A trestle device

Abstract

The utility model discloses a trestle equipment, including main bridge and be located in the front end of the main bridge's front lead bridge, be equipped with telescopic drive mechanism on the main bridge, be equipped with the first jacking mechanism on telescopic drive mechanism, the front lead bridge with first jacking mechanism is connected, the main bridge front end is equipped with the second jacking mechanism for jacking the front lead bridge. The utility model can utilize first jacking mechanism and second jacking mechanism and lift the front lead bridge whole, thereby separates with the main bridge, reduces the friction resistance and wear and tear in the telescopic process of front lead bridge, and telescopic drive mechanism can drive the front lead bridge relative telescopic main bridge through first jacking mechanism, when, can increase the overall length of trestle equipment of the front lead bridge extension main bridge, when, then can avoid the additional construction space of the main bridge front end, thereby satisfy the requirement of construction interval length, and can reduce the span and specification of main bridge, and then reduce the weight of main bridge, more portable, uses more flexible.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction machinery technology, and in particular to a trestle bridge device. Background Technology

[0002] With the rapid promotion of automation and mechanization in tunnel construction in my country, self-propelled trestle bridges have largely replaced the original simple trestle bridges in the invert arch construction area. The number of single construction sections under the self-propelled trestle bridges has also increased to two. Combined with the construction method of self-propelled integral invert arch formwork, the current invert arch trestle bridges play an important role in tunnel construction, making the construction area of ​​the invert arch clearer and not affecting vehicle traffic.

[0003] To further accelerate tunnel construction efficiency, ensure construction quality, and extend concrete curing time, higher requirements have been placed on the invert arch trestle bridge, requiring the number of construction sections beneath it to be expanded to three. While existing self-propelled trestle bridges with ultra-long spans meet the requirement of three construction sections, their bulky nature (when there are three construction sections beneath the trestle bridge, the total length is generally greater than 3×12 meters; furthermore, due to the ultra-long span, the main beam specifications also need to be increased to ensure the trestle bridge's load-bearing capacity meets requirements, resulting in excessive overall weight) makes them inconvenient to use, difficult to manufacture, and costly. These shortcomings are particularly pronounced in narrow-section tunnels. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a trestle device that can meet the length requirements of the construction area, while also helping to reduce its own weight and making it more convenient to use.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A trestle device includes a main bridge and a front approach bridge located at the front end of the main bridge. The main bridge is provided with a telescopic drive mechanism and a first lifting mechanism. The front approach bridge is connected to the first lifting mechanism, and the front end of the main bridge is provided with a second lifting mechanism for lifting the front approach bridge.

[0006] As a further improvement to the above technical solution: the telescopic drive mechanism includes a guide rail, a movable seat, and a movable drive component. The guide rail and the movable drive component are disposed on the main bridge. The movable seat is disposed on the guide rail and connected to the movable drive component. The first lifting mechanism is disposed on the movable seat.

[0007] As a further improvement to the above technical solution: the main bridge includes two rows of main beams arranged side by side, the guide rail is located on the inner side of the two rows of main beams, the movable seat is provided with a movable crossbeam, the movable crossbeam is located above the main beam, and the first lifting mechanism is located at both ends of the movable crossbeam.

[0008] As a further improvement to the above technical solution: the movable seat is provided with traveling wheels that cooperate with the guide rail and guide wheels that cooperate with the inner side of the main beam.

[0009] As a further improvement to the above technical solution: the moving drive component includes two parallel chains, which are arranged one-to-one on the inner side of the two columns of main beams, and the bottom of the moving seat is connected to the chains.

[0010] As a further improvement to the above technical solution: the first lifting mechanism includes a support, a first lifting drive member and a lifting seat, the support is disposed on the telescopic drive mechanism, the first lifting drive member is disposed on the support and connected to the lifting seat, and the front guide bridge is connected to the lifting seat.

[0011] As a further improvement to the above technical solution: the front bridge includes a main body and a transition bridge. The rear end of the main body is hinged to the front end of the first lifting mechanism, and the front end of the transition bridge is hinged to the rear end of the first lifting mechanism. The first lifting mechanism is provided with a swing drive for driving the transition bridge to swing up and down.

