Steel arch support welding tool for tunnel support

Abstract

This utility model relates to the field of tunnel arch frame technology, specifically disclosing a welding fixture for steel arch frames used in tunnel support. The fixture includes a base, a displacement groove at the top of the base, a transmission screw connected to the middle of the displacement groove, a stop block connected to the middle of the displacement groove, a rotating disk at the top of the base, a deflection groove at the middle of the rotating disk, a deflection rod connected to the deflection groove, a retraction rod connected to the top of the deflection rod, a fitting block connected to the top of the retraction rod, lifting blocks connected to both sides of the retraction rod, and limiting components connected to both sides of the inner wall of the middle of the deflection rod. The limiting components retract along the groove by being compressed by the displacement of the lifting blocks. By using this device, the deflection rod deflects on the rotating disk, expanding to support arch frames of different specifications. This allows one end of the steel plate for welding the arch frame to be suspended on one side for easier welding.

Description

Technical Field

[0001] This utility model relates to the field of tunnel arch frame technology, and more specifically, to a welding fixture for steel arch frames used in tunnel support. Background Technology

[0002] A tunnel arch is a semi-circular support structure used in tunnel excavation to support the inner wall of the excavated tunnel. When existing arches are installed in tunnels, they are manufactured in sections and then connected in the tunnel. A connecting steel plate is welded to one end of each arch section to connect the sections.

[0003] However, when welding steel plates, the existing arch frames can only be placed on a platform by hoisting due to their weight. However, different sizes of arch frames result in different curvatures, making it impossible for the platform to accommodate arch frames of different sizes and curvatures. This causes the arch frames to be partially suspended due to incomplete fit, making them unstable and prone to wobbling, thus affecting the efficiency and accuracy of welding. Utility Model Content

[0004] The purpose of this utility model is to provide a welding fixture for steel arch frames used in tunnel support. This fixture solves the problem that the platform for placing the arch frame cannot be used to stably support arch frames of different sizes and curvatures, which can easily cause shaking during the welding process and affect the efficiency and accuracy of the welding.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model provides a welding fixture for steel arch frames used in tunnel support, including a base. The top of the base is provided with a displacement groove, a transmission screw is connected to the middle of the displacement groove, and a stop block is connected to the middle of the displacement groove. The top of the base is provided with a rotating disk, the middle of the rotating disk is provided with a deflection groove, a deflection rod is connected to the deflection groove, a retraction rod is connected to the top of the deflection rod, a fitting block is connected to the top of the retraction rod, lifting blocks are connected to both sides of the retraction rod, and limiting components are connected to both sides of the inner wall of the middle of the deflection rod. The limiting components retract along the groove by the displacement of the lifting blocks.

[0007] Preferably, the transmission screw passes through the abutment block for connection, and the thread of the transmission screw sidewall matches the thread of the abutment block through hole.

[0008] Preferably, the rotating disk further includes a pin hole and a fitting groove, with the pin hole located on one side of the rotating disk and the fitting groove located on both sides of the middle of the deflection groove.

[0009] Preferably, the retractable rod includes a lifting groove, a slider, a slide groove, a limiting block, and an extrusion slope. The lifting groove is provided on both sides of the retractable rod, the slider is provided on one side of the lifting block, a slide groove is provided on one side of the middle part of the lifting groove, the limiting block is connected to the bottom of the middle part of the lifting groove, and the extrusion slope is provided on one side of the top plate of the limiting block.

[0010] Preferably, the lifting block is connected to the lifting groove by a slider on one side and a sliding groove, and an inclined surface is provided on one side of the bottom of the lifting block.

[0011] Preferably, the limiting block is provided with protrusions on both sides that cooperate with the grooves on both sides of the bottom of the lifting groove, and the side of the limiting block away from the extrusion slope is rotatably connected to a round shaft.

[0012] Preferably, the bonding block includes a rubber layer and a support rod. The bonding block is made of elastic metal. The rubber layer is disposed on the top of the bonding block. The support rod is connected to both sides of the bottom of the bonding block through a hinge block. The end of the support rod away from the bonding block is hinged to the top side of the lifting block.

[0013] Preferably, the defined components include a shrinkage groove, a combination groove, and a combination block. The shrinkage groove is a groove provided on the top of the deflection rod and cooperating with the shrinkage rod. The combination groove is provided on both sides of the inner wall of the shrinkage groove. The combination block is a number of "T"-shaped protrusions connected in the combination groove.

[0014] Preferably, the deflection rod includes a pin and a fitting shaft. The pin passes through a pin hole and is connected to the side of the deflection rod near the bottom. The fitting shaft is a rod body that mates with the fitting groove on both sides of the bottom of the deflection rod.

