A bolt self-adjusting height and leveling assembled expansion joint panel expansion device

Abstract

The present invention relates to a bolt self-adjusting height and leveling assembled expansion joint panel expansion device, which is used for adjusting the expansion joint between two beams connected to a bridge. The expansion joint device comprises an anchor plate and an expansion joint panel installed on adjacent beams by means of an installation component. The installation component comprises a bolt connection component and an intermediate support component arranged between the expansion joint panel and the beam to form a height adjustment and leveling unit. The bolt connection component comprises an embedded sleeve located in the beam and a locking bolt passing through the expansion joint panel and connected to the embedded sleeve by means of a threaded sleeve. The intermediate support component comprises a group of matching upper damping supports and lower damping supports. The matching surface between the upper damping support and the lower damping support is an inclined surface. The lower damping support is connected to the anchor plate. A fixing plate with a tightening bolt thereon is arranged on the anchor plate. The expansion joint device can be height adjusted and leveled by means of bolts, so as to ensure installation accuracy and extend the service life of the expansion joint device.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge erection, and relates to a telescopic device, in particular to a bolt self-adjusting height and leveling assembled expansion joint panel telescopic device. Background Art

[0002] Bridge expansion joints are set on bridges to prevent cracks or damage to the structure due to climate and temperature changes (thermal expansion and contraction), so that the bridge can be horizontally expanded and contracted along a rectangular shape. Bridge expansion devices are used to connect the structural joints. The installation accuracy of the expansion device is directly related to the flatness of the road. If the flatness is poor, the expansion device will produce irreversible fatigue damage under the long-term load and impact of the vehicle, causing the expansion device to loosen as a whole, affecting the normal operation of the expansion device. Therefore, the installation accuracy of the expansion device is the key and difficult point of the expansion joint installation work. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a bolt-self-adjusting height and leveling assembled expansion joint panel expansion device, which can use bolts to adjust the height and level the expansion device, ensure installation accuracy, and extend the service life of the expansion device.

[0004] The technical solution adopted by the present invention is:

[0005] A bolt-self-adjusting and leveling assembled expansion joint panel expansion device is used to adjust the expansion joint between two connected beams of a bridge. The expansion device includes an anchor plate and an expansion joint panel installed on adjacent beams by means of an installation assembly. The key point is that the installation assembly includes a bolt connection assembly and an intermediate support assembly arranged between the expansion joint panel and the beam to form a height adjustment and leveling unit. The bolt connection assembly includes an embedded sleeve located in the beam and a locking bolt that passes through the expansion joint panel and is connected to the embedded sleeve by means of a threaded sleeve. The intermediate support assembly includes a group of matching upper damping bearings and lower damping bearings. The mating surface between the upper damping bearing and the lower damping bearing is an inclined surface. The lower damping bearing is connected to the anchor plate. A fixing plate with a tightening bolt thereon is arranged on the anchor plate. The end of the tightening bolt fits with the upper damping bearing to form a lifting unit of the upper damping bearing.

[0006] A nut is arranged between the upper end of the threaded sleeve and the expansion joint panel.

[0007] The matching surfaces between the upper damping support and the lower damping support are respectively sawtooth inclined surfaces.

[0008] The beneficial effects of the present invention are as follows: a height adjustment and leveling unit for an expansion joint panel is formed by two mechanisms, a bolt connection assembly and an intermediate support assembly; the bolt connection assembly comprises an embedded sleeve, a threaded sleeve and a locking bolt which are assembled in sequence; the threaded sleeve is screwed with the embedded sleeve and the locking bolt respectively; when adjusting the height of the expansion joint panel, the height of the threaded sleeve relative to the embedded sleeve can be adjusted; the height of the locking bolt relative to the expansion joint panel is kept consistent, thereby realizing protrusion-free locking of the locking bolt; the intermediate support assembly comprises a group of matching upper damping supports and lower damping supports; the mating surface between the upper damping supports and the lower damping supports is an inclined surface; a fixing plate with a tightening bolt thereon is provided on the anchor plate; the upper damping support is moved left and right by adjusting the horizontal position of the tightening bolt on the fixing plate, thereby realizing the adjustment of the height of the upper surface of the upper damping support, thereby cooperating with the support of the height of the expansion joint panel. In the present invention, the height adjustment and leveling unit of the expansion joint panel is formed by two mechanisms, namely a bolt connection assembly and an intermediate support assembly. The operation is simple and it is convenient to realize the precise adjustment of the height of the expansion joint panel. The installation of the expansion joint panel after height adjustment is stable and reliable, which helps to improve the installation accuracy of the expansion device and prolong its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the present invention.

[0010] Figure 2 is an exploded view of a bolted connection assembly.

[0011] Figure 3 It is an exploded view of the intermediate support assembly.

[0012] In the attached drawings, 1, beam body, 2, anchor plate, 3, expansion joint panel, 4, embedded sleeve, 5, threaded sleeve, 6, locking bolt, 7, upper damping support, 8, lower damping support, 9, matching surface, 10, tightening bolt, 11, fixing plate, 12, nut. DETAILED DESCRIPTION

[0013] The present invention relates to a bolt self-adjusting height and leveling assembled expansion joint panel expansion device, which is used for adjusting the expansion joint between two beams 1 connected to a bridge. The expansion device comprises an anchor plate 2 and an expansion joint panel 3 installed on adjacent beams 1 by means of an installation assembly. The expansion device can adjust the height of the expansion joint panel 3 thereon so that it remains level with the bridge deck, thereby improving the installation accuracy, preventing the expansion device from being damaged, and extending the service life of the expansion device and the bridge deck.

