Arch rib turning device

Abstract

The utility model relates to an arch rib turning-over device which is suitable for turning over arch rib sections and comprises a supporting pad and a turning-over fulcrum, and the supporting pad is supported on a first chord pipe of the arch rib sections. The turning-over supporting point is supported on the second chord pipe of the arch rib section, and the arch rib section in the suspended state is turned over and turned over by means of the turning-over supporting point. According to the utility model, the existing gantry crane in the field is matched with the arch rib turning device to turn over the arch rib sections, the arch rib sections are mainly lifted by the gantry crane, and the arch rib sections are turned over by 90 degrees by the aid of the arch rib turning device, so that the arch rib turning device ensures the safety and stability of the arch rib in the turning process, and the arch rib turning device can be used for turning over the arch rib sections. The turning-over speed of the arch rib is increased, and the investment of hoisting resources is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of arch rib assembly construction, and in particular relates to an arch rib turning device. Background Art

[0002] The bridge under construction is located between mountains and canyons. Due to its steep terrain and continuous crossing of the Dadong River and small rivers, it faces inconvenient transportation and difficult construction. In addition, due to limited transportation conditions at the bridge site, the main arch ribs can only be processed into short sections in the processing plant and then transported to the bridge site for on-site assembly.

[0003] However, the on-site steel structure assembly site is located at the long-distance roadbed of the bridge under construction, with limited space. In addition, the main arch rib is a variable-height truss structure, which makes it difficult to control the accuracy of vertical assembly. Therefore, the "2+1" horizontal assembly method is used for assembly on site. After assembly, the arch rib needs to be turned 90° for storage and transported to the lifting area for installation by a beam transporter. In the past, the arch rib was turned over by a gantry crane or a gantry crane combined with a truck crane, and the 90° flip of the arch rib was completed by four-point lifting, which required a lot of resources, relatively low safety, and a long time. Utility Model Content

[0004] The utility model aims to provide an arch rib turning device to overcome the above technical defects.

[0005] In order to solve the above technical problems, the utility model provides an arch rib turning device, which is suitable for turning over the arch rib segment, and includes:

[0006] a pad supported on the first chord of the arch rib segment;

[0007] The turning fulcrum is supported on the second chord of the arch rib segment, and the arch rib segment in a suspended state is turned over and oriented by relying on the turning fulcrum.

[0008] The turning fulcrum includes a slide rail;

[0009] A sliding assembly is provided on the track surface of the slide rail for sliding movement;

[0010] The second chord tube of the arch rib segment abuts against the supporting surface of the sliding assembly. During the turning over process, the second chord tube of the arch rib segment never leaves the supporting surface of the sliding assembly.

[0011] The sliding assembly at least comprises a sliding plate, which is slidably mounted on the track surface of the slide rail;

[0012] The sliding plate includes a first surface, the first surface contacts the second chord of the rib segment;

[0013] Two opposite edges of the first surface extend in the same direction so that the sliding plate is arranged across the track surface of the sliding rail.

[0014] The first surface is a plane or a curved surface;

[0015] When the first surface is a curved surface, the second chord of the rib segment is wrapped in the curved surface.

[0016] A wear-resistant rubber sheet is fixedly connected to the first surface of the sliding plate;

[0017] The second chord of the arch rib segment contacts the wear-resistant rubber sheet.

[0018] A support plate and a polytetrafluoroethylene plate are provided between the sliding plate and the track surface of the slide rail;

[0019] The sliding plate, the polytetrafluoroethylene plate and the supporting plate are arranged in sequence from top to bottom, wherein the polytetrafluoroethylene plate, the supporting plate and the track surface of the sliding rail are connected in sequence.

[0020] A hand chain hoist is provided on the track surface of the slide rail;

[0021] One end of the hand chain hoist is connected to the slide rail, and the other end is connected to the sliding assembly.

[0022] The utility model utilizes the existing gantry crane in the site and the arch rib turning device to realize the turning of the arch rib segment. The arch rib segment is mainly lifted by the gantry crane, and the arch rib segment completes a 90° turning operation with the help of the arch rib turning device. The arch rib turning device ensures the safety and stability of the arch rib during the turning process, speeds up the arch rib turning speed, and reduces the investment in lifting and hoisting resources.

[0023] In order to make the above contents of the present invention more clearly understood, preferred embodiments are given below and described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the application of the arch rib segment in conjunction with the arch rib turning device.

[0025] Figure 2 It is a structural schematic diagram of the arch rib turning device.

[0026] Figure 3 is a schematic diagram of the sliding assembly.

[0027] Figure 4 This is a schematic diagram of the position of the lifting lugs in the arch rib segment.

