Equipment for measuring concentration of offshore dredged sediment under complex wave current condition

Abstract

The invention discloses equipment for measuring the concentration of offshore dredged silt under the complex wave current condition. The equipment comprises a dredger, the dredger is provided with a spiral reamer type dredging pipe, the upper side of the silt suction end of the dredging pipe is fixedly connected with a winch, the winch drives a steel wire rope to be wound and unwound through a submersible motor, and a measuring cylinder is arranged at one end of the steel wire rope; an inner cylinder is fixedly connected into the measuring cylinder through a support, a circulation channel is formed between the inner cylinder and the measuring cylinder, an infrared sediment sensor is fixedly connected to the outer wall of the inner cylinder, a traction rod is slidably connected into the inner cylinder through a mounting frame, the traction rod is hinged to one end of a steel wire rope, and the traction rod is sleeved with an inflation-exhaust type floating ball. The two sides of the inflation-exhaust type floating ball are fixedly connected with exhaust main pipes respectively, and the exhaust main pipes are fixedly connected with a plurality of exhaust hoses. The measuring cylinder is equivalent to downstream sinking and floating, silt generated by construction diffuses downstream, the diffusion condition of the silt disturbed by construction in water can be easily detected, the concentration of the silt at different depths and positions can be monitored, and monitoring is more comprehensive.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of construction disturbance water body sediment concentration measurement, and particularly relates to a near-sea dredged sediment concentration measurement device under complex wave flow conditions. BACKGROUND

[0002] The dredging device is fixedly connected with a caisson at the upper portion of the inlet end of the circular casing, the caisson is a half-circular or cover-shaped cover body, the screw reamer is contained in the cover body, the screw reamer is convenient to transmit the dredged sediment, and the dredged sediment is prevented from diffusing, but in order to achieve good sealing effect and convenient conveying; in actual use, the dredged sediment is still lifted upwards and around when the screw reamer stirs the sediment on the riverbed, and secondary pollution around the water area is caused.

[0003] The concentration of the sediment in the water body is monitored by the prior art, fixed-point monitoring is generally adopted, the diffusion condition of the sediment at different positions in the water body cannot be tested, and the complex water flow change can cause the sediment group to bypass the monitor in the water body, and monitoring error is caused. SUMMARY

[0004] The present application aims at solving the problems in the prior art, and provides a near-sea dredged sediment concentration measurement device under complex wave flow conditions.

[0005] In order to achieve the above object, the present application adopts the following technical scheme: The near-sea dredged sediment concentration measurement device under complex wave flow conditions comprises a dredging ship, the dredging ship is provided with a screw reamer type dredging pipe, a winch is fixedly connected to the suction end of the dredging pipe, the winch drives a steel wire rope through a submersible motor, a measuring cylinder is arranged at one end of the steel wire rope; An inner cylinder is fixedly connected to the measuring cylinder through a support, a flow passage is formed between the inner cylinder and the measuring cylinder, an infrared sediment sensor is fixedly connected to the outer wall of the inner cylinder, a traction rod is slidably connected to the inner portion of the inner cylinder through a mounting bracket, the traction rod is hingedly connected to one end of the steel wire rope, an air charging-discharging type floating ball is sleeved on the traction rod, air discharge dry pipes are fixedly connected to the two sides of the air charging-discharging type floating ball, the air discharge dry pipes are controlled through an electric control valve, and a plurality of air discharge hoses are fixedly connected to the air discharge dry pipes. The air discharge hoses on the two sides are alternately blocked by the cover plates.

[0006] Preferably, the measuring cylinder is rotatably connected to a circular ring at the end away from the steel wire rope, a plurality of inclined blades are arranged in the circular ring, water flows through the inclined blades to make the circular ring rotate, the cover plate is fixedly connected to one side of the circular ring, and the cover plate is attached to the measuring cylinder and blocks one side of the air discharge hose.

[0007] Preferably, the inner cylinder is fixedly connected with a vertical rod at one end close to the annular ring, the vertical rod is fixedly connected with a waterproof box, the first sliding rod and the second sliding rod are slidably connected in the waterproof box, the first sliding rod and the second sliding rod are engaged through a gear, one end of the first sliding rod is fixedly connected with the traction rod, the support spring is fixedly connected between one end of the first sliding rod and the inner wall of the waterproof box, the annular ring is fixedly connected with a horizontal rod, the horizontal rod is fixedly connected with a limiting plate, and the first sliding rod or the second sliding rod can be prevented from rotating by the limiting plate when the first sliding rod or the second sliding rod extends out.

