CN111579227A - Test equipment for testing mechanical property of deep water net cage floating frame structure - Google Patents
Test equipment for testing mechanical property of deep water net cage floating frame structure Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention discloses a test device for testing the mechanical property of a deep water net cage floating frame structure, which comprises a protective frame, a lifting force application device, a mechanical sensor, a force application frame, a clamp frame and a computer, wherein an experimental space is arranged in the protective frame, the inner bottom surface of the experimental space is a horizontal working surface, the clamp frame is fixedly arranged on the horizontal working surface and is used for fixing two ends of the floating frame structure to be tested, the floating frame structure comprises an I-shaped frame and a floating pipe, the lifting force application device is arranged at the upper end of the protective frame, and a force application frame is arranged on the lifting force application device, the mechanical sensor is arranged between the force application frame and the lower movable end of the lifting force application device, the computer receives a load signal output by the mechanical sensor, and the computer also receives a lifting displacement signal of the lifting force application device. The invention can be used for testing the mechanical property of the net cage floating frame structure.
Description
Technical Field
The invention relates to a test device for testing the mechanical property of a deep water net cage floating frame structure.
Background
High Density Polyethylene (HDPE) gravity type net cage has advantages such as high cost performance, breed capacity are big, and in order to alleviate the continuous deep sea area development of inshore environment pressure, the net cage system probably yields the deformation because can not bear the too big load of wave environment, and plastic yield phenomenon is still serious when especially facing superstrong typhoon invasion.
The floating frame structure is a key stressed component of the net cage system, and the failure of the floating frame structure can cause the damage of the whole net cage system, so that the design and application of test equipment for measuring the mechanical property of the floating frame structure have important theoretical value and application value.
In the process of offshore cage operation, under the action of continuous wave load, plastic damage of a floating frame structure of the cage usually occurs at a mooring position, a welding seam position and a connecting position of a floating pipe and an I-shaped frame, the mechanical property of the cage is greatly influenced by the connecting arrangement of the I-shaped frame and double floating pipes, and the actual structural strength of the floating frame structure can be obtained by testing the strength of a connecting structure assembled by the I-shaped frame and the floating pipes.
At present, the mechanical property test is only carried out on the floating pipe material in the floating frame structure of the net cage, and the floating pipe can be processed into a standard sample during the test. In the process of processing the integral floating pipe into a standard sample, scratches, twisting depressions and notches are easily generated on the surface of the floating pipe, which cause stress concentration to influence the test result. And the above test can only test the floating pipe, but can not test the mechanical property of the floating frame structure which is not machined. And the plastic deformation of the net cage can not be simulated visually almost because the fluid-solid coupling and the hydrodynamic force test are difficult to meet the similar rigidity condition.
The operation net cage system bears the influence of wave dynamic buffer force for a long time, and particularly, the structural fatigue under the action of high-amplitude and high-frequency alternating stress in a typhoon period needs to be evaluated and calibrated.
Disclosure of Invention
The invention aims to solve the technical problem of providing a test device for testing the mechanical property of a deep-water net cage floating frame structure, which can be used for carrying out a mechanical property test on the net cage floating frame structure.
To solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a test equipment for testing deep water box with a net floats frame structural mechanics performance which characterized in that: the device comprises a protective frame, a lifting force application device, a mechanical sensor, a force application frame, a clamp frame and a computer, wherein an experimental space is arranged in the protective frame, the inner bottom surface of the experimental space is a horizontal working surface, the clamp frame is fixedly arranged on the horizontal working surface, the position of the clamp frame is adjustable, the clamp frame is used for fixing two ends of a floating frame structure to be tested and containing an I-shaped frame and a floating pipe, the lifting force application device is arranged at the upper end of the protective frame and can be adjusted front and back, left and right, the force application frame is arranged at the lower movable end of the lifting force application device, the lifting force application device drives the force application frame to do lifting motion so as to apply downward loading force, upward loading force or up and down vibration force to the I-shaped frame position, the floating pipe position or the welding position of the floating frame structure through the force application frame, the mechanical sensor is arranged between the force application frame and the lower movable end of the lifting force application device and, the computer receives the load signal output by the mechanical sensor and also receives the lifting displacement signal of the lifting force application device.
