A welding positioning clamping device for connecting steel plates of I-shaped steel arch frame

Abstract

The present invention discloses a welding positioning clamping device for connecting steel plates of an I-shaped steel arch frame, comprising a first connecting rod, a welding fixture bracket, a positioning pin, a clamping block, a movable limit block, a handle and a second connecting rod. The welding fixture bracket and the movable limit block are connected by a hinge; the two ends of the handle install one end of the first connecting rod on both sides of the top of the fixture bracket through a pin shaft; the other end of the first connecting rod is connected to one end of the second connecting rod, and the other end of the second connecting rod is connected to the movable limit block. This structure can check the hole spacing size of the connecting plate during the welding of the connecting plate, thereby improving the construction quality; the relative position of each finished I-shaped steel arch frame and the connecting plate is the same, and the docking accuracy is improved during the docking process of each step steel arch frame, while ensuring the ring quality of the steel arch frame, the time for adjusting the position of the steel arch frame is reduced, manpower is saved, and the docking efficiency and quality are improved.

Description

Technical Field

[0001] The invention relates to an I-shaped steel arch frame connecting steel plate welding positioning device used for tunnel construction, belonging to the technical field of tunnel excavation and steel arch frame welding. Background Art

[0002] With the rapid development of national construction projects, tunnel engineering and underground engineering have played an increasingly important role in national economic construction. At present, my country mainly uses millisecond blasting and smooth blasting technology for tunnel excavation. After tunnel excavation, in order to control the appropriate release and deformation of surrounding rock stress and increase the safety strength of the structure, initial support is immediately applied.

[0003] During the tunnel construction process, according to the New Austrian Tunnel Construction Method (NATM) tunnel construction principles, the quality of initial support construction determines the overall stability of the tunnel. However, in actual construction, problems are prone to occur in the quality of initial support, such as unqualified I-beam welding quality, misalignment of I-beam reserved bolt holes, and insufficient initial support thickness. Summary of the invention

[0004] The purpose of the present invention is to design an I-beam arch frame connecting steel plate welding positioning clamping device to ensure that when the I-beam is welded, the connecting plate is prevented from being twisted, dislocated, etc., and the welding accuracy is accurate.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is a welding positioning clamping device for connecting steel plates with an I-beam steel arch frame, comprising a first connecting rod 1, a welding fixture bracket 2, a positioning pin 3, a clamping block 4, a movable limit block 5, a handle 6 and a second connecting rod 7.

[0006] The cross-sections of the welding fixture bracket 2 and the movable limit block 5 are both L-shaped structures, and the welding fixture bracket 2 and the movable limit block 5 are connected by a hinge; the middle of the welding fixture bracket 2 and the movable limit block 5 are both steel plate structures, and two positioning pins 3 are welded and fixed on the steel plate structure of the welding fixture bracket 2, and the two positioning pins 3 are arranged in parallel and staggered; the handle 6 is a T-shaped structure, and the two ends of the handle 6 are pins to install one end of the first connecting rod 1 on both sides of the top of the fixture bracket 2; the other end of the first connecting rod 1 is connected to one end of the second connecting rod 7, and the other end of the second connecting rod 7 is connected to the movable limit block 5.

[0007] The positioning pin 3 is used to fix the connecting steel plate welded to the I-shaped steel arch frame.

[0008] The pressing block 4 is welded to the side of the handle 6. The pressing block 4 is a cam structure. The pressing block 4 is directly opposite to the welded I-shaped steel arch frame.

[0009] Furthermore, the movable limit block 5 is used to fix the flange at the bottom of the I-shaped steel arch frame, and the clamping block 4 is used to fix the web at the top of the I-shaped steel arch frame.

[0010] Furthermore, two positioning holes are formed on the connecting steel plate, and the positions of the two positioning holes match the positioning pins 3 .

[0011] Compared with the prior art, the structure designed in the present invention can check the hole spacing of the connecting plate during the welding process of the connecting plate, thereby improving the construction quality; the device is easy to install and operate, thereby improving the efficiency of steel arch frame processing and construction; the finished I-beam of each arch frame is in the same relative position with the connecting plate, and the docking accuracy is improved during the docking process of the steel arch frames at each step. While ensuring the quality of the steel arch frame ring, the time for adjusting the position of the steel arch frame is reduced, manpower is saved, and the docking efficiency and quality are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the clamp open state.

[0013] Figure 2 It is a schematic diagram of the clamping state of the fixture.