[0015] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0016] 1. The device uses a deflecting rod that deflects on a rotating disk to expand and support arch frames of different specifications. This allows one end of the steel plate connected to the arch frame to be suspended on one side for easy welding.

[0017] 2. The device is also equipped with a limiting component. When the arch frame passes under the hoisting equipment and is placed on the deflection rod, the limiting component can expand and contract according to the curvature of the arch frame. At the same time, the part that fits the arch frame deforms in accordance with the curvature of the arch frame. Then, as the arch frame is lowered, the retractable rod is automatically limited to prevent it from moving down on its own and is not restricted by limiting structures such as pins and bolts. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a partial side view sectional structural diagram of the base of this utility model.

[0020] Figure 3 This is a side view sectional structural diagram of the rotating disk of this utility model.

[0021] Figure 4 This is a side view cross-sectional structural diagram of the deflection rod of this utility model.

[0022] Figure 5 This utility model Figure 4 A magnified structural diagram of point A in the middle.

[0023] Figure 6 This utility model Figure 4 A magnified structural diagram at point B in the middle.

[0024] Figure 7 This is a schematic diagram of the overall structure of the limiting block of this utility model.

[0025] Reference numerals: 1-base, 101-displacement groove, 102-transmission screw, 2-stop block, 3-rotating disk, 301-pin hole, 302-deflection groove, 303-fitting groove, 4-deflection rod, 401-retraction rod, 4011-lifting groove, 4012-lifting block, 4013-slider, 4014-slide groove, 4015-limiting block, 4016-extrusion inclined surface, 402-fitting block, 4021-rubber layer, 4022-support rod, 403-pin, 4031-fitting shaft, 4032-retraction groove, 4033-combination groove, 4034-combination block. Detailed Implementation

[0026] The following is combined with Figures 1 to 7 This utility model will be described in detail.

[0027] A welding fixture for a steel arch frame used in tunnel support includes a base 1. A displacement groove 101 is provided at the top of the base 1. A transmission screw 102 is connected to the middle of the displacement groove 101. A stop block 2 is connected to the middle of the displacement groove 101. A rotating disk 3 is provided at the top of the base 1. A deflection groove 302 is provided in the middle of the rotating disk 3. A deflection rod 4 is connected to the deflection groove 302. A retraction rod 401 is connected to the top of the deflection rod 4. A fitting block 402 is connected to the top of the retraction rod 4. Lifting blocks 4012 are connected to both sides of the 01. Limiting components are connected to both sides of the inner wall of the middle part of the deflection rod 4. The limiting components are compressed along the groove by the displacement of the lifting blocks 4012. The transmission screw 101 passes through the abutment block 2 for connection. The side wall of the transmission screw 101 is threadedly matched with the inner wall of the through hole of the abutment block 2. The rotating disk 3 also includes a pin hole 301 and a fitting groove 303. The pin hole 301 is located on one side of the rotating disk 3, and the fitting groove 303 is located on both sides of the middle part of the deflection groove 302.

[0028] First, the arch frame that needs to be welded and connected to the steel plates is lifted by hoisting equipment. At the same time, several deflection rods 4 on the base 1 are deflected to unfold it to match the curvature of the arch frame. Then, the arch frame is moved to the fitting block 402 at the top of the deflection rods 4 by the hoisting equipment. By lowering the arch frame and applying pressure, the shrink rod 401 is forced to shrink into the shrink groove 4032. The shrinkage of the shrink rod 401 matches the arch frame with different curvatures.

[0029] Furthermore, the retractable rod 401 includes a lifting groove 4011, a slider 4013, a sliding groove 4014, a limiting block 4015, and a pressing inclined surface 4016. The lifting groove 4011 is disposed on both sides of the retractable rod 401, the slider 4013 is disposed on one side of the lifting block 4012, the sliding groove 4014 is disposed on one side of the middle of the lifting groove 4011, the limiting block 4015 is connected to the bottom of the middle of the lifting groove 4011, the pressing inclined surface 4016 is disposed on one side of the top plate of the limiting block 4015, the lifting block 4012 is connected to the lifting groove 4011 through the slider 4013 on one side cooperating with the sliding groove 4014, the bottom side of the lifting block 4012 is provided with an inclined surface, the two sides of the limiting block 4015 are provided with protrusions that cooperate with the grooves on both sides of the bottom of the lifting groove 4011, and the side of the limiting block 4015 away from the pressing inclined surface 4016 is rotatably connected to a round shaft, and the bonding block 402 includes a rubber layer 4021. The support rod 4022 and the bonding block 402 are made of elastic metal. The rubber layer 4021 is set on the top of the bonding block 402. The support rod 4022 is connected to the bottom two sides of the bonding block 402 by hinge blocks. The end of the support rod 4022 away from the bonding block 402 is hinged to the top side of the lifting block 4012. The limiting component includes a shrinkage groove 4032, a combination groove 4033 and a combination block 4034. The shrinkage groove 4032 is a groove set on the top of the deflection rod 4 and cooperates with the shrinkage rod 401. The combination groove 4033 is set on both sides of the inner wall of the shrinkage groove 4032. The combination block 4034 is a number of "T"-shaped protrusions connected in the combination groove 4033. The deflection rod 4 includes a pin 403 and a fitting shaft 4031. The pin 403 passes through the pin hole 301 and is connected to the side of the deflection rod 4 near the bottom. The fitting shaft 4031 is a rod body on both sides of the bottom of the deflection rod 4 that cooperates with the fitting groove 303.

