Backwashing device for desilting system of river sluice dam

Abstract

The utility model relates to the field of water conservancy facilities, in particular to a backwashing device of a sluice dam desilting system. Comprising a desilting system and a backwashing device, the desilting system comprises a sand flushing hole and a desilting channel, a switching valve is installed on the desilting channel, and a backwashing pump is connected to the desilting channel in parallel; the backwashing device comprises a mounting frame, a pressing plate is mounted at the bottom of the mounting frame, a plurality of through holes are formed in the pressing plate, the through holes correspond to the sand flushing holes in position, a mounting shaft is fixedly mounted on the pressing plate above the through holes, a rotating plate is mounted on the mounting shaft, the mounting shaft penetrates through the rotating plate, and the rotating plate can rotate relative to the pressing plate. According to the utility model, the sand flushing hole is effectively prevented from being blocked, and the sand flushing hole can be timely cleaned before being blocked or at the initial stage by arranging the backwashing device, so that the sand flushing hole is effectively prevented from being blocked due to sludge and the like, and the normal operation of the sand discharging system is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of water conservancy facilities, concretely relates to a sand discharge system backflushing device of river barrage. BACKGROUND

[0002] Humans build barrage projects for intercepting surface runoff and fully utilizing water resources, and most of them have sediment accumulation problems, such as causing the upstream riverbed to rise and the diversion channel to accumulate; if proper sediment discharge measures are not taken, it will have adverse effects on society and the environment. The traditional sand discharge system usually takes sediment discharge measures near the water intake of the barrage to prevent a large amount of sediment from entering the river barrage diversion system. The riverbed sediment discharge corridor of the traditional sand discharge system is a pressure flow sand discharge, which has the shortcomings that the closer the sand discharge hole of the riverbed sediment discharge corridor is to the shore, the stronger the sand discharge capacity is, and the farther the sand discharge hole of the riverbed sediment discharge corridor is from the shore, the weaker the sand discharge capacity is, and the traditional pressure flow sand discharge has poor sand carrying capacity due to stable flow state. The traditional sand discharge system ignores that sediment is a building material and a natural resource. Therefore, the traditional sand discharge system has problems such as small sand discharge range, insufficient sand carrying capacity of the corridor, and no collection of discharged sediment.

[0003] In the prior art, CN212316853U is a low-head river barrage sand discharge system, the sand discharge corridor includes a riverbed sand discharge corridor and a shore sand discharge corridor, the riverbed sand discharge corridor is arranged at the upstream of the river barrage, a cover plate is arranged on the riverbed sand discharge corridor, a plurality of sand discharge holes are arranged on the cover plate, and a control gate is arranged on the shore sand discharge corridor. The system realizes pressureless flow sand discharge of the sand discharge corridor, expands the sand discharge range of the sand discharge system, and improves the sand discharge effect.

[0004] The above technical solution solves the problems existing in the prior art to some extent, but the sand discharge hole may be blocked by silt after a long time of work. SUMMARY

[0005] To solve the problem of blockage of the sand discharge hole in the prior art, the utility model provides a river barrage sand discharge system backflushing device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A river barrage sand discharge system backflushing device, comprising a sand discharge system and a backflushing device,

[0008] The sand discharge system comprises a sand discharge hole and a sand discharge channel, a switch valve is installed on the sand discharge channel, and a backflushing pump is connected in parallel to the sand discharge channel;

[0009] The backflushing device comprises a mounting frame, a pressing plate is installed at the bottom of the mounting frame, a plurality of through holes are formed in the pressing plate, and the through holes correspond to the positions of the sand discharge holes;

[0010] The installation shaft is fixedly installed on the pressing plate, and a rotating plate is installed on the installation shaft.

[0011] The rotating plate is fixedly connected with one end of the tension spring, and the other end of the tension spring is fixedly connected with the pressing plate.

