A test device for simulating the impact of pressure change environment on fish during the submergence of cages

Abstract

The present invention discloses a test device for simulating the influence of cage culture environment on fish, in particular, a test device for simulating the influence of pressure change environment on fish during cage submergence, comprising: a bracket; a pressure vessel, which is provided with a joint I for external compressed gas to enter the cavity, a joint II for external high-pressure water to enter the cavity, a one-way valve, and a pressure sensor for converting the water pressure signal in the cavity into an electrical signal output; the water in the cavity flows out through the one-way valve and forms a water flow environment with a set flow direction in the cavity; and a power and transmission device, which drives the pressure vessel to perform sloshing motion; wherein the pressure vessel and the power and transmission device are both installed on the working surface of the bracket. The present invention solves the technical problem of "realizing the adaptability of simulated cultured fish in the cage submergence process". The present invention can provide a reference for the research on the control technology of the submergence process of the submerged cage.

Description

Technical Field

[0001] The invention relates to a testing device for simulating the influence of a cage culture environment on fish, in particular to a testing device for simulating the influence of a pressure change environment during a cage submergence process on fish. Background Art

[0002] At present, there are a huge number of small offshore cages, and there are problems such as excessive breeding density, ecological environment damage, and disease pollution. Moreover, most of them use wooden boards and foam floats as floating frame systems, which have poor wind and wave resistance and can only be used in inner bays or estuaries. my country's mainstream HDPE gravity deep-water cages, with nearly 20 years of technological development, still cannot guarantee resistance to typhoon direct attacks, and have suffered repeated losses. It is difficult to adapt to the impact of strong currents and waves in open waters. Most cages still cannot do without the shelter of islands and favorable terrain.

[0003] In order to alleviate the development problems of nearshore marine aquaculture and achieve sustainable development of marine aquaculture, it has become an inevitable trend to expand aquaculture space to deep and deep open seas with good water quality. The water quality of deep and deep open seas is clear and rich in nutrients, which is conducive to the growth of aquaculture. However, due to the particularity of the location of the sea area, these areas are often affected by natural factors such as wind and waves, typhoons, etc., which brings certain risks and challenges to the aquaculture industry. With the development of industrial technology, deep and deep sea ultra-large cages have gradually developed, among which a submersible cage with the ability to actively avoid wind and waves on the sea surface has emerged. Under severe weather conditions, such as typhoons and storms, the submersible cage can sink to a certain depth underwater to reduce the impact of wind and waves on the cage and farmed fish, reducing the risk of loss. However, it is still in the exploratory stage. Especially in the process of cage submersion, the speed of cage submersion and the stability of submersion will cause fish to be affected by water pressure changes, wave and current loads, etc., and adjust the fish bladder and adjust the posture of the fish body, etc. Physiological reactions will affect the physical functions of farmed fish and even cause death.

[0004] In order to explore the influence of pressure change environment and wave and current load on farmed fish during the cage submergence process, a test device simulating the cage submergence process was designed, including the simulation of water pressure environment at different submergence speeds and the simulation of wave and current load at the stability of cage submergence, so as to observe the adaptability of farmed fish in the cage submergence process and provide a reference for the research on control technology of cage submergence process.

[0005] Therefore, the present invention is proposed. Summary of the invention

[0006] The purpose of the present invention is to solve the above-mentioned deficiencies of the prior art and to provide a testing device for simulating the influence of the pressure change environment during the submergence of a cage on fish.

[0007] In order to achieve the above-mentioned purpose, the present invention is a test device designed to simulate the influence of the pressure change environment on fish during the submergence of a cage, and its structure includes:

[0008] Bracket;

[0009] A pressure vessel, which is provided with a joint I for external compressed gas to enter the chamber, a joint II for external high-pressure water to enter the chamber, a one-way valve, and a pressure sensor for converting the water pressure signal in the chamber into an electrical signal output; the water in the chamber flows out through the one-way valve and forms a water flow environment with a set flow direction in the chamber;

[0010] and, a power and transmission device, which drives the pressure vessel to perform sloshing motion;

[0011] The pressure vessel and the power and transmission devices are all installed on the working surface of the bracket.

[0012] The specific design principle of the present invention is as follows:

[0013] (1) Pressure control simulation: The pressure vessel simulates the cage culture environment. External compressed gas enters the pressure vessel to indirectly control the water pressure in the container. By adjusting the pressure and the speed of change, the water pressure changes at different speeds when the cage dives or floats can be simulated, thereby studying the physiological adaptability of fish.

[0014] (2) Wave and current load simulation: The external impact of wave loads is simulated by shaking the pressure vessel with a certain amplitude, and the water flow is simulated by circulating flow to observe the survival status and adaptability of fish under wave and current loads. This can help evaluate the fish's tolerance to waves and optimize the design of aquaculture cages to reduce the impact of waves on fish.

