A hoisting device and method for steel structure roof purlin

Abstract

The application discloses a kind of hoisting equipment of steel structure roof purlin, including base and clamp, the base includes at least two parallel spaced first base and at least two parallel spaced second base, each first base upper surface is detachably arranged, each second base is respectively correspondingly provided with multiple sets of clamps, each set of clamps includes first clamp and second clamp respectively fixedly arranged and movably arranged on the second base, the upper portion of the first clamp and the second clamp of each clamp is elastically connected by spring, the second clamp of the clamp provided at the both ends of each second base is respectively arranged at the outside, and a lifting ring is respectively arranged on the top of each second clamp.The application also discloses a kind of hoisting method of steel structure roof purlin.Application of the present application can effectively ensure the installation speed and precision of steel structure roof purlin, while significantly reducing the occurrence of safety accidents.

Description

Technical Field

[0001] This invention relates to the field of hoisting equipment technology, specifically to hoisting equipment and method for steel structure roof purlins. Background Technology

[0002] In numerous steel structure building construction projects, especially steel structure factory buildings, the hoisting and installation of roof steel purlins is a massive undertaking that directly impacts the project's progress and investment returns. Currently, the common practice for hoisting roof purlins in steel structure buildings involves bundling the purlins together with steel wire ropes, then using a crane to lift the bundled purlins to the roof and place them on steel beams. Each purlin is then manually moved to its designated installation location for secure installation. This conventional method has several drawbacks. For example, bundled purlins are prone to slipping during high-altitude hoisting, posing a risk of falling debris. Furthermore, the need for manual handling of each purlin at height leads to low efficiency and exposes workers to the risk of falls. For the reasons mentioned above, there is an urgent need for hoisting equipment for steel structure roof purlins to improve the installation speed and accuracy of steel structure roof purlins, while also significantly reducing the occurrence of safety accidents. Summary of the Invention

[0003] To address the problems existing in the above-mentioned background technology, the present invention provides a hoisting device and hoisting method for steel structure roof purlins, which can effectively ensure the installation speed and accuracy of steel structure roof purlins, while significantly reducing the occurrence of safety accidents.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0005] This invention discloses a hoisting device for steel structure roof purlins, comprising a base and clamps. The base includes at least two parallel and spaced first bases and at least two parallel and spaced second bases detachably disposed on the upper surface of each first base. Each second base is provided with a plurality of clamps corresponding to each other. Each clamp includes a first clamp and a second clamp that are fixedly disposed and movably disposed on the second base, respectively. The upper parts of the first clamp and the second clamp of each clamp are elastically connected by a spring. The second clamps of the clamps disposed at both ends of each second base are disposed on the outer side and each second clamp is provided with a lifting ring on its top.

[0006] Furthermore, the first base and the second base are connected and fixed together by a base connector; the base connector is a bolt with a specification of not less than M10.

[0007] Furthermore, the first base is made of square steel.

[0008] Furthermore, the second base is made of C-shaped channel steel with the C-shaped channel opening facing upwards, and the first clamp and the second clamp are respectively disposed on the inner side of the second base made of C-shaped channel steel.

[0009] Based on the above technical solution, a method for hoisting steel structure roof purlins using hoisting equipment is described. First, the hoisting equipment is fabricated and assembled according to the dimensions of the roof steel beams under construction, ensuring that the length of the first base is less than the length of the purlin and the length of the second base is less than the clear distance between the roof steel beams. After assembly, the hoisting and installation of the roof steel structure purlins can be carried out. The hoisting equipment is placed on the ground where the purlins need to be hoisted, and the purlins to be hoisted are placed in the first clamp of each set of clamps corresponding to the hoisting equipment. Between the first and second clamps, and close to the second clamp, each first clamp is pushed to move and press against the purlin. Then, each spring is tightened in turn and hung on the upper end of the corresponding first clamp, applying compression force to the purlin and fixing it in place. Next, the wire rope of the crane hook is hung on the lifting rings at the top of each of the four corners of the second clamps of the hoisting equipment and lifted. At the same time, a nylon rope is tied to the hoisting equipment, and the purlin is slowly raised with the hoisting equipment. When the hoisting equipment is lifted to the upper part of the roof steel beam, the rising stops. Workers on the ground tighten or loosen nylon ropes from different angles according to the required placement of the purlins, ensuring the purlins are accurately positioned above the desired installation location. The hoisting equipment is then slowly lowered. When the ends of the purlins clamped on the hoisting equipment reach the top of the two steel beams on the roof, because the length of the first base is shorter than the purlin, the purlin resting on the top of the steel beams experiences an upward counterforce as the hoisting equipment continues to descend. This causes the purlin to shift upwards relative to the hoisting equipment. As the purlin slowly shifts upwards, it compresses the first and second clamps. The springs between the clamps cause the springs to disengage from the top of the first clamp, thereby eliminating the compressive force between the first clamp, the second clamp, and the purlin. The first clamp and the second clamp become loose. At this point, the hoisting equipment continues to descend, disengaging the purlin from the first clamp and the second clamp, and placing it on the roof steel beam where the purlin needs to be installed. The hoisting equipment continues to descend via the hook until it reaches the ground. Then, the purlin to be installed is placed again between the first clamp and the second clamp of the hoisting equipment, and the next cycle of roof purlin hoisting work continues.

