An automatic tension testing device for mooring chains

Abstract

The application discloses an automatic tension testing device for a mooring chain, which comprises a fixed base and a moving base, the moving base is slidably arranged on a base guide rail, the top of the fixed base and the moving base is respectively provided with a chain clamping part, two second oil cylinders are arranged between two first oil cylinders, the top of the piston rod of the two second oil cylinders is connected with a first sliding groove, and the chain clamping part is used for clamping the mooring chain in the lifting process of the second oil cylinder and the mooring chain which is pulled and moved in the first sliding groove; a protective cover is slidably arranged on the outer side of the tension mechanism, and the inner top surface of the protective cover is provided with a moving detection device which is used for detecting the mooring chain before and after tension test; the second oil cylinder drives the first sliding groove to realize the lifting of the mooring chain which is pulled and moved, and the chain clamping part on the two sides is used for clamping the mooring chain in the lifting process, so that the whole process does not need manual intervention, and the work efficiency and the automation degree are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mooring chain tension test, in particular to an automatic tension test equipment for mooring chain. BACKGROUND

[0002] Mooring chain is a kind of key equipment specially used in the fields of offshore oil and gas platforms, floating production storage and offloading vessels, offshore engineering, etc. It is mainly used to fix and stabilize floating structures, ensuring their safety and stability in harsh marine environments. Mooring chain is different from ordinary ship anchor chain. It is usually made of high-strength, corrosion-resistant steel and undergoes strict welding, heat treatment and various inspection processes, including tension test and flaw detection, to ensure the quality of the mooring chain before leaving the factory.

[0003] However, in the production and manufacturing process of long mooring chain, when the mooring chain is subjected to tension test, the traction machine is used to transport the heat-treated mooring chain to the tension test equipment, and then the chain ring of the mooring chain is aligned with the clamping jaws on both sides by manual operation, so that the clamping jaws can stably and accurately clamp the chain ring of the mooring chain for tension test. However, the mooring chain is large and heavy, and although manual operation can complete the alignment with the assistance of the traction machine, the operation process is too dangerous and the efficiency is low. In addition, manual operation is also used for flaw detection of the mooring chain, and flaw detection needs to be carried out before and after tension test, resulting in unstable detection results, low detection efficiency and high detection cost.

[0004] In Chinese patent CN101769809A, an anchor chain tension testing machine is disclosed, which is composed of main oil cylinders, a frame, auxiliary oil cylinders and clamping jaws. The frame is provided with movable clamping jaw seats, and the movable clamping jaw seats are provided with pulleys at both ends, which can move left and right on the frame. Two clamping jaws are provided on the movable clamping jaw seats, and the top ends of the two clamping jaws are respectively fixed with auxiliary oil cylinders on the frame. The two main oil cylinders are fixed at one end on the movable clamping jaw seats and at the other end on the fixed clamping jaw seats. The fixed clamping jaw seats are also provided with two clamping jaws, and one auxiliary oil cylinder is provided at the top end of each clamping jaw. The auxiliary oil cylinder is connected to the clamping jaw at one end and fixed at the other end. This invention can meet the needs of large-tonnage anchor chain tension test, and has the characteristics of small occupied area, compact equipment and high efficiency. However, manual alignment and correction of the clamping position of the chain ring by the clamping jaws are required when the clamping jaws are used to clamp the anchor chain, which has the potential safety hazard and low clamping efficiency of the chain ring. SUMMARY

[0005] The purpose of the present application is to solve the problems in the tension test of mooring chain as described in the background, and to provide an automatic tension test equipment for mooring chain.

