Open spillway capable of spilling spillways through surface holes

Abstract

The invention discloses a spillway for open surface hole spillway, and relates to the technical field of spillways, the spillway comprises a dam body, a spillway hole is formed in the side wall of the dam body, the spillway hole penetrates through the dam body, and the spillway is arranged on the side wall of the dam body; the cleaning mechanism comprises a filter screen fixedly connected to the inner wall of the spillway tunnel, two sewage discharge grooves are symmetrically formed in the inner wall of the spillway tunnel, sealing plates are connected to the inner walls of the two sewage discharge grooves in a sealed and sliding mode, the number of the sealing plates is two, and storage wells are formed in the bottoms of the interiors of the sewage discharge grooves; the inner walls of the two sewage discharge grooves are jointly and rotationally connected with a reciprocating lead screw, the side wall of the reciprocating lead screw is in threaded connection with the sealing plate, and the inner walls of the sewage discharge grooves are fixedly connected with sliding rods. When sludge is accumulated on one side of the filter screen to a certain degree, the sealing plate can automatically push the sludge into the storage well, so that the sludge accumulated in the spillway tunnel can be removed in real time, and the flood discharge capacity of the spillway tunnel is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of spillways, in particular to an open surface-hole spillway. Background Art

[0002] The spillway is a flood control device for water conservancy structures such as reservoirs. It is usually built on one side of the dam, like a large trough. When the water level in the reservoir exceeds the safety limit, the water flows downstream from the spillway to prevent the dam from being destroyed.

[0003] At present, a spillway is usually opened on the dam body for surface spillway. When the water level on one side of the dam body exceeds the spillway, the water will flow out through the spillway and enter the spillway for flood discharge. When the existing spillway is discharging flood, there will be a large amount of sludge in the flood. In order to prevent the sludge from entering the downstream river channel with the flood and causing the downstream river channel to be damaged by greater pressure, a filter is usually set in the spillway to intercept the sludge. Intercepting the sludge in the spillway will cause the sludge to accumulate in the spillway. During flood discharge, workers or sewage cleaning equipment cannot enter the spillway, which will cause the spillway to be blocked and reduce the flood discharge capacity of the spillway. In addition, the existing spillway is usually a smooth slope without any flow-blocking device. The flood enters the spillway from the spillway and pours into the downstream river channel from the spillway. At this time, the flood has a faster speed and a greater impact force, which will cause a great impact on the downstream river channel and may damage the downstream river channel.

[0004] Based on this, we propose an open surface spillway. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an open surface hole spillway.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The open-type surface-hole spillway comprises a dam body, a spillway tunnel is provided on the side wall of the dam body, the spillway tunnel runs through the dam body, and the spillway is provided on the side wall of the dam body; The cleaning mechanism comprises a filter screen fixedly connected to the inner wall of the spillway tunnel, the inner wall of the spillway tunnel is symmetrically provided with two sewage troughs, the inner walls of the two sewage troughs are both sealed and slidably connected with sealing plates, the number of the sealing plates is three, a storage well is provided at the bottom of the sewage trough, the inner walls of the two sewage troughs are rotatably connected with a reciprocating screw, the side wall of the reciprocating screw is threadedly connected with the sealing plate, the inner wall of the sewage trough is fixedly connected with a sliding rod, the side wall of the sealing plate is slidably connected with the sliding rod, one of the inner walls of the sewage trough is rotatably connected with a hollow rotating shaft, the hollow rotating shaft is sleeved on the side wall of the reciprocating screw, the inner wall of the spillway tunnel is rotatably connected with a first rotating rod, the side wall of the first rotating rod is fixedly connected with a plurality of impellers, two cavities are symmetrically provided in the dam body, the two cavities are respectively connected with the two sewage troughs, one end of the first rotating rod extends into the cavity and is fixedly connected with a driving wheel, the side wall of the hollow rotating shaft is fixedly connected with a driven wheel, and the driving wheel is connected with the driven wheel through a synchronous belt; A pressure-sensing control mechanism is installed on the hollow rotating shaft.

