Inductively coupled plastic coated steel cable for deep sea buoy and performance testing equipment and method thereof

Abstract

The application discloses an inductive coupling plastic-coated steel cable for a deep-sea buoy and a performance testing device and testing method thereof. The inductive coupling plastic-coated steel cable comprises a steel wire rope inner core, a plastic-coated insulation layer covering the outer surface of the steel wire rope inner core, a fiber braid layer covering the outer surface of the plastic-coated insulation layer, and a plastic-coated protective layer covering the outer surface of the fiber braid layer. The steel wire rope inner core is mixed twisted, and the structure of the steel wire rope inner core is 3x19. The steel wire rope inner core is twisted by three steel wire strands, and the twist direction of each steel wire strand is opposite to the twist direction of the steel wire rope inner core. The thickness of the plastic-coated insulation layer is 1-3 mm, the thickness of the fiber braid layer is 0.2-0.7 mm, and the thickness of the plastic-coated protective layer is 0.6-1.5 mm. The wear resistance and cutting resistance of the inductive coupling plastic-coated steel cable are greatly improved, the probability of being cut by a high-speed fishing line and a hook during a fishing operation is greatly reduced, and the probability of a short-circuit accident of the inductive coupling plastic-coated steel cable is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of deep-sea buoy mooring system, and particularly relates to an inductive coupling plastic-coated steel cable for a deep-sea buoy, a performance testing device and a testing method thereof. BACKGROUND

[0002] The ocean observation buoy is an automatic ocean observation station without manning, which can work all day and night in any harsh environment, and collect required data for ocean science research for a long time and continuously according to the prescribed requirements. Especially after more than 30 years of development, the deep-sea observation buoy has become the most important means for global sea-air interface flux and ocean profile observation, and its long-term, continuous and unmanned characteristics make it an important platform for climate system monitoring.

[0003] The anchoring system is an important part of the deep-sea ocean observation buoy, wherein the upper anchoring part of the anchoring system usually adopts a plastic-coated steel cable. The plastic-coated steel cable is used to keep the buoy carrying various observation devices moored on the anchor on the sea bottom. The plastic-coated steel cable is provided with various sensors from the sea surface to the part 700-1000 meters below, which measure the water temperature, flow direction, flow rate, salinity and depth of seawater, etc.

[0004] In order to collect the observation data of various sensors without lag, the deep-sea buoy usually uses an electromagnetic induction type communication device. The data observed by each sensor is transmitted to the data receiver of the water surface buoy in real time. Each sensor is provided with an electromagnetic modem to modulate the signal. Through the plastic-coated steel cable and seawater, a complete closed loop is formed to become a data communication channel. The electromagnetic coupling effect between the coupling coils of the underwater sensor and the water surface receiver is used to realize the data transmission from the underwater sensor to the water surface receiver. Therefore, the plastic-coated steel cable in the anchoring system of the deep-sea ocean observation buoy has three functions. The first function is the buoy mooring function. The second function is to suspend and fix the underwater sensor for measuring various indexes of seawater on the plastic-coated steel cable. The third function is to serve as a data communication channel between the underwater sensor and the water surface receiver.

[0005] The plastic-coated steel cable commonly used at present is composed of a non-torque steel wire rope and a plastic insulation layer coated outside the steel wire rope. The material of the steel wire rope, carbon steel, is a good conductor of electromagnetic waves, and the material of the external insulation layer, polyethylene or chlorinated polyethylene, can transmit magnetic flux.

[0006] However, the currently used plastic-coated steel cable usually has low wear resistance and cutting resistance, and accidents of abrasion and cutting caused by fishing gear may occur. In the actual working sea area of the deep-sea buoy, if the fishing boat carries out longline fishing and trolling fishing, the fishing line and hook thrown from the fishing boat and moving at high speed underwater will scratch or cut the surface plastic coating of the plastic-coated steel cable, so that the plastic-coated steel cable loses the insulation to seawater, resulting in short circuit of the closed loop formed by the plastic-coated steel cable and seawater, and loss of the function of the data transmission channel. SUMMARY

[0007] In view of this, some embodiments disclose an inductively coupled plastic coated steel cable for deep sea buoy, which comprises:

[0008] A steel wire rope core;

[0009] A plastic coated insulation layer coated on the outer surface of the steel wire rope core;

[0010] A fiber braid layer coated on the outer surface of the plastic coated insulation layer;

[0011] A plastic coated protective layer coated on the outer surface of the fiber braid layer;

[0012] Wherein, the steel wire rope core is a torsion-proof steel wire rope, the structure of the steel wire rope core is 3x19; the steel wire rope core is twisted by three steel wire strands, and the twist direction of each steel wire strand is opposite to the twist direction of the steel wire rope core;

[0013] Wherein, the thickness of the plastic coated insulation layer is 1-3mm, the thickness of the fiber braid layer is 0.2-0.7mm, and the thickness of the plastic coated protective layer is 0.6-1.5mm;

[0014] The manufacturing method of the inductively coupled plastic coated steel cable comprises:

[0015] Manufacturing the steel wire rope core;

[0016] The steel wire rope core enters the plastic coating die head of the first plastic coating machine, the plastic coated insulation layer raw material is melted by the screw extruder of the first plastic coating machine, then is extruded by the melt pipeline, enters the plastic coating die head, the steel wire rope core passes through the plastic coating die head, the molten plastic coated insulation layer raw material is coated on the outer surface of the steel wire rope core, and the plastic coated insulation layer is formed on the outer periphery of the steel wire rope core;

[0017] The steel wire rope core with the plastic coated insulation layer enters the braid winding machine, the fiber braid is wound on the outer periphery of the steel wire rope plastic coated insulation layer by the braid winding machine, and the fiber braid layer is formed;

