotating disk to rotate, ultimately causing the entire bridge pipeline to rotate to the designated state.

[0018] 2. The present invention aligns the axial directions of the first and second annular seats and provides an alignment member on the first annular seat, so that the arc groove on the alignment member is aligned with the axial directions of both the first and second annular seats. This ensures that during the rotation of the rotating disk on the second annular seat, the end of the elbow section of the bridge pipe always maintains the axial direction aligned with the installed pipe, thereby facilitating the subsequent welding process.

[0019] 3. The present invention drives the second annular seat to move along the length of the lifting frame by driving the electric cylinder, so as to change the distance between the second annular seat and the first annular seat, thus making it suitable for bridge pipes with different lengths of straight sections; when the second annular seat moves, it drives the sliding base to move synchronously through the connecting seat, so that the lifting mechanism installed on the sliding base moves, and the moving distance is consistent with the moving distance of the second annular seat. Attached Figure Description

[0020] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the present invention will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the overall structure of the boiler steam pipe hoisting device provided by the present invention;

[0022] Figure 2 This is a schematic diagram of the hoisting mechanism, the first annular seat, the second annular seat, the limiting seat, and the positioning assembly of the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of the limiting seat of the present invention on the second annular seat;

[0024] Figure 4 This is a schematic diagram of the alignment member of the present invention on the first annular seat;

[0025] Figure 5 This is a schematic diagram of the structure of the limiting seat of the present invention on the first annular seat;

[0026] Figure 6This is a schematic diagram of the positioning component and the limiting seat of the present invention;

[0027] Figure 7 This is a schematic diagram of the positioning component and flexible sling of the present invention;

[0028] Icons: 1-Lifting frame, 11-Base frame, 111-Roller, 12-Top frame, 13-Lifting cylinder, 2-Lifting mechanism, 21-Lifting beam, 211-Notch, 212-Sliding base, 22-Winch, 23-Wire rope, 24-Flexible sling, 3-First annular seat, 31-Annular groove, 4-Second annular seat, 41-Rotating disk, 42-Rotating component, 421-Support plate, 422-Drive motor, 423-Gear, 43-Drive cylinder, 44-Connecting seat, 5-Limiting seat, 51-Outer seat, 511-First slot, 512-First positioning hole, 513- Second slot, 514-Second positioning hole, 52-Inner seat, 521-Elbow groove, 53-Limit rod, 531-Limit block, 54-Auxiliary rod, 55-Sliding seat, 551-Mounting groove, 6-Positioning component, 61-Arc seat, 611-Through groove, 62-Mounting bracket, 621-Positioning pin, 63-Plug-in component, 631-Plug-in strip, 632-Telescopic electric cylinder, 633-Touch switch, 7-Alignment component, 71-Mounting seat, 72-Support rod, 73-Alignment seat, 731-Arc groove, 8-Installed pipe, 9-Bridge pipe, 91-Elbow section, 92-Straight section. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] Example 1

[0032] The following is for reference Figures 1-7 As shown in the figure, and further illustrated with specific embodiments, the present invention is a boiler steam pipe hoisting device, referring to... Figure 1 , Figure 2As shown, the system includes a lifting frame 1, a lifting mechanism 2, a first annular seat 3, a second annular seat 4, and two limiting seats 5. The lifting frame 1 includes a base frame 11 and a top frame 12 located above the base frame 11. The base frame 11 is equipped with a lifting cylinder 13 for driving the top frame 12 to rise or fall. Rollers 111 are provided at the bottom of the base frame 11 to facilitate the overall pushing of the lifting frame 1. The lifting mechanism 2 is installed on the top of the top frame 12. The lifting mechanism 2 includes a lifting beam 21 and two winches 22. The wire ropes 23 of the winches 22 are equipped with flexible slings 24. By placing the flexible slings 24 on the straight section 92 of the bridge pipe 9, the entire bridge pipe 9 can be lifted upwards when the winches 22 wind up the wire ropes 23.