[0007] Preferably, the pressure-sensitive control mechanism includes two grooves symmetrically opened on the inner wall of the hollow rotating shaft, the inner walls of the two grooves are slidably connected with magnetic columns, the side wall of the reciprocating screw is provided with a plurality of slots cooperating with the magnetic columns, the inner wall of the groove is fixedly connected with an electromagnet, and a first spring is fixedly connected between the inner wall of the groove and the magnetic column.

[0008] Preferably, the pressure-sensitive control mechanism also includes a driving block slidably connected to the top of the spillway, the upper end of the driving block is arranged through the upper end of the dam body, a plurality of second springs are fixedly connected to the top of the driving block and the upper end of the dam body, the upper end of the dam body is fixedly connected to a delay switch through a bracket, and the electromagnet, the delay switch and the external power supply are electrically connected through wires.

[0009] Preferably, a flow-slowing mechanism is installed on the spillway, and the flow-slowing mechanism includes four flow-slowing plates slidably connected to the inner wall of the spillway, and one end of the flow-slowing plate is arranged to penetrate the side wall of the spillway.

[0010] Preferably, the flow slowing mechanism also includes two second rotating rods symmetrically rotatably connected to the side walls of the dam body, the side walls of the second rotating rods are fixedly connected to a driving rod, the side walls of the baffle are fixedly connected to a connecting rod, the side walls of the connecting rods are fixedly connected to a limiting rod, the side walls of the driving rods are symmetrically provided with two limiting grooves, and the side walls of the limiting rods are slidably connected to the inner walls of the limiting grooves.

[0011] Preferably, a driving mechanism is installed on the dam body, and the driving mechanism includes two installation cavities symmetrically opened in the dam body, one end of the second rotating rod extends into the installation cavity and is fixedly connected to the first bevel gear, the inner wall of the installation cavity is rotatably connected to the third rotating rod, the side wall of the third rotating rod is fixedly connected to an incomplete bevel gear matching the first bevel gear, the side wall of the second rotating rod is sleeved with a torsion spring, and the two ends of the torsion spring are respectively fixedly connected to the side wall of the dam body and the driving rod.

[0012] Preferably, the driving mechanism further comprises a second bevel gear fixedly connected to the side wall of the first rotating rod, one end of the third rotating rod extends into the cavity and is fixedly connected to the third bevel gear, and the second bevel gear is meshingly connected to the third bevel gear.

[0013] Preferably, a plurality of drainage holes are opened on the inner wall of the storage well, and the other ends of the plurality of drainage holes are arranged through the side wall of the dam body.

[0014] Preferably, two artificial shafts are symmetrically opened at the upper end of the dam body, and the lower ends of the artificial shafts are connected to the sewage trough.

[0015] The present invention has the following beneficial effects: 1. By setting up a cleaning mechanism and a pressure-sensitive control mechanism, when the sludge accumulates to a certain extent on one side of the filter, the sealing plate will automatically push the sludge into the storage well, and then the sludge accumulated in the spillway can be cleared in real time to ensure the flood discharge capacity of the spillway; 2. Using the impact force of water flow during flood discharge to clean up the sludge can convert part of the kinetic energy of the water flow, which can reduce the kinetic energy of the water flow and the impact force on the one hand, and save energy on the other hand; 3. By setting up a slow flow mechanism, after the water enters the spillway, it will be blocked by multiple baffles in a stepped manner, thereby reducing the flow velocity and impact of the water layer by layer, avoiding excessive flow velocity and impact during flood discharge, which may cause damage to the downstream river channel; 4. By setting up a driving mechanism, when the water flow hits the spoiler, strong splashing and ejection will be generated, and the surface of the water flow will roll and surge, forming a large-scale vortex motion at the position where the spoiler and the inner wall of the spillway form an angle of 90 degrees. When the rolling and surging water flow turns to the spoiler of the lower layer in the form of an open flow, its water flow pattern will be very unstable, and the splashing and ejecting water body hitting the spoiler and the inner wall of the spillway will have a great impact on their structure. At this time, the spoiler on the same side will be alternately extended and retracted, so that the water flow does not have enough time to form a large-scale vortex motion at the position where the spoiler and the inner wall of the spillway form an angle of degrees, thereby reducing the surging and impact of the water flow, making the water flow pattern more stable, and the spoiler alternately blocks the flow, further enhancing the layer-by-layer deceleration effect on the water flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A schematic diagram of the three-dimensional structure of the open surface spillway proposed in the present invention; Figure 2 for Figure 1 A rear view schematic diagram of the structure in the middle; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the middle dam body; Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the middle dam body; Figure 5 for Figure 1 A schematic diagram of the structure enlargement at point A; Figure 6 for Figure 3 A schematic diagram of the structure at B in FIG. Figure 7 for Figure 4 A schematic diagram of the structure at position C in FIG. Figure 8 for Figure 4 Schematic diagram of the enlarged structure at D in the figure.