[0010] Furthermore, the length of the first base is 800mm-1200mm shorter than the length of the purlin; the length of the second base is 400mm-500mm shorter than the net distance between the roof steel beams; the hoisting equipment stops rising when it is hoisted to 1000mm above the roof steel beams.

[0011] A further improvement to the hoisting equipment for the steel structure roof purlins described in the above technical solution is that the lower part of the first clamp is provided with a slider made of square steel, which can be slidably placed inside the C-shaped groove of the second base; the first clamp is made of C-shaped channel steel and extends out from the opening of the C-shaped groove of the second base; an opening is provided in the middle of the web of the C-shaped channel steel of the first clamp; a connecting rod is movably provided on the inner side through a support rod; one end of the connecting rod extends out from the opening and is connected to a locking tongue; the other end extends out from the opening of the C-shaped groove of the first clamp; and the other end of the locking tongue is rotatably connected to both sides of the opening. The second clamp is made of C-shaped channel steel, with a spring connecting rod running through it near the top and a connecting plate at its bottom. The connecting plate is connected and fixed to the second base via a clamp base connector. The two ends of the spring connecting rod are connected to the two ends of the spring. When the connecting rod extends one end from the C-shaped slot opening of the first clamp and moves downward under the action of an external force, the other end of the connecting rod drives the locking tongue to rotate outward at the opening. When the locking tongue rotates inward under the action of an external force, the other end of the connecting rod connected to it moves inward towards the C-shaped slot opening of the first clamp.

[0012] Furthermore, the clamp base connector is a bolt with a specification of not less than M10.

[0013] Furthermore, the linkage includes a straight rod, the outer side of the middle part of the straight rod is movably connected to the support rod via a support rod wheel, one end of which is connected to an "L"-shaped stop rod, and the other end is rotatably connected to a locking tongue connecting rod via a first pin. The locking tongue connecting rod is connected to the locking tongue, and the bottom of the locking tongue is rotatably connected to both sides of the opening via a second pin.

[0014] Based on the above technical solution, a method for hoisting steel structure roof purlins using hoisting equipment is described. First, the hoisting equipment is manufactured and assembled according to the dimensions of the roof steel beams under construction, ensuring that the length of the first base is less than the length of the purlin and the length of the second base is less than the clear distance between the roof steel beams. After assembly, the hoisting and installation of the roof steel structure purlins can be carried out. The hoisting equipment is placed on the ground where the purlins need to be hoisted. The purlins to be hoisted are placed between the first and second clamps of each set of clamps on the hoisting equipment, and are close to the second clamp. The first clamps are moved sequentially and brought into close contact with the purlins. Then, the springs are tightened sequentially and hung on the upper ends of their corresponding first clamps. The springs apply pressure to the purlins, securing them in place. Simultaneously, the connecting rod, under the downward force of the springs, causes the locking tongue connected to the other end of the connecting rod to rotate out of the orifice. Next, the wire rope of the crane hook is attached to the lifting rings at the top of the second clamps at each of the four corners of the lifting equipment, and the purlins are lifted. A nylon rope is attached to the lifting equipment, and the purlins slowly rise with it. When the lifting equipment is lifted to the upper part of the roof steel beam, the rising stops. Workers on the ground tighten or loosen the nylon ropes from different angles according to the required placement of the purlins, ensuring the purlins are accurately positioned above the desired installation location. The hoisting equipment is then slowly lowered. When the ends of the purlins clamped on the hoisting equipment reach the top of the two steel beams on the roof, because the length of the first base is shorter than the purlin, the purlin resting on the top of the steel beams experiences an upward counterforce as the hoisting equipment continues to descend. This causes the purlin to shift upwards relative to the hoisting equipment. As the purlin slowly shifts upwards, it presses against the locking tongue inside the first clamp, causing it to rotate inwards. The connection to the locking tongue... The other end of the moving rod moves inward toward the C-slot opening of the first clamp and squeezes out the spring hanging on the upper part of the first clamp, thereby causing the squeezing force between the first clamp, the second clamp and the purlin to disappear, and the first clamp and the second clamp to loosen. At this time, the hoisting equipment continues to descend, detaching the purlin from the first clamp and the second clamp, and placing it on the part of the roof steel beam where the purlin needs to be installed. The hook continues to descend until the hoisting equipment lands on the ground, and then the purlin to be installed is placed between the first clamp and the second clamp of the hoisting equipment again, and the next cycle of roof purlin hoisting work continues.

