CN114894437A - An experimental device for studying the coupled hydrodynamic properties of the column-net structure - Google Patents

Abstract

The invention discloses a test device for studying the coupling hydrodynamic characteristics of a column-net structure, including an integral support frame, a net angle adjustment device, a net moving device, a telescopic rod, a six-component force sensor, a connecting rod, and a net frame. , nets and uprights; the overall support frame supports the experimental device; the angle between the nets can be adjusted precisely through the angle adjustment device of the nets; the net moving device is arranged on the overall support frame and can be connected to the overall support frame The other end of the telescopic rod is fixedly connected with the six-component force sensor; the six-component force sensor is fixedly connected with the connecting rod; the connecting rod is fixedly connected with the mesh frame; the two ends of the column are fixedly connected with the connecting rod; Fixed in the mesh frame. The present invention realizes various combinations of the column structure and the net structure through the modularized and detachable design, and provides a test device with more functions to meet the required test conditions.

Description

An experimental device for studying the coupled hydrodynamic characteristics of the column-net structure

technical field

The invention relates to the field of ships and marine engineering, in particular to a test device for studying the coupled hydrodynamic characteristics of a column-net structure of deep-sea aquaculture equipment.

Background technique

In recent years, the cage aquaculture industry has developed rapidly, and domestic research on cages has also begun. Due to the limitation of offshore aquaculture space and increasingly serious environmental problems, marine aquaculture is gradually advancing to the deep-sea field. As a typical deep-sea aquaculture equipment, semi-submersible aquaculture equipment is characterized by a combination of an overall rigid frame and multiple meshes. The research on its specific hydrodynamic characteristics in the marine environment is still limited. At present, the hydrodynamic calculation of the cage is generally solved by separately solving the external frame and the net structure, and then superimposing the overall structure force, without considering the frame and the net structure. Hydrodynamic interaction between nets. Most of the cage frames at home and abroad are cylindrical structures. From a local perspective, the entire cage frame is composed of several net-column-net structures, so it is important to understand the coupled hydrodynamic characteristics of the column-net structure. Research hotspots.

In the study of the hydrodynamic properties of netting structure, model test is a very key research method. Under normal circumstances, the research on the hydrodynamics of the net is generally divided into the measurement of the flow field and the force, that is, the change of the flow field and the change of the force of the net before and after the water flow through the net structure. The equipment to be used is a force sensor and a PIV measuring instrument. At present, the model devices used at home and abroad are mainly single-net devices, which are simple and easy to install, but consider more parameters and environmental variables of the net, such as the angle between the net and the flow, the multi-net system, the net In combination with other structures, etc., these netting devices do not meet these test conditions. Therefore, in the study of the hydrodynamic properties of the column-net structure, a test device with more functions is required to meet the required test conditions.

Therefore, those skilled in the art are devoted to developing a new experimental device for studying the coupled hydrodynamic characteristics of the column-net structure of deep-sea aquaculture equipment.

SUMMARY OF THE INVENTION

In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to realize various combinations of the column structure and the net structure through a modular and detachable design, so as to facilitate the research on the column-net structure. In hydrodynamic characteristics, a test device with more functions is provided to meet the required test conditions.

In order to achieve the above purpose, the present invention provides a test device for studying the coupling hydrodynamic characteristics of the column-net structure, which is characterized in that it includes an integral support frame, a mesh angle adjustment device, a mesh moving device, a telescopic rod, a Force sensor, connecting rod, mesh frame, mesh and upright column; the overall support frame is a frame structure, which supports the experimental device; one end of the mesh angle adjustment device is connected to the mesh moving device The other end is fixedly connected with the telescopic rod, and the angle between the nets can be adjusted precisely through the angle adjustment device of the nets; the moving device of the nets is arranged on the overall support frame and Can be moved on the integral support frame; the telescopic rod is fixedly connected with the six-component force sensor; the six-component force sensor is fixedly connected with the connecting rod; the connecting rod is fixed with the mesh frame connection; the net clothes are fixed in the frame of the net clothes; the two ends of the uprights are respectively fixedly connected with the connecting rods.

Further, the integral support frame is composed of an aluminum alloy frame, the length of the upper end is relatively long, the beams extending from both ends can be placed horizontally on the sink for suspended placement, and the bottom is provided with foot pads, which can be used for sitting. Bottom placement.

