Lifting appliance and bridge girder erection machine

Abstract

The utility model provides a lifting appliance and a bridge erecting machine, and relates to the technical field of bridge construction equipment. The lifting appliance comprises a lifting frame assembly, double-line lifting rod assemblies, single-line lifting rod assemblies and a pulley assembly, the pulley assembly is installed on the lifting frame assembly and used for being in driving connection with a lifting beam trolley of the bridge girder erection machine, and the two double-line lifting rod assemblies are arranged at the two ends of the lifting frame assembly in the length direction respectively and used for being connected with a double-line box girder in a matched mode. The two single-line suspender assemblies are arranged between the two double-line suspender assemblies at intervals in the length direction of the hanging bracket assembly and used for being connected with a single-line box girder in a matched mode, the single-line suspender assemblies are detachably connected with the hanging bracket assembly and located below the pulley assembly, and first mounting holes are formed in the side wall of the hanging bracket assembly. The projection, on the side wall of the hanging bracket assembly, of the detachable connecting position of the single-line hanging rod assembly and the hanging bracket assembly is located in the first installation hole. According to the lifting appliance, the whole lifting appliance does not need to be detached from a bridge girder erection machine during double-line and single-line conversion, and the construction efficiency of box girder erection can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction equipment, in particular to a hoist and a bridge erecting machine. Background Art

[0002] Box girders are usually prefabricated in factories and transported to construction sites. They are hoisted and erected by bridge-building cranes used in bridge construction, enabling rapid construction of bridges, especially large-span bridges. Depending on the terrain and environmental conditions faced by the line, the box girders used in construction are divided into single-track box girders and double-track box girders.

[0003] At present, when a bridge-building machine is used to lift a box girder, a box girder hoist is required to complete the connection between the bridge-building machine and the box girder. The box girder hoist is a special hoist used for loading, unloading and transporting box girders. Depending on the type of box girder to be lifted, the box girder hoist is also divided into a single-line box girder hoist and a double-line box girder hoist. During the lifting process, different box girder hoists are used to lift the corresponding box girder.

[0004] However, in cases where the line terrain environment is more complex, there may be a need for double-track box girders and single-track box girders to coexist on the same line. At this time, when lifting the box girder, it is necessary to replace the entire box girder lifting equipment according to the erection needs. The replacement convenience is poor, which can easily have an adverse effect on construction efficiency. Utility Model Content

[0005] The problem solved by the utility model is how to meet the needs of lifting and erecting different box girders while improving the construction efficiency of box girder erection.

[0006] To solve the above problems, on the one hand, the utility model provides a kind of sling, including a hanger assembly, a double-line hanger rod assembly, a single-line hanger rod assembly and a pulley assembly, the pulley assembly is installed on the hanger assembly, and is used to be connected with the beam trolley of the bridge erection machine, two groups of the double-line hanger rod assemblies are respectively arranged at the two ends of the length direction of the hanger assembly, and are used to cooperate in connecting the double-line box beam, two groups of the single-line hanger rod assemblies are arranged between the two groups of the double-line hanger rod assemblies along the length direction of the hanger assembly, and are used to cooperate in connecting the single-line box beam, the single-line hanger rod assembly is detachably connected to the hanger assembly, and is located below the pulley assembly, a first mounting hole is provided on the side wall of the hanger assembly, and the projection of the detachable connection between the single-line hanger rod assembly and the hanger assembly on the side wall of the hanger assembly is located in the first mounting hole.