[0030] Then, when the retracting rod 401 retracts into the retracting groove 4032, the limiting blocks 4015 in the lifting grooves 4011 on both sides will slide against the combined blocks on both sides of the retracting groove 4032. After one end of the arch frame has been placed against the base 1 by the abutment block 2, the retracting rod 401 will also stop moving. Then, the retracting rod 401 itself will generate an upward thrust due to the extension and retraction connection with the spring at the bottom of the retracting groove 4032.

[0031] Simultaneously, when the arch frame is pressed against the bonding block 402, the bonding block 402, due to its inherent elastic metal strength, guides part of the force applied during the pressing process by the movement of the retraction rod 401, preventing it from being easily deformed by the arc of the arch frame. Even if deformation occurs, the connection of the two end support rods 4022 will cause the lifting block 4012 to move downward and abut against the limiting block 4015. Through the resistance of the limiting block 4015 against the bonding assembly block 4034, the bonding block 4012... 02 It will not be easily squeezed and deformed, so that the pressure when the arch frame is lowered will act on the downward movement of the retraction rod 401. At the same time, the roller on one side of the limiting block 4015 can also better ensure that the downward movement of the retraction rod 401 is not stuck. The roller allows the limiting block 4015 to roll down better when it moves down. It will not cause the force of the lifting block 4012 to act on the inclined surface of the limiting block 4015 due to jamming, causing the limiting block 4015 to shift to one side. This causes the extrusion combination block 4034 to shift into the combination groove 4033 to form a fitting and limiting.

[0032] When the arch frame stops below, the retraction rod 401, due to the upward pressure of the bottom spring telescopic rod, will force the resetting pressure to act on the mating block 402, causing the mating block 402 to deform to match the curvature of the arch frame. Then, when the mating block 402 deforms, it will drive the lifting block to move downward, applying force to the inclined surface on one side of the limiting block 4015 to squeeze it, forcing the limiting block 4015 to move to one side, thereby squeezing the corresponding mating position assembly block 4034 to move into the assembly groove 4033, thus forming a groove on both sides of the inner wall of the retraction groove 4032 to limit the limiting block 4015, and also to limit the retraction rod 401, preventing it from continuing to move on its own. Then, the hoisting equipment is removed, allowing the arch frame to be stably supported by the deflection rod 4, allowing one end to be suspended in the air to facilitate the welding of the connecting steel plates.

[0033] The following is a detailed implementation process of this utility model: First, the arch frame that needs to be welded and connected to the steel plates is lifted by a hoisting device. Simultaneously, several deflection rods 4 on the base 1 are controlled to deflect the arch frame, thus unfolding it to match the curvature of the arch frame. Then, the arch frame is moved to the contact block 402 at the top of the deflection rods 4 by the hoisting device. The arch frame is lowered and pressure is applied, forcing the retraction rod 401 to retract into the retraction groove 4032. The retraction of the retraction rod 401 matches arch frames with different curvatures. When the retraction rod 401 retracts into the retraction groove 4032, the limiting blocks 4015 in the lifting grooves 4011 on both sides slide against the combined blocks on both sides of the retraction groove 4032. Meanwhile, at one end of the arch frame... After the abutment block 2 is placed against the base 1, the retractable rod 401 will stop moving. Then, the retractable rod 401 itself will generate an upward thrust due to the spring extension connection with the bottom of the retractable groove 4032. At the same time, when the arch frame is pressed against the bonding block 402, the bonding block 402, due to its own elastic metal strength, will guide part of the force when the arch frame is pressed against it due to the movement of the retractable rod 401, so that it will not be easily deformed by the arc of the arch frame. Even if deformation occurs, the connection of the support rods 4022 at both ends will cause the lifting block 4012 to move down and abut against the limiting block 4015, and the bonding assembly will be formed by the limiting block 4015. The resistance of the connecting block 4034 prevents the bonding block 402 from being easily squeezed and deformed, so that the pressure when the arch frame is lowered will act on the downward movement of the retraction rod 401. At the same time, the roller on one side of the limiting block 4015 can also better ensure that the downward movement of the retraction rod 401 is not stuck. The roller allows the limiting block 4015 to roll down better, and it will not be stuck. The force of the lifting block 4012 will act on the inclined surface of the limiting block 4015, causing the limiting block 4015 to move to one side. This causes the pressing assembly block 4034 to move into the assembly groove 4033 to form a fitting and limiting. When the arch frame stops at the bottom, when the retraction rod 401 is pressed upward by the bottom spring telescopic rod, it will force the reset pressure to be applied. The adhesive block 402 is used to deform to match the curvature of the arch frame. When the adhesive block 402 deforms, it will drive the lifting block to move down, and apply force to the inclined surface of the limiting block 4015 to squeeze it. This forces the limiting block 4015 to move to one side, thereby squeezing the corresponding fitting position of the combination block 4034 into the combination groove 4033. This forms a groove on both sides of the inner wall of the shrinkage groove 4032 to limit the limiting block 4015 and also limit the shrinkage rod 401 to prevent it from continuing to move on its own. Then the hoisting equipment is removed, so that the arch frame can be stably supported by the deflection rod 4, allowing one end to be suspended in the air to facilitate the welding of the connecting steel plates.

