Gate desilting device for water conservancy project

Abstract

The invention provides a gate desilting device for a water conservancy project, and relates to the technical field of gate desilting devices. The gate dredging device for the water conservancy project is applied to a gate body and comprises a deposition box, first round holes, a negative pressure pipe, an adjusting mechanism and a sewage discharging mechanism, the deposition box is arranged on the water inlet side of the gate body, the sewage discharging mechanism is arranged at the upper end of the deposition box and used for discharging sludge in the deposition box outwards, and the multiple first round holes are evenly formed in the side wall of the deposition box. The negative-pressure pipe is arranged at the upper end of the deposition box, the adjusting mechanism is connected between the negative-pressure pipe and the first round hole, the larger the flow speed of water in the negative-pressure pipe is, the larger the generated negative pressure is, and the larger the negative pressure in the negative-pressure pipe is, the adjusting mechanism drives the circulation sectional area in the first round hole to be gradually increased. Settled sludge is collected through the deposition box, and mechanical jamming caused by the fact that the sludge is accumulated at the gate track and the sealing structure is avoided; a sludge hardening structure in the deposition box is destroyed by water flowing, so that sludge is conveniently discharged, and enough space in the deposition box is ensured to collect sludge.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gate dredging device, in particular to a gate dredging device for water conservancy projects. BACKGROUND

[0002] Water conservancy projects are projects built to eliminate water damage and develop and utilize water resources. Gate dredging is an important maintenance work in water conservancy projects, mainly involving cleaning silt and sediments around and inside the gate to ensure the normal operation of the water gate and the smooth flow of water.

[0003] The existing gate position is prone to accumulate silt. After the silt is accumulated, it is easy to be hardened and is not conducive to cleaning. Since the hardened silt squeezes the gate track and the sealing structure, the mechanical jamming or even complete locking occurs, so that the gate loses the water level regulating ability. SUMMARY

[0004] To solve the above problems, the present application provides a gate dredging device for water conservancy projects.

[0005] The present application provides a gate dredging device for water conservancy projects, which is applied to a gate body and includes a deposition tank, first circular holes, a negative pressure pipe, an adjusting mechanism, and a sewage discharge mechanism. The deposition tank is arranged on the water inlet side of the gate body. The sewage discharge mechanism is arranged on the upper end of the deposition tank and is used to discharge the silt in the deposition tank. A plurality of first circular holes are evenly arranged in the side wall of the deposition tank. The negative pressure pipe is arranged on the upper end of the deposition tank. The adjusting mechanism is connected between the negative pressure pipe and the first circular hole. The greater the water flow velocity in the negative pressure pipe, the greater the negative pressure generated. The greater the negative pressure in the negative pressure pipe, the greater the flow area of the first circular hole driven by the adjusting mechanism.

[0006] Optionally, a plurality of negative pressure pipes are horizontally and fixedly arranged on the upper end of the deposition tank. Two groups of first circular holes corresponding to the two ends of the negative pressure pipe are evenly arranged in the side walls on the water inlet side and the water outlet side of the deposition tank, respectively. Two adjusting mechanisms are symmetrically arranged on the two sides of the lower end of the negative pressure pipe.

[0007] Optionally, the adjusting mechanism includes a sleeve, a piston plate, a water pipe, a first spring, a sliding plate, and a second circular hole. The upper end of the sleeve is fixedly connected to the bottom end of the corresponding negative pressure pipe. The piston plate is slidingly connected to the inner side wall of the sleeve. The upper end of the water pipe is fixedly arranged in the middle part of the bottom end of the piston plate. The outer side of the water pipe is slidingly connected to the middle part of the bottom end of the sleeve. The end of the water pipe away from the piston plate is fixedly arranged on the upper end of the side surface of the sliding plate. A plurality of second circular holes are evenly arranged in the sliding plate. The side surface of the sliding plate is slidingly connected to the inner side wall of the deposition tank. The second circular hole corresponds to the first circular hole. The first spring is wrapped around the outer side of the water pipe and is fixedly connected to the inner bottom surface of the sleeve and the bottom end of the piston plate.

[0008] Optionally, the upper end of the sliding plate is provided with a limiting plate, the limiting plate is fixed on the inner side wall of the sediment tank, the second circular hole is staggered with the first circular hole when the negative pressure in the negative pressure pipe is small, and the upper end of the sliding plate is in contact with the bottom end of the limiting plate when the second circular hole is completely overlapped with the first circular hole.