[0018] The steel wire rope core coated with the plastic coated insulation layer and the fiber braid layer enters the plastic coating die head of the second plastic coating machine, the plastic coated protective layer raw material is melted by the screw extruder of the second plastic coating machine, then is extruded by the melt pipeline, enters the plastic coating die head, the steel wire rope core coated with the plastic coated insulation layer and the fiber braid layer passes through the plastic coating die head, the molten plastic coated protective layer raw material is coated on the outer surface of the fiber braid layer, and the plastic coated protective layer is formed on the outer periphery of the fiber braid layer of the steel wire rope;

[0019] The traction machine is rolled up to obtain the inductively coupled plastic coated steel cable composed of the steel wire rope core, the plastic coated insulation layer, the fiber braid layer and the plastic coated protective layer.

[0020] Some embodiments disclose an inductively coupled plastic-coated steel cable for deep-sea buoy, wherein the plastic coating is made of high-density polyethylene or chlorinated polyethylene.

[0021] Some embodiments disclose an inductively coupled plastic-coated steel cable for deep-sea buoy, wherein the fiber braid is made of ultra-high molecular weight polyethylene fiber braid.

[0022] Some embodiments disclose an inductively coupled plastic-coated steel cable for deep-sea buoy, wherein the ultra-high molecular weight polyethylene fiber braid is wound in the same direction as the twist direction of the steel strand, and the overlapping width of the ultra-high molecular weight polyethylene fiber braid is 1 / 3-2 / 3 of the width of the ultra-high molecular weight polyethylene fiber braid.

[0023] Some embodiments disclose an inductively coupled plastic-coated steel cable for deep-sea buoy, wherein the plastic protective layer is made of thermoplastic polyurethane, and the hardness is 70-80A.

[0024] Some embodiments disclose a performance testing device for testing the cutting resistance of an inductively coupled plastic-coated steel cable, the performance testing device comprising:

[0025] a support base comprising a vertical support rod and a horizontal support plate arranged at the top of the vertical support rod;

[0026] a fixed plate arranged on the horizontal support plate;

[0027] a driving assembly comprising a rotating wheel and a driving motor for driving the rotating wheel to rotate back and forth, the rotating wheel being arranged on the fixed plate, and the driving motor being arranged on the horizontal support plate;

[0028] a first travel inductive switch arranged on one side of the vertical support rod;

[0029] a second travel inductive switch arranged on the other side of the vertical support rod;

[0030] a test line arranged on the rotating wheel and configured to move back and forth under the driving of the rotating wheel;

[0031] two weights arranged to be connected to the two ends of the test line respectively, for applying tension to the test line;

[0032] a first inductive sheet arranged at the first end of the test line, for being matched with the first travel inductive switch to sense the position of the first end of the test line;

[0033] a second inductive sheet arranged at the second end of the test line, for being matched with the second travel inductive switch to sense the position of the second end of the test line;

[0034] a controller arranged on the support base, for controlling the driving assembly, the first travel inductive switch, and the second travel inductive switch;

[0035] During the test operation, the inductively coupled plastic-coated steel cable is fixed on the fixed plate and located below the test line, and the setting direction of the inductively coupled plastic-coated steel cable is parallel to the rotation axis of the rotating wheel; the weights at both ends of the test line naturally hang and apply a set force on the upper surface of the inductively coupled plastic-coated steel cable, the setting position of the first inductive sheet is lower than the first stroke inductive switch, and the setting position of the second inductive sheet is lower than the second stroke inductive switch; the driving motor drives the rotating wheel to reciprocate, the rotating wheel drives the test line to reciprocate on the upper surface of the inductively coupled plastic-coated steel cable, and the reciprocating cutting of the inductively coupled plastic-coated steel cable is realized; during the operation, the first inductive sheet cooperates with the first stroke inductive switch, and the second inductive sheet cooperates with the second stroke inductive switch, and the position of the test line reciprocating is controlled under the control of the controller.

[0036] Some embodiments disclose a performance test device, and the weight of the weight is 20% to 30% of the breaking strength of the test line.

[0037] Some embodiments disclose a performance test device, and the weight of the weight is 20% to 30% of the breaking strength of the test line.

[0038] Some embodiments disclose a performance test method, which uses the above performance test device to test the cutting resistance of the inductively coupled plastic-coated steel cable, comprising:

[0039] The inductively coupled plastic-coated steel cable is fixed on the fixed plate, and the setting direction of the fixed inductively coupled plastic-coated steel cable is parallel to the rotation axis of the rotating wheel;

[0040] The test line connected with the weights at both ends crosses the upper surface of the inductively coupled plastic-coated steel cable and winds around the rotating wheel for one turn, and the weights at both ends of the test line naturally hang and apply a set force on the upper surface of the inductively coupled plastic-coated steel cable;

[0041] The rotating wheel rotates forward, driving the test line to move forward on the upper surface of the inductively coupled plastic-coated steel cable, the first inductive sheet at the first end of the test line moves upward, and the second inductive sheet at the second end of the test line moves downward, when the first inductive sheet moves upward to the first stroke inductive switch, the first stroke inductive switch senses the first inductive sheet, and the control assembly controls the motor to drive the rotating wheel to reverse;

[0042] The rotating wheel reverses, driving the test line to move reversely on the upper surface of the inductively coupled plastic-coated steel cable, the first inductive sheet at the first end of the test line moves downward, and the second inductive sheet at the second end of the test line moves upward, when the second inductive sheet moves upward to the second stroke inductive switch, the second stroke inductive switch senses the second inductive sheet, and the control assembly controls the motor to drive the rotating wheel to rotate forward; one reciprocating cutting of the inductively coupled plastic-coated steel cable is realized;

[0043] Repeat the above reciprocating cutting step once, when the surface of the inductively coupled plastic-coated steel cable is damaged, stop the test, and record the number of reciprocating cuts.

