Continuous hoisting device for guide vane of pump turbine

Abstract

The utility model discloses a pump turbine guide vane continuous hoisting device, a turbine comprises a top cover and a guide vane, and a center hole is formed in the center of the top cover; the hoisting device is arranged on the bottom surface of the top cover and comprises a track, a track connecting device and an electric hoist sliding along the track; the rail is a sliding rail fixed on the bottom surface of the top cover and arranged in an S shape; wherein two wings of the S shape are arranged along the inner side of the peripheral edge of the top cover bottom surface, and the middle part of the S shape is radially arranged along the top cover bottom surface and radially passes through the top cover center hole; and each group of track connecting devices is connected with the top cover and is fixed by hanging the track. Through the track arranged in the S shape along the top cover fixing sleeve hole, the guide vane does not need to be dragged when being hoisted and installed, and abrasion, caused by dragging, of the machining face of an inner opening of the top cover is avoided; load conversion can be completed in the center of a machine pit, the electric hoist can reach any hoisting position along the S-shaped track at a time, potential safety hazards are reduced, and meanwhile the purpose of continuous hoisting of the guide vane is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of the design of installation equipment for hydropower projects, in particular to a continuous hoisting device for installing movable guide vanes of a pump-turbine in a hydropower project. Background Technique

[0002] The guide vanes of a pump-turbine are located in front of the runner and are the main components of the water guide mechanism of the pump-turbine. Their main functions are to control the angle and flow rate of the water flow entering the runner and to adjust the rotational speed of the runner to meet the load requirements of the unit. Due to the limitation of the overall structure of the pump-turbine, the top cover needs to be assembled into a whole in the pit, and then the top cover is suspended in the pit, and then the guide vanes are hoisted. Generally, there are 20 movable guide vanes in a unit, which are arranged along the outer circle of the top cover. When the top cover is suspended in the pit, the installation or removal of the movable guide vanes cannot be directly positioned by using the crane hook of the bridge crane alone. The guide vanes can only be hoisted into the pit from the center of the top cover, and then the guide vanes are pulled to the corresponding guide vane lower shaft sleeves on the bottom ring by using auxiliary equipment.

[0003] At present, the hoisting of movable guide vanes in the industry adopts the method of dragging with a chain block, that is, the movable guide vanes are first hoisted into the pit from the center of the top cover by the construction bridge crane, and then the chain block fixed on the guide vane sleeve hole in the top cover is used to slowly drag the movable guide vanes to below the guide vane sleeve hole. When the movable guide vanes are pushed to the vertical state, the construction bridge crane hook is removed to realize the conversion of the load hook, and the movable guide vanes are hoisted in place by using the chain block. This installation method has many disadvantages. First, when the movable guide vanes are hoisted into the top cover, due to the lack of height space, when dragging with the chain block, the dragging angle is large, resulting in the steel wire rope of the construction bridge crane clinging to the inner opening of the top cover. Continuous dragging is likely to damage the precision machining surface of the inner opening of the top cover, laying a hidden danger for the reliable operation of the subsequent unit. Second, after each guide vane is hoisted, the chain block fixed on the guide vane sleeve hole in the top cover has to be moved to the next inner guide vane sleeve hole. The operators have to enter and exit the top cover back and forth to move the position of the chain block. The top cover is suspended in the air, and it is extremely inconvenient to enter and exit the top cover, bringing great potential safety hazards to the operators. Third, the movement of the chain block takes time and effort. The chain block has to be repeatedly lifted into the top cover and then fixed through the next guide vane sleeve hole. During the movement, the hoisting operation has to be suspended, which not only poses a risk of the chain block falling, but also takes a long linear construction period. Therefore, we propose a continuous hoisting device for movable guide vanes in hydropower projects. Summary of the Invention

[0004] The utility model discloses a continuous hoisting device for guide vanes of a pump-turbine. The purpose of the utility model is to provide a hoisting device that can install the guide vanes of a pump-turbine in series, safely and with higher efficiency.

[0005] The technical solution adopted by the utility model is:

[0006] A continuous hoisting device for guide vanes of a pump-turbine. The pump-turbine includes a top cover and guide vanes, and there is a central hole in the center of the top cover. It is characterized in that the hoisting device is arranged on the bottom surface of the top cover and includes a track, a track connection device, and an electric hoist that slides along the track.

