Lifting beam assembly and lifting system

Abstract

The utility model provides a lifting beam assembly and a lifting system. The lifting beam assembly comprises a main beam, a lifting appliance and two auxiliary beams. A plurality of first mounting holes and a plurality of second mounting holes are respectively formed in two end parts of the main beam along the length direction of the main beam. And the distance between any first mounting hole and the second mounting hole corresponds to the first hoisting distance of various liquid tanks. Included angles are formed between the two auxiliary beams and the main beam. One secondary beam is detachably mounted on the first mounting hole, and the other secondary beam is detachably mounted on the second mounting hole. Each auxiliary beam comprises a main body, a first connecting part and a second connecting part. A plurality of first connecting parts and a plurality of second connecting parts are respectively arranged on two end parts of the main body; and the distance between any first connecting part and the second connecting part corresponds to a second hoisting distance between various liquid tanks. The lifting appliance is used for being connected with the liquid tank, so that the two ends of the liquid tank can be correspondingly connected to the auxiliary beams through the lifting appliance. The lifting beam assembly has universality, and lifting of liquid tanks of different models can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hoisting technology field, especially in a kind of hoist beam assembly and hoisting system. BACKGROUND

[0002] To meet environmental protection needs and satisfy the endurance ability of ship, dual-fuel ship emerges as the times require.Dual-fuel ship is a kind of ship that can use two different fuels, one of which is usually traditional petroleum fuel, and the other is clean energy fuel, such as liquefied natural gas, methanol or liquid ammonia, etc.

[0003] Clean energy fuel is generally stored in liquid tank. Due to different ship types, the size and weight of liquid tank are different. Currently, different models of liquid tank need to be designed with a lifting beam, resulting in high cost. INVENTION CONTENTS

[0004] One purpose of the utility model is to provide a lifting beam assembly suitable for hoisting various types of liquid tanks.

[0005] Another purpose of the utility model is to provide a hoisting system with the above lifting beam assembly.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A lifting beam assembly for hoisting liquid tanks, comprising:

[0008] A main beam, along the length direction of the main beam, a plurality of first mounting holes are provided on one end of the main beam, a plurality of second mounting holes are provided on the other end of the main beam, and the distance between any first mounting hole and second mounting hole corresponds to the first hoisting distance of a plurality of liquid tanks;

[0009] Two auxiliary beams, the two auxiliary beams are arranged at an angle with the main beam; one auxiliary beam is detachably mounted on the first mounting hole of the main beam, and the other auxiliary beam is detachably mounted on the second mounting hole of the main beam; each auxiliary beam comprises a main body, a first connecting portion and a second connecting portion, along the length direction of the main body, a plurality of first connecting portions are provided on one end of the main body, and a plurality of second connecting portions are provided on the other end of the main body, and the distance between any first connecting portion and second connecting portion corresponds to the second hoisting distance between a plurality of liquid tanks;

[0010] A lifting device detachably connected to the auxiliary beam, the lifting device is used to connect the liquid tank.

[0011] In some example embodiments, the first mounting hole and the second mounting hole are symmetrically arranged about a center line of the main beam; and the first connecting portion and the second connecting portion are symmetrically arranged about a center line of the sub-beam.

[0012] In some example embodiments, each of the sub-beams comprises two lifting lugs symmetrically arranged on the top of the main body.

[0013] In some example embodiments, each of the sub-beams comprises two extension portions symmetrically arranged on two ends of the main body; each of the extension portions comprises two third connecting columns respectively arranged on two sides of the main body, and one lifting device is capable of being connected to one third connecting column.

[0014] In some example embodiments, the two sub-beams are parallel to each other; and each of the sub-beams is arranged perpendicularly to the main beam.

[0015] In some example embodiments, a plurality of lifting devices are provided, each of the lifting devices extends vertically; and the lifting devices are perpendicular to the liquid tank.

[0016] In some example embodiments, the lifting beam assembly comprises a mounting member, each of the sub-beams comprises a mounting portion arranged on the top of the main body and located at the center of the main body, and the mounting portion is mounted on the mounting hole by the mounting member to mount the sub-beam on the main beam.

[0017] In some example embodiments, the main beam comprises a main body and two lifting columns, two recesses are symmetrically arranged on the top of the main body along the length direction of the main body, and one lifting column is arranged in one recess.