[0044] The inductively coupled plastic-coated steel cable for deep-sea buoy disclosed by the embodiment of the present application greatly improves the wear resistance and cutting resistance of the plastic coating layer of the inductively coupled plastic-coated steel cable, greatly reduces the probability of the plastic-coated steel cable being cut by the high-speed moving fishing line and hook during fishing operations, and reduces the probability of short-circuit accidents of the inductively coupled plastic-coated steel cable; the performance testing equipment for the inductively coupled plastic-coated steel cable for deep-sea buoy disclosed by the embodiment of the present application cooperates the rotating wheel, the first inductive sheet and the first stroke inductive switch, the second inductive sheet and the second stroke inductive switch to drive the test line to reciprocally cut the surface of the inductively coupled plastic-coated steel cable, and the test process is simple and the test result is direct and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 FIG. 1 is a structural schematic diagram of the inductively coupled plastic-coated steel cable for deep-sea buoy according to the embodiment 1 of the present application;

[0046] Figure 2 FIG. 2 is a sectional view of the inductively coupled plastic-coated steel cable for deep-sea buoy according to the embodiment 1 of the present application;

[0047] Figure 3 FIG. 3 is a schematic diagram of the manufacturing method of the inductively coupled plastic-coated steel cable for deep-sea buoy according to the embodiment 1 of the present application;

[0048] Figure 4 FIG. 4 is a structural schematic diagram of the performance testing equipment for the inductively coupled plastic-coated steel cable for deep-sea buoy according to the embodiment 2 of the present application.

[0049] REFERENCE NUMERALS

[0050] 1 steel wire rope inner core 2 plastic-coated insulation layer

[0051] 3 fiber braid layer 4 plastic-coated protective layer

[0052] 5 traction machine 6 first plastic coating machine

[0053] 61 first plastic coating die 62 first screw extruder

[0054] 71, 72 cooling water tank 8 braid winding machine

[0055] 9 second plastic coating machine 91 second plastic coating die

[0056] 92 second screw extruder 100 inductively coupled plastic-coated steel cable

[0057] 200 support seat 201 vertical support rod

[0058] 202 horizontal support plate 203 fixed plate

[0059] 204 rotating wheel 205 gear box

[0060] 206 driving motor 207 test wire

[0061] 208 weight 209 first stroke inductive switch

[0062] 210 first inductive sheet 211 second stroke inductive switch

[0063] 212 second inductive sheet 213 controller

[0064] 214 cooling assembly DETAILED DESCRIPTION

[0065] The term "example" as used herein should not be interpreted as a preference or advantage over other embodiments. The performance index test in the embodiments of the present application is carried out by using the conventional test method in the art, unless otherwise specified. It should be understood that the terms described in the present application are only used to describe the specific embodiments, and are not used to limit the disclosure of the present application.

[0066] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the test methods and techniques not specifically mentioned in the present application refer to the experimental methods and techniques commonly used by one of ordinary skill in the art.

[0067] The terms "substantial" and "approximately" as used herein are used to describe small fluctuations. For example, they can mean less than or equal to ±5%, such as less than or equal to ±2%, such as less than or equal to ±1%, such as less than or equal to ±0.5%, such as less than or equal to ±0.2%, such as less than or equal to ±0.1%, such as less than or equal to ±0.05%. Numerical data expressed or presented in the form of a range herein is used for convenience and brevity only, and should be construed as flexibly to include not only the numerical values explicitly recited as the limits of the range, but also all individual numerical values or sub-ranges within the range. For example, a numerical range of "1-5%" should be interpreted to include not only the explicitly recited values of 1% and 5%, but also individual values and sub-ranges within the indicated range. Thus, within this numerical range, there are individual values such as 2%, 3.5%, and 4%, and sub-ranges such as 1-3%, 2-4%, and 3-5%, etc. This same principle applies to ranges that only recite one numerical value. In addition, such interpretation applies regardless of the width of the range or the nature of the characteristic being described.

[0068] In this document, including in the claims, the conjunctions, such as "comprise", "include", "have", "contain", "involve", "accommodate" and the like are to be understood as open-ended, i.e. as meaning "including but not limited to". Only the conjunctions "consist of" and "consist only of" are closed conjunctions.

[0069] For the purpose of better illustrating the present application, numerous specific details are given in the following detailed description. One skilled in the art will understand, however, that the application can be practiced without certain specific details, which are provided for the purpose of exemplification and not limitation.

[0070] The technical features disclosed in the embodiments of the present application can be combined arbitrarily without conflict, and the resulting technical solutions belong to the disclosure of the embodiments of the present application. It should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like described herein indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of describing the technical features and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application, unless the context contradicts. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance, unless the context contradicts. In this document, the rotation direction of the rotating wheel includes forward rotation and reverse rotation, wherein the forward rotation and the reverse rotation refer to two opposite rotation directions, and one direction is forward rotation and the other direction is reverse rotation.

