CN-122009946-A - Cylinder lifting device for overhauling steam turbine

Abstract

The invention relates to the technical field of turbine overhaul, in particular to a cylinder lifting device for turbine overhaul, which comprises supporting columns, hydraulic jacking components, supporting beams and hanging components, wherein the supporting columns are arranged on two sides of a turbine cylinder, the hydraulic jacking components are arranged at the upper ends of the supporting columns, the supporting beams are erected on the tops of the hydraulic jacking components on two sides and span the turbine cylinder, the hanging components are arranged on the supporting beams and are connected with lifting lugs of the turbine cylinder, the hydraulic jacking components drive the supporting beams to lift the turbine cylinder, so that the turbine cylinder is lifted and separated from a front bearing box, the front bearing box is detached and overhauled under the condition that the turbine cylinder is not dismounted, the disturbance on a cylinder body in the traditional dismantling process is avoided, the overhauling efficiency is improved, and the safety risk is reduced.

Inventors

• ZHAO YANHAO

Assignees

• 南京钢铁股份有限公司

Dates

Publication Date

20260512

Application Date

20260331

Claims (8)

1. 1. The cylinder lifting device for the overhaul of the steam turbine is characterized by comprising a supporting upright post (1), a hydraulic jacking component (2), a supporting cross beam (3) and a hanging component (4) which is used for being connected with a lifting lug of a steam turbine cylinder (5); the support columns (1) are arranged on two sides of the steam turbine cylinder (5); the hydraulic jacking component (2) is arranged at the upper end of the supporting upright post (1); the supporting cross beam (3) is erected on the tops of the hydraulic jacking assemblies (2) at two sides and spans the steam turbine cylinder (5); The hanging assembly (4) is arranged on the supporting cross beam (3) and is connected with a lifting lug of the steam turbine cylinder (5); The hydraulic jacking assembly (2) drives the supporting cross beam (3) to ascend, so that the steam turbine cylinder (5) is lifted by the hanging assembly (4) and separated from the front bearing box, and the disassembly and maintenance of the front bearing box are completed under the condition that the steam turbine cylinder (5) is not disassembled.
2. 2. The cylinder lifting device for overhauling a steam turbine according to claim 1, wherein the supporting cross beam (3) is a combined beam structure formed by combining and connecting at least two H-shaped steels.
3. 3. The cylinder lifting device for overhauling a steam turbine according to claim 2 is characterized in that when in tailor-welding, webs of two H-shaped steels are parallel and wing plates are aligned for tailor-welding, and when in installation, the wing plates of the supporting cross beam (3) are installed on the supporting upright post (1) and the webs are arranged vertically.
4. 4. The cylinder lifting device for overhauling a steam turbine according to claim 1, wherein the hanging assembly (4) comprises an adjustable hanging ring (41) and a connecting support piece (42), one end of the adjustable hanging ring (41) is connected with a lifting lug of the steam turbine cylinder (5), and the other end of the adjustable hanging ring is arranged on the supporting beam (3) through the connecting support piece (42).
5. 5. The cylinder lifting device for overhauling a steam turbine according to claim 4, wherein the adjustable lifting ring (41) is U-shaped, threads are arranged at two ends of the adjustable lifting ring, and the adjustable lifting ring is slidably connected with the connecting support piece (42) through a nut and used for adjusting the hanging length.
6. 6. The cylinder lifting device for overhauling a steam turbine according to claim 5, wherein the connecting support piece (42) is pi-shaped, the connecting support piece (42) is clamped on the supporting beam (3) through a pi-shaped structure, and two ends of the U-shaped adjustable lifting ring (41) are respectively connected through two roots of the pi-shaped bottom.
7. 7. The cylinder lifting device for overhauling a steam turbine according to claim 1, wherein the supporting upright post (1) comprises a supporting steel pipe (11) at the middle part and supporting plates (12) arranged at the upper end and the lower end of the supporting steel pipe (11), the supporting plates (12) at the upper end are used for bearing a hydraulic jacking assembly (2), the supporting plates (12) at the lower end are used for being in contact with the ground for supporting, and the supporting steel pipe (11) and the supporting plates (12) are mutually welded and fixed to form an integral bearing structure.
8. 8. The cylinder lifting device for overhauling a steam turbine according to claim 1, wherein the hydraulic lifting assembly (2) is a hydraulic jack, the bottom of the hydraulic jack is fixedly connected with the supporting upright post (1), and the ejector rod on the hydraulic jack is connected with the supporting cross beam (3).

