Bridge steel box girder internal welding ventilation equipment

Abstract

The utility model relates to welding equipment technical field discloses a kind of bridge steel box girder internal welding ventilation equipment, including machine body, the top of the machine body is fixedly connected with air inlet pipe, the end of the air inlet pipe is fixedly connected with air inlet cover, the bottom of the machine body is installed with wheel, the middle part of the machine body is installed with ventilation mechanism, the outside of the machine body is installed with exhaust hood, the inside of the exhaust hood is installed with exhaust mechanism, the exhaust mechanism includes push assembly and clamping assembly, the clamping assembly includes clamping block, the clamping block is slidably connected in the inside of the exhaust hood.In the utility model, by the extrusion of machine body and the movement of clamping block, the clamping block is inserted into the clamping groove, and under the action of spring one, the clamping block is clamped with the clamping groove, the exhaust hood is installed on the outside of the machine body, the gas purified in the machine body is discharged into the bridge steel box, and the harmful substances remaining in the discharged gas are reduced to harm the human body in airtight environment.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, and in particular to a ventilation device for internal welding of bridge steel box girders. Background Technology

[0002] During welding inside bridge steel box girders, ozone and nitrogen oxides are generated by the electric arc. These gases have strong oxidizing properties. At the same time, metal oxide particles such as iron and manganese oxides are produced when the metal melts. These are inhalable particulate matter, and some contain heavy metals. Long-term inhalation may lead to pneumoconiosis, metal poisoning, and irritation to the respiratory tract and eyes. Welding fume extractors are usually used to absorb, purify, and ventilate the welding gases during welding inside bridge steel box girders.

[0003] Welding fume purifiers are local air purification devices designed specifically for metal processing such as welding and cutting. They are mainly used to filter fumes, dust and harmful gases generated during welding, protect the health of operators and improve the working environment. They are widely used in industrial processing such as welding, cutting, laser engraving, 3D printing and other processes. They use negative pressure to directly draw the fumes into the purifier to prevent gas diffusion.

[0004] Smoke purifiers are mainly used for adsorption of small molecule gases and particulate matter. They are not very effective at purifying highly toxic gases such as chlorine and cyanide. Special catalytic filters are required to adsorb these toxic gases. In the semi-sealed environment inside the box girder, some harmful substances remain in the gas discharged by the purifier, which can still cause harm to the human body. Therefore, a welded ventilation device for the inside of bridge steel box girders is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a ventilation device for welding inside a bridge steel box girder, which aims to improve the problem that in the prior art, the exhaust port of the welding fume purifier exhausts gas inside the box girder, and the filtered gas contains toxic substances that may harm the human body.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A ventilation device for welding inside a steel box girder of a bridge includes a body, an air inlet pipe fixedly connected to the top of the body, an air inlet hood fixedly connected to the end of the air inlet pipe, wheels installed at the bottom of the body, a ventilation mechanism installed in the middle of the body, an exhaust hood installed on the outside of the body, and an exhaust mechanism installed inside the exhaust hood.

[0008] The exhaust mechanism includes a pushing component and a snap-fit ​​component. The snap-fit ​​component includes a snap-fit ​​block, which is slidably connected inside the exhaust hood. A snap-fit ​​groove is provided in the middle of the body, and the snap-fit ​​block snaps into the snap-fit ​​groove. An exhaust pipe is fixedly connected to the outside of the exhaust hood.

[0009] As a further description of the above technical solution:

[0010] The pushing component includes a button, which is slidably connected to the middle part of the body. A groove is provided in the middle part of the body, and the button is slidably connected inside the groove. The top of the button is tightly fitted to the end of the locking block.

[0011] As a further description of the above technical solution:

[0012] A fixing block is fixedly connected to the outside of the button, and a limit groove is opened inside the body. The fixing block is slidably connected inside the limit groove.

[0013] As a further description of the above technical solution:

[0014] The exhaust hood has a second sliding groove inside, the locking block is slidably connected inside the second sliding groove, and a spring is installed inside the second sliding groove;

[0015] As a further description of the above technical solution:

[0016] The ventilation mechanism includes a rotating component and a fixed component. The rotating component includes a fixed shaft, which is fixedly connected to the middle of the machine body. A rotating block is rotatably connected to the outer periphery of the fixed shaft. A ventilation window is fixedly connected to the end of the rotating block, and a ventilation hole is provided in the middle of the ventilation window.

