A flame cutter for bridge construction

Abstract

The present application provides a flame cutter for bridge construction, which relates to the technical field of flame cutting equipment; it comprises a support part, on which an expansion positioning piece is installed; the expansion positioning piece is used to fit on the bottom of the turntable on the bridge swivel; a flame cutting device is plugged into the support part; the flame cutting device is used to flame cut the bridge swivel limiting I-beam; a cutting positioning part is installed on the support part; a cutting prompt part is installed on the cutting positioning part; a gap detection piece can perform cutting gap detection, can be used to detect the horizontality of the cutting gap, and can also be used to detect whether the cutting gap width meets the standard, which solves the problems of poor cutting horizontality of the current flame cutter for bridge construction, poor stability of manual hand-holding, and easy stagnation during rotation once the cutting is skewed, affecting the safety of the rotation.

Description

Technical Field

[0001] The present application relates to the technical field of flame cutting equipment, and in particular to a flame cutter for bridge construction. Background Art

[0002] The bridge construction work involves the rotation construction of the bridge, that is, the formed bridge piers and the bridge deck need to be rotated a certain angle to connect the bridge decks on both sides. In some construction environments with obstructions such as railways, the bridge rotation construction is widely used. When performing the bridge rotation construction, it usually relies on the upper turntable to cooperate with the lower turntable, and a ball joint is used in the middle to connect the upper turntable with the lower turntable. The upper turntable is driven by hydraulic pressure to rotate. When the upper turntable and the lower turntable are cast, two I-beams need to be embedded between the upper turntable and the lower turntable to play a limit role before the rotation construction. It needs to be cut off when the bridge rotates. At present, manually operated flame cutters are mostly used for cutting. The current flame cutters for bridge construction are not convenient for adapting to the upper turntable and the lower turntable for rotation construction. The cutting level is not good, and the stability of manual hand-held is not good. Because the upper turntable and the lower turntable need to rotate, once the cutting is skewed, it is easy to cause jamming during rotation, affecting the safety of rotation. At the same time, it is not easy for humans to understand the cutting effect of flame cutting, and they rely more on manual naked eye observation. Horizontal flame cutting is easy to cause molten liquid beads to bulge, affecting the cutting and separation effect. Summary of the invention

[0003] The embodiment of the present application relates to a flame cutter for bridge construction, wherein a gap detection part of the flame cutter can detect the cutting gap and can be used to detect the horizontality of the cutting gap and whether the cutting gap width meets the standard, thereby solving the problem that the cutting gap is too small and cannot be easily found, thus affecting the construction effect and safety of the rotation.

[0004] In the first aspect of the present application, a flame cutter for bridge construction is provided, comprising a support portion, on which an expansion positioning piece is installed; the expansion positioning piece is used to fit on the bottom of the turntable on the bridge swivel; a flame cutting device is plugged into the support portion; the flame cutting device is used to flame cut the limiting I-beam of the bridge swivel; a cutting positioning portion is installed on the support portion; a cutting prompt portion is installed on the cutting positioning portion; the cutting prompt portion is used to detect the completion of cutting; a slit detection piece is installed on the cutting positioning portion; a gap detection piece is installed on the slit detection piece; the gap detection piece is used to detect the width of the cutting slit; the support portion comprises: a support plate and a support frame, on which the support frame is fixedly installed; the support plate is used to be placed on the turntable below the bridge swivel.

[0005] In at least some embodiments, the flame cutting device includes: a cutting sliding rod, a cutting flamethrower head, a gap indicator light and a cut-off indicator light, the middle part of the cutting sliding rod is a hexagonal column structure; the cutting sliding rod is slidably inserted into the hexagonal through hole on the rotating column; a handle is fixedly installed on the cutting sliding rod; a cutting flamethrower head is fixedly installed on the front end of the cutting sliding rod; the cutting flamethrower head is externally connected to a flame cutting main unit; a gap indicator light is fixedly installed on the cutting sliding rod; and a cut-off indicator light is fixedly installed on the cutting sliding rod.

