CN211322768U - Oncomelania snail blocking net is prevented with middle level water intaking to oncomelania snail sedimentation tank - Google Patents

Abstract

The utility model discloses a oncomelania blocking is prevented in middle level water intaking for oncomelania sedimentation tank, the oncomelania blocking is prevented in middle level water intaking is including floating frame and blocking device, the blocking device floats in rivers through floating the frame, the blocking device is including preventing the oncomelania net, prevents that the oncomelania net from propping up frame construction through a plurality of dead levers, connects through preventing the oncomelania net between the adjacent dead lever, it has frame construction to float the frame, the blocking device passes through the dead lever and floats the frame and can dismantle the connection, and the lower part that floats the frame is provided with the fixed anchor, the fixed anchor passes through the sub-unit connection of anchor with floating the frame. Under the condition of guaranteeing the snail blocking effect, the middle-layer water-taking oncomelania-preventing blocking net has the advantages of simple structure, convenience in installation, convenience in maintenance and disassembly, low cost, economy, practicability and the like, and solves the problems of water blocking due to blockage, complex installation, overhigh cost and poor oncomelania-preventing effect of the existing middle-layer water-taking oncomelania-preventing blocking net.

Description

Oncomelania snail blocking net is prevented with middle level water intaking to oncomelania snail sedimentation tank

Technical Field

The utility model relates to a oncomelania prevention and treatment technology, in particular to a middle-layer water-taking oncomelania-prevention block net for an oncomelania settling pond.

Background

The oncomelania inhabits in fresh water and is amphibious, basically has schistosomiasis in areas where the oncomelania is bred, schistosomiasis is prevalent, schistosomiasis takes the oncomelania as an intermediate host, and after entering a human body, the oncomelania inhabits small blood vessels of a blood venous system of the human body, metabolites of the oncomelania are toxic and can damage tissues of the human body, so that the human body loses certain normal physiological functions. In order to reduce the propagation of schistosome, researchers in domestic sciences such as oncomelania ecology and hydraulics in recent 20 years show that the oncomelania is in two distribution states of water surface and water bottom in a static water body, the middle layer of the water body is usually free of oncomelania, the oncomelania is mainly distributed at the bottom layer in a dynamic water body, and the diffusion of the oncomelania in the water body mainly depends on adsorption of floating objects to diffuse along with water flow on the water surface layer, which is the main mode of oncomelania diffusion.

According to the research results, the prior measures provide snail prevention measures such as blocking nets, middle-layer water taking, advection precipitation and the like, and can directly kill plagues in the water areas where the schistosoma exists or directly kill the host oncomelania of the schistosoma, thereby carrying out effective prevention measures.

However, analysis shows that the existing middle-layer water-taking oncomelania-preventing block net is easy to block and can block water, the installation of the oncomelania-preventing block net is complex and has high cost and poor oncomelania-preventing effect, and needs to be improved urgently.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: aiming at the problems existing in the prior art, the middle-layer water taking oncomelania preventing block net for the oncomelania settling tank is provided, under the condition that the oncomelania preventing effect is guaranteed, the middle-layer water taking oncomelania preventing block net has the advantages of being simple in structure, convenient to install, convenient to maintain and disassemble, low in cost, economical and practical and the like, and the problems that the existing middle-layer water taking oncomelania preventing block net blocks water, is complex to install, is too high in cost and has poor oncomelania preventing effect are solved.

The utility model adopts the technical scheme as follows: the utility model provides a oncomelania barrier is prevented in water intaking in middle level for oncomelania sedimentation tank, its characterized in that, the oncomelania barrier is prevented in water intaking in middle level includes floats frame and block device, the block device floats in rivers through floating the frame, the block device is including preventing the oncomelania net, prevents the oncomelania net through a plurality of dead levers support frame construction, connects through preventing the oncomelania net between the adjacent dead lever to form this frame construction's netted side, it has frame construction to float the frame, the block device passes through the dead lever and floats the frame and can dismantle the connection to form enclosure's block structure on floating the up end of frame, the lower part of floating the frame is provided with fixed anchor, fixed anchor passes through the sub-unit connection of wire rope for the anchor and showy frame.

