Underwater trash holding screen device of environment-friendly cutter suction dredger for rivers, lakes and reservoirs

Abstract

The utility model relates to an underwater trash holding screen device of an environment-friendly cutter suction dredger for rivers, lakes and reservoirs. The underwater trash holding screen device comprises a trash holding screen body located below the cutter suction dredger and a lifting unit arranged between the trash holding screen body and the cutter suction dredger. The lifting unit comprises a plurality of lowering arms slidably connected to the periphery of the cutter suction dredger in the longitudinal direction and a driving assembly connected with the lowering arms, the lowering arms are fixedly connected with the trash holding screen body, and the driving assembly can drive the trash holding screen body to reciprocate in the longitudinal direction through the lowering arms. The device can isolate a shallow water body in a construction area from a bottom construction stirring water body, reduce diffusion of a turbid water body generated by construction operation to the surface of the water body, keep the water body at a relatively shallow depth clean, and reduce the diffusion rate of suspended particles to the shallow water body, so that the water quality of the water body in the construction area is improved, and the construction efficiency is improved. The method has important practical value for protecting water resources, maintaining ecological balance and improving landscape quality.

Description

TECHNICAL FIELD

[0001] The utility model relates to the environmental protection dredging technical field especially, relate to a river lake and reservoir environmental protection cutter suction dredger underwater pollution screen device. BACKGROUND

[0002] In the river lake and reservoir ecological dredging project, the commonly used method is to use the environmental protection cutter suction dredger to carry out the dredging of the polluted bottom mud of the water body bottom, to restore its original volume and depth, and to improve the water quality and ecological environment. But in the process of dredging construction of the cutter suction dredger, the stirring effect of the cutter head of the cutter suction dredger on the bottom mud will produce a large amount of suspended particles in the water body bottom, and part of the particles will be diffused in the water body without being sucked by the suction pipe of the mud pump, thereby causing secondary pollution to the water body in the dredging area.

[0003] In order to avoid the secondary pollution of the suspended particles in the water body, a pollution screen is usually set at the boundary of the dredging area. The pollution screen is a barrier structure set in the water body, which is used to intercept the suspended particles, floating objects, garbage and pollutants, prevent them from entering the surrounding water area, and play a role in protecting the water quality and water ecological environment.

[0004] The top of the traditional pollution screen relies on the float to float on the water surface, and forms a vertical pollution screen barrier under the action of gravity, which can only limit the horizontal diffusion of the pollutants in the water body, and only prevent the horizontal flow of the water body, hinder the horizontal exchange of the water body, and play a certain role in horizontal interception of pollutants. However, the suspended liquid produced by the construction of the cutter suction dredger is usually located in the deep water body, and there is no pollution screen that can limit the diffusion of the suspended liquid in the construction area of the cutter suction dredger to the shallow layer. After the suspended liquid produced by the construction is diffused to the water surface, it causes unnecessary secondary pollution to the shallow water body, and a lot of time is needed to precipitate to the water bottom, and the original water quality can be restored after a long time. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problems in the prior art, provides a river lake and reservoir environmental protection cutter suction dredger underwater pollution screen device, which separates the shallow water body in the construction area from the bottom construction stirred water body, reduces the diffusion of the turbid water body to the water surface due to the construction operation, thereby improving the water quality of the water body in the construction area, and has important practical value for protecting water resources, maintaining ecological balance and improving landscape quality.

[0006] The utility model is realized by the following technical solutions:

[0007] The utility model relates to a kind of river lake environmental protection cutter suction dredger underwater trash screen devices, including the trash screen body located below cutter suction dredger and the lifting unit being set between trash screen body and cutter suction dredger, the lifting unit includes multiple drop arms being slidably connected around cutter suction dredger in longitudinal direction, drive assembly connected with drop arm, the drop arm is fixedly connected with trash screen body, and the drive assembly can drive the trash screen body reciprocatingly move along longitudinal direction by drop arm.

[0008] According to the above technical solution, preferably, the drive assembly drives the drop arm to reciprocate along the longitudinal direction through gear and rack engagement.

