Method and device for testing fixing piece for fastening goods of roll-on-roll-off ship

Abstract

The invention discloses a testing method and device of a fixing piece for fastening goods of a roll-on-roll-off ship, and relates to the technical field of roll-on-roll-off ship fastening device detection.The testing device comprises a testing deck, a deck fastening piece used for testing is arranged on the testing deck, and the testing deck is further provided with a hydraulic jack used for driving a stand column; a tightening mechanism used for tensioning is further arranged on the testing deck, an electronic dynamometer is further arranged on the side, away from the tensioning mechanism, of the stand column, and the electronic dynamometer and the tightening mechanism are connected with the testing deck through corresponding deck connecting mechanisms. During use, the electric hydraulic jack is selected to improve the operation efficiency and safety, meanwhile, the tightening mechanism capable of being flexibly selected and diversified connecting points are adopted, and therefore the operation efficiency and safety are improved. And high-efficiency testing of different types of deck fastening pieces is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing of a roll-on / roll-off ship mooring device, in particular to a testing method and device for a roll-on / roll-off ship cargo mooring fixing member. BACKGROUND

[0002] During the voyage of a PCTC ship, the ship is always subjected to complex and changeable sea conditions. The invasion of wind and waves and the rolling and swaying of the ship body may cause the cargo to move and shake, and even fall off in severe cases. This not only directly causes damage to the cargo and economic losses, but also poses a great threat to the smooth sailing and overall safety of the ship. Therefore, it is crucial to equip the cargo with reliable mooring device fixing members to ensure that the cargo is always firmly and stably fixed during the voyage. To ensure the reliability of these fixing members, accurate testing of their performance is a key link.

[0003] However, the traditional testing methods have many obvious defects. For example, some testing methods must rely on large equipment such as cranes to complete the test, which is not only very inconvenient to operate, but also occupies a large amount of space. Moreover, these traditional methods can only test a single fixing member at a time, resulting in low testing efficiency. If such strength testing and verification is directly performed on the ship, it will cause damage and injury to the fixing members and the ship body to some extent, greatly increasing the cost of testing. In addition, during actual use, the cargo mooring device fixing member will be subjected to forces from different directions, but some existing testing devices have limitations and are only suitable for testing in the vertical or small-angle direction relative to the installation surface, which cannot meet the actual demand for multi-angle testing. SUMMARY

[0004] In view of the problems existing in the prior art, the present application is proposed.

[0005] Therefore, the present application aims to provide a testing method and device for a roll-on / roll-off ship cargo mooring fixing member, which solves the problems in the testing of PCTC ship cargo mooring device fixing members. The traditional testing methods have obvious defects: they rely on large equipment such as cranes, are inconvenient to operate and occupy a large amount of space, can only test a single fixing member at a time, and have low efficiency; testing on the ship will cause damage to the fixing members and the ship body, increasing the cost; and existing testing devices are limited to vertical or small-angle testing, which cannot meet the demand for multi-angle testing required by the actual stress of the fixing member.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a testing device for ro-ro cargo securing fixtures, comprising a test deck provided with deck fasteners for testing, a hydraulic jack for driving a column, a tightening mechanism for tensioning, an electronic dynamometer provided on a side of the column away from the tightening mechanism, the electronic dynamometer and the tightening mechanism being connected to the test deck via corresponding deck connecting mechanisms, and the electronic dynamometer being located between the tightening mechanism and the deck connecting mechanism;

[0007] The end of the piston rod of the hydraulic jack away from the test deck is fixedly connected to the column, and an inclined adjustment support rod is installed on the column. The top of the adjustment support rod is fixedly connected to the column, and the end of the adjustment support rod close to the test deck is provided with a limit seat that abuts against the test deck, and the limit seat is fixedly connected to the bottom end of the corresponding adjustment support rod.

[0008] As a preferred solution of the testing device for the fixing parts for securing cargo of roll-on / roll-off ships described in the present invention, the two ends of the electronic dynamometer are respectively hingedly connected with a tensioning connection end and a deck connection end, and the electronic dynamometer is respectively connected to the tightening mechanism and the deck connection mechanism through the tensioning connection end and the deck connection end.