[0006] The present invention achieves the above-mentioned objective through the following technical solution: an automatic tensile testing device for mooring chains, comprising a fixed base and a movable base, the movable base being slidably mounted on a base guide rail, a tensile mechanism for testing the tensile force of the mooring chain being provided between the base guide rail and the fixed base, the tensile mechanism comprising two first hydraulic cylinders disposed between the movable base and the fixed base, the first hydraulic cylinders being fixedly mounted on the side of the fixed base, the movable base being connected to the piston rod of the first hydraulic cylinder driving its movement, and a load sensor for testing tensile force being installed between the front end of the piston rod of the first hydraulic cylinder and the movable base; chain clamping components are installed on the top of both the fixed base and the movable base, and two... Two second hydraulic cylinders are provided between the first hydraulic cylinders. The top of the piston rods of the two second hydraulic cylinders are connected to a first sliding groove. During the process of the second hydraulic cylinders driving the mooring chain, which is being pulled and moved within the first sliding groove, to rise and fall, the chain clamping member is used to clamp the mooring chain. After the tension mechanism completes the tension test on the mooring chain, the first hydraulic cylinder is reset to eliminate the tightness of the mooring chain and restore the slack between the chain links. The second hydraulic cylinder drives the first sliding groove to rise to lift the mooring chain from the chain clamping member and release it. A sliding protective cover is provided on the outside of the tension mechanism. The inner top surface of the protective cover is equipped with a moving detection device for flaw detection of the mooring chain before and after the tension test.

[0007] Furthermore, the chain clamping component includes a chain clamping opening and a chain blocking portion; the chain clamping component is composed of two symmetrically arranged chain clamping blocks.

[0008] Furthermore, the mobile detection device includes a lifting and moving assembly and a detection assembly; the lifting and moving assembly includes four telescopic cylinders installed on the top surface inside the protective cover, one end of the telescopic rod of each telescopic cylinder is connected to a mounting frame, a lead screw is rotatably mounted on the mounting frame, guide rods are provided on both sides of the lead screw, a motor is mounted on the outer side of the mounting frame, and the output end of the motor is fixedly connected to one end of the lead screw.

[0009] Furthermore, the detection assembly includes a movable plate screwed to the lead screw, and the guide rod is installed through the movable plate; a first mounting frame is connected to the bottom of the movable plate, and detectors are installed on the first mounting frame at three positions: upper, middle, and lower. The upper and lower positions of the first mounting frame are symmetrically arranged with an upper detector and a lower detector for detecting vertical mooring chains, and the middle position of the first mounting frame is symmetrically arranged with a middle detector for detecting lateral mooring chains. The detector includes an electric push rod and a probe installed at one end of the telescopic rod of the electric push rod.

[0010] Furthermore, a second mounting bracket is provided on one side of the first mounting bracket and connected to the bottom of the movable plate. A sprayer for applying coupling agent to the mooring chain detection area is installed in the second mounting bracket. The sprayer has nozzles corresponding to the mooring chain positions detected by the detector. The top surface of the protective cover is provided with a container for holding the coupling agent. A delivery pump is connected to one side of the container via a pipeline. The delivery pump is then connected to the sprayer via a hose.

[0011] Furthermore, the mooring chain input side of the tensioning mechanism is equipped with a cleaning mechanism for pre-brushing the surface of the mooring chain. The cleaning mechanism includes a cleaning box, in which two symmetrically arranged brush rods are rotatably mounted. The brush rods are driven by a motor. A semi-circular cleaning device is provided on one side of the brush rod. The cleaning device has multiple air holes to blow away residue from the surface of the mooring chain. The cleaning device is connected to the top of the cleaning box via a connecting rod and is connected to an external air pump via a pipeline. A vacuum cleaner is provided in the lower box of the cleaning box and communicates with the upper box.

[0012] Furthermore, the cleaning box is provided with a second sliding groove on both sides, and a third sliding groove is provided on one side of the base guide rail. The third sliding groove is spaced a certain distance from the movable seat. The bottom of the second sliding groove, the third sliding groove, and the first oil cylinder are all provided with a support platform.

[0013] Furthermore, the top edges of both ends of the first chute are chamfered, the bottom of the two side grooves in the first chute groove are inclined to the middle, and a through hole is provided in the middle part of the first chute groove, and a recovery bucket for recovering coupling agent is provided below the through hole.

[0014] Furthermore, both the fixed seat and the movable seat have limiting grooves on their sides for limiting the first slide groove; the movable seat moves on the base guide rail using a sliding rail or pulley.

