Adjustable temporary steel bridge for tunnel construction

Abstract

The utility model relates to the technical field of tunnel construction equipment, in particular to an adjustable temporary steel bridge for tunnel construction, which comprises cross beams, longitudinal beams, a second longitudinal beam, guide posts and a width adjusting mechanism, the two cross beams are arranged in parallel, the longitudinal beams are arranged on the side parts of the cross beams, the end parts of the two longitudinal beams are oppositely arranged, the end parts of the second longitudinal beam are connected in the longitudinal beams in a sliding manner, and the width adjusting mechanism is arranged on the guide posts. Sliding grooves are formed in the bottom ends of the second longitudinal beams and slidably connected with guide columns, the guide columns are installed on the bottom walls of the longitudinal beams, the bottom ends of the second longitudinal beams are connected with supporting beams through width adjusting mechanisms, the supporting beams are installed at the bottoms of the cross beams, the width between the two longitudinal beams is adjusted through the width adjusting mechanisms, and steel plates with the corresponding sizes are laid on the cross beams and the longitudinal beams. And the applicability of the bridge to different tunnel construction sites is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction equipment, in particular to an adjustable steel temporary bridge used for tunnel construction. Background Art

[0002] A temporary bridge for tunnel construction refers to a temporary bridge built during the construction of a tunnel project to meet construction needs. The main function of a temporary bridge is to ensure smooth traffic at the entrance and exit of the tunnel, so that construction personnel, materials and equipment can enter and exit the tunnel construction site smoothly. The design and construction of a temporary bridge should fully consider safety and practicality to ensure that it does not affect the progress of the tunnel project while meeting traffic needs.

[0003] However, the prior art still has shortcomings. For example, patent number: CN202220486847.5 is a temporary bridge convenient for tunnel construction, which comprises guardrail piles, and guardrail piles are longitudinally arranged on both sides of the construction tunnel; a crown beam, which is placed on the top of the guardrail piles and connects the guardrail piles; and a bridge deck, which is embedded in the crown beam and is flush with the top of the crown beam; a plurality of longitudinal beams are arranged in parallel at intervals below the bridge deck, the bridge deck is laid flat on the road surface above the construction tunnel, and the longitudinal beams under the bridge deck are embedded in the crown beams above the construction tunnel. When the working environment in the tunnel changes, the device cannot adjust the width of the bridge and has poor applicability. Utility Model Content

[0004] The utility model aims to provide an adjustable steel temporary bridge for tunnel construction to solve the situation raised in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an adjustable steel temporary bridge for tunnel construction, comprising: a crossbeam, a longitudinal beam, a second longitudinal beam, a guide column and a width adjustment mechanism, wherein the two crossbeams are arranged in parallel, the side of the crossbeam is equipped with a longitudinal beam, the two ends of the longitudinal beams are arranged opposite to each other, the end of the second longitudinal beam is slidably connected in the longitudinal beam, a slide groove is opened at the bottom end of the second longitudinal beam, the slide groove is slidably connected to the guide column, the guide column is installed on the bottom wall of the longitudinal beam, the bottom end of the second longitudinal beam is connected to the support beam through the width adjustment mechanism, and the support beam is installed at the bottom of the crossbeam.

[0006] Preferably, the width adjustment mechanism includes: a screw, a threaded block and a push rod, the bottom of the second longitudinal beam is rotatably connected to a screw, a threaded block is threadedly connected to the screw, the ends of the push rod are hinged at both ends of the threaded block, the other end of the push rod is hinged to the side of the support beam, and a hand wheel is installed at the bottom of the screw.

[0007] Preferably, each end of the crossbeam is slidably connected to an end of a crossbeam 2, the other end of the crossbeam 2 is slidably connected to another crossbeam, two slide grooves 2 are opened on the bottom wall of the crossbeam 2, and a guide column 2 is slidably connected in the slide groove 2, and the guide column 2 is installed inside the crossbeam.

[0008] Preferably, a rib plate is installed between the support beam and the longitudinal beam.

