Anti-falling lifting appliance for prefabricated floating slab

Abstract

The utility model relates to the technical field of engineering, in particular to a prefabricated floating slab anti-dropping lifting appliance, which comprises a shaft and a lifting ring arranged at the top of the shaft, and further comprises a limiting plate and a bearing plate which are the same in shape and size, are positioned at the lower part of the shaft and are sleeved on the shaft, the limiting plate and the bearing plate are at least respectively provided with a convex part, and the convex part is arranged on the lifting ring. The limiting holes can be matched with each other after being rotated by a set angle; the sliding sleeve is arranged on the shaft in a sleeving mode and located above the limiting plate and the bearing plate, and a plurality of limiting stoppers are arranged on the peripheral side of the sliding sleeve; the elastic body sleeves the shaft and is positioned between the sliding sleeve and the limiting plate; and the elastic buckle is installed on the shaft, and when the sliding sleeve moves downwards along the shaft to a set position, the elastic buckle automatically pops up and clamps the sliding sleeve. The device has the advantages that the side space of the floating slab is prevented from being occupied, and the working efficiency is remarkably improved; the hoisting safety of the prefabricated floating slab is enhanced; and rapid, simple and convenient limiting release is realized.

Description

Technical Field

[0001] The utility model relates to the field of engineering technology, and in particular to a precast floating slab anti - detachment sling. Background Technique

[0002] With the rapid development of the urban rail transit industry, the vibration and noise problems generated by subway operation have become important factors affecting the daily life of residents and need to be solved urgently. As an effective means of shock absorption and noise reduction, the precast floating slab track bed technology has been widely used in subway projects. However, due to the large volume and heavy weight of the precast floating slab, its safety, reliability and operational convenience during transportation are particularly important.

[0003] At present, the lifting technologies of precast floating slabs are mainly divided into two types. The first method is to pre - bury lifting sleeves on both sides of the floating slab and use the connection between the sling and the sleeves for lifting. This method is limited by the narrow space in the tunnel, resulting in low disassembly and assembly efficiency. Moreover, due to the small angle between the lifting belt and the horizontal plane, the radial tension distribution is uneven, which may cause instability during transportation. The second method is to use a jacking sleeve for lifting. During operation, two relatively rotatable plates are required. The bottom bearing plate is placed in the groove of the jacking sleeve, and then the top plate is rotated to an appropriate angle, and a pin is inserted through the limit hole to complete the positioning. However, in actual operation, the process of aligning the limit hole and inserting the pin is relatively cumbersome, and due to the limited internal space of the jacking sleeve, the pin is easy to fall off, making the installation process complex and time - consuming.

[0004] In order to improve the lifting efficiency and safety of precast floating slabs, it is necessary to improve and optimize the existing lifting technologies. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a precast floating slab anti - detachment sling to solve the problems of low lifting efficiency and unstable safety of precast floating slabs.

[0006] To achieve the above - mentioned purpose, a precast floating slab anti - detachment sling is designed, which includes a shaft and a lifting ring arranged at the top of the shaft. The sling further includes: a limit plate and a bearing plate, which have the same shape and size, are located at the lower part of the shaft and sleeved on the shaft. The limit plate and the bearing plate are each provided with at least one protruding part, and are respectively provided with limit holes that can be rotated by a set angle and cooperate with each other; a sliding sleeve, sleeved on the shaft and located above the limit plate and the bearing plate, and a plurality of limiters are arranged on the circumferential side of the sliding sleeve; an elastic body, sleeved on the shaft and located between the sliding sleeve and the limit plate; an elastic buckle, installed on the shaft, and when the sliding sleeve moves downward along the shaft to a set position, the elastic buckle automatically pops out and locks the sliding sleeve.

[0007] Preferably, the prefabricated floating plate anti-slip hanger provided by the utility model has other technical features, wherein the limiter includes a limit pin and a connecting plate arranged parallel to the axis, the limit pin is fixedly connected to the sliding sleeve through the connecting plate, the limit pin is plug-in-fitted with the limit hole, and the limiter is used to simultaneously penetrate the limit holes of the limit plate and the load-bearing plate to achieve movement limitation of the limit plate and the load-bearing plate.

[0008] Preferably, the prefabricated floating plate anti-slip hanger provided by the utility model has other technical features, wherein the elastic buckle includes a protrusion and an extension portion, the extension portion is an elastomer, one end of the extension portion is connected to the shaft, and the other end is connected to the protrusion, the extension portion is arranged on the shaft and will not collide and limit with the sliding sleeve, the protrusion protrudes from the shaft, and the extension portion is deformed by pressing the protrusion, and the protrusion on the deformed extension portion avoids the sliding sleeve.