[0014] Figure 3 It is a schematic diagram of the front structure of the fixture.

[0015] Figure 4 This is a schematic diagram of the vertical structure of the fixture.

[0016] In the figure, 1 is the first connecting rod, 2 is the welding fixture bracket, 3 is the positioning pin, 4 is the clamping block, 5 is the movable limiting block, 6 is the handle, and 7 is the second connecting rod. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0018] A welding positioning clamping device for connecting steel plates with an I-shaped steel arch frame comprises a first connecting rod 1, a welding fixture bracket 2, a positioning pin 3, a pressing block 4, a movable limiting block 5, a handle 6 and a second connecting rod 7.

[0019] The cross-sections of the welding fixture bracket 2 and the movable limit block 5 are both L-shaped structures, and the welding fixture bracket 2 and the movable limit block 5 are connected by a hinge; the middle of the welding fixture bracket 2 and the movable limit block 5 are both steel plate structures, and two positioning pins 3 are welded and fixed on the steel plate structure of the welding fixture bracket 2, and the two positioning pins 3 are arranged in parallel and staggered; the handle 6 is a T-shaped structure, and the two ends of the handle 6 are pins to install one end of the first connecting rod 1 on both sides of the top of the fixture bracket 2; the other end of the first connecting rod 1 is connected to one end of the second connecting rod 7, and the other end of the second connecting rod 7 is connected to the movable limit block 5.

[0020] The positioning pin 3 is used to fix the connecting steel plate welded to the I-shaped steel arch frame.

[0021] The pressing block 4 is welded to the side of the handle 6. The pressing block 4 is a cam structure. The pressing block 4 is directly opposite to the welded I-shaped steel arch frame.

[0022] Furthermore, the movable limit block 5 is used to fix the flange plate at the bottom of the I-shaped steel arch frame, and the clamping block 4 is used to fix the web plate at the top of the I-shaped steel arch frame.

[0023] Furthermore, two positioning holes are formed on the connecting steel plate, and the positions of the two positioning holes match the positioning pins 3 .

[0024] The process of welding positioning using the above device is as follows:

[0025] S1 draws the center line on the connecting steel plate with a talcum pen, places the connecting steel plate in the welding fixture bracket 2, and completes the preliminary installation and positioning of the connecting steel plate and the welding fixture bracket 2 by matching the positioning holes on the connecting steel plate with the positioning pins 3 during installation.

[0026] S2 uses the steel plate structure of the welding fixture bracket 2 to check whether the surface flatness of the connecting steel plate is qualified. If unqualified, replace the connecting steel plate; if qualified, proceed to S3.

[0027] After the S3 connecting steel plate is initially installed and positioned, the center of the I-shaped steel arch frame end is aligned and supported against the center line of the connecting steel plate to ensure that there is no deviation in the installation. Turn the handle 6, and the handle 6 drives the first connecting rod 1 and the second connecting rod 7 to rotate.

[0028] S4 The first connecting rod 1 drives the clamping block 4 to rotate, and the cam of the clamping block 4 presses against the web position of the top of the I-beam steel arch frame. The second connecting rod 7 drives the movable limit block 5 to rotate, and the movable limit block 5 presses against the flange plate of the I-beam steel arch frame, and at the same time presses the end of the I-beam steel arch frame and the connecting steel plate.

[0029] Spot welding is used between the S5 connecting steel plate and the I-shaped steel arch frame to fix the connecting steel plate and the I-shaped steel arch frame into a whole. Subsequently, the handle 6 is rotated in the opposite direction to separate the positioning clamp from the connecting steel plate, and then the connection between the connecting steel plate and the I-shaped steel arch frame is welded to ensure that the weld is full and defect-free.

[0030] S6 performs positioning welding on each I-shaped steel arch frame in turn to complete the welding connection between the I-shaped steel arch frame and the connecting steel plate.

[0031] When the clamp designed by the present invention is opened, the space is wide, and the connecting steel plate can be easily placed in, and the connecting steel plate is positioned by the positioning pin. After the connecting steel plate and the I-beam are placed in, the handle is pulled, and the handle drives the movable limit block to move to support the I-beam through the connecting rod mechanism, and at the same time, the pressing block is pressed down and linked with the limit block to clamp the I-beam and the connecting block through the self-locking principle.

