Gun head for pavement structure through crack welding seam

Abstract

The utility model relates to the technical field of pavement cracks and welds, and discloses a gun head for pavement structure through cracks and welds, one side of a caulking gun is fixedly provided with an adjusting box, the other end of the adjusting box is fixedly provided with a gun head pipe, and the gun head pipe is communicated with the interior of the adjusting box; by arranging the striker plates symmetrically distributed in the adjusting box, when the two-way air pump works, air enters the driving cavities on the two sides through the air distribution groove, the piston piece is pushed to drive the piston rod to transversely move, then the striker plates do opposite or back-to-back movement in the cavities, and the sectional area of the discharging channel can be adjusted in real time according to the width of a crack; the air pump inputs high-pressure air into the driving cavity, so that the baffle plate is expanded outwards to enlarge the discharge port, and the discharge port is reduced when the crack is relatively narrow, so that the linear control on the glue discharge amount is realized, the problem that the traditional glue gun cannot adapt to different crack widths is solved, the material waste is avoided, and the filling compactness is improved.

Description

Technical Field

[0001] This utility model relates to the field of road surface crack welding technology, and in particular to a welding torch for welding through cracks in road structures. Background Technology

[0002] Through-cracks in pavement structure refer to cracks that penetrate the pavement surface layer, base layer, and even extend to the subgrade. Their formation is complex, including long-term vehicle load, thermal expansion and contraction of materials due to temperature changes, uneven settlement of the subgrade, and aging of pavement materials. Once these cracks appear, if they are not repaired in time, rainwater will seep into the subgrade along the cracks, causing the subgrade soil to soften, reducing the pavement's load-bearing capacity, accelerating pavement structural damage, and in severe cases, even causing pavement collapse, affecting driving safety and the service life of the road. Therefore, timely repair of through-cracks in pavement structure is crucial. Currently, using a repair gun to fill with special repair materials is a common and effective method for crack repair.

[0003] However, existing glue gun nozzles often cannot freely control the amount of material dispensed during use. In actual road repair operations, the width, depth, and direction of cracks are often irregular and vary greatly, making it difficult to freely and accurately control the amount of material dispensed according to the specific conditions of the cracks, and failing to meet the differentiated needs of different cracks for the amount of repair material used. Utility Model Content

[0004] In response to the inability to freely control the material output during use, and the fact that the distribution, width, depth, and direction of cracks are often irregular and vary greatly in actual road repair operations, making it difficult to freely and accurately control the material output according to the specific conditions of the cracks, and failing to meet the differentiated needs of different cracks for the amount of repair material, this utility model provides a welding gun head for through cracks in road structures, which has the advantages of adjustable material output and replaceable filling nozzle, thus solving the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a welding gun head for through cracks in road structures, including a caulking gun. An adjustment box is fixedly installed on one side of the caulking gun, and a gun head tube is fixedly installed on the other end of the adjustment box. The gun head tube and the interior of the adjustment box are connected. A chamber is formed inside the adjustment box, and two baffles are symmetrically arranged inside the chamber. A piston rod is fixedly installed on the side of each of the two baffles, and a piston element is fixedly installed on the other end of each piston rod. Driving chambers are formed at both ends of the adjustment box, and one side of each driving chamber is connected to the interior of the chamber. A mounting frame is fixedly installed on the upper end of the adjustment box, and a bidirectional air pump is fixedly installed on the inner side of the mounting frame. An air distribution groove is formed on the upper end of the adjustment box, and the bottom ends of the air distribution groove are respectively connected to the two driving chambers. The bottom of the bidirectional air pump is connected to the upper end of the air distribution groove via a pipe.

[0006] Preferably, the piston rod is located on the inner side of the drive cavity near the piston member, and the side of the piston member is in contact with the inner wall of the drive cavity.

[0007] By ensuring the piston's side fits snugly against the inner wall of the drive chamber, airtightness is guaranteed during pneumatic drive, preventing gas leakage and ensuring the accuracy of the baffle's movement.

[0008] Preferably, the outlet of the gun head tube is provided with a caulking nozzle, and inserts are fixedly installed on both sides of the caulking nozzle. Two mounting grooves are opened at both ends of the gun head tube.

