Intelligent monitoring high-precision positioning drum hoisting device and its application hoisting method

Abstract

The present invention discloses an intelligent monitoring high-precision positioning drum hoisting device and a hoisting method using the same, wherein the intelligent monitoring high-precision positioning drum hoisting device comprises a support beam assembly, a hydraulic lifting assembly fixed on the support beam assembly, a steel strand anchored to the hydraulic lifting assembly, and a monitoring alarm assembly for real-time monitoring of the boiler drum hoisting process. A boiler drum double-hanging-point tilt hoisting method is also disclosed, which utilizes two sets of the above-mentioned positioning drum hoisting devices to perform double-hanging-point tilt hoisting on the boiler drum, and performs a trial hoisting before formal hoisting to check whether the device and related control circuits are working normally; during formal hoisting, the position of the boiler drum is monitored in real time through the monitoring alarm assembly, and obstacles are avoided until the boiler drum is safely in place. During the hoisting process, the present invention can perform digital and intelligent monitoring of the boiler drum, and ensure the force balance of related components, so that the boiler drum can be safely and stably in place.

Description

Technical Field

[0001] The invention belongs to the technical field of installation engineering of large thermal power plants, and relates to the hoisting of a boiler drum, and specifically is an intelligent monitoring high-precision positioning drum hoisting device and a hoisting method for the application thereof. Background Art

[0002] In the installation of large thermal power plants, domestic hoists or large cranes are generally used to hoist the boiler drum into place, and after long-term research by professionals, this hoisting technology has become very mature. However, with the leapfrog development of high-parameter, large-capacity, and multi-type thermal power station units at home and abroad, the power station system design has been continuously optimized, and the plane layout space has gradually compressed. The layout position of the steam drum, an important component of the boiler in the thermal power plant, has been continuously improved, and the hoisting space of the equipment on the construction site has also been continuously reduced.

[0003] However, the traditional vertical lifting technology (using a winch or a large crane to lift the boiler drum into place) can no longer meet the needs of the new situation due to the common defects of slow construction progress, high cost, long construction period, high expenses, and low intelligence. How to improve the level of boiler drum lifting technology has become an important research topic in the field of large-scale thermal power plant installation engineering. At present, the industry has developed a method for lifting the boiler drum of a thermal power plant using hydraulic lifting equipment, which can safely lift the drum to a higher position at a construction site with narrow space and complex environment. However, in the process of lifting the boiler drum using hydraulic lifting equipment, there are still the following technical problems that need to be solved, specifically:

[0004] (1) It is difficult to adjust the force of related components during the lifting process

[0005] The calculation of the lifting lug force shows that during the boiler drum hoisting process, the force on the left side of the drum is greater than that on the right side of the drum. If the force on the relevant components is unbalanced, the drum will easily collide with the boiler steel frame due to the up and down resonance during the drum tilt and horizontal adjustment, forming a dangerous point, and the safety and stability during the hoisting process will be difficult to ensure.

[0006] (2) Due to uneven force, the hoisting steel strand is prone to tilt

[0007] During the process of adjusting the boiler drum's tilt and level, the lifting steel strands are difficult to maintain in a relatively vertical state due to uneven force, which leads to deviations in the adjustment of the drum's position. The lifting accuracy is greatly reduced, which seriously slows down the efficiency of the drum's lifting.

[0008] (3) It is extremely difficult to adjust the real-time position of the boiler drum during the lifting process

[0009] During the boiler drum hoisting process, manual inspections are often used to observe the real-time position of the boiler drum, and remotely command relevant personnel to adjust the position of the boiler drum. The degree of intelligence is low, and the position of the boiler drum is judged only by the naked eye, and the accuracy is difficult to guarantee. It is easy to make command errors and adjust the drum position incorrectly, which may cause the drum to collide with obstacles in the hoisting channel. Summary of the invention

[0010] In order to solve the above-mentioned deficiencies in the prior art, the present invention aims to provide an intelligent monitoring high-precision positioning steam drum hoisting device and a hoisting method using the same, so that the boiler steam drum can be digitally and intelligently monitored during the hoisting process and the force balance of related components can be ensured, thereby achieving the purpose of safely and stably positioning the boiler steam drum.