The test equipment also comprises a cross beam, wherein the cross beam can be adjusted and installed on the upper side of the protection frame in a front-back mode through front-back sliding rollers, and the lifting force application device can be adjusted and installed on the cross beam in a left-right mode through left-right sliding rollers. The invention realizes the fore-and-aft adjustment through the cross beam and the fore-and-aft sliding roller on the cross beam.
Wherein, lift force application device includes the cylinder, but the cylinder through the side-to-side adjustment install in the upper end of protection frame, the cylinder is vertical downwards. The invention realizes left-right adjustment through the left-right sliding idler wheels.
Furthermore, a plurality of fixing threaded holes are formed in the horizontal working face, a plurality of pressing rods are arranged on the horizontal working face, the pressing rods are fixed to the fixing threaded holes through fixing bolts, and one end portions of the pressing rods are pressed on the lower frame of the clamp frame. The position of the clamp frame can be adjusted by arranging the pressure lever.
The fixture frame comprises two fixing frames, and the two fixing frames are used for fixing two ends of the floating pipe respectively.
Furthermore, a fixing groove is arranged on the fixing frame, and the end part of the floating pipe is fixed in the fixing groove through a rope or a clamp.
Furthermore, a protective net is arranged at the periphery of the protective frame.
In order to ensure the safety of operation, the lifting force application device is provided with a power switch for controlling the starting of the lifting force application device, a lower moving switch for controlling the descending of the lifting force application device and an upper moving switch for controlling the ascending of the lifting force application device, wherein the power switches are respectively arranged in association with the lower moving switch and the upper moving switch, the lifting force application device can be controlled to descend only by simultaneously switching on the power switch and the lower moving switch, and the lifting force application device can be controlled to ascend only by simultaneously switching on the power switch and the upper moving switch.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the two ends of the floating frame structure are fixed by the fixture frame, downward loading force, upward loading force or vertical vibration force is applied to the I-shaped frame, the floating pipe or the welding position of the floating frame structure by the force applying frame, and the measured force signal is transmitted to the computer by the mechanical sensor, so that the mechanical property data of the net cage floating frame structure such as bending, compression and stretching of the net cage floating frame can be obtained through testing, and the test of the mechanical property of the net cage floating frame structure can be directly carried out. The test equipment provided by the invention has a great promotion effect on further design optimization of the net cage.
2. The invention carries out strength test aiming at the integral structure, the local structure or the welding structure of the floating pipe and the I-shaped frame of the floating frame structure, and can carry out mechanical property measurement on net cage floating frame structures with different structural forms.
3. The clamp frames are adopted to fasten two ends of the floating frame structure, the force application frame applies a load force to simulate wave load and anchor mooring to the corresponding position of the floating frame, and the mooring force of the floating frame in operation in the sea wave environment can be accurately simulated.
Drawings
Fig. 1 is a schematic perspective view of a first embodiment of the present invention;
FIG. 2 is a schematic view of an assembly structure of a cross beam, an air cylinder, a mechanical sensor and a force application frame in the first embodiment of the invention;
fig. 3 is a schematic structural diagram of a fixing frame fixing floating frame structure according to a first embodiment of the present invention;
FIG. 4 is a graph of compressive displacement versus compressive load obtained during a test conducted with a loading force applied to a floating pipe in accordance with an embodiment of the present invention;
FIG. 5 is a graph of compressive stress versus compressive strain obtained during a test conducted with a loading force applied to a float tube in accordance with an embodiment of the present invention;
FIG. 6 is a graph of compressive stress versus compressive strain obtained during a test conducted with a load force applied to an I-frame in accordance with an embodiment of the present invention;
FIG. 7 is a graph of compressive stress versus compressive strain obtained during a test conducted with a loading force applied to a welded buoyant tube in accordance with an embodiment of the present invention;
FIG. 8 is a graph showing a compressive vibration position and a compressive vibration load obtained when an up-and-down vibration force is applied to a floating pipe according to an embodiment of the present invention;
FIG. 9 is a graph of compressive displacement versus compressive load obtained by testing the present invention for a loading force applied to a floating pipe after adding a vertical beam to the middle region of the floating pipe;
fig. 10 is a schematic structural view of a force applying frame according to a second embodiment of the present invention.
