C-shaped lifting appliance with adjustable gravity center

Abstract

The utility model relates to the technical field of building construction, in particular to a gravity center adjustable C-shaped lifting appliance which comprises a C-shaped box body and a C-shaped lifting lug plate, the C-shaped box body comprises an upper horizontal box body, a lower horizontal box body and a vertical box body, the lower part of the upper plate of the C-shaped lifting lug plate is positioned in the upper horizontal box body, the upper part of the upper plate of the C-shaped lifting lug plate is positioned above the upper horizontal box body, the right-angle side of the side plate of the C-shaped lifting lug plate is positioned in the vertical box body, and the bottom plate of the C-shaped lifting lug plate is positioned in the lower horizontal box body; a part of the integrally formed C-shaped lifting lug plate is connected into the C-shaped box body, the width of the upper plate of the C-shaped lifting lug plate is larger than that of the lower plate of the C-shaped lifting lug plate, and the side plate of the C-shaped lifting lug plate is a right trapezoid plate, so that the thickness of the lower part of the C-shaped lifting appliance is not increased while the connection strength of the C-shaped lifting lug plate and the C-shaped box body is ensured; and a plurality of lifting lug holes are formed in the upper part of the upper plate of the C-shaped lifting lug plate at intervals, so that the center of the lifting appliance can be adjusted on one hand, and the balance of the lifting appliance can be adjusted in the lifting process on the other hand.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building construction, especially relates to a gravity-adjustable C-shaped lifting appliance. BACKGROUND

[0002] When repairing and maintaining a city viaduct, the original plate girder needs to be replaced, since the ground below the original viaduct is a ground road, and the surrounding area is a factory and residential area; and the normal traffic of the ground road also needs to be ensured. Therefore, the construction land is very tight, and the plate girder cannot be directly demolished by blasting, so it is necessary to minimize the damage to the plate girder during the demolition process, and the plate girder without a lifting point needs to be protected and demolished.

[0003] There are two traditional methods for demolishing old plate girders: the first method is to use a traditional C-shaped lifting appliance for hoisting, and the traditional C-shaped lifting appliance generally has two lifting lugs and a balance weight; after the plate girder is loaded onto a vehicle using the traditional C-shaped lifting appliance, it is difficult to remove the lifting appliance, and since there are two lifting lugs and two lifting lug holes, the angle cannot be adjusted; this will make it difficult to remove the lifting appliance; in addition, the balance weight of the lifting appliance will increase the weight of the lifting appliance and increase the difficulty of workers in hanging and removing the lifting appliance. The second method is to drill holes in the plate girder and use a steel wire rope to hoist it, which requires drilling holes in the plate girder before demolition to increase the construction content, and the drilling will damage the structure of the plate girder to some extent and increase the insecurity during the demolition process; the hoisting speed by drilling is slower than that by using a lifting appliance. The defects of the above two methods will result in slower overall construction speed. According to the actual situation of the site and the provisions of the construction period, the traditional lifting appliance cannot meet the hoisting requirements of this project. SUMMARY

[0004] In view of the above problems, the utility model discloses a gravity-adjustable C-shaped lifting appliance, which comprises a C-shaped box body and a C-shaped lug plate.

[0005] The C-shaped lug plate is of an integral structure, and comprises an upper plate, a lower plate and a side plate; the width of the upper plate is greater than that of the lower plate; the side plate is a right-angled trapezoidal plate, and the width of the side plate gradually decreases from top to bottom; and at least four lug holes are arranged at intervals on the upper plate.

[0006] The C-shaped box comprises an upper horizontal box, a lower horizontal box and a vertical box, the lower part of the upper plate of the C-shaped lifting lug plate is located in the upper horizontal box, the upper part of the upper plate of the C-shaped lifting lug plate is located above the upper horizontal box, and the bottom side of the upper plate of the C-shaped lifting lug plate is fixedly connected with the bottom plate of the upper horizontal box, the top plate of the upper horizontal box comprises two split first top plates and second top plates located on both sides of the C-shaped lifting lug plate, and the first top plate and the second top plate are both welded with the side wall of the C-shaped lifting lug plate, the right angle edge of the side plate of the C-shaped lifting lug plate is located in the vertical box, the oblique edge is located outside the vertical box, the bottom plate of the C-shaped lifting lug plate is located in the lower horizontal box, and the upper and lower sides of the bottom plate of the C-shaped lifting lug plate are connected with the top plate of the lower horizontal box and the bottom plate of the lower horizontal box respectively.

