Eccentric hoisting method, eccentric hoisting device and eccentric hoisting system

Abstract

The present application provides an eccentric hoisting method, an eccentric hoisting device and an eccentric hoisting system. The eccentric hoisting method comprises the following steps: a determination step: determining that the number of lifting lugs is three; a setting and measuring step: setting the first hook and the second hook on one side of the steel structure member, and the third hook on the other side of the steel structure member; measuring the distance from the first hook to the center line of the crane as l4, measuring the distance from the second hook to the center line of the crane as l3, and l4 = l3; measuring the distance from the center of gravity line of the steel structure member to the first hook in the first direction as L4, and measuring the distance from the center of gravity line of the steel structure member to the second hook in the first direction as L3; a judgment step: if L4 > l4 or L3 > l3; a calculation step: calculating the force on the first hook, the force on the second hook and the force on the third hook. The present application can achieve the smooth hoisting of the steel structure member when there is a certain deviation between the center line of the crane and the center of gravity line of the steel structure member.

Description

Technical Field

[0001] The present application relates to the field of transportation, and in particular, to an eccentric lifting method, an eccentric lifting device, and an eccentric lifting system. Background Art

[0002] When using three hooks on a single gantry crane for steel structure lifting, in order to ensure the stable and safe lifting of the workpiece to be lifted (steel structure), combined with Figure 1 As shown, the basic requirements of the conventional lifting method are as follows: (1) Hook No. 1 and Hook No. 2 are located on one side of the steel structure, and Hook No. 3 is located on the other side of the steel structure; (2) The deviation between the midpoint of the line connecting Hook No. 1 and Hook No. 2 and the line connecting to Hook No. 3, that is, the crane center line, and the center line of the steel structure gravity is small, that is, L1≈L2; (3) The load-bearing capacity of Hook No. 1, Hook No. 2, and Hook No. 3 does not exceed the rated parameters of the crane; when arranging the corresponding lifting lugs for the hooks, according to the basic requirements of the conventional lifting method, the corresponding lifting lug of Hook No. 3 is usually directly arranged on the crane center line or the center line of the steel structure gravity, and then the positions of the corresponding lifting lugs of Hook No. 1 and Hook No. 2 are arranged.

[0003] However, in the actual lifting process, the following three situations often occur: (1) When the lifting lugs of each hook are preferentially arranged at the strong structure position of the steel structure, the deviation between the midpoint of the line connecting Hook No. 1 and Hook No. 2 and the line connecting to Hook No. 3 and the gravity center of the steel structure is large; (2) When the top view projection of the steel structure presents a triangular or extremely special shape, the corresponding lifting lug of Hook No. 3 cannot be directly arranged on the crane center line or the center line of the steel structure gravity, and the deviation is large; (3) When the crane needs to lift and travel to the limit position of the track, according to the lifting destination position of the steel structure and the limit position of the crane traveling on its track, the deviation between the gravity center of the steel structure lifting destination position and the center line of the crane limit position is large.

[0004] When the above three situations occur, the deviation between the crane center line and the gravity center line is large, and the existing conventional lifting method cannot be used for smooth lifting. Therefore, there is an urgent need for an eccentric lifting method, an eccentric lifting device, and an eccentric lifting system to solve the technical problems existing in the prior art to a certain extent. Summary of the Invention

[0005] The purpose of the present application is to provide an eccentric lifting method, an eccentric lifting device, and an eccentric lifting system to solve the lifting technical problems to a certain extent when the distance deviation between the center line of the crane and the center line of gravity of the steel structure is large.