[0009] As a preferred solution of the testing device for the fixing parts for securing cargo of roll-on / roll-off ships described in the present invention, the tightening mechanism is composed of a chain tightener and a lifting chain or a belt tightener and a flexible lashing belt, and the end of the column away from the test deck is respectively abutted and connected with the lifting chain or the flexible lashing belt, the end of the lifting chain away from the chain tightener is connected to the electronic force gauge through the tensioning connection end, and the end of the flexible lashing belt away from the belt tightener is also connected to the electronic force gauge through the tensioning connection end.

[0010] As a preferred solution of the testing device for the fixing parts for securing roll-on / roll-off ship cargoes described in the present invention, the chain tightener includes a first threaded frame and a second threaded frame, and a handwheel portion driven by a wrench body is provided between the first threaded frame and the second threaded frame, a bidirectional screw is fixedly mounted on the handwheel portion, and the two ends of the bidirectional screw are respectively threadedly connected to the first threaded frame and the second threaded frame, a wrench shaft is hingedly connected to the wrench body, and the wrench body is rotatably connected to the handwheel portion via the wrench shaft.

[0011] As a preferred solution of the testing device of the fixing parts for securing cargo of roll-on / roll-off ships described in the present invention, wherein: the first threaded rack and the second threaded rack are both provided with a U-shaped groove at one end away from the handwheel part, and the U-shaped groove is provided with a limit pin for limiting the movement of the lifting chain, and the end of the limit pin in the U-shaped groove extending outside the U-shaped groove is disassembled and installed with an anti-detachment plug, and the limit pin in the U-shaped groove is installed on the corresponding first threaded rack through an anti-detachment rope.

[0012] As a preferred solution of the testing device for the fixing parts for securing cargo of roll-on / roll-off ships described in the present invention, a tightening belt is provided on the side of the belt tightener away from the flexible lashing belt, and the tightening belt and the end of the flexible lashing belt away from the belt tightener are respectively provided with lashing hooks connected to the test deck, and the end of the flexible lashing belt away from the belt tightener is connected to the tensioning connection end through the lashing hook.

[0013] As a preferred solution of the testing device for the fixing parts for securing cargo of roll-on / roll-off ships described in the present invention, the deck connection mechanism is an elephant foot or a butterfly buckle, and both the elephant foot and the butterfly buckle are connected to the electronic force gauge through the deck connection end, and the ends of the elephant foot and the butterfly buckle away from the test deck are respectively connected to the corresponding U-shaped grooves.

[0014] As a preferred solution of the testing device for the fixing parts for securing cargo on a roll-on / roll-off ship according to the present invention, fixing parts or lashing strap holes are evenly spaced and arranged on the test deck, the fixing parts include an embedded base or a first plywood D-ring or a wave rod or a second plywood D-ring, and the embedded base is connected to the second threaded frame via an elephant foot, the first plywood D-ring, the wave rod and the second plywood D-ring are respectively adapted to the butterfly buckle, and the lashing strap holes are connected to the tightening belt via a lashing hook.

[0015] A method for testing a fixing for securing cargo on a roll-on / roll-off ship, characterized by comprising the following steps:

[0016] Step 1: When using the device, first use the test deck as a platform. Depending on the type of deck fastener to be tested, select the appropriate deck connection mechanism such as a foot or butterfly buckle and a tightening mechanism such as a chain tightening and lifting chain, or a belt tightener and flexible lashing strap. Complete the assembly and adjust the support rod to fix the column at a suitable angle of 15° to 75°.

[0017] Step 2: Turn the wrench of the chain tensioner or operate the belt tensioner to adjust the tension of the tensioning mechanism and apply pre-tightening force to the deck fasteners. The electronic dynamometer will display the tension in real time.

[0018] Step 3: Start the electric hydraulic jack, the piston rod pushes the column up, adjusts the force transmission of the support rod, tightens the mechanism to further apply force, and observes the electronic force meter value;

[0019] Step 4: When the value reaches the test requirement, stop applying force to the hydraulic jack and test the strength of the deck fasteners;

[0020] Step 5: After the test is completed, lower the piston rod of the hydraulic jack and the column falls back. When the electronic force meter value reaches single digits or zero, stop the machine. Wait until the column lands smoothly, loosen the tightening mechanism, and disassemble the parts to complete the process.