Furthermore, one side of the floating frame is provided with a water taking hole, when the middle-layer water taking oncomelania prevention blocking net is used, the fixed anchor at the lower part of the floating frame sinks into the bottom of the water flow channel, the floating frame is dragged by the anchor through a steel wire rope to stay in the water flow, and the blocking net device at the upper end of the floating frame floats out of the water surface.

Further, a transverse snail blocking net is arranged on the floating frame, is positioned in the frame of the floating frame and is fixedly connected with the floating frame, and is arranged relative to the lower end surface of the floating frame so as to form a net-shaped end surface of the floating frame.

Further, the bottom of the floating frame is provided with a bolt, the bolt is arranged at the edge position of the bottom of the floating frame and is fixedly connected with the floating frame through threads, one end of the anchor steel wire rope is wound and connected onto the bolt, and the other end of the anchor steel wire rope is wound and connected onto the fixed anchor.

Further, the dead lever includes first dead lever and second dead lever, and first dead lever and second dead lever set up at the top or the upper portion of floating the frame, and first dead lever sets up in pairs to set up in one side of floating the frame, and with floating frame fixed connection, the second dead lever also sets up in pairs, and sets up at the opposite side of floating the frame, and with floating frame fixed connection, first dead lever and second dead lever set up relatively.

Further, a first fixed cylinder is arranged on the first fixed rod in a matched mode, one end of the first fixed cylinder is fixedly connected with the floating frame, and the first fixed rod and the first fixed cylinder can be fixedly connected through a fixing nut.

Furthermore, a second fixing cylinder is arranged on the second fixing rod in a matched mode, a clamping groove is formed in the bottom of the second fixing rod, and the clamping groove is used for clamping and connecting the anti-spiral net.

Further, the surface of the second fixed cylinder is provided with a first fixed groove and a second fixed groove, and the anti-spiral net is embedded into the first fixed groove and the second fixed groove respectively.

Furthermore, the inside fixed orifices that still is equipped with of second fixed cylinder, the fixed orifices setting is put at the inside central point of second fixed cylinder, and the fixed orifices is each other with the second dead lever and is supporting the setting and realize fixed connection through fixation nut.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that: the middle-layer water-taking oncomelania-preventing block net for the oncomelania settling tank has the advantages of simple structure, convenience in installation, convenience in maintenance and disassembly, low cost, economy, practicability and the like under the condition of ensuring the oncomelania-preventing effect, and solves the problems of blocking and water-preventing, complex installation, overhigh cost and poor oncomelania-preventing effect of the existing middle-layer water-taking oncomelania-preventing block net.

Drawings

FIG. 1 is a schematic plane structure diagram of a oncomelania settling tank for hydraulic and hydroelectric engineering of the present invention;

FIG. 2 is a schematic sectional view of I-I in FIG. 1;

FIG. 3 is a schematic sectional view of II-II in FIG. 1;

FIG. 4 is a schematic cross-sectional view of III-III of FIG. 1;

FIG. 5 is a schematic view of a barricade according to the present invention;

FIG. 6 is a schematic view of a partial enlarged structure of the shaft seat for installing the screw retaining wall according to the present invention;

FIG. 7 is a schematic view of a partially enlarged structure of a limiting shaft seat of the screw retaining wall of the present invention;

FIG. 8 is a schematic view of a partially enlarged structure of the positioning shaft sleeve of the snail blocking wall of the present invention;

FIG. 9 is a schematic view of the enlarged structure of the screw retaining wall hinge of the present invention;

FIG. 10 is a schematic view of a middle-layer water-intake oncomelania-prevention blocking net of the present invention;

FIG. 11 is a schematic longitudinal sectional view of FIG. 10;

FIG. 12 is a schematic view of the second stationary barrel of FIG. 10;

fig. 13 is a schematic view of the anti-snaking structure of fig. 10.

