Hoisting construction process for lower half cylinder and high and medium pressure cylinder of gas turbine

Abstract

The invention discloses a hoisting construction process for a lower half cylinder and a high-medium-pressure cylinder of a gas turbine, relates to the technical field of gas power generation equipment installation, and aims to solve the problems of insufficient equipment bearing, poor precision, large potential safety hazard, low construction efficiency and the like in the hoisting process of gas turbine parts in a traditional hoisting process. The process comprises the following steps: S1, construction preparation: mounting and accepting related foundations in a main power house, cleaning sundries at a steam engine room access hole and a 15m-layer platform hoisting channel, and arranging protection facilities; selecting proper hoisting equipment and matched machine tools and materials, and checking and maintaining; building a construction team, requiring special work types to work with certificates, and carrying out technical training and safety disclosure on all personnel; s2, a hoisting system is installed and debugged, specifically, the hoisting system is built, specifically, 12 m double beams are placed, a hydraulic lifting device is installed, a steel strand penetrates through the hydraulic lifting device, an anchor head sling and a steel wire rope are connected, a pump station is arranged, and a line is connected. The method has the advantage of improving the construction precision, safety and construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of gas power generation equipment installation, and more specifically to a construction process for hoisting the lower half and high and medium pressure cylinders of a gas turbine. Background Art

[0002] In the field of gas-fired power generation project construction, hoisting the lower half of the gas turbine and the high and medium pressure cylinders is an extremely challenging task. With the development of gas-fired power generation technology, the scale and capacity of gas turbines have continued to increase, and the size and weight of their lower half and high and medium pressure cylinders have also increased significantly.

[0003] When faced with large gas turbine components, conventional lifting equipment cannot meet the lifting requirements of the lower half of the gas turbine and the high and medium pressure cylinders, resulting in the inability to directly carry out lifting operations. Additional equipment assistance or complex modifications to existing equipment are required, which not only increases costs but also prolongs the construction period. In addition, the accuracy of traditional equipment is difficult to guarantee. During the lifting process, components are prone to shaking and offsetting, making it difficult to accurately control the position of gas turbine components, affecting the installation quality and possibly causing the gas turbine to malfunction in subsequent operation. In view of this, we propose a lifting construction process for the lower half of the gas turbine and the high and medium pressure cylinders. Summary of the Invention

[0004] The purpose of the present invention is to provide a construction process for hoisting the lower half and high and medium pressure cylinders of a gas turbine, aiming to solve the problems of insufficient equipment load, poor precision, great safety hazards and low construction efficiency in the traditional hoisting process during the hoisting of gas turbine components.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a construction process for hoisting the lower half and high and medium pressure cylinders of a gas turbine, the process comprising the following steps:

[0006] S1: Construction preparation: Conduct installation acceptance of relevant foundations in the main powerhouse, clean up debris at the turbine room inspection opening and the 15m-level platform hoisting passage, and install protective facilities;

[0007] Select appropriate lifting equipment and supporting machinery and materials, and inspect and maintain them;

[0008] Establish a construction team, require special workers to hold certification, and provide technical training and safety briefings to all personnel;

[0009] S2: Hoisting system installation and commissioning: Building the hoisting system, including placing the 12m double beams, installing the hydraulic lifting device and threading the steel strands, connecting the anchor head spreader and wire rope, arranging the pump station and connecting the lines;

[0010] Carry out hard merging of the cranes and connect the hoisting balance beam;

[0011] Carry out no-load commissioning of the hydraulic lifting device;

[0012] S3: Equipment Hoisting: The lower half of the gas turbine and the high and medium pressure cylinders are hoisted separately, including hanging ropes, pre-tightening steel strands, pre-hoisting inspections, equipment hoisting, equipment translation and positioning operations, and monitoring and adjusting equipment status during the hoisting process;

[0013] S4: Dismantle the hoisting system: After the equipment is hoisted, disconnect the equipment from the hoisting system, remove the crane and the vehicle paralleling device, remove and organize the relevant parts of the hydraulic lifting device, dismantle the lifting balance beam, and clean up the site;

[0014] S5: Construction safety assurance: Establish a safety management system, clarify responsibilities, operating procedures and inspection system;

[0015] Set up safety protection facilities and regularly inspect and maintain construction equipment and tools;

[0016] Establish a safety risk monitoring and early warning mechanism, formulate emergency plans, and conduct regular drills.

[0017] Preferably, in the above step S1, the foundation installation acceptance includes checking the flatness and levelness of the table plate and the bearing seat to ensure that they meet the equipment placement requirements, and conducting a comprehensive inspection and debugging of the selected lifting equipment such as the crane and the hydraulic lifting device to ensure normal performance.