[0021] In summary, the present invention has at least one of the following beneficial effects:

[0022] 1. This invention improves operational efficiency and safety by using an electro-hydraulic hydraulic jack. It also adopts a flexible tightening mechanism and diverse connection points to achieve efficient testing of different types of deck fasteners. It can promptly verify whether the strength of deck fasteners meets the standards of various classification societies, thereby ensuring the safety of ro-ro ships and their cargoes.

[0023] 2. The present invention provides a test deck that simulates the actual deck environment of a ro-ro ship, instead of conducting the test directly on the hull deck, thereby avoiding damage to the hull deck and reducing the impact of the test on the ship itself.

[0024] 3. The present invention adjusts the angle of the fixing to an appropriate angle within the range of 15° to 75° by adjusting the support rod and the limit seat, and cooperates with the hydraulic jack to provide driving forces of different strengths. This meets the testing requirements of deck fasteners at multiple angles and with different external force strengths. In addition, the data obtained from actual tests on the simulated test deck can serve as the basis for the design and manufacture of ro-ro ship decks and the design of cargo lashings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0026] Figure 1 This is a schematic structural diagram of Example 1 of the present invention;

[0027] Figure 2 This is a schematic structural diagram of Example 2 of the present invention;

[0028] Figure 3 This is a schematic structural diagram of Example 3 of the present invention;

[0029] Figure 4 This is a schematic structural diagram of Example 4 of the present invention;

[0030] Figure 5 This is a schematic structural diagram of Example 5 of the present invention;

[0031] Figure 6 It is a three-dimensional structural diagram of the chain tightener in the tightening mechanism of the present invention;

[0032] Figure 7 A top view of a chain tightener in the tightening mechanism of the present invention;

[0033] Figure 8 is a three-dimensional structural diagram of a belt-type tightener in the tightening mechanism of the present invention;

[0034] Figure 9 A top view of a belt tightener in the tightening mechanism of the present invention;

[0035] Figure 10 This is a schematic diagram of the structure of the test deck of Example 1 of the present invention;

[0036] Figure 11 This is a schematic diagram of the structure of the test deck of Example 2 of the present invention;

[0037] Figure 12 This is a schematic diagram of the structure of the test deck of Example 3 of the present invention;

[0038] Figure 13 This is a schematic diagram of the structure of the test deck of Example 4 of the present invention;

[0039] Figure 14 This is a schematic diagram of the structure of the test deck of Example 5 of the present invention.

[0040] Description of reference numerals:

[0041] 1. Test deck; 101. Embedded base; 102. First cleat D-ring; 103. Wave rod; 104. Lashing strap hole; 105. Second cleat D-ring; 2. Hydraulic jack; 3. Column; 4. Adjustment rod; 401. Limit seat; 5. Electronic dynamometer; 501. Tensioning connection end; 502. Deck connection end; 6. Chain tensioner; 601. First threaded bracket; 602. Second threaded bracket; 603. Handwheel; 604. Bidirectional screw; 605. Wrench body; 606. Wrench shaft; 607. U-shaped groove; 608. Anti-drop plug; 7. Lifting chain; 8. Belt tensioner; 801. Tensioning strap; 802. Lashing hook; 9. Flexible lashing strap; 10. Elephant foot; 11. Butterfly buckle. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] The embodiment of the present invention discloses a method and a device for testing a fixing piece for securing cargo on a roll-on / roll-off ship.