[0007] Compared with the prior art, the beneficial effects of the sling of the utility model include: setting a hanger assembly as the frame structure of the hanger, installing a pulley assembly on the hanger assembly, and the pulley assembly can be connected to the beam trolley of the bridge erection machine. With this arrangement, the bridge erection machine can drive the hanger assembly through the beam trolley and the pulley assembly, thereby driving the hanger assembly to rise and fall and translate. On this basis, two sets of double-line boom assemblies are respectively set at both ends of the length direction of the hanger assembly, and the two sets of double-line boom assemblies can cooperate to connect the double-line box beam. With this arrangement, when it is necessary to lift and erect the double-line box beam, it can be connected to the double-line box beam through the double-line boom assembly, and the bridge erection machine lifts and lowers and translates the hanger assembly through the beam trolley and the pulley assembly, and then the double-line box beam is lifted and lowered and translated through the double-line boom assembly, meeting the lifting and erection needs of the double-line box beam. At the same time, two groups of single-line hanger rod assemblies, which are detachably connected to the hanger assembly, are arranged at intervals in the length direction of the hanger assembly. The two groups of single-line hanger rod assemblies are located between the two groups of double-line hanger rod assemblies and can cooperate to connect the single-line box girder. In this arrangement, when it is necessary to lift and erect the single-line box girder, it is only necessary to connect the two groups of single-line hanger rod assemblies to the hanger assembly to meet the lifting and erection needs of the single-line box girder. At this time, if it is necessary to lift and erect the double-line box girder again, it is only necessary to remove the single-line hanger rod assembly from the hanger assembly without removing the entire hanger from the bridge erection machine. This can effectively shorten the loading and unloading time, thereby improving the construction efficiency of the box girder erection. Moreover, a first mounting hole is provided on the side wall of the hanger assembly, and the single-line hanger rod assembly is located below the pulley assembly. The projection of the detachable connection between the single-line hanger rod assembly and the hanger assembly on the side wall of the hanger assembly is located within the first mounting hole. In this way, the single-line hanger rod assembly is arranged below the pulley assembly, and the connection with the single-line hanger rod assembly is completed by utilizing the structure of the hanger assembly located below the pulley assembly. This does not affect the distribution of the double-line hanger rod assembly on the hanger assembly and the driving of the hanger assembly by the beam trolley through the pulley assembly. Furthermore, the detachable connection between the single-line hanger rod assembly and the hanger assembly can be operated through the first mounting hole on the side wall of the hanger assembly, which can not only improve the convenience of loading and unloading of the single-line hanger rod assembly, thereby improving the construction efficiency of box beam erection, but also avoid affecting other structural parts on the hanger assembly, thereby effectively ensuring the structural stability of the hanger.

[0008] Optionally, the single-wire hanger rod assembly includes a single-wire rod body and a single-wire connecting piece, the single-wire rod body is detachably connected to the hanger assembly via the single-wire connecting piece, a single-wire sliding cavity is provided in the hanger assembly, the single-wire sliding cavity extends along the length direction of the hanger assembly, the single-wire connecting piece is located in the single-wire sliding cavity and is used to move along the single-wire sliding cavity, the single-wire sliding cavity penetrates the side wall of the hanger assembly along the width direction of the hanger assembly and forms the first mounting hole.

[0009] Optionally, the hanger assembly includes a frame body and a first stretcher frame, the frame body is drivingly connected to the hanging beam trolley through the pulley assembly, the first stretcher frame is located between the two double-wire hanger rod assemblies and is installed on the frame body through a first stretcher shaft, the single-wire sliding cavity is located in the first stretcher frame, and a first lifting hole communicating with the single-wire sliding cavity is provided on the bottom wall of the first stretcher frame, and the single-wire rod body is connected to the single-wire connecting piece through the first lifting hole.

[0010] Optionally, a single-wire installation cavity is also provided in the hanger assembly, and the single-wire installation cavity is located on the side of the single-wire sliding cavity away from the double-wire hanger rod assembly. The single-wire installation cavity penetrates upward through the top wall of the hanger assembly and forms a second installation hole. The single-wire connecting piece is used to be placed in the single-wire sliding cavity or the single-wire installation cavity.

[0011] Optionally, the hanger assembly also includes a second stretcher rack, which is located on a side of the first stretcher rack away from the double-wire hanger rod assembly and is installed on the frame body through the first stretcher shaft. The single-wire mounting cavity is located in the second stretcher rack, and a second lifting hole communicating with the single-wire mounting cavity is provided on the bottom wall of the second stretcher rack. The single-wire rod body is used to pass through the second lifting hole to be connected to the single-wire connecting piece.

[0012] Optionally, the pulley assembly and the double-line boom assembly are spaced apart along the length direction of the hanger assembly. A double-line sliding cavity is also provided in the hanger assembly. The double-line sliding cavity extends along the length direction of the hanger assembly. The upper end of the double-line boom assembly is located in the double-line sliding cavity. Two groups of double-line boom assemblies are used to approach or move away from each other through the double-line sliding cavity.

[0013] Optionally, the double-wire hanger rod assembly includes a double-wire rod body and a double-wire connecting piece, the double-wire rod body is detachably connected to the hanger assembly via the double-wire connecting piece, the double-wire connecting piece is located in the double-wire sliding cavity and is used to move along the double-wire sliding cavity, the double-wire sliding cavity penetrates upward through the top wall of the hanger assembly and forms a third mounting hole.

[0014] Optionally, the hanger assembly also includes a third stretcher, which is installed on the frame body through a third stretcher shaft and is located at the end of the frame body along its length direction. The double-wire sliding cavity is located in the third stretcher, and the bottom wall of the third stretcher is provided with a third lifting hole connected to the double-wire sliding cavity, and the double-wire rod body passes through the third lifting hole to be connected to the double-wire connecting piece.

