Bridge steel box girder assembling and welding device

Abstract

The application discloses a bridge steel box girder assembling and welding device, and relates to the technical field of welding equipment manufacturing.The device comprises a welding support, an electric sliding machine B is slidably connected to the outer wall of the welding support, a slide rail frame is fixedly connected to the electric sliding machine B, an electric sliding machine A is slidably connected to the outer wall of the slide rail frame, an electric elevator is fixedly connected to one side of the electric sliding machine A, a welding machine is slidably connected to the inner wall of the electric elevator, a welding head is fixedly connected to the bottom of the welding machine, and a heating mechanism is arranged at the bottom of the welding machine.The device can prevent the whole steel plate from being rapidly cooled to fail to reach the optimal welding temperature due to the low ambient temperature even after preheating, thereby affecting the strength, crack resistance and toughness of the welded joint, and the problem of wasting a large amount of energy and being high in cost and low in efficiency caused by reheating the whole surface of the steel plate by a baking gun does not occur.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding equipment manufacturing, in particular to a bridge steel box girder assembling and welding device. BACKGROUND

[0002] The cross-sectional shape of the box girder is the same as that of a general box, so it is called a box girder. It is generally composed of a cover plate, a web plate, a bottom plate and a partition plate. The preheating temperature of the girder before welding is determined according to the type, thickness, plate joint and strength requirement of the welding material. Generally, the preheating temperature is between 150℃ and 300℃.

[0003] The patent application with publication number CN116944636B discloses a bridge steel box girder assembling and welding device, which relates to the technical field of welding equipment manufacturing. The welding device comprises a tooling plate, a control box is installed on the upper middle part of the tooling plate, a plurality of spacers are installed on the upper part of the tooling plate on both sides of the control box, the control box is connected to a welding machine through a hydraulic pipeline and wires, a top plate is placed on the spacer, a ceramic gasket is placed below the gap between the two top plates on the control box, after two CO2 gas shielded welding is performed, the welding machine is placed on the two top plates, and the welding machine is used to perform multi-layer filling and surface covering on the weld joint by using submerged arc welding, and after the welding machine welds the weld joint, the generated smoke and flux are extracted by using negative pressure.

[0004] At present, when the steel plates of various parts of the box girder are spliced and welded, the steel plates are transported to the welding site after preheating at a low ambient temperature, which is prone to rapid cooling of the steel plates, thereby affecting the toughness and crack degree of the steel plates after welding. The subsequent constant temperature and heating of the steel plates will result in high energy consumption and low efficiency due to the lack of targetedness, thereby reducing the welding efficiency and increasing the energy consumption cost. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a bridge steel box girder assembling and welding device to achieve the purpose of solving the above problems.

[0006] To achieve the above purpose, the present application realizes the technical scheme as follows: a bridge steel box girder assembling and welding device, comprising a welding support, wherein the outer wall of the welding support is slidably connected with an electric sliding machine B, the electric sliding machine B is fixedly connected with a sliding rail frame, the outer wall of the sliding rail frame is slidably connected with an electric sliding machine A, one side of the electric sliding machine A is fixedly connected with an electric elevator, the inner wall of the electric elevator is slidably connected with a welding machine, the bottom of the welding machine is fixedly connected with a welding head, and a heating mechanism is arranged at the bottom of the welding machine.

[0007] The heating mechanism comprises:

[0008] The annular sleeve is a ring-shaped hollow structure, the top of the annular sleeve is fixedly connected with the bottom of the welding machine, the inner wall of the annular sleeve is fixedly connected with a spring, one end of the spring is fixedly connected with a heat-conducting block, and the annular sleeve is used for lifting the heat-conducting block in the annular sleeve.

[0009] The heating plate is a ring-shaped plate structure, the outer wall of the heat-conducting block is fixedly connected with a heat-conducting plate, the bottom of the heating plate is fixedly connected with the top of the heat-conducting block and the heat-conducting plate, and the bottom of the heat-conducting block is fixedly connected with a heat-conducting pressing plate.

