River and lake dredging water depth self-adaptive one-way flow trash holding screen

Abstract

The utility model relates to a river and lake dredging water depth self-adaptive one-way flow trash holding screen which comprises two anchor rods, a cross rod arranged between the top ends of the two anchor rods and a curtain type trash holding screen arranged between the two anchor rods, conical heads are arranged at the bottom ends of the anchor rods, and the curtain type trash holding screen comprises an upper end plate, a lower end plate and a curtain located between the upper end plate and the lower end plate. Multiple round holes are formed in the two ends of the curtain, the anchor rods penetrate through the round holes, a one-way flow guide door is arranged on the upper portion of the curtain, and a floating body is arranged on the upper end plate. The river and lake dredging water depth self-adaptive one-way flow trash holding screen is high in strength and good in waverider and stability, the organ stretching type curtain body is easy to stretch out and draw back and can stretch out and draw back along with the change of the water depth, and the effect of reducing wind waves is achieved; water flow in the non-dredging area can penetrate through the curtain body to supplement water in the dredging area, the water in the non-dredging area cannot easily enter the dredging area, and disturbance of the water in the non-dredging area is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water environment and water ecology restoration, in particular to a one-way flow pollution-blocking screen for river and lake dredging with adaptive water depth. Background Art

[0002] With the rapid development of my country's economic construction and the increasing requirements for environmental protection, the number of projects for water environment management in rivers and lakes is gradually increasing. An important step in the management is to transfer the polluted sediment at the bottom of rivers and lakes to special treatment sites for treatment through hydraulic dredging and transportation, so as to achieve the purpose of water environment environmental protection.

[0003] Dredging construction causes the dredging and stirring of silt at the bottom of rivers and lakes, which will cause the underwater sand and mud to spread, and the silt to disperse at the bottom of the water body, thus affecting the water quality and causing pollution to the ocean, rivers and lakes. It has a great impact on the marine environment and the normal production of fisheries. In order to minimize the impact of construction on the environment, pollution screens are generally used for anti-pollution treatment.

[0004] The main body of the traditional pollution screen is a permeable geotextile. Although it has a certain pollution filtering effect on the water body, there is still water exchange between the dredging area and the non-dredging area, and some pollutants can pass through the geotextile to pollute the water body in the non-dredging area. If an impermeable pollution screen is used, the water level inside and outside the pollution screen may be unbalanced due to the lowering of the water level during the dredging process in the dredging area. Due to the large support displacement caused by waves and wind loads, the pollution screen will be displaced and the pollution blocking effect will be weakened; at the same time, during the dredging and transportation of silt in the ecological dredging area, the total amount of water will be reduced and the water level will be lowered. Under the action of gravity, the surrounding non-dredging area will exchange water with it. During the water exchange process, the dirty water generated in the dredging area during the dredging process will flow to the non-dredging area, resulting in secondary pollution. If a rigid impermeable embankment structure is used, it is limited by the natural conditions of the project location, the source of materials, the use requirements and the construction conditions, and it is also necessary to comprehensively consider technical and economic factors. The construction period is long and the cost is high. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a one-way flow pollution-blocking screen for river and lake dredging with adaptive water depth. The screen has a simple structure, is safe and reliable, is easy to maintain and operate, is convenient to disassemble, assemble and transport, the curtain can be recycled and reused, and can provide single water replenishment to the dredging area.

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

[0007] A one-way flow trash screen for dredging rivers and lakes with adaptive water depth, comprising two anchor rods, a cross bar arranged between the top ends of the two anchor rods, and a curtain-type trash screen arranged between the two anchor rods, wherein a cone head is arranged at the bottom end of the anchor rod, and the curtain-type trash screen comprises an upper end plate, a lower end plate, and a curtain located between the upper end plate and the lower end plate, wherein a plurality of circular holes are arranged at both ends of the curtain, the anchor rods are arranged to pass through the circular holes, a one-way guide door is arranged on the upper part of the curtain, and a floating body is arranged on the upper end plate.