[0015] Furthermore, slide rails are provided on both sides of the fixed base, and the protective cover slides on the slide rails via electrical control.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention uses a second hydraulic cylinder to drive a first sliding groove to raise and lower the mooring chain during traction. During the raising and lowering process, the chain clamps on both sides are used to clamp the mooring chain. The entire process requires no manual intervention, greatly improving work efficiency and automation. By installing a load sensor between the piston rod of the first hydraulic cylinder and the moving seat, the stress on the mooring chain during the tensile test can be monitored and recorded in real time, ensuring the accuracy and reliability of the test data.

[0018] 2. The mobile inspection device includes a lifting and moving assembly and an inspection assembly, which can perform comprehensive flaw detection on the mooring chain before and after the tensile test. The two work together to inspect multiple positions on multiple mooring chains. It uses detectors at the top, bottom, and middle to inspect the vertical and horizontal mooring chains, ensuring that the chains in all directions can be effectively inspected, thus improving the comprehensiveness of the test. Before the flaw detection, the inspection assembly is automatically sprayed with coupling agent by a sprayer to ensure good contact between the probe and the surface of the mooring chain, thus improving the inspection effect and efficiency.

[0019] 3. The cleaning mechanism pre-treats the surface of the mooring chain with abrasive brushes and blows away residue with a debris remover. It is also equipped with a vacuum cleaner to clean the internal dust, ensuring the cleanliness of the mooring chain before testing and improving the accuracy of the test results. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the tension mechanism in this invention;

[0022] Figure 3 This is a cross-sectional view of the tension mechanism of the present invention;

[0023] Figure 4 This is an exploded view of the tension mechanism in this invention;

[0024] Figure 5 This is a schematic diagram of the chain component in this invention;

[0025] Figure 6 This is a schematic diagram of the first groove in the present invention;

[0026] Figure 7 This is a schematic diagram of the internal structure of the protective cover after cross-section in this invention;

[0027] Figure 8 This is a schematic diagram of the motion detection device in this invention;

[0028] Figure 9 This is a schematic diagram showing the position of the detection component detecting the mooring chain in this invention;

[0029] Figure 10 This is a schematic diagram showing the position where the detector detects the mooring chain in this invention;

[0030] Figure 11 This is a schematic diagram of the structure inside the upper chamber of the cleaning box in this invention;

[0031] Figure 12 This is a cross-sectional view of the cleaning box in this invention.

[0032] In the diagram: 1-Fixed seat, 2-Moving seat, 3-Base guide rail, 4-Tension mechanism, 5-Load sensor, 6-Protective cover, 7-Moving detection device, 8-Lifting and moving assembly, 9-Detection assembly, 10-Container box, 11-Transfer pump, 12-Cleaning mechanism, 13-Second chute, 14-Third chute, 15-Support platform, 16-Recycling bin, 17-Limiting groove, 18-Slide rail;

[0033] 41-First hydraulic cylinder, 42-Chain clamping part, 43-Second hydraulic cylinder, 44-First slide groove, 421-Chain clamping opening, 422-Chain blocking part, 423-Chain clamping block, 441-Through hole;

[0034] 81-Telescopic cylinder, 82-Mounting frame, 83-Lead screw, 84-Guide rod, 85-Motor;

[0035] 91-Moving plate, 92-Mounting bracket, 93-Detector, 94-Second mounting bracket, 95-Sprayer, 931-Upper detector, 932-Lower detector, 933-Middle detector, 951-Sprayer head, 9301-Electric push rod, 9302-Probe;

[0036] 121-Cleaning box, 122-Abrasive brush, 123-Slag remover, 124-Vacuum cleaner, 1231-Air blower. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] In the manufacturing process of long mooring chains, after heat treatment, the mooring chain is conveyed to a tensile testing device via conveyor rollers for tensile testing. During the conveying process, a traction machine is used to pull one end of the mooring chain, thus ensuring its smooth transport to the tensile testing device. The traction machine is not described in this invention; please refer to [reference needed].Figure 1 From left to right, the directions represent the conveying direction of the mooring chain and the traction direction of the traction machine.

