Temporary sand blocking device for trash rack at water inlet and outlet of lower reservoir of pumped storage power station

Abstract

The utility model provides a temporary sand blocking device for a trash rack at a water inlet and a water outlet of a lower reservoir of a pumped storage power station. The temporary sand blocking device comprises a sand blocking door, a hanging body device and a guiding and positioning device, the sand blocking door is arranged in a lower reservoir water inlet and outlet door groove, and a hanging body device and a guiding and positioning device are fixedly installed at the top of the sand blocking door. The guiding and positioning device is matched with a guiding and positioning hole formed in the bottom of the trash rack; the hanging body device is matched with a clamping groove formed in the bottom of the trash rack; and the sand blocking door is positioned below the trash rack. When the sediment content of the water inlet and the water outlet of the lower reservoir of the pumped storage power station exceeds the standard, the temporary sediment blocking device is arranged below the bottom grid blade of the trash rack, the sediment blocking door serves as a temporary sediment blocking building, the situation that sediment in the lower reservoir enters a flow channel under the non-power-generation working condition is reduced to the maximum extent, and the sediment deposition phenomenon in areas such as a diversion tunnel is avoided. The device has the advantages of simplicity and convenience in use and operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of pumped storage, and in particular relates to a temporary sand retaining device for a trash rack at a water inlet and outlet of a lower reservoir of a pumped storage power station. Background Art

[0002] The water inlet and outlet of the lower reservoir of the pumped-storage power station is located upstream of the maintenance gate. The water diversion tunnel is located between the water inlet and outlet of the lower reservoir and the maintenance gate. At present, a trash rack is arranged in the inlet and outlet gate groove. The trash rack opens and closes in static water. Its main function is to block debris that may enter the water diversion tunnel, such as branches, miscellaneous wood, aquatic plants and floating ice, so as to protect the normal operation of equipment such as turbines, gates and pipelines.

[0003] When a pumped-storage power station encounters a severe flood and the sediment in the reservoir below the pumped-storage power station seriously exceeds the standard, it is easy to cause serious sedimentation in areas such as the water diversion tunnel, and it is very difficult to carry out sedimentation treatment operations in the water diversion tunnel. Utility Model Content

[0004] In view of the defects in the prior art, the utility model provides a temporary sand retaining device for a trash rack at the water inlet and outlet of the lower reservoir of a pumped storage power station, which can effectively solve the above problems.

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

[0006] The utility model provides a temporary sand-blocking device for a trash rack at the water inlet and outlet of a lower reservoir of a pumped storage power station, comprising a sand-blocking door (1), a hanging device (2) and a guiding and positioning device (3);

[0007] The sand-trapping gate (1) is arranged in the gate groove of the water inlet and outlet of the lower reservoir; the hanging device (2) and the guiding and positioning device (3) are fixedly installed on the top of the sand-trapping gate (1); the guiding and positioning device (3) matches the guiding and positioning hole (4-1) opened at the bottom of the trash rack (4); the hanging device (2) matches the card slot (4-2) opened at the bottom of the trash rack (4); the sand-trapping gate (1) is located below the trash rack (4), and the guiding and positioning device (3) is embedded in the guiding and positioning hole (4-1), so that the hanging device (2) is carded into the card slot (4-2).

[0008] Preferably, the sand-trapping gate is a flat steel gate.

[0009] Preferably, the sand-trapping gate (1) comprises a sand-trapping panel (1-1), a main beam (1-2) and a vertical secondary beam (1-3);

[0010] The sand retaining panel (1-1) is arranged vertically, and two main beams (1-2) are arranged on the rear side of the sand retaining panel (1-1); the two main beams (1-2) are arranged vertically and in parallel; and a plurality of vertical secondary beams (1-3) are arranged at intervals between the two main beams (1-2).

[0011] Preferably, the main beam (1-2) and the vertical secondary beam (1-3) are both provided with water leakage holes (1-4).

[0012] Preferably, the bottom of the vertical secondary beam (1-3) is wedge-shaped.

[0013] Preferably, the guiding and positioning device (3) comprises a first support seat (3-1), a guiding and positioning column (3-2) and a first reinforcing rib (3-3);

[0014] The guide positioning column (3-2) is welded to the center of the first support seat (3-1); and the first reinforcing rib (3-3) is welded around the bottom of the guide positioning column (3-2).

[0015] Preferably, the hanging device (2) comprises a second support seat (2-1), a hanging body (2-2) and a second reinforcing rib (2-3);

[0016] The hanging body (2-2) is welded to the center of the second supporting seat (2-1); and the second reinforcing ribs (2-3) are welded around the bottom of the hanging body (2-2).

[0017] The utility model provides a temporary sand retaining device for trash racks at the water inlet and outlet of the lower reservoir of a pumped storage power station, which has the following advantages:

[0018] The utility model provides a temporary sand retaining device for the trash rack at the water inlet and outlet of the lower reservoir of a pumped storage power station. When the sediment content at the water inlet and outlet of the lower reservoir of the pumped storage power station exceeds the standard, the temporary sand retaining device is arranged under the bottom grid leaves of the trash rack, so that the sand retaining gate acts as a temporary sand retaining structure, thereby minimizing the entry of sediment from the lower reservoir into the flow channel under non-power generation conditions, and avoiding sedimentation in areas such as water diversion tunnels.