[0012] As a further improvement to the above technical solution: the second lifting mechanism includes a lifting beam, a second lifting drive, guide sleeves on both sides of the front end of the main bridge and guide posts at both ends of the lifting beam. The guide posts are correspondingly inserted into the guide sleeves, and the second lifting drive is located inside the guide sleeves and connected to the guide posts.

[0013] As a further improvement to the above technical solution: the second lifting mechanism is provided with a pulley at the top.

[0014] As a further improvement to the above technical solution: the second lifting mechanism is provided with a limiting member on the side of the front approach bridge.

[0015] Compared with the prior art, the advantages of this utility model are: The trestle equipment disclosed in this utility model can be used to lift the front approach bridge as a whole using the first and second lifting mechanisms, thereby separating it from the main bridge. This reduces frictional resistance and wear during the extension and retraction of the front approach bridge. The extension and retraction drive mechanism can drive the front approach bridge to extend and retract relative to the main bridge through the first lifting mechanism. When the front approach bridge extends out of the main bridge, it can increase the overall length of the trestle equipment. When the front approach bridge retracts back onto the main bridge, it can create additional construction space at the front end of the main bridge, thereby meeting the requirements for the length of the construction section. Moreover, it can reduce the span and specifications of the main bridge, thereby reducing the weight of the main bridge, making it lighter and more flexible to use, especially in narrow-section tunnels.

[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the trestle equipment of this utility model. Figure 2 This is a front view structural diagram of the front axle of this utility model in its retracted state.

[0018] Figure 3 This is a front view structural diagram of the front approach bridge of this utility model in the extended state.

[0019] Figure 4 yes Figure 3 AA view.

[0020] Figure 5 yes Figure 3 BB view.

[0021] Figure 6 This is a top view of the trestle equipment of this utility model.

[0022] Figure 7 This is a three-dimensional structural diagram of the movable seat in this utility model.

[0023] Figure 8 This is a schematic diagram of the main structure of the movable seat in this utility model.

[0024] Figure 9 This is a three-dimensional structural diagram of the first lifting mechanism in this utility model.

[0025] Figure 10 This is a schematic diagram of the main structure of the first lifting mechanism in this utility model.

[0026] Figure 11 This is a three-dimensional structural diagram of the second lifting mechanism in this utility model.

[0027] Figure 12 This is a schematic diagram of the main structure of the second lifting mechanism in this utility model.

[0028] The labels in the diagram represent: 1. Main bridge; 11. Main beam; 12. Traveling mechanism; 13. Trench trolley; 14. Telescopic outrigger; 2. Front approach bridge; 21. Main body; 22. Transition approach bridge; 23. Swing drive component; 3. Telescopic drive mechanism; 31. Guide rail; 32. Moving seat; 321. Traveling wheel; 322. Guide wheel; 33. Moving drive component; 34. Moving crossbeam; 4. First lifting mechanism; 41. Support; 42. First lifting drive component; 43. Lifting seat; 5. Second lifting mechanism; 51. Lifting crossbeam; 52. Second lifting drive component; 53. Guide sleeve; 54. Guide column; 55. Pulley; 56. Limiting component; 6. Rear approach bridge. Detailed Implementation

[0029] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only 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.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Figures 1 to 12This illustration shows an embodiment of the trestle device of this utility model. The trestle device of this embodiment includes a main bridge 1 and a front approach bridge 2 located at the front end of the main bridge 1. The main bridge 1 is equipped with a telescopic drive mechanism 3, and the telescopic drive mechanism 3 is equipped with a first lifting mechanism 4. The front approach bridge 2 is connected to the first lifting mechanism 4. A second lifting mechanism 5 for lifting the front approach bridge 2 is located at the front end of the main bridge 1. Here, the front-back direction refers to the length direction of the tunnel, or longitudinal direction, with the excavated end of the tunnel being the front. Correspondingly, the width direction of the tunnel refers to the transverse direction, or left-right direction.