[0010] Preferably, the outer wall of the heat-conducting plate is fixedly connected with a heat preservation sleeve, the top of the heat preservation sleeve is provided with an air inlet groove, and one side of the heat-conducting block is fixedly connected with a gas jet pipe.

[0011] Preferably, the air inlet groove is in communication with the inside of the heat-conducting block through the heat preservation sleeve, and the inside of the heat-conducting block is in communication with the inside of the gas jet pipe.

[0012] Preferably, the bottom of the heat-conducting pressing plate is provided with a heat dissipation groove, and the bottom of the heat preservation sleeve is provided with a heat preservation mechanism.

[0013] Preferably, the heat preservation mechanism comprises a hinged rod, one end of the hinged rod is rotationally connected with the bottom of the heat preservation sleeve, and the other end of the hinged rod is hingedly connected with a connecting block through a rotating ball.

[0014] Preferably, one side of the connecting block is fixedly connected with a heat-conducting sliding plate, and the heat-conducting sliding plate is slidingly connected to the bottom of the heat-conducting pressing plate.

[0015] Preferably, the bottom of the heat-conducting sliding plate is provided with a heat dissipation groove, and the two sides of the heat-conducting sliding plate are fixedly connected with arc-shaped rods.

[0016] Preferably, the number of the heat-conducting pressing plates is four, and the total length of the heat-conducting sliding plate and the connecting block is greater than the distance between each heat-conducting pressing plate.

[0017] The application provides a bridge steel box girder assembling and welding device.

[0018] 1、The heating mechanism is arranged, the next welding point can be heated in advance when the welding head is slowly moved and welded, the whole steel plate can be prevented from being rapidly cooled to not reach the best welding temperature due to a low ambient temperature even after preheating, the strength, crack resistance and toughness of the welded joint are affected, the problem of wasting a large amount of energy and being high in cost and low in efficiency due to reheating of the whole steel plate by the baking gun is avoided, and the problem of the steel plate being rapidly cooled to not reach the best welding temperature due to a low ambient temperature even after preheating is avoided.

[0019] 2、The heating mechanism is arranged, so that the heat conduction clamp is given enough heating time for the position to be welded, and the temperature of the welding point and the surrounding area is quickly heated to the specified welding temperature, avoiding the problem that the temperature cannot rise in time when the heating point and the welding head meet the steel plate at the same time at the beginning of welding, and the strength, crack resistance and toughness of the welded position are affected every time the welding position is lifted and welded;

[0020] 3、The heating mechanism is arranged, so that the moisture in the air within 100mm around the weld is quickly evaporated, preventing the moisture in the air from evaporating to form bubbles during welding, which will break during welding to form pores and cracks, causing the weld quality to decrease, so that the air around the steel plate is heated through the heat dissipation groove during welding, and then the stable low humidity state around the welding point is maintained during the movement of the welding head;

[0021] 4、The heating mechanism is arranged, the air inside the annular sleeve heated by the heating plate is quickly sprayed from the jet pipe to the welding point, and the welding head starts to descend and the heat conduction clamp just contacts the steel plate, so that the welding point is heated in advance, preventing the temperature of the steel from being too low, and the heat conduction speed of the heat conduction clamp when it just contacts the steel is not enough to raise the temperature of the welding point to the normal welding temperature, further preventing the problem that the temperature of the steel plate is too low to affect welding when the welding head and the welding machine are lifted to change the welding point;

[0022] 5、The heat preservation mechanism is arranged, so that the heat conduction slide plate is pushed out to form a ring-shaped heating mode with the heat conduction clamp during welding, to heat the welding point more evenly, ensure the uniformity of the temperature of the welding point, prevent cracks after welding caused by temperature difference, and separate the heat of the heat conduction slide plate from the heat conduction clamp, so that the heat conduction clamp exposes more contact area with air, fully dissipates to the surrounding air during welding, and maintains low air humidity;

[0023] 6、The heat preservation mechanism is arranged, and when the welding head is lifted and not welded, the heating plate continuously heats the heat conduction block and the heat conduction clamp, so that the articulated rod pulls the heat conduction slide plate and the connecting block back into the heat conduction clamp, ensuring that the heat conduction clamp and the heat dissipation groove are in close contact, reducing the contact area with air, preventing heat loss, greatly reducing energy consumption, and the same energy consumption can weld more steel;

