Tension detection device for deep sea cable

Abstract

A tension detection device for a deep sea cable belongs to the technical field of detection equipment and comprises a fixed plate, a pulley, a force sensitive resistor disc, a shaft rod, a sealing navigation socket, a hook, a bearing, a steel wire rope, a sealing cover, an O-shaped ring, a sealing navigation plug, a lifting seat, a storage battery, a voltage display meter and a resistor. The fixing plate, the pulley, the force sensitive resistor disc, the shaft rod, the sealing navigation socket, the hook, the bearing, the steel wire rope, the sealing cover, the O-shaped ring, the sealing navigation plug, the lifting seat, the storage battery, the voltage display meter and the resistor are installed together. The device has good sealing performance and high detection sensitivity, during detection, the weight of a cable acts upwards on the pulley in the middle of the front end of the fixed plate, so that the middle shaft rod detects that the stress can be transmitted to the force-sensitive resistor through elasticity under the action of the upward stress, the resistance value of the force-sensitive resistor is changed, the reading of the voltmeter is changed, and the detection accuracy is improved. A worker on a steamship can visually know the magnitude of the tension applied to the cable through the voltmeter.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a tension testing device for deep-sea cables. Background Technology

[0002] Submarine cables (including fiber optic cables and electrical cables, etc.) are communication or power supply facilities laid on the seabed. Fiber optic cables have the following advantages: (1) large information capacity and long transmission distance, up to 4.7GB of data transmission capacity; (2) because submarine fiber optic cables are laid on the seabed, seawater can effectively isolate external interference, reduce signal attenuation, and ensure the stability and security of transmission. In addition, the seabed environment reduces electromagnetic interference and improves the confidentiality of signals; (3) submarine cables do not require digging tunnels or using supports, and the construction speed is relatively fast. This construction method also reduces land use and construction costs; (4) once the submarine cable is laid, it is less affected by the natural environment, has lower maintenance costs, and a longer service life, reducing the need for frequent maintenance.

[0003] After submarine cables are laid, their tension must be neither too high nor too low to ensure stable and reliable operation. Excessive tension increases the risk of breakage due to overstretching, while insufficient tension wastes cable space (requiring a relatively long cable length). Currently, during construction and maintenance, workers typically enter the seabed in diving suits and visually assess cable tension using underwater lighting or cameras. This method is susceptible to limitations due to poor underwater lighting and the experience of the workers, making accurate assessments and increasing the risk of misjudgment. Therefore, providing a device that can directly and accurately detect submarine cable tension is essential. Utility Model Content

[0004] To overcome the shortcomings of existing submarine cable tension testing methods, which lack suitable testing equipment and suffer from the drawbacks described in the background, this utility model provides a deep-sea cable tension testing device with good sealing performance and high detection sensitivity. Under the joint action of relevant mechanisms, when two hooks are respectively hooked to both ends of the submarine cable testing position, personnel on ships and other vessels can obtain real-time, intuitive, and accurate information about the detected submarine cable tension data.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A tension detection device for deep-sea cables includes a fixed plate, pulleys, a force-sensitive resistor, shafts, a sealed aviation socket, a hook, a bearing, a wire rope, a sealing cover, an O-ring, a sealed aviation plug, a lifting seat, a battery, a voltmeter, and a resistor. Multiple shafts and pulleys are included, each with a mounting groove at its rear end. A bearing is fixedly installed in each mounting groove. The front ends of multiple shafts are fixedly installed within the inner rings of multiple bearings. Two shafts are fixedly installed at the upper front of the left and right ends of the fixed plate. The fixed plate has a fixing groove in its middle. A third shaft has a hollow middle section, and its rear end is sealed and fixedly installed in the front end of the fixing groove. An elastic column is fixedly fitted inside the third shaft with an interference fit. The elastic column has fixed seats on both sides of its middle section and a mounting seat on its rear side. A fixed cylinder is fixedly installed at the rear end of the fixing groove. The fixed seat at the rear end of the elastic column is fixedly installed at the rear end of the fixing groove on the fixed plate. A force-sensitive resistor is also included. The device is fixedly installed on the upper end of the mounting base of the elastic column; the inner rear side of the fixed cylinder has an internal thread, the front end of the sealing cover has an external thread, the front end of the sealing cover and the rear end of the fixed cylinder are threaded together, and an O-ring is fixedly installed between the front side of the sealing cover and the rear end of the fixed cylinder; the lower end of the sealing socket is fixedly installed on the fixed cylinder, and the two terminals of the sealing socket are respectively connected to the two terminals of the force-sensitive resistor via wires; the sealing plug is inserted into the socket hole of the sealing socket; the lower end of the lifting seat is fixedly installed on the fixed plate, and the upper middle part of the lifting seat has a fixing hole, which is fixedly connected to the lower end of the lifting wire rope of the winch; the wire rope is wrapped around the lower end of the groove of the middle pulley, and the two ends of the wire rope are respectively wrapped around the upper ends of the grooves of the pulleys at the left and right ends of the fixed plate; there are at least two hooks, and the upper ends of the two hooks are respectively fixedly installed together with the two ends of the wire rope; the battery, voltmeter, and resistor are installed in the component box.