[0019] The utility model provides a temporary sand retaining device for a trash rack at a water inlet and outlet of a lower reservoir of a pumped storage power station, which has the advantages of being simple and convenient to use and operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional view of the front direction of the temporary sand retaining device provided by the utility model;

[0021] Figure 2 A three-dimensional diagram of the temporary sand retaining device provided by the utility model from the back;

[0022] Figure 3A three-dimensional diagram of the temporary sand retaining device provided by the utility model from an upward angle;

[0023] Figure 4 A three-dimensional diagram of the hanging device provided by the utility model;

[0024] Figure 5 A three-dimensional diagram of the guiding and positioning device provided by the utility model;

[0025] Figure 6 A first stereoscopic view of the trash rack provided by the utility model;

[0026] Figure 7 A second stereoscopic view of the trash rack provided by the utility model;

[0027] Figure 8 An assembly diagram of the temporary sand retaining device and trash rack provided by the utility model;

[0028] Fig. 9 The utility model is provided with a temporary sand retaining device and a trash rack. The utility model is provided with a front view after being assembled. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] See also Figures 1 to 9 The utility model provides a temporary sand retaining device for a trash rack at the water inlet and outlet of a lower reservoir of a pumped storage power station, comprising a sand retaining door 1, a hanging device 2 and a guiding and positioning device 3;

[0031] See also Figures 1 to 3 , which is the structure of a temporary sand retaining device of a trash rack. The sand retaining gate is a flat steel gate. The sand retaining gate 1 is arranged in the gate slot of the water inlet and outlet of the lower reservoir. A hanging device 2 and a guide positioning device 3 are fixedly installed on the top of the sand retaining gate 1; the guide positioning device 3 matches the guide positioning hole 4-1 opened at the bottom of the trash rack 4; the hanging device 2 matches the card slot 4-2 opened at the bottom of the trash rack 4; refer to Figure 6 and Figure 7 , is the structure of the trash rack 4; the sand trap door 1 is located below the trash rack 4, and the guide positioning device 3 is embedded in the guide positioning hole 4-1, so that the hanging device 2 is inserted into the card slot 4-2. Figure 8 and Fig. 9 , which is the assembly drawing of the temporary sand retaining device of the trash rack and the trash rack;

[0032] The structure of the sand-trapping gate 1 has no water-sealing device, and includes a sand-trapping panel 1-1, a main beam 1-2, and a vertical secondary beam 1-3; the sand-trapping panel 1-1 is vertically arranged, and two main beams 1-2 are arranged on the rear side of the sand-trapping panel 1-1; the two main beams 1-2 are arranged in parallel up and down; and a plurality of vertical secondary beams 1-3 are arranged at intervals between the two main beams 1-2. Both the main beam 1-2 and the vertical secondary beam 1-3 are provided with leakage holes 1-4 to facilitate the flow of water and silt, on the one hand, to reduce the impact of silt on the sand-trapping panel 1-1; on the other hand, when the trash rack 4 is dropped above the sand-trapping gate 1, if there is silt in the bottom door leaf of the trash rack 4, this part of the silt can be discharged through the leakage holes 1-4, so that the trash rack 4 can smoothly fall onto the sand-trapping gate 1. The bottom of the vertical secondary beam 1-3 is wedge-shaped, which is convenient for the sand-trapping gate 1 to fall into the bottom of the door groove.

[0033] See also Figure 5 The guiding and positioning device 3 includes a first support seat 3-1, a guiding and positioning column 3-2 and a first reinforcing rib 3-3; the guiding and positioning column 3-2 is welded at the center of the first support seat 3-1; and the first reinforcing rib 3-3 is welded around the bottom of the guiding and positioning column 3-2.

[0034] See also Figure 4 The hanging device 2 includes a second support seat 2-1, a hanging body 2-2 and a second reinforcing rib 2-3; the hanging body 2-2 is welded to the center of the second support seat 2-1; and the second reinforcing rib 2-3 is welded around the bottom of the hanging body 2-2.

[0035] The utility model provides a temporary sand retaining device for a trash rack at the water inlet and outlet of a lower reservoir of a pumped storage power station, and the method of using the device is as follows:

[0036] 1. Under normal circumstances, a trash rack 4 is arranged in the gate slot of the water inlet and outlet of the lower reservoir of the pumped storage power station to block the debris that may enter the water diversion tunnel;

[0037] 2. When the sediment content at the water inlet and outlet of the lower reservoir of the pumped storage power station exceeds the standard, first lift the trash rack 4 to a certain height, and then use the automatic hook beam to place the temporary sand retaining device of the present application under the trash rack 4; then drop the trash rack 4, and in the process of dropping the trash rack 4, direct the drop of the trash rack 4 through the guide positioning device 3. When the trash rack 4 falls into place, the guide positioning device 3 of the temporary sand retaining device is embedded in the guide positioning hole 4-1 of the trash rack 4, and the hanging device 2 of the temporary sand retaining device is inserted into the card slot 4-2 at the bottom of the trash rack 4, so as to realize the connection between the temporary sand retaining device and the trash rack 4.