[0018] In some example embodiments, the main beam comprises a main body segment, two gradual change segments and a connecting segment, the gradual change segments are respectively arranged on two sides of the main body segment, one end of the gradual change segment is connected to the main body segment, and the other end of the gradual change segment is connected to the connecting segment; and the cross-sectional area of the gradual change segment gradually decreases from the main body segment to the connecting segment.

[0019] A lifting system, comprising a liquid tank, a rigging, a crane and the lifting beam assembly as described above, the lifting beam assembly is connected to the crane by the rigging; and the crane is used for lifting and moving the lifting beam assembly, so that the liquid tank can move with the movement of the lifting beam assembly.

[0020] From the above technical solution, the present application has at least the following advantages and positive effects:

[0021] This utility model discloses a lifting beam assembly, comprising a main beam, a lifting device, and secondary beams. One secondary beam is detachably mounted on a first mounting hole in the main beam. Another secondary beam is detachably mounted on a second mounting hole in the main beam. Multiple first and second mounting holes are provided, and the distance between any first and second mounting holes on the main beam corresponds to the first lifting distance for various liquid tanks. Each secondary beam includes a main body and connecting columns. Along the length of the main body, multiple first connecting portions are provided at one end of the main body. Multiple second connecting portions are provided at the other end of the main body. The distance between any first and second connecting portions corresponds to the second lifting distance for various liquid tanks. The lifting device is used to connect the liquid tanks, allowing both ends of the liquid tanks to be connected to the secondary beams via the lifting device. Therefore, the operator can adaptively adjust the distance between the two secondary beams mounted on the main beam according to the first lifting distance of different liquid tanks, and adaptively adjust the connection of the lifting device on the secondary beams according to the second lifting distance of different liquid tanks. It is understood that the lifting beam assembly in this embodiment is universal and can realize the lifting of different types of liquid tanks, thereby effectively saving costs and avoiding the need to set up a separate lifting beam for each project. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of a lifting beam assembly according to one embodiment of the present invention.

[0023] Figure 2 yes Figure 1 The top view of the lifting beam assembly shown.

[0024] Figure 3 yes Figure 1 The front view of the lifting beam assembly shown.

[0025] Figure 4 yes Figure 1 The side view of the lifting beam assembly shown.

[0026] Figure 5 yes Figure 1 A magnified view of part A in the suspended beam assembly shown.

[0027] The annotations in the attached figures are explained as follows:

[0028] 10, main beam; 11, body; 111, groove; 112, first body section; 113, first gradual change section; 114, first connecting section; 12, hoisting column; 13, first mounting hole; 14, second mounting hole; 20, sub beam; 21, first sub beam; 22, second sub beam; 23, body; 231, second body section; 232, second gradual change section; 233, second connecting section; 24, mounting portion; 241, ear plate; 242, support plate; 243, reinforcing plate; 25, lifting lug; 26, first connecting portion; 27, second connecting portion; 28, expansion portion; 281, third connecting column; 282, expansion plate; 283, reinforcing plate; 30, rigging; 40, mounting piece; 50, lifting appliance; 51, first lifting appliance; 52, second lifting appliance. DETAILED DESCRIPTION

[0029] The typical embodiments embodying the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can be varied in a wide range of embodiments, none of which depart from the scope of the present application, and that the description and drawings are to be considered as illustrative only and not restrictive in nature.

[0030] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of direction or positional relationship (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the positions of these elements change, the indications of direction will also change accordingly.

[0031] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0032] The present application provides a hoisting system. The hoisting system comprises a crane (not shown in the figure), a rigging 30, a liquid tank (not shown in the figure) and a hoisting beam assembly. Among them, the liquid tank is connected to the hoisting beam assembly, and the hoisting beam assembly is connected to the crane. The crane is used for lifting and moving the hoisting beam assembly, so that the liquid tank can move with the movement of the hoisting beam assembly. The crane can be a crane, a bridge crane, etc.

[0033] Please refer to Figure 1The crane includes a hook. One end of the rigging 30 is connected to the hook, and the other end is connected to the beam assembly, so that the crane can hoist the beam assembly. The rigging can be a steel wire rope, a nylon rope, a chain, etc.

[0034] In particular, refer to Figure 2 The beam assembly includes a main beam 10. The main beam 10 includes a body 11 and two hoisting columns 12. The top of the body 11 is provided with two grooves 111 along the length direction thereof. Each hoisting column 12 is arranged in a groove 111. The central axis of the hoisting column 12 can be perpendicular to the length direction of the body 11. Two riggings 30 are provided, and two ends of each rigging 30 are connected to the hoisting column 12 and the hook, respectively.

