Maintenance fence for top cover of axial-flow movable paddle type water-turbine generator set

Abstract

The top cover serves as one of important parts of the water-turbine generator set, plays an important role in guiding water flow and bearing the weight of a rotating part of the set, and is of an annular structure, an outer ring is fixed to the seat ring, and an inner ring is connected with the supporting cover. In the maintenance period of a unit, after the supporting cover is lifted out, the inner ring of the top cover is adjacent to a foundation pit with the depth of dozens of meters, no protection exists, and the top cover maintenance work is not facilitated. The fence installed on the inner ring of the top cover is designed, the stand columns of the fence are fixed to the bolt holes in the inner ring of the top cover, the stand columns are connected through the three transverse rods, and the fence has the advantages of being easy to disassemble and assemble and firm in erection. The safety protection device is suitable for the field of axial-flow movable paddle type water-turbine generator sets of hydropower stations and is used for edge safety protection of personnel and equipment during top cover maintenance.

Description

Technical Field

[0001] The utility model relates to the field of axial-flow propeller-type water turbine generator sets in hydropower stations, in particular to a top cover maintenance fence of the axial-flow propeller-type water turbine generator set. Background Art

[0002] During unit maintenance, if the turbine needs to be lifted out of the foundation pit for repair, the support cover and all components above it must be lifted out first. Once the support cover is removed, a hole approximately ten meters in diameter will appear within the inner ring of the top cover connected to it, exposing it to the foundation pit several dozen meters deep. This lack of protection makes it difficult to carry out top cover maintenance work. The current measure involves installing two 15m x 7m safety nets within the inner ring of the top cover to prevent the risk of falling.

[0003] Defects and shortcomings of the existing technology: 1. The protective net is a temporary measure, and it is two overlapping sheets, so it is not firmly set up; 2. After the protective net is set up, there is no place to hang a safety belt when people work on the roof; 3. The protective net is made of nylon fiber, which is soft in texture. Once a person falls, he will roll to the center of the protective net in the foundation pit under the influence of gravity, making rescue difficult and putting great psychological pressure on the workers. Utility Model Content

[0004] This patented design features a fence installed on the inner circle of the roof, which can reduce the risk of roof workers working near the edge. It features simple assembly and disassembly, and is securely installed. Workers can also secure their safety belts to the fence, eliminating the risk of falling and alleviating psychological stress.

[0005] In order to solve the above problems, this application is implemented through the following technical solutions:

[0006] A maintenance fence for the top cover of an axial-flow propeller-type hydro-turbine generator set comprises a column, a handle is provided on the top of the column, the handle is screwed and fixedly connected to the top of a first steel pipe, the bottom of the first steel pipe is fixedly connected to a stud, a plurality of plugs are provided on both sides of the first steel pipe, each of the plugs is fixedly connected to the plug rod of a cross bar, the studs are screwed and fixedly connected to the bolt holes of the top cover, and the top cover is fitted and fixedly connected to the inner wall groove of the inner ring flange of the hydro-turbine generator set.

[0007] The top cover is provided with a plurality of evenly distributed bolt holes.

[0008] Every two of the first steel pipes are connected to a plurality of cross bars through a plurality of plugs.

[0009] Both ends of the second steel pipe of the cross bar are fixedly connected with plug rods.

[0010] Three plugs are installed on both sides of each first steel pipe.

[0011] The first steel pipe is a carbon steel seamless steel pipe.

[0012] The handle is a carbon steel seamless steel pipe.

[0013] A column is installed every four bolt holes.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This new type is suitable for occasions near water, edges and where there are fixing bolt holes on the edges of the equipment. Conventional fences are usually erected on horizontal ground and are easily overturned by external forces, and the safety of working near the edges cannot be guaranteed. This device screws the studs into the bolt holes of the top cover to ensure that the upright poles are stable and not easy to overturn. By setting up the circular top cover, the crossbars and columns become a ring-shaped whole with uniform force. When a single crossbar is subjected to force, the force can be transmitted and dispersed to other crossbars and columns, making this device more stable and safe.

[0016] 2. This new type reduces the risk of workers working near the edge during the maintenance of the top cover of the hydro-generator set. By setting handles, studs can be quickly installed and removed, and it has the characteristics of simple disassembly and assembly and firm erection.

[0017] 3. The new column is threadedly fixed to the bolt hole on the inner circle of the top cover, and has the characteristic of firm installation.

[0018] 4. The new plug is fixed to the crossbar and can be installed simply and quickly, and is easy to disassemble. This new type can save maintenance time, thereby shortening equipment maintenance time, allowing power generation equipment to be put into operation as soon as possible, and can be recycled many times.