[0015] Furthermore, the length of the first base is 800mm-1200mm shorter than the length of the purlin; the length of the second base is 400mm-500mm shorter than the net distance between the roof steel beams; the hoisting equipment stops rising when it is hoisted to 1000mm above the roof steel beams.

[0016] Compared with existing technologies, the steel structure roof purlin hoisting equipment of the present invention is novel and reasonable in design, simple in structure, and convenient in manufacturing, assembly and use. With the corresponding hoisting method, the first base and the second base provide support for the purlin during transportation. At the same time, the clamps set on the second base use springs to provide tension to clamp the purlin between the first clamp and the second clamp. When the spring presses on the connecting rod on the first clamp, the locking tongue connected to the other end of the connecting rod can be turned out of the hole to block the purlin, effectively ensuring the safety of the purlin during transportation. When the purlin is hoisted into place, the entire hoisting equipment is lowered. The purlin squeezes the locking tongue and drives the connecting rod to rotate, causing the other end of the connecting rod to rotate upward and disengage the spring from the first clamp, making it easy for the purlin to be placed on the roof steel beam where it needs to be installed. At the same time, the hoisting equipment can be safely lowered to the ground. The whole process is safe, efficient and orderly. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the hoisting equipment for the steel roof purlins of the present invention;

[0018] Figure 2 This is a front elevation view of the hoisting equipment for the steel roof purlins of the present invention;

[0019] Figure 3 This is a left elevation view of the hoisting equipment for the steel roof purlins of the present invention;

[0020] Figure 4 This is a plan view of the hoisting equipment for the steel roof purlins of the present invention;

[0021] Figure 5 This is a schematic diagram of the base of the hoisting equipment for the steel roof purlins of the present invention;

[0022] Figure 6 This is a three-dimensional schematic diagram of the clamps of the hoisting equipment for the steel roof purlins of the present invention;

[0023] Figure 7 This is a cross-sectional schematic diagram of the clamps of the hoisting equipment for the steel roof purlins of the present invention;

[0024] Figure 8 This is a schematic diagram of the connecting rod described in the present invention;

[0025] In the diagram: A1, First base; A2, Second base; A3, Base connector; A4, Fixture base connector; B1, First fixture; B2, Second fixture; B3, Lifting ring; B4, Spring connecting rod; B5, Spring; B6, Locking tongue; B7, Linking rod; B7a, Straight rod; B7b, Stop rod; B7c, Locking tongue connecting rod; B8, Support rod; B8a, Support rod wheel; B9, Connecting rod; B10, Slider; B11, First pin; B12, Orifice; B13, Second pin; C, Purlin. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this disclosure pertains. The terms "upper," "lower," "left," "right," "front," and "back" used in the present patent application specification and claims are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Any aspects not detailed in this invention are well-known to those skilled in the art.

[0027] Example 1:

[0028] Please refer to Figure 1-8 This invention discloses a hoisting device for steel structure roof purlins, comprising a base and clamps. The base includes at least two parallel and spaced first bases A1 and at least two parallel and spaced second bases A2 detachably mounted on the upper surface of each first base A1. Each second base A2 is provided with a plurality of clamps corresponding to each other. Each clamp includes a first clamp B1 and a second clamp B2 respectively fixedly mounted and movably mounted on the second base A2. The upper parts of the first clamp B1 and the second clamp B2 of each clamp are elastically connected by a spring B5. The second clamps B2 of the clamps at both ends of each second base A2 are respectively located on the outer side and each second clamp B2 is provided with a lifting ring B3 on its top. The lifting ring B3 is preferably made of galvanized round steel with a specification of φ18 or above, and is used to hang steel wire ropes for hoisting the roof purlin C.