[0040] Combination Figures 1 to 12 An automatic tensile testing device for mooring chains is shown, comprising a fixed base 1 and a movable base 2. The movable base 2 is slidably mounted on a base guide rail 3. A tensile mechanism 4 for testing the tensile strength of the mooring chain is provided between the base guide rail 3 and the fixed base 1. The tensile mechanism 4 includes two first hydraulic cylinders 41 disposed between the movable base 2 and the fixed base 1. The first hydraulic cylinders 41 are fixedly mounted on the side of the fixed base 1. The movable base 2 is connected to the piston rod of the first hydraulic cylinder 41 that drives its movement, and a tensile testing device is installed between the front end of the piston rod of the first hydraulic cylinder 41 and the movable base 2. Load sensor 5; a clamping chain 42 is installed on the top of both the fixed base 1 and the movable base 2; two second oil cylinders 43 are provided between the two first oil cylinders 41; the top of the piston rod of the two second oil cylinders 43 is connected to a first slide groove 44; the second oil cylinder 43 uses the clamping chain 42 to clamp the mooring chain during the process of lifting and lowering the mooring chain that is being pulled and moved in the first slide groove 44; a sliding protective cover 6 is provided on the outside of the tension mechanism 4; a moving detection device 7 is installed on the inner top surface of the protective cover 6 to perform flaw detection on the mooring chain before and after the tension test;

[0041] like Figures 2-5 As shown, the chain clamping component 42 includes a chain clamping opening 421 and a chain blocking part 422; the chain clamping component 42 is composed of two symmetrically arranged chain clamping blocks 423, which are fastened to the fixed base 1 and the movable base 2 respectively by bolts, thereby facilitating the maintenance or replacement of the chain clamping blocks 423; both the fixed base 1 and the movable base 2 have limiting grooves 17 on their sides for limiting the first slide groove 44 during the rising or falling process; the movable base 2 moves on the base guide rail 3 by means of a slide rail or pulley;

[0042] When conducting tensile tests on long mooring chains, segmented sampling inspections are performed. Therefore, in use, the mooring chain is pulled into the tension mechanism 4 by the traction machine. Two second hydraulic cylinders 43 are activated to raise the first slide 44 a certain distance. The two second hydraulic cylinders 43 ensure the stability of the first slide 44's ascent. When the mooring chain is pulled into the first slide 44, the chain on the first slide 44 also rises due to the rise of the first slide 44, thus preventing the mooring chains on both sides of the first slide 44 from being clamped by the chain clamps 42 on both sides of the first slide 44. Specifically, during the traction process of the mooring chain, a single link will not fall directly horizontally into the clamping opening 421 of the clamping member 42, and will not be blocked by the chain blocking part 422. The mooring chain will tilt and rise at the two clamping members 42 and smoothly pass through the two clamping members 42 under traction. When the mooring chain needs to be inspected, the second hydraulic cylinder 43 is activated to reset the first slide groove 44 downwards. During the traction process of the mooring chain, a single link will be clamped by the clamping member 42 on the fixed seat 1, while the link on the other side will fall into the clamping member 42 installed on the moving seat 2. Figure 2 As shown; at this time, if the traction machine cannot pull, it will immediately stop traction. Then, before the formal test tension is applied, a small preload force is applied to the mooring chain to eliminate the gaps and slack between the chain links, so that the mooring chain is in a normal stress state. Then, the first hydraulic cylinder 41 applies a thrust to the moving seat 2 to test the tension of the mooring chain. During the test, the data recording system of the testing machine is used to record the force value, displacement, time and other data in real time. After the test of this section of the mooring chain is completed, the first hydraulic cylinder 41 is reset and the chain links are slack. Then, the second hydraulic cylinder 43 is started to drive the mooring chain that has just been tested in the first slide groove 44 to rise. Since the slack between the chain links is restored, the mooring chain can be easily lifted out of the chain clamp 42. Then, the traction machine is started again to continue to pull the mooring chain.

