阅读说明：本技术 一种汽轮机隔板检修支撑装置 (Steam turbine baffle overhauls strutting arrangement ) 是由 许准 薛彦春 赵勇 陈亮 柴广 曹亮亮 余浩 王仁昌 别国泰 于 2020-12-31 设计创作，主要内容包括：本发明属于机械设备检修技术领域,具体涉及一种汽轮机隔板检修支撑装置。本发明包括竖板、固定螺钉、加强肋板、方管、PP板、不锈钢花纹板、吊耳孔、角铁、支撑板,所述方管、角铁通过焊接构成底部基础框架,不锈钢花纹板通过焊接固定在底部基础框架上表面,竖板、加强肋板、支撑板通过焊接与基础框架连接,组成支撑部分；竖板上加工有螺纹通孔,固定螺钉安装在竖板上的螺纹通孔中,PP板粘贴在支撑板顶面,方管上加工有吊耳孔。本发明结构简单、操作简单、维护方便；上半隔板套吊出后无需翻身即可直接放置在隔板架上,提高了吊装效率,降低了吊装风险。(The invention belongs to the technical field of mechanical equipment maintenance, and particularly relates to a steam turbine partition plate maintenance supporting device. The invention comprises a vertical plate, a fixing screw, a reinforcing rib plate, a square tube, a PP plate, a stainless steel pattern plate, a lug hole, angle iron and a support plate, wherein the square tube and the angle iron form a bottom foundation framework through welding; the riser is processed with the screw thread through-hole, and during set screw installed the screw thread through-hole on the riser, the PP board was pasted on the backup pad top surface, and processing has the lug hole on the side pipe. The invention has simple structure, simple operation and convenient maintenance; after the upper half clapboard sleeve is hung out, the upper half clapboard sleeve can be directly placed on the clapboard frame without turning over, so that the hoisting efficiency is improved, and the hoisting risk is reduced.)

1. The utility model provides a steam turbine baffle overhauls strutting arrangement which characterized in that: the device comprises a low-pressure 1-7-stage upper partition plate supporting device, wherein 6-stage and 7-stage upper partition plates are placed in a left side neutral gear, and 1-5-stage upper partition plates are placed in a right side neutral gear; the low-pressure 8-10-stage upper partition supporting device is characterized in that a 9-stage upper partition is placed in a left neutral gear, an 8-stage upper partition is placed in a middle neutral gear, and a 10-stage upper partition is placed in a right neutral gear; the low-pressure 1-7-stage lower partition plate supporting device is characterized in that 6-stage and 7-stage lower partition plates are placed in a left side neutral gear, and 1-5-stage lower partition plates are placed in a right side neutral gear; the low-pressure lower partition plate supporting device comprises a low-pressure lower partition plate supporting device of 8-10 levels, a lower partition plate of 9 levels is placed in a left neutral gear, a lower partition plate of 8 levels is placed in a middle neutral gear, and a lower partition plate of 10 levels is placed in a right neutral gear.

2. The steam turbine diaphragm service support apparatus of claim 1, wherein: the low-pressure 1-7 level upper partition plate supporting device, the low-pressure 8-10 level upper partition plate supporting device, the low-pressure 1-7 level lower partition plate supporting device and the low-pressure 8-10 level lower partition plate supporting device respectively comprise a vertical plate, a fixing screw, a reinforcing rib plate, a square tube, a PP plate, a stainless steel pattern plate, a lug hole, angle iron and a supporting plate.

3. The steam turbine diaphragm service support apparatus of claim 2, wherein: the square tubes and the angle iron form a bottom foundation framework through welding, the stainless steel pattern plate is fixed on the upper surface of the bottom foundation framework through welding, and the vertical plate, the reinforcing rib plate and the supporting plate are connected with the foundation framework through welding to form a supporting part; the riser is processed with the screw thread through-hole, and during set screw installed the screw thread through-hole on the riser, the PP board was pasted on the backup pad top surface, and processing has the lug hole on the side pipe.

4. The steam turbine diaphragm service support apparatus of claim 3, wherein: the interval of adjacent riser slightly is greater than corresponding baffle part axial thickness, and the riser height is greater than lower baffle centre of gravity height.