[0015] Optionally, a placement groove opening upward is provided on the top wall of the hanger assembly, the placement groove is located above the single-line hanger assembly, the groove side walls of the placement groove extend upward to form a connecting plate, the pulley assembly is placed in the placement groove, and is connected to the connecting plate via a pulley shaft.

[0016] On the other hand, the utility model also includes a bridge erecting machine, including a beam trolley and the sling as described above.

[0017] Compared with the prior art, the beneficial effects of the bridge erecting machine of the utility model are the same as the beneficial effects of the hoisting device described above, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a lifting device from one perspective in an embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the sling from another perspective in the embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the internal structure of the sling in the embodiment of the utility model.

[0021] Description of reference numerals:

[0022] 1- hanger assembly; 11- first mounting hole; 12- first stretcher frame; 121- first stretcher shaft; 122- first lifting hole; 13- second mounting hole; 14- second stretcher frame; 141- second lifting hole; 15- third mounting hole; 16- third stretcher frame; 161- third stretcher shaft; 162- third lifting hole; 17- placement groove; 171- connecting plate; 2- double-line hanger rod assembly; 21- double-line rod body; 22- double-line connecting piece; 3- single-line hanger rod assembly; 31- single-line rod body; 32- single-line connecting piece; 4- pulley assembly; 41- pulley shaft. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] It should be noted that, in the coordinate system XYZ provided herein, the positive direction of the X axis represents the right, the reverse direction of the X axis represents the left, the positive direction of the Y axis represents the front, the reverse direction of the Y axis represents the back, the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom. At the same time, it should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein.

[0025] On the one hand, an embodiment of the utility model provides a hanger, including a hanger assembly 1, a double-line hanger rod assembly 2, a single-line hanger rod assembly 3 and a pulley assembly 4, the pulley assembly 4 is installed on the hanger assembly 1, and is used to be connected to the beam trolley drive of the bridge erection machine, two groups of double-line hanger rod assemblies 2 are respectively arranged at both ends of the hanger assembly 1 in the length direction, and are used to cooperate in connecting the double-line box beam, two groups of single-line hanger rod assemblies 3 are arranged between the two groups of double-line hanger rod assemblies 2 along the length direction of the hanger assembly 1, and are used to cooperate in connecting the single-line box beam, the single-line hanger rod assembly 3 is detachably connected to the hanger assembly 1, and is located below the pulley assembly 4, a first mounting hole 11 is provided on the side wall of the hanger assembly 1, and the projection of the detachable connection between the single-line hanger rod assembly 3 and the hanger assembly 1 on the side wall of the hanger assembly 1 is located in the first mounting hole 11.

[0026] It should be noted that in the present invention, Figure 1 As shown, the length direction of the hanger assembly 1 is the X-axis direction, the width direction is the Y-axis direction, and the height direction is the Z-axis direction.

[0027] In this embodiment, if Figure 1As shown, a hanger assembly 1 is provided as the frame structure of the hanger, and a pulley assembly 4 is installed on the hanger assembly 1. The pulley assembly 4 can be connected to the beam trolley of the bridge erecting machine. With this arrangement, the bridge erecting machine can drive the hanger assembly 1 through the beam trolley and the pulley assembly 4, thereby driving the hanger assembly 1 to rise, fall and translate. On this basis, two sets of double-line boom assemblies 2 are respectively provided at both ends of the length direction of the hanger assembly 1, and the two sets of double-line boom assemblies 2 can cooperate to connect the double-line box beam. With this arrangement, when it is necessary to lift and erect the double-line box beam, the double-line boom assembly 2 can be connected to the double-line box beam, and the bridge erecting machine can lift, fall and translate the hanger assembly 1 through the beam trolley and the pulley assembly 4, and then realize the lifting, lowering and translation of the double-line box beam through the double-line boom assembly 2, thereby meeting the lifting and erection needs of the double-line box beam. At the same time, two groups of single-line boom assemblies 3, which are detachably connected to the hanger assembly 1, are arranged at intervals in the length direction of the hanger assembly 1. The two groups of single-line boom assemblies 3 are located between the two groups of double-line boom assemblies 2, and can cooperate to connect the single-line box girder. In this arrangement, when it is necessary to lift and erect the single-line box girder, it is only necessary to connect the two groups of single-line boom assemblies 3 to the hanger assembly 1, thereby meeting the lifting and erection needs of the single-line box girder. At this time, if it is necessary to lift and erect the double-line box girder again, it is only necessary to remove the single-line boom assembly 3 from the hanger assembly 1, and there is no need to remove the entire hoist from the bridge erection machine, which can effectively shorten the loading and unloading time, thereby improving the construction efficiency of the box girder erection. Moreover, a first mounting hole 11 is provided on the side wall of the hanger assembly 1, and the single-line hanger rod assembly 3 is located below the pulley assembly 4. The projection of the detachable connection between the single-line hanger rod assembly 3 and the hanger assembly 1 on the side wall of the hanger assembly 1 is located within the first mounting hole 11. In this way, the single-line hanger rod assembly 3 is arranged below the pulley assembly 4, and the connection with the single-line hanger rod assembly 3 is completed by utilizing the structure of the hanger assembly 1 located below the pulley assembly 4, without affecting the distribution of the double-line hanger rod assembly 2 on the hanger assembly 1 and the driving of the hanger assembly 1 by the beam trolley through the pulley assembly 4, and the detachable connection between the single-line hanger rod assembly 3 and the hanger assembly 1 can be operated through the first mounting hole 11 on the side wall of the hanger assembly 1, which can not only improve the convenience of loading and unloading of the single-line hanger rod assembly 3, thereby improving the construction efficiency of box beam erection, but also avoid affecting other structural parts on the hanger assembly 1, effectively ensuring the structural stability of the sling.