The reference numerals in the drawings mean:
1-a protective frame; 1.1-frame runner; 1.2-horizontal working plane; 1.3-experimental space; 1.4-fixing the threaded hole; 2-a cylinder; 2.1-lower active end; 3-a mechanical sensor; 4-sliding rollers back and forth; 5-a cross beam; 5.1-beam runner; 5.2-beam locking plate; 6-sliding rollers left and right; 7-a protective net; 8, fixing a frame; 8.1-lower frame of the fixed mount; 8.2-fixed groove; 9-a caster; 10-fixing feet; 11-a pressure bar; 12-a computer; 13-a compressor; 14-gas path; 15-power switch; 16-lower moving switch; 17-an up-move switch; 18-a floating pipe; 19-an I-shaped frame; 20-beam locking bolts; 21-a cylinder locking bolt; 22-a force application frame; 23-fixing ring.
Detailed Description
The invention is further described below with reference to examples.
The first embodiment is as follows:
fig. 1 shows a testing apparatus for testing the mechanical property of a deep water net cage floating frame structure according to the first embodiment, which includes a protection frame 1, a lifting force application device, a mechanical sensor 3, a force application frame 22, a clamp frame, a cross beam 5 and a computer 12.
The protection frame 1 is a cubic frame formed by connecting aluminum profiles and fastening screws, the truckles 9 and the fixing feet 10 are arranged at the bottom of the cubic frame, the truckles 9 facilitate the movement of the protection frame 1, and the fixing feet 10 are supported on the ground when needing to be fixed. The inside experimental space 1.3 that is located of protection frame 1 openly is uncovered, and all the other trilateral protection network 7 that are equipped with, safety when the protection network 7 has guaranteed the experiment.
The inner bottom surface of the experimental space 1.3 is paved by a bottom plate to form a horizontal working surface 1.2, the horizontal working surface 1.2 has a certain distance with the ground, the fixture frame is fixedly arranged on the horizontal working surface 1.2, the position of the fixture frame 8 is adjustable, and the fixture frame 8 is used for fixing two ends of a floating frame structure which comprises an I-shaped frame 19 and a floating pipe 18 to be tested. The fixture frame comprises two fixing frames 8, and the specific fixing structure is as follows: be equipped with a plurality of fixed screw hole 1.4 on horizontal working face 1.2, fixed screw hole 1.4 is according to the matrix arrangement, correspond every mount 8 and be equipped with six depression bars 11 respectively on horizontal working face 1.2, depression bar 11 passes through fixing bolt to be fixed on fixed screw hole 1.4, and a tip of depression bar 11 presses on the lower frame 8.1 of mount 8, through fixing depression bar 11 on different screw holes, can fix mount 8 in different positions to adapt to the floating frame structure of not equidimension specification. As shown in fig. 3, a fixing groove 8.2 is provided on the fixing frame 8, fixing rings 23 are provided on both sides of the fixing groove 8.2, the end portion of the floating pipe 18 is fixed in the fixing groove 8.2 by a rope or a clamp, and both ends of the rope or the clamp can be tied to the fixing rings 23.
As shown in fig. 1 and 2, two ends of the beam 5 are respectively provided with three front and rear sliding rollers 4 in the vertical direction and two front and rear sliding rollers 4 in the horizontal direction, the upper surfaces and the inner side surfaces of two upper frames of the protection frame 1 are respectively and correspondingly provided with frame sliding grooves 1.1, the front and rear sliding rollers 4 are correspondingly matched and arranged on the frame sliding grooves 1.1, so that the beam 5 can slide front and rear, beam locking plates 5.2 are arranged below the two ends of the beam 5, the beam locking plates 5.2 are positioned below the upper frames of the protection frame 1, beam locking bolts 20 are connected to the beam locking plates 5.2 through threads, and when the beam 5 is required to be fixed, the beam 5 can be locked by screwing the beam locking bolts 20 upwards.
The lifting force application device of the present embodiment includes a cylinder 2, and of course, a compressor 13 and an air passage 14 connecting the compressor 13 and the cylinder 2 are provided corresponding to the cylinder 2. The cylinder 2 is vertically downward and can be controlled and adjusted and installed on the upper end of the protection frame 1, and the specific installation structure is as follows: as shown in fig. 2, a transverse sliding space is arranged in the middle of the cross beam 5, the sliding space is penetrated through the upper part of the cylinder 2, four left and right sliding rollers 6 are arranged on the upper part of the cylinder 2, the four left and right sliding rollers 6 are distributed on the front and rear sides two by two and are positioned above the cross beam 5, transverse cross beam sliding grooves 5.1 are arranged on the upper side of the cross beam 5 corresponding to the left and right sliding rollers 6 on the front and rear sides respectively, and the left and right sliding rollers 6 are correspondingly installed on the cross beam sliding grooves 5.1, so that the left and right sliding adjustment of the cylinder 2 is realized. The upper portion of cylinder 2 still is equipped with the cylinder lockplate, and the cylinder lockplate is located the below of crossbeam 5, and threaded connection has cylinder locking bolt 21 on the cylinder lockplate, when needs fixed cylinder 2, upwards screws up cylinder locking bolt 21, can lock cylinder 2.
