CCPP waste heat boiler heating surface module tube panel single-machine hoisting device and operation method thereof

Abstract

The invention belongs to the technical field of hoisting of large-size and heavy-weight flexible objects, and particularly relates to a CCPP waste heat boiler heating surface module tube panel single-machine hoisting device and an operation method thereof.The CCPP waste heat boiler heating surface module tube panel single-machine hoisting device comprises a stretcher, a crawling ladder, a steel cross beam, a hinged steel support, stretcher lifting lugs, a supporting plate and a supporting frame, and the stretcher is of a long and thin bracket structure and is matched with a heating surface module tube panel in shape; the tail end of the stretcher is hinged to a hinged steel support, and the hinged steel support is connected with a ground foundation. A cross beam lifting lug is arranged on the steel cross beam and is connected with a connecting lifting lug on the lifting frame through a pin shaft; a tube panel lifting lug is also arranged on the lifting frame; the stretcher and the lifting frame are fixed by spot welding on site through rib plates; when the stretcher is located at the vertical position, the hinged steel supports are fixedly connected with a ground foundation through foundation bolts. The invention has the beneficial effects that the combined body of the stretcher and the module can be rotated from a horizontal state to an upright state only by using one crane, so that the problem that two large cranes are difficult to arrange and carry out operation at the same time due to a narrow field is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of hoisting large-volume and heavy-weight flexible objects, and in particular relates to a single-unit hoisting device for a heating surface module tube panel of a CCPP waste heat boiler and an operating method thereof. Background Art

[0002] The CCPP waste heat boiler heating surface module tube panels are large, heavy (approximately 100 tons), and flexible. During hoisting, the modules need to be placed and fixed on a rigid lifting stretcher. One crane holds the stretcher head, while another crane holds the module head. The two cranes work together to rotate the module and stretcher assembly from a horizontal position to an upright position via the pivot at the bottom of the assembly. In the upright position, the stretcher and module are separated. After separation, one crane returns the stretcher to its original position, preparing for the next set of modules to be hoisted, while the other crane hoists the modules to the installation location. Because two cranes are required to operate simultaneously, the hoisting process is complex, there are many unsafe factors, and the cost of each crane is relatively high.

[0003] Chinese invention patent application number 202310425697.6 discloses a CCPP waste heat boiler heating surface module tube panel lifting fixture. The fixture comprises a main beam, a porous hanger plate, a secondary beam, a first wire rope tie, a second wire rope tie, and several shackles. The porous hanger plate is connected to the bottom of the main beam, which is then connected to the secondary beam via the first wire rope tie. The secondary beam consists of multiple beams arranged perpendicular to the main beam and connected to the lifting points on the module to be lifted via the second wire rope tie. The connection position of the first wire rope tie on the porous hanger plate is adjusted according to the length of the module to be lifted, and the position of the secondary beam lifting lugs on the secondary beam is adjusted according to the width of the module to be lifted. This fixture cannot flip the heating surface module tube panel and cannot meet production requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a stand-alone lifting device and method for the heating surface module tube panel of a CCPP waste heat boiler. This device overcomes the shortcomings of the prior art by effectively fixing the head of a lifting stretcher to the head of the heating surface module tube panel. A single crane is used to rotate the stretcher and module assembly from a horizontal position to an upright position to complete module lifting. The stretcher is then returned to its original position, saving shift costs and resolving the difficulty of arranging two large cranes to carry out simultaneous operations due to limited space.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions:

[0006] Technical solution 1: A single-unit lifting device for the heating surface module tube panel of the CCPP waste heat boiler includes a stretcher, a ladder, a steel beam, an articulated steel support, a stretcher lug, a support plate and a support frame. The stretcher is a slender bracket structure that matches the shape of the heating surface module tube panel. The head end of the stretcher is provided with a steel beam, and the tail end of the stretcher is hinged to the articulated steel support, which is connected to the ground foundation. The stretcher is provided with a support plate and a support frame for fixing the heating surface module tube panel. The steel beam is connected to the steel column through the steel column. The stretcher is connected; a beam lug is provided on the steel beam, and the beam lug is connected to the connecting lug on the lifting frame of the tube panel head of the heating surface module through a pin; the lifting frame is also provided with a tube panel lifting lug; the stretcher and the lifting frame are fixed on site by spot welding through a stiffener; a ladder is provided on the side of the stretcher, and when the stretcher is in a vertical position, the top of the ladder is higher than the tube panel lifting lug, and the articulated steel support is connected and fixed to the ground foundation through anchor bolts; a stretcher lifting lug is provided at the head end of the stretcher.

[0007] Furthermore, the stretcher lifting lugs are connected to the crane hook head via a clamp, a steel wire rope, and a steel shoulder pole in sequence.