[0029] This embodiment uses two first bases A1 and two second bases A2 disposed on the upper surfaces of the two first bases A1 as examples. The first bases A1 are made of square steel (carbon steel, galvanized steel) with a specification of 100mm×100mm×5mm or larger. The length is slightly shorter than the length of the purlin C used to build the steel structure roof. Its specific length depends on the actual length of the roof purlin C, and the length should preferably be 800mm-1200mm less than the length of the roof purlin C, preferably 1000mm. The second bases A2 are made of C-shaped channel steel (carbon steel) with a specification of 100mm×100mm×20mm×5mm or larger. Made of plain steel or galvanized steel, its C-shaped channel opening faces upwards, and its length should be slightly smaller than the clear distance between the steel beams of the steel structure roof to ensure that the hoisting equipment can pass through the roof steel beams and lift to the top of the roof steel beams when hoisting the purlin C. Specifically, its length is preferably 400mm-500mm less than the clear distance between the beams; the first base A1 and the second base A2 are connected and fixed by a base connector A3, which is a bolt of not less than M10 specification, and the bases are connected by the base connector A3 to form the base; the first clamp B1 and the second clamp B2 are respectively set on the inside of the C-shaped channel steel of the second base A2.

[0030] Based on the above-mentioned hoisting method for steel structure roof purlins, firstly, the hoisting equipment is manufactured and assembled according to the dimensions and specifications of the roof steel beams under construction, ensuring that the length of the first base A1 is less than the length of the purlin C and the length of the second base A2 is less than the net distance between the roof steel beams. After assembly, the hoisting and installation of the roof steel structure purlins can be carried out. The hoisting equipment is placed on the ground where the purlin C to be hoisted is located. The purlin C to be hoisted is placed between the first clamp B1 and the second clamp B2 of each set of clamps on the hoisting equipment, and close to the ground. Using the second clamp B2, each of the first clamps B1 is moved sequentially until it is pressed tightly against the purlin C. Then, each of the springs B5 is pulled tight in sequence and hung on the upper end of the corresponding first clamp B1. The springs B5 apply compressive force to the purlin C and fix it in place. Next, the wire rope of the crane hook is hung on the lifting rings B3 at the top of each of the four corners of the second clamp B2 and lifted. At the same time, a nylon rope is attached to the lifting equipment. The purlin C is slowly raised with the lifting equipment. When the lifting equipment is lifted to the upper part of the roof steel beam, the raising stops, and the work is carried out from the ground. Personnel tighten or loosen the nylon ropes from different angles according to the required placement of purlin C, ensuring purlin C is accurately positioned above the desired installation location. The hoisting equipment is then slowly lowered. When both ends of purlin C, clamped on the hoisting equipment, reach the top of the two steel beams on the roof, because the length of the first base A1 is shorter than that of purlin C, as the hoisting equipment continues to descend, purlin C, resting on the top of the steel beams, will experience an upward counterforce. Purlin C will then displace upwards relative to the hoisting equipment. As purlin C slowly displaces upwards, it will compress the spring B5 between the first clamp B1 and the second clamp B2, causing... Spring B5 disengages from the top of the first clamp B1, causing the squeezing force between the first clamp B1, the second clamp B2, and the purlin C to disappear. The first clamp B1 and the second clamp B2 become loose. At this point, the hoisting equipment continues to descend, disengaging the purlin C from the first clamp B1 and the second clamp B2 and placing it on the roof steel beam where the purlin C needs to be installed. The equipment continues to descend via the hook until it reaches the ground. Then, the purlin C to be installed is placed again between the first clamp B1 and the second clamp B2 of the hoisting equipment, and the next cycle of roof purlin hoisting work continues.

