CN215566356U

CN215566356U - Upper frame cover plate of axial-flow type water turbine generator set

Info

Publication number: CN215566356U
Application number: CN202121763045.6U
Authority: CN
Inventors: 闫惠斌; 杜海元; 薛嘉琪; 马春杰; 王世魁; 李海龙; 宗树冬; 樊长庆; 刘晓鹤; 魏宝丰; 王占海; 张凯; 程书官; 张晨; 杨平; 陈胜武; 张俊鹏; 井民伟; 曹佳欣
Original assignee: Huanghe Mingzhu Water Conservancy And Water Power Construction Co ltd
Current assignee: Huanghe Mingzhu Water Conservancy And Water Power Construction Co ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-01-18
Anticipated expiration: 2031-07-30

Abstract

The utility model relates to an upper frame cover plate of an axial flow type water turbine generator set, which can effectively solve the problems of difficult positioning, difficult installation and difficult sealing in the prior art and has the technical scheme that a framework is in a ring shape formed by splicing a plurality of fan-shaped frameworks, a panel is in a ring shape formed by splicing a plurality of fan-shaped steel plates and fixedly covers the frameworks, the panel is respectively composed of a first outer ring panel, a second outer ring panel, a first inner ring panel and a second inner ring panel, and the framework is respectively composed of a first outer ring framework, a second outer ring framework, a first inner ring framework and a second inner ring framework.

Description

Upper frame cover plate of axial-flow type water turbine generator set

Technical Field

The utility model relates to the field of power generation, in particular to an upper frame cover plate of an axial-flow type water turbine generator set.

Background

The general upper frame cover plate framework of the generator set consists of channel steel, I-steel and angle steel, the overall strength of the framework is poor in design, and due to frequent hoisting, welding spots of welding positions of a checkered plate and the framework on the surface of the cover plate crack, the edges of partial checkered plates tilt up, the surface of the cover plate is uneven, the flatness and the attractiveness of the whole cover plate cannot be guaranteed, and the overall appearance of a plant is seriously influenced; the traditional upper frame cover plate is fixed by welding steel plates at certain intervals on an upper frame support arm to serve as adjusting sizing blocks, arranging threaded holes on the surface or the periphery of the sizing block and the like, and punching holes on a frame and a panel of the cover plate framework to integrate bolts and threaded holes in the frame sizing blocks. Repeatedly hoisting the cover plate to adjust the position of the panel and the threaded hole of the upper frame when the cover plate is reloaded each time; after the cover plate of the traditional machine frame is installed, the inner and outer ring frameworks fall on the adjusting sizing blocks of the thrust oil groove and the spigot platform of the machine set, the fine adjustment of the planeness of the whole cover plate is completed by adjusting the height of a bolt, all contact parts between the cover plate and the sizing blocks are in rigid contact, the machine set vibrates to a certain extent when in operation, and workers can feel obvious vibration and noise when standing on the cover plate; the clearance between frame apron and machine hole and the unit in the tradition generally adopts the rubber bonding, and the unit long-term operation in-process produces the fracture easily, needs the periodic replacement, changes at every turn and need clean up original rubber mark, wastes time and energy, and sealed effect is poor. Therefore, replacing the new upper frame cover plate is a technical problem that needs to be solved.

Disclosure of Invention

In view of the above situation, in order to overcome the defects in the prior art, the present invention provides an upper frame cover plate of an axial flow type water turbine generator set, which can effectively solve the problems of difficult positioning, difficult installation and difficult sealing in the prior art.

The technical scheme includes that the steel plate rabbet platform steel plate rabbet platform steel plate rabbet platform steel plate, And an upper frame sizing block is arranged on the upper frame support arm of the unit, two channel steels with downward notches are arranged on the upper frame sizing block side by side, a second shockproof wool pad is arranged on the channel steels, a first inner ring framework and a second inner ring framework are arranged on the second shockproof wool pad, and a first inner ring panel and a second inner ring panel are respectively arranged on the first inner ring framework and the second inner ring framework.

The upper frame cover plate is convenient to disassemble after being installed, high in strength, strong in deformation resistance and good in sealing effect, can meet the operation requirement of a unit in many aspects, is an innovation on the upper frame cover plate of the generator set, is easy to produce, popularize and apply, and has huge economic and social benefits.

Drawings

FIG. 1 is a top view of the structure of the present invention.

Fig. 2 is a side view of the structure of the present invention.

FIG. 3 is an enlarged view of the portion I of FIG. 2 according to the present invention.

FIG. 4 is an enlarged view of the portion II of FIG. 2 according to the present invention.

