Lifting capacity measuring device, measuring method and lifting equipment

Abstract

The invention discloses a lifting capacity measuring device and method and lifting equipment. The lifting capacity measuring device comprises a measuring assembly and a controller. The measuring assembly comprises a tension ring sensor, a mounting support and a lifting pulley, the upper end of the tension ring sensor and the first end of the mounting support are sequentially hinged to the cargo boom at intervals in the length direction of the cargo boom, the lower end of the tension ring sensor is hinged to the second end of the mounting support, and the lifting pulley is arranged on the mounting support and can be wound by a lifting rope. The controller is in communication connection with the tension ring sensor and is configured to calculate the lifting capacity according to the detection value of the tension ring sensor, the inclination angle of the cargo boom and the lowering height of the lifting rope, the inclination angle of the cargo boom is added into calculation of the lifting capacity, and the accuracy of lifting capacity measurement is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of lifting equipment, and specifically relates to a lifting capacity measuring device, a measuring method and a lifting equipment. Background Art

[0002] Lifting equipment is a mechanical device used to raise, move and lower heavy objects. Lifting equipment is widely used in construction sites, ports, factories, warehouses and other places, mainly used for handling and loading and unloading heavy objects such as steel, prefabricated concrete parts, mechanical equipment, etc.

[0003] In construction, changes in lifting weight directly affect the stability and safety of lifting equipment. Overloading may cause lifting equipment to overturn, equipment damage, or even casualties. Therefore, real-time acquisition of lifting weight information helps ensure that lifting equipment operates within a safe load range and avoids potential accidents.

[0004] At present, the tension ring lifting weight measurement device is widely used in flat-arm tower cranes. The single rope tension of the hoisting rope indirectly acts on the tension ring sensor to generate tension. The tension ring sensor identifies the deformation of its internal structure to reflect the weight change of the hoisted cargo. However, the variable amplitude movement of the boom tower crane is accompanied by the change of the boom inclination angle, and the tension value of the tension ring sensor will change accordingly. The change of the boom inclination angle will affect the measurement data and produce the lifting weight accuracy error. Summary of the invention

[0005] In view of the above-mentioned defects or shortcomings, the present application provides a lifting weight measuring device, a measuring method and a lifting equipment, aiming to solve the technical problem that the change of the inclination angle of the crane arm will affect the measurement data and cause the lifting weight accuracy error.

[0006] In order to achieve the above-mentioned purpose, the present application provides a lifting capacity measuring device, wherein the lifting capacity measuring device includes a measuring assembly and a controller. The measuring assembly includes a tension ring sensor, a mounting bracket and a lifting pulley, the upper end of the tension ring sensor and the first end of the mounting bracket are hinged to the lifting arm at intervals in sequence along the length direction of the lifting arm, and the lower end of the tension ring sensor is hinged to the second end of the mounting bracket, and the lifting pulley is arranged on the mounting bracket and can be wound around the lifting rope. The controller is communicatively connected to the tension ring sensor and is configured to calculate the lifting capacity according to the detection value of the tension ring sensor, the inclination angle of the lifting arm and the lowering height of the lifting rope.

[0007] In the embodiment of the present application, the calculation of the lifting weight according to the detection value of the tension ring sensor, the inclination angle of the crane arm and the lowering height of the lifting rope includes:

[0008] Determine the single rope tension of the hoisting rope according to the detection value of the tension ring sensor and the inclination angle of the crane arm;

[0009] The lifting capacity is determined based on the single rope tension of the lifting rope and the lowering height of the lifting rope.

[0010] In the embodiment of the present application, determining the single rope tension of the lifting rope according to the detection value of the tension ring sensor and the inclination angle of the crane arm includes:

[0011] Substitute the detection value of the tension ring sensor and the inclination angle of the crane arm into the first calculation formula to calculate to obtain the single rope tension of the lifting rope, wherein the first calculation formula is:

[0012]

[0013] In the formula, F is set as the single rope tension of the lifting rope, N is set as the detection value of the tension ring sensor, and M is c Set as the weight of the mounting bracket, L c Set as the distance between the center of gravity of the mounting bracket and the hinge point of the boom, L b is set as the force arm of the tension ring sensor, γ is set as the angle between the mounting bracket and the crane arm, θ is set as the tilt angle of the crane arm, L a Set as the moment arm of the resultant force of the lifting pulley, and α as the angle of the lifting rope.

[0014] In the first embodiment of the present application, the lifting rope is used to lift heavy objects, and determining the lifting weight according to the single rope tension of the lifting rope and the lowering height of the lifting rope includes:

[0015] Substitute the single rope tension of the lifting rope and the lowering height of the lifting rope into the second calculation formula to calculate the lifting weight, where the second calculation formula is:

[0016] G=Fg 0 ×H

[0017] In the formula, G is set as the lifting weight, F is set as the single rope tension of the lifting rope, g 0 Let be the unit weight of the lifting rope, and H let be the lowering height of the lifting rope.

[0018] In a second embodiment of the present application, the lifting weight measuring device is set to single-rate lifting, and the lifting weight measuring device also includes a first hook, which is connected to the lifting rope and is used to lift the weight;

[0019] The lifting capacity is determined based on the single rope tension of the lifting rope and the lowering height of the lifting rope, including:

[0020] Substitute the single rope tension of the lifting rope and the lowering height of the lifting rope into the third calculation formula to calculate and obtain the lifting weight, wherein the third calculation formula is:

[0021] G=Fg 0 ×Hg 1

[0022] In the formula, G is set as the lifting weight, F is set as the single rope tension of the lifting rope, g 0 Set as the unit weight of the lifting rope, H as the lowering height of the lifting rope, g 1 Set as the weight of the first hook.