The setting of adjusting around can realizing the cylinder 2 through crossbeam 5, front and back slide roller 4 and left and right slide roller 6 in this embodiment.
The force application frame 22 is a transverse rectangular frame, the middle part of the force application frame 22 is connected with the lower movable end 2.1 of the cylinder 2, and the cylinder 2 drives the force application frame 22 to move up and down. The mechanical sensor 3 is arranged between the force application frame 22 and the lower movable end 2.1 of the cylinder and is used for measuring the force acting on the force application frame 22.
The mechanical sensor 3 is electrically connected with the computer 12, and the computer 12 receives the load signal output by the mechanical sensor 3. A displacement sensor is arranged in the cylinder 2, and is electrically connected with the computer 12 in a conventional configuration, and the computer 12 also receives a lifting displacement signal of the cylinder 2.
The present embodiment is provided with a power switch 15 for controlling the actuation of the cylinder 2, a lower moving switch 16 for controlling the lowering of the cylinder, and an upper moving switch 17 for controlling the raising of the cylinder, the power switch 15 is respectively provided in association with the lower moving switch 16 and the upper moving switch 17, the lowering of the cylinder 2 can be controlled only by simultaneously turning on the power switch 15 and the lower moving switch 16, and the raising of the cylinder 2 can be controlled only by simultaneously turning on the power switch 15 and the upper moving switch 17, thereby ensuring the safety in operation. When the power switch 15 is turned on and the moving switch 16 or the up-moving switch 17 is pressed for a long time, the cylinder 2 is continuously lowered or raised, and when the moving switch 16 or the up-moving switch 17 is pressed for a short time, the cylinder 2 is intermittently lowered or raised.
As shown in fig. 1 and fig. 3, the floating frame structure including two floating pipes 18 and two i-shaped frames 19 is tested in the present embodiment, wherein the floating pipe 18 is made of High Density Polyethylene (HDPE), the two i-shaped frames 19 are respectively connected to two ends of the two floating pipes 18, and during the test, the positions of the two fixing frames 8 are adjusted to respectively fix two ends of the two floating pipes 18 on the two fixing frames 8.
The transverse beam 5 is adjusted forwards and backwards, the air cylinder 2 is adjusted leftwards and rightwards, the force applying frame 22 is located above one I-shaped frame 19, the transverse beam 5 and the air cylinder 2 are locked, and downward load force can be applied to the position of the I-shaped frame 19 by controlling the air cylinder 2 to descend. The transverse beam 5 is adjusted forwards and backwards, the cylinder 2 is adjusted leftwards and rightwards, the force applying frame 22 is positioned above the floating pipe 18, and downward load force can be applied to the position of the floating pipe 18 by controlling the descending of the cylinder 2. The force application frame 22 is lowered to the lower part of the floating frame structure, the force application frame 22 is adjusted to the lower part of the I-shaped frame 19 or the lower part of the floating pipe 18, the cylinder 2 is controlled to ascend, and then upward load force can be applied to the I-shaped frame 19 or the floating pipe 18. When the I-shaped frame 19 descends to the lower part of the floating frame structure for testing, the fatigue test can be carried out by controlling the cylinder 2 to do up-and-down cyclic motion so as to apply up-and-down vibration force. The mechanical property of the floating frame structure can be tested through the process.
The floating frame structure is fixed at two ends, can be stressed at three points during testing, is used for performing bending stress test on the floating frame structure when downward load force is applied through the stress application frame 22, is destructive force which is most easily received by the floating frame structure in the deep sea use process, and can simulate the damage condition of mooring force to the floating frame structure in a strong typhoon environment. Tensile testing of the floating frame structure is performed while applying an upward loading force through the force applying frame 22.