[0034] Preferably, the rear end of the main bridge 1 is connected to a rear approach bridge 6 (for example, the front end of the rear approach bridge 6 is hinged to the rear end of the main bridge 1), so that vehicles or other construction equipment can get on and off the main bridge 1 from the rear end; the rear end of the main bridge 1 is provided with a walking mechanism 12 (for example, a walking wheel set or track, etc.), and the front end is provided with telescopic outriggers 14. The main bridge 1 is also provided with a trolley 13, which is also provided with telescopic outriggers 14, thereby realizing the walking function of the trolley equipment, that is, the trolley equipment is a self-propelled trolley. Specifically: the trolley 13 first moves to the front end of the main bridge 1, and then the telescopic outriggers 14 on it extend to provide support for the main bridge 1. The telescopic outriggers 14 at the front end of the main bridge 1 retract and detach from the ground. Then the walking mechanism 12 starts, driving the trolley equipment to move forward as a whole. After moving forward a certain distance, it stops. The telescopic outriggers 14 at the front end of the main bridge 1 extend to provide support for the main bridge 1. The telescopic outriggers 14 on the trolley 13 retract, and then it moves to the front end of the main bridge 1 again. This cycle is repeated to realize the step-by-step movement of the trolley equipment.

[0035] In this embodiment, the trestle device can be used to lift the front approach bridge 2 as a whole using the first lifting mechanism 4 and the second lifting mechanism 5, thereby separating it from the main bridge 1. This reduces frictional resistance and wear during the extension and retraction of the front approach bridge 2. The telescopic drive mechanism 3 can drive the front approach bridge 2 to extend and retract relative to the main bridge 1 through the first lifting mechanism 4. When the front approach bridge 2 extends out of the main bridge 1 (specifically as shown in the figure), the front approach bridge 2 extends and retracts relative to the main bridge 1. Figure 3 As shown), this can increase the overall length of the trestle equipment. When the front approach bridge 2 retracts onto the main bridge 1, additional construction space can be created at the front end of the main bridge 1 (specifically as shown). Figure 2 As shown), thus meeting the requirements for the length of the construction section (preferably, Figure 2 Two construction sections, each about 12 meters long, are formed below the main bridge 1, and another construction section, each about 12 meters long, is formed in front of the main bridge 1. This reduces the span and specifications of the main bridge 1, thereby reducing its weight, making it lighter and more flexible to use, especially for narrow-section tunnels.

[0036] See details Figures 2 to 6In this embodiment, the telescopic drive mechanism 3 includes a guide rail 31, a movable seat 32, and a movable drive component 33. The guide rail 31 and the movable drive component 33 are mounted on the main bridge 1. The movable seat 32 is mounted on the guide rail 31 and connected to the movable drive component 33. The first lifting mechanism 4 is mounted on the movable seat 32. When the front axle 2 needs to extend or retract, the movable drive component 33 drives the movable seat 32 to move back and forth along the guide rail 31. The guide rail 31 provides support and guidance for the movable seat 32, preventing the movable seat 32 from shifting during movement. When the movable seat 32 moves back and forth, the first lifting mechanism 4 can drive the front axle 2 to extend or retract. The structure is simple and has good reliability.

[0037] Furthermore, in this embodiment, the main bridge 1 includes two rows of parallel main beams 11 to facilitate the passage of vehicles or other construction equipment. The guide rails 31 are located on the inner side of the two rows of main beams 11 (i.e., the opposite side of the two rows of guide rails 31), which can make full use of the space between the two rows of guide rails 31 without increasing the width of the main bridge 1. The movable seat 32 is provided with a movable crossbeam 34, which is located above the main beams 11. The first lifting mechanism 4 is located at both ends of the movable crossbeam 34, which has good symmetry and is conducive to driving the front approach bridge 2 to rise and fall as a whole and extend and retract forward and backward.

[0038] See details Figure 7 and Figure 8 Preferably, the movable seat 32 is provided with traveling wheels 321 that cooperate with the guide rail 31 and guide wheels 322 that cooperate with the inner side of the main beam 11. When the traveling wheels 321 move along the guide rail 31, they can further reduce frictional resistance, making the movement of the movable seat 32 smoother; the guide wheels 322 cooperate with the inner side of the main beam 11, which helps to prevent the movable seat 32 from shifting left or right, and can also reduce the frictional resistance between it and the main beam 11. The structure is reasonable and effective.

