An energy-saving drainage device for construction of traffic tunnels in pumped storage power stations

Abstract

The present invention belongs to the field of drainage technology, and discloses an energy-saving drainage device for the construction of a traffic tunnel of a pumped storage power station, including a sump, and also including: a docking assembly, the docking assembly is fixed on the sump; and a water inlet assembly is installed at the bottom of the docking assembly. The present invention floats on the water surface of the sump through a floating member, so that the water inlet member is located in the water and does not contact the silt at the bottom of the sump. When it is necessary to discharge the accumulated water in the sump, as the water level in the sump continues to move downward, the first sleeve and the second sleeve are gradually pulled out to increase the length, ensuring that the water inlet member is always located in the accumulated water in the sump, thereby achieving the purpose of discharging the accumulated water in the sump. As the water level in the sump gradually rises, the floating member drives the water inlet member to follow the water level rise, so that the second sleeve, the first sleeve and the fixed pipe are contracted, so as to avoid the water inlet member being fixed in the sump, resulting in the silt in the sump covering the water inlet member, resulting in the problem of being unable to drain.

Description

Technical Field

[0001] The invention belongs to the technical field of drainage, and in particular is an energy-saving drainage device for construction of a traffic tunnel in a pumped-storage power station. Background Art

[0002] A pumped-storage power station is a hydroelectric power station that can pump water to an upper reservoir for energy storage. Generally, electricity is used to pump water to the upper reservoir when the power grid load is low, and water is released to the lower reservoir for power generation during the peak load period of the power grid; Traffic tunnels are access passages for equipment and personnel: During the construction and operation of a pumped-storage power station, a large amount of equipment and materials are required, which need to enter the power station through traffic tunnels. At the same time, the maintenance and upkeep of the power station also need to be carried out through traffic tunnels; Ventilation and lighting: Although ventilation tunnels are facilities specifically used to maintain air circulation inside the power station, certain ventilation and lighting requirements are also considered during the design of traffic tunnels to ensure that personnel and equipment can pass through the tunnels safely and comfortably; During the construction and operation of the traffic tunnel of a pumped storage power station, water may accumulate in the traffic tunnel due to geological conditions, rainfall and other factors. By designing a sump, the accumulated water can be effectively collected to prevent water from accumulating in the traffic tunnel and affecting the stability of the traffic tunnel structure. When the water level in the sump is high, a drainage pump is used to discharge it. Since the suction end of the drainage pump is located in the sump for a long time and its position is relatively fixed, a large amount of silt will settle at the bottom of the sump. The silt thickness continues to increase and does not cover the suction end of the drainage pump, making it difficult for the drainage pump to work normally or even damaged. Therefore, an energy-saving drainage device for the construction of a traffic tunnel for a pumped storage power station is proposed. Summary of the invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides an energy-saving drainage device for the construction of a traffic tunnel of a pumped storage power station.

[0004] To achieve the above object, the present invention provides the following technical solution: an energy-saving drainage device for construction of a traffic tunnel of a pumped storage power station, comprising a sump, and further comprising:

[0005] A docking assembly, wherein the docking assembly is fixedly mounted on the sump;

[0006] A water inlet assembly, the water inlet assembly being installed at the bottom of the docking assembly;

[0007] A floating assembly, wherein the floating assembly is fixedly mounted on the top of the water inlet assembly and floats on the water surface of the sump;

[0008] A protection component, the protection component is installed at the bottom of the water inlet component;

[0009] A flushing and silting component, which is installed at the bottom of the docking component and is connected to the water inlet component;

[0010] Wherein, the docking assembly comprises a support frame fixedly mounted on the top of the sump, the support frame is provided with a fixed pipe through a docking plate, and the top of the fixed pipe is provided with a self-priming drainage pump;

[0011] The lower end of the fixed tube is movably sleeved with a first sleeve, the lower end of the first sleeve is movably sleeved with a second sleeve, and the upper ends of the fixed tube and the inner wall of the first sleeve are fixedly mounted with a first limiting ring;

[0012] The water inlet assembly comprises a water inlet member fixedly mounted on the bottom of the second sleeve, and a water inlet is formed in an outer annular array of the water inlet member;

[0013] The floating assembly comprises a docking frame fixedly mounted on the top of the water inlet member, and a floating member is fixedly mounted on the top of the docking frame;

[0014] The floating member floats on the water surface of the sump, so that the water inlet member is located in the accumulated water and does not contact the silt in the sump.

