CN206706712U - A kind of split type net cage for intercepting floating object - Google Patents

Abstract

A split-type net cage for intercepting floating objects, including nets, the nets are made into a three-sided net structure through a supporting frame, deflectors are arranged inside the net structure, and diversion connecting net plates are arranged on both sides of the front end of the net structure, and the guides The flow connection mesh plate is close to the inner wall of the channel. The utility model provides a split-type net cage for intercepting floating objects, which not only prevents floating objects from spreading through the three-sided mesh structure, but also has the characteristics of "blocking but not dead", which will not block the river canal and keep the canal basically unblocked , has important practical significance for the governance of floating objects in our country.

Description

A split net cage for intercepting floating objects

technical field

The utility model relates to the field of river course garbage cleaning, in particular to a split net cage for intercepting floating objects in a water diversion channel of a power station.

Background technique

The current measures to control floating objects can be summarized into the following categories.

1. Block floating: that is to set up blocking floating row at the appropriate position of the diversion channel, which is the first line of defense to intercept floating objects. In calm waters, fences are used to intercept floating objects to prevent floating objects from entering the upstream approach channel. The trash rack installed at the water inlet of the power station is the last line of defense. After the trash rack intercepts the floating debris, it is cleaned by the dam crest cleaning machine;

2. Float discharge: use the hub to drain the building to discharge floating objects. The overflow type power station uses the overflow weir to drain the drift during the flood season, and the non-overflow power station sets the drift hole near the powerhouse to discharge the float. Some projects directly open the floodgates to discharge drifts. In recent years, some projects have adopted combined gates with tongue flaps to discharge drifts in order to reduce the amount of drifting water;

3. Drift cleaning: that is to directly salvage floating objects by means of machinery and manual work. In order to clean up the floating debris attached to the trash rack in time, the project must be equipped with a suitable cleaning machine. When a large amount of floating debris accumulates, it is necessary to use manpower or boats for emergency cleaning.

However, judging from the current situation, the above anti-drifting measures still need to be developed and improved in actual operation, mainly including the following problems:

1. Blocking and discharging floats cause floating objects to gather, and the drift guiding effect is not obvious. After the floating objects gather, they sink naturally, and they will also block the trash rack under the action of drainage; the accumulated floating objects squeeze the floating block under the action of drainage, wind, etc., which may damage the floating block; Under the action of other factors, the floating objects are easy to cross the floating block; cleaning up the floating objects before the floating block will cause the floating objects to leak.

2. Most of the floating objects in rivers occur during the rain and flood period. Due to the limitation of various factors such as water flow, climate, and night, simple manual cleaning is difficult to maintain long-term and stable drift control effects, and there are also hidden dangers. The cleaning before the trash rack on the crest of the dam is limited by various conditions such as the site and cleaning capacity, and the cleaning and drifting capacity is insufficient.

3. The migration and accumulation forms of floating objects are related to the operating conditions of the project. The location where the floating objects gather in the diversion channel in front of the power station changes frequently, and the direct attraction of floating objects by the drainage of fixed buildings is limited. The operation of the drift hole is affected by the water level in front of the dam, and the drift efficiency is lower after the orifice is submerged.

Contents of the invention

The technical problem to be solved by the utility model is to provide a split-type net cage for intercepting floating objects, which is easy to install and easy to operate, can greatly improve engineering efficiency and improve the water surface environment.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A split-type net cage for intercepting floating objects, including a net, the net is formed into a three-sided mesh interception structure through a frame, a deflector is arranged inside the three-sided mesh interception structure, and diversion connections are provided on both sides of the front end of the three-sided mesh interception structure The mesh plate, the diversion connection mesh plate is close to the inner wall of the river channel.

The mesh of the blocking net is 5 mesh/cm ² .

The included angle between the deflector and the blocking plane is 45 degrees to 60 degrees.

The three-sided net-like intercepting structure is formed by connecting multiple branch sections in series, each branch section is provided with a chute, and baffle plates are selectively inserted into the chute.

The three-sided mesh intercepting structure is arranged in multiple channels.

The utility model is a split-type cage for intercepting floating objects, which has the following technical effects:

1) Since the three sides of the net cage can pass through the water, after the net cage is blocked by the accumulation of floating objects, a water permeable area and a seepage area can still be formed, and the water flow can still flow through the water seepage area and the water seepage area, which has the characteristics of "blocking but not dead" .

2) The deflector can make the floating matter accumulate from the inside to the outside as much as possible, so as to increase the service life of the cage. This is mainly because the deflector in the net cage plays a role in regulating the water flow, which makes the water flow more concentrated in the mainstream direction of the center line of the net cage, and the floating objects drift into the net cage along the center line under the action of the concentrated water flow, reducing the net flow. The blockage of the side wall of the cage, and when the shear force of the small vortex generated between the deflectors is greater than the pressure generated by the lateral water flow, the floating objects will be separated from the side wall of the cage and move backward with the water flow.

3) Set up multiple net cages in the river to intercept floating objects, and the cages can be cleaned in time and in sections, so that it can always be ensured that there are net cages intercepting floating objects in the channel, so that the floating objects will not spread with the water flow Phenomenon, while reducing the workload of cleaning, to overcome the difficulty of cleaning and other shortcomings.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Fig. 1 is the schematic diagram of the utility model.