5. The steam turbine diaphragm service support apparatus of claim 3, wherein: the supporting plate is used for supporting the partition plate components, wherein the supporting surface of the 1-5-stage partition plate component placing position is a plane; 6. the height of the supporting surface of the placing position of the 7-level clapboard part is staggered, and the height difference is equal to the height difference of the high and low planes of the middle division surface of the clapboard.

6. The steam turbine diaphragm service support apparatus of claim 5, wherein: the contact area of the median plane and the supporting plate is more than 90 percent after the clapboard is placed.

7. The steam turbine diaphragm service support apparatus of claim 2, wherein: the gap allowing one person to pass through is arranged, and the minimum ground clearance of the middle section of the upper partition plate is larger than the maximum arc length of the steam seal block.

Technical Field

The invention belongs to the technical field of mechanical equipment maintenance, and particularly relates to a steam turbine partition plate maintenance supporting device.

Background

The steam turbine is also called as a steam turbine engine, and is a rotary steam power device.A high-temperature high-pressure steam passes through a fixed nozzle to become an accelerated airflow and then is sprayed onto blades, so that a rotor provided with the blades rotates and does work outwards. The steam turbine has wide application and is main equipment for modern thermal power stations, nuclear power stations, biomass power generation and the like.

A certain type of steam turbine is provided with a single-shaft four-cylinder six-exhaust reheating condensing type, power of 1,127,000kW (before capacity expansion)/1176000 kW (after capacity expansion), rotating speed of 1500 rpm and frequency of 50Hz, three positive and negative 10-grade low-pressure rotors and a high-pressure rotor are arranged, the single weight of the 1# low-pressure rotor is 164T, the single weight of the 2# low-pressure rotor is 179T, the single weight of the 3# low-pressure rotor is 182T, and the single weight of the high-pressure rotor is 75T. The low pressure rotor last stage blade diameter is 5550mm, and the high pressure rotor last stage blade diameter is 2242.6 mm.

The steam turbine has the advantages of good starting performance, high efficiency, simple operation, safe operation and the like, thereby being widely applied to the industries of thermal power generation, nuclear power generation and biomass energy power generation and having good operation performance.

The diaphragm is a key part of the most basic working unit for completing energy conversion in the through flow of the steam turbine and consists of a static blade, an outer ring and an inner ring. The low-pressure cylinder of the steam turbine of the nuclear power unit has the basic characteristics of low steam parameter, large volume flow and the like, so that the partition plate sleeve is large in size and heavy in weight. Taking this type of steam turbine as an example, the upper half of the low pressure steam chamber is about 15 tons, the size is about 1388 × 4858 × 2429mm, the upper half of the low pressure final stage diaphragm is about 10.2 tons, and the size is about 360 × 5024 × 2512mm, so that there is a great industrial safety risk during maintenance and hoisting, and much maintenance space is occupied during lying. The 1-5 stage partition boards are combined into one part, and the horizontal middle section of the partition board is a plane; 6. the 7-level partition plate is combined into a component, and the horizontal middle split surface of the component consists of a high plane and a low plane; the 8-stage, 9-stage and 10-stage partition plates are respectively and independently a component, and the horizontal middle planes of the partition plates are respectively composed of a high plane and a low plane. The inner ring of each stage of clapboard is provided with a channel along the circumferential direction, and the steam seal block slides into the channel from the middle section and is arranged in the channel. The steam seal block is in a circular arc section shape, and a circle of steam seal is composed of a plurality of steam seal blocks.

Disclosure of Invention

The invention aims to provide a steam turbine partition plate overhauling and supporting device aiming at the problems that a steam turbine partition plate sleeve of a nuclear power unit is large in size and heavy in weight, large industrial safety risks exist during overhauling and hoisting, a large overhauling space is occupied when the steam turbine partition plate sleeve is placed in a lying state, and the like.

The technical scheme adopted by the invention is as follows:

a steam turbine partition board overhauling and supporting device comprises a low-pressure 1-7-stage upper partition board supporting device, wherein 6-7-stage upper partition boards are placed in a left side neutral gear, and 1-5-stage upper partition boards are placed in a right side neutral gear; the low-pressure 8-10-stage upper partition supporting device is characterized in that a 9-stage upper partition is placed in a left neutral gear, an 8-stage upper partition is placed in a middle neutral gear, and a 10-stage upper partition is placed in a right neutral gear; the low-pressure 1-7-stage lower partition plate supporting device is characterized in that 6-stage and 7-stage lower partition plates are placed in a left side neutral gear, and 1-5-stage lower partition plates are placed in a right side neutral gear; the low-pressure lower partition plate supporting device comprises a low-pressure lower partition plate supporting device of 8-10 levels, a lower partition plate of 9 levels is placed in a left neutral gear, a lower partition plate of 8 levels is placed in a middle neutral gear, and a lower partition plate of 10 levels is placed in a right neutral gear.