[0008] Furthermore, the steel shoulder pole is connected to the crane hook head through multiple pairs of hand-pulled hoists to keep the left and right forces of the stretcher symmetrical and balanced.

[0009] Furthermore, the CCPP waste heat boiler heating surface module tube panel stand-alone hoisting device according to claim 1 is characterized in that the specifications of the heating surface module tube panel are 19 meters in length, 3.8 meters in width, and 2.6-3.4 meters in height.

[0010] Furthermore, the stretcher is switched between horizontal and vertical positions under the action of the crane hook head with the hinged steel support as the axis, thereby completing the lifting posture conversion of the heating surface module tube panel.

[0011] Technical Solution 2: The method for operating a stand-alone lifting device for the CCPP waste heat boiler heating surface module tube panel is to use only one crane to rotate the stretcher and module assembly from a horizontal state to an upright state, including horizontal positioning, vertical separation, and stretcher resetting. The specific operating steps are as follows:

[0012] 1) Horizontal positioning: Place the stretcher steadily on the ground. The tail end of the stretcher is hinged to the hinged steel support, and the hinged steel support is connected to the ground foundation. Place the heating surface module tube panel steadily on the support frame of the stretcher. The stretcher and the heating surface module tube panel head hoisting frame are fixed on site by spot welding with ribs. The crossbeam lugs are connected to the connecting lugs on the hoisting frame through pins. The crane hook is connected to the stretcher lugs through steel wire ropes and clamps. Adjust the steel shoulder pole to the appropriate position using a hand hoist.

[0013] 2) Vertical separation: The crane hook head slowly lifts and rotates the stretcher and the heating surface module tube panel assembly from a horizontal state to an upright state. In the upright state, the hinged steel support is fixed to the ground foundation through anchor bolts. The operator climbs up to the stretcher head through a ladder, unties the wire rope from the clamp, and moves the crane hook head to connect it to the tube panel lifting lug through the wire rope and clamp. The crane hoists the heating surface module tube panel, cuts the welding point between the rib plate and the hoisting frame, removes the pin shaft, and completely separates the heating surface module tube panel from the stretcher. The crane hoists the heating surface module tube panel to the installation position.

[0014] 3) After the stretcher is reset and the heating surface module tube panel is hoisted, the crane hook is transferred again and connected to the stretcher lug through the wire rope and the clamp. The crane lifts the stretcher, loosens the anchor bolts, resets the stretcher smoothly and places it on the ground, and starts hoisting the next set of heating surface module tube panels.

[0015] Furthermore, the crane operates as a single vehicle throughout the entire lifting process.

[0016] Furthermore, the support plate and the supporting frame are removed or not removed after the heating surface module tube panel is hoisted to the installation position.

[0017] Furthermore, the heating surface module tube panel is pre-installed on a support plate before hoisting, and a plurality of support frames enable the heating surface module tube panel to remain parallel to the support plate in the length direction.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1) By effectively fixing the head of the stretcher to the head of the heating surface module tube panel, only one crane is needed to rotate the stretcher and module combination from a horizontal state to an upright state, quickly completing the module hoisting, and then returning the stretcher to its original position, thus solving the problem of two large cranes being difficult to arrange and carry out operations simultaneously due to the limited space;

[0020] 2) The present invention can complete all lifting work with one crane, saving the cost of work shifts. The entire operation process is simple, practical, safe and efficient, and successfully eliminates the potential safety hazards in the operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the flipping action of the heating surface module tube panel according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0023] Figure 3 This is a left side view of the stretcher in a horizontal state according to an embodiment of the present invention;

[0024] In the figure: 1-heating surface module tube panel, 2-hoisting frame, 3-tube panel lifting eye, 4-support plate, 5-beam lifting eye, 6-connecting lifting eye, 7-steel beam, 8-steel column, 9-steel diagonal brace, 10-stretcher lifting eye, 11-stretcher, 12-pin shaft, 13-ribbed plate, 14-ladder, 15-clamp, 16-steel wire rope, 17-steel shoulder pole, 18-support frame, 19-hand hoist, 20-crane hook head, 21-hinged steel support, 22-anchor bolt. DETAILED DESCRIPTION

[0025] The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the specific embodiments required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the present invention. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying any creative work.

[0027] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but is merely representative of selected embodiments of the present invention.