[0024] 7. By setting up a heat preservation mechanism, each time the heat-conducting slide plate is pushed out, the gap between the four heat-conducting pressure plates is sealed to form a ring. When the welding head moves to weld, the arc-shaped heat-conducting pressure plate and heat-conducting slide plate simultaneously push the particles on the surface of the steel plate to both sides, keeping the welding point clean and preventing the particles from affecting the welding accuracy. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the welding machine of the present invention;

[0027] Figure 3 This is a schematic diagram of the heating mechanism of the present invention;

[0028] Figure 4 This is a schematic diagram of the heating mechanism of the present invention;

[0029] Figure 5 For the present invention Figure 4 Enlarged view of point A;

[0030] Figure 6 This is a cross-sectional structural diagram of the heating mechanism of the present invention;

[0031] Figure 7 This is a schematic diagram of the disassembly structure of the heating mechanism of the present invention. Figure 1 ;

[0032] Figure 8 This is a schematic diagram of the disassembly structure of the heating mechanism of the present invention. Figure 2 ;

[0033] Figure 9 This is a schematic diagram of the structure of the heat-conducting pressure plate of the present invention;

[0034] Figure 10 This is a schematic diagram of the motion state of the heating mechanism of the present invention. Figure 1 ;

[0035] Figure 11 This is a schematic diagram of the motion state of the heating mechanism of the present invention. Figure 2 ;

[0036] Figure 12 For the present invention Figure 4 Enlarged view of point B;

[0037] Figure 13 This is a schematic diagram of the disassembled structure of the insulation mechanism of the present invention;

[0038] Figure 14 This is a schematic diagram of the movement state of the heat preservation mechanism of the present invention. Figure 1 ;

[0039] Figure 15 The movement state of the heat preservation mechanism of the application is shown in the figure Figure 2 .

[0040] In the figure: 2, welding support; 3, heating mechanism; 301, annular sleeve; 302, spring; 303, heat conduction block; 304, heat conduction plate; 305, heat preservation sleeve; 306, heating plate; 307, heat conduction pressing plate; 308, gas inlet groove; 309, gas jet pipe; 310, heat dissipation groove; 311, connecting block; 4, heat preservation mechanism; 401, hinged rod; 402, rotating ball; 403, heat conduction sliding plate; 404, heat dissipation fine groove; 405, arc-shaped rod; 5, electric sliding machine A; 6, electric elevator; 7, welding machine; 8, electric sliding machine B; 9, sliding rail frame; 10, welding head. DETAILED DESCRIPTION

[0041] Example one: please refer to Figures 1-4 The application provides a technical solution: a bridge steel box girder assembly welding device, which comprises a welding support 2, the welding support 2 is slidably connected with an electric sliding machine B 8, the electric sliding machine B 8 is fixedly connected with a sliding rail frame 9, the sliding rail frame 9 is slidably connected with an electric sliding machine A 5, one side of the electric sliding machine A 5 is fixedly connected with an electric elevator 6, the electric elevator 6 is slidably connected with a welding machine 7, the welding machine 7 is fixedly connected with a welding head 10 at the bottom, and the welding machine 7 is provided with a heating mechanism 3 at the bottom.

[0042] The heating mechanism 3 comprises:

[0043] The annular sleeve 301 is a hollow ring structure, the annular sleeve 301 is fixedly connected with the welding machine 7 at the top, the inner wall of the annular sleeve 301 is fixedly connected with a spring 302, one end of the spring 302 is fixedly connected with a heat conduction block 303, and the annular sleeve 301 is used to lift the heat conduction block 303 in it;

[0044] The heating plate 306 is a ring-shaped plate structure, the outer wall of the heat conduction block 303 is fixedly connected with a heat conduction plate 304, the bottom of the heating plate 306 is fixedly connected with the heat conduction block 303 and the top of the heat conduction plate 304, and the bottom of the heat conduction block 303 is fixedly connected with a heat conduction pressing plate 307; the heating plate 306 is used to heat the heat conduction block 303 and the heat conduction plate 304;

