Steel truss structure lifting quick dismounting movable lifting point device and control method

Abstract

The invention relates to the field of buildings, in particular to a steel truss structure lifting quick dismantling and moving lifting point device and a control method.The device comprises a lifting point assembly, and the lifting point assembly comprises square steel, a lifting lug, an adjusting assembly and at least one lifting ring assembly; the center of the top of the square steel is connected with the lifting lug. The square steel penetrates through the lifting ring assembly to support the lifting ring assembly. The steel truss penetrates through the interior of the lifting ring assembly. The hanging ring assembly comprises a connecting shaft and a hanging ring, the hanging ring is U-shaped, connecting parts are arranged on the two sides of an opening of the hanging ring, and the connecting shaft penetrates through through holes in the connecting parts on the two sides to be connected with the two sides of the opening of the hanging ring. The adjusting assembly comprises a telescopic mechanism and a pressing plate, and the pressing plate is connected with the extending end of the telescopic mechanism. Through the detachable square steel and the lifting ring assembly, the integrity of an original mechanism is guaranteed, and the reuse rate of the lifting point device is increased. The telescopic mechanism is arranged, so that the lifting point assembly can adapt to steel trusses of different sizes, the application range of the lifting point assembly is wider, and falling can be effectively prevented in the lifting process.

Description

Technical Field

[0001] The present invention relates to the field of construction, and particularly to a device for quickly removing and moving lifting points of a steel truss structure and a control method therefor. Background Art

[0002] Due to its relatively light self-weight and simple construction, steel trusses are widely used in the fields of super high-rise buildings and large-span space structures. The steel truss structure has a high degree of mechanization and high processing accuracy. Usually, each component is first connected into a whole by welding seams, bolts or rivets, and then hoisted and installed.

[0003] Existing hoisting lifting points generally adopt direct welding on the original steel truss structure or use detachable lifting points for fixation.

[0004] During hoisting, a hoisting process method of using a crane, a hook, a steel rope and a hoisting ring to bind and hoist the upper and lower chords of the steel truss is usually adopted. However, in this traditional hoisting method, the sharp edges of the lifting point steel sections are likely to cut the hoisting steel ropes during hoisting, and it is necessary to bind sleepers or cushions. When the position of the lifting point changes during the hoisting process, it is necessary to re-tie and adjust, which is time-consuming and laborious. Moreover, when adjusting the inclination angle of the steel truss during the hoisting and positioning process, there are high requirements for the firmness and stability of the lifting points.

[0005] For example, in a Chinese invention patent with the authorization announcement number CN101712436B and the authorization announcement date December 21, 2011, a steel truss hoisting tool is disclosed, which is composed of hoisting rings. A lifting plate is inserted through the lifting shaft of the hoisting ring. There is an insertion hole penetrating the plate body in the thickness direction on the lifting plate, and a hoisting support plate is inserted into the insertion hole, and both ends of the hoisting support plate extend out of the lifting plate. This structure can quickly realize the installation and disassembly of the lifting points, but the overall stability is not high, and it cannot be applied to steel trusses of different sizes.

[0006] Therefore, there is an urgent need for a device for quickly removing and moving lifting points of a steel truss structure and a control method therefor. Summary of the Invention

[0007] In order to avoid the above problems existing in the prior art, the purpose of the present invention is to provide a device for quickly removing and moving lifting points of a steel truss structure and a control method therefor.

[0008] To achieve the above purpose, the present invention provides the following technical solution: A device for quickly removing and moving lifting points of a steel truss structure, including a lifting point assembly, the lifting point assembly includes a square steel, a lifting lug and at least one lifting ring assembly; the center of the top of the square steel is connected to the lifting lug, and the square steel passes through the inside of the lifting ring assembly to support the lifting ring assembly; the steel truss passes through the inside of the lifting ring assembly;

[0009] The sling assembly includes a connecting shaft and a sling. The sling is a U-shaped sling, and connecting parts are arranged on both sides of the opening of the sling. Through holes are arranged on the connecting parts, and the connecting shaft passes through the through holes on the connecting parts on both sides to connect both sides of the opening of the sling.