FIG. 5 is an enlarged view of the portion III of FIG. 1 according to the present invention.

FIG. 6 is a schematic cross-sectional view taken along line A-A of FIG. 1 according to the present invention.

FIG. 7 is a schematic cross-sectional view taken along line B-B of FIG. 1 according to the present invention.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in figures 1-7, the utility model comprises a framework and a panel, wherein the framework is a ring shape formed by splicing a plurality of fan-shaped frameworks, the panel is a ring shape formed by splicing a plurality of fan-shaped steel plates, the panel is fixedly covered on the framework and is respectively composed of a first outer ring panel 4, a second outer ring panel 12, a first inner ring panel 14 and a second inner ring panel 17, the framework is respectively composed of a first outer ring framework 5, a second outer ring framework 25, a first inner ring framework 13 and a second inner ring framework 18, a rabbet platform iron pad 8 is arranged on an original machine pit rabbet platform 9, a rabbet platform datum plate 7 fixed with the rabbet platform upright rib plate 2 is arranged on the rabbet platform iron pad 8, the rabbet platform upright rib plate 2, the rabbet platform datum plate 7 and a new machine pit rabbet platform 1 are fixed together, a first shockproof wool pad 6 is arranged on the outer ring of the rabbet platform datum plate 7, a first shockproof wool pad 6 and a first framework 5 are arranged on the first shockproof wool pad, the first outer ring framework 5 and the second outer ring framework 25 are respectively provided with a first outer ring panel 4 and a second outer ring panel 12, an upper frame sizing block 21 is arranged on an upper frame support arm 22 of the unit, two channel steel 20 with downward notches are arranged on the upper frame sizing block 21 side by side, a second shockproof wool pad 19 is arranged on the channel steel 20, a first inner ring framework 13 and a second inner ring framework 18 are arranged on the second shockproof wool pad 19, and the first inner ring framework 13 and the second inner ring framework 18 are respectively provided with a first inner ring panel 14 and a second inner ring panel 17.

In order to ensure the using effect, the panels are formed by splicing steel plates with the thickness of 10mm, the outer ring panels are 32, the inner ring panels are 16, the frameworks are formed by splicing 120-80-4 rectangular tubes 25, the outer ring frameworks are 8, and the inner ring frameworks are 8.

Positioning pins 26 are welded on two sides of the channel steel 20, first positioning plates 27 are mounted on two sides of the first inner ring framework 13 and the second inner ring framework 18, and the positioning pins 26 are matched with the first positioning plates 27 to form an inner ring panel positioning structure.

The two sides of the channel steel 20 are welded with nuts 31, the two sides of the first outer ring framework 5 and the second outer ring framework 25 are provided with second positioning plates 30, and the second positioning plates 30 and the nuts 31 are in threaded connection through bolts 28 and washers 29 to form an outer ring panel positioning structure.

The first outer ring panel 4 and the spigot stand rebar plate 2 are provided with T-shaped sealing strips 3, a first silicone sealant 24 is arranged at a joint between the first outer ring panel 4 and the second outer ring panel 12, and a first sealing strip 23 is arranged between the first outer ring framework 5 and the second outer ring framework 25, so that the shockproof sealing structure of the outer ring panel is formed.

And a second silicone sealant 15 is arranged between the first inner ring panel 14 and the second inner ring panel 17, and a sealing strip 16 is arranged between the first inner ring framework 13 and the second inner ring framework 18, so that the shockproof sealing structure of the inner ring panels is formed.

The first outer ring panel 4 is provided with an inspection hole cover plate 10, a third anti-seismic wool pad 11 is arranged below the inspection hole cover plate 10, and a second outer ring panel 12 is arranged on the periphery of the third anti-seismic wool pad 11.

The use condition of the utility model is that fig. 1 is a panel of a novel upper frame cover plate, the panel is a circular ring formed by splicing a plurality of fan-shaped steel plates, the size and the number of single panels can be adjusted according to the sizes of a generator set head and a machine pit, and the number of upper frame support arms, and vent holes, manhole holes and the like can be reserved on the panel according to actual needs.

Fig. 2 is a framework of a novel upper frame cover plate, the main material of the framework is Q235-B common carbon structural steel, and a proper square tube is selected to be welded according to the on-site measurement size. Whole skeleton is formed by the concatenation of a plurality of fan-shaped skeleton, and the hoist and mount nut is equipped with in the four corners of single skeleton, and its upper end panel also can cut out the hoist and mount nut hole on the position that corresponds when processing, and single skeleton and its single block panel welding that corresponds are a little apron, hoists the little apron of each position to the assigned position in proper order during the installation, can accomplish the installation of novel upper rack apron.

