Tunnel construction trestle capable of crossing obstacles and obstacle crossing method of tunnel construction trestle

Abstract

The invention relates to a tunnel construction trestle capable of crossing obstacles and an obstacle crossing method thereof.The tunnel construction trestle comprises a trestle body, a moving trolley is connected to the trestle body, front jacking mechanisms are arranged on the two sides of the front end of the trestle body, and rear jacking mechanisms and walking rollers are arranged on the two sides of the rear end of the trestle body; supporting legs capable of ascending and descending are arranged on the two sides of the moving trolley respectively, and a driving mechanism for driving the moving trolley and the trestle body to move mutually is connected between the moving trolley and the trestle body. Acting force is applied to one end of the trestle main body through engineering machinery, so that the gravity center of the trestle main body is kept balanced on the moving trolley, and the driving mechanism drives the trestle main body to walk on the trolley and drives the walking rollers to cross obstacles.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction equipment, and in particular to a tunnel construction trestle capable of crossing obstacles and a method for crossing obstacles. Background Art

[0002] The tunnel inverted arch trestle is a device to solve the problem of vehicle interference between the inverted arch construction and the face construction, which can speed up the construction progress. In the prior art, when the trestle is moved, the running wheels set at one end of the trestle are generally driven to move, and the main bridge is driven to move. However, in use, the running wheels of the trestle often need to cross obstacles such as gullies in a small range according to actual conditions, or need to move on the working surface without the support of the trestle running wheels according to actual construction needs. At this time, the trestle needs to be moved, but the running wheels of the trestle cannot contact the supporting surface to walk. Therefore, the existing trestle moving mechanism cannot meet the needs of crossing obstacles or moving on the working surface without passage, and has great limitations in use. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a tunnel construction trestle capable of crossing obstacles and a method for crossing obstacles.

[0004] To achieve the above object, the present invention adopts the following technical solutions: A tunnel construction trestle capable of crossing obstacles comprises a trestle body, a moving trolley is connected to the trestle body, front jacking mechanisms are arranged on both sides of the front end of the trestle body, rear jacking mechanisms and walking rollers are arranged on both sides of the rear end of the trestle body, support legs capable of being raised and lowered are arranged on both sides of the moving trolley, and a driving mechanism for driving the moving trolley and the trestle body to move relative to each other is connected; when the driving mechanism is working, the supporting legs of the moving trolley touch the ground to support the trestle body, an external force is applied to one end of the trestle body, so that the trestle body keeps its center of gravity balanced on the moving trolley, and the driving mechanism drives the trestle body to walk on the trolley and drives the walking rollers off the ground to cross obstacles.

[0005] Furthermore, the applied external force is that the engineering machinery applies pressure on the side of the trestle main body with a short force arm taking the moving trolley as a fulcrum, or pulls on the side of the trestle main body with a long force arm.

[0006] Furthermore, at least one side of the mobile trolley is provided with a guide groove for guiding concrete; the mobile trolley is provided with an adjustment mechanism for adjusting the diversion direction of the guide groove; the adjustment mechanism includes a support frame, a central support rod, a pitch cylinder and a swing cylinder, the support frame is fixed to the side of the mobile trolley, the central support rod is rotatably sleeved on the sleeve of the support frame, the inclined frame at the upper end of the central support rod is hinged to the middle part of the bottom surface of the guide groove; the lower end of the pitch cylinder is hinged to the lower end of the central support rod, and the upper end of the pitch cylinder is hinged to the lower end or upper end of the bottom surface of the guide groove, so as to drive the pitch of the guide groove; the two ends of the swing cylinder are respectively hinged to the support ears of the support frame and the central support rod, so as to drive the guide groove to swing in the horizontal plane.

[0007] Furthermore, a movable foot is rotatably connected to the bottom of the supporting leg.

[0008] Furthermore, the trestle body includes box beams located on both sides and a cross beam located between the two box beams, and panels are laid on the cross beams.

[0009] Furthermore, the driving mechanism includes a hydraulic motor fixed on the moving trolley, a driving gear is fixed to the output end of the hydraulic motor, and a rack is fixed on the trestle body along the length direction, and the rack is meshed with the driving gear.

[0010] Furthermore, the rack is fixed on the inner side of the box girder on the side of the trestle body.