[0008] According to the above technical solution, preferably, the upper end plate includes a horizontal plate A and a vertical plate A, the vertical plate A is fixedly connected to the upper end of the curtain, and the lower end plate includes a horizontal plate B and a vertical plate B, the horizontal plate B is fixedly connected to the anchor rod, and the vertical plate B is fixedly connected to the lower end of the curtain.

[0009] According to the above technical solution, preferably, a counterweight is provided on the lower end plate.

[0010] According to the above technical solution, preferably, the curtain is made of rubber material, a plurality of transverse folds are evenly arranged on the curtain, and hole guards are arranged at the circular holes at both ends of the curtain.

[0011] According to the above technical solution, preferably, the anchor rod and the cross rod are detachably connected via a joint A.

[0012] According to the above technical solution, preferably, both ends of the cross bar are detachably connected with connectors B.

[0013] According to the above technical solution, preferably, the one-way guide door includes a water permeable hole opened on the upper part of the curtain and a hole cover connected to the upper part of the water permeable hole.

[0014] According to the above technical solution, preferably, a sealing ring is provided on the hole wall of the water permeable hole, and the hole cover is sealed to one side of the water permeable hole by the sealing ring under normal conditions.

[0015] The beneficial effects of the utility model are:

[0016] The utility model has the advantages of simple structure, safety and reliability, easy maintenance and operation, convenient disassembly, assembly and transportation, and all parts can be recycled and reused; the river and lake dredging water depth adaptive unidirectional flow pollution screen of the utility model has high strength, good wave-riding performance and stability, and the accordion stretching curtain body is easy to retract and expand and can retract with the change of water depth; the utility model can play a role in reducing wind and waves, create a relatively isolated water area, effectively prevent polluted water from entering the non-dredging area water area, and weaken the wind and wave intensity to a certain extent; the utility model can freely combine multiple monomers to form a longer pollution screen curtain; the utility model adopts unidirectional flow technology, the water flow in the non-dredging area can supplement the water in the dredging area through the curtain body, and the water in the non-dredging area is not easy to pass into the dredging area, thereby reducing the disturbance of the water in the non-dredging area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional schematic diagram of one side of the non-dredging area of ​​the utility model is shown.

[0018] Figure 2 A three-dimensional schematic diagram of one side of the dredging area of ​​the utility model is shown.

[0019] Figure 3 Shown is a side view of the utility model.

[0020] Figure 4 A three-dimensional schematic diagram of one side of the non-dredging area after the utility model is assembled is shown.

[0021] Figure 5 A three-dimensional schematic diagram of one side of the dredging area after the utility model is assembled is shown.

[0022] In the figure: 11, horizontal bar; 12, joint A; 13, joint B; 15, anchor rod; 16, cone head; 21, horizontal plate A; 22, vertical plate A; 23, vertical plate B; 24, horizontal plate B; 31, round hole; 32, hole guard ring; 33, curtain; 35, fold; 61, counterweight; 62, float; 81, hole cover; 82, sealing ring; 83, water-permeable hole. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and the best embodiment. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the utility model.

[0024] In the description of the utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the utility model.

