An active codend device and an array-type active codend system

Abstract

The present invention discloses an active cyst net device, which comprises a frame, a cyst net, a guiding socket pipe and a sewage collecting pipe; one end of the frame is the water inlet end, and the other end is the sewage collecting end, and the sewage collecting pipe is fixed at the sewage collecting end; one end of the cyst net is fixed on the water inlet end of the frame, and the other end is fixedly connected with one end of the guiding socket pipe, and the other end of the guiding socket pipe is communicated with the sewage collecting pipe, and the cyst net gradually converges from the water inlet end of the frame to the sewage collecting end; one end of the sewage collecting pipe is communicated to a sewage collecting pool, and a pump is arranged on the sewage collecting pipe. The active cyst net has a simple structure and can quickly clean dirt such as prawns, ensuring the cleanliness of the water source.

Description

Technical Field

[0001] The present invention relates to the technical field of power plant cold source water filtration, and specifically relates to an active cyst net device and an array type active cyst net system. Background Art

[0002] In power plants, including nuclear power plants and thermal power plants, external cold water is required to cool the high-temperature circuit to ensure work efficiency and production safety. The external cold water used is usually called the cold source, and the cold source exchanges heat with hot water / hot gas through very thin heat exchange tubes. Therefore, in order to avoid blockage of the heat exchange tubes, it is necessary to ensure that the cold source water does not contain solid impurities.

[0003] The usual solution is to use a coarse grid + fine grid + rotary drum screen or rotary filter for step-by-step filtration and cleaning. However, when there are extremely large amounts of small-sized marine organisms, such as Acetes chinensis, it will exceed the filtering capacity of the above system, causing blockage of the last-stage filtering mechanism, triggering relevant safety production mechanisms, and forcing the generator set to reduce power or stop running. This will cause huge economic losses. At the same time, due to the sudden stop of the power station, it may also cause power grid imbalance and serious economic consequences. For the above situation, the method of using fixed fishing gear to catch Acetes chinensis and other marine organisms is usually adopted. The size of Acetes chinensis is very small, and the body diameter of juvenile Acetes chinensis does not exceed 1 mm, and the length is about 10 mm. This requires that the mesh of the fishing net is very small and the length of the fishing net is very long to meet the fishing requirements. Otherwise, the fishing gear will fail due to mesh blockage. At the same time, after a certain amount of Acetes chinensis is caught, manual collection and net cleaning are carried out, resulting in high fishing costs, high safety risks, low fishing efficiency, and it is difficult to handle the situation of large peak catches of Acetes chinensis. Summary of the Invention

[0004] The present invention proposes an active cyst net device for the above problems.

[0005] The technical means adopted by the present invention are as follows:

[0006] An active cyst net device, comprising a frame, a cyst net, a guiding socket pipe and a sewage collection pipe;

[0007] One end of the frame is the water inlet end, and the other end is the sewage collection end, and the sewage collection pipe is fixed at the sewage collection end;

[0008] One end of the cyst net is fixed on the water inlet end of the frame, the other end is fixedly connected to one end of the guiding socket pipe, the other end of the guiding socket pipe is communicated with the sewage collection pipe, and the cyst net gradually converges from the water inlet end of the frame to the sewage collection end;

[0009] One end of the sewage collection pipe is communicated to a sewage collection tank, and a pump is provided on the sewage collection pipe.

[0010] Further, the sewage collection pipe includes a main pipe section, a connection section, and a transition section. Both ends of the connection section are connected to the main pipe section through the transition section. The guiding socket pipe is connected to the side wall of the connection section. The diameter of the connection section is smaller than that of the main pipe section, and the transition section is a reducing pipe.

[0011] Further, the guiding socket pipe is a reducing pipe with a gradually decreasing diameter from the end connected to the cyst net to the other end.

[0012] Further, a crushing device is also provided inside the guiding socket pipe.

[0013] Further, a pump is provided at one end of the sewage collection pipe, and the other end communicates with a sewage collection tank.

[0014] Further, one end of the sewage collection pipe is connected to a water source, and the other end communicates with a sewage collection tank. A pump is provided at the end of the sewage collection pipe that communicates with the sewage collection tank.