[0008] Preferably, the dredging pipe is fixedly connected with a first cover at the lower end, and the lower end of the dredging pipe is hingedly connected with a second cover, and the suction head at the lower end of the dredging pipe is located in the second cover.

[0009] Preferably, one end of the first cover is a flexible waterproof cloth, and the flexible waterproof cloth is fixed outside the second cover.

[0010] Preferably, a cavity is arranged in the second cover, water absorption holes are uniformly arranged on the lower edge of the outer wall of the second cover, a vacuum box is arranged in the second cover, a gate is arranged at the bottom of the vacuum box, and a one-way valve pipe is arranged between the vacuum box and the cavity.

[0011] Preferably, the mud concentration measuring device for measuring dredged mud comprises the following steps: Step one: the dredging ship is parked at a construction position, the dredging pipe is lowered, the second cover is in an inclined posture and the front end contacts the riverbed, the dredging pipe is further lowered, the second cover gradually covers the dredging area horizontally, and the mud raised in the process is filled into the vacuum box through the opening of the vacuum box, and the water containing the mud is filled into the vacuum box; Step two: the mud content generated in step one is measured by the measuring device, the speed at which the winch releases the steel wire rope is 10-15 times the speed of the water flow, the measuring cylinder sinks and floats in the water body according to the water flow, and the cooperation of the air charging and air exhausting type floating ball and the air exhaust main pipe realizes suspension at different depths in the water body; Step three: the winch winds the steel wire rope at a first speed, the winch forms an action force one on the traction rod through winding the steel wire rope at the first speed, the winch forms an action force two on the inclined blade through the water flow impacting the inclined blade when winding the steel wire rope at the first speed, the action force one minus the action force two is less than the tensile force of the support spring, the support spring is not deformed under stress, the second sliding rod and the first sliding rod do not produce alternating actions, the covering plate on one side of the annular ring blocks the air exhaust hose on the other side, and the air exhaust hose on the other side exhausts air. Step 4: The winch uses the second speed to wind up the wire rope. The winch forms a force three on the traction rod through the second speed winding of the wire rope. The water flow impacts the inclined blades through the second speed winding of the wire rope, forming a force four. The force three minus the force four is greater than the tension of the support spring. The support spring is stretched, the first slide bar moves and loses its obstruction to the limit plate. After the ring rotates, it is blocked by the extended second slide bar. The cover plate rotates to the other side to block the exhaust hose, allowing exhaust to be released from the other side of the measuring cylinder. Step 5: Repeat steps 1 to 4, and collect detection data cyclically during the upstream and downstream movement cycles of the measuring cylinder.

[0012] The advantages of this invention are as follows: The nearshore dredging sediment concentration measurement device provided by this invention, under complex wave and current conditions, is equipped with a dynamic monitoring function by inflating or deflating a float. The measuring cylinder is equivalent to floating with the current, and the sediment generated during construction diffuses with the current, making it easy to detect the diffusion of sediment disturbed by construction in the water. It can monitor the concentration of sediment at different depths and locations, making the monitoring more comprehensive.

[0013] Furthermore, the inflation-deflation float generates a reaction force by venting air through the vent hose on one side, causing the measuring cylinder to change its horizontal position in the water. This results in a wider measurement coverage downstream of the construction site and makes it easier to detect the spread of sediment during construction. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the basic structure of the present invention; Figure 2 This is a partial cross-sectional view of the internal structure of the second enclosure; Figure 3 This is a schematic diagram of the measuring cylinder, inner cylinder, and inflation-deflation float after a quarter section. Figure 4 This is a force analysis diagram of the present invention. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0016] Example 1 like Figures 1 to 4 As shown, the present invention provides a nearshore dredging sediment concentration measurement device under complex wave and current conditions, including a dredging vessel, which is the prior art. The dredging vessel is equipped with a spiral cutter type dredging pipe 2. A winch 3 is fixedly connected to the upper side of the suction end of the dredging pipe 2. The winch 3 is driven by a submersible motor to wind and unwind a steel wire rope 4. A measuring cylinder 5 is set at one end of the steel wire rope 4. The inner cylinder 6 is fixedly connected with the measuring cylinder 5 through a support, the measuring cylinder 5 is provided with a separation cavity and a float to enable the measuring cylinder 5 to be horizontally suspended in water (like the principle of a submarine), a flow passage is formed between the inner cylinder 6 and the measuring cylinder 5, the outer wall of the inner cylinder 6 is fixedly connected with an infrared sediment sensor 61, sediment contained in water is detected by the infrared sediment sensor 61 after passing through the flow passage, the detection technology belongs to the prior art, and the principle will not be described here, the inner cylinder 6 is slidably connected with a traction rod 63 through a mounting frame 62, one end of the traction rod 63 is hingedly connected with the steel wire rope 4, a charge-discharge type floating ball 64 is sleeved on the traction rod 63, an air charging pump is arranged on the dredging ship and charges the charge-discharge type floating ball 64 through a hose, the charge-discharge type floating ball 64 is fixedly connected with exhaust dry pipes 65 on both sides, the exhaust dry pipes 65 are controlled through electric control valves 66, the exhaust dry pipes 65 are fixedly connected with a plurality of exhaust hoses 67, and the exhaust hoses 67 on both sides are alternately blocked through cover plates 68.