[0006] The present application provides an eccentric lifting method, including the following steps:

[0007] Determination step: Determine that the number of lifting lugs is three, namely the first hook, the second hook, and the third hook;

[0008] Setting and measuring steps: Set the first hook and the second hook on one side of the steel structure member, and set the third hook on the other side of the steel structure member; Measure the distance from the first hook to the center line of the crane as l4, measure the distance from the second hook to the center line of the crane as l3, and l4 = l3; Measure the distance from the center of gravity line of the steel structure member to the first hook in the first direction as L4, and measure the distance from the center of gravity line of the steel structure member to the second hook in the first direction as L3;

[0009] Judgment step: If L4 > l4 or L3 > l3;

[0010] Calculation step: Under the condition that the force difference between the force on the first hook and the force on the second hook is less than or equal to the rated parameters of the crane, calculate the force on the first hook, the force on the second hook, and the force on the third hook.

[0011] In the above technical solution, further, the calculation step includes the following steps:

[0012] Parameter definition step: Set the force on the first hook as P1, set the force on the second hook as P2, set the force on the third hook as P3, and set the weight of the steel structure member as G;

[0013] Parameter measurement step: Measure the distance from the third hook to the center of gravity line of the steel structure member in the second direction as L1, and measure the distance from the first hook to the center of gravity line of the steel structure member in the second direction as L2;

[0014] Force calculation step: According to formula (1), formula (2), and formula (3), calculate the force on the first hook, the force on the second hook, and the force on the third hook respectively;

[0015] P1 = G × L1 / (L1 + L2) × L4 / (L3 + L4) (1)

[0016] P2 = G × L1 / (L1 + L2) × L3 / (L3 + L4) (2)

[0017] P3 = G × L2 / (L1 + L2) (3).

[0018] In the above technical solution, further, a counterweight step is further included after the calculation step;

[0019] In the above judgment step, if L4 >> l4 or L3 >> l3; and the forces on the first hook, the second hook, and the third hook calculated by the above formula (1), formula (2), and formula (3) do not meet the defined conditions, then execute the counterweight step;

[0020] The counterweight step is: placing a counterweight with a preset weight on the steel structure member so that the center line of the steel structure member approaches the center line of the crane.

[0021] In the above technical solution, further, the counterweight step specifically includes the following steps:

[0022] Placing step: placing the counterweight on one side of the steel structure member close to the third hook;

[0023] Parameter measurement step of the counterweight: measuring the weight of the counterweight as g, measuring the center of gravity of the steel structure member as X, and measuring the center of gravity of the counterweight as x;

[0024] Calculation step of the center of gravity X' of the steel-counterweight integral member: calculate according to formula (4):

[0025] X' = (G×X + g×x) / (G + g) (4)

[0026] Wherein, X' represents the center of gravity of the steel-counterweight integral member composed of the counterweight and the steel structure member.

[0027] In the above technical solution, further, the total weight of the steel structure member and the counterweight is less than or equal to the maximum lifting capacity of the crane.

[0028] In the above technical solution, further, the force on the third hook is less than or equal to the rated parameter of the crane.

[0029] In the above technical solution, further, after the counterweight step, there is also an adjustment step: adjusting the forces on the first hook, the second hook, and the third hook according to the calculation step and the counterweight step.

[0030] This application also provides an eccentric hoisting device, adopting the above eccentric hoisting method, and the eccentric hoisting device includes a support assembly, a drive assembly, and a hook assembly;

[0031] The support assembly has a first installation position and a second installation position;

[0032] The drive assembly is arranged at the first installation position;

[0033] The hook assembly is arranged at the second installation position;

[0034] The driving component is communicatively connected to the hook component.

[0035] In the above technical solution, further, the eccentric hoisting device further includes a control module;

[0036] The driving component is communicatively connected to the control module, and the control module is capable of transmitting a driving signal to the driving component to move the hook component to a preset position.

[0037] This application also provides an eccentric hoisting system, including the above eccentric hoisting device.