[0071] In some embodiments, the inductively coupled plastic coated steel cable for deep sea buoy includes:

[0072] A steel wire rope inner core;

[0073] A plastic coated insulation layer wrapped on the outer surface of the steel wire rope inner core;

[0074] A fiber braid layer wrapped on the outer surface of the plastic coated insulation layer;

[0075] A plastic coated protective layer wrapped on the outer surface of the fiber braid layer;

[0076] The steel wire rope inner core is a special galvanized non-rotating steel wire rope with mixed twisting, and the structure of the steel wire rope inner core is 3*19; the steel wire rope inner core is twisted by three steel wire strands, each of which is twisted by three layers of steel wires, and the structure of the three layers of steel wires is 1+9+9, wherein the center layer of steel wires is 1, the middle layer of filling steel wires is 9, and the outer layer of steel wires is 9; the twisting direction of each steel wire strand is opposite to the twisting direction of the steel wire rope inner core; the structure of the steel wire rope is not easy to rotate under load, and has excellent anti-knotting performance;

[0077] The thickness of the plastic-coated insulation layer is 1-3 mm, the thickness of the fiber braid layer is 0.2-0.7 mm, and the thickness of the plastic-coated protective layer is 0.6-1.5 mm.

[0078] In some embodiments, the raw material of the plastic-coated insulation layer is high-density polyethylene or chlorinated polyethylene.

[0079] In some embodiments, the fiber braid is an ultra-high molecular weight polyethylene fiber braid.

[0080] In some embodiments, the winding direction of the ultra-high molecular weight polyethylene fiber braid is the same as the twisting direction of the steel wire strand, and the overlapping width of the ultra-high molecular weight polyethylene fiber braid during winding is 1 / 3-2 / 3 of the width of the ultra-high molecular weight polyethylene fiber braid.

[0081] In some embodiments, the raw material of the plastic-coated protective layer is thermoplastic polyurethane, and the hardness is 70-80A.

[0082] In some embodiments, the inductively coupled plastic-coated steel cable for deep-sea buoys is made by the following method:

[0083] The hot-dipped galvanized steel wire is used as the raw material, and is twisted and stranded by a strand machine and a stranding machine to obtain the steel wire rope inner core; the hot-dipped galvanized steel wire is A-grade galvanizing, which has excellent corrosion resistance;

[0084] Under the traction of the traction machine, the steel wire rope inner core successively passes through straightening and induction heating to enter the plasticizing die head of the first plasticizing machine, and the plasticizing raw material of high-density polyethylene prepared according to the formula is melted by the screw extruder of the first plasticizing machine, and then is extruded by the melt pipeline, and enters the plasticizing die head; when the steel wire rope inner core is pulled out through the plasticizing die head, the molten high-density polyethylene is coated on the outer surface of the steel wire rope inner core; the steel wire rope inner core coated with the molten high-density polyethylene is cooled through the cooling water tank, so that the high-density polyethylene is solidified, and a continuous and uniform plastic-coated insulation layer with a certain thickness is formed on the outer periphery of the steel wire rope inner core;

[0085] The steel wire rope core after the high-density polyethylene coating is continuously pulled by the traction machine, enters the braid winding machine, and the braid winding machine winds the ultra-high molecular weight polyethylene fiber braid on the outer periphery of the high-density polyethylene coating layer of the steel wire rope. The winding direction of the ultra-high molecular weight polyethylene fiber braid is consistent with the twisting direction of the three strands of the steel wire rope. The winding speed of the ultra-high molecular weight polyethylene braid and the moving speed of the steel wire rope are adjusted so that the wound ultra-high molecular weight polyethylene braid has at least one-third of the braid width overlap, and a continuous ultra-high molecular weight polyethylene fiber braid layer with a certain overlap is formed.

[0086] The steel wire rope core coated with the high-density polyethylene coating layer and the fiber braid layer is pulled by the traction machine, enters the coating die of the second coating machine, and the hot melt polyurethane coating raw material prepared according to the formula is melted by the screw extruder of the second coating machine, then is extruded through the melt pipeline, and enters the coating die. When the steel wire rope core coated with the high-density polyethylene coating layer and the fiber braid layer passes through the coating die, the molten hot melt polyurethane is coated on the outer surface of the fiber braid layer. The steel wire rope core coated with the molten hot melt polyurethane is cooled through the cooling water tank to solidify the hot melt polyurethane, and a continuous and uniform thickness coating protection layer is formed on the outer periphery of the ultra-high molecular weight polyethylene fiber braid layer of the steel wire rope.

[0087] The traction machine is wound to obtain an inductively coupled coated steel cable composed of a steel wire rope core, a high-density polyethylene coating layer, a fiber braid layer, and a coating protection layer.

[0088] In some embodiments, the performance test device for testing the cutting resistance of the inductively coupled coated steel cable comprises:

[0089] The support seat comprises a vertical support rod and a horizontal support plate arranged at the top of the vertical support rod;

[0090] The fixing plate is arranged on the horizontal support plate. The fixing plate is usually in the form of a rectangular structure. The inductively coupled coated steel cable is fixed on the fixing plate by a fixing clamp, and the rotating wheel is fixed on the fixing plate by a bolt;

[0091] The driving assembly comprises a rotating wheel and a driving motor for driving the rotating wheel to rotate back and forth. The rotating wheel is arranged on the fixing plate, and the driving motor is arranged on the horizontal support plate;

[0092] The first travel inductive switch is arranged on one side of the vertical support rod;

[0093] The second travel inductive switch is arranged on the other side of the vertical support rod. Usually, the first travel inductive switch and the second travel inductive switch are arranged on the opposite sides of the vertical support rod, so that the first inductive sheet at the first end of the test line is convenient for cooperating with the first travel inductive switch, and the second inductive sheet at the second end of the test line is convenient for cooperating with the second travel inductive switch;

[0094] The test line is arranged on the rotating wheel and is arranged to reciprocate under the driving of the rotating wheel. The test line can be a fishing line commonly used in fishing gear, such as a nylon fishing line, a polyethylene fiber fishing line or an ultra-high molecular weight polyethylene fiber fishing line.

