A flue gas treatment device for welded pipe unit

Abstract

This utility model belongs to the technical field of welding pipe unit supporting equipment, specifically relating to a welding pipe unit flue gas treatment device. It includes a collection device, installed above the welding pipe unit, comprising a gas collection hood and an exhaust pipe connected to the hood. The gas collection hood has several baffles spaced apart along the first direction of welding advance of the welding pipe unit, dividing the hood into several gas collection zones. The exhaust pipe has several connecting pipes spaced apart, with the diameter of the connecting pipes gradually decreasing along the first direction. The input end of a suction device is connected to the end of the exhaust pipe with the larger diameter. The input end of a filter device is connected to the output end of the suction device. This utility model solves the problem of flue gas recovery in welding pipe units. By setting the diameter of the connecting pipes to gradually decrease, the negative pressure in the connecting pipes farther from the suction device can be increased to an effective range, ensuring that the negative pressure in the connecting pipes closer to the suction device is stable within the same range, thus generating a large, stable, and uniform negative pressure in the gas collection hood.

Description

Technical Field

[0001] This utility model belongs to the technical field of welding pipe unit supporting equipment, specifically relating to a welding pipe unit flue gas treatment device. Background Technology

[0002] A welded pipe unit is a complete set of equipment used to produce welded steel pipes from steel strips or plates through continuous rolling, forming, welding, and sizing processes. During the welding process, the steel strip is rolled into a tubular shape by forming rollers, and the joint is melted and extruded by a welding heat source. Subsequent processes such as cooling, straightening, and flaw detection ensure product quality. Because the high-temperature electric arc and metal evaporation generated during welding are accompanied by the release of a large amount of fumes and harmful gases, a flue gas purification system is required to meet environmental protection and occupational health requirements.

[0003] Currently, the main treatment method is ventilation collection, which focuses on local exhaust ventilation, such as suction arms and fume hoods. These need to be installed within 30cm of the welding point, and the wind speed needs to reach a certain level to effectively capture the flue gas.

[0004] However, suction arms typically have a small collection range, making it easy for fumes to escape. Suction arms cannot completely extract all the fumes. Fume hoods can cover a large area of ​​the welding point, but because of their large openings, only the central area of ​​the fume hood has a strong suction force, while other parts cannot effectively generate suction, resulting in poor fume collection. Utility Model Content

[0005] To address the shortcomings of existing technologies, a flue gas treatment device for welded pipe units is provided to solve the problem of flue gas recovery in welded pipe units.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A flue gas treatment device for welded pipe units, comprising:

[0007] A collection device is installed above the welded pipe unit. The collection device includes a gas collecting hood and an exhaust pipe connected to the gas collecting hood. The gas collecting hood is provided with several baffles at intervals along the first direction of the welded pipe unit's welding advance to divide the gas collecting hood into several gas collecting areas. Several connecting pipes are provided at intervals on the exhaust pipe. One end of each connecting pipe is connected to the exhaust pipe, and the other end is connected to the gas collecting area. The diameter of the connecting pipes gradually decreases along the first direction.

[0008] A suction device, the input end of which is connected to the larger diameter end of the exhaust pipe;

[0009] A filtration device, the input of which is connected to the output of the suction device.

[0010] Compared with existing technologies, the above technical solutions have the following beneficial effects:

[0011] By covering the welding position of the pipe welding unit with a gas collection hood, the hood can cover a large area and collect as much welding fume as possible. At the same time, the hood is divided into several gas collection zones by partitions. Connecting pipes connect the gas collection zones and the exhaust pipe. By setting the diameter of the connecting pipe to gradually decrease, the negative pressure in the connecting pipe away from the suction device can be increased to an effective range, ensuring that the negative pressure in the connecting pipe closer to the suction device is stable within the same range. This keeps the negative pressure in each gas collection zone of the lower hood within the same range, so that a large, stable and uniform negative pressure can be generated in the hood, maintaining a good suction effect.

[0012] Based on the above technical solution, the embodiments of this application can be further improved as follows:

[0013] In one embodiment, a filter element is provided in the gas collection hood below the partition, the filter element being used to separate each of the gas collection zones.

[0014] It facilitates the generation of negative pressure in the gas collection zone, improving the adsorption effect, while the filter can also preliminarily filter impurities in the flue gas.

[0015] In one embodiment, the exhaust pipe includes a plurality of exhaust sections connected in sequence, the diameter of which gradually decreases along a first direction.

[0016] By setting the exhaust pipe at a variable diameter location with a gradually decreasing diameter, the exhaust section of the exhaust pipe, which is far from the suction device, is more likely to generate a larger negative pressure, thereby improving the adsorption effect and further balancing the negative pressure adsorption effect in the entire gas collection hood.