[0038] Compared with the prior art, the beneficial effects of this application are:

[0039] This application provides an eccentric hoisting method, including the following steps:

[0040] Determination step: Determine that the number of lifting lugs is three, namely the first hook, the second hook, and the third hook;

[0041] Setting and measuring step: Set the first hook and the second hook on one side of the steel structure member, and the third hook on the other side of the steel structure member; Measure the distance from the first hook to the center line of the crane as l4, measure the distance from the second hook to the center line of the crane as l3, and l4 = l3; Measure the distance from the center of gravity line of the steel structure member to the first hook in the first direction as L4, and measure the distance from the center of gravity line of the steel structure member to the second hook in the first direction as L3;

[0042] Judgment step: If L4 > l4 or L3 > l3;

[0043] Calculation step: Under the condition that the force difference between the first hook and the second hook is less than or equal to the limit of the rated parameters of the crane, calculate the forces on the first hook, the second hook, and the third hook.

[0044] Specifically, the eccentric hoisting method can successfully solve the problems that cannot meet the conventional hoisting method due to special structural forms and that cannot be hoisted in place due to the crane traveling position being at the limit position in addition to the conventional hoisting method. Further, the eccentric hoisting method provided by this application, that is, there is a certain deviation between the center line of the crane and the center of gravity line of the steel structure member, realizes the smooth hoisting of the steel structure member on the premise of meeting the requirements of various rated parameters of the crane.

[0045] The present application also provides an eccentric hoisting device, which includes a support assembly, a drive assembly, and a hook assembly; the support assembly has a first mounting position and a second mounting position; the drive assembly is disposed at the first mounting position; the hook assembly is disposed at the second mounting position; the drive assembly is communicatively connected to the hook assembly. Based on the eccentric hoisting device adopting this eccentric hoisting method, it thus has all the beneficial effects of the eccentric hoisting method, and no further elaboration will be made here.

[0046] The present application also provides an eccentric hoisting system, which includes the above-mentioned eccentric hoisting device, and thus has all the beneficial effects of the eccentric hoisting device, and no further elaboration will be made here. Description of the Drawings

[0047] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0048] Figure 1 It is a schematic structural diagram of a conventional hoisting method in the prior art provided by the present application;

[0049] Figure 2 It is a first schematic structural diagram of the eccentric hoisting direction provided in the first embodiment of the present application;

[0050] Figure 3 It is a second schematic structural diagram of the eccentric hoisting direction provided in the first embodiment of the present application.

[0051] Reference numerals: 1 - first hook; 2 - second hook; 3 - third hook; 4 - center line of the crane; 5 - steel structure member; 6 - center of gravity line of the steel structure member; 7 - first direction; 8 - second direction; 9 - counterweight; 10 - hook No. 1; 11 - hook No. 2; 12 - hook No. 3; 13 - crane center line; 14 - steel structure member; 15 - center of gravity line of the steel structure member; 16 - steel and counterweight integral member; 17 - center of gravity line of the steel and counterweight integral member. Detailed Embodiments

[0052] The following specific embodiments are provided to assist the reader in obtaining a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely exemplary and is not limited to the order set forth herein, but rather changes that will be apparent after understanding the disclosure of this application may be made, except for operations that must occur in a specific order. In addition, descriptions of features known in the art may be omitted for increased clarity and conciseness.

[0053] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many possible ways of implementing the methods, devices, and / or systems described herein that will be apparent after understanding the disclosure of this application.

[0054] Throughout the specification, when an element (such as, a layer, region, or substrate) is described as "on" another element, "connected to" another element, "coupled to" another element, "above" another element, or "covering" another element, it may be directly "on", "connected to", "coupled to", "above", or "covering" the other element, or there may be one or more other elements intervening therebetween. In contrast, when an element is described as "directly on", "directly connected to", "directly coupled to", "directly above", or "directly covering" another element, there may be no other elements intervening therebetween.

[0055] As used herein, the term "and / or" includes any one of the listed related items and any combination of any two or more of them.

[0056] Although terms such as "first", "second", and "third" may be used herein to describe various components, components, regions, layers, or parts, these components, components, regions, layers, or parts are not limited by these terms. Rather, these terms are only used to distinguish one component, component, region, layer, or part from another. Thus, the first component, component, region, layer, or part referred to in the examples described herein may also be referred to as the second component, component, region, layer, or part without departing from the teachings of the examples.