[0015] Preferably, the protection assembly comprises a second limiting ring fixedly mounted on the outside of the water inlet member, the outer annular array of the second limiting ring is provided with a notch, and a movable plate is hinged in the notch;

[0016] A support plate is hinged at the bottom of the movable plate, a middle portion of the support plate is hinged to the bottom of the movable plate, and the support plate maintains a horizontal state.

[0017] Preferably, the movable plate is engaged in the notch to form a circular ring with an "L"-shaped cross section together with the second limiting ring;

[0018] The water inlet member and the protective assembly move downward, and the support plate contacts the silt at the bottom of the sump, so that the movable plate rotates around the hinge with the second limiting ring as the central axis, forming a circular ring with the second limiting ring.

[0019] Preferably, the water inlet assembly further comprises a through hole opened outside the water inlet member, and the through hole is tangent to the bottom of the inner wall of the water inlet member;

[0020] When the self-priming drainage pump stops working, the water in the docking assembly and the water inlet assembly carries the sediment in the water inlet part and flows back through the through hole to be discharged.

[0021] Preferably, a valve pad is installed on the inner wall of the water inlet through a connecting plate, and the valve pad corresponds to the water inlet.

[0022] Preferably, the floating assembly further comprises a through groove opened at the bottom of the docking frame;

[0023] The water inlet component and the floating assembly move upward, and the sediment and accumulated water in the docking frame are discharged through the through groove.

[0024] Preferably, the silt flushing assembly comprises a dispersion pipe fixed to the bottom of the support frame through a connecting frame, a nozzle is arranged outside the dispersion pipe, and a one-way valve is arranged inside the nozzle;

[0025] The outside of the dispersion pipe is connected to a connecting pipe, and the other end of the connecting pipe is connected to the inside of the water inlet member through a connecting hole;

[0026] One end of the connecting pipe is corrugated.

[0027] Preferably, a silt suction pipe is fixedly mounted on the support frame, and a silt removal device is installed on the top of the silt suction pipe.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention uses a floating part to float on the water surface of the sump, so that the water inlet part is located in the water and does not contact the silt at the bottom of the sump. When the accumulated water in the sump needs to be discharged, the self-priming drainage pump is started to pump water from the sump through the fixed pipe, the first sleeve pipe, the second sleeve pipe and the water inlet part. The water in the sump enters the water inlet part and the docking assembly through the water inlet, so that the weight of the water inlet part and the docking assembly gradually increases, driving the water inlet part and the floating part to move downward. As the water level in the sump continues to move downward, the first sleeve pipe and the second sleeve pipe are gradually pulled out to increase their length, ensuring that the water inlet part is always located in the accumulated water in the sump, thereby achieving the purpose of discharging the accumulated water in the sump. As the water level in the sump gradually rises, the water inlet part is driven by the floating part to follow the water level rise, so that the second sleeve pipe, the first sleeve pipe and the fixed pipe are contracted, thereby preventing the water inlet part from being fixed in the sump, resulting in the silt in the sump covering the water inlet part, resulting in the problem of being unable to drain the water.

[0030] The self-priming drainage pump of the present invention draws water from the sump through the docking assembly and the water inlet component. As the water enters the water inlet component and the docking assembly, the water inlet component moves downward under the weight of the water, and the bottom of the support plate contacts the sludge inside the sump. The water inlet component continues to move downward to push the movable plate to rotate at the hinge with the second limiting ring, so that the movable plate and the second limiting ring form a circular ring, and the sludge at the bottom of the sump is blocked by the circular ring, ensuring that the accumulated water in the sump can only enter the water inlet component through the top of the second limiting ring, avoiding the gravel in the sludge from blocking the water inlet, and ensuring the normal operation of the water inlet component, the docking assembly and the drainage pump.

[0031] After the self-priming drainage pump of the present invention completes pumping water from the sump, the docking assembly and the water inlet assembly are stopped working, and part of the water enters the dispersion pipe through the connecting hole and the connecting pipe and is discharged through the nozzle. The discharged water impacts the silt settled at the bottom of the sump, and at the same time, the silt removal equipment is started to extract the silt at the bottom of the sump through the silt suction pipe, and the nozzle pushes the silt at both ends of the bottom of the sump to the middle, thereby improving the silt removal effect of the sump. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the plane structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the appearance structure of the present invention;

[0034] Figure 3 It is a schematic diagram of the appearance structure of the docking assembly, floating assembly, water inlet assembly, protection assembly and flushing and silting assembly of the present invention;

[0035] Figure 4 It is a schematic diagram of the cross-sectional structure of the docking assembly, the water inlet assembly and the flushing and silting assembly of the present invention;

[0036] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0037] Figure 6 It is a schematic diagram of the appearance structure of the floating component, the water inlet component and the protection component of the present invention;

[0038] Figure 7 It is a schematic cross-sectional structure diagram of the floating assembly, the water inlet assembly and the protection assembly of the present invention;

[0039] Figure 8 It is a schematic diagram of the deformation structure of the water inlet component and the protection component of the present invention.