Under the action of anchor rope mooring and wave load, the net cage floating frame structure mainly bears bending load, the damage of the bending load to the offshore operation floating frame is the most main influence factor, the embodiment realizes the simulation of the stress and damage process of the net cage floating frame structure in a laboratory 1:1, and can truly reflect the ultimate strength of the I-shaped frame and floating pipe connecting structure of the mooring load in the wave operation environment.
The stress mode of the test equipment is flexible, the position of a net cage floating frame sample can be conveniently changed, the test equipment can be changed into a compression I-shaped frame test, and the effect of mooring at the I-shaped frame on the net cage floating frame structure is simulated.
By respectively carrying out tests on the floating frame structures provided with the I-shaped frames 19 with different numbers or different intervals, the protection effect of the I-shaped frames 19 on the floating frame structures can be accurately researched.
Similarly, the floating frame structure including the welded floating pipe 18 can be tested, and a loading force is applied to the welding position, so that the mechanical property of the welded floating frame structure can be tested.
Because the clamp frame 8 and the cylinder 2 can be adjusted, the floating frame structure of the floating pipe 18 with different pipe diameters and wall thicknesses can be tested.
In the test, the floating frame structure is converted from elastic deformation into plastic deformation by continuously applying load force, the connecting position of the floating pipe 18 and the I-shaped frame 19 has a fracture phenomenon, and the damage process is consistent with the process that when waves are large, the anchoring part bears the maximum load to cause the failure of the net cage floating frame structure, so that the damage process of the net cage floating frame structure under the condition of bearing extreme sea conditions is intuitively and accurately analyzed by a simplified method. And in the test, the test is stopped when the floating frame structure is obviously yielded or broken through observation of a camera or human eyes, and the relationship and the curve graph among the force, the displacement and the time are obtained through data obtained by a sensor.
The yield and fracture rules of the net cage floating frame structure made of HDPE material in different key structures are shown in figures 4-8, which are graphs on the compression force obtained by tests, and the mechanical property analysis of the floating frame structure can be carried out on the graphs. Of course, a graph in tensile force can also be obtained, and the mechanical properties of the floating structure can also be analyzed.
Fig. 4 is a graph showing the compressive displacement and the compressive load obtained in the test in which the load force is directly applied to the floating pipe in the present embodiment, and fig. 5 is a graph showing the compressive stress and the compressive strain obtained in the test in which the load force is applied to the floating pipe in the present embodiment. When the floating pipe with the specific specification for the floating frame structure is tested, the compression load is increased according to a certain proportion along with the continuous increase of the compression displacement, then the acceleration rate is reduced, and the compression load is gradually reduced after reaching the maximum value, and the curve reflects the detailed process that the floating pipe on the floating frame structure is sequentially subjected to elastic deformation, yield stress, stress strengthening, plastic stretching and finally fracture failure.
Similarly, the following figures also show the failure process of other key components of the floating frame structure, and the failure rule of each component mainly comprises an elastic stage, yield strength reaching, stress softening, stress strengthening, plastic elongation and fracture. But the failure process is different to determine the mechanical properties of the components.
As shown in fig. 6, which is a graph of the compressive stress and the compressive strain obtained in the test in which the load force is applied to the i-shaped frame according to the present embodiment, the elongation at break is significantly increased in the stage from the plastic deformation to the break, as compared with fig. 5 and 7.
Fig. 7 is a graph showing the compressive stress and the compressive strain obtained when a load force is applied to the welded floating pipe in the present embodiment for a test, and it can be seen from fig. 7 that the strength of the welded floating pipe is significantly lower than that of the box mother pipe, and the elongation at break of the welded floating pipe is also lower than that of the mother pipe, which indicates that the toughness of the welded floating pipe is reduced. The fracture elongation and the yield strength of the welding floating pipe of the floating frame structure are both smaller than those of the mother pipe, and the elastic modulus is larger, so that the welding floating pipe is one of dangerous areas for the operation of the net cage floating frame, thereby giving the optimization suggestion of the net cage floating frame and reducing welding joints.
