阅读说明：本技术 一种箱式闸门自动清淤方法 (Automatic dredging method for box gate ) 是由 惠晓康 丁积杰 于 2021-09-18 设计创作，主要内容包括：本发明提供一种箱式闸门自动清淤方法,包括如下步骤：步骤一、向位于流量计量箱内的气体清淤装置中通入气体；步骤二、由气体清淤装置的出气端将气体逸出,利用逸出的气体扰动流量计量箱内的水流,避免水中泥沙沉积于流量计量箱内；本发明采用闸门自动清淤方法,使气体清淤装置中的气体由出气端逸出,对流量计量箱与闸门底部连接区域的水流进行扰动,以使水流不断流动,避免水中泥沙于该区域发生沉降,确保闸门能正常开合；采用流量计量箱,能够对流经箱体的水流进行计量,并能对储气管和明渠流量计进行防护,因此具有较好的实用性。(The invention provides an automatic dredging method for a box gate, which comprises the following steps: step one, introducing gas into a gas desilting device positioned in a flow metering box; step two, escaping the gas from the gas outlet end of the gas dredging device, disturbing the water flow in the flow metering box by using the escaped gas, and avoiding sediment in water from being deposited in the flow metering box; according to the automatic gate dredging method, gas in the gas dredging device escapes from the gas outlet end, and water flow in a region where the flow metering box is connected with the bottom of the gate is disturbed, so that the water flow continuously flows, sediment in water is prevented from settling in the region, and the gate can be opened and closed normally; adopt the flowmeter case, can measure the rivers of flowing through the box to can protect gas receiver and open channel flowmeter, consequently have better practicality.)

1. The utility model provides an automatic desilting method of box gate which characterized in that: the method comprises the following steps:

step one, introducing gas into a gas dredging device (4) positioned in a flow metering box (3);

and step two, escaping the gas from the gas outlet end of the gas dredging device (4), and disturbing the water flow in the flow metering box (3) by using the escaped gas to avoid sediment in water from being deposited in the flow metering box (3).

2. The automatic dredging method of box gate according to claim 1, characterized in that: the end of giving vent to anger of gaseous desilting device (4) sets up on the interior diapire of flow metering box (3), and the end of giving vent to anger of this gaseous desilting device (4) is located the one end that flow metering box (3) are close to the gate to make gaseous disturbance flow metering box (3) and gate bottom linkage area's rivers flow.

3. The automatic dredging method of box gate according to claim 1, characterized in that: the width of the gas escaping from the gas outlet end of the gas dredging device (4) is the same as the width of the inside of the flow metering box (3).

4. The automatic dredging method of box gate according to claim 1, characterized in that: gaseous desilting device (4) including be used for providing gaseous air supply pipe (41), set up gas storage pipe (42) on the diapire in flow metering box (3) and communicate with multiunit air cock (43) on gas storage pipe (42), multiunit the gas that air cock (43) discharged is used for disturbing flow metering box (3) and gate bottom linkage area's rivers.

5. The automatic dredging method of box gate according to claim 4, characterized in that: the air tap (43) is arranged as an air exhaust bolt, and the air inlet end of the air exhaust bolt is communicated with the air outlet end of the air storage pipe (42).

6. The automatic dredging method of box gate according to claim 1, characterized in that: the air tap (43) is set as a vent valve, and the air inlet end of the vent valve is communicated with the air outlet end of the air storage pipe (42).

7. The automatic dredging method of box gate according to claim 4, characterized in that: flow metering box (3) include box (31), open channel flowmeter (32) and probe (33), the play water end of box (31) is connected in the end of intaking of gate, open channel flowmeter (32) set up on box (31), probe (33) set up to the multiunit, and multiunit probe (33) evenly lay on the inner wall of box (31), and the multiunit probe (33) all link to each other with open channel flowmeter (32) electrical property, open channel flowmeter (32) are measured the discharge of water in the flow-through box (31) by multiunit probe (33).

8. The automatic dredging method of box gate according to claim 6, characterized in that: the side wall of box (31) sets up to inlayer (311) and skin (312), form a hollow structure between inlayer (311) and the skin (312), open channel flowmeter (32) set up in hollow structure inside, probe (33) evenly distribute on the inner wall of inlayer (311).