[0031] Example 2:

[0032] Based on the hoisting equipment for the steel roof purlins described in Example 1, a slider B10 made of square steel is welded to the lower part of the first clamp B1. The slider B10 can slide inside the C-shaped groove of the second base A2. The height and width of the slider B10 are slightly smaller than the height and width of the C-shaped channel steel used in the second base A2 by 10mm-20mm, allowing the slider B10 to move freely within the C-shaped channel steel groove of the second base A2 while also fitting well with the C-shaped channel steel of the second base A2. The length of the slider B10 is preferably 300mm-400mm. The first clamp B1 is made of C-shaped channel steel (carbon steel, galvanized steel) and extends from the opening of the C-shaped groove of the second base A2. Its cross-section... The width is approximately 10mm smaller than the net distance of the rolled edge of the C-shaped channel steel used in the second base A2, to ensure that the first clamp B1 can be installed on the C-shaped channel steel of the second base A2 and can move on the C-shaped channel steel of the second base A2; the height of the first clamp B1 is approximately 500mm-600mm, and an opening B12 is provided at approximately the middle position of the web of its C-shaped channel steel, with the size of the opening B12 being approximately 50mm (width) × 100mm (height); a connecting rod B7 is rotatably connected to the inner side of the C-shaped channel steel of the first clamp B1 via a support rod B8, one end of the connecting rod B7 extends from the opening B12 and is connected to a locking tongue B6, and the other end extends from the opening of the C-shaped slot of the first clamp B1, the other end of which is connected to the opening B12. 12. Rotary connection on both sides; the second clamp B2 is made of C-shaped channel steel or square steel, with the same cross-sectional dimensions as the first clamp B1, and its top height is equivalent to that of the first clamp B1; a spring connecting rod B4 is installed through the second clamp B2 near the top, and a connecting plate B9 is welded to its bottom end. The connecting plate B9 is connected and fixed to the second base A2 through the clamp base connector A4; the spring connecting rod B4 is preferably located about 20mm below the top of the second clamp B2, and is made of galvanized round steel or round steel pipe or square steel pipe, with both ends extending about 20mm-40mm beyond the outside of the second clamp B2. The spring connecting rod B4 is used to fix and connect the spring B5; the connecting plate B9 is made of 10 The steel plate is 9 mm thick, and the length and width of the connecting plate are approximately 10 mm to 20 mm greater than the length and width of the cross-section of the second clamp B2. The spring B5 is a steel spring with good elasticity, and the ends of the spring B5 are connected to the two ends of the spring connecting rod B4. The clamp base connecting part A4 is a bolt with a specification of not less than M10. The two ends of the spring connecting rod B4 are connected to the two ends of the spring B5. When the connecting rod B7 extends one end from the C-shaped slot opening of the first clamp B1 and moves downward under the action of external force, the other end of the connecting rod B7 drives the locking tongue B6 to rotate outward at the hole B12. When the locking tongue B6 rotates inward under the action of external force, the other end of the connecting rod B7 connected to it moves inward to the C-shaped slot opening of the first clamp B1.

[0033] In this embodiment, the linkage B7 can be further configured to be made of φ10 galvanized round steel, including a straight rod B7a. The outer side of the middle part of the straight rod B7a is movably connected to the support rod B8 via a support rod wheel B8a, and can rotate around the support rod B8. One end of the straight rod B7a is connected to an "L"-shaped stop rod B7b, and the other end is rotatably connected to a locking tongue connecting rod B7c via a first pin B11. The straight rod B7a and the stop rod B7b are connected as a whole, forming a "Z" shape. The locking tongue connecting rod... The lever B7c is L-shaped. The right-angle hook section of this L-shaped connecting lever is connected to the latch B6, with a length of approximately 50mm. The inclined section is approximately 200mm-300mm long and parallel to the surface of the latch B6. The latch B16 is made of 5mm thick steel plate, and its length and width are slightly smaller than the opening B12 by about 10mm. It is rotatably connected to both sides of the opening B12 by a second pin B13 installed at the bottom of the opening B12, allowing the latch B6 to rotate around the second pin B13. When the L-shaped stop lever B7b moves downward under external force, the movement of the straight lever B7a on the support wheel B8a causes the latch B6 connected to the end of the latch connecting lever B7c to rotate outward from the opening B12. When the latch B6 rotates inward under external force, the latch connecting lever B7c drives the straight lever B7a and the stop lever B7b, causing the end of the stop lever B7b to move upward.

[0034] During the assembly of the hoisting equipment described in this embodiment, the pre-made first clamp B1 and its auxiliary components (slider, etc.), and the second clamp B2 and its auxiliary components (connecting plate, etc.) are first pushed into the groove in a predetermined order from one end of the C-shaped channel steel of the second base A2. Then, the connecting plate B9 of the second clamp B2 is connected and fixed to the second base A2 through the clamp base connector A4. Each set of clamps includes one movable first clamp B1 and one fixed second clamp B2. Each set of clamps clamps and fixes one purlin C. The spacing between the second clamps B2 is determined according to the distance of the roof purlins and is consistent with the distance of the roof purlins. The first clamp B1 is initially installed at any position between two adjacent second clamps B2.