[0006] In at least some embodiments, the cut-off prompt part includes: a switch connecting plate, a sleeve and a micro switch, wherein the switch connecting plate is fixedly mounted on the side of the limit bar; a micro switch is fixedly mounted on the switch connecting plate; a sleeve is provided on the switch connecting plate; and the micro switch is electrically connected to the cut-off indicator light.

[0007] In at least some embodiments, the support portion further includes: a lower bearing and a rotating column, wherein the outer ring of the lower bearing is fixedly sleeved on the support frame; the inner ring of the lower bearing is fixedly sleeved with a rotating column; a hexagonal through hole is provided on the rotating column; and the through hole on the rotating column is used to insert a flame cutting device.

[0008] In at least some embodiments, the gap detection component includes: a detection floating plate and an upper contact plate, the top of the detection floating plate is a sloped structure; the upper contact plate is fixedly installed on the bottom of the detection floating plate; the detection floating plate is slidably installed on the plug plate; the upper contact plate is aligned with the lower contact plate; the lower contact plate, the upper contact plate and the gap indicator light are connected in series with a battery power supply; and a gap is provided between the lower contact plate and the upper contact plate.

[0009] In at least some embodiments, the cut-off prompt part also includes: a touch cover and a reset spring, wherein the touch cover is slidably sleeved on the sleeve; the touch cover is attached to the end of the micro switch; the reset spring is sleeved on the outside of the sleeve; one end of the reset spring is fixedly connected to the touch cover, and the other end of the reset spring is fixedly connected to the switch connecting plate; the micro switch is used to detect that the bridge rotation limit I-beam is completely cut off.

[0010] In at least some embodiments, the seam detection component includes: a seam detection frame, an insert plate, a lower contact plate and a flame shield plate, wherein the seam detection frame is fixedly mounted on the positioning connecting frame by bolts; a plug plate is fixedly mounted on the end of the seam detection frame; the end of the plug plate is a slope structure; a lower contact plate is fixedly mounted inside the plug plate; the flame shield plate is fixedly mounted on the front end of the plug plate; the flame shield plate corresponds to a cutting flamethrower head; and the flame shield plate is used to shield the tail flame ejected by the cutting flamethrower head.

[0011] In at least some embodiments, the cutting positioning part includes: a positioning connecting frame, a limit bar and a magnet block, the positioning connecting frame is fixedly mounted on the cutting sliding rod; the front end of the positioning connecting frame is fixedly mounted with a limit bar; the limit bar is used to prevent the end of the cutting flamethrower head from touching the bridge swivel limit I-beam; the magnet block is fixedly embedded in the side of the limit bar; the magnet block is used to magnetically attract the bridge swivel limit I-beam.

[0012] In at least some embodiments, the gap detection component also includes: V-shaped spring clips, which are arranged in two rows, and the tops of the two rows of V-shaped spring clips are respectively fixedly mounted on the bottom of the detection floating plate; the two rows of V-shaped spring clips are respectively located on both sides of the upper contact plate; the bottoms of the two rows of V-shaped spring clips are respectively fixedly mounted on the inner side of the plug-in plate.

[0013] In at least some embodiments, the expansion positioning member includes: a rotating threaded barrel, an upper bearing, a lifting bolt and an upper support plate, the rotating threaded barrel is provided with a thread inside; the upper bearing is fixedly sleeved on the bottom of the rotating threaded barrel, and the rotating threaded barrel is located on the inner ring of the upper bearing; the outer ring of the upper bearing is fixedly sleeved on the rotating column; the lifting bolt is threadedly connected to the inside of the rotating threaded barrel; the upper support plate is fixedly installed on the top of the lifting bolt; the upper support plate is used to fit and support the bottom of the upper turntable of the bridge swivel; a handle is provided on the bottom of the upper support plate; the rotating column is used to rotate between the lower bearing and the upper bearing.