9. The automatic dredging method of box gate according to claim 7, characterized in that: the gas storage pipe (42) is arranged in the hollow structure, the gas nozzle (43) is arranged on the inner bottom wall of the inner layer (311), and the gas inlet end of the gas nozzle (43) is connected with the gas outlet end of the gas storage pipe (42).

10. The automatic dredging method of box gate according to claim 1, characterized in that: a protection plate (5) is arranged between the air tap (43) and the inner layer (311), and the protection plate (5) is used for protecting and sealing the air tap (43).

Technical Field

The invention relates to the technical field of gate dredging, in particular to an automatic dredging method for a box gate.

Background

A gate is a control facility for intercepting and discharging water channels. It is also an important component of hydraulic building, and can be used for intercepting water flow, controlling water level, regulating flow rate, discharging silt and floating material, etc. When the gate is selected, the gate needs to be compared and determined according to the working property, the setting position, the operating condition gate hole span, the opening and closing force, the engineering cost and the like by combining the self-demand and the application region. Wherein there are very many irrigated areas near the yellow river basin, irrigate the irrigated area farmland through introducing yellow river rivers to provide sufficient water source for crops, but in the middle of the basin, its region soil erosion and water loss is serious in place, leads to aquatic silt content higher, and often has more large-scale floater, so there are following drawbacks:

(1) when the gate is in a closed state, silt in water flow at the gate opening can be settled, so that a large amount of silt is deposited at the gate opening, the deposited silt is easy to open and close the gate normally, and the sealing property of the gate is reduced;

(2) in the middle of the gate desilting process, can often adopt large-scale mechanical desilting equipment to clear up, because the gate installation area's limitation causes the gate to take place to damage easily, leads to the gate can not normal use, consequently the practicality of this desilting method is relatively poor.

(3) When using to the gate, discharge measuring device exposes outside usually, and the phenomenon of getting damp appears in equipment when using easily for a long time, influences its measurement accuracy and life, and current protection mode flexibility is relatively poor, and the security is not high.

Disclosure of Invention

The invention mainly aims to solve the problems in the prior art and provides an automatic dredging method for a box gate.

In order to solve the technical problems, the invention adopts the technical scheme that: an automatic dredging method for a box gate comprises the following steps:

step one, introducing gas into a gas desilting device positioned in a flow metering box;

and step two, escaping the gas from the gas outlet end of the gas dredging device, and disturbing the water flow in the flow metering box by using the escaped gas to avoid sediment in water from being deposited in the flow metering box.

Further, the end of giving vent to anger of gaseous desilting device sets up on the interior diapire of flow metering box, and the end of giving vent to anger of this gaseous desilting device is located the one end that flow metering box is close to the gate to make the rivers of gas disturbance flow metering box and gate bottom linkage area flow.

Further, the width of the gas escaping from the gas outlet end of the gas dredging device is the same as the width of the inside of the flow metering box.

Further, gaseous desilting device is including being used for providing gaseous air supply pipe, setting up the gas receiver on the diapire in flow measurement case and communicate the multiunit air cock on the gas receiver, multiunit the gas that the air cock discharged is used for disturbing flow measurement case and gate bottom linkage area's rivers.

Further, the air tap is set as an air cock, and the air inlet end of the air cock is communicated with the air outlet end of the air storage pipe.

Further, the air tap is set as a vent valve, and the air inlet end of the vent valve is communicated with the air outlet end of the air storage pipe.

Further, the air tap is arranged as an air vent plug, and an air inlet end of the air vent plug is communicated with an air outlet end of the air storage pipe.

Further, the flow metering box includes box, open channel flowmeter and probe, the play water end of box is connected in the end of intaking of gate, the open channel flowmeter sets up on the box, the probe sets up to the multiunit, and the multiunit is probed and is evenly laid on the inner wall of box, and the multiunit the probe all links to each other with open channel flowmeter electrical property, the open channel flowmeter is measured the internal discharge of flow through box by the multiunit probe.

Further, the side wall of the box body is arranged to be an inner layer and an outer layer, a hollow structure is formed between the inner layer and the outer layer, the open channel flowmeter is arranged in the hollow structure, and the probes are uniformly distributed on the inner wall of the inner layer.

Further, the gas receiver sets up inside hollow structure, the air cock sets up and lays on the interior diapire of inlayer, and the inlet end of this air cock is connected with the end of giving vent to anger of gas receiver.

Further, a protection plate is arranged between the air tap and the inner layer and used for protecting and sealing the air tap.

