Telescopic device based on polyurethane sealing supporting unit

Abstract

The utility model belongs to the technical field of expansion joints, and particularly relates to an expansion device based on a polyurethane sealing supporting unit, which comprises an anchoring unit fixed on a beam body and a comb tooth unit connected with the anchoring unit, and the comb tooth unit comprises a first comb tooth plate and a second comb tooth plate which are matched with each other. A sliding plate group is additionally arranged at a gap between the upper part of the supporting unit and the comb tooth unit, the sliding plate group comprises an upper-layer sliding plate and a lower-layer sliding plate which have relative sliding freedom degrees in the horizontal direction, the upper-layer sliding plate is fixedly connected with the first comb tooth plate, and the lower-layer sliding plate is fixedly connected with the second comb tooth plate. The upper layer sliding plate and the lower layer sliding plate which are overlapped up and down are additionally arranged between the comb plates and the supporting unit, when the first comb plate and the second comb plate move in the opposite directions, the upper layer sliding plate and the lower layer sliding plate slide relatively, and therefore external force borne by the supporting unit in the horizontal direction is reduced, the supporting unit is prevented from being torn, and the service life of the supporting unit is prolonged. The service life of the supporting unit is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to expansion joint technical field, concretely relates to a kind of expansion device based on polyurethane sealing support unit. BACKGROUND

[0002] Bridge expansion device is used to offset bridge expansion deformation, divided into riding joint type and cross joint type, riding joint type expansion device generally uses comb plate to slide each other and cross fit.

[0003] High speed of vehicle, comb tooth of comb plate is pressed, comb tooth pressed downward is easy to generate external force to beam body and cause beam body damage, so the current bridge expansion device generally sets support unit of polyurethane material below comb plate, polyurethane material has good elastoplasticity, and the deformation of support unit is used to offset the force generated by the up-down deformation of comb tooth to beam body.

[0004] But bridge expansion device is in external environment for a long time, is influenced by thermal expansion and cold shrink, two groups of comb plate move to two sides respectively, and the friction between comb plate and support unit is large, and the opposite movement of two groups of comb plate is easy to cause support unit to be torn, so bridge expansion device needs to replace support unit frequently. CONTENT OF UTILITY MODEL

[0005] In order to solve the problems existing in the prior art, the utility model provides a kind of expansion device based on polyurethane sealing support unit, by adding upper layer slide and lower layer slide of upper and lower overlap between comb plate and support unit, when first comb plate and second comb plate move in opposite direction, upper layer slide and lower layer slide generate relative sliding, to reduce the horizontal external force suffered by support unit, to avoid support unit to be torn, increase the service life of support unit.

[0006] The specific technical scheme adopted by the utility model is:

[0007] A kind of expansion device based on polyurethane sealing support unit, including the anchor unit fixed on beam body and the comb tooth unit connected with anchor unit, the comb tooth unit includes first comb plate and second comb plate, which cooperate with each other, the comb tooth on the upper part of first comb plate and second comb plate cooperates with each other and is fixedly connected with corresponding anchor unit, the lower part of first comb plate and second comb plate forms mounting groove in common, and block support unit is filled in mounting groove, slide group is additionally provided between support unit top and comb tooth unit, the slide group includes upper layer slide and lower layer slide, the upper layer slide is fixedly connected with first comb plate, and the lower layer slide is fixedly connected with second comb plate, the upper layer slide and lower layer slide are arranged above and below and form overlap structure with relative sliding freedom degree along comb tooth translation direction.

[0008] Both the upper and lower slide plates have L-shaped cross-sections. The horizontal part of the upper slide plate is attached to and fixedly connected to the first comb plate, and the vertical part of the upper slide plate is fixedly connected to the side wall of the first comb plate. The horizontal part of the upper slide plate and the support unit together clamp the horizontal part of the lower slide plate. The vertical part of the lower slide plate is fixedly connected to the side wall of the second comb plate. The overlapping part between the horizontal parts of the upper and lower slide plates forms an overlapping structure.