[0009] Optionally, a plurality of first micropores and second micropores are uniformly distributed in the side walls of the water conveying pipe.

[0010] Optionally, the water outlet end of the negative pressure pipe is fixedly connected with a connecting pipe, a spiral guide plate is fixedly arranged on the inner side wall of the vertical section of the connecting pipe, a center column is fixedly arranged in the middle of the spiral guide plate, a rotating rod is rotatably connected to the middle of the bottom end of the center column through a bearing, a propeller is fixedly arranged on the outer side of the upper end of the rotating rod, and a reciprocating mechanism is connected to the lower end of the rotating rod.

[0011] Optionally, the reciprocating mechanism further comprises an eccentric wheel, a circular plate, an extension rod, a second spring and a bottom plate, the bottom plate is slidably connected to the bottom surface of the sediment tank, a plurality of loose rods are fixedly arranged on the end surface of the bottom plate, the extension rod is fixedly arranged on the side surface of the bottom plate, the extension rod is slidably connected to the inner side wall of the sediment tank, the circular plate is fixedly arranged on the end of the extension rod away from the bottom plate, the second spring is wrapped around the outer side of the extension rod and is fixedly connected to the outer side wall of the sediment tank and the side surface of the circular plate at both ends, and the eccentric wheel is fixedly installed on the lower end of the rotating rod and is in contact with the side surface of the circular plate.

[0012] Optionally, the sludge discharge mechanism comprises a sludge pump, a sludge inlet pipe and a sludge outlet pipe, a support plate is fixedly installed on the bottom end of the sludge pump, the support plate is fixedly arranged on the inner side wall of the water inlet side of the gate body, the sludge inlet pipe is fixedly connected to the input end of the sludge pump, the sludge inlet pipe extends vertically to the top end of the bottom surface of the sediment tank, the sludge outlet pipe is fixedly connected to the output end of the sludge pump, and the output end of the sludge outlet pipe extends to an external collection tank.

[0013] Optionally, the sediment tank is fixedly installed on the inner side wall of the water inlet side of the gate body through bolts.

[0014] The gate dredging device for water conservancy projects has the following advantages: 1. When the gate body is closed, the settled sludge is collected in the sediment tank, so that the sludge is prevented from accumulating at the gate track and the sealing structure to cause mechanical jamming; 2. When the gate body is closed, the water flow in the negative pressure pipe is slow, and almost no negative pressure is generated in the negative pressure pipe, so that the flow area in the first circular hole is very small, the micropores form a precision filter layer, and the overflow of sludge particles in the sediment tank is effectively blocked; 3. When the gate body is opened, if the water flow rate flowing through the negative pressure pipe is relatively small, the negative pressure generated in the negative pressure pipe is relatively small, the flow passage area in the first circular hole is driven by the adjusting mechanism to increase slightly, at this time, the water flow through the first circular hole forms a turbulent flow to generate shear force, the shear force cuts the cohesive force of the sludge, destroys the hardened structure of the sludge, and improves the suspension efficiency, so as to facilitate the sludge discharge; 4. If the water flow rate flowing through the negative pressure pipe is relatively fast, the negative pressure generated in the negative pressure pipe is relatively large, the flow passage area in the first circular hole is driven by the adjusting mechanism to increase greatly, at this time, the water flow high-speed impacts the hardened sludge in the sediment tank through the first circular hole, effectively destroys the cohesive force between the sludge particles, and disperses the particles by the water flow impact, so as to facilitate the sludge in the sediment tank to be discharged outward through the sewage discharge mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole three-dimensional structure schematic view of the gate dredging device for water conservancy projects in the embodiment of the application; Figure 2 It is a internal structure schematic view of the sediment tank in the gate dredging device for water conservancy projects in the embodiment of the application; Figure 3 It is a external structure schematic view of the sediment tank in the gate dredging device for water conservancy projects in the embodiment of the application; Figure 4 It is a plane structure schematic view of the sediment tank in the gate dredging device for water conservancy projects in the embodiment of the application; Figure 5 It is a sectional view of A-A in Figure 4 ; Figure 6 It is a structure schematic view of the water delivery pipe in the gate dredging device for water conservancy projects in the embodiment of the application; Figure 7 It is a structure schematic view of the rotating rod in the gate dredging device for water conservancy projects in the embodiment of the application; Figure 8 It is an enlarged view of the structure at A in Figure 5 ;