[0007] The track is a slide rail fixed to the bottom surface of the top cover and arranged in an S shape. Among them, the two wings of the S shape are arranged along the inner side of the peripheral edge of the bottom surface of the top cover, and the middle part of the S shape is arranged radially along the bottom surface of the top cover and radially passes through the central hole of the top cover.

[0008] Multiple groups of track connection devices are arranged at intervals, and each group is connected to the top cover and suspends and fixes the track.

[0009] Furthermore, the track connection device is composed of an upper end cover, a lower end cover, and a track connection seat. The upper end cover is installed on the upper side of the fixed sleeve of the top cover, the lower end cover is installed on the lower side of the fixed sleeve of the top cover, and the upper end cover and the lower end cover are fixedly fastened by bolts passing through the fixed sleeve of the top cover. The track connection seat is welded to the bottom surface of the lower end cover for hanging and supporting connection with the track.

[0010] Furthermore, the track is composed of multiple detachable sections of slide rails, including arc-shaped slide rails with two wings arranged along the inner side of the peripheral edge of the bottom surface of the top cover, and straight slide rails with the middle part arranged radially along the bottom surface of the top cover and passing through the central hole of the top cover in the radial direction. Each section of the slide rail is provided with a track connection plate for connecting and fixing with the track connection device.

[0011] Furthermore, stoppers for preventing the electric hoist from slipping out are fixedly arranged at both ends of the S shape of the track.

[0012] Furthermore, the electric hoist is composed of a traveling drive motor, a drive wheel, a chain drive motor, and a sling device. The traveling drive motor is drivingly connected to the drive wheel for driving the electric hoist to move along the S-shaped track, and the chain drive motor is used to drive the sling to rise and fall to realize the hoisting of the guide vane.

[0013] Compared with the prior art, the present utility model has the following beneficial effects:

[0014] With the track arranged in an S shape along the hole of the fixed sleeve of the top cover in the present utility model, when the movable guide vane is hoisted into the pit, large-angle dragging is not required, and the guide vane always remains at the center of the pit. Therefore, wear of the machined surface of the inner opening of the top cover caused by dragging is avoided; when the guide vane is hoisted into the pit, the load conversion can be completed at the center of the pit. The electric hoist can reach any hoisting position along the S-shaped track at one time, avoiding the need for operators to enter and exit the top cover back and forth to replace the position of the manual hoist, greatly reducing the safety hazard while achieving the purpose of continuous hoisting of the guide vane; the operation of the electric hoist reduces the number of operators and the direct construction period, and improves the economic benefits of project construction. Description of the Drawings

[0015] Figure 1Schematic front view of the overall installation structure of the device of the present utility model;

[0016] Figure 2 Schematic bottom view of the overall installation structure of the device of the present utility model;

[0017] Figure 3 Schematic diagram of the first part of the track of the device of the present utility model;

[0018] Figure 4 Schematic diagram of the second part of the track of the device of the present utility model;

[0019] Figure 5 Schematic bottom view of the track connection device of the device of the present utility model;

[0020] Figure 6 Schematic top view of the track connection device of the device of the present utility model;

[0021] Figure 7 Schematic diagram of the upper end cover of the track connection device of the device of the present utility model;

[0022] Figure 8 Schematic diagram of the lower end cover and the track connection plate of the track connection device of the device of the present utility model;

[0023] Figure 9 Schematic diagram of the electric hoist of the present utility model.

[0024] Reference numerals in the figures:

[0025] 1 - Track, 1.1 - Split track, 1.2 - Connecting track, 1.3 - Track connection plate, 1.4 - Stop block; 2 - Track connection device, 2.1 - Upper end cover, 2.2 - Lower end cover, 2.3 - Track connection seat, 2.4 - Bolt; 3 - Electric hoist, 3.1 - Travel driving motor, 3.2 - Driving wheel, 3.3 - Chain driving motor, 3.4 - Sling device, 4 - Top cover, 4.1 - Central hole of the top cover, 5 - Guide vane. Detailed implementation manners

[0026] The present utility model will be further described below in conjunction with the detailed implementation manners. The detailed implementation manners are further explanations of the principle of the present utility model and do not limit the present utility model in any way. Technologies identical or similar to the present utility model do not exceed the protection scope of the present utility model.

[0027] In conjunction with the accompanying drawings.

