A box culvert hoisting mechanism

Abstract

The present invention discloses a box culvert hoisting mechanism, which includes a mechanism body capable of moving along the extension direction of a tunnel, and a hoisting assembly provided on the mechanism body. The hoisting assembly includes a bearing bracket for bearing the box culvert, which is rotatably connected to the mechanism body, limit members provided on the left and right sides of the bearing bracket, and pressing members provided on the bearing bracket corresponding to the limit members. The limit members can cooperate to penetrate into the box culvert from the lower opening of the box culvert and abut against the inner side wall of the box culvert. The pressing members can move along the direction close to the limit members and press the box culvert against the limit members, or move along the direction away from the limit members and disengage from the box culvert. In the box culvert hoisting mechanism of the present invention, one side wall of the box culvert is limited and clamped by the limit members and the pressing members, so that the box culvert can be fixed on the bearing bracket, avoiding the shaking of the box culvert during the hoisting process, ensuring the stability of the box culvert hoisting, improving the accuracy of subsequent installation, and eliminating potential safety hazards at the same time.

Description

Technical Field

[0001] The present invention relates to the field of installation of box culverts, and particularly relates to a box culvert hoisting mechanism. Background Art

[0002] The middle box culvert is an important internal component of an extra-large diameter road shield tunnel, and plays the role of providing a construction passage during the tunnel construction period and a carriageway foundation and functional partition during the operation period.

[0003] After the box culvert is manufactured, it needs to be hoisted by a crane and installed in the tunnel shaft. However, the current crane can only simply hoist the box culvert into the tunnel, and it is difficult to ensure the stability of the box culvert during the hoisting process by the crane. On the one hand, this will affect the accuracy of the subsequent installation of the box culvert, and on the other hand, it also poses a great safety hazard. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a box culvert hoisting mechanism that can effectively limit the box culvert and ensure the stability of the box culvert during hoisting.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A box culvert hoisting mechanism is used for hoisting a box culvert and installing the box culvert in a tunnel. The box culvert is a hollow structure with upper and lower openings. The hoisting mechanism includes a mechanism body that can move along the extension direction of the tunnel, and a lifting assembly provided on the mechanism body. The lifting assembly includes a bearing bracket that is rotatably connected to the mechanism body and is used for carrying the box culvert, and limiting members provided on the left and right sides of the bearing bracket. The limiting members can cooperatively penetrate into the box culvert from the lower opening of the box culvert and abut against the inner side wall of the box culvert. The lifting assembly further includes a pressing member provided on the bearing bracket and corresponding to the limiting members. The pressing member can move along a direction close to the limiting members and press the box culvert against the limiting members, or move along a direction away from the limiting members and disengage from the box culvert.

[0007] Preferably, the bearing bracket includes a U-shaped bracket body and a plurality of supporting portions provided on the inner peripheral side of the bracket body. The box culvert can be cooperatively carried on the plurality of supporting portions.

[0008] More preferably, the two limiting members are located on two of the supporting portions at one end of the bracket body close to the mechanism body.

[0009] Further preferably, the limiting member includes a first limiting rod and a second limiting rod connected to the end of the first limiting rod and extending along a direction perpendicular to the length of the first limiting rod. The first limiting rod can be inserted into the culvert in a matching manner, and the second limiting rod can be abutted against the inner side wall of the culvert in a matching manner.

[0010] Preferably, one end of the second limiting rod close to the culvert has an abutting surface matching the inner side wall of the culvert.

[0011] Preferably, the pressing member is a hydraulic jack, and the piston rod of the hydraulic jack can move along a direction close to or away from the limiting member.

[0012] Preferably, the hoisting mechanism further includes a plurality of lifting members that can respectively drive the ends of the bearing bracket to lift in a matching manner. The lifting member includes a driving member provided on the mechanism body, a pulley provided on the bearing bracket that can rotate around its own axis and can rotate around the end of the bearing bracket, and a driving cable connected between the driving member and the pulley.

[0013] Further preferably, the hoisting mechanism further includes limiting sensors corresponding to the lifting members and respectively located below each pulley.

[0014] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: The culvert hoisting mechanism of the present invention limits and clamps one side wall of the culvert through the limiting member and the pressing member, so that the culvert can be fixed on the bearing bracket, avoiding the shaking of the culvert during hoisting, ensuring the stability of culvert hoisting, improving the accuracy of subsequent installation and eliminating potential safety hazards at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Att Figure 1 is a top view schematic diagram of the culvert hoisting mechanism in a specific embodiment of the present invention;

[0016] Att Figure 2 is a front view schematic diagram of the culvert hoisting mechanism in a specific embodiment of the present invention.