[0009] Preferably, the prefabricated floating plate anti-slip hanger provided by the utility model has other technical features, among which, it also includes a lifting sleeve, the lifting sleeve includes a through columnar structure and a plurality of clamping plates arranged in the columnar structure, the clamping plates are provided with holes matching the shapes of the limiting plates and the bearing plates, and there are gaps between the plurality of clamping plates for accommodating the bearing plates.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] 1. The design of the sling of the utility model allows the installation and removal of the sling to be completed directly inside the lifting sleeve on the top of the floating plate. The sling uses two plates that completely match the shape of the internal notch of the lifting sleeve, where the upper plate is fixed at the notch and the lower plate is embedded in the groove of the lifting sleeve. This design avoids occupying the side space of the floating plate and significantly improves work efficiency. At the same time, by optimizing the angle between the lifting belt and the horizontal plane, the problem of uneven force on the prefabricated floating plate caused by too small an angle is solved.

[0012] 2. The limiter of the utility model is composed of a sliding sleeve and a limit pin, which can effectively prevent the bearing plate from rotating relative to the lifting sleeve during the lifting process. By accurately aligning the limit holes on the limit plate and the bearing plate, the downward sliding limiter can insert three limit pins into the limit holes at one time. These thicker limit pins have excellent shear resistance, which significantly enhances the safety of the prefabricated floating plate lifting.

[0013] 3. A steel spring is provided between the limiter and the limit plate of the utility model. By squeezing the steel spring by the downward limiter sleeve, the elastic buckle can be popped out and clamped on the sliding sleeve to complete the limit operation of the sling. When the limit state needs to be released, just press the elastic buckle, and the compressed spring will lift the limit sliding sleeve, so that the limit pin will pop out from the limit hole, thereby realizing fast and easy limit release. Description of the Drawings

[0014] Figure 1 、 is the overall structural schematic diagram of the precast floating slab anti - detachment lifting tool;

[0015] Figure 2 、 is the structural schematic diagram of the position of the limit hole;

[0016] Figure 3 、 is the overall structural schematic diagram of the lifting tool in the locked state;

[0017] Figure 4 、 is the structural schematic diagram of the jacking sleeve;

[0018] Figure 5 、 is the structural schematic diagram of the lifting tool installed in the sleeve in the unlocked state;

[0019] Figure 6 、 is the structural schematic of the lifting tool installed in the sleeve in the locked state;

[0020] In the figure: 1 limit plate, 101 limit holes of the limit plate, 2 bearing plate, 201 limit holes of the bearing plate, 3 steel spring, 4 limiter, 401 limit pin, 402 connecting plate, 5 sliding sleeve, 6 shaft, 7 lifting ring, 8 elastic buckle, 801 convex block, 802 extension section, 9 jacking sleeve, 901 clamping plate. Detailed Embodiments

[0021] To make the purpose, principle and structure of the present utility model clearer, the following further elaborates in conjunction with the drawings and specific embodiments.

[0022] As Figures 1-4 shown, the present utility model relates to a precast floating slab anti - detachment lifting tool, and its main components include a limit plate 1, a bearing plate 2, a steel spring 3, a limiter 4, a shaft 6, a lifting ring and a buckle 8. These components are all fixed on the same shaft 6. The limit plate 1 and the bearing plate 2 are similar in shape, both are polygonal structures with several protrusions designed along the circumference. The floating jacking sleeve 9 is a columnar structure with a through - hole in the middle, and several clamping plates are arranged inside the columnar structure. The clamping plates are provided with holes that match the shapes of the limit plate 1 and the bearing plate 2. The limit plate 1 and the bearing plate 2 can pass through the holes without hindrance, and there is also a gap between several clamping plates of the floating jacking sleeve 9 for accommodating the bearing plate 2. After passing through the holes, the bearing plate 2 can be limited and accommodated in the gap. Both the limit plate 1 and the bearing plate 2 are provided with three limit holes 101 and 201 with the same diameter, and the angles between the connecting lines of these holes and the axis are all 120°. By rotating the limit plate 1 and the bearing plate 2 relative to each other by 60°, the limit holes on the two plates can be accurately aligned.