[0015] Preferably, the above-mentioned test device for simulating the effect of the pressure change environment on fish during the cage submergence process has the following structure:

[0016] The pressure vessel comprises: a top cover, a cylinder and a bottom cover; the joint I, the one-way valve and the pressure sensor are all installed on the bottom cover; the cylinder is a vertical structure;

[0017] The top cover comprises a cover body I, a cover body II and a valve; the connector II is installed on the cover body II;

[0018] Wherein, the cover body II and the bottom end cover are respectively installed on the ports of the cylinder body, and the cover body II and the bottom end cover are flange-connected, and the cover body I blocks and locks the nuts of the cover body II, the cylinder body and the bottom end cover;

[0019] The cover body I and the cover body II of the concentric structure are locked to each other in the axial direction through a buckle structure, and are unlocked by the self-rotation of the cover body I and / or the cover body II;

[0020] The cover body I and the cover body II are locked to each other in the circumferential direction by a valve, and are unlocked when the real-time pressure value in the pressure container is ≤ the pressure threshold value A, and the pressure threshold value A is a preset value;

[0021] The power and transmission device comprises: a pair of screw slider mechanisms I, a transmission pulley assembly, a stepper motor or servo motor I, a pair of swing rod assemblies, a connecting rod, a screw slider mechanism II, a stepper motor or servo motor II and an articulated seat;

[0022] The screw rod Ⅰ of each screw rod slider mechanism Ⅰ is mounted on the work surface of the bracket through the fixing seat Ⅰ, and the screw rod Ⅰ extends in the horizontal direction A. The slider Ⅰ is mounted on the screw rod Ⅰ and moves linearly in the extension direction of the screw rod Ⅰ;

[0023] The stepper motor or servo motor I is installed on the working table of the bracket and is connected to the screw rod I of a pair of screw rod slider mechanisms I through a transmission pulley assembly;

[0024] The screw rod II of the screw rod slider mechanism II is installed on the fixed seat II and extends in the ray direction of the work surface of the bracket. The hinge seat is installed on the bracket. The fixed seat II of the screw rod slider mechanism II is hinged to the hinge seat. The screw rod II performs circular motion around the vertical axis of the aforementioned horizontal direction A. The slider II is installed on the screw rod II and performs linear motion in the extension direction of the screw rod II. The stepper motor or servo motor II is installed on the fixed seat II and is connected to the screw rod II in transmission.

[0025] Each swing rod assembly comprises a support rod and a swing rod, the support rod is mounted on the bracket, the swing rod is hinged to the support rod and moves in a circle around a vertical axis in the aforementioned horizontal direction A;

[0026] One end portion of a pair of swing rods is connected to each other through a connecting rod, and the connecting rod is mounted on the slider II;

[0027] The pressure vessel is located in the middle of a pair of screw slider mechanisms Ⅰ, the bottom end cover of the pressure vessel is hinged to the slider Ⅰ of the pair of screw slider mechanisms Ⅰ through a pair of hinge shafts Ⅰ, and the cover body Ⅱ of the pressure vessel is hinged to the other end of the pair of swing rods through a pair of hinge shafts Ⅱ;

[0028] The stepper motor or servo motor Ⅰ drives the pressure vessel to perform reciprocating linear displacement in the horizontal direction A through the screw slider mechanism Ⅰ, and the synchronous screw slider mechanism Ⅱ drives a pair of rocker arms to perform reciprocating circular motion through the stepper motor or servo motor Ⅱ, thereby driving the pressure vessel to perform reciprocating circular motion around the vertical axis of the aforementioned horizontal direction A.

[0029] The pressure vessel in the preferred embodiment has a vertical cylinder structure. By increasing the height of the cylinder and thus increasing the volume and cross-sectional length of the pressure vessel, the horizontal space is not occupied much while ensuring that the farmed fish have a relatively larger swimming area and are closer to the breeding environment of the breeding cage. However, in order to ensure that the farmed fish have a relatively larger swimming area during the test, the vertical cylinder needs to be flipped under the drive of the power and transmission device before the test begins, that is, it needs to switch between the vertical and horizontal states.

