A device for measuring the size of a wedge-shaped steel plate on a bridge rubber support

Abstract

The utility model discloses a device for measuring the size of the upper wedge-shaped steel plate of bridge rubber support, including lower base plate and upper base plate, characterized by: the four corners of lower base plate all are provided with lifting screw rod, and the four corners of lower base plate all are provided with the threaded hole of screw thread cooperation with lifting screw rod, the top of two lifting screw rods of one side on lower base plate is fixed with the support light ball of the lower surface of upper base plate, and the top of two lifting screw rods of the other side on lower base plate is articulated with the lower surface of upper base plate through universal joint. The utility model discloses the measuring device, places lower base plate on rubber support, then rotates four lifting screw rods, makes upper base plate and the lower surface of main beam contact, and the height of four corners of lower base plate and upper base plate is measured through vernier caliper to process upper wedge-shaped steel plate, and the size of the obtained upper wedge-shaped steel plate is accurate, and the problem of narrow space under the existing bridge not easy to measure is solved.

Description

Technical Field

[0001] This utility model relates to a measuring device, and more specifically, to a device for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings. Background Technology

[0002] Rubber bearings are a crucial component for ensuring the safe operation of bridges. To guarantee bridge safety, they need to be replaced according to their service life. In critical traffic sections, to ensure uninterrupted traffic flow, old rubber bearings must be replaced without disrupting traffic. Rubber bearings are typically manufactured to fixed sizes and models. To ensure a proper fit between the bearing and the main beam, steel plates are usually placed underneath and above the bearing. For bridges on curves, the lower surface of the main beam is usually inclined, requiring the upper steel plate to be wedge-shaped, meaning the thickness of the four corners of the upper steel plate must be different. When replacing old rubber bearings on curves, due to aging during bridge use or inconsistent bearing dimensions, the original wedge-shaped steel plate may no longer be usable, necessitating the replacement with a new upper wedge-shaped steel plate based on the specific conditions.

[0003] The current practice is to prepare a large quantity of wedge-shaped steel plates of different specifications before replacing the old rubber bearings. After replacing the bearings, the height of the top of the bearing and the four corners of the bottom steel plate of the beam are measured. Based on the measured gaps, wedge-shaped steel plates of appropriate size are selected and placed on top of the rubber bearings. Then, the added wedge-shaped steel plates are firmly welded to the original bottom steel plate of the beam and treated with anti-rust treatment. The main function of the wedge-shaped steel plates above the bridge rubber bearings is that, as they are commonly used in bridge beam structures with slopes, their special shape and material properties ensure that the bearings can be placed horizontally, thereby avoiding uneven stress and shear deformation caused by the slope.

[0004] Therefore, for bridges located on curves, the longitudinal slope of the bridge deck results in a slope along the main beam, creating an inclination angle at the supports. This is detrimental to the load transfer at the supports. In this case, wedge-shaped steel plates, matching the longitudinal and transverse slopes of the bridge, need to be installed between the bottom of the beam and the supports for leveling. However, due to the narrow space under the bridge deck, measuring the dimensions of the four corners of the wedge-shaped steel plates is difficult, and the limited field of vision makes measuring the internal height inaccurate. Furthermore, the time spent by workers on these measurements increases labor costs. Therefore, this invention proposes a device for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings. Summary of the Invention

[0005] In order to overcome the shortcomings of the above-mentioned technical problems, this utility model provides a device for measuring the size of wedge-shaped steel plates on bridge rubber bearings.

[0006] This utility model discloses a device for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings, comprising a lower pad and an upper pad, with the upper pad located above the lower pad. The device is characterized in that: each of the four corners of the lower pad is provided with a lifting screw, and each of the four corners of the lower pad has threaded holes for threaded engagement with the lifting screws; the top ends of the two lifting screws on one side of the lower pad are fixed with supporting spheres that abut against the lower surface of the upper pad; the top ends of the two lifting screws on the other side of the lower pad are hinged to the lower surface of the upper pad via universal joints, the housing of which is fixed to the lower surface of the upper pad, and the free end of which is fixed to the top end of the lifting screw.

[0007] This utility model relates to a device for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings. The universal joint is a spherical universal joint composed of a ball head seat and a universal ball head. The ball head seat is fixed on the lower surface of the upper pad, and the universal ball head is placed in the inner cavity of the ball head seat. The universal ball head is fixedly connected to the top end of the lifting screw.

[0008] The present invention relates to a device for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings, wherein a hand-tightening screw head is fixed to the lower end of the lifting screw, and an ear plate is fixed to the hand-tightening screw head.

