A vertical lifting device for segments

Abstract

The utility model discloses a vertical lifting appliance for segment, the other end of first pull plate is hinged with first clamping plate through first pivot, the other end of second pull plate is hinged with second clamping plate through second pivot, and first clamping plate and second clamping plate are hinged through hinged axle, and the other end of two first clamping plates is provided with first clamping arm, and the other end of two second clamping plates is provided with second clamping arm, and the inside of first clamping arm and second clamping arm is fixedly installed with clamping plate, and the inside wall of clamping plate is detachably installed with friction plate, and the gap is formed between two clamping plates of the same side. The shear linkage structure makes the clamping force be proportional to the segment weight, and the cooperation friction plate can effectively prevent the skidding, and the gap is formed between two clamping plates of the same side, and when the segment is clamped by the vertical lifting appliance, then four clamping plates clamp the two side surfaces of the segment, thereby the adhesion rate of the friction plate and the segment side surface is improved as a whole, and the reliability of the segment hoisting is improved, and the safety of the segment hoisting is improved.

Description

Technical Field

[0001] This utility model relates to the hoisting of tunnel segments, and in particular to a vertical hoisting device for tunnel segments. Background Technology

[0002] In the field of construction engineering technology, especially in urban rail transit construction, shield tunneling has become the main construction method for tunnels. The main structure of the tunnel is mainly assembled from prefabricated segments. Currently, the segments are mainly prefabricated in the segment factory and then transported to the construction site for assembly. Although prefabricating segments in the segment factory can significantly shorten the construction period, the prefabricated segments are large in size and weight. After prefabrication, the segments need to be adjusted in position or lifted to complete the entire segment construction position using hoisting fixtures, resulting in frequent hoisting and turnover processes.

[0003] Our inventors have conducted research and proposed a locking lifting device (CN205998865U) for hoisting subway tunnel segments, including a lifting device for connecting to a power unit; the lifting device is hinged with a tension part, the tension part including two pull rods that can retract in opposite directions under the action of gravity when the lifting device rises, the two pull rods are respectively connected to a main clamping arm and a secondary clamping arm, so that when the two pull rods retract in opposite directions, the main clamping arm and the secondary clamping arm are tightened and the subway tunnel segment is hoisted. The aforementioned locking lifting device utilizes the gravity of two pull rods to retract them in opposite directions. By applying an upward force to the pull rods, gravity causes them to automatically retract, thus clamping the subway tunnel segments. However, during long-term use, the inventors discovered uneven stress on the friction plates, leading to more severe wear in some areas and less wear in others. In other words, during lifting, the locking lifting device concentrates stress in a specific area of ​​the friction plates, resulting in severe wear while other areas experience less friction. The lifting of tunnel segments is affected. If a segment falls during the lifting process, it will cause incalculable safety hazards. Therefore, after long-term research, the inventors found that the two outer sides of the tunnel segment have a certain wedge angle, and it is impossible to guarantee that the two side walls are completely flat after prefabrication. This results in poor adhesion between the friction plate and the tunnel segment, leading to stress concentration on the friction plate and severe wear in some areas. Moreover, in existing lifting tools, the clamping plate and the friction plate are a whole. When the friction plate is in contact with the side wall, it is difficult to guarantee the adhesion rate between the friction plate and the side wall, which affects the lifting effect and the service life of the friction plate. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a vertical lifting device for tunnel segments.

[0005] The purpose of this utility model is achieved through the following technical solution: A vertical lifting device for tunnel segments includes a pin and a hook. The hook is mounted on the pin. A first pull plate and a second pull plate are rotatably mounted on both ends of the pin. A first clamping plate is hinged to the other end of the first pull plate through a first rotating shaft. A second clamping plate is hinged to the other end of the second pull plate through a second rotating shaft. The first clamping plate and the second clamping plate are hinged together by a hinge shaft. A first clamping arm is provided at the other end of the two first clamping plates. A second clamping arm is provided at the other end of the two second clamping plates. A clamping plate is fixedly mounted on the inner side of both the first clamping arm and the second clamping arm. A friction plate is detachably mounted on the inner side wall of the clamping plate. There is a gap between the two clamping plates on the same side.

[0006] Optionally, a locking hook is installed on the inner side of the first clamping plate. The locking hook rotates around the hinge shaft. When the hook pulls the first clamping plate upward, the locking hook approaches the pin shaft, and the hook part of the locking hook can be hooked on the pin shaft. When the hook pushes the first clamping plate downward, the locking hook moves away from the pin shaft.

[0007] Optionally, a stop bar is also installed on the inner side of the first clamping plate. The stop bar rotates around the hinge shaft. When the hook pulls the first clamping plate upward, the hook of the stop bar moves away from the second rotating shaft. When the hook pushes the first clamping plate downward, the hook of the stop bar moves closer to the second rotating shaft. After the friction plate clamps the segment, there is a gap between the hook of the stop bar and the second rotating shaft.