Further, the angle adjustment device of the net clothes has one set at the top and bottom of each of the frame of the net clothes, and is equipped with an angle disc, which can accurately adjust the angle between the two net clothes. The angle adjustment device of the net clothing further comprises a collar, the collar is matched with the telescopic rod, the telescopic rod can be rotated in the collar, and the collar and the mobile device of the net clothing pass through an elasticated Threaded fixed connection, so as to realize the rotation function.

Further, a set of the net clothes moving device is provided on the top and bottom of each net clothes frame, the net clothes moving device includes a sliding beam, a sliding plate and a sliding block, and the sliding beam and the integral The supporting frames are fixedly connected by screwable bolts, the sliding plate is fixed on the sliding beam by the sliding block and the bolts embedded in the groove of the sliding beam, and by moving the sliding beam and the Slide the plate to achieve the movement of the net.

Further, the telescopic rod is made of a number of hollow round rods whose diameters are successively reduced. The nested hollow round rods can move with each other and are fixed by bolts. The telescopic rod is adjusted at an angle close to the net. There is an indicator arrow on the top of one end of the device to display the current angle.

Further, the six-component force sensor can measure the force and bending moment in three directions in the current state, and one is installed on the top and bottom of the mesh frame and the upright column, and two of the six-component force sensor are installed. The ends are respectively fixedly connected with the telescopic rod and the connecting rod through bolts.

Further, the mesh frame is made of stainless steel, the cross section of the frame is circular to reduce the influence on the surrounding flow state, and the inner side of the frame is provided with small holes for fixing the mesh.

Further, the mesh is made of resin material 3D printed, and can also be replaced by other materials.

Further, it also includes a diversion structure, the diversion structure is arranged to wrap on the underwater part of the integral support frame, and the diversion structure reduces the change of water flow near the rod through a streamlined design. Hydrodynamic effects of column structures.

Further, the upright column is a hollow and unsealed structure, and is fixedly connected to the connecting rod through the screw holes at the upper and lower ends.

Compared with the traditional method and device, the present invention has the following beneficial effects:

In the present invention, in the hydrodynamic experiment of measuring the column-net structure, the column structure and the net structure are combined based on the modular and detachable design. It realizes the functions of adjustable angle and position of the net, which can adapt to a variety of working conditions, and can adapt to different test sites by changing the placement of the device; The working conditions of the mesh test have extremely high scalability. In the actual test, the hydrodynamic interaction between the net and the column was studied based on three working conditions, namely, the net and the column were placed at the same time, and only the net was placed and only the column was placed.

The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, characteristics and effects of the present invention.

Description of drawings

1 is a schematic front view of a preferred embodiment of the present invention;

Fig. 2 is a three-dimensional schematic diagram of a preferred embodiment of the present invention;

Fig. 3 is the schematic diagram of the angle adjustment device of the net clothes according to a preferred embodiment of the present invention;

4 is a schematic diagram of a bottom-end net clothing moving device according to a preferred embodiment of the present invention;

FIG. 5 is a schematic diagram of a moving device for an upper net garment according to a preferred embodiment of the present invention.

Among them, 1-integral support frame, 2-net clothing angle adjustment device, 3-net clothing moving device, 4- telescopic rod, 5- six-component force sensor, 6- connecting rod, 7- mesh clothing frame, 8- mesh clothing , 9-guide structure, 10-column.

Detailed ways

The following describes several preferred embodiments of the present invention with reference to the accompanying drawings, so as to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.

In the drawings, structurally identical components are denoted by the same numerals, and structurally or functionally similar components are denoted by like numerals throughout. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thicknesses of components are appropriately exaggerated in some places in the drawings.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The present invention is aimed at a new test device for studying the coupled hydrodynamic characteristics of the column-net structure of deep-sea aquaculture equipment, and aims to provide a test device with more functions to meet the working conditions required for the test of the column-net combination structure .