[0016] Explanation of reference signs: 100, gate body; 200, sediment tank; 201, first circular hole; 300, negative pressure pipe; 400, sleeve; 401, piston plate; 402, water delivery pipe; 403, first spring; 404, first micro hole; 405, second micro hole; 406, sliding plate; 407, second circular hole; 408, limiting plate; 500, connecting pipe; 501, spiral guide plate; 502, center column; 503, rotating rod; 504, propeller; 505, eccentric wheel; 506, circular plate; 507, telescopic rod; 508, second spring; 509, bottom plate; 510, loosening rod; 600, sludge pump; 601, sludge inlet pipe; 602, sludge outlet pipe. DETAILED DESCRIPTION

[0017] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0018] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection, it can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0019] In the description of the present application, the description of the terms "embodiment", "one embodiment", "some embodiments", "exemplarily" and "one embodiment" means that the specific features, structures, materials or characteristics described in connection with the embodiment or embodiment are included in at least one embodiment or embodiment of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or embodiments in a suitable manner.

[0020] The terms "first", "second" and the like are only used for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features.

[0021] As Figures 1-8 As shown in the figure, the embodiment of the present application provides a gate dredging device for water conservancy projects, which is applied to a gate body 100, comprising a sediment tank 200, a first circular hole 201, a negative pressure pipe 300, an adjusting mechanism and a sewage discharge mechanism, the sediment tank 200 is arranged on the water inlet side of the gate body 100, the sewage discharge mechanism is arranged on the upper end of the sediment tank 200, and is used for discharging the sludge in the sediment tank 200 outward, a plurality of first circular holes 201 are uniformly arranged in the side wall of the sediment tank 200, the negative pressure pipe 300 is arranged on the upper end of the sediment tank 200, the adjusting mechanism is connected between the negative pressure pipe 300 and the first circular hole 201, the greater the water flow velocity in the negative pressure pipe 300, the greater the negative pressure generated, the greater the negative pressure in the negative pressure pipe 300, and the adjusting mechanism drives the gradually increasing flow area of the first circular hole 201.

[0022] In this embodiment, when the gate body 100 is in the closed state, the sediment tank 200 is arranged on the water inlet side of the gate body 100 to collect the sludge deposited on the water inlet side of the gate body 100, so as to avoid the mechanical jam caused by the accumulation of sludge at the gate rail and the sealing structure. At this time, the water flow on the water inlet side of the gate body 100 is mostly in a static state, so the water flow in the negative pressure pipe 300 is slow or in a static state, and almost no negative pressure is generated in the negative pressure pipe 300, so that the flow area of the first circular hole 201 is very small, the micropore forms a precision filter layer, effectively blocks the overflow of sludge particles in the sediment tank 200, and as the sludge in the sediment tank 200 increases, the self-weight of the upper sludge is converted into a sustained load applied to the lower layer, causing the structure of the lower sludge to become hardened. When the gate body 100 is in the open state, if the water level of the accumulated water body is relatively low, the water flow through the gate body 100 is relatively low, the water flow through the negative pressure pipe 300 is relatively small, and the negative pressure generated in the negative pressure pipe 300 is relatively small. The flow area of the first circular hole 201 is slightly increased by the adjusting mechanism, at this time, the water flow through the first circular hole 201 forms a turbulent flow to generate shear force, which cuts off the cohesion of the sludge and destroys the hardened structure of the sludge, thereby improving the suspension efficiency and facilitating sludge discharge. If the water level of the accumulated water body is relatively high, the water flow through the gate body 100 is relatively fast, the water flow through the negative pressure pipe 300 is relatively fast, and the negative pressure generated in the negative pressure pipe 300 is relatively large. The flow area of the first circular hole 201 is greatly increased by the adjusting mechanism, at this time, the water flow through the first circular hole 201 at high speed impacts the hardened sludge in the sediment tank 200, effectively destroys the cohesion between the sludge particles, and softens the hard block and disperses the particles by water flow impact, so as to facilitate the sludge in the sediment tank 200 to be discharged outward by the sewage discharge mechanism; When the gate body 100 is closed, the deposited sludge is collected by the deposition tank 200, avoiding the mechanical jam caused by the sludge accumulation at the gate rail and the sealing structure; when the gate body 100 is closed, the water flow in the negative pressure pipe 300 is slow, and almost no negative pressure is generated in the negative pressure pipe 300, so that the flow area of the first circular hole 201 is very small, the micropore forms a precise filter layer, effectively blocking the overflow of sludge particles in the deposition tank 200; when the gate body 100 is opened, if the water flow in the negative pressure pipe 300 is relatively slow, the negative pressure generated in the negative pressure pipe 300 is relatively small, and the flow area of the first circular hole 201 is slightly increased by the adjusting mechanism, at this time, the water flow in the first circular hole 201 forms a turbulent flow to generate shear force, which cuts off the cohesion of the sludge and destroys the sludge hardening structure, thereby improving the suspension efficiency and facilitating the sludge discharge; if the water flow in the negative pressure pipe 300 is relatively fast, the negative pressure generated in the negative pressure pipe 300 is relatively large, and the flow area of the first circular hole 201 is greatly increased by the adjusting mechanism, at this time, the water flow in the first circular hole 201 impacts the hardening sludge in the deposition tank 200 at high speed, effectively destroying the cohesion between the sludge particles, and the water flow impacts and softens the hard block and disperses the particles, so as to facilitate the sludge in the deposition tank 200 to be discharged outward by the sewage discharge mechanism.