[0028] It should be noted that in the present embodiment, the number of each group of double-line boom assemblies 2 and single-line boom assemblies 3 is two, and they are arranged at intervals along the width direction of the hanger assembly 1. In other embodiments of the present invention, the number of each group of double-line boom assemblies 2 and single-line boom assemblies 3 can also be set to one or a plurality greater than two.

[0029] Optionally, the single-wire hanger rod assembly 3 includes a single-wire rod body 31 and a single-wire connector 32. The single-wire rod body 31 is detachably connected to the hanger assembly 1 via the single-wire connector 32. A single-wire sliding cavity is provided in the hanger assembly 1. The single-wire sliding cavity extends along the length direction of the hanger assembly 1. The single-wire connector 32 is located in the single-wire sliding cavity and is used to move along the single-wire sliding cavity. The single-wire sliding cavity penetrates the side wall of the hanger assembly 1 along the width direction of the hanger assembly 1 and forms a first mounting hole 11.

[0030] In this embodiment, if Figure 1 and Figure 3 As shown, a single-line rod body 31 and a single-line connector 32 are provided to form a single-line suspension rod assembly 3, wherein the single-line rod body 31 is detachably connected to the hanger assembly 1 through the single-line connector 32, and at the same time, the single-line rod body 31 can cooperate with the connection of the single-line box beam, thereby realizing the convenient disassembly and assembly of the single-line suspension rod assembly 3 and the hanger assembly 1. On this basis, a single-line sliding cavity is provided in the hanger assembly 1, and the single-line sliding cavity extends along the length direction of the hanger assembly 1, and the single-line connector 32 is located in the single-line sliding cavity and can move along the single-line sliding cavity, thereby driving the single-line rod body 31 to move, and then the single-line rod bodies 31 of the two groups of single-line suspension rod assemblies 3 are brought closer or farther from each other, and cooperated to connect single-line box beams of different apertures, effectively improving the model of single-line box beams that can be hoisted and erected, and improving the applicable scope of the sling. Moreover, the single-line sliding cavity passes through the side wall of the hanger assembly 1 along the width direction of the hanger assembly 1 to form a first mounting hole 11. The single-line connecting piece 32 can be placed in the single-line sliding cavity and connected to the single-line rod body 31 through the first mounting hole 11, so as to realize the connection between the single-line hanger rod assembly 3 and the hanger assembly 1. The single-line connecting piece 32 can also be separated and removed from the single-line rod body 31 through the first mounting hole 11, so as to realize the separation of the single-line hanger rod assembly 3 and the hanger assembly 1, thereby improving the convenience of disassembly and assembly of the single-line hanger rod assembly 3 and improving the construction efficiency of box girder erection.

[0031] It should be noted that, in this embodiment, when the single-line connector 32 moves in the single-line sliding cavity, so that the two sets of single-line suspension rod assemblies 3 are close to or away from each other, the maximum distance between the two sets of single-line suspension rod assemblies 3 is 2400mm, and the minimum distance is 1800mm, which can be matched to connect the single-line box girder with a hole spacing of 1800-2400mm. Of course, in other embodiments of the utility model, the distance range between the two sets of single-line suspension rod assemblies 3 can also be other distance ranges other than the above distance range, and correspondingly, the hole spacing range of the single-line box girder that can be matched to connect can also be other hole spacing ranges other than the above range.