[0009] Preferably, a second rib plate is installed between the support beam and the cross beam.

[0010] Preferably, a bottom plate is provided at the bottom end of the support beam, and a rib plate three is provided between the bottom plate and the support beam.

[0011] Preferably, a universal wheel is provided below the base plate, the top end of the universal wheel is connected to the bottom end of the lifting mechanism, and the lifting mechanism is installed in the support beam.

[0012] Preferably, the lifting mechanism includes: screw 2, worm wheel, steering tube and worm, the top end of the universal wheel is rotatably connected to the bottom end of the connecting rod, the top end of the connecting rod is connected to the bottom end of screw 2, screw 2 is threadedly connected to thread block 2, thread block 2 is arranged in the worm wheel, the worm wheel is meshingly connected to the worm, the end of the worm is rotatably installed inside the support beam, the end of the worm that passes through the outside of the support beam is equipped with handwheel 2, the bottom end of the worm wheel is equipped with a steering tube, and the steering tube is rotatably connected to the inner wall of the support beam.

[0013] Preferably, a guide plate is installed in the support beam, and the circular hole on the guide plate is rotatably connected to the connecting rod.

[0014] Preferably, a guardrail is installed at the top of the crossbeam, and two guardrails are arranged in parallel.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. The width between the two longitudinal beams is adjusted through the width adjustment mechanism, and steel plates of corresponding sizes are laid on the cross beams and longitudinal beams, which improves the applicability of the bridge to different tunnel construction sites;

[0017] 2. Setting a second crossbeam to be slidably connected with the two crossbeams makes it easy to adjust the length of the bridge according to actual conditions, thereby further improving the applicability and practicality of the bridge for the construction site. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the screw structure of the utility model;

[0020] Figure 3 It is a cross-sectional view of the second beam of the utility model;

[0021] Figure 4 This is a schematic diagram of the installation position of the rib plate 2 of the utility model;

[0022] Figure 5It is a second cross-sectional view of the screw of the utility model;

[0023] Figure 6 This is a schematic diagram of the installation position of the steering tube of the present invention.

[0024] In the figure: cross beam 1, longitudinal beam 2, longitudinal beam 2 3, guide column 4, width adjustment mechanism 5, screw 6, threaded block 7, push rod 8, cross beam 2 9, guide column 2 10, rib plate 11, rib plate 2 12, bottom plate 13, rib plate 3 14, universal wheel 15, screw 2 16, worm gear 17, steering tube 18, worm 19, guide plate 20, guardrail 21. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Example 1: Reference Figure 1 and Figure 2 , an adjustable steel temporary bridge for tunnel construction, comprising: a crossbeam 1, a longitudinal beam 2, a longitudinal beam 3, a guide column 4 and a width adjustment mechanism 5, the two crossbeams 1 are arranged in parallel, the side of the crossbeam 1 is equipped with a longitudinal beam 2, the ends of the two longitudinal beams 2 are arranged opposite to each other, the end of the longitudinal beam 2 3 is slidably connected in the longitudinal beam 2, the bottom end of the longitudinal beam 2 3 is provided with a slide groove, the slide groove is slidably connected to the guide column 4, the guide column 4 is installed on the bottom wall of the longitudinal beam 2, the bottom end of the longitudinal beam 2 3 is connected to the support beam through the width adjustment mechanism 5, and the support beam is installed at the bottom of the crossbeam 1.

[0028] The principle of the above scheme is:

[0029] Move the temporary bridge to the designated work position in the tunnel, and adjust the width adjustment mechanism 5. When the width between the bridges increases, the width adjustment mechanism 5 drives the two supporting beams away from each other, the supporting beams drive the longitudinal beam 2 to move, and the two guide columns 4 are slidably connected to the slide grooves at the bottom ends of the longitudinal beams 2 and away from each other; when the width between the bridges decreases, the width adjustment mechanism 5 drives the two supporting beams closer to each other, the supporting beams drive the longitudinal beam 2 to move, and the two guide columns 4 closer to each other; after the width adjustment of the temporary bridge is completed, steel plates of corresponding sizes are laid on the crossbeam 1 and the longitudinal beam 2 to facilitate the passage of people and equipment.