[0019] 5. The bottom of the upper column of the top cover of this new model can also be connected to a lifting ring buckle with a safety belt to prevent maintenance personnel from falling when performing maintenance work on the inner wall of the turbine generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the cross-sectional structure between the partial upright posts, cross bars and top cover of the fence of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure between the partial upright posts and crossbars of the fence of the present invention;

[0022] Figure 3 It is a schematic diagram of the fence structure of the utility model;

[0023] Figure 4 This is a schematic diagram of the partial structure of the generator of the present invention, wherein the partial inner structure and the partial outer structure are connected with the top cover;

[0024] Figure 5This is a top view of a partially enlarged structure of the connection between the generator and the top cover of the utility model;

[0025] Reference numerals: column 1, first steel pipe 101, stud 102, handle 103, plug 104, cross bar 2, second steel pipe 201, plug 202, top cover 3, bolt hole 301, hydro-generator set 4. DETAILED DESCRIPTION

[0026] It should be understood that the terms "top", "bottom", "both sides", "inner wall", "outer circle", "end", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0027] Example 1

[0028] As above Figures 1 to 5 As shown, a maintenance fence for the top cover of an axial-flow propeller-type hydro-turbine generator set includes a column 1, a handle 103 is installed on the top of the column 1, the handle 103 is screwed and fixedly connected to the top of a first steel pipe 101, the bottom of the first steel pipe 101 is fixedly connected to a stud 102, a plurality of plugs 104 are installed on both sides of the first steel pipe 101, each plug 104 is fixedly plugged into the insertion rod 202 of the cross bar 2, the stud 102 is screwed and fixedly connected to the bolt hole 301 of the top cover 3, and the top cover 3 is fitted and fixedly connected to the inner wall groove of the inner ring flange of the hydro-turbine generator set 4.

[0029] The top cover 3 is provided with a plurality of evenly distributed bolt holes 301. Every two first steel pipes 101 are connected to a plurality of cross bars 2 through a plurality of plugs 104. Both ends of the second steel pipe 201 of the cross bar 2 are fixedly connected to the plug rod 202.

[0030] Each first steel pipe 101 is provided with three plugs 104 on both sides. The first steel pipe 101 is a carbon steel seamless pipe. The handle 103 is also a carbon steel seamless pipe. A column 1 is installed every four bolt holes 301.

[0031] The lower part of the column 1 of the present invention is provided with an externally threaded stud 102 fixed to the inner circle bolt hole 301 of the top cover 3, and the upper part of the column 1 is provided with a handle 103 for easy rotation. Each column 1 is connected by three cross bars 2, and plugs 104 are provided at both ends of the cross bars 2 to fix the side walls of the column 1.

[0032] The column 1 is made of a carbon steel seamless pipe 101, with an externally threaded stud 102 welded to the bottom. A carbon steel seamless pipe is welded to the top of the column 1 as a rotating handle 103. Three sets of 25mm diameter carbon steel seamless pipes are symmetrically welded to the middle of the column 1 as crossbar plugs 104, with two plugs 104 in each set.

[0033] Crossbar 2 is composed of seamless carbon steel pipe 201, with inserts 202 at each end. Inserts 202 are bent tubes. The top cover 3, which serves as the top cover for the hydro-generator 4, is an annular component with an outer diameter of approximately 13 meters, an inner diameter of 10 meters, and a height of 1.3 meters. The inner flange of the hydro-generator 4 has 80 threaded holes 301 evenly distributed on the inner wall groove.

[0034] Connection method: Column 1 connects to bolt holes 301 on top cover 3 via studs 102 with external threads on the bottom. During installation, align studs 102 with bolt holes 301 and rotate handle 103 until secure. Install one bolt every four holes, for a total of 16. After column 1 is installed, insert rods 202 at the top of column 2 into plugs 104 on two adjacent columns 1. Insert three rods in a row from bottom to top, for a total of 48.

[0035] The present invention can also be used for foundation pit cavities similar to the present case, and the crossbar size can be adjusted according to the inner diameter of the foundation pit to match the installation occasion. In addition, the description of the present invention is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the embodiments, or make equivalent replacements for some of the technical features therein, such as the number of columns 1, crossbars 2, and bolt holes 301. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A top cover maintenance fence for an axial-flow propeller-type hydro-turbine generator set, comprising a column (1), characterized in that: The top of the column (1) is provided with a handle (103), the handle (103) is screw-fixedly connected to the top of the first steel pipe (101), the bottom of the first steel pipe (101) is fixedly connected to the stud (102), a plurality of plugs (104) are provided on both sides of the first steel pipe (101), each of the plugs (104) is fixedly connected to the plug rod (202) of the cross bar (2), the stud (102) is screw-fixedly connected to the bolt hole (301) of the top cover (3), and the top cover (3) is fitted and fixedly connected to the inner wall groove of the inner ring flange of the hydro-generator set (4).

2. The top cover maintenance fence of an axial-flow propeller-type hydro-turbine generator set according to claim 1 is characterized in that: The top cover (3) is provided with a plurality of evenly distributed bolt holes (301).

3. The top cover maintenance fence of an axial-flow propeller-type hydro-turbine generator set according to claim 1 is characterized in that: Every two of the first steel pipes (101) are connected to a plurality of cross bars (2) via a plurality of plugs (104).

4. The top cover maintenance fence of an axial-flow propeller-type hydro-turbine generator set according to claim 1 is characterized in that: Both ends of the second steel tube (201) of the crossbar (2) are fixedly connected with an inserting rod (202).

5. The top cover maintenance fence of an axial-flow propeller-type hydro-turbine generator set according to claim 1 is characterized in that: Three plugs (104) are installed on both sides of each first steel pipe (101).

6. The top cover maintenance fence of an axial-flow propeller-type hydro-turbine generator set according to claim 1 is characterized in that: The first steel pipe (101) is a carbon steel seamless steel pipe.

7. The top cover maintenance fence of an axial-flow propeller-type hydro-turbine generator set according to claim 1 is characterized in that: The handle (103) is a carbon steel seamless steel pipe.

8. The top cover maintenance fence of an axial-flow propeller-type hydro-turbine generator set according to claim 1 is characterized in that: A column (1) is installed at every four bolt holes (301).

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