[0014] The present application provides a flame cutter for bridge construction, which has the following beneficial effects:

[0015] In the present application, a flame cutting device is used to perform cutting using flame, thereby improving the cutting quality of the structure. In conjunction with the support portion and the expansion positioning member, the cutting is flexible, and the two limit I-beams of the bridge swivel can be cut in turn, thereby improving the horizontal control effect of the flame cutting, and preventing the cutting from being skewed. The stability of manual hand-held operation is poor because the upper and lower turntables need to rotate. Once the cutting is skewed, it is easy to cause jamming during rotation. When the turntable on the bridge swivel rotates, the turntable on the bridge swivel rotates horizontally, which causes the limit I-beams to easily interfere with each other.

[0016] In addition, the use of gap detection parts in conjunction with slit detection parts can be used for slit detection. By using the slit detection part to pass through the slit, it is possible to detect whether the slit width meets the standard and whether the slit is completely cut off, thereby avoiding the situation when the flame cutting head is actually cutting in a horizontal manner. The flame cutting slit in the upper part is prone to bulges caused by molten liquid beads produced by flame cutting, which may easily lead to the slit being too small or even sticking and not being discovered, or the bridge swivel limit I-beam is not completely cut off due to the cutting operation speed being too fast. In this way, timely detection can be carried out, and the flame baffle can play a protective role to avoid the tail flame ejected from the cutting flamethrower head from baking the sandbox and other accessories on the turntable under the bridge swivel.

[0017] In addition, by adopting the cutting prompt part, the limit strip can be used to facilitate the staff to locate the bridge rotation limit I-beam, and the problem of the cutting flamethrower head directly fitting the bridge rotation limit I-beam during flame cutting, which affects the flame cutting effect, can be prevented. By adopting the cutting prompt part, the staff can understand the complete cutting, promptly know and stop the flame cutting, avoid wasting fuel, and manual operation is also more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings of the embodiments are briefly introduced below.

[0019] The drawings described below only relate to some embodiments of the present application and are not intended to limit the present application.

[0020] In the attached picture:

[0021] Figure 1 A schematic diagram showing the overall structure of the present application;

[0022] Figure 2 A schematic diagram showing the front-end structure of the present application is shown;

[0023] Figure 3 A schematic diagram showing the flame cutter of the present application installed behind the upper turntable and the lower turntable of the bridge swivel;

[0024] Figure 4 This application shows Figure 2 A magnified view of the structure of the middle A area;

[0025] Figure 5 A schematic diagram showing the support structure of the present application is shown;

[0026] Figure 6 This application shows Figure 1 A magnified view of the structure of the middle B area;

[0027] Figure 7 A schematic diagram showing the structure of the flame cutting device of the present application;

[0028] Figure 8 A schematic diagram showing the structure of the cutting positioning portion of the present application is shown;

[0029] Fig. 9 A cross-sectional view showing the structure of the cutting prompt portion of the present application;

[0030] Fig.10 A schematic diagram showing the structure of the slit detection member of the present application is shown;

[0031] Fig.11 A cross-sectional view of the structure of the slit detection member of the present application is shown;

[0032] Fig.12 A schematic diagram of the gap detection member structure of the present application is shown.

[0033] List of reference numerals:

[0034] 1. Supporting part; 101. Supporting plate; 102. Supporting frame; 103. Lower bearing; 104. Rotating column; 2. Expansion positioning piece; 201. Rotating threaded cylinder; 2011. Upper bearing; 202. Lifting bolt; 203. Upper supporting plate; 3. Flame cutting device; 301. Cutting sliding rod; 302. Cutting flame jet head; 303. Gap indicator light; 304. Cutting indicator light; 4. Cutting positioning part; 401. Positioning connection Frame; 402, limit strip; 403, magnet block; 5, cut-off prompt part; 501, switch connecting plate; 5011, sleeve; 502, micro switch; 503, touch cover; 504, reset spring; 6, seam detection part; 601, seam detection frame; 602, plug plate; 6021, lower contact plate; 603, flame baffle; 7, gap detection part; 701, detection floating sheet; 702, upper contact plate; 703, V-shaped spring. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0036] Example 1: Please refer to Figures 1 to 12 :