[0015] An array-type active cyst net system includes a plurality of the active cyst net devices disclosed in the present invention. The plurality of active cyst net devices are connected to form an active cyst net group. One or more of the sewage collection pipes in the active cyst net group are sequentially connected to form multiple groups of main sewage collection pipes, and a pump is provided on the main sewage collection pipes.

[0016] Compared with the prior art, the active cyst net device disclosed in the present invention has the following advantages. Due to the provision of the cyst net, the guiding socket pipe, and the sewage collection pipe, the cyst net can effectively collect tiny marine organisms such as Acetes chinensis, and the pump can discharge the collected tiny marine organisms such as Acetes chinensis through the guiding socket pipe and the sewage collection pipe, avoiding the blockage of the cyst net by a large number of Acetes chinensis. At the same time, it ensures the cleanliness of the cold source of the power plant and avoids the blockage of the heat exchange pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an axonometric view of the first embodiment of the active cyst net device disclosed in the present invention;

[0018] Figure 2 is a front view of the first embodiment of the active cyst net device disclosed in the present invention;

[0019] Figure 3 is Figure 2 a cross-sectional view taken along line A-A in

[0020] Figure 4 is the second embodiment of the active cyst net device disclosed in the present invention. In this embodiment, both the guiding socket pipe and the sewage collection pipe are equal-diameter pipes;

[0021] Figure 5Structural diagram of the first embodiment of the array-type active purse seine system disclosed by the present invention. In the figure, a 5x3 purse seine group array is formed, and multiple sewage collection pipes in each row are sequentially connected to form a main sewage collection pipe;

[0022] Figure 6 Structural diagram of the second embodiment of the array-type active purse seine system disclosed by the present invention. In the figure, a 3x5 purse seine group array is formed, and multiple sewage collection pipes in each column are sequentially connected to form a main sewage collection pipe.

[0023] In the figure: 1. Frame, 10. Water inlet end, 11. Sewage collection end, 12. Frame rod, 2. Purse seine, 3. Guide socket pipe, 4. Sewage collection pipe, 40. Main pipe section, 41. Connection section, 42. Transition section, 5. Crushing device, 6. Main sewage collection pipe. Detailed implementation manners

[0024] As Figure 1 、 Figure 2 and Figure 3 shown, the active purse seine device disclosed by the present invention includes a frame 1, a purse seine 2, a guide socket pipe 3, and a sewage collection pipe 4; in this embodiment, the frame 1 is formed by connecting multiple frame rods 12 to each other. One end of the frame 1 is a water inlet end 10, and the other end is a sewage collection end 11. The sewage collection pipe 4 is fixed at the sewage collection end 11. The purse seine 2 is composed of a net sheet with fine mesh holes. In this embodiment, it is mainly used for catching Acetes chinensis, so the side length of the mesh holes is generally about 3 mm. The purse seine is made of a soft material or a rigid net. In this embodiment, the purse seine is made of a soft material. One end of the purse seine 2 is fixed on the water inlet end 10 of the frame by means of knotting and winding, etc. The purse seine is fixed at the water inlet end to form a dirt collection inlet that opens outwards. The other end is fixedly connected to one end of the guide socket pipe 3. The other end of the purse seine is fixed on a rigid frame (such as a metal ring) by means of knotting and winding or other means, and the rigid frame is then connected to the guide socket pipe by means of bolts or quick connectors, etc. The other end of the guide socket pipe 3 communicates with the sewage collection pipe 4, and the purse seine 2 gradually converges from the water inlet end 10 of the frame towards the sewage collection end 11; one end of the sewage collection pipe 4 communicates with a sewage collection tank, and a pump is provided on the sewage collection pipe. The pump can discharge dirt such as Acetes chinensis collected by the purse seine into the sewage collection tank.