[0038] When the temporary sand retaining device is assembled in place, the sand retaining panel 1-1 of the temporary sand retaining device blocks the passage of silt in the water, and the water flow can flow into the water diversion tunnel through the trash rack 4, which is convenient for subsequent silt cleaning. At the same time, the trash rack 4 above blocks the debris that may enter the water diversion tunnel.

[0039] In the present application, by providing leakage holes 1-4 in the main beam 1-2 and the vertical secondary beam 1-3 of the temporary sand retaining device, the impact of sediment on the sand retaining panel 1-1 can be reduced.

[0040] By installing a temporary sand retaining device, the amount of sediment entering the water diversion tunnel can be effectively reduced, and sediment accumulation in the water diversion tunnel and other areas can be avoided. The sediment blocked in front of the temporary sand retaining device is very easy to clean.

[0041] 3. When the sediment content is reduced to a normal value, first lift the trash rack 4, then use the automatic hook beam to lift away the temporary sand retaining device, and then drop the trash rack 4, which is easy to operate.

[0042] The utility model provides a temporary sand retaining device for the trash rack at the water inlet and outlet of the lower reservoir of a pumped storage power station. When the sediment content at the water inlet and outlet of the lower reservoir of the pumped storage power station exceeds the standard, the temporary sand retaining device is arranged under the bottom grid leaves of the trash rack, so that the sand retaining gate acts as a temporary sand retaining structure, thereby minimizing the entry of sediment from the lower reservoir into the flow channel under non-power generation conditions, and avoiding sedimentation in areas such as water diversion tunnels.

[0043] The utility model provides a temporary sand retaining device for a trash rack at a water inlet and outlet of a lower reservoir of a pumped storage power station, which has the advantages of being simple and convenient to use and operate.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A temporary sand retaining device for trash racks at the water inlet and outlet of the lower reservoir of a pumped storage power station, characterized in that: It comprises a sand-trapping gate (1), a hanging device (2) and a guiding and positioning device (3); The sand-trapping gate (1) is arranged in the gate groove of the water inlet and outlet of the lower reservoir; the hanging device (2) and the guiding and positioning device (3) are fixedly installed on the top of the sand-trapping gate (1); the guiding and positioning device (3) matches the guiding and positioning hole (4-1) opened at the bottom of the trash rack (4); the hanging device (2) matches the card slot (4-2) opened at the bottom of the trash rack (4); the sand-trapping gate (1) is located below the trash rack (4), and the guiding and positioning device (3) is embedded in the guiding and positioning hole (4-1), so that the hanging device (2) is carded into the card slot (4-2).

2. A temporary sand retaining device for trash racks at the water inlet and outlet of the lower reservoir of a pumped storage power station according to claim 1, characterized in that: The sand-trapping gate is a flat steel gate.

3. A temporary sand retaining device for trash racks at the water inlet and outlet of the lower reservoir of a pumped storage power station according to claim 1, characterized in that: The sand-trapping gate (1) comprises a sand-trapping panel (1-1), a main beam (1-2) and a vertical secondary beam (1-3); The sand retaining panel (1-1) is arranged vertically, and two main beams (1-2) are arranged on the rear side of the sand retaining panel (1-1); the two main beams (1-2) are arranged vertically and in parallel; and a plurality of vertical secondary beams (1-3) are arranged at intervals between the two main beams (1-2).

4. A temporary sand retaining device for trash racks at the water inlet and outlet of the lower reservoir of a pumped storage power station according to claim 3, characterized in that: The main beam (1-2) and the vertical secondary beam (1-3) are both provided with water leakage holes (1-4).

5. A temporary sand retaining device for trash racks at the water inlet and outlet of the lower reservoir of a pumped storage power station according to claim 3, characterized in that: The bottom of the vertical secondary beam (1-3) is wedge-shaped.

6. A temporary sand retaining device for trash racks at the water inlet and outlet of the lower reservoir of a pumped storage power station according to claim 1, characterized in that: The guiding and positioning device (3) comprises a first support seat (3-1), a guiding and positioning column (3-2) and a first reinforcing rib (3-3); The guide positioning column (3-2) is welded to the center of the first support seat (3-1); and the first reinforcing rib (3-3) is welded around the bottom of the guide positioning column (3-2).

7. A temporary sand retaining device for trash racks at the water inlet and outlet of the lower reservoir of a pumped storage power station according to claim 1, characterized in that: The hanging body device (2) comprises a second support seat (2-1), a hanging body (2-2) and a second reinforcing rib (2-3); The hanging body (2-2) is welded to the center of the second supporting seat (2-1); and the second reinforcing ribs (2-3) are welded around the bottom of the hanging body (2-2).

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