According to the vibration fatigue action process of the long-term wave dynamic load on the net cage, the stress state of the net cage floating frame structure, the anchoring and the netting is constantly changed due to the fact that the rigidity changes suddenly when the net cage floating frame structure is contacted with or separated from the anchoring and the netting due to the wave action, the net cage floating frame structure mainly bears bending load and vibrates in a reciprocating mode, and the outer side of the bent floating frame structure bears alternating compression force which is the same as the stress form in the test process. Fig. 8 is a graph of the compressive vibration position and the compressive vibration load obtained when the vertical vibration force is applied to the floating pipe in the embodiment, and the fatigue response of the floating frame structure under the condition of the alternating load is measured, so that the bearing failure condition of the floating frame structure under the sea condition for a long time can be determined. According to the appointed amplitude and frequency, the fatigue aging performance of the net cage floating frame structure can be obtained through a vibration test. The test support is provided for the optimized design of the net cage structure under the conditions of bearing extreme waves for a long time and mooring.
According to the mechanical property test results of the above figures, the floating frame structure can be optimally designed and subjected to a comparative test, a vertical beam is added in the middle area in the floating pipe, the mechanical property corresponding to that shown in fig. 9 is obtained, the maximum tensile force is increased, and the strength is increased.
Example two:
the experimental facility of the second embodiment is different from the second embodiment in that the force application frame 22, as shown in fig. 10, is replaced by a circular frame 22, and the force area and the form of the floating frame structure of the net cage can be adjusted by replacing the circular frame 22 with the circular frame.
Of course, the shape and structure of the urging frame 22 may be other structures capable of urging the floating frame structure.
The above-described embodiments of the present invention are not intended to limit the scope of the present invention, and the embodiments of the present invention are not limited thereto, and various other modifications, substitutions and alterations can be made to the above-described structure of the present invention without departing from the basic technical concept of the present invention as described above, according to the common technical knowledge and conventional means in the field of the present invention.
Claims (8)
1. The utility model provides a test equipment for testing deep water box with a net floats frame structural mechanics performance which characterized in that: the device comprises a protective frame, a lifting force application device, a mechanical sensor, a force application frame, a clamp frame and a computer, wherein an experimental space is arranged in the protective frame, the inner bottom surface of the experimental space is a horizontal working surface, the clamp frame is fixedly arranged on the horizontal working surface, the position of the clamp frame is adjustable, the clamp frame is used for fixing two ends of a floating frame structure to be tested and comprising an I-shaped frame and a floating pipe, the lifting force application device is arranged at the upper end of the protective frame and can be adjusted front and back and left and right, the force application frame is arranged at the lower movable end of the lifting force application device, the lifting force application device drives the force application frame to perform lifting motion so as to apply downward load force, upward load force or vertical vibration force to the I-shaped frame position, the floating pipe position or the welding position of the floating frame structure through the force application frame, the mechanical sensor is arranged between the force application frame and the lower movable end of the lifting force application device and used for measuring the force acting on the force application frame, the computer receives a load signal output by the mechanical sensor, and the computer also receives a lifting displacement signal of the lifting force application device.
2. The test equipment for testing the mechanical property of the deepwater net cage floating frame structure according to claim 1, is characterized in that: the test equipment further comprises a cross beam, the cross beam can be installed on the upper side of the protection frame in a front-back adjusting mode through front-back sliding idler wheels, and the lifting force application device can be installed on the cross beam in a left-right adjusting mode through left-right sliding idler wheels.
3. The test equipment for testing the mechanical property of the deepwater net cage floating frame structure according to claim 1, is characterized in that: the lifting force application device comprises an air cylinder, the air cylinder is installed at the upper end of the protection frame in a left-right adjusting mode through a left-right sliding roller, and the air cylinder is vertically downward.
4. The test equipment for testing the mechanical property of the deepwater net cage floating frame structure according to claim 1, is characterized in that: the fixture comprises a fixture frame, a horizontal working surface and a plurality of fixing threaded holes, wherein the horizontal working surface is provided with a plurality of press rods, the press rods are fixed on the fixing threaded holes through fixing bolts, and one end parts of the press rods are pressed on a lower frame of the fixture frame.
5. The test equipment for testing the mechanical property of the deepwater net cage floating frame structure according to claim 1, is characterized in that: the fixture frame comprises two fixing frames, and the two fixing frames are respectively used for fixing two ends of the floating pipe.
6. The test equipment for testing the mechanical property of the deepwater net cage floating frame structure according to claim 5, is characterized in that: the fixing frame is provided with a fixing groove, and the end part of the floating pipe is fixed in the fixing groove through a rope or a clamp.
7. The test equipment for testing the mechanical property of the deepwater net cage floating frame structure according to claim 1, is characterized in that: and protective nets are arranged on the periphery of the protective frame.