[0017] Wherein: 1. Bearing bracket; 11. Bracket body; 12. Support part; 2. Limiting member; 21. First limiting rod; 22. Second limiting rod; 3. Pressing member; 4. Lifting member; 41. Pulley; 42. Driving cable; 5. Limiting sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions of the present invention will be further described below with reference to the accompanying drawings.

[0019] The present invention relates to an improvement of a box culvert crane, which is used for hoisting box culverts and installing them in a tunnel. The improved box culvert hoisting mechanism can well fix the box culvert on the bearing bracket, avoid the shaking of the box culvert during hoisting, ensure the stability of box culvert hoisting, improve the accuracy of subsequent installation and eliminate potential safety hazards at the same time.

[0020] Specifically, a box culvert hoisting mechanism in this embodiment includes a mechanism body (not shown in the figure) that can move along the extension direction of the tunnel, and a hoisting component provided on the mechanism body. Here, the mechanism body is a trolley that can move along the tunnel, and is used to drive the hoisting component to move along the tunnel and install box culverts in sequence.

[0021] See Figure 1-2 As shown, the hoisting component includes a bearing bracket 1 that is flip-connectable to the mechanism body and is used to carry the box culvert, and limit members 2 provided on the left and right sides of the bearing bracket 1. The box culvert is a hollow structure with upper and lower openings. Before hoisting, the box culvert is placed on a transport vehicle, and its width is greater than the width of the vehicle. During hoisting, the limit members 2 can cooperatively penetrate into the lower opening of the box culvert from both lower sides of the transport vehicle and abut against the inner side wall of the box culvert. Through the arrangement of the limit members 2, the side walls of the box culvert can be well limited, avoiding the shaking of the box culvert.

[0022] Furthermore, the above hoisting component further includes a pressing member 3 provided on the bearing bracket 1 and corresponding to the limit member 2. The pressing member 3 can move along the direction close to the limit member 2 and press the box culvert against the limit member 2, or move along the direction away from the limit member 2 and disengage from the box culvert. Here, the pressing member 3 is a hydraulic jack, and the piston rod of the hydraulic jack can move along the direction close to or away from the limit member 2. By pressing the side wall of the box culvert against the limit member 2 with the pressing member 3, the limiting effect is further ensured, so that the box culvert can be firmly fixed on the bearing bracket 1.

[0023] In this embodiment, the bearing bracket 1 includes a U-shaped bracket body 11 and a plurality of supporting portions 12 provided on the inner peripheral side of the bracket body 11. The box culvert can be cooperatively carried on the plurality of supporting portions 12. And the two limit members 2 are located on two supporting portions 12 at one end of the bracket body 11 close to the mechanism body. Here, there are four supporting portions 12, and they are respectively located at the four ends of the bracket body 11. During hoisting, each end of the box culvert is respectively placed on the four supporting portions 12, and the limit member 2 is located on the side where the two supporting portions 12 close to the mechanism body are close to each other, and can cooperatively penetrate into the lower opening of the box culvert to achieve limiting.

[0024] Specifically, the limiting member 2 includes a first limiting rod 21 and a second limiting rod 22 connected to the end of the first limiting rod 21 and extending along the direction perpendicular to the length of the first limiting rod 21. The first limiting rod 21 can be inserted into the culvert in a matching manner, and the second limiting rod 22 can be abutted against the inner side wall of the culvert in a matching manner. One end of the second limiting rod 22 close to the culvert has an abutting surface matching the inner side wall of the culvert. Here, since chamfers are provided at both ends of the inner side wall of the culvert, the abutting surface is an inclined surface matching the chamfer.

[0025] The above-mentioned hoisting mechanism further includes a plurality of lifting members 4 that can respectively cooperate to drive the lifting of each end of the bearing bracket 1. The lifting member 4 includes a driving member (not shown in the figure) provided on the mechanism body, a pulley 41 provided on the bearing bracket 1 that can rotate around its own axis and can rotate around the end of the bearing bracket, and a driving cable 42 connected between the driving member and the pulley 41. The driving cable 42 here is a steel cable, and the driving member includes a steel cable drum for winding the steel cable and a motor for driving the rotation of the steel cable drum. By driving the rotation of the steel cable drum by the motor, the steel cable drum drives the pulley to lift by winding and unwinding the steel cable, so as to realize the winch lifting of the end of the bearing bracket 1.

