A kind of exhaust purification device for laser pipe cutting machine

Abstract

The application belongs to the technical field of waste gas purification, and discloses a waste gas purification device for a laser pipe cutting machine. The application comprises a filter box, a gas inlet fixedly connected to the left side of the filter box, a filter assembly slidingly arranged in the interior of the filter box and used for preliminarily filtering waste gas entering the interior of the filter box, a separation assembly fixedly arranged in the interior of the filter box and used for intercepting oily substances in the waste gas, and an adsorption assembly fixedly arranged on the right side of the filter box and used for adsorbing residual harmful gases and odors in the waste gas. The preliminary filtering of the filter assembly, the interception of oily substances by the separation assembly and the adsorption of residual harmful gases by the adsorption assembly form a complete purification link, and oily substances in the waste gas are effectively removed in the process of purifying the waste gas, thereby prolonging the service life and improving the purification effect of the purification mechanism.

Description

Technical Field

[0001] This utility model relates to the field of waste gas purification technology, and in particular to a waste gas purification device for a laser tube cutting machine. Background Technology

[0002] As a core piece of equipment in the field of metal pipe processing, laser pipe cutting machines, through the synergy of high-power lasers, precision CNC systems, and professional pipe cutting software, can achieve complex processes such as high-precision cutting, drilling, grooving, and slitting of pipes, significantly improving the automation and intelligence level of pipe processing. They have been widely used in high-end equipment fields such as aerospace, automobile manufacturing, and engineering machinery.

[0003] However, during the processing of metal pipes using high-energy lasers, laser pipe cutting machines generate complex waste gases due to the high-temperature melting and vaporization of the metal and the volatilization of additives. These waste gases mainly contain three categories of pollutants: First, metal dust, such as metal particles from the iron, aluminum, and stainless steel substrates of the pipes. Some of these fine particles (PM2.5 level) are easily suspended in the air, not only adhering to the surface of precision parts of the equipment and affecting processing accuracy, but also potentially entering the human body through respiration and harming health. Second, harmful gases, such as nitrogen oxides and sulfides generated by metal oxidation reactions, and volatile organic compounds (VOCs) produced by the high-temperature decomposition of laser cutting additives (such as oily coolant lubricants). These gases have irritating odors, and long-term emissions will damage the air quality in the workshop and even cause air pollution problems. Third, oily substances, mainly from the coolant lubricating grease used in the cutting process. This substance is mixed into the waste gas in the form of oil mist and has the characteristics of high viscosity and easy adhesion.

[0004] In current industrial practice, existing technologies for purifying exhaust gases from laser tube cutting machines generally have significant limitations. Most purification devices employ a single adsorption treatment mode, such as relying solely on activated carbon adsorption layers to treat exhaust gases. This approach has two major drawbacks: Firstly, it lacks the ability to handle oily substances. Because oily substances cannot be effectively captured by conventional adsorption materials, they adhere to the surface of the adsorption layer with the airflow, forming an oil film. This not only clogs the pores of the adsorption material, causing a rapid decline in adsorption capacity, but also attracts subsequently entering dust particles, forming oil-dust composite pollutants, significantly shortening the replacement cycle of adsorption components and the overall lifespan of the equipment. Secondly, the purification effect on harmful gases and odors is insufficient. A single activated carbon adsorption layer can only adsorb some VOCs. Its adsorption efficiency for inorganic harmful gases such as nitrogen oxides and sulfides, as well as specific odor components, is extremely low. This makes it difficult to meet increasingly stringent industrial waste gas emission standards (such as the "Standard for the Control of Unorganized Emissions of Volatile Organic Compounds" GB 37822-2019 and the "Emission Standard of Air Pollutants for Industrial Furnaces and Kilns" GB 9078-1996). As a result, the purified gas still has residual odors, which cannot guarantee the occupational health of workshop operators and does not meet environmental protection regulatory requirements.