[0017] In one embodiment, the filtration device includes:

[0018] A tank containing filtrate, wherein an air outlet is provided on the tank above the surface of the filtrate;

[0019] The air inlet pipe has one end connected to the output end of the suction device and the other end extending into the bottom of the tank.

[0020] In one embodiment, an air distribution plate is provided at the other end of the air intake pipe, and a plurality of multi-hole nozzles are provided at the bottom of the air distribution plate.

[0021] In one embodiment, a drain pipe is provided at the bottom of the tank, and an outlet valve is provided on the drain pipe.

[0022] In one embodiment, the thickness of the partition is set to gradually increase from bottom to top.

[0023] In one embodiment, the input and output ends of the suction device are respectively provided with filter screens. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0026] Figure label:

[0027] 1. Collection device; 2. Suction device; 3. Filtering device; 4. Filter screen; 5. Welded pipe unit;

[0028] 101. Gas collection hood; 102. Exhaust pipe; 103. Connecting pipe; 104. Baffle; 105. Gas collection area; 106. Filter screen; 1021. Exhaust section; 1022. Reducer;

[0029] 301. Tank body; 302. Air outlet; 303. Air inlet pipe; 304. Air distribution plate; 305. Nozzle; 306. Drain pipe; 307. Liquid inlet. Detailed Implementation

[0030] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0031] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0032] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] Example

[0036] like Figure 1 As shown, the flue gas treatment device for a welded pipe unit 5 provided by this utility model includes: a collection device 1, a suction device 2, and a filter device 3.

[0037] The collecting device 1 is installed above the welded pipe unit 5, which includes a roller group for conveying steel strips and rolling them into shape, and welding equipment for welding. In this embodiment, the collecting device 1 is located at the welding equipment of the welded pipe unit 5 and is used to collect welding fumes. The specific welding equipment is not shown in the figure.

[0038] The collecting device 1 includes a gas collecting hood 101 and an exhaust pipe 102 connected to the gas collecting hood 101. The exhaust pipe 102 is horizontally positioned at the top of the gas collecting hood 101, passing through all areas above the gas collecting hood 101. Several partitions 104 are spaced apart in the gas collecting hood 101 along a first direction of welding advance of the pipe welding unit 5, wherein the first direction is a horizontal direction from left to right in the figure, to divide the gas collecting hood 101 into several gas collecting zones 105. The gas collecting hood 101 is fixed above the pipe welding unit 5 by a frame. In this embodiment, three partitions 104 are provided, and the gas collecting zones 105 are divided into several gas collecting areas. Divided into four sections, the exhaust pipe 102 is provided with a plurality of connecting pipes 103 at intervals. Correspondingly, there are four connecting pipes 103. One end of each connecting pipe 103 is connected to the exhaust pipe 102, and the other end is connected to the gas collection area 105. The diameter of the connecting pipes 103 gradually decreases along the first direction, that is, the diameter of each of the four connecting pipes 103 is different, and the diameter of each connecting pipe 103 decreases sequentially and is arranged sequentially along the first direction. The connecting pipes 103 are connected to the exhaust pipe 102, and the smoke from each gas collection area 105 in the gas collection hood 101 is drawn away accordingly.

[0039] The input end of the suction device 2 is connected to the larger diameter end of the exhaust pipe 102, and the input end of the filter device 3 is connected to the output end of the suction device 2. The suction device 2 is used to draw the flue gas into the filter device 3 for filtration. The suction device 2 can be implemented by means of a vacuum pump or the like.

[0040] The gas collection hood 101 is used to cover the welding position of the pipe welding unit 5. The gas collection hood 101 can cover a large area and collect as much welding fume as possible. At the same time, the gas collection hood 101 is divided into several gas collection zones 105 by the partition 104. The gas collection zones 105 and the exhaust pipe 102 are connected by the connecting pipe 103. By setting the diameter of the connecting pipe 103 to gradually decrease, the negative pressure of the connecting pipe 103 away from the suction device 2 can be increased to an effective range, ensuring that the negative pressure in the connecting pipe 103 near the suction device 2 is stable within the same range. In this way, the negative pressure of each gas collection zone 105 in the lower gas collection hood 101 is kept within the same range, so that a large, stable and uniform negative pressure can be generated in the gas collection hood 101, maintaining a good suction effect.

[0041] In this embodiment, a filter screen 106 is provided in the gas collection hood 101 below the partition 104. The surface of the filter screen 106 abuts against the lower end of the partition 104, and the two sides of the filter screen 106 are snapped and fixed to the inner wall of the gas collection hood 101. The fixing method can be the connection of bolts or the like. The filter screen 106 is attached to the lower surface of each gas collection area 105. The filter screen 106 is used to separate each gas collection area 105, which makes it easier to generate negative pressure in the gas collection area 105 and improve the adsorption effect. At the same time, the filter screen 106 can also preliminarily filter impurities in the flue gas.