[0032] It should be noted that, in this embodiment, Figure 3As shown, the upper end of the single-wire rod body 31 is provided with a threaded structure, and the single-wire connecting piece 32 includes a first nut and a first gasket. The first gasket is sleeved on the single-wire rod body 31 and is located on the bottom wall of the single-wire sliding cavity. The first nut is threadedly connected to the upper end of the single-wire rod body 31 and is located on the first gasket.

[0033] Optionally, the hanger assembly 1 includes a frame body and a first stretcher frame 12, the frame body is connected to the hanging beam trolley driving through the pulley assembly 4, the first stretcher frame 12 is located between the two double-line hanger rod assemblies 2, and is installed on the frame body through the first stretcher shaft 121, the single-line sliding cavity is located in the first stretcher frame 12, and the bottom wall of the first stretcher frame 12 is provided with a first lifting hole 122 that is connected to the single-line sliding cavity, and the single-line rod body 31 passes through the first lifting hole 122 and is connected to the single-line connecting piece 32.

[0034] In this embodiment, if Figures 1 to 3 As shown, the hanger assembly 1 includes a frame body and a first stretcher frame 12, wherein the frame body is connected to the hanging beam trolley driving through the pulley assembly 4, and the first stretcher frame 12 is located between the two double-line hanger rod assemblies 2, and is installed on the frame body through the first stretcher shaft 121, thereby forming a structural frame that can be connected to the single-line hanger rod assembly 3, and at the same time, the single-line sliding cavity is arranged in the first stretcher frame 12, and the bottom wall of the first stretcher frame 12 is provided with a first lifting hole 122 that is connected to the single-line sliding cavity, and the single-line rod body 31 can pass through the first lifting hole 122 to be connected with the single-line connecting piece 32 in the single-line sliding cavity, so as to realize the connection between the single-line hanger rod assembly 3 and the hanger assembly 1.

[0035] It should be noted that, in this embodiment, Figure 2 and Figure 3 As shown, the single-wire connector 32 can move along the single-wire sliding cavity, thereby driving the single-wire rod body 31 to move along the length direction of the hanger assembly 1. Therefore, the first hanging hole 122 is a waist-shaped hole, and the cross-section of the waist-shaped hole extends along the length direction of the hanger assembly 1.

[0036] It should be noted that in the utility model, a lifting hole connected to the single-line sliding cavity is also provided on the top wall of the first stretcher 12. The lifting hole on the top wall of the first stretcher 12 corresponds to the first lifting hole 122 on the bottom wall up and down and is connected through the single-line sliding cavity to form a through hole. When installing the single-line rod body 31, the single-line rod body 31 can be installed through the lifting hole on the top wall of the first stretcher 12 or the first lifting hole 122 on the bottom wall.

[0037] Optionally, a single-wire installation cavity is also provided in the hanger assembly 1, and the single-wire installation cavity is located on the side of the single-wire sliding cavity away from the double-wire hanger rod assembly 2. The single-wire installation cavity penetrates upward through the top wall of the hanger assembly 1 and forms a second installation hole 13. The single-wire connecting piece 32 is used to be placed in the single-wire sliding cavity or the single-wire installation cavity.

[0038] In this embodiment, if Figure 2 and Figure 3 As shown, in order to realize the lifting and erection of the smallest single-line box girder, a single-line installation cavity is further provided in the hanger assembly 1, wherein the single-line installation cavity is located on the side of the single-line sliding cavity away from the double-line hanger rod assembly 2, and the single-line installation cavity can penetrate upward through the top wall of the hanger assembly 1, thereby forming a second installation hole 13, and the single-line connector 32 can be placed in the single-line sliding cavity or the single-line installation cavity. In this way, when it is necessary to lift and erect the smallest single-line box girder, the single-line connector 32 can be placed in the single-line installation cavity through the second installation hole 13 and connected to the single-line rod body 31. Correspondingly, when it is necessary to lift and erect the ordinary single-line box girder, the single-line connector 32 can be placed in the single-line sliding cavity through the first installation hole 11 and connected to the single-line rod body 31.

[0039] It should be noted that, in this embodiment, Figure 2 As shown, the hole spacing between the two second mounting holes 13 spaced apart along the length direction of the hanger assembly 1 is 1200mm. When the single-line connector 32 is placed in the single-line mounting cavity, the distance between the two sets of single-line hanger rod assemblies 3 is 1200mm, which can be matched to connect a single-line box girder with a hole spacing of 1200mm. Of course, in other embodiments of the utility model, the distance between the two second mounting holes 13 can also be other distances other than the above distances, and correspondingly, the hole spacing of the single-line box girder that can be matched to connect can also be other hole spacings other than the above hole spacings.

