CN212063678U

CN212063678U - Removable footing structure for large-scale unit

Info

Publication number: CN212063678U
Application number: CN202020813324.8U
Authority: CN
Inventors: 高艳俊; 赵建军; 沈洪涛; 郑瑞华; 李淑娟
Original assignee: Alstom Beizhong Power Beijing Co Ltd
Current assignee: Alstom Beizhong Power Beijing Co Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-12-01
Anticipated expiration: 2030-05-15

Abstract

The utility model relates to a large-scale unit equips the manufacturing field, especially a large-scale unit is with removable formula footing structure, including mount pad and split type footing, the mount pad with the shell of unit is fixed, split type footing pass through the bolt with the mount pad is connected fixedly. The utility model discloses utilize the bolt to fix split type footing installation on the mount pad, when the unit transportation, demolish split type footing, the widest size of unit only depends on unit housing's size for whole transportation size reduces, has satisfied transportation requirements such as railway and highway, after the unit transportation supports the scene, assembly again goes. Therefore, adopt the utility model discloses make large-scale unit quicker, transport safely to the scene, shortened the transportation cycle, practiced thrift the cost of transportation.

Description

Removable footing structure for large-scale unit

Technical Field

The utility model relates to a large-scale unit equips the field of making, especially a large-scale unit is with removable formula footing structure.

Background

The footing structure is an important component of various large-scale units represented by a generator, and is used for installing the generator on the basis of a power plant and ensuring the stability of the operation of the units.

The conventional large generator stator adopts a welding type footing, namely, a footing plate, a support rib plate and other structures are directly welded on a shell of a stator base. As shown in fig. 1, which is a structural diagram of the external shape of the conventional generator stator base, the generator feet 10 are respectively welded and fixed at symmetrical positions at two sides of the lower end of the generator stator base housing 1. As shown in fig. 2, the enlarged view of a part of a footing 10 in fig. 1 is shown, the footing includes a footing plate 3 and a support rib plate 2 welded to a side edge of a stator frame housing 1, the footing plate 3 is horizontally arranged, the support rib plate 2 is vertically arranged and perpendicular to the footing plate 3, wherein an installation position of the footing plate 3 is located on a foundation support of a running platform, and the width of the support rib plate 2 and the footing plate 3 needs to meet certain requirements to ensure sufficient strength.

With the application of new materials, new processes and new technologies, the single-machine capacity of the turbonator is continuously increased, and the overall dimension of the turbonator is increased. Resulting in a problem of the overall transportation of the generator stator.

Taking a 1000MW steam turbine generator as an example, if the design structure is adopted, the widest part of the whole assembly is positioned at the outer edges of the base plates at two sides, the size requirement of the railway building clearance of China standard for long and large cargo transportation is exceeded, and the railway transportation of the generator stator cannot be realized. Even if the transportation is carried out by water route or road or the two transportation modes are mixed, the transportation by road also has the limitation of bridge and culvert loads, and the like, which all make the whole transportation of the generator stator very difficult and even can not reach the installation site on time.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes the defect of above-mentioned welded fastening formula footing has solved the problem that the stator width surpassed the size limit of railway transportation, provides a large-scale unit with removable footing structure.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a large-scale unit is with removable formula footing structure, includes mount pad and split type footing, the mount pad with the shell of unit is fixed, split type footing pass through the bolt with the mount pad is connected fixedly.

Furthermore, split type footing can be including being the footing board of horizontal arrangement and being the vertical support rib plate of arranging, still include respectively with footing board and support rib plate mutually perpendicular and welded fastening's mounting panel, the bolt runs through the mounting panel, with the mount pad is connected fixedly.

Furthermore, the mounting plate and the mounting seat can be correspondingly provided with a positioning structure for accurately positioning the mounting plate and the mounting seat.

Further, the positioning structure may include pin holes correspondingly disposed on the mounting plate and the mounting seat, respectively, and a pin penetrating through the pin holes.