[0023] In a third embodiment of the present application, the lifting weight measuring device is configured to be a multi-rate lifting device, and the lifting weight measuring device further comprises a second hook, the second hook comprising a hook head and a lifting pulley block, the lifting rope is wound around the lifting pulley block, the hook head is connected to the lifting pulley block and is used to lift the weight;

[0024] The lifting capacity is determined based on the single rope tension of the lifting rope and the lowering height of the lifting rope, including:

[0025] Substitute the single rope tension of the lifting rope and the lowering height of the lifting rope into the fourth calculation formula to calculate and obtain the lifting weight, wherein the fourth calculation formula is:

[0026] G=F×mg 0 ×H×mg 2

[0027] In the formula, G is set as the lifting weight, F is set as the single rope tension of the lifting rope, g 0 Set as the unit weight of the lifting rope, H as the lowering height of the lifting rope, g 2 Set as the weight of the second hook, and m as the multiplier of the lifting pulley block.

[0028] In an embodiment of the present application, the lifting pulley includes a wheel body, a rotating shaft, a rope-stopping rod and two mounting ear plates. The wheel body is rotatably connected to the mounting bracket through the rotating shaft. The two mounting ear plates are sleeved outside the rotating shaft. The wheel body and the rope-stopping rod are both located between the two mounting ear plates. A limited position channel is formed between the rope-stopping rod and the wheel body, and the lifting rope is located in the limited position channel.

[0029] Secondly, the present application also provides a lifting weight measurement method, which is applied to the lifting weight measurement device as described above and includes:

[0030] The lifting weight is calculated based on the detection value of the tension ring sensor, the inclination angle of the crane arm and the lowering height of the lifting rope, and the lifting equipment is controlled to stop if the lifting weight exceeds the standard.

[0031] In an embodiment of the present application, the lifting weight is calculated according to the detection value of the tension ring sensor, the inclination angle of the crane arm and the lowering height of the lifting rope, and the lifting equipment is controlled to stop when the lifting weight exceeds the standard, including:

[0032] Obtaining the initial value of the lowering height of the hoisting rope and the initial value of the tilt angle of the crane arm respectively;

[0033] When it is determined that the lifting rope is in an unloaded state, an initial value of the detection value of the tension ring sensor is obtained, and an initial value of the lifting weight is calculated according to an initial value of the lowering height of the lifting rope, an initial value of the inclination angle of the lifting arm, and an initial value of the detection value of the tension ring sensor;

[0034] When it is determined that the lifting rope is in a loaded state, the real-time value of the detection value of the tension ring sensor is obtained in real time, and the real-time value of the lifting weight is calculated according to the real-time value of the lowering height of the lifting rope, the real-time value of the inclination angle of the lifting arm and the real-time value of the detection value of the tension ring sensor;

[0035] The actual lifting weight is calculated based on the initial lifting weight value and the real-time lifting weight value;

[0036] If the actual lifting weight is greater than the preset value, the lifting equipment will be stopped.

[0037] In addition, the present application also provides a lifting device, which includes the lifting weight measuring device as described above.

[0038] Through the above technical solution, the lifting weight measuring device provided in the embodiment of the present application has the following beneficial effects:

[0039] In the technical solution of the present application, the upper end of the tension ring sensor is hinged to the boom, the lower end of the tension ring sensor is hinged to the second end of the mounting bracket, and both ends of the tension ring sensor are hingedly connected so that the two ends of the tension ring sensor are evenly stressed. The first end of the mounting bracket is hinged to the boom, and the tension ring sensor and the mounting bracket are distributed along the length direction of the boom. The lifting pulley is arranged on the mounting bracket, and the lifting rope is wound around the lifting pulley. The lifting rope is used to connect with the weight. The lifting pulley rotates so that the lifting rope drives the weight to move, so that the vertical position of the weight changes to achieve the lifting and lowering of the weight. The rotation of the boom changes the horizontal position of the weight to achieve the driving of the weight to move. A lever structure is formed between the tension ring sensor and the lifting pulley, and the single rope tension of the lifting rope is transformed by the lever structure and acts on the tension ring sensor.

[0040] The controller is connected to the tension ring sensor in communication, and the detection value of the tension ring sensor is transmitted to the controller. The controller calculates the lifting weight according to the detection value of the tension ring sensor, the inclination angle of the crane arm, and the lowering height of the lifting rope. The accuracy of the lifting weight measurement can be significantly improved by adding the inclination angle of the crane arm to the calculation of the lifting weight. Because the angle of the crane arm will directly affect the distribution of the force applied to the lifting rope and the lifting weight measurement device, thereby affecting the working state and lifting capacity of the lifting equipment. In addition, the lifting weight measurement method can be applied to boom lifting equipment and flat arm lifting equipment, which expands the scope of application of the lifting weight measurement device, making the lifting weight measurement device have strong practicality in a variety of lifting equipment.

[0041] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0043] Figure 1 is a structural schematic diagram of a weight measurement device according to an embodiment of the present application;

[0044] Figure 2 It is a force analysis diagram when the lifting arm of the lifting weight measuring device is at a first tilt angle according to an embodiment of the present application;

[0045] Figure 3 It is a force analysis diagram when the lifting arm of the lifting weight measuring device in one embodiment of the present application is at a second tilt angle;

[0046] Figure 4 It is a schematic diagram of the connection structure between the hoisting rope and the first hook in the hoisting weight measuring device according to one embodiment of the present application;

[0047] Figure 5 It is a schematic diagram of the connection structure between the lifting rope and the lifting pulley block in the lifting weight measuring device according to one embodiment of the present application;

[0048] Figure 6 is a structural schematic diagram of a weight measuring device according to another embodiment of the present application;

[0049] Figure 7 is a structural schematic diagram of a weight measuring device according to another embodiment of the present application;

[0050] Figure 8 is a structural schematic diagram of a weight measuring device according to yet another embodiment of the present application;

[0051] Fig. 9 It is a schematic diagram of the steps of a weight measurement method according to an embodiment of the present application.