[0026] In this embodiment, the above-mentioned plurality of lifting members 4 can operate independently and synchronously cooperate with each other. During operation, only the corresponding motor needs to be turned on according to needs. Each lifting member 4 can be independently controlled, which improves the flexibility of the culvert lifting and achieves the purpose of flexibly adjusting the posture of the culvert.

[0027] The above-mentioned hoisting mechanism further includes limit sensors 5 provided corresponding to the lifting members 4 and respectively located below each pulley 41. The limit sensors 5 are infrared sensors. Since the culvert needs to be flipped during installation, the heights of the front and rear ends of the bearing bracket 1 will be inconsistent during lifting. At this time, the pulley 41 needs to rotate around the end of the bearing bracket 1 accordingly to achieve flipping. The limit sensor 5 is used to limit the excessive flipping of the pulley 41, so that the culvert can operate within the designed angle range during the flipping process, and prevent the center of gravity from being unstable due to excessive flipping angle. Specifically, when the pulley 41 flips excessively and reaches the limit sensor 5, the limit sensor 5 senses the pulley 41 and emits an alarm signal, and the controller can control the motor to stop driving. The controller here is a conventional control system.

[0028] The working process of this embodiment is specifically described below: When the work starts, the mechanism body moves to the side of the culvert. At this time, the bearing bracket 1 supports the culvert, the limiting member 2 penetrates into the lower opening of the culvert and abuts against the inner side wall of the culvert. Subsequently, the pressing member 3 operates and presses the culvert. Finally, the lifting members 4 at each end of the bearing bracket 1 cooperate with each other to achieve the lifting and flipping of the culvert, and the installation of the culvert is completed.

[0029] The above embodiments are only used to illustrate the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A box culvert hoisting mechanism is used for hoisting a box culvert and installing the box culvert in a tunnel. The box culvert is a hollow structure with openings at the upper and lower ends. The hoisting mechanism includes a mechanism body that can move along the extension direction of the tunnel and a hoisting assembly provided on the mechanism body, and is characterized in that: The lifting assembly includes a load-bearing bracket (1) that is reversibly connected to the mechanism body for carrying the culvert, and limit members (2) provided on the left and right sides of the load-bearing bracket (1). The limit members (2) can cooperate to penetrate into the culvert from the lower end opening of the culvert and abut against the inner side wall of the culvert. The lifting assembly further includes a pressing member (3) provided on the load-bearing bracket (1) and corresponding to the limit members (2). The pressing member (3) can move along the direction close to the limit members (2) to press the culvert against the limit members (2), or move along the direction away from the limit members (2) and disengage from the culvert. The limit member (2) includes a first limit rod (21) and a second limit rod (22) connected to the end of the first limit rod (21) and extending along the length direction perpendicular to the first limit rod (21). The first limit rod (21) can cooperate to penetrate into the culvert, and the second limit rod (22) can cooperate to abut against the inner side wall of the culvert. One end of the second limit rod (22) close to the culvert has an abutting surface matching the inner side wall of the culvert; chamfers are provided at both ends of the inner side wall of the culvert, and the abutting surface is an inclined surface matching the chamfers. The hoisting mechanism further includes a plurality of lifting members (4) that can respectively cooperate to drive the lifting of each end of the load-bearing bracket (1). The lifting member (4) includes a driving member provided on the mechanism body, a pulley (41) provided on the load-bearing bracket (1) that can rotate around its own axis and can rotate around the end of the load-bearing bracket, and a driving cable (42) connecting the driving member and the pulley (41). The plurality of lifting members (4) can operate independently and cooperate with each other for synchronous operation.

2. The box culvert hoisting mechanism according to claim 1, characterized in that: The load-bearing bracket (1) includes a U-shaped bracket body (11) and a plurality of support portions (12) provided on the inner peripheral side of the bracket body (11). The culvert can be carried on the plurality of support portions (12) in a cooperative manner.

3. The box culvert hoisting mechanism according to claim 2, characterized in that: The two limit members (2) are respectively located on two of the support portions (12) at one end of the bracket body (11) close to the mechanism body.

4. The box culvert hoisting mechanism according to claim 1, characterized in that: The pressing member (3) is a hydraulic jack, and the piston rod of the hydraulic jack can move along the direction close to or away from the limit member (2).

5. A box culvert hoisting mechanism according to claim 1, characterized in that: The hoisting mechanism further includes limit sensors (5) provided corresponding to the lifting members (4) and respectively located below each of the pulleys (41).

Images