[0007] In some embodiments, eight lifting lug holes are arranged on the C-shaped lifting lug plate.

[0008] In some embodiments, the two side plates arranged in front of and behind the C-shaped box are both integral C-shaped side plates.

[0009] In some embodiments, two first reinforcing plates are fixedly arranged at the lower corners of the C-shaped box, and the two first reinforcing plates are fixed on the front and rear sides of the C-shaped box respectively.

[0010] In some embodiments, second reinforcing plates are welded and fixed on both sides of the part of the C-shaped lifting lug plate outside the C-shaped box, and the two second reinforcing plates are provided with through holes corresponding to the lifting lug holes on the C-shaped lifting lug plate.

[0011] In some embodiments, the right angle edge of the C-shaped lifting lug plate is fixedly connected with the side plate of the vertical box adjacent to the opening side of the C-shaped box, the side plate of the vertical box away from the opening side of the C-shaped box comprises two split first side plate and second side plate, the first side plate and the second side plate are both welded with the side wall of the C-shaped lifting lug plate, and the first side plate and the first top plate are an integral structure, and the second side plate and the second top plate are an integral structure.

[0012] In some embodiments, the bottom plate of the upper horizontal box, the side plate of the vertical box arranged adjacent to the opening side of the C-shaped box and the top plate of the lower horizontal box are an integral structure.

[0013] In some embodiments, the bottom plate of the lower horizontal box is an integral structure.

[0014] In some embodiments, the C-shaped lifting lug is welded by steel plate.

[0015] Compared with the prior art, the utility model has at least one of the following advantages or beneficial effects:

[0016] The utility model discloses a gravity adjustable C type hanger, through the integral molding C type lug board part in the C type box, and the width of the upper board of this C type lug board is greater than the width of lower board, and the side board is right trapezoidal board, thereby guaranteeing the connecting strength of C type lug board and C type box, and the thickness of the lower part of this C type hanger can not be increased, and a plurality of lug holes are arranged at the upper part of C type lug board, on one hand, the center of the hanger can be adjusted, on the other hand, the balance of the hanger can be adjusted in the hoisting process, and the balancing weight does not need to be increased, thereby reducing the input of material and manufacturing cost, and the C type hanger can be hung on the lifting machine hook all the time in the use process, and does not need to be disassembled for many times, and has more advantages in construction efficiency, resource utilization, safety reliability and the like. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model and its features, shape and advantages will become more obvious through reading the detailed description of the non - limited embodiment of the following drawings. Same mark indicates same part in all drawings. The drawing can not be drawn according to proportion, and the emphasis is in showing the main idea of the utility model.

[0018] Fig. 1 It is the perspective drawing of the gravity adjustable C type hanger in the utility model embodiment;

[0019] Fig. 2 It is the front view of the gravity adjustable C type hanger in the utility model embodiment;

[0020] Fig. 3 It is the structure schematic view of C type lug board in the utility model embodiment;

[0021] Fig. 4 It is the structure schematic view of integral C type side board in the utility model embodiment;

[0022] Fig. 5 It is the structure schematic view of the first reinforcing plate in the utility model embodiment;

[0023] Fig. 6 It is the structure schematic view of the second reinforcing plate in the utility model embodiment;

[0024] In the figure: 1-C type lifting lug plate; 11-lifting lug hole; 2-integral C type side plate; 3-integral horizontal plate; 4-first reinforcing plate; 5-integral C type plate; 6-7-shaped plate; 7-second reinforcing plate; 71-through hole. DETAILED DESCRIPTION

[0025] The gravity-adjustable C type lifting appliance mainly applies to hoisting links of prefabricated slab beam dismantling, and comprises dismantling prefabricated slab beams, small box girders and installing prefabricated slab beams.