[0017] As a further description of the above technical solution:

[0018] A torsion spring is fitted around the outer periphery of the fixed shaft, and the two ends of the torsion spring are respectively fixedly connected to the inside of the machine body and the ventilation window;

[0019] As a further description of the above technical solution:

[0020] The fixing component includes a plug, which is slidably connected to the inside of the body. An insertion hole is provided on the outer side of the ventilation window, and the plug engages with the insertion hole.

[0021] As a further description of the above technical solution:

[0022] A slider is fixedly connected to the outside of the insert block, and a three-slide groove is provided on the outside of the machine body. The slider is slidably connected inside the three-slide groove, and a spring is installed inside the machine body.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the machine body squeezes and moves the card block, causing the card block to insert into the card slot. Under the action of spring one, the card block engages with the card slot, and the exhaust hood is installed on the outside of the machine body. The purified gas drawn into the machine body is discharged into the bridge steel box, reducing the harm to the human body caused by residual toxic substances in the discharged gas in a closed environment.

[0025] 2. In this utility model, by moving the slider, the insert block is moved and separated from the socket. The vent window opens quickly under the action of the torsion spring, allowing the internal filter screen to be replaced quickly. After replacement, rotating the vent window squeezes the insert block to move. The moving insert block squeezes the second spring. After the vent window fits against the machine body, the insert block quickly engages with the socket under the action of the second spring, thus fixing the vent window to the machine body. This allows the filter screen to filter welding gases, reducing harm to the human body and the environment. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of an internal welding ventilation device for a bridge steel box girder proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of a button for a welded ventilation device inside a bridge steel box girder, as proposed in this utility model.

[0028] Figure 3 This is a cross-sectional structural schematic diagram of an exhaust hood for a welded ventilation device inside a bridge steel box girder, as proposed in this utility model.

[0029] Figure 4 This is a schematic diagram of the structure of a ventilation window for an internal welding ventilation device for a bridge steel box girder, as proposed in this utility model.

[0030] Figure 5 This is a schematic diagram of the torsion spring structure of the internal welding ventilation device for a bridge steel box girder proposed in this utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the insert block for the internal welding ventilation equipment of a bridge steel box girder proposed in this utility model.

[0032] Legend:

[0033] 1. Body; 2. Intake pipe; 3. Intake hood; 4. Wheel; 5. Exhaust hood; 6. Button; 7. Fixing block; 8. Limiting groove; 9. Slide groove one; 10. Locking block; 11. Spring one; 12. Slide groove two; 13. Locking groove; 14. Fixing shaft; 15. Torsion spring; 16. Rotating block; 17. Vent window; 18. Vent hole; 19. Insertion hole; 20. Insertion block; 21. Spring two; 22. Slider; 23. Slide groove three; 24. Exhaust pipe. Detailed Implementation

[0034] 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.

[0035] Reference Figures 1-3 This utility model provides an embodiment of a ventilation device for welding inside a bridge steel box girder, comprising a body 1. For welding ventilation inside bridge steel box girders, a fume extractor is usually used to absorb and purify the welding gases, reducing the harm of welding gases to the human body. The body 1 includes equipment components such as an air filter bag, a graphite filter, and an axial flow fan, all of which are existing technologies and are not improvements of this application, so they will not be described in detail here. An air inlet pipe 2 is fixedly connected to the top of the body 1, and an air inlet hood 3 is fixedly connected to the end of the air inlet pipe 2. External gas is drawn in through the air inlet hood 3. The air inlet hood 3 is designed to be larger than the air inlet pipe 2 to better absorb welding gases. The gas enters the interior of the body 1 through the air inlet pipe 2. Wheels 4 are installed at the bottom of the body 1, which facilitates the movement of the equipment and can adapt to various environments. A ventilation mechanism is installed in the middle of the body 1, through which the purified gas inside the body 1 is discharged. An exhaust hood 5 is installed on the outside of the body 1, and an exhaust mechanism is installed inside the exhaust hood 5 to discharge the discharged gas into a suitable environment.