The labels in the figure are: 1 is a pond inlet connecting section, 101 is an energy dissipation groove, 102 is a sedimentation groove, 2 is a sedimentation section, 3 is a pond outlet connecting section, 4 is a channel reinforcing section, 401 is a reinforced cement wall, 402 is a water outlet, 5 is a confluence section, 501 is a water inlet, 6 is a first filter screen, 7 is a second filter screen, 8 is a screw blocking wall, 801 is a flow guide mechanism, 8011 is a flow guide plate, 8012 is a cross rod, 8013 is a fastening shaft sleeve, 8014 is an installation shaft seat, 80141 is a first reinforcing plate, 8015 is a limiting shaft sleeve, 80151 is a second reinforcing plate, 8016 is a main shaft, 802 is a screw blocking mechanism, 8021 is a screw blocking plate, 8022 is a floating body, 8023 is a hanging ring, 8024 is a steel wire rope, 8025 is a positioning shaft sleeve, 8026 is a hinge, 9 is a middle-layer water taking and screw blocking net, 901 is a floating frame, 9011 is a first fixing rod, 9012 is a second fixing rod, 902 is a clamping groove, 9021 is a screw blocking device, 9021 is a screw blocking net, 90211 is a screw blocking net, 9022 is a transverse net rack, 903 is a first fixed cylinder, 904 is a second fixed cylinder, 9041 is a first fixed groove, 9042 is a second fixed groove, 9043 is a fixed hole, 905 is a water taking hole, 906 is a bolt, 907 is an anchor steel wire rope, 908 is a fixed anchor, and 909 is a fixed nut.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is 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 of the invention and are not intended to limit the invention.

As shown in fig. 1 to 4, a oncomelania settling tank for water conservancy and hydropower engineering comprises a confluence section 5, a tank inlet connecting section 1, a settling section 2, a tank outlet connecting section 3 and a channel reinforcing section 4 which are connected in sequence, in the embodiment, the confluence section 5 is distributed in a square pipeline shape, the front section of the confluence section is provided with a water inlet 501, an inclined first filter screen 6 (which is arranged according to actual conditions) is arranged in the front section of the confluence section in a crossing manner, the tank inlet connecting section 1 comprises an energy dissipation groove 101 which is arranged in a sinking inclined manner and a settling groove 102 which is arranged horizontally, the whole body of the energy dissipation groove 101 and the settling groove 102 is in a horn-opening radial shape, the bottom of the settling groove 102 is lower than the confluence section 5 and the tank outlet connecting section 3, the front part of the settling section 2 is provided with a vertical second filter screen 7 (which is arranged according to actual conditions), the middle part of the settling section 2 is provided with a screw blocking wall 8, and the second, the sedimentation section 2 is integrally in a square groove shape, the bottom of the sedimentation section is lower than the confluence section 5 and the pond outlet connecting section 3, the sedimentation section can be equal to the height of the sedimentation tank 102, the front part of the pond outlet connecting section 3 is in a step shape, the bottom of the pond outlet connecting section is higher than the confluence section 5, the whole pond outlet connecting section 3 is in a contraction shape with an inverted horn-shaped opening, reinforced cement walls 401 are arranged on the upper side and the lower side of the channel reinforcing section 4, the middle part of each reinforced cement wall 401 is a water outlet 402, intervals exist between the reinforced cement walls 401 on the upper side and the lower side to form a water flow channel, a water taking opening (not marked in the drawing) is arranged on the channel reinforcing section 4, and a middle water taking oncomela.