[0026] The gravity-adjustable C type lifting appliance has the advantages of being firm and durable, convenient to obtain materials, low in cost and reusable.

[0027] The utility model discloses a gravity-adjustable C type lifting appliance which is mainly suitable for hoisting links of prefabricated slab beam dismantling.

[0028] As shown in the figure, the utility model discloses a gravity-adjustable C type lifting appliance, which comprises a C type box body and a C type lifting lug plate 1. Figs. 1-6 The C type lifting lug plate 1 is of an integral structure and comprises an upper plate, a lower plate and a side plate. The width of the upper plate is greater than that of the lower plate. The side plate is a right-angled trapezoidal plate, and the width of the side plate is greater at the top and smaller at the bottom. Eight lifting lug holes 11 are arranged at the upper part of the upper plate in intervals. The C type box body comprises an upper horizontal box body, a lower horizontal box body and a vertical box body. The lower part of the upper plate of the C type lifting lug plate 1 is located in the upper horizontal box body, and the upper part of the upper plate of the C type lifting lug plate 1 is located above the upper horizontal box body. The bottom side of the upper plate of the C type lifting lug plate 1 is fixedly connected with the bottom plate of the upper horizontal box body. The top plate of the upper horizontal box body comprises two separate first top plates and second top plates located on both sides of the C type lifting lug plate 1. The first top plate and the second top plate are both weldedly connected with the side wall of the C type lifting lug plate 1. The right-angled edge of the side plate of the C type lifting lug plate 1 is located in the vertical box body, and the oblique edge is located outside the vertical box body. The bottom plate of the C type lifting lug plate 1 is located in the lower horizontal box body, and the bottom plate of the C type lifting lug plate 1 is connected with the top plate of the lower horizontal box body and the bottom plate of the lower horizontal box body respectively.

[0029] The utility model discloses, C -type hanger utilizes the connection of unhooking and steel wire rope, designs eight lifting lug holes 11, first is in order to adjust the gravity center of hanger, second is in order to can adjust hanger balance at will in the hoisting process, need not increase the balance weight and reduce the investment and manufacturing cost of material.

[0030] In the embodiment of the utility model, the two side plates arranged in front and back of the C-shaped box are all integral C-shaped side plates 2. Two first reinforcing plates 4 are fixedly arranged at the corner of the lower part of the C-shaped box, and the two first reinforcing plates 4 are fixed on the front and back sides of the C-shaped box respectively, that is, the two first reinforcing plates 4 are located on the outer sides of the two integral C-shaped side plates 2 respectively. Second reinforcing plates 7 are welded and fixed on the two sides of the part of the C-shaped box outside, and the two second reinforcing plates 7 are provided with through holes 71 corresponding to the lifting lug holes 11 on the C-shaped lug plate 1, so as to reinforce the lifting lug holes 11. The right-angle edge of the C-shaped lug plate 1 is fixedly connected with the side plate of the vertical box close to the opening side of the C-shaped box, the side plate of the vertical box away from the opening side of the C-shaped box comprises two split first side plate and second side plate, the first side plate and the second side plate are all welded and connected with the side wall of the C-shaped lug plate 1, and the first side plate and the first top plate are an integral structure, specifically a 7-shaped plate 6 (the first side plate is the vertical plate of the 7-shaped plate 6, and the first top plate is the horizontal plate of the 7-shaped plate 6), the second side plate and the second top plate are an integral structure, specifically another 7-shaped plate 6 (the second side plate is the vertical plate of the 7-shaped plate 6, and the second top plate is the horizontal plate of the 7-shaped plate 6). The bottom plate of the upper horizontal box, the side plate arranged close to the opening side of the C-shaped box of the vertical box and the top plate of the lower horizontal box are an integral structure, specifically an integral C-shaped plate 5 (that is, the bottom plate of the upper horizontal box is the upper horizontal plate of the integral C-shaped plate 5, the side plate arranged close to the opening side of the C-shaped box of the vertical box is the side plate of the integral C-shaped plate 5, and the lower horizontal plate of the integral C-shaped plate 5 of the lower horizontal box). The bottom plate of the lower horizontal box is an integral horizontal plate 3. The C-shaped hanger is welded by steel plates.