Further, the gate comprises a door frame connected to the box body, a gate plate arranged on the door frame in a sliding mode, and a lifting mechanism used for driving and connecting the door frame and the gate plate, wherein the lifting mechanism is used for controlling the opening and closing of the gate.

Further, hoist mechanism is including connecting in the drive unit at door frame top, connecting in the threaded rod of drive unit output and the thread bush of arranging the threaded rod with revolving the supporting, the threaded rod rotates and sets up in the top of door frame, the thread bush is vertical to be connected on the flashboard.

Further, drive unit is including setting up in the protective housing at door frame top and setting up in the inside speed reduction drive module of protective housing, the output of speed reduction drive module is connected in the input of threaded rod to drive the threaded rod by this speed reduction drive module and rotate.

Further, hoist mechanism is including setting up in the power unit at door frame top, connecting in the haulage cable of power unit output and connecting in the lift bar of haulage cable tip, the lift bar slides and wears to locate on the door frame, and this power unit drives the lift bar through the haulage cable and drives the flashboard and carry out elevating movement.

Further, the power unit includes the protection casing of connecting on the door frame, set up in the inside speed reduction power module of protection casing, connect the drive shaft of speed reduction power module output and fix the traction wheel of locating the drive shaft tip of cover, speed reduction power module connects on the door frame, the traction cable twines on the traction wheel.

Furthermore, a group of fastening connecting pieces are arranged at the top of the lifting rod and the middle of the lifting rod respectively, and the two groups of fastening connecting pieces are connected with two ends of the traction cable respectively.

Furthermore, an elastic protection sleeve is sleeved on the lifting rod, the elastic protection sleeve is respectively connected with the rod body of the lifting rod and the bottom of the protection cover, and the elastic protection sleeve is used for protecting the traction cable.

Further, fastening connection spare is including fixed the dead lever of wearing to locate the lifter middle part, wear to locate the stud on the dead lever, join in marriage soon in stud one end and support and lean on the nut on the dead lever, join in marriage soon in the compression sleeve pipe of the stud other end and join in marriage soon the locking bolt on the sleeve pipe, the inside of compression sleeve pipe is worn to locate by the tip of haulage cable, locking bolt is used for being fixed in inside the compression sleeve pipe to the haulage cable in the compression sleeve pipe.

Furthermore, a plurality of groups of angle steel connecting pieces are symmetrically arranged on two sides of the door frame.

The invention has the advantages and positive effects that:

(1) the automatic gate dredging device is novel in structure, stable and reliable, and adopts an automatic gate dredging method, so that gas escaping from the gas outlet end of the gas dredging device disturbs water flow in a connecting area of the flow metering box and the bottom of the gate, so that the water flow continuously flows, a large amount of sediment is prevented from being deposited in the area, the disturbed water flow can also clear partial sediment previously deposited at the bottom of the gate, and the dual effects of preventing and dredging are realized; the normal opening and closing of the gate can be ensured, so that the gate has better sealing property;

(2) the invention has the advantages that the gas outlet end of the gas storage pipe in the gas dredging device is provided with the plurality of groups of the gas exhaust bolts or the gas permeable valves, so that the gas can be released, simultaneously, the silt in water can be prevented from flowing back into the gas storage pipe, the gas exhaust bolts or the gas permeable valves have better corrosion resistance, the service life of the gas dredging device can be prolonged, and the gas escaping through the gas exhaust bolts or the gas permeable valves is more uniform, so the dredging effect of the invention is better;

(3) the flow metering box is adopted, so that the flow of water flowing through the interior of the box body can be measured, and the water flow entering the ditch is counted; and the box comprises inlayer and skin, forms hollow structure between the two, can protect open channel flowmeter and gas storage pipe, avoids long-term the use and takes place to rust or corrode the phenomenon, and the design is comparatively nimble, and the security is higher.

Drawings

FIG. 1 is a schematic view of the entire structure of a lock gate in embodiment 1;

FIG. 2 is a schematic structural view of an open channel flow meter;

FIG. 3 is a schematic view of the connection structure between the air supply pipe, the air storage pipe and the air faucet and the box body;

FIG. 4 is a schematic structural view of a lifting mechanism in embodiment 1;

FIG. 5 is a schematic view showing the entire structure of a lock gate in embodiment 4;

fig. 6 is a schematic structural view of the lifting mechanism in embodiment 4.