[0028] Description of reference numerals:

[0029] 10. Arch rib segment;

[0030] 20. Support pad;

[0031] 30. Turning fulcrum; 31. Slide rail; 32. Sliding assembly; 321. Sliding plate; 322. Wear-resistant rubber sheet; 323. Support plate; 324. Polytetrafluoroethylene plate;

[0032] 40.Hand chain hoist;

[0033] 50. Lifting lugs. DETAILED DESCRIPTION

[0034] The following is an explanation of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0035] It should be noted that, in the present utility model, the up, down, left and right in the figure are regarded as the up, down, left and right of the arch rib turning device described in this specification.

[0036] The exemplary embodiments of the present invention are now introduced with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0037] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0038] This embodiment relates to an arch rib turning device, which is suitable for turning over the arch rib segment 10. Figure 1 and Figure 2 The arch rib turning device includes a support pad 20 and a turning fulcrum 30, wherein the support pad 20 is supported on the first chord tube of the arch rib segment 10; the turning fulcrum 30 is supported on the second chord tube of the arch rib segment 10, and the arch rib segment 10 in a suspended state is turned over by relying on the turning fulcrum 30.

[0039] The structure of the arch rib segment 10 can be referred to Figure 1 It is a frame structure composed of string tubes. The support pad 20 and the turning fulcrum 30 are respectively arranged under the two string tubes. It should be noted here that the positions of the support pad 20 and the turning fulcrum 30 are determined according to the positions of the string tubes. They are not necessarily on the same horizontal line, but can be on the same plane.

[0040] The support pad 20 can be made of square wood.

[0041] See also Figure 2 The turning fulcrum 30 comprises a slide rail 31, and the slide rail 31 is formed by welding two I-beams.

[0042] A sliding assembly 32 is slidably provided on the track surface of the slide rail 31 , and the second chord tube of the arch rib segment 10 abuts against the support surface of the sliding assembly 32 . During the turning process, the second chord tube of the arch rib segment 10 never leaves the support surface of the sliding assembly 32 .

[0043] In order to facilitate the flip without causing a large dumping impact, Figure 4 As shown (the arch rib segment 10 has completed a 90° turn), a number of lugs 50 are reasonably arranged on the arch rib segment 10. The layout principle of the lugs 50 is: when the center of gravity of the arch rib segment 10 and the midpoint of the lug 50 are on the same plumb line, the midpoint of the lug 50 is close to but does not cross the plumb line.

[0044] A plurality of lifting ears 50 are provided on each rib segment 10. The specific positions can be combined with Figure 1 and Figure 4 , the lifting lug 50 is arranged at 30° to the outside, that is, Figure 4 shown.

[0045] Specifically, after the arch rib segment 10 is in place, Figure 1 As shown, the main hook of the gantry crane is moved to the lifting lug 50, and the hook is lowered. The gantry crane hook and the lifting lug 50 are connected with a wire rope. After the lifting lug 50 is connected, the hook is lifted and flipped. The two gantry cranes are started, and the hook and the lifting lug 50 are lifted synchronously and slowly at a uniform speed. After the first chord tube of the arch rib segment 10 leaves the ground, as the lifting lug 50 is lifted, the lifting lug 50 moves in the flipping direction until the center and center of gravity of the lifting lug 50 are on the same plumb line (critical state). After the arch rib segment 10 reaches the critical state, the lifting lug 50 is stopped. During the hook lifting and flipping process, the two gantry cranes operate synchronously, and the arch rib segment 10 is always "not separated" from the arch rib flipping device.

[0046] When the arch rib segment 10 reaches the critical state, the sliding assembly 32 is pulled to break the critical state, causing the arch rib segment 10 to flip over. The hooks of the two gantry cranes and the lifting ears 50 are operated to slowly descend synchronously to allow the arch rib segment 10 to continue to flip over. After flipping into place, the gantry cranes release the hooks and transport the arch rib segment 10 to the storage area.

[0047] The above critical state refers to the time when the arch rib segment 10 has a tendency to flip.

[0048] Please continue reading Figure 2 Combined with Figure 3 The sliding assembly 32 at least includes a sliding plate 321, which is slidably mounted on the track surface of the slide rail 31, and the sliding plate 321 includes a first surface, which contacts the second chord tube of the arch rib segment 10. That is, the second chord tube of the arch rib segment 10 is placed on the first surface of the sliding plate 321, and the sliding plate 321 drives the arch rib segment 10 to slide along the slide rail 31 to cooperate with the gantry crane to turn over the arch rib segment 10.

[0049] In order to ensure that the sliding plate 321 does not slide out of the slide rail 31 during sliding, in some embodiments, two opposite edges of the first surface of the sliding plate 321 extend in the same direction so that the sliding plate 321 straddles the track surface of the slide rail 31. That is, along the longitudinal cross section, the sliding plate 321 is in a U-shape with the opening facing downward. For details, please refer to Figure 3 .