[0031] Specifically, the gravity center adjustable C-shaped hanger is composed of seven different components, wherein one C-shaped lug plate 1, two integral C-shaped side plates 2, one integral horizontal plate 3, two first reinforcing plates 4, one integral C-shaped plate 5, two 7-shaped plates 6 and two second reinforcing plates 7; a total of 11 components.

[0032] The C-shaped lug plate 1 is integrally cut from a steel plate with a thickness of 25mm. Requirements: after the C-shaped lug plate 1 is integrally cut and formed, a lifting lug hole 11 with a diameter of 70mm is drilled at a position 117mm away from the upper edge of the C-shaped lug plate 1, and seven lifting lug holes 11 with the same size and a center distance of 150mm are drilled on the same line. The purpose of arranging eight lifting lug holes 11 is to facilitate the adjustment of the gravity center of the hanger.

[0033] The above-mentioned integral C-shaped side plate 2 is also cut and formed integrally from a q235 steel plate, and one lifting appliance requires two integral C-shaped side plates 2 of the same size and consistent size, and the thickness of the part is 16 mm. Requirement: The main function of the integral C-shaped side plate 2 is to resist shearing, so the part cannot be damaged during cutting.

[0034] The above-mentioned integral horizontal plate 3 is a q235 steel plate with a size of 1520*272*20. Requirement: The steel plate with a size of 1520*272*20 is rolled at a position of 1150 mm with a radius of 200 mm. When rolling the arc of the steel plate, attention should be paid to the heating treatment of the steel plate. Heating can make the steel plate softer, easier to bend, and reduce the stress generated by bending. When heating, attention should be paid to controlling the temperature and uniformity of heating to avoid local overheating or insufficient temperature. After heating, rapid cooling should be carried out to ensure the shape and dimensional accuracy of the workpiece.

[0035] The above-mentioned first reinforcing plate 4 is integrally machined and formed from a q235 steel plate, and the thickness of the first reinforcing plate 4 is 16 mm. The main function of the first reinforcing plate 4 is to reinforce and reduce the deflection of the lifting appliance, thereby increasing safety.

[0036] The above-mentioned integral C-shaped plate 5 is a q235 steel plate with a size of 3500*272*20. Requirement: Two symmetric arcs with a radius of 100 mm are rolled at a position of 1000 mm. When rolling the arc of the steel plate, attention should be paid to the heating treatment of the steel plate. Heating can make the steel plate softer, easier to bend, and reduce the stress generated by bending. When heating, attention should be paid to controlling the temperature and uniformity of heating to avoid local overheating or insufficient temperature. After heating, rapid cooling should be carried out to ensure the shape and dimensional accuracy of the workpiece.

[0037] The above-mentioned 7-shaped plate 6 is a q235 steel plate with a size of 2850*123.5*16. Requirement: A radius of 200 mm is rolled at a position of 1150.

[0038] The above-mentioned second reinforcing plate 7 is machined and formed from a q235 steel plate at one time, and the main function of the second reinforcing plate 7 is to strengthen the strength of the lifting lug hole 11 and increase the shear strength of the lifting lug hole 11. Requirement: The hole of the second reinforcing plate 7 is the same size as the lifting lug hole 11 of the C-shaped lifting lug plate 1.

[0039] The working principle of the above-mentioned gravity-adjustable C-shaped lifting appliance is similar to that of the sling. The lower part of the lifting appliance directly contacts the plate beam, and the plate beam is completely placed in the C-shaped box of the C-shaped lifting appliance. The most convenient place of this device is that when taking the beam, the C-shaped lifting appliance can be directly installed in the corresponding position, and the gravity center of the C-shaped lifting appliance can be adjusted, which is also convenient for unloading the beam. This device is always suspended on the lifting hook of the hoisting machinery during use, and does not need to be disassembled multiple times.