[0037] The present application proposes a flame cutter for bridge construction, comprising a support portion 1, on which is mounted an expansion positioning member 2; the expansion positioning member 2 is used to fit on the bottom of the turntable on the bridge swivel; a flame cutting device 3 is plugged into the support portion 1; the flame cutting device 3 is used to flame cut the bridge swivel limiting I-beam; a cutting positioning member 4 is mounted on the support portion 1; a cutting prompt member 5 is mounted on the cutting positioning member 4; the cutting prompt member 5 is used to detect the completion of cutting; a cutting seam detection member 6 is mounted on the cutting positioning member 4; a gap detection member 7 is mounted on the cutting seam detection member 6; the gap detection member 7 is used to detect the width of the cutting seam; the support portion 1 comprises: a support plate 101 and a support frame 102, on which the support frame 102 is fixedly mounted; the support plate 101 is used to be placed on the lower turntable of the bridge swivel.

[0038] In the embodiment of the present application, the support part 1 also includes: a lower bearing 103 and a rotating column 104, the outer ring of the lower bearing 103 is fixedly sleeved on the support frame 102; the inner ring of the lower bearing 103 is fixedly sleeved with the rotating column 104; the rotating column 104 is provided with a hexagonal through hole; the through hole on the rotating column 104 is used to insert the flame cutting device 3; the expansion positioning member 2 includes: a rotating threaded cylinder 201, an upper bearing 2011, a lifting bolt 202 and an upper support plate 203, the rotating threaded cylinder 201 is provided with threads inside; the upper bearing 2011 is fixedly sleeved at the bottom of the rotating threaded cylinder 201, and the rotating threaded cylinder 201 is located at the inner ring of the upper bearing 2011; the outer ring of the upper bearing 2011 is fixedly sleeved on the rotating column 104; the rotating screw The internal thread of the groove cylinder 201 is connected with a lifting bolt 202; an upper support plate 203 is fixedly installed on the top of the lifting bolt 202; the upper support plate 203 is used to fit and support the bottom of the upper turntable of the bridge swivel; a handle is provided at the bottom of the upper support plate 203; the rotary column 104 is used to rotate between the lower bearing 103 and the upper bearing 2011; the flame cutting device 3 includes: a cutting sliding rod 301, a cutting flamethrower head 302, a gap indicator light 303 and a cutting indicator light 304, and the middle part of the cutting sliding rod 301 is a hexagonal column structure; the cutting sliding rod 301 is slidably inserted into the hexagonal through hole on the rotary column 104; a handle is fixedly installed on the cutting sliding rod 301; a cutting The flamethrower head 302; the cutting flamethrower head 302 is externally connected to the flame cutting host; the cutting sliding rod 301 is fixedly installed with a gap indicator light 303; the cutting sliding rod 301 is fixedly installed with a cut-off indicator light 304, and the flame cutting device 3 is used to perform cutting work using flame, thereby improving the cutting quality of the present structure, and cooperating with the support part 1 and the expansion positioning part 2, the cutting is flexible, and the two limiting I-beams of the bridge swivel can be cut in turn, thereby improving the horizontal control effect of the flame cutting, and preventing the cutting from being skewed. When the turntable on the bridge swivel rotates, the turntable on the bridge swivel rotates horizontally, which leads to the problem of interference and touch of the limiting I-beams, because the upper turntable and the lower turntable need to rotate, once the cutting is skewed, it is easy to cause the problem of interference and touch. It is easy to cause jamming during rotation. At the same time, the flame cutting device 3 can be operated outside the turntable on the bridge swivel, which is more convenient to use. There is no need to manually enter the turntable on the bridge swivel for cutting operations. The handheld control swing cutting slide rod 301 can use the lower bearing 103 and the upper bearing 2011 for rotation adaptation, which can be used to adjust and adapt to the bridge swivel limit I-beam for positioning. When the cutting slide rod 301 is telescopically pushed, the cutting slide rod 301 uses the middle hexagonal column structure to play a limiting role. The used rotating column 104 will only rotate horizontally, and with the close support of the upper support plate 203, it is ensured that the cutting flamethrower head 302 can perform horizontal cutting to avoid skewed cutting.