[0005] Furthermore, while some improved purification devices attempt to add simple filtration stages, the design of the filter components and the oily substance separation mechanism lacks synergy: either the filtration accuracy is insufficient, allowing large dust particles to enter and clog subsequent separation mechanisms; or the separation mechanism has poor sealing performance, leading to leakage of oily exhaust gas, or incomplete collection of oily substances, still causing pollution to downstream purification units. These problems collectively result in low purification efficiency, high maintenance costs, and short service life of existing laser tube cutting machine exhaust gas purification devices, making it difficult to meet the industrial production's demand for efficient, stable, and environmentally friendly exhaust gas treatment. Therefore, developing an integrated exhaust gas purification device that can achieve synergistic effects of dust filtration, oily substance separation, and harmful gas adsorption has become the key to solving the current technical pain points. Utility Model Content

[0006] To address the aforementioned problems, this utility model provides an exhaust gas purification device for laser tube cutting machines.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a waste gas purification device for a laser tube cutting machine, comprising: A filter box, wherein an air inlet is fixedly connected to the left side of the filter box; The filter assembly is slidably installed inside the filter box to perform preliminary filtration of the exhaust gas entering the filter box. The separation component is fixedly installed inside the filter box to intercept oily substances in the exhaust gas; The adsorption component is fixedly installed on the right side of the filter box and is used to adsorb residual harmful gases and odors in the exhaust gas.

[0008] By adopting the above technical solution, a complete purification chain is formed through preliminary filtration, oily substance interception, and residual harmful gas adsorption, avoiding the limitations of a single purification link and ensuring that the purified gas meets the requirements.

[0009] Furthermore, the filtering component includes: The filter cotton layer has three slots on the left side inside the filter box, and the three filter cotton layers are respectively slidably disposed inside the three slots. The sealing plate has a first mounting groove on the upper surface of the filter box. The sealing plate is slidably disposed inside the first mounting groove. Four first threaded holes are provided between the sealing plate and the first mounting groove. The inner surfaces of the four first threaded holes are threaded with first bolts.

[0010] By adopting the above technical solution, and by sequentially arranging three filter cotton layers along the direction of exhaust gas flow, the dust removal rate is greatly improved, large dust particles are prevented from entering the subsequent separation components, and the service life of the separation components is extended.

[0011] Furthermore, a first sealing groove is provided between the sealing plate and the first mounting groove, and a first sealing gasket is slidably connected to the inner surface of the first sealing groove.

[0012] By adopting the above technical solution, leakage of exhaust gas during the filtration process can be prevented.

[0013] Furthermore, the separation component includes: The oil-gas separation plate is fixedly installed inside the filter box. Ventilation grooves are opened on both the front and rear sides of the three oil-gas separation plates on the inner surface of the filter box, and flow guide grooves are opened on the left side of the three oil-gas separation plates on the inner bottom surface of the filter box. The collection box has three second mounting slots on its lower surface. Three collection boxes are provided, and the three collection boxes are slidably disposed inside the three second mounting slots. Four second threaded holes are provided between the collection box and the second mounting slots, and the inner surfaces of the four second threaded holes are threaded with second bolts.

[0014] By adopting the above technical solution, the three inclined oil-gas separation plates form a multi-stage interception. At the same time, the inclined setting of the oil-gas separation plates can ensure that the oil mist particles can effectively collide and adhere, and allow the oil droplets to quickly flow through the guide channel into the collection box for collection. Ventilation slots are opened on the front and rear sides of the oil-gas separation plates to prevent the separation plates from completely blocking the internal space of the filter box, and to ensure that the exhaust gas continues to flow to the right after contacting the oil-gas separation plates.

[0015] Furthermore, a second sealing groove is provided between the collection box and the second mounting groove, and a second sealing gasket is slidably connected to the inner surface of the second sealing groove.

[0016] By adopting the above technical solution, leakage of waste gas during the oil-gas separation process can be prevented.

[0017] Furthermore, two guide plates are fixedly connected to the inner surface of the filter box on the left side of each of the three oil-gas separation plates.