[0030] In addition, the top cover of the structure adopts a split design of cover body I and II. Cover body II and the bottom cover are connected and locked with cover body II, cylinder body and bottom cover through flanges. Cover body I blocks the nuts that lock cover body II, cylinder body and bottom cover. The concentric cover body I and cover body II are locked with each other in the axial direction and can only be unlocked by self-rotation of cover body I and / or cover body II. Cover body I and cover body II are locked with each other in the circumferential direction through valves. Therefore, the pressure can only be released first, that is, wait for the real-time pressure value in the pressure vessel to be ≤ pressure threshold A. (safety pressure value), after the valve switching state of cover body I and cover body II is synchronously locked in the circumferential direction, cover body I can be opened by rotating cover body I and / or cover body II, and then the nuts locking cover body II, cylinder body and bottom end cover can be removed. At this time, cover body II, cylinder body and bottom end cover originally locked by flanges can be opened. Therefore, the present invention can completely prevent the situation of "opening the cover body without releasing the pressure in the pressure vessel (that is, reducing it to below the safety pressure value) to cause dangerous hidden dangers".

[0031] In the above-mentioned test device for simulating the impact of the pressure change environment on fish during the cage submergence process, at least the cylinder is preferably transparent to facilitate direct external observation of the adaptive behavior of farmed fish in the pressure vessel when the pressure size and pressure change rate in the pressure vessel change.

[0032] In the above-mentioned test device for simulating the effect of pressure change environment on fish during the submerged process of the cage, the specific installation structure of the cover body II and the bottom end cover on the port of the cylinder is preferably selected as follows:

[0033] The surfaces of the cover body II and the bottom end cover facing the cylinder are both provided with annular grooves, and the ports on both sides of the cylinder are respectively inserted into the corresponding annular grooves and wedged tightly to each other.

[0034] In the above-mentioned test device for simulating the effect of pressure change environment on fish during the submerged process of the cage, the specific structure of the connection between the cover body II and the bottom end cover flange is preferably selected as follows:

[0035] The cover body II and the bottom end cover are both provided with through holes, which are evenly distributed around their respective peripheries;

[0036] Bolts are evenly distributed on the outer ring of the cylinder, and the bolts pass through the through holes on the bottom end cover and the cover body II in sequence and are then locked by nuts.

[0037] In the above-mentioned test device for simulating the effect of the pressure change environment on fish during the submerged process of the cage, the buckle structure of the cover body I and the cover body II is preferably selected as follows:

[0038] The side of the cover body II is provided with female buckles, which are evenly distributed in the circumferential direction. The side of the cover body I is provided with male buckles, which are evenly distributed in the circumferential direction. The buckling state of the male buckle and the female buckle is switched by the rotation of the cover body I and / or the cover body II.

[0039] In the above-mentioned test device for simulating the effect of pressure change environment on fish during the submerged process of the cage, the specific structure in which the cover body I and the cover body II are locked to each other in the circumferential direction by the valve is preferably selected as follows:

[0040] The valve comprises: a valve seat, a valve core shaft and a coil spring;

[0041] The valve seat is provided with a cavity, and an axial hole I and an axial hole II independently penetrating the cavity, a limiting hole is provided on the cover body I, and a mounting hole is provided on the cover body II.

[0042] A protrusion is formed on the surface of the valve core shaft, and the shaft section I on one side of the protrusion passes through the shaft hole I of the valve seat, and the shaft section II on the other side passes through the shaft hole II of the valve seat.

[0043] The spiral spring bushing is mounted on the shaft section I, the protrusion of the valve core shaft and the inner edge of the shaft hole II abut against each other, and the spiral spring abuts between the protrusion and the inner edge of the shaft hole I.

[0044] The valve is installed in the mounting hole of cover body II. When the real-time pressure value in the pressure vessel is greater than the pressure threshold A, the pressure of the pressure vessel drives the valve core shaft to compress the coil spring, and the shaft section I of the valve core shaft extends into the limiting hole of cover body I, and cover body I and cover body II are locked with each other in the circumferential direction.

[0045] Furthermore, the above-mentioned test device for simulating the impact of the pressure change environment on fish during the submersion process of the cage has a structure in which: the bottom end cover is also provided with an on / off switchable pipeline assembly, and is interconnected with the cavity of the pressure vessel, so as to control the on / off switching of the pipeline assembly and realize instantaneous regulation of the pressure in the pressure vessel by timely releasing the pressure in the pressure vessel, thereby further protecting the safety of the test equipment and operators.

[0046] Furthermore, the above-mentioned test device for simulating the impact of the pressure change environment on fish during the submersion process of the cage also includes a visual system in its structure for real-time monitoring of the interior of the pressure vessel. The above-mentioned visual system can further enhance the automation and intelligence of the test device. At the same time, using the visual system instead of naked eye observation can maximize the observation accuracy and avoid the influence of erroneous observation information caused by fatigued naked eyes on the test results.