[0009] The horizontal part of the upper slide plate is fixedly connected to the tip of the comb teeth of the first comb plate by means of a first bolt, the vertical part of the upper slide plate is fixedly connected to the root of the comb teeth of the first comb plate by means of a second bolt, and the vertical part of the lower slide plate is fixedly connected to the root of the comb teeth of the second comb plate by means of a third bolt.

[0010] The beam body includes a main body and a cast-in-place section. The anchoring unit includes a C-shaped anchor bar and an anchoring plate. The upper and lower ends of the anchor bar are respectively cast into the cast-in-place section and the main body. The anchoring plate is located in the cast-in-place section and is fixedly connected to the anchor bar. The first comb plate and the second comb plate are fixedly connected to the beam body by means of the corresponding anchoring plates.

[0011] The anchor plate is provided with limiting holes for the limiting bars to pass through, and the anchor bars are connected to the limiting bars by a tie.

[0012] A bowl-shaped waterproof strip is suspended and fixed between the two beams. The waterproof strip is located below the support unit, and both sides of the waterproof strip are fixed in the cast-in-place section.

[0013] The beneficial effects of this utility model are:

[0014] 1. In this utility model, an upper and lower sliding plate are added between the comb plate and the support unit. Both the upper and lower sliding plates are made of polytetrafluoroethylene (PTFE). The surface of the PTFE sliding plate has a low coefficient of friction and high lubricity. When the first and second comb plates move in opposite directions, the upper and lower sliding plates slide relative to each other, thereby reducing the horizontal external force on the support unit, so as to avoid tearing the support unit and increase the service life of the support unit.

[0015] 2. The connection structure between the upper and lower sliding plates and the first and second comb plates in this utility model can ensure that the upper and lower sliding plates have a degree of freedom of sliding while ensuring that they are fixedly connected to each other, and at the same time avoid misalignment between the upper and lower sliding plates during long-term use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2It is a schematic view of the overhead structure of the comb tooth unit;

[0018] Figure 3 It is a partial schematic view of the sliding plate group of the utility model;

[0019] Figure 4 It is a schematic view of the cooperation of the sliding plate group and the comb tooth unit;

[0020] Figure 5 It is a schematic view of the structure of the comb tooth plate;

[0021] Figure 6 It is a schematic view of the structure of the anchoring plate;

[0022] In the drawings, 1, first comb tooth plate, 2, second comb tooth plate, 3, supporting plate, 4, supporting unit, 5, upper sliding plate, 501, first bolt, 502, second bolt, 6, lower sliding plate, 601, third bolt, 7, main body, 8, cast-in-place part, 9, anchoring bar, 10, anchoring plate, 11, limiting bar, 12, limiting hole, 13, waterproof belt. DETAILED DESCRIPTION

[0023] The utility model will be further described below in combination with the drawings and specific embodiments:

[0024] Specific embodiments, such as Figures 1-4 The utility model provides a telescopic device based on polyurethane sealing supporting unit 4, including the anchoring unit fixed on the beam body and the comb tooth unit connected with the anchoring unit, the comb tooth unit includes the first comb tooth plate 1 and the second comb tooth plate 2 that cooperate with each other, the comb tooth of first comb tooth plate 1 and second comb tooth plate 2 upper part cooperates with each other and is fixedly connected with the corresponding anchoring unit, and the supporting plate 3 of first comb tooth plate 1 and second comb tooth plate 2 lower part forms the mounting groove in common, and the mounting groove is filled with the blocky supporting unit 4, and the sliding plate group is additionally arranged between the supporting unit 4 top and the comb tooth unit, the sliding plate group includes upper sliding plate 5 and lower sliding plate 6, the upper sliding plate 5 is fixedly connected with first comb tooth plate 1, and the lower sliding plate 6 is fixedly connected with second comb tooth plate 2, and the upper sliding plate 5 and lower sliding plate 6 are arranged up and down and form the overlapping structure with the relative sliding freedom along the comb tooth translation direction.