[0025] The working principle of the active net device disclosed in the present invention is as follows. The active net device is placed in water, and the water inlet end of the frame faces the water flow direction of the water source, that is, the water flows into the net from the water inlet end (dirt collection inlet). The net is composed of a mesh with fine mesh holes and is made of soft or hard materials. Most of the water entering the net is discharged through the net holes, and a small part of the water and marine organisms such as prawns are collected and together pass through the guiding socket pipe into the sewage collection pipe. The pump on the sewage collection pipe can pump out the prawns and water in the sewage collection pipe for further treatment. The active net device disclosed in the present invention realizes the collection and timely discharge of prawns, avoids the blockage of the net by prawns, ensures the water quality of the power plant's cold source and the safe operation of the power plant. At the same time, it also does not require manual fishing for prawns and cleaning of the net, improves work efficiency, and avoids production safety risks in high sea conditions.

[0026] Specifically, in one embodiment, one end of the sewage collection pipe 4 is provided with a pump, and the other end is connected to a sewage collection tank. The pump pumps a first water flow into the sewage collection pipe from one end of the sewage collection pipe. The first water flow flows in the sewage collection pipe and forms a suction effect at the guiding socket pipe, so that a second water flow is formed from the guiding socket pipe into the sewage collection pipe. The two water flows are mixed in the sewage collection pipe and then discharged into the sewage collection tank. By setting the sewage collection tank and the pump at both ends of the sewage collection pipe and setting the pump at the end of the sewage collection pipe, it is possible to prevent the dirt collected by the net from directly passing through the pump, ensuring the reliable operation of the pump for a long time.

[0027] In another embodiment, one end of the sewage collection pipe is connected to the water source, and the other end is connected to the sewage collection tank. The end of the sewage collection pipe connected to the sewage collection tank is provided with a pump. The pump can suck the water from the water source through the sewage collection pipe to form a first water flow. The suction effect of the pump can also suck the dirt and water at the guiding socket pipe to form a second water flow. The first water flow and the second water flow are mixed in the sewage collection pipe and then flow into the sewage collection tank. At the same time, the first water flow also forms a suction effect at the guiding socket pipe to facilitate the discharge of the dirt collected by the net into the sewage collection tank.

[0028] As Figure 4 shown, in the present invention, the sewage collection pipe can be a pipe with a constant diameter, and the diameter of the guiding socket pipe can be less than or equal to the diameter of the sewage collection pipe. Preferably, the sewage collection pipe is a pipe with a variable diameter. Specifically, as Figure 3 shown, the sewage collection pipe 4 includes a main pipe section 40, a connecting section 41, and a transition section 42. The two ends of the connecting section 41 are respectively connected to the main pipe section 40 through the transition section 42. The guiding socket pipe 3 is connected to the side wall of the connecting section 41. The diameter of the connecting section 41 is smaller than the diameter of the main pipe section 40. The transition section 42 is a pipe with a variable diameter. Adopting this structure can further increase the suction effect at the guiding socket pipe and quickly discharge the dirt collected by the net into the sewage collection tank.

[0029] Further, the guiding socket pipe 3 is a pipe with a gradually decreasing diameter from the end connected to the cyst net to the other end. The guiding socket pipe being a pipe with a gradually decreasing diameter can increase the water flow speed in the pipe and improve the sewage discharge and carrying capacity.

[0030] Further, a crushing device is also provided in the guiding socket pipe 3. Specifically, the crushing device can be a rotary blade device driven by a motor. The crushing device is fixed in the guiding socket pipe through a bracket. The rotary blade can crush the collected prawns so as to be discharged into the sewage collection tank through the sewage collection pipe.

