A magnetic purlin hoisting device and its use method

Abstract

The present invention relates to the field of steel structure factory building installation, and discloses a magnetic purlin hoisting device and a method for using the device, comprising two vertically arranged hangers, each having a plurality of hanging point holes; the hangers are further provided with a plurality of magnetic assemblies, the magnetic assemblies comprising a sliding portion slidably arranged on the hangers and a magnetic portion for adsorbing the purlins; the magnetic portion comprises a transverse mounting plate arranged on the outer wall of a sliding sleeve opposite a cam, the transverse mounting plate being provided with a second trunnion seat, and a rotatable permanent magnetic chuck being provided in the second trunnion seat. The present invention adopts a permanent magnetic chuck as a means for fixing the purlins, thereby avoiding damage to the paint and galvanized layer, being easy to operate, and having no requirements on the width of the purlins, thereby enabling the hoisting of purlins with special-shaped cross-sections; a sliding sleeve bracket is adopted as a means for adjusting the purlin spacing, thereby enabling the purlin spacing to be arbitrarily controlled according to the required size without the need for reprocessing, thereby enabling a set of hoists to complete all purlin installation work, thereby reducing costs, improving installation efficiency, and shortening installation time.

Description

Technical Field

[0001] The present invention relates to the field of steel structure factory building installation, and in particular to a magnetic purlin hoisting device and a use method thereof. Background Art

[0002] During the installation of purlins for steel structure factory walls and roofs, purlins are often constructed of lightweight steel sections, characterized by their long length, light weight, and poor rigidity. Traditionally, on-site installation often involves single-lift installation of each purlin, resulting in low efficiency, high costs, and inaccurate positioning. Occasionally, construction teams create custom tooling, employing methods such as wire rope knots, chains with specialized locks, connecting multiple wire ropes in parallel, and inserting and removing holes in the boom to achieve the goal of hoisting multiple purlins in a single crane lift. However, the flexible materials of wire ropes, chains, and locks can lead to poor rigidity after the purlins are hoisted into position, resulting in inaccurate positioning and wind sway. This necessitates manual adjustment using a crane, a task performed in mid-air, which complicates installation. Furthermore, repeated friction between the tooling and the purlins can easily damage paint and wear out the galvanized coating, impacting installation quality and the purlin's service life.

[0003] On the other hand, while the plug-in method of opening and removing the hanger rods can effectively achieve the positioning of the purlin spacing, any change in the purlin spacing requires the re-manufacturing of the tooling, which is time-consuming and labor-intensive. Most importantly, most of the homemade tooling currently available is only suitable for hanging on the walls of steel structure factories and cannot be applied to the installation of roof and sloped purlins.

[0004] Therefore, a new purlin hoisting device is needed to solve the above technical problems. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the purlin lifting tooling in the prior art is inaccurately positioned, making installation difficult, and repeated friction between the tooling and the purlin part easily causes damage to the paint and wear of the galvanized layer. It cannot be applied to the installation of roof and sloped purlins, and the hanger opening and plugging cannot be applied to the installation of purlins with different spacings.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: a magnetic purlin lifting device, comprising two vertically arranged suspension rods, each having a plurality of suspension point holes; the suspension rods are further provided with a plurality of magnetic assemblies, each of the magnetic assemblies comprising a sliding portion slidably arranged on the suspension rods and a magnetic portion for adsorbing the purlins;

[0007] The sliding portion includes a sliding sleeve sleeved on the outside of the boom, a cam groove being formed on one side of the sliding sleeve, a first ear shaft seat being provided at the cam groove on the inner wall of the sliding sleeve, a cam being rotatably provided in the first ear shaft seat via a pin, an end of the cam extending to the outside of the sliding sleeve via the cam groove, and a handle being provided on the cam side wall outside the sliding sleeve; and a locking frame being provided on the outer wall of the sliding sleeve on both sides of the handle, the locking frame locking the handle position via a transverse cotter pin;

[0008] The magnetic attraction portion comprises a transverse mounting plate arranged on the outer wall of the sliding sleeve on the opposite side of the cam, a second ear shaft seat is provided on the transverse mounting plate, and a rotatable permanent magnetic suction cup is provided in the second ear shaft seat.

[0009] Particularly, the side of the cam that is in close contact with the boom is provided with inclined teeth.