[0095] The two weights are arranged to be connected to the two ends of the test line respectively and are used to apply tension to the test line. The weight of the weight is 20% to 30% of the breaking strength of the test line. Generally, the weight is arranged to be connected to the two ends of the test line, i.e. the first end and the second end of the test line, and the two weights connected to the first end and the second end are the same, so as to apply the same force to the two ends of the test line.

[0096] The first sensing sheet is arranged at the first end portion of the test line and is used to adapt to the first stroke sensing switch to sense the position of the first end portion of the test line. Generally, the area inside the first end of the test line close to the first end can be referred to as the first end portion. Generally, the first sensing sheet is arranged at the first end portion so that the first sensing sheet is located above the weight at the first end during the test operation.

[0097] The second sensing sheet is arranged at the second end portion of the test line and is used to adapt to the second stroke sensing switch to sense the position of the second end portion of the test line. Generally, the area inside the second end of the test line close to the second end can be referred to as the second end portion. Generally, the second sensing sheet is arranged at the second end portion so that the second sensing sheet is located above the weight at the second end during the test operation.

[0098] The controller is arranged on the support seat and is used to control the driving assembly, the first stroke sensing switch and the second stroke sensing switch.

[0099] During the test operation, the inductive coupling plastic-coated steel cable is arranged to be fixed on the fixed plate and is located below the test line. The arrangement direction of the inductive coupling plastic-coated steel cable is parallel to the rotation axis of the rotating wheel. The weights at the two ends of the test line naturally drop to apply a set force on the upper surface of the inductive coupling plastic-coated steel cable. Generally, the weight at one end of the test line naturally drops from the side of the inductive coupling plastic-coated steel cable, and the weight at the other end of the test line naturally drops from the side of the rotating wheel. The arrangement position of the first sensing sheet is lower than that of the first stroke sensing switch, and the arrangement position of the second sensing sheet is lower than that of the second stroke sensing switch. The driving motor drives the rotating wheel to reciprocate, the rotating wheel drives the test line to reciprocate on the upper surface of the inductive coupling plastic-coated steel cable, and the reciprocating cutting of the inductive coupling plastic-coated steel cable is realized. During the operation, the first sensing sheet cooperates with the first stroke sensing switch, and the second sensing sheet cooperates with the second stroke sensing switch. The position of the reciprocating movement of the test line is controlled under the control of the controller.

[0100] As an optional implementation, the first stroke sensing switch and the second stroke sensing switch are both photoelectric sensing switches. When the rotating wheel drives the test line to move, the test line drives the first sensing sheet to a position in which the first sensing sheet is in response with the first stroke sensing switch. The first stroke sensing switch transmits a sensing signal to the controller. The controller controls the rotating wheel to drive the test line to move reversely. The test line drives the second sensing sheet to a position in which the second sensing sheet is in response with the second stroke sensing switch. The second stroke sensing switch transmits a sensing signal to the controller. The controller controls the rotating wheel to reverse the direction of the test line, thereby completing a reciprocating cutting action.

[0101] In some embodiments, the length of the test line and the setting positions of the first sensing sheet and the second sensing sheet can be determined according to the setting positions of the first stroke sensing switch and the second stroke sensing switch. The first sensing sheet can be in response with the first stroke sensing switch or the second sensing sheet can be in response with the second stroke sensing switch after the test line moves a certain distance. The first sensing sheet and the second sensing sheet are set to control the rotating direction and the rotating time of the rotating wheel, thereby realizing the reciprocating cutting of the test line on the inductively coupled plastic-coated steel cable.

[0102] In some embodiments, the diameter of the rotating wheel is less than or equal to the diameter of the inductively coupled plastic-coated steel cable. When the test line reciprocally cuts the surface of the inductively coupled plastic-coated steel cable, the test line and the reciprocally cutting position of the inductively coupled plastic-coated steel cable are constant, and the force of the test line on the surface of the inductively coupled plastic-coated steel cable is constant downward.

[0103] In some embodiments, the driving motor is connected with the rotating wheel through a gearbox, which is used to control the rotating speed of the rotating wheel.

[0104] In some embodiments, a cooling assembly is arranged above the fixed plate, which is used to cool the reciprocally cutting test point of the inductively coupled plastic-coated steel cable. Generally, the cooling assembly drips cooling water on the reciprocally cutting test point to cool the reciprocally cutting test point during the test.

[0105] In some embodiments, a cutting resistance performance test method for testing the cutting resistance performance of the inductively coupled plastic-coated steel cable by using the performance test device described above includes:

[0106] The inductively coupled plastic-coated steel cable is arranged and fixed on the fixed plate, and the arrangement direction of the fixed inductively coupled plastic-coated steel cable is parallel to the rotating shaft of the rotating wheel.

[0107] A test lead with weights attached to both ends passes over the upper surface of the inductively coupled plastic-coated steel cable and winds around the rotating wheel once. The weights at both ends of the test lead hang naturally, applying a predetermined force to the upper surface of the inductively coupled plastic-coated steel cable. Typically, the test lead winds around the rotating wheel once, allowing the wheel to apply sufficient driving force to the test lead to overcome the tension applied by the weights, causing the test lead to move synchronously and perform frictional cutting on the inductively coupled cable. The arrangement of the test lead on the rotating wheel can also be varied to meet the reciprocating testing requirements of this embodiment of the invention.

[0108] When the rotating wheel rotates forward, it drives the test lead to move forward on the surface of the inductively coupled plastic-coated steel cable. The first sensing element at the first end of the test lead moves upward, and the second sensing element at the second end of the test lead moves downward. When the first sensing element moves upward to the first stroke induction switch, the first stroke induction switch senses the first sensing element, and the control component controls the motor to drive the rotating wheel to reverse.