[0008] Optionally, limit sleeves are fitted on the pin, the first rotating shaft, the second rotating shaft, and the hinge shaft.

[0009] Optionally, reinforcing plates are provided on the outer side of the connection between the second clamping plate and the first clamping arm, as well as on the outer side of the connection between the first clamping plate and the second clamping arm.

[0010] Optionally, the friction plate and the clamping plate are locked together by countersunk bolts.

[0011] Optionally, the outer side of the clamping plate is also provided with several reinforcing ribs laterally.

[0012] This utility model has the following advantages: The vertical lifting device of this utility model has a scissor linkage structure that makes the clamping force proportional to the weight of the pipe segment. Combined with the friction plate, it can effectively prevent slippage. Moreover, there is a gap between the two clamping plates on the same side. When the pipe segment is clamped by the vertical lifting device, there are four clamping plates that clamp the two sides of the pipe segment, thereby improving the overall contact rate between the friction plate and the side of the pipe segment, thus improving the reliability and safety of the pipe segment lifting. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure where the locking hook is attached to the pin. Figure 2 A schematic diagram of the structure of the lifting device clamping the tunnel lining segments; Figure 3 This is a schematic diagram of the structure of this utility model; Figure 4 This is a partial schematic diagram of a vertical lifting device gripping a tunnel segment; In the diagram, 1-hook, 2-pin, 3-first pull plate, 4-first rotating shaft, 5-first clamping plate, 6-second pull plate, 7-second rotating shaft, 8-hinge shaft, 9-second clamping plate, 10-first clamping arm, 11-second clamping arm, 12-clamping plate, 13-locking hook, 14-stop bar, 15-friction plate, 16-reinforcing plate, 17-limiting sleeve, 18-gap, 19-locking screw. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0016] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0017] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, a vertical lifting device for tunnel segments includes a pin 2 and a hook 1. The hook 1 is mounted on the pin 2 and has a U-shaped structure. A through hole is provided on the U-shaped arm of the hook 1, and the pin 2 passes through the through hole. A first pull plate 3 and a second pull plate 6 are rotatably mounted on both ends of the pin 2. Furthermore, the second pull plate 6 is located inside the first pull plate 3, and the U-shaped arm of the hook 1 is located inside the corresponding second pull plate 6. The other end of the first pull plate 3 is hinged to a first clamping plate 5 via a first rotating shaft 4, and the other end of the second pull plate 6 is connected to a first clamping plate 5 via a first rotating shaft 4. The second rotating shaft 7 is hinged to a second clamping plate 9. The first clamping plate 5 and the second clamping plate 9 are hinged together by a hinge shaft 8. A first clamping arm 10 is provided at the other end of each of the two first clamping plates 5, and a second clamping arm 11 is provided at the other end of each of the two second clamping plates 9. Furthermore, the first clamping arm 10 and the first clamping plate 5 have an angle, and the second clamping arm 11 and the second clamping plate 9 have an angle. When the first clamping plate 5 and / or the second clamping plate 9 rotate relative to the hinge shaft 8, the relative positions of the first clamping arm 10 and the second clamping arm 11 change. In this embodiment, for example... Figure 3 and Figure 4As shown, clamping plates 12 are fixedly installed on the inner sides of the first clamping arm 10 and the second clamping arm 11. Friction plates 15 are detachably installed on the inner side wall of the clamping plate 12. There is a gap 18 between the two clamping plates 12 on the same side. Therefore, when the segment is clamped by the vertical lifting device, four clamping plates 12 clamp the two sides of the segment, thereby improving the overall contact rate between the friction plates 15 and the side of the segment, thus improving the reliability and safety of segment lifting.

[0021] In this embodiment, as Figure 1 and Figure 2 As shown, a locking hook 13 is installed on the inner side of the first clamping plate 5. The locking hook 13 rotates around the hinge shaft 8. When the hook 1 pulls the first pull plate 3 upward, the locking hook 13 approaches the pin shaft 2, and the hook of the locking hook 13 can be hooked on the pin shaft 2. When the hook 1 pushes the first pull plate 3 downward, the locking hook 13 moves away from the pin shaft 2. In this embodiment, when the hook 1 moves upward, the locking hook 13 moves away from the pin shaft 2, thereby making the first pull plate 3, the second pull plate 6, the first clamping plate 5, and the second clamping plate 9 in an active state. After the first clamping arm 10 and the second clamping arm 11 clamp the segment, during the hoisting process... Under the weight of the tunnel segment, the first clamping plate 5 and the second clamping plate 9 are subjected to a downward pulling force, which in turn causes the first clamping arm 10 and the second clamping arm 11 to move closer to each other, thereby ensuring the reliability of the clamping of the tunnel segment by the first clamping arm 10 and the second clamping arm 11. When the locking hook 13 is hooked on the pin 2, the relative positions of the first pull plate 3, the second pull plate 6, the first clamping plate 5 and the second clamping plate 9 are locked. At this time, the first clamping arm 10 and the second clamping arm 11 are in a figure-eight shape, which makes it easier for the clamping area of ​​the tunnel segment to enter between the first clamping arm 10 and the second clamping arm 11.