[0052] Description of Reference Numerals

[0053] 100 Lifting weight measuring device 22 Lifting pulley block

[0054] 11 Tension ring sensor 221 driving wheel

[0055] 12 Mounting bracket 222 Mounting plate

[0056] 121 first end 31 first fixed wheel

[0057] 122 second end 32 second fixed wheel

[0058] 13 Lifting pulley 40 First hook

[0059] 131 wheel body 50 lifting arm

[0060] 132 rotating shaft 51 first ear plate

[0061] 133 Rope blocking rod 52 Second ear plate

[0062] 134 Install the ear plate 53 upper chord

[0063] 20 Second hook 54 Lower chord

[0064] 21 Hook 60 Lifting Rope DETAILED DESCRIPTION

[0065] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0066] The following describes the lifting capacity measuring device, measuring method and lifting equipment of the present application with reference to the accompanying drawings.

[0067] like Figures 1 to 8 As shown, the present application provides a lifting capacity measuring device 100, wherein the lifting capacity measuring device 100 includes a measuring assembly and a controller. The measuring assembly includes a tension ring sensor 11, a mounting bracket 12 and a lifting pulley 13, wherein the upper end of the tension ring sensor 11 and the first end 121 of the mounting bracket 12 are hinged to the lifting arm 50 at intervals in the length direction of the lifting arm 50, and the lower end of the tension ring sensor 11 is hinged to the second end 122 of the mounting bracket 12, and the lifting pulley 13 is arranged on the mounting bracket 12 and can be wound around the lifting rope 60. The controller is connected to the tension ring sensor 11 in communication and is configured to calculate the lifting capacity according to the detection value of the tension ring sensor 11, the inclination angle of the lifting arm 50 and the lowering height of the lifting rope 60.

[0068] The upper end of the tension ring sensor 11 is hinged to the lifting arm 50, and the lower end of the tension ring sensor 11 is hinged to the second end 122 of the mounting bracket 12. Both ends of the tension ring sensor 11 are hingedly connected, so that both ends of the tension ring sensor 11 are evenly stressed. The first end 121 of the mounting bracket 12 is hinged to the lifting arm 50, and the tension ring sensor 11 and the mounting bracket 12 are distributed along the length direction of the lifting arm 50. The lifting pulley 13 is arranged on the mounting bracket 12, and the lifting rope 60 is wound around the lifting pulley 13. The lifting rope 60 is used to connect with the weight. The lifting pulley 13 rotates so that the lifting rope 60 drives the weight to move, so that the vertical position of the weight changes, so as to achieve the lifting and lowering of the weight. The rotation of the lifting arm 50 changes the horizontal position of the weight, so as to achieve the driving of the weight to move. A lever structure is formed between the tension ring sensor 11 and the lifting pulley 13 , and the single rope tension of the lifting rope 60 is transformed through the lever structure and acts on the tension ring sensor 11 .

[0069] The controller is connected to the tension ring sensor 11 in communication, and the detection value of the tension ring sensor 11 is transmitted to the controller. The controller calculates the lifting weight according to the detection value of the tension ring sensor 11, the inclination angle of the lifting arm 50 and the lowering height of the lifting rope 60. The inclination angle of the lifting arm 50 is added to the calculation of the lifting weight, which can significantly improve the accuracy of the lifting weight measurement. Because the angle of the lifting arm 50 will directly affect the distribution of the force applied to the lifting rope 60 and the lifting weight measurement device 100, thereby affecting the working state and lifting capacity of the lifting equipment. In addition, the lifting weight measurement method can be applied to boom lifting equipment and flat arm lifting equipment, which expands the scope of application of the lifting weight measurement device 100, so that the lifting weight measurement device 100 has strong practicality in a variety of lifting equipment.

[0070] The lifting rope 60 can be a steel wire rope, which has a high tensile strength and can bear a large load, and is suitable for lifting and carrying heavy objects. The outer layer of the steel wire rope is usually specially treated to resist wear and corrosion and extend the service life. According to actual conditions, the lifting rope 60 can also be other ropes.

[0071] In the embodiment of the present application, the lifting weight is calculated according to the detection value of the tension ring sensor 11, the inclination angle of the lifting arm 50 and the lowering height of the lifting rope 60, including:

[0072] Determine the single rope tension of the hoisting rope 60 according to the detection value of the tension ring sensor 11 and the inclination angle of the lifting arm 50;

[0073] The force analysis of the lifting weight measuring device 100 is carried out. According to the moment balance formula, the moment of the tension ring sensor 11 is equal to the moment of the lifting pulley 13 plus the moment of the mounting bracket 12. The moment of the lifting pulley 13 is the resultant force of the lifting pulley 13 multiplied by the moment arm of the lifting pulley 13. The resultant force of the lifting pulley 13 is related to the force of the lifting rope 60 acting on the lifting pulley 13. Therefore, the single rope tension of the lifting rope 60 can be calculated based on the moment balance formula and the resultant force formula of the lifting pulley 13.

[0074] The lifting capacity is determined according to the single rope tension of the lifting rope 60 and the lowering height of the lifting rope 60.

[0075] The lifting capacity can be obtained by subtracting the gravity of the lifting rope 60 from the lifting force of the lifting rope 60. The lifting force of the lifting rope 60 can be obtained according to the single rope tension of the lifting rope 60. The gravity of the lifting rope 60 is equal to the lowering height of the lifting rope 60 multiplied by the unit weight of the lifting rope 60.