[0035] The hoisting method for the steel structure roof purlins described in this embodiment is as follows: First, the hoisting equipment is manufactured and assembled according to the dimensions of the roof steel beams under construction, ensuring that the length of the first base A1 is less than the length of the purlin C and the length of the second base A2 is less than the net distance between the roof steel beams. After assembly, the hoisting and installation of the roof steel structure purlins can be carried out. The hoisting equipment is placed on the ground where the purlin C needs to be hoisted. The purlin C to be hoisted is placed between the first clamp B1 and the second clamp B2 of each set of clamps on the hoisting equipment, and is close to the second clamp B2. The first clamp B1 is pushed to move in sequence and make it close to the purlin C. Then, each spring B5 is tightened sequentially and hung on the upper end of the corresponding first clamp B1. The springs B5 apply compressive force to the purlin C and fix it in place. At the same time, under the downward force of the springs B5, the locking tongue B6 connected to the other end of the connecting rod B7 rotates out of the hole B12. Next, the wire rope of the crane hook is hung on the lifting rings B3 at the top of the second clamps B2 at the four corners of the hoisting equipment and lifted. At the same time, a nylon rope is tied to the hoisting equipment. The purlin C is slowly raised with the hoisting equipment. When the hoisting equipment is lifted to about 1000mm above the roof steel beam, the rising stops. The workers on the ground place the purlin C according to the required position. By tightening or loosening the nylon ropes from different oblique directions, purlin C is accurately positioned above the desired installation location. The hoisting equipment is then slowly lowered. When both ends of purlin C, clamped on the hoisting equipment, reach the top of the two steel beams on the roof, because the length of the first base A1 is shorter than that of purlin C, as the hoisting equipment continues to descend, purlin C, resting on the top of the steel beams, will experience an upward counterforce. Purlin C will displace upward relative to the hoisting equipment. As purlin C slowly displaces upward, it will press against the locking tongue B6 inside the first clamp B1 (the locking tongue B6 remains tilted when not subjected to external force). The locking tongue B6 will rotate around the second pin B13, and this rotation will drive the pins connected to it... The straight section of the zigzag segment of the linkage B7 rises, which squeezes out the spring B5 hanging on the upper part of the first clamp B1. This causes the squeezing force between the first clamp B1, the second clamp B2, and the purlin C to disappear, and the first clamp B1 and the second clamp B2 to loosen. At this time, the hoisting equipment continues to descend, detaching the purlin C from the first clamp B1 and the second clamp B2 and placing it on the part of the roof steel beam where the purlin C needs to be installed. The hook continues to descend until the hoisting equipment reaches the ground. Then, the purlin C to be installed is placed between the first clamp B1 and the second clamp B2 of the hoisting equipment again, and the next cycle of roof purlin hoisting work continues.