[0039] In the embodiment of the present application, the cutting positioning part 4 includes: a positioning connecting frame 401, a limiting strip 402 and a magnet block 403. The ring at the end of the positioning connecting frame 401 is fixedly sleeved on the column structure at the front end of the cutting sliding rod 301, and another ring on the positioning connecting frame 401 is sleeved on the cutting flamethrower head 302; the limiting strip 402 is fixedly installed at the front end of the positioning connecting frame 401; the limiting strip 402 is used to prevent the end of the cutting flamethrower head 302 from touching the bridge swivel limiting I-beam; the magnet block 403 is fixedly embedded in the side of the limiting strip 402; the magnet block 403 is used to magnetically attract the bridge swivel limiting I-beam; the cutting prompt The part 5 includes: a switch connecting plate 501, a sleeve 5011 and a micro switch 502. The switch connecting plate 501 is fixedly mounted on the side of the limit strip 402; the micro switch 502 is fixedly mounted on the switch connecting plate 501; the sleeve 5011 is provided on the switch connecting plate 501; the micro switch 502 is electrically connected to the cut-off indicator light 304; the cut-off prompt part 5 also includes: a touch cover 503 and a return spring 504. The touch cover 503 is slidably sleeved on the sleeve 5011; the touch cover 503 is attached to the end of the micro switch 502; the return spring 504 is sleeved on the outside of the sleeve 5011; the return spring 504 is The end is fixedly connected to the touch cover 503, and the other end of the return spring 504 is fixedly connected to the switch connecting plate 501; the micro switch 502 is used to detect that the bridge swivel limit I-beam is completely cut off. The cutting prompt part 5 can be used to use the limit strip 402, which is convenient for the staff to locate the bridge swivel limit I-beam, and can prevent the problem that the cutting flame head 302 directly fits the bridge swivel limit I-beam during flame cutting and affects the flame cutting effect. The limit strip 402 can be used to facilitate the staff to operate outside the turntable on the bridge swivel, and the cutting prompt part 5 is used to facilitate the staff to understand the complete cutting. Know and stop the flame cutting in time to avoid wasting fuel. Manual operation is also more convenient and more practical. When operating the cutting sliding rod 301, the limit strip 402 is first attached to the bridge swivel limit I-beam, and the limit strip 402 is kept moving until the touch cover 503 on the limit strip 402 touches the bridge swivel limit I-beam, and the micro switch 502 is squeezed. The micro switch 502 can control the cut-off indicator light 304 to light up and alarm; the cutting distance reserved between the cutting flame jet head 302 and one end of the limit strip 402 is greater than the cutting thickness of the I-beam, so as to ensure that the I-beam can be completely cut off.