[0040] The core and innovation of the device is that the original lifting appliance is improved according to special working conditions, the lifting appliance under the special working condition is suitable for the conventional working condition, the gravity center of the lifting appliance can be adjusted, the angled plate beam is hoisted, the lifting appliance can be repeatedly used, the cost is economic, and the process is simple.

[0041] The use method of the gravity-adjustable C-shaped lifting appliance is specifically as follows:

[0042] Step one: the C-shaped lifting appliance is transported to the hoisting machine;

[0043] Step two: two steel wires are connected with the lifting appliance through U-shaped shackles respectively;

[0044] Step three: whether the C-shaped lifting appliance is horizontal in the air is observed, if not, the shackles are connected with different lifting lug holes, and the C-shaped lifting appliance is adjusted to be horizontal.

[0045] Step four: the C-shaped lifting appliance is hoisted to the plate beam to be removed by the hoisting machine, the C-shaped lifting appliance is slowly placed on the old plate beam edge by the hoisting machine. When approaching the beam body, manual thrust auxiliary correction is carried out, the lower part of the C-shaped lifting appliance is inserted into the bottom of the plate beam, and the lower part of the C-shaped lifting appliance is perpendicular to the bottom of the plate beam as far as possible;

[0046] Step five: the distance between the C-shaped lifting appliance and the beam edge is checked, if the distance is less than 5 cm, the second beam may be lifted in the hoisting process, which may cause safety hazards, and at this time, the C-shaped lifting appliance needs to be adjusted;

[0047] Step six: whether the boom is perpendicular and has position deviation is observed, whether the lower part of the C-shaped lifting appliance and the bottom of the plate beam are closely attached is observed, if there are similar situations, the defective part is re-adjusted to ensure that the C-shaped lifting appliance and the beam bottom are closely connected;

[0048] Step seven: after the safety is checked, the plate beam at both ends is hoisted at the same time, a suitable space is left for the transport vehicle to reach the beam erection area, and the two ends are lowered at the same time. In the lowering process, the two ends need to be kept horizontal, when the two ends approach the sleeper, they are slowly lowered, and the two ends place the beam on the sleeper at the same time. At this time, the height of the sleeper cannot be lower than 300 mm, if the C-shaped lifting appliance is not convenient to take out, the gravity center of the C-shaped lifting appliance needs to be adjusted to take out the lifting appliance.

[0049] In order to fully exert the function of the C-shaped lifting appliance, the following two aspects should be extended and supplemented in the actual use process:

[0050] In one aspect, the manufacturing process of the C-type sling should be combined with the actual data of the hoisting equipment, and the matching and closure of various design data should be checked. For example, the C-type should always keep the vertical state with the beam body, and if the bending deformation or cracks appear at the welding position, the hoisting should be stopped immediately, all parts should be checked, and the shear resistance of the C-type sling corner should be checked. The C-type sling is mainly used for the removal of plate beams in limited space, and is suitable for areas where construction land is limited and blasting removal or destructive removal cannot be used. It has strong practicality for urban bridge repair and maintenance engineering, saves cost, and reduces the risk of punching and hanging. Although this device is mainly used for hoisting machinery such as automobile hoist and crawler crane, it is not limited to the use of automobile hoist and crawler crane. When the space is sufficient, it can still be used for other mobile cranes. The C-type sling has universality. In this way, the speed of bridge removal can be accelerated, the removed plate beam can be prevented from being structurally damaged for convenient transportation, and the safety during removal can be improved.

[0051] In summary, the utility model discloses a gravity center adjustable C type sling, which is improved on the basis of traditional C type sling with double lifting lugs and balance blocks. The double lifting lugs are improved into multiple lifting lug holes to facilitate adjusting the gravity center of the sling, and the heavy balance blocks are removed. The entire sling is formed by welding seven steel plates, and a steel plate for resisting shear force is added at the center of the sling to increase the safety of the sling. This method reduces the material investment and the manufacturing difficulty, and the installation and removal are simple and convenient at the construction site.