[0045] In use, the steel plates of the steel box girder are placed at the bottom of the welding support 2, and then the electric sliding machine B8 is started to slide on the welding support 2, and the slide rail frame 9 is moved synchronously, while the electric sliding machine A5 is started to control the electric elevator 6 and the welding machine 7 to slide on the slide rail frame 9, so that the welding machine 7 moves to the welding position between the two steel plates, and then the electric elevator 6 is started to control the welding machine 7 to descend to the welding point, and then the welding machine 7 is started to weld the weld through the welding head 10, and during the welding, the electric sliding machine B8 and the electric sliding machine A5 are controlled to control the welding machine 7 to move uniformly on the weld.

[0046] Embodiment two: please refer to Figures 1-11 On the basis of embodiment one, the application provides a technical solution: the outer wall of the heat conduction plate 304 is fixedly connected with a heat preservation sleeve 305, the top of the heat preservation sleeve 305 is provided with an air inlet groove 308, and one side of the heat conduction block 303 is fixedly connected with a gas jet pipe 309.

[0047] The air inlet groove 308 is in communication with the inside of the heat conduction block 303 through the heat preservation sleeve 305, and the inside of the heat conduction block 303 is in communication with the inside of the gas jet pipe 309.

[0048] The bottom of the heat conduction pressing plate 307 is provided with a heat dissipation groove 310, and the bottom of the heat preservation sleeve 305 is provided with a heat preservation mechanism 4.

[0049] Before welding, the heating plate 306 needs to be started in advance to quickly heat the heat conduction block 303 and the heat conduction plate 304, and the heat conduction plate 304 is arranged to quickly absorb the heat of the heating plate 306, so that the heat of the heating plate 306 can quickly enter the entire heat conduction block 303 and be transmitted to the bottom of the heat conduction block 303, and the heat of the bottom of the heat conduction block 303 is quickly transmitted to the heat conduction pressing plate 307 below, so that when the welding machine 7 is descending for welding, the four heat conduction pressing plates 307 contact the surfaces of the two steel plates below, and the heat is quickly transmitted to the two steel plates in advance and around the welding head 10 in the middle, so that the heat is quickly transmitted to the welding point and the steel plates around the welding point in four directions, and at the same time when the welding machine 7 and the welding head 10 are moved to weld the weld, the four heat conduction pressing plates 307 still stably and continuously heat the surrounding of the weld, so that when the welding head 10 is slowly moved for welding, the next welding point can be heated in advance, so as to prevent the entire steel plate from being cooled too quickly due to the low ambient temperature after preheating, which affects the strength, crack resistance and toughness of the welding joint, and the steel plate does not need to be heated again by the torch, which saves a lot of energy and avoids high cost and low efficiency.

[0050] When the heat-conducting plate 307 is in contact with the steel material, as the welding head 10 continues to descend to the welding point for welding, the heat-conducting plate 307 is in contact with the steel plate at this time, and the welding machine 7 and the welding head 10 are lowered synchronously by pushing the annular sleeve 301, so that the heat-conducting plate 307, the heat-conducting block 303, and the heat-insulating sleeve 305 start to slide into the annular sleeve 301 and press the spring 302 in the annular sleeve 301 to deform, until the welding head 10 descends to the welding point and starts to weld, then the heat-conducting block 303, the heat-insulating sleeve 305, and the heat-conducting plate 307 stop sliding in the annular sleeve 301, so that when the welding head 10 starts to descend to weld the steel plate of the steel box girder, the heat-conducting plate 307 keeps in contact with the steel plate during the time when the heat-conducting block 303 slides into the annular sleeve 301 and the welding head 10 descends, so that the heat-conducting plate 307 is preheated to the welding position for a sufficient time, and the welding point and the surrounding temperature are quickly heated to the specified welding temperature, avoiding the problem that the temperature cannot be raised in time when the heating point and the welding head 10 contact the steel plate at the same time, and the strength, crack resistance, and toughness of the welded position are affected when the welding position is changed and the welding is started again;