[0011] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: an intelligent monitoring high-precision positioning steam drum hoisting device, comprising a support beam assembly, a hydraulic lifting assembly fixedly mounted on the support beam assembly, and a steel strand anchored to the hydraulic lifting assembly; further comprising a monitoring and alarm assembly for real-time monitoring of the position of the boiler steam drum during the hoisting process; the monitoring and alarm assembly comprises a laser rangefinder and an elevation locator both fixedly mounted at both ends of the boiler steam drum, and an electronic theodolite disposed below the support beam assembly, and the laser rangefinder, the elevation locator and the electronic theodolite are all electrically connected to an electrical control cabinet.

[0012] As a limitation of the present invention, a steel strand guide frame is also provided on the support beam assembly, and the steel strand guide frame is used to support the steel strand spitted out from above the hydraulic lifting assembly.

[0013] As a further limitation of the present invention, the support beam assembly includes at least two fixed support beams fixed side by side on the boiler top plate beam layer, at least two longitudinal movable beams fixed side by side on the fixed support beam slideway, and a transverse movable beam fixed on the longitudinal movable beam slideway; wherein the hydraulic lifting assembly and the steel strand guide frame are both fixed on the transverse movable beam.

[0014] As a further limitation of the present invention, the longitudinal moving beam is fixed on the slideway of the fixed support beam through a first weight shifter, and the slideway of the fixed support beam is provided with a first traction fall chain for controlling the movement of the first weight shifter; the transverse moving beam is fixed on the longitudinal moving beam through a second weight shifter, and the longitudinal moving beam is provided with a second traction fall chain for controlling the movement of the second weight shifter.

[0015] As another limitation of the present invention, it also includes a transverse lifting beam which is arranged just above the boiler drum lifting point and is fixedly connected to the transverse moving beam through a steel strand.

[0016] As a further limitation of the present invention, a pin-shaft hanging plate for connecting to the boiler drum is fixedly provided below the transverse lifting beam.

[0017] The present invention also discloses a boiler drum double-hanging-point inclined hoisting method, which uses two sets of intelligent monitoring high-precision positioning drum hoisting devices as described in any one of claims 1 to 6, and includes the following steps performed in sequence:

[0018] S1. Install two sets of drum hoisting devices on both sides of the top of the boiler respectively, debug the hydraulic lifting components, and check whether the drum hoisting devices meet the lifting conditions;

[0019] S2. Control the drum hoisting device to test-lift the boiler drum and check whether the drum hoisting device and related control circuits are working properly;

[0020] S3. Control the drum hoisting device to tilt the boiler drum. During the tilt hoisting process, the position of the boiler drum is monitored in real time through the monitoring alarm component to avoid obstacles until the boiler drum is safely in place.

[0021] As a limitation of the present invention, step S2 includes the following steps performed in sequence:

[0022] b1. Control two sets of hydraulic lifting components to synchronously lift the two lifting points of the boiler drum by half a stroke, pause the lifting, and check whether the drum lifting device is working normally;

[0023] b2. After ensuring that the drum hoisting device is working properly, continue to control the two sets of hydraulic lifting components, synchronously lift the two lifting points of the boiler drum by two strokes, then lower it by one stroke, pause the lifting, and check whether the relevant control circuits in the drum hoisting device are working properly;

[0024] b3. After the above work is completed and confirmed to be correct, formal lifting will begin.

[0025] As a further limitation of the present invention, in step S3, the tilting hoisting process of the boiler drum is as follows:

[0026] c1. Control the first group of hydraulic lifting components to lift one lifting point of the boiler drum separately, so that the boiler drum is tilted by 20° to 40°, ensuring that the total projected length of the boiler drum is less than the clear distance between the main columns of the boiler furnace;

[0027] c2. Control the second traction fall chain to adjust the position of the transverse moving beam to restore the steel strand to a vertical state;

[0028] c3. Control two sets of hydraulic lifting components to synchronously lift the two lifting points of the boiler drum. When the high-position lifting point of the drum exceeds the actual elevation, the lifting is suspended;

[0029] c4. Control the second set of hydraulic lifting components to lift the low-position lifting point of the boiler drum, and at the same time control the first set of hydraulic lifting components to lower the high-position lifting point of the boiler drum, and control the second traction fall chain to adjust the position of the transverse moving beam until the boiler drum returns to a horizontal state at the in-place elevation;

[0030] c5. Control the first traction fall chain to adjust the position of the longitudinal moving beam and move the boiler drum to the in-place position;

[0031] c6. After the boiler drum is hoisted into place, install the drum hoisting rod and control the two sets of hydraulic lifting components to fine-tune the elevation of the boiler drum until it reaches the preset value, thus completing the hoisting operation of the boiler drum.