In the figure: 1. a door frame; 2. a shutter plate; 3. a flow metering box; 31. a box body; 311. an inner layer; 312. an outer layer; 32. an open channel flow meter; 33. a probe; 4. a gas dredging device; 41. a gas supply pipe; 42. a gas storage pipe; 43. an air tap; 5. a protection plate; 611. a drive unit; 6111. a protective shell; 6112. a deceleration driving module; 612. a threaded rod; 613. a threaded sleeve; 621. a power unit; 6211. a protective cover; 6212. a deceleration power module; 6213. a drive shaft; 6214. a traction wheel; 622. a traction cable; 623. a lifting bar; 7. fastening a connecting piece; 71. fixing the rod; 72. a double-ended screw; 73. a nut; 74. compressing the sleeve; 75. locking the bolt; 8. an elastic protective sleeve; 9. angle steel connecting piece.

Detailed Description

For a better understanding of the present invention, reference is made to the following detailed description and accompanying drawings that illustrate the invention.

Example 1:

as shown in fig. 1-4, the automatic dredging method for the box gate adopted by the invention comprises the following steps:

step one, introducing gas into a gas desilting device 4 positioned in a flow metering box 3;

and step two, the gas is escaped from the gas outlet end of the gas dredging device 4, the escaped gas is utilized to disturb the water flow in the flow metering box 3, so that the sediment in the water is prevented from being deposited in the flow metering box 3, and the sediment deposited in the area is taken away by the water flow.

Specifically, after the gas is discharged from the gas outlet end of the gas dredging device 4, the escaped gas can form gas flow, the gas flow can move towards the water surface, the flowing process of the gas can disturb the water flow around the bottom wall in the flow metering box 3, and the water flow is driven to move continuously, so that the sediment in the water can not be settled, and the sediment amount of the sediment in the water can be reduced; in the flowing process of the disturbed water flow, the disturbed water flow can also drive the excessive silt accumulated previously and on the bottom wall in the flow metering box 3 to move, so that the deposition amount of the silt is reduced, and the effects of silt prevention and dredging are realized;

when the gate is opened, rivers in the river course can be held the entering by the intaking of flow measurement case 3, flow to the ditch in the middle of after the gate, the disturbance effect that this moment lies in gas desilting device 4 on the bottom wall in flow measurement case 3 will be far less than the flow effect that is less than rivers to rivers, and simultaneously, the silt of aquatic can be taken away to the rivers of flow, make it can not deposit in a large number in the connection position between gate and flow measurement case 3, so even gas desilting device 4 does not carry out the desilting to the connection region during this time, the deposit of a large amount of silt also can not appear.

Further, the gas outlet end of the gas dredging device 4 is arranged on the inner bottom wall of the flow metering box 3, the gas outlet end of the gas dredging device 4 is positioned at one end, close to the gate, of the flow metering box 3, so that water flow in a connecting area of the gas disturbance flow metering box 3 and the bottom of the gate flows, the gas outlet end of the gas dredging device 4 is positioned at the bottom of the flow metering box 3, the gas outlet end of the gas dredging device can be always in contact with the water flow, and the gas dredging device 4 can be ensured to continuously work; because the end of giving vent to anger of gaseous desilting device 4 is close to the gate bottom, when gaseous end discharge by giving vent to anger, can carry out the disturbance to the rivers of the linkage region between gate bottom and the flow metering box 3 to guarantee that a large amount of subsides can not appear in the silt in this region rivers, thereby ensure that the gate can open smoothly and close, so that the gate has better leakproofness.

Further, the width that gaseous 4 of gaseous desilting device was given vent to anger and is held escaping gas is the same with the inside width of flow measurement case 3, ensures that gaseous desilting device 4 is carrying out the desilting in-process, can not transport silt to the marginal part of flow measurement case 3 interior diapire, guarantees the clearance effect of silt.