[0009] The present invention relates to a device for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings, wherein both the lower and upper pads are square.

[0010] This utility model relates to a device for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings. In use, the lower pad is placed on the upper surface of the replaced rubber bearing.

[0011] The beneficial effects of this utility model are as follows: The device for measuring the dimensions of the wedge-shaped steel plate on a bridge rubber bearing is provided with a lower pad and an upper pad. Lifting screws are installed at each of the four corners of the lower pad, and these screws are placed in threaded holes on the lower pad. The extension length of the lifting screws can be adjusted by rotation. The tops of the two lifting screws on one side of the lower pad are fixed to a support ball that contacts the lower surface of the upper pad. The two lifting screws on the other side are hinged to the lower surface of the upper pad via universal joints. In use, the lower pad is placed on the replaced rubber bearing, and then the four lifting screws are rotated to bring the upper pad into contact with the lower surface of the main beam. The device is then removed, and the height of the four corners of the lower and upper pads is measured using calipers. The upper wedge-shaped steel plate is then machined according to the measured corner heights. This solves the problem of limited space under existing bridges making measurement difficult, and the obtained dimensions of the upper wedge-shaped steel plate are accurate, ensuring stable support for the bridge after the replacement of the rubber bearing. Attached Figure Description

[0012] Figure 1 This is a front view of the device of this utility model for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings;

[0013] Figure 2 This is a left view of the device of this utility model for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings;

[0014] Figure 3 This is a right view of the device of the present invention for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings;

[0015] Figure 4 This is a top view of the device for measuring the dimensions of the wedge-shaped steel plate on a bridge rubber bearing after removing the upper pad.

[0016] Figure 5 This is a schematic diagram of the upper pad in this utility model;

[0017] Figure 6 for Figure 1 A magnified view of a portion of region A in the middle;

[0018] Figure 7 This is a schematic diagram illustrating the working principle of the device for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings according to this utility model.

[0019] Figure 8 The diagram shows the structure of the upper wedge-shaped steel plate manufactured using parameters measured by the device of this invention for measuring the size of the wedge-shaped steel plate on a bridge rubber bearing.

[0020] In the diagram: 1. Lower pad, 2. Upper pad, 3. Lifting screw, 4. Threaded hole, 5. Support ball, 6. Universal joint, 7. Hand-tightening screw head, 8. First screw, 9. Second screw, 10. Third screw, 11. Fourth screw, 12. Ball head seat, 13. Universal ball head, 14. Pile foundation, 15. Cap beam, 16. Bearing pad stone, 17. Lower support steel plate, 18. Rubber bearing, 19. Main beam, 20. Upper wedge steel plate. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1 to 4 The diagram shows the front view, left view, right view, and top view after removing the upper pad of the device for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings according to this invention. The measuring device consists of a lower pad 1 and an upper pad 2, both of which are square and made of metal. Each of the four corners of the lower pad 1 has a lifting screw 3, and each corner has a threaded hole 4 that mates with the lifting screw 3. The four lifting screws 3 pass through the four threaded holes 4, i.e., the lifting screws 3 are threadedly engaged with the threaded holes 4. Thus, rotating the lifting screws 3 drives them to rise and fall relative to the lower pad 1. Figure 5The diagram shows a schematic representation of the upper pad in this invention.

[0023] Each lifting screw 3 shown has a hand-tightening screw head 7 fixed at its lower end. The hand-tightening screw head 7 is provided with an ear plate for hand-tightening. The hand-tightening screw head 7 is fixed to the lower end of the lifting screw 3. In this way, the lifting screw 3 can be driven to rotate by rotating the hand-tightening screw head 7. The rotation of the lifting screw 3 can also make it rise and fall relative to the lower pad 1.

[0024] On one side of the lower pad 1 ( Figure 1 On the right side of the upper plate 1, the upper ends of the two lifting screws 3 are fixed with supporting spheres 5. The upper ends of the supporting spheres 5 are in contact with the lower surface of the upper pad 2, that is, the supporting spheres 5 provide support for the lower surface of the upper pad 2; on the other side of the lower pad 1 ( Figure 1 The upper ends of the two lifting screws 3 (on the left side) are hinged to the lower surface of the upper pad 2 via a universal joint 6. The housing of the universal joint 6 is fixed on the lower surface of the upper pad 2, and the free end of the universal joint 6 is fixed to the top of the lifting screw 3.