[0032] As another limitation of the present invention, in step S3, the monitoring process of the boiler drum by the monitoring alarm component is as follows:

[0033] d1. The laser rangefinder in the monitoring alarm component monitors the distance between the boiler drum and obstacles in the lifting channel, and transmits the data to the electrical control cabinet in real time;

[0034] d2. At the same time, the elevation locator in the monitoring alarm component monitors the overall elevation, inclination angle and horizontality of the boiler drum, and transmits the data to the electrical control cabinet in real time;

[0035] d3. At the same time, the electronic theodolite in the monitoring alarm component monitors the side length error and vertical angle of obstacles in the lifting channel, and transmits the data to the electrical control cabinet in real time;

[0036] d4. The electrical control cabinet aggregates and processes the above data and displays it to the on-site operators through the control panel.

[0037] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0038] (1) The present invention adopts a hydraulic lifting assembly to hoist the boiler drum. Compared with the traditional hoisting method of winch and pulley block, it has a large lifting capacity and is simple to operate. As long as there is a reasonable weighing and lifting point, the lifting height is not limited. Compared with the traditional hoisting method of large crane equipment of the same tonnage, it is smaller in size and lighter in weight, occupies less space on the construction site, and has unique advantages in construction occasions with narrow space and inaccessible to conventional large cranes. In addition, the overall structure of the device is easy to disassemble and install, and the construction period is short. It can not only meet the needs of vertical hoisting of a single boiler drum, but also can be used in the hoisting of different equipment in similar construction environments after the construction is completed. It has a high reuse rate and considerable economic benefits.

[0039] (2) The present invention integrates a laser rangefinder, an electronic theodolite and an altitude locator to form a monitoring and alarm component, and various monitoring data can be intuitively displayed on the control panel of the electrical control cabinet, which is convenient for the staff to adjust the real-time position of the boiler drum. The device has a high degree of intelligence and can effectively reduce the impact of on-site weather or other human factors. Combined with manual inspection, it can ensure the accuracy of the adjustment of the boiler drum position and avoid collision with obstacles in the hoisting channel during the boiler drum lifting process, thereby ensuring that the boiler drum is safely and stably positioned in a narrow construction space.

[0040] (3) The steel strand guide frame of the present invention can ensure that the steel strand discharged from the top of the hydraulic lifting assembly always remains vertical within a range of 1.5 meters. During the boiler drum hoisting process, the steel strand can run smoothly and avoid cross-knotting. In addition, the symmetrical triangular stable structure of the steel strand guide frame has sufficient strength and rigidity to bear the entire weight of the steel strand. The rollers provided on the steel strand guide frame can maintain rolling friction between the steel strand and the steel strand guide frame, and the resistance is relatively small.

[0041] (4) The longitudinal movable beam and the transverse movable beam in the support beam assembly of the present invention can be moved accordingly under the control of the weight shifter and the traction fall chain. During the boiler drum hoisting process, the force balance of the relevant components can be effectively guaranteed, and the steel strands can always be kept in a relatively vertical state, thereby avoiding the collision between the end of the boiler drum and the obstacles in the hoisting channel, and ensuring that the boiler drum is accurately positioned.

[0042] (5) The present invention adopts a double-hanging-point inclined lifting method, and performs corresponding trial lifting before lifting. During the lifting process, the position of the boiler drum is monitored in real time through the monitoring alarm component, which can effectively avoid the occurrence of accidents and has extremely high safety. In addition, during the lifting process, the suspended posture of the boiler drum can be accurately controlled so that the boiler drum can be quickly switched between a horizontal state and a vertical state. The lifting efficiency is high and collisions can be effectively avoided.