Further, the gas dredging device 4 comprises a gas supply pipe 41 for providing gas, a gas storage pipe 42 arranged on the inner bottom wall of the flow measuring box 3 and a plurality of groups of gas nozzles 43 communicated with the gas storage pipe 42, gas discharged by the plurality of groups of gas nozzles 43 is used for disturbing water flow in a connecting area between the flow measuring box 3 and the bottom of the gate and is also used for taking away sediment deposited in the connecting area, when the gas dredging device 4 is used for dredging the connecting area between the bottom of the gate and the flow measuring box 3, gas is introduced into the gas supply pipe 41 so that the gas reaches the gas storage pipe 42 through the gas supply pipe 41 and is discharged through the plurality of groups of gas nozzles 43 connected with the output end of the gas storage pipe 42, the discharged gas forms gas flow in the flow measuring box 3, the gas flow can disturb the water flow in the connecting area so as to make the water flow continuously flow, deposition is avoided when the water flow is kept stand, and the effect of preventing the silt is achieved, the gate can be ensured to be smoothly opened and closed, and the sealing performance of the gate is ensured; meanwhile, the flowing water flow can also clean the sediment deposited in the area previously, and the dredging effect is realized.

Further, air cock 43 sets up to the air cock, the inlet end of air cock and the end intercommunication of giving vent to anger of gas receiver 42, utilize the ventilation effect of air cock, can make gaseous form the air current after being discharged by the air cock, thereby disturb its near beam, and simultaneously, adopt the air cock can also prevent that the silt of aquatic from flowing backward to the middle of the gas receiver 42, and the corrosion resistance of air cock is better, and the cost is lower, can effectual improvement gaseous desilting device 4's life, reduce its maintenance probability, so the practicality is better.

Further, flow measurement case 3 includes box 31, open channel flow meter 32 and probe 33, the end of intaking in the gate is connected to the play water end of box 31, open channel flow meter 32 sets up on box 31, probe 33 sets up to the multiunit, multiunit probe 33 evenly lays on the inner wall of box 31, and multiunit probe 33 all links to each other with open channel flow meter 32 electrical property, open channel flow meter 32 is measured the discharge of water in the box 31 of convection current through multiunit probe 33, cooperation through between box 31 and the open channel flow meter 32 is used, can make statistics of and measure the discharge of water in the box 31, and through setting up box 31, can also prevent that great floaters such as branch from entering into in the river course in the gate, avoid the gate to be blocked.

Further, the lateral wall of box 31 sets up to inlayer 311 and outer 312, form a hollow structure between inlayer 311 and the outer 312, open channel flowmeter 32 sets up inside hollow structure, probe 33 evenly lays on the inner wall of inlayer 311, gas receiver 42 sets up inside hollow structure, air cock 43 sets up and lays on the interior diapire of inlayer 311, and the inlet end of this air cock 43 is connected with the end of giving vent to anger of gas receiver 42, adopt the hollow structure who constitutes between inlayer 311 and the outer 312, can effectually protect gas receiver 42 and open channel flowmeter 32, improve the security and the flexibility of its use, also avoid gas receiver 42 to use for a long time and the rust phenomenon appears corroding simultaneously.

Further, the gate comprises a door frame 1 connected to the box body 31, a gate plate 2 slidably arranged on the door frame 1, and a lifting mechanism for driving and connecting the door frame 1 and the gate plate 2, wherein the lifting mechanism is used for controlling the opening and closing of the gate; the lifting mechanism comprises a driving unit 611 connected to the top of the door frame 1, a threaded rod 612 connected to the output end of the driving unit 611, and a threaded sleeve 613 screwed on the threaded rod 612, wherein the threaded rod 612 is rotatably arranged at the top of the door frame 1, and the threaded sleeve 613 is vertically connected to the gate plate 2; the driving unit 611 comprises a protective shell 6111 arranged at the top of the door frame 1 and a deceleration driving module 6112 arranged inside the protective shell 6111, an output end of the deceleration driving module 6112 is connected to an input end of the threaded rod 612, the deceleration driving module 6112 drives the threaded rod 612 to rotate, the lifting action of the gate 2 is controlled by the lifting mechanism, so that the gate discharges and stops water flow, the deceleration driving module 6112 drives the threaded rod 612 to rotate, the threaded rod 612 drives the threaded sleeve 613 to ascend along the threaded rod 612 through threads, and the threaded sleeve 613 drives the gate 2 to ascend, so that the gate is opened, and water flow in a river channel is discharged into a water channel; similarly, when closing the gate, the control deceleration driving module 6112 drives the threaded rod 612 to rotate reversely, so that the threaded sleeve 613 gradually descends along the threaded rod 612, and drives the gate plate 2 to slide down the door frame 1 until the bottom of the gate plate 2 abuts against the door frame 1, and water flow is cut off.

Furthermore, a plurality of groups of angle steel connecting pieces 9 are symmetrically arranged on two sides of the door frame 1, and the door frame 1 of the gate can be fixed in the water channel by using the plurality of groups of angle steel connecting pieces 9 and bolts.