[0018] By adopting the above technical solution, the exhaust gas is guided to flow in a concentrated manner to the effective area of ​​the oil-gas separator, thus avoiding the airflow from flowing out directly through the ventilation slot.

[0019] Furthermore, the adsorption component includes: An adsorption box is provided, wherein a connecting pipe is fixedly connected between the outer surface of the adsorption box and the filter box, and an air outlet pipe is fixedly connected to the upper surface of the adsorption box. An activated carbon adsorption layer is fixedly installed inside the adsorption box, and a molecular sieve adsorption layer is fixedly installed on the inner surface of the adsorption box above the activated carbon adsorption layer.

[0020] By adopting the above technical solution, which combines an activated carbon adsorption layer and a molecular sieve adsorption layer, the activated carbon adsorption layer can effectively adsorb residual harmful gases and odors in the waste gas, while the molecular sieve adsorption layer can further adsorb moisture and some harmful gases in the waste gas, thereby improving the adsorption effect.

[0021] Furthermore, the lower surfaces of both the filter box and the adsorption box are fixedly connected with four support legs.

[0022] The above technical solution is used to support the filter box and the adsorption box.

[0023] In summary, this utility model has the following beneficial effects: A complete purification chain is formed by the initial filtration of the filter components, the interception of oily substances by the separation components, and the adsorption of residual harmful gases in the adsorption components. In the process of purifying waste gas, oily substances in the waste gas are effectively removed, thereby improving the service life and purification effect of the purification unit. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a front sectional view of an embodiment of the present invention; Figure 3 This is a top cross-sectional view of an embodiment of the present utility model; Figure 4This is a schematic diagram of the structure of the sealing plate in an embodiment of this utility model; Figure 5 This is a side sectional view of an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the collection box used to highlight an embodiment of this utility model.

[0025] In the diagram: 1. Filter box; 11. Air inlet; 2. Slot; 21. Filter cotton layer; 22. First mounting slot; 23. Sealing plate; 24. First threaded hole; 25. First bolt; 26. First sealing groove; 27. First sealing gasket; 3. Oil-gas separator plate; 31. Ventilation groove; 32. Guide groove; 33. Second mounting groove; 34. Collection box; 35. Second threaded hole; 36. Second bolt; 37. Second sealing groove; 38. Second sealing gasket; 39. Guide plate; 4. Adsorption box; 41. Connecting pipe; 42. Air outlet pipe; 43. Activated carbon adsorption layer; 44. Molecular sieve adsorption layer; 45. Support leg. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] like Figure 1-6 As shown in the figure, this application discloses an exhaust gas purification device for a laser tube cutting machine, comprising: Filter box 1, with an air inlet 11 fixedly connected to the left side of filter box 1; The filter assembly is slidably disposed inside the filter box 1 and is used to perform preliminary filtration of the exhaust gas entering the filter box 1. The separation component is fixedly installed inside the filter box 1 to intercept oily substances in the exhaust gas; The adsorption component is fixedly installed on the right side of the filter box 1 and is used to adsorb residual harmful gases and odors in the exhaust gas.

[0028] By adopting the above technical solution, a complete purification chain is formed through preliminary filtration, oily substance interception, and residual harmful gas adsorption, avoiding the limitations of a single purification link and ensuring that the purified gas meets the requirements.

[0029] Furthermore, the filtering components include: The filter cotton layer 21 has three slots 2 on the left side inside the filter box 1. There are three filter cotton layers 21, and the three filter cotton layers 21 are slidably arranged inside the three slots 2 respectively. The sealing plate 23 and the filter box 1 have a first mounting groove 22 on their upper surface. The sealing plate 23 is slidably disposed inside the first mounting groove 22. Four first threaded holes 24 are provided between the sealing plate 23 and the first mounting groove 22. The inner surfaces of the four first threaded holes 24 are threaded with first bolts 25.

[0030] By adopting the above technical solution, and by sequentially arranging three filter cotton layers 21 along the direction of exhaust gas flow, the dust removal rate is greatly improved, large dust particles are prevented from entering the subsequent separation components, and the service life of the separation components is extended.