[0040] In the figure: 1. sump; 2. docking assembly; 21. fixed pipe; 22. first sleeve; 23. second sleeve; 24. docking plate; 25. support frame; 26. first limit ring; 3. floating assembly; 31. docking frame; 32. floating part; 33. through groove; 4. water inlet assembly; 41. water inlet part; 42. water inlet; 43. through hole; 44. valve pad; 45. connecting plate; 5. protection assembly; 51. second limit ring; 52. movable plate; 53. support plate; 6. silt suction pipe; 7. silt flushing assembly; 71. connecting frame; 72. connecting pipe; 73. dispersion pipe; 74. nozzle; 75. connecting hole. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] like Figures 1 to 8 As shown, the present invention provides an energy-saving drainage device for construction of a traffic tunnel of a pumped storage power station, comprising a sump 1, and further comprising:

[0043] A docking assembly 2, wherein the docking assembly 2 is fixedly mounted on the sump 1;

[0044] A water inlet assembly 4, which is installed at the bottom of the docking assembly 2;

[0045] The floating component 3 is fixed on the top of the water inlet component 4, and the floating component 3 floats on the water surface of the sump 1;

[0046] A protection component 5, which is installed at the bottom of the water inlet component 4;

[0047] The silt flushing component 7 is installed at the bottom of the docking component 2, and the silt flushing component 7 is connected to the water inlet component 4;

[0048] The docking assembly 2 includes a support frame 25 fixedly mounted on the top of the sump 1, the support frame 25 is equipped with a fixed pipe 21 through a docking plate 24, and a self-priming drainage pump is installed on the top of the fixed pipe 21;

[0049] The lower end of the fixed tube 21 is movably sleeved with a first sleeve 22, and the lower end of the first sleeve 22 is movably sleeved with a second sleeve 23. The upper ends of the inner walls of the fixed tube 21 and the first sleeve 22 are fixedly mounted with a first limiting ring 26.

[0050] The water inlet assembly 4 includes a water inlet member 41 fixed to the bottom of the second sleeve 23, and a water inlet 42 is formed in an outer annular array of the water inlet member 41;

[0051] The floating assembly 3 includes a docking frame 31 fixedly mounted on the top of the water inlet member 41, and a floating member 32 is fixedly mounted on the top of the docking frame 31;

[0052] The floating member 32 floats on the water surface of the sump 1 , so that the water inlet member 41 is located in the accumulated water and does not contact the silt in the sump 1 .

[0053] The floating member 32 floats on the water surface of the sump 1, so that the water inlet member 41 is located in the water and does not contact the silt at the bottom of the sump 1. When the accumulated water in the sump 1 needs to be discharged, the self-priming drainage pump is started to pump water from the sump 1 through the fixed pipe 21, the first sleeve 22, the second sleeve 23 and the water inlet member 41. The water in the sump 1 enters the water inlet member 41 and the docking assembly 2 through the water inlet 42, so that the weight of the water inlet member 41 and the docking assembly 2 gradually increases, driving the water inlet member 41 and the floating member 32 to move downward. As the water level in the sump 1 continues to move downward, the first sleeve 22 and the second sleeve 23 are gradually pulled out to increase their length, ensuring that the water inlet member 41 is always located in the accumulated water in the sump 1, thereby achieving the purpose of discharging the accumulated water in the sump 1;

[0054] As the water level in the sump 1 gradually rises, the floating member 32 drives the water inlet member 41 to rise with the water level, causing the second sleeve 23, the first sleeve 22 and the fixed pipe 21 to shrink, thereby preventing the water inlet member 41 from being fixed in the sump 1, causing the silt in the sump 1 to submerge the water inlet member 41 and causing a problem of being unable to drain water.

