Movable sand blocking ridge device suitable for pumped storage power station

Abstract

The utility model provides a movable sand blocking ridge device suitable for a pumped storage power station. The movable sand blocking ridge device comprises a shore side wall body, a fixed wall body, a sand blocking ridge gate leaf, a vertical shaft and a hydraulic opening and closing device. A fixed wall is arranged on the side, close to the center of the main river channel, of the side type water inlet and outlet, a vertical shaft is rotatably installed in the fixed wall, one end of the sand blocking ridge gate leaf is fixedly connected with the vertical shaft, and the output end of the hydraulic opening and closing device is fixedly connected with the vertical shaft and used for driving the vertical shaft to rotate so as to drive the sand blocking ridge gate leaf to rotate. The operation angle of the sand blocking ridge is changed through the movable sand blocking ridge, so that the water outlet section condition at the water inlet and the water outlet of the pumped storage power station is changed, the problem of sediment deposition at the water inlet and the water outlet is reduced, and the operation efficiency of the pumped storage power station under the water pumping working condition and the power generation working condition is improved; and the influence of abnormal equipment maintenance caused by silt entering an energy storage power station unit is reduced. The sand blocking device is convenient to use, easy to operate, low in cost, obvious in sand blocking effect and high in practicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of sand-trapping dams, and in particular relates to a movable sand-trapping dam device suitable for a pumped-storage power station. Background Art

[0002] In order to protect the normal operation of the plant turbine, conventional pumped-storage power stations usually arrange sand barriers in front of the water inlet and outlet of the lower reservoir. When the pumped-storage power station pumps water, the water in the river passes through the sand barrier to intercept sand before entering the generator set of the pumped-storage power station, thus solving the problem of impurities such as silt entering the generator set and disrupting its normal operation.

[0003] The sand barrier in the prior art is a fixed sand barrier, which has the following problems: (1) The fixed sand barrier consumes a lot of materials and has a poor sand-trapping effect; (2) During long-term operation, sand flowing along the water flow accumulates at the front end of the sand barrier, reducing the sand-trapping effect of the sand barrier; (3) Sediment is deposited at the inlet and outlet of the lower reservoir, causing sediment blockage in front of the inlet and outlet. On the one hand, it causes high-sand content water to flow through the generator set, which can easily damage the generator set; on the other hand, it reduces the water flow capacity in front of the inlet and outlet, affecting the operating efficiency of the pumped-storage power station. Utility Model Content

[0004] In view of the defects in the prior art, the utility model provides a movable sand barrier device suitable for 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 movable sand barrier device suitable for a pumped storage power station, comprising a bank wall (1), a fixed wall (2), a sand barrier door leaf (3), a vertical shaft (4) and a hydraulic opening and closing device (5);

[0007] The bank wall (1) is arranged on the bank side of the side water inlet and outlet of the pumped storage power station, and the fixed wall (2) is arranged on the side of the side water inlet and outlet close to the center of the main river channel. The vertical shaft (4) is rotatably installed in the fixed wall (2), one end of the sand-trapping gate leaf (3) is fixedly connected to the vertical shaft (4), and the output end of the hydraulic opening and closing device (5) is fixedly connected to the vertical shaft (4) for driving the vertical shaft (4) to rotate, thereby driving the sand-trapping gate leaf (3) to rotate toward the center of the main river channel or toward the bank side of the side water inlet and outlet.

[0008] Preferably, the bottom end of the sand-trapping gate leaf (3) is in contact with the riverbed; and the top end of the sand-trapping gate leaf (3) is higher than the water surface of the river.

[0009] Preferably, the sand barrier gate leaf (3) comprises a gate leaf main longitudinal beam (3-1) and a gate leaf horizontal secondary beam (3-2) which are connected and fixed to each other.

[0010] Preferably, it also includes a hinge seat (6), an arc-shaped flange plate (7) and a crank arm (8);

[0011] The two ends of the vertical shaft (4) are each sleeved with a support hinge seat (6) for rotational installation, and the other end of the support hinge seat (6) is embedded and fixed inside the fixed wall (2); the two ends of the vertical shaft (4) are each fixedly installed with an arc flange plate (7), the other end of the arc flange plate (7) is connected to one end of the crank arm (8), and the other end of the crank arm (8) is connected to the output end of the hydraulic opening and closing device (5).