[0109] The rotating wheel reverses, causing the test lead to move in the opposite direction on the surface of the inductively coupled plastic-coated steel cable. The first sensing piece at the first end of the test lead moves downward, and the second sensing piece at the second end of the test lead moves upward. When the second sensing piece moves upward to the second stroke induction switch, the second stroke induction switch senses the second sensing piece, and the control component controls the motor to drive the rotating wheel to rotate forward; thus realizing one reciprocating cut of the inductively coupled plastic-coated steel cable.

[0110] Repeat the above reciprocating cutting steps. When the surface of the inductively coupled plastic-coated steel cable is damaged, stop the test and record the number of reciprocating cuts.

[0111] The technical details are further illustrated below with reference to the embodiments.

[0112] Example 1

[0113] Figure 1 This is a schematic diagram of the inductive coupling plastic-coated steel cable for deep-sea buoys disclosed in Example 1; Figure 2 This is a cross-sectional view of the inductive coupling plastic-coated steel cable for deep-sea buoys disclosed in Example 1; Figure 3 This is a schematic diagram of the manufacturing method of the inductively coupled plastic-coated steel cable for deep-sea buoys disclosed in Example 1.

[0114] like Figure 1 , Figure 2 As shown, the inductive coupling plastic-coated steel cable for deep-sea buoys includes an innermost steel wire rope core 1, a plastic-coated insulation layer 2 covering the outer surface of the steel wire rope core, a fiber webbing layer 3 covering the outer surface of the plastic-coated insulation layer 2, and a plastic-coated protective layer 4 covering the outer surface of the fiber webbing layer 3; wherein, the steel wire rope core 1 is composed of three steel wire strands 11.

[0115] like Figure 3As shown, the method for making the inductively coupled plastic coated steel cable with a diameter of 16mm for deep-sea buoy is as follows:

[0116] The steel wire rope inner core 1 is obtained by stranding and plying the hot galvanized steel wire through the stranding machine and the plying machine;

[0117] The steel wire rope inner core 1 is pulled by the traction machine 5, and sequentially passes through the straightening, induction heating, and the first plastic coating die head 61 of the first plastic coating machine 6. The high-density polyethylene plastic coating raw material prepared according to the formula is melted by the first screw extruder 62 of the first plastic coating machine 6, and then is extruded through the melt pipeline. When the steel wire rope inner core 1 passes through the first plastic coating die head 61, the molten high-density polyethylene is coated on the outer surface of the steel wire rope inner core 1. The steel wire rope inner core 1 coated with the molten high-density polyethylene is cooled through the cooling water tank 71, so that the high-density polyethylene is solidified, and a continuous plastic coating insulation layer 2 with a thickness of 1.5mm is formed on the outer periphery of the steel wire rope inner core 1. The plastic coating raw material is high-density polyethylene particles, and the melt index is 0.89g / 10min.

[0118] The steel wire rope inner core 1 coated with the plastic coating insulation layer 2 is continuously pulled by the traction machine 5, and enters the tape winding machine 8. The tape winding machine 8 winds the ultra-high molecular weight polyethylene fiber tape on the outer periphery of the plastic coating insulation layer 2, and the winding direction is consistent with the twisting direction of the three strands of the steel wire rope. The winding speed of the ultra-high molecular weight polyethylene tape and the moving speed of the steel wire rope are adjusted, so that the wound ultra-high molecular weight polyethylene tape has a half-tape-width overlap, and a continuous ultra-high molecular weight polyethylene fiber tape layer 3 with a certain overlap is formed. The thickness of the ultra-high molecular weight polyethylene fiber tape is 0.3mm, and the thickness of the wound layer is 0.6mm.

[0119] The steel wire rope inner core 1 coated with the plastic coating insulation layer and the fiber tape layer is pulled by the traction machine 5, and enters the second plastic coating die head 91 of the second plastic coating machine 9. The thermoplastic polyurethane plastic coating raw material prepared according to the formula is melted by the second screw extruder 92 of the second plastic coating machine 9, and then is extruded through the melt pipeline. When the steel wire rope inner core 1 coated with the plastic coating insulation layer and the fiber tape layer passes through the second plastic coating die head 91, the molten thermoplastic polyurethane is coated on the outer surface of the fiber tape layer 3. The steel wire rope inner core 1 coated with the molten thermoplastic polyurethane is cooled through the cooling water tank 72, so that the thermoplastic polyurethane is solidified, and a continuous plastic coating protective layer 4 with a thickness of 0.9mm is formed on the outer periphery of the ultra-high molecular weight polyethylene fiber tape layer of the steel wire rope.

[0120] The traction machine 5 is wound to obtain the inductively coupled plastic coated steel cable with a diameter of 16mm.

[0121] Example 2

[0122] Figure 4 Structure diagram of performance testing equipment for inductive coupling plastic-coated steel cable for deep-sea buoy disclosed in embodiment 2.