[0023] As shown in Figure 3 With Figure 5 As shown, optionally, a plurality of negative pressure pipes 300 are horizontally and fixedly arranged on the upper end of the deposition tank 200, two groups of first circular holes 201 corresponding to the two ends of the negative pressure pipe 300 are evenly arranged in the water inlet side and the water outlet side of the deposition tank 200, and two adjusting mechanisms are symmetrically arranged on the two sides of the lower end of the negative pressure pipe 300.

[0024] In this embodiment, a throat section with the smallest pipe cross-sectional area is symmetrically arranged on both sides of the negative pressure pipe 300, and a contraction section with gradually decreasing pipe cross-sectional area is symmetrically arranged on both sides of the throat section, when the water flow enters the contraction section of the negative pressure pipe 300, the pipe cross-sectional area gradually decreases and the flow rate gradually increases, when the water flow enters the throat section of the negative pressure pipe 300, the flow rate reaches the peak value and the pressure drops to the minimum value, thereby generating a strong negative pressure adsorption effect, and the adjusting mechanism drives the flow area of the corresponding group of first circular holes 201 to increase, when the water flow in the negative pressure pipe 300 gradually increases, the strong negative pressure adsorption effect gradually increases, and the flow area of the two groups of first circular holes 201 gradually increases.

[0025] As shown in Figure 3 , Figure 5 , Figure 6 With Figure 8As shown, optionally, the adjusting mechanism comprises a sleeve 400, a piston plate 401, a water pipe 402, a first spring 403, a sliding plate 406 and a plurality of second circular holes 407. The upper end of the sleeve 400 is fixedly connected to the bottom end of the throat section of the corresponding negative pressure pipe 300. The piston plate 401 is slidingly connected to the inner side wall of the sleeve 400. The upper end of the water pipe 402 is fixedly arranged at the middle of the bottom end of the piston plate 401. The outer side of the water pipe 402 is slidingly connected to the middle of the bottom end of the sleeve 400. The end of the water pipe 402 away from the piston plate 401 is fixedly arranged on the upper end of the side of the sliding plate 406. The plurality of second circular holes 407 are uniformly arranged in the interior of the sliding plate 406. The side of the sliding plate 406 is slidingly connected to the inner side wall of the sediment tank 200. The second circular holes 407 correspond to the first circular holes 201 one by one. The first spring 403 is wrapped around the outer side of the water pipe 402 and is fixedly connected to the inner bottom surface of the sleeve 400 and the bottom end of the piston plate 401.