The low-pressure 1-7 level upper partition plate supporting device, the low-pressure 8-10 level upper partition plate supporting device, the low-pressure 1-7 level lower partition plate supporting device and the low-pressure 8-10 level lower partition plate supporting device respectively comprise a vertical plate, a fixing screw, a reinforcing rib plate, a square tube, a PP plate, a stainless steel pattern plate, a lug hole, angle iron and a supporting plate.

The square tubes and the angle iron form a bottom foundation framework through welding, the stainless steel pattern plate is fixed on the upper surface of the bottom foundation framework through welding, and the vertical plate, the reinforcing rib plate and the supporting plate are connected with the foundation framework through welding to form a supporting part; the riser is processed with the screw thread through-hole, and during set screw installed the screw thread through-hole on the riser, the PP board was pasted on the backup pad top surface, and processing has the lug hole on the side pipe.

The interval of adjacent riser slightly is greater than corresponding baffle part axial thickness, and the riser height is greater than lower baffle centre of gravity height.

The supporting plate is used for supporting the partition plate components, wherein the supporting surface of the 1-5-stage partition plate component placing position is a plane; 6. the height of the supporting surface of the placing position of the 7-level clapboard part is staggered, and the height difference is equal to the height difference of the high and low planes of the middle division surface of the clapboard.

The contact area of the median plane and the supporting plate is more than 90 percent after the clapboard is placed.

The gap allowing one person to pass through is arranged, and the minimum ground clearance of the middle section of the upper partition plate is larger than the maximum arc length of the steam seal block.

Compared with the prior art, the invention has the beneficial effects that:

1. the clapboard overhauling and supporting device has simple structure, simple operation and convenient maintenance;

2. the partition board overhauling and supporting device is welded by high-strength steel, so that the partition board overhauling and supporting device is high in strength, free of deformation risk and excellent in safety performance;

3. when the clapboard overhauling and supporting device is used, the upper half clapboard sleeve can be directly placed on the clapboard frame without turning over after being lifted out, so that the hoisting efficiency is improved, and the hoisting risk is reduced;

4. when the clapboard sleeve is placed at any position of the clapboard overhauling and supporting device, the clapboard frame can be ensured to be stable without deflection or toppling;

5. the partition board overhauling and supporting device has enough space for steam seal block dismounting and cleaning, polishing and checking the surface of the partition board sleeve, has good man-machine interaction performance, and improves overhauling efficiency;

6. the contact area between the partition plate overhauling and supporting device and the ground is large, so that the partition plate overhauling and supporting device can still meet the bearing requirement of the steam turbine platform after being fully loaded, and meanwhile, the ground of the steam turbine platform is prevented from being damaged;

7. the baffle plate overhauling and supporting device has a compact structure, and is small in size and occupied area under the condition of ensuring enough strength and safety margin.

Drawings

FIG. 1 is a front view of a low pressure 1-7 stage upper diaphragm support

FIG. 2 is a plan view of a low pressure 1-7 stage upper diaphragm support

FIG. 3 is a front view of a low pressure 8-10 stage upper diaphragm support

FIG. 4 is a top view of a low pressure 8-10 stage upper diaphragm support

FIG. 5 is a front view of a low pressure 1-7 stage lower diaphragm support

FIG. 6 is a top view of a low pressure 1-7 stage lower diaphragm support

FIG. 7 is a front view of a low pressure 8-10 stage lower diaphragm support

FIG. 8 is a top view of a low pressure 8-10 stage lower diaphragm support

FIG. 9 is a sectional view of the lower diaphragm support device of the low pressure 8-10 stage in the direction B

Wherein: 1-a vertical plate; 2-a set screw; 3-a reinforcing rib plate; 4-square tube; 5-PP plate; 6-stainless steel pattern plate; 7-a lug hole; 8-angle iron; 9-support plate.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, a turbine diaphragm repair support device provided by the present invention will be described in detail below with reference to the accompanying drawings.