[0040] Optionally, the hanger assembly 1 also includes a second stretcher 14, which is located on the side of the first stretcher 12 away from the double-wire hanger rod assembly 2 and is installed on the frame body through a first stretcher shaft 121. The single-wire installation cavity is located in the second stretcher 14, and a second lifting hole 141 connected to the single-wire installation cavity is provided on the bottom wall of the second stretcher 14. The single-wire rod body 31 is used to pass through the second lifting hole 141 to connect with the single-wire connecting piece 32.

[0041] In this embodiment, if Figure 2 and Figure 3 As shown, the hanger assembly 1 also includes a second stretcher 14, wherein the second stretcher 14 is located on the side of the first stretcher 12 away from the double-line hanger rod assembly 2, and can be installed on the frame body through the first stretcher shaft 121, and on this clamping, the single-line mounting cavity is arranged in the second stretcher 14, and the bottom wall of the second stretcher 14 is provided with a second lifting hole 141 connected to the single-line mounting cavity, wherein the single-line rod body 31 can be connected to the single-line connecting member 32 through the second lifting hole 141, and in this arrangement, while the single-line connecting member 32 is placed in the single-line mounting cavity through the second mounting hole 13, the upper end of the single-line rod body 31 is connected to the single-line connecting member 32 through the second lifting hole 141, thereby realizing a stable connection between the second stretcher 14 and the single-line hanger rod assembly 3.

[0042] It should be noted that, in the utility model, a lifting hole connected to the single-line installation cavity is also provided on the top wall of the second stretcher 14. The lifting hole on the top wall of the second stretcher 14 corresponds to the second lifting hole 141 on the bottom wall up and down and is connected through the single-line installation cavity to form a through hole. When installing the single-line rod body 31, the single-line rod body 31 can be installed through the lifting hole on the top wall of the second stretcher 14 or the second lifting hole 141 on the bottom wall.

[0043] Optionally, the pulley assembly 4 and the double-line boom assembly 2 are spaced apart along the length direction of the hanger assembly 1. A double-line sliding cavity is also provided in the hanger assembly 1. The double-line sliding cavity extends along the length direction of the hanger assembly 1. The upper end of the double-line boom assembly 2 is located in the double-line sliding cavity. The two groups of double-line boom assemblies 2 are used to approach or move away from each other through the double-line sliding cavity.

[0044] In this embodiment, if Figure 1 and Figure 3 As shown, the pulley assembly 4 and the double-line boom assembly 2 are arranged at intervals along the length direction of the hanger assembly 1, thereby providing space for the movement of the double-line boom assembly 2 in the length direction of the hanger assembly 1. On this basis, a double-line sliding cavity is arranged in the hanger assembly 1, wherein the double-line sliding cavity is extended along the length direction of the hanger assembly 1, and the upper end of the double-line boom assembly 2 is located in the double-line sliding cavity. Two groups of double-line boom assemblies 2 can approach or move away from each other through the double-line sliding cavity, so that double-line box girders with different apertures can be connected and erected, effectively improving the model of double box girders that can be hoisted and erected, and improving the applicable scope of the sling.

[0045] It should be noted that, in this embodiment, when the two sets of double-line hanger rod assemblies 2 are close to or away from each other, the maximum distance between the two sets of double-line hanger rod assemblies 2 is 4020mm, and the minimum distance is 3300mm, which can be matched to connect double-line box girders with a hole spacing of 3300-4020mm. Of course, in other embodiments of the utility model, the distance range between the two sets of double-line hanger rod assemblies 2 can also be other distance ranges other than the above distance range, and correspondingly, the hole spacing range of the double-line box girders that can be matched to connect can also be other hole spacing ranges other than the above range.

[0046] Optionally, the double-wire hanger rod assembly 2 includes a double-wire rod body 21 and a double-wire connecting piece 22, the double-wire rod body 21 is detachably connected to the hanger assembly 1 via the double-wire connecting piece 22, the double-wire connecting piece 22 is located in the double-wire sliding cavity and is used to move along the double-wire sliding cavity, the double-wire sliding cavity penetrates the top wall of the hanger assembly 1 upward and forms a third mounting hole 15.

[0047] In this embodiment, if Figure 1 and Figure 3As shown, a double-wire rod body 21 and a double-wire connecting piece 22 are provided to form a double-wire hanger rod assembly 2, wherein the double-wire rod body 21 can be detachably connected to the hanger assembly 1 through the double-wire connecting piece 22, and the double-wire connecting piece 22 is located in the double-wire sliding cavity and can move along the double-wire sliding cavity, thereby driving the double-wire rod bodies 21 of the two groups of double-wire hanger rod assemblies 2 to approach or move away from each other, and cooperate to connect double-wire box beams with different apertures, and the double-wire sliding cavity penetrates the top wall of the hanger assembly 1 upward to form a third mounting hole 15, and the double-wire connecting piece 22 can be inserted into or removed from the double-wire sliding cavity through the third mounting hole 15, thereby realizing the rapid connection and separation of the double-wire hanger rod assembly 2 and the hanger assembly 1.

