Maintenance-free telescopic device

Abstract

The utility model relates to a maintenance-free expansion device which comprises two side beams located on the two sides of an expansion joint, and zero or at least one middle beam is arranged between the two side beams. When the number of the middle beams is zero, a stainless steel plate of an arc-shaped structure is connected between the two side beams through a locking piece, and when the number of the middle beams is at least one, stainless steel plates of arc-shaped structures are connected between the side beams and the adjacent middle beams and between the two adjacent middle beams through locking pieces. The utility model has the beneficial effects of reasonable structure, convenience in construction, avoidance of frequent maintenance and the like, can be widely applied to traffic facilities such as bridges, roads and the like, and improves the service life, the sealing property and the safety of the facilities.

Description

Technical Field

[0001] The utility model relates to a telescopic device, in particular to a maintenance-free telescopic device, belonging to the technical field of bridge construction. Background Technique

[0002] Conventional modular telescopic devices mostly use rubber waterstops to achieve the functions of sealing and waterproofing. However, during long-term use, the rubber waterstops are prone to diseases such as aging, cracking and falling off. Limited by factors such as the narrow construction space of the telescopic device and the large pressure of highway traffic maintenance during normal operation, it is very difficult to replace the waterstops in time, which leads to the infiltration of rainwater on the bridge deck from the telescopic device. Especially in winter, the infiltration of salt-spreading and snow-removing water sources will cause the components inside the displacement box to rust and become unsoldered. These components in the enclosed space are not easy to repair, resulting in the premature retirement of the entire telescopic device due to the damage of local components.

[0003] Therefore, it has important practical value to develop a maintenance-free telescopic device that does not require frequent maintenance. Content of the Utility Model

[0004] The utility model mainly aims at the above problems existing in the prior art, and provides a maintenance-free telescopic device. By using a stainless steel plate with good ductility to replace the traditional rubber waterstop and combining with a sealing element, the long-term maintenance-free operation of the telescopic device and excellent sealing and waterproof performance are realized.

[0005] The purpose of the utility model is mainly achieved through the following solutions:

[0006] A maintenance-free telescopic device includes two side beams located on both sides of the expansion joint. There are 0 or at least 1 middle beam arranged between the two side beams. When the number of middle beams is 0, a stainless steel plate with an arc structure is connected between the two side beams through a locking element. When the number of middle beams is at least 1, stainless steel plates with an arc structure are connected between the side beam and the adjacent middle beam and between adjacent two middle beams through locking elements.

[0007] Preferably, the locking element includes a locking bolt and a locking strip. The cross-section of the locking strip is a structure with a rectangle on the upper part and an isosceles trapezoid on the lower part. The length of the upper base of the isosceles trapezoid is greater than the length of the lower base, the length of the rectangle is greater than the length of the upper base of the isosceles trapezoid, and the isosceles trapezoid is located in the middle of the lower surface of the rectangle. A sealing groove adapted to the shape of the locking strip is provided on one side of the top of the side beam and on both sides of the top of the middle beam. The locking strip is provided with a plurality of first bolt holes for the locking bolts to pass through, and the side beam and the middle beam are provided with second bolt holes corresponding to the first bolt holes. A counterbore for installing the locking bolt is further provided at the top end of the locking strip.

[0008] Preferably, first sealing gaskets and second sealing gaskets are respectively provided on the surfaces of the locking strip and the sealing groove in contact with each other.

[0009] Preferably, locking portions are provided at both ends of the stainless steel plate and extend outwards. The locking portions are locked to the sealing grooves through locking bars, and the edges of the locking portions are located below the lower bottom plate of the isosceles trapezoid. Through holes for locking bolts to pass through are also provided on the locking portions.

[0010] Preferably, on the sides of the first sealing pad and the second sealing pad away from the stainless steel plate, mutually matching tooth grooves are provided vertically.

[0011] Preferably, an elastic sealing material is filled between the upper part of the stainless steel plate and the side beam and the middle beam, or between the upper part of the stainless steel plate and the two side beams.