[0047] Compared with the prior art, the test device for simulating the influence of the pressure change environment during the cage submergence process on fish obtained by the present invention has the following technical effects:

[0048] The test device of the present invention simulates the water pressure environment at different submergence speeds, and the wave and current loads of the cage submergence stability, so as to observe the adaptability of farmed fish in the cage submergence process, and provide a reference for the research on the control technology of the submergence process of the submergence cage. That is, it helps scientific researchers to better understand the survival status and adaptability of fish in the deep-sea aquaculture environment, and provides important reference and support for the development of deep-sea aquaculture technology. At the same time, by simulating the influence of various natural factors (wave loads, etc.), it can guide aquaculture operators to formulate scientific aquaculture strategies, improve aquaculture benefits and production stability. By more comprehensively simulating various natural influencing factors in the deep-sea environment, the design of aquaculture cages can be optimized, the aquaculture benefits can be improved, and the marine ecological environment can be protected.

[0049] The testing device of the present invention has a structure in which the top cover adopts a split design of cover bodies I and II. The cover body II and the bottom cover are connected and locked with the cover body II, the cylinder body and the bottom cover through flanges. The cover body I blocks the nuts that lock the cover body II, the cylinder body and the bottom cover. The cover bodies I and II of the concentric structure are locked with each other in the axial direction and can only be unlocked by the rotation of the cover body I and / or the cover body II. The cover bodies I and II are locked with each other in the circumferential direction through a valve. Therefore, the pressure can only be released first, that is, wait for the real-time pressure value in the pressure vessel to be ≤ the pressure threshold value. Value A (safety pressure value), after the valve switching state of cover body I and cover body II is synchronously locked in the circumferential direction, cover body I can be opened by rotating cover body I and / or cover body II, and then the nuts locking cover body II, cylinder body and bottom end cover can be removed. At this time, cover body II, cylinder body and bottom end cover originally locked by flanges can be opened. Therefore, the present invention can completely prevent the situation of "opening the cover body without releasing the pressure in the pressure vessel (that is, reducing it to below the safety pressure value) to cause dangerous hidden dangers" from happening.

[0050] The testing device of the present invention has a structure in which the cover body II, the cylinder body and the bottom end cover are mechanically locked, the structure is simple, and the stability is good.

[0051] The testing device of the present invention has a reasonable structural layout and does not occupy too much horizontal space. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a structural diagram of a test device (cylinder in horizontal state);

[0053] Figure 2 yes Figure 1 Structural diagram of the pressure vessel and power and transmission devices on the middle work surface;

[0054] Figure 3 yes Figure 2A partial enlarged view of the middle A;

[0055] Figure 4 yes Figure 1 Schematic diagram of the structure of the pressure vessel;

[0056] Figure 5 yes Figure 1 Schematic diagram of the structure of the medium pressure vessel (cover body I and cover body II 11 are separated);

[0057] Figure 6 yes Figure 4 Schematic diagram of the top structure of the medium pressure vessel;

[0058] Figure 7 yes Figure 6 Sectional view at aa in the middle;

[0059] Figure 8 yes Figure 7 A partial enlarged view of point B in the middle;

[0060] Fig. 9 It is a structural diagram of a test device (cylinder in vertical state);

[0061] Fig.10 It is a schematic diagram of the structure of the second test device (cylinder in horizontal state);

[0062] Fig.11 It is a schematic diagram of the structure of the third test device (cylinder in horizontal state).

[0063] In the figure: bracket 1, pressure vessel 2, joint I 3, joint II 4, one-way valve 5, pressure sensor 6, top cover 7, cylinder 8, bottom cover 9, cover body I 10, cover body II 11, valve 12, nut 13, screw slider mechanism I 14, drive pulley assembly 15, stepper motor or servo motor I 16, swing rod assembly 17, connecting rod 18, screw slider mechanism II 19, stepper motor or servo motor II 20, hinge seat 21, screw rod I 22, fixed seat I 23, work Working table 24, slider I 25, screw rod II 26, fixed seat II 27, slider II 28, support rod 29, rocker arm 30, hinge shaft I 31, hinge shaft II 32, ring groove 33, through hole 34, bolt 35, female buckle 36, male buckle 37, valve seat 38, valve core shaft 39, coil spring 40, cavity 41, shaft hole I 42, shaft hole II 43, limit hole 44, mounting hole 45, protrusion 46, shaft segment I 47, shaft segment II 48, pipeline assembly 49, visual system 50. DETAILED DESCRIPTION

[0064] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0065] like Figure 1-8 As shown, as an embodiment of the present invention, a test device for simulating the influence of the pressure change environment of the cage submergence process on fish provided in this embodiment includes:

[0066] Bracket 1;

[0067] The pressure container 2 is provided with a joint I3 for external compressed gas to enter the chamber, a joint II4 for external high-pressure water to enter the chamber, a one-way valve 5, and a pressure sensor 6 for converting the water pressure signal in the chamber into an electrical signal output; the water in the chamber flows out through the one-way valve 5 and forms a water flow environment with a set flow direction in the chamber;

[0068] and, a power and transmission device, which drives the pressure vessel 2 to perform sloshing motion.