[0076] In the embodiment of the present application, determining the single rope tension of the hoisting rope 60 according to the detection value of the tension ring sensor 11 and the inclination angle of the lifting arm 50 includes:

[0077] Substitute the detection value of the tension ring sensor 11 and the inclination angle of the lifting arm 50 into the first calculation formula for calculation to obtain the single rope tension of the lifting rope 60, wherein the first calculation formula is:

[0078]

[0079] Where, F is set as the single rope tension of the lifting rope 60, N is set as the detection value of the tension ring sensor 11, and M is c Assume that the weight of the mounting bracket 12, L c Assuming that the distance between the center of gravity of the mounting bracket 12 and the hinge point of the boom 50, L b is set as the force arm of the tension ring sensor 11, γ is set as the angle between the mounting bracket 12 and the lifting arm 50, θ is set as the inclination angle of the lifting arm 50, L a is set as the moment arm of the resultant force of the lifting pulley 13, and α is set as the angle of the lifting rope 60.

[0080] See also Figure 2 and Figure 3 , Figure 2 The middle boom 50 is at a first inclination angle, which is 0°. Figure 3 The middle boom 50 is at a second inclination angle, which is 60°.

[0081] A force analysis is performed on the lifting capacity measuring device 100 .

[0082] According to the moment balance formula: N×L b=F 合力 ×L a +M c ×L c ×cos(γ+θ)

[0083] Wherein, moment = force acting on the object × lever arm, where the lever arm refers to the vertical distance between the line of action of the force and the rotation axis 132 (or fulcrum). 合力 Set as the resultant force of the lifting pulley 13.

[0084] (N×L b ) is the torque of the tension ring sensor 11, that is, the product of the detection value of the tension ring sensor 11 and the force arm of the tension ring sensor 11. (F 合力 ×L a ) is the moment of the lifting pulley 13, that is, the resultant force F of the lifting pulley 13 合力 The product of the force arm of the resultant force of the lifting pulley 13. (M c ×L c ×cos(γ+θ)) is the moment of the mounting bracket 12, where (L c ×cos(γ+θ)) is the force arm of the mounting bracket 12, that is, the weight M of the mounting bracket 12 c The product of the moment arm of the mounting bracket 12. The tilt angle θ of the boom 50, ie, the angle between the boom 50 and the horizontal plane, is obtained using a tilt sensor or an angle sensor.

[0085] The formula for calculating the resultant force of the lifting pulley 13 is: F 合力 =2×F×cos(α / 2)

[0086] Wherein, F is set to the single rope tension of the hoisting rope 60, and α is set to the angle of the hoisting rope 60. (F×cos(α / 2)) is the force exerted by the single rope tension of the hoisting rope 60 on the hoisting pulley 13, and the resultant force of the hoisting pulley 13 is equal to the force exerted by twice the single rope tension on the hoisting pulley 13.

[0087] Combining the moment balance formula with the formula for calculating the resultant force of the lifting pulley 13, we can obtain:

[0088]

[0089] Thus, the first calculation formula can be obtained:

[0090] According to the first calculation formula, the single rope tension of the lifting rope 60 can be calculated. The single rope tension of the lifting rope 60 is generated when the lifting equipment lifts the heavy object, and is applied by an engine, a winch or other lifting device. In addition, in the process of calculating the single rope tension of the lifting rope 60, the inclination angle of the boom 50 is calculated, so that the calculation result of the single rope tension of the lifting rope 60 is more accurate, thereby improving the reliability of the lifting weight measuring device 100. The inclination angle θ of the boom 50 can be measured by an angle sensor.

[0091] L a , L b , L c The unit of is millimeter (mm), the unit of γ, θ, α is angle (°). The unit of single rope tension F is ton (t), the weight of mounting bracket 12 is M c The unit is ton (t). To facilitate the subsequent calculation of the lifting weight, the unit of the single rope tension F is set to ton, excluding the acceleration due to gravity.

[0092] In the first embodiment of the present application, the lifting rope 60 is used to lift a heavy object, and the lifting rope 60 can directly tie the heavy object to lift the heavy object. The lifting rope 60 can also be provided with a hook at its end, and the heavy object is hooked by the hook to lift the heavy object, and the hook can include a pulley block to achieve multiple-rate lifting.

[0093] Determining the lifting capacity according to the single rope tension of the lifting rope 60 and the lowering height of the lifting rope 60 includes:

[0094] Substitute the single rope tension of the lifting rope 60 and the lowering height of the lifting rope 60 into the second calculation formula to calculate to obtain the lifting weight, wherein the second calculation formula is:

[0095] G=Fg 0 ×H

[0096] In the formula, G is set as the lifting weight, F is set as the single rope tension of the lifting rope 60, g 0 ρ is set as the unit weight of the lifting rope 60, and H is set as the lowering height of the lifting rope 60.

[0097] g 0 Assume that the unit weight of the lifting rope 60 is g 0 is the weight of the lifting rope 60 per unit length. H is set as the lowering height of the lifting rope 60, which can be measured by a height sensor, and can be obtained by measuring the number of turns of the pulley and multiplying the number of turns of the pulley by the circumference of the pulley to obtain the lowering height of the lifting rope 60.

[0098] (g 0×H) is the weight of the lowered lifting rope 60, that is, the product of the unit weight of the lifting rope 60 and the lowering height of the lifting rope 60. The single rope tension of the lifting rope 60 minus the weight of the lifting rope 60 is equal to the lifting weight, so the value of the lifting weight can be calculated. The single rope tension of the lifting rope 60 is the total force borne by the lifting rope 60 in the lifting equipment. After deducting the weight of the lifting rope 60 itself, the actual lifting weight acting on the lifted object can be obtained. In actual operation, the lifting rope 60 is not a light object, and the weight of the lifting rope 60 accounts for a certain proportion of the overall tension. Therefore, it is necessary to subtract the weight of the lifting rope 60 from the single rope tension to ensure that the result we obtain is the effective force truly applied to the heavy object. If the weight of the lifting rope 60 is not taken into account, errors may occur in the judgment of the lifting weight, resulting in safety hazards in actual operation. Therefore, the weight of the lifting rope 60 is deducted from the single rope tension of the lifting rope 60, and the accurate lifting weight value obtained not only provides an important basis for safe operation, but also helps to optimize the design and use efficiency of the lifting equipment. Through scientific calculation and reasonable load management, the operating efficiency can be maximized, the failure rate of the equipment can be reduced, and the safety of the operators can be ensured.