[0017] The measuring cylinder 5 is rotatably connected with a circular ring 7 away from one end of the steel wire rope 4, a plurality of inclined blades 71 are arranged in the circular ring 7, water flows through the inclined blades 71 to make the circular ring 7 rotate, the cover plates 68 are fixedly connected with one side of the circular ring 7, the cover plates 68 are attached to the measuring cylinder 5 and block one side of the exhaust hoses 67, water flows between adjacent two inclined blades 71 to generate a lateral force, so that the circular ring 7 rotates.

[0018] One end of the inner cylinder 6 close to the circular ring 7 is fixedly connected with a vertical rod 8, the vertical rod 8 is fixedly connected with a waterproof box 81, a first sliding rod 82 and a second sliding rod 83 are slidably connected in the waterproof box 81, the first sliding rod 82 and the second sliding rod 83 are meshed through gears, one end of the first sliding rod 82 is fixedly connected with the traction rod 63, the support spring 84 is fixedly connected between one end of the first sliding rod 82 and the inner wall of the waterproof box 81, the circular ring 7 is fixedly connected with a cross rod 85, the cross rod 85 is fixedly connected with a limiting plate 86, the first sliding rod 82 or the second sliding rod 83 can be prevented from rotating through the limiting plate 86 when it extends out.

[0019] The charge-discharge type floating ball 64 is inflated or deflated, as shown, Figure 1 The measuring cylinder 5 rises or falls in the water body (A point, B point, C point, D point) in the rectangular box region H downstream of construction, compared with the prior art fixed-point monitoring, the measuring cylinder 5 has a dynamic monitoring function, and the measuring cylinder 5 is equivalent to sinking and floating with water, the sediment generated by construction is easily diffused into the sediment group and the sediment disturbed by construction is easily diffused in water, so that the concentration of sediment at different depths and positions can be monitored, and the monitoring is more comprehensive.

[0020] Further, the charge-discharge type floating ball 64 is deflated through the exhaust hose 67 on one side to generate a reaction force, so that the horizontal position of the measuring cylinder 5 in water changes, the measuring range is wide downstream of construction, and the sediment diffusion condition of construction is more easily detected.

[0021] Example 2 As Figures 1 to 4 shown, the dredging pipe 2 lower end fixed connection first cover 21, dredging pipe 2 lower end hinged connection second cover 22, dredging pipe 2 lower end of the suction head located in the second cover 22, first cover 21 one end of the flexible waterproof cloth 23, flexible waterproof cloth 23 fixed outside the second cover 22, the second cover 22 inside the cavity 24, the second cover 22 wall evenly distributed suction hole 25, the second cover 22 is provided with a vacuum box 26, the vacuum box 26 bottom is provided with a gate 27, the gate 27 is opened or closed by electric, the vacuum box 26 and the cavity 24 between the one-way valve pipe 28, water flow through the one-way valve pipe 28 one-way into.

[0022] In the first cover 21 lower end of the first embodiment with the river bed, the second cover 22 can rotate around the first cover 21, the second cover 22 first contact with the river bed and the weight of the slow embedded in the river bed silt, at this time the vacuum box 26 open the second cover 22 and the river bed contact generated by the silt suction into the vacuum box 26, the cover in the construction area generated by the silt suction, followed by the spiral auger type dredging pipe 2 work while pumping away, the method produces less sediment.

[0023] Due to the less sediment in the second embodiment, in the case of complex wave flow, the sediment group may avoid the detection of the fixed point position in the water body, so the measuring device disclosed in embodiment 1 is more suitable for the sediment monitoring produced by the construction of embodiment 2.