[0069] The pressure vessel 2 in this embodiment includes: a top cover 7, a cylinder 8 and a bottom cover 9; the connector I 3, the one-way valve 5 and the pressure sensor 6 are all installed on the bottom cover 9; the cylinder 8 is a vertical structure;

[0070] The top cover 7 includes a cover body Ⅰ10, a cover body Ⅱ11 and a valve 12; the connector Ⅱ4 is installed on the cover body Ⅱ11;

[0071] The cover body II 11 and the bottom end cover 9 are respectively installed on the ports of the cylinder body 8, and the cover body II 11 and the bottom end cover 9 are flange-connected, and the cover body I 10 blocks the nuts 13 that lock the cover body II 11, the cylinder body 8 and the bottom end cover 9;

[0072] The cover body I10 and the cover body II11 of the concentric structure are locked to each other in the axial direction by a snap-fit ​​structure, and are unlocked by the self-rotation of the cover body I10 and / or the cover body II11;

[0073] The cover body I 10 and the cover body II 11 are locked to each other in the circumferential direction by the valve 12, and are unlocked when the real-time pressure value in the pressure container 2 is less than or equal to the pressure threshold value A, and the pressure threshold value A is a preset value;

[0074] The power and transmission device includes: a pair of screw slider mechanisms Ⅰ14, a transmission pulley assembly 15, a stepper motor or servo motor Ⅰ16, a pair of swing rod assemblies 17, a connecting rod 18, a screw slider mechanism Ⅱ19, a stepper motor or servo motor Ⅱ20 and an articulated seat 21;

[0075] The screw rod Ⅰ22 of each screw rod slider mechanism Ⅰ14 is mounted on the work surface 24 of the bracket 1 through the fixing seat Ⅰ23, and the screw rod Ⅰ22 extends in the horizontal direction A. The slider Ⅰ25 is mounted on the screw rod Ⅰ22 and moves linearly in the extension direction of the screw rod Ⅰ22;

[0076] The stepper motor or servo motor Ⅰ16 is mounted on the work surface 24 of the bracket 1 and is connected to the screw rod Ⅰ22 of a pair of screw rod slider mechanisms Ⅰ14 through a transmission pulley assembly 15;

[0077] The screw rod II 26 of the screw slider mechanism II 19 is installed on the fixed seat II 27 and extends in the ray direction of the work table 24 of the bracket 1. The hinge seat 21 is installed on the bracket 1. The fixed seat II 27 of the screw slider mechanism II 19 is hinged to the hinge seat 21. The screw rod II 26 moves in a circle around the vertical axis of the aforementioned horizontal direction A. The slider II 28 is installed on the screw rod II 26 and moves linearly in the extension direction of the screw rod II 26. The stepper motor or servo motor II 20 is installed on the fixed seat II 27 and is connected to the screw rod II 26 in transmission.

[0078] Each swing rod assembly 17 includes a support rod 29 and a swing rod 30. The support rod 29 is mounted on the bracket 1. The swing rod 30 is hinged to the support rod 29 and performs circular motion around the vertical axis of the horizontal direction A.

[0079] One end portion of a pair of swing rods 30 is connected to each other through a connecting rod 18, and the connecting rod 18 is mounted on the slider II 28 through a clamp;

[0080] The pressure vessel 2 is located in the middle of a pair of screw slider mechanisms Ⅰ14, the bottom end cover 9 of the pressure vessel 2 is hinged to the sliders Ⅰ25 of the pair of screw slider mechanisms Ⅰ14 through a pair of hinge shafts Ⅰ31, and the cover body Ⅱ11 of the pressure vessel 2 is hinged to the other end of the pair of swing rods 30 through a pair of hinge shafts Ⅱ32;

[0081] The stepper motor or servo motor Ⅰ16 drives the pressure vessel 2 to perform reciprocating linear displacement in the horizontal direction A through the screw slider mechanism Ⅰ14, and the synchronous screw slider mechanism Ⅱ19 drives a pair of rocker arms 30 to perform reciprocating circular motion through the stepper motor or servo motor Ⅱ20, thereby driving the pressure vessel 2 to perform reciprocating circular motion around the vertical axis of the aforementioned horizontal direction A.