[0040] Embodiment 2, on the basis of embodiment 1, the slit detection member 6 comprises: a slit detection frame 601, an insert plate 602, a lower contact plate 6021 and a flame shield plate 603, the slit detection frame 601 is fixedly mounted on the positioning connection frame 401 by bolts; the insert plate 602 is fixedly mounted on the end of the slit detection frame 601; the end of the insert plate 602 is a slope structure; the lower contact plate 6021 is fixedly mounted inside the insert plate 602; the flame shield plate 603 is fixedly mounted on the front end of the insert plate 602; the flame shield plate 603 corresponds to the cutting flamethrower head 302; the flame shield plate 603 is used to shield the tail flame ejected by the cutting flamethrower head 302; the gap detection member 7 comprises: a detection floating sheet 701 and an upper contact plate 702, the top of the detection floating sheet 701 is a slope structure; the detection floating sheet 7 01 is fixedly installed with an upper contact plate 702 at the bottom; the detection floating sheet 701 is slidably installed on the plug plate 602; the upper contact plate 702 is aligned with the lower contact plate 6021; the lower contact plate 6021, the upper contact plate 702 and the gap indicator light 303 are connected in series with a battery power supply; a gap is provided between the lower contact plate 6021 and the upper contact plate 702; the gap detection piece 7 also includes: a V-shaped spring piece 703, the V-shaped spring piece 703 is provided with two rows, and the tops of the two rows of V-shaped spring pieces 703 are respectively fixedly installed at the bottom of the detection floating sheet 701; the two rows of V-shaped spring pieces 703 are respectively located on both sides of the upper contact plate 702; the bottoms of the two rows of V-shaped spring pieces 703 are respectively fixedly installed on the inner side of the plug plate 602, and the gap detection piece 7 is used in conjunction with the seam detection piece 6, which can be used for seam detection. The way that the measuring piece 6 passes through the slit can not only detect whether the slit width meets the standard, but also detect whether the slit is completely cut, so as to avoid that when the flame jet head 302 is actually cutting, because it is a horizontal cutting, the upper part of the flame cutting slit is prone to bulges caused by the molten liquid beads produced by the flame cutting, which can easily lead to the slit being too small or even adhesion and not being discovered, or the bridge swivel limit I-beam is not completely cut because the cutting operation speed is too fast. The structure can be detected in time, which is convenient for the staff to cut again to ensure the quality of the slit. At the same time, the flame baffle plate 603 can play a protective role to prevent the tail flame ejected by the cutting flame jet head 302 from baking the sandbox and other accessories on the lower turntable of the bridge swivel, causing damage. If the bridge swivel limit I-beam is not completely cut Steel, at this time, the plug plate 602 cannot follow the movement of the cutting flamethrower head 302 to pass through the bridge swivel limiting I-beam, that is, the cutting sliding rod 301 is limited and cannot swing normally, and the staff can feel it. At the same time, if there is a bulge caused by molten liquid beads at the cutting seam, the extrusion detection floating piece 701 can be used for detection. At this time, the gap indicator light 303 realizes the passage and lights up for prompting. After the staff knows about it, they can control the cutting flamethrower head 302 to cut again. The V-shaped spring piece 703 plays the role of squeezing the detection floating piece 701 to move up and reset when the detection floating piece 701 is separated from the cutting seam of the bridge swivel limiting I-beam. This structure avoids the problem that the manual naked eye observation is not accurate enough, the adhesion occurs without being discovered, and the rotation fails or cannot be rotated normally.