[0057] For ease of description, spatial relationship terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another as shown in the drawings. Such spatial relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawing is flipped, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientation of "above" and "below" depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relationship terms used herein will be interpreted accordingly.

[0058] The terms used herein are for the purpose of describing various examples only and are not intended to limit the disclosure. Unless the context clearly dictates otherwise, the singular forms are also intended to include the plural forms. The terms "comprises", "comprising", and "having" list the stated features, quantities, operations, components, elements, and / or combinations thereof that exist, but do not preclude the existence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Thus, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing.

[0059] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have a variety of configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0060] Example 1

[0061] Combined with Figure 2 as described above, a method for eccentric hoisting provided by the present application is described. The eccentric hoisting method includes the following steps:

[0062] Determination step 100: Determine that the number of lifting lugs is three, namely the first hook 1, the second hook 2, and the third hook 3;

[0063] Setting and measuring step 200: Set the first hook 1 and the second hook 2 on one side of the steel structure member 5, and set the third hook 3 on the other side of the steel structure member 5; Measure the distance from the first hook 1 to the center line 4 of the crane as l4, measure the distance from the second hook 2 to the center line 4 of the crane as l3, and l4 = l3; Measure the distance from the center of gravity line 6 of the steel structure member to the first hook 1 in the first direction 7 as L4, and measure the distance from the center of gravity line 6 of the steel structure member to the second hook 2 in the first direction 7 as L3;

[0064] Judgment step 300: If L4 > l4 or L3 > l3;

[0065] Calculation step 400: Under the condition that the force difference between the force on the first hook 1 and the force on the second hook 2 is less than or equal to the rated parameters of the crane, calculate the force on the first hook 1, the force on the second hook 2, and the force on the third hook 3.

[0066] For the above-mentioned limiting conditions, for example, for a crane with a load capacity of 600 tons, the limiting condition is that the force difference (load difference) between the force on the first hook 1 and the force on the second hook 2 is less than or equal to 100 tons. For a crane with a load capacity of 400 tons, the limiting condition is that the force difference (load difference) between the force on the first hook 1 and the force on the second hook 2 is less than or equal to 80 tons.

[0067] In summary, the above eccentric lifting method can successfully solve the problem that the conventional lifting method cannot be satisfied due to the special structural form, and the problem that the conventional lifting method cannot be lifted in place due to the crane traveling position being at the limit position in addition to the conventional lifting method. Further, the eccentric lifting method provided by the present application, that is, there is a certain deviation between the center line 4 of the crane and the center of gravity line 6 of the steel structure member, realizes the smooth lifting of the steel structure member 5 on the premise of meeting the requirements of various rated parameters of the crane.

[0068] In this embodiment, the calculation step 400 includes the following steps:

[0069] Parameter definition step 401: Set the force on the first hook 1 as P1, set the force on the second hook 2 as P2, set the force on the third hook 3 as P3, and set the weight of the steel structure member 5 as G;

[0070] Parameter measurement step 402: Measure the distance from the third hook 3 to the center of gravity line 6 of the steel structure member in the second direction 8 as L1, and measure the distance from the first hook 1 to the center of gravity line 6 of the steel structure member in the second direction 8 as L2;

[0071] Calculation of the force on the hooks step 403: Calculate the forces on the first hook 1, the second hook 2, and the third hook 3 respectively according to formula (1), formula (2), and formula (3).

[0072] P1 = G × L1 / (L1 + L2) × L4 / (L3 + L4) (1)

[0073] P2 = G × L1 / (L1 + L2) × L3 / (L3 + L4) (2)

[0074] P3 = G × L2 / (L1 + L2) (3).

[0075] In summary, based on the measured L1, L2, G, L3, and L4, re - determine the forces on the first hook 1, the second hook 2, and the third hook 3, so as to lift the steel structure member 5.

