A reinforcing steel welding and positioning device for tunnel secondary lining construction

Abstract

This utility model discloses a rebar welding positioning device for tunnel secondary lining construction, belonging to the technical field of tunnel construction auxiliary equipment, and solves the problem of inconvenience in the installation and removal of rebars in the prior art. This utility model includes a support body, on which a positioning plate is slidably mounted. The positioning plate is provided with several longitudinal positioning mechanisms and transverse positioning mechanisms. The longitudinal positioning mechanism includes a pair of mounting blocks arranged on the front side of the positioning plate, with a limiting component floating on the mounting block for positioning the longitudinal rebar. The transverse positioning mechanism includes a support block rotatably mounted on the positioning plate, with a clamping mechanism for positioning the transverse rebar. By setting up the longitudinal and transverse positioning mechanisms, the positions of the transverse and longitudinal rebars to be welded are fixed in a rapid positioning manner to facilitate welding, significantly reducing labor intensity, improving the convenience of rebar installation and removal before and after welding, and effectively shortening the overall welding operation cycle.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for tunnel construction, and in particular to a steel bar welding and positioning device for tunnel secondary lining construction. Background Technology

[0002] In the construction of tunnel secondary lining, steel bar welding is a key process to ensure the strength and stability of the structure, and the quality of welding operations is highly dependent on the precise positioning of the steel bars before and during welding.

[0003] During construction, reinforced steel structures are typically designed as a mesh, formed by welding together several transverse and longitudinal reinforcing bars. However, during the laying and welding preparation stages of this mesh structure, to ensure the reinforcing bars do not shift during welding and to guarantee the stability of the welded joints, traditional construction methods often require manually tightening wires at multiple intersections of the reinforcing bars for temporary fixation. This is especially problematic in mountain tunnel secondary lining construction, where the required number of reinforcing bars is enormous due to variations in tunnel cross-sectional dimensions and diverse reinforcing bar types, leading to a surge in the number of intersections. Manually tightening wires at each intersection not only consumes a significant amount of time and increases the labor intensity of workers, but also prolongs the pre-welding preparation and post-welding cleaning processes, indirectly extending the overall welding cycle and failing to meet the dual demands of efficiency and quality in mountain tunnel construction.

[0004] Chinese utility model patent CN220739989U discloses a steel mesh positioning and welding fixture, including a base plate with feet symmetrically fixed to both sides of the bottom. A positioning mechanism is provided on the top of the base plate, comprising a longitudinal positioning component and a transverse positioning component that cooperate with each other. The longitudinal positioning component includes a groove. A pressing rod is fixedly connected to the bottom of a connecting plate, and an arc-shaped plate is fixedly connected to the bottom of the pressing rod. The beneficial effect of this utility model is that, under the action of the positioning mechanism, the longitudinal and transverse steel bars to be welded can be stably fixed, preventing movement during welding and making the steel bars more stable during welding, thus ensuring the quality of steel mesh welding. The structure is simple and highly practical.

[0005] In this solution, the longitudinal and transverse positioning components for positioning the reinforcing bars require the transverse and longitudinal reinforcing bars to be inserted into the placement holes sequentially from one end in an interlacing manner during the positioning process. Finally, the two positioning components are used to fix the transverse and longitudinal reinforcing bars. This results in inconvenient installation and disassembly, which affects the processing efficiency. Utility Model Content

[0006] In view of the shortcomings in the above-mentioned background technology, this utility model proposes a steel bar welding and positioning device for tunnel secondary lining construction, which solves the problem of inconvenience in the installation and removal of steel bars in the prior art.

[0007] The technical solution of this utility model is implemented as follows: A steel bar welding positioning device for tunnel secondary lining construction includes a support body, a positioning plate slidably disposed on the support body, and a plurality of longitudinal positioning mechanisms and transverse positioning mechanisms respectively disposed on the positioning plate; the longitudinal positioning mechanism includes a pair of mounting blocks disposed on the front side of the positioning plate, and a limiting member for positioning the longitudinal steel bar is floatingly disposed on the mounting block; the transverse positioning mechanism includes a support block rotatably disposed on the positioning plate, and a clamping mechanism for positioning the transverse steel bar is disposed on the support block.

[0008] Preferably, the front side of the positioning plate has several placement slots, which are respectively opened between each pair of mounting blocks. The limiting member includes a limiting block that slides on the mounting block, and a spring I is provided between the limiting block and the mounting block. Both the inner and outer sides of the end of the limiting block are provided with ramps.