[0010] The present invention also provides a method for using a magnetic purlin hoisting device, comprising the following steps:

[0011] Step S1: Arrange two suspension rods in parallel according to the length of the purlin to be installed, so that the position of the suspension rods corresponds to the optimal stiffness position of the purlin, and then install the corresponding number of magnetic suction components on the suspension rods according to the number of purlins;

[0012] Step S2: Adjust the spacing of the magnetic components according to the spacing of the purlins, press the handle downward so that the cam is pressed against the boom, and insert the cotter pin into the locking frame to lock the handle position;

[0013] Step S3: Arrange the purlins according to the preset positions and press the side handle of the permanent magnetic suction cup to achieve adsorption and fixation of the purlins;

[0014] Step S4: inserting slings into the lifting point holes at different positions of the boom according to the type of the object to be constructed, adjusting the inclination angle of the boom, and performing purlin hoisting;

[0015] Step S5: After the purlin is hoisted into place, the angle is corrected by adjusting the angle of the permanent magnetic chuck in the second trunnion seat.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: the present invention adopts a permanent magnetic suction cup as a means for fixing the purlin, thereby avoiding damage to the paint and galvanized layer, is easy to operate, has no requirements on the width of the purlin, and can realize the lifting of purlins with special cross-sections; adopts a sliding sleeve bracket as a purlin spacing adjustment method, which can arbitrarily control the purlin spacing according to the required size without the need for reprocessing, and realizes that a set of lifting equipment can complete all purlin installation work, thereby reducing costs, improving installation efficiency, and shortening installation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2Schematic diagram of the internal structure of the sleeve.

[0019] Figure 3 Schematic diagram of the magnetic component structure.

[0020] The meanings of the numbers in the figure are: suspension rod—1; suspension point hole—11; sliding sleeve—2; cam groove—22; first ear shaft seat—23; cam—24; handle—25; locking frame—26; cotter pin—27; transverse mounting plate—3; second ear shaft seat—31; permanent magnetic suction cup—32. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention, so as to have a further understanding of the concept of the present invention, the technical problems solved, the technical features constituting the technical solutions and the technical effects brought about.

[0022] like Figures 1 to 3 As shown, a magnetic purlin lifting device includes two vertically arranged suspension rods 1, each having a plurality of suspension point holes 11; the suspension rods 1 are further provided with a plurality of magnetic components, each of which includes a sliding portion slidably arranged on the suspension rods 1 and a magnetic portion for adsorbing the purlin;

[0023] The sliding portion includes a sliding sleeve 2 sleeved on the outside of the boom 1, a cam groove 22 being formed on one side of the sliding sleeve 2, a first trunnion seat 23 being provided at the cam groove 22 on the inner wall of the sliding sleeve 2, a cam 24 being rotatably disposed in the first trunnion seat 23 via a pin, an end of the cam 24 extending to the outside of the sliding sleeve 2 through the cam groove 22, and a handle 25 being provided on the side wall of the cam 24 on the outside of the sliding sleeve 2; and a locking frame 26 being provided on the outer wall of the sliding sleeve 2 on both sides of the handle 25, the locking frame 26 locking the position of the handle 25 via a transverse cotter pin 27;

[0024] The magnetic attraction portion includes a transverse mounting plate 3 provided on the outer wall of the sliding sleeve 2 on the opposite side of the cam 24 . A second trunnion seat 31 is provided on the transverse mounting plate 3 . A rotatable permanent magnetic chuck 32 is provided in the second trunnion seat 31 .

[0025] In the present invention, the hanger 1 can be made of 100*100mm H-shaped steel, made of Q235 carbon structural steel, and the lifting point hole 11 on the hanger 1 is used to connect the shackle. A set of lifting equipment consists of two hangers 1, and the spacing between the hangers 1 determines the optimal stiffness position according to the length of the purlin to reduce the deformation of the purlin. The magnetic suction force of the permanent magnetic suction cup 32 in the sliding assembly is equivalent to the weight of the purlin, so the use of two permanent magnetic suction cups 32 side by side can effectively prevent the purlin from sliding. The permanent magnetic suction cup 32 is oriented vertically upward to prevent the purlin from falling directly from the magnetic suction assembly when the magnetic force fails, which plays a certain safety role. The sliding sleeve 2 is welded from steel plates, and the material is Q235 steel. A rib plate is provided under the transverse mounting plate 3 to enhance the bearing capacity of the transverse mounting plate 3. The size of the sliding sleeve 2 is slightly larger than the boom 1 to ensure that the cam 24 can slide freely on the boom 1 when it is unlocked. The first ear shaft seat 23 in the sliding sleeve 2 serves as the mounting position for the cam 24. After the position of the cam 24 is fixed by the pin, the pin holes are opened on the left and right sides of the first ear shaft seat 23 and the fixing pins are inserted to lock the pin position. The cam 24 can rotate around the pin of the first ear shaft seat 23. When locking is required, the handle 25 is pressed downward to lock the cam 24 and the boom 1. The transverse cotter pin 27 is inserted into the locking frame 26 to prevent the handle 25 from rebounding and ensure that the sliding sleeve 2 and the permanent magnetic suction cup 32 are locked on the boom 1. When disassembly is required, the transverse cotter pin 27 is removed and the handle 25 is lifted.

[0026] As a preferred embodiment, the cam 24 is provided with inclined teeth on the side in close contact with the boom 1 .

[0027] In this embodiment, the function of the inclined teeth is to increase the acting force between the cam 24 and the suspension rod 1 , thereby ensuring that the sliding sleeve 2 does not slip off the suspension rod 1 due to the weight of the purlin and its own weight.