[0009] The insert strips on both sides of the caulking nozzle allow for a seamless connection with the nozzle head tube mounting groove, facilitating quick installation and removal of the nozzle.

[0010] Preferably, the inner sides of the two mounting slots are provided with limiting grooves that are adapted to the insert strip, the insert strip is inserted and installed inside the mounting slot, and a rotating rod is rotatably installed inside the mounting slot.

[0011] The installation groove provides a positioning guide for the insert, ensuring the accuracy of the sealant nozzle during installation.

[0012] Preferably, a limiting block that cooperates with the insert is fixedly installed on the surface of the rotating rod, a pressing plate is fixedly installed on the surface of the rotating rod, a return spring is fixedly installed on the inner side of the pressing plate, and the other end of the return spring is fixedly installed on the inner wall of the mounting groove.

[0013] By setting a limiting block on the surface of the rotating rod, a limiting structure is formed after it is engaged with the insert strip, ensuring the stability of the sealant nozzle after installation.

[0014] Preferably, when the insert is connected inside the limiting groove, the limiting block engages with the side of the insert, and when the reset spring is released elastically, the limiting block limits the insert.

[0015] By setting a reset spring, the rotating rod is pushed to drive the limit block to lock the insert, thereby achieving automatic limiting after the caulking nozzle is installed.

[0016] This utility model has the following advantages:

[0017] 1. By setting up symmetrically distributed baffles inside the adjustment box, when the bidirectional air pump is working, the gas enters the two drive chambers on both sides through the air distribution groove, pushing the piston to move the piston rod laterally, thereby causing the baffles to move relative to or away from each other in the chamber. The cross-sectional area of ​​the discharge channel can be adjusted in real time according to the crack width. When the crack is wide, the air pump inputs high-pressure gas into the drive chamber to expand the discharge port outside the baffle. When the crack is narrow, the discharge port is reduced, thereby achieving linear control of the glue output. This solves the problem that traditional glue guns cannot adapt to different crack widths, avoids material waste, and improves the filling density.

[0018] 2. By setting the inserts on both sides of the nozzle to engage with the limiting grooves in the gun head tube mounting slot, when changing the nozzle, pressing the pressing plate drives the rotating rod to rotate, and the limiting block disengages from the insert, allowing the old nozzle to be pulled out. When installing a new nozzle, insert the insert into the limiting groove, release the pressing plate, and the return spring pushes the pressing plate to reset the rotating rod, and the limiting block locks the side of the insert. This structure achieves quick installation and removal of the nozzle through elastic locking, and different specifications of nozzles can be replaced according to the direction and depth of the crack. This solves the problem that traditional glue gun nozzle fixation cannot adapt to complex cracks, improving operational flexibility and repair efficiency. At the same time, the elastic limiting of the return spring ensures that the nozzle will not loosen or fall off during use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall front view structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the adjustment box structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the adjustment box of this utility model;

[0022] Figure 4 This is a schematic diagram of the top cross-sectional view of the upper end of the adjustment box of this utility model;

[0023] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0024] In the diagram: 1. Cement gun; 2. Gun head tube; 3. Adjustment box; 4. Chamber; 5. Baffle plate; 6. Drive chamber; 7. Piston rod; 8. Piston component; 9. Mounting bracket; 10. Two-way air pump; 11. Air distribution groove; 12. Cement nozzle; 13. Mounting groove; 14. Insert strip; 15. Limiting groove; 16. Rotating rod; 17. Limiting block; 18. Pressing plate; 19. Return spring. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1-5 A welding torch for through cracks in road structure, including a caulking torch 1, an adjusting box 3 fixedly installed on one side of the caulking torch 1, and a torch tube 2 fixedly installed on the other end of the adjusting box 3, with the torch tube 2 and the adjusting box 3 connected internally.

[0027] The regulating box 3 has a chamber 4 inside, and two baffles 5 are symmetrically arranged inside the chamber 4. A piston rod 7 is fixedly installed on the side of each baffle 5, and a piston 8 is fixedly installed on the other end of each piston rod 7. Both ends of the regulating box 3 have a drive chamber 6. One side of the drive chamber 6 is connected to the inside of the chamber 4. When the crack is wide, the bidirectional air pump 10 inputs high-pressure gas into the drive chamber 6 to expand the outlet of the baffle 5. When the crack is narrow, the outlet is reduced, thereby realizing linear control of the glue output. This solves the problem that traditional glue guns cannot adapt to different crack widths, avoids material waste, and improves filling density.