[0082] The cylinder 8 of the pressure vessel 2 is a vertical structure. By increasing the height of the cylinder 8 and thus increasing the volume and cross-sectional length of the pressure vessel 2, it is ensured that the farmed fish have a relatively larger swimming area and are closer to the breeding environment of the breeding cages, while not occupying much horizontal space. However, in order to ensure that the farmed fish have a relatively larger swimming area during the test, the cylinder 8 of the vertical structure needs to be flipped under the drive of the power and transmission device before the test begins, that is, switched between vertical / horizontal states. The switching process is as follows: the cylinder 8 is in a vertical state, and at this time, one end of a pair of rocker arms 30 hinged to the cover body II 11 is at the highest point, and at the same time, the slider I 25 of the screw slider mechanism I 14 is at the far left, as shown in FIG. Fig. 9 As shown; when the cylinder 8 is in a horizontal state, the end of one side of the pair of swing rods 30 hinged to the cover body II 11 is at the lowest point, and the slider I 25 of the screw slider mechanism I 14 is at the rightmost end, as shown Figure 1 shown.

[0083] In this embodiment, the cylinder 8 is transparent, so as to facilitate direct observation of the adaptive behavior of the cultured fish in the pressure container 2 when the pressure size and pressure change speed in the pressure container 2 change.

[0084] The specific installation structure of the cover body II 11 and the bottom end cover 9 on the port of the cylinder body 8 in this embodiment is as follows:

[0085] The surfaces of the cover body II 11 and the bottom end cover 9 facing the cylinder body 8 are both provided with annular grooves 33, and the two side ports of the cylinder body 8 are respectively inserted into the corresponding annular grooves 33 and wedged against each other.

[0086] The specific structure of the flange connection between the cover body II 11 and the bottom end cover 9 in this embodiment is as follows:

[0087] The cover body II 11 and the bottom end cover 9 are both provided with through holes 34, which are evenly distributed around their respective peripheries;

[0088] Bolts 35 are evenly distributed on the outer ring of the cylinder 8 , and the bolts 35 sequentially penetrate through the through holes 34 on the bottom end cover 9 and the cover body II 11 and are then locked by nuts 13 .

[0089] In the above-mentioned test device for simulating the effect of pressure change environment on fish during the cage submergence process, the buckle structure of the cover body Ⅰ10 and the cover body Ⅱ11 is preferably selected as follows:

[0090] The side of the cover body II 11 is provided with a female buckle 36, which is evenly distributed in the circumferential direction. The side of the cover body I 10 is provided with a male buckle 37, which is evenly distributed in the circumferential direction. The buckling state of the male buckle 37 and the female buckle 36 is switched by the rotation of the cover body I 10 and / or the cover body II 11.

[0091] In this embodiment, the specific structure of the cover body I10 and the cover body II11 being locked to each other in the circumferential direction through the valve 12 is as follows:

[0092] The valve 12 includes: a valve seat 38, a valve core shaft 39 and a coil spring 40;

[0093] The valve seat 38 is provided with a cavity 41, and an axial hole I 42 and an axial hole II 43 independently penetrating the cavity 41. The cover body I 10 is provided with a limiting hole 44, and the cover body II 11 is provided with a mounting hole 45.

[0094] A protrusion 46 is formed on the surface of the valve core shaft 39, and a shaft section I 47 located on one side of the protrusion 46 passes through the shaft hole I 42 of the valve seat 38, and a shaft section II 48 on the other side passes through the shaft hole II 43 of the valve seat 38.

[0095] The coil spring 40 is sleeved on the shaft section I 47, the protrusion 46 of the valve core shaft 39 and the inner edge of the shaft hole II 43 abut against each other, and the coil spring 40 abuts between the protrusion 46 and the inner edge of the shaft hole I 42.

[0096] The valve 12 is installed in the installation hole 45 of the cover body Ⅱ11. When the real-time pressure value in the pressure container 2 is greater than the pressure threshold A, the pressure of the pressure container 2 drives the valve core shaft 39 to compress the coil spring 40, and the shaft section Ⅰ47 of the valve core shaft 39 extends into the limiting hole 44 of the cover body Ⅰ10, and the cover body Ⅰ10 and the cover body Ⅱ11 are locked with each other in the circumferential direction.

[0097] As another embodiment of the present invention, Fig.10 As shown, a test device for simulating the impact of the pressure change environment on fish during the submersion process of the cage is provided in this embodiment. In its structure: the bottom end cover 9 is also provided with an on / off switchable pipeline component 49, and is interconnected with the cavity of the pressure vessel 2. The on / off switching of the pipeline component 49 can be controlled, and the pressure in the pressure vessel 2 can be instantly adjusted by timely releasing the pressure in the pressure vessel 2, thereby further protecting the safety of the test equipment and operators.

[0098] As a third embodiment of the present invention, Fig.11 As shown, a test device for simulating the impact of the pressure change environment on fish during the submersion process of a cage is provided in this embodiment, and its structure also includes a visual system 50 for real-time monitoring of the interior of the pressure vessel 2. The above-mentioned visual system 50 can further improve the automation and intelligence level of the test device. At the same time, using the visual system 50 instead of naked eye observation can maximize the observation accuracy and avoid the influence of erroneous observation information caused by fatigued naked eyes on the test results.