[0012] Preferably, a plurality of the locking members are provided along the length direction of the side beam or the middle beam.

[0013] Therefore, compared with the prior art, the present utility model has the following advantages:

[0014] (1) The drainage groove of the present utility model is made of a stainless steel plate with good ductility, having good corrosion resistance, abrasion resistance and high ductility, and can effectively replace the traditional rubber waterstop, avoiding water leakage or corrosion of chemical liquids, resisting the stress of the expansion and contraction between the beams, and achieving a long-term stable sealing and waterproof effect;

[0015] (2) Through the provided sealing members and the sealing grooves on the side beam and the middle beam, the present utility model ensures the sealing and waterproof performance between the stainless steel plate and the side beam and the middle beam. At the same time, an elastic sealing material is filled inside the expansion joint to further enhance the sealing effect. When the expansion device undergoes minor deformation during normal use, these elastic materials can absorb the deformation energy, keep the sealing layer closely attached, and ensure no leakage occurs;

[0016] (3) Through the provided plurality of locking members, the present utility model adopts a modular design. The connections between the locking members are tight and easy to replace. When maintenance or replacement is required, only a single locking member needs to be operated, without interrupting traffic or removing the entire expansion device. This design not only improves the maintenance efficiency but also reduces the maintenance cost;

[0017] (4) The structure of the present utility model is simple and the cost is low, making it suitable for wide promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a schematic connection diagram of the side beam and the middle beam in the present utility model;

[0020] Figure 3 is Figure 2Enlarged view of part A;

[0021] Figure 4 is Figure 3 Enlarged view of part B;

[0022] Figure 5 is the structural schematic diagram of the stainless steel plate in the present utility model;

[0023] Figure 6 is the structural schematic diagram of the beamless structure in the present utility model.

[0024] Illustration: 1 - side beam, 2 - middle beam, 3 - locking part, 4 - stainless steel plate, 5 - locking bolt, 6 - locking strip, 7 - sealing groove, 8 - first bolt hole, 9 - second bolt hole, 10 - counterbore, 11 - first sealing gasket, 12 - second sealing gasket, 13 - locking portion, 14 - tooth groove, 15 - elastic sealing material. Specific embodiments

[0025] The technical solution of the present utility model will be further specifically described below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the implementation of the present utility model is not limited to the following embodiments, and any form of modification and / or change made to the present utility model will fall within the protection scope of the present utility model.

[0026] In the present utility model, unless otherwise specified, all parts and percentages are in weight units, and the equipment and raw materials used can be obtained from the market or are commonly used in the art. The methods in the following embodiments are conventional methods in the art unless otherwise specified. The components or equipment in the following embodiments are all standard parts or components known to those skilled in the art unless otherwise specified, and their structures and principles can be known to those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0027] Embodiment 1:

[0028] As Figure 1 、 2 shown, the present utility model provides a technical solution, a maintenance-free expansion device, including two side beams 1 located on both sides of the expansion joint, and 0 or at least 1 middle beam 2 is arranged between the two side beams 1; when the number of middle beams 2 is 0, that is, a single-joint modular expansion device is adopted, and a stainless steel plate 4 with an arc structure is connected between the two side beams 1 through a locking part 3, and when the number of middle beams 2 is at least 1, that is, a multi-joint modular expansion device is adopted, a stainless steel plate 4 with an arc structure is connected between the side beam 1 and the adjacent middle beam 2 and between adjacent two middle beams 2 through a locking part 3, and the stainless steel plate 4 has good corrosion resistance, abrasion resistance and high ductility.