[0012] The guide rail is installed on the mounting frame, the sliding block is slidably installed on the guide rail, the motor is installed on the mounting frame, the lead screw is installed at the output end of the motor, and the lead screw is engaged with the sliding block.

[0013] The sliding block is fixedly installed with a pushing rod at the bottom.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] Effectively prevent the sand hole from being blocked: by setting the backwashing device, timely cleaning can be performed before or in the initial stage of the sand hole being blocked, thereby effectively preventing the sand hole from being blocked due to silt and the like, and ensuring the normal operation of the sand discharge system.

[0016] Improve the sand discharge efficiency: by using the backwashing method, compared with the simultaneous discharge of all sand holes, this method can concentrate on cleaning a single sand hole, thereby improving the sand discharge efficiency and ensuring that each sand hole can be fully cleaned.

[0017] Automatic operation: by cooperation of the motor, the lead screw and the sliding block and the like, the automatic backwashing process is realized, the need for manual intervention is reduced, the labor intensity is reduced, and the operation safety is improved.

[0018] Save resources: since backwashing is performed on a single sand hole at a time, compared with multi-hole backwashing at the same time, this method can save water and reduce unnecessary resource waste.

[0019] Easy to maintain and manage: the entire backwashing system is designed reasonably, easy to install and disassemble, easy to check and maintain regularly, and helps to prolong the service life of the system.

[0020] In summary, the patent provides an effective device for preventing the sand hole from being blocked, improves the performance of the sand discharge system, and improves the convenience and economy of management. BRIEF DESCRIPTION OF DRAWINGS

[0021] Other features, objects and advantages of the utility model will become more apparent through reading the detailed description of the non-limiting embodiments with reference to the following drawings.

[0022] Figure 1 is a schematic diagram of the sand discharge system structure of the utility model.

[0023] Figure 2The utility model discloses structure schematic diagram Figure One .

[0024] Figure 3 The utility model discloses structure schematic diagram Figure 2 .

[0025] Figure 4 The utility model discloses structure schematic diagram Figure Two .

[0026] Figure 5 The utility model discloses structure schematic diagram Figure Three . Specific implementation

[0027] The utility model will be further explained in detail through examples, and the examples are only used to illustrate the utility model and do not limit the range of the utility model.

[0028] A kind of river barrage desilting system backflushing device, including desilting system and backflushing device,

[0029] The desilting system includes flushing hole 21 and desilting passage 22, and the desilting passage 22 is provided with on-off valve 24, and the desilting passage 22 is connected with backflushing pump 23 in parallel;Gate sand is discharged through the flushing hole 21, and the desilting passage 22 functions to desilting, and the backflushing pump 23 functions to start the desilting system;The on-off valve 24 controls the outlet of the desilting passage 22.

[0030] The backflushing device includes mounting bracket 9, and the mounting bracket 9 is fixedly connected with pressing plate 8, and the pressing plate 8 is provided with a plurality of through holes 12, and the through holes 12 are correspondingly arranged with flushing hole 21, and the through holes 12 are covered by rotating plate 10 in normal state;The pressing plate 8 is buckled on the flushing hole 21, so that the flushing hole 21 and the through hole 12 correspond to each other;The pressing plate 8 is fixedly connected with mounting shaft 2, and the mounting shaft 2 is connected with rotating plate 10, and the mounting shaft 2 penetrates through the rotating plate 10, and the rotating plate 10 is rotatable relative to the pressing plate 8, and the rotating plate 10 covers the flushing hole 21 in normal state to prevent clogging, and is automatically moved away during dredging;One end of the rotating plate 10 is fixedly connected with tension spring 6, and the other end of the tension spring 6 is fixedly connected with the pressing plate 8, and the tension spring 6 resets the rotating plate 10 after each corresponding flushing hole 21 is dredged;The pressing plate 8 is provided with limiting block 7, and the limiting block 7 prevents the rotating plate 10 from being deviated;The limiting block 7 is located on one side of the tension spring 6, and the mounting bracket 9 is provided with guide rail 4, and the guide rail 4 is slidably connected with sliding block 1, and the guide rail 4 ensures that the sliding block 1 moves stably;The mounting bracket 9 is provided with motor 5, and the motor 5 is connected with lead screw 3, and the lead screw 3 is engaged with the sliding block 1, and the sliding block 1 is fixedly connected with push rod 11, and the push rod 11 is located on one side of the rotating plate 10. The push rod 11 is in cylindrical structure;The sliding block 1 drives the push rod 11 to push and extrude one end of the rotating plate 10, so that the rotating plate 10 is deflected, and the through hole 12 is opened after the rotating plate 10 is deflected.