[0039] Preferably, the moving drive component 33 includes two parallel chains, which are correspondingly arranged on the inner sides of the two main beams 11. The bottom of the moving seat 32 is connected to the chains, which provides good symmetry, minimizes the space occupied by the chains, and provides sufficient driving force for the moving seat 32, thereby realizing the extension and retraction of the front axle 2. Of course, in other embodiments, the moving drive component 33 may also be a hydraulic cylinder, a lead screw and nut pair, etc., which will not be described in detail here.

[0040] See details Figure 9 and Figure 10 In this embodiment, the first lifting mechanism 4 includes a support 41, a first lifting drive component 42 (e.g., a cylinder, hydraulic cylinder, electric push rod, etc.), and a lifting seat 43. The support 41 is mounted on the telescopic drive mechanism 3 (specifically, at both ends of the moving crossbeam 34). The first lifting drive component 42 is mounted on the support 41 and connected to the lifting seat 43. The front axle 2 is connected to the lifting seat 43. When the front axle 2 needs to be lifted, the first lifting drive component 42 drives the lifting seat 43 to rise, and the front axle 2 can rise with the lifting seat 43. The structure is simple and reliable.

[0041] Furthermore, in this embodiment, the front axle 2 includes a main body 21 and a transition axle 22. The rear end of the main body 21 is hinged to the front end of the first lifting mechanism 4, and the front end of the transition axle 22 is hinged to the rear end of the first lifting mechanism 4. The first lifting mechanism 4 is provided with a swing drive component 23 (such as a cylinder, hydraulic cylinder, electric push rod, etc., with both ends hinged to the first lifting mechanism 4 and the transition axle 22 respectively, which can drive the transition axle 22 to swing up and down by extension and retraction) for driving the transition axle 22 to swing up and down. The transition axle 22 is provided to facilitate the elimination of the height difference between the main body 21 and the main axle 1, and to facilitate the transfer of vehicles between the main axle 1 and the main body 21. When the front axle 2 needs to extend or retract, it is lifted upward as a whole, and the swing drive component 23 drives the transition axle 22 to swing upward and separate it from the main axle 1, which helps to reduce friction and wear. The structure is reasonable and effective.

[0042] See details Figures 11 to 12 In this embodiment, the second lifting mechanism 5 includes a lifting beam 51, a second lifting drive component 52 (e.g., a cylinder, hydraulic cylinder, electric push rod, etc.), guide sleeves 53 located on both sides of the front transverse side of the main bridge 1, and guide posts 54 located at both ends of the lifting beam 51. The guide posts 54 are correspondingly inserted into the guide sleeves 53, and the second lifting drive component 52 is located within the guide sleeves 53 and connected to the guide posts 54. When the front approach bridge 2 needs to be lifted, the second lifting drive component 52 drives the guide posts 54 to rise, and the lifting beam 51 rises with the guide posts 54, thereby driving the front approach bridge 2 to rise. The guide sleeves 53 provide support for the second lifting drive component 52 and also provide guidance for the guide posts 54, preventing swaying or deviation during the lifting process. This structure has good symmetry and can provide sufficient lifting driving force for the front approach bridge 2.

[0043] Furthermore, in this embodiment, the top of the second lifting mechanism 5 is provided with a pulley 55. When the front bridge 2 extends or retracts, the pulley 55 can reduce frictional resistance, making the movement process smoother.

[0044] Furthermore, in this embodiment, the second lifting mechanism 5 is provided with a limiting member 56 on the side of the front axle 2. Under the limiting effect of the limiting member 56, the front axle 2 can avoid deflection when it extends or retracts.

[0045] The method of using this utility model trestle device is as follows: 1. When the main bridge 1 has moved into position, the first lifting mechanism 4 and the second lifting mechanism 5 lift the front approach bridge 2 upward, so that the front approach bridge 2 is separated from the main bridge 1. The swing drive component 23 drives the transition approach bridge 22 to swing upward, thereby separating it from the main bridge 1.

[0046] 2. The telescopic drive mechanism 3 drives the front axle 2 to move forward through the first lifting mechanism 4.

