A two-way accurate positioning and adjusting device for hoisting a steel beam

Abstract

The utility model provides a kind of steel beam hoisting bidirectional accurate positioning adjusting device, it is related to the technical field of bridge steel structure construction, including adjusting assembly, adjusting assembly includes triangular adjusting block, backing plate, adjusting screw, lower adjusting nut and upper adjusting nut, two are symmetrically set in triangular adjusting block, long round hole for passing through adjusting screw is opened in triangular adjusting block, long round hole is compatible with adjusting screw, adjusting screw is sequentially passed through the long round hole of two triangular adjusting blocks, its top end is stretched to the outside of upper triangular adjusting block after and is screw-threaded with upper adjusting nut, its bottom end is stretched to the outside of lower triangular adjusting block after and is screw-threaded with lower adjusting nut;After hoisting, according to the clearance of inserting the three-layer structure backing plate of specific thickness, Y-axis direction positioning can be realized, then by screwing upper adjusting nut and lower adjusting nut, X-axis direction adjusting can be realized using the screw thread transmission of adjusting screw, without welding counterforce frame, greatly simplify operation process.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge steel structure construction, and in particular to a bidirectional precision positioning and adjustment device for steel beam hoisting. Background Technology

[0002] In the existing construction process of bridge steel structures, after the steel box girder segments are hoisted, it is usually necessary to weld reaction frames onto the steel bridge deck and then use jacks and chain hoists to adjust the position of the steel beams. However, this traditional adjustment method has many drawbacks: firstly, it is inefficient, as welding reaction frames is time-consuming and cumbersome; secondly, reaction frames are mostly made on-site using temporary steel plates, which cannot be reused, resulting in material waste. Therefore, it is necessary to provide a bidirectional precise positioning and adjustment device for steel beam hoisting to solve the above technical problems. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a bidirectional precision positioning and adjustment device for steel beam hoisting, which overcomes the problems of low efficiency and serious material waste in traditional steel beam positioning and adjustment methods.

[0004] This utility model provides a bidirectional precision positioning and adjustment device for steel beam hoisting, comprising an adjustment assembly. Two sets of adjustment assemblies are symmetrically arranged. Each adjustment assembly includes a triangular adjustment block, a pad, an adjustment screw, a lower adjustment nut, and an upper adjustment nut. Two triangular adjustment blocks are symmetrically arranged vertically. Each triangular adjustment block has a through-hole for the adjustment screw to pass through, the through-hole being adapted to the adjustment screw. The adjustment screw passes sequentially through the two triangular adjustment blocks' through-holes, its top end extending to the outside of the upper triangular adjustment block and threadedly connected to the upper adjustment nut, and its bottom end extending to the outside of the lower triangular adjustment block and threadedly connected to the lower adjustment nut. The pad includes a middle steel plate layer, an upper steel plate layer, and a lower steel plate layer.

[0005] Preferably, the intermediate steel plate layer is disposed at the bottom of the upper steel plate layer, and the lower steel plate layer is disposed at the bottom of the intermediate steel plate layer, wherein both the upper and lower steel plate layers are stainless steel plates.

[0006] Preferably, a lubricating oil layer is applied between the contact surfaces of the triangular adjusting block and the upper and lower steel plate layers.

[0007] Preferably, the triangular adjusting block is made of steel, and the cross-section of the triangular adjusting block is an isosceles triangle.

[0008] Preferably, the lubricating oil layer is a grease layer.

[0009] Preferably, the triangular adjusting block is welded to the top plate of the steel beam during the factory pre-assembly stage.

[0010] Compared with related technologies, the bidirectional precision positioning and adjustment device for steel beam hoisting provided by this utility model has the following beneficial effects:

[0011] 1. After hoisting, insert a three-layer structural pad of a specific thickness according to the gap to achieve Y-axis positioning. Then, by turning the upper and lower adjusting nuts, the X-axis adjustment can be achieved by using the thread transmission of the adjusting screw. There is no need to weld the reaction frame, which greatly simplifies the operation process and efficiently completes the bidirectional precise positioning of the steel beam hoisting and positioning stage.

[0012] 2. The pads, adjusting screws, lower adjusting nuts, and upper adjusting nuts in the device are all standardized components that can be reused multiple times, avoiding the material waste caused by the temporary fabrication of traditional reaction frames and significantly reducing construction costs.