As shown in fig. 5-9, the snail blocking wall 8 includes a snail blocking mechanism 802, the snail blocking mechanism 802 includes a plurality of snail blocking plates 8021, the snail blocking plates 8021 are hinged together side by a hinge 8026 to form a snail blocking portion (which may also be hinged by other hinge structures, which is not limited to the manner using the hinge 8026), a floating body 8022 for floating the snail blocking plates 8021 on the water surface is disposed on an upper portion of the snail blocking plate 8021, the floating body 8022 may be horizontally disposed at a middle position of a top portion of the snail blocking plate 8021, which may also be slightly offset or inclined, two sides of the snail blocking portion are respectively sleeved on the main shaft 8016, and the snail blocking portion can freely slide along an axial direction of the main shaft 8016, for example, the snail blocking portion may be sleeved on the main shaft 8016 by a positioning shaft sleeve 8025, and then slide up and down on the main shaft 8016 by the positioning shaft sleeve 8025, the flow guiding mechanism 801 is located below the snail blocking portion, and the flow guiding mechanism 801 is formed by connecting a, two sides of the flow guide mechanism are respectively fixedly connected with the lower part of the main shaft 8016. Specifically, the floating body 8022 is fixedly connected with the snail blocking plate 8021 through bolts, and the positioning shaft sleeve 8025 is vertically arranged at the edge of the side wall of the snail blocking plate 8021 and is welded and fixed or fixed with the snail blocking plate 8021 through bolts. The top end of the main shaft 8016 penetrates through the positioning shaft sleeve 8025, and is in clearance fit with the positioning shaft sleeve 8025, and the thread blocking plate 8021 can be positioned by the arranged positioning shaft sleeve 8025, so that the thread blocking plate 8021 can only move up and down along the main shaft 8016.

Further, a hanging ring 8023 is arranged at a position on the side wall of the screw blocking plate 8021, the hanging ring 8023 is vertically arranged on the screw blocking plate 8021 and is fixedly connected with the screw blocking plate 8021 through bolts or welding, a steel wire rope 8024 is arranged on the side surface of the screw blocking plate 8021, the steel wire rope 8024 sequentially penetrates through the hanging ring 8023, and the screw blocking plate 8021 is pulled through the arranged steel wire rope 8024 in cooperation with the hanging ring 8023.

Further, as shown in fig. 5, the flow guiding mechanism 801 includes a flow guiding plate 8011, a cross bar 8012, a fastening shaft sleeve 8013, a mounting shaft seat 8014, a limiting shaft seat 8015 and a main shaft 8016, where a plurality of flow guiding plates 8011 are connected in series through a cross bar 8012, end surfaces of the flow guiding plates 8011 are disposed opposite to each other, an end surface of the screw blocking plate 8021 is not parallel to an end surface of the flow guiding plate 8011 (in the embodiment of fig. 5, the screw blocking plate 8021 is disposed perpendicular to the end surface of the flow guiding plate 8011 in a space), a space is left between adjacent flow guiding plates 8011, which may be distributed at equal intervals or not distributed at equal intervals, the cross bar 8012 penetrates through the end surface of the flow guiding plate 8011, the flow guiding plate 8011 is fixedly connected to the cross bar 8012, in the embodiment of fig. 5, the number of the cross bar 8012 may be 4, of which may be selected as required, and the number of 2, and the cross, of course, it may be inclined at a certain angle), the cross bar 8012 may be fixedly connected with the flow guide plate 8011 through the fastening shaft sleeve 8013, or may be fixedly connected through a fastening member.

Further, in order to better fixedly connect the flow guiding mechanism 801 with the main shaft 8016, as shown in fig. 6, an installation shaft seat 8014 and a limiting shaft seat 8015 are arranged on a side wall of the guide plate 8011 located at an edge side of the flow guiding mechanism 801, the installation shaft seat 8014 is vertically welded to the guide plate 8011, a first reinforcing plate 80141 is welded to one side of the installation shaft seat 8014, the limiting shaft seat 8015 is vertically arranged at the top of the installation shaft seat 8014 and is welded to the guide plate 8011, a second reinforcing plate 80151 is welded to one side of the limiting shaft seat 8015, the bottom end of the main shaft 8016 is embedded into the inside of the installation shaft seat 8014 to realize fixed installation, and the main shaft 8016 is fixed by arranging the limiting shaft seat 8015, so that the stability of the main. Of course, the flow guiding mechanism 801 may also be directly fixedly connected to the main shaft 8016 through a fastener, and other fixedly connecting structures may also be adopted.