[0009] According to the above technical solution, preferably, the side wall of the cutter suction dredger is fixedly connected with a fixed hoop, the drop arm is arranged through the fixed hoop, and the drive assembly includes a starting machine located on the deck of the cutter suction dredger and a driving wheel connected with the starting machine.

[0010] According to the above technical solution, preferably, one fixed wheel and one driving wheel are respectively arranged on the starting machine, and act on both sides of the drop arm.

[0011] According to the above technical solution, preferably, four fixed hoops are respectively fixedly connected before and after the two sides of the cutter suction dredger, and each fixed hoop is respectively provided with a group of drop arms and drive assemblies.

[0012] According to the above technical solution, preferably, the trash screen body includes a support frame and a trash screen connected in the support frame, the bottom of the drop arm is fixedly connected with the support frame, and the top of the drop arm is fixedly connected with support arms around the support frame.

[0013] According to the above technical solution, preferably, a plurality of horizontal rods and vertical rods are arranged inside the support frame, the trash screen is made of nylon water-permeable cloth, and the trash screen and the support frame are connected by binding belts.

[0014] According to the above technical solution, preferably, a cutter hole and a steel pile hole are formed in the middle of the trash screen body.

[0015] According to the above technical solution, preferably, floating bodies are connected around the support frame by fixed cables.

[0016] According to the above technical solution, preferably, the length of the trash screen body is 2-3 times the length of the cutter suction dredger, and the width of the trash screen body is 1.5-2 times the width of the cutter suction dredger.

[0017] The utility model has the beneficial effects that:

[0018] The utility model discloses a follow environmental protection cutter suction ship synchronous movement can be realized, and the cutter suction ship drives into the construction area and can enter the construction area, drives off the construction area and withdraws, and the trash screen also removes, and moves with the source of pollutant.

[0019] Meanwhile, the trash screen device is arranged at the lower part of the environmental protection cutter suction dredger, the position of the trash screen structure in the water body is adjusted through the lowering and lifting mechanism, the turbid liquid caused by the water body stirring of the cutter suction ship is limited below a certain depth, the deep turbid water body is prevented from diffusing to the shallow water body, the water body of the relatively shallow depth is kept clean, and the rate of the suspended particulate matter diffusing to the shallow water body is reduced.

[0020] In addition, the turbid water body generated in the construction process of the environmental protection cutter suction ship can be limited to the deep water body below the trash screen structure, the suspended particulate matter in the water body can be quickly deposited to the bottom of the water body, the deposition time of the suspended particulate matter in the water body is shortened, and the water quality recovery speed of the water body in the construction area is accelerated. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The utility model discloses a front oblique schematic view shows;

[0022] Figure 2 The utility model discloses a front part side view shows;

[0023] Figure 3 The utility model discloses a detailed structure schematic view shows;

[0024] Figure 4 The utility model discloses a side schematic view shows;

[0025] Figure 5 The utility model discloses a top schematic view shows;

[0026] Figure 6 The utility model discloses a side rear schematic view shows;

[0027] Figure 7 The utility model discloses a structure schematic view without cutter suction dredger shows.

[0028] In the drawing: 10, cutter suction dredger;20, lowering arm;111, starter;112, fixed wheel;113, fixed hoop;116, driving wheel;

[0029] 11, trash screen;12, support frame;15, support arm;16, float;17, fixed cable;18, cutter hole;19, steel pile hole. DETAILED DESCRIPTION

[0030] In order to make the technical personnel in the art better understand the technical scheme of the present application, the present application will be further described in detail below with reference to the drawings and the best mode. Based on the embodiments of the present application, all other embodiments obtained by the ordinary skilled in the art without creative labor are within the scope of protection of the present application.