[0018] Preferably, in the above step S2, the hydraulic lifting device adopts a bottom-up threading process when threading the steel strands, with 7 steel strands threaded in each group and alternately threaded left and right. The steel strand specification is 15.2mm, and the two hydraulic lifting devices are 4900mm apart on the 12m beam and eccentrically arranged on the shoulder beam.

[0019] Preferably, in the above step S3, the pre-lifting inspection includes inspecting the deformation of the crane main beam, the hydraulic lifting system, the sling, and the shoulder beam, as well as the braking performance of the crane main hook and the travel drive mechanism;

[0020] During the lifting process, the lifting speeds of the two hydraulic lifting devices are strictly monitored. If there is any asynchrony, the lifting is suspended and leveled before the entire device is lifted.

[0021] Preferably, in the above step S4, when removing the relevant components of the hydraulic lifting device, first remove the data cable and oil pipe and pack them separately, then use the crane to lift the hydraulic lifting device together with the steel strand, anchor head, and wire rope out of the lifting balance beam, pull the lower end of the steel strand out of the anchor head, and then put the hydraulic lifting device back on the lifting balance beam, and the construction workers stand on the balance beam to pull out the steel strands one by one and coil them into circles of specified sizes.

[0022] Preferably, in the above step S5, the safety inspection system in the safety management system stipulates that a comprehensive inspection of the construction site is carried out regularly, and the inspection content includes the integrity of safety protection facilities, the standardization of construction personnel's operations, and the safety of construction equipment and tools;

[0023] Safety education and training are organized regularly to strengthen the safety awareness of construction workers through case analysis and safety knowledge explanation.

[0024] Preferably, in the above step S1, the prepared measuring instruments include a steel tape measure and a level, and the measuring instruments are calibrated and qualified;

[0025] The safety supplies prepared include seat belts, differentials, horizontal ropes, tool bags, and warning tapes, and the safety supplies are of qualified quality.

[0026] Preferably, in the above-mentioned step S5, the parameters monitored in the safety risk monitoring and early warning mechanism include the deflection of the main beam of the crane, the pressure of the hydraulic lifting device, the wind speed, etc. When the parameters exceed the early warning value, the control center immediately issues an alarm, and the construction personnel take measures such as stopping operations and adjusting equipment in accordance with the emergency plan.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention adopts a dual-machine lifting method combined with a hydraulic lifting device, and accurately controls each link during the construction process. For example, during the lifting, translation and positioning of the equipment, the position and levelness of the equipment are strictly monitored and adjusted, which effectively improves the lifting accuracy of the lower half of the gas turbine and the high and medium pressure cylinders, ensures that the equipment installation position meets the design requirements, and lays a solid foundation for the subsequent stable operation of the gas turbine.

[0029] 2. The present invention greatly enhances the safety and reliability of the construction process by improving the safety management system, comprehensive safety protection facilities and effective safety risk monitoring and early warning mechanism. Clear safety responsibilities and standardized safety operating procedures enable construction personnel to operate in strict accordance with the requirements. Regular safety education and training improves the safety awareness and emergency response capabilities of construction personnel. The installation of safety protection facilities effectively prevents accidents such as people falling and objects being hit. The safety risk monitoring and early warning mechanism can timely discover and deal with potential safety hazards, ensuring that the construction process is always in a safe and controllable state.

[0030] 3. The present invention significantly improves construction efficiency by optimizing the construction process and efficient equipment combination. In the construction preparation stage, sufficient preparation work ensures the smooth progress of the construction process. The rapid installation and debugging of the hoisting system reduces the preparation time before construction. During the hoisting process, the coordinated operation between various equipment and precise command and dispatch avoid operational errors and duplication of work, so that the hoisting operation can be carried out efficiently and orderly, effectively shortening the construction period and reducing project costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the process flow in the present invention. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] Example 1

[0034] like Figure 1 As shown: In terms of equipment and material preparation, the construction personnel selected a crane in accordance with the requirements of the construction plan, and conducted a comprehensive inspection and debugging on it to ensure that the performance indicators of the crane were normal. At the same time, two hydraulic lifting devices and construction machinery were prepared, and all machinery was inspected in detail to ensure that there was no damage or defects. Maintenance and anti-corrosion treatment were carried out, and the measuring instruments were fully equipped and of qualified quality.

[0035] A construction team is formed with clear division of labor among personnel in various positions. All special workers are required to hold certificates before taking up their posts. Technical training and safety briefings are provided to all construction personnel before construction to ensure that everyone is familiar with the construction process and safety precautions.