[0036] The exhaust mechanism includes a pushing component and a locking component. The locking component includes a locking block 10, which is slidably connected inside the exhaust hood 5. A locking groove 13 is provided in the middle of the body 1, and the locking block 10 engages with the locking groove 13. By bringing the exhaust hood 5 close to the body 1, the body 1 can press the locking block 10 to move, and the moving locking block 10 can be inserted into the locking groove 13 for locking, allowing the exhaust hood 5 to be quickly connected to the body 1. A second sliding groove 12 is provided inside the exhaust hood 5, and the locking block 10 is slidably connected inside the second sliding groove 12. A first spring 11 is installed inside the second sliding groove 12. When the exhaust hood 5 is installed, the body 1 presses the locking block 10, causing the locking block 10 to move inside the second sliding groove 12 and press the first spring 11. At this time, the locking block 10 engages with the locking groove 13. With slots 13 aligned, the locking block 10 can be inserted into slot 13. Under the action of spring 11, the locking block 10 rebounds and engages with slot 13, allowing the exhaust hood 5 to be installed on the outside of the body 1. Alternatively, the locking block 10 can be moved to squeeze spring 11, separating the locking block 10 from slot 13 and removing the exhaust hood 5 for easy and quick disassembly and carrying. An exhaust pipe 24 is fixedly connected to the outside of the exhaust hood 5. The existing filter bag and graphite filter inside the body 1 can only adsorb a large amount of dust and particulate matter. For harmful gases such as carbon monoxide, a specific catalytic filter is required for treatment. The exhaust gas can be discharged into the box beam through the exhaust pipe 24, reducing the harm of toxic gases caused by the semi-enclosed environment and greatly improving safety.

[0037] The pushing component includes a button 6, which is slidably connected to the middle of the body 1. A fixing block 7 is fixedly connected to the outside of the button 6. A limiting groove 8 is opened inside the body 1. Pressing the button 6 moves the fixing block 7. The limiting groove 8 guides and limits the button 6. The fixing block 7 is slidably connected inside the limiting groove 8. A sliding groove 9 is opened in the middle of the body 1. The button 6 is slidably connected inside the sliding groove 9. The top of the button 6 is tightly fitted with the end of the locking block 10. Pressing the button 6 can push the locking block 10 to move. When the locking block 10 moves and separates from the locking groove 13, the exhaust cover 5 and exhaust pipe 24 can be removed for storage, making it convenient to carry and greatly improving work efficiency.

[0038] Reference Figure 1 , Figure 4 , Figure 5 and Figure 6The ventilation mechanism includes a rotating component and a fixed component. The rotating component includes a fixed shaft 14, which is fixedly connected to the middle of the machine body 1. A rotating block 16 is rotatably connected to the outer periphery of the fixed shaft 14. A ventilation window 17 is fixedly connected to the end of the rotating block 16. The ventilation window 17 can be opened by rotating the rotating block 16 outside the fixed shaft 14, allowing the graphite filter screen installed inside the ventilation window 17 to be removed for quick replacement. Failure to replace the filter screen for a long time will reduce the filtration efficiency of welding gases, which will greatly harm human health and the environment. A ventilation hole 18 is provided in the middle of the ventilation window 17, through which the purified gas is discharged. A torsion spring 15 is sleeved on the outer periphery of the fixed shaft 14. The two ends of the torsion spring 15 are fixedly connected to the inside of the machine body 1 and the ventilation window 17, respectively. The torsion spring 15 can make the ventilation window 17 pop out quickly, improving the replacement efficiency.

[0039] The fixing component includes a plug 20, which is slidably connected inside the body 1. A hole 19 is provided on the outer side of the vent 17, and the plug 20 engages with the hole 19. After replacing the internal filter of the vent 17, the vent 17 can be rotated to first press the plug 20, and then the plug 20 engages with the hole 19, thus fixing the vent 17 in place. A slider 22 is fixedly connected to the outer side of the plug 20. A groove 23 is provided on the outer side of the body 1, and the slider 22 is slidably connected to the inner side of the groove 23. The machine body 1 is equipped with a second spring 21. When the ventilation window 17 is inserted into the middle of the machine body 1, it first squeezes the insertion block 20 to retract. The insertion block 20 moves to squeeze the second spring 21. When the ventilation window 17 is fully closed, the insertion block 20 moves under the action of the second spring 21 to engage and fix with the insertion hole 19. The insertion block 20 can be moved and separated from the insertion hole 19 by sliding the slider 22. The ventilation window 17 opens quickly under the action of the torsion spring 15, which allows for the replacement of the filter screen and greatly improves work efficiency.

