CN204371545U - A kind of power station impeller apparatus for examination and repair - Google Patents

Abstract

The utility model discloses an impeller maintenance device for a power station, which comprises a plurality of lifting devices for lifting the upper outer top cover of the guide vane and a supporting device for supporting the space between the outer top cover and the guide vane, and the supporting device includes a hollow cylinder , the lower end of the hollow cylinder is provided with a groove for buckling on the upper surface of the guide vane, the opening of the groove is downward, the upper surface of the hollow cylinder is provided with a support panel, and the support panel is provided with Bolt holes to fit the outer roof. In this method, the lifting of the bridge crane and the specially designed support device use the weight of the outer top cover and the support frame to raise the shaft sleeve maintenance space in situ, and then directly support the outer top cover, so that various maintenance work of the guide vane of the water turbine can be carried out.

Description

A power station impeller maintenance device

technical field

The utility model relates to a power station impeller maintenance device.

Background technique

The guide vane shaft sleeve mechanism in the hydro turbine unit of the power station cannot be overhauled in general minor repairs and overhauls. The water guide mechanism of the hydraulic turbine is an important part of the hydroelectric generator set. After years of operation, this part must be disassembled for replacement and maintenance. According to the traditional maintenance process and disassembly steps in my country, the original design of 24 guide vanes must be repaired, and the outer roof weighing 105.32 tons must be removed. The cover is divided into four parts in the machine pit and lifted multiple times to the installation site, and then 24 single-piece guide vanes weighing 6.44 tons are hoisted to the traditional maintenance process of the special site for maintenance. The overhaul process is cumbersome, the site is high above the ground, and there are many safety hazards in the operation of super large size and large tonnage, which consumes a lot of manpower and material resources, and has the disadvantages of high labor intensity. This work brings great difficulties and troubles to the maintenance, and becomes a major problem that perplexes every hydropower plant's maintenance.

Utility model content

The purpose of the utility model is to provide a power station impeller overhaul device to solve the problem that the current hydropower station impeller overhaul device consumes a lot of manpower and material resources and is highly dangerous.

In order to achieve the above purpose, a technical solution adopted by the utility model is as follows: a power station impeller maintenance device, including several lifting devices for lifting the upper outer roof of the guide vane and a support for supporting the outer roof and the guide vane device, the supporting device includes a hollow cylinder, the lower end of the hollow cylinder is provided with a groove for buckling on the upper end surface of the guide vane, the opening of the groove is downward, and the upper end of the hollow cylinder is provided with A supporting panel is provided with bolt holes which can be matched with the outer top cover.

Further, the lifting device includes an arc-shaped seat plate matched with the outer top cover, a longitudinally arranged ear plate is fixedly connected to the middle of the arc-shaped seat plate, and a lifting hole is provided on the ear plate, and the arc-shaped seat plate Bolt holes for matching the seat plate and the outer top cover.

Further, the grooved part includes a bottom plate and a fixed side plate perpendicular to the bottom plate, a sliding side plate is provided on the opposite side of the fixed side plate, and the two sides of the bottom plate along the sliding direction of the sliding side plate Bending inside to form a pair of guide rails, a pair of flanges extend on both sides of the lower end of the sliding side plate, the flanges extend into the guide rails, the guide rails formed by the bottom plate are provided with slotted holes, and the flanges are provided with Bolt holes, the sliding side plate is fixedly connected by a bolt passing through the flange and the guide rail.

Further, a shackle is provided in the lifting hole, and a wire rope hung on the hook is provided on the shackle.

Compared with the prior art, the utility model has the following beneficial effects: the utility model adopts the lifting of the bridge crane and the specially designed support device adopts the weight of the outer top cover and the support frame to raise the shaft sleeve maintenance space in situ, and can directly support the The outer top cover can carry out various maintenance work on the guide vanes of the turbine, which avoids a large amount of manpower consumption and increased risk caused by the cross-transportation of multiple volumes.

Description of drawings

Fig. 1 is the structural representation of the utility model hoisting device;

Fig. 2 is a structural schematic diagram of the lifting lug of the utility model;

Fig. 3 is a structural schematic diagram of the supporting device of the present invention;

Fig. 4 is a schematic diagram of the structure of the grooved part of the support device of the present invention (it is the left view direction of Fig. 2);

Fig. 5 is a schematic diagram of the cooperation structure between the sliding side plate and the guide rail of the utility model;

Figure 6 is a schematic cross-sectional view of the existing guide vane (the left and right sides are asymmetrical);

Fig. 7 is a schematic view of the utility model in use.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

A power station impeller maintenance device, including several lifting devices 10 for lifting the upper outer roof of the guide vane and a supporting device 20 for supporting the space between the outer roof and the guide vane, the supporting device 20 includes a hollow cylinder 210, The lower end of the hollow cylinder 210 is provided with a grooved part 220 for buckling on the upper end surface of the guide vane. 230 is provided with the bolt hole that can cooperate with outer top cover.