[0031] In the description of the present application, it should be pointed out that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application, indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0032] In addition, it should be pointed out that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For the skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] Embodiment 1: As shown in the figure, the present application comprises a trash screen body located below the cutter suction dredger 10 and a lifting unit arranged between the trash screen body and the cutter suction dredger 10, the lifting unit comprises a plurality of lowering arms 20 slidingly connected around the cutter suction dredger 10 in the longitudinal direction, a driving assembly connected with the lowering arms 20, the lowering arms 20 are fixedly connected with the trash screen body, and the driving assembly can drive the trash screen body to move reciprocatingly along the longitudinal direction through the lowering arms 20. In this example, the length of the trash screen body is preferably but not limited to 2-3 times the length of the cutter suction dredger 10, and the width of the trash screen body is preferably but not limited to 1.5-2 times the width of the cutter suction dredger 10.

[0034] The driving assembly drives the lowering arms 20 to move reciprocatingly along the longitudinal direction through gear and rack engagement. The sidewall of the cutter suction dredger 10 is fixedly connected with a fixed hoop 113, and in this example, four fixed hoops 113 are arranged on the bow and stern of the cutter suction dredger 10 on both sides by welding, and each fixed hoop 113 corresponds to a set of lowering arms 20 and driving assemblies. The lowering arms 20 are arranged through the fixed hoop 113, the driving assembly comprises a starting machine 111 located on the deck of the cutter suction dredger 10, a fixed wheel 112 and a driving wheel 116 arranged on the starting machine 111, which act on both sides of the lowering arms 20 respectively, and one side of the lowering arms 20 is provided with an angular tooth structure for mutual engagement with the driving wheel 116.

[0035] Preferably, the fixed hoop 113 in this case is preferably but not limited to designed as a metal square block, a square through hole is arranged in the middle, which is used to pass through and limit the transverse movement of the lowering arm 20, which is arranged to fit into the lowering arm 20, so that the lowering arm 20 can move up and down, and will not sway left and right. Four fixed hoops 113 correspond to the positions close to the ship side, and one starting machine 111 is arranged on the ship deck respectively, a total of four starting machines 111, the starting machine 111 is a low-speed motor, which is used to drive the trash screen structure to lift and drop. One fixed wheel 112 and one driving wheel 116 are arranged on the starting machine 111 respectively, the fixed wheel 112 is a rubber driven wheel, which is used to transversely extrude and fix the lowering arm 20, the driving wheel 116 is a driving gear, which is engaged with the teeth arranged on the lowering arm 20, under the action of the starting machine motor driving the driving wheel 116, the lowering arm 20 is lifted and lowered, and then the whole trash screen device is lifted and lowered. In addition, the lowering arm 20 in this case is preferably but not limited to designed as a hollow metal rod with a rectangular cross section, one side of the metal rod is a smooth surface, and the other side is arranged with an angular tooth structure, which is used to engage with the driving wheel 116.

[0036] At the same time, the trash screen body includes a support frame 12 and a trash screen 11 connected in the support frame 12, the support frame 12 is made of metal material, which is used to fix the whole trash screen structure, a plurality of horizontal and vertical rods are arranged inside the support frame 12 in this case, the trash screen 11 is a nylon water-permeable cloth, which can permeate clear water and has a certain blocking effect on suspended particles in turbid water, the trash screen 11 and the support frame 12 are connected by binding belts. In addition, the bottom of the lowering arm 20 is fixedly connected with the support frame 12, and the top of the lowering arm 20 is fixedly connected with the support frame 12 around the four support arms 15. In this case, the four corners of the support frame 12 are provided with four support arms 15 by welding, the other end of the support arm 15 is connected with the top of the lowering arm 20 by welding, and the bottom of the lowering arm 20 is connected with the horizontal rod inside the support frame 12 by welding. The beneficial aspect of such arrangement is that the trash screen structure can be fixed firmly, so that the support frame 12 can be lifted and lowered synchronously with the lowering arm 20.

[0037] In addition, the middle part of the trash screen body is provided with a cutter hole 18 and a steel pile hole 19. The cutter hole 18 is a rectangular through hole, and the inside of the hole is not provided with the trash screen 11, which is arranged to allow the cutter to pass through the hole and be lowered to the bottom of the water for dredging operation, and the trash screen body will not affect the cutter construction. The steel pile hole 19 is two rectangular through holes, and the inside of the hole is not provided with the trash screen 11, which is arranged to allow two positioning steel piles on the cutter suction dredger to pass through the hole and be lowered to the bottom of the water for positioning operation, and the trash screen body will not affect the construction.