[0017] In the figure: 1, dam body; 2, spillway; 3, spillway; 4, filter; 5, sewage trough; 6, sealing plate; 7, storage well; 8, reciprocating screw; 9, hollow shaft; 10, first rotating rod; 11, impeller; 12, cavity; 13, driving wheel; 14, driven wheel; 15, groove; 16, magnetic column; 17, slot; 18, electromagnet; 19, first spring; 20, driving block; 21, second spring; 22, delay switch; 23, baffle; 24, second rotating rod; 25, driving rod; 26, connecting rod; 27, limiting rod; 28, limiting slot; 29, installation cavity; 30, first bevel gear; 31, third rotating rod; 32, incomplete bevel gear; 33, torsion spring; 34, second bevel gear; 35, third bevel gear; 36, drainage hole; 37, artificial shaft; 38, slide rod. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0019] Reference Figure 1 - Figure 8 The open-type surface-hole spillway comprises a dam body 1, a spillway 2 is provided on the side wall of the dam body 1, the spillway 2 runs through the dam body 1, and a spillway 3 is provided on the side wall of the dam body 1; The cleaning mechanism includes a filter screen 4 fixedly connected to the inner wall of the spillway 2. Two drainage grooves 5 are symmetrically provided on the inner wall of the spillway 2. The inner walls of the two drainage grooves 5 are sealed and slidably connected with sealing plates 6. The number of sealing plates 6 is three. A storage well 7 is provided at the bottom of the drainage groove 5. The inner walls of the two drainage grooves 5 are connected to a reciprocating screw 8 for rotation together. The side wall of the reciprocating screw 8 is threadedly connected to the sealing plate 6. The inner wall of the drainage groove 5 is fixedly connected with a sliding rod 38. The side wall of the sealing plate 6 is slidably connected to the sliding rod 38. One of the drainage grooves 5 is rotatably connected to the inner wall of the dam 1, and the hollow rotating shaft 9 is sleeved on the side wall of the reciprocating screw 8. The inner wall of the spillway 2 is rotatably connected to the first rotating rod 10, and the side wall of the first rotating rod 10 is fixedly connected to multiple impellers 11. Two cavities 12 are symmetrically opened in the dam body 1, and the two cavities 12 are respectively connected to the two sewage tanks 5. One end of the first rotating rod 10 extends into the cavity 12 and is fixedly connected to a driving wheel 13. The side wall of the hollow rotating shaft 9 is fixedly connected to a driven wheel 14, and the driving wheel 13 is connected to the driven wheel 14 through a synchronous belt. Furthermore, when the water level on one side of the dam body 1 is higher than the spillway 2, water will enter the spillway 2 and flow from the spillway 2 into the spillway 3 for discharge. When the water flows through the filter 4, the sludge in the water will be intercepted by the filter 4, thereby avoiding excessive sludge content in the water during discharge, causing greater pressure on the downstream river channel, and thus creating the risk of dam bursting.

[0020] The inner wall of the storage well 7 is provided with a plurality of drainage holes 36, the other ends of which penetrate the side wall of the dam body 1. Two artificial vertical shafts 37 are symmetrically provided at the upper end of the dam body 1, and the lower ends of the artificial vertical shafts 37 are connected to the sewage tank 5; A pressure-sensing control mechanism is installed on the hollow rotating shaft 9.