[0011] Furthermore, upper hanging wheels and lower tug wheels cooperating with the trestle body are respectively provided on both sides of the mobile trolley, the upper hanging wheels are roller-connected to the guide rails above the trestle body, and the lower tug wheels are roller-connected to the guide rails below the trestle body.

[0012] Furthermore, the front end of the trestle body is rotatably connected to a front approach bridge, which is driven to flip by a front flip cylinder; the rear end of the trestle body is rotatably connected to a rear approach bridge, which is driven to flip by a rear flip cylinder.

[0013] The present invention provides a method for crossing obstacles of a tunnel construction trestle that can cross obstacles. The method is used for the walking rollers of the trestle to cross obstacles. The supporting legs of a mobile trolley are supported on a supporting surface, and the trolley drives the main body of the trestle to move forward. During the process of the main body of the trestle moving forward, an engineering machine applies a force to one end of the main body of the trestle, so that the main body of the trestle maintains a balanced center of gravity during the process of moving forward. At this time, the walking rollers of the main body of the trestle leave the supporting surface, and the main body of the trestle moves forward to drive the walking rollers to cross obstacles. Among them, the method of applying pressure on the side of the main body of the trestle with a short lever arm by the engineering machine or the method of pulling on the side of the main body of the trestle with a long lever arm can be used to achieve the balance of the center of gravity of the main body of the trestle.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects: 1. The present invention can realize the crossing of small obstacles by the walking rollers of the trestle on the basis of having the basic functions of the existing trestle. When crossing obstacles, the engineering machinery (hook machine) applies pressure to the trestle according to the movement of the trestle, so that the center of gravity of the trestle is always balanced during the movement, and the trestle does not lose balance and collapse. During the movement, the trestle is completely supported by the moving trolley, and the hook machine dynamically assists the center of gravity balance during the movement. At this time, the walking rollers of the trestle are completely off the ground, creating conditions for the walking rollers to cross obstacles such as small gullies. At the same time, the crossing operation can be repeated, thereby achieving the requirement of moving the trestle on the working surface that does not have the conditions for passage; 2. A concrete diversion trough is set on the mobile trolley so that the mobile trolley has the function of diverting concrete, thereby reducing the number of construction equipment in the tunnel, the construction space inside the tunnel will not be affected, and the invert construction will be more convenient; in addition, the diversion direction of the diversion trough can be adjusted by an adjustment mechanism, which is more flexible to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural diagram of the mobile car; Figure 3 is a cross-sectional view of the driving mechanism; Figure 4 A simplified schematic diagram of the driving mechanism; Figure 5 It is a schematic diagram of the cross-domain barrier of the present invention. DETAILED DESCRIPTION

[0016] like Figure 1-3 As shown, a tunnel construction trestle capable of crossing obstacles of the present invention comprises a trestle body 1. In this embodiment, the overall length of the trestle body 1 exceeds 27 meters and is less than 30 meters. The span of the trestle body 1 exceeds 24 meters. The trestle body 1 comprises box girders located on both sides and a crossbeam located between the two box girders, and a panel is laid on the crossbeam. In this embodiment, each side of the trestle body 1 is composed of three sections of box girders connected by bolts. The skeleton of the trestle body 1 is assembled by box girders and crossbeams, which is not only convenient for transportation and on-site assembly, but also can ensure the stability of the trestle body 1.

[0017] A moving trolley 2 is connected to the trestle body 1. Front jacking mechanisms 3 are provided on both sides of the front end of the trestle body 1. Rear jacking mechanisms 4 and walking rollers 5 are provided on both sides of the rear end of the trestle body 1. Support legs 21 that can be raised and lowered are provided on both sides of the moving trolley 2. The bottom of the support legs 21 is rotatably connected to movable feet 22. The movable feet 22 have adaptive adjustment capabilities, so that they can adapt to different support surfaces.

[0018] A driving mechanism for driving the mutual movement is connected between the moving trolley 2 and the trestle body 1. The driving mechanism has two and is symmetrically arranged on both sides. Further, the driving mechanism includes a hydraulic motor 6 fixed on the moving trolley 2, and a driving gear 7 is fixed to the output end of the hydraulic motor 6. A rack 14 is fixed to the trestle body 1 along the length direction, and the rack 14 is fixed to the inner side of the box beam of the side part of the trestle body 1. The rack 14 is meshed with the driving gear 7.