The hoisting device 10 includes an arc-shaped seat plate 110 matched with the outer top cover, the middle part of the arc-shaped seat plate 110 is fixedly connected with a longitudinally arranged ear plate 120, and the ear plate 120 is provided with a lifting hole 121. Shaped seat plate 110 is provided with the bolt hole 111 that matches with outer top cover, and described lifting hole is provided with shackle, and described shackle is provided with the wire rope that hangs on the suspension hook.

Described channel member 220 comprises a bottom plate 221 and the fixed side plate 222 perpendicular to the bottom plate, and the opposite side of described fixed side plate 222 is provided with sliding side plate 223, and on described bottom plate 221 along the sliding direction of sliding side plate A pair of guide rails 2211 are formed by bending inside. A pair of flanges 2231 extend from both sides of the lower end of the sliding side plate. The edge 2231 is provided with a bolt hole, and the sliding side plate is fixedly connected by a bolt passing through the flange 2231 and the guide rail.

The main purpose of the above structure is that the structure of the guide vane is an asymmetric structure as shown in the figure, one end of which has a larger cross-sectional area and the other end has a smaller cross-sectional area. Both ends of the blade can be stably supported, and the supporting device is used in pairs corresponding to each guide vane 100 during use, and a supporting device is provided on both parts.

The utility model uses the latter impeller maintenance method, including the above-mentioned power station impeller maintenance device, which is characterized in that it includes the following steps:

(1) Install a hoisting device on the outer roof 101 of the hydropower unit, and use bolts to fix the arc-shaped seat plate to the outer roof;

(2) Slowly lift the outer top cover by 1-2mm through the bridge crane, and check that there should be a gap in the whole circle;

When hoisting, it should be ensured that the entire outer roof 101 is hoisted smoothly, and there are multiple hoisting devices that are evenly distributed around the periphery of the outer roof 101 or symmetrically arranged on the outer roof.

(3) Continue to lift the outer roof and slowly lift the outer roof by 900-950mm through the bridge crane;

(4) Put the supporting device 20 between the guide vane 100 and the outer top cover 101, and set the opening of the grooved part 220 of the supporting device 20 downward;

A pair of support devices 20 are provided above each guide vane 100 , that is, one is provided at each of the large and small ends.

(5) Both ends of the same guide vane are provided with a support device, and the size of the sliding side plate is adjusted to match with the upper end surface of the guide vane;

The upper end of the support panel 20 is put into a wedge plate so as to adjust and adjust the support panel on the same horizontal plane to ensure that the force is evenly balanced. The wedge plate is a wedge-shaped plate-shaped body.

(6) Fix the position of the bridge crane.

Compared with the prior art, the utility model has the following beneficial effects: the method adopts the weight of the outer top cover and the support frame to raise the shaft sleeve maintenance space in situ, and directly supports the outer top cover through the hoisting of the bridge crane and the specially designed support device , that is, various maintenance work of the guide vane of the turbine can be carried out, avoiding a large amount of manpower consumption and increased risk caused by the cross-transportation of multiple volumes.

The above descriptions are only preferred embodiments of the present utility model, and all equivalent changes and modifications made according to the patent scope of the present utility model shall fall within the scope of the present utility model.

Claims (4)

1. a power station impeller apparatus for examination and repair, it is characterized in that, comprise several lifting stator tops outside top cover boom hoistings and for supporting the support device between outer top cover and stator, described support device comprises a hollow cylinder, described hollow cylinder lower end is provided with the grooved part for being buckled on stator upper-end surface, Open Side Down for described grooved part, and described hollow cylinder upper-end surface is provided with a support panel, and described support panel is provided with the bolt hole that can match with outer top cover.

2. a kind of power station according to claim 1 impeller apparatus for examination and repair, it is characterized in that, described boom hoisting comprises the arc seat board matched with outer top cover, an otic placode longitudinally arranged is fixedly connected with in the middle part of described arc seat board, described otic placode is provided with lifting hole(eyelet), the bolt hole that described arc seat board matches with outer top cover.

3. a kind of power station according to claim 2 impeller apparatus for examination and repair, it is characterized in that, described grooved part comprises a base plate and perpendicular to the fixed lateral plate on base plate, the side that described fixed lateral plate is relative is provided with slip side plate, described base plate bends inwards along the both sides of slip side plate glide direction formation pair of guide rails, both sides, described slip side plate lower end are extended with pair of flanges, described flange stretches in guide rail, the guide rail that described base plate is formed is provided with slotted eye, described flange is provided with bolt hole, and described slip side plate is fixedly connected with through the bolt that runs through flange and guide rail.

4. a kind of power station according to claim 2 impeller apparatus for examination and repair, is characterized in that, be provided with shackle in described lifting hole(eyelet), described in unload the wire rope buckled and be provided with and be hung on suspension hook.