A concealed telescopic device

Abstract

The present invention discloses a concealed telescopic device, comprising two symmetrically placed L-shaped steel plates, inner steel plates are installed on the inner sides of the two L-shaped steel plates, and a lower steel plate is installed in the area between the two inner steel plates, and the L-shaped steel plates on both sides are connected into one by the lower steel plate; and an upper steel plate is installed on the upper end of the lower steel plate; and an elastic rubber strip is filled between the inner steel plate on the L-shaped steel plate and the side wall of the L-shaped steel plate. This device solves the problems of structural seams and disease development affecting driving safety in existing modular telescopic devices, truly achieves seamlessness, and solves the material durability problem of existing seamless telescopic devices; compared with traditional modular telescopic devices, the structural seams of bridge deck telescopic devices are completely eliminated, and many problems caused by diseases of modular telescopic devices are changed.

Description

Technical Field

[0001] The invention relates to the technical equipment field of telescopic devices, in particular to a concealed telescopic device. Background Art

[0002] In the prior art, the bridge expansion device is a key component of the bridge movement and is referred to as the "bridge joint". The most widely used modular expansion device accounts for more than 80% of the domestic bridge expansion devices. For example, the patent document with the publication (announcement) number: CN 104233953A discloses "a modular intelligent bridge expansion joint". The technical solution includes anchor bars, side beams, middle beams, cross beams, rubber sealing strips, and displacement control boxes. The anchor bars are welded to the side beams, the upper part of the side beams is rigidly connected to the bridge, the lower part of the side beams is provided with cross beams, the lower body of the cross beams is provided with a supporting hanger, and the lower edge is slidably arranged in the displacement control box, the middle beam is supported by the cross beam at its lower part, and the rubber sealing strip is embedded in the groove of the side beams.

[0003] The above technical solution mainly separates the load-bearing structure and the displacement control system, so that the two do not interfere with each other when subjected to force, ensuring safety when subjected to force, reducing the number of beams, reducing the volume of the displacement control box to the minimum range, saving steel, and having strong adaptability to curved, sloped, inclined and wide bridges.

[0004] However, the modular telescopic device has a structural joint in its structure for the expansion and contraction of the bridge. When a high-speed vehicle passes through the modular telescopic device, the axle load and the vehicle inertia impact the telescopic device, causing slight vehicle jumping and noise. Therefore, the modular telescopic device is prone to structural damage to itself and the anchoring concrete, and vehicle jumping off the abutment during use, which can easily cause traffic accidents and endanger the personal safety of people on board.

[0005] In addition, most of the existing seamless expansion devices in the industry use the method of filling the grooves and structural seams with elastic materials. The filling materials are asphalt-based materials and polyurethane polymer materials. During use, they have durability problems such as cracking and aging, and none of them are truly seamless.

[0006] In order to solve the above problems, a seamless concealed bridge expansion device is designed, which can effectively solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to provide a concealed telescopic device in view of the shortcomings of the prior art; the technical solution is as follows:

[0008] A concealed telescopic device comprises two symmetrically placed L-shaped steel plates, inner steel plates are installed on the inner sides of the two L-shaped steel plates, and a lower steel plate is installed in the area between the two inner steel plates, through which the L-shaped steel plates on both sides are connected into one; an upper steel plate is installed on the upper end of the lower steel plate; and elastic rubber strips are filled between the inner steel plates and the side walls of the L-shaped steel plates.

[0009] The lower end surfaces of the L-shaped steel plates on both sides are also installed with a plurality of evenly spaced vertical plates, and the installation positions of the vertical plates correspond to and are perpendicular to the installation positions of the elastic rubber strips.

[0010] Furthermore, triangular braces are installed on both sides of each vertical plate on the lower end surface of the L-shaped steel plate, and the triangular braces are welded and fixed at the middle position of each vertical plate.

[0011] Furthermore, the vertical plates on the lower end surfaces of the two L-shaped steel plates are installed correspondingly, the two corresponding vertical plates on both sides are located on the same straight line, and the spacing between two adjacent vertical plates on the same L-shaped steel plate is set to 225 mm.

[0012] Furthermore, a gap is provided between the L-shaped steel plates on both sides, and a downwardly protruding block is provided at the middle position of the lower end of the lower steel plate, and the block is provided in the gap between the L-shaped steel plates on both sides.