[0019] The upper hanging wheel 25 and the lower tug wheel 26 that match the trestle body 1 are respectively provided on both sides of the mobile trolley 2. The upper hanging wheel 25 is pressed and connected to the guide rail 12 above the trestle body 1, and the lower tug wheel 26 is rolled and connected to the guide rail 13 below the trestle body 1. Through the cooperation of the upper hanging wheel 25 and the lower tug wheel 26, the mobile trolley 2 forms an upper and lower clamping guide mode on the trestle, which has extremely high stability. In addition, the gap between the gear and the rack 14 can be guaranteed to prevent the gear from climbing.

[0020] When the front lifting mechanism 3 and the rear lifting mechanism 4 of the trestle body 1 are supported on the supporting surfaces respectively, the driving mechanism drives the moving trolley 2 to move along the trestle body 1 .

[0021] like Figure 5 As shown, when the walking roller 5 of the trestle main body 1 needs to cross an obstacle 10, such as a small gully, the mobile trolley 2 moves to the end of the trestle main body 1 close to the walking roller 5, and then the bucket of the engineering machinery 11 (such as a hook machine) presses the end of the trestle main body 1 close to the walking roller 5, and then the four supporting legs 21 on both sides of the front and rear ends of the mobile trolley 2 are lowered and lifted up. At this time, the rear jacking mechanism 4 and the walking roller 5 of the trestle main body bridge 1 slightly leave the supporting surface, and the supporting legs 21 of the mobile trolley 2 are supported on the supporting surface. The driving gear 7 at the output end of the hydraulic motor 6 of its driving mechanism engages and rotates along the rack 14 on the trestle main body 1, and the bucket of the engineering machinery 11 cooperates with the movement of the trestle main body 1 to adjust the corresponding position and the size of the pressure counterweight, thereby moving the trestle main body 1 to a predetermined position, thereby driving the walking roller 5 to cross the obstacle 10. The above process is to achieve the balance of the center of gravity of the trestle body 1 by applying pressure on the side with a short lever arm of the trestle body 1. Of course, the balance of the center of gravity of the trestle body 1 can be achieved by pulling on the side with a long lever arm of the trestle body 1.

[0022] The hydraulic motor 6 is used as the driving mechanism. The hydraulic motor 6 has very small inertia when it stops, so it can stop immediately, and basically does not bring inertial impact to the gear and rack, and the service life of the equipment is longer.

[0023] At least one side of the mobile trolley 2 of the present invention is provided with a guide groove 23 for guiding concrete; the mobile trolley 2 is provided with an adjustment mechanism 24 for adjusting the diversion direction of the guide groove 23. Specifically, the adjustment mechanism 24 includes a support frame 241, a central support rod 242, a pitch cylinder 243 and a swing cylinder 244. The support frame 241 is fixed to the side of the mobile trolley 2, the central support rod 242 is rotatably sleeved on the sleeve of the support frame 241, and the inclined frame at the upper end of the central support rod 242 is hinged to the middle of the bottom surface of the guide groove 23; the lower end of the pitch cylinder 243 is hinged to the lower end of the central support rod 242, and the upper end of the pitch cylinder 243 is hinged to the lower end or upper end of the bottom surface of the guide groove 23, which is used to drive the pitch of the guide groove 23; the two ends of the swing cylinder 244 are respectively hinged to the ears of the support frame 241 and the central support rod 242, which is used to drive the guide groove 23 to swing in the horizontal plane. The diversion direction of the diversion groove 23 can be adjusted by the adjustment mechanism 24, which makes the use more flexible and the construction operation more convenient.

[0024] The front end of the trestle body 1 is rotatably connected to a front approach bridge 8, which is driven to flip by a front flip cylinder; the rear end of the trestle body 1 is rotatably connected to a rear approach bridge 9, which is driven to flip by a rear flip cylinder. By providing the flippable front approach bridge 8 and rear approach bridge 9, it is convenient for engineering machinery to get on and off the trestle.

[0025] The above describes a specific embodiment of the present invention, but those skilled in the art should understand that this is only an example. Without departing from the principle and essence of the present invention, those skilled in the art can make various changes or modifications to this embodiment. For example, when crossing an obstacle, the mobile trolley 2 can be moved to the end of the trestle body 1 close to the running roller 5, and then the bucket of the engineering machinery 11 (such as a hook machine) can lift the end of the trestle body 1 close to the running roller 5 to achieve the corresponding position of the movement and the size of the pressure counterweight force, so that the trestle body maintains a balanced center of gravity during the forward movement. However, these changes and modifications fall within the scope of protection of the present invention.