[0021] like Figure 6 As shown, the pressure-sensitive control mechanism includes two grooves 15 symmetrically opened on the inner wall of the hollow rotating shaft 9, the inner walls of the two grooves 15 are slidably connected with magnetic columns 16, the side wall of the reciprocating screw 8 is opened with a plurality of slots 17 cooperating with the magnetic columns 16, the inner wall of the groove 15 is fixedly connected with an electromagnet 18, and a first spring 19 is fixedly connected between the inner wall of the groove 15 and the magnetic column 16.

[0022] The pressure-sensitive control mechanism also includes a driving block 20 slidably connected to the top of the spillway 2. The upper end of the driving block 20 is arranged to penetrate the upper end of the dam body 1. A plurality of second springs 21 are fixedly connected to the top of the driving block 20 and the upper end of the dam body 1. A delay switch 22 is fixedly connected to the upper end of the dam body 1 through a bracket. The electromagnet 18, the delay switch 22 and the external power supply are electrically connected through wires.

[0023] It should be noted that after the delay switch 22 is turned on, during the period from its opening to its automatic disconnection, the sealing plate 6 slides back and forth exactly once.

[0024] Furthermore, when sludge accumulates on one side of the filter 4, the filter 4 will gradually be blocked, and then the water pressure on one side of the filter 4 will gradually increase, thereby pushing the drive block 20 to move upward. When the amount of sludge accumulated on one side of the filter 4 is sufficient, the drive block 20 will move upward to counter the delay switch 22, so that the delay switch 22 is turned on (the delay switch 22 will remain on for a period of time and then automatically disconnect). At this time, the circuit is connected, and the electromagnet 18 will be energized to generate magnetic repulsion, thereby pushing the magnetic column 16 into the slot 17. When the water flows through the impeller 11, the impact force it has will impact the impeller 11. The impeller 11 rotates, which in turn drives the first rotating rod 10 to rotate, drives the driving wheel 13 to rotate, and then drives the driven wheel 14 to rotate, and drives the hollow rotating shaft 9 to rotate. Due to the limitation of the magnetic column 16 and the card slot 17, the hollow rotating shaft 9 will synchronously drive the reciprocating screw 8 to rotate, drive the three sealing plates 6 to slide back and forth one round, and finally reset. During the sliding process of the sealing plate 6, the sludge accumulated on one side of the filter screen 4 will be pushed into the sewage trough 5 by the sealing plate 6, and then the sludge will fall into the storage well 7 for storage, and then the sludge accumulated in the spillway 2 can be cleared in real time to ensure the flood discharge capacity of the spillway 2.

[0025] It is worth mentioning that by utilizing the impact force of the water flow during flood discharge to clean up the sludge, part of the kinetic energy of the water flow can be converted. On the one hand, it can reduce the kinetic energy of the water flow and the impact force, and on the other hand, it can also save energy.

[0026] It should be noted that at a later stage, workers can enter the storage well 7 through the vertical shaft and transport the sludge out. The sludge can be used for farming, planting, etc., to avoid waste of resources.

[0027] A flow-slowing mechanism is installed on the spillway 3 , and the flow-slowing mechanism includes four flow-blocking plates 23 slidably connected to the inner wall of the spillway 3 , and one end of the flow-blocking plate 23 penetrates through the side wall of the spillway 3 .

[0028] The circulation mechanism also includes two second rotating rods 24 symmetrically connected to the side wall of the dam body 1, the side wall of the second rotating rod 24 is fixedly connected to the driving rod 25, the side wall of the spoiler 23 is fixedly connected to the connecting rod 26, the side wall of the connecting rod 26 is fixedly connected to the limiting rod 27, the side wall of the driving rod 25 is symmetrically provided with two limiting grooves 28, and the side wall of the limiting rod 27 is slidably connected to the inner wall of the limiting groove 28.

[0029] Furthermore, after water enters the spillway 3, it will be blocked in a stepped manner by multiple baffles 23, thereby gradually reducing the flow velocity and impact of the water flow, thereby preventing the water flow velocity and impact from being too large during flood discharge, thereby preventing damage to the downstream river channel.