[0010] The present invention is further configured such that along the length direction of the square steel, multiple groups of fixing baffles are arranged on the upper part of the square steel, and the connecting shaft is arranged inside the fixing baffles for fixing the sling assembly on the square steel.

[0011] The present invention is further configured such that the square steel is formed by transverse and longitudinal welding of long strip steel pipes.

[0012] The present invention is further configured such that the lifting point assembly further includes an adjusting assembly; the adjusting assembly is arranged at the bottom of the square steel, and the adjusting assembly includes a telescopic mechanism and a pressing plate, and the pressing plate is connected to the extending end of the telescopic mechanism.

[0013] The present invention is further configured such that the lifting point assembly further includes an auxiliary fixing block. The auxiliary fixing block is arranged between the adjusting assembly and the steel truss. The top of the auxiliary fixing block contacts the pressing plate, and a fixing groove is arranged at the bottom, and the fixing groove is clamped with the steel truss.

[0014] The shape of the fixing groove is adapted to the shape of the steel truss.

[0015] The present invention is further configured such that at least one pressure sensor is arranged at the bottom of the pressing plate.

[0016] The present invention is further configured such that the quick lifting, removing and mobile lifting point device for the steel truss structure further includes a hook, a steel rope and a hydraulic cylinder. One end of the steel rope is connected to the lifting lug, and the other end is connected to the hook; the hydraulic cylinder is connected to the steel rope for controlling the length of the steel rope. In the initial state, the hydraulic cylinder is in the extended state.

[0017] The present invention is further configured such that the quick lifting, removing and mobile lifting point device for the steel truss structure further includes a control module, and the control module is electrically connected to the hydraulic cylinder, the pressure sensor and the telescopic device respectively.

[0018] A control method for a quick lifting, removing and mobile lifting point device for a steel truss structure includes:

[0019] S1: Determine the positions of the lifting point assemblies and the number of sling assemblies according to the weight of the steel truss, and install the lifting point assemblies;

[0020] S2: Insert the auxiliary fixing block between the adjusting assembly and the steel truss, and the control module controls the telescopic mechanism to press the auxiliary fixing block onto the steel truss, fix the steel truss and record the pressure value of the pressure sensor;

[0021] S3: The control module monitors the pressure value of the pressure sensor during the hoisting process;

[0022] S4: If the pressure value is less than or equal to the preset release pressure threshold, the control module controls the telescopic mechanism to press down the pressing plate until the pressure value is greater than the preset release pressure threshold;

[0023] S5: Control the contraction length of the hydraulic cylinder on one side of the steel truss to control the inclination angle of the steel truss.

[0024] The present invention is further configured that in step S5, the contraction length m of the hydraulic cylinder is calculated by the following formula:

[0025]

[0026] Wherein, A is the distance from the suspension point to the hook in the initial state, θ is the inclination angle, L is the distance between the suspension points on both sides of the steel truss, and h is the vertical distance from the hook to the connecting line of the suspension points on both sides in the initial state.

[0027] In summary, the beneficial effects of the above technical solutions of the present invention are as follows:

[0028] 1. The present invention provides a movable suspension point that can be quickly disassembled. Through the detachable square steel and the hanging ring assembly, the integrity of the original mechanism is ensured, and the reuse rate of the suspension point device is improved.

[0029] 2. The process of adjusting the suspension point position of the present invention is more convenient and fast compared with the prior art. It only needs to control the telescopic mechanism to retract, remove the auxiliary fixing block, adjust the suspension point assembly to the corresponding position, and then install the auxiliary fixing block to complete the adjustment.

[0030] 3. The telescopic mechanism is provided in the present invention to adapt to steel trusses of different sizes, and the applicable range of the suspension point assembly is wider.