[0013] 3. The triangular adjustment block is made of steel with an isosceles triangle cross-section, ensuring structural stability. It is precisely welded to the top plate of the steel beam during the pre-assembly stage in the factory, providing reliable support for adjustment. The upper and lower steel plates of the pad are made of 2mm thick stainless steel, which is corrosion-resistant and has suitable strength. The middle steel plate provides effective support. The three-layer structure ensures accurate thickness and guarantees the positioning accuracy in the Y-axis direction.

[0014] 4. The lubricating oil layer on the contact surface between the triangular adjusting block and the pad can reduce friction, making the adjustment process smoother and avoiding the impact on positioning accuracy due to excessive frictional resistance.

[0015] 5. This device is easy to operate and reusable. It can efficiently complete the bidirectional precise positioning of steel beams during the hoisting and placement stage, significantly improving construction efficiency and quality, reducing material costs, and is suitable for widespread application. Attached Figure Description

[0016] Figure 1 This is an overall layout diagram of a bidirectional precision positioning and adjustment device for steel beam hoisting according to this utility model.

[0017] Figure 2 This is a detailed drawing of the pad plate of a bidirectional precision positioning and adjustment device for steel beam hoisting according to this utility model.

[0018] The following are the labels in the diagram: 1. Triangular adjusting block; 2. Pad plate; 201. Middle steel plate layer; 202. Upper steel plate layer; 203. Lower steel plate layer; 3. Adjusting screw; 4. Lower adjusting nut; 5. Upper adjusting nut; 6. Lubricating oil layer. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Example 1

[0021] Please refer to the following: Figures 1 to 2A bidirectional precision positioning and adjustment device for steel beam hoisting includes an adjustment assembly. Two sets of adjustment assemblies are symmetrically arranged. The adjustment assembly includes a triangular adjustment block 1, a pad 2, an adjustment screw 3, a lower adjustment nut 4, and an upper adjustment nut 5. Two triangular adjustment blocks 1 are symmetrically arranged vertically. An elongated hole for the adjustment screw 3 to pass through is opened through the triangular adjustment block 1. The adjustment screw 3 passes through the elongated holes of the two triangular adjustment blocks 1 in sequence. One end of the elongated hole coincides with the midpoint of one of the short sides of the triangular adjustment block 1, and the other end coincides with the midpoint of the long side of the triangular adjustment block 1. The top end of the screw 3 extends to the outside of the upper triangular adjustment block 1 and is threadedly connected to the upper adjustment nut 5. The bottom end extends to the outside of the lower triangular adjustment block 1 and is threadedly connected to the lower adjustment nut 4. The pad 2 includes a middle steel plate layer 201, an upper steel plate layer 202, and a lower steel plate layer 203.

[0022] In the above, the two sets of adjustment components can coordinately adjust the steel beam from both sides to improve the stability of the adjustment. The upper and lower triangular adjustment blocks 1 form a balanced adjustment fulcrum, and the elongated holes provided by them provide movement space for the adjustment screw 3, ensuring that the screw can move smoothly when adjusting in the X-axis direction. The threaded connection between the adjustment screw 3 and the upper adjustment nut 5 and the lower adjustment nut 4 realizes the transmission of force through the threaded transmission, thereby driving the triangular adjustment blocks 1 to move the steel beam, providing power for precise adjustment in the X-axis direction. The thickness of the middle steel plate layer 201 in the pad 2 can be flexibly selected according to actual needs. The upper steel plate layer 202 and the lower steel plate layer 203 are fixedly connected to the middle steel plate layer 201, providing thickness support that can be flexibly adapted according to the gap for positioning in the Y-axis direction.

[0023] Furthermore, the triangular adjustment block 1 is made of steel, and its cross-section is an isosceles triangle.

[0024] In the above, the triangular adjusting block 1 is made of steel. Utilizing the high strength and high rigidity of steel, it is ensured that it is not easily deformed when subjected to pressure and thrust during the adjustment process, and can stably transmit the adjusting force, providing reliable structural support for the entire adjusting device.

[0025] Furthermore, the triangular adjustment block 1 is welded to the top plate of the steel beam during the factory pre-assembly stage.

[0026] In the above, welding the triangular adjustment block 1 during the factory pre-assembly stage can be achieved with the help of the factory's high-precision measuring instruments and standardized welding process, ensuring that the welding position error of the triangular adjustment block 1 is smaller, and providing a precise benchmark for subsequent on-site adjustment.