Claims

1. A tunnel construction trestle capable of crossing obstacles, comprising a trestle main body, a moving trolley connected to the trestle main body, characterized in that: Front jacking mechanisms are provided on both sides of the front end of the trestle body, rear jacking mechanisms and walking rollers are provided on both sides of the rear end of the trestle body, support legs that can be raised and lowered are provided on both sides of the moving trolley, and a driving mechanism for driving the mutual movement between the moving trolley and the trestle body is connected; when the driving mechanism is working, the supporting legs of the moving trolley touch the ground to support the trestle body, and an external force is applied to one end of the trestle body so that the trestle body keeps the center of gravity balanced on the moving trolley, and the driving mechanism drives the trestle body to walk on the trolley and drives the walking rollers to leave the ground and cross obstacles.

2. The tunnel construction trestle capable of crossing obstacles according to claim 1, characterized in that: The external force applied is that the engineering machinery applies pressure on the side of the trestle main body with a short force arm taking the moving trolley as a fulcrum, or pulls on the side of the trestle main body with a long force arm.

3. The tunnel construction trestle capable of crossing obstacles according to claim 1, characterized in that: At least one side of the mobile trolley is provided with a guide groove for guiding concrete; the mobile trolley is provided with an adjustment mechanism for adjusting the guide direction of the guide groove; the adjustment mechanism includes a support frame, a central support rod, a pitch cylinder and a swing cylinder, the support frame is fixed to the side of the mobile trolley, the central support rod is rotatably sleeved on the sleeve of the support frame, the inclined frame at the upper end of the central support rod is hinged to the middle part of the bottom surface of the guide groove; the lower end of the pitch cylinder is hinged to the lower end of the central support rod, and the upper end of the pitch cylinder is hinged to the lower end or upper end of the bottom surface of the guide groove, which is used to drive the pitch of the guide groove; the two ends of the swing cylinder are respectively hinged to the support ears of the support frame and the central support rod, which is used to drive the guide groove to swing in the horizontal plane.

4. The tunnel construction trestle capable of crossing obstacles according to claim 3, characterized in that: The bottom of the supporting leg is rotatably connected with a movable foot.

5. The tunnel construction trestle capable of crossing obstacles according to claim 1, characterized in that: The trestle bridge body comprises box beams located at both sides and a cross beam located between the two box beams, and panels are laid on the cross beams.

6. The tunnel construction trestle capable of crossing obstacles according to claim 1, characterized in that: The driving mechanism comprises a hydraulic motor fixed on the moving trolley, a driving gear is fixed on the output end of the hydraulic motor, and a rack is fixed on the main body of the trestle along the length direction, and the rack is meshed with the driving gear.

7. The tunnel construction trestle capable of crossing obstacles according to claim 6, characterized in that: The rack is fixed on the inner side of the box beam at the side of the trestle main body.

8. A tunnel construction trestle capable of crossing obstacles according to claim 1 or 6, characterized in that: The two sides of the mobile trolley are respectively provided with an upper hanging wheel and a lower tug wheel which match with the trestle body. The upper hanging wheel is rollingly connected to the guide rail above the trestle body, and the lower tug wheel is rollingly connected to the guide rail below the trestle body.

9. The tunnel construction trestle capable of crossing obstacles according to claim 1, characterized in that: The front end of the trestle body is rotatably connected to a front approach bridge, which is driven to flip by a front flip cylinder; the rear end of the trestle body is rotatably connected to a rear approach bridge, which is driven to flip by a rear flip cylinder.

10. A method for crossing obstacles of a tunnel construction trestle capable of crossing obstacles according to any one of claims 1 to 9, which is used for the walking rollers of the trestle to cross obstacles, characterized in that: The supporting legs of the mobile trolley are supported on the supporting surface, and the mobile trolley drives the trestle body forward. During the forward movement of the trestle body, a force is applied to one end of the trestle body through engineering machinery, so that the trestle body maintains a balanced center of gravity during the forward movement. At this time, the walking rollers of the trestle body leave the supporting surface, and the forward movement of the trestle body drives the walking rollers to cross obstacles.

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