[0009] Preferably, the positioning plate has connecting shafts on both the left and right sides, and the support block has an L-shaped structure, with one end of the support block rotatably engaged with the connecting shaft; the positioning plate has a limiting plate for engaging with the support block. The limiting plate is threaded with a fastening bolt I, and the end of the support block has a fixing port for abutting and limiting with the fastening bolt I.

[0010] Preferably, the clamping mechanism includes a support rod slidably mounted on the support block, a spring II is provided between the support rod and the support block, and the support rod is fixedly connected to the extrusion block. A ramp is provided at the end face of the extrusion block.

[0011] Preferably, the support body includes two parallel support bars, and at least one pair of U-shaped clips are fixedly installed on the side wall of the positioning plate. The support bars are movably inserted through the openings of the U-shaped clips. Fastening bolts II are threaded onto the U-shaped clips, and the ends of the fastening bolts II engage with the support bars.

[0012] The beneficial effects of this utility model are as follows: By setting longitudinal and transverse positioning mechanisms, the longitudinal and transverse reinforcing bars are positioned and fixed. Furthermore, by setting up installation blocks in pairs and floating limiting components on the installation blocks, the longitudinal reinforcing bars are quickly positioned. By setting up rotatable support blocks and setting up clamping mechanisms on the support blocks to cooperate with the transverse reinforcing bars, the transverse reinforcing bars are quickly positioned. Finally, the transverse and longitudinal reinforcing bars to be welded are fixed in position by means of rapid positioning, so as to carry out welding. This significantly reduces labor intensity, improves the convenience of installing and removing reinforcing bars before and after welding, improves efficiency, and effectively shortens the overall welding operation cycle. Attached Figure Description

[0013] To more clearly illustrate the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a structural diagram of the present invention from a first-view perspective; Figure 2 This is a structural diagram of the present invention from a second perspective; Figure 3 for Figure 2 Enlarged view of the structure of part A in the middle; Figure 4 This is a partial cross-sectional view of the connection structure between the positioning plate and the positioning component one in this utility model; Figure 5 This is a cross-sectional view of the connection structure between the support block and the extrusion component in this utility model; Figure 6 This is a diagram showing the position of the support block after its positioning has been removed in this invention. Figure 7 This is a diagram showing the positioning of the transverse and longitudinal reinforcing bars in this utility model.

[0015] In the diagram: 1. Support body; 2. Positioning plate; 21. Placement groove; 3. Longitudinal positioning mechanism; 31. Mounting block; 32. Limiting component; 321. Spring 1; 322. Limiting block; 4. Lateral positioning mechanism; 41. Connecting shaft; 42. Supporting block; 43. Extrusion component; 431. Spring 2; 432. T-shaped rod; 433. Extrusion block; 5. L-shaped plate; 6. Fastening bolt I; 7. Fixing port; 8. U-shaped block; 9. Fastening bolt II. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1 , 2As shown in Figure 7, Embodiment 1 discloses a rebar welding and positioning device for tunnel secondary lining construction. The device includes a support body 1, on which a positioning plate 2 is slidably mounted. The positioning plate 2 is provided with several longitudinal positioning mechanisms 3 and transverse positioning mechanisms 4. These mechanisms are used to position and fix the longitudinal and transverse rebars. The longitudinal positioning mechanism 3 includes a pair of mounting blocks 31 positioned on the front side of the positioning plate 2. Each mounting block 31 has a floating limiting member 32 for positioning the longitudinal rebar. The transverse positioning mechanism 4 includes a support block 42 rotatably mounted on the positioning plate 2. Each support block 42 has a clamping mechanism 43 for positioning the transverse rebar.

[0018] As a specific implementation plan, in this embodiment, such as Figure 3 , 4 As shown, the front side of the positioning plate 2 is provided with several placement slots 21. The placement slots 21 are used to limit the position of the longitudinal reinforcing bar on the side close to the positioning plate. The placement slots 21 are respectively opened between each pair of mounting blocks 31. The limiting member 32 includes a limiting block 322 that is slidably disposed on the mounting block 31. A spring I 321 is provided between the limiting block 322 and the mounting block 31. Specifically, in this embodiment, a rectangular slot is opened on the mounting block. The limiting block is slidably disposed in the rectangular slot. A spring is provided between one end of the limiting block and the inner wall of the rectangular slot. One end of the limiting block extends out of the rectangular slot. Slopes are provided on both the inner and outer sides of the end of the limiting block 322. Each pair of limiting blocks together limit the position of the longitudinal reinforcing bar on the side away from the positioning plate 2.