[0040] Working principle: First, slide slider 22 moves insert 20 to separate it from socket 19. Vent window 17 opens quickly under the action of torsion spring 15, allowing for rapid replacement of the internal filter. After replacement, rotate vent window 17 to press insert 20, which in turn presses spring 21. When vent window 17 is in contact with body 1, insert 20 quickly engages with socket 19 under the action of spring 21, fixing vent window 17 to body 1. This allows the filter to filter welding gases, reducing harm to humans and the environment. Then, move exhaust hood 5 closer to body 1. Body 1 presses and moves locking block 10, causing it to press spring 11. Simultaneously, locking block 10 aligns with slot 13, inserting it into the slot. Under the action of spring 11, locking block 10 engages with slot 13, installing exhaust hood 5 on the outside of body 1. This discharges toxic gases from the steel box, reducing harm to humans and significantly improving safety.

[0041] After the welding work is completed, the button 6 can be pressed to move the locking block 10. The moving locking block 10 separates from the slot 13, and the exhaust cover 5 and exhaust pipe 24 can be removed for storage and carrying, which improves work efficiency.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A ventilation device for internal welding of a bridge steel box girder, comprising a body (1), characterized in that: An air inlet pipe (2) is fixedly connected to the top of the body (1), an air inlet cover (3) is fixedly connected to the end of the air inlet pipe (2), wheels (4) are installed at the bottom of the body (1), a ventilation mechanism is installed in the middle of the body (1), an exhaust cover (5) is installed on the outside of the body (1), and an exhaust mechanism is installed inside the exhaust cover (5). The exhaust mechanism includes a pushing component and a snap-fit ​​component. The snap-fit ​​component includes a snap-fit ​​block (10), which is slidably connected inside the exhaust hood (5). A snap-fit ​​groove (13) is provided in the middle of the body (1). The snap-fit ​​block (10) snaps into the snap-fit ​​groove (13). An exhaust pipe (24) is fixedly connected to the outside of the exhaust hood (5).

2. The bridge steel box girder internal welding ventilation device according to claim 1, characterized in that: The pushing component includes a button (6), which is slidably connected to the middle part of the body (1). A groove (9) is provided in the middle part of the body (1). The button (6) is slidably connected inside the groove (9). The top of the button (6) is tightly fitted to the end of the card block (10).

3. The bridge steel box girder internal welding ventilation device according to claim 2, characterized in that: A fixing block (7) is fixedly connected to the outside of the button (6), and a limiting groove (8) is opened inside the body (1). The fixing block (7) is slidably connected inside the limiting groove (8).

4. The bridge steel box girder internal welding ventilation device according to claim 1, characterized in that: The exhaust hood (5) has a second sliding groove (12) inside, and the locking block (10) is slidably connected inside the second sliding groove (12). A spring (11) is installed inside the second sliding groove (12).

5. The bridge steel box girder internal welding ventilation device according to claim 1, characterized in that: The ventilation mechanism includes a rotating component and a fixed component. The rotating component includes a fixed shaft (14), which is fixedly connected to the middle part of the body (1). A rotating block (16) is rotatably connected to the outer periphery of the fixed shaft (14). A ventilation window (17) is fixedly connected to the end of the rotating block (16), and a ventilation hole (18) is opened in the middle of the ventilation window (17).

6. The bridge steel box girder internal welding ventilation device according to claim 5, characterized in that: A torsion spring (15) is fitted around the outer periphery of the fixed shaft (14), and the two ends of the torsion spring (15) are respectively fixedly connected to the inside of the body (1) and the ventilation window (17).

7. The bridge steel box girder internal welding ventilation device according to claim 5, characterized in that: The fixing component includes a plug (20), which is slidably connected to the inside of the body (1). The outside of the ventilation window (17) is provided with a socket (19), and the plug (20) engages with the socket (19).

8. The bridge steel box girder internal welding ventilation device according to claim 7, characterized in that: A slider (22) is fixedly connected to the outside of the insert (20), and a three-slide groove (23) is opened on the outside of the body (1). The slider (22) is slidably connected inside the three-slide groove (23), and a spring (21) is installed inside the body (1).

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