8. The test equipment for testing the mechanical property of the deepwater net cage floating frame structure according to claim 1, is characterized in that: the lifting force application device is provided with a power switch for controlling the starting of the lifting force application device, a lower moving switch for controlling the descending of the lifting force application device and an upper moving switch for controlling the ascending of the lifting force application device, wherein the power switch is respectively associated with the lower moving switch and the upper moving switch, and is only switched on simultaneously.
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| CN202010405276.3A CN111579227B (en) | 2020-05-13 | 2020-05-13 | Test equipment for testing mechanical property of deep water net cage floating frame structure |
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| CN202010405276.3A CN111579227B (en) | 2020-05-13 | 2020-05-13 | Test equipment for testing mechanical property of deep water net cage floating frame structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112772501A (en) * | 2021-02-01 | 2021-05-11 | 海南昌江元道养殖有限公司 | Deep-sea net cage for golden pomfret culture and use method thereof |
| CN112903243A (en) * | 2021-01-25 | 2021-06-04 | 浙江大学 | Modal analysis-based net cage state detection method in marine environment |
| CN113925007A (en) * | 2021-10-29 | 2022-01-14 | 山东大学 | Gravity type net cage design method based on balance weight and cable distribution evaluation |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10267812A (en) * | 1997-03-28 | 1998-10-09 | Ishikawajima Harima Heavy Ind Co Ltd | Device for testing four-point bending of piping |
| CN101135886A (en) * | 2007-08-31 | 2008-03-05 | 无锡华科机械设备有限公司 | Hanging cradle controller for construction using single-phase electric power |
| CN101907547A (en) * | 2010-07-05 | 2010-12-08 | 清华大学 | Two-shaft compression test equipment |
| CN102109443A (en) * | 2010-12-24 | 2011-06-29 | 同济大学 | High-accuracy hydraulic repeated loading test device |
| CN102116720A (en) * | 2010-01-04 | 2011-07-06 | 中国科学院地质与地球物理研究所 | Rock mechanical test system capable of realizing frequency and amplitude-variable dynamic loading |
| CN102175513A (en) * | 2011-01-14 | 2011-09-07 | 天津大学 | Separable type deepwater seabed pipeline bending test system |
| CN102426133A (en) * | 2011-09-08 | 2012-04-25 | 湖南大学 | Device and method for loading axial forces and side forces onto structural member |
| CN103512805A (en) * | 2013-10-22 | 2014-01-15 | 安徽理工大学 | Pressurizing device for anchor rod pull-out test for simulating surrounding rock stress of anchoring body |
| CN104422614A (en) * | 2013-08-20 | 2015-03-18 | 天津市港石密封机械有限公司 | Pipeline external pressure test device |
| CN104455744A (en) * | 2014-11-28 | 2015-03-25 | 成都锦汇科技有限公司 | Petroleum pipeline supporting frame |
| CN104535433A (en) * | 2014-12-31 | 2015-04-22 | 中国石油天然气集团公司 | Full-size pipeline fatigue test operating platform |
| CN105252309A (en) * | 2015-11-16 | 2016-01-20 | 哈尔滨工业大学 | Clamp for water jet cutter to machine railway wagon swing bolster casting |
| CN105666187A (en) * | 2016-04-07 | 2016-06-15 | 镇江远大传动机械有限公司 | Clamping fixture for processing inner wall of engaging lug on weld yoke based on processing center |
| CN106610359A (en) * | 2015-10-23 | 2017-05-03 | 宝鸡石油钢管有限责任公司 | Four-point bending test device for pipe full-size evaluation |
| CN207074143U (en) * | 2017-04-01 | 2018-03-06 | 山东省产品质量检验研究院 | A kind of fire-fighting carries torque automatic test equipment with plough groove type pipe joint |
| CN207991972U (en) * | 2018-02-27 | 2018-10-19 | 江西鸿基管桩有限公司 | A kind of pile pile beam test device of real time monitoring |
| CN208214870U (en) * | 2018-05-10 | 2018-12-11 | 中山市欧楷照明科技有限公司 | A kind of removable clamp assembly |