[0028] See Figure 1-3, is a structural diagram of an embodiment of a CCPP waste heat boiler heating surface module tube panel stand-alone hoisting device of the present invention, comprising a stretcher 11, a ladder 14, a steel beam 7, an articulated steel support 21, a stretcher lifting lug 10, a support plate 4 and a support frame 18. The stretcher 11 is a slender bracket structure that matches the shape of the heating surface module tube panel 1. The head end of the stretcher 11 is provided with a steel beam 7, and the tail end of the stretcher 11 is hinged to the articulated steel support 21, and the articulated steel support 21 is connected to the ground foundation; the stretcher 11 is provided with a support plate 4 and a support frame 18 for fixing the heating surface module tube panel 1; the steel beam 7 is connected to the stretcher 11 through a steel column 8, and the steel support 21 is connected to the ground foundation. A steel diagonal brace 9 is also connected between the crossbeam 7 and the stretcher 11, so that it can maintain sufficient strength to prevent deformation after being subjected to force; a crossbeam lifting lug 5 is provided on the steel crossbeam 7, and a connecting lifting lug 6 and a tube screen lifting lug 3 are also provided on the lifting frame 2; the crossbeam lifting lug 5 is connected to the connecting lifting lug 6 through a pin 12; the stretcher 11 and the lifting frame 2 are fixed on-site by spot welding through a stiffener 13; a ladder 14 is provided on the side of the stretcher 11, and when the stretcher 11 is in a vertical position, the top of the ladder 14 is higher than the connecting lifting lug 6, and the articulated steel support 21 is connected and fixed to the ground foundation through an anchor bolt 22; a stretcher lifting lug 10 is provided at the head end of the stretcher 11.

[0029] The stretcher lifting lug 10 is connected to the crane hook 20 through a clamp 15, a steel wire rope 16, and a steel shoulder pole 17 in sequence.

[0030] The steel shoulder pole 17 is connected to the crane hook 20 through a pair of hand-pulled hoists 19 to keep the left and right forces of the stretcher 11 symmetrical and balanced, and prevent the skewed force from damaging the heating surface module tube panel 1.

[0031] The heating surface module tube panel 1 is pre-installed on the support plate 4. The support plate 4 is provided with a plurality of support frames 18 to keep the heating surface module tube panel 1 parallel to the support plate in the length direction so that the force is balanced.

[0032] In this embodiment, the applicable heating surface module tube panel 1 has specifications of 19 meters in length, 3.8 meters in width, and 2.6-3.4 meters in height. The stretcher 11, pivoted by the articulated steel support 21, is moved between horizontal and vertical positions by the crane hook 20, completing the transition between the hoisting positions of the heating surface module tube panel 1.

[0033] The method for operating the stand-alone lifting device for the heating surface module tube panel of a CCPP waste heat boiler of the present invention uses only one crane to rotate the stretcher and module assembly from a horizontal state to an upright state, including horizontal positioning, vertical separation, and stretcher repositioning. The crane operates alone throughout the entire lifting process. The specific operating steps are as follows:

[0034] 1) Horizontal positioning: Place the stretcher 11 steadily on the ground. The rear end of the stretcher 11 is hinged to the hinged steel support 21, which is connected to the ground foundation. Place the heating surface module tube panel 1 steadily on the stretcher 11. The stretcher 11 and the heating surface module tube panel 1 head hoisting frame 2 are fixed on-site by spot welding using ribs 13. The crossbeam lug 5 is connected to the connecting lug 6 on the hoisting frame 2 via the pin 12. The crane hook 20 is connected to the stretcher lug 10 via the wire rope 16 and the clamp 15. Adjust the steel shoulder pole 17 to the appropriate position using the hand hoist 19.

[0035] 2) Vertical separation: The crane hook 20 is slowly lifted to rotate the stretcher 11 and the heating surface module tube panel 1 assembly from a horizontal state to an upright state. In the upright state, the hinged steel support 21 is fixed to the ground foundation through the anchor bolts 22. The operator climbs to the head of the stretcher 11 through the ladder 14, unties the wire rope 16 from the clamp 15, and moves the crane hook 20 to connect it to the connecting lug through the wire rope 16 and the clamp 15. The crane then lifts the heating surface module tube panel. 1. Cut the weld between the rib plate 13 and the hoisting frame 2, remove the pin 12, and completely separate the heating surface module tube panel 1 from the stretcher 11. Use a crane to hoist the heating surface module tube panel 1 to the installation location. After the heating surface module tube panel is hoisted to the installation location, the pallet 4 and support frame 18 may be removed or not, depending on the packaging form of the heating surface module tube panel 1. If the pallet and support frame are provided, the pallet 4 and support frame 18 on the hoisting device of the present invention can be removed after use; otherwise, they can be retained.