[0031] 4. The hoisting process of the present invention is safer and can effectively prevent falling off; during the hoisting process, the pulling force may cause the square steel to deform, resulting in insufficient fastening force of the suspension point on the steel truss and the situation of the steel truss loosening and falling off. The telescopic mechanism is also provided in the present invention and can cooperate with the pressure sensor. If the pressure value is less than or equal to the preset release pressure threshold, the control module controls the telescopic mechanism to press down the pressing plate to fasten the steel truss and avoid falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0033] Figure 1 It is a schematic diagram of the overall structure of the quick-disassembly movable suspension point device for hoisting the steel truss structure.

[0034] Figure 2 This is the front view of the hoisting point assembly.

[0035] Figure 3 This is the side view of the hoisting point assembly.

[0036] In the attached drawings, the meanings of the respective reference numerals are as follows:

[0037] 100, hoisting point assembly; 101, lifting lug; 102, square steel; 103, telescopic mechanism; 104, auxiliary fixing block; 105, lifting ring; 106, fixed baffle; 107, pressing plate; 108, connecting shaft;

[0038] 200, steel truss; 300, steel rope; 400, hydraulic cylinder; 500, hook. Detailed implementation manners

[0039] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the attached drawings of the present invention. Based on the embodiments in the present invention, other similar embodiments obtained by those of ordinary skill in the art without creative efforts shall all fall within the scope of protection of the present invention.

[0040] In addition, the directional terms mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only references to the directions in the attached drawings. Therefore, the directional terms used are for illustration rather than limitation of the present invention.

[0041] The present invention will be further described below in conjunction with the attached drawings and preferred embodiments.

[0042] Embodiment 1:

[0043] As Figures 1 - 3 shown, this is a preferred embodiment of the present invention, a quick removal and mobile hoisting point device for a steel truss structure, including a hoisting point assembly 100. The hoisting point assembly 100 includes a square steel 102, a lifting lug 101 and at least one lifting ring assembly; the center of the top of the square steel 102 is connected to the lifting lug 101, and the square steel 102 passes through the inside of the lifting ring assembly 100 to support the lifting ring assembly 100; the steel truss 200 passes through the inside of the lifting ring assembly 100.

[0044] The lifting ring assembly includes a connecting shaft 108 and a lifting ring 105. The lifting ring 105 is a U-shaped lifting ring. Connecting parts are provided on both sides of the opening of the lifting ring 105, through holes are provided in the connecting parts, and the connecting shaft 108 passes through the through holes on both sides of the connecting parts to connect both sides of the opening of the lifting ring 105.

[0045] As Figure 3As shown, threads are provided on the connecting shaft 108, and the connecting shaft 108 and the lifting ring 105 are fixedly connected by bolts. When installing the lifting point assembly 100, place the square steel 102 above the steel truss 200. Then, pass the lifting ring 105 through the steel truss 200 and the square steel 102, and connect the connecting shaft 108 at the opening of the lifting ring 105. The steel truss 200 is supported on the square steel by the lifting ring 105.

[0046] The square steel 102 is formed by longitudinally and transversely welding long strip steel pipes. Along the length direction of the square steel 102, multiple groups of fixed baffles 106 are arranged on the upper part of the square steel 102. The connecting shaft 108 is arranged within the fixed baffles 106 and is used to fix the lifting ring assembly on the square steel 102.

[0047] Combined Figure 2 and Figure 3 As shown, every two fixed baffles 106 form a group. The distance between the fixed baffles 106 in each group is set according to the diameter of the connecting shaft 108. Place the connecting shaft 108 within the fixed baffles 106 to realize the connection and fixation of the lifting ring assembly and the square steel 102.

[0048] The lifting point assembly 100 further includes an adjusting assembly; the adjusting assembly is arranged at the bottom of the square steel 102. The adjusting assembly includes a telescopic mechanism 103 and a pressing plate 107, and the pressing plate 107 is connected to the extending end of the telescopic mechanism 103.