[0123] As shown in Figure 4 , the performance testing equipment for inductive coupling plastic-coated steel cable for deep-sea buoy comprises:

[0124] The support base 200 comprises a vertical support rod 201 and a horizontal support plate 202 arranged at the top of the vertical support rod 201; a fixed plate 203 arranged on the horizontal support plate 202; a rotating wheel 204 arranged on the fixed plate 203; an inductive coupling plastic-coated steel cable 100 arranged on the left side of the rotating wheel 204; a cooling assembly 214 arranged above the inductive coupling plastic-coated steel cable 100; a gearbox 205 arranged on the right side of the horizontal support plate 202 and connected with the rotating wheel 204; a driving motor 206 arranged on the right side of the horizontal support plate 202 and connected with the gearbox 205; a test line 207 arranged along a direction perpendicular to the axial direction of the inductive coupling plastic-coated steel cable 100 and hung on the inductive coupling plastic-coated steel cable 100, and a section close to the rotating wheel 204 is wound around the rotating wheel 204 for one turn; one end of the test line 207 naturally drops from the left side of the inductive coupling plastic-coated steel cable 100, and the other end of the test line 207 naturally drops from the right side of the rotating wheel 204; the two ends of the test line 207 are respectively located on the left and right sides of the vertical support rod 201; a weight 208 is arranged at the two ends of the test line 207 to make the test line 207 in a tension state; a first stroke induction switch 209 is installed on the left side of the vertical support rod 201; a first induction sheet 210 is installed on the left end of the test line 207 and matched with the first stroke induction switch 209; a second stroke induction switch 211 is installed on the right side of the vertical support rod 201 and opposite to the first stroke induction switch 209; a second induction sheet 212 is installed on the right end of the test line 207 and matched with the second stroke induction switch 211; a controller 213 is matched and arranged on the right bottom of the horizontal support plate 202 and used for controlling the rotating wheel 204, the first stroke induction switch 209 and the second stroke induction switch 211. When the test line 207 is hung on the inductive coupling plastic-coated steel cable 100, the two ends of the test line 207 drop, the first induction sheet 210 and the second induction sheet 212 arranged at the two ends of the test line 207 are at the same horizontal height, and the horizontal height is respectively lower than the installation height of the first stroke induction switch 209 and the second stroke induction switch 211.

[0125] The test method for the cutting resistance of the inductive coupling plastic-coated steel cable for deep-sea buoy is realized by the above-mentioned equipment, comprising:

[0126] The inductive coupling plastic coated steel cable 100 with a diameter of 16 mm prepared by the embodiment 1 is fixed on the fixed plate 203, and the axial direction of the fixed inductive coupling plastic coated steel cable 100 is parallel to the axial direction of the rotating wheel 204;

[0127] The test line 207 connected with the 40 kg weight 208 is selected to cross the upper surface of the inductive coupling plastic coated steel cable 100, and the test line 207 applies a set force to the upper surface of the inductive coupling plastic coated steel cable 100 under the action of the weight 208; wherein the test line 207 is a 150 denier nylon fishing line;

[0128] The controller 213 controls the driving motor 206 to drive the rotating wheel 204 to rotate forward, and the rotating wheel 204 drives the test line 207 to move forward on the upper surface of the inductive coupling plastic coated steel cable 100, the test line 207 drives the first inductive sheet 210 arranged at the first end of the test line 207 to move upward, and drives the second inductive sheet 212 arranged at the second end of the test line 207 to move downward, and the test line 207 moves forward by a certain distance, the first inductive sheet 210 is inducted with the first stroke inductive switch 209, and the first stroke inductive switch 209 transmits the inductive signal to the controller 213;

[0129] The controller 213 controls the driving motor 206 to drive the rotating wheel 204 to rotate reversely, and the rotating wheel 204 drives the test line 207 to move reversely on the upper surface of the inductive coupling plastic coated steel cable 100, the test line 207 drives the first inductive sheet 210 arranged at the first end of the test line 207 to move downward, and drives the second inductive sheet 212 arranged at the second end of the test line 207 to move upward, and the test line 207 moves reversely by a certain distance, the second inductive sheet 212 is inducted with the second stroke inductive switch 211, and the second stroke inductive switch 211 transmits the inductive signal to the controller 213, to realize one-way reciprocating cutting of the inductive coupling plastic coated steel cable 100;

[0130] During the test, the cooling assembly 214 drops cooling water to the reciprocating cutting test point to cool the reciprocating cutting test point; the above-mentioned reciprocating cutting steps are repeated, when the surface of the inductive coupling plastic coated steel cable is damaged, the test is stopped, and the reciprocating cutting frequency is recorded.

[0131] Comparative Example 1

[0132] The inductive coupling plastic coated steel cable with a diameter of 16 mm prepared by the conventional method in the art is used in the above-mentioned cutting resistance performance test recorded in the embodiment 2; wherein the inductive coupling plastic coated steel cable provided by the comparative example 1 has a high-density polyethylene coating layer with a thickness of 3 mm, and the steel wire rope core is the same as the core disclosed in the embodiment 1 of the present application.

[0133] The conventional preparation method of the inductive coupling plastic coated steel cable in the art includes:

[0134] The galvanized steel wire is A-grade galvanizing, and has excellent corrosion resistance;

[0135] The steel wire rope core is pulled by the traction machine, and sequentially passes through straightening and induction heating to enter the plastic coating die head of the plastic coating machine. The high-density polyethylene plastic coating raw material prepared according to the formula is melted by the screw extruder of the plastic coating machine, and then is extruded through the melt pipeline. When the steel wire rope core passes through the plastic coating die head and is pulled out, the molten high-density polyethylene is coated on the outer surface of the steel wire rope core. The steel wire rope core coated with the molten high-density polyethylene is cooled through the cooling water tank, so that the high-density polyethylene is solidified, and a continuous plastic coating layer with a uniform thickness of 3 mm is formed on the outer periphery of the steel wire rope core. The high-density polyethylene plastic coating raw material has a melt index of 0.89 g / 10 min.

[0136] The traction machine is wound to obtain the induction coupling plastic coated steel cable composed of the steel wire rope core and the high-density polyethylene coating layer.

[0137] Table 1 below is the cutting resistance test results of the induction coupling plastic coated steel cable of Example 1 and the induction coupling plastic coated steel cable of Comparative Example 1.