[0012] Preferably, a leaf side water seal (9) is provided at the position where the sand barrier leaf (3) contacts the fixed wall (2); a leaf main water seal (10) is provided at the position where the sand barrier leaf (3) contacts the vertical shaft (4); and a vertical shaft through-wall water seal (11) is provided at the position where the vertical shaft (4) contacts the fixed wall (2).

[0013] Preferably, it further comprises a hydraulically controlled locking valve group (12), wherein the hydraulically controlled locking valve group (12) comprises a pumping condition locking position (12-1) and a draining condition locking position (12-2).

[0014] Preferably, the hydraulic opening and closing device (5) is supported and installed by a fixed base (13).

[0015] The utility model provides a movable sand barrier device suitable for a pumped storage power station, which has the following advantages:

[0016] The utility model provides a movable sand-trapping device suitable for pumped-storage power stations, which is suitable for the construction of pumped-storage power stations in areas with much sediment. The movable sand-trapping device changes the running angle of the sand-trapping device, thereby changing the water outlet section at the water inlet and outlet of the pumped-storage power station, reducing the sediment accumulation problem at the water inlet and outlet, and reducing the sediment accumulation by opening and closing the sand-trapping device, thereby improving the operating efficiency of the pumped-storage power station under the two working conditions of pumping and power generation, and at the same time, reducing the impact of abnormal equipment maintenance caused by sediment entering the power storage power station unit. The utility model is easy to use, simple to operate, low in cost, has obvious sand-trapping effect, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A layout diagram of a movable sand-trapping dam device suitable for a pumped-storage power station provided by the utility model;

[0018] Figure 2A top view of a movable sand-trapping sill device applicable to a pumped-storage power station provided by the utility model;

[0019] Figure 3 The assembly structure diagram of the fixed wall, sand barrier door leaf and vertical axis provided by the utility model;

[0020] Figure 4 The present invention is a schematic diagram of the hydraulic opening and closing device provided by the utility model. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Please refer to the attached drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the attached drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0023] The utility model provides a movable sand-trapping device suitable for pumped-storage power stations, which is suitable for the construction of pumped-storage power stations in areas with much sediment. The movable sand-trapping device changes the running angle of the sand-trapping device, thereby changing the water outlet section at the water inlet and outlet of the pumped-storage power station, reducing the sediment accumulation problem at the water inlet and outlet, and reducing the sediment accumulation by opening and closing the sand-trapping device, thereby improving the operating efficiency of the pumped-storage power station under the two working conditions of pumping and power generation, and at the same time, reducing the impact of abnormal equipment maintenance caused by sediment entering the power storage power station unit. The utility model is easy to use, simple to operate, low in cost, has obvious sand-trapping effect, and is highly practical.

[0024] See also Figure 1 to Figure 4 The utility model provides a movable sand barrier device suitable for a pumped storage power station, comprising a bank wall 1, a fixed wall 2, a sand barrier door leaf 3, a vertical shaft 4 and a hydraulic opening and closing device 5;

[0025] A bank wall 1 is provided on the bank side of the side water inlet and outlet of the pumped storage power station, which is used to extend the side water inlet and outlet 14; a fixed wall 2 is provided on the side of the side water inlet and outlet close to the main river center, and a vertical shaft 4 is rotatably installed in the fixed wall 2, one end of the sand-trapping door leaf 3 is fixedly connected to the vertical shaft 4, and the output end of the hydraulic opening and closing device 5 is fixedly connected to the vertical shaft 4, which is used to drive the vertical shaft 4 to rotate, thereby driving the sand-trapping door leaf 3 to rotate toward the center of the main river or toward the bank side of the side water inlet and outlet. Therefore, the sand-trapping door leaf 3 can rotate at a certain angle under the drive of the hydraulic opening and closing device 5.

[0026] The bottom of the sand barrier gate leaf 3 is in contact with the riverbed; the top of the sand barrier gate leaf 3 is higher than the water surface of the river, thereby achieving an effective sand barrier effect on the river. Figure 3 As shown, the sand barrier gate leaf 3 is a main longitudinal beam structure, including a gate leaf main longitudinal beam 3-1 and a gate leaf horizontal secondary beam 3-2 which are connected and fixed to each other, wherein the gate leaf main longitudinal beam 3-1 and the gate leaf horizontal secondary beam 3-2 are arranged in the same layer to enhance the overall rigidity.