[0025] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Embodiment 1: As shown in the figure, the utility model comprises two anchor rods 15, a cross bar 11 arranged between the top ends of the two anchor rods 15, and a curtain-type trash screen arranged between the two anchor rods 15. The bottom end of the anchor rod 15 is provided with a cone head 16. In this example, the bottom of the anchor rod 15 is connected to the cone head 16 by welding. The purpose of such arrangement is to facilitate the insertion of the anchor rod 15 into the underwater soil to fix the entire trash screen. The curtain-type trash screen comprises an upper end plate, a lower end plate, and a curtain 33 located between the upper end plate and the lower end plate. The two ends of the curtain 33 are provided with a plurality of circular holes 31. The anchor rod 15 is arranged to pass through the circular holes 31. The upper part of the curtain 33 is provided with a one-way guide gate. The one-way guide gate can be a one-way valve or other structure with one-way permeable fluid. The purpose of such arrangement is to allow clean water in the non-drainage area to flow to the drainage area, replenish clean water in the drainage area, and prevent turbid water in the drainage area from flowing back into the drainage area. The upper end plate is provided with a float 62. In this example, the float 62 is preferably made of hard foam. The upper end plate is connected to the float 62 by bonding to provide buoyancy for the curtain body. The purpose of this arrangement is to ensure that the top of the curtain body is always flush with the top of the water body in the dredging area to prevent overflow of the water body in the dredging area. When the water level in the non-dredging area is higher than that in the dredging area, water can flow from the top of the upper end plate to the dredging area to replenish it and ensure the water level for dredging construction.

[0027] Embodiment 2: Based on the solution disclosed in Embodiment 1, preferably, the upper end plate includes a horizontal plate A21 and a vertical plate A22, and the vertical plate A22 is fixedly connected to the upper end of the curtain 33. The lower end plate includes a horizontal plate B24 and a vertical plate B23, and the horizontal plate B24 is fixedly connected to the anchor rod 15, and the vertical plate B23 is fixedly connected to the lower end of the curtain 33. In addition, a counterweight 61 is provided on the lower end plate.

[0028] Specifically, in this example, the material of the horizontal plate A21 is PVC, and through holes are set at both ends of the horizontal plate A21. The purpose of this setting is that the anchor rod 15 can slide freely up and down through the through holes. The horizontal plate A21 is close to the non-dredging area. The vertical plate A22 is set by bonding. The bottom of the vertical plate A22 is connected to the curtain 33 by bonding. The vertical plate A22 is also made of PVC material. The purpose of this setting is that when the curtain 33 is folded, it will not touch the counterweight 61. The top of the vertical plate B23 is connected to the curtain 33 by bonding, and the bottom is connected to the horizontal plate B24 by bonding. The counterweight 61 is an iron block, which is connected to the top of the horizontal plate B24 by binding, providing a counterweight 61 for the curtain body, so that the bottom of the curtain body fits the bottom of the water, preventing water exchange between the dredging area and the non-dredging area.

[0029] Embodiment 3: Based on the scheme disclosed in Embodiment 2, preferably, the curtain 33 is made of rubber, and a plurality of transverse folds 35 are evenly arranged on the curtain 33. The purpose of such arrangement is that when the water level in the dredging area changes, the curtain 33 can adjust the height of the curtain body by contraction and expansion according to the spacing of the folds 35. There are circular holes 31 at the edges of both sides of the curtain 33, and the circular holes 31 are circular through holes. The purpose of such arrangement is to pass the anchor rod 15. Hole guards 32 are arranged at the circular holes 31 at both ends of the curtain 33. In this example, the hole guards 32 are arranged on the circular holes 31 by bonding, and the hole guards 32 are made of metal. The purpose of such arrangement is that the curtain 33 can slide freely up and down the anchor rod 15 through the circular holes 31 without friction and damage to the curtain 33.

[0030] Embodiment 4: Based on the scheme disclosed in Embodiment 1, preferably, the anchor rod 15 is detachably connected to the cross bar 11 through the joint A12. In this example, the top of the anchor rod 15 is provided with an external thread for connecting the joint A12, and the top of the joint A12 is connected to the cross bar 11 by welding. The two ends of the cross bar 11 can be detachably connected with joints B13, and in this example, both sides of the joint B13 are provided with internal threads for connecting the cross bar 11. Multiple pollution screens can be combined into a longer anti-pollution screen curtain through the connection between the cross bars 11. The anchor rod 15, the joint A12, and the joint B13 are all made of DN50 anti-rust steel pipes, and the cone head 16 is made of anti-rust metal.

