Steel box girder elevation measuring instrument

Abstract

This utility model discloses a steel box girder elevation measuring instrument, relating to the field of steel box girders. It includes a column, a top plate fixedly mounted on the top of the column, a measuring instrument mounted on the top surface of the top plate, a connecting plate mounted on the outer circumference of the column, multiple slots spaced apart on the periphery of the connecting plate, a rotating shaft with both ends rotatably connected to the side walls of the slots, a support rod fixedly mounted on the rotating shaft, a support plate mounted at the bottom of the support rod, and a torsion spring fitted onto the rotating shaft. One end of the torsion spring is fixedly connected to the slot, and the other end is fixedly connected to the support rod. In this utility model, the multiple support rods, in conjunction with the support plate, can adaptively adjust to the uneven ground conditions of the construction site. The support rods can rotate flexibly under the action of the torsion spring, allowing the support plate to better conform to the ground, providing stable support for the column and measuring instrument, and effectively reducing instrument tilting or swaying caused by uneven ground.

Description

Technical Field

[0001] This utility model relates to the field of steel box girders, and in particular to a steel box girder elevation measuring instrument. Background Technology

[0002] With the continuous advancement of transportation infrastructure construction, bridge engineering, as a key element connecting geographical spaces and promoting regional economic development, is increasingly characterized by its scale and complexity. Steel box girders, with their superior mechanical properties, excellent spanning capacity, and relatively fast construction speed, have been widely used in the construction of long-span bridges. Accurate measurement of the steel box girder elevation is a crucial step in the construction of long-span steel box girder bridges.

[0003] Within the construction site, various vehicles and large equipment frequently operate, and the strong vibrations they generate inevitably affect the operational stability of measuring instruments. Measuring instruments are typically extremely sensitive to vibration; even minute vibrations can lead to deviations in measurement data. During the operation of vehicles and large equipment, vibrations transmitted from the ground can cause shaking or displacement of critical components such as the optical system and sensors of measuring instruments, thereby affecting the accuracy and reliability of measurements.

[0004] Furthermore, the terrain at construction sites is often very complex, with uneven surfaces. This poses a significant challenge to the placement of measuring instruments. Finding a suitable location on uneven ground is difficult. Even with adjustments using shims or similar methods, it's challenging to guarantee the levelness and stability of the measuring instruments. Uneven ground can also cause the instruments to tilt or wobble during use, further affecting the measurement results. Utility Model Content

[0005] In view of this, the present invention aims to provide a steel box girder elevation measuring instrument to solve the problems in the prior art.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] This utility model proposes a steel box girder elevation measuring instrument, including a column, a top plate fixedly installed on the top of the column, a measuring instrument installed on the top surface of the top plate, a connecting plate installed on the outer circumference of the column, a plurality of slots spaced apart on the periphery of the connecting plate, a rotating shaft with both ends rotatably connected to the side walls of the slots, a support rod fixedly installed on the rotating shaft, a support plate installed at the bottom end of the support rod, and a torsion spring fitted on the rotating shaft, one end of the torsion spring being fixedly connected to the slots and the other end being fixedly connected to the support rod;

[0008] The support rod has an inner groove, a rotating rod is fixedly installed in the inner groove, an insert rod is inserted in the inner groove, and a sliding groove is provided in the insert rod, with the rotating rod slidably connected in the sliding groove.

[0009] Furthermore, a fixing sleeve is fixedly provided on the top of the connecting plate, the fixing sleeve is fitted onto the column, the connecting plate is slidably connected to the column, a plurality of through holes are spaced apart on the column, and a pin is inserted into the fixing sleeve, the pin being inserted into the through hole for connection.

[0010] Furthermore, a connecting assembly is provided between the support plate and the support rod. The connecting assembly includes a connecting part and a connecting ball. The connecting part is fixedly connected to the bottom end of one end of the support rod, and the other end is fixedly connected to the connecting ball. The connecting ball is movably connected to the top of the support plate.

[0011] Furthermore, a plurality of second springs are provided at intervals within the inner groove.

[0012] Furthermore, a pull ring is fixedly provided at the top end of the insertion rod.

[0013] Furthermore, the bottom end of the insertion rod is fixedly provided with a pointed end.