[0048] It should be noted that, in this embodiment, Figure 3 As shown, the upper end of the double-wire rod body 21 is provided with a threaded structure, and the double-wire connecting member 22 includes a second nut and a second gasket. The second gasket is sleeved on the double-wire rod body 21 and is located on the bottom wall of the double-wire sliding cavity. The second nut is threadedly connected to the upper end of the double-wire rod body 21 and is located on the second gasket.

[0049] Optionally, the hanger assembly 1 also includes a third stretcher 16, which is installed on the frame body through a third stretcher shaft 161 and is located at the end of the frame body along its length direction. The double-wire sliding cavity is located in the third stretcher 16, and the bottom wall of the third stretcher 16 is provided with a third lifting hole 162 connected to the double-wire sliding cavity. The double-wire rod body 21 passes through the third lifting hole 162 and is connected to the double-wire connecting piece 22.

[0050] In this embodiment, if Figure 2 As shown, the hanger assembly 1 also includes a third stretcher 16, wherein the third stretcher 16 can be installed on the frame body through a third stretcher shaft 161 and is located at the end of the frame body along its length direction, and the double-line sliding cavity is located in the third stretcher 16, and a third lifting hole 162 connected to the double-line sliding cavity is also provided on the bottom wall of the third stretcher 16, and the double-line rod body 21 can be connected to the double-line connecting piece 22 through the third lifting hole 162, thereby realizing a stable and detachable connection between the double-line hanger rod assembly 2 and the hanger assembly 1.

[0051] It should be noted that, in this embodiment, Figure 2 and Figure 3 As shown, the double-wire connector 22 can move along the double-wire sliding cavity, thereby driving the double-wire rod body 21 to move along the length direction of the hanger assembly 1. Therefore, the third hanging hole 162 is a waist-shaped hole, and the cross-section of the waist-shaped hole extends along the length direction of the hanger assembly 1.

[0052] It should be noted that, in the utility model, a lifting hole connected to the double-wire sliding cavity is also provided on the top wall of the third stretcher 16. The lifting hole on the top wall of the third stretcher 16 corresponds to the third lifting hole 162 on the bottom wall up and down and is connected through the double-wire sliding cavity to form a through hole. When installing the double-wire rod body 21, the double-wire rod body 21 can be installed through the lifting hole on the top wall of the third stretcher 16 or the third lifting hole 162 on the bottom wall.

[0053] Optionally, a placement groove 17 with an opening facing upward is provided on the top wall of the hanger assembly 1, and the placement groove 17 is located above the single-line hanger assembly 3. The groove side walls of the placement groove 17 extend upward to form a connecting plate 171. The pulley assembly 4 is placed in the placement groove 17 and is connected to the connecting plate 171 through the pulley shaft 41.

[0054] In this embodiment, in order to ensure the structural stability of the pulley assembly 4, as shown in FIG. Figure 1 and Figure 3 As shown, a placement groove 17 with an opening upward is provided on the top wall of the hanger assembly 1, wherein the placement groove 17 is located above the single-line hanger rod assembly 3, and the pulley assembly 4 is placed in the placement groove 17, so that the pulley assembly 4 is located above the single-line hanger rod assembly 3. On this basis, the groove side wall of the placement groove 17 extends upward to form a connecting plate 171, and the pulley assembly 4 can be connected to the connecting plate 171 through the pulley shaft 41, so that the pulley assembly 4 and the hanger assembly 1 are stably connected.

[0055] On the other hand, an embodiment of the utility model provides a bridge erecting machine, including a beam trolley and the above-mentioned lifting device.

[0056] The technical effect of the bridge erecting machine in this embodiment is similar to the technical effect of the above-mentioned lifting device, which will not be repeated here.

[0057] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A sling, characterized in that: The invention comprises a hanger assembly (1), a double-line hanger rod assembly (2), a single-line hanger rod assembly (3) and a pulley assembly (4); the pulley assembly (4) is installed on the hanger assembly (1) and is used to drive and connect with the beam trolley of the bridge erection machine; two groups of the double-line hanger rod assemblies (2) are respectively arranged at both ends of the hanger assembly (1) in the length direction and are used to cooperate and connect the double-line box beam; the two groups of the single-line hanger rod assemblies (3) are arranged at intervals along the length direction of the hanger assembly (1); The single-line hanger rod assembly (3) is located between the two groups of the double-line hanger rod assemblies (2) and is used to cooperate with the connection of the single-line box girder. The single-line hanger rod assembly (3) is detachably connected to the hanger assembly (1) and is located below the pulley assembly (4). A first mounting hole (11) is provided on the side wall of the hanger assembly (1). The projection of the detachable connection between the single-line hanger rod assembly (3) and the hanger assembly (1) on the side wall of the hanger assembly (1) is located within the first mounting hole (11).