| CN110411867A (en) * | 2019-08-02 | 2019-11-05 | 郑州大学 | A kind of novel and multifunctional concussion fracture experimental rig and application method |
| CN209919370U (en) * | 2019-04-25 | 2020-01-10 | 江苏国协机械科技有限公司 | Multi-process machining clamping tool for workpiece |
-
2020
- 2020-05-13 CN CN202010405276.3A patent/CN111579227B/en not_active Expired - Fee Related
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10267812A (en) * | 1997-03-28 | 1998-10-09 | Ishikawajima Harima Heavy Ind Co Ltd | Device for testing four-point bending of piping |
| CN101135886A (en) * | 2007-08-31 | 2008-03-05 | 无锡华科机械设备有限公司 | Hanging cradle controller for construction using single-phase electric power |
| CN102116720A (en) * | 2010-01-04 | 2011-07-06 | 中国科学院地质与地球物理研究所 | Rock mechanical test system capable of realizing frequency and amplitude-variable dynamic loading |
| CN101907547A (en) * | 2010-07-05 | 2010-12-08 | 清华大学 | Two-shaft compression test equipment |
| CN102109443A (en) * | 2010-12-24 | 2011-06-29 | 同济大学 | High-accuracy hydraulic repeated loading test device |
| CN102175513A (en) * | 2011-01-14 | 2011-09-07 | 天津大学 | Separable type deepwater seabed pipeline bending test system |
| CN102426133A (en) * | 2011-09-08 | 2012-04-25 | 湖南大学 | Device and method for loading axial forces and side forces onto structural member |
| CN104422614A (en) * | 2013-08-20 | 2015-03-18 | 天津市港石密封机械有限公司 | Pipeline external pressure test device |
| CN103512805A (en) * | 2013-10-22 | 2014-01-15 | 安徽理工大学 | Pressurizing device for anchor rod pull-out test for simulating surrounding rock stress of anchoring body |
| CN104455744A (en) * | 2014-11-28 | 2015-03-25 | 成都锦汇科技有限公司 | Petroleum pipeline supporting frame |
| CN104535433A (en) * | 2014-12-31 | 2015-04-22 | 中国石油天然气集团公司 | Full-size pipeline fatigue test operating platform |
| CN106610359A (en) * | 2015-10-23 | 2017-05-03 | 宝鸡石油钢管有限责任公司 | Four-point bending test device for pipe full-size evaluation |
| CN105252309A (en) * | 2015-11-16 | 2016-01-20 | 哈尔滨工业大学 | Clamp for water jet cutter to machine railway wagon swing bolster casting |
| CN105666187A (en) * | 2016-04-07 | 2016-06-15 | 镇江远大传动机械有限公司 | Clamping fixture for processing inner wall of engaging lug on weld yoke based on processing center |
| CN207074143U (en) * | 2017-04-01 | 2018-03-06 | 山东省产品质量检验研究院 | A kind of fire-fighting carries torque automatic test equipment with plough groove type pipe joint |
| CN207991972U (en) * | 2018-02-27 | 2018-10-19 | 江西鸿基管桩有限公司 | A kind of pile pile beam test device of real time monitoring |
| CN208214870U (en) * | 2018-05-10 | 2018-12-11 | 中山市欧楷照明科技有限公司 | A kind of removable clamp assembly |
| CN209919370U (en) * | 2019-04-25 | 2020-01-10 | 江苏国协机械科技有限公司 | Multi-process machining clamping tool for workpiece |
| CN110411867A (en) * | 2019-08-02 | 2019-11-05 | 郑州大学 | A kind of novel and multifunctional concussion fracture experimental rig and application method |
Non-Patent Citations (1)
| Title |
|---|
| 刘海阳 等: "《深水网箱浮架结构的失效及疲劳性能分析》", 《农业工程学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903243A (en) * | 2021-01-25 | 2021-06-04 | 浙江大学 | Modal analysis-based net cage state detection method in marine environment |
| CN112903243B (en) * | 2021-01-25 | 2022-04-15 | 浙江大学 | Modal analysis-based net cage state detection method in marine environment |
| CN112772501A (en) * | 2021-02-01 | 2021-05-11 | 海南昌江元道养殖有限公司 | Deep-sea net cage for golden pomfret culture and use method thereof |
| CN113925007A (en) * | 2021-10-29 | 2022-01-14 | 山东大学 | Gravity type net cage design method based on balance weight and cable distribution evaluation |
| CN113925007B (en) * | 2021-10-29 | 2023-10-17 | 山东大学 | Gravity type net cage design method based on balance weight and cable distribution evaluation |
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