[0031] Furthermore, a first sealing groove 26 is provided between the sealing plate 23 and the first mounting groove 22, and a first sealing gasket 27 is slidably connected to the inner surface of the first sealing groove 26.

[0032] By adopting the above technical solution, leakage of exhaust gas during the filtration process can be prevented.

[0033] Furthermore, the separate components include: Oil-gas separation plate 3, three oil-gas separation plates 3 are fixedly installed inside the filter box 1. Ventilation grooves 31 are opened on the front and rear sides of the three oil-gas separation plates 3 on the inner surface of the filter box 1. Guide grooves 32 are opened on the left side of the three oil-gas separation plates 3 on the inner bottom surface of the filter box 1. The lower surface of the collection box 34 and the filter box 1 has three second mounting slots 33. There are three collection boxes 34, which are slidably disposed inside the three second mounting slots 33 respectively. There are four second threaded holes 35 between the collection box 34 and the second mounting slots 33. The inner surface of the four second threaded holes 35 is threaded with second bolts 36.

[0034] By adopting the above technical solution, the three inclined oil-gas separation plates 3 form a multi-stage interception. At the same time, the inclined setting of the oil-gas separation plates 3 can ensure that the oil mist particles can effectively collide and adhere, and allow the oil droplets to quickly flow through the guide channel 32 into the collection box 34 for collection. Ventilation channels are opened on the front and rear sides of the oil-gas separation plates to avoid the separation plates completely blocking the internal space of the filter box, and to ensure that the exhaust gas continues to flow to the right after contacting the oil-gas separation plates 3.

[0035] Furthermore, a second sealing groove 37 is provided between the collection box 34 and the second mounting groove 33, and a second sealing gasket 38 is slidably connected to the inner surface of the second sealing groove 37.

[0036] By adopting the above technical solution, leakage of waste gas during the oil-gas separation process can be prevented.

[0037] Furthermore, two guide plates 39 are fixedly connected to the inner surface of the filter box 1 on the left side of each of the three oil-gas separation plates 3.

[0038] By adopting the above technical solution, the exhaust gas is guided to flow to the effective area of ​​the oil-gas separator plate 3, avoiding the airflow from flowing out directly through the ventilation groove 31.

[0039] Furthermore, the adsorption component includes: The adsorption box 4 is fixedly connected to the outer surface of the filter box 1 by a connecting pipe 41, and the upper surface of the adsorption box 4 is fixedly connected to an air outlet pipe 42. An activated carbon adsorption layer 43 is fixedly installed inside the adsorption box 4, and a molecular sieve adsorption layer 44 is fixedly installed on the inner surface of the adsorption box 4 above the activated carbon adsorption layer 43.

[0040] By adopting the above technical solution, the activated carbon adsorption layer 43 and the molecular sieve adsorption layer 44 are combined. The activated carbon adsorption layer 43 can effectively adsorb residual harmful gases and odors in the waste gas, and the molecular sieve adsorption layer 44 can further adsorb moisture and some harmful gases in the waste gas, thereby improving the adsorption effect.

[0041] Furthermore, four support legs 45 are fixedly connected to the lower surfaces of both the filter box 1 and the adsorption box 4.

[0042] The above technical solution is used to support the filter box 1 and the adsorption box 4.