[0099] In the second embodiment of the present application, please refer to Figure 4 The lifting weight measuring device 100 is set to single-rate lifting, and the lifting weight measuring device 100 also includes a first hook 40, which is connected to the lifting rope 60 and is used to lift the heavy object. By setting the first hook 40 to be connected to the heavy object and carry the heavy object, the heavy object is prevented from falling off, making the moving process of the heavy object more stable and reliable, and improving the safety of the heavy object handling process.

[0100] Determining the lifting capacity according to the single rope tension of the lifting rope 60 and the lowering height of the lifting rope 60 includes:

[0101] Substitute the single rope tension of the hoisting rope 60 and the lowering height of the hoisting rope 60 into the third calculation formula to calculate and obtain the lifting weight, wherein the third calculation formula is:

[0102] G=Fg 0 ×Hg 1

[0103] In the formula, G is set as the lifting weight, F is set as the single rope tension of the lifting rope 60, g 0 Set as the unit weight of the lifting rope 60, H as the lowering height of the lifting rope 60, g 1 Let be the weight of the first hook 40 .

[0104] (g 0 ×H) is the weight of the lowered hoisting rope 60, that is, the product of the unit weight of the hoisting rope 60 and the lowering height of the hoisting rope 60, g 1is the weight of the first hook 40. The single rope tension of the lifting rope 60 minus the weight of the lifting rope 60, minus the weight of the first hook 40 is equal to the lifting weight, so the lifting weight value can be calculated. The single rope tension of the lifting rope 60 is the total force borne by the lifting rope 60 in the lifting equipment. After deducting the weight of the lifting rope 60 itself and the weight of the first hook 40, the actual lifting weight acting on the lifted object can be obtained. Although the hook may be smaller in weight compared to the heavy object, its weight should not be underestimated in high-intensity lifting operations. Deducting the weight of the first hook 40 from the tension can improve the accuracy of the obtained lifting weight value.

[0105] In the third embodiment of this application, please refer to Figure 5 , the lifting weight measuring device 100 is set to multi-rate lifting, and the lifting weight measuring device 100 also includes a second hook 20, the second hook 20 includes a hook head 21 and a lifting pulley block 22, the lifting rope 60 is wound on the lifting pulley block 22, the hook head 21 is connected to the lifting pulley block 22 and is used to lift the heavy object. By setting the lifting pulley block 22, the lifting efficiency can be significantly improved and the labor intensity during the operation can be reduced. By using the lifting pulley block 22, the force applied to the heavy object is dispersed, thereby achieving force amplification. For example, in a pulley block connected by two ropes, only half of the force is actually applied to lift the heavy object. This is because the moving wheel and the fixed wheel work together to distribute the weight of the heavy object to multiple ropes. Therefore, the required force is significantly reduced, making the operation process more labor-saving. When the force is dispersed, the overall stability and safety of the lifting equipment are enhanced. The lifting pulley block 22 reduces the risk of rope slippage or rope breakage caused by excessive single force, which helps to prevent accidents.

[0106] Determining the lifting capacity according to the single rope tension of the lifting rope 60 and the lowering height of the lifting rope 60 includes:

[0107] Substitute the single rope tension of the lifting rope 60 and the lowering height of the lifting rope 60 into the fourth calculation formula to calculate and obtain the lifting weight, wherein the fourth calculation formula is:

[0108] G=F×mg 0 ×H×mg 2

[0109] In the formula, G is set as the lifting weight, F is set as the single rope tension of the lifting rope 60, g 0 Set as the unit weight of the lifting rope 60, H as the lowering height of the lifting rope 60, g 2 Let m be the weight of the second hook 20 and let m be the magnification of the lifting pulley block 22 .

[0110] like Figure 5As shown, the second hook 20 includes a hook head 21 and a lifting pulley block 22, the lifting pulley block 22 is connected to the hook head 21, the lifting pulley block 22 and the hook head 21 move together, and the lifting pulley block 22 may include three moving wheels 221 and a mounting plate 222, and the three moving wheels 221 are rotatably mounted on the mounting plate 222. In addition, the lifting weight measuring device 100 also includes a first fixed wheel 31 and a second fixed wheel 32, and the first fixed wheel 31 and the second fixed wheel 32 are used to change the direction of the lifting rope 60. The lifting rope 60 is sequentially wound around the first fixed wheel 31, the two moving wheels 221 in the lifting pulley block 22, the second fixed wheel 32 and another moving wheel 221 in the lifting pulley block 22. Figure 5 The ratio of the lifting pulley block 22 is 4. The ratio of the pulley block refers to the ratio between the force applied and the weight of the weight when the pulley block is used. Ideally, the ratio of the pulley block is equal to the number of effective ropes that can carry the weight. Figure 5 As shown, the lifting pulley block 22 has 4 sections of lifting ropes 60 supporting a hook head 21, and the lifting pulley block 22 has a multiplier of 4, which means that the force applied is one quarter of the weight of the weight.