[0030] The beneficial effects of the above scheme are:

[0031] The width between the two longitudinal beams 2 is adjusted by the width adjustment mechanism 5, and steel plates of corresponding sizes are laid on the cross beam 1 and the longitudinal beam 2, thereby improving the applicability of the bridge to different tunnel construction sites.

[0032] Example 2: Reference Figure 1 and Figure 2 The width adjustment mechanism 5 includes: a screw rod 6, a threaded block 7 and a push rod 8. The bottom of the longitudinal beam 3 is rotatably connected with a screw rod 6, and a threaded block 7 is threadedly connected to the screw rod 6. The ends of the threaded block 7 are respectively hinged to the ends of the push rod 8. The other end of the push rod 8 is hinged to the side of the support beam, and a hand wheel is installed at the bottom of the screw rod 6.

[0033] The principle of the above scheme is:

[0034] When the width of the bridge needs to be increased, the hand wheel is turned forward, the hand wheel drives the screw rod 6 to rotate forward, the threaded block 7 threadedly connected to the screw rod 6 moves downward relative to the screw rod 6, the angle between the two push rods 8 increases, and the two support beams are driven away from each other at the same time;

[0035] When the width of the bridge needs to be reduced, the hand wheel is turned in the opposite direction, and the hand wheel drives the screw rod 6 to reverse. The threaded block 7 threadedly connected to the screw rod 6 moves upward relative to the screw rod 6, and the angle between the two push rods 8 decreases, while driving the two support beams closer to each other.

[0036] The beneficial effects of the above scheme are:

[0037] The screw rod 6 is rotatably connected to the bottom of the longitudinal beam 2 3, which improves the stability of the bridge when the width is adjusted; at the same time, the screw rod 6 is threadedly connected to the threaded block 7, and the two ends of the threaded block 7 are each hinged with an end of a push rod 8, and the other end of the push rod 8 is hinged to the supporting beam, which improves the synchronization of the bridge when the width is adjusted.

[0038] Example 3: Reference Figure 1 and Figure 3The two ends of the beam 1 are each slidably connected to the end of a beam 2 9, and the other end of the beam 2 9 is slidably connected to another beam 1. The bottom wall of the beam 2 9 has two sliding grooves 2, and the guide column 2 10 is slidably connected in the sliding groove 2. The guide column 2 10 is installed inside the beam 1.

[0039] The principle of the above scheme is:

[0040] The second crossbeam 9 is slidably connected to the crossbeam 1, and the second guide column 10 in the crossbeam 1 is slidably connected to the second slide groove on the bottom wall of the second crossbeam 9. After the width of the bridge is adjusted, the width of the bridge can be adjusted according to actual conditions. When the length of the bridge needs to be increased, the two crossbeams 1 are moved in opposite directions, and the two guide columns 10 are displaced in opposite directions while being slidably connected to the second slide groove; when the length of the bridge needs to be reduced, the two crossbeams 1 are moved in opposite directions, and the two guide columns 10 are displaced in opposite directions while being slidably connected to the second slide groove.

[0041] The beneficial effects of the above scheme are:

[0042] The second crossbeam 9 is provided to be slidably connected with the two crossbeams 1, so as to adjust the length of the bridge according to the actual situation, and further improve the applicability and practicality of the bridge to the construction site.

[0043] Example 4: Reference Figure 2 A rib plate 11 is installed between the support beam and the longitudinal beam 2.

[0044] The principle of the above scheme is:

[0045] The ribs 11 reinforce the support beams and the longitudinal beams 2 .

[0046] The beneficial effects of the above scheme are:

[0047] The rib plate 11 improves the vertical bearing capacity of the bridge and improves the stability of the bridge when the width is adjusted.

[0048] Example 5: Reference Figure 4 A rib plate 12 is installed between the support beam and the cross beam 1.