[0007] Furthermore, the bearing is a ceramic bearing, and a water seal ring is installed between the inner and outer rings of the bearing.

[0008] Furthermore, the outer diameters of the multiple pulleys are the same, and the pulleys at the left and right ends are on the same horizontal plane.

[0009] Furthermore, the fixing plate, pulley, shaft, fixing cylinder, and sealing cover are made of titanium alloy, the hook, wire rope, and lifting seat are made of steel, and the elastic column is made of aluminum alloy.

[0010] Furthermore, the positive terminal of the battery and one end of the force-sensitive resistor are connected by a wire, and the other end of the force-sensitive resistor is connected to one end of the resistor and the positive power input terminal of the voltmeter, while the other end of the resistor is connected to the negative power input terminal of the voltmeter.

[0011] Compared with existing technologies, the advantages of this invention are: This invention has excellent sealing performance and high detection sensitivity. During testing, a winch on the ship lowers the invention to the seabed in the testing area. Workers, wearing diving suits and positioned at the testing location, hook the two hooks onto the two ends of the seabed cable. The winch lifts the cable to a certain height, separating it from the seabed. The cable's weight then acts upwards on the pulley at the front center of the fixed plate. The central axle detects the upward stress and elastically transmits the stress to a force-sensitive resistor. The resistance of the force-sensitive resistor changes, and the voltmeter reading changes. The ship's workers can then directly observe the tension on the cable through the voltmeter reading and formulate corresponding measures, providing technical support for the stable and reliable operation of the cable. In summary, this invention has good application prospects. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the front planar structure of this utility model.

[0014] Figure 2 This is a top-view planar structural diagram of the present invention.

[0015] Figure 3 This is a partial planar structural schematic diagram of the present invention.

[0016] Figure 4 This is the circuit diagram of this utility model. Detailed Implementation