[0025] The bridge telescopic device is in the external environment for a long time, is influenced by thermal expansion and cold shrink, two groups of comb tooth plates move to both sides respectively, and the friction between the comb tooth plate and the supporting unit 4 is relatively large, and the opposite movement of the two groups of comb tooth plates can easily lead to the tearing of the supporting unit 4, so the bridge telescopic device needs to replace the supporting unit 4 frequently.

[0026] Therefore, the upper layer sliding plate 5 and the lower layer sliding plate 6 are added between the comb tooth plate and the supporting unit 4, the upper layer sliding plate 5 and the lower layer sliding plate 6 are made of tetrafluoroethylene material, the sliding plate surface of the tetrafluoroethylene material has low friction coefficient and high lubricity, when the first comb tooth plate 1 and the second comb tooth plate 2 move in opposite directions, the upper layer sliding plate 5 and the lower layer sliding plate 6 slide relatively, so that the horizontal external force borne by the supporting unit 4 is reduced, and the service life of the supporting unit 4 is prolonged.

[0027] As shown in Figures 3-4 , the cross section of the upper layer sliding plate 5 and the lower layer sliding plate 6 is L-shaped structure, the horizontal part of the upper layer sliding plate 5 is connected with the first comb tooth plate 1, the vertical part of the upper layer sliding plate 5 is connected with the side wall of the first comb tooth plate 1, the horizontal part of the upper layer sliding plate 5 and the supporting unit 4 hold the horizontal part of the lower layer sliding plate 6, the vertical part of the lower layer sliding plate 6 is connected with the side wall of the second comb tooth plate 2, and the overlapping part between the horizontal part of the upper layer sliding plate 5 and the horizontal part of the lower layer sliding plate 6 is formed as an overlapping structure.

[0028] As shown in Figure 4 , in order to better show the structure of the sliding plate group, the sliding plate group is enlarged, the solid line in the figure is the upper layer sliding plate 5, the dashed line in the figure is the lower layer sliding plate 6, the dashed comb tooth plate is the first comb tooth plate 1, and the solid comb tooth plate is the second comb tooth plate 2. The connection structure of the upper layer sliding plate 5, the lower layer sliding plate 6, the first comb tooth plate 1 and the second comb tooth plate 2 can ensure that the upper layer sliding plate 5 and the lower layer sliding plate 6 are fixedly connected, and the upper layer sliding plate 5 and the lower layer sliding plate 6 have the freedom of sliding, and the dislocation of the upper layer sliding plate 5 and the lower layer sliding plate 6 in the long-term use process is avoided.

[0029] As shown in Figures 3-4 , the horizontal part of the upper layer sliding plate 5 is fixedly connected with the comb tooth tip of the first comb tooth plate 1 through the first bolt 501, the vertical part of the upper layer sliding plate 5 is fixedly connected with the comb tooth root of the first comb tooth plate 1 through the second bolt 502, and the vertical part of the lower layer sliding plate 6 is fixedly connected with the comb tooth root of the second comb tooth plate 2 through the third bolt 601.

[0030] As shown in Figure 1As shown, the beam body includes a main body part 7 and a cast-in-place part 8, the anchoring unit includes a C-shaped anchoring rib 9 and an anchoring plate 10, the upper and lower ends of the anchoring rib 9 are cast in the cast-in-place part 8 and the main body part 7 respectively, the anchoring plate 10 is located in the cast-in-place part 8 and is fixedly connected with the anchoring rib 9, the first comb tooth 1 plate and the second comb tooth 2 plate are fixedly connected with the beam body by means of the corresponding anchoring plate 10. The main body part 7 is a reinforced concrete, when pouring, the lower end of the anchoring rib 9 is fixedly connected with the reinforcing mesh in the reinforced concrete of the main body part 7 by binding, and then pouring is fixed, the upper end of the anchoring rib 9 is exposed above the main body part 7, then the anchoring plate 10 is placed, the limiting rib 11 is arranged in the middle of the anchoring plate 10, the upper end of the anchoring rib 9 is fixedly connected with the limiting rib 11 by pulling and hanging, then the formwork is supported, the cast-in-place part 8 is poured, the upper end of the anchoring plate 10 is exposed on the inside, and is used for fixedly connecting with the comb tooth unit.