[0044] Example 1

[0045] Reference Figure 1-10 , which is the first embodiment of the present invention, provides a method and device for testing fixings for ro-ro cargo securing. The testing device for fixings for ro-ro cargo securing comprises a test deck 1, on which is provided a deck fastener for testing. The test deck 1 is also provided with a hydraulic jack 2 for driving a column 3. The test deck 1 is also provided with a tightening mechanism for tensioning. An electronic dynamometer 5 is further provided on the side of the column 3 away from the tensioning mechanism. The electronic dynamometer 5 and the tightening mechanism are respectively connected to the test deck 1 via corresponding deck connecting mechanisms, and the electronic dynamometer 5 is located at the bottom of the test deck 1. Between the tightening mechanism and the deck connection mechanism, the end of the piston rod of the hydraulic jack 2 away from the test deck 1 is fixedly connected to the column 3, and an inclined adjustment support rod 4 is installed on the column 3. The top of the adjustment support rod 4 is fixedly connected to the column 3, and the end of the adjustment support rod 4 close to the test deck 1 is provided with a limit seat 401 that abuts against the test deck 1, and the limit seat 401 is fixedly connected to the bottom end of the corresponding adjustment support rod 4. The test deck 1 simulates the actual deck environment of the ro-ro ship, providing a stable installation and operation platform for the entire test, which can replace the direct test on the hull deck. Test to avoid damage to the hull deck. The deck fasteners are the objects to be tested, and their performance directly affects the reliability of cargo securing. The hydraulic jack 2 can provide a stable driving force for the column 3. By adjusting the magnitude of its output force, it can simulate external forces of different strengths acting on the fasteners. It is best to choose an electric hydraulic type to improve the work efficiency during the test while also taking into account the safety of the test operation. The tightening mechanism can adjust its own tension and apply different tensions to the deck fasteners for pre-tightening, thereby improving the safety of the entire device. The electronic dynamometer 5 can accurately measure the tightening in real time. The magnitude of the pulling force applied by the mechanism to the fixing part provides a key basis for obtaining the test data. The hydraulic jack 2 cooperates with the column 3 to adjust the direction of the applied force to meet the multi-angle testing requirements. The adjusting support rod 4 can limit the position of the adjusting support rod 4 through the limit seat 401 to ensure that it functions stably during the test, and the angle adjustment range is within the range of 15° to 75°. The limit seat 401 and the adjusting support rod 4 only support the column 2. The specific angle adjustment is achieved by changing the position of the contact point between the column 3 and the lifting chain 7 or the binding belt 9.

[0046] The two ends of the electronic dynamometer 5 are hingedly connected to a tensioning connection end 501 and a deck connection end 502, and the electronic dynamometer 5 is connected to the tightening mechanism and the deck connection mechanism through the tensioning connection end 501 and the deck connection end 502 respectively. The hinged cooperation between the electronic dynamometer 5 and the tensioning connection end 501 and the deck connection end 502 enables the electronic dynamometer 5 to adapt to changes in a certain angle during the force process, avoid affecting the measurement accuracy due to angle problems, and realize the connection between force transmission and measurement.

[0047] The tightening mechanism consists of a chain tightener 6 and a lifting chain 7 or a belt tightener 8 and a flexible lashing belt 9, and the end of the column 3 away from the test deck 1 is respectively abutted and connected with the lifting chain 7 or the flexible lashing belt 9, the end of the lifting chain 7 away from the chain tightener 6 is connected to the electronic dynamometer 5 through the tensioning connection end 501, and the end of the flexible lashing belt 9 away from the belt tightener 8 is also connected to the electronic dynamometer 5 through the tensioning connection end 501. The combination of the chain tightener 6 and the lifting chain 7 or the belt tightener 8 and the flexible lashing belt 9 in the tightening mechanism can be selected according to different test requirements and the type of deck fasteners, thereby enhancing the versatility of the device. The hydraulic jack 2 generates tension in the lifting chain 7 or the flexible lashing belt 9 through the force of the column 3, and transmits the tension from the tightening mechanism to the electronic dynamometer 5 through the tensioning connection end 501.

[0048] The chain tightener 6 includes a first threaded frame 601 and a second threaded frame 602. A handwheel portion 603 driven by a wrench body 605 is provided between the first threaded frame 601 and the second threaded frame 602. A bidirectional screw 604 is fixedly mounted on the handwheel portion 603. The two ends of the bidirectional screw 604 are respectively connected to the first threaded frame 601 and the second threaded frame 602 through threaded engagement. A wrench shaft 606 is hingedly connected to the wrench body 605, and the wrench body 605 is rotatably connected to the handwheel portion 606 through the wrench shaft 606. 3, the operator can drive the handwheel part 603 to rotate by rotating the wrench body 605. The first threaded frame 601 and the second threaded frame 602 are respectively U-shaped bodies with threads. When the handwheel part 603 drives the bidirectional screw 604 to rotate, the first threaded frame 601 and the second threaded frame 602 will move closer to or away from each other along the axis direction of the bidirectional screw 604, thereby tightening or loosening the lifting chain 7. The wrench shaft 606 allows the wrench body 605 to rotate flexibly, making it convenient for the operator to apply force.