[0033] Reference Figure 2 , Figure 3 As shown, the first annular seat 3 and the second annular seat 4 overlap in their axial directions. The first annular seat 3 is vertically positioned at one end of the top frame 12, and an annular groove 31 is formed on the side of the first annular seat 3 facing the center position of the top frame 12 in the length direction. The second annular seat 4 is vertically positioned at the other end of the top frame 12, and a rotating disk 41 and a rotating component 42 for driving the rotating disk 41 to rotate are provided on the side of the second annular seat 4 facing the center position of the top frame 12 in the length direction. One of the limiting seats 5 is slidably installed in the annular groove 31 of the first annular seat 3, and the other limiting seat 5 is fixedly installed on the rotating disk 41. Each limiting seat 5 consists of an outer seat 51 and an inner seat 52. The inner seat 52 has an elbow groove 521 that matches the shape of the elbow section 91 of the bridge pipe 9, and the outer seat 51 is equipped with a positioning component 6 for fixing the position of the straight section 92 of the bridge pipe 9. When the steam pipeline bridge pipe 9 is hoisted to the designated height by the hoisting mechanism 2, the elbow section 91 of the bridge pipe 9 fits into the elbow groove 521 on the inner seat 52. At this time, the straight section 92 of the bridge pipe 9 is fixed by the positioning component 6, which can fix the relative position of the bridge pipe 9 and the outer seat 51. Then, the wire rope 23 is unwound a certain distance by the winch 22, and the rotating part 42 drives the rotating disk 41 to rotate, which can drive the limit seat 5 connected to the rotating disk 41 to rotate, so that the entire bridge pipe 9 can rotate to the designated state.

[0034] It should be noted that for elbow sections 91 of different shapes, inner seats 52 with different shaped elbow grooves 521 are required. Therefore, the inner seat 52 is detachably installed on the outer seat 51 for easy replacement. The detachable method between the inner seat 52 and the outer seat 51 is as follows: the inner seat 52 has a countersunk hole and is equipped with a countersunk bolt, and the outer seat 51 has a threaded hole for inserting the countersunk bolt. This allows for easy installation and removal of the inner seat 52 and the outer seat 51, and the countersunk hole does not affect the groove surface shape of the elbow groove 521.

[0035] Reference Figure 3 As shown, the rotating component 42 includes a support plate 421, a drive motor 422, and a gear 423. The support plate 421 is welded to the bottom of the second annular seat 4. The drive motor 422 is fixedly mounted on the support plate 421. The gear 423 is coaxially arranged on the output shaft of the drive motor 422. The rotating disk 41 is a geared disk, and the rotating disk 41 meshes with the gear 423. When the drive motor 422 is started, it drives the gear 423 to rotate. Under the meshing action of the gear 423, the rotating disk 41 rotates synchronously, thereby driving the limit seat 5 mounted on the rotating disk 41 to rotate synchronously, and thus driving the entire bridge pipe 9 to rotate.

[0036] Reference Figure 2 , Figure 4 As shown, an alignment member 7 is provided on the first annular seat 3. The alignment member 7 includes a mounting base 71, a support rod 72, and an alignment seat 73. The mounting base 71 is welded to the side of the first annular seat 3 away from the second annular seat 4. The support rod 72 is hinged inside the mounting base 71. The alignment seat 73 is installed at the end of the support rod 72 away from the mounting base 71. The alignment seat 73 has an arc-shaped groove 731 that matches the shape of the installed pipe 8. When the support rod 72 is rotated to a vertical position, the arc-shaped groove 731 is aligned with the axial direction of the first annular seat 3. During the process of pushing the lifting frame 1, the lifting cylinder 13 drives the top frame 12 to rise to its highest position. When the lifting frame 1 is pushed to the lifting position, the support rod 72 is rotated to a vertically downward state. Then, the lifting cylinder 13 drives the top frame 12 to descend until the arc groove 731 on the alignment seat 73 is in contact with the installed pipe 8. At this time, the axial directions of the first annular seat 3 and the second annular seat 4 are both consistent with the axial direction of the installed pipe 8. In this state, during the rotation of the rotating disk 41, the end of the elbow section 91 of the bridge pipe 9 always remains consistent with the axial direction of the installed pipe 8, thus facilitating the subsequent welding process. After the bridge pipe 9 is welded, the lifting cylinder 13 drives the top frame 12 to rise a certain distance, and then the support rod 72 is rotated upward to avoid the alignment part 7 being obstructed by the bridge pipe 9 when the lifting frame 1 is pushed forward, thus preventing the movement of the lifting frame 1 from being hindered.

[0037] Reference Figure 2As shown, the first annular seat 3 is welded to one end of the top frame 12, and the second annular seat 4 is slidably disposed at the other end of the top frame 12 along its length. A notch 211 is provided at the end of the lifting beam 21 away from the first annular seat 3 along its length. A sliding base 212 is slidably connected within the notch 211. One winch 22 is fixedly installed at the end of the lifting beam 21 near the first annular seat 3, and the other winch 22 is fixedly installed on the sliding base 212. To accommodate different working conditions, the straight section 92 of the bridge pipe 9 needs to have different lengths. To ensure the overall stability of the bridge pipe 9 during hoisting, the positions of the second annular seat 4 and one of the winches 22 need to be adaptable. Therefore, the second annular seat 4 is slidably installed on the top frame 12, and one of the winches 22 is slidably installed on the lifting beam 21.