[0028] An installation frame 9 is fixedly installed on the upper end of the regulating box 3. A bidirectional air pump 10 is fixedly installed on the inner side of the installation frame 9. An air distribution groove 11 is opened on the upper end of the regulating box 3. The bottom ends of the air distribution groove 11 are respectively connected to two drive chambers 6. The bottom of the bidirectional air pump 10 is connected to the upper end of the air distribution groove 11 through a pipe. Baffle plates 5 are symmetrically distributed inside the regulating box 3. When the bidirectional air pump 10 is working, the gas enters the two drive chambers 6 through the air distribution groove 11, pushing the piston 8 to drive the piston rod 7 to move laterally, thereby causing the baffle plates 5 to move relative to or away from each other in the chamber 4. The cross-sectional area of ​​the discharge channel can be adjusted in real time according to the crack width.

[0029] Please see Figures 2-4The piston rod 7 is located on the inner side of the drive chamber 6 near the piston 8. The side of the piston 8 is in contact with the inner wall of the drive chamber 6. When the bidirectional air pump 10 inputs gas into the drive chamber 6, the in contact piston 8 can effectively block gas leakage and ensure the stability of the air pressure drive. This allows the piston rod 7 to accurately drive the baffle plate 5 to adjust the flow cross-sectional area of ​​the chamber 4, thereby achieving precise control of the amount of glue dispensed. The output port of the gun head tube 2 is provided with a caulking nozzle 12. Inserts 14 are fixedly installed on both sides of the caulking nozzle 12. Two mounting grooves 13 are opened at both ends of the gun head tube 2. The inner side of the two mounting grooves 13 is provided with a limiting groove 15 that matches the insert 14. When the insert 14 is inserted, it can be accurately positioned along the groove to ensure that the caulking nozzle 12 and the output port of the gun head tube 2 are coaxially installed, avoiding deviation in the discharge direction due to installation offset. At the same time, the setting of the limiting groove 15 ensures that the caulking nozzle 12 can be accurately installed, and the limiting block 17 can accurately engage with the insert 14.

[0030] Insert 14 is inserted and installed inside mounting groove 13. Rotating rod 16 is rotatably installed inside mounting groove 13. Limiting block 17 that cooperates with insert 14 is fixedly installed on the surface of rotating rod 16. Pressing plate 18 is fixedly installed on the surface of rotating rod 16. Return spring 19 is fixedly installed on the inner side of pressing plate 18. Using rotating rod 16 as a lever, when pressing pressing plate 18, the axis of rotating rod 16 is used as the fulcrum. The lever principle causes limiting block 17 to lift up and disengage from insert 14, releasing the limit. The other end of return spring 19 is fixedly installed on the inner wall of mounting groove 13. By setting insert 14 on both sides of nozzle to engage with limiting groove 15 in gun head tube 2 mounting groove 13, when changing nozzle, pressing pressing plate 18 drives rotating rod 16 to rotate, limiting block 17 disengages from insert 14, and old nozzle can be pulled out.

[0031] When the insert 14 is connected inside the limiting groove 15, the limiting block 17 and the side of the insert 14 are engaged with each other. When the return spring 19 is released elastically, the limiting block 17 limits the insert 14. When installing a new nozzle, insert 14 is inserted into the limiting groove 15. After releasing the pressing plate 18, the return spring 19 pushes the pressing plate 18 to reset the rotating rod 16. The limiting block 17 clamps the side of the insert 14. This structure achieves quick installation and removal of the nozzle through elastic engagement. Different specifications of nozzles can be replaced according to the direction and depth of the crack. This solves the problem that the traditional glue gun nozzle fixation cannot adapt to complex cracks, improves the flexibility of operation and repair efficiency. At the same time, the elastic limiting of the return spring 19 ensures that the nozzle will not loosen or fall off during use.

[0032] Working principle: In actual use, first connect the caulking gun 1 to the external feeding device. The repair material flows into the chamber 4 of the regulating box 3 through the caulking gun 1. When it is necessary to adjust the amount of glue dispensed, start the bidirectional air pump 10. The air pump delivers gas to the air distribution groove 11 through the pipeline. The gas enters the two drive chambers 6 on both sides through the air distribution groove 11.