[0027] Example 2

[0028] For further details, please refer to [link / reference]. Figures 1 to 2Based on Embodiment 1, the intermediate steel plate layer 201 is disposed at the bottom of the upper steel plate layer 202, and the lower steel plate layer 203 is disposed at the bottom of the intermediate steel plate layer 201. The thickness of both the upper steel plate layer 202 and the lower steel plate layer 203 is 2mm, and both the upper steel plate layer 202 and the lower steel plate layer 203 are stainless steel plates.

[0029] In the above, the middle steel plate layer 201 of the pad 2 serves as the main support layer, and its thickness can be adjusted according to the required Y-axis clearance, providing a basic thickness for positioning. The upper steel plate layer 202 and the lower steel plate layer 203, made of 2mm thick stainless steel, have the advantages of strong corrosion resistance, adaptability to the outdoor environment of bridge construction, and extended service life of the pad 2. On the other hand, the 2mm thickness ensures the flatness of the contact surface with the triangular adjustment block 1, reducing the positioning error in the Y-axis direction caused by uneven thickness. The combination of the three-layer structure enables the pad 2 to meet the strength requirements and have good adaptability and durability.

[0030] Furthermore, a lubricating oil layer 6 is applied between the contact surfaces of the triangular adjusting block 1 and the upper steel plate layer 202 and the lower steel plate layer 203.

[0031] In the above, the lubricating oil layer 6 is filled between the upper steel plate layer 202 and the lower steel plate layer 203 of the triangular adjusting block 1 and the pad 2, which can significantly reduce the friction coefficient of the contact surface between the two, making the relative movement when inserting into the pad 2 in the Y-axis direction or adjusting in the X-axis direction smoother, avoiding adjustment difficulties or component wear due to excessive frictional resistance. At the same time, the lubricating oil layer 6 can also reduce the direct wear of the contact surface and protect the surface accuracy of the triangular adjusting block 1 and the pad 2.

[0032] Furthermore, the lubricating oil layer 6 is a grease layer.

[0033] In the above, grease is selected as the lubricating oil layer 6 because it has good adhesion and can be stably attached to the contact surface between the triangular adjusting block 1 and the pad 2. It is not easily washed away due to vibration, movement or environmental factors such as rain, and can maintain the lubrication effect for a long time.

[0034] In practical applications:

[0035] Step 1: Pre-assembly is carried out in the factory. The steel beam segments to be installed are placed on a special pre-assembly jig. The welding coordinates of the four triangular adjustment blocks 1 are accurately determined according to the design drawings using high-precision measuring instruments. Welding operations are carried out using automatic welding equipment or certified professional welders. Process parameters such as welding current, voltage and welding speed are strictly controlled to complete the precise welding of the triangular adjustment blocks 1.

[0036] Step Two: On-site Measurement and Verification during hoisting. After the steel beam is hoisted to the vicinity of the designed bridge location, the surveyors use measuring instruments of the same precision to verify the following parameters: the preliminary positioning coordinates of the steel beam X, Y, and Z axes, the installation gaps and bevel gaps between segments, the elevation, and the axis deviation. The measurement data is then compiled and fed back to the on-site technical supervisor as the basis for subsequent adjustments.

[0037] Step 3: Based on the verification data from Step 2, calculate the required thickness of the pad 2, and select the corresponding specification pad 2 from the material library. The pad 2 consists of a three-layer structure: a middle steel plate layer 201, an upper steel plate layer 202 with a thickness of 2mm, and a lower steel plate layer 203. Before installation, clean the surface of the pad 2 and check its flatness and dimensional accuracy. The construction personnel insert the pad 2 into the reserved gap between the triangular adjustment block 1 and the bottom plate of the steel beam, ensuring that: the installation direction is correct, it fits tightly with the triangular adjustment block 1 and the bottom plate of the steel beam, and the contact surface is evenly coated with grease to form a lubricating oil layer 6 to reduce the coefficient of friction.

[0038] Step 4: Install and adjust the adjusting screw 3, lower adjusting nut 4, and upper adjusting nut 5. Check the integrity of the thread of the adjusting screw 3 and apply grease evenly to its thread surface. Pass the adjusting screw 3 through the elongated hole of the triangular adjusting block 1, ensuring that the lengths of the screw protruding from both ends are symmetrical. Install the upper adjusting nut 5 and lower adjusting nut 4, and manually pre-tighten them until they fit snugly with the adjusting screw 3. When adjusting on one side: tighten the lower adjusting nut 4 and upper adjusting nut 5 on one side and observe whether the adjusting screw 3 moves smoothly without any jamming. When adjusting on both sides: tighten the lower adjusting nut 4 and upper adjusting nut 5 on both sides simultaneously and check whether the steel beam moves smoothly as a whole. If any abnormality is found, stop the machine immediately for inspection and troubleshooting.