[0031] As Figure 5 and Figure 6 The figures show two embodiments of the array - type active cyst net system disclosed by the present invention. As shown in the figures, it includes a plurality of active cyst net devices disclosed by the present invention. A plurality of the active cyst net devices are connected to form an active cyst net group. One or more of the sewage collection pipes in the active cyst net group are sequentially connected to form multiple groups of main sewage collection pipes. A pump is provided on the main sewage collection pipes. Specifically, the number of active cyst net devices in the figure is 15. A plurality of the active cyst net devices are arranged in an array to form an active cyst net group. The frames of a plurality of the active cyst net devices can be integrally manufactured or can be a split structure. When it is a split structure, a plurality of frames are connected through connecting members. Figure 5 Form an array of 5x3. In this embodiment, the sewage collection pipes of a plurality of active cyst net devices in each row in the active cyst net group are sequentially connected to form 3 groups of main sewage collection pipes 6 (i.e., the main sewage collection pipes are horizontally arranged). Figure 6 In the figure, the cyst net array is an array of 3x5. The sewage collection pipes of a plurality of active cysts in each column in the active cyst net group are sequentially connected to form 3 groups of main sewage collection pipes 6 (i.e., the main sewage collection pipes are vertically arranged). Flanges can be provided at both ends of the sewage collection pipe for easy connection to each other or structures such as quick interfaces can be provided for mutual connection. A pump is provided on the main sewage collection pipe 6. A pump can be provided for each group of main sewage collection pipes, or multiple groups of main sewage collection pipes can share one pump. In this embodiment, the pump is provided at one end of the main sewage collection pipe. The other end of the main sewage collection pipe is communicated with the sewage collection tank. The pump pumps water into the main sewage collection pipe and sucks the sewage collected by the cyst net into the sewage collection tank. In the present invention, by setting the active cyst net array structure, the frame spreads the netting of the cyst net, making the shape of the cyst net relatively fixed and not affected by the wind and waves. At the same time, adopting the array - type structure can reduce the length of each cyst net, reducing the layout space of the active cyst net system, but increasing the overall area of the cyst net, effectively increasing the interception area of the cyst net (all areas of the cyst net netting), and can effectively intercept the sewage. Further, the cyst net is set into an array structure, and the array - type active cyst net as a whole can be lifted out of the water by devices such as floating bodies or fishing boats for overall maintenance. And when one or more of the cyst nets are damaged, the other cyst nets can still work normally, ensuring the robustness of the filtration.

[0032] In the above embodiments, the cross-sectional shape of the frame is quadrilateral, so that the dirt collection inlet is a square opening. The cross-sectional shape of the frame can also be set into other shapes according to needs, such as hexagon. The cross-sectional shape of the active net group formed by connecting multiple active net bags can be set according to needs to meet the collection of acetes or other dirt and ensure the cleanliness of the water source.

[0033] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention should cover within the protection scope of the present invention by equivalent replacement or change according to the technical solution and inventive concept of the present invention.

Claims

1. An active netting device, characterized in that: It includes a framework, a cyst net, a guiding socket pipe and a sewage collecting pipe; The framework is formed by connecting multiple framework rods. One end of the framework is the water inlet end, and the other end is the sewage collecting end. The sewage collecting pipe is fixed at the sewage collecting end; One end of the cyst net is fixed on the water inlet end of the framework. The other end of the cyst net is fixed on a rigid framework. The rigid framework is connected to one end of the guiding socket pipe, so that the other end of the cyst net is fixedly connected to one end of the guiding socket pipe. The other end of the guiding socket pipe is communicated with the sewage collecting pipe, and the cyst net gradually converges from the water inlet end of the framework to the sewage collecting end; One end of the sewage collecting pipe is communicated with a sewage collecting pool, and a pump is provided on the sewage collecting pipe; The sewage collecting pipe includes a main pipe section, a connecting section and a transition section. The two ends of the connecting section are respectively connected to the main pipe section through the transition section. The guiding socket pipe is connected to the side wall of the connecting section. The diameter of the connecting section is smaller than that of the main pipe section, and the transition section is a reducing pipe.

2. The active net bag device according to claim 1, characterized in that: The guiding socket pipe is a reducing pipe with a gradually decreasing diameter from the end connected to the cyst net to the other end.

3. The active net bag device according to claim 1 or 2, characterized in that: A crushing device is also provided in the guiding socket pipe.

4. The active netting device according to claim 3, characterized in that: A pump is provided at one end of the sewage collecting pipe, and the other end is communicated with a sewage collecting pool.

5. The active net device according to claim 3, characterized in that: One end of the sewage collecting pipe is connected to a water source, and the other end is communicated with a sewage collecting pool. A pump is provided at the end of the sewage collecting pipe communicated with the sewage collecting pool.

6. An array-type active net system, characterized in that: It includes multiple active cyst net devices according to any one of claims 1 to 5. The multiple active cyst net devices are connected to form an active cyst net group. One or more of the sewage collecting pipes in the active cyst net group are sequentially connected to form multiple groups of main sewage collecting pipes, and a pump is provided on the main sewage collecting pipes.

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