[0038] The support frame 12 is connected with the floating body 16 through the fixed cable 17 respectively, and the purpose of the arrangement is that when the trash screen structure is immersed in the water body, the position of the trash screen structure under the water can be determined by observing the position of the floating body on the water surface, so as to avoid collision accidents.

[0039] Embodiment 2: Based on the underwater trash screen device of the environmental protection cutter suction dredger disclosed in embodiment 1, the preferred construction method is as follows:

[0040] (I) Construction starts

[0041] Step S1: lifting the trash screen structure

[0042] Before the environmental protection cutter suction dredger sets sail, the four starting machines drive the four driving wheels to rotate synchronously, wherein the driving wheels on the side close to the cutter of the cutter suction dredger rotate in the same direction, and the two driving wheels on the side close to the steel pile of the cutter suction dredger rotate in the opposite direction. The four lowering arms are driven to lift, the support frame is driven to lift synchronously, and the whole trash screen structure device is lifted off the water surface.

[0043] Step S2: driving into the construction area

[0044] The environmental protection cutter suction dredger drives into the construction area and prepares to start dredging construction.

[0045] During the maneuvering and driving of the environmental protection cutter suction dredger on the water, the trash screen structure is placed above the water surface, which is beneficial in reducing the resistance caused by the trash screen structure during the driving of the ship.

[0046] Step S3: lowering the trash screen structure

[0047] After the environmental protection cutter suction dredger drives to the dredging construction area, the four starting machines drive the four driving wheels to rotate synchronously, wherein the driving wheels on the side close to the cutter of the cutter suction dredger rotate in the same direction, and the two driving wheels on the side close to the steel pile of the cutter suction dredger rotate in the opposite direction. The four lowering arms are driven to lower, the support frame is driven to lower synchronously, and the whole trash screen structure is immersed in the water body to an appropriate depth.

[0048] Step S4: lowering and positioning the steel pile and the cutter head

[0049] The movement of the cutter suction dredger in the construction area relies on the lowering and positioning of the steel pile. The two steel piles pass through the two steel pile holes and are lowered and inserted into the water bottom to position the ship body.

[0050] The cutter suction dredger lowers the cutter head in the construction area to carry out dredging construction, and the cutter head is lowered to the water bottom to start dredging operation.

[0051] Step S5: the environmental protection cutter suction dredger starts dredging

[0052] The environmental cutter suction dredger dredges the silt at the bottom of the river, lake or reservoir by rotating the cutter head.

[0053] The stirring of the cutter head in the bottom mud will stir up a large amount of suspended particles in the water, causing the bottom water body to be turbid. The turbid water body spreads upward and encounters the trash screen arranged on the support frame, which produces a downward blocking effect on the turbid water body, preventing the suspended particles from diffusing upward and reducing the speed of the turbid water body spreading upward, so that the shallow water body maintains good water quality.

[0054] (II) After construction

[0055] Step S1: retracting the steel pile and the cutter head

[0056] After the construction of the environmental cutter suction dredger is completed, the positioning steel pile is lifted, and the two steel piles on the cutter suction dredger pass through the two steel pile holes and are lifted above the water surface, so that the ship body can move freely on the water.

[0057] The environmental cutter suction dredger lifts the cutter head, which passes through the cutter hole and is lifted to the inside of the ship body, ending the dredging operation.

[0058] Step S2: lifting the trash screen structure and leaving the construction area

[0059] The four starting machines drive the four driving wheels to rotate synchronously, wherein the driving wheels near the cutter side of the cutter suction dredger rotate in the same direction, and the two driving wheels near the steel pile side of the cutter suction dredger rotate in the opposite direction. Drive the four lowering arms to lift upward, and the support frame is lifted synchronously, so that the entire trash screen structure is lifted out of the water body, and the environmental cutter suction dredger leaves the construction area.