Example 2:

the difference with embodiment 1 lies in that air cock 43 sets up to the breather valve, and the inlet end of breather valve is linked together with the gas outlet end of gas storage pipe 42, has better water-proof effects and corrosion-resistant effect, improves product life, and this breather valve still has resistant high low temperature and ageing resistance, improves the reliability in the harsh environment of product.

Example 3:

the difference between this embodiment and embodiments 1 and 2 is that the air nozzle 43 can also be configured as an air vent plug, and has the characteristics of good air permeability, strong corrosion resistance, strong adaptability, and long service life, and therefore has better practicability.

Example 4:

as shown in fig. 5-6, the difference from the above embodiment is that the lifting mechanism includes a power unit 621 disposed on the top of the door frame 1, a pulling cable 622 connected to the output end of the power unit 621, and a lifting rod 623 connected to the end of the pulling cable 622, the lifting rod 623 is slidably disposed on the door frame 1, the power unit 621 drives the lifting rod 623 to drive the shutter 2 to move up and down through the pulling cable 622, the power unit 621 includes a protective cover 6211 connected to the door frame 1, a deceleration power module 6212 disposed inside the protective cover 6211, a driving shaft 6213 connected to the output end of the deceleration power module 6212, and a pulling wheel 6214 fixedly secured to the end of the driving shaft 6213, the deceleration power module 6212 is connected to the door frame 1, the pulling cable 622 is wound on the pulling wheel 6214, when the door is opened, the driving shaft 6213 connected to the output end of the deceleration power module 6212 rotates, the pulling wheel 6214 is driven by the driving shaft 6213 to rotate, the traction wheel 6214 winds the traction cable 622 between the middle part of the lifting rod 623 and the traction wheel 6214, so that the traction cable 622 drives the lifting rod 623 to ascend, and the lifting rod 623 drives the gate plate 2 to slide on the door frame 1, meanwhile, the traction wheel 6214 releases the traction cable 622 between the top of the lifting rod 623 and the traction wheel 6214, so that the restriction between the traction cable 622 and the lifting rod 623 is avoided, the gate is opened, and water flows are discharged into the canal from the river channel; when the gate is closed, the speed reduction power module 6212 drives the driving shaft 6213 to rotate reversely, so that the driving shaft 6213 drives the traction wheel 6214 to rotate reversely, at the moment, the traction cable 622 between the traction wheel 6214 and the top end of the lifting rod 623 is wound on the traction wheel 6214, the traction cable 622 between the middle part of the lifting rod 623 and the traction wheel 6214 is released, and slides down to the initial position by the gravity of the gate plate 2, so that the water flow flowing into the ditch is cut off.

Furthermore, a set of fastening connectors 7 is respectively disposed at the top of the lifting bar 623 and the middle of the lifting bar 623, the two sets of fastening connectors 7 are respectively connected to two ends of the traction cable 622, an elastic protection sleeve 8 is sleeved on the lifting bar 623, the elastic protection sleeve 8 is respectively connected to the shaft of the lifting bar 623 and the bottom of the protection cover 6211, the elastic protection sleeve 8 is used for protecting the traction cable 622, the fastening connectors 7 include a fixing rod 72 fixedly disposed at the middle of the lifting bar 623, a double-headed screw 72 disposed on the fixing rod 72, a nut 73 rotatably disposed at one end of the double-headed screw 72 and abutted against the fixing rod 72, a pressing sleeve 74 rotatably disposed at the other end of the double-headed screw 72, and a locking bolt 75 rotatably disposed on the sleeve, the end of the traction cable 622 is disposed inside the pressing sleeve 74, the locking bolt 75 is used for fixing the traction cable 622 inside the pressing sleeve 74, through the cooperation among the fixing rod 71, the double-threaded screw 72 and the nut 73, the two ends of the traction cable 622 can be fixedly connected to the top and middle parts of the lifting rod 623, and meanwhile, the tightness degree of the traction cable 622 can be adjusted through adjusting the position of the nut 73 on the double-threaded screw 72.