[0049] The first threaded rack 601 and the second threaded rack 602 are both provided with a U-shaped groove 607 at one end away from the handwheel part 603, and the U-shaped groove 607 is provided with a limit pin for limiting the movement of the lifting chain 7. The limit pin in the U-shaped groove 607 extends to the end outside the U-shaped groove 607 and is disassembled and installed with an anti-drop plug 608. The limit pin in the U-shaped groove 607 is installed on the corresponding first threaded rack 601 through an anti-drop rope. The U-shaped groove 607 is used to accommodate the chain links of the lifting chain 7. The limit pin can prevent the lifting chain 7 from sliding in the U-shaped groove 607 to ensure the stability of the tension transmission. The anti-drop plug 608 can prevent the limit pin from falling off from the U-shaped groove 607, further enhancing the reliability of the connection and facilitating disassembly and assembly. The anti-drop rope can prevent the limit pin from accidentally falling off, thereby improving the safety of the device. The anti-drop rope is only connected to the limit pin at the left end, and the connecting pin at the right end is not connected.

[0050] A tightening belt 801 is provided on the side of the belt tightener 8 away from the flexible binding belt 9. The tightening belt 801 and the end of the flexible binding belt 9 away from the belt tightener 8 are respectively provided with a binding hook 802 connected to the test deck 1. The end of the flexible binding belt 9 away from the belt tightener 8 is connected to the tensioning connection end 501 through the binding hook 802. The belt tightener 8 is a relatively mature technical means in the existing technology and will not be elaborated here. The binding hook 802 can be quickly and firmly connected to the tensioning connection end 501 or the corresponding structure on the test deck 1, which is convenient for the installation and disassembly of the device, realizes the connection between the flexible binding belt 9 and the electronic dynamometer 5, and completes the construction of the tension transmission path.

[0051] The deck connection mechanism is an elephant foot 10 or a butterfly buckle 11. Both the elephant foot 10 and the butterfly buckle 11 are connected to the electronic dynamometer 5 through the deck connection end 502. The ends of the elephant foot 10 and the butterfly buckle 11 away from the test deck 1 are respectively connected to the corresponding U-shaped groove 607. As connecting components, the elephant foot 10 and the butterfly buckle 11 can stably connect the electronic dynamometer 5 or the chain tightener 6 to the test deck 1, so that the entire test system forms a complete force transmission closed loop.

[0052] The test deck 1 is evenly spaced with fixings or lashing holes 104, which include an embedded base 101 or a first splint D-ring 102 or a wave rod 103 or a second splint D-ring 105. The embedded base 101 is connected to the second threaded bracket 602 through the elephant foot 10, the first splint D-ring 102, the wave rod 103 and the second splint D-ring 105 are respectively adapted to the butterfly buckle 11. The lashing hole 104 is connected to the tightening belt 801 through the lashing hook 802. The structure of the fixings and the lashing hole 104 is a deck connection mechanism and a tightening mechanism. The structure provides a variety of connection points to meet the testing requirements of different types of fixings. The embedded base 101 can meet the stable installation of the test deck 1 through the elephant foot 10 and the second threaded bracket 602. The butterfly buckle 11 can be connected to the test deck 1 having the first splint D-ring 102 and the wave rod 103 and the second splint D-ring 105 respectively, thereby meeting the testing requirements of different fixings. The first splint D-ring 102 and the second splint D-ring 105 are both composed of two parts, a D-ring and a splint. The only difference is that the D-ring in the second splint D-ring 105 is slightly smaller in size.