[0013] Furthermore, the upper end surfaces of the L-shaped steel plate, the inner steel plate, the elastic rubber strip and the upper steel plate are all arranged flush.

[0014] Furthermore, the upper steel plate is also provided with a waist-shaped hole which passes downward through the lower steel plate and the L-shaped steel plate, and a bolt is provided in the waist-shaped hole, and the other side of the bolt is fixed by a nut, thereby fixing the upper steel plate and the lower steel plate.

[0015] Furthermore, the length of the L-shaped steel plate is set to 1000 mm, and each L-shaped steel plate is correspondingly provided with four waist-shaped holes with even intervals.

[0016] Beneficial effects: The present invention has the following beneficial effects: two L-shaped steel plates are provided on the basic components on both sides of the device, and the two L-shaped steel plates are installed into a whole by connecting the lower steel plate and the upper steel plate in the middle, and the two sides are filled with elastic rubber strips accordingly, and the bottom is provided with vertical plates and triangular supports. The buried bridge device is installed in the groove before paving the upper layer, and seamlessness is achieved after the paving operation is completed, which solves the problems of structural joints and disease development affecting driving safety in existing modular telescopic devices, truly achieves seamlessness, and solves the material durability problem of existing seamless telescopic devices; compared with traditional modular telescopic devices, the structural joints of the bridge deck telescopic device are completely eliminated, and many problems caused by the diseases of the modular telescopic device are changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the present invention;

[0018] Figure 2 It is a side view of the present invention;

[0019] Figure 3 A top view of the present invention;

[0020] Figure 4 An installation diagram is used for the present invention. DETAILED DESCRIPTION

[0021] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, a concealed telescopic device includes two symmetrically placed L-shaped steel plates 1, inner steel plates 3 are installed on the inner sides of the two L-shaped steel plates 1, and a lower steel plate 7 is installed in the area between the two inner steel plates 3, and the L-shaped steel plates 1 on both sides are connected into one by the lower steel plate 7; and an upper steel plate 4 is installed on the upper end of the lower steel plate 7; and an elastic rubber strip 2 is filled between the inner steel plate 3 on the L-shaped steel plate 1 and the side wall of the L-shaped steel plate 1.

[0023] The lower end surfaces of the L-shaped steel plates 1 on both sides are also installed with a number of evenly spaced vertical plates 5, and the installation positions of the vertical plates 5 correspond vertically to the installation positions of the elastic rubber strips 2; triangular supports 6 are also installed on both sides of each vertical plate 5 on the lower end surface of the L-shaped steel plate 1, and the triangular supports 6 are welded and fixed at the middle position of each vertical plate 5.

[0024] The vertical plates 5 on the lower end surfaces of the two L-shaped steel plates 1 are installed correspondingly, and the two corresponding vertical plates 5 on both sides are located on the same straight line, and the distance between two adjacent vertical plates 5 on the same L-shaped steel plate 1 is set to 225 mm.

[0025] A gap is provided between the L-shaped steel plates 1 on both sides, and a downwardly protruding block 71 is provided at the middle position of the lower end of the lower steel plate 7 , and the block 71 is provided at the gap between the L-shaped steel plates 1 on both sides.

[0026] The upper end surfaces of the L-shaped steel plate 1 , the inner steel plate 3 , the elastic rubber strip 2 and the upper steel plate 4 are all set flush; the length of the L-shaped steel plate 1 is set to 1000 mm, and each L-shaped steel plate 1 is correspondingly provided with four waist-shaped holes 8 with even intervals.

[0027] The upper steel plate 4 is also provided with a waist-shaped hole 8 which passes downward through the lower steel plate 7 and the L-shaped steel plate 1 , and a bolt 9 is provided in the waist-shaped hole 8 , and the other side of the bolt 9 is fixed by a nut, thereby fixing the upper steel plate 4 and the lower steel plate 7 .

[0028] The concealed telescopic device of the present invention comprises three parts: a weld composed of an L-shaped steel plate 1, a vertical plate 5, a triangular support 6, a welded part composed of an upper steel plate 4, a lower steel plate 7 and an inner steel plate 3, and elastic rubber strips 2 on the left and right sides.

[0029] An L-shaped steel plate 1 is arranged on both sides of the telescopic device slot and is welded to the vertical plate 5 respectively. The spacing between adjacent vertical plates 5 is set to 225 mm. The triangular support 6 is vertically welded to the vertical plate 5 to enhance the structural stability.