[0035] It should be noted that in the embodiment, one crane can be provided. A rotatable hook can be provided on each crane, and two riggings 30 are connected to the same hook. This arrangement enables the operator to rotate the beam assembly according to the actual working condition to realize the rotation of the liquid tank, so as to adjust the liquid tank to a suitable hoisting state for shipment. This arrangement is particularly suitable for hoisting of an ultra-long liquid tank. In addition, this arrangement can effectively save the cost of providing multiple cranes.

[0036] In addition, it can be understood that the main beam 10 in the beam assembly can be used alone to hoist a smaller model of liquid tank or other hoisted objects, thereby effectively improving the universality of the beam assembly of the present application.

[0037] Referring to Figure 3 In some embodiments, the body 11 of the main beam 10 includes a first main body section 112, two first gradual change sections 113, and two first connecting sections 114. The two grooves 111 can be provided on the two ends of the first main body section 112, respectively. The first gradual change section 113 and the first connecting section 114 are provided on the two sides of the first main body section 112, respectively. One end of the first gradual change section 113 is connected to the first main body section 112, and the other end of the first gradual change section 113 is connected to the first connecting section 114. That is, the first gradual change section 113 is arranged between the first main body section 112 and the connecting section. The cross-sectional area of the first gradual change section 113 gradually decreases in the direction from the first main body section 112 to the first connecting section 114. This arrangement can effectively reduce the weight of the main beam 10 while ensuring the strength of the main beam 10, and is more convenient for transportation. Further, the bottom surface of the first gradual change section 113 is a horizontal surface, and the top surface of the gradual change section is an inclined surface.

[0038] Referring to Figure 3 and in combination with Figure 1The main beam 10 is arranged at an angle with each pair of beams 20. Further, the two pairs of beams 20 are parallel to each other, and each pair of beams 20 is arranged perpendicularly to the main beam 10. This arrangement can effectively disperse the gravity of the liquid tank, so that the gravity of the liquid tank can be evenly transmitted to the main beam 10 through the pair of beams 20, avoiding stress concentration, thereby improving the safety during hoisting of the liquid tank.

[0039] The two ends of the main beam 10 are respectively provided with a first mounting hole 13 and a second mounting hole 14. The beam assembly includes two pairs of beams 20. One pair of beams 20 is detachably mounted on the first mounting hole 13 of the main beam 10, and the other pair of beams 20 is detachably mounted on the second mounting hole 14 of the main beam 10.

[0040] The first mounting hole 13 and the second mounting hole 14 are provided in multiple. Further, the multiple first mounting holes 13 and the multiple second mounting holes 14 are arranged at intervals along the length direction of the main beam 10 body 11. The distance between any first mounting hole 13 and second mounting hole 14 corresponds to the first hoisting distance of multiple liquid tanks.

[0041] It should be noted that the first hoisting distance can refer to the distance between the two end lifting points of the liquid tank along the length direction of the liquid tank, or can refer to the distance between the lifting points along the width direction of the liquid tank. The first hoisting distance in this embodiment is taken as the distance between the lifting points in the length direction of the liquid tank as an example for description.

[0042] In some embodiments of the present application, the first mounting hole 13 and the second mounting hole 14 can be symmetrically arranged with the center line of the main beam 10 as the axis of symmetry. The distance between the first mounting hole 13 and the second mounting hole 14 symmetrically arranged on the main beam 10 can be 18 meters, 20 meters, 22 meters, 24 meters, 28 meters, etc. The specific arrangement can be set according to actual needs, which is not limited herein.

[0043] For the convenience of description, the pair of beams 20 mounted on the first mounting hole 13 is defined as the first pair of beams 21, and the pair of beams 20 mounted on the second mounting hole 14 is defined as the second pair of beams 22.

[0044] It should be noted that when the first pair of beams 21 is mounted on one of the first mounting holes 13, the second pair of beams 22 can be mounted on the second mounting hole 14 symmetrically arranged with the first mounting hole 13, or the second pair of beams 22 can be mounted on other second mounting holes 14 which are not symmetrically arranged with the first mounting hole 13. The specific mounting can be carried out according to actual needs, as long as the center of gravity of the liquid tank can be ensured to be on the same vertical line with the hook of the crane, and the liquid tank can be hoisted stably.

[0045] Therefore, it can be understood that the arrangement of the first mounting hole 13 and the second mounting hole 14 on the main beam 10 enables the beam assembly of the present application to be applicable to hoisting liquid tanks of different lengths.