[0043] like Figures 7-8 As shown, the mobile detection device 7 includes a lifting and moving assembly 8 and a detection assembly 9. The lifting and moving assembly 8 includes four telescopic cylinders 81 installed on the top surface inside the protective cover 6. One end of the telescopic rod of the telescopic cylinder 81 is connected to a mounting frame 82. A lead screw 83 is rotatably mounted on the mounting frame 82. Guide rods 84 are provided on both sides of the lead screw 83. A motor 85 is installed on the outer side of the mounting frame 82. The output end of the motor 85 is fixedly connected to one end of the lead screw 83. In use, the detection assembly 9 can be adjusted up and down by controlling the telescopic cylinders 81, and the detection assembly 9 can be adjusted laterally by controlling the rotation of the lead screw 83 driven by the motor 85.

[0044] like Figures 7-10As shown, the detection assembly 9 includes a movable plate 91 screwed to the lead screw 83, and guide rods 84 are installed inside the movable plate 91. In use, the movable plate 91 moves by being screwed to the lead screw 83, and the two guide rods 84 guide the movement of the movable plate 91.

[0045] like Figures 9-10 As shown, a first mounting frame 92 is connected to the bottom of the movable plate 91. Detectors 93 are installed on the first mounting frame 92 at three positions: upper, middle, and lower. An upper detector 931 and a lower detector 932 for detecting vertical mooring chains are symmetrically arranged at the upper and lower positions of the first mounting frame 92, and a middle detector 933 for detecting lateral mooring chains is symmetrically arranged at the middle position of the first mounting frame 92. Each detector 93 includes an electric push rod 9301 and a probe 9302 installed at one end of the telescopic rod of the electric push rod 9301. Multiple detectors 93 are symmetrically arranged on both sides of the first mounting frame 92.

[0046] Before the formal tensile test of the mooring chain, i.e., after a preload force is applied to the mooring chain, the mooring chain is in a taut state, such as... Figure 9 As shown, the second hydraulic cylinder 43 first drives the first slide 44 downward to avoid obstructing the detection component 9. Then, the lifting and moving component 8 moves the detection component 9 to the mooring chain to be tested. Next, ultrasonic flaw detection is performed on the mooring chain before tensile testing, as shown. Figure 10 As shown, the probe 9302 is moved to the mooring chain by the electric push rod 9301 and contacts the surface of the mooring chain. Then, the moving plate 91 moves, causing the probe 9302 to slide on the surface of the mooring chain. Thus, the vertical and horizontal parts of the mooring chain are detected by the detectors 93 at the top, bottom, and middle. Different positions can be detected separately, and the data is received and compared by an externally connected flaw detection system, avoiding the singleness of the detection data and improving the comprehensiveness and accuracy of the detection. In addition, multiple chain links can be detected by the lifting and moving assembly 8. After the detection is completed, the lifting and moving assembly 8 resets the detection assembly 9, and then a formal tensile test is performed. After the tensile test is completed, the lifting and moving assembly 8 and the detection assembly 9 can be used again to perform ultrasonic flaw detection on the mooring chain after the tensile test in the same way, so as to compare the flaw detection changes of the mooring chain before and after the tensile test, thereby determining the production quality of the mooring chain.

[0047] When using an ultrasonic flaw detector to inspect mooring chains, a coupling agent is required. The function of the coupling agent is to fill the tiny gaps between the probe and the surface of the mooring chain, reduce the reflection and scattering of ultrasonic waves at the interface, and ensure that ultrasonic waves can be effectively transmitted into the interior of the mooring chain. Therefore, before using the inspection component 9 to inspect the mooring chain, a coupling agent needs to be sprayed onto the surface of the mooring chain to be inspected.