Claims

1. A method for hoisting a steel structure roof purlin, the hoisting equipment comprising a base and clamps, the base comprising at least two parallel and spaced first bases (A1) and at least two parallel and spaced second bases (A2) detachably disposed on the upper surface of each first base (A1), each second base (A2) being provided with a plurality of clamps correspondingly, each clamp comprising a first clamp (B1) and a second clamp (B2) respectively fixedly disposed and movably disposed on the second base (A2), the upper parts of the first clamp (B1) and the second clamp (B2) of each clamp being elastically connected by a spring (B5), the second clamps (B2) of the clamps provided at both ends of each second base (A2) being disposed on the outer side and each second clamp (B2) being provided with a lifting ring (B3) on the top of the second clamp (B2); characterized in that: The hoisting method is as follows: First, the hoisting equipment is fabricated and assembled according to the dimensions and specifications of the roof steel beams under construction. This ensures that the length of the first base (A1) is less than the length of the purlin (C) and the length of the second base (A2) is less than the clear distance between the roof steel beams. After assembly, the hoisting and installation of the roof steel structure purlins can be carried out. The hoisting equipment is placed on the ground where the purlin (C) needs to be hoisted. The purlin (C) to be hoisted is placed between the first clamp (B1) and the second clamp (B2) of each set of clamps on the hoisting equipment, and close to the second clamp (B2). Each first clamp (B1) is then pushed forward in sequence to move and... It is tightly attached to the purlin (C), and then each spring (B5) is tightened in sequence. Each spring (B5) is then hung on the upper end of the corresponding first clamp (B1), and the springs (B5) apply compressive force to the purlin (C) and fix it in place. Next, the wire rope of the crane hook is hung on the lifting rings (B3) at the top of the second clamps (B2) at the four corners of the hoisting equipment and lifted. At the same time, a nylon rope is tied to the hoisting equipment, and the purlin (C) is slowly raised with the hoisting equipment. When the hoisting equipment is lifted to the upper part of the roof steel beam, the raising stops. The workers standing on the ground then adjust the purlin (C) according to its required position from different angles. Tighten or loosen the nylon rope at an angle to accurately position the purlin (C) above the desired installation location. Then, slowly lower the hoisting equipment. When both ends of the purlin (C) clamped on the hoisting equipment reach the top of the two steel beams on the roof, because the length of the first base (A1) is shorter than the purlin (C), the purlin (C) resting on the top of the steel beams will experience an upward counterforce as the hoisting equipment continues to descend. The purlin (C) will have an upward displacement relative to the hoisting equipment. As the purlin (C) slowly moves upward, it will compress the spring (B5) between the first clamp (B1) and the second clamp (B2), causing the spring (B5) to release from the first clamp (B1). B1) detaches from the top, causing the squeezing force between the first clamp (B1), the second clamp (B2), and the purlin (C) to disappear. The first clamp (B1) and the second clamp (B2) loosen. At this time, the hoisting equipment continues to descend, detaching the purlin (C) from the first clamp (B1) and the second clamp (B2) and placing it on the roof steel beam where the purlin (C) needs to be installed. The hoisting equipment continues to descend until it reaches the ground. Then, the purlin (C) to be installed is placed between the first clamp (B1) and the second clamp (B2) of the hoisting equipment again, and the next cycle of roof purlin hoisting work continues.

2. The hoisting method for a steel structure roof purlin hoisting device according to claim 1, characterized in that: The length of the first base (A1) is 800mm-1200mm shorter than the length of the purlin (C); the length of the second base (A2) is 400mm-500mm shorter than the net distance between the roof steel beams; the hoisting equipment stops rising when it is hoisted to 1000mm above the roof steel beams.

3. The hoisting method for a steel structure roof purlin hoisting device according to claim 1, characterized in that: The first base (A1) and the second base (A2) are connected and fixed by a base connector (A3); the base connector (A3) is a bolt with a specification of not less than M10.

4. The hoisting method for a steel structure roof purlin hoisting device according to claim 1, characterized in that: The first base (A1) is made of square steel.

5. A hoisting method for a steel structure roof purlin hoisting device according to any one of claims 1-4, characterized in that: The second base (A2) is made of C-shaped channel steel with its C-shaped channel opening facing upwards. The first clamp (B1) and the second clamp (B2) are respectively disposed on the inner side of the C-shaped channel steel of the second base (A2).

6. A hoisting device for steel structure roof purlins, characterized in that: The device includes a base and clamps. The base includes at least two parallel and spaced first bases (A1) and at least two parallel and spaced second bases (A2) detachably disposed on the upper surface of each first base (A1). Each second base (A2) is provided with a plurality of clamps. Each clamp includes a first clamp (B1) and a second clamp (B2) that are fixedly disposed and movably disposed on the second base (A2). The upper parts of the first clamp (B1) and the second clamp (B2) of each clamp are elastically connected by a spring (B5). The second clamps (B2) of the clamps at both ends of each second base (A2) are respectively disposed on the outer side and each second clamp (B2) is provided with a lifting ring (B3) on the top of each second clamp (B2). The first clamp (B1) has a slider (B10) made of square steel at its lower part. The slider (B10) can slide inside the C-groove of the second base (A2). The first clamp (B1) is made of C-channel steel and extends from the opening of the C-groove of the second base (A2). An opening (B12) is opened in the middle of the web of the C-channel steel of the first clamp (B1). A connecting rod (B7) is movably arranged on the inner side through a support rod (B8). One end of the connecting rod (B7) extends from the opening (B12) and is connected to a locking tongue (B6). The other end extends from the opening of the C-groove of the first clamp (B1). The other end of the locking tongue (B6) is rotatably connected to both sides of the opening (B12). The second clamp (B2) is made of C... Made of channel steel, a spring connecting rod (B4) is installed through it near the top, and a connecting plate (B9) is installed at its bottom end. The connecting plate (B9) is connected and fixed to the second base (A2) through the clamp base connector (A4). The two ends of the spring connecting rod (B4) are connected to the two ends of the spring (B5). When the connecting rod (B7) extends from the C-shaped slot opening of the first clamp (B1) and moves downward under the action of external force, the other end of the connecting rod (B7) drives the locking tongue (B6) to rotate outward at the orifice (B12). When the locking tongue (B6) rotates inward under the action of external force, the other end of the connecting rod (B7) connected to it moves inward to the C-shaped slot opening of the first clamp (B1).