[0029] Embodiment 2:

[0030] AsFigure 3 , 4 As shown in 4 , the present utility model provides another technical solution, a maintenance-free telescopic device, which is different from that of Embodiment 1 in that the above-mentioned locking member 3 is composed of a locking bolt 5 and a locking strip 6. The cross-section of the locking strip 6 has a structure with a rectangle at the upper part and an isosceles trapezoid at the lower part, and the length of the upper base of the isosceles trapezoid is greater than the length of the lower base, the length of the rectangle is greater than the length of the upper base of the isosceles trapezoid, and the isosceles trapezoid is located in the middle of the lower surface of the rectangle. Sealing grooves 7 adapted to the shape of the locking strip 6 are provided on one side of the top of the side beam 1 close to the stainless steel plate 4 and on both sides of the top of the middle beam 2. A plurality of first bolt holes 8 for the locking bolt 5 to pass through are evenly provided along the length direction of the locking strip 6, and second bolt holes 9 corresponding to the first bolt holes 8 are provided on the side beam 1 and the middle beam 2. A counterbore 10 for installing the locking bolt 5 is further provided at the top end of the locking strip 6, and sealant can be filled in the counterbore 10 after construction is completed.

[0031] Specifically, first sealing gaskets 11 and second sealing gaskets 12 are adhesively bonded to the surfaces of the locking strip 6 and the sealing groove 7 in contact respectively. The first sealing gaskets 11 and the second sealing gaskets 12 are both made of polytetrafluoroethylene sealing gaskets, which have high anti-aging performance and better sealing performance.

[0032] Specifically, as Figure 5 shown, locking portions 13 are integrally provided by extending both ends of the stainless steel plate 4 outward. The locking portions 13 are locked on the sealing grooves 7 through the locking strip 6, and the edges of the locking portions 13 are located below the lower bottom plate of the isosceles trapezoid. Through holes (not shown in the figure) for the locking bolt 5 to pass through are further provided on the locking portions 13. Through the settings of the locking bolt 5, the first bolt holes 8, the second bolt holes 9 and the through holes, the locking portions 13 of the stainless steel plate 4 can be firmly locked between the locking strip 6 and the sealing groove 7. Moreover, since the locking bolt 5 passes through the through holes on the locking portions 13, during long-term use, the stainless steel plate 4 will not be offset or loosened, and the overall structure is more stable.

[0033] Specifically, tooth grooves 14 that cooperate with each other are vertically provided on the sides of the first sealing gaskets 11 and the second sealing gaskets 12 away from the stainless steel plate 4. The setting of the tooth grooves 14 ensures the sealing performance at the splicing position of the sealing groove 7 and the locking strip 6, and further enhances the waterproof effect.

[0034] Embodiment 3:

[0035] As Figure 1 , 2As shown in the figure, the present utility model provides another technical solution, a maintenance-free expansion device. The difference from Embodiment 1 is that an elastic sealing material 15 is filled between the upper part of the above-mentioned stainless steel plate 4 and the side beam 1 and the middle beam 2 or between the upper part of the stainless steel plate 4 and the two side beams 1. When the expansion device undergoes minor deformation during normal use, these elastic materials can absorb the deformation energy, maintain the tight fit of the sealing layer, and can avoid the deposition of debris. In this embodiment, the elastic sealing material 15 adopts elastic materials such as polyurethane elastomer to ensure the sealing and waterproof effects at the splicing joint. The elastic sealing material 15 should be flush with or slightly lower than the height of the expansion joint. After filling, use tools to scrape back and forth to remove air bubbles.

[0036] Embodiment 4:

[0037] As Figure 1 、 2 As shown in the figure, the present utility model provides another technical solution, a maintenance-free expansion device. The difference from Embodiment 1 is that a plurality of the above-mentioned locking members 3 are evenly arranged along the length direction of the side beam 1 or the middle beam 2. When maintenance or replacement is required, only a single locking member 3 needs to be operated, without interrupting traffic or removing the entire expansion device. The operation is simple and the maintenance is convenient.

[0038] As Figure 6 As shown in the figure, the number of middle beams 2 is 0, that is, a single-gap modular expansion device is adopted; as Figure 1 As shown in the figure, the number of middle beams 2 is 1, that is, a multi-gap modular expansion device is adopted.