[0051] As the welding head 10 moves for welding, the heat-conducting plate 307 constantly heats and keeps the temperature of the steel plate around the weld, preventing the temperature from decreasing, and the heat-conducting plate 307 is stably and quickly cooled to the surrounding air through the several heat dissipation grooves 310 at the bottom of the heat-conducting plate 307, so that the air within one hundred millimeters around the weld is quickly heated by the large contact area of the several heat dissipation grooves 310 and the air, and the moisture in the air within one hundred millimeters around the weld is quickly evaporated, thereby preventing the water vapor in the air from evaporating to produce bubbles during welding, which will break and form pores and cracks, causing the quality of the weld to decrease, so that the air around the weld is heated by the heat dissipation grooves 310 during welding, and then a stable low-humidity state is maintained around the weld during the welding of the welding head 10;

[0052] When the welding head 10 is lowered, the heat preservation sleeve 305 and the heat conducting block 303 slide up in the inner wall of the annular sleeve 301, and the air in the closed space in the annular sleeve 301 is squeezed into the air inlet groove 308 in the heat preservation sleeve 305, enters the heat conducting block 303 through the air inlet groove 308, and is sprayed out from the air jet pipe 309 on one side of the heat conducting block 303. The air heated by the heating plate 306 in the annular sleeve 301 is quickly sprayed out from the air jet pipe 309 aimed at the welding point, so that the welding head 10 starts to be lowered and the heat conducting pressure plate 307 just contacts the steel plate to heat. At this time, the welding point is preheated to prevent the temperature of the steel material from being too low. The heat conduction speed of the heat conducting pressure plate 307 when it just contacts the steel material is not enough to cause the temperature of the welding point to rise to the normal welding temperature. Further, the problem of affecting welding due to the low temperature of the steel plate itself when the welding head 10 and the welding machine 7 are lifted to replace the welding point is prevented.

[0053] Example three: please refer to Figures 1-15 On the basis of example one and example two, the application provides a technical solution: the heat preservation mechanism 4 includes a hinged rod 401, one end of the hinged rod 401 is rotationally connected with the bottom of the heat preservation sleeve 305, and the other end of the hinged rod 401 is hingedly connected with the connecting block 311 through a rotating ball 402.

[0054] One side of the connecting block 311 is fixedly connected with a heat conducting sliding plate 403, and the heat conducting sliding plate 403 is slidingly connected at the bottom of the heat conducting pressure plate 307.

[0055] The bottom of the heat conducting sliding plate 403 is provided with a heat dissipation fine groove 404, and the two sides of the heat conducting sliding plate 403 are fixedly connected with arc-shaped rods 405.

[0056] The number of the heat conducting pressure plates 307 is four, and the total length of the heat conducting sliding plate 403 and the connecting block 311 is greater than the distance between each heat conducting pressure plate 307;

[0057] And in each time the welding machine 7 up to replace the welding point, and again to drop the welding, the heat block 303, heat preservation sleeve 305 will be in the annular sleeve 301 inner wall sliding, so that the welding machine 7 and the welding head 10 drop to weld the weld, when the heat block 303, heat preservation sleeve 305 sliding into the annular sleeve 301, the distance between the bottom of the annular sleeve 301 and the heat plate 307 is shortened, because the heat slide plate 403 and the connecting block 311 are located in the inner wall of the heat plate 307, so when the distance between the connecting block 311 and the annular sleeve 301 is shortened, the hinge rod 401 between them will start to rotate and push the connecting block 311 and the heat slide plate 403 along the inner wall of the heat plate 307, and start to slide out of the heat plate 307, until the welding head 10 drops to the weld position for welding, at this time the connecting block 311 and the heat slide plate 403 slide out and reach another heat plate 307, while the tail of the heat slide plate 403 is still in the previous heat plate 307, forming a bolt type form;

