Bailey truss structure for temporary steel bridge

Abstract

The utility model relates to the technical field of bridge construction, in particular to a bailey truss structure for a temporary steel bridge, which comprises an upper chord member and a lower chord member which are arranged in parallel, extension rods are fixedly connected to two ends of the upper chord member and the lower chord member, and connecting rods are sleeved on the extension rods. A first vertical rod is connected between the upper chord member and the lower chord member, a second vertical rod is arranged between the upper connecting rod and the lower connecting rod, and a supporting rod is installed between the first vertical rod and the second vertical rod. The bailey truss solves the problems that the size of the existing bailey truss is fixed, and the length of the bailey truss cannot be adjusted as required.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a Bailey truss structure for a steel temporary bridge. Background Technique

[0002] In the field of construction projects, due to insufficient construction space or poor road conditions, Bailey trusses are often used to build temporary steel bridges to ensure smooth traffic. Existing Bailey trusses are generally composed of multiple steel bars welded together to form a specific steel frame. During use, Bailey trusses of different lengths are required according to different environments. Since the steel bars forming the Bailey truss are welded together, the length of the Bailey truss cannot be adjusted as needed, and it needs to be customized separately, resulting in poor use effects. Content of the Utility Model

[0003] In order to solve the problems of the above-mentioned existing technologies, the utility model provides a Bailey truss structure for a steel temporary bridge, which solves the problem that the existing Bailey truss has a fixed size and cannot adjust the length of the Bailey truss as needed.

[0004] To achieve the above object, the utility model provides the following technical solution: A Bailey truss structure for a steel temporary bridge, including upper chord bars and lower chord bars arranged in parallel. Both ends of the upper chord bars and the lower chord bars are fixedly connected with extension bars. Connecting rods are sleeved on the extension bars. First vertical rods are connected between the upper chord bars and the lower chord bars. Second vertical rods are arranged between the upper and lower connecting rods. Support rods are installed between the first vertical rods and the second vertical rods.

[0005] With the above structural design, by adjusting the length of the support rods, the distance between the first vertical rods and the second vertical rods can be controlled, so as to adjust the length of the Bailey truss according to actual needs, thereby improving the practicability of the Bailey truss.

[0006] Preferably, the support rod includes a threaded rod vertically and fixedly connected to the first vertical rod, a sleeve rod sleeved on one end of the threaded rod, the other end of the sleeve rod is fixedly connected to the second vertical rod, a sleeve is fixedly connected to one end of the sleeve rod, a rotating cylinder is threadedly connected to the threaded rod, and a clamping ring is fixedly connected to one end of the rotating cylinder. The clamping ring extends into the sleeve and is clamped with the sleeve.

[0007] With the above structural design, by rotating the rotating cylinder, the rotating cylinder moves on the threaded rod, and then drives the sleeve connected to the rotating cylinder to move, so as to control the length of the threaded rod extending into the sleeve, facilitating the adjustment of the length of the support rod.

[0008] Preferably, a jack is provided at the end of the left connecting rod, and a plug matched with the jack is fixedly connected to the end of the right connecting rod. A connecting bolt passes through the jack and the plug to relatively fix the two connecting rods.

[0009] With the above structural design, the operator inserts the plug into the socket, and passes the connecting bolt through the plug and the socket and tightens it with threads to achieve the rapid installation of multiple Bailey frames.

[0010] Preferably, the first vertical rod and the second vertical rod are arranged in parallel, and the support rod is arranged perpendicular to the first vertical rod and the second vertical rod.

[0011] Preferably, fixing holes are formed in the side wall of the sleeve, and a plurality of limiting holes are equidistantly arranged along the circumferential direction of the clamping ring. The fixing bolt passes through the fixing hole and the limiting hole to relatively fix the sleeve rod and the threaded rod.

[0012] With the above structural design, a locking mechanism is provided to prevent the rotating cylinder from rotating by itself under unnecessary circumstances, increasing the practicability of the device.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] By adjusting the length of the support rod, the distance between the first vertical rod and the second vertical rod can be controlled, so as to adjust the length of the Bailey frame according to actual needs, thereby improving the practicability of the Bailey frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a partial cross-sectional view of the present utility model;

[0017] Figure 3 is an internal structural diagram of the support rod of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] Please refer to Figures 1 - 3, the present utility model provides a technical solution: a Bailey truss structure for a steel temporary bridge, including upper chord bars 1 and lower chord bars 9 arranged in parallel. Both ends of the upper chord bar 1 and the lower chord bar 9 are fixedly connected with extension bars 6. A connecting rod 2 is sleeved on the extension bar 6. A first vertical rod 3 is connected between the upper chord bar 1 and the lower chord bar 9. A second vertical rod 10 is arranged between the upper and lower connecting rods 2. A support rod 5 is installed between the first vertical rod 3 and the second vertical rod 10. By adjusting the length of the support rod 5, the distance between the first vertical rod 3 and the second vertical rod 10 can be controlled, so as to adjust the length of the Bailey truss according to actual needs, thereby improving the practicability of the Bailey truss.