[0017] Figure 1 , 2As shown in Figures 3 and 4, a tension detection device for deep-sea cables includes a fixed plate 1, pulleys 2, force-sensitive resistors RL, shafts 3, sealed navigation sockets 4, hooks 5, bearings 6, wire ropes 7, sealing covers 8, O-rings 9, sealed navigation plugs (not shown in the figure), lifting seats 10, batteries G1, voltage display meters V, and resistors R. There are three shafts 3 and three pulleys 2. Each pulley 2 has a recessed mounting groove at its rear end, and a bearing 6 is fixedly installed in each groove. The front ends of the three shafts 4 are fixedly installed inside the inner rings of the three bearings 6. Two shafts 4 are fixedly installed on the upper front parts of the left and right ends of the fixed plate 1. The fixing plate 1 has a through-groove in the middle. The third shaft 3 has a hollow structure in the middle. The rear end of the third shaft 3 is sealed and fixedly installed in the front end of the fixing groove. An elastic column 31 is fixedly installed inside the third shaft 3 with an interference fit. The elastic column 31 has fixing seats 311 on both sides of the middle and mounting seats 312 on the rear side. A fixing cylinder 11 is sealed and installed at the rear end of the fixing groove. The rear end of the elastic column 31 is fixedly installed at the rear end of the fixing groove of the fixing plate 1 by bolts. The force-sensitive resistor RL is fixedly installed on the upper end of the mounting seat 312 of the elastic column. The rear inner side of the fixing cylinder 11 has internal threads, and the front end of the sealing cover 8... The sealing cap 8 and the fixed cylinder 11 are threaded together, with the front end of the sealing cap 8 and the rear end of the fixed cylinder 11 sealed together. An O-ring 9 is installed between the front side of the sealing cap 8 and the rear end of the fixed cylinder 11. A wire hole is located in the middle of the upper end of the fixed cylinder 11. A wire connected to the two terminals of the force-sensitive resistor RL is led upwards through the wire hole, which is filled with sealant (for waterproofing). The lower end of the sealed aviation socket 4 is fixedly installed on the fixed cylinder 11 at the wire hole location. The two terminals of the sealed aviation socket 4 are connected to the two terminals of the force-sensitive resistor RL via wires. The sealed aviation plug is inserted into the socket of the sealed aviation socket 4, and the wire connected to the sealed aviation plug is located... On a ship (not shown in the figure); the lower two ends of the "Π"-shaped lifting seat 10 are respectively fixedly installed on the upper sides of the left and right ends of the fixing plate 1. There is a fixing hole 1011 in the middle of the upper end of the lifting seat 10. The fixing hole 1011 is fixedly connected to the lower end of the lifting wire rope (not shown in the figure) of the hoist on the ship, etc.; the middle part of the wire rope 7 is wrapped around the lower end of the groove of the middle pulley 2, and the middle parts of the two ends of the wire rope 7 are respectively wrapped around the upper end of the groove of the pulley 2 at the left and right ends of the fixing plate. There are at least two hooks 5. The upper ends of the two hooks 5 are respectively fixedly installed together with the two ends of the wire rope 7. The battery G1, the voltage display meter V, and the resistor RL are installed in the component box 12 on the ship, etc.

[0018] Figure 1 , 2As shown in Figures 3 and 4, bearing 6 is a ceramic bearing, and a water seal ring (for sealing) is installed between the inner and outer rings of bearing 6. The three pulleys 2 have the same outer diameter, and the pulleys 2 at the left and right ends are on the same horizontal plane. The fixing plate 1, pulleys 2, shaft 3, fixing cylinder 11, and sealing cover 8 are made of titanium alloy, the hook 5, wire rope 7, and lifting seat 10 are made of steel, and the elastic column 31 is made of aluminum alloy. The battery G1, voltmeter V, resistor R, and force-sensitive resistor RL are connected by a wire. The other end of the force-sensitive resistor RL is connected to one end of resistor R and the positive power input terminal of voltmeter V, and the other end of resistor R is connected to the negative power input terminal of voltmeter V.