Fig. 2 is a top view layout diagram of the utility model.

Fig. 3 is a front layout view of the utility model.

Fig. 4 is a top view (first type) of the utility model for intercepting floating objects.

Fig. 5 is a front view (first type) of the utility model for intercepting floating objects.

Fig. 6 is a top view of the utility model for intercepting floating objects (the second type).

Fig. 7 is a front view of the utility model for intercepting floating objects (the second type).

In the figure: block 1, frame 2, deflector 3, diversion connection net plate 4, baffle 5, horizontal plane 6, and trash blocking area 7.

detailed description

As shown in Figure 1, a kind of split-type net cage for intercepting floating objects includes a net block 1, and the net net 1 is made into a net cage body with a three-sided mesh interception structure through a frame 2, and the three-sided mesh interception structure is a cuboid structure, and the bottom, left and right The two sides are metal nets, on which a plurality of transverse support plates are fixed along the length direction of the cage body. In order to facilitate the lifting and removal of slag in the later stage, the cage body can be made into two sections at the front and back, and the two sections are connected in series and put into the ditch. Each branch rear end slides and is provided with baffle plate 5, and when there are too many floating objects in the rear section, baffle plate 5 can be inserted in the chute of the front branch section, the front section can realize interception, and the rear section realizes lifting and cleaning. Because the channel is long, in order to clean the net cages in time and by section, multiple net cage bodies can be set in the channel, so that it can always be guaranteed that there are net cages in the channel to intercept the floating objects. In addition, there are deflectors 3 mirror-symmetrically arranged in the mesh structure, and diversion connecting mesh panels 4 are arranged on both sides of the front end of the mesh structure, and the diversion connecting mesh panels 4 are close to the inner wall of the channel.

As shown in Figure 2-3, the length of the cage is determined according to the channel. Usually, a split cage is arranged, and the total length is 15-20m. The ratio of the cage width to the river width is (0.8~0.9):1, and the height of the cage is generally higher than the water depth. The ratio of the blocking area of the cage to the flow area of the sluice hole is (7~20): 1, and it is generally appropriate not to affect the flow capacity. The aperture of the screen 1 for intercepting floating objects is generally 5 mesh/cm ² . A transverse metal plate support is added on the length direction of the net cage, which is fixed on the frame 2 with screws to prevent the net cage from being deformed due to bearing the carrier. The width of the connecting section in front of the cage is 1.4 to 1.5 times the distance between the outside of the cage and the channel, and the height is consistent with the height of the cage. The opening angle is generally about 45°, and the front section of the connecting section is close to the inner wall of the channel. The height and width of movable baffle are all consistent with the height and width of cage. Install 4 cuboid metal deflectors 3 equidistantly on both sides of the net cage, arranged longitudinally with the cage, with an included angle of 120 degrees with the blocking plane, and the ratio of the width of the deflectors to the width of the channel is 3.5-4. The spacing of the deflectors should be as far as possible at the end of the impact of the previous deflector on the water flow, and then the adjacent rear deflector should be installed.

Example 1:

As shown in Figure 4-7, the irrigation flow rate of a certain project is 0.9m ³ /s, the canal depth is 1.72m, the water depth in the canal is 1.22m, the bottom width is 4.5m, the side slope is 1:2, and the flow velocity is 0.14m/s . According to the research results of the experiment, the mesh aperture of the cage is 5 mesh/cm ² , and the height of the cage should be at least within the range of 1.22-1.72m. The parameters of the cage are determined according to the site conditions. 15m, the same width as the bottom of the canal. In addition, the net cage can be divided into several sections along the length direction of the net cage during application, and horizontal support can be added at the joints respectively, so as to prevent longitudinal deformation of the net cage, and can also be carried out in sections during cleaning. Before the entrance of the net cage, there is also a diversion connecting net plate, so that the water flow can enter the net cage smoothly, and prevent the floating matter from diffusing from the outside of the net cage, so that the floating matter can be intercepted more effectively.

Claims (5)

1. A split-type net cage for intercepting floating objects, characterized in that: it includes a net block (1), and the net block (1) is made into a three-sided mesh interception structure through a frame (2), and a diversion is provided in the three-sided mesh interception structure The plate (3), the two sides of the front end of the three-sided mesh interception structure are provided with a diversion connection net plate (4), and the diversion connection net plate (4) is close to the inner wall of the river channel. 2 . The split cage for intercepting floating objects according to claim 1 , characterized in that: the mesh of the blocking net ( 1 ) is 5 mesh/cm ² . 3. The split-type net cage for intercepting floating objects according to claim 1, characterized in that: the included angle between the deflector (3) and the plane of the net (1) is 45 degrees to 60 degrees. 4. A split-type net cage for intercepting floating objects according to claim 1, characterized in that: the three-sided mesh intercepting structure is formed by connecting a plurality of branches in series, each branch is provided with a chute, A baffle (5) is selectively inserted in the chute. 5. A split-type net cage for intercepting floating objects according to claim 1, characterized in that: the three-sided mesh intercepting structure is arranged in multiple channels.