[0043] In summary, the present invention has a reliable structure, simple operation, and a high degree of automation. During the hoisting process, relevant components can be locked at any position to handle faults or close down for the night, etc. The hoisting process of the boiler drum is highly safe and stable, and the present invention is suitable for use in the hoisting of the boiler drum in a large thermal power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0046] Figure 2This is a schematic diagram of the structure of a hydraulic lifting assembly according to Embodiment 1 of the present invention;

[0047] Figure 3 A top view of the installation structure of the pre-hoisting device of Embodiment 2 of the present invention;

[0048] Figure 4 This is a schematic diagram of the hoisting process of Example 2 of the present invention;

[0049] In the figure: 1. Fixed support beam; 2. Longitudinal moving beam; 3. Horizontal moving beam; 4. Hydraulic lifting assembly; 5. Steel strand guide frame; 6. Horizontal lifting beam; 7. Steel strand; 8. First traction fall chain; 9. Pin shaft hanging plate; 10. Boiler drum; 11. Laser rangefinder; 12. Elevation locator; 13. Electronic theodolite; 14. Hydraulic pump station; 15. Electrical control cabinet; 16. Working surface operating platform. DETAILED DESCRIPTION

[0050] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and understand the present invention, and are not used to limit the present invention.

[0051] Example 1 An intelligent monitoring high-precision positioning drum hoisting device

[0052] like Figure 1 As shown, this embodiment includes a steel strand 7, a support beam assembly, a hydraulic lifting assembly 4, and a monitoring and alarm assembly. This embodiment measures the spatial verticality of the boiler drum 10 in real time through the monitoring and alarm assembly, and is not affected by the on-site weather or other human factors. During the hoisting process, it can provide a basis for the staff to adjust the position of the boiler drum 10, thereby ensuring the safety and stability of the boiler drum 10 hoisting process.

[0053] 1. Support beam assembly

[0054] The support beam assembly is the core support structure of the steam drum hoisting device, which is used to fix the hydraulic lifting assembly 4 and bear the entire weight of the boiler drum 10 during the hoisting process. In order to ensure that the steel strands 7 in the hydraulic lifting assembly 4 always remain in a vertical state when hoisting the boiler drum 10, the support beam assembly in this embodiment can drive the hydraulic lifting assembly 4 to move longitudinally and horizontally. The specific structure is as follows Figure 1 As shown, the support beam assembly includes at least two fixed support beams 1 fixed side by side on the boiler top plate beam layer, at least two longitudinal movable beams 2 fixed side by side on the slideways of the fixed support beams 1, and a transverse movable beam 3 fixed on the slideways of the longitudinal movable beams 2.

[0055] The fixed support beam 1 is used to bear the entire weight of the hydraulic lifting assembly 4 and the boiler drum 10, and a slideway is provided on the surface for the longitudinal movable beam 2 to move. Since the fixed support beam 1 is a basic support structure, in order to ensure the stability and reliability of the overall structure of the device, two fixed support beams 1 are provided in this embodiment.

[0056] The longitudinal movable beam 2 is used to realize the longitudinal movement of the hydraulic lifting assembly 4, and a slideway is provided on the surface for the transverse movable beam 3 to move. In this embodiment, the longitudinal movable beam 2 is fixed on the slideways of the two fixed support beams 1 through the first weight shifter, and the length direction of the longitudinal movable beam 2 is perpendicular to the length direction of the fixed support beam 1. Among them, the fixed support beam 1 is also provided with a first traction fall chain 8 for controlling the movement of the first weight shifter. In this embodiment, two longitudinal movable beams 2 are provided above the fixed support beam 1, and the longitudinal movable beam 2 and the fixed support beam 1 form a "well"-shaped structure.

[0057] The transverse moving beam 3 is used to realize the transverse movement of the hydraulic lifting assembly 4. In this embodiment, the transverse moving beam 3 is fixed on the slideways of the two longitudinal moving beams 2 through the second weight shifter, and the length direction of the transverse moving beam 3 is perpendicular to the length direction of the fixed support beam 1. The longitudinal moving beam 2 is also provided with a second traction fall chain for controlling the movement of the second weight shifter.

[0058] 2. Hydraulic lifting assembly 4 and steel strand 7

[0059] The hydraulic lifting assembly 4 is used as a power source for vertical lifting and is integrally fixed above the transverse moving beam 3. In this embodiment, the hydraulic lifting assembly 4 is a hydraulic lifting device in the prior art. Figure 2 As shown, the hydraulic lifting assembly 4 can anchor two groups of steel strands 7 and simultaneously lift the two groups of steel strands 7. In order to ensure that the steel strands 7 ejected from the top of the hydraulic lifting assembly 4 always remain vertical within a range of 1.5, a steel strand guide frame 5 is further provided above the hydraulic lifting assembly 4 in this embodiment, and the steel strand guide frame 5 is also fixedly arranged on the transverse moving beam 3.