In the actual measurement of the hydrodynamic process of the column-net structure, the entire device was placed in a circulating water tank, and the net and column structure were immersed at a certain height below the water surface to avoid the influence of the free liquid surface. At the same time, the Pitot tube installed in front of the device, the force sensor and PIV measuring instrument connected to the net and the column can measure the entire flow field, flow rate, and the force of the net and the column. The device is mainly composed of an integral support frame, a mesh angle adjustment device, a mesh moving device, a telescopic rod, a six-component force sensor, a connecting rod, a mesh frame, a mesh, a deflector, and a column. Among them, the overall support frame has two support modes, the test device can be placed by sitting on the bottom and hanging; The adjustment device is equipped with a dial showing the angle, and the rod connecting the net is rotated by controlling the tightness of the screw; the telescopic rod is connected to the angle adjustment device of the net and the six-component force sensor, and can be used for different sizes through the adjustment of the length of the telescopic rod The fixing of the net frame; the six-component force sensor is used to measure the force of the net and the column; the net frame is used to fix the net and connect with the whole device; Hydrodynamic effects of mesh-column structures.

The present invention is achieved through the following technical solutions. As shown in FIG. 1, the device of the present invention includes: an integral support frame 1, a net clothes angle adjustment device 2, a net clothes moving device 3, a telescopic rod 4, a six-component force sensor 5, Connecting rod 6 , mesh frame 7 , mesh 8 , diversion structure 9 , upright column 10 . Among them: the overall support frame 1 is the fixed bracket of the entire mesh test device, and is connected with the internal mesh structure through the mesh moving device 3; the mesh angle adjustment device 2 is an important module to realize the function of changing the angle between the two meshes , it has a set of devices at the top and bottom of each mesh frame, one end is fixed to the mesh moving device 3, and the other end is connected to the mesh frame 7 through a telescopic rod 4; the telescopic rod 4 is connected to the mesh moving device 3 and The six-component force sensor 5; the connecting rod 6 connects the six-component force sensor 5 and the net clothes frame 7; the net clothes 8 is fixed in the net clothes frame 7; Both ends of the upright column 10 are fixedly connected with the connecting rod 6 .

The overall support frame 1 is composed of an aluminum alloy frame, the length of the upper end is longer, the beams extending from both ends can be placed horizontally on the sink for hanging placement, and there are several foot pads at the bottom, which can be used for sitting on the bottom. .

As shown in Figure 3, the mesh angle adjustment device 2 has one set at the top and bottom of each mesh, and is equipped with an angle disc, which can precisely adjust the angle between the two meshes. The mesh angle adjustment device 2 includes a collar, the collar cooperates with the telescopic rod 4, the telescopic rod 4 can be rotated in the collar, and the collar is fixed on the sliding plate of the net clothing moving device 3 through a loose screw, so as to realize the rotation function.

As shown in Figures 4 and 5, the net clothing moving device 3 is composed of a sliding beam, a sliding plate and a slider, and one set is provided at the top and bottom respectively. The sliding beam is fixed to the main beam of the overall support frame 1 by tightening bolts. The sliding plate is fixed on the sliding beam by the slider and bolts embedded in the groove of the sliding beam. The movement of the net is realized by moving the sliding beam and the sliding plate fixedly connected with the angle adjusting device 2 of the net.

The telescopic rod 4 is made of several hollow round rods with decreasing diameters. The nested hollow round rods can move with each other and are fixed by bolts. The top of the telescopic rod has an indicator arrow to display the current angle. The end is connected with the six-component force sensor 5.

The six-component force sensor 5 can measure the force and bending moment in three directions in the current state, and one is assembled on the top and bottom of the net frame 7 and the upright column 10, and is connected with the telescopic rod 4 and the connecting rod 6 through bolts.

The connecting rod 6 is made of a solid thin iron rod with a certain rigidity, and the tail end is provided with a screw hole, which is fixedly connected with the net clothes frame 7 .

The mesh frame 7 is made of stainless steel, and the cross section of the frame is circular to reduce the influence on the surrounding flow. The inner side of the frame is provided with small holes for fixing the net 8 .

The mesh 8 is made of resin material 3D printed, and can also be replaced by other materials.

As shown in FIG. 2 , the guide structure 9 can be subdivided into streamlined guide plates wrapped around the four uprights of the support frame 1 and streamlined rubber guide bars wrapped around all the bottom frames of the support frame 1. The guide structure 9 passes through The streamlined design reduces the effect of water flow changes near the rod on the hydrodynamics of the net-column structure.