[0099] The specific design principles of all the above embodiments are as follows:

[0100] (1) Pressure control simulation: Pressure vessel 2 simulates the cage culture environment. External compressed gas enters pressure vessel 2 to indirectly control the water pressure in the container. By adjusting the pressure size and change rate, the water pressure changes at different speeds when the cage dives or floats can be simulated, thereby studying the physiological adaptability of fish.

[0101] (2) Wave and current load simulation: The external influence of wave load is simulated by shaking the pressure vessel 2 with a certain amplitude, and the water flow is simulated by circulating flow to observe the survival status and adaptability of fish under wave and current load. This can help evaluate the fish's tolerance to waves and optimize the design of aquaculture cages to reduce the impact of waves on fish.

[0102] (3) Design of safety pressure vessel 2: In its structure, the top cover 7 adopts a split design of cover bodies Ⅰ10 and Ⅱ. The cover body Ⅱ11 and the bottom cover 9 are connected and locked with the cover body Ⅱ11, the cylinder 8 and the bottom cover 9 through flanges. The cover body Ⅰ10 blocks the nut 13 that locks the cover body Ⅱ11, the cylinder 8 and the bottom cover 9. The cover body Ⅰ10 and the cover body Ⅱ11 of the concentric structure are locked with each other in the axial direction and can only be unlocked by the rotation of the cover body Ⅰ10 and / or the cover body Ⅱ11. The cover body Ⅰ10 and the cover body Ⅱ11 are locked with each other in the circumferential direction through the valve 12. Therefore, the pressure can only be released first, that is, waiting for the actual pressure in the pressure vessel 2 to be released. When the pressure value is ≤ the pressure threshold A (safety pressure value), after the valve 12 that synchronously locks the cover body Ⅰ10 and the cover body Ⅱ11 in the circumferential direction switches the state, the cover body Ⅰ10 can be opened by rotating the cover body Ⅰ10 and / or the cover body Ⅱ11, and then the nut 13 that locks the cover body Ⅱ11, the cylinder body 8 and the bottom end cover 9 can be removed. At this time, the cover body Ⅱ11, the cylinder body 8 and the bottom end cover 9 that were originally flange-locked can be opened. Therefore, the present invention can completely prevent the situation of "opening the cover body without releasing the pressure in the pressure vessel 2 (that is, reducing it to below the safety pressure value) to cause dangerous hidden dangers" from occurring.

[0103] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present invention.

Claims

1. A test device for simulating the effect of pressure change environment on fish during the submergence of a cage, characterized in that: include: Bracket; A pressure vessel, which is provided with a joint I for external compressed gas to enter the chamber, a joint II for external high-pressure water to enter the chamber, a one-way valve, and a pressure sensor for converting the water pressure signal in the chamber into an electrical signal output; the water in the chamber flows out through the one-way valve and forms a water flow environment with a set flow direction in the chamber; and, a power and transmission device, which drives the pressure vessel to perform sloshing motion; Among them, the pressure vessel and the power and transmission devices are all installed on the working table of the bracket; The pressure vessel comprises: a top cover, a cylinder and a bottom cover; the joint I, the one-way valve and the pressure sensor are all installed on the bottom cover; the cylinder is a vertical structure; The top cover comprises a cover body I, a cover body II and a valve; the connector II is installed on the cover body II; Wherein, the cover body II and the bottom end cover are respectively installed on the ports of the cylinder body, and the cover body II and the bottom end cover are flange-connected, and the cover body I blocks and locks the nuts of the cover body II, the cylinder body and the bottom end cover; The cover body I and the cover body II of the concentric structure are locked to each other in the axial direction through a buckle structure, and are unlocked by the self-rotation of the cover body I and / or the cover body II; The cover body I and the cover body II are locked to each other in the circumferential direction by a valve, and are unlocked when the real-time pressure value in the pressure container is ≤ the pressure threshold value A, and the pressure threshold value A is a preset value; The power and transmission device comprises: a pair of screw slider mechanisms I, a transmission pulley assembly, a stepper motor or servo motor I, a pair of swing rod assemblies, a connecting rod, a screw slider mechanism II, a stepper motor or servo motor II and an articulated seat; The screw rod Ⅰ of each screw rod slider mechanism Ⅰ is mounted on the work surface of the bracket through the fixing seat Ⅰ, and the screw rod Ⅰ extends in the horizontal direction A. The slider Ⅰ is mounted on the screw rod Ⅰ and moves linearly in the extension direction of the screw rod Ⅰ; The stepper motor or servo motor I is installed on the working table of the bracket and is connected to the screw rod I of a pair of screw rod slider mechanisms I through a transmission pulley assembly; The screw rod II of the screw rod slider mechanism II is installed on the fixed seat II and extends in the ray direction of the work surface of the bracket. The hinge seat is installed on the bracket. The fixed seat II of the screw rod slider mechanism II is hinged to the hinge seat. The screw rod II performs circular motion around the vertical axis of the aforementioned horizontal direction A. The slider II is installed on the screw rod II and performs linear motion in the extension direction of the screw rod II. The stepper motor or servo motor II is installed on the fixed seat II and is connected to the screw rod II in transmission. Each swing rod assembly comprises a support rod and a swing rod, the support rod is mounted on the bracket, the swing rod is hinged to the support rod and moves in a circle around a vertical axis in the aforementioned horizontal direction A; One end portion of a pair of swing rods is connected to each other through a connecting rod, and the connecting rod is mounted on the slider II; The pressure vessel is located in the middle of a pair of screw slider mechanisms Ⅰ, the bottom end cover of the pressure vessel is hinged to the slider Ⅰ of the pair of screw slider mechanisms Ⅰ through a pair of hinge shafts Ⅰ, and the cover body Ⅱ of the pressure vessel is hinged to the other end of the pair of swing rods through a pair of hinge shafts Ⅱ; The stepper motor or servo motor Ⅰ drives the pressure vessel to perform reciprocating linear displacement in the horizontal direction A through the screw slider mechanism Ⅰ, and the synchronous screw slider mechanism Ⅱ drives a pair of rocker arms to perform reciprocating circular motion through the stepper motor or servo motor Ⅱ, thereby driving the pressure vessel to perform reciprocating circular motion around the vertical axis of the aforementioned horizontal direction A.