[0060] like Figure 1 As shown, the steel strand guide frame 5 includes two symmetrical parts, which are connected by multiple sets of mutually intersecting reinforcing ribs, forming a stable structure of a symmetrical triangle as a whole. Each part of the steel strand guide frame 5 can support a group of steel strands 7 spit out from the top of the hydraulic lifting assembly 4, and each part of the steel strand guide frame 5 that contacts the steel strand 7 is provided with a roller to maintain rolling friction between the steel strand 7 and the steel strand guide frame 5, thereby reducing resistance.

[0061] In order to ensure the stability and safety of the hoisting process, in this embodiment, a transverse hoisting beam 6 that can move synchronously with the transverse moving beam 3 is further provided just above the hoisting point of the boiler drum 10. The transverse hoisting beam 6 is fixedly connected to the transverse moving beam 3 through a steel strand 7 above, and a pin shaft hanging plate 9 for connecting the boiler drum 10 is fixedly provided below the transverse hoisting beam 6.

[0062] 3. Monitoring and Alarm Components

[0063] The monitoring and alarm component is used to monitor the boiler drum 10 in real time during the hoisting process, and can provide data support for the staff to adjust the position of the boiler drum 10. The monitoring and alarm component includes a laser rangefinder 11, an elevation locator 12 and an electronic theodolite 13, and the laser rangefinder 11, the elevation locator 12 and the electronic theodolite 13 are electrically connected to the electrical control cabinet 15 on the working surface operation platform 16.

[0064] Specific as Figure 1 As shown, a laser rangefinder 11 is respectively provided at both ends of the boiler drum 10, for monitoring the distance between the boiler drum 10 and obstacles in the hoisting channel; an elevation locator 12 is respectively provided at both ends above the boiler drum 10, for monitoring the overall elevation, inclination angle and horizontality of the boiler drum 10 during the hoisting process. In this embodiment, the elevation locator 12 is a Beidou locator; an electronic theodolite 13 is fixedly provided below the fixed support beam 1 in the support beam assembly, for monitoring the side length error and vertical angle of obstacles in the hoisting channel.

[0065] Example 2 A method for tilting a boiler drum with two lifting points

[0066] This embodiment uses two sets of drum hoisting devices described in Example 1, and adopts a double-hanging-point inclined hoisting method to hoist the boiler drum 10. During the hoisting process, the position of the boiler drum 10 can be monitored in real time through the monitoring alarm group, which can effectively avoid accidents. The specific hoisting method is as follows:

[0067] Step S1: Assembly and installation of the drum hoisting device

[0068] a1. Use lifting machinery to install two sets of drum hoisting devices on both sides of the top of the boiler, and build a temporary working surface operation platform 16. Figure 3 As shown, a hydraulic pump station 14 connected to the hydraulic lifting component 4 and an electrical control cabinet 15 electrically connected to the monitoring alarm component are provided on the working surface operating platform 16;

[0069] a2. Then transport the steam drum to the lifting position of the boiler steel structure furnace, confirm the direction of the boiler drum 10, determine the center points of both ends of the steam drum, and draw the vertical and horizontal center lines on the outer surface of the boiler drum 10; then connect the pin shaft hanging plates 9 under the two sets of horizontal lifting beams 6 to one of the lifting ears of the boiler drum 10 respectively;

[0070] a3. After the assembly and installation of all components are completed, the hydraulic lifting assembly 4 is debugged, and the drum hoisting device is checked to see if it meets the lifting conditions. If it meets the lifting conditions, the trial lifting phase is entered.

[0071] Step S2: Trial lifting

[0072] b1. Control two sets of hydraulic lifting components 4 to synchronously lift the two lifting points of the boiler drum 10 by half the stroke of the hydraulic cylinder of the hydraulic lifting components 4 (about 100 mm), so that the boiler drum 10 leaves the temporary support device, and suspend the lifting for 15 minutes to observe whether the boiler drum 10 slides down, and check whether the drum lifting device works normally;

[0073] b2. After ensuring that the drum hoisting device is working properly, continue to control the two sets of hydraulic lifting components 4 to synchronously lift the two lifting points of the boiler drum 10 by two strokes (about 400 mm), and then lower them by one stroke to check whether the relevant control circuits in the drum hoisting device are working properly;

[0074] b3. After the above work is completed and confirmed to be correct, enter the formal lifting phase.