[0022] In this embodiment, as Figure 1 and Figure 2 As shown, a stop bar 14 is also installed on the inner side of the first clamping plate 5. The stop bar 14 rotates around the hinge shaft 8. When the hook 1 pulls the first pull plate 3 upward, the hook of the stop bar 14 moves away from the second rotating shaft 7. When the hook 1 pushes the first pull plate 3 downward, the hook of the stop bar 14 moves closer to the second rotating shaft 7. After the friction plate 15 clamps the tube segment, there is a gap between the hook of the stop bar 14 and the second rotating shaft 7. In this embodiment, the thickness of the tube segment is standard. Therefore, the gap between the two friction plates 15 after clamping the tube segment is also relatively fixed. Therefore, by observing the gap between the stop bar 14 and the second rotating shaft 7, the wear degree of the friction plate 15 can be determined. When the gap between the hook of the stop bar 14 and the second rotating shaft 7 approaches the set value, it indicates that the friction plate 15 is severely worn and needs to be replaced with a new friction plate 15.

[0023] In this embodiment, as Figure 3As shown, a limiting sleeve 17 is fitted on the pin 2, the first rotating shaft 4, the second rotating shaft 7, and the hinge shaft 8. The limiting sleeve 17 can prevent the first pull plate 3, the second pull plate 6, the first clamping plate 5, and the second clamping plate 9 from moving axially.

[0024] In this embodiment, as Figure 3 and Figure 4 As shown, reinforcing plates 16 are provided on the outer side of the connection between the second clamping plate 9 and the first clamping arm 10, and on the outer side of the connection between the first clamping plate 5 and the second clamping arm 11, so as to ensure the structural strength of the lifting device and improve the reliability of segment lifting.

[0025] In this embodiment, as Figure 3 As shown, the friction plate 15 is locked to the clamping plate 12 by countersunk bolts, which makes it easy to disassemble and assemble the friction plate 15.

[0026] In this embodiment, as Figure 4 As shown, several reinforcing ribs are also provided laterally on the outer side of the clamping plate 12. The reinforcing ribs can further improve the structural strength of the clamping plate 12, thereby ensuring the reliability of segment hoisting.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vertical lifting device for tunnel segments, comprising a pin and a hook, the hook being mounted on the pin, a first pull plate and a second pull plate being rotatably mounted at both ends of the pin, a first clamping plate being hinged to the other end of the first pull plate via a first pivot, and a second clamping plate being hinged to the other end of the second pull plate via a second pivot, the first clamping plate and the second clamping plate being hinged together via a hinge shaft, a first clamping arm being provided at the other end of the two first clamping plates, and a second clamping arm being provided at the other end of the two second clamping plates, characterized in that: A clamping plate is fixedly installed on the inner side of both the first clamping arm and the second clamping arm. A friction plate is detachably installed on the inner side wall of the clamping plate, and there is a gap between the two clamping plates on the same side.

2. The vertical lifting device for tunnel segments according to claim 1, characterized in that: A locking hook is installed on the inner side of the first clamping plate. The locking hook rotates around the hinge shaft. When the hook pulls the first pull plate upward, the locking hook approaches the pin shaft, and the hook part of the locking hook can be hooked on the pin shaft. When the hook pushes the first pull plate downward, the locking hook moves away from the pin shaft.

3. A vertical lifting device for tunnel segments according to claim 2, characterized in that: A stop bar is also installed on the inner side of the first clamping plate. The stop bar rotates around the hinge shaft. When the hook pulls the first pulling plate upward, the hook of the stop bar moves away from the second rotating shaft. When the hook pushes the first pulling plate downward, the hook of the stop bar moves closer to the second rotating shaft. When the friction plate clamps the tube segment, there is a gap between the hook of the stop bar and the second rotating shaft.

4. A vertical lifting device for tunnel segments according to any one of claims 1 to 3, characterized in that: Limiting sleeves are fitted on the pin, the first rotating shaft, the second rotating shaft, and the hinge shaft.

5. A vertical lifting device for tunnel segments according to any one of claims 1 to 3, characterized in that: A reinforcing plate is provided on the outer side of the connection between the second clamping plate and the first clamping arm, as well as on the outer side of the connection between the first clamping plate and the second clamping arm.

6. A vertical lifting device for tunnel segments according to any one of claims 1 to 3, characterized in that: The friction plate and the clamping plate are locked together by countersunk bolts.

7. A vertical lifting device for tunnel segments according to claim 5, characterized in that: The clamping plate is also provided with several reinforcing ribs on its outer side.

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