2. The sling according to claim 1, characterized in that: The single-wire hanger rod assembly (3) comprises a single-wire rod body (31) and a single-wire connecting piece (32), wherein the single-wire rod body (31) is detachably connected to the hanger assembly (1) via the single-wire connecting piece (32), wherein a single-wire sliding cavity is provided in the hanger assembly (1), wherein the single-wire sliding cavity extends along the length direction of the hanger assembly (1), wherein the single-wire connecting piece (32) is located in the single-wire sliding cavity and is used for moving along the single-wire sliding cavity, wherein the single-wire sliding cavity penetrates the side wall of the hanger assembly (1) along the width direction of the hanger assembly (1) and forms the first mounting hole (11).

3. The sling according to claim 2, characterized in that: The hanger assembly (1) comprises a frame body and a first stretcher frame (12); the frame body is connected to the hanging beam trolley through the pulley assembly (4); the first stretcher frame (12) is located between the two double-line hanger rod assemblies (2) and is installed on the frame body through a first stretcher shaft (121); the single-line sliding cavity is located in the first stretcher frame (12); a first lifting hole (122) communicating with the single-line sliding cavity is provided on the bottom wall of the first stretcher frame (12); the single-line rod body (31) passes through the first lifting hole (122) and is connected to the single-line connecting piece (32).

4. The sling according to claim 3, characterized in that: A single-wire installation cavity is also provided in the hanger assembly (1), and the single-wire installation cavity is located on the side of the single-wire sliding cavity away from the double-wire hanger rod assembly (2). The single-wire installation cavity penetrates upward through the top wall of the hanger assembly (1) and forms a second installation hole (13). The single-wire connecting piece (32) is used to be placed in the single-wire sliding cavity or the single-wire installation cavity.

5. The sling according to claim 4, characterized in that: The hanger assembly (1) also includes a second stretcher (14), which is located on a side of the first stretcher (12) away from the double-wire hanger rod assembly (2) and is installed on the frame body through the first stretcher shaft (121); the single-wire installation cavity is located in the second stretcher (14); a second lifting hole (141) communicating with the single-wire installation cavity is provided on the bottom wall of the second stretcher (14); the single-wire rod body (31) is used to pass through the second lifting hole (141) to be connected to the single-wire connecting member (32).

6. The sling according to claim 3, characterized in that: The pulley assembly (4) and the double-line boom assembly (2) are spaced apart along the length direction of the hanger assembly (1); a double-line sliding cavity is also provided in the hanger assembly (1); the double-line sliding cavity extends along the length direction of the hanger assembly (1); the upper end of the double-line boom assembly (2) is located in the double-line sliding cavity; the two groups of double-line boom assemblies (2) are used to approach or move away from each other through the double-line sliding cavity.

7. The sling according to claim 6, characterized in that: The double-wire hanger rod assembly (2) comprises a double-wire rod body (21) and a double-wire connecting piece (22), wherein the double-wire rod body (21) is detachably connected to the hanger assembly (1) via the double-wire connecting piece (22), wherein the double-wire connecting piece (22) is located in the double-wire sliding cavity and is used to move along the double-wire sliding cavity, wherein the double-wire sliding cavity penetrates upward through the top wall of the hanger assembly (1) and forms a third mounting hole (15).

8. The sling according to claim 7, characterized in that: The hanger assembly (1) also includes a third stretcher (16), which is mounted on the frame body via a third stretcher shaft (161) and is located at the end of the frame body along its length direction. The double-line sliding cavity is located in the third stretcher (16), and the bottom wall of the third stretcher (16) is provided with a third lifting hole (162) connected to the double-line sliding cavity. The double-line rod body (21) passes through the third lifting hole (162) to be connected to the double-line connecting piece (22).

9. The spreader according to any one of claims 1 to 5, characterized in that: A placement groove (17) opening upward is provided on the top wall of the hanger assembly (1), the placement groove (17) is located above the single-line hanger assembly (3), the groove side wall of the placement groove (17) extends upward to form a connecting plate (171), the pulley assembly (4) is placed in the placement groove (17), and is connected to the connecting plate (171) via a pulley shaft (41).

10. A bridge erecting machine, characterized in that: It comprises a lifting beam trolley and a lifting device as claimed in any one of claims 1 to 9.

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