The invention provides a steam turbine partition board overhauling and supporting device, which comprises a low-pressure 1-7-stage upper partition board supporting device shown in a figure 1 and a figure 2, wherein 6-7-stage upper partition boards are placed in a left side neutral gear, and 1-5-stage upper partition boards are placed in a right side neutral gear; the low-pressure 8-10-stage upper partition supporting device is shown in fig. 3 and 4, wherein a 9-stage upper partition is placed in a left neutral position, an 8-stage upper partition is placed in a middle neutral position, and a 10-stage upper partition is placed in a right neutral position; the low-pressure 1-7 stage lower partition supporting device is shown in FIGS. 5 and 6, wherein the 6 and 7 stage lower partitions are placed in the left side neutral gear, and the 1-5 stage lower partitions are placed in the right side neutral gear; in the low-pressure 8-10 stage lower baffle supporting device shown in fig. 7 and 8, the 9 stage lower baffle is placed in the left neutral position, the 8 stage lower baffle is placed in the middle neutral position, and the 10 stage lower baffle is placed in the right neutral position.

As shown in figures 1 and 2, the low-pressure 1-7 level upper clapboard supporting device comprises a vertical plate 1, a fixing screw 2, a reinforcing rib plate 3, a square tube 4, a PP plate 5, a stainless steel pattern plate 6, a lifting lug hole 7, angle irons 8 and a supporting plate 9,

the square tube 4 and the angle iron 8 form a bottom base frame through welding, the stainless steel pattern plate 6 is fixed on the upper surface of the bottom base frame through welding, and the vertical plate 1, the reinforcing rib plate 3 and the supporting plate 9 are connected with the base frame through welding to form a supporting part; the riser 1 is provided with a threaded through hole, the fixing screw 2 is arranged in the threaded through hole on the riser 1, the PP plate 5 is adhered to the top surface of the supporting plate 9, and the square tube 4 is provided with a lug hole. The distance between vertical plates 1 on two sides of each supporting position is slightly larger than the axial thickness of a corresponding partition part, the radial distance of each supporting device is equal to the diameter of the corresponding partition part, and the supporting surface of the placing position of the 1-5-stage partition part is a plane; 6. the height of the supporting surface of the placing position of the 7-level clapboard part is staggered, and the height difference is equal to the height difference of the high and low planes of the middle division surface of the clapboard. After the partition board is placed, the contact area between the median plane and the supporting device is larger than 90%. The gap between the adjacent parts allows one person to pass through, so that the working requirement of a maintainer on cleaning the partition plate is met; the minimum ground clearance of the middle section of the upper partition plate is larger than the maximum arc length of the steam seal block, so that the steam seal block can be conveniently detached by a maintainer under the condition of not hoisting.

As shown in FIG. 9, the low-pressure lower partition is placed on a support plate 9, the support plate 9 and the reinforcing rib plate 3 are connected with a vertical plate 1 through welding, and the support plate 9 is tangent to the back arc of the lower partition at the contact position to provide radial support for the lower partition. PP board 5 pastes at backup pad 9 top surface, contacts with lower baffle, protects the contact surface. The height of the vertical plate 1 is greater than the gravity center height of the lower partition plate, so that the partition plate can be prevented from being toppled.

The invention is implemented as follows:

firstly, after the split bolt in the low-pressure partition plate sleeve is disassembled, the low-pressure upper partition plate is lifted out of the low-pressure cylinder, the low-pressure upper partition plate is placed on the corresponding position of the corresponding low-pressure upper partition plate overhauling and supporting device, and then the fixing screw 2 is screwed down to clamp and fix the upper partition plate. Secondly, the low-pressure lower partition plate is lifted out of the low-pressure cylinder, placed on the corresponding position of the corresponding low-pressure lower partition plate overhauling and supporting device, and then the fixing screw 2 is screwed down to clamp and fix the lower partition plate. After the maintenance work is finished, the fixing screws 2 are released, and the low-pressure lower partition plate and the upper partition plate are lifted back into the low-pressure cylinder in sequence.

It is to be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention, and the present invention is not limited to the above embodiments. Modifications and equivalents of the present invention may be made without departing from the spirit and scope of the invention as defined by the appended claims.