7. The hoisting equipment for steel structure roof purlins according to claim 6, characterized in that: The clamp base connector (A4) is a bolt of not less than M10.

8. The hoisting equipment for steel structure roof purlins according to claim 6, characterized in that: The linkage (B7) includes a straight rod (B7a). The outer side of the middle part of the straight rod (B7a) is movably connected to the support rod (B8) through the support rod wheel (B8a). One end of the straight rod (B7a) is connected to an "L"-shaped stop rod (B7b), and the other end is rotatably connected to a latch connecting rod (B7c) through a first pin (B11). The latch connecting rod (B7c) is connected to the latch (B6). The bottom of the latch (B6) is rotatably connected to both sides of the opening (B12) through a second pin (B13).

9. A hoisting method for a steel structure roof purlin hoisting device according to any one of claims 6-8, characterized in that: First, the hoisting equipment is manufactured and assembled according to the dimensions and specifications of the roof steel beams under construction. This ensures that the length of the first base (A1) is less than the length of the purlin (C) and the length of the second base (A2) is less than the clear distance between the roof steel beams. After assembly, the hoisting and installation of the roof steel structure purlins can be carried out. The hoisting equipment is placed on the ground where the purlin (C) needs to be hoisted. The purlin (C) to be hoisted is placed between the first clamp (B1) and the second clamp (B2) of each set of clamps on the hoisting equipment, and is pressed against the second clamp (B2). Each first clamp (B1) is pushed to move and press against the purlin (C). Then, each spring (B5) is tightened sequentially. Each spring (B5) is hung on the upper end of its corresponding first clamp (B1), applying a compressive force to the purlin (C) through the springs (B5) and fixing it in place. Simultaneously, under the downward force of the springs (B5), the locking tongue (B6) connected to the other end of the connecting rod (B7) rotates out of the orifice (B12). Then, the wire rope of the crane hook is hung on the lifting rings (B3) at the top of each of the four corners of the second clamp (B2) of the hoisting equipment and lifted. A nylon rope is attached to the hoisting equipment, and the purlin (C) slowly rises with it. When the hoisting equipment is lifted to the upper part of the roof steel beam, the rising stops. Workers on the ground then position the purlin (C) according to the required layout. Position the purlin (C) by tightening or loosening the nylon rope from different oblique directions to accurately stop it above the required installation position. Then, slowly lower the hoisting equipment. When both ends of the purlin (C) clamped on the hoisting equipment reach the top of the two steel beams on the roof, because the length of the first base (A1) is shorter than that of the purlin (C), the purlin (C) resting on the top of the steel beams will be subjected to an upward counterforce as the hoisting equipment continues to descend. The purlin (C) will have an upward displacement relative to the hoisting equipment. As the purlin (C) slowly moves upward, it will press against the locking tongue (B6) on the inner side of the first clamp (B1) and make it rotate inward. The other end of the linkage rod (B7) connected to the locking tongue (B6) moves towards the C-shaped part of the first clamp (B1). The inner side of the slot opening moves and squeezes out the spring (B5) hanging on the upper part of the first clamp (B1), thereby causing the squeezing force between the first clamp (B1), the second clamp (B2) and the purlin (C) to disappear. The first clamp (B1) and the second clamp (B2) loosen. At this time, the hoisting equipment continues to descend, detaching the purlin (C) from the first clamp (B1) and the second clamp (B2) and placing it on the part of the roof steel beam where the purlin (C) needs to be installed. The hook continues to descend until the hoisting equipment lands on the ground. Then, the purlin (C) to be installed is placed between the first clamp (B1) and the second clamp (B2) of the hoisting equipment again, and the next cycle of roof purlin hoisting work continues.

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