[0026] In this embodiment, when the water flow enters the contraction section of the negative pressure pipe 300, the cross-sectional area of the pipeline gradually decreases, and the flow rate gradually increases. When the water flow enters the throat section of the negative pressure pipe 300, the flow rate reaches a peak value, and the pressure drops to a minimum value, thereby generating a strong negative pressure adsorption effect. The strong negative pressure adsorption effect reduces the space at the upper end of the piston plate 401, and the piston plate 401 moves upward in the sleeve 400. The sliding plate 406 is driven by the water pipe 402 to move upward on the inner side wall of the sediment tank 200, thereby driving the plurality of second circular holes 407 to move upward. At this time, the second circular holes 407 partially overlap the first circular holes 201. The external water flow enters the interior of the sediment tank 200 through the overlapping part. When the flow rate of the water flow in the negative pressure pipe 300 gradually increases, the strong negative pressure adsorption effect gradually increases, thereby gradually increasing the cross-sectional area of the overlapping part. At this time, the first spring 403 is in a stretched state. When the flow rate of the water flow in the negative pressure pipe 300 is gentle, the piston plate 401 moves upward and resets under the driving of the first spring 403 recovering deformation. The sliding plate 406 moves downward and resets, so that the cross-sectional area of the overlapping part gradually decreases.

[0027] As shown, Figure 8 Optionally, a limiting plate 408 is arranged at the upper end of the sliding plate 406. The limiting plate 408 is fixedly arranged on the inner side wall of the sediment tank 200. When the second circular holes 407 are misaligned with the first circular holes 201 due to the small negative pressure in the negative pressure pipe 300, the upper end of the sliding plate 406 is in contact with the bottom end of the limiting plate 408 when the second circular holes 407 completely overlap the first circular holes 201.

[0028] In this embodiment, when the water flow rate in the negative pressure pipe 300 is gentle, the strong negative pressure adsorption effect gradually decreases, so that the cross-sectional area of the overlapping part gradually decreases, and at this time the flow passage cross-sectional area in the first circular hole 201 gradually decreases. Conversely, when the water flow rate in the negative pressure pipe 300 increases, the strong negative pressure adsorption effect increases, and at this time the cross-sectional area of the overlapping part increases. When the upper end of the sliding plate 406 is in contact with the bottom end of the limiting plate 408, at this time the first circular hole 201 and the second circular hole 407 are completely overlapped, that is, the cross-sectional area of the overlapping part is maximum, and the design of the limiting plate 408 ensures that the sliding plate 406 will not continue to move upward when the water flow rate in the negative pressure pipe 300 continues to increase, that is, the cross-sectional area of the overlapping part will not decrease after the first circular hole 201 and the second circular hole 407 are completely aligned, which will not affect the water flow impact.

[0029] As shown in Figure 6 With Figure 8 As shown, optionally, a plurality of first micropores 404 and second micropores 405 are evenly distributed in the side walls of the water delivery pipe 402 at both ends.

[0030] In this embodiment, when the piston plate 401 moves upward inside the sleeve 400, the space at the lower end of the piston plate 401 increases, and at this time the space at the lower end of the piston plate 401 needs to be absorbed to maintain the space to be large. The water flow outside enters the water delivery pipe 402 through the second micropore 405, and then enters the space at the lower end of the piston plate 401 through the first micropore 404 to fill it. Conversely, when the piston plate 401 moves downward, the space at the lower end of the piston plate 401 decreases, thereby extruding the water in the space at the lower end to enter the water delivery pipe 402 through the first micropore 404, and then being discharged outward through the second micropore 405.

[0031] As shown in Figure 5 As shown, optionally, a plurality of first micropores 404 and second micropores 405 are evenly distributed in the side walls of the water delivery pipe 402 at both ends.

[0032] In this embodiment, after the water flow flows out from the water outlet end of the negative pressure pipe 300 and enters the connecting pipe 500, the spiral flow of the water flow is forced to form through the spiral flow guide plate 501 in the connecting pipe 500. When the spiral flow is discharged outward through the bottom end of the connecting pipe 500, the spiral propeller 504 is driven to rotate, thereby driving the rotating rod 503 to rotate relative to the center column 502. The rotating rod 503 rotates to drive the loosening rod 510 to move horizontally and reciprocally, thereby loosening the sludge in the sediment tank 200.