[0019] In actual use, during the positioning and installation of longitudinal reinforcing bars, after aligning the longitudinal reinforcing bars, they are pressed into the placement groove 21. The inner side of the longitudinal reinforcing bar first contacts the slope of the corresponding two limiting blocks 322. As the longitudinal reinforcing bar is continuously pressed in, the squeezing force it generates on the slope surface will push the two limiting blocks 322 to slide away from each other, while compressing the spring I 321. When the longitudinal reinforcing bar is completely inserted between the two limiting blocks 322 and pressed into the placement groove 21, the squeezing force disappears. Under the action of the elastic restoring force, the spring I 321 pushes the two limiting blocks 322 to move closer to each other until the inner side or the inner slope of the two limiting blocks 322 contacts the outer wall of the longitudinal reinforcing bar, thereby automatically and stably limiting the longitudinal reinforcing bar in the placement groove 21 without the need for additional manual fixing force, thus improving the convenience of longitudinal reinforcing bar placement and positioning.

[0020] The operator then rotates the support block 42 to open the area to be locked, places the transverse reinforcing bar horizontally outside the longitudinal reinforcing bar, and moves it into the area. Finally, the support block 42 is rotated so that the clamping mechanism 43 on it presses against the outside of the transverse reinforcing bar. The clamping mechanism 43 creates a pushing force on the transverse reinforcing bar towards the longitudinal reinforcing bar, making the transverse reinforcing bar tightly fit against the preset welding position of the longitudinal reinforcing bar, achieving precise alignment of the longitudinal and transverse reinforcing bars, facilitating subsequent welding.

[0021] Example 2, based on Example 1, such as Figure 5 , 6 As shown, to limit the position of the transverse reinforcing bars, connecting shafts 41 are provided on the left and right sides of the positioning plate 2. The support block 42 has an L-shaped structure, and one end of the support block 42 is rotatably engaged with the connecting shaft 41. The clamping mechanism 43 includes a support rod 432 slidably disposed on the support block 42. A spring II 431 is provided between the support rod 432 and the support block 42. The support rod 432 is fixedly connected to the pressing block 433. Specifically, in this embodiment, a circular groove is provided on the support block 42. The support rod passes through the circular groove. A spring II is provided between one end face of the support rod and the inner wall of the circular groove. The outer end of the support rod passes through the annular groove and is fixedly connected to the pressing block. A ramp is provided at the outer end face of the pressing block 433.

[0022] After the longitudinal reinforcement is placed, the operator rotates the support blocks on both sides to open the area where the transverse reinforcement needs to be placed. The transverse reinforcement is then placed outside the longitudinal reinforcement. The two L-shaped support blocks 42 are then rotated in the opposite direction until they are hooked onto the outside of the transverse reinforcement. During placement, the transverse reinforcement first contacts the slope at the outer end of the pressing block 433. As rotation continues, the pressing block moves axially along the support rod under the action of the support rod, compressing the spring II 431. When the outer side of the transverse reinforcement contacts the inner side of the long arm section of the L-shaped support block 42, the spring II 431, under the action of elastic restoring force, pushes the pressing block 433 against the transverse reinforcement through the support rod 432, keeping the transverse reinforcement in contact with the longitudinal reinforcement. At this point, the transverse and longitudinal reinforcements can be welded.

[0023] As a further optional implementation, the positioning plate 2 is provided with a limiting plate 5 for cooperating with the support block 42. A fastening bolt I 6 is threaded onto the limiting plate 5, and the end of the support block 42 is provided with a fixing port 7 for abutting and limiting the position of the fastening bolt I 6. In actual use, the limiting plate 5 is designed as an L-shaped plate. By setting the limiting plate, the rotatable range of the support block can be limited. After clamping the transverse reinforcing bars, the fastening bolt I is rotated, thereby using the end of the fastening bolt to abut against the support block, further locking the position of the support block.

[0024] When new transverse reinforcement needs to be welded or disassembled after welding is completed, the operator first loosens the fastening bolt I6 so that it can be completely removed from the fixing port 7, thus releasing the lock on the support block 42. At this time, the support block 42 is rotated to make it rotate around the connecting shaft 41, thereby separating it from the welded transverse reinforcement and releasing the lock on the transverse reinforcement.

[0025] In Example 3, based on Example 1, the support body 1 includes two parallel support bars, and at least one pair of U-shaped clips 8 are fixedly installed on the side wall of the positioning plate 2. The support bars are movably inserted through the openings of the U-shaped clips 8. Furthermore, to improve stability, the two support bars are welded together and fixed by profile support rods, thereby maintaining parallelism and structural stability.