[0038] Furthermore, a drive cylinder 43 is provided at the end of the top frame 12 away from the first annular seat 3 to drive the second annular seat 4 to move closer to or further away from the first annular seat 3. A connecting seat 44 is welded to the top of the second annular seat 4, and the top of the connecting seat 44 is welded to the sliding base 212. By driving the second annular seat 4 to move along the length direction of the lifting frame 1 by the drive cylinder 43, the distance between the second annular seat 4 and the first annular seat 3 can be changed, thereby making it suitable for bridge pipes 9 with different lengths of straight sections 92. At the same time as the second annular seat 4 moves, the connecting seat 44 drives the sliding base 212 to move synchronously, thereby causing the lifting mechanism 2 installed on the sliding base 212 to move, and the moving distance is consistent with the moving distance of the second annular seat 4.

[0039] Reference Figure 5 , Figure 6As shown, the positioning component 6 includes an arc-shaped seat 61, a mounting bracket 62, and a connector 63. The inner wall shape of the arc-shaped seat 61 is adapted to the shape of the straight section 92 of the bridge pipe 9. During the hoisting of the bridge pipe 9, when the bend section 91 of the bridge pipe 9 is in contact with the bend groove 521 on the inner seat 52, the straight section 92 of the bridge pipe 9 abuts against the inner wall of the arc-shaped seat 61. A through groove 611 for the flexible sling 24 to pass through is provided in the middle of the arc-shaped seat 61. The mounting bracket 62 is located at the end of the arc-shaped seat 61 facing the outer seat 51 and is detachably connected to the outer seat 51. The connector 63 is located at the end of the arc-shaped seat 61 away from the outer seat 51 and can be inserted into the through groove 611. When the bridge pipe 9 is hoisted to the designated height, the elbow section 91 of the bridge pipe 9 enters the inner seat 52 and fits against the elbow groove 521. At this time, the straight section 92 of the bridge pipe 9 abuts against the inner wall of the arc seat 61. The flexible sling 24 moves into the through groove 611. By passing the plug 63 through the through groove 611 and inserting it into the gap between the flexible sling 24 and the straight section 92, after the winch 22 unwinds the wire rope 23, the plug 63 can make the flexible sling 24 and the straight section 92 have a certain stability. Thus, during the process of the limit seat 5 driving the bridge pipe 9 to rotate, the bridge pipe 9 is not easy to detach from the limit seat 5. It should be noted that since there will inevitably be a small gap between the flexible sling 24 and the straight section 92 after the connector 63 is inserted, after the limit seat 5 is rotated to the designated position, the wire rope 23 needs to be wound up again by the winch 22 so that the straight section 92 is pressed against the inner wall of the arc seat 61.

[0040] Reference Figure 6 , Figure 7 As shown, the connector 63 includes a connector strip 631 and a telescopic electric cylinder 632. The connector strip 631 is slidably connected in the arc-shaped seat 61. The telescopic electric cylinder 632 is embedded in the arc-shaped seat 61 and can drive the connector strip 631 to insert into or move out of the through groove 611. When the connector strip 631 moves into the through groove 611, it can be inserted into the gap between the flexible sling 24 and the straight section 92 and fix the relative position of the straight section 92 and the arc-shaped seat 61. The inner wall of the arc-shaped seat 61 is embedded with a touch switch 633 for opening and closing the telescopic electric cylinder 632. When the straight section 92 of the bridge pipe 9 abuts against the inner wall of the arc-shaped seat 61, the touch switch 633 can open the telescopic electric cylinder 632, drive the piston rod of the electric cylinder 43 to move the plug strip 631 into the through groove 611 and insert it into the gap between the flexible sling 24 and the straight section 92, so as to fix the relative position between the straight section 92 and the arc-shaped seat 61.

