Cofferdam filtering device for river construction

Abstract

The utility model discloses a river construction cofferdam filtering device which comprises a horizontal pipe penetrating through a cofferdam, and the upstream end of the horizontal pipe cofferdam is connected with a vertical pipe through an arc-shaped pipe. A hanging basket is detachably installed in the vertical pipe and provided with an annular supporting ring and a round bottom plate, a filter screen is installed between the inner ring side of the supporting ring and the edge side of the bottom plate, the filter screen is of a pipe body structure and is coaxially arranged with the vertical pipe, the supporting ring is supported on the opening side of the upper end of the vertical pipe, and a hanging device is fixed to the center of the bottom plate. The caliber of the hanging basket is smaller than the pipe diameter of the vertical pipe, the upstream water level corresponding to the cofferdam is higher than the downstream water level, water enters the hanging basket through an inner ring opening of a supporting ring corresponding to the hanging basket, the filtering net on the side wall of the hanging basket is used for filtering floating objects, and the water penetrates through the filtering net to sequentially flow through the arc-shaped pipe and the horizontal pipe and finally reaches the downstream water level of the cofferdam. The interception type filtration is completed.

Description

Technical Field

[0001] This utility model belongs to the technical field of water conservancy engineering equipment, and in particular relates to a cofferdam filtration device for river construction. Background Technology

[0002] A dam is a water-retaining structure that blocks the flow of water in rivers and canals to raise the water level or regulate the flow. It can form a reservoir, raising the water level, regulating runoff, and concentrating water head for purposes such as flood control, water supply, irrigation, hydroelectric power generation, and improving navigation. Dam construction is a large-scale and inconvenient undertaking, requiring a series of operations including excavation, concrete pouring, and pile driving.

[0003] To ensure effective treatment of construction wastewater and prevent it from entering downstream areas, three 100-meter-long cofferdams were constructed downstream of the river to filter the water layer by layer, minimizing the scope of pollution. The cofferdams also effectively block upstream construction wastewater. This invention incorporates filtration devices on the cofferdams, which intercept large-diameter impurities as water flows through, typically including various floating debris left over from upstream construction, such as plastic bags and plastic formwork. Utility Model Content

[0004] The purpose of this utility model is to provide a cofferdam filtration device for river construction. A cofferdam is installed downstream, and the filtration device of the cofferdam filters floating objects in the water, thereby reducing water pollution caused by construction downstream.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] A cofferdam filtration device for river construction includes a horizontal pipe passing through the cofferdam, the upstream end of which is connected to a vertical pipe via an arc-shaped pipe.

[0007] A suspended basket is detachably installed inside the vertical pipe. The suspended basket has an annular support ring and a circular base plate. A filter screen is installed between the inner ring side of the support ring and the side of the base plate. The filter screen has a tubular structure and is coaxially arranged with the vertical pipe. The support ring is supported on the upper opening side of the vertical pipe. A suspension device is fixed in the center of the base plate.

[0008] Furthermore, the suspension device is a rod, which is vertically fixed to the center of the base plate.

[0009] A positioning hole is provided in the center of the lower side of the base plate. A positioning rod is fixed to the arc-shaped tube. The lower end of the positioning rod is fixed to the inner wall of the arc-shaped tube, and the upper end is inserted into the positioning hole for positioning the base plate.

[0010] A support plate for supporting the base plate is installed in the arc-shaped tube. The support plate is fixed to the positioning rod, which is detachably fixed to the arc-shaped tube. The lower end of the positioning rod is a threaded end, and a positioning sleeve for threaded connection of the positioning rod is welded and fixed to the inner wall of the arc-shaped tube.

[0011] Furthermore, multiple reinforcing rods are evenly provided on the inner ring side of the support ring and the side of the base plate, with the upper end of the reinforcing rod fixed to the support ring and the lower end fixed to the base plate.

[0012] The present invention has the following beneficial effects: the diameter of the suspended basket is smaller than the diameter of the vertical pipe, the upstream water level corresponding to the cofferdam is higher than the downstream water level, the water enters the interior of the suspended basket through the inner ring of the support ring corresponding to the suspended basket, and is filtered by the filter screen on the side wall of the suspended basket to filter floating objects, while the water passes through the filter screen and flows through the arc-shaped pipe and the horizontal pipe in sequence, and finally reaches the downstream water level of the cofferdam, thus completing the interception filtration. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0014] Figure 1 : Schematic diagram of the disassembly structure of the suspended basket of this utility model.

[0015] Figure 2 : Schematic diagram of the suspended basket structure of this utility model.

[0016] Figure 3 : A schematic diagram of the vertical tube with a cross-section of this utility model.

[0017] Figure 4 : Schematic diagram of the overall structure of this utility model.

[0018] Figure 5 : Schematic diagram of the overall application structure of this utility model.

[0019] The components represented by each number in the attached diagram are listed below: Horizontal pipe 1, Arc-shaped pipe 3, Vertical pipe 2, Suspended basket 4, Support ring 41, Base plate 42, Filter screen 43, Rod body 45, Positioning hole 44, Positioning rod 5, Support plate 51, Positioning sleeve 31, Reinforcing rod 46. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] like Figures 1-5As shown: a cofferdam filtration device for river construction includes a horizontal pipe 1 passing through the cofferdam. The upstream end of the horizontal pipe 1 is connected to a vertical pipe 2 via an arc-shaped pipe 3. The horizontal pipe is a straight pipe structure with a horizontal axis. It is embedded in the cofferdam during installation. The vertical pipe and the horizontal pipe are connected by an arc-shaped pipe. All connections are flange connections and are fixed with bolts so that the upper end of the vertical pipe faces upward, which is convenient for installing the suspended basket.