[0039] A maintenance-free expansion device provided by the present utility model uses a stainless steel plate with good ductility to make a drainage groove, which has good corrosion resistance, abrasion resistance and high ductility, can effectively replace the traditional rubber waterstop, avoid water leakage or corrosion of chemical liquids, resist the stress of the expansion between the beams, and achieve a long-term stable sealing and waterproof effect; through the provided sealing members and the sealing grooves on the side beam and the middle beam, the sealing and waterproof performance between the stainless steel plate and the side beam and the middle beam is ensured. At the same time, an elastic sealing material is filled inside the expansion joint to further enhance the sealing effect. When the expansion device undergoes minor deformation during normal use, these elastic materials can absorb the deformation energy, maintain the tight fit of the sealing layer, and ensure no leakage occurs; through the provided multiple locking members, using a modular design, the connections between the locking members are tight and easy to replace. When maintenance or replacement is required, only a single locking member needs to be operated, without interrupting traffic or removing the entire expansion device. This design not only improves the maintenance efficiency but also reduces the maintenance cost; the structure is simple, the cost is low, and it is suitable for wide promotion and application.

[0040] It should be understood that this embodiment is only used to illustrate the present utility model and not to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A maintenance-free expansion joint device, comprising two side beams (1) located on both sides of an expansion joint, characterized in that: Zero or at least one center beam (2) is arranged between the two side beams (1); when the number of the center beams (2) is zero, a stainless steel plate (4) with an arc-shaped structure is connected between the two side beams (1) via a locking piece (3); and when the number of the center beams (2) is at least one, a stainless steel plate (4) with an arc-shaped structure is connected between the side beam (1) and the adjacent center beam (2) and between two adjacent center beams (2) via a locking piece (3).

2. A maintenance-free telescopic device according to claim 1, characterized in that: The locking member (3) comprises a locking bolt (5) and a locking strip (6); the cross section of the locking strip (6) is a structure with a rectangular top and an isosceles trapezoidal bottom, the length of the upper base of the isosceles trapezoid being greater than the length of the lower base, the length of the rectangle being greater than the length of the upper base of the isosceles trapezoid, the isosceles trapezoid being located in the middle of the lower surface of the rectangle, a sealing groove (7) matching the shape of the locking strip (6) is provided on one side of the top of the side beam (1) and both sides of the top of the middle beam (2), a plurality of first bolt holes (8) for the locking bolts (5) to pass through are provided on the locking strip (6), and second bolt holes (9) corresponding to the first bolt holes (8) are provided on the side beam (1) and the middle beam (2), and a countersunk hole (10) for mounting the locking bolts (5) is also provided on the top of the locking strip (6).

3. A maintenance-free telescopic device according to claim 2, characterized in that: The surfaces where the locking strip (6) and the sealing groove (7) contact each other are respectively provided with a first sealing gasket (11) and a second sealing gasket (12).

4. A maintenance-free telescopic device according to claim 3, characterized in that: Both ends of the stainless steel plate (4) are provided with locking portions (13) extending outwards, the locking portions (13) being locked on the sealing groove (7) via a locking strip (6), and the edge of the locking portion (13) being located below the lower base plate of the isosceles trapezoid, and the locking portion (13) is also provided with a through hole for the locking bolt (5) to pass through.

5. A maintenance-free telescopic device according to claim 4, characterized in that: Mutually matching tooth grooves (14) are vertically provided on the side of the first sealing gasket (11) and the second sealing gasket (12) away from the stainless steel plate (4).

6. A maintenance-free telescopic device according to claim 1, characterized in that: An elastic sealing material (15) is filled between the upper part of the stainless steel plate (4) and the side beams (1) and the middle beam (2), or between the upper part of the stainless steel plate (4) and the two side beams (1).

7. A maintenance-free telescopic device according to claim 1, characterized in that: A plurality of locking members (3) are provided along the length direction of the side beam (1) or the middle beam (2).

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