[0041] The working principle of this embodiment is as follows: first, place the support plate 101 on the lower turntable of the bridge swivel, hold the rotating threaded cylinder 201, manually rotate the upper support plate 203, and drive the lifting bolt 202 to spirally rise. At this time, the upper support plate 203 can be close to the upper turntable of the bridge swivel. At this time, the cutting sliding rod 301 can be held by hand for telescopic adjustment, or the cutting sliding rod 301 can be held by hand for swinging. The rotating column 104 can use the lower bearing 103 and the upper bearing 2011 for rotational adaptation, which can be used to adjust and adapt to the bridge swivel limit I-beam for positioning. When operating the cutting sliding rod 301, the limit strip 402 is first attached to the bridge swivel limit work The staff can use the magnet block 403 to magnetically locate the bridge swivel limit I-beam, but it will not affect the movement of the limit strip 402. The cutting flamethrower head 302 is turned on to spray flame, and the cutting sliding rod 301 is swung. During the process, the limit strip 402 is kept in contact with the bridge swivel limit I-beam. During the process, the cutting flamethrower head 302 can spray flame to cut the bridge swivel limit I-beam; when cutting, the swing control cutting sliding rod 301 drives the cutting seam detection part 6 to move at the same time. As the cutting flamethrower head 302 cuts the bridge swivel limit I-beam, if the bridge swivel limit I-beam is not completely cut off, the plug plate 60 2 will not be able to follow the movement of the cutting flamethrower head 302 through the bridge swivel limiting I-beam, that is, the cutting sliding rod 301 is limited and cannot swing normally, and the staff can feel it. At the same time, if there is a protrusion caused by the molten liquid beads at the cutting seam, resulting in the cutting seam being too small or there are irregular protrusions caused by the molten liquid beads, as the plug plate 602 is inserted into the cutting seam, the protrusions caused by the molten liquid beads in the cutting seam will solidify. As the plug plate 602 moves, the inclined surface of the detection floating sheet 701 will be squeezed by the too small cutting seam edge or the protrusions caused by the molten liquid beads, and the detection floating sheet 701 will drive the upper contact plate 702 to move downward to touch the lower Contact plate 6021, at this time, the gap indicator light 303 is connected and lights up for prompting. After learning this, the staff can control the cutting flamethrower head 302 to perform cutting work again; when the cutting is completed, along with the movement of the limit strip 402, until the touch cover 503 on the limit strip 402 touches the bridge rotation limit I-beam, the micro switch 502 is squeezed, which means that the bridge rotation limit I-beam is completely cut off, and the plug plate 602 will pass through the cutting seam, which will cause the touch cover 503 at the other end to touch the bridge rotation limit I-beam. The micro switch 502 is squeezed and the cut-off indicator light 304 will light up to alarm.

[0042] In this article, there are a few points to note:

[0043] 1. The drawings of the embodiments of the present application only involve structures related to the embodiments of the present application, and other structures can refer to the general design.

[0044] 2. In the absence of conflict, the embodiments of the present application and the features therein may be combined with each other to obtain new embodiments.