[0014] Furthermore, the bottom end of the column is provided with a buffer assembly, which includes a base column, a base plate, and a first spring. The base column is slidably connected to the bottom of the column, the base plate is fixedly installed at the bottom of the base column, and the first spring is fitted on the base column. One end of the first spring is fixedly connected to the column, and the other end is fixedly connected to the base plate.

[0015] Furthermore, a wavy friction plate is fixedly provided on the bottom surface of the support plate.

[0016] Furthermore, the top surface of the top plate is fixedly provided with an installation groove, the measuring instrument is installed in the installation groove, and multiple fixing nuts are screwed to both sides of the installation groove, with the ends of the fixing nuts abutting against the measuring instrument.

[0017] Furthermore, baffles are symmetrically fixed on the front side of the mounting groove.

[0018] Compared with the prior art, this utility model has the following advantages:

[0019] In this invention, multiple support rods working in conjunction with a support plate allow for adaptive adjustment based on the uneven ground conditions of the construction site. The support rods can rotate flexibly under the action of torsion springs, allowing the support plate to better conform to the ground, providing stable support for the column and measuring instrument. This effectively reduces instrument tilting or swaying caused by uneven ground, thereby improving the accuracy and reliability of steel box girder elevation measurement. Attached Figure Description

[0020] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the connecting plate structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the insertion rod structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the rotating shaft and torsion spring structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the rotating rod and sliding groove structure of this utility model;

[0026] Figure 6 This is a schematic diagram of the friction plate structure of this utility model;

[0027] Figure 7 This is a schematic diagram of the mounting groove structure of this utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Column; 101. Perforation; 102. Base column; 103. Base plate; 104. First spring; 2. Connecting plate; 201. Fixing sleeve; 202. Slot; 3. Pin; 4. Rotating shaft; 401. Torsion spring; 5. Support rod; 501. Inner groove; 502. Second spring; 503. Connecting part; 504. Connecting ball; 505. Support plate; 506. Friction plate; 6. Insert rod; 601. Slide groove; 602. Pull ring; 603. Tip; 604. Rotating rod; 7. Top plate; 8. Mounting groove; 801. Fixing nut; 802. Baffle. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "back," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0033] The following will refer to the appendix. Figures 1 to 7 The present invention will be described in detail with reference to the embodiments.

[0034] Overall, this embodiment proposes a steel box girder elevation measuring instrument, including a column 1, a top plate 7 fixedly installed on the top of the column 1, a measuring instrument installed on the top surface of the top plate 7, a connecting plate 2 installed on the outer circumference of the column 1, multiple slots 202 spaced apart on the periphery of the connecting plate 2, a rotating shaft 4 with both ends rotatably connected to the two side walls of the slots 202 respectively, a support rod 5 fixedly installed on the rotating shaft 4, a support plate 505 installed at the bottom of the support rod 5, and a torsion spring 401 fitted on the rotating shaft 4. One end of the torsion spring 401 is fixedly connected to the slots 202, and the other end is fixedly connected to the support rod 5. The support rod 5 has an inner groove 501, a rotating rod 604 is fixedly installed in the inner groove 501, an insert rod 6 is inserted in the inner groove 501, and a sliding groove 601 is opened in the insert rod 6, and the rotating rod 604 is slidably connected in the sliding groove 601.

[0035] In this embodiment, multiple support rods 5, in conjunction with a support plate 505, can adaptively adjust to the uneven ground conditions of the construction site. The support rods 5 can rotate flexibly under the action of the torsion spring 401, allowing the support plate 505 to better conform to the ground, providing stable support for the column 1 and the measuring instrument. This effectively reduces instrument tilting or swaying caused by uneven ground, thereby improving the accuracy and reliability of steel box girder elevation measurement.

[0036] The elasticity of torsion spring 401 can buffer vibrations transmitted from the ground. When vehicles and large equipment vibrate, torsion spring 401 can absorb some of the vibration energy, reduce the impact of vibration on key components of the measuring instrument, further ensure the operational stability of the measuring instrument, and ensure the accuracy of the measurement data.

[0037] The insertion rod 6 is rotatable and telescopically adjustable. By finding a suitable support point and inserting it downwards to the bottom surface, it can provide support and limit the support rod 5, further improving the stability of the measuring instrument in complex construction sites.