[0046] Please refer to Figure 4 and in combination Figure 1 In some embodiments, the first mounting hole 13 and the second mounting hole 14 are through holes formed on the front and back sides of the main beam 10. The beam assembly includes a mounting member 40. Each auxiliary beam 20 includes a main body 23 and a mounting portion 24. The mounting portion 24 is mounted on the mounting hole by the mounting member 40 to mount the auxiliary beam 20 on the main beam 10. The mounting portion 24 is protruded on the top of the main body 23 and is located at the center of the main body 23, so that the weight of the two ends of the auxiliary beam 20 can be evenly distributed on the two sides of the main beam 10, which is beneficial to improve the stability of the beam assembly.

[0047] Further, each mounting portion 24 includes two ear plates 241 which are oppositely arranged along the length direction of the auxiliary beam 20. The distance between the two ear plates 241 is greater than the width of the main beam 10, so that the main beam 10 can be accommodated between the two ear plates.

[0048] For the convenience of description, the two ear plates 241 are defined as a first ear plate 241 and a second ear plate 241 respectively. A through hole is formed on each ear plate 241. The through hole corresponds to the mounting hole, so that the mounting member 40 can be sequentially arranged through the through hole on the first ear plate 241, the mounting hole on the main beam 10 and the through hole on the second ear plate 241, thereby mounting the auxiliary beam 20 on the main beam 10. The mounting member 40 can be a bolt, a pin, a peg, etc.

[0049] In some embodiments, the mounting portion 24 further includes a plurality of support plates 242. The support plate 242 is arranged on the side of one ear plate 241 away from the other ear plate 241. One side edge of the support plate 242 is connected to the surface of the main body 11, and the other side edge adjacent to the side edge is connected to the ear plate 241. The arrangement of the support plate 242 can enhance the structural strength of the mounting portion 24, which is beneficial to enhance the connection stability between the main beam 10 and the auxiliary beam 20.

[0050] In some embodiments, the mounting portion 24 further includes a plurality of reinforcing plates 243. The main body 23 is provided with the reinforcing plate 243 on both sides along the width direction thereof. Moreover, one end of the reinforcing plate 243 is connected to the ear plate 241. The arrangement of the reinforcing plate 243 can further enhance the structural strength of the mounting portion 24, which is beneficial to enhance the connection stability between the main beam 10 and the auxiliary beam 20.

[0051] In some embodiments, each pair of beams 20 includes two lifting lugs 25 symmetrically arranged on the top of the main body 23. Specifically, each lifting lug 25 protrudes on the top of the main body 23, and the two lifting lugs 25 are arranged at intervals along the length direction of the main body 23. Such arrangement makes the beam assembly capable of being used without the main beam 10, i.e., each pair of beams 20 is connected to a hook through the rigging 30, or each pair of beams 20 is connected to the same hook through the rigging 30, or a pair of beams 20 is used alone. The beam assembly is used for hoisting smaller models of liquid tanks or other hoisted objects, thereby further improving the versatility of the beam assembly.

[0052] The main body 23 of each pair of beams 20 includes a second main body segment 231, two second gradient segments 232, and two second connecting segments 233. The second main body segment 231 is provided with the second gradient segment 232 and the second connecting segment 233 on both sides, respectively. One end of the second gradient segment 232 is connected to the second main body segment 231, and the other end of the second gradient segment 232 is connected to the second connecting segment 233. That is, the second gradient segment 232 is arranged between the second main body segment 231 and the second connecting segment 233. The cross-sectional area of the second gradient segment 232 gradually decreases from the second main body segment 231 to the second connecting segment 233. Such arrangement can effectively reduce the weight of the pair of beams 20 while ensuring the strength of the pair of beams 20, thereby facilitating hoisting.

[0053] Each pair of beams 20 includes a plurality of first connecting portions 26 and a plurality of second connecting portions 27. Along the length direction of the main body 23, the plurality of first connecting portions 26 are arranged at intervals on one end of the main body 23, and the plurality of second connecting portions 27 are arranged at intervals on the other end of the main body 23.

[0054] The distance between any first connecting portion 26 and second connecting portion 27 corresponds to the second hoisting distance of a plurality of liquid tanks. In the present embodiment, the second hoisting distance refers to the distance between the hoisting points of a liquid tank along the width direction of the liquid tank.