[0032] The manufacturing process of the welding positioning device for connecting steel plates of steel arch frames is simple and the cost is low. During welding, the connection plates are prevented from twisting and dislocation, and the welding accuracy is accurate. During the welding of the connection plates, the bolt hole spacing of the connection plates is checked, which improves the construction quality. The device is easy to install and operate, which improves the processing and construction efficiency of steel arch frames. The relative position of the finished I-beam and the connection plate of each arch frame is the same. During the docking process of the steel arch frames at each step, the docking accuracy is improved. While ensuring the quality of the steel arch frame ring, the time for adjusting the position of the steel arch frame is reduced, which saves manpower and improves the docking efficiency and quality.

[0033] It should be noted that in the device structure designed by the present invention, a person of ordinary skill in the art can carry out the corresponding construction according to the technical description implemented by the present technology and can achieve the expected technical effect. The description records and describes the principle of the device structure.

Claims

1. A welding positioning method for an I-shaped steel arch connecting steel plate welding positioning clamping device, characterized in that: The process of welding positioning is as follows, S1 draws a center line on the connecting steel plate with a talcum pen, places the connecting steel plate in the welding fixture bracket (2), and completes the preliminary installation and positioning of the connecting steel plate and the welding fixture bracket (2) by matching the positioning holes on the connecting steel plate with the positioning pins (3) during installation; S2 uses the steel plate structure of the welding fixture bracket (2) to check whether the surface flatness of the connecting steel plate is qualified; if it is unqualified, replace the connecting steel plate; if it is qualified, proceed to S3; After the S3 connecting steel plate is initially installed and positioned, the center of the end of the I-shaped steel arch frame is aligned and supported against the center line of the connecting steel plate to ensure that there is no deviation in the installation; the handle (6) is turned, and the handle (6) drives the first connecting rod (1) and the second connecting rod (7) to rotate; S4: the first connecting rod (1) drives the pressing block (4) to rotate, and the cam of the pressing block (4) presses against the web position of the top of the I-shaped steel arch frame; the second connecting rod (7) drives the movable limit block (5) to rotate, and the movable limit block (5) presses against the flange plate of the I-shaped steel arch frame, and at the same time presses the end of the I-shaped steel arch frame against the connecting steel plate; Spot welding is used between the S5 connecting steel plate and the I-shaped steel arch frame to fix the connecting steel plate and the I-shaped steel arch frame into a whole. Subsequently, the handle (6) is rotated in the opposite direction to separate the positioning clamp from the connecting steel plate, and then the connection between the connecting steel plate and the I-shaped steel arch frame is welded to ensure that the weld is full and has no defects. S6 performs positioning welding on each I-shaped steel arch frame in turn to complete the welding connection between the I-shaped steel arch frame and the connecting steel plate; The welding positioning clamping device for implementing the welding positioning method comprises a first connecting rod (1), a welding fixture bracket (2), a positioning pin (3), a pressing block (4), a movable limiting block (5), a handle (6) and a second connecting rod (7); The cross-sections of the welding fixture bracket (2) and the movable limit block (5) are both L-shaped structures, and the welding fixture bracket (2) and the movable limit block (5) are connected by a hinge; the middle of the welding fixture bracket (2) and the movable limit block (5) are both steel plate structures, and two positioning pins (3) are welded and fixed on the steel plate structure of the welding fixture bracket (2), and the two positioning pins (3) are arranged in parallel and staggered rows; the handle (6) is a T-shaped structure, and the two ends of the handle (6) are used to mount one end of the first connecting rod (1) on both sides of the top of the welding fixture bracket (2) through a pin shaft; the other end of the first connecting rod (1) is connected to one end of the second connecting rod (7), and the other end of the second connecting rod (7) is connected to the movable limit block (5); The positioning pin (3) is used to fix the connecting steel plate welded to the I-shaped steel arch frame; The pressing block (4) is welded to the side of the handle (6), the pressing block (4) is a cam structure, and the pressing block (4) faces the welded I-shaped steel arch frame.

2. The welding positioning method of the I-shaped steel arch connecting steel plate welding positioning clamping device according to claim 1 is characterized in that: The movable limit block (5) is used to fix the flange plate at the bottom of the I-shaped steel arch frame, and the clamping block (4) is used to fix the web plate at the top of the I-shaped steel arch frame.

3. The welding positioning method of the I-shaped steel arch connecting steel plate welding positioning clamping device according to claim 1 is characterized in that: The connecting steel plate has two positioning holes, and the positions of the two positioning holes match the positioning pins (3).

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