[0075] Step S3: Formal lifting

[0076] c1. Control the first group of hydraulic lifting components 4 through the electrical control cabinet 15 to lift a lifting point of the boiler drum 10 separately, so that the boiler drum 10 is tilted by 20° to 40°, ensuring that the total projected length of the boiler drum 10 is less than the clear distance between the main columns of the boiler furnace. Figure 4 Then the second traction fall chain is controlled to adjust the positions of the two sets of transverse moving beams 3 so that the steel strand 7 returns to a vertical state;

[0077] c2. Control the two groups of hydraulic lifting components 4 to synchronously lift the two lifting points of the boiler drum 10. When the high-position lifting point of the drum exceeds the actual elevation, suspend the lifting; then control the second group of hydraulic lifting components 4 to lift the low-position lifting point of the boiler drum 10, and at the same time control the first group of hydraulic lifting components 4 to lower the high-position lifting point of the boiler drum 10, and control the second traction fall chain to adjust the positions of the two groups of transverse moving beams 3 until the boiler drum 10 returns to a horizontal state at the in-place elevation;

[0078] c3. Control the first traction fall chain 8 to adjust the position of the longitudinal moving beam 2, and move the boiler drum 10 to the position; after the boiler drum 10 is lifted into place, install the drum suspension rod, then check the elevation of the boiler drum 10, and adjust the elevation by adjusting the nut of the drum suspension rod; before adjusting the nut, control the hydraulic lifting assembly 4 to lift the drum, and after the nut is adjusted, control the hydraulic lifting assembly 4 to zero load and then check the elevation of the boiler drum 10, and repeat this cycle until the elevation of the boiler drum 10 is adjusted to a predetermined value; finally, adjust the longitudinal and transverse center lines of the boiler drum 10, and after the adjustment is completed, fix the boiler drum 10 on a nearby steel structure, and the lifting operation of the boiler drum 10 is completed.

[0079] During step S3, the position of the boiler drum 10 is monitored in real time by the monitoring alarm component, and obstacles are avoided to ensure that the boiler drum 10 is safely installed. The specific operations are as follows:

[0080] d1. The laser rangefinder 11 in the monitoring alarm component monitors the distance between the boiler drum 10 and the obstacles in the hoisting channel, and transmits the data to the electrical control cabinet 15 in real time;

[0081] d2. At the same time, the elevation locator 12 in the monitoring alarm component monitors the overall elevation, inclination angle and horizontality of the boiler drum 10, and transmits the data to the electrical control cabinet 15 in real time;

[0082] d3. At the same time, the electronic theodolite 13 in the monitoring alarm component monitors the side length error and vertical angle of obstacles in the hoisting channel, and transmits the data to the electrical control cabinet 15 in real time;

[0083] d4. The electrical control cabinet 15 summarizes and processes the above data and displays it to the on-site operator through the control panel, providing a basis for the operator to adjust the position of the boiler drum 10 and ensure that the boiler drum 10 is safely in place.

[0084] It should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent monitoring high-precision positioning drum hoisting device, comprising a support beam assembly, a hydraulic lifting assembly fixed on the support beam assembly, and a steel strand anchored to the hydraulic lifting assembly; characterized in that: It also includes a monitoring and alarm component for real-time monitoring of the position of the boiler drum during the hoisting process; the monitoring and alarm component includes a laser rangefinder and an elevation locator both fixedly mounted at both ends of the boiler drum, and an electronic theodolite disposed below the support beam component, and the laser rangefinder, the elevation locator and the electronic theodolite are all electrically connected to the electrical control cabinet; A steel strand guide frame is also provided on the support beam assembly, and the steel strand guide frame is used to support the steel strand spitted out from the top of the hydraulic lifting assembly; A laser rangefinder is installed at each end of the boiler drum to monitor the distance between the boiler drum and obstacles in the lifting channel; an elevation locator is installed at each end above the boiler drum to monitor the overall elevation, inclination angle and horizontality of the boiler drum during the lifting process; an electronic theodolite is fixed under the support beam assembly to monitor the side length error and vertical angle of obstacles in the lifting channel.

2. The intelligent monitoring high-precision positioning drum hoisting device according to claim 1 is characterized in that: The support beam assembly includes at least two fixed support beams fixed side by side on the boiler top plate beam layer, at least two longitudinal movable beams fixed side by side on the fixed support beam slideway, and a transverse movable beam fixed on the longitudinal movable beam slideway; wherein the hydraulic lifting assembly and the steel strand guide frame are both fixed on the transverse movable beam.