[0047] 3. After the front approach bridge 2 moves into place, the first lifting mechanism 4 and the second lifting mechanism 5 descend, causing the front approach bridge 1 to fall back onto the main bridge 1. At the same time, the transition approach bridge 22 swings down and falls back onto the main bridge 1. At this time, vehicles can pass through the trestle equipment.

[0048] 4. When work needs to be carried out at the bottom of the approach bridge 2, the first lifting mechanism 4 and the second lifting mechanism 5 will lift the front approach bridge 2 upward, so that the front approach bridge 2 will be separated from the main bridge 1, and the approach bridge 22 will swing upward and separate from the main bridge 1.

[0049] 5. The telescopic drive mechanism 3 drives the front axle 2 to move backward through the first lifting mechanism 4.

[0050] 6. After the front approach bridge 2 is moved into place, the first lifting mechanism 4 and the second lifting mechanism 5 descend, causing the front approach bridge 1 to fall back onto the main bridge 1. At the same time, the transition approach bridge 22 swings down and falls back onto the main bridge 1, thus creating construction space at the front end of the main bridge 1.

[0051] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the protection scope of the present invention.

Claims

1. A trestle bridge device, comprising a main bridge (1) and a front approach bridge (2) disposed at the front end of the main bridge (1), characterized in that: The main bridge (1) is provided with a telescopic drive mechanism (3), the telescopic drive mechanism (3) is provided with a first lifting mechanism (4), the front approach bridge (2) is connected to the first lifting mechanism (4), and the front end of the main bridge (1) is provided with a second lifting mechanism (5) for lifting the front approach bridge (2).

2. The trestle device according to claim 1, characterized in that: The telescopic drive mechanism (3) includes a guide rail (31), a movable seat (32), and a movable drive component (33). The guide rail (31) and the movable drive component (33) are mounted on the main bridge (1). The movable seat (32) is mounted on the guide rail (31) and connected to the movable drive component (33). The first lifting mechanism (4) is mounted on the movable seat (32).

3. The trestle device according to claim 2, characterized in that: The main bridge (1) includes two rows of main beams (11) arranged side by side. The guide rail (31) is located on the inner side of the two rows of main beams (11). The movable seat (32) is provided with a movable crossbeam (34). The movable crossbeam (34) is located above the main beam (11). The first lifting mechanism (4) is located at both ends of the movable crossbeam (34).

4. The trestle device according to claim 3, characterized in that: The movable seat (32) is provided with a traveling wheel (321) that cooperates with the guide rail (31) and a guide wheel (322) that cooperates with the inner side of the main beam (11).

5. The trestle device according to claim 3, characterized in that: The moving drive unit (33) includes two parallel chains, which are arranged one-to-one on the inner side of the two columns of main beams (11), and the bottom of the moving seat (32) is connected to the chains.

6. The trestle device according to any one of claims 1 to 5, characterized in that: The first lifting mechanism (4) includes a support (41), a first lifting drive (42) and a lifting seat (43). The support (41) is mounted on the telescopic drive mechanism (3). The first lifting drive (42) is mounted on the support (41) and connected to the lifting seat (43). The front axle (2) is connected to the lifting seat (43).

7. The trestle device according to any one of claims 1 to 5, characterized in that: The front bridge (2) includes a main body (21) and a transition bridge (22). The rear end of the main body (21) is hinged to the front end of the first lifting mechanism (4), and the front end of the transition bridge (22) is hinged to the rear end of the first lifting mechanism (4). The first lifting mechanism (4) is provided with a swing drive (23) for driving the transition bridge (22) to swing up and down.

8. The trestle device according to any one of claims 1 to 5, characterized in that: The second lifting mechanism (5) includes a lifting beam (51), a second lifting drive (52), guide sleeves (53) located on both sides of the front end of the main bridge (1) and guide posts (54) located at both ends of the lifting beam (51). The guide posts (54) are inserted into the guide sleeves (53) one by one. The second lifting drive (52) is located inside the guide sleeves (53) and connected to the guide posts (54).

9. The trestle device according to any one of claims 1 to 5, characterized in that: The second lifting mechanism (5) is equipped with a pulley (55) at the top.

10. The trestle device according to any one of claims 1 to 5, characterized in that: The second lifting mechanism (5) is provided with a limiting member (56) on the side of the front axle (2).

Images