[0026] In addition, the U-shaped clip 8 is threaded with a fastening bolt II9, the inner end of which mates with the support bar.

[0027] When it is necessary to continue welding new transverse reinforcing bars above the already welded transverse reinforcing bars, the operator can first loosen the fastening bolt I6 so that it can be completely removed from the fixing port 7, releasing the angle lock on the support block 42. At this time, the support block 42 rotates around the connecting shaft 41, thereby separating from the already welded transverse reinforcing bars and making room for the movement of the positioning plate 2. Then, loosen the fastening bolt II9 so that it separates from the outside of the support body 1. Next, push the positioning plate 2 upward along the support body 1 to the welding position of the next transverse reinforcing bar. Then tighten the fastening bolt II9 again so that one end abuts against the outside of the support body 1, locking the new position of the positioning plate 2. Then rotate the support block 42 so that it re-fits the transverse reinforcing bar. Finally, tighten the fastening bolt I6 and reinsert it into the fixing port 7 of the support block 42 to complete the angle lock of the support block 42. Through the above adjustments, new transverse reinforcing bars can be welded.

[0028] This utility model, through the cooperation of the U-shaped block, fastening bolt I and fastening bolt II, allows the height of the positioning plate to be adjusted by sliding up and down along the support body, meeting the welding requirements of transverse reinforcing bars at different positions, and further improving the practicality and reliability of the device in actual construction.

[0029] 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 bar welding and positioning device for tunnel secondary lining construction, characterized in that: The system includes a support body (1), on which a positioning plate (2) is slidably arranged. The positioning plate (2) is provided with several longitudinal positioning mechanisms (3) and transverse positioning mechanisms (4). The longitudinal positioning mechanism (3) includes a pair of mounting blocks (31) arranged on the front side of the positioning plate (2). The mounting block (31) is provided with a limiting member (32) for positioning the longitudinal reinforcement. The transverse positioning mechanism (4) includes a support block (42) rotatably arranged on the positioning plate (2). The support block (42) is provided with a pressing mechanism (43) for positioning the transverse reinforcement.

2. The steel reinforcement welding and positioning device for tunnel secondary lining construction according to claim 1, characterized in that: The front side of the positioning plate (2) is provided with several placement slots (21), which are respectively opened between each pair of mounting blocks (31).

3. The steel reinforcement welding and positioning device for tunnel secondary lining construction according to claim 2, characterized in that: The limiting component (32) includes a limiting block (322) that is slidably disposed on the mounting block (31), and a spring I (321) is provided between the limiting block (322) and the mounting block (31).

4. The steel reinforcement welding and positioning device for tunnel secondary lining construction according to claim 3, characterized in that: The inner and outer sides of the end of the limiting block (322) are provided with ramps.

5. The steel reinforcement welding and positioning device for tunnel secondary lining construction according to any one of claims 1 to 4, characterized in that: The positioning plate (2) is provided with connecting shafts (41) on both the left and right sides. The support block (42) has an L-shaped structure. One end of the support block (42) is rotatably engaged with the connecting shaft (41). The positioning plate (2) is provided with a limiting plate (5) for engaging with the support block (42).

6. The steel reinforcement welding and positioning device for tunnel secondary lining construction according to claim 5, characterized in that: The limiting plate (5) is threaded with a fastening bolt I (6), and the end of the support block (42) is provided with a fixing port (7) for abutting and limiting with the fastening bolt I (6).

7. The steel reinforcement welding and positioning device for tunnel secondary lining construction according to claim 1 or 6, characterized in that: The pressing mechanism (43) includes a support rod (432) slidably disposed on the support block (42), a spring II (431) is provided between the support rod (432) and the support block (42), and the support rod (432) is fixedly connected to the pressing block (433).

8. The steel reinforcement welding and positioning device for tunnel secondary lining construction according to claim 7, characterized in that: A ramp is provided at the end face of the extrusion block (433).

9. The steel reinforcement welding and positioning device for tunnel secondary lining construction according to claim 1 or 8, characterized in that: The support body (1) includes two parallel support bars, and at least one pair of U-shaped clips (8) are fixedly provided on the side wall of the positioning plate (2). The support bars can be moved through the opening of the U-shaped clips (8).

10. The steel reinforcement welding and positioning device for tunnel secondary lining construction according to claim 9, characterized in that: The U-shaped clip (8) is threaded with a fastening bolt II (9), and the end of the fastening bolt II (9) is engaged with the support bar.

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