3. The intelligent monitoring high-precision positioning drum hoisting device according to claim 2 is characterized in that: The longitudinal moving beam is fixed on the slideway of the fixed support beam through the first weight shifter, and the slideway of the fixed support beam is provided with a first traction fall chain for controlling the movement of the first weight shifter; the transverse moving beam is fixed on the longitudinal moving beam through the second weight shifter, and the longitudinal moving beam is provided with a second traction fall chain for controlling the movement of the second weight shifter.

4. The intelligent monitoring high-precision positioning drum hoisting device according to any one of claims 1 to 3, characterized in that: It also includes a transverse lifting beam which is arranged just above the boiler drum lifting point and is fixedly connected to the transverse moving beam through a steel strand.

5. The intelligent monitoring high-precision positioning drum hoisting device according to claim 4 is characterized in that: A pin-shaft hanging plate for connecting to the boiler drum is fixedly arranged below the transverse lifting beam.

6. A boiler drum double lifting point inclined lifting method, characterized in that: Using two sets of intelligent monitoring high-precision positioning drum hoisting devices as described in any one of claims 1 to 5, including the following steps performed in sequence: S1. Install two sets of drum hoisting devices on both sides of the top of the boiler respectively, debug the hydraulic lifting components, and check whether the drum hoisting devices meet the lifting conditions; S2. Control the drum hoisting device to test-lift the boiler drum and check whether the drum hoisting device and related control circuits are working properly; S3, control the drum hoisting device to tilt the boiler drum. During the tilt hoisting process, the position of the boiler drum is monitored in real time through the monitoring alarm component to avoid obstacles until the boiler drum is safely in place; In step S3, the monitoring process of the boiler drum by the monitoring alarm component is as follows: d1. The laser rangefinder in the monitoring alarm component monitors the distance between the boiler drum and obstacles in the lifting channel, and transmits the data to the electrical control cabinet in real time; d2. At the same time, the elevation locator in the monitoring alarm component monitors the overall elevation, inclination angle and horizontality of the boiler drum, and transmits the data to the electrical control cabinet in real time; d3. At the same time, the electronic theodolite in the monitoring alarm component monitors the side length error and vertical angle of obstacles in the lifting channel, and transmits the data to the electrical control cabinet in real time; d4. The electrical control cabinet aggregates and processes the above data and displays it to the on-site operators through the control panel.

7. The boiler drum double-hanging-point inclined hoisting method according to claim 6 is characterized in that: Step S2 includes the following steps which are performed in sequence: b1. Control two sets of hydraulic lifting components to synchronously lift the two lifting points of the boiler drum by half a stroke, and check whether the drum lifting device works normally; b2. After ensuring that the drum hoisting device is working properly, continue to control the two sets of hydraulic lifting components to synchronously lift the two lifting points of the boiler drum by two strokes, and then lower them by one stroke to check whether the relevant control circuits in the drum hoisting device are working properly; b3. After the above work is completed and confirmed to be correct, formal lifting will begin.

8. The boiler drum double-hanging-point inclined hoisting method according to claim 7 is characterized in that: In step S3, the tilting hoisting process of the boiler drum is as follows: c1. Control the first group of hydraulic lifting components to lift one lifting point of the boiler drum separately, so that the boiler drum is tilted by 20° to 40°, ensuring that the total projected length of the boiler drum is less than the clear distance between the main columns of the boiler furnace; c2. Control the second traction fall chain to adjust the position of the transverse moving beam to restore the steel strand to a vertical state; c3. Control two sets of hydraulic lifting components to synchronously lift the two lifting points of the boiler drum. When the high-position lifting point of the drum exceeds the actual elevation, the lifting is suspended; c4. Control the second set of hydraulic lifting components to lift the low-position lifting point of the boiler drum, and at the same time control the first set of hydraulic lifting components to lower the high-position lifting point of the boiler drum, and control the second traction fall chain to adjust the position of the transverse moving beam until the boiler drum returns to a horizontal state at the in-place elevation; c5. Control the first traction fall chain to adjust the position of the longitudinal moving beam and move the boiler drum to the in-place position; c6. After the boiler drum is hoisted into place, install the drum hoisting rod and control the two sets of hydraulic lifting components to fine-tune the elevation of the boiler drum until it reaches the preset value, thus completing the hoisting operation of the boiler drum.

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