[0033] like Figure 3 , Figure 5 and Figure 7 As shown, optionally, the reciprocating mechanism also includes an eccentric wheel 505, a circular plate 506, a telescopic rod 507, a second spring 508, and a base plate 509. The bottom end of the base plate 509 is slidably connected to the inner bottom surface of the sedimentation tank 200. Multiple loose rods 510 are uniformly and vertically fixed on the end face of the base plate 509. The end of the telescopic rod 507 is fixed on the side of the base plate 509. The outer side of the telescopic rod 507 is slidably connected to the inside of the side wall of the sedimentation tank 200. The circular plate 506 is fixed on the end of the telescopic rod 507 away from the base plate 509. The second spring 508 covers the outer side of the telescopic rod 507, and its two ends are fixedly connected to the outer wall of the sedimentation tank 200 and the side of the circular plate 506, respectively. The eccentric wheel 505 is fixedly installed on the lower end of the rotating rod 503 and is in contact with the side of the circular plate 506.

[0034] In this embodiment, the rotation of the rotating rod 503 drives the eccentric wheel 505 to rotate. The eccentric wheel 505 contacts the circular plate 506, and under the elastic force of the second spring 508, it drives the telescopic rod 507 to move horizontally in a reciprocating linear motion. Then, the bottom plate 509 drives multiple loosening rods 510 to move horizontally in a reciprocating linear motion. When water flows through the negative pressure pipe 300, the shear force and impact of the water flow disperse the hardened sludge in the sedimentation tank 200. Combined with the reciprocating vibration of the loosening rods 510, the suspension effect of the sludge particles is improved, so that the sludge can be discharged through the sewage discharge mechanism.

[0035] like Figure 1 As shown, optionally, the sewage discharge mechanism includes a sludge pump 600, a sludge inlet pipe 601, and a sludge outlet pipe 602. A support plate is fixedly installed at the bottom of the sludge pump 600. The support plate is fixedly installed on the upper end of the inner wall of the gate body 100 on the water inlet side. The sludge inlet pipe 601 is fixedly connected to the input end of the sludge pump 600. The input end of the sludge inlet pipe 601 extends vertically to the upper end of the inner bottom surface of the sedimentation tank 200. The sludge outlet pipe 602 is fixedly connected to the output end of the sludge pump 600. The output end of the sludge outlet pipe 602 extends to the external collection tank.

[0036] In this embodiment, after the hardened sludge in the sedimentation tank 200 is loosened, the sludge is sucked into the sludge inlet pipe 601 by starting the sludge pump 600, and then discharged into the external collection tank through the sludge outlet pipe 602. The sludge in the sedimentation tank 200 is discharged out in a timely manner. The water flow will carry away some of the sludge, and the remaining sludge will be discharged by the sludge pump 600, so that the sedimentation tank 200 always maintains a certain space for storing the settled sludge.

[0037] like Figure 1 As shown, optionally, the sedimentation tank 200 is bolted to the inner wall of the gate body 100 on the water inlet side.

[0038] In this embodiment, the sedimentation tank 200 is fixedly installed on the inner wall of the gate body 100 on the water inlet side by bolts to fix the position of the sedimentation tank 200 and prevent displacement due to water flow impact.

[0039] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A sluice gate dredging device for water conservancy projects, applied to the gate body (100), characterized in that, The system includes a sedimentation tank (200), a first circular hole (201), a negative pressure pipe (300), an adjustment mechanism, and a sewage discharge mechanism. The sedimentation tank (200) is located on the water inlet side of the gate body (100). The sewage discharge mechanism is located at the upper end of the sedimentation tank (200) and is used to discharge the sludge in the sedimentation tank (200) outward. Multiple first circular holes (201) are evenly arranged in the side wall of the sedimentation tank (200). The negative pressure pipe (300) is located at the upper end of the sedimentation tank (200). The adjustment mechanism is connected between the negative pressure pipe (300) and the first circular hole (201). The greater the water flow velocity in the negative pressure pipe (300), the greater the negative pressure generated. The greater the negative pressure in the negative pressure pipe (300), the greater the flow cross-sectional area in the first circular hole (201) is driven to gradually increase by the adjustment mechanism.

2. The gate dredging device for water conservancy projects as described in claim 1, characterized in that, The upper end of the sedimentation tank (200) is horizontally fixed with a plurality of uniformly distributed negative pressure pipes (300). The two sets of first circular holes (201) corresponding to the two ends of the negative pressure pipes (300) are respectively uniformly opened in the side wall of the sedimentation tank (200) on the water inlet side and the water outlet side. The two adjustment mechanisms are symmetrically arranged on both sides of the lower end of the negative pressure pipes (300).