[0030] The upper steel plate 4 and the lower steel plate 7 are welded into a whole, and the edge of the L-shaped steel plate 1 is welded to the inner steel plate 3 to form a box-shaped component.

[0031] The lower part consisting of the L-shaped steel plate 1 and the vertical plate 5 is connected to the upper part consisting of the upper and lower steel plates by bolts, and the nuts are fixed to the two sides of the back of the upper steel plate 4 by welding. The L-shaped steel plates 1 on both sides are respectively provided with waist-shaped holes 8. Bolts 9 pass through the waist-shaped holes 8 from the L-shaped steel plate 1 and are connected to the nuts on the back of the upper steel plate 4 and tightened to form a whole. The waist-shaped holes 8 provide a working space for the extension and retraction of the device.

[0032] An elastic rubber strip 2 is filled between the L-shaped steel plate 1 and the inner steel plate 3, and the shear deformation of the elastic rubber strip 2 is utilized to achieve a telescopic effect.

[0033] like Figure 4 As shown, the installation process of this device is as follows: pre-install the various welded components of the concealed expansion device in the factory or at the construction site, connect them with the nuts welded on the back of the upper steel plate through the waist-shaped holes on the L-shaped steel plate with bolts, put the pre-installed concealed bridge expansion device into the reserved slot, and weld the vertical plate to the embedded steel bars of the bridge.

[0034] After the asphalt paving is completed, anti-cracking grooves with a width of 20~40mm are cut above the rubber material on both sides of the buried telescopic device. The depth is 1 / 2 thickness of the asphalt surface layer and filled with TST elastomer to realize a truly seamless telescopic device.

[0035] It solves the problems of structural joints and disease development affecting driving safety in existing modular expansion devices, truly achieves seamlessness, and solves the material durability problem of existing seamless expansion devices; compared with traditional modular expansion devices, it completely eliminates the structural joints of bridge deck expansion devices and changes many problems caused by the diseases of modular expansion devices.

[0036] The above specific implementation is only a preferred embodiment of the present invention and is not intended to limit the implementation of the present invention and the scope of the claims. All equivalent changes and modifications made according to the content of the patent protection scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A concealed telescopic device, characterized in that: The invention comprises two symmetrically placed L-shaped steel plates (1), wherein an inner steel plate (3) is installed on the inner side of each of the two L-shaped steel plates (1), and a lower steel plate (7) is installed in the area between the two inner steel plates (3), and the L-shaped steel plates (1) on both sides are connected into one piece through the lower steel plate (7); an upper steel plate (4) is installed on the upper end of the lower steel plate (7); and an elastic rubber strip (2) is filled between the inner steel plate (3) on the L-shaped steel plate (1) and the side wall of the L-shaped steel plate (1); The lower end surfaces of the L-shaped steel plates (1) on both sides are also installed with a plurality of evenly spaced vertical plates (5), and the installation positions of the vertical plates (5) correspond to and are perpendicular to the installation positions of the elastic rubber strips (2); A triangular support (6) is installed on both sides of each vertical plate (5) on the lower end surface of the L-shaped steel plate (1), and the triangular support (6) is welded and fixed at the middle position of each vertical plate (5); The vertical plates (5) on the lower end surfaces of the two L-shaped steel plates (1) are installed correspondingly, the two vertical plates (5) corresponding to the two sides are located on the same straight line, and the spacing between two adjacent vertical plates (5) on the same L-shaped steel plate (1) is set to 225 mm; a gap is set between the L-shaped steel plates (1) on both sides, and a convex block (71) protruding downward is also set at the middle position of the lower end of the lower steel plate (7), and the convex block (71) is set in the gap between the L-shaped steel plates (1) on both sides; The upper end surfaces of the L-shaped steel plate (1), the inner steel plate (3), the elastic rubber strip (2) and the upper steel plate (4) are all arranged flush; The upper steel plate (4) is also provided with a waist-shaped hole (8) penetrating downwardly through the lower steel plate (7) and the L-shaped steel plate (1), and a bolt (9) is provided in the waist-shaped hole (8), and the other side of the bolt (9) is fixed by a nut, thereby fixing the upper steel plate (4) and the lower steel plate (7).

2. A concealed telescopic device according to claim 1, characterized in that: The length of the L-shaped steel plate (1) is set to 1000 mm, and each L-shaped steel plate (1) is correspondingly provided with four waist-shaped holes (8) at even intervals.

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