In addition, the above mentioned between the box 31 and the doorframe 1, between the open channel flowmeter 32 and the box 31, between the gas storage tube 42 and the box 31, between the protection cover 6211 and the doorframe 1, between the deceleration driving module 6112 and the doorframe 1, between the thread sleeve 613 and the shutter 2, between the protection shell 6111 and the doorframe 1, between the deceleration power module 6212 and the protection shell 6111, between the elastic protection sleeve 8 and the lifting rod 623, between the elastic protection sleeve 8 and the protection cover 6211, between the angle steel connecting piece 9 and the doorframe 1 can be connected by bolting, the deceleration driving module 6112 and the deceleration power module 6212 can both adopt the deceleration motor or the combination of the reducer and the driving motor, so as to make the shutter 2 move smoothly on the doorframe 1, wherein the driving shaft 6213 and the traction wheel 6214 can adopt the spline connection, the middle part of the traction cable 622 is fixed on the traction wheel 6214, so as to ensure that the driving shaft 6213 can not slip when winding the traction cable 622 through the traction wheel 6214, the elastic protection sleeve 8 can be made of rubber so as to protect the traction cable 622, and the open channel flowmeter 32 can adopt one of a Doppler open channel flowmeter 32, an ultrasonic open channel flowmeter 32 or a multichannel open channel flowmeter 32; the specific structures and working principles of the door frame 1, the gate plate 2, the open channel flowmeter 32, the deceleration driving module 6112, the deceleration power module 6212, the double-threaded screw 72, the elastic protection sleeve 8 and the angle steel connecting piece 9 in the above description belong to the prior art in the technical field, and the invention does not improve the structures and working principles, so that the detailed description is omitted.

The automatic gate dredging device is novel in structure, stable and reliable, and adopts an automatic gate dredging method, so that gas escaping from the gas outlet end of the gas dredging device 4 disturbs water flow in a connecting area of the flow metering box 3 and the bottom of the gate, so that the water flow continuously flows, a large amount of sediment is prevented from being deposited in the area, and the disturbed water flow can also clear partial sediment previously deposited at the bottom of the gate, thereby realizing double effects of preventing and dredging; the normal opening and closing of the gate can be ensured, so that the gate has better sealing property; according to the invention, the plurality of groups of air exhaust plugs or vent valves are arranged at the air outlet end of the air storage pipe 42 in the gas dredging device 4, so that the gas can be released, the sediment in water can be prevented from flowing backwards into the air storage pipe 42, the corrosion resistance is good, the service life of the gas dredging device 4 can be prolonged, and the gas escaping through the air exhaust plugs or the vent valves is uniform, so that the dredging effect is better; the flow measuring box 3 is adopted, so that the flow of water passing through the interior of the box body 31 can be measured, and the water flow entering a water channel is counted; the box body 31 is composed of an inner layer 311 and an outer layer 312, a hollow structure is formed between the inner layer 311 and the outer layer 312, the open channel flowmeter 32 and the gas storage pipe 42 can be protected, the phenomenon of rusting or corrosion caused by long-term use is avoided, the design is flexible, the safety is high, and taking the embodiment 1 as an example, the specific working principle of the invention is as follows:

when water flow needs to be introduced into the canal, the speed reduction driving module 6112 in the lifting mechanism drives the threaded rod 612 to rotate, so that the threaded rod 612 drives the threaded sleeve 613 to ascend through the threads, the threaded sleeve 613 drives the gate plate 2 connected with the threaded sleeve to ascend until the gate is opened, and at the moment, the water flow in the river channel is discharged; after discharging is finished, the speed reduction driving module 6112 is controlled to drive the threaded rod 612 to rotate reversely, so that the threaded sleeve 613 gradually descends along the threaded rod 612 and drives the gate plate 2 to slowly slide down on the door frame 1 until the bottom of the gate plate 2 is abutted against the door frame 1 to cut off water flow entering the ditch;

when the gas dredging device 4 is used for dredging a connecting area between the bottom of the gate and the flow metering box 3, gas is introduced into the gas supply pipe 41 so that the gas reaches the gas storage pipe 42 through the gas supply pipe 41 and is discharged through the plurality of groups of gas nozzles 43 connected with the output end of the gas storage pipe 42, the discharged gas forms gas flow in the flow metering box 3, and the gas flow can disturb water flow in the area so as to enable the water flow to continuously flow and avoid deposition when the water flow is kept stand; meanwhile, the flowing water flow can also take away the silt previously deposited in the area so as to clean the silt deposited in the area.

The embodiments of the present invention have been described in detail, but the present invention is only the preferred embodiments of the present invention, and is not to be considered as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.