2. A test device for simulating the effect of pressure change environment on fish during the submergence of a cage according to claim 1, characterized in that At least the cylinder is transparent.

3. A test device for simulating the effect of pressure change environment on fish during the submergence of a cage according to claim 1, characterized in that The specific installation structure of the cover body II and the bottom end cover on the port of the cylinder is: The surfaces of the cover body II and the bottom end cover facing the cylinder are both provided with annular grooves, and the ports on both sides of the cylinder are respectively inserted into the corresponding annular grooves and wedged tightly to each other.

4. A test device for simulating the effect of pressure change environment on fish during the submergence of a cage according to claim 1, characterized in that The specific structure of the flange connection between the cover body II and the bottom end cover is as follows: The cover body II and the bottom end cover are both provided with through holes, which are evenly distributed around their respective peripheries; Bolts are evenly distributed on the outer ring of the cylinder, and the bolts pass through the through holes on the bottom end cover and the cover body II in sequence and are then locked by nuts.

5. The test device for simulating the effect of pressure change environment on fish during the cage submergence process according to claim 1 is characterized in that The buckle structure of the cover body I and the cover body II is specifically as follows: The side of the cover body II is provided with female buckles, which are evenly distributed in the circumferential direction. The side of the cover body I is provided with male buckles, which are evenly distributed in the circumferential direction. The buckling state of the male buckle and the female buckle is switched by the rotation of the cover body I and / or the cover body II.

6. The test device for simulating the effect of pressure change environment on fish during the submergence of a cage according to claim 1, characterized in that The specific structure of the cover body I and the cover body II being locked to each other in the circumferential direction through the valve is as follows: The valve comprises: a valve seat, a valve core shaft and a coil spring; The valve seat is provided with a cavity, and an axial hole I and an axial hole II independently penetrating the cavity, a limiting hole is provided on the cover body I, and a mounting hole is provided on the cover body II. A protrusion is formed on the surface of the valve core shaft, and the shaft section I on one side of the protrusion passes through the shaft hole I of the valve seat, and the shaft section II on the other side passes through the shaft hole II of the valve seat. The spiral spring bushing is mounted on the shaft section I, the protrusion of the valve core shaft and the inner edge of the shaft hole II abut against each other, and the spiral spring abuts between the protrusion and the inner edge of the shaft hole I. The valve is installed in the mounting hole of cover body II. When the real-time pressure value in the pressure vessel is greater than the pressure threshold A, the pressure of the pressure vessel drives the valve core shaft to compress the coil spring, and the shaft section I of the valve core shaft extends into the limiting hole of cover body I, and cover body I and cover body II are locked with each other in the circumferential direction.

7. A test device for simulating the effect of pressure change environment on fish during the cage submergence process according to claim 1, characterized in that: The bottom end cover is provided with an on / off switchable pipeline assembly, and is interconnected with the cavity of the pressure container.

8. The test device for simulating the effect of pressure change environment on fish during the cage submergence process according to claim 1 is characterized by: Also included is a vision system for real-time monitoring of the interior of the pressure vessel.

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