[0020] The support rod 5 includes a threaded rod 502 vertically and fixedly connected to the first vertical rod 3, and a sleeve rod 501 with one end sleeved on the threaded rod 502. The other end of the sleeve rod 501 is fixedly connected to the second vertical rod 10. One end of the sleeve rod 501 is fixedly connected with a sleeve 504. A rotating cylinder 505 is threadedly connected to the threaded rod 502. One end of the rotating cylinder 505 is fixedly connected with a clamping ring 503. The clamping ring 503 extends into the sleeve 504 and is clamped with the sleeve 504. By rotating the rotating cylinder 505, the rotating cylinder 505 moves on the threaded rod 502, and then drives the sleeve 504 connected to the rotating cylinder 505 to move, so as to control the length of the threaded rod 502 extending into the sleeve 504, which is convenient for adjusting the length of the support rod 5.

[0021] A jack 8 is opened at the end of the left connecting rod 2, and a plug 7 matched with the jack 8 is fixedly connected to the end of the right connecting rod 2. A connecting bolt passes through the jack 8 and the plug 7 to relatively fix the two connecting rods 2. The operator inserts the plug 7 into the jack 8, and passes the connecting bolt through the plug 7 and the jack 8 and tightens it threadedly to realize the rapid installation of multiple Bailey trusses.

[0022] The first vertical rod 3 and the second vertical rod 10 are arranged in parallel, and the support rod 5 is arranged perpendicular to the first vertical rod 3 and the second vertical rod 10. The first vertical rod 3, the second vertical rod 10, the upper chord bar 1, the lower chord bar 9 and the connecting rod 2 enclose a rectangle, and diagonal braces 4 are welded at the four corners of the rectangle.

[0023] A fixing hole is opened on the side wall of the sleeve 504. A plurality of limiting holes 506 are equidistantly arranged along the circumference of the clamping ring 503. A fixing bolt 507 passes through the fixing hole and the limiting hole 506 to relatively fix the sleeve rod 501 and the threaded rod 502. A locking mechanism is provided to prevent the rotating cylinder 505 from rotating by itself under unnecessary circumstances, which increases the practicability of the device.

[0024] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A Bailey frame structure for a steel temporary bridge, characterized in that: The invention comprises an upper chord rod (1) and a lower chord rod (9) which are arranged in parallel, wherein both ends of the upper chord rod (1) and the lower chord rod (9) are fixedly connected with an extension rod (6), a connecting rod (2) is sleeved on the extension rod (6), a first vertical rod (3) is connected between the upper chord rod (1) and the lower chord rod (9), a second vertical rod (10) is arranged between the upper and lower connecting rods (2), and a support rod (5) is installed between the first vertical rod (3) and the second vertical rod (10).

2. The Bailey frame structure for a steel temporary bridge according to claim 1, characterized in that: The support rod (5) comprises a threaded rod (502) vertically fixedly connected to the first vertical rod (3), a sleeve rod (501) with one end sleeved on the threaded rod (502), the other end of the sleeve rod (501) is fixedly connected to the second vertical rod (10), one end of the sleeve rod (501) is fixedly connected to a sleeve (504), a rotating cylinder (505) is threadedly connected to the threaded rod (502), one end of the rotating cylinder (505) is fixedly connected to a clamping ring (503), and the clamping ring (503) extends into the sleeve (504) and is clamped with the sleeve (504).

3. The Bailey frame structure for a temporary steel bridge according to claim 1, characterized in that: A socket (8) is provided at the end of the left connecting rod (2), and a plug (7) matching the socket (8) is fixedly connected to the end of the right connecting rod (2). A connecting bolt passes through the socket (8) and the plug (7) to relatively fix the two connecting rods (2).

4. The Bailey frame structure for a temporary steel bridge according to claim 1, characterized in that: The first vertical pole (3) and the second vertical pole (10) are arranged in parallel, and the support rod (5) is arranged perpendicular to the first vertical pole (3) and the second vertical pole (10).

5. The Bailey frame structure for a temporary steel bridge according to claim 2, characterized in that: A fixing hole is provided on the side wall of the sleeve (504), and a plurality of limiting holes (506) are provided on the clamping ring (503) at equal intervals along the circumferential direction. A fixing bolt (507) passes through the fixing hole and the limiting hole (506) to relatively fix the sleeve rod (501) and the threaded rod (502).

Images