[0055] In some embodiments of the present application, the first connecting portion 26 and the second connecting portion 27 are symmetrically arranged with the center line of the pair of beams 20 as the axis of symmetry. The distance between a first connecting portion 26 and a second connecting portion 27 symmetrically arranged with the first connecting portion 26 can be 7.5 meters, 10 meters, 11 meters, 13 meters, 15 meters, etc. The specific distance can be set according to actual needs, which is not limited herein.

[0056] Please refer to Figure 1 The beam assembly further includes a lifting device 50 which is detachably connected to the pair of beams. The lifting device 50 is used for connecting a liquid tank. The lifting device 50 can be a steel wire rope, a nylon rope, a chain, etc.

[0057] It should be noted that the lifting appliance 50 is usually connected with the lifting point on the liquid tank to connect the liquid tank to the sub-beam 20. In some embodiments, the liquid tank comprises a tank body, a reinforcing ring arranged on the inner circumferential wall of the tank body, and a lifting point arranged on the outer circumferential wall of the tank body and opposite to the reinforcing ring. This arrangement can effectively ensure the strength of the lifting point on the liquid tank and help to enhance the stability when the lifting appliance 50 is connected with the lifting point, thereby improving the safety of the liquid tank hoisting process.

[0058] In addition, the number of lifting points on the liquid tank is not unique and is usually related to the volume and weight of the liquid tank. The larger the volume and the heavier the weight, the more the number of lifting points. The present embodiment is described by taking the liquid tank provided with four lifting points as an example.

[0059] The lifting appliance 50 is provided with four, and two lifting appliances 50 are arranged on each sub-beam 20. For ease of description, the two lifting appliances 50 are defined as a first lifting appliance 51 and a second lifting appliance 52. One end of the first lifting appliance 51 is connected to the first connecting portion 26, and the other end is connected to the lifting point of the liquid tank. One end of the second lifting appliance 52 is connected to the second connecting portion 27, and the other end is connected to another lifting point of the liquid tank along the width direction thereof. This connection mode can ensure that each lifting appliance 50 extends vertically and is in a vertical state. The lifting appliance 50 is perpendicular to both the sub-beam 20 and the liquid tank. It should be noted that the top of the liquid tank is usually provided with a structural platform, such as a liquid inlet, a manhole, a guardrail protruding on the top of the liquid tank, and the like. Therefore, the connection mode in the present application does not produce an included angle less than 90 degrees between the lifting appliance 50 and the liquid tank, thereby avoiding interference with the structural platform on the liquid tank and being beneficial to the protection of the liquid tank.

[0060] In addition, the above arrangement can also minimize the distance between the liquid tank and the lifting beam assembly, so that the liquid tank can cross the lower construction platform during hoisting and transportation without affecting the construction of the construction platform.

[0061] In addition, it should be noted that when the first lifting appliance 51 is connected to one of the first connecting portions 26 on the sub-beam 20, the second lifting appliance 52 can be connected to the second connecting portion 27 symmetrical to the first connecting portion 26, or the second lifting appliance 52 can be connected to the second connecting portion 27 asymmetrical to the second connecting portion 27. The specific arrangement can be set according to actual needs as long as the liquid tank can be hoisted and transported stably.

[0062] The first connecting portion 26 and the second connecting portion 27 can be a hole structure penetrating through both sides of the main body 23 of the sub-beam 20, or a pin shaft structure with an axis perpendicular to the length direction of the main body 23, and the like. The specific arrangement can be set according to actual needs as long as the lifting appliance 50 can be connected to the first connecting portion 26 and the second connecting portion 27.

[0063] Please refer to Figure 5In some embodiments, each pair of beams 20 includes two extensions 28. The two extensions 28 are symmetrically arranged on the two ends of the main body 23. Each extension 28 includes two third connecting columns 281, which are arranged on the two sides of the main body 23, respectively. When four groups of hoisting points are arranged on the partial liquid tank, and each group of hoisting points includes two hoisting points, one lifting tool 50 can be connected to one third connecting column 281, so that the liquid tank can be safely and stably transferred.

[0064] In some embodiments, the extension 28 includes a plurality of extension plates 282 arranged at intervals. The two sides of the main body 23 are respectively provided with two extension plates 282. There is a spacing between the two extension plates 282. The third connecting column 281 is arranged between the two extension plates 282, and the two ends of the third connecting column 281 are respectively connected to the extension plates 282. The extension direction of the central axis of the third connecting column 281 is the same as the length direction of the main body 23 of the pair of beams 20. The third connecting column 281 is spaced apart from the surface of the main body 23, so that the lifting tool 50 can be smoothly connected to the third connecting column 281.