[0076] Combined Figure 3 As shown, in this embodiment, after the calculation step, there is also a counterweight step 500;

[0077] In the judgment step 300, if L4 >> l4 (L4 is much larger than l4) or L3 >> l3 (L3 is much larger than l3); the forces on the first hook 1, the second hook 2, and the third hook 3 calculated by formula (1), formula (2), and formula (3) do not meet the limit conditions (in other words, just adjusting the forces on the first hook 1, the second hook 2, and the third hook 3 is still not enough to lift the steel structure member 5, or the forces on the first hook 1, the second hook 2, and the third hook 3 have reached the maximum rated value), then execute the counterweight step 500;

[0078] The counterweight step 500 is: Place a counterweight member 9 with a preset weight on the steel structure member 5, so that the center - of - gravity line 6 of the steel structure member is close to the center line 4 of the crane.

[0079] Specifically, the counterweight step 500 specifically includes the following steps:

[0080] Placement step 501: Place the counterweight member 9 on one side of the steel structure member 5 close to the third hook 3;

[0081] Parameter measurement step 502 of the counterweight member 9: Measure the weight of the counterweight member 9 as g, measure the center of gravity of the steel structure member 5 as X, and measure the center of gravity of the counterweight member 9 as x;

[0082] Calculation step of the center of gravity X' of the steel - counterweight assembly 16: Calculate according to formula (4):

[0083] X' = (G × X + g × x) / (G + g) (4)

[0084] Among them, X' represents the center of gravity of the steel - weight integral part 16 composed of the counterweight 9 and the steel structure part 5.

[0085] Through the above calculations, the center - of - gravity line 17 of the steel - weight integral part can be obtained. Then, by re - measuring, the distance from the first hook 1 to the center - of - gravity line 17 of the steel - weight integral part in the first direction 7 is L6, the distance from the second hook 2 to the center - of - gravity line 17 of the steel - weight integral part in the first direction 7 is L5, the distance from the third hook 3 to the center - of - gravity line 17 of the steel - weight integral part in the second direction 8 is L7, and the distance from the first hook 1 to the center - of - gravity line 17 of the steel - weight integral part in the second direction 8 is L8. The force P on the first hook 1 is calculated respectively through the following formulas (5) - (7). 11 the force P on the second hook 2 22 and the force P on the third hook 3 33 ;

[0086] P 11 = G×L7 / (L7 + L8)×L6 / (L6 + L5) (5)

[0087] P 22 = G×L7 / (L7 + L8)×L5 / (L5 + L6) (6)

[0088] P 33 = G×L8 / (L7 + L8) (7).

[0089] In this embodiment, after the counterweight step 500, there is also an adjustment step 600: According to the calculation step and the counterweight step, adjusting the forces on the first hook 1, the second hook 2, and the third hook 3 can achieve the hoisting of the steel structure part 5 with an irregular structure.

[0090] In this embodiment, the total weight of the steel structure part 5 and the counterweight 9 is less than or equal to the maximum lifting capacity of the crane, such as 600 tons, 800 tons, etc.

[0091] In this embodiment, the force on the third hook 3 is less than or equal to the rated parameters of the crane.

[0092] Embodiment Two

[0093] In this embodiment, an eccentric hoisting device is provided, which adopts the above - mentioned eccentric hoisting method. The eccentric hoisting device includes a support assembly, a drive assembly, and a hook assembly.

[0094] Specifically, the support assembly has a first installation position and a second installation position; the drive assembly is arranged at the first installation position; the hook assembly is arranged at the second installation position; the drive assembly is communicatively connected to the hook assembly.

[0095] Further, the support assembly includes a support cross beam and support legs disposed below the support cross beam and for supporting the support cross beam. A first mounting position and a second mounting position are formed on the support cross beam.