3-5 are enlarged views of joint parts of the cover plate, before the cover plate is installed, a basic backing plate is installed in a machine pit spigot, the basic backing plate is adjusted to be on the same horizontal plane, after the adjustment is finished, the basic backing plate is welded with an embedded part which is arranged in the machine pit in advance, a steel spigot platform reference horizontal backing plate is placed on the basic backing plate, and after the position is adjusted, the reference plate and the backing plate are welded into a whole. The gap between the reference plate and the plane of the spigot platform is filled with concrete, and a circle of coaming is welded on the inner circumference of the reference plate after the concrete is solidified, so that the concrete in the gap can not fall into a machine pit due to vibration generated during operation of the machine set. The depth of the seam allowance is considered when the cover plate is selected, the horizontal plane of the machine pit is considered when the reference horizontal plate is installed, and the height difference between the cover plate and the horizontal plane of the machine pit is ensured to be within a control range after the cover plate is installed. And finding out a stress point of the cover plate on the upper frame, measuring the elevation, placing the basic base plates at the stress point, adjusting all the basic base plates on the same plane, and welding the basic base plates with the support arm of the upper frame after the adjustment is finished. Two channel steels with corresponding sizes are laid on the base cushion plate, the notches face downwards, and the same elevation with the adjusting pad on the circumferential seam allowance table is guaranteed. Glue the wool pad on the plane on the channel-section steel and on the horizontal backing plate of pit benchmark, tiling the apron of making on unit upper rack surface, finely tune the apron, adjust the 5mm clearance between the apron earlier, then the roughness of adjustment apron, still need compromise with the difference in height of pit horizontal plane when the adjustment apron is planar, the apron plane all adjusts suitable back at apron skeleton frame steel pipe inboard welding locating pin with the clearance, upper rack face, steel tang platform and the corresponding locating pin position welding position cover of apron. According to the actual situation of a site, an inspection hole, an oil pipe and a cable hole are formed, the oil pipe and the cable are welded in a splicing mode to form a protective sleeve, four sides of a small cover plate of the oil pipe are sealed by wool pads, four corners of the small cover plate of the oil pipe are fixed by countersunk bolts, a character head is marked at a corresponding position after the cover plate of an upper frame is preassembled, a gap of 20mm is reserved between the outer circle of the cover plate and a surrounding plate, silicone tunnel sealant is marked at the gap between the panels, and a gap between the outer ring and the horizontal plane of a machine pit is sealed by a T-shaped sealing strip; the inner ring and the machine head gap are sealed by the silicone cave sealant, so far, the installation of the novel upper frame cover plate is completely finished, and when the machine set is overhauled, if the cover plate needs to be opened, the paper cutter is only needed to cut the middle of the sealant in the sealing groove position, and then the lifting can be easily carried out.

After the sealing device is installed, silicone sealant is applied to the gap between the cover plate and the machine head, the gap between the outer ring and the horizontal plane of the machine pit is sealed by a T-shaped sealing strip, the sealing strip is extruded by a cement seam allowance platform at the periphery of the machine pit and a flat iron at the edge of the cover plate of the upper frame to enable two wings to be tightly attached to the ground plane and the surface of the cover plate of the upper frame to play a sealing role, and an inner hexagonal countersunk head bolt is arranged at a special hoisting nut of the cover plate, so that all gaps of the cover plate are filled. In order to reduce the vibration of the cover plate, channel steel and angle steel are changed into rectangular steel pipes in a unified mode, the rigidity of the framework is increased, self-adhesive wool filler strips are additionally arranged on a horizontal foundation filler plate and a channel steel panel, rigid contact between the cover plate and an upper frame is changed into flexible contact to slow down vibration, the newly-additionally-arranged positioning pin and the positioning sleeve are positioned by the cover plate in a self-resetting mode, and the quick dismounting and the bolt connection are not needed.

The upper frame cover plate absolutely meets normal production requirements through strict strength and load theoretical calculation, the new cover plate is convenient to disassemble and assemble, high in strength, strong in deformation resistance and good in sealing effect, dust can be effectively prevented from entering, meanwhile, the workload of constructors and plant cleaning staff is reduced, convenience is brought to overhaul and daily maintenance of a unit, the overall effect of the plant can be effectively improved after the novel cover plate is installed, the appearance is attractive and elegant, and safe and stable operation of the unit is guaranteed.