[0022] A suspended basket 4 is detachably installed inside the vertical pipe 2. The suspended basket 4 has an annular support ring 41 and a circular base plate 42. A filter screen 43 is installed between the inner ring side of the support ring 41 and the side of the base plate 42. The filter screen 43 is a tubular structure and is coaxially arranged with the vertical pipe 2. The support ring 41 is supported on the upper opening side of the vertical pipe 2, and a suspension device is fixed in the center of the base plate 42. The diameter of the suspended basket is smaller than the diameter of the vertical pipe. The upstream water level corresponding to the cofferdam is higher than the downstream water level. Water enters the suspended basket through the inner ring of the support ring and is filtered by the filter screen on the side wall of the suspended basket to remove floating debris. The water then flows through the filter screen, passing through the arc-shaped pipe and the horizontal pipe in sequence, and finally reaches the downstream water level of the cofferdam, completing the interception filtration.

[0023] After the basket has accumulated enough impurities, it needs to be cleaned to prevent it from obstructing the filter screen and affecting water flow. The basket is removed from the top of the vertical pipe through the suspension device installed on it, and the impurities in the basket are cleaned to ensure a high-efficiency filtration effect.

[0024] like Figure 2 As shown: The suspension device is a rod 45, which is vertically fixed to the center of the base plate 42. It is used by people on the cofferdam to easily remove the basket via the rod.

[0025] like Figure 3 As shown: A positioning hole 44 is provided in the center of the lower side of the base plate 42. A positioning rod 5 is fixed to the arc-shaped tube 3. The lower end of the positioning rod 5 is fixed to the inner wall of the arc-shaped tube 3, and the upper end is inserted into the positioning hole 44 for positioning the base plate 42. This is used to position the installation position of the suspended platform and ensure that the distance between the side wall of the suspended platform and the inner wall of the vertical tube is consistent. A support plate 51 for supporting the base plate 42 is installed in the arc-shaped tube 3. The support plate 51 is fixed to the positioning rod 5. The positioning rod 5 is detachably fixed to the arc-shaped tube 3. The lower end of the positioning rod 5 is threaded. A positioning sleeve 31 for threaded connection of the positioning rod 5 is welded and fixed to the inner wall of the arc-shaped tube 3. The support plate is used for bottom support of the suspended platform and improves the support performance of the base plate of the suspended platform.

[0026] like Figure 2 As shown: Multiple reinforcing rods 46 are evenly arranged on the inner ring side of the support ring 41 and the side of the base plate 42. The upper end of the reinforcing rod 46 is fixed to the support ring 41, and the lower end is fixed to the base plate 42. This is used to improve the strength of the filter screen and prevent the filter screen from being deformed due to the accumulation of impurities.

[0027] These embodiments are selected and specifically described in this specification in order to better explain the principles and practical applications of this utility model, so that those skilled in the art can better understand and utilize this utility model.

Claims

1. A river channel construction cofferdam filtering device, characterized in that: it comprises a horizontal pipe (1) passing through the cofferdam, the upstream end of the horizontal pipe (1) is connected with a vertical pipe (2) through an arc-shaped pipe (3); a hanging basket (4) is detachably installed inside the vertical pipe (2), the hanging basket (4) has a ring-shaped support ring (41) and a circular bottom plate (42), a filter screen (43) is installed between the inner ring side of the support ring (41) and the edge side of the bottom plate (42), the filter screen (43) is in a pipe body structure and coaxially arranged with the vertical pipe (2), the support ring (41) is supported on the upper opening side of the vertical pipe (2), and a suspension device is fixedly arranged on the center of the bottom plate (42). The suspension device is a rod body (45) which is vertically fixed on the center of the bottom plate (42). A positioning hole (44) is formed in the lower side of the bottom plate (42), the arc-shaped pipe (3) is fixed with a positioning rod (5), the lower end of the positioning rod (5) is fixed on the inner side wall of the arc-shaped pipe (3), and the upper end of the positioning rod (5) is inserted into the positioning hole (44) for positioning the bottom plate (42).

2. The filter device according to claim 1, wherein: A support plate (51) for supporting the bottom plate (42) is installed in the arc-shaped pipe (3), the support plate (51) is fixed on the positioning rod (5), the positioning rod (5) is detachably fixed on the arc-shaped pipe (3), the lower end of the positioning rod (5) is a threaded end, and the inner side wall of the arc-shaped pipe (3) is welded with a positioning sleeve (31) for threadedly sleeving the positioning rod (5).

3. The filter device according to claim 2, wherein: A plurality of reinforcing rods (46) are uniformly arranged on the inner ring side of the support ring (41) and the edge side of the bottom plate (42), the upper end of the reinforcing rod (46) is fixed on the support ring (41), and the lower end of the reinforcing rod (46) is fixed on the bottom plate (42).

4. The filter device according to claim 3, wherein: ​ 5. The filter device according to claim 1, wherein: ​

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