[0060] Step S3: cleaning the trash screen structure

[0061] After the environmental cutter suction dredger enters the safe water area, the pollutants on the trash screen are cleaned, maintaining the water permeability of the trash screen while preventing the residual pollutants on the trash screen from causing secondary pollution to the water body when the trash screen is lowered again. The cleaned trash screen can be used again in the next dredging construction.

[0062] The utility model discloses can realize following environmental protection cutter suction dredger synchronous movement, and the cutter suction dredger drives into the construction area and can enter the construction area, drives off the construction area and withdraws, and the trash screen also removes, and moves with the source of pollutant generation. At the same time, the trash screen device is arranged in the lower part of the environmental protection cutter suction dredger, the position of the trash screen structure in the water body is adjusted through the lowering and lifting mechanism, the turbid liquid caused by the water body of the cutter suction dredger stirring is limited below a certain depth, prevents the deep turbid water body from spreading to the shallow water body, keeps the water body of relatively shallow depth clean, and the rate of suspended particulate matter spreading to the shallow water body is weakened. In addition, the turbid water body generated in the construction process of the environmental protection cutter suction dredger can also be limited to the deep water body below the trash screen structure, the suspended particulate matter in the water body can deposit to the bottom of the water body quickly, the suspended particulate matter precipitation time in the water body is shortened, and the water quality recovery speed of the water body in the construction area is accelerated.

[0063] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled person in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the utility model.

Claims

1. A river lake and reservoir environmental protection cutter suction dredger underwater trash screen device, characterized in that, The barrier body is located below the cutter suction dredger (10), and the lifting unit is arranged between the barrier body and the cutter suction dredger (10), The lifting unit comprises a plurality of lowering arms (20) connected to the cutter suction dredger (10) in the longitudinal direction, and a driving assembly connected to the lowering arms (20), the lowering arms (20) are fixedly connected to the barrier body, and the driving assembly drives the barrier body to move reciprocatingly in the longitudinal direction through the lowering arms (20).

2. The device according to claim 1, characterized in that, The driving assembly drives the lowering arms (20) to move reciprocatingly in the longitudinal direction through gear and rack engagement.

3. The device according to claim 2, characterized in that, The side wall of the cutter suction dredger (10) is fixedly connected with a fixing hoop (113), and the lowering arms (20) pass through the fixing hoop (113) and are arranged, The driving assembly comprises a starting machine (111) arranged on the deck of the cutter suction dredger (10) and a driving wheel (116) connected to the starting machine (111), and one side of the lowering arms (20) is provided with an angular tooth structure for meshing with the driving wheel (116).

4. The river lake reservoir environmental protection cutter suction dredger underwater trash screen device according to claim 3, characterized in that, The starting machine (111) is provided with a fixed wheel (112) and a driving wheel (116) respectively, and acts on both sides of the lowering arms (20).

5. The river lake reservoir environmental protection cutter suction dredger underwater trash screen device according to claim 4, characterized in that, Four fixing hoops (113) are fixedly connected to the bow and stern of the cutter suction dredger (10) respectively, and each fixing hoop (113) corresponds to a group of lowering arms (20) and driving assemblies.

6. The device according to any one of claims 1-5, characterized in that, The barrier body comprises a support frame (12) and a barrier net (11) connected to the support frame (12), The bottom of the lowering arms (20) is fixedly connected to the support frame (12), and the top of the lowering arms (20) is fixedly connected with support arms (15) around the support frame (12).

7. The river lake reservoir environmental protection cutter suction dredger underwater trash screen device according to claim 6, characterized in that, A plurality of horizontal rods and vertical rods are arranged inside the support frame (12), The barrier net (11) is a nylon water-permeable cloth, and the barrier net (11) and the support frame (12) are connected by a binding belt.

8. The device according to claim 6, characterized in that, The middle part of the barrier body is provided with a cutter hole (18) and a steel pile hole (19).

9. The device according to claim 8, characterized in that, The support frame (12) is connected with a floating body (16) around through a fixed cable (17).

10. The device according to claim 1, characterized in that, The length of the barrier body is 2-3 times the length of the cutter suction dredger (10), and the width of the barrier body is 1.5-2 times the width of the cutter suction dredger (10).

Images