[0053] When using the present device to test the test deck 1 having the embedded base 101, the chain tightener 6 is first adjusted to the maximum stroke position by the wrench body 605, that is, the screw end of the bidirectional screw 604 is flush with the inner side walls of the first threaded frame 601 and the second threaded frame 602, and then the column 3 is connected to the support rod 4 to adjust the column 3 to a suitable height (that is, the force angle of the fixing member on the test deck 1 must comply with the classification society's specifications). During this process, the angle of the fixing member can be adjusted to a suitable angle within the range of 15° to 75° by adjusting the support rod 4 and the limit seat 401 to meet the force direction requirements of the multi-angle test;

[0054] Place the device in the middle of the two embedded bases 101 of the test deck 1 (on the connecting line of the two embedded bases 101). Hang the two elephant feet 10 in the closest cross slots of the two embedded bases 101. Then assemble and connect the elephant feet 10, deck connection end 502, electronic dynamometer 5, tensioning connection end 501, lifting chain 7, and chain tensioner 6 in sequence, and hang them on the column 3. Rotate the wrench body 605 to tighten the chain tensioner 6, straightening the lifting chain 7 of the test device and achieving the test use state. This will apply pre-tightening force to the deck fasteners and improve the safety of the device.

[0055] Power on the hydraulic station of the hydraulic jack 2, turn on the switch, extend the piston rod, and raise the column 3. Pay attention to the changes in the value of the electronic dynamometer 5 until the displayed value on the electronic dynamometer 5 meets the test requirements. Then, power off and stop applying force to the hydraulic jack 2. The hydraulic jack 2 can stably output driving forces of different sizes to simulate external forces of different intensities.

[0056] When withdrawing the experimental device, the operation is opposite to the assembly steps. After the test is completed and the data obtained is recorded, the hydraulic station of the hydraulic jack 2 is powered on, the switch is turned on, the piston rod of the jack 2 is retracted, the column 3 is downward, and the change in the counter value of the electronic force measurement 5 is observed. When the value displayed is a single digit or zero, the hydraulic station of the hydraulic jack 2 can be powered off, and the limit seat 401 connected to the four adjustment support rods 4 of the column 3 can be checked to see if it has landed smoothly on the simulated test deck 1. The wrench body 605 is rotated in the opposite direction to loosen the chain tensioner 6 to relax the lifting chain of the test device to achieve a detachable state. With the help of the anti-drop plugs 608 in each U-shaped groove 607, the various components are disassembled and put back in place for the next operation.

[0057] Example 2

[0058] Reference Figure 1-11 , which is the second embodiment of the present invention, differs from the first embodiment in that:

[0059] When using this device to test the test deck 1 with the first plywood D-ring, the difference compared to Example 1 is that the deck connection end 502 connected to the electronic dynamometer 5 is connected to the first plywood D-ring 102 on the test deck 1 using a butterfly buckle 11, and the second threaded rack 602 on the chain tightener 6 used can be directly connected to the first plywood D-ring 102 through the cooperation of the U-shaped groove 607 and the anti-disconnection plug 608.

[0060] The remaining structures are the same as those of Example 1.

[0061] Example 3

[0062] Reference Figure 1-12 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that:

[0063] During the process of using this device to test the test deck 1 with the wave rod 103, the difference compared to Example 2 is that the deck connection end 502 connected to the electronic dynamometer 5 is connected to the wave rod 103 on the test deck 1 using a butterfly buckle 11, and the second threaded rack 602 on the chain tightener 6 can be directly connected to the wave rod 103 through the cooperation of the U-shaped groove 607 and the anti-disconnection plug 608.

[0064] The rest of the structure is the same as that of Example 2

[0065] Example 4

[0066] Reference Figure 1-13 , which is the fourth embodiment of the present invention. This embodiment is different from the third embodiment in that:

[0067] When using this device to test the test deck 1 with the second splint D-ring 105, the difference compared to Example 3 is that the deck connection end 502 connected to the electronic dynamometer 5 is connected to the second splint D-ring 105 on the test deck 1 using a butterfly buckle 11, and the second threaded rack 602 on the chain tightener 6 can be directly connected to the second splint D-ring 105 through the cooperation of the U-shaped groove 607 and the anti-disconnection plug 608.