The utility model discloses a block the theory of operation of spiral shell wall 8 and do: the flow guide mechanism 801 is placed in a river channel by a worker, the positioning shaft sleeves 8025 of the two spiral shells blocking plates 8021 on the edges are nested on the main shaft 8016, the spiral shells blocking plates 8021 can sink into water along the main shaft 8016 under the action of self gravity, the spiral shells blocking plates 8021 can vertically float on the water surface due to the floating bodies 8022 arranged at the tops, when oncomelania adhere to a floating object and float from the water surface, the oncomelania collide with the spiral shells blocking plates 8021, then the oncomelania falls off and falls down to the bottom of a river bed, other oncomelania adhering to the floating object can pass through the guide plates 8011 when the oncomelania floats from the bottom of the spiral shells blocking plates 8021, the flow direction of water flow can be limited by the guide plates 8011, the water flow can be rapidly recovered and stabilized, the flow state of the guide plates 8011 is further, and the sinking speed of the oncomela.

The snail blocking wall 8 is provided with the snail blocking mechanism 802 and the flow guide mechanism 801 to avoid forming a larger backflow area, so that water flow can be quickly recovered to be stable, snail settlement is facilitated, and the snail blocking and sinking effects are outstanding and superior to the existing snail blocking wall structure.

Further, the utility model discloses still include a middle level water intaking oncomelania prevention block 9 that oncomelania sedimentation tank used, as shown in fig. 10-13, middle level water intaking oncomelania prevention block 9 includes floats frame 901 and block device 902, block device 902 floats in water intaking department through floating frame 901. Specifically, the barrier net 902 includes a net-shaped anti-screw net 9021, the anti-screw net 9021 supports a frame structure through a plurality of fixing rods, adjacent fixing rods are connected through the anti-screw net 9021 to form a net-shaped side surface of the frame structure, the floating frame 901 has a frame structure, the barrier net 902 is detachably connected to the floating frame 901 through the fixing rods to form a fence-type barrier net structure on an upper end surface of the floating frame 901, a fixing anchor 908 is provided at a lower portion of the floating frame 901, and the fixing anchor 908 is connected to a lower portion of the floating frame 901 through an anchor steel wire rope 907.

Further, a bolt 906 is arranged at the bottom of the floating frame 901, the bolt 906 is vertically arranged at the edge position of the bottom of the floating frame 901 and fixedly connected with the floating frame 901 through threads, a steel wire rope 907 for anchors is arranged on the surface of the bolt 906, one end of the steel wire rope 907 for anchors is wound and connected on the bolt 906, and the other end of the steel wire rope 907 for anchors is wound and connected on the fixed anchor 908.

More specifically, in the embodiment shown in fig. 10 to 13, a connecting plate (not shown) is disposed on one side of the floating frame 901, a water taking hole 905 is disposed on the connecting plate, the fixing rods include a first fixing rod 9011 and a second fixing rod 9012, the first fixing rod 9011 and the second fixing rod 9012 are disposed on the top or upper portion of the floating frame 901, the first fixing rods 9011 are a pair, the pair of first fixing rods 9011 are vertically disposed on one side of the floating frame 901 (i.e., on the side opposite to the water taking hole 905) and are in threaded fixed connection with the floating frame 901 through threads, the second fixing rod 9012 is also a pair, the pair of second fixing rods 9012 are vertically disposed on the other side of the floating frame 901 (i.e., on the side where the water taking hole 905 is located) and are in threaded fixed connection with the floating frame 901 through threads, and the second fixing rods 9012 are disposed opposite to.

Furthermore, the first fixing rod 9011 is provided with a first fixing cylinder 903 in a matching manner, one end of the first fixing cylinder 903 is fixedly connected with the floating frame 901, the first fixing rod 9011 and the first fixing cylinder 903 can be fixedly connected with each other through a fixing nut 909, that is, the first fixing cylinder 903 is sleeved outside the first fixing rod 9011, so that the first fixing cylinder 903 is convenient to maintain and detach. Correspondingly, a second fixing rod 9012 is provided with a second fixing cylinder 904, the bottom of the second fixing rod 9012 is provided with a clamping groove 9013, as shown in fig. 11, the clamping groove 9013 is vertically arranged at an edge position of an inner wall of one side of the floating frame 901, the second fixing cylinder 904 and the first fixing cylinder 903 may be the same in structure or different in structure, a first fixing groove 9041 and a second fixing groove 9042 are formed in the surface of the second fixing cylinder 904, and the first fixing groove 9041, the second fixing groove 9042 and the clamping groove 9013 may be the same in structure and size. Further, a fixing hole 9043 is further formed in the second fixing cylinder 904, the fixing hole 9043 can be vertically arranged in the center of the second fixing cylinder 904, and the fixing hole 9043 and the second fixing rod 9012 are arranged in a matched manner and fixedly connected through a fixing nut 909.