[0038] In practice, the steel box girder elevation measuring instrument is moved to the measurement location. Since the support rod 5 is in a freely rotatable state under the action of the torsion spring 401, and the insertion rod 6 can slide within the inner groove 501, when the measuring instrument is placed on the ground, the support rod 5 will automatically adjust its angle according to the ground's undulations. The support plate 505 first contacts the ground; uneven parts of the ground will cause the support rod 5 to rotate around the pivot 4 to adapt to changes in ground height. Subsequently, the adjusted angle of the insertion rod 6 drives it to slide downwards, inserting into the bottom surface to form a support point.

[0039] It should be noted that, for easy height adjustment, such as Figure 2 As shown, in this embodiment, a fixing sleeve 201 is fixedly provided on the top of the connecting plate 2. The fixing sleeve 201 is fitted onto the column 1. The connecting plate 2 and the column 1 are slidably connected. A plurality of through holes 101 are spaced apart on the column 1. A pin 3 is inserted into the fixing sleeve 201. The pin 3 is inserted into the through hole 101 for connection.

[0040] When the measuring instrument height needs to be adjusted according to measurement requirements, the measuring personnel first grasp the pin 3 and pull it out of the fixing sleeve 201 and the current through hole 101. At this time, the fixing state between the connecting plate 2 and the column 1 is released, and the connecting plate 2 can slide freely on the column 1. After the connecting plate 2 is moved to the required height, the measuring personnel align the pin 3 with the through hole 101 corresponding to that height and slowly insert it. During the insertion process, it is necessary to ensure that the pin 3 completely passes through the fixing sleeve 201 and the through hole 101, so that the connecting plate 2 and the column 1 are firmly fixed again.

[0041] Based on the above settings, such as Figure 3 As shown, a connecting assembly is provided between the support plate 505 and the support rod 5. The connecting assembly includes a connecting part 503 and a connecting ball 504. One end of the connecting part 503 is fixedly connected to the bottom end of the support rod 5, and the other end is fixedly connected to the connecting ball 504. The connecting ball 504 is movably connected to the top of the support plate 505.

[0042] In this embodiment, the connecting ball 504 is movably connected to the top of the support plate 505, allowing the support plate 505 to rotate flexibly at multiple angles around the connecting ball 504. When facing complex and varied terrain at the construction site, regardless of whether the ground is inclined, undulating, or has irregular protrusions or depressions, the support plate 505 can automatically adjust its angle through its own rotation, always maintaining a close fit with the ground.

[0043] Continue as Figure 3 As shown, in this preferred embodiment, a plurality of second springs 502 are spaced apart within the inner groove 501. This configuration further absorbs and buffers vibration energy. When vibration is transmitted to the support rod 5, the second springs 502 undergo elastic deformation, converting the vibration energy into the elastic potential energy of the spring.

[0044] To facilitate the operator's adjustment of the insertion rod 6, in this embodiment, as follows: Figure 3 As shown, a pull ring 602 is fixedly provided at the top of the insertion rod 6. In addition, a pointed part 603 is fixedly provided at the bottom of the insertion rod 6, which allows the insertion rod 6 to be better inserted into the bottom surface.

[0045] It needs to be further explained that, such as Figure 2 As shown, the bottom of the column 1 is provided with a buffer assembly, which includes a bottom column 102, a bottom plate 103, and a first spring 104. The bottom column 102 is slidably connected to the bottom of the column 1, the bottom plate 103 is fixedly installed at the bottom of the bottom column 102, and the first spring 104 is fitted on the bottom column 102. One end of the first spring 104 is fixedly connected to the column 1, and the other end is fixedly connected to the bottom plate 103.

[0046] When the measuring instrument is placed on the ground, if there are local bumps on the ground or if there is a certain impact force during the placement process, the base column 102 will slide relative to the column 1 when it is impacted. The first spring 104 will be compressed to absorb the impact energy, reduce the direct impact on the overall structure of the measuring instrument, and avoid damage to the measuring instrument components or affect the accuracy due to instantaneous impact force.

[0047] Furthermore, such as Figure 6 As shown, a wave-shaped friction plate 506 is fixedly provided on the bottom surface of the support plate 505. When the wave-shaped friction plate 506 contacts the ground, its unique wave shape increases the contact area and friction force with the ground.

[0048] To facilitate the installation of the measuring instrument, in this embodiment, as follows: Figure 7 As shown, the top surface of the top plate 7 is fixedly provided with an installation groove 8, and the measuring instrument is set in the installation groove 8. Multiple fixing nuts 801 are screwed to both sides of the installation groove 8, and the ends of the fixing nuts 801 abut against the measuring instrument.