[0019] Figure 1 , 2 As shown in Figures 3 and 4, this new type of equipment has good sealing performance, which can prevent seawater from entering the equipment and causing damage after the equipment enters the deep sea. It also uses a force-sensitive resistor RL as the probe, which has the advantage of high detection sensitivity. In specific testing, the lower end of the winch wire rope on the ship and the fixing hole 1011 at the upper end of the lifting seat 10 are installed together. Then, the winch unwinds the cable and places the new type of equipment into the seabed testing area. When the worker, wearing a diving suit, is in the testing position, he hooks the two hooks 5 onto the two ends of the seabed cable at the testing position. After the winch lifts the cable to a certain height, separating it from the seabed, the worker communicates with the personnel on the ship through the communication equipment on the diving suit, prompting them to operate the winch to rewind the cable. When the wire rope is wound or unwound, its weight acts upwards on the pulley 2 at the front center of the fixed plate, causing it to move upwards and generating upward stress (the pulleys 2 at both ends guide the wire rope 7). The central shaft 3 detects this upward stress and transmits it to the force-sensitive resistor RL via the elastic column 31. The resistance of the force-sensitive resistor RL changes; the greater the cable tension, the smaller the resistance of RL and the smaller the voltage drop between resistor R (the higher the number displayed on the voltmeter V representing cable tension). Conversely, the smaller the cable tension, the larger the resistance of RL and the larger the voltage drop between resistor R (the lower the number displayed on the voltmeter V representing cable tension). Through this process, shipboard personnel can intuitively understand the cable tension through the voltmeter readings and formulate corresponding measures (e.g., if the cable tension is too low, the cable can be pulled tighter; conversely, if it is too high, the cable can be loosened), providing technical support for the stable and reliable operation of the cable. Figure 4 In this application, battery G1 is a 12V / 10Ah lithium battery; resistor R has a resistance of 1.2KΩ; voltmeter V is a finished product with a 12V LCD voltage display; and force sensor RL is a finished product with an FSR400 rating. These electronic components are existing mature technologies, and this application will not elaborate on their working principles in detail.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0021] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tension detection device for deep-sea cables, comprising a fixing plate, pulleys, force-sensitive resistors, shafts, sealed navigation sockets, hooks, bearings, wire ropes, sealing caps, O-rings, sealed navigation plugs, lifting seats, batteries, voltage display meters, and resistors; characterized in that, The system comprises multiple shafts and pulleys, each with a mounting groove at its rear end. A bearing is fixedly installed in each mounting groove. The front ends of the shafts are fixedly installed within the inner rings of the bearings. Two shafts are fixedly installed at the upper front of the left and right ends of a fixed plate. The fixed plate has a fixing groove in its middle. The middle of the third shaft is hollow. The rear end of the third shaft is sealed and fixedly installed within the front end of the fixing groove. An elastic column is fixedly fitted inside the third shaft with an interference fit. The elastic column has fixed seats on both sides of its middle section and a mounting seat on its rear side. A fixed cylinder is fixedly installed at the rear end of the fixing groove. The fixed seat at the rear end of the elastic column is fixedly installed at the rear end of the fixing groove on the fixed plate. A force-sensitive resistor is fixedly installed on the upper end of the mounting seat of the elastic column. The inner rear side of the fixed cylinder has internal threads, and the front end of the sealing cap has external threads. The front end of the sealing cover and the rear end of the fixed cylinder are threaded together, and an O-ring is fixedly installed between the front side of the sealing cover and the rear end of the fixed cylinder; the lower end of the sealing connector is sealed and fixedly installed on the fixed cylinder, and the two terminals of the sealing connector are respectively connected to the two terminals of the force-sensitive resistor via wires; the sealing plug is sealed and inserted into the socket of the sealing connector; the lower end of the lifting seat is fixedly installed on the fixed plate, and the upper middle part of the lifting seat has a fixing hole, which is fixedly connected to the lower end of the lifting wire rope of the winch; the wire rope is wrapped around the lower end of the groove of the middle pulley, and the two ends of the wire rope are respectively wrapped around the upper end of the groove of the pulleys at the left and right ends of the fixed plate; there are at least two hooks, and the upper ends of the two hooks are respectively fixedly installed together with the two ends of the wire rope; the battery, voltmeter, and resistor are installed in the component box.

2. The tension detection device for deep-sea cables according to claim 1, characterized in that, The bearing is a ceramic bearing, and a water seal ring is installed between the inner and outer rings of the bearing.

3. The tension detection device for deep-sea cables according to claim 1, characterized in that, The pulleys have the same outer diameter, and the pulleys at the left and right ends are on the same horizontal plane.

4. The tension detection device for deep-sea cables according to claim 1, characterized in that, The fixed plate, pulley, shaft, fixed cylinder, and sealing cover are made of titanium alloy, while the hook, wire rope, and lifting seat are made of steel, and the elastic column is made of aluminum alloy.

5. The tension detection device for deep-sea cables according to claim 1, characterized in that, Between the battery, voltmeter, resistor, and force-sensitive resistor, the positive terminal of the battery is connected to one end of the force-sensitive resistor via a wire, the other end of the force-sensitive resistor is connected to one end of the resistor and the positive power input terminal of the voltmeter, and the other end of the resistor is connected to the negative power input terminal of the voltmeter.

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