[0055] like Figure 5-Figure 8 As shown, the protection assembly 5 includes a second limiting ring 51 fixedly mounted on the outside of the water inlet member 41, and a notch is formed in the outer annular array of the second limiting ring 51, and a movable plate 52 is hinged in the notch;

[0056] The bottom of the movable plate 52 is hinged with a support plate 53, the middle part of the support plate 53 is hinged with the bottom of the movable plate 52, and the support plate 53 maintains a horizontal state;

[0057] The movable plate 52 is engaged in the notch and forms a circular ring with an "L"-shaped cross section with the second limiting ring 51;

[0058] The water inlet member 41 and the protection assembly 5 move downward, and the support plate 53 contacts the silt at the bottom of the sump 1 , so that the movable plate 52 rotates around the hinge with the second limiting ring 51 as the central axis, forming a circular ring with the second limiting ring 51 .

[0059] The self-priming drainage pump draws water from the sump 1 through the docking assembly 2 and the water inlet member 41. As the water enters the water inlet member 41 and the docking assembly 2, the water inlet member 41 moves downward under the weight of the water, and the bottom of the support plate 53 contacts the sludge inside the sump 1. The water inlet member 41 continues to move downward to push the movable plate 52 to rotate at the hinge with the second limiting ring 51, so that the movable plate 52 and the second limiting ring 51 form a circular ring, and the sludge at the bottom of the sump 1 is blocked by the circular ring, ensuring that the accumulated water in the sump 1 can only enter the water inlet member 41 through the top of the second limiting ring 51, avoiding the gravel in the sludge from blocking the water inlet 42, and ensuring the normal operation of the water inlet assembly 4, the docking assembly 2 and the drainage pump;

[0060] As the water in the sump 1 gradually rises, the floating member 32 drives the docking assembly 2 to shrink, pulling the water inlet assembly 4 upward, and the movable plate 52 rotates in the opposite direction and disengages from the slot under the action of the support plate 53.

[0061] like Figure 4-Figure 7 As shown, the water inlet assembly 4 further includes a through hole 43 opened outside the water inlet member 41, and the through hole 43 is tangent to the bottom of the inner wall of the water inlet member 41;

[0062] When the self-priming drainage pump stops working, the water in the docking assembly 2 and the water inlet assembly 4 carries the sediment in the water inlet part 41 and flows back through the through hole 43 to be discharged;

[0063] A valve pad 44 is installed on the inner wall of the water inlet 41 through a connecting plate 45 , and the valve pad 44 corresponds to the water inlet 42 .

[0064] The self-priming drainage pump draws water from the sump 1 through the docking assembly 2 and the water inlet assembly 4. Under the action of suction, the water pushes the valve pad 44 through the water inlet 42 to enter the water inlet 41 and the docking assembly 2 and is discharged. When the self-priming drainage pump stops working, the water in the docking assembly 2 and the water inlet assembly 4 flows back, pushing the valve pad 44 to block the water inlet 42. At the same time, the water flow carries the silt in the water inlet 41 and is discharged through the through hole 43 to prevent the silt in the water inlet 41 from settling.

[0065] At the same time, since the through hole 43 is tangent to the bottom of the inner wall of the water inlet part 41, the water in the sump 1 can enter the water inlet part 41 through the through hole 43 during the water suction process of the self-priming drainage pump, and the bottom of the water inlet part 41 is flushed under the action of the water flow, further preventing mud and sand from settling at the bottom of the water inlet part 41.

[0066] like Figure 6-Figure 8 As shown, the floating assembly 3 also includes a through slot 33 opened at the bottom of the docking frame 31;

[0067] The water inlet member 41 and the floating assembly 3 move upward, and the sediment and accumulated water in the docking frame 31 are discharged through the through groove 33 .

[0068] After the water is pumped out from the sump 1 by the self-priming drainage pump, as the water level in the sump 1 continues to rise, the floating component 32 drives the water inlet component 41 to rise with the water level. During the upward movement, the sediment deposited on the docking frame 31 and located on the top of the water inlet component 41 will be discharged through the through groove 33, thereby reducing the dead weight of the water inlet component 4 and the floating component 3, ensuring that the floating component 3 and the water inlet component 4 can normally rise with the water level.

[0069] like Figure 2-Figure 4 As shown, the silt flushing assembly 7 includes a dispersion pipe 73 fixed to the bottom of the support frame 25 through a connecting frame 71, a nozzle 74 is arranged outside the dispersion pipe 73, and a one-way valve is arranged inside the nozzle 74;

[0070] The outside of the dispersion pipe 73 is connected to a connecting pipe 72, and the other end of the connecting pipe 72 is connected to the inside of the water inlet member 41 through a connecting hole 75;

[0071] One end of the connecting pipe 72 is corrugated;

[0072] A silt suction pipe 6 is fixedly mounted on the support frame 25 , and a silt removal device is mounted on the top of the silt suction pipe 6 .