3. The gate dredging device for water conservancy projects as described in claim 1, characterized in that, The adjusting mechanism includes a sleeve (400), a piston plate (401), a water pipe (402), a first spring (403), a sliding plate (406), and a second circular hole (407). The upper end of the sleeve (400) is fixedly connected to the bottom end of the throat section of the corresponding negative pressure pipe (300). The piston plate (401) is slidably connected to the inner wall of the sleeve (400). The upper end of the water pipe (402) is fixed to the middle of the bottom end of the piston plate (401). The outer side of the water pipe (402) is slidably connected to the middle of the bottom end of the sleeve (400). The water supply pipe (402) is fixed at one end away from the piston plate (401) on the upper side of the slide plate (406). Multiple second round holes (407) are evenly opened inside the slide plate (406). The side of the slide plate (406) is slidably connected to the inner wall of the sedimentation tank (200). The second round holes (407) correspond one-to-one with the first round holes (201). The first spring (403) covers the outside of the water supply pipe (402) and its two ends are fixedly connected to the inner bottom surface of the sleeve (400) and the bottom end of the piston plate (401), respectively.

4. The gate dredging device for water conservancy projects as described in claim 3, characterized in that, A limiting plate (408) is provided at the upper end of the slide plate (406). The limiting plate (408) is fixed on the inner wall of the sedimentation tank (200). When the negative pressure in the negative pressure pipe (300) is small, the second round hole (407) is offset from the first round hole (201). When the second round hole (407) and the first round hole (201) are completely overlapped, the upper end of the slide plate (406) contacts the bottom end of the limiting plate (408).

5. The gate dredging device for water conservancy projects as described in claim 3, characterized in that, The water pipe (402) has multiple uniformly distributed first micropores (404) and second micropores (405) on the inner side walls at both ends.

6. The gate dredging device for water conservancy projects as described in claim 1, characterized in that, The negative pressure pipe (300) is fixedly connected to a connecting pipe (500) at its outlet end. A spiral guide plate (501) is fixedly installed on the inner wall of the vertical section of the connecting pipe (500). A central column (502) is fixedly installed in the middle of the spiral guide plate (501). A rotating rod (503) is rotatably connected to the inner side of the bottom middle of the central column (502) through a bearing. A propeller (504) is fixedly installed on the outer side of the upper end of the rotating rod (503). A reciprocating mechanism is connected to the lower end of the rotating rod (503). The reciprocating mechanism includes a loosening rod (510) installed inside the sedimentation tank (200). The rotating rod (503) rotates and drives the loosening rod (510) to reciprocate horizontally.

7. The gate dredging device for water conservancy projects as described in claim 6, characterized in that, The reciprocating mechanism also includes an eccentric wheel (505), a circular plate (506), a telescopic rod (507), a second spring (508), and a base plate (509). The bottom end of the base plate (509) is slidably connected to the bottom surface of the sedimentation tank (200). A plurality of loosening rods (510) are uniformly and vertically fixed on the end face of the base plate (509). The end of the telescopic rod (507) is fixed on the side of the base plate (509). The outer side of the telescopic rod (507) is slidably connected to the inside of the side wall of the sedimentation tank (200). The circular plate (506) is fixed on the end of the telescopic rod (507) away from the base plate (509). The second spring (508) covers the outer side of the telescopic rod (507), and its two ends are fixedly connected to the outer wall of the sedimentation tank (200) and the side of the circular plate (506), respectively. The eccentric wheel (505) is fixedly installed on the lower end of the rotating rod (503) and is in contact with the side of the circular plate (506).

8. The gate dredging device for water conservancy projects as described in claim 1, characterized in that, The sewage discharge mechanism includes a sludge pump (600), a sludge inlet pipe (601), and a sludge outlet pipe (602). A support plate is fixedly installed at the bottom of the sludge pump (600). The support plate is fixedly installed on the upper end of the inner wall of the gate body (100) on the water inlet side. The sludge inlet pipe (601) is fixedly connected to the input end of the sludge pump (600). The input end of the sludge inlet pipe (601) extends vertically to the upper end of the bottom surface of the sedimentation tank (200). The sludge outlet pipe (602) is fixedly connected to the output end of the sludge pump (600). The output end of the sludge outlet pipe (602) extends to the external collection tank.

9. The gate dredging device for water conservancy projects as described in claim 1, characterized in that, The sedimentation tank (200) is fastened to the inner wall of the gate body (100) on the water inlet side by bolts on both sides.

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