[0028] As Figures 1 to 5As shown in the figure, the continuous hoisting device for the guide vane of the pump-turbine of the present utility model includes: a track 1, a top cover track connection device 2, and an electric hoist 3. After the unit top cover 4 is assembled and suspended in the pit, first fix six sets of top cover track connection devices 2 to the corresponding fixed sleeve positions of the top cover 4 through bolts 2.4. The upper end cover 2.1 of the top cover track connection device is installed on the upper side of the fixed sleeve inside the top cover 4, and the lower end cover 2.2 is installed on the lower side of the fixed sleeve outside the top cover 4. The track connection seat 2.3 is welded to the lower end cover, and the track 1 is fixed to its body through bolts on the track connection seat 2.3.

[0029] After the top cover track connection device 2 is fixed, use the construction crane to sequentially connect and fix the track 1 to the top cover track connection device 2. First, install two tracks 1 with stoppers 1.4 on the outer circle to ensure that the stoppers 1.4 can prevent the electric hoist 3 from derailing, and then install the radially arranged connecting tracks 1.2. There are track connection plates 1.3 on all tracks 1, and the track 1 is stably fixed to the top cover track connection device 2 through the track connection plates 1.3.

[0030] After the track 1 is installed, assemble the components of the electric hoist 3 one by one. First, closely fit the driving wheel 3.2 to the track 1. After the driving wheel 3.2 is installed, slide along the track 1 first to ensure smooth movement. Then install devices such as the traveling driving motor 3.1, the chain driving motor 3.3, and the sling device 3.4. After completion, perform debugging to ensure that the electric hoist 3 can move smoothly along the track 1.

[0031] After the guide vane 5 is hoisted into the pit by the construction crane, operate the electric hoist 3 to the center of the connecting track 1.2. After the height of the guide vane 5 meets the requirements, transfer the guide vane 5 to the sling of the electric hoist 3. Operate the electric hoist 3, and move the guide vane 5 to above the corresponding lower shaft sleeve according to the numbered position of the guide vane 5. Then operate the chain driving motor 3.3 to smoothly hoist the guide vane 5 into the lower shaft sleeve. Continuously hoist all the guide vanes 5 into the corresponding positions in this way, and remove the hoisting equipment after the hoisting is completed.

Claims

1. A continuous hoisting device for the guide vanes of a pump-turbine. The turbine includes a top cover and guide vanes, and there is a central hole in the center of the top cover. It is characterized in that: The hoisting device is arranged on the bottom surface of the top cover and includes a track, a track connection device, and an electric hoist that slides along the track; The track is a slide rail fixed to the bottom surface of the top cover and arranged in an S shape; among them, the two wings of the S shape are arranged along the inner side of the peripheral edge of the bottom surface of the top cover, and the middle of the S shape is arranged radially along the bottom surface of the top cover and passes through the central hole of the top cover radially; Multiple groups of track connection devices are arranged at intervals, and each group is connected to the top cover and fixed by hanging the track.

2. The continuous hoisting device for the guide vane of a pump-turbine according to claim 1, characterized in that: The track connection device is composed of an upper end cover, a lower end cover, and a track connection seat. The upper end cover is installed on the upper side of the fixed sleeve of the top cover, the lower end cover is installed on the lower side of the fixed sleeve of the top cover, the upper end cover and the lower end cover are fixedly fastened by bolts passing through the fixed sleeve of the top cover, and the track connection seat is welded to the bottom surface of the lower end cover for hanging and supporting connection with the track.

3. The continuous hoisting device for the guide vane of a pump-turbine according to claim 2, characterized in that: The track is composed of multiple separable sections of slide rails, including arc-shaped slide rails with two wings arranged along the inner side of the peripheral edge of the bottom surface of the top cover, and straight slide rails arranged radially along the bottom surface of the top cover and passing through the central hole in the radial direction. Each section of the slide rail is provided with a track connection plate for connecting and fixing with the track connection device.

4. The guide vane continuous hoisting device for a pump-turbine according to claim 3, characterized in that: Blocks for preventing the electric hoist from slipping out are fixedly arranged at the two ends of the S shape of the track.

5. The continuous hoisting device for the guide vane of a pump-turbine according to claim 3, characterized in that: The electric hoist is composed of a traveling drive motor, a drive wheel, a chain guide drive motor, and a sling device. The traveling drive motor is drivingly connected to the drive wheel for driving the electric hoist to move along the S-shaped track, and the chain guide drive motor is used to drive the sling to rise and fall to realize the hoisting of the guide vane.

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