[0028] The present invention also provides a method for using a magnetic purlin hoisting device, comprising the following steps:

[0029] Step S1: Arrange two hangers 1 in parallel according to the length of the purlin to be installed, so that the position of the hanger 1 corresponds to the optimal stiffness position of the purlin, and then install the corresponding number of magnetic components on the hangers 1 according to the number of purlins;

[0030] Step S2: Adjust the spacing of the magnetic components according to the spacing of the purlins, press the handle 25 downward so that the cam 24 is pressed against the boom 1, and then insert the cotter pin 27 into the locking frame 26 to lock the position of the handle 25;

[0031] Step S3: Arrange the purlins according to the preset positions, and press the side handle 25 of the permanent magnetic suction cup 32 to achieve adsorption and fixation of the purlins;

[0032] Step S4: inserting slings into the lifting point holes 11 at different positions of the boom 1 according to the type of the object to be constructed, adjusting the inclination angle of the boom 1, and performing purlin hoisting;

[0033] Step S5: After the purlin is hoisted into place, the angle is corrected by adjusting the angle of the permanent magnetic chuck 32 in the second trunnion seat 31.

[0034] In the actual application process of the device of the present invention, in step S4, when the object to be constructed is a wall, the relevant lifting slings are connected through the lifting point holes 11 at the top of the hanger 1, and the hanger 1 is hoisted in a vertical state to lift the purlins to the position to be installed on the wall. When the object to be constructed is a sloping surface such as a roof or a canopy, by arranging slings in the multiple lifting point holes 11 of the hanger 1 and adjusting the lengths of the different slings, the inclination of the hanger 1 is preliminarily adjusted to fit the slope of the roof or canopy. After the construction is in place, the purlin position is corrected by the rotatable permanent magnetic suction cup 32, so that the device of the present invention can be applied to construction objects with sloping surfaces.

[0035] The terms "connection" and "fixation" appearing in the description of the present invention may refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meanings of the above terms in the present invention shall be understood according to the specific circumstances.

[0036] In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., which indicate the orientation or position relationship, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic purlin lifting device, characterized in that: The invention comprises two vertically arranged suspension rods (1), wherein a plurality of suspension point holes (11) are provided on the suspension rods (1); a plurality of magnetic attraction components are also provided on the suspension rods (1), wherein the magnetic attraction components comprise a sliding portion slidably arranged on the suspension rods (1) and a magnetic attraction portion for adsorbing purlins; The sliding portion includes a sliding sleeve (2) sleeved on the outside of the boom (1), a cam groove (22) is formed on one side of the sliding sleeve (2), a first ear shaft seat (23) is provided at the cam groove (22) on the inner wall of the sliding sleeve (2), a cam (24) is rotatably arranged in the first ear shaft seat (23) through a pin shaft, an end of the cam (24) extends to the outside of the sliding sleeve (2) through the cam groove (22), and a handle (25) is provided on the side wall of the cam (24) outside the sliding sleeve (2); and also includes a locking frame (26) provided on the outer wall of the sliding sleeve (2) on both sides of the handle (25), the locking frame (26) locking the position of the handle (25) through a transverse cotter pin (27); The magnetic attraction portion comprises a transverse mounting plate (3) arranged on the outer wall of the sliding sleeve (2) on the opposite side of the cam (24); a second ear shaft seat (31) is provided on the transverse mounting plate (3); a rotatable permanent magnetic suction cup (32) is provided in the second ear shaft seat (31); and a magnetic attraction surface of the permanent magnetic suction cup (32) faces upward during hoisting.

2. A magnetic purlin lifting device according to claim 1, characterized in that: The cam (24) is provided with inclined teeth on the side in close contact with the boom (1).

3. The method for using the magnetic purlin lifting device according to claim 1, wherein: The steps include: Step S1, arranging two suspension rods (1) in parallel according to the length of the purlin to be installed, so that the position of the suspension rod (1) corresponds to the optimal stiffness position of the purlin, and then sleeves a corresponding number of magnetic suction components on the suspension rod (1) according to the number of purlins; Step S2, adjusting the spacing of the magnetic components according to the spacing of the purlins, and pressing the handle (25) downward so that the cam (24) is pressed against the suspension rod (1), and then inserting the cotter pin (27) into the locking frame (26) to lock the position of the handle (25); Step S3, arranging the purlins according to the preset positions, and pressing the side handle of the permanent magnetic suction cup (32) to achieve adsorption and fixation of the purlins; Step S4, according to the type of the object to be constructed, insert the sling into the lifting point holes (11) at different positions of the suspender (1), adjust the inclination angle of the suspender (1), and carry out purlin lifting; Step S5: After the purlin is hoisted into place, the angle is corrected by adjusting the angle of the permanent magnetic chuck (32) in the second trunnion seat (31).

Images