[0048] like Figures 7-9 As shown, a second mounting bracket 94 is connected to and installed on the bottom of the movable plate 91 on one side of the first mounting bracket 92. A sprayer 95 for applying coupling agent to the mooring chain detection area is installed inside the second mounting bracket 94. The sprayer 95 has nozzles 951 corresponding to the mooring chain positions detected by the detector 93. A container 10 for holding the coupling agent is provided on the top surface of the protective cover 6. A delivery pump 11 is connected to one side of the container 10 via a pipe, and the delivery pump 11 is then connected to the sprayer 95 via a hose. In use, as... Figure 9 In this process, the sprayer 95 is moved to the mooring chain using the lifting and moving component 8. Then, the delivery pump 11 is started to deliver the coupling agent in the container box 10 to the sprayer 95, and sprays it onto the surface of the mooring chain to be inspected through the nozzle 951. After the spraying is completed, the mooring chain is subjected to ultrasonic flaw detection using the detector 93. The delivery pump 11 can be a metering pump to quantitatively spray the coupling agent onto the surface of the mooring chain, thereby controlling costs and reducing waste.

[0049] When using an ultrasonic flaw detector to inspect mooring chains, the surface of the mooring chain needs to be cleaned to ensure the accuracy of the inspection. This is especially important for mooring chains that have undergone heat treatment, as their surfaces are covered with oxide crust and debris, which need to be cleaned in advance.

[0050] like Figures 11-12 As shown, a cleaning mechanism 12 for pre-brushing the surface of the mooring chain is provided on the input side of the mooring chain on one side of the tension mechanism 4. The cleaning mechanism 12 includes a cleaning box 121. Two symmetrically arranged brush rods 122 are rotatably installed in the upper box of the cleaning box 121. The brush rods 122 are driven by a motor. A semi-circular cleaning device 123 is provided on one side of the brush rods 122. The cleaning device 123 has multiple air holes 1231 to blow away the residue on the surface of the mooring chain. The cleaning device 123 is connected to the top of the cleaning box 121 via a connecting rod and is connected to an external air pump via a pipeline. A vacuum cleaner 124 communicating with the upper box is provided in the lower box of the cleaning box 121. In use, after passing through After heat treatment, the mooring chain is first pulled into the upper chamber of the cleaning box 121 by the traction machine. Then, the motor drives the two grinding rods 122 to rotate. The wire brushes on the grinding rods 122 will brush the surface of the mooring chain, thereby removing the residual oxide scale and residue. Then, the external air pump is started to supply air to the cleaning device 123, so that the air blowing hole 1231 on the cleaning device 123 can be used to blow dust from the brushed surface of the mooring chain to remove the grinding debris. At the same time, the vacuum cleaner 124 in the lower chamber is started to collect the grinding debris. The air blowing hole 1231 can be tilted towards the suction port of the vacuum cleaner 124 to facilitate the rapid collection of grinding debris and reduce the splashing and outflow of grinding debris.

[0051] likeFigure 3 and Figure 6 As shown, the top edges of both ends of the first chute 44 are chamfered to ensure that the mooring chain will not get stuck at the end face of the first chute 44 during movement after the first chute 44 has risen a certain distance. The bottom of the two side grooves in the first chute 44 slopes towards the middle, and a through hole 441 is provided in the middle of the first chute 44. A recovery bucket 16 for recovering the coupling agent is provided below the through hole 441. When the sprayer 95 sprays the mooring chain with coupling agent, the coupling agent will drip into the first chute 44 and then flow into the recovery bucket 16 from the through hole 441, thereby completing the recovery of the coupling agent and reducing resource waste.

[0052] like Figures 1-2 As shown, the cleaning box 121 is provided with a second slide groove 13 on both sides, and a third slide groove 14 is provided on one side of the base guide rail 3. The third slide groove 14 is spaced a certain distance from the moving seat 2 to avoid the third slide groove 14 from obstructing the movement of the moving seat 2 when the mooring chain is subjected to tensile testing. The bottom of the second slide groove 13, the third slide groove 14 and the first oil cylinder 41 are all provided with a support platform 15. The fixed seat 1 is provided with slide rails 18 on both sides, and the protective cover 6 slides on the slide rails 18 through electrical control.