[0111] (F×m) represents the total lifting force of the hoisting rope 60, that is, the product of the single rope tension of the hoisting rope 60 and the multiplication factor of the hoisting pulley block 22. 0 ×H×m) represents the total weight of the lowered hoisting rope 60, that is, the product of the unit weight of the hoisting rope 60, the lowering height of the hoisting rope 60, and the multiple of the hoisting pulley block 22. Among them, the lowering height H of the hoisting rope 60 is the lowering height of a single section of the hoisting rope 60, (g 0 ×H) represents the weight of the lowered single-section lifting rope 60, (g 0 ×H×m) represents the total weight of the lowered lifting rope 60. g 2 It is the weight of the second hook 20, and the weight of the second hook 20 is the weight of the hook head 21 and the lifting pulley block 22. The weight of the lifting pulley block 22 is deducted from the pulling force, and the accuracy of the lifting weight value obtained can be further improved.

[0112] Substituting the first calculation formula into the fourth calculation formula yields:

[0113]

[0114] Thus, the lifting weight can be calculated according to the detection value of the tension ring sensor 11, the inclination angle of the lifting arm 50 and the lowering height of the lifting rope 60. The lifting weight G is a multivariate function relationship with the detection value N of the tension ring sensor 11, the inclination angle θ of the lifting arm 50 and the lowering height H of the lifting rope 60, that is, a nonlinear relationship between the lifting weight G and the detection value N of the tension ring sensor 11 is constructed.

[0115] It can be understood that the above-mentioned third calculation formula can also be regarded as the case where the multiplier m of the lifting pulley block 22 in the second hook 20 in the fourth calculation formula is 1, that is, the first hook 40 can also include a hook head 21 and a lifting pulley block 22, and the lifting pulley block 22 is not wound with a lifting rope 60, and the lifting rope 60 is directly fixedly connected to the first hook 40.

[0116] In the embodiment of the present application, the lifting pulley 13 includes a wheel body 131, a rotating shaft 132, a rope-stopping rod 133 and two mounting ear plates 134. The wheel body 131 is rotatably connected to the mounting bracket 12 via the rotating shaft 132. The two mounting ear plates 134 are sleeved outside the rotating shaft 132. The wheel body 131 and the rope-stopping rod 133 are both located between the two mounting ear plates 134. A limited position channel is formed between the rope-stopping rod 133 and the wheel body 131, and the lifting rope 60 is located in the limited position channel.

[0117] The wheel body 131 is rotatably connected to the mounting bracket 12 via the rotating shaft 132, so that the wheel body 131 can rotate relative to the mounting bracket 12 around the rotating shaft 132. Two mounting lugs 134 are sleeved outside the rotating shaft 132, and the two mounting lugs 134 are respectively located on opposite sides of the wheel body 131. The wheel body 131 and the rope blocking rod 133 are both located between the two mounting lugs 134, and the rope blocking rod 133 is spaced apart from the wheel body 131, so that a limited position channel is formed between the rope blocking rod 133 and the wheel body 131, and the lifting rope 60 is located in the limited position channel. By setting the limited position channel, the lifting rope 60 is limited in the limited position channel to prevent the lifting rope 60 from falling off, thereby improving the reliability during the lifting process.

[0118] The number of the rope blocking rods 133 can be two or more, so that the safety and reliability of the use of the lifting rope 60 are higher.

[0119] Specifically, the boom 50 includes an upper chord 53, a lower chord 54, a first ear plate 51 and a second ear plate 52. The first ear plate 51 and the second ear plate 52 can be installed on the upper chord 53 or on the lower chord 54. Figure 1 As shown, the first ear plate 51 and the second ear plate 52 are mounted on the upper chord rod 53, the upper end of the tension ring sensor 11 is hinged to the first ear plate 51, and the first end 121 of the mounting bracket 12 is hinged to the second ear plate 52. Figure 6 As shown, the upper end of the tension ring sensor 11 may also be hinged to the second ear plate 52 , and the first end 121 of the mounting bracket 12 is hinged to the first ear plate 51 .

[0120] like Figure 7 As shown, the first ear plate 51 and the second ear plate 52 can also be installed on the lower chord 54 , the upper end of the tension ring sensor 11 is hinged to the first ear plate 51 , and the first end 121 of the mounting bracket 12 is hinged to the second ear plate 52 .

[0121] like Figure 8 As shown, the first ear plate 51 and the second ear plate 52 are mounted on the lower chord 54 , the upper end of the tension ring sensor 11 is hinged to the second ear plate 52 , and the first end 121 of the mounting bracket 12 is hinged to the first ear plate 51 .

[0122] As described above, the lifting capacity measuring device 100 in the present application can have a flexible and changeable structure according to the design form of the lifting equipment pulley system. This flexible and changeable design enables the measuring device to adapt to various working environments and operational requirements, thereby being widely used in multiple fields.

[0123] Secondly, the present application also provides a lifting weight measurement method, which is applied to the lifting weight measurement device 100 as described above and includes:

[0124] The lifting weight is calculated according to the detection value of the tension ring sensor 11, the inclination angle of the lifting arm 50 and the lowering height of the lifting rope 60, and the lifting equipment is controlled to stop when the lifting weight exceeds the standard.

[0125] Taking the tilt angle of the crane arm 50 into consideration can significantly improve the accuracy of the lifting capacity measurement, because the angle of the crane arm 50 directly affects the distribution of the force applied to the lifting rope 60 and the lifting capacity measurement device 100, thereby affecting the working state and lifting capacity of the lifting equipment.

[0126] Set a preset value (for example, the maximum allowable lifting weight) according to the rated load and safety standards of the lifting equipment. Use the controller to continuously detect whether the calculated lifting weight exceeds the preset value. If the monitored lifting weight exceeds the preset value, the corresponding control measures are immediately triggered to automatically stop the lifting equipment to prevent damage to the lifting equipment or safety accidents caused by overloading. At the same time, the alarm system can be triggered to notify the operator to conduct manual inspection and safety assessment. Through the above methods, the safety of the use of lifting equipment can be effectively improved, the risk of overloading can be reduced, and the smooth progress of the operation can be ensured.