[0030] A driving mechanism is installed on the dam body 1, and the driving mechanism includes two installation cavities 29 symmetrically opened in the dam body 1. One end of the second rotating rod 24 extends into the installation cavity 29 and is fixedly connected to the first bevel gear 30. The inner wall of the installation cavity 29 is rotatably connected to the third rotating rod 31. The side wall of the third rotating rod 31 is fixedly connected to an incomplete bevel gear 32 that cooperates with the first bevel gear 30. The side wall of the second rotating rod 24 is sleeved with a torsion spring 33, and the two ends of the torsion spring 33 are respectively fixedly connected to the side wall of the dam body 1 and the driving rod 25.

[0031] The driving mechanism further includes a second bevel gear 34 fixedly connected to the side wall of the first rotating rod 10 . One end of the third rotating rod 31 extends into the cavity 12 and is fixedly connected to a third bevel gear 35 . The second bevel gear 34 is meshedly connected to the third bevel gear 35 .

[0032] Furthermore, when the water flow hits the spoiler 23, strong splashing and ejection will be generated, and the surface of the water flow will roll and surge, forming a large-scale vortex motion at a position where the spoiler 23 and the inner wall of the spillway 3 form an angle of 90 degrees. When the rolling and surging water flow turns to the spoiler 23 of the lower layer in the form of an open flow, its water flow state will be very unstable, and the splashing and ejecting water hitting the spoiler 23 and the inner wall of the spillway 3 will have a greater impact on their structure. At this time, the rotation of the first rotating rod 10 will synchronously drive the second bevel gear 34 to rotate, and then drive the third bevel gear 35 to rotate, drive the third rotating rod 31 to rotate, and thus drive the incomplete bevel gear 32 to rotate, intermittently meshing with the first bevel gear 30, and cooperating with the torsion spring 33, can drive the second rotating rod 24 to rotate alternately forward and reverse. The driving rod 25 drives the spoiler 23 to slide back and forth through the connecting rod 26, so that the two spoilers 23 on the same side are alternately extended and retracted into the spillway 3. As a result, when the water flow hits the spoiler 23 and is about to form a vortex motion, the spoiler 23 of this layer retracts, so that the water flow lacks obstruction, and the water flow at this location continues to fall and impact the spoiler 23 of the lower layer. This reciprocating process does not allow the water flow to form a large-scale vortex motion at a position where the spoiler 23 forms an angle of 90 degrees with the inner wall of the spillway 3, thereby reducing the surging and impact of the water flow, making the flow state of the water flow more stable, and the spoiler 23 alternately blocks the flow, further enhancing the layer-by-layer deceleration effect on the water flow.

[0033] In the present invention, when the water level on one side of the dam body 1 is higher than the spillway 2, water will enter the spillway 2 and flow from the spillway 2 into the spillway 3 for flood discharge. When the water flows through the filter screen 4, the sludge in the water will be intercepted by the filter screen 4, thereby avoiding excessive sludge content in the water during flood discharge, causing greater pressure on the downstream river channel, and thus creating the risk of dam bursting.

[0034] When sludge accumulates on one side of the filter 4, the filter 4 will gradually be blocked, and then the water pressure on one side of the filter 4 will gradually increase, thereby pushing the drive block 20 to move upward. When the amount of sludge accumulated on one side of the filter 4 is large enough, the drive block 20 will move upward to contact the delay switch 22, so that the delay switch 22 is turned on (the delay switch 22 will automatically disconnect after being turned on for a period of time). At this time, the circuit is connected, and the electromagnet 18 will be energized to generate magnetic repulsion, thereby pushing the magnetic column 16 into the slot 17. When the water flows through the impeller 11, the impact force it has will impact the impeller 11, causing The impeller 11 rotates, thereby driving the first rotating rod 10 to rotate, driving the driving wheel 13 to rotate, and then driving the driven wheel 14 to rotate, driving the hollow rotating shaft 9 to rotate. Due to the limitation of the magnetic column 16 and the card slot 17, the hollow rotating shaft 9 will synchronously drive the reciprocating screw 8 to rotate, driving the three sealing plates 6 to slide back and forth one round, and finally reset. During the sliding process of the sealing plate 6, the sludge accumulated on one side of the filter screen 4 will be pushed into the sewage trough 5 by the sealing plate 6, and then the sludge will fall into the storage well 7 for storage, and then the sludge accumulated in the spillway 2 can be cleared in real time to ensure the flood discharge capacity of the spillway 2.