The upright column 10 is a hollow and unsealed structure, and is fixedly connected to the connecting rod 6 through the screw holes at the upper and lower ends.

The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the present invention shall fall within the protection scope determined by the claims.

Claims (10)

1. A test device for researching the coupling hydrodynamic characteristics of an upright post-netting structure is characterized by comprising an integral supporting frame, a netting angle adjusting device, a netting moving device, a telescopic rod, a six-component force sensor, a connecting rod, a netting frame, a netting and an upright post; the integral supporting frame is of a frame type structure and plays a supporting role for the experimental device; one end of the netting angle adjusting device is fixedly connected with the netting moving device, the other end of the netting angle adjusting device is fixedly connected with the telescopic rod, and the included angle between the netting can be accurately adjusted through the netting angle adjusting device; the netting moving device is arranged on the integral supporting frame and can move on the integral supporting frame; the telescopic rod is fixedly connected with the six-component force sensor; the six-component force sensor is fixedly connected with the connecting rod; the connecting rod is fixedly connected with the netting frame; the netting is fixed in the netting frame; the two ends of the upright post are respectively fixedly connected with the connecting rod.

2. The experimental device for studying the hydrodynamic characteristics of the column-netting structure coupling according to claim 1, wherein the integral supporting frame is made of an aluminum alloy frame, the upper end of the integral supporting frame is longer in length direction, the cross beams extending from the two ends of the integral supporting frame can be transversely arranged on the water tank for hanging placement, and the bottom of the integral supporting frame is provided with a foot pad for sitting-bottom placement.

3. The experimental device for studying the hydrodynamic characteristics of a column-netting structure coupling according to claim 1, wherein said netting angle adjusting device comprises a set at the top and bottom of each netting frame and an angle scale for precisely adjusting the angle between two netting frames, said netting angle adjusting device further comprises a sleeve ring, said sleeve ring is engaged with said telescopic rod, said telescopic rod is rotatable in said sleeve ring, said sleeve ring is fixedly connected with said netting moving device by a thread capable of being loosened, thereby realizing a rotating function.

4. The test device for studying the hydrodynamic characteristics of the column-net structure coupling according to claim 1, wherein each of the net frames is provided with a set of net moving devices at the top and bottom thereof, the net moving devices comprise a sliding beam, a sliding plate and a sliding block, the sliding beam is fixedly connected with the integral supporting frame through a screw bolt, the sliding plate is fixed on the sliding beam through the sliding block and the screw bolt embedded in the sliding beam groove, and the movement of the net is realized by moving the sliding beam and the sliding plate.

5. The experimental device for studying the hydrodynamic characteristics of a column-netting structure coupling according to claim 1, wherein said telescopic rod is made of a plurality of hollow round rods with successively decreasing diameters, the nested hollow round rods can move relative to each other and are fixed by bolts, and said telescopic rod is provided with an indication arrow at a top end near one end of said netting angle adjusting device for displaying a current angle.

6. The test device for studying the hydrodynamic characteristics of a column-netting structure coupling according to claim 1, wherein the six-component force sensor is capable of measuring forces and bending moments in three directions under the current condition, the six-component force sensor is respectively assembled on the top and the bottom of the netting frame and the column, and two ends of the six-component force sensor are respectively fixedly connected with the telescopic rod and the connecting rod through bolts.

7. The experimental apparatus for studying the hydrodynamic characteristics of a column-netting structure coupling as claimed in claim 1, wherein said netting frame is made of stainless steel, the cross-section of the frame is circular to reduce the influence on the surrounding flow pattern, and the inner side of the frame is provided with small holes for fixing said netting.

8. The experimental device for studying the hydrodynamic characteristics of a column-net structure coupling according to claim 1, wherein the net is printed with a resin material 3 d.

9. The experimental apparatus for studying the hydrodynamic characteristics of a column-netting structure coupling according to claim 1, further comprising a flow guiding structure configured to wrap around the underwater portion of the integral support frame, wherein the flow guiding structure is streamlined to reduce the influence of the flow variation near the rod on the hydrodynamic characteristics of the netting-column structure.

10. The experimental device for studying the hydrodynamic characteristics of the column-netting structure coupling according to claim 1, wherein the column is a hollow unsealed structure and is fixedly connected with the connecting rod through screw holes at the upper end and the lower end.

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