[0127] In the embodiments of this application, please refer to Fig. 9 , calculating the lifting weight according to the detection value of the tension ring sensor 11, the inclination angle of the lifting arm 50 and the lowering height of the lifting rope 60, and controlling and stopping the lifting equipment when the lifting weight exceeds the standard includes:

[0128] Step S10, respectively obtaining the initial value of the lowering height of the hoisting rope 60 and the initial value of the inclination angle of the crane arm 50;

[0129] The initial value of the lowering height of the hoisting rope 60 is obtained through the height sensor, and the initial value of the inclination angle of the boom 50 is obtained through the angle sensor. The inclination angle of the boom 50 refers to the angle between the boom 50 and the horizontal plane.

[0130] Step S20, when it is determined that the lifting rope is in an unloaded state, the initial value of the detection value of the tension ring sensor is obtained, and the initial value of the lifting weight is calculated according to the initial value of the lowering height of the lifting rope, the initial value of the inclination angle of the lifting arm and the initial value of the detection value of the tension ring sensor;

[0131] Determine that the hoisting rope is in an unloaded state, which means that the hoisting rope is not carrying any weight. When the hoisting rope is determined to be in an unloaded state, obtain the initial value N of the detection value of the tension ring sensor. 1 , and according to the initial value H of the lowering height of the lifting rope 1 , the initial value of the inclination angle of the crane arm θ 1 And the initial value N of the detection value of the tension ring sensor 1 Calculate the initial value of the lifting weight G 1 Specifically, the calculation method of the lifting capacity and the relevant formula are described in detail above and will not be described in detail here.

[0132] Step S30, when it is determined that the lifting rope is in a loaded state, the real-time value of the detection value of the tension ring sensor is obtained in real time, and the real-time value of the lifting weight is calculated according to the real-time value of the lowering height of the lifting rope, the real-time value of the inclination angle of the lifting arm and the real-time value of the detection value of the tension ring sensor;

[0133] Connect the weight to the lifting rope so that the lifting rope is in a loaded state and obtain the real-time value N of the detection value of the tension ring sensor in real time 2 And, according to the real-time value H of the lowering height of the lifting rope 2 、Real-time value of the inclination angle of the crane arm θ 2 And the real-time value N of the detection value of the tension ring sensor 2 Calculate the real-time value of the lifting weight G 2 .

[0134] Step S40, calculating the actual lifting weight according to the initial lifting weight value and the real-time lifting weight value;

[0135] Initial value of lifting weight G 1 And the real-time value of lifting weight G 2 The difference between them is the actual lifting capacity G.

[0136] That is, G = G 2 -G 1 .

[0137] Step S50: If the actual lifting weight is greater than the preset value, the lifting equipment is controlled to stop.

[0138] If the actual lifting weight monitored is greater than the preset value, the corresponding control measures will be triggered immediately to automatically stop the lifting equipment to prevent damage to the lifting equipment or safety accidents caused by overloading, thereby improving the safety of the lifting equipment, effectively reducing the risk of overloading, and ensuring the smooth progress of the operation.

[0139] The lifting capacity measurement device 100 and the lifting capacity measurement method in the present application can produce the following effects:

[0140] 1. The single rope tension of the hoisting rope 60 is transformed by the lever structure and acts on the tension of the tension ring sensor 11. By changing the structure, the lever value changes to ensure that the force of the lifting weight measuring device 100 is within the range. The lifting weight measuring device 100 is highly versatile and can meet the operating requirements of tower cranes with different lifting weights, and the product procurement cycle is short.

[0141] 2. By constructing a lifting weight calculation model, the initial data of the tension ring sensor 11, the inclination sensor, and the height sensor are collaboratively called to determine the initial value of the lifting weight, and the lifting weight of the lifting equipment is quickly calibrated. The weight accuracy after calibration is high.

[0142] 3. The entire set of lifting weight measurement methods can be completed quickly by the lifting equipment driver alone, without the need to prepare additional weights. The measurement can be completed quickly and in a short time.

[0143] 4. The whole set of lifting capacity measurement method can be applied to boom tower crane, flat-top boom tower crane, and can also meet the needs of flat-arm tower crane. The method has a wide range of applications.

[0144] In addition, the present application also provides a lifting device, which includes the lifting weight measuring device 100 described above. Since the lifting device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0145] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0146] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0147] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0148] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A lifting capacity measuring device, characterized in that: The lifting capacity measuring device comprises: A measuring assembly, comprising a tension ring sensor (11), a mounting bracket (12) and a lifting pulley (13), wherein the upper end of the tension ring sensor (11) and the first end (121) of the mounting bracket (12) are hinged to the lifting arm (50) at intervals in sequence along the length direction of the lifting arm (50), and the lower end of the tension ring sensor (11) is hinged to the second end (122) of the mounting bracket (12), and the lifting pulley (13) is arranged on the mounting bracket (12) and can be used for winding a lifting rope (60); A controller is communicatively connected to the tension ring sensor (11) and is configured to: The lifting capacity is calculated according to the detection value of the tension ring sensor (11), the inclination angle of the lifting arm (50) and the lowering height of the lifting rope (60).

2. The lifting capacity measuring device according to claim 1, characterized in that: The method of calculating the lifting capacity according to the detection value of the tension ring sensor (11), the inclination angle of the lifting arm (50) and the lowering height of the lifting rope (60) comprises: Determining the single rope tension of the hoisting rope (60) according to the detection value of the tension ring sensor (11) and the inclination angle of the lifting arm (50); The lifting capacity is determined according to the single rope tension of the lifting rope (60) and the lowering height of the lifting rope (60).