[0068] The rest of the structure is the same as that of Example 3

[0069] Example 5

[0070] Reference Figure 1-14 , which is the fifth embodiment of the present invention. This embodiment is different from the fourth embodiment in that:

[0071] During the process of using this device to test the test deck 1 having a wave rod 103 and a lashing strap hole 104, the difference compared to Example 4 is that the deck connection end 502 connected to the electronic dynamometer 5 is connected to the wave rod 103 on the test deck 1 using a butterfly buckle 11, and the flexible lashing strap 9 connected to the belt tightener 8 is connected to the tensioning connection end 501 connected to the electronic dynamometer 5 through a lashing hook 802, and the tightening strap 801 connected to the belt tightener 8 is connected to the lashing strap hole 104 on the test deck 1 through a lashing hook 802.

[0072] The remaining structures are the same as those of Example 4.

[0073] A method for testing a fixing for securing cargo on a roll-on / roll-off ship comprises the following steps:

[0074] Step 1: When using the device, first use the test deck 1 as a platform. Depending on the type of deck fastener to be tested, select the appropriate deck connection mechanism (e.g., foot 10 or butterfly buckle 11) and the tightening mechanism (chain tightener 6 and lifting chain 7, or belt tightener 8 and flexible lashing strap 9). Complete the assembly and adjust the angle of the fixings to a suitable angle within the range of 15° to 75° by adjusting the support rod 4 and the limit seat 401.

[0075] Step 2: Turn the wrench body 605 of the chain tensioner 6 or operate the belt tensioner 8 to adjust the tension of the tensioning mechanism and apply pre-tightening force to the deck fasteners. The electronic dynamometer 5 displays the tension in real time.

[0076] Step 3: Start the electric hydraulic jack 2, the piston rod pushes the column 3 up, and the force is transmitted by adjusting the support rod 4. The tightening mechanism further applies force and the value of the electronic dynamometer 5 is observed;

[0077] Step 4: When the value reaches the test requirement, stop applying force to the hydraulic jack 2 and test the strength of the deck fasteners;

[0078] Step 5: After the test is completed, lower the piston rod of the hydraulic jack 2, and the column 3 falls back. When the value of the electronic dynamometer 5 reaches the single digit or zero, stop the machine. Wait until the column 3 lands smoothly, loosen the tightening mechanism, and disassemble the parts to complete the process.

[0079] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A test device for fixings for ro-ro cargo securing, characterized by: The invention comprises a test deck (1), wherein the test deck (1) is provided with a deck fastener for testing, the test deck (1) is further provided with a hydraulic jack (2) for driving a column (3), the test deck (1) is further provided with a tightening mechanism for tensioning, an electronic dynamometer (5) is further provided on a side of the column (3) away from the tightening mechanism, and the electronic dynamometer (5) and the tightening mechanism are respectively connected to the test deck (1) via corresponding deck connecting mechanisms, and the electronic dynamometer (5) is located between the tightening mechanism and the deck connecting mechanism; The piston rod of the hydraulic jack (2) is fixedly connected to the column (3) at one end away from the test deck (1); an adjusting support rod (4) with an inclined distribution is installed on the column (3); the top end of the adjusting support rod (4) is fixedly connected to the column (3); the end of the adjusting support rod (4) close to the test deck (1) is provided with a limit seat (401) that abuts against the test deck (1), and the limit seat (401) is connected to the bottom end of the corresponding adjusting support rod (4).

2. The testing device for ro-ro cargo securing fixtures according to claim 1, characterized in that: The two ends of the electronic dynamometer (5) are respectively hingedly connected to a tensioning connection end (501) and a deck connection end (502), and the electronic dynamometer (5) is respectively connected to a tightening mechanism and a deck connection mechanism via the tensioning connection end (501) and the deck connection end (502).

3. The testing device for ro-ro cargo securing fixtures according to claim 1, characterized in that: The tightening mechanism is composed of a chain tightener (6) and a lifting chain (7) or a belt tightener (8) and a flexible lashing belt (9), and one end of the column (3) away from the test deck (1) is respectively connected to the lifting chain (7) or the flexible lashing belt (9), the end of the lifting chain (7) away from the chain tightener (6) is connected to the electronic dynamometer (5) through a tensioning connection end (501), and the end of the flexible lashing belt (9) away from the belt tightener (8) is also connected to the electronic dynamometer (5) through a tensioning connection end (501).