[0050] In some embodiments, the first surface is a plane or a curved surface, and the second chord of the rib segment 10 is placed on the plane or the curved surface, so that the sliding plate 321 drives the rib segment 10 to slide synchronously through the plane or the curved surface.

[0051] When the first surface is a curved surface, the second chord of the rib segment 10 is wrapped in the curved surface, and the curved surface can prevent / avoid the rib segment 10 from sliding out.

[0052] In some embodiments, in order to prevent the chord tube of the arch rib segment 10 from being damaged due to excessive local pressure, a wear-resistant rubber sheet 322 is fixed to the first surface of the sliding plate 321, and the second chord tube of the arch rib segment 10 is placed on the wear-resistant rubber sheet 322 to improve the contact between the chord tube and the sliding plate 321.

[0053] That is, the second chord tube of the rib segment 10 contacts the wear-resistant rubber sheet 322 .

[0054] In some embodiments, a support plate 323 and a polytetrafluoroethylene plate 324 are provided between the sliding plate 321 and the track surface of the slide rail 31. Specifically:

[0055] The sliding plate 321 , the polytetrafluoroethylene plate 324 , and the support plate 323 are arranged in sequence from top to bottom, wherein the polytetrafluoroethylene plate 324 , the support plate 323 and the track surface of the slide rail 31 are connected in sequence.

[0056] In order to control the maximum horizontal force that may be generated by the lifting lug 50 when the movement is uncoordinated, such as Figure 3 As shown, a polytetrafluoroethylene plate 324 is provided on the lower surface of the sliding plate 321 as a sliding support pad; in order to improve the overall rigidity and stability of the slide rail 31, as shown Figure 3 As shown, a support plate 323 is provided on the upper surface of the slide rail 31 .

[0057] In some embodiments, in order to facilitate breaking the critical state, a hand chain hoist 40 is provided on the track surface of the slide rail 31 , one end of the hand chain hoist 40 is connected to the slide rail 31 , and the other end is connected to the sliding assembly 32 .

[0058] A lug plate may be provided on the rail surface of the slide rail 31 , and one end of the hand chain hoist 40 is connected to the lug plate.

[0059] When the arch rib segment 10 turns over 45° and is in a critical state, the lifting lug 50 is stopped, and the two gantry cranes work synchronously during the hook turning process. The arch rib segment 10 always "does not leave" the supporting surface of the slide rail 31, and then the sliding plate 321 is pulled in the opposite direction by the hand winch 40 to break the critical state and make the arch rib segment 10 tend to turn over.

[0060] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An arch rib turning device, suitable for turning over an arch rib segment (10), characterized in that: include: A support pad (20) supported on the first chord tube of the arch rib segment (10); The turning fulcrum (30) is supported on the second chord tube of the arch rib segment (10), and the arch rib segment (10) in a suspended state is turned over and oriented by relying on the turning fulcrum (30).

2. The rib turning device according to claim 1, characterized in that: The turning fulcrum (30) comprises a slide rail (31); A sliding assembly (32) is slidably provided on the track surface of the slide rail (31); The second chord tube of the arch rib segment (10) abuts against the supporting surface of the sliding component (32), and during the turning process, the second chord tube of the arch rib segment (10) never leaves the supporting surface of the sliding component (32).

3. The rib turning device according to claim 2, characterized in that: The sliding assembly (32) comprises at least a sliding plate (321), and the sliding plate (321) is slidably mounted on the track surface of the sliding rail (31); The sliding plate (321) comprises a first surface, wherein the first surface contacts the second chord tube of the rib segment (10); Two opposite edges of the first surface extend in the same direction so that the sliding plate (321) is arranged across the track surface of the sliding rail (31).

4. The arch rib turning device according to claim 3, characterized in that: The first surface is a plane or a curved surface; When the first surface is a curved surface, the second chord of the rib segment (10) is wrapped in the curved surface.

5. The arch rib turning device according to claim 3 or 4, characterized in that: A wear-resistant rubber sheet (322) is fixedly connected to the first surface of the sliding plate (321); The second chord tube of the rib segment (10) contacts the wear-resistant rubber sheet (322).

6. The arch rib turning device according to claim 3 or 4, characterized in that: A support plate (323) and a polytetrafluoroethylene plate (324) are provided between the sliding plate (321) and the track surface of the slide rail (31); The sliding plate (321), the polytetrafluoroethylene plate (324), and the support plate (323) are arranged in sequence from top to bottom, wherein the polytetrafluoroethylene plate (324), the support plate (323), and the track surfaces of the slide rail (31) are connected in sequence.

7. The rib turning device according to claim 2, characterized in that: A hand chain hoist (40) is provided on the track surface of the slide rail (31); One end of the hand chain hoist (40) is connected to the slide rail (31), and the other end is connected to the sliding assembly (32).

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