[0031] Embodiment 5: Based on the scheme disclosed in Embodiment 1, preferably, the one-way guide door includes a water permeable hole opened on the upper part of the curtain 33 and a hole cover 81 connected to the top of the water permeable hole, and a sealing ring 82 is provided on the hole wall of the water permeable hole. The hole cover 81 is sealed on one side of the water permeable hole by the sealing ring 82 under normal conditions.

[0032] A water-permeable hole is arranged at the upper part of the curtain 33. The water-permeable hole is a circular through hole. The purpose of such arrangement is to allow the upper water body of the non-drainage area to flow to the dredging area through the water-permeable hole. The flow of the surface water body reduces the disturbance of the bottom silt and avoids the water flow causing the bottom water body to be polluted. A sealing ring 82 is arranged on the hole wall of the water-permeable hole. The material is a rubber material. When the water level of the dredging area and the non-drainage area is the same, when it is fitted with the hole cover 81, it is sealed and impermeable, so that the water body of the dredging area and the non-drainage area does not exchange. The hole cover 81 is made of rubber, and the upper part is connected to the sealing ring 82 by bonding. The hole cover 81 can make the water-permeable hole impermeable under normal circumstances, but under the action of water pressure, it can be opened obliquely upward toward the dredging area, so that clean water in the non-dredging area can flow to the dredging area through the water-permeable hole, but it is difficult for the water in the dredging area to flow to the non-dredging area through the water-permeable hole. The purpose of this setting is to use the water in the non-dredging area to replenish the water in the dredging area, but it is difficult for the dirty water in the dredging area to enter the non-dredging area to cause water pollution.

[0033] The utility model sets a fixed frame between the water body in the dredging area and the water body in the non-dredging area, hangs a curtain on the fixed frame, separates the water body in the dredging area from the water body in the non-dredging area, and limits the water exchange between the two, so as to ensure that the water quality of the water body in the non-dredging area is not affected by the turbid water body in the dredging area. At the same time, a one-way guide gate is set on the curtain body, so that when the water body in the dredging area is reduced and the water level is lowered, the water body in the non-dredging area can be replenished with water, so as to ensure that the water level in the dredging area meets the construction requirements and prevent the turbid water in the dredging area from flowing to the water body in the non-dredging area. A floating body is set on the top of the curtain body on one side of the water body in the dredging area, so that the curtain body can be stretched and compressed as the water level in the dredging area changes, and at the same time play a wave-breaking role.

[0034] The preferred implementation steps and principles of the adaptive one-way flow trash screen disclosed in the utility model are as follows:

[0035] Step 1: Install fixed anchor rods 15 at appropriate locations; insert the pointed end into the soil at the bottom of the water body, and insert one or more anchor rods 15 at appropriate intervals, with the interval between every two anchor rods 15 being the same as the interval between the circular holes 31 set on the curtain. A small piling boat can be used for construction, and the anchor rods can be driven into the bottom of the water for support and fixation.

[0036] Step 2: Cut the curtain 33 to an appropriate length according to the water depth, and connect the top and bottom of the curtain 33 to the vertical plate A22 and the vertical plate B23 respectively by bonding, and then hang the curtain 33 from top to bottom, so that the anchor rod 15 passes through the through hole set on the horizontal plate A21, the circular hole 31 set on the curtain 33, and penetrates the horizontal plate B24 in sequence, so that the bottom of the horizontal plate B24 fits with the bottom surface of the water.

[0037] Step 3: After inserting the anchor rod 15, connect the cross bar 11 through the joint A12. Both the cross bar 11 and the anchor rod 15 are made of DN50 rust-proof steel pipe. If multiple curtains 33 monomers need to be set up for combination, the joints B13 at both ends of the cross bar 11 can be used to connect the cross bars 11 on other curtains 33 to form a longer anti-fouling screen curtain.