[0033] Under air pressure, the piston 8 slides in the drive chamber 6, driving the piston rod 7 to push the baffle 5 to move in the chamber 4, thereby changing the flow cross-sectional area of ​​the chamber 4 and controlling the amount of glue discharged. When encountering a wider crack, the bidirectional air pump 10 inputs gas into the drive chamber 6, pushing the piston 8 to move the baffle 5 outward, increasing the flow cross-sectional area of ​​the chamber 4 and increasing the amount of glue discharged. Conversely, when encountering a narrower crack, the direction or pressure of the air pump is adjusted to make the baffle 5 move inward, reducing the flow cross-sectional area and reducing the amount of glue discharged.

[0034] When replacing the sealant nozzle 12, first align the insert 14 with the mounting groove 13 of the nozzle tube 2. When inserting the insert 14, the inclined surface of the end of the insert 14 that contacts the limiting block 17 pushes the limiting block 17 outward and compresses the return spring 19. When the insert 14 is fully inserted into the limiting groove 15 of the mounting groove 13, the limiting block 17 is reset under the action of the return spring 19 and locks onto the side of the insert 14, thus completing the installation and fixing of the sealant nozzle 12. When disassembling, press the pressing plate 18 to drive the rotating rod 16 to rotate, so that the limiting block 17 disengages from the insert 14, and the insert 14 can be pulled out of the mounting groove 13, realizing the quick disassembly of the nozzle.

Claims

1. A welding torch for through-cracks in road structures, including a caulking torch (1), characterized in that: An adjustment box (3) is fixedly installed on one side of the caulking gun (1), and a gun head tube (2) is fixedly installed on the other end of the adjustment box (3). The gun head tube (2) and the adjustment box (3) are connected internally. A chamber (4) is opened inside the adjustment box (3). Two baffles (5) are symmetrically arranged inside the chamber (4). A piston rod (7) is fixedly installed on the side of each of the two baffles (5). A piston component (8) is fixedly installed on the other end of each piston rod (7). The adjustment box ( 3) Both ends of the adjustment box (3) are provided with drive chambers (6). One side of the drive chamber (6) is connected to the inside of the chamber (4). The upper end of the adjustment box (3) is fixedly installed with a mounting bracket (9). The inner side of the mounting bracket (9) is fixedly installed with a bidirectional air pump (10). The upper end of the adjustment box (3) is provided with a gas distribution groove (11). The bottom ends of the gas distribution groove (11) are respectively connected to the two drive chambers (6). The bottom of the bidirectional air pump (10) is connected to the upper end of the gas distribution groove (11) through a pipe.

2. The welding torch for through cracks in road structures according to claim 1, characterized in that: The piston rod (7) is located on the inner side of the drive cavity (6) near the piston member (8), and the side of the piston member (8) is in contact with the inner wall of the drive cavity (6).

3. The welding torch for through cracks in road structures according to claim 1, characterized in that: The outlet of the gun head tube (2) is provided with a caulking nozzle (12), and inserts (14) are fixedly installed on both sides of the caulking nozzle (12). Two mounting slots (13) are opened at both ends of the gun head tube (2).

4. The welding torch for through cracks in road structures according to claim 3, characterized in that: The inner sides of the two mounting slots (13) are provided with limiting grooves (15) that are adapted to the insert (14). The insert (14) is inserted into the mounting slot (13). A rotating rod (16) is rotatably installed inside the mounting slot (13).

5. The welding torch for through cracks in road structures according to claim 4, characterized in that: The rotating rod (16) is fixedly mounted with a limiting block (17) that cooperates with the insert (14). The rotating rod (16) is fixedly mounted with a pressing piece (18). The pressing piece (18) is fixedly mounted with a return spring (19) on its inner side. The other end of the return spring (19) is fixedly mounted on the inner wall of the mounting groove (13).

6. The welding torch for through cracks in road structures according to claim 5, characterized in that: When the insert (14) is connected inside the limiting groove (15), the limiting block (17) engages with the side of the insert (14). When the reset spring (19) is released elastically, the limiting block (17) limits the insert (14).

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