[0045] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A flame cutter for bridge construction, comprising a support portion (1), wherein an expansion positioning member (2) is mounted on the support portion (1); characterized in that: The expansion positioning piece (2) is used to fit on the bottom of the turntable on the bridge swivel; a flame cutting device (3) is plugged into the support portion (1); the flame cutting device (3) is used to flame cut the bridge swivel limit I-beam; The support portion (1) is provided with a cutting positioning portion (4); the cutting positioning portion (4) is provided with a cutting prompt portion (5); the cutting prompt portion (5) is used to detect the completion of cutting; A cutting seam detection component (6) is mounted on the cutting positioning portion (4); a gap detection component (7) is mounted on the cutting seam detection component (6); the gap detection component (7) is used to detect the width of the cutting seam; The support portion (1) comprises: a support plate (101) and a support frame (102); the support frame (102) is fixedly mounted on the support plate (101); the support plate (101) is used to be placed on the lower turntable of the bridge turntable; The support portion (1) further comprises: a lower bearing (103) and a rotating column (104); the outer ring of the lower bearing (103) is fixedly sleeved on the support frame (102); the inner ring of the lower bearing (103) is fixedly sleeved with the rotating column (104); a hexagonal through hole is provided on the rotating column (104); the through hole on the rotating column (104) is used to insert the flame cutting device (3); The expansion positioning member (2) comprises: a rotating threaded barrel (201), an upper bearing (2011), a lifting bolt (202) and an upper support plate (203); the rotating threaded barrel (201) is provided with threads inside; the upper bearing (2011) is fixedly sleeved on the bottom of the rotating threaded barrel (201), and the rotating threaded barrel (201) is located on the inner ring of the upper bearing (2011); the outer ring of the upper bearing (2011) is fixedly sleeved on the rotating column (104); the lifting bolt (202) is threadedly connected inside the rotating threaded barrel (201); the upper support plate (203) is fixedly installed on the top of the lifting bolt (202); the upper support plate (203) is used to fit and support the bottom of the upper turntable of the bridge swivel; a handle is provided on the bottom of the upper support plate (203); the rotating column (104) is used to rotate between the lower bearing (103) and the upper bearing (2011); The flame cutting device (3) comprises: a cutting sliding rod (301), a cutting flame jet head (302), a gap indicator light (303) and a cut-off indicator light (304); the middle part of the cutting sliding rod (301) is a hexagonal column structure; the cutting sliding rod (301) is slidably inserted into a hexagonal through hole on a rotary column (104); a handle is fixedly mounted on the cutting sliding rod (301); a cutting flame jet head (302) is fixedly mounted on the front end of the cutting sliding rod (301); the cutting flame jet head (302) is externally connected to a flame cutting main machine; a gap indicator light (303) is fixedly mounted on the cutting sliding rod (301); and a cut-off indicator light (304) is fixedly mounted on the cutting sliding rod (301); The cutting positioning part (4) comprises: a positioning connection frame (401), a limiting strip (402) and a magnet block (403); the positioning connection frame (401) is fixedly mounted on the cutting sliding rod (301); the limiting strip (402) is fixedly mounted on the front end of the positioning connection frame (401); the limiting strip (402) is used to prevent the end of the cutting flamethrower head (302) from touching the bridge rotating limiting I-beam; the magnet block (403) is fixedly embedded in the side of the limiting strip (402); the magnet block (403) is used to magnetically attract the bridge rotating limiting I-beam; The cut-off prompt portion (5) comprises: a switch connecting plate (501), a sleeve (5011) and a micro switch (502); the switch connecting plate (501) is fixedly mounted on the side of the limit strip (402); the micro switch (502) is fixedly mounted on the switch connecting plate (501); the sleeve (5011) is provided on the switch connecting plate (501); the micro switch (502) is electrically connected to the cut-off indicator light (304); The cutting prompt part (5) further comprises: a touch cover (503) and a return spring (504); the touch cover (503) is slidably sleeved on the sleeve (5011); the touch cover (503) is attached to the end of the micro switch (502); the return spring (504) is sleeved on the outside of the sleeve (5011); one end of the return spring (504) is fixedly connected to the touch cover (503), and the other end of the return spring (504) is fixedly connected to the switch connecting plate (501); the micro switch (502) is used to detect that the bridge rotation limit I-beam is completely cut off; The slit detection member (6) comprises: a slit detection frame (601), an insert plate (602), a lower contact plate (6021) and a flame shield (603); the slit detection frame (601) is fixedly mounted on the positioning connection frame (401) by means of bolts; the insert plate (602) is fixedly mounted on the end of the slit detection frame (601); the end of the insert plate (602) is an inclined surface structure; the lower contact plate (6021) is fixedly mounted inside the insert plate (602); the flame shield (603) is fixedly mounted on the front end of the insert plate (602); the flame shield (603) corresponds to the cutting flame jet head (302); the flame shield (603) is used to shield the tail flame ejected by the cutting flame jet head (302); The gap detection member (7) comprises: a detection floating sheet (701) and an upper contact plate (702); the top of the detection floating sheet (701) is an inclined structure; the bottom of the detection floating sheet (701) is fixedly mounted with the upper contact plate (702); the detection floating sheet (701) is slidably mounted on the plug plate (602); the upper contact plate (702) is aligned with the lower contact plate (6021); the lower contact plate (6021), the upper contact plate (702) and the gap indicator light (303) are connected in series to a battery power source; and a gap is provided between the lower contact plate (6021) and the upper contact plate (702).

2. A flame cutter for bridge construction according to claim 1, characterized in that: The gap detection member (7) further comprises: V-shaped spring pieces (703), wherein the V-shaped spring pieces (703) are arranged in two rows, and the tops of the two rows of V-shaped spring pieces (703) are respectively fixedly mounted on the bottom of the detection floating piece (701); the two rows of V-shaped spring pieces (703) are respectively located on both sides of the upper contact plate (702); and the bottoms of the two rows of V-shaped spring pieces (703) are respectively fixedly mounted on the inner side of the plug plate (602).

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