[0073] After the water is pumped out from the sump 1 by the self-priming drainage pump, part of the water in the docking assembly 2 and the water inlet assembly 4 stops working and enters the dispersion pipe 73 through the connecting hole 75 and the connecting pipe 72 and is discharged through the nozzle 74. The discharged water impacts the silt settled at the bottom of the sump 1. At the same time, the silt removal equipment is started to extract the silt at the bottom of the sump 1 through the silt suction pipe 6, and the nozzle 74 pushes the silt at both ends of the bottom of the sump 1 to the middle, thereby improving the silt removal effect of the sump 1.

[0074] The working principle and use process of the present invention:

[0075] The floating member 32 floats on the water surface of the sump 1, so that the water inlet member 41 is located in the water and does not contact the silt at the bottom of the sump 1. When the accumulated water in the sump 1 needs to be discharged, the self-priming drainage pump is started to pump water from the sump 1 through the fixed pipe 21, the first sleeve 22, the second sleeve 23 and the water inlet member 41. The water in the sump 1 enters the water inlet member 41 and the docking assembly 2 through the water inlet 42, so that the weight of the water inlet member 41 and the docking assembly 2 gradually increases, driving the water inlet member 41 and the floating member 32 to move downward. As the water level in the sump 1 increases, the water level increases. The first sleeve 22 and the second sleeve 23 are gradually pulled out to increase their lengths by continuously moving downward, ensuring that the water inlet 41 is always located in the water in the sump 1, thereby achieving the purpose of draining the water in the sump 1. As the water level in the sump 1 gradually rises, the floating member 32 drives the water inlet 41 to follow the water level rise, causing the second sleeve 23, the first sleeve 22 and the fixed pipe 21 to shrink, thereby preventing the water inlet 41 from being fixed in the sump 1, causing the silt in the sump 1 to cover the water inlet 41, resulting in a problem of being unable to drain water.

[0076] The self-priming drainage pump draws water from the sump 1 through the docking assembly 2 and the water inlet member 41. As the water enters the water inlet member 41 and the docking assembly 2, the water inlet member 41 moves downward under the action of the weight of the water, and the bottom of the support plate 53 contacts the sludge inside the sump 1. The water inlet member 41 continues to move downward to push the movable plate 52 to rotate at the hinge with the second limiting ring 51, so that the movable plate 52 and the second limiting ring 51 form a circular ring, and the sludge at the bottom of the sump 1 is blocked by the circular ring to ensure that the accumulated water in the sump 1 can only enter the water inlet member 41 through the top of the second limiting ring 51, and prevent the gravel in the sludge from blocking the water inlet 42, so as to ensure the normal operation of the water inlet assembly 4, the docking assembly 2 and the drainage pump. As the accumulated water in the sump 1 gradually increases, the docking assembly 2 is driven to shrink under the action of the floating member 32, and the water inlet assembly 4 is pulled upward. The movable plate 52 rotates in the opposite direction and disengages from the slot under the action of the support plate 53;

[0077] The self-priming drainage pump draws water from the sump 1 through the docking component 2 and the water inlet component 4. Under the action of suction, the water passes through the water inlet 42 and pushes the valve pad 44 to enter the water inlet 41 and the docking component 2 and is discharged. When the self-priming drainage pump stops working, the water in the docking component 2 and the water inlet component 4 flows back, pushing the valve pad 44 to block the water inlet 42. At the same time, the water flow carries the sediment in the water inlet 41 and is discharged through the through hole 43 to avoid the sedimentation of the sediment in the water inlet 41. At the same time, because the through hole 43 is tangent to the bottom of the inner wall of the water inlet 41, the water in the sump 1 can enter the water inlet 41 through the through hole 43 during the water suction process of the self-priming drainage pump. Under the action of the water flow, the bottom of the water inlet 41 is flushed, further preventing the sedimentation of sediment at the bottom of the water inlet 41.

[0078] After the water is pumped out from the sump 1 by the self-priming drainage pump, part of the water in the docking assembly 2 and the water inlet assembly 4 is stopped and enters the dispersion pipe 73 through the connecting hole 75 and the connecting pipe 72 and is discharged through the nozzle 74. The discharged water impacts the silt settled at the bottom of the sump 1, and at the same time, the silt removal equipment is started to extract the silt at the bottom of the sump 1 through the silt suction pipe 6.