[0036] The construction workers carefully placed the 12m double beam above the inspection port so that it accurately spanned the inspection port, and placed thin wooden boards at the contact point with the floor slab. They used a crane to steadily lift the hydraulic lifting device onto the steel strand support frame. Strictly following the bottom-up cable threading process, each set of hydraulic lifting devices passed through 7 steel strands, alternating left and right rotations. After threading, a rope clip was inserted into the upper end of the steel cable. After pulling a horizontal safety rope on the 12m lifting balance beam, the hydraulic lifting device was lifted and hung on the balance beam. The position was adjusted and rubber pads were placed. According to the design dimensions, two suspended hydraulic lifting devices were accurately arranged on the 12m beam, 4900mm apart and eccentrically arranged.

[0037] At the inspection port, construction workers accurately placed the anchor head, special slings and lifting wire ropes, inserted the steel strands into the corresponding holes of the anchor head one by one and tightened the pressure plate bolts. They started the hydraulic lifting device to lift the anchor head. When the height of the anchor head and the pin hole of the special sling were consistent, they used a long pin shaft to connect and adjust the anchor head to the center position, and then hung the corresponding wire rope. Next, the hydraulic lifting device pump station was arranged near the inspection port of the 15m operating floor platform. After power was supplied, the motor steering and the opening and closing claw movements were checked to ensure normal operation.

[0038] The two cranes were hard-coupled and the center distance was adjusted to 10.5m. The anti-collision buffer rubber heads of the end beams were removed and the I-beams were connected by flanges to synchronize them. After the wire rope loop was hung on the crane hook, the crane was directed to move above the lifting balance beam, the pin connection with the balance beam lifting ear was completed, and the balance beam was lifted to the specified height. Finally, the hydraulic lifting device was debugged with no-load, lifted and lowered for 3 strokes each, and the components were checked to ensure there were no abnormalities.

[0039] After the lower half of the engine is transported to the lifting position of the inspection port, operate the hydraulic lifting device to adjust the height of the wire rope and connect it to the engine hanging plate and shackle to make it slightly stressed, pre-tighten the steel strand to ensure uniform stress, command the hydraulic lifting device to slowly lift the lower half of the engine 100mm away from the vehicle plate and let it stand for 10 minutes, comprehensively check the deformation of the main beam of the crane, hydraulic lifting system and other components, and after confirming that there is no abnormality, tighten the lower anchor head pressure plate bolts for the second time, then check the main hook brake and travel drive mechanism of the crane. After passing the inspection, operate two hydraulic lifting devices to synchronously lift the lower half of the engine, and strictly monitor the process. Increase the lifting speed and ensure synchronization. When the anchor head is 500mm away from the bottom of the suspension frame, close the upper and lower anchors and lock the safety seat. At the same time, assign a special person to monitor the status of each component of the hydraulic lifting device. Add and retract the anchor on the back of the claw every 5m. The commander pays close attention to the horizontality of the equipment to ensure the accurate position of the lifting point. When the lower half of the gas turbine is lifted to the bottom 300mm higher than the 15m platform, stop lifting, command the trolley and truck to lift it to the top of the positioning foundation, and then command the main hook of the crane to descend. Pause when the distance between the equipment base and the table surface is 200mm, use adjustment to find the positioning center, and finally complete the positioning.

[0040] When hoisting the high and medium pressure cylinders, first move the hydraulic lifting devices on both sides to the middle accurately by 775mm. The subsequent process is basically the same as the hoisting of the lower half of the gas turbine. During the entire hoisting process, all parameters are strictly controlled to ensure safe and accurate hoisting.

[0041] After the equipment is hoisted into place, the wire rope is disconnected from the equipment, and the two cranes are driven to the top of the maintenance port. The main hook is lowered to lower the lifting balance beam, and the wire rope connecting the crane main hook and the balance beam is removed. The I-beam connecting the two cranes is removed to restore the crane to normal operation. The hydraulic lifting device together with the steel strand, anchor head, and wire rope are hoisted out of the lifting balance beam using the crane, and the lower end of the steel strand is pulled out from the anchor head. The hydraulic lifting device together with the steel strand is then put back onto the lifting balance beam. The construction workers stand on the lifting balance beam, and then hoist the hydraulic lifting device out of the lifting balance beam, disassemble the various components of the lifting balance beam, classify the tools and equipment, load them onto trucks, and clean up the work site to complete the dismantling of the entire lifting system.