4. The testing device for ro-ro cargo securing fixtures according to claim 3, characterized in that: The chain tightener (6) comprises a first threaded frame (601) and a second threaded frame (602); a handwheel portion (603) driven by a wrench body (605) is further provided between the first threaded frame (601) and the second threaded frame (602); a bidirectional screw rod (604) is fixedly mounted on the handwheel portion (603); two ends of the bidirectional screw rod (604) are respectively threadedly connected to the first threaded frame (601) and the second threaded frame (602); a wrench rotating shaft (606) is hingedly connected to the wrench body (605), and the wrench body (605) is rotatably connected to the handwheel portion (603) via the wrench rotating shaft (606).

5. The testing device for ro-ro cargo securing fixtures according to claim 4, characterized in that: The first threaded frame (601) and the second threaded frame (602) are both provided with a U-shaped groove (607) at one end away from the handwheel portion (603), and a limit pin for limiting the movement of the lifting chain (7) is provided in the U-shaped groove (607). An anti-drop plug (608) is installed on one end of the limit pin in the U-shaped groove (607) extending outside the U-shaped groove (607). The limit pin in the U-shaped groove (607) is installed on the corresponding first threaded frame (601) through an anti-drop rope.

6. The testing device for ro-ro cargo securing fixtures according to claim 3, characterized in that: A tightening belt (801) is provided on one side of the belt tightener (8) away from the flexible lashing belt (9); the tightening belt (801) and one end of the flexible lashing belt (9) away from the belt tightener (8) are respectively provided with a lashing hook (802) connected to the test deck (1); and the end of the flexible lashing belt (9) away from the belt tightener (8) is connected to the tensioning connection end (501) via the lashing hook (802).

7. The testing device for ro-ro cargo securing fixtures according to claim 1, characterized in that: The deck connection mechanism is an elephant foot (10) or a butterfly buckle (11), and both the elephant foot (10) and the butterfly buckle (11) are connected to the electronic dynamometer (5) via the deck connection end (502), and the ends of the elephant foot (10) and the butterfly buckle (11) away from the test deck (1) are respectively connected to corresponding U-shaped grooves (607).

8. The testing device for ro-ro cargo securing fixtures according to claim 7, characterized in that: The test deck (1) is provided with fixing parts or lashing holes (104) arranged at equal intervals, wherein the fixing parts include an embedded base (101) or a first splint D-shaped ring (102) or a wave rod (103) or a second splint D-shaped ring (105), and the embedded base (101) is connected to the second threaded frame (602) through an elephant foot (10), the first splint D-shaped ring (102) and the wave rod (103) and the second splint D-shaped ring (105) are respectively adapted to the butterfly buckle (11), and the lashing hole (104) is connected to the tightening belt (801) through a lashing hook (802).

9. A method for testing a ro-ro cargo securing fixture, which is applied to the ro-ro cargo securing fixture testing device of claim 8, characterized in that: The following steps are involved: Step 1: When using the device, first use the test deck (1) as a platform, select the appropriate deck connection mechanism elephant foot (10) or butterfly buckle (11) and tightening mechanism chain tightener (6) and lifting chain (7), or belt tightener (8) and flexible lashing belt (9) according to the type of deck fastener to be tested, complete the assembly, and adjust the angle of the fixing member to a suitable angle within the range of 15° to 75° by adjusting the support rod (4) and the limit seat (401); Step 2: rotating the wrench body (605) of the chain tightener (6) or operating the belt tightener (8) to adjust the tension of the tightening mechanism, applying pre-tightening force to the deck fasteners, and the electronic dynamometer (5) displays the tension in real time; Step 3: Start the electric hydraulic jack (2), the piston rod pushes the column (3) upward, the force is transmitted by adjusting the support rod (4), the tightening mechanism further applies force, and the value of the electronic dynamometer (5) is observed; Step 4: When the value reaches the test requirement, stop applying force to the hydraulic jack (2) and test the strength of the deck fasteners; Step 5: After the test is completed, the piston rod of the hydraulic jack (2) is lowered, the column (3) falls back, and the electronic dynamometer (5) stops when the value is in the single digit or zero. When the column (3) lands smoothly, the tightening mechanism is loosened and the parts are disassembled to complete the process.

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