[0035] During the reciprocating movement of the sealing plate 6, part of the water in the spillway 2 will also enter the storage well 7 through the drain trough 5, and then the water will be discharged through multiple drain holes 36. Therefore, when the filter screen 4 is blocked, the water pressure on one side of the filter screen 4 can be relieved to a certain extent, thereby playing the role of diversion and flood discharge, and avoiding excessive pressure in the spillway 2 to cause damage to the dam body 1.

[0036] When the water flow hits the impeller 11 , the impeller 11 can also block the water flow to a certain extent, thereby reducing the flow rate of the water and the impact force of the water, thereby reducing the speed and impact force of the water falling into the spillway 3 .

[0037] Finally, after the water enters the spillway 3, it will be blocked by multiple baffles 23 in a stepped manner, thereby reducing the flow rate and impact of the water flow layer by layer, avoiding excessive flow rate and impact of the water flow during flood discharge, which will cause damage to the downstream river channel.

[0038] In addition, when the water flow hits the spoiler 23, strong splashing and catapulting will occur, and the surface of the water flow will roll and surge, forming a large-scale vortex motion at a position where the spoiler 23 and the inner wall of the spillway 3 form a 90-degree angle. When the rolling and surging water flow turns to the spoiler 23 at the lower layer in the form of an open flow, its water flow state will be very unstable, and the splashing and catapulting water hitting the spoiler 23 and the inner wall of the spillway 3 will have a greater impact on their structure. At this time, the rotation of the first rotating rod 10 will synchronously drive the second bevel gear 34 to rotate, and then drive the third bevel gear 35 to rotate, drive the third rotating rod 31 to rotate, and thus drive the incomplete bevel gear 32 to rotate, intermittently meshing with the first bevel gear 30, and cooperating with the torsion spring 33, can drive the second rotating rod 24 to rotate alternately forward and reverse. , and then drive the driving rod 25 to rotate alternately forward and reverse, and the driving rod 25 will drive the spoiler 23 to slide back and forth through the connecting rod 26, so that the two spoilers 23 on the same side are alternately extended and retracted into the spillway 3, and then due to the alternate extension and retraction of the spoiler 23, when the water flow hits the spoiler 23 and is about to form a vortex motion, the spoiler 23 of this layer retracts, so that the water flow lacks obstruction, and then the water flow at this place will continue to fall and impact the lower spoiler 23, and so on, so that the water flow does not have enough time to form a large-scale vortex motion at the position where the spoiler 23 and the inner wall of the spillway 3 form an angle of 90 degrees, thereby reducing the surging and impact of the water flow, making the water flow state more stable, and the spoiler 23 reciprocates and alternately blocks the flow, further enhancing the layer-by-layer deceleration effect on the water flow.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An open surface spillway, characterized in that: include: A dam body (1), wherein a spillway (2) is provided on a side wall of the dam body (1), the spillway (2) is arranged through the dam body (1), and a spillway (3) is provided on the side wall of the dam body (1); A cleaning mechanism, the cleaning mechanism comprising a filter screen (4) fixedly connected to the inner wall of a spillway (2), the inner wall of the spillway (2) symmetrically provided with two drainage grooves (5), the inner walls of the two drainage grooves (5) are both sealed and slidably connected with sealing plates (6), the number of the sealing plates (6) is three, a storage well (7) is provided at the bottom of the drainage groove (5), the inner walls of the two drainage grooves (5) are rotatably connected with a reciprocating screw (8), the side wall of the reciprocating screw (8) is threadedly connected to the sealing plate (6), the inner wall of the drainage groove (5) is fixedly connected with a sliding rod (38), the side wall of the sealing plate (6) is slidably connected to the sliding rod (38), and one of the drainage grooves (5) The inner wall is rotatably connected to a hollow rotating shaft (9), the hollow rotating shaft (9) is sleeved on the side wall of the reciprocating screw (8), the inner wall of the spillway (2) is rotatably connected to a first rotating rod (10), the side wall of the first rotating rod (10) is fixedly connected to a plurality of impellers (11), two cavities (12) are symmetrically provided in the dam body (1), the two cavities (12) are respectively connected to two sewage troughs (5), one end of the first rotating rod (10) extends into the cavity (12) and is fixedly connected to a driving wheel (13), the side wall of the hollow rotating shaft (9) is fixedly connected to a driven wheel (14), and the driving wheel (13) is connected to the driven wheel (14) through a synchronous belt; A pressure-sensing control mechanism is installed on the hollow rotating shaft (9).