[0138] Table 1 is the cutting resistance test results of the induction coupling plastic coated steel cable of Example 1 and Comparative Example 1.

[0139]

[0140] As shown by the test results, compared with the commonly used induction coupling plastic coated steel cable, the cutting resistance of the induction coupling plastic coated steel cable disclosed in the embodiment of the present application is greatly improved.

[0141] The induction coupling plastic coated steel cable for deep-sea buoy disclosed in the embodiment of the present application has greatly improved wear resistance and cutting resistance of the plastic coating layer, and the probability of the plastic coated steel cable being cut by the high-speed moving fishing line and hook during fishing operation is greatly reduced, thereby reducing the probability of short-circuit accident of the induction coupling plastic coated steel cable. The performance test equipment for the induction coupling plastic coated steel cable for deep-sea buoy disclosed in the embodiment of the present application cooperates the rotating wheel, the first induction sheet and the first travel induction switch, the second induction sheet and the second travel induction switch to drive the test line to reciprocally cut the surface of the induction coupling plastic coated steel cable, and the test process is simple, and the test result is direct and reliable.

[0142] The technical details disclosed in the technical solutions and embodiments of the present application are only exemplary to illustrate the inventive concept of the present application, and do not constitute a limitation on the technical solutions of the present application. Any conventional change, replacement or combination of the technical details disclosed in the embodiments of the present application has the same inventive concept as the present application, and is within the protection scope of the claims of the present application.

Claims

1. A performance testing apparatus for testing the cut resistance of an inductively coupled jacketed steel cable, comprising: a cutting device; a cable support; a cable guide; a cable tensioner; a cable cutter; and a cable cutter controller. The performance testing device comprises: a support base comprising a vertical support rod and a horizontal support plate arranged at the top of the vertical support rod; a fixing plate arranged on the horizontal support plate; a driving assembly comprising a rotating wheel and a driving motor for driving the rotating wheel to rotate back and forth, wherein the rotating wheel is arranged on the fixing plate and the driving motor is arranged on the horizontal support plate; a first stroke sensing switch arranged on one side of the vertical support rod; a second stroke sensing switch arranged on the other side of the vertical support rod; a test wire arranged on the rotating wheel and arranged to move back and forth under the driving of the rotating wheel; two weights arranged to be connected with the two ends of the test wire respectively and used for applying tension to the test wire; a first sensing sheet arranged at the first end of the test wire and used for being matched with the first stroke sensing switch to sense the position of the first end of the test wire; a second sensing sheet arranged at the second end of the test wire and used for being matched with the second stroke sensing switch to sense the position of the second end of the test wire; a controller arranged on the support base and used for controlling the driving assembly, the first stroke sensing switch and the second stroke sensing switch; during the test operation, the inductively coupled plastic-coated steel cable is arranged on the fixing plate and below the test wire, the arrangement direction of the inductively coupled plastic-coated steel cable is parallel to the rotating shaft of the rotating wheel, the weights at the two ends of the test wire naturally drop to apply a set force on the upper surface of the inductively coupled plastic-coated steel cable, the arrangement position of the first sensing sheet is lower than the first stroke sensing switch, and the arrangement position of the second sensing sheet is lower than the second stroke sensing switch; the driving motor drives the rotating wheel to rotate back and forth, the rotating wheel drives the test wire to move back and forth on the upper surface of the inductively coupled plastic-coated steel cable, and the inductively coupled plastic-coated steel cable is cut back and forth; during the operation, the first sensing sheet is matched with the first stroke sensing switch, the second sensing sheet is matched with the second stroke sensing switch, and the position of the test wire moving back and forth is controlled under the control of the controller.

2. The performance testing apparatus of claim 1, wherein, The weight of the weight is 20% to 30% of the breaking strength of the test wire.

3. The performance testing apparatus of claim 2, wherein, a cooling assembly arranged above the fixing plate and used for cooling the test point of the inductively coupled plastic-coated steel cable cut back and forth.

4. A performance test method for testing the cut resistance of an inductively coupled jacketed steel cable using the performance test apparatus of claim 3, characterized by, comprises: the inductively coupled plastic-coated steel cable is arranged on the fixing plate and the arrangement direction of the inductively coupled plastic-coated steel cable is parallel to the rotating shaft of the rotating wheel; the test wire with the weights connected at the two ends is arranged to cross the upper surface of the inductively coupled plastic-coated steel cable and to be wound around the rotating wheel for one turn, and the weights at the two ends of the test wire naturally drop to apply a set force on the upper surface of the inductively coupled plastic-coated steel cable; the rotating wheel is driven to rotate forward to drive the test wire to move forward on the upper surface of the inductively coupled plastic-coated steel cable, the first sensing sheet at the first end of the test wire moves upward, the second sensing sheet at the second end of the test wire moves downward, when the first sensing sheet moves upward to the first stroke sensing switch, the first stroke sensing switch senses the first sensing sheet, and the control assembly controls the motor to drive the rotating wheel to rotate reversely; The rotating wheel reverses, drives the test line to move reversely on the surface of the inductively coupled plastic-coated steel cable, the first inductive sheet at the first end of the test line moves downward, the second inductive sheet at the second end of the test line moves upward, when the second inductive sheet moves upward to the second stroke inductive switch, the second stroke inductive switch senses the second inductive sheet, the control assembly controls the motor to drive the rotating wheel to rotate forward; the inductively coupled plastic-coated steel cable is cut once reciprocatingly; The above-mentioned step of once reciprocating cutting is repeated, when the surface of the inductively coupled plastic-coated steel cable appears to be damaged, the test is stopped, and the reciprocating cutting number is recorded.

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