[0053] Working Principle: In use, the mooring chain, pulled by the traction machine, first passes through the cleaning mechanism 12. The cleaning mechanism 12 uses abrasive rods 122 to pre-brush the surface of the mooring chain, removing oxide layers and residues. A dust remover 123 blows away dust, and a vacuum cleaner 124 collects the residues. The mooring chain then enters the tensioning mechanism 4. The second hydraulic cylinder 43 lifts the first slide rail 44 a certain distance, allowing the mooring chain to continue moving smoothly. When tension testing is required, the second hydraulic cylinder 43 resets the first slide rail 44. As the mooring chain continues to move, the chain links are clamped by the chain clamping member 42. After applying a small preload force, the mooring chain straightens, allowing for ultrasonic flaw detection before tension testing. The lifting and moving component 8 is used to adjust the detection position. Then, the sprayer 95 is used to spray coupling agent onto the detection position of the mooring chain to improve the detection effect. After the coupling agent is sprayed, the detector 93 in the detection component 9 is used to perform ultrasonic flaw detection on the horizontal and vertical chain links from the top, middle and bottom positions respectively. After the detection is completed, the detection component 9 is reset. Then, the first hydraulic cylinder 41 can be used to push the moving seat 2 to perform a tensile test on the mooring chain. During the test, the data recording system of the testing machine is used to record the force value, displacement, time and other data in real time. After the tensile test is completed, the lifting and moving component 8 and the detection component 9 can be used again to perform ultrasonic flaw detection on the mooring chain after the tensile test in the same way to compare the flaw detection changes of the mooring chain before and after the tensile test, thereby determining the production quality of the mooring chain.

[0054] In this invention, the mobile detection device 7 and the cleaning mechanism 12 can be programmed using an existing industrial-grade automated control system, while the tensile test can record various data of the tensile test through the testing machine data recording system.

[0055] The coupling agent used in the ultrasonic flaw detector of this invention can be selected according to the actual production situation:

[0056] 1. Lubricating oils: such as compressor lubricating oil, steam engine lubricating oil, spindle oil, industrial petroleum jelly, grease, etc. These coupling agents have high viscosity and poor fluidity, making them suitable for workpieces with rough surfaces, and they are harmless to operators.

[0057] 2. Chemical paste (carboxymethyl cellulose): This is a food additive derived from starch. It is inexpensive, non-corrosive to workpieces, and harmless to the human body. It can be mixed with tap water to form an "industrial glue" for use as a coupling agent, suitable for workpieces with generally rough surfaces.

[0058] 3. Water glass (sodium silicate): Water glass has good sound transmission and is inexpensive, but it is highly absorbent.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0060] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic tensile testing device for mooring chains, comprising a fixed base (1) and a movable base (2), wherein the movable base (2) is slidably disposed on a base guide rail (3), and a tensile mechanism (4) for testing the tensile force of the mooring chain is provided between the base guide rail (3) and the fixed base (1), the tensile mechanism (4) comprising two first hydraulic cylinders (41) disposed between the movable base (2) and the fixed base (1), the first hydraulic cylinders (41) being fixedly mounted on the side of the fixed base (1), the movable base (2) being connected to the piston rod of the first hydraulic cylinder (41) driving its movement, and a load sensor (5) for testing tensile force is installed between the front end of the piston rod of the first hydraulic cylinder (41) and the movable base (2); characterized in that: Both the fixed base (1) and the movable base (2) are equipped with clamping chain members (42) on their tops. Two second oil cylinders (43) are provided between the two first oil cylinders (41). The piston rods of the two second oil cylinders (43) are connected to the tops of the first slide grooves (44). When the second oil cylinders (43) drive the mooring chain, which is being pulled and moved in the first slide grooves (44), to rise and fall, they use the clamping chain members (42) to clamp the mooring chain. After the tension mechanism (4) completes the tension test on the mooring chain, the first oil cylinders (41) reset to eliminate the mooring chain. The chain is brought to a taut state and the chain links are restored to a relaxed state. The second cylinder (43) drives the first slide groove (44) to rise so as to lift the mooring chain from the chain clamp (42) to achieve unhooking. The outer side of the tension mechanism (4) is provided with a sliding protective cover (6). The inner top surface of the protective cover (6) is equipped with a moving detection device (7) for performing flaw detection on the mooring chain before and after the tension test. The chain clamp (42) includes a chain clamping opening (421) and a chain blocking part (422). The chain clamp (42) is composed of two symmetrically arranged chain clamping blocks (423).