[0042] To balance the stability of the negative pressure in each gas collection zone 105 in the gas collection hood 101, the exhaust pipe 102 includes a number of exhaust sections 1021 connected in sequence. The diameter of the exhaust section 1021 gradually decreases along the first direction, and each exhaust section 1021 is connected by a reducer 1022 to form the entire exhaust pipe 102.

[0043] The exhaust pipe 102 is positioned at a variable diameter location, with the pipe diameter gradually decreasing, so that the exhaust section 1021 of the exhaust pipe 102, which is far away from the suction device 2, is more likely to generate a larger negative pressure, thereby improving the adsorption effect and further balancing the negative pressure adsorption effect in the entire gas collection hood 101.

[0044] In addition, the exhaust pipe 102 is configured to gradually increase in diameter as it approaches the suction device 2, so that more smoke can smoothly pass through the exhaust pipe 102 and enter the suction device 2.

[0045] In this embodiment, the filtration device 3 includes a tank 301 and an air inlet pipe 303.

[0046] The tank 301 stores a filtrate, which can be water or a mixture of water, oil, and other chemical agents to facilitate the formation of a solution that reacts with the flue gas. An outlet 302 is provided on the tank 301 above the surface of the filtrate. One end of the inlet pipe 303 is connected to the output end of the suction device 2, and the other end extends into the bottom of the tank 301, allowing the flue gas to be passed into the filtrate for full absorption and filtration from the bottom up, and then discharged from the outlet 302 of the tank 301.

[0047] Furthermore, the filtration device 3 may also include a gas filtration adsorption tank, which is connected to the gas outlet of the tank body to further filter the gas. The filtration adsorption tank may use a filter medium such as activated carbon for filtration adsorption.

[0048] To improve the filtration effect, an air distribution plate 304 is provided at the other end of the air inlet pipe 303. The bottom of the air distribution plate 304 is provided with several multi-hole nozzles, which spray the flue gas out through the multiple multi-hole nozzles to further improve the contact effect with the filtrate.

[0049] To facilitate the replacement of the filtrate in tank 301, a drain pipe 306 is provided at the bottom of tank 301. The drain pipe 306 is equipped with a discharge valve. When the filtrate needs to be replaced, the discharge valve is opened to drain the filtrate.

[0050] Meanwhile, the top of the tank 301 is also equipped with a liquid inlet 307 for adding filter liquid. When there are a small amount of impurities inside the tank 301, liquid can be introduced through the liquid inlet 307 for rinsing and then discharged from the drain pipe 306.

[0051] To improve the flow guiding effect of the gas collection zone 105, the thickness of the baffle 104 is set to gradually increase from bottom to top, guiding the gas to the connecting pipe 103 and into the exhaust pipe 102.

[0052] To improve the protection of the suction device 2, a filter screen 4 is provided at the input and output ends of the suction device 2. The filter screen 4 is detachably inserted into the input and output ends of the suction device 2, and can be easily replaced when it is dirty.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A flue gas treatment device for a welded pipe unit, characterized in that, include: A collection device is installed above the welded pipe unit. The collection device includes a gas collecting hood and an exhaust pipe connected to the gas collecting hood. The gas collecting hood is provided with several baffles at intervals along the first direction of the welded pipe unit's welding advance to divide the gas collecting hood into several gas collecting areas. Several connecting pipes are provided at intervals on the exhaust pipe. One end of each connecting pipe is connected to the exhaust pipe, and the other end is connected to the gas collecting area. The diameter of the connecting pipes gradually decreases along the first direction. A suction device, the input end of which is connected to the larger diameter end of the exhaust pipe; A filtration device, the input of which is connected to the output of the suction device.

2. The flue gas treatment device according to claim 1, characterized in that, A filter element is provided in the gas collection hood below the partition, and the filter element is used to separate each of the gas collection zones.

3. The flue gas treatment device according to claim 1, characterized in that, The exhaust pipe includes several exhaust sections connected in sequence, and the diameter of the exhaust sections gradually decreases along a first direction.

4. The flue gas treatment device according to claim 1, characterized in that, The filtration device includes: A tank containing filtrate, wherein an air outlet is provided on the tank above the surface of the filtrate; The air inlet pipe has one end connected to the output end of the suction device and the other end extending into the bottom of the tank.

5. The flue gas treatment device according to claim 4, characterized in that, An air distribution plate is provided at the other end of the air intake pipe, and several multi-hole nozzles are provided at the bottom of the air distribution plate.

6. The flue gas treatment device according to claim 5, characterized in that, The tank is equipped with a drain pipe at the bottom, and a drain valve is installed on the drain pipe.

7. The flue gas treatment device according to claim 1, characterized in that, The thickness of the partition is set to gradually increase from bottom to top.

8. The flue gas treatment device according to claim 1, characterized in that, The suction device is equipped with filters at both its input and output ends.

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