After the novel upper frame cover plate is updated, the cover plate vibrates little when the unit operates, the sealing effect is good, dust accumulation is effectively avoided, reliable guarantee is provided for long-term stable operation of the unit, the cover plate is convenient to hoist and mount, quick to reinstall and small in deformation when the unit is overhauled, the labor intensity of workers is greatly relieved, the working efficiency is improved, the problems of difficult positioning, difficult installation and difficult sealing of the original cover plate are successfully solved, the updated cover plate is convenient to disassemble, high in strength, strong in deformation resistance and good in sealing effect; the appearance of the factory building is greatly improved after the installation, so that the factory building becomes neat, beautiful and elegant, the utilization rate and the working efficiency of human resources are improved, and the economic and social benefits are huge.

Claims

1. An upper frame cover plate of an axial-flow type water turbine generator set comprises a framework and a panel, and is characterized in that the framework is a circular ring formed by splicing a plurality of fan-shaped frameworks, the panel is a circular ring formed by splicing a plurality of fan-shaped steel plates, the panel is fixedly covered on the framework and is respectively composed of a first outer ring panel (4), a second outer ring panel (12), a first inner ring panel (14) and a second inner ring panel (17), the framework is respectively composed of a first outer ring framework (5), a second outer ring framework (25), a first inner ring framework (13) and a second inner ring framework (18), a spigot platform sizing block (8) is arranged on an original machine pit spigot platform (9), a spigot platform reference plate (7) fixed with a spigot platform vertical rib plate (2) is arranged on the spigot platform sizing block (8), the spigot platform vertical rib plate (2), the spigot platform reference plate (7) and a new machine pit spigot platform (1) are fixed together, the seam allowance table is characterized in that a first shockproof wool pad (6) is arranged on a seam allowance table reference plate (7), a first outer ring framework (5) is arranged on the first shockproof wool pad (6), a first outer ring panel (4) and a second outer ring panel (12) are respectively arranged on the first outer ring framework (5) and the second outer ring framework (25), an upper frame sizing block (21) is arranged on a frame support arm (22) on the unit, two channel steels (20) with downward notches are arranged on the upper frame sizing block (21) side by side, a second shockproof wool pad (19) is arranged on the channel steels (20), a first inner ring framework (13) and a second inner ring framework (18) are arranged on the second shockproof wool pad (19), and a first inner ring panel (14) and a second inner ring panel (17) are respectively arranged on the first inner ring framework (13) and the second inner ring framework (18).

2. The upper frame cover plate of an axial flow type hydroelectric generating set according to claim 1, wherein the panels are formed by splicing steel plates with the thickness of 10mm, the outer ring panels are 32, the inner ring panels are 16, the frames are formed by splicing 120-80-4 rectangular pipes, the outer ring frames are 8, and the inner ring frames are 8.

3. The upper frame cover plate of the axial flow type water turbine generator set according to claim 1, wherein positioning pins (26) are welded on two sides of the channel steel (20), first positioning plates (27) are respectively installed on two sides of the first inner ring framework (13) and the second inner ring framework (18), and the positioning pins (26) are matched with the first positioning plates (27) to form an inner ring panel positioning structure.

4. The upper frame cover plate of the axial flow type water turbine generator set according to claim 1, wherein nuts (31) are welded on two sides of the channel steel (20), second positioning plates (30) are mounted on two sides of the first outer ring framework (5) and the second outer ring framework (25), and the second positioning plates (30) and the nuts (31) are in threaded connection through bolts (28) and gaskets (29) to form an outer ring panel positioning structure.

5. The upper frame cover plate of the axial-flow type water-turbine generator set according to claim 1, wherein a T-shaped sealing strip (3) is arranged between the first outer ring panel (4) and the seam allowance standing rib plate (2), a first silicone sealant (24) is arranged at a seam between the first outer ring panel (4) and the second outer ring panel (12), and a first sealing strip (23) is arranged between the first outer ring framework (5) and the second outer ring framework (25), so that an outer ring panel shockproof sealing structure is formed.

6. The upper frame cover plate of the axial flow type water turbine generator set according to claim 1, wherein a second silicone sealant (15) is arranged between the first inner ring panel (14) and the second inner ring panel (17), and a sealing strip (16) is arranged between the first inner ring framework (13) and the second inner ring framework (18) to form an inner ring panel shockproof sealing structure.

7. The upper frame cover plate of the axial flow type water-turbine generator set according to claim 1, wherein an inspection hole cover plate (10) is arranged on the first outer ring panel (4), a third anti-vibration wool pad (11) is arranged below the inspection hole cover plate (10), and a second outer ring panel (12) is arranged on the periphery of the third anti-vibration wool pad (11).