[0027] As a specific structure, the assembly method of the sand barrier door leaf 3, the vertical shaft 4 and the hydraulic opening and closing device 5 can be: it also includes a support hinge seat 6, an arc flange plate 7 and a crank arm 8;

[0028] The two ends of the vertical shaft 4 are respectively sleeved with a rotatable mounting support hinge seat 6, and the other end of the support hinge seat 6 is embedded and fixed inside the fixed wall 2, so that the vertical shaft 4 can rotate relative to the fixed wall 2; the two ends of the vertical shaft 4 are respectively fixedly mounted with an arc-shaped flange plate 7, and the arc-shaped flange plate 7 and the vertical shaft 4 can be stably connected and fixed by a bolt group. The other end of the arc-shaped flange plate 7 is connected to one end of a crank arm 8, and the other end of the crank arm 8 is connected to the output end of the hydraulic opening and closing device 5. A specific assembly method is: the crank arm 8 is a welded box-type structure, and the end is connected to the hanging head of the hydraulic opening and closing device 5 through a pin shaft, and a locking pin shaft hole is provided in the middle part of the top, which is connected to the arc-shaped flange plate 7.

[0029] The vertical axis 4 also has the function of transferring the water pressure load of the sand retaining sill gate leaf 3 to the support hinge seat 6. The support hinge seat 6 bears the load of the vertical axis and transfers the load to the bottom plate concrete structure.

[0030] Furthermore, a water seal device is provided, including: a leaf side water seal 9 is provided at the position where the sand barrier leaf 3 and the fixed wall 2 are in contact; a leaf main water seal 10 is provided at the position where the sand barrier leaf 3 and the vertical shaft 4 are in contact and fixed; and a vertical shaft through-wall water seal 11 is provided at the position where the vertical shaft 4 and the fixed wall 2 are in contact. The leaf side water seal 9 can be fixed between the sand barrier leaf 3 and the fixed wall 2 by bolts to form a sealing surface; the vertical shaft through-wall water seal 11 can be of an inner and outer outer sleeve type, with a rubber sealing ring provided in the middle. The present application does not limit the specific form of the water seal.

[0031] In the present application, a hydraulically controlled locking valve group 12 is provided, and the hydraulically controlled locking valve group 12 includes a pumping condition locking position 12-1 and a drain condition locking position 12-2, so as to realize the position locking of the sand trap door leaf 3 in the pumping condition and the drain condition.

[0032] Therefore, the hydraulic opening and closing device 5 drives the crank arm 8 to drive the vertical shaft 4 to rotate, thereby driving the sand-trapping gate leaf 3 to rotate to control the opening and closing angles of the sand-trapping gate leaf in front of the water inlet and outlet, thereby achieving the function of intercepting sand when pumping water and flushing sand when releasing water, reducing silt accumulation in front of the water inlet and outlet, and reducing the amount of silt entering the generator set.

[0033] The movable sand barrier device suitable for a pumped storage power station provided by the utility model is applied to the pumped storage power station, and combined with Figure 2 , and its usage is:

[0034] (1) The gate leaf 3 of the sand barrier is at the initial position A. When the pumped storage power station is pumping water, the gate leaf 3 of the sand barrier opens a certain angle toward the center of the river channel, rotates to the position C in the figure, and is locked to intercept the sediment flowing from the main river channel to the side inlet and outlet 14. Therefore, after the sediment is intercepted by the gate leaf 3 of the sand barrier, it flows along the main river channel. Figure 2 The pumped water flows in the direction of the arrow to the side water inlet and outlet 14, and finally flows into the generator set. Therefore, by setting the sand barrier gate leaf 3, a certain area of ​​clean water is formed in front of the side water inlet and outlet 14 of the pumped storage power station, reducing the amount of sediment entering the generator set during pumping;

[0035] Therefore, in conjunction with the operation of the pumped storage power station, when the power station is pumping water, the sand barrier is opened to achieve the sand blocking function, reduce the sedimentation in front of the inlet / outlet, and guide the sedimentation position to the center of the river channel, which can also reduce the sedimentation in the river channel;

[0036] (2) The gate leaf 3 of the sand barrier is at the initial position A. When the pumped storage power station releases water, the gate leaf 3 of the sand barrier closes a certain angle toward the river bank, rotates to position B in the figure, and is locked. When the pumped storage power station releases water, the water flows according to Figure 2 The water flows in the direction of the discharge arrow in the figure, and through the rotation of the sand-blocking door leaf 3, the water flow area of ​​the side water inlet and outlet 14 is reduced, and the water flow velocity in the side water inlet and outlet 14 is increased, so as to flush the silt accumulated in front of the side water inlet and outlet 14 and reduce the silt accumulation at the water inlet and outlet of the pumped-storage power station.