[0096] In this embodiment, the eccentric hoisting device further includes a control module; the drive assembly is communicatively connected to the control module, and the control module is capable of transmitting a drive signal to the drive assembly. The drive assembly drives the hook assembly to move to a preset position according to the received signal, so that in actual use, a steel structure member can be hoisted and connected at the preset position.

[0097] Preferably, the drive assembly is a servo motor.

[0098] Embodiment III

[0099] The present application further provides an eccentric hoisting system including the above-mentioned eccentric hoisting device. Therefore, it has all the beneficial effects of the eccentric hoisting device and will not be elaborated herein too much.

[0100] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An eccentric hoisting method, characterized in that, It includes the following steps: Determination step: Determine that the number of lifting horses is three, namely the first hook, the second hook and the third hook; Setting and measuring steps: Set the first hook and the second hook on one side of the steel structure member, and the third hook on the other side of the steel structure member; measure the distance from the first hook to the center line of the crane as , measure the distance from the second hook to the center line of the crane as , and ; measure the distance from the center of gravity line of the steel structure member to the first hook in the first direction as , measure the distance from the center of gravity line of the steel structure member to the second hook in the first direction as ; Judgment step: If > or > ; Calculation step: Under the condition that the force difference between the force on the first hook and the force on the second hook is less than or equal to the limit of the rated parameters of the crane, calculate the force on the first hook, the force on the second hook and the force on the third hook; The calculation step includes the following steps: Parameter definition step: Set the force on the first hook to be , set the force on the second hook to be , set the force on the third hook to be , set the weight of the steel structure to be ; Parameter measurement step: Measure the distance from the third hook to the center of gravity line of the steel structure member in the second direction as , measure the distance from the first hook to the center of gravity line of the steel structure member in the second direction as ; Force calculation step: According to formula (1), formula (2) and formula (3), calculate the force on the first hook, the force on the second hook and the force on the third hook respectively; （1） （2） （3）； After the described calculation steps, a counterweight step is further included; in the described judgment step, if >> or >> ; the forces on the first hook, the second hook, and the third hook calculated through the formula (1), the formula (2), and the formula (3) do not meet the described limiting conditions, and the counterweight step is executed; The counterweight step is: Place a counterweight with a preset weight on the steel structure member so that the center line of the steel structure member is close to the center line of the crane; The counterweight step specifically includes the following steps: Placement step: Place the counterweight on one side of the steel structure member close to the third hook; Parameter measurement steps of the counterweight: Measure the weight of the counterweight as g, and measure the center of gravity of the steel structure as , and measure the center of gravity of the counterweight as ; Center of Gravity of Steel-Assembled Components Calculation Steps: Calculate according to formula (4): （4） Among them, represents the center of gravity of the steel-weight integral component composed of the counterweight and the steel structure component.

2. The eccentric hoisting method according to claim 1, characterized in that, The total weight of the steel structure member and the counterweight is less than or equal to the maximum lifting capacity of the crane.

3. The eccentric hoisting method according to claim 2, wherein The force on the third hook is less than or equal to the rated parameters of the crane.

4. The eccentric hoisting method according to claim 3, wherein After the counterweight step, there is also an adjustment step: According to the calculation step and the counterweight step, adjust the force on the first hook, the force on the second hook and the force on the third hook.

5. An eccentric hoisting device, which adopts the eccentric hoisting method described in any one of claims 1-4, and is characterized in that, The eccentric hoisting device includes a support assembly, a drive assembly and a hook assembly; The support assembly has a first installation position and a second installation position; The drive assembly is arranged at the first installation position; The hook assembly is arranged at the second installation position; The drive assembly is communicatively connected to the hook assembly.

6. The eccentric hoisting device according to claim 5, characterized in that, The eccentric hoisting device further includes a control module; The drive assembly is communicatively connected to the control module, and the control module can transmit a drive signal to the drive assembly to make the hook assembly move to a preset position.

7. An eccentric hoisting system, characterized in that, It includes the eccentric hoisting device described in claim 5 or 6.

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