3. The lifting capacity measuring device according to claim 2, characterized in that: The method of determining the single rope tension of the lifting rope (60) according to the detection value of the tension ring sensor (11) and the inclination angle of the lifting arm (50) comprises: The detection value of the tension ring sensor (11) and the inclination angle of the lifting arm (50) are substituted into a first calculation formula for calculation to obtain the single rope tension of the lifting rope (60), wherein the first calculation formula is: Wherein, F is set as the single rope tension of the hoisting rope (60), N is set as the detection value of the tension ring sensor (11), and M is c Let L be the weight of the mounting bracket (12). c Set as the distance between the center of gravity of the mounting bracket (12) and the hinge point of the boom (50), L b is set as the force arm of the tension ring sensor (11), γ is set as the angle between the mounting bracket (12) and the lifting arm (50), θ is set as the inclination angle of the lifting arm (50), L a is set as the moment arm of the resultant force of the lifting pulley (13), and α is set as the angle of the lifting rope (60).

4. The lifting capacity measuring device according to claim 2, characterized in that: The lifting rope (60) is used to lift heavy objects, and the method of determining the lifting weight according to the single rope tension of the lifting rope (60) and the lowering height of the lifting rope (60) includes: Substitute the single rope tension of the hoisting rope (60) and the lowering height of the hoisting rope (60) into the second calculation formula to calculate the lifting capacity, wherein the second calculation formula is: G=F-g0×H Wherein, G is set as the lifting weight, F is set as the single rope tension of the lifting rope (60), g0 is set as the unit weight of the lifting rope (60), and H is set as the lowering height of the lifting rope (60).

5. The lifting capacity measuring device according to claim 2, characterized in that: The lifting capacity measuring device (100) is configured for single-rate lifting, and the lifting capacity measuring device (100) further comprises a first hook (40), wherein the first hook (40) is connected to the lifting rope (60) and is used for lifting a heavy object; Determining the lifting capacity according to the single rope tension of the lifting rope (60) and the lowering height of the lifting rope (60) comprises: Substitute the single rope tension of the hoisting rope (60) and the lowering height of the hoisting rope (60) into the third calculation formula to calculate and obtain the lifting weight, wherein the third calculation formula is: G=F-g0×H-g1 In the formula, G is set as the lifting weight, F is set as the single rope tension of the lifting rope (60), g0 is set as the unit weight of the lifting rope (60), H is set as the lowering height of the lifting rope (60), and g1 is set as the weight of the first hook (40).

6. The lifting capacity measuring device according to claim 2, characterized in that: The lifting capacity measuring device (100) is configured for multiple-rate lifting, and the lifting capacity measuring device (100) further comprises a second hook (20), the second hook (20) comprising a hook head (21) and a lifting pulley block (22), the lifting rope (60) being wound around the lifting pulley block (22), the hook head (21) being connected to the lifting pulley block (22) and being used for lifting a heavy object; Determining the lifting capacity according to the single rope tension of the lifting rope (60) and the lowering height of the lifting rope (60) comprises: Substitute the single rope tension of the hoisting rope (60) and the lowering height of the hoisting rope (60) into the fourth calculation formula to calculate and obtain the lifting weight, wherein the fourth calculation formula is: G=F×m-g0×H×m-g2 In the formula, G is set as the lifting weight, F is set as the single rope tension of the lifting rope (60), g0 is set as the unit weight of the lifting rope (60), H is set as the lowering height of the lifting rope (60), g2 is set as the weight of the second hook (20), and m is set as the multiplier of the lifting pulley block (22).

7. The lifting capacity measuring device according to any one of claims 1 to 6, characterized in that: The lifting pulley (13) comprises a wheel body (131), a rotating shaft (132), a rope-blocking rod (133) and two mounting ear plates (134); the wheel body (131) is rotatably connected to the mounting bracket (12) via the rotating shaft (132); the two mounting ear plates (134) are sleeved outside the rotating shaft (132); the wheel body (131) and the rope-blocking rod (133) are both located between the two mounting ear plates (134); a limited position channel is formed between the rope-blocking rod (133) and the wheel body (131); and the lifting rope (60) is located in the limited position channel.

8. A method for measuring lifting capacity, characterized in that: The lifting capacity measurement method is applied to the lifting capacity measurement device according to any one of claims 1 to 7, and comprises: The lifting weight is calculated according to the detection value of the tension ring sensor (11), the inclination angle of the lifting arm (50) and the lowering height of the lifting rope (60), and the lifting device is controlled to stop when the lifting weight exceeds the standard.

9. The lifting capacity measurement method according to claim 8, characterized in that: The method of calculating the lifting weight according to the detection value of the tension ring sensor (11), the inclination angle of the lifting arm (50) and the lowering height of the lifting rope (60), and controlling and stopping the lifting device when the lifting weight exceeds the standard comprises: respectively obtaining an initial value of the lowering height of the hoisting rope (60) and an initial value of the inclination angle of the crane arm (50); When it is determined that the lifting rope (60) is in an unloaded state, an initial value of the detection value of the tension ring sensor (11) is obtained, and an initial value of the lifting weight is calculated based on an initial value of the lowering height of the lifting rope (60), an initial value of the inclination angle of the lifting arm (50), and an initial value of the detection value of the tension ring sensor (11); When it is determined that the lifting rope (60) is in a loaded state, the real-time value of the detection value of the tension ring sensor (11) is obtained in real time, and the real-time value of the lifting weight is calculated based on the real-time value of the lowering height of the lifting rope (60), the real-time value of the inclination angle of the lifting arm (50) and the real-time value of the detection value of the tension ring sensor (11); The actual lifting weight is calculated based on the initial lifting weight value and the real-time lifting weight value; If the actual lifting weight is greater than the preset value, the lifting equipment will be stopped.

10. A lifting device, characterized in that: The lifting equipment includes the lifting capacity measuring device described in any one of claims 1 to 7.

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