Further, as shown in fig. 13, a net rack 90211 and a gauze 90212 are arranged inside the anti-spiral net 9021, the gauze 90212 is horizontally arranged on the inner side wall of the net rack 90211, the gauze 90212 is connected with the net rack 90211, the gauze 90211 can be made of polyethylene window gauze or other materials meeting performance requirements, the net rack 90211 and the slot 9013 are arranged in a matched manner to realize clamping, correspondingly, the net rack 90211 of the anti-spiral net 9021 is respectively embedded into the slot 9013, the first fixing slot 9041 and the second fixing slot 9042, the slot type arrangement facilitates regular replacement and cleaning of the anti-spiral net 9021, and the water intake hole 905 can be circular or rectangular according to actual conditions.

In order to further improve the snail blocking effect of the middle water taking oncomelania preventing blocking net 9, as shown in fig. 11, a transverse snail blocking net 9022 is arranged on the floating frame 901, the transverse snail blocking net 9022 is positioned in the frame of the floating frame 901 and is fixedly connected with the floating frame 901 in a threaded or clamped manner, and the transverse snail blocking net 9022 is arranged opposite to the lower end face of the floating frame 901 to form a net-shaped end face of the floating frame 901.

The working principle of the middle-layer water-taking oncomelania-preventing barrier net 9 of the embodiment is as follows: the length of an anchor wire rope 907 to be prepared is determined according to the actual water level depth on site, then after the anti-screw nets 9021 are respectively embedded into the clamping groove 9013, the first fixing groove 9041 and the second fixing groove 9042, a first fixed cylinder 903 and a second fixed cylinder 904 are respectively nested on the first fixed rod 9011 and the second fixed rod 9012, the fixing nuts 909 are tightened to be fixedly connected to each other, both ends of the anchor wire 907 are fixedly connected to the bolt 906 and the fixing anchor 908, then an external water taking pipe is connected to the inner side of the water taking hole 905, then the middle-layer water taking oncomelania preventing blocking net 9 is thrown into the water taking hole, the fixed anchor 908 sinks into the river bottom and is fixed in position, the floating frame 901 floats upwards under the action of buoyancy force but is fixed in the middle layer position of the water level under the pulling force of the anchor steel wire rope 907, the top of the oncomelania preventing net 9021 floats out of the water level, thereby preventing the oncomelania floating on the water surface and crawling on the river bed from entering the interior region of the barrier net assembly 902.

The utility model discloses a oncomelania barrier is prevented in middle level water intaking 9 is guaranteeing to block under the condition of snail effect, makes middle level water intaking prevent oncomelania barrier 9 have simple structure, simple to operate, be convenient for maintain and dismantle, advantage such as with low costs economy, solved the jam that current middle level water intaking prevents oncomelania barrier exists block water, the installation is complicated, with too high costs and prevent the not good problem of oncomelania effect. Therefore, based on the utility model discloses a conceive, it can also have multiple deformation mode, for example, it can not adopt solid fixed cylinder or dead lever completely, also or directly make into a whole with block device 2, perhaps directly set up block device and floating frame into whole piecing together formula structure, consequently, the utility model discloses a middle level water intaking oncomelania-prevention block 9's concrete structure is not restricted to above-mentioned specific embodiment.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1. A middle-layer water-taking oncomelania-preventing blocking net for an oncomelania settling pond is characterized in that the middle-layer water-taking oncomelania-preventing blocking net (9) comprises a floating frame (901) and a blocking net device (902), the blocking net device (902) floats in water flow through the floating frame (901), the blocking net device (902) comprises a screw-prevention net (9021), the screw-prevention net (9021) supports a frame structure through a plurality of fixing rods, adjacent fixing rods are connected through the screw-prevention net (9021), to form the net-like sides of the frame structure, said floating frame (901) having a frame structure, the blocking net device (902) is detachably connected with the floating frame (901) through a fixed rod, so as to form a fence type blocking net structure on the upper end surface of the floating frame (901), the lower part of the floating frame (901) is provided with a fixed anchor (908), the fixed anchor (908) is connected with the lower part of the floating frame (901) through an anchor wire rope (907).