[0042] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A construction process for hoisting the lower half and high and medium pressure cylinders of a gas turbine, characterized in that: The process The following steps are involved: S1: Construction preparation: Conduct installation acceptance of relevant foundations in the main powerhouse, clean up debris at the turbine room inspection opening and the 15m-level platform hoisting passage, and install protective facilities; Select appropriate lifting equipment and supporting machinery and materials, and inspect and maintain them; Establish a construction team, require special workers to hold certification, and provide technical training and safety briefings to all personnel; S2: Hoisting system installation and commissioning: Building the hoisting system, including placing the 12m double beams, installing the hydraulic lifting device and threading the steel strands, connecting the anchor head spreader and wire rope, arranging the pump station and connecting the lines; Carry out hard merging of the cranes and connect the hoisting balance beam; Carry out no-load commissioning of the hydraulic lifting device; S3: Equipment Hoisting: The lower half of the gas turbine and the high and medium pressure cylinders are hoisted separately, including hanging ropes, pre-tightening steel strands, pre-hoisting inspections, equipment hoisting, equipment translation and positioning operations, and monitoring and adjusting equipment status during the hoisting process; S4: Dismantle the hoisting system: After the equipment is hoisted, disconnect the equipment from the hoisting system, remove the crane and the vehicle paralleling device, remove and organize the relevant parts of the hydraulic lifting device, dismantle the lifting balance beam, and clean up the site; S5: Construction safety assurance: Establish a safety management system, clarify responsibilities, operating procedures and inspection system; Set up safety protection facilities and regularly inspect and maintain construction equipment and tools; Establish a safety risk monitoring and early warning mechanism, formulate emergency plans, and conduct regular drills.

2. A construction process for hoisting the lower half and high and medium pressure cylinders of a gas turbine according to claim 1, characterized in that: In the above step S1, the foundation installation acceptance includes checking the flatness and levelness of the table and bearing seat to ensure that they meet the equipment placement requirements, and conducting a comprehensive inspection and debugging of the selected lifting equipment such as cranes and hydraulic lifting devices to ensure normal performance.

3. The process for hoisting the lower half and high and medium pressure cylinders of a gas turbine according to claim 1 is characterized in that: In the above step S2, the hydraulic lifting device adopts the threading process from bottom to top when threading the steel strands. Each group has 7 steel strands and they are threaded alternately left and right. The steel strand specification is 15.2mm. The two hydraulic lifting devices are 4900mm apart on the 12m beam and are eccentrically arranged on the shoulder beam.

4. A construction process for hoisting the lower half and high and medium pressure cylinders of a gas turbine according to claim 1, characterized in that: In the above step S3, the pre-lifting inspection includes checking the deformation of the crane main beam, hydraulic lifting system, slings, and shoulder beam, as well as the braking performance of the crane main hook and the travel drive mechanism; During the lifting process, the lifting speeds of the two hydraulic lifting devices are strictly monitored. If there is any asynchrony, the lifting is suspended and leveled before the entire device is lifted.

5. The process for hoisting the lower half and high and medium pressure cylinders of a gas turbine according to claim 1 is characterized in that: In the above step S4, when removing the relevant components of the hydraulic lifting device, first remove the data cable and oil pipe and pack them separately, then use the crane to lift the hydraulic lifting device together with the steel strand, anchor head, and wire rope from the lifting balance beam, pull the lower end of the steel strand out of the anchor head, and then put the hydraulic lifting device back on the lifting balance beam. The construction workers stand on the balance beam to pull out the steel strands one by one and coil them into circles of specified size.

6. The process for hoisting the lower half and high and medium pressure cylinders of a gas turbine according to claim 1 is characterized in that: In the above step S5, the safety inspection system in the safety management system stipulates that the construction site should be regularly inspected. The inspection content includes the integrity of safety protection facilities, the standardization of construction personnel's operations, and the safety of construction equipment and tools. Safety education and training are organized regularly to strengthen the safety awareness of construction workers through case analysis and safety knowledge explanation.

7. The process for hoisting the lower half and high and medium pressure cylinders of a gas turbine according to claim 1 is characterized in that: In the above step S1, the prepared measuring instruments include a steel tape measure and a level, and the measuring instruments are calibrated and qualified; The safety supplies prepared include seat belts, differentials, horizontal ropes, tool bags, and warning tapes, and the safety supplies are of qualified quality.

8. The process for hoisting the lower half and high and medium pressure cylinders of a gas turbine according to claim 1 is characterized in that: In the above step S5, the parameters monitored in the safety risk monitoring and early warning mechanism include the deflection of the main beam of the crane, the pressure of the hydraulic lifting device, the wind speed, etc. When the parameters exceed the early warning value, the control center immediately issues an alarm, and the construction personnel take measures such as stopping operations and adjusting equipment in accordance with the emergency plan.

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