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] Specific embodiments, such as Figure 1-3As shown, the installation assembly includes a bolt connection assembly and an intermediate support assembly arranged between the expansion joint panel 3 and the beam body 1 to form a height adjustment and leveling unit. The bolt connection assembly is located on the side of the expansion joint panel facing the beam body 1, and the bolt connection assembly includes a pre-embedded sleeve 4 located in the beam body 1 and a locking bolt 6 passing through the expansion joint panel 3 and connected to the pre-embedded sleeve 4 by means of a threaded sleeve 5; the intermediate support assembly is located in the middle position of the expansion joint, and the intermediate support assembly includes a group of matching upper damping bearings 7 and lower damping bearings 8, and the matching surface 9 between the upper damping bearings 7 and the lower damping bearings 8 is an inclined surface, and the lower damping bearing 8 is connected to the anchor plate 2, and a fixing plate 11 with a tightening bolt 10 thereon is provided on the anchor plate 2, and the end of the tightening bolt 10 is fitted with the upper damping bearing 7 to form a lifting unit of the upper damping bearing 7. The mating surfaces 9 between the upper damping support 7 and the lower damping support 8 are respectively serrated inclined surfaces, with an actual height of the serrations being 0.5 mm. The amount of rubber shrinkage is left, and the serrations are processed to be 0.59 mm, and after shrinkage, they are 0.5 mm, ensuring that the height adjustment is accurate to millimeters. The friction between the serrated inclined surfaces is large, which can produce greater resistance to the downward movement of the upper damping support 7, so that the position of the upper damping support 7 is firm and stable after the height is adjusted, thereby improving the support for the expansion joint panel 3 and improving the overall stability of the telescopic device.

[0016] The inner wall and the outer wall of the threaded sleeve 5 are both provided with threads, and the upper end of the threaded sleeve 5 is provided with a hexagonal hole. When installing, first use a hexagonal steel rod to match the hexagonal hole of the threaded sleeve 5, install the threaded sleeve 5 into the embedded sleeve 4, and rotate the threaded sleeve 5 to adjust the height of the threaded sleeve 5; after adjusting the height of the threaded sleeve 5, install the nut 12 on the threaded sleeve 5, the nut 12 is a thin nut, and the bottom surface of the nut 12 fits with the upper end surface of the embedded sleeve 4; according to the height of the threaded sleeve 5, place the upper damping support 7 on the lower damping support 8 so that the upper end surface of the upper damping support 7 is flush with the upper end surface of the threaded sleeve 5, adjust the horizontal position of the tightening bolt 10 on the fixing plate 11, so that the end of the tightening bolt 10 fits tightly with the side of the upper damping support 7, and place the upper damping support 7 Slide down, and at the same time, the matching surfaces 9 between the upper damping support 7 and the lower damping support 8 are respectively serrated inclined surfaces. The matching between the serrated inclined surfaces produces greater resistance to the sliding of the upper damping support 7, effectively ensuring the stable position of the upper damping support 7, so that the upper damping support 7 can support the other side of the expansion joint panel 3 in height; then lay the expansion joint panel 3 on the anchor plate 2, and make the locking bolt 6 pass through the expansion joint panel 3 and screw it with the threaded sleeve 5 to lock and fix the expansion joint panel 3. Use an Allen wrench to adjust the threaded sleeve 5 to the ideal height, and then tighten the nut 12 to the top surface of the embedded sleeve 4 to achieve the locking effect of the threaded sleeve 5 to prevent the bolt 6 from causing the threaded sleeve 5 to rotate downward when tightened to limit the height of the threaded sleeve 5, that is, to limit the height of the expansion joint panel 3.

[0017] The bolt connection assembly in the present invention is composed of an embedded sleeve 4, a threaded sleeve 5, and a locking bolt 6. A threaded sleeve 5 is added between the embedded sleeve 4 and the locking bolt 6 to prevent damage to the embedded sleeve 4 caused by a direct connection between the locking bolt 6 and the embedded sleeve 4, and a transition component is provided for the embedded sleeve 4. The threaded sleeve 5 does not need to cause large-scale and deep damage to the concrete of the bridge body, thereby reducing the difficulty of maintenance. The height of the expansion joint panel 3 is adjusted by the threaded cooperation of the threaded sleeve 5 and the embedded sleeve 4 to make it flush with the bridge deck, which is convenient for fine adjustment, reduces the error in the height of the expansion joint panel 3 and the bridge deck, and effectively extends the service life of the expansion device and the bridge.

Claims

1. A bolt self-adjusting height and leveling assembled expansion joint panel expansion device, used for adjusting the expansion joint between two beams (1) connected to a bridge, the expansion joint device comprising an anchor plate (2), an expansion joint panel (3) installed on adjacent beams (1) by means of an installation assembly, characterized in that: The installation assembly comprises a bolt connection assembly and an intermediate support assembly arranged between the expansion joint panel (3) and the beam body (1) to form a height adjustment and leveling unit, the bolt connection assembly comprises a pre-buried sleeve (4) located in the beam body (1) and a locking bolt (6) passing through the expansion joint panel (3) and connected to the pre-buried sleeve (4) by means of a threaded sleeve (5), the intermediate support assembly comprises a set of upper damping supports (7) and lower damping supports (8) arranged in a matching manner, the mating surface (9) between the upper damping supports (7) and the lower damping supports (8) being an inclined surface, the lower damping supports (8) being connected to the anchor plate (2), the anchor plate (2) being provided with a fixing plate (11) having a tightening bolt (10) thereon, the end of the tightening bolt (10) being fitted with the upper damping supports (7) to form a lifting unit of the upper damping supports (7); A nut (12) is provided between the upper end of the threaded sleeve (5) and the expansion joint panel (3); The mating surfaces (9) between the upper damping support (7) and the lower damping support (8) are respectively sawtooth-shaped inclined surfaces, and the height of the sawtooth is greater than the actual height during processing.

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