[0049] In practice, the measuring instrument is installed in the mounting slot 8. By tightening the fixing nut 801, sufficient pressure is generated to firmly fix the measuring instrument in the mounting slot 8, preventing the measuring instrument from loosening or shifting due to vibration, external force collision or other reasons during the measurement process, and ensuring that the measuring instrument is always in a stable working state.

[0050] In addition, baffles 802 are symmetrically fixed on the front side of the mounting slot 8. At the construction site, the measuring instrument is susceptible to accidental damage. Dust, sand, and other debris may be present at the construction site. The baffles 802 can prevent these debris from entering the mounting slot 8, avoiding accumulation around the measuring instrument or entering its interior, thus preventing damage to the normal operation and measurement accuracy of the measuring instrument.

[0051] The measuring instrument can be a laser rangefinder, level, etc., and the choice is made according to the actual situation. No further restrictions are made here.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A steel box girder elevation measuring instrument, characterized in that: The device includes a column (1), a top plate (7) fixedly installed on the top of the column (1), a measuring instrument installed on the top surface of the top plate (7), a connecting plate (2) installed on the outer circumference of the column (1), a plurality of slots (202) spaced apart on the periphery of the connecting plate (2), a rotating shaft (4) whose two ends are respectively rotatably connected to the two side walls of the slots (202), a support rod (5) fixedly installed on the rotating shaft (4), a support plate (505) installed at the bottom end of the support rod (5), and a torsion spring (401) fitted on the rotating shaft (4). One end of the torsion spring (401) is fixedly connected to the slot (202), and the other end is fixedly connected to the support rod (5). The support rod (5) has an inner groove (501), a rotating rod (604) is fixedly installed in the inner groove (501), an insert rod (6) is inserted in the inner groove (501), a sliding groove (601) is opened in the insert rod (6), and the rotating rod (604) is slidably connected in the sliding groove (601).

2. The steel box girder elevation measuring instrument according to claim 1, characterized in that: The top of the connecting plate (2) is fixedly provided with a fixing sleeve (201), the fixing sleeve (201) is fitted on the column (1), the connecting plate (2) is slidably connected to the column (1), the column (1) is provided with a plurality of through holes (101) spaced apart, the fixing sleeve (201) is fitted with a pin (3), and the pin (3) is inserted into the through hole (101) for connection.

3. The steel box girder elevation measuring instrument according to claim 1, characterized in that: A connecting assembly is provided between the support plate (505) and the support rod (5). The connecting assembly includes a connecting part (503) and a connecting ball (504). The connecting part (503) is fixedly connected to the bottom end of the support rod (5) at one end, and the other end is fixedly connected to the connecting ball (504). The connecting ball (504) is movably connected to the top of the support plate (505).

4. The steel box girder elevation measuring instrument according to claim 1, characterized in that: Multiple second springs (502) are spaced apart inside the inner groove (501).

5. The steel box girder elevation measuring instrument according to claim 1, characterized in that: A pull ring (602) is fixedly provided at the top of the insertion rod (6).

6. The steel box girder elevation measuring instrument according to claim 1, characterized in that: The bottom end of the insertion rod (6) is fixedly provided with a pointed part (603).

7. The steel box girder elevation measuring instrument according to claim 1, characterized in that: The bottom end of the column (1) is provided with a buffer assembly, which includes a bottom column (102), a bottom plate (103), and a first spring (104). The bottom column (102) is slidably connected to the bottom of the column (1), the bottom plate (103) is fixedly installed at the bottom of the bottom column (102), and the first spring (104) is fitted on the bottom column (102). One end of the first spring (104) is fixedly connected to the column (1), and the other end is fixedly connected to the bottom plate (103).

8. The steel box girder elevation measuring instrument according to claim 1, characterized in that: The bottom surface of the support plate (505) is fixed with a wavy friction plate (506).

9. The steel box girder elevation measuring instrument according to claim 1, characterized in that: The top surface of the top plate (7) is fixedly provided with an installation groove (8), and the measuring instrument is set in the installation groove (8). Multiple fixing nuts (801) are screwed on both sides of the installation groove (8), and the ends of the fixing nuts (801) abut against the measuring instrument.

10. A steel box girder elevation measuring instrument according to claim 9, characterized in that: The mounting groove (8) is symmetrically fixed with baffles (802) on the front side.

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