[0039] Step 5: When adjusting the X-axis position of a single steel beam, tighten the upper adjusting nut 5 and the lower adjusting nut 4 on that side. Utilize the threaded transmission principle to drive the triangular adjusting block 1, causing a slight displacement of the steel beam until the designed position is reached. When adjusting both sides, if the X-axis position of both steel beams needs to be adjusted simultaneously, apply the same direction and force to the upper adjusting nut 5 and the lower adjusting nut 4 on both sides to ensure consistent displacement on both sides and maintain the structural symmetry of the steel beam.

[0040] The working principle of the bidirectional precision positioning and adjustment device for steel beam hoisting provided by this utility model is as follows:

[0041] After the steel beam is hoisted to near the design position, based on the segment installation gaps and bevel gaps measured on site, a shim plate 2 of corresponding thickness is selected and inserted between the upper and lower symmetrical triangular adjusting blocks 1. The three-layer structure of the shim plate 2 (the middle steel plate layer 201 provides support, and the upper steel plate layer 202 and lower steel plate layer 203 are corrosion resistant) limits the displacement of the triangular adjusting blocks 1 in the Y-axis direction through its own thickness. At the same time, the lubricating oil layer 6 on the contact surface between the triangular adjusting blocks 1 and the shim plate 2 reduces friction, ensuring that the shim plate 2 is accurately inserted, thereby completing the positioning of the steel beam in the Y-axis direction; X-axis direction... During the adjustment process, for minor displacement adjustments of a single steel beam, only the lower adjusting nut 4 and the upper adjusting nut 5 on that side need to be turned. Through the threaded transmission principle, the steel beam is pushed to move slightly along the X-axis until the precise design position is reached. If it is necessary to adjust the X-axis position of both steel beams simultaneously, the lower adjusting nut 4 and the upper adjusting nut 5 on both sides can be turned in the same direction and with the same force to achieve coordinated displacement of both steel beams. This enables bidirectional adjustment of the steel beams in both the X-axis and Y-axis directions, ensuring the symmetry and stability of the entire steel beam structure.

[0042] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A bidirectional precision positioning and adjustment device for steel beam hoisting, characterized in that, The system includes an adjustment assembly, which is symmetrically arranged in two sets. The adjustment assembly includes a triangular adjustment block (1), a pad (2), an adjustment screw (3), a lower adjustment nut (4), and an upper adjustment nut (5). There are two triangular adjustment blocks (1) arranged symmetrically up and down. The triangular adjustment block (1) has an elongated hole through which the adjustment screw (3) passes. The adjustment screw (3) passes through the elongated holes of the two triangular adjustment blocks (1) in sequence. Its top end extends to the outside of the upper triangular adjustment block (1) and is threaded to the upper adjustment nut (5). Its bottom end extends to the outside of the lower triangular adjustment block (1) and is threaded to the lower adjustment nut (4). The pad (2) includes an intermediate steel plate layer (201), an upper steel plate layer (202), and a lower steel plate layer (203).

2. The bidirectional precision positioning and adjustment device for steel beam hoisting according to claim 1, characterized in that, The intermediate steel plate layer (201) is located at the bottom of the upper steel plate layer (202), and the lower steel plate layer (203) is located at the bottom of the intermediate steel plate layer (201). Both the upper steel plate layer (202) and the lower steel plate layer (203) are stainless steel plates.

3. The bidirectional precision positioning and adjustment device for steel beam hoisting according to claim 1, characterized in that, A lubricating oil layer (6) is applied between the contact surfaces of the triangular adjusting block (1) and the upper steel plate layer (202) and the lower steel plate layer (203).

4. The bidirectional precision positioning and adjustment device for steel beam hoisting according to claim 1, characterized in that, The triangular adjustment block (1) is made of steel, and the cross-section of the triangular adjustment block (1) is an isosceles triangle.

5. The bidirectional precision positioning and adjustment device for steel beam hoisting according to claim 3, characterized in that, The lubricating oil layer (6) is a grease layer.

6. The bidirectional precision positioning and adjustment device for steel beam hoisting according to claim 1, characterized in that, The triangular adjustment block (1) is welded to the top plate of the steel beam during the factory pre-assembly stage.

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