Description

Cylinder lifting device for overhauling steam turbine Technical Field The invention relates to the technical field of steam turbine overhaul, in particular to a cylinder lifting device for steam turbine overhaul. Background According to the maintenance standard and specification, the steam turbine of the power plant needs to be regularly checked and overhauled without a gap, and levelness measurement and adjustment are often required to be carried out on a bearing box of a cylinder during overhauling, and particularly, a front bearing box also bears the supporting and expansion sliding functions of the cylinder. If the sliding pin, the sizing block and the foundation at the bottom of the front bearing box are in a problem, when the bearing box needs to be removed, the cylinder of the steam turbine needs to be removed, and then the operation of lifting out the front bearing box can be performed. The lower cylinder of the steam turbine is welded and connected with more steam extraction pipelines, drainage pipelines and the like, the workload is huge according to a dismantling method, and the general overhaul period is increased from 30 days to more than 60 days, so that great manpower and material resources are wasted and the generated energy is influenced. Therefore, the invention needs to provide a temporary cylinder supporting device for steam turbine overhaul, which can realize that a front bearing box can be lifted out for overhaul and maintenance without dismantling a steam turbine cylinder body. Disclosure of Invention The invention aims to provide a cylinder lifting device for overhauling a steam turbine, so as to realize the safe disassembly and overhauling of a front bearing box without dismantling a cylinder. In order to achieve the technical purpose, the invention provides the following technical scheme: the invention provides a cylinder lifting device for overhauling a steam turbine, which comprises a supporting upright post, hydraulic lifting assemblies, supporting beams and hanging assemblies, wherein the hanging assemblies are used for being connected with lifting lugs of the steam turbine cylinder, the supporting upright post is arranged on two sides of the steam turbine cylinder, the hydraulic lifting assemblies are arranged at the upper ends of the supporting upright post, the supporting beams are erected on the tops of the hydraulic lifting assemblies on the two sides and transversely span the steam turbine cylinder, and the hanging assemblies are arranged on the supporting beams and are connected with the lifting lugs of the steam turbine cylinder. According to the invention, the hydraulic lifting assembly drives the supporting beam to lift, so that the steam turbine cylinder is lifted by the hanging assembly and separated from the front bearing box, and the disassembly and maintenance of the front bearing box are completed under the condition that the steam turbine cylinder is not disassembled. Preferably, the supporting cross beam is a combined beam structure formed by combining and connecting at least two H-shaped steels. Furthermore, when in splice welding, webs of the two H-shaped steels are parallel and wing plates are aligned for splice welding, and when in installation, the wing plates of the supporting cross beam are installed on the supporting upright posts and the webs are vertically arranged. Preferably, the hanging assembly comprises an adjustable hanging ring and a connecting support piece, one end of the adjustable hanging ring is connected with the lifting lug of the steam turbine cylinder, and the other end of the adjustable hanging ring is installed on the supporting cross beam through the connecting support piece. Further preferably, the adjustable hanging ring is U-shaped, two ends of the adjustable hanging ring are provided with threads, and the adjustable hanging ring is in sliding connection with the connecting support piece through a nut and is used for adjusting hanging length. Furthermore, the connecting support piece is pi-shaped, is clamped on the supporting cross beam through a pi-shaped structure, and is respectively connected with two ends of the U-shaped adjustable hanging ring through two roots of the pi-shaped bottom. Preferably, the supporting upright post comprises a supporting steel pipe in the middle and supporting plates arranged at the upper end and the lower end of the supporting steel pipe, the supporting plate at the upper end is used for bearing the hydraulic jacking assembly, the supporting plate at the lower end is used for being in contact with the ground for supporting, and the supporting steel pipe and the supporting plate are mutually welded and fixed to form an integral bearing structure. Preferably, the hydraulic jacking component is a hydraulic jack, the bottom of the hydraulic jack is fixedly connected with the supporting upright post, and the ejector rod on the hydraulic jack is connected with the supporting cross beam. The beneficial