2. The middle water taking and oncomelania preventing block for the oncomelania settling pond as claimed in claim 1, wherein one side of the floating frame (901) is provided with a water taking hole (905), when the middle water taking and oncomelania preventing block (9) is used, a fixed anchor (908) at the lower part of the floating frame (901) sinks into the bottom of a water flow channel, the floating frame (901) is dragged by a steel wire rope (907) for the anchor to stay in the water flow, and a block device (902) at the upper end of the floating frame (901) floats out of the water surface.

3. The middle-layer water taking and oncomelania preventing block for the oncomelania settling pond as claimed in claim 1 or 2, wherein a transverse oncomelania blocking net (9022) is arranged on the floating frame (901), the transverse oncomelania blocking net (9022) is positioned in the frame of the floating frame (901) and fixedly connected with the floating frame (901), and the transverse oncomelania blocking net (9022) is arranged relative to the lower end face of the floating frame (901) to form a net-shaped end face of the floating frame (901).

4. The middle-layer water taking and oncomelania preventing barrier net for the oncomelania settling pond as claimed in claim 3, wherein bolts (906) are arranged at the bottom of the floating frame (901), the bolts (906) are arranged at the edge position of the bottom of the floating frame (901) and fixedly connected with the floating frame (901) through threads, one end of a steel wire rope (907) for an anchor is wound on the bolts (906), and the other end of the steel wire rope (907) for the anchor is wound on a fixed anchor (908).

5. The middle water taking and oncomelania preventing barrier net for the oncomelania settling pond as claimed in claim 4, wherein the fixing rods comprise a first fixing rod (9011) and a second fixing rod (9012), the first fixing rod (9011) and the second fixing rod (9012) are arranged at the top or the upper part of the floating frame (901), the first fixing rods (9011) are arranged in pairs and are arranged at one side of the floating frame (901) and are fixedly connected with the floating frame (901), the second fixing rods (9012) are also arranged in pairs and are arranged at the other side of the floating frame (901) and are fixedly connected with the floating frame (901), and the first fixing rod (9011) and the second fixing rod (9012) are arranged oppositely.

6. The middle-layer water taking and oncomelania preventing blocking net for the oncomelania settling pond as claimed in claim 5, wherein the first fixing rod (9011) is provided with a first fixing barrel (903) in a matching manner, one end of the first fixing barrel (903) is fixedly connected with the floating frame (901), and the first fixing rod (9011) and the first fixing barrel (903) can be fixedly connected with each other through a fixing nut (909).

7. The middle-layer water taking oncomelania prevention blocking net for the oncomelania settling pond as claimed in claim 6, wherein a second fixing cylinder (904) is arranged on the second fixing rod (9012) in a matched mode, a clamping groove (9013) is arranged at the bottom of the second fixing rod (9012), and the clamping groove (9013) is used for clamping the oncomelania prevention net (9021).

8. The middle water taking and oncomelania preventing barrier net for the oncomelania settling pond as claimed in claim 7, wherein the surface of the second fixed cylinder (904) is provided with a first fixed groove (9041) and a second fixed groove (9042), and the oncomelania preventing net (9021) is embedded in the first fixed groove (9041) and the second fixed groove (9042) respectively.

9. The middle water taking and oncomelania preventing block net for the oncomelania settling pond as claimed in claim 8, wherein a fixing hole (9043) is further arranged inside the second fixing cylinder (904), the fixing hole (9043) is arranged at the center inside the second fixing cylinder (904), and the fixing hole (9043) and the second fixing rod (9012) are mutually matched and fixedly connected through a fixing nut (909).

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