Claims

1. A welding fixture for a steel arch frame used in tunnel support, comprising a base (1), characterized in that, The base (1) has a displacement groove (101) at its top, a transmission screw (102) connected to the middle of the displacement groove (101), a stop block (2) connected to the middle of the displacement groove (101), a rotating disk (3) at its top, a deflection groove (302) at the middle of the rotating disk (3), a deflection rod (4) connected to the deflection groove (302), a retraction rod (401) connected to the top of the deflection rod (4), a fitting block (402) connected to the top of the retraction rod (401), lifting blocks (4012) connected to both sides of the retraction rod (401), and limiting components connected to both sides of the inner wall of the middle part of the deflection rod (4). The limiting components retract along the groove by the displacement of the lifting block (4012).

2. The welding fixture for steel arch frames used in tunnel support according to claim 1, characterized in that, The transmission screw (102) is connected through the abutment block (2), and the side wall of the transmission screw (102) is threadedly matched with the inner wall of the through hole of the abutment block (2).

3. The welding fixture for steel arch frames used in tunnel support according to claim 1, characterized in that, The rotating disk (3) also includes a pin hole (301) and a fitting groove (303). The pin hole (301) is located on one side of the rotating disk (3), and the fitting groove (303) is located on both sides of the middle part of the deflection groove (302).

4. The welding fixture for steel arch frames used in tunnel support according to claim 1, characterized in that, The retractable rod (401) includes a lifting groove (4011), a slider (4013), a slide groove (4014), a limiting block (4015), and an extrusion inclined surface (4016). The lifting groove (4011) is provided on both sides of the retractable rod (401), the slider (4013) is provided on one side of the lifting block (4012), the slide groove (4014) is provided on one side of the middle part of the lifting groove (4011), the limiting block (4015) is connected to the bottom of the middle part of the lifting groove (4011), and the extrusion inclined surface (4016) is provided on one side of the top plate of the limiting block (4015).

5. The welding fixture for steel arch frames used in tunnel support according to claim 1, characterized in that, The bonding block (402) includes a rubber layer (4021) and a support rod (4022). The bonding block (402) is made of elastic metal. The rubber layer (4021) is disposed on the top of the bonding block (402). The support rod (4022) is connected to both sides of the bottom of the bonding block (402) by a hinge block. The end of the support rod (4022) away from the bonding block (402) is hinged to the top side of the lifting block (4012).

6. The welding fixture for steel arch frames used in tunnel support according to claim 1, characterized in that, The limiting components include a shrinkage groove (4032), a combination groove (4033), and a combination block (4034). The shrinkage groove (4032) is a groove provided on the top of the deflection rod (4) and cooperating with the shrinkage rod (401). The combination groove (4033) is provided on both sides of the inner wall of the shrinkage groove (4032). The combination block (4034) is a number of "T"-shaped blocks connected in the combination groove (4033).

7. The welding fixture for steel arch frames used in tunnel support according to claim 1, characterized in that, The deflection rod (4) includes a pin (403) and a fitting shaft (4031). The pin (403) passes through the pin hole (301) and is connected to the deflection rod (4) near the bottom. The fitting shaft (4031) is a rod body that mates with the fitting groove (303) on both sides of the bottom of the deflection rod (4).

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