[0031] As shown in Figure 1 and Figure 6 shown, the anchoring plate 10 is provided with a limiting hole 12 for the limiting rib 11 to pass through, and the anchoring rib 9 is connected with the limiting rib 11 by pulling and hanging.

[0032] As shown in Figure 1 two beam bodies are fixedly hung with a waterproof belt 13 in a bowl-shaped structure, the waterproof belt 13 is located below the supporting unit 4, and the two sides of the waterproof belt 13 are fixed in the cast-in-place part 8. The waterproof belt 13 can prevent water from penetrating into the inside of the bridge through the expansion joint, protect the bridge structure from erosion, and thus prolong the service life of the bridge.

Claims

1. A telescopic device based on a polyurethane sealing support unit, comprising an anchoring unit fixed to a beam and a comb unit connected to the anchoring unit, wherein the comb unit comprises a first comb plate (1) and a second comb plate (2) that cooperate with each other, the upper comb teeth of the first comb plate (1) and the second comb plate (2) cooperate with each other and are respectively fixedly connected to the corresponding anchoring unit, and the lower support plate (3) of the first comb plate (1) and the second comb plate (2) together form an installation groove, the installation groove being filled with a block-shaped support unit (4), characterized in that, A sliding plate assembly is added between the support unit (4) and the comb unit. The sliding plate assembly includes an upper sliding plate (5) and a lower sliding plate (6). The upper sliding plate (5) is fixedly connected to the first comb plate (1), and the lower sliding plate (6) is fixedly connected to the second comb plate (2). The upper sliding plate (5) and the lower sliding plate (6) are arranged vertically to form an overlapping structure with relative sliding freedom along the comb translation direction.

2. The telescopic device based on a polyurethane sealing support unit according to claim 1, characterized in that, The upper slide plate (5) and the lower slide plate (6) both have L-shaped cross sections. The horizontal part of the upper slide plate (5) is attached to and fixedly connected to the first comb plate (1). The vertical part of the upper slide plate (5) is fixedly connected to the side wall of the first comb plate (1). The horizontal part of the upper slide plate (5) and the support unit (4) together clamp the horizontal part of the lower slide plate (6). The vertical part of the lower slide plate (6) is fixedly connected to the side wall of the second comb plate (2). The overlapping part between the horizontal part of the upper slide plate (5) and the horizontal part of the lower slide plate (6) forms an overlapping structure.

3. The telescopic device based on a polyurethane sealing support unit according to claim 2, characterized in that, The horizontal part of the upper slide plate (5) is fixedly connected to the tip of the comb tooth of the first comb plate (1) by means of the first bolt (501), the vertical part of the upper slide plate (5) is fixedly connected to the root of the comb tooth of the first comb plate (1) by means of the second bolt (502), and the vertical part of the lower slide plate (6) is fixedly connected to the root of the comb tooth of the second comb plate (2) by means of the third bolt (601).

4. The telescopic device based on a polyurethane sealing support unit according to claim 1, characterized in that, The beam body includes a main body (7) and a cast-in-place part (8). The anchoring unit includes a C-shaped anchor bar (9) and an anchor plate (10). The upper and lower ends of the anchor bar (9) are respectively cast into the cast-in-place part (8) and the main body (7). The anchor plate (10) is located in the cast-in-place part (8) and is fixedly connected to the anchor bar (9). The first comb plate (1) and the second comb plate (2) are fixedly connected to the beam body by means of the corresponding anchor plates (10).

5. A telescopic device based on a polyurethane sealing support unit according to claim 4, characterized in that, The anchor plate (10) is provided with a limiting hole (12) for the limiting bar (11) to pass through, and the anchor bar (9) is connected to the limiting bar (11) by a pull.

6. A telescopic device based on a polyurethane sealing support unit according to claim 4, characterized in that, A bowl-shaped waterproof strip (13) is suspended and fixed between the two beams. The waterproof strip (13) is located below the support unit (4), and both sides of the waterproof strip (13) are fixed in the cast-in-place part (8).

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