[0049] The telescopic mechanism 103 is set according to the size of the square steel 102, and at least two are arranged along the length direction of the square steel 102. In this embodiment, three columns are arranged, with two rows in each column, a total of six telescopic mechanisms 103. The output ends of the telescopic mechanisms 103 are commonly connected to a large-sized pressing plate 107. At least one pressure sensor is arranged at the bottom of the pressing plate 107.

[0050] The lifting point assembly 100 further includes an auxiliary fixing block 104. The auxiliary fixing block 104 is arranged between the adjusting assembly and the steel truss 200. The top of the auxiliary fixing block 104 contacts the pressing plate 107, and a fixing groove is arranged at the bottom. The fixing groove is clamped with the steel truss 200. The shape of the fixing groove is adapted to the shape of the steel truss 200.

[0051] In some embodiments, the extending end of each telescopic mechanism 103 can also be respectively connected to a small-sized pressing plate 107, and a pressure sensor is arranged at the bottom of each small-sized pressing plate 107. According to the pressure of the pressure sensor, the corresponding telescopic mechanism 103 is accurately adjusted.

[0052] The rapid removal and mobile lifting point device for the steel truss structure further includes a hook 500, a steel rope 300, and a hydraulic cylinder 400. One end of the steel rope 300 is connected to the lifting lug 101, and the other end is connected to the hook 500. The hydraulic cylinder 400 is connected to the steel rope 300 and is used to control the length of the steel rope 300. The output end of the hydraulic cylinder 400 is connected to the lifting lug 101 through the steel rope 300, and the other end of the hydraulic cylinder 400 is connected to the hook 500 through the steel rope 300.

[0053] The rapid removal and mobile lifting point device for the steel truss structure further includes a control module, which is electrically connected to the hydraulic cylinder 400, a pressure sensor, and the telescopic device 103 respectively.

[0054] Embodiment 2:

[0055] A control method for the rapid removal and mobile lifting point device of a steel truss structure, which is used in conjunction with the above-mentioned rapid removal and mobile lifting point device of a steel truss structure, includes:

[0056] S1: Determine the position of the lifting point assembly 100 and the number of lifting ring assemblies according to the weight of the steel truss 200, and install the lifting point assembly 100;

[0057] S2: Insert the auxiliary fixing block 104 between the adjusting assembly and the steel truss 200. The control module controls the telescopic mechanism 103 to press the auxiliary fixing block 104 onto the steel truss 200, fix the steel truss 200, and record the pressure value of the pressure sensor;

[0058] S3: The control module monitors the pressure value of the pressure sensor during the hoisting process;

[0059] S4: If the pressure value is less than or equal to the preset falling-off pressure threshold, the control module controls the telescopic mechanism 103 to press down the pressing plate 107 until the pressure value is greater than the preset falling-off pressure threshold;

[0060] S5: By controlling the contraction length of the hydraulic cylinder 400 on one side of the steel truss 200, the inclination angle of the steel truss 200 is controlled.

[0061] The contraction length m of the hydraulic cylinder is calculated by the following formula:

[0062]

[0063] where A is the distance from the lifting point to the hook in the initial state, θ is the inclination angle, L is the distance between the two lifting points on the steel truss, and h is the vertical distance from the hook to the connecting line of the two lifting points in the initial state.

[0064] In summary, the present invention ensures the integrity of the original mechanism through the detachable square steel 102 and the lifting ring assembly, improving the reuse rate of the lifting point device. The telescopic mechanism 103 is provided to adapt to steel trusses 200 of different sizes, making the application range of the lifting point assembly 100 wider; and it can effectively prevent the steel truss 200 from falling off or sliding during the hoisting process.

[0065] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.