[0025] like Figure 6 As shown, it gives Figure 1 The enlarged view of area A shows that the universal joint 6 is a spherical universal joint, which consists of a ball joint seat 12 and a universal ball head 13. The ball joint seat 12 forms the housing of the universal joint 6, and the universal ball head 13 forms the free end of the universal joint 6. The ball joint seat 12 is fixed to the lower surface of the upper pad 2, and the universal ball head 13 is fixed to the upper end of the lifting screw 3.

[0026] Since the two lifting screws 3 on one side are hinged to the upper pad plate 2 via the universal joint 6, and the two lifting screws 3 on the other side support the lower surface of the upper pad plate 2 via the support ball 5, the four corners of the upper pad plate 2 can be adjusted to different heights by rotating the lifting screws 3, that is, to different heights when in contact with the main beam 19, so as to determine the required size of the upper wedge steel plate 20.

[0027] like Figure 4 As shown, the four lifting screws 3 are the first screw 8, the second screw 9, the third screw 10 and the fourth screw 11. The top ends of the first screw 8 and the second screw 9 are fixed with supporting light balls 5. The upper ends of the third screw 10 and the fourth screw 11 are connected to the lower surface of the upper pad 2 via universal joints 6.

[0028] like Figure 7The diagram shows the operating principle of the device for measuring the dimensions of the wedge-shaped steel plate on a bridge rubber bearing, as described in this utility model. The cap beam 15 is fixed to the upper end of the pile foundation 14. A support pad 16 is provided on the cap beam 15, and the rubber bearing 18 is placed on the support pad 16. A lower support steel plate 17 is provided at the bottom of the rubber bearing 18, and the lower support steel plate 17 is typically flat. For bridges located on curves, the lower surface of the main beam 19 and the rubber bearing 18 are typically wedge-shaped, requiring a wedge-shaped steel plate to be placed above the rubber bearing 18.

[0029] Therefore, during the replacement of bridge bearings, the main beam 19 is first supported using a hydraulic system. Then, the lower support steel plate 17, rubber bearing 18, and upper support steel plate are removed. Next, the new lower support steel plate 17 and rubber bearing 18 are placed in place. The measuring device of this invention is then placed on the rubber bearing 18, so that the lower surface of the lower pad 1 is placed on the upper surface of the rubber bearing 18. Then, by turning the hand-tightening screw 7 on each lifting screw 3, the four vertices of the upper pad 2 are brought into contact with the lower surface of the upper pad 1. The lower pad 1 and upper pad 2 are then removed. Finally, the height of the four corners of the lower pad 1 and upper pad 2 is measured using a vernier caliper. Figure 8 As shown, the measured heights of the four corners are h1, h2, h3, and h4, respectively. Therefore, based on the measured h1, h2, h3, and h4, the following can be machined: Figure 8 The upper wedge-shaped steel plate 20 shown can be placed above the replaced rubber bearing 18 to achieve a tight fit with the main beam 19, ensuring stable support for the bridge.

Claims

1. A device for measuring the dimensions of a wedge-shaped steel plate on a bridge rubber bearing, comprising a lower pad (1) and an upper pad (2), the upper pad being located above the lower pad; characterized in that: The lower pad is provided with lifting screws (3) at each of the four corners, and threaded holes (4) that are threaded to the lifting screws are provided at each of the four corners of the lower pad. The top ends of the two lifting screws on one side of the lower pad are fixed with supporting light balls (5) that abut against the lower surface of the upper pad. The top ends of the two lifting screws on the other side of the lower pad are hinged to the lower surface of the upper pad via universal joints (6). The housing of the universal joint is fixed on the lower surface of the upper pad, and the free end of the universal joint is fixed to the top end of the lifting screw.

2. The device for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings according to claim 1, characterized in that: The universal joint (6) is a spherical universal joint consisting of a ball head seat (12) and a universal ball head (13). The ball head seat is fixed on the lower surface of the upper pad (2), and the universal ball head is placed in the inner cavity of the ball head seat. The universal ball head is fixedly connected to the top end of the lifting screw (3).

3. The device for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings according to claim 1 or 2, characterized in that: The lower end of the lifting screw (3) is fixed with a hand-tightening screw head (7), and an ear plate is fixed on the hand-tightening screw head.

4. The device for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings according to claim 1 or 2, characterized in that: Both the lower pad (1) and the upper pad (2) are square.

5. The device for measuring the dimensions of wedge-shaped steel plates on bridge rubber bearings according to claim 1 or 2, characterized in that: When in use, the lower pad (1) is placed on the upper surface of the replaced rubber support (18).

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