[0079] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0080] 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. An energy-saving drainage device for construction of a traffic tunnel in a pumped storage power station, comprising a sump (1), characterized in that: Also includes: A docking assembly (2), the docking assembly (2) being fixedly mounted on the sump (1); A water inlet assembly (4), the water inlet assembly (4) being mounted on the bottom of the docking assembly (2); A floating assembly (3), the floating assembly (3) being fixedly mounted on the top of the water inlet assembly (4), and the floating assembly (3) floating on the water surface of the sump (1); A protection component (5), the protection component (5) being installed at the bottom of the water inlet component (4); A flushing and silting component (7), the flushing and silting component (7) being mounted on the bottom of the docking component (2), the flushing and silting component (7) being in communication with the water inlet component (4); The docking assembly (2) comprises a support frame (25) fixedly mounted on the top of the sump (1); the support frame (25) is provided with a fixed pipe (21) via a docking plate (24); and a self-priming drainage pump is mounted on the top of the fixed pipe (21); The lower end of the fixed tube (21) is movably sleeved with a first sleeve (22), the lower end of the first sleeve (22) is movably sleeved with a second sleeve (23), and the upper ends of the inner walls of the fixed tube (21) and the first sleeve (22) are fixedly mounted with a first limiting ring (26); The water inlet assembly (4) comprises a water inlet component (41) fixedly mounted on the bottom of the second sleeve (23), and a water inlet (42) is formed in an outer annular array of the water inlet component (41); The floating assembly (3) comprises a docking frame (31) fixedly mounted on the top of the water inlet member (41), and a floating member (32) is fixedly mounted on the top of the docking frame (31); The floating member (32) floats on the water surface of the sump (1), so that the water inlet member (41) is located in the accumulated water and does not contact the silt in the sump (1); The protection component (5) comprises a second limiting ring (51) fixedly mounted on the outside of the water inlet member (41); a notch is formed in the outer annular array of the second limiting ring (51); a movable plate (52) is hinged in the notch; A support plate (53) is hingedly connected to the bottom of the movable plate (52); a middle portion of the support plate (53) is hingedly connected to the bottom of the movable plate (52); and the support plate (53) maintains a horizontal state; The movable plate (52) is engaged in the notch to form a circular ring with an "L"-shaped cross section together with the second limiting ring (51); The water inlet member (41) and the protective assembly (5) move downward, and the support plate (53) contacts the silt at the bottom of the sump (1), so that the movable plate (52) rotates around the hinged portion with the second limiting ring (51) as the central axis, forming a circular ring with the second limiting ring (51).

2. The energy-saving drainage device for construction of a traffic tunnel for a pumped storage power station according to claim 1 is characterized in that: The water inlet component (4) further comprises a through hole (43) formed outside the water inlet component (41), wherein the through hole (43) is tangent to the bottom of the inner wall of the water inlet component (41); When the self-priming drainage pump stops working, water in the docking assembly (2) and the water inlet assembly (4) carries the sediment in the water inlet member (41) backflowing and is discharged through the through hole (43).

3. The energy-saving drainage device for construction of a traffic tunnel for a pumped storage power station according to claim 2 is characterized by: A valve pad (44) is installed on the inner wall of the water inlet (41) via a connecting plate (45), and the valve pad (44) corresponds to the water inlet (42).

4. The energy-saving drainage device for construction of a traffic tunnel for a pumped storage power station according to claim 1, characterized in that: The floating assembly (3) further comprises a through groove (33) formed at the bottom of the docking frame (31); The water inlet component (41) and the floating assembly (3) move upward, and the sediment and accumulated water settled in the docking frame (31) are discharged through the through groove (33).

5. The energy-saving drainage device for construction of a traffic tunnel for a pumped storage power station according to claim 3 is characterized by: The silt flushing assembly (7) comprises a dispersion pipe (73) fixed to the bottom of the support frame (25) via a connecting frame (71), a nozzle (74) is arranged outside the dispersion pipe (73), and a one-way valve is arranged inside the nozzle (74); The outside of the dispersion pipe (73) is connected to a connecting pipe (72), and the other end of the connecting pipe (72) is connected to the inside of the water inlet member (41) through a communicating hole (75); One end of the connecting pipe (72) is corrugated.

6. The energy-saving drainage device for construction of a traffic tunnel for a pumped storage power station according to claim 5, characterized in that: A silt suction pipe (6) is fixedly mounted on the support frame (25), and a silt removal device is mounted on the top of the silt suction pipe (6).

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