[0036] 3) After the stretcher is reset and the heating surface module tube panel 1 is hoisted, the crane hook 20 is transferred again and connected to the stretcher lifting lug 10 via the wire rope 16 and the clamp 15. The crane lifts the stretcher 11, loosens the anchor bolts 22, and smoothly resets the stretcher 11 to the ground. Then, the next set of heating surface module tube panels 1 is hoisted.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. CCPP waste heat boiler heating surface module tube panel single unit hoisting device, characterized by: It includes a stretcher, a ladder, a steel beam, an articulated steel support, a stretcher lug, a pallet and a support frame. The stretcher is a slender bracket structure that matches the shape of the heating surface module tube panel. The head end of the stretcher is provided with a steel beam, and the tail end of the stretcher is hinged to the articulated steel support, which is connected to the ground foundation. The stretcher is provided with a pallet and a support frame for fixing the heating surface module tube panel. The steel crossbeam is connected to the stretcher through a steel column; the steel crossbeam is provided with a crossbeam lug, which is connected to the connecting lug provided on the heating surface module tube panel head hanging frame through a pin; the hanging frame is also provided with a tube panel hanging lug; the stretcher and the hanging frame are fixed on site by spot welding through a stiffener plate; A ladder is provided on the side of the stretcher. When the stretcher is in a vertical position, the top of the ladder is higher than the pipe screen lifting lug. The hinged steel support is connected and fixed to the ground foundation by anchor bolts. A stretcher lifting lug is provided at the head end of the stretcher.

2. The CCPP waste heat boiler heating surface module tube panel stand-alone hoisting device according to claim 1 is characterized in that: The stretcher lifting lugs are connected to the crane hook head through a clamp ring, a steel wire rope and a steel shoulder pole in sequence.

3. The CCPP waste heat boiler heating surface module tube panel stand-alone hoisting device according to claim 2 is characterized in that: The steel shoulder pole is connected to the crane hook head through multiple pairs of hand-pulled hoists to keep the left and right forces of the stretcher symmetrical and balanced.

4. The CCPP waste heat boiler heating surface module tube panel stand-alone hoisting device according to claim 1 is characterized in that: The CCPP waste heat boiler heating surface module tube panel stand-alone hoisting device according to claim 1 is characterized in that the heating surface module tube panel has a specification of 19 meters in length, 3.8 meters in width, and 2.6-3.4 meters in height.

5. The CCPP waste heat boiler heating surface module tube panel single unit hoisting device according to claim 1 is characterized in that: The stretcher uses the hinged steel support as the axis and is switched between the horizontal and vertical positions under the action of the crane hook head to complete the lifting posture conversion of the heating surface module tube panel.

6. The method for operating a single-unit lifting device for a CCPP waste heat boiler heating surface module tube panel according to claims 1-5 is characterized in that: Only one crane is used to rotate the stretcher and module assembly from a horizontal position to an upright position, including horizontal positioning, vertical separation and stretcher reset. The specific operation steps are as follows: 1) Horizontal positioning: Place the stretcher steadily on the ground. The tail end of the stretcher is hinged to the hinged steel support, and the hinged steel support is connected to the ground foundation. Place the heating surface module tube panel steadily on the support frame of the stretcher. The stretcher and the heating surface module tube panel head hoisting frame are fixed on site by spot welding with ribs. The crossbeam lugs are connected to the connecting lugs on the hoisting frame through pins. The crane hook is connected to the stretcher lugs through steel wire ropes and clamps. Adjust the steel shoulder pole to the appropriate position using a hand hoist. 2) Vertical separation: The crane hook head slowly lifts and rotates the stretcher and the heating surface module tube panel assembly from a horizontal state to an upright state. In the upright state, the hinged steel support is fixed to the ground foundation through anchor bolts. The operator climbs up to the stretcher head through a ladder, unties the wire rope from the clamp, and moves the crane hook head to connect it to the tube panel lifting lug through the wire rope and clamp. The crane hoists the heating surface module tube panel, cuts the welding point between the rib plate and the hoisting frame, removes the pin shaft, and completely separates the heating surface module tube panel from the stretcher. The crane hoists the heating surface module tube panel to the installation position. 3) After the stretcher is reset and the heating surface module tube panel is hoisted, the crane hook is transferred again and connected to the stretcher lug through the wire rope and the clamp. The crane lifts the stretcher, loosens the anchor bolts, resets the stretcher smoothly and places it on the ground, and starts hoisting the next set of heating surface module tube panels.

7. The method for operating a single-unit lifting device for a CCPP waste heat boiler heating surface module tube panel according to claim 6 is characterized in that: The crane is operated as a single vehicle throughout the entire lifting process.

8. The method for operating a single-unit lifting device for a CCPP waste heat boiler heating surface module tube panel according to claim 6 is characterized in that: The support plate and the supporting frame may be removed or not removed after the heating surface module tube panel is hoisted to the installation position.

9. The method for operating a single-unit hoisting device for a CCPP waste heat boiler heating surface module tube panel according to claim 6, characterized in that: The heating surface module tube panel is pre-installed on a support plate before hoisting, and a plurality of support frames enable the heating surface module tube panel to remain parallel to the support plate in the length direction.

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