[0031] When cleaning is needed, the backflush pump 23 works to drive the water flow through the sand discharge channel 22 to the sand flushing hole 21, and then the water flow is discharged upward from the sand flushing hole 21, under the action of the pressing plate 8 cooperating with the rotating plate 10, the through hole 12 covered by the rotating plate 10 cannot discharge the water flow, at this time, the motor 5 drives the screw rod 3 to rotate, and then drives the sliding block 1 to move, the sliding block 1 drives the pushing rod 11 to push and extrude one end of the rotating plate 10, and then the rotating plate 10 is deflected, the rotating plate 10 is deflected to open the through hole 12, and then the through hole 12 releases the water flow of the sand flushing hole 21 upward, so that the water flow is released through only one sand flushing hole 21 at this time, and the technical scheme of simultaneously discharging upward relative to the sand flushing hole 21 can dredge each sand flushing hole 21, after backflushing of one sand flushing hole 21 is completed, the motor 5 drives the screw rod 3 to move the sliding block 1 to the position of the next pressing plate 8 to open the next pressing plate 8, and the sand flushing hole 21 at this position is backflushed, and the above process is cycled to realize backflushing of multiple sand flushing holes 21, after backflushing is completed, the backflush pump 23 is closed, the lifting mechanism drives the mounting frame 9 to lift, so that the pressing plate 8 is away from the sand flushing hole 21.

[0032] The construction content of the Guangzhou certain river barrage reinforcement reconstruction project is to reinforce and reconstruct the Da'ao river barrage, the working gate of the river barrage in this construction is a pile number BZ0+000-BZ0+192, and the length in the water flow direction is 192m. After the device is adopted in construction, human intervention factors are reduced, sand is conveniently removed during later gate operation, and good economic and social benefits are brought.

[0033] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and these changes and modifications all fall within the protection scope of the present application.

Claims

1. A backwash device for a sediment sluicing system of a barrage, characterized in that, The sand discharging system comprises a sand discharging hole and a sand discharging channel, and a switch valve is arranged on the sand discharging channel. The back flushing device comprises a mounting frame, a pressing plate is arranged at the bottom of the mounting frame, a plurality of through holes are formed in the pressing plate, and the through holes are in position correspondence with the sand discharging hole. A mounting shaft is fixedly arranged on the pressing plate, a rotating plate is arranged on the mounting shaft, the mounting shaft penetrates through the rotating plate, and the rotating plate is rotatable relative to the pressing plate. One end of the rotating plate is fixedly connected with a pull spring, the other end of the pull spring is fixedly connected with the pressing plate, a limiting block is arranged on the pressing plate, and the limiting block is located at one side of the pull spring.

2. The backwashing device of the sediment sluicing system of a dam, according to claim 1, characterized in that, A guide rail is arranged on the mounting frame, a sliding block is slidably arranged on the guide rail, a motor is arranged on the mounting frame, a lead screw is arranged at the output end of the motor, and the lead screw is engaged with the sliding block.

3. The backwash device of the sediment sluicing system of a dam, according to claim 2, characterized in that, A pushing rod is fixedly arranged at the bottom of the sliding block.

4. The backwashing device of the sediment sluicing system of a dam, according to claim 3, characterized in that, ​

Images