[0049] The principle of the above scheme is:

[0050] The rib plate 12 is used to reinforce the supporting beam and the cross beam 1.

[0051] The beneficial effects of the above scheme are:

[0052] The stability of the crossbeam 1 is improved.

[0053] Example 6: Reference Figure 4 A bottom plate 13 is provided at the bottom end of the support beam, and a rib plate 14 is provided between the bottom plate 13 and the support beam.

[0054] The principle of the above scheme is:

[0055] The bottom plate 13 is arranged at the bottom end of the support beam, and the rib plate 14 reinforces the support beam and the bottom plate 13 .

[0056] The beneficial effects of the above scheme are:

[0057] The bottom plate 13 improves the stability of the support beam; the rib plate 14 improves the ability of the bottom plate 13 to bear pressure.

[0058] Example 7: Reference Figure 4 and Figure 5 A universal wheel 15 is provided below the bottom plate 13, the top of the universal wheel 15 is connected to the bottom of the lifting mechanism, and the lifting mechanism is installed in the support beam.

[0059] The principle of the above scheme is:

[0060] Before adjusting the width or length of the bridge, and when the bridge needs to be moved, this can be achieved by rolling the universal wheel 15. After adjusting the length and width of the bridge, the lifting mechanism is adjusted to retract the universal wheel 15 into the supporting beam.

[0061] The beneficial effects of the above scheme are:

[0062] The universal wheel 15 is arranged at the bottom end of the bridge to reduce the difficulty of moving the bridge; the lifting mechanism is arranged to release or retract the universal wheel 15 according to the actual situation, thereby improving the practicability of the bridge.

[0063] Example 8: Reference Figure 5 and Figure 6 The lifting mechanism includes: a screw rod 16, a worm wheel 17, a steering tube 18 and a worm 19. The top of the universal wheel 15 is rotatably connected to the bottom end of the connecting rod. The top of the connecting rod is connected to the bottom end of the screw rod 16. The screw rod 16 is threadedly connected to a threaded block 2. The threaded block 2 is arranged in the worm wheel 17. The worm wheel 17 is meshed and connected with the worm 19. The end of the worm 19 is rotatably installed inside the support beam. The end of the worm 19 that passes through the support beam is equipped with a hand wheel 2. The bottom end of the worm wheel 17 is equipped with a steering tube 18, and the steering tube 18 is rotatably connected to the inner wall of the support beam.

[0064] The principle of the above scheme is:

[0065] After adjusting the width and height of the bridge, turn hand wheel 2 in the forward direction. The rotation of hand wheel 2 drives worm 19 to rotate. Worm 19 drives worm wheel 17 and steering tube 18 meshing with it to rotate. The threaded block installed on worm wheel 17 drives screw 2 16 to rotate and rise relative to the support beam. Universal wheel 15 is retracted to the inside of the support beam.

[0066] The beneficial effects of the above scheme are:

[0067] The steering tube 18 provides guidance for the rotation of the worm wheel 17 inside the support beam, and at the same time improves the stability of the screw rod 16 when it rises or falls; the hand wheel 2 is provided to facilitate the rotation of the worm 19; the thread block 2 is provided in the worm wheel 17, and the thread block 2 is threadedly connected to the screw rod 16, which reduces the complexity of the device and simplifies the design between the components.

[0068] Example 9: Reference Figure 5 A guide plate 20 is installed in the support beam, and the round hole on the guide plate 20 is rotatably connected to the connecting rod.

[0069] The principle of the above scheme is:

[0070] The circular hole on the guide plate 20 is rotatably connected to the connecting rod.

[0071] The beneficial effects of the above scheme are:

[0072] The holes provide a guide for the link as it rises or descends within the support beam, preventing it from swinging as it moves.

[0073] Example 10: Reference Figure 4 A guardrail 21 is installed at the top of the crossbeam 1, and two guardrails 21 are arranged in parallel.

[0074] The principle of the above scheme is:

[0075] A guardrail 21 is installed on the top of the beam 1.