2. The automatic tensile testing device for mooring chains according to claim 1, characterized in that: The mobile detection device (7) includes a lifting and moving assembly (8) and a detection assembly (9); the lifting and moving assembly (8) includes four telescopic cylinders (81) installed on the top surface inside the protective cover (6), one end of the telescopic rod of the telescopic cylinder (81) is connected to a mounting frame (82), a lead screw (83) is rotatably installed on the mounting frame (82), guide rods (84) are provided on both sides of the lead screw (83), a motor (85) is installed on the outer side of the mounting frame (82), and the output end of the motor (85) is fixedly connected to one end of the lead screw (83).

3. The automatic tensile testing device for mooring chains according to claim 2, characterized in that: The detection component (9) includes a movable plate (91) screwed to the lead screw (83), and a guide rod (84) is installed through the movable plate (91). A first mounting frame (92) is connected to the bottom of the movable plate (91). Detectors (93) are installed on the first mounting frame (92) at three positions: upper, middle and lower. The upper and lower positions of the first mounting frame (92) are symmetrically provided with an upper detector (931) and a lower detector (932) for detecting vertical mooring chains. The middle position of the first mounting frame (92) is symmetrically provided with a middle detector (933) for detecting lateral mooring chains. The detector (93) includes an electric push rod (9301) and a probe (9302) installed at one end of the telescopic rod of the electric push rod (9301).

4. The automatic tensile testing device for mooring chains according to claim 3, characterized in that: A second mounting bracket (94) is connected to the bottom of the movable plate (91) on one side of the first mounting bracket (92). A sprayer (95) for spraying coupling agent on the mooring chain detection area is installed in the second mounting bracket (94). The sprayer (95) is provided with nozzles (951) corresponding to the mooring chain positions detected by the detector (93). The top surface of the protective cover (6) is provided with a container box (10) for holding coupling agent. A delivery pump (11) is connected to one side of the container box (10) through a pipeline. The delivery pump (11) is then connected to the sprayer (95) through a hose.

5. The automatic tensile testing device for mooring chains according to claim 4, characterized in that: The mooring chain input side of the tension mechanism (4) is provided with a cleaning mechanism (12) for pre-brushing the surface of the mooring chain. The cleaning mechanism (12) includes a cleaning box (121). Two symmetrically arranged brush rods (122) are rotatably installed in the upper box of the cleaning box (121). The brush rods (122) are driven by a motor. A semi-circular slag remover (123) is provided on one side of the brush rods (122). The slag remover (123) has multiple air holes (1231) to blow away the residue on the surface of the mooring chain. The slag remover (123) is connected to the inner top of the cleaning box (121) by a connecting rod. The slag remover (123) is connected to an external air pump through a pipeline. A vacuum cleaner (124) communicating with the upper box is provided in the lower box of the cleaning box (121).

6. The automatic tensile testing device for mooring chains according to claim 5, characterized in that: The cleaning box (121) is provided with a second slide groove (13) on both sides, and a third slide groove (14) is provided on one side of the base guide rail (3). The third slide groove (14) is spaced a certain distance from the moving seat (2). The bottom of the second slide groove (13), the third slide groove (14) and the first oil cylinder (41) are all provided with a support platform (15).

7. The automatic tensile testing device for mooring chains according to claim 6, characterized in that: The top edges of both ends of the first chute (44) are chamfered. The bottom of the two sides of the groove in the first chute (44) is inclined to the middle. A through hole (441) is provided in the middle part of the groove of the first chute (44). A recycling bucket (16) for recycling the coupling agent is provided below the through hole (441).

8. The automatic tensile testing device for mooring chains according to claim 7, characterized in that: Both the fixed seat (1) and the movable seat (2) have limiting grooves (17) on their sides for limiting the first slide groove (44); the movable seat (2) moves on the base guide rail (3) using a slide rail or pulley.

9. The automatic tensile testing device for mooring chains according to claim 8, characterized in that: The fixed base (1) is provided with slide rails (18) on both sides, and the protective cover (6) slides on the slide rails (18) by electrical control.

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