[0043] The working principle of the exhaust gas purification device for a laser tube cutting machine in this embodiment is as follows: After the exhaust gas enters the interior of the filter box 1 through the air inlet 11, it first contacts the filter cotton layer 21. The three filter cotton layers 21 can effectively remove large particulate impurities in the exhaust gas, achieving preliminary filtration. Subsequently, the exhaust gas passes through the three filter cotton layers 21 and, under the guidance of the guide plate 39, contacts the oil-gas separation plate 3, forcing the oil mist particles in the exhaust gas to undergo inertial collision. Gravity assists in the discharge of the oil mist. After the attached oil mist particles form oil droplets, they can naturally slide down the inclined surface into the interior of the guide groove 32 and be collected into the interior of the collection box 34 through the inclined setting of the guide groove 32. Then, the exhaust gas passes through multiple channels... The gas trough 31 continues to move to the right, allowing the exhaust gas to enter the interior of the adsorption box 4 through the connecting pipe 41. Then, it contacts the activated carbon adsorption layer 43 and the molecular sieve adsorption layer 44 in sequence, thereby adsorbing the residual harmful gases, odors and moisture in the exhaust gas. The purified exhaust gas can then be discharged through the outlet pipe 42. When the filter cotton layer 21 needs to be replaced, the four first bolts 25 are turned out from the inside of the first threaded hole 24, and then the sealing plate 23 and the filter cotton layer 21 can be slid out upwards for replacement. The four second bolts 36 are turned out from the inside of the four second threaded holes 35, and then the collection box 34 can be slid out downwards for easy cleaning.

[0044] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A waste gas purification device for a laser tube cutting machine, characterized in that it comprises: A filter box (1) is fixedly connected to an air inlet (11) on its left side. The filter assembly is slidably disposed inside the filter box (1) for preliminary filtration of the exhaust gas entering the filter box (1); The separation component is fixedly installed inside the filter box (1) to intercept oily substances in the exhaust gas; The adsorption component is fixedly installed on the right side of the filter box (1) and is used to adsorb residual harmful gases and odors in the exhaust gas. The filtering component includes: The filter cotton layer (21) has three slots (2) on the left side inside the filter box (1). The filter cotton layer (21) has three slots (2) and the three filter cotton layers (21) slide inside the three slots (2) respectively. The sealing plate (23) has a first mounting groove (22) on the upper surface of the filter box (1). The sealing plate (23) is slidably disposed inside the first mounting groove (22). Four first threaded holes (24) are provided between the sealing plate (23) and the first mounting groove (22). The inner surfaces of the four first threaded holes (24) are threaded with first bolts (25). The separation component includes: Oil-gas separation plate (3), three of which are fixedly installed inside the filter box (1), and ventilation grooves (31) are opened on the inner surface of the filter box (1) on both the front and back sides of the three oil-gas separation plates (3), and guide grooves (32) are opened on the bottom surface of the filter box (1) on the left side of the three oil-gas separation plates (3). The collection box (34) has three second mounting slots (33) on the lower surface of the filter box (1). There are three collection boxes (34), which are slidably disposed inside the three second mounting slots (33). There are four second threaded holes (35) between the collection box (34) and the second mounting slots (33). The inner surfaces of the four second threaded holes (35) are threaded with second bolts (36).

2. The exhaust gas purification device for a laser tube cutting machine according to claim 1, characterized in that: A first sealing groove (26) is provided between the sealing plate (23) and the first mounting groove (22), and a first sealing gasket (27) is slidably connected to the inner surface of the first sealing groove (26).

3. The exhaust gas purification device for a laser tube cutting machine according to claim 1, characterized in that: A second sealing groove (37) is provided between the collection box (34) and the second mounting groove (33), and a second sealing gasket (38) is slidably connected to the inner surface of the second sealing groove (37).

4. The exhaust gas purification device for a laser tube cutting machine according to claim 1, characterized in that: The inner surface of the filter box (1) is fixedly connected to two guide plates (39) on the left side of the three oil-gas separation plates (3).

5. The exhaust gas purification device for a laser tube cutting machine according to claim 1, characterized in that: The adsorption component includes: An adsorption box (4) is fixedly connected to the outer surface of the adsorption box (4) and the filter box (1), and an air outlet pipe (42) is fixedly connected to the upper surface of the adsorption box (4). An activated carbon adsorption layer (43) is fixedly installed inside the adsorption box (4), and a molecular sieve adsorption layer (44) is fixedly installed on the inner surface of the adsorption box (4) above the activated carbon adsorption layer (43).

6. The exhaust gas purification device for a laser tube cutting machine according to claim 5, characterized in that: The lower surfaces of both the filter box (1) and the adsorption box (4) are fixedly connected with four support legs (45).

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