[0023] A sleeve 5 and a limiter 4 are provided on the shaft 6, and their function is to prevent the limit plate 1 and the load-bearing plate 2 from rotating relative to each other during the lifting process. The limiter 4 is composed of three limit pins 401, and the limit pins 401 are fixed to the side of the sleeve 5 through the connecting plate 402, and the sleeve 5 can drive the limiter 4 to slide up and down along the shaft 6. A steel spring 3 is installed between the limiter 4 and the limit plate 1, and when the sleeve 5 slides down, the steel spring 3 is compressed. An elastic buckle 8 is also provided on the shaft 6. When the sleeve 5 slides down to the extreme position, the protrusion 801 of the elastic buckle 8 will pop out and clamp the sleeve 5 under the elastic potential energy of the extension section 802 to prevent it from sliding up. The lifting ring 7 is located at the top of the sling and is used to connect with the lifting equipment. The jacking sleeve 9 is located inside the prefabricated floating plate, and a jacking groove composed of a plurality of clamping plates is provided inside the jacking sleeve 9 for bearing.

[0024] The installation method of the prefabricated floating slab anti-drop hanger is as follows:

[0025] Step S1: Rotate the bearing plate 2 and the limiting plate 1 as a whole until they match the shape of the hole of the lifting sleeve 9, and then put the bearing plate 2 and the limiting plate 1 into the lifting sleeve 9 through the hole.

[0026] Step S2: ensure that the limit plate 1 is clamped into the fixture plate of the lifting sleeve 9, and then rotate the shaft 6 to rotate the bearing plate 2 to a certain angle so that the edge of the bearing plate 2 is embedded in the gap of the lifting sleeve.

[0027] Step S3: rotate the carrying plate 2 to align the limiting hole 201 on the carrying plate with the limiting hole 101 on the limiting plate, and then slide the sliding sleeve 5 down to insert the three limiting pins 401 of the limiter 4 into the corresponding limiting holes at the same time.

[0028] Step S4: Continue to slide the sliding sleeve 5 downward until the elastic buckle 8 pops out and presses against the sliding sleeve 5 to form a limit position, thereby completing the overall installation of the sling.

[0029] Step S5: When disassembling the sling, press the extended section 802 of the elastic buckle 8 to make the protrusion 801 retreat and avoid the sliding sleeve 5. The compressed steel spring 3 lifts the sliding sleeve 5, and the limit pin pops out from the limit hole to release the limit state. Then, the load-bearing plate 2 is rotated out of the lifting groove to complete the disassembly of the sling.

[0030] The above is only a specific implementation method of this utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the utility model, according to the technical solution and new concept of the utility model, shall be covered by the protection scope of the utility model.

Claims

1. A precast floating slab anti - detachment sling, comprising a shaft and a lifting ring arranged at the top of the shaft, characterized in that, The sling further includes: A limit plate and a bearing plate, which have the same shape and size, are located at the lower part of the shaft and sleeved on the shaft. The limit plate and the bearing plate are each provided with at least one protruding part, and are respectively provided with limit holes that can be rotated by a set angle and then cooperate with each other; A sliding sleeve, which is sleeved on the shaft and located above the limit plate and the bearing plate. A plurality of limiters are provided on the circumferential side of the sliding sleeve; An elastic body, which is sleeved on the shaft and located between the sliding sleeve and the limit plate; An elastic buckle, which is installed on the shaft. When the sliding sleeve moves downward along the shaft to a set position, the elastic buckle automatically pops out and catches the sliding sleeve.

2. The prefabricated floating slab anti-disconnection sling according to claim 1, characterized in that, The limiter includes a limit pin and a connecting plate arranged parallel to the shaft. The limit pin is fixedly connected to the sliding sleeve through the connecting plate. The limit pin is in plug-in and unplugging cooperation with the limit hole. The limiter is used to penetrate the limit holes of the limit plate and the bearing plate at the same time to realize the movement limit of the limit plate and the bearing plate.

3. The precast floating slab anti-disengagement sling according to claim 1, characterized in that, The elastic buckle includes a convex block and an extension part. The extension part is an elastic body. One end of the extension part is connected to the shaft, and the other end is connected to the convex block. The extension part is arranged on the shaft and will not collide with the sliding sleeve for limiting. The convex block protrudes from the shaft. By pressing the convex block, the extension part deforms, and the convex block on the deformed extension part avoids the sliding sleeve.

4. The prefabricated floating slab anti-disengagement sling according to claim 1, wherein, It further includes a jacking sleeve. The jacking sleeve includes a columnar structure with a through hole in the middle and several clamping plates arranged in the columnar structure. The clamping plates are provided with holes that match the shapes of the limit plate and the bearing plate. There are gaps between the several clamping plates for accommodating the bearing plate.

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