[0038] Step 4: When the dredging operation begins in the dredging area, as the silt and mud in the dredging area are moved out of the water body, the total amount of water in the dredging area will decrease. Under the action of gravity pressure, the water in the non-dredging area will flow to the dredging area through the permeable holes in the one-way guide gate, ensuring the water level in the non-dredging area and the draft depth of the dredging vessels in the dredging area.

[0039] Step 5: When high-power hydraulic dredging is adopted in the dredging area, such as a high-power dredge suction pump, the water in the dredging area will be transported out of the dredging area in a large scale, which will cause a large water level change in the dredging area. The flow rate of the permeable holes in the one-way guide gate is obviously unable to meet the water replenishment demand of the dredging area. The water level in the dredging area is greatly reduced. At this time, the reduced water level of dredging will drive the floating body 62 to drop along with the water level in the dredging area. When the floating body 62 drops, the part of the top of the liquid surface of the water body in the non-dredging area that is higher than the horizontal plate A21 will form a large flow of water. The water on the surface of the water body in the non-dredging area will flow to the dredging area through the top of the horizontal plate A21, so that the water body in the non-dredging area is kept level with the liquid surface of the water body in the dredging area, thereby maximizing the water level height of the water body in the dredging area and the water level for dredging construction, while preventing the dirty water in the dredging area from flowing to the water body in the non-dredging area to cause secondary pollution.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A one-way flow pollution screen with adaptive water depth for river and lake dredging. It is characterized in that The utility model comprises two anchor rods, a cross rod arranged between the top ends of the two anchor rods and a curtain-type trash screen arranged between the two anchor rods, wherein a cone head is arranged at the bottom end of the anchor rod, and the curtain-type trash screen comprises an upper end plate, a lower end plate and a curtain located between the upper end plate and the lower end plate, wherein a plurality of circular holes are arranged at both ends of the curtain, the anchor rods are arranged through the circular holes, a one-way guide door is arranged on the upper part of the curtain, and a floating body is arranged on the upper end plate.

2. According to claim 1, a one-way flow pollution screen for river and lake dredging with adaptive water depth, It is characterized in that The upper end plate includes a horizontal plate A and a vertical plate A, and the vertical plate A is fixedly connected to the upper end of the curtain.

3. According to claim 1, a one-way flow pollution screen for river and lake dredging with adaptive water depth, It is characterized in that The lower end plate includes a horizontal plate B and a vertical plate B. The horizontal plate B is fixedly connected to the anchor rod, and the vertical plate B is fixedly connected to the lower end of the curtain.

4. The one-way flow pollution screen for river and lake dredging with water depth self-adaptation according to any one of claims 1 to 3, It is characterized in that A counterweight is arranged on the lower end plate.

5. According to claim 1, a one-way flow pollution screen for river and lake dredging with adaptive water depth, It is characterized in that The curtain is made of rubber material, and a plurality of transverse folds are evenly arranged on the curtain. Hole guards are arranged at the circular holes at both ends of the curtain.

6. The one-way flow pollution screen for river and lake dredging with adaptive water depth according to any one of claims 1 to 3 and 5, It is characterized in that The anchor rod and the cross rod are detachably connected via a joint A.

7. According to claim 6, a one-way flow pollution screen for river and lake dredging with adaptive water depth, It is characterized in that The two ends of the cross bar are respectively detachably connected with joints B.

8. According to claim 1, a one-way flow pollution screen for river and lake dredging with adaptive water depth, It is characterized in that The one-way flow guide door comprises a water permeable hole opened on the upper part of the curtain and a hole cover connected to the upper part of the water permeable hole.

9. According to claim 8, a one-way flow pollution screen for river and lake dredging with adaptive water depth, It is characterized in that A sealing ring is arranged on the hole wall of the water-permeable hole, and the hole cover is sealed on one side of the water-permeable hole through the sealing ring under normal conditions.

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