Claims

1. A mobile lifting point device for lifting and quickly dismantling a steel truss structure, characterized in that: The invention comprises a lifting point assembly, wherein the lifting point assembly comprises a square steel, a lifting lug and at least one lifting ring assembly; the lifting lug is connected to the center of the top of the square steel, and the square steel passes through the lifting ring assembly to support the lifting ring assembly; a steel truss passes through the interior of the lifting ring assembly; The lifting ring assembly includes a connecting shaft and a lifting ring, wherein the lifting ring is a U-shaped lifting ring, connecting parts are arranged on both sides of the lifting ring opening, the connecting parts are arranged with through holes, and the connecting shaft passes through the through holes on the connecting parts on both sides to connect the two sides of the lifting ring opening.

2. The steel truss structure lifting and rapid removal mobile lifting point device according to claim 1 is characterized in that: A plurality of groups of fixed baffles are arranged on the upper part of the square steel along the length direction of the square steel, and the connecting shaft is arranged in the fixed baffles.

3. The steel truss structure lifting and rapid removal mobile lifting point device according to claim 1 is characterized in that: The square steel is formed by welding long steel pipes vertically and horizontally.

4. The steel truss structure lifting and rapid removal mobile lifting point device according to claim 1 is characterized in that: The hanging point assembly also includes an adjusting assembly; the adjusting assembly is arranged at the bottom of the square steel, and the adjusting assembly includes a telescopic mechanism and a pressing plate, and the pressing plate is connected to the protruding end of the telescopic mechanism.

5. The steel truss structure lifting and rapid removal mobile lifting point device according to claim 4 is characterized in that: The hanging point assembly also includes an auxiliary fixing block, which is arranged between the adjustment assembly and the steel truss. The top of the auxiliary fixing block contacts the pressure plate, and the bottom is provided with a fixing groove, which is clamped with the steel truss.

6. The steel truss structure lifting and rapid removal mobile lifting point device according to claim 5 is characterized in that: At least one pressure sensor is arranged at the bottom of the pressing plate.

7. The mobile lifting point device for lifting and quickly dismantling a steel truss structure according to claim 6 is characterized in that: The steel truss structure lifting and rapid dismantling mobile lifting point device also includes a hook, a steel rope and a hydraulic cylinder, one end of the steel rope is connected to the lifting ear, and the other end is connected to the hook; the hydraulic cylinder is connected to the steel rope for controlling the length of the steel rope.

8. The steel truss structure lifting and rapid removal mobile lifting point device according to claim 7 is characterized in that: The steel truss structure lifting and rapid removal mobile lifting point device also includes a control module, and the control module is electrically connected to the hydraulic cylinder, the pressure sensor and the telescopic device respectively.

9. A control method for a mobile lifting point device for lifting and quickly removing a steel truss structure, used in conjunction with the mobile lifting point device for lifting and quickly removing a steel truss structure according to any one of claims 1 to 8, characterized in that: include: S1: Determine the position of the lifting point assembly and the number of lifting ring assemblies according to the weight of the steel truss, and install the lifting point assembly; S2: insert the auxiliary fixing block between the adjustment assembly and the steel truss, and the control module controls the telescopic mechanism to press the auxiliary fixing block onto the steel truss, fix the steel truss and record the pressure value of the pressure sensor; S3: The control module monitors the pressure value of the pressure sensor during the lifting process; S4: If the pressure value is less than or equal to the preset shedding pressure threshold, the control module controls the telescopic mechanism to press the pressing plate downward until the pressure value is greater than the preset shedding pressure threshold; S5: The inclination angle of the steel truss is controlled by controlling the contraction length of the hydraulic cylinder on one side of the steel truss.

10. The method for controlling a mobile lifting point device for lifting and quickly removing a steel truss structure according to claim 9, characterized in that: In step S5, the hydraulic cylinder retracted length m is calculated by the following formula: Among them, A is the distance from the hanging point to the hook in the initial state, θ is the inclination angle, L is the distance between the hanging points on both sides of the steel truss, and h is the vertical distance from the hook to the connecting line of the hanging points on both sides in the initial state.

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