[0024] The sediment concentration measuring device for dredging sediment measurement includes the following steps: Step one: the dredging ship stops at the construction position, the dredging pipe 2 is lowered, the second cover 22 is in an inclined posture and the front end contacts the river bed, the dredging pipe 2 is further lowered, the second cover 22 gradually covers the dredging area horizontally, in this process, the silt raised by the opening of the vacuum box 26 is poured into the vacuum box 26, and thereafter the construction in the second cover 22, the amount of silt raised is reduced.

[0025] Step two: according to the sediment content produced in step one, the measuring device is measured, the speed of the winch 3 releasing the wire rope 4 is 10-15 times the water flow speed, the measuring cylinder 5 sinks and floats in the water body, and the cooperation of the air pump of the dredging ship and the air exhaust pipe 65 realizes the suspension at different depths in the water body (the principle of buoyancy and gravity balance of the measuring cylinder 5); Because the winch 3 releases the wire rope 4 much greater than the water flow speed, the wire rope 4 loses the traction force to the measuring cylinder 5, the measuring cylinder 5 is equivalent to sink and float with the water, and the sediment produced by the construction spreads along the water, which is easy to detect the diffusion of the sediment disturbed by the construction.

[0026] Step 3: The winch 3 winds up the wire rope 4 at the first speed. The winch 3 forms a force 1 on the traction rod 63 through the winding of the wire rope 4 at the first speed. The water flow impacts the inclined blade 71 through the winding of the wire rope 4 at the first speed, forming a force 2. The difference between the force 1 and the force 2 is less than the tensile force of the support spring 84. The support spring 84 does not deform under the force. The second slide rod 83 and the first slide rod 82 do not produce alternating movements. The cover plate 68 on one side of the ring 7 covers the exhaust hose 67 on one side, and the exhaust hose 67 on the other side vents air. On the one hand, the venting makes the volume of the inflation-deflation float 64 smaller, and the measuring cylinder 5 sinks in the water. On the other hand, the reaction force generated by the side venting makes the horizontal position of the measuring cylinder 5 in the water change. The measurement coverage is wide downstream of the construction site, making it easier to detect the spread of sediment during construction.

[0027] Step 4: The winch 3 uses the second speed to wind up the wire rope 4. The winch 3 forms a force three on the traction rod 63 through the second speed winding of the wire rope 4. The water flow impacts the inclined blade 71 through the second speed winding of the wire rope 4, forming a force four. The force three minus the force four is greater than the tension of the support spring 84. The support spring 84 is stretched, the first slide rod 82 moves and loses its obstruction to the limit plate 86. After the ring 7 rotates 180 degrees, it is blocked by the extended second slide rod 83. The cover plate 68 rotates to the other side to block the exhaust hose 67, so that the other side of the measuring cylinder 5 is vented. The horizontal position of the measuring cylinder 5 in the water changes to the other side. With the periodic change in the volume of the inflation-deflation float 64 and the horizontal movement caused by the venting on one side or the other side of the measuring cylinder 5, the position of the measuring cylinder 5 in the water keeps changing. On the one hand, it is easy to monitor the disturbance of construction sediment with the water flow. On the other hand, it monitors the diffusion of sediment in the water flow under complex wave currents, making the monitoring more comprehensive.

[0028] Step 5: Repeat steps 1 to 4, and collect detection data cyclically during the upstream pulling and downstream movement cycles of the measuring cylinder 5.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for measuring sediment concentration in nearshore dredging under complex wave and current conditions, comprising a dredging vessel equipped with a auger-type dredging pipe (2), characterized in that: The upper side of the suction end of the dredging pipe (2) is fixedly connected to a winch (3). The winch (3) is driven by a submersible motor to wind up and unwind the wire rope (4). A measuring cylinder (5) is set at one end of the wire rope (4). The inner cylinder (6) is fixedly connected to the measuring cylinder (5) by a bracket. A flow channel is formed between the inner cylinder (6) and the measuring cylinder (5). An infrared sediment sensor (61) is fixedly connected to the outer wall of the inner cylinder (6). The traction rod (63) is slidably connected to the inner cylinder (6) by a mounting bracket (62). The traction rod (63) is hinged to one end of the wire rope (4). An inflation-deflation float (64) is fitted on the traction rod (63). An exhaust pipe (65) is fixedly connected to both sides of the inflation-deflation float (64). The exhaust pipe (65) is controlled by an electric control valve (66). Several exhaust hoses (67) are fixedly connected to the exhaust pipe (65). The exhaust hoses (67) on both sides are alternately blocked by cover plates (68).