[0058] By inserting the heat slide plate 403 and the connecting block 311 between the left and right heat plates 307, the gap between the two heat plates 307 is sealed, so that the heat slide plate 403 is pushed out and the heat plate 307 forms a ring shape during welding, which can heat the weld point more evenly, ensure the uniformity of the weld point temperature, prevent cracks caused by temperature difference after welding, and separate the heat slide plate 403 from the heat plate 307, so that the heat plate 307 exposes more contact area with air, fully dissipates to the surrounding air during welding, maintains low air humidity, and when the welding head 10 is lifted and not welded, the heat plate 306 is continuously heated to the heat block 303 and the heat plate 307, so the hinge rod 401 pulls the heat slide plate 403 and the connecting block 311 back to the heat plate 307, ensuring that the heat plate 307 and the heat sink groove 310 are in close contact, reducing the contact area with air, thereby preventing heat loss and greatly reducing energy consumption. With the same energy consumption, more steel can be welded;

[0059] When one heat slide plate 403 and connecting block 311 are pushed out, they are connected to each heat slide plate 403 through the arc-shaped rod 405, so that each heat slide plate 403 is pushed out to close the gap between the four heat plates 307, forming a circular ring, which can push the particles on the surface of the steel plate to both sides during the movement of the welding head 10, keeping the welding point clean and preventing the particles from affecting the welding precision.

[0060] The above merely describes preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes within the technical scope disclosed by the present application and according to the technical solutions and inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A bridge steel box girder assembly and welding device, comprising a welding bracket (2), wherein an electric sliding machine B (8) is slidably connected to the outer wall of the welding bracket (2), a slide rail frame (9) is fixedly connected to the electric sliding machine B (8), an electric sliding machine A (5) is slidably connected to the outer wall of the slide rail frame (9), an electric lifting machine (6) is fixedly connected to one side of the electric sliding machine A (5), a welding machine (7) is slidably connected to the inner wall of the electric lifting machine (6), and a welding head (10) is fixedly connected to the bottom of the welding machine (7), characterized in that: The welding machine (7) is provided with a heating mechanism (3) at the bottom; The heating mechanism (3) comprises: An annular sleeve (301) is annular and hollow, and the top of the annular sleeve (301) is fixedly connected with the bottom of the welding machine (7), the inner wall of the annular sleeve (301) is fixedly connected with a spring (302), one end of the spring (302) is fixedly connected with a heat-conducting block (303), and the annular sleeve (301) is used for lifting the heat-conducting block (303) in it; A heating plate (306) is annular and plate-shaped, the outer wall of the heat-conducting block (303) is fixedly connected with a heat-conducting plate (304), the bottom of the heating plate (306) is fixedly connected with the top of the heat-conducting block (303) and the heat-conducting plate (304), and the bottom of the heat-conducting block (303) is fixedly connected with a heat-conducting pressing plate (307), which is used for heating the heat-conducting block (303) and the heat-conducting plate (304); The outer wall of the heat-conducting plate (304) is fixedly connected with a heat preservation sleeve (305), the top of the heat preservation sleeve (305) is provided with an air inlet groove (308), and one side of the heat-conducting block (303) is fixedly connected with a gas jet pipe (309); The air inlet groove (308) is in communication with the inside of the heat-conducting block (303) through the heat preservation sleeve (305), and the inside of the heat-conducting block (303) is in communication with the inside of the gas jet pipe (309); The bottom of the heat-conducting pressing plate (307) is provided with a heat dissipation groove (310), and the bottom of the heat preservation sleeve (305) is provided with a heat preservation mechanism (4); The heat preservation mechanism (4) comprises a hinged rod (401), one end of the hinged rod (401) is rotatably connected with the bottom of the heat preservation sleeve (305), and the other end of the hinged rod (401) is hingedly connected with a connecting block (311) through a rotating ball (402); One side of the connecting block (311) is fixedly connected with a heat-conducting sliding plate (403), and the heat-conducting sliding plate (403) is slidingly connected to the bottom of the heat-conducting pressing plate (307).

2. The bridge steel box girder assembling and welding device according to claim 1, characterized in that: The bottom of the heat-conducting sliding plate (403) is provided with a heat dissipation groove (404), and the two sides of the heat-conducting sliding plate (403) are fixedly connected with arc-shaped rods (405).

3. The bridge steel box girder assembling and welding device according to claim 2, characterized in that: The number of the heat-conducting pressing plates (307) is four, and the total length of the heat-conducting sliding plate (403) and the connecting block (311) is greater than the distance between each heat-conducting pressing plate (307).

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