The utility model discloses utilize the bolt to fix split type footing installation on the mount pad, when the unit transportation, demolish split type footing, the widest size of unit only depends on unit housing's size for whole transportation size reduces, has satisfied transportation requirements such as railway and highway, after the unit transportation supports the scene, assembly again goes. Therefore, adopt the utility model discloses make large-scale unit quicker, transport safely to the scene, shortened the transportation cycle, practiced thrift the cost of transportation. In addition, through the pin runs through the pin hole on mount pad and the mounting panel, realize with the accurate assembly of stator frame, further ensure the reliable operation of unit.

Drawings

FIG. 1 is a structural diagram of the external form of a stator frame of a conventional generator,

figure 2 is an enlarged view of a portion of foot 10 of figure 1,

fig. 3 is a schematic structural diagram of the preferred embodiment of the present invention.

Detailed Description

The utility model discloses a large-scale unit is with removable formula footing structure. The present invention will be described in detail with reference to the preferred embodiments, in which the large-scale unit is a turbine generator.

As shown in fig. 3, the structural schematic diagram of the preferred embodiment is that the structural schematic diagram includes a mounting base 11 and a split type footing, the mounting base 11 is welded and fixed to the casing 1 of the steam turbine generator, the split type footing includes a footing plate 12 that is horizontally arranged, a support rib plate 13 that is vertically arranged, and a mounting plate 14, the mounting plate 14 is respectively perpendicular to the footing plate 12 and the support rib plate 13 and welded and fixed to each other, and the structure perpendicular to each other among the three is adopted, so that the split type footing has a high strength. The mounting plate 14 and the mounting seat 11 are connected through bolts 15 and fixed to each other. Because turbonator requires very high to the installation accuracy, split type footing after the welding, need carry out machining, its machining precision of strict control, including form and position tolerance, dimensional tolerance, roughness etc. and on the mounting panel 14 and the mount pad 11 correspond set up the cotter hole to run through pin 16, constitute one kind and can make the location structure of

mounting panel

14 and 11 accurate location of mount pad, and then realize accurate assembly between split type footing and the generator.

According to the structure, when the unit is transported, the split type bottom feet are removed, the total width of the generator can be effectively reduced, and the generator can be smoothly transported to a power plant by adopting a railway transportation mode. And after the generator is transported to the site, the split type bottom feet are accurately assembled again, so that the generator is reliably supported, and the safe and reliable operation of the generator is ensured.

In addition to the steam turbine generator in the preferred embodiment described above, the present invention is also applicable to other types of large-scale unit equipment, and provides a removable footing design for transportation or other needs. In addition, the positioning structure can also adopt a matching structure such as mutually matched step structures, convex keys and key grooves, and the like to realize the assembling positioning between the mounting plate and the mounting seat, and the mode of adopting pins in the preferred embodiment is more accurate in comparison and simple and convenient to mount. In the foot structures of other units with high requirements on stability but low requirements on precision, the pins 16 can be replaced by another group of bolts, so that a more stable fixed connection is realized.

The removable footing structure for the large-scale unit provided by the utility model is described in detail above, and the principle and the implementation mode of the utility model are explained by applying specific examples, and the description of the above examples is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. The utility model provides a large-scale unit is with removable formula footing structure which characterized in that: the mounting seat is fixed with a shell of the unit, and the split type bottom feet are fixedly connected with the mounting seat through bolts.

2. The removable footing structure for large scale units of claim 1, wherein: the split type footing comprises a footing plate and a support rib plate, wherein the footing plate is horizontally arranged, the support rib plate is vertically arranged, the split type footing further comprises a mounting plate, the footing plate and the support rib plate are perpendicular to each other and are welded and fixed, and the bolt penetrates through the mounting plate and is fixedly connected with the mounting base.

3. The removable footing structure for large scale units of claim 2, wherein: on mounting panel and the mount pad, still corresponding be provided with make mounting panel and mount pad accurate positioning's location structure.

4. The removable footing structure for large scale units of claim 3, wherein: the location structure includes the pin hole that corresponds the setting on the mounting panel and on the mount pad respectively, and runs through the pin in pin hole.