2. The open surface spillway according to claim 1, characterized in that: in: The pressure-sensitive control mechanism comprises two grooves (15) symmetrically arranged on the inner wall of the hollow rotating shaft (9), the inner walls of the two grooves (15) are both slidably connected with magnetic columns (16), the side wall of the reciprocating screw (8) is provided with a plurality of slots (17) cooperating with the magnetic columns (16), the inner wall of the groove (15) is fixedly connected with an electromagnet (18), and a first spring (19) is fixedly connected between the inner wall of the groove (15) and the magnetic column (16).

3. The open surface spillway according to claim 2, characterized in that: in: The pressure-sensitive control mechanism further comprises a driving block (20) slidably connected to the top of the spillway (2); the upper end of the driving block (20) is arranged to penetrate the upper end of the dam body (1); the top of the driving block (20) and the upper end of the dam body (1) are fixedly connected to a plurality of second springs (21); the upper end of the dam body (1) is fixedly connected to a delay switch (22) via a bracket; and the electromagnet (18), the delay switch (22) and an external power source are electrically connected via a wire.

4. The open surface spillway according to claim 1, characterized in that: in: The spillway (3) is provided with a flow-slowing mechanism, the flow-slowing mechanism comprising four flow-blocking plates (23) slidably connected to the inner wall of the spillway (3), and one end of the flow-blocking plate (23) is arranged to penetrate the side wall of the spillway (3).

5. The open surface spillway according to claim 4, characterized in that: in: The flow slowing mechanism further comprises two second rotating rods (24) symmetrically connected to the side wall of the dam body (1); the side wall of the second rotating rod (24) is fixedly connected to a driving rod (25); the side wall of the baffle (23) is fixedly connected to a connecting rod (26); the side wall of the connecting rod (26) is fixedly connected to a limiting rod (27); the side wall of the driving rod (25) is symmetrically provided with two limiting grooves (28); the side wall of the limiting rod (27) is slidably connected to the inner wall of the limiting groove (28).

6. The open surface spillway according to claim 5, characterized in that: in: The dam body (1) is provided with a driving mechanism, the driving mechanism comprising two mounting cavities (29) symmetrically opened in the dam body (1); one end of the second rotating rod (24) extends into the mounting cavity (29) and is fixedly connected to a first bevel gear (30); a third rotating rod (31) is rotatably connected to the inner wall of the mounting cavity (29); a side wall of the third rotating rod (31) is fixedly connected to an incomplete bevel gear (32) matching the first bevel gear (30); a torsion spring (33) is sleeved on the side wall of the second rotating rod (24); two ends of the torsion spring (33) are respectively fixedly connected to the side wall of the dam body (1) and the driving rod (25).

7. The open surface spillway according to claim 6, characterized in that: in: The driving mechanism further comprises a second bevel gear (34) fixedly connected to the side wall of the first rotating rod (10); one end of the third rotating rod (31) extends into the cavity (12) and is fixedly connected to the third bevel gear (35); the second bevel gear (34) is meshingly connected to the third bevel gear (35).

8. The open surface spillway according to claim 1, characterized in that: in: The inner wall of the storage well (7) is provided with a plurality of drainage holes (36), and the other ends of the plurality of drainage holes (36) are arranged to penetrate the side wall of the dam body (1).

9. The open surface spillway according to claim 1, characterized in that: in: Two artificial vertical shafts (37) are symmetrically provided at the upper end of the dam body (1), and the lower ends of the artificial vertical shafts (37) are connected to the sewage trough (5).

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