[0041] Reference Figure 4 , Figure 5As shown, a limiting rod 53 is provided on the side of the limiting seat 5 facing the first annular seat 3. The limiting rod 53 is detachably connected to the limiting seat 5 by bolts. A limiting block 531 is provided at the end of the limiting rod 53 away from the first annular seat 3. The limiting block 531 is slidably disposed in the annular groove 31. Auxiliary rods 54 are provided on both sides of the bottom of the limiting seat 5 to improve the stability of the connection between the limiting seat 5 and the first annular seat 3. A sliding seat 55 is also installed in the annular groove 31. The sliding seat 55 has an installation groove 551. One end of the auxiliary rod 54 is hinged to the limiting seat 5, and the other end is detachably connected to the installation groove 551. After the bridge pipe 9 is welded, the limiting seat 5 needs to be removed from the first annular seat 3 to facilitate the separation of the lifting frame 1 from the welded bridge pipe 9. At this time, the bolt on the limiting rod 53 is removed from the limiting seat 5, and then the auxiliary rod 54 is removed from the mounting groove 551, so that the limiting seat 5 can be removed from the first annular seat 3, so that the lifting frame 1 can be pushed out from the welded bridge pipe 9.

[0042] Reference Figure 5 , Figure 6 As shown, the top two sides of the outer seat 51 are provided with first slots 511 for the mounting bracket 62 to be inserted. The mounting bracket 62 is provided with a positioning pin 621. The groove wall of the first slot 511 is provided with a first positioning hole 512 for the positioning pin 621 to be inserted. The bottom two sides of the outer seat 51 are provided with second slots 513 for the mounting bracket 62 to be inserted. The groove wall of the second slot 513 is provided with a second positioning hole 514 for the positioning pin 621 to be inserted. When the mounting bracket 62 is inserted into the second slot 513, the inner wall of the arc-shaped seat 61 is aligned with the axial direction of the arc-shaped groove 731 on the alignment seat 73. When hoisting the bridge pipe 9, the mounting bracket 62 is inserted into the first slot 511 and the positioning pin 621 is inserted into the first positioning hole 512, so that the arc-shaped seat 61 can fit against the straight section 92 of the bridge pipe 9. When hoisting ordinary straight pipes in steam pipes, the mounting bracket 62 is inserted into the second slot 513 and the positioning pin 621 is inserted into the second positioning hole 514, so that the arc-shaped seat 61 can fit against the ordinary straight pipe. It should be noted that when the mounting bracket 62 is inserted into the second slot 513, the axial direction of the inner wall of the arc-shaped seat 61 is consistent with the axial direction of the arc-shaped groove 731 on the alignment seat 73, so as to ensure that the straight pipe to be installed is coaxial with the installed pipe 8.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A boiler steam pipe hoisting device, characterized in that, include: The hoisting frame (1) includes a base frame (11) and a top frame (12) disposed above the base frame (11). The base frame (11) is provided with a lifting electric cylinder (13) for driving the top frame (12) to rise or fall. The bottom of the base frame (11) is provided with rollers (111). The hoisting mechanism (2) is located on the top of the top frame (12). The hoisting mechanism (2) includes a hoisting beam (21) and two winches (22). The wire ropes (23) of the winches (22) are equipped with flexible slings (24). The first annular seat (3) is vertically disposed at one end of the top frame (12), and the side of the first annular seat (3) facing the center position of the length direction of the top frame (12) is provided with an annular groove (31); The second annular seat (4) is vertically arranged at the other end of the top frame (12), and the side of the second annular seat (4) facing the center position of the top frame (12) in the length direction is provided with a rotating disk (41) and a rotating component (42) for driving the rotating disk (41) to rotate. Two limiting seats (5), one of which is slidably disposed in the annular groove (31) of the first annular seat (3), and the other is fixedly disposed on the rotating disk (41). The limiting seat (5) includes an outer seat (51) and an inner seat (52) detachably disposed on the outer seat (51). The inner seat (52) is provided with an elbow groove (521) that matches the shape of the elbow section (91) of the bridge pipe (9). The outer seat (51) is provided with a positioning component (6) for fixing the position of the straight section (92) of the bridge pipe (9). The positioning component (6) includes an arc-shaped seat (61), a mounting bracket (62), and a connector (63). The inner wall shape of the arc-shaped seat (61) is adapted to the shape of the straight section (92) of the bridge pipe (9). When the bend section (91) of the bridge pipe (9) is in contact with the bend groove (521), the straight section (92) of the bridge pipe (9) abuts against the inner wall of the arc-shaped seat (61). A through groove (611) for the flexible sling (24) to pass through is provided in the middle of the arc-shaped seat (61). The mounting bracket (62) is located at one end of the arc-shaped seat (61) facing the outer seat (51) and is detachably connected to the outer seat (51). The connector (63) is located at one end of the arc-shaped seat (61) away from the outer seat (51) and can be inserted into the through groove (611).