[0065] Among the extension plates 282 arranged on the two sides of the main body 23, the two extension plates 282 away from the center of the main body 23 can be integrally formed.

[0066] In some embodiments, the extension 28 can further include a reinforcing plate 283. The two sides of the reinforcing plate 283 are respectively connected to the side edges of the extension plates 282. The arrangement of the reinforcing plate 283 can effectively enhance the structural strength of the extension 28, help to improve the connection between the lifting tool 50 and the third connecting column 281, and further improve the safety and stability of the liquid tank hoisting process.

[0067] In summary, the hoisting beam assembly of the hoisting system of the present application can be repeatedly used and has universality, and can be applied to the hoisting of liquid tanks of different models, thereby effectively avoiding the waste of costs caused by separately arranging hoisting beams for each project. Moreover, through the structural arrangement of the main beam 10 and the pair of beams 20 in the hoisting beam assembly, when the liquid tank is hoisted, the lifting tool 50 cannot damage the structural platform on the top of the liquid tank.

[0068] The above embodiments are only exemplary structures, and the structures in the embodiments are not fixedly combined. In the absence of structural conflicts, the structures in the embodiments can be arbitrarily combined.

[0069] While the present application has been described with reference to several exemplary embodiments, it is understood that the words that have been used are words of description and illustration, rather than words of limitation. As mentioned above, the present application is capable of taking many forms of implementation and being practiced in various ways, and the above description is not intended to limit the application in any way, except as required by the appended claims and their equivalents.

Claims

1. A spreader beam assembly for hoisting a liquid tank, characterized by include: The main beam has multiple first mounting holes at one end and multiple second mounting holes at the other end along its length. The distance between any of the first mounting holes and the second mounting holes corresponds to the first lifting distance of various liquid tanks. Two secondary beams are provided, which are arranged at an angle to the main beam. One secondary beam is detachably installed on the first mounting hole of the main beam, and the other secondary beam is detachably installed on the second mounting hole of the main beam. Each secondary beam includes a main body, a first connecting part, and a second connecting part. Along the length direction of the main body, a plurality of first connecting parts are provided on one end of the main body, and a plurality of second connecting parts are provided on the other end of the main body. The distance between any first connecting part and second connecting part corresponds to a second hoisting distance between various liquid tanks. A lifting device, detachably connected to the sub-beam, is used to connect the liquid tank.

2. The boom assembly of claim 1, wherein, The first mounting hole and the second mounting hole are symmetrically arranged with the center line of the main beam as the axis; the first connecting part and the second connecting part are symmetrically arranged with the center line of the sub-beam as the axis.

3. The boom assembly of claim 1, wherein, Each of the sub-beams includes two lifting lugs, which are symmetrically arranged on the top of the main body.

4. The boom assembly of claim 1, wherein, Each of the sub-beams includes two extensions, which are symmetrically arranged at two ends of the main body; each extension includes two third connecting columns, which are respectively arranged on both sides of the main body, and one lifting device can be connected to one of the third connecting columns.

5. The boom assembly of claim 1, wherein, The two secondary beams are parallel to each other; each secondary beam is perpendicular to the main beam.

6. The boom assembly of claim 1, wherein, The lifting device is provided in multiple parts, each of which extends vertically; the lifting device is perpendicular to the liquid tank.

7. The boom assembly of claim 1, wherein, The sub-beam includes a mounting part, which is located on the top of the main body and at the center of the main body. The mounting part is mounted on the mounting hole through the mounting member to mount the sub-beam onto the main beam.

8. The boom assembly of claim 1, wherein, The main beam includes a body and two hoisting columns. The top of the body is symmetrically provided with two grooves along the length of the body, and one of the hoisting columns is arranged in one of the grooves.

9. The boom assembly of claim 1, wherein, The main beam includes a main body section, two transition sections, and a connecting section. The transition sections and the connecting sections are respectively provided on both sides of the main body section. One end of the transition section is connected to the main body section, and the other end of the transition section is connected to the connecting section. The cross-sectional area of ​​the transition section gradually decreases from the main body section toward the connecting section.

10. A hoisting system characterized by, The device includes a liquid tank, rigging, a crane, and a lifting beam assembly as described in any one of claims 1 to 9, wherein the lifting beam assembly is connected to the crane via the rigging; the crane is used to lift and move the lifting beam assembly such that the liquid tank can move with the movement of the lifting beam assembly.

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