2. The nearshore dredging sediment concentration measurement device under complex wave and current conditions according to claim 1, characterized in that: The measuring cylinder (5) is rotatably connected to a ring (7) at the end away from the wire rope (4). Multiple inclined blades (71) are arranged in an array inside the ring (7). Water flows through the inclined blades (71) to make the ring (7) rotate. A cover plate (68) is fixedly connected to one side of the ring (7). The cover plate (68) fits against the measuring cylinder (5) and blocks the exhaust hose (67) on one side.

3. The nearshore dredging sediment concentration measurement device under complex wave and current conditions according to claim 2, characterized in that: The inner cylinder (6) is fixedly connected to a vertical rod (8) at one end near the ring (7). The vertical rod (8) is fixedly connected to a waterproof box (81). The first slide rod (82) and the second slide rod (83) are slidably connected inside the waterproof box (81). The first slide rod (82) and the second slide rod (83) are meshed by gears. One end of the first slide rod (82) is fixedly connected to a traction rod (63). One end of the first slide rod (82) is fixedly connected to a support spring (84) between it and the inner wall of the waterproof box (81). The ring (7) is fixedly connected to a horizontal rod (85). The horizontal rod (85) is fixedly connected to a limiting plate (86). The first slide rod (82) or the second slide rod (83) can extend and prevent the ring (7) from rotating through the limiting plate (86).

4. The nearshore dredging sediment concentration measurement device under complex wave and current conditions according to claim 1, characterized in that: The lower end of the dredging pipe (2) is fixedly connected to the first cover (21), and the lower end of the dredging pipe (2) is hinged to the second cover (22). The agitator head at the lower end of the dredging pipe (2) is located inside the second cover (22).

5. The nearshore dredging sediment concentration measurement device under complex wave and current conditions according to claim 4, characterized in that: One end of the first cover (21) is a flexible waterproof cloth (23), and the flexible waterproof cloth (23) is fixed to the outside of the second cover (22).

6. The nearshore dredging sediment concentration measurement device under complex wave and current conditions according to claim 5, characterized in that: The second cover (22) has an internal cavity (24), and the lower edge of the outer wall of the second cover (22) is evenly distributed with water absorption holes (25). The second cover (22) has a vacuum box (26) inside, and a gate (27) is provided at the bottom of the vacuum box (26). A one-way valve pipe (28) is provided between the vacuum box (26) and the cavity (24).

7. The nearshore dredging sediment concentration measurement device under complex wave and current conditions according to claim 6, characterized in that: The sediment concentration measurement equipment for dredged sediment includes the following steps: Step 1: The dredging vessel stops at the construction site, the dredging pipe (2) is lowered, the second cover (22) is tilted and the front end contacts the riverbed, the dredging pipe (2) is lowered further, and the second cover (22) is gradually placed horizontally over the dredging area. During this process, the mud and sand raised are poured into the vacuum box (26) by opening the vacuum box (26). Step 2: The sediment content generated in Step 1 is measured by measuring equipment. The speed at which the winch (3) releases the wire rope (4) is 10-15 times the speed of the water flow. The measuring cylinder (5) floats in the water body with the current. The air pump of the dredging vessel is used to inflate the inflatable-explosive float (64) and vent the exhaust pipe (65). The two work together to achieve suspension at different depths in the water body. Step 3: The winch (3) uses the first speed to wind up the wire rope (4). The winch (3) forms a force one on the traction rod (63) by winding up the wire rope (4) at the first speed. The water flow impacts the inclined blade (71) and forms a force two by winding up the wire rope (4) at the first speed. The force one minus the force two is less than the tension of the support spring (84). The support spring (84) does not deform under the force. The second slide rod (83) and the first slide rod (82) do not produce alternating actions. The cover plate (68) on one side of the ring (7) covers the exhaust hose (67) on one side, and the exhaust hose (67) on the other side exhausts the air. Step 4: The winch (3) uses the second speed to wind up the wire rope (4). The winch (3) forms a force three on the traction rod (63) by winding up the wire rope (4) at the second speed. The water flow impacts the inclined blade (71) and forms a force four by winding up the wire rope (4) at the second speed. The force three minus the force four is greater than the tension of the support spring (84). The support spring (84) is stretched, the first slide bar (82) moves and loses its obstruction to the limit plate (86). The ring (7) rotates 180 degrees and is blocked by the extended second slide bar (83). The cover plate (68) rotates to the other side and forms a blockage on the exhaust hose (67), so that the measuring cylinder (5) exhausts on the other side. Step 5: Repeat steps 1 to 4, and collect detection data in a cycle of upward and downward movement of the measuring cylinder (5).

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