2. The boiler steam pipe hoisting device according to claim 1, characterized in that: The first annular seat (3) is provided with an alignment member (7). The alignment member (7) includes a mounting base (71), a support rod (72), and an alignment seat (73). The mounting base (71) is fixedly disposed on the side of the first annular seat (3) away from the second annular seat (4). The support rod (72) is hinged in the mounting base (71). The alignment seat (73) is disposed at the end of the support rod (72) away from the mounting base (71). The alignment seat (73) is provided with an arc-shaped groove (731) that matches the shape of the installed pipe (8). When the support rod (72) is rotated to a vertical state, the arc-shaped groove (731) is aligned with the axial direction of the first annular seat (3).

3. The boiler steam pipe hoisting device according to claim 1, characterized in that: The connector (63) includes a connector strip (631) and a telescopic electric cylinder (632). The connector strip (631) is slidably disposed in the arc-shaped seat (61). The telescopic electric cylinder (632) is embedded in the arc-shaped seat (61) and can drive the connector strip (631) to insert into or move out of the through slot (611). When the connector strip (631) moves into the through slot (611), it can be inserted into the gap between the flexible sling (24) and the straight section (92) and fix the relative position of the straight section (92) and the arc-shaped seat (61).

4. The boiler steam pipe hoisting device according to claim 3, characterized in that: The inner wall of the arc-shaped seat (61) is provided with a touch switch (633) for opening and closing the telescopic electric cylinder (632). When the straight section (92) of the bridge pipe (9) abuts against the inner wall of the arc-shaped seat (61), the touch switch (633) can open the telescopic electric cylinder (632).

5. The boiler steam pipe hoisting device according to claim 1, characterized in that: The top two sides of the outer seat (51) are provided with first slots (511) for the mounting bracket (62) to be inserted. The mounting bracket (62) is provided with a positioning pin (621). The groove wall of the first slot (511) is provided with a first positioning hole (512) for the positioning pin (621) to be inserted. The bottom two sides of the outer seat (51) are provided with second slots (513) for the mounting bracket (62) to be inserted. The groove wall of the second slot (513) is provided with a second positioning hole (514) for the positioning pin (621) to be inserted. When the mounting bracket (62) is inserted into the second slot (513), the inner wall of the arc-shaped seat (61) is aligned with the axial direction of the arc-shaped groove (731) on the alignment seat (73).

6. The boiler steam pipe hoisting device according to claim 1, characterized in that: The first annular seat (3) is fixedly installed at one end of the top frame (12), and the second annular seat (4) is slidably installed at the other end of the top frame (12) along the length direction of the top frame (12); the end of the hoisting beam (21) away from the first annular seat (3) has a notch (211) along its own length direction, and a sliding base (212) is slidably connected in the notch (211); one of the winches (22) is fixedly installed at the end of the hoisting beam (21) close to the first annular seat (3), and the other winch (22) is fixedly installed on the sliding base (212).

7. The boiler steam pipe hoisting device according to claim 6, characterized in that: The top frame (12) is provided with a drive cylinder (43) at one end away from the first annular seat (3) for driving the second annular seat (4) to move closer to or away from the first annular seat (3). The top of the second annular seat (4) is provided with a connecting seat (44), which is fixedly connected to the sliding base (212).

8. The boiler steam pipe hoisting device according to claim 1, characterized in that: The rotating component (42) includes a support plate (421), a drive motor (422), and a gear (423). The support plate (421) is fixedly mounted on the second annular seat (4). The drive motor (422) is fixedly mounted on the support plate (421). The gear (423) is coaxially mounted on the output shaft of the drive motor (422). The rotating disk (41) is a toothed disk and meshes with the gear (423).

9. The boiler steam pipe hoisting device according to claim 1, characterized in that: The limiting seat (5) is provided with a limiting rod (53) on the side facing the first annular seat (3). The limiting rod (53) is detachably connected to the limiting seat (5) by bolts. The end of the limiting rod (53) away from the first annular seat (3) is provided with a limiting block (531). The limiting block (531) is slidably disposed in the annular groove (31). The bottom sides of the limiting seat (5) are provided with auxiliary rods (54). The annular groove (31) is also provided with a sliding seat (55). The sliding seat (55) is provided with an installation groove (551). One end of the auxiliary rod (54) is hinged to the limiting seat (5) and the other end is detachably connected to the installation groove (551).

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