[0076] The beneficial effects of the above scheme are:

[0077] It provides protection for the passage of personnel and equipment and prevents the fall of personnel or equipment, thus improving the safety of the bridge.

[0078] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. An adjustable steel temporary bridge for tunnel construction, characterized in that: include: A crossbeam (1), a longitudinal beam (2), a second longitudinal beam (3), a guide column (4) and a width adjustment mechanism (5), wherein the two crossbeams (1) are arranged in parallel, the longitudinal beam (2) is installed on the side of the crossbeam (1), the ends of the two longitudinal beams (2) are arranged opposite to each other, the end of the second longitudinal beam (3) is slidably connected in the longitudinal beam (2), a sliding groove is opened at the bottom end of the second longitudinal beam (3), the sliding groove is slidably connected to the guide column (4), the guide column (4) is installed on the bottom wall of the longitudinal beam (2), the bottom end of the second longitudinal beam (3) is connected to the support beam through the width adjustment mechanism (5), and the support beam is installed at the bottom of the crossbeam (1).

2. The adjustable steel temporary bridge for tunnel construction according to claim 1, characterized in that: The width adjustment mechanism (5) comprises: a screw rod (6), a threaded block (7) and a push rod (8); the bottom of the second longitudinal beam (3) is rotatably connected to the screw rod (6); the screw rod (6) is threadedly connected to the threaded block (7); the ends of the threaded block (7) are hinged to the ends of the push rod (8); the other end of the push rod (8) is hinged to the side of the support beam; and a hand wheel is installed at the bottom end of the screw rod (6).

3. The adjustable steel temporary bridge for tunnel construction according to claim 1, characterized in that: The two ends of the crossbeam (1) are slidably connected to the end of a second crossbeam (9), and the other end of the second crossbeam (9) is slidably connected to another crossbeam (1). The bottom wall of the second crossbeam (9) is provided with two second slide grooves, and the second slide grooves are slidably connected to the second guide column (10), and the second guide column (10) is installed inside the crossbeam (1).

4. The adjustable steel temporary bridge for tunnel construction according to claim 1, characterized in that: A stiffener (11) is installed between the support beam and the longitudinal beam (2).

5. The adjustable steel temporary bridge for tunnel construction according to claim 4, characterized in that: A second stiffener plate (12) is installed between the support beam and the cross beam (1).

6. The adjustable steel temporary bridge for tunnel construction according to claim 5, characterized in that: A bottom plate (13) is installed at the bottom end of the support beam, and a rib plate (14) is installed between the bottom plate (13) and the support beam.

7. The adjustable steel temporary bridge for tunnel construction according to claim 6, characterized in that: A universal wheel (15) is provided below the bottom plate (13), the top end of the universal wheel (15) is connected to the bottom end of the lifting mechanism, and the lifting mechanism is installed in the support beam.

8. The adjustable steel temporary bridge for tunnel construction according to claim 7, characterized in that: The lifting mechanism comprises: a second screw (16), a worm wheel (17), a steering tube (18) and a worm (19); the top end of the universal wheel (15) is rotatably connected to the bottom end of a connecting rod; the top end of the connecting rod is connected to the bottom end of the second screw (16); the second screw (16) is threadedly connected to a second threaded block; the second threaded block is arranged in the worm wheel (17); the worm wheel (17) is meshed and connected to the worm (19); the end of the worm (19) is rotatably installed inside the support beam; the end of the worm (19) extending outside the support beam is equipped with a second hand wheel; the bottom end of the worm wheel (17) is equipped with a steering tube (18); and the steering tube (18) is rotatably connected to the inner wall of the support beam.

9. The adjustable steel temporary bridge for tunnel construction according to claim 8, characterized in that: A guide plate (20) is installed in the support beam, and a circular hole on the guide plate (20) is rotatably connected to the connecting rod.

10. The adjustable steel temporary bridge for tunnel construction according to claim 5, characterized in that: The top of the crossbeam (1) is provided with a guardrail (21), and the two guardrails (21) are arranged in parallel.

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