[0037] Therefore, when the power station is discharging water to generate electricity, the sand barrier is closed to reduce the water-passing cross-sectional area inside the inlet / outlet, increase the flow velocity of the river channel in front of the inlet / outlet, realize the sand flushing function in front of the inlet / outlet, and further reduce the silt accumulation in front of the inlet / outlet.

[0038] The utility model provides a rotatable and movable sand-trapping bank device. When the pumped-storage power station is pumping water, the gate leaves of the sand-trapping bank are opened to increase the sand-trapping efficiency and effectively trap sand on the outside of the water inlet and outlet. When the pumped-storage power station is releasing water, the gate leaves of the sand-trapping bank are closed to reduce the cross-sectional area in front of the sand-trapping bank, increase the flow rate, achieve the sand flushing effect, reduce siltation, and thus reduce the risk of silt entering the power plant and damaging the unit equipment.

[0039] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A movable sand barrier device suitable for a pumped storage power station, characterized in that: It comprises a bank side wall (1), a fixed wall (2), a sand barrier door leaf (3), a vertical shaft (4) and a hydraulic opening and closing device (5); The bank wall (1) is arranged on the bank side of the side water inlet and outlet of the pumped storage power station, and the fixed wall (2) is arranged on the side of the side water inlet and outlet close to the center of the main river channel. The vertical shaft (4) is rotatably installed in the fixed wall (2), one end of the sand-trapping gate leaf (3) is fixedly connected to the vertical shaft (4), and the output end of the hydraulic opening and closing device (5) is fixedly connected to the vertical shaft (4) for driving the vertical shaft (4) to rotate, thereby driving the sand-trapping gate leaf (3) to rotate toward the center of the main river channel or toward the bank side of the side water inlet and outlet.

2. The movable sand barrier device suitable for a pumped storage power station according to claim 1, characterized in that: The bottom end of the sand-blocking gate leaf (3) is in contact with the riverbed; the top end of the sand-blocking gate leaf (3) is higher than the water surface of the river.

3. The movable sand barrier device suitable for a pumped storage power station according to claim 1, characterized in that: The sand barrier gate leaf (3) comprises a gate leaf main longitudinal beam (3-1) and a gate leaf horizontal secondary beam (3-2) which are connected and fixed to each other.

4. The movable sand barrier device suitable for a pumped storage power station according to claim 1, characterized in that: It also includes a hinge seat (6), an arc-shaped flange plate (7) and a crank arm (8); The two ends of the vertical shaft (4) are each sleeved with a support hinge seat (6) for rotational installation, and the other end of the support hinge seat (6) is embedded and fixed inside the fixed wall (2); the two ends of the vertical shaft (4) are each fixedly installed with an arc flange plate (7), the other end of the arc flange plate (7) is connected to one end of the crank arm (8), and the other end of the crank arm (8) is connected to the output end of the hydraulic opening and closing device (5).

5. The movable sand barrier device suitable for a pumped storage power station according to claim 1, characterized in that: A leaf side water seal (9) is provided at the position where the sand barrier leaf (3) contacts the fixed wall (2); a leaf main water seal (10) is provided at the position where the sand barrier leaf (3) contacts the vertical shaft (4); and a vertical shaft through-wall water seal (11) is provided at the position where the vertical shaft (4) contacts the fixed wall (2).

6. The movable sand barrier device suitable for a pumped storage power station according to claim 1, characterized in that: It also comprises a hydraulically controlled locking valve group (12), wherein the hydraulically controlled locking valve group (12) comprises a water pumping condition locking position (12-1) and a water discharge condition locking position (12-2).

7. The movable sand barrier device suitable for a pumped storage power station according to claim 1, characterized in that: The hydraulic opening and closing device (5) is supported and installed by a fixed base (13).

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