[0052] Those skilled in the art should understand that those skilled in the art can realize the variation examples in combination with the prior art and the above embodiments, which are not described here. Such variation examples do not affect the essential content of the utility model, which is not described here.

[0053] The preferred embodiments of the utility model are described above. It should be understood that the utility model is not limited to the above specific embodiments, and the equipment and structures not fully described should be understood as being implemented in the ordinary way in the art. Any person skilled in the art can make many possible changes and modifications to the technical solutions of the utility model by using the disclosed methods and technical contents without departing from the scope of the technical solutions of the utility model, or modify equivalent embodiments with equivalent changes, which does not affect the essential content of the utility model. Therefore, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the utility model, which does not depart from the content of the technical solutions of the utility model, still belongs to the protection scope of the technical solutions of the utility model.

Claims

1. A C-type sling with adjustable center of gravity, characterized in that: Including C-type box and C-type lug plate; The C-shaped ear plate is an integrated structure, comprising an upper plate, a lower plate and side plates, wherein the width of the upper plate is greater than that of the lower plate, the side plates are right-angled trapezoidal plates, and the width of the side plates is larger at the top and smaller at the bottom, and the upper plate of the upper plate is provided with at least four ear holes at intervals; The C-shaped box body includes an upper horizontal box body, a lower horizontal box body and a vertical box body, the lower part of the upper plate of the C-shaped ear plate is located in the upper horizontal box body, the upper part of the upper plate of the C-shaped ear plate is located above the upper horizontal box body, and the bottom side of the upper plate of the C-shaped ear plate is fixedly connected to the bottom plate of the upper horizontal box body, the top plate of the upper horizontal box body includes two split first top plates and second top plates located on both sides of the C-shaped ear plate, and the first top plates and the second top plates are both welded to the side walls of the C-shaped ear plate, the right-angled sides of the side plates of the C-shaped ear plate are located in the vertical box body, and the hypotenuse is located on the outside of the vertical box body, the bottom plate of the C-shaped ear plate is located in the lower horizontal box body, and the upper and lower sides of the bottom plate of the C-shaped ear plate are respectively connected to the top plate of the lower horizontal box body and the bottom plate of the lower horizontal box body.

2. The center-of-gravity adjustable C-type sling according to claim 1, characterized in that: The C-shaped lug plate is provided with 8 lug holes.

3. The center-of-gravity adjustable C-type sling according to claim 1, characterized in that: The two side panels arranged at the front and rear of the C-shaped box are both integrated C-shaped side panels.

4. The center-of-gravity adjustable C-type sling according to claim 1, characterized in that: Two first reinforcement plates are fixedly provided at the lower corners of the C-shaped box, and the two first reinforcement plates are respectively fixed to the front and rear sides of the C-shaped box.

5. The center-of-gravity adjustable C-type sling according to claim 1, characterized in that: Second reinforcement plates are welded and fixed on both sides of the portion of the C-shaped lifting ear plate located outside the C-shaped box body, and through holes corresponding to the lifting ear holes on the C-shaped lifting ear plate are provided on the two second reinforcement plates.

6. The center-of-gravity adjustable C-type sling according to claim 1, characterized in that: The right-angled side of the C-shaped ear plate is fixedly connected to a side plate of the vertical box body adjacent to the opening side of the C-shaped box body, and a side plate of the vertical box body away from the opening side of the C-shaped box body includes two separate first side plates and a second side plate, and the first side plate and the second side plate are both welded to the side wall of the C-shaped ear plate, and the first side plate and the first top plate are an integrated structure, and the second side plate and the second top plate are an integrated structure.

7. The center-of-gravity adjustable C-type sling according to claim 1, characterized in that: The bottom plate of the upper horizontal box, the side plates of the vertical box body arranged adjacent to the opening side of the C-shaped box body, and the top plate of the lower horizontal box body are an integrated structure.

8. The center-of-gravity adjustable C-type sling according to claim 1, characterized in that: The bottom plate of the lower horizontal box body is an integrated structure.

9. The center-of-gravity adjustable C-type sling according to claim 1, characterized in that: The C-shaped sling is formed by welding steel plates.

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