Exhaust pipe with dust blocking structure

Abstract

The utility model provides a kind of exhaust pipe with dust blocking structure belongs to exhaust structure technical field, including exhaust pipe body and dust blocking subassembly.Exhaust pipe body is installed in the exhaust end of furnace pot, and the inner cavity of furnace pot is communicated with the air inlet end of exhaust pipe body, and the air outlet end is connected to dust removal equipment, and the inside of exhaust pipe body has exhaust passage;Dust blocking subassembly includes dust blocking cap and dust fall plate, and dust blocking cap is spaced apart and set in the air inlet end of exhaust pipe body near furnace pot side, and dust fall plate is set in the air inlet end outer wall of exhaust pipe body periphery, and the side of dust fall plate towards furnace pot forms first dust fall face, and the side of dust blocking cap away from furnace pot forms second dust fall face.The utility model provides a kind of exhaust pipe with dust blocking structure, reduces impurity by double interception structure, prolongs the life of exhaust pipe, reduces maintenance cost, and improves the stability of equipment operation.

Description

Technical Field

[0001] This utility model belongs to the field of exhaust structure technology, and more specifically, it relates to an exhaust pipe with a dust-blocking structure. Background Technology

[0002] In industrial heat treatment, metallurgical smelting, and chemical reactions, furnaces and tanks serve as core reaction vessels. During high-temperature, high-pressure, or chemical reactions, they generate a large amount of waste gas containing suspended impurities. This waste gas needs to be discharged in a timely manner through exhaust pipes to maintain stable pressure inside the furnace or tank and ensure the normal operation of the production process. At the same time, the outlet of the exhaust pipe is usually connected to dust removal equipment for final purification of the waste gas.

[0003] However, existing exhaust pipes are mostly single tubular structures that only guide the flow of exhaust gas and lack effective pre-dust filtering and purification functions. The exhaust gas generated inside the furnace often contains suspended impurities such as metal oxide particles, unreacted raw material dust, and high-temperature reaction byproducts. These impurities can directly enter the exhaust pipe with the high-speed airflow and impact the inner wall of the exhaust pipe. Long-term use can easily cause wear and blockage of the inner wall of the exhaust pipe, shortening its service life and increasing equipment maintenance costs. Utility Model Content

[0004] The purpose of this utility model is to provide an exhaust pipe with a dust-blocking structure, which aims to solve the problem that the exhaust gas generated in the furnace can directly enter the interior of the exhaust pipe with the high-speed airflow, which easily causes wear and blockage of the inner wall of the exhaust pipe, shortens the service life of the exhaust pipe, and increases the equipment maintenance cost.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide an exhaust pipe with a dust-blocking structure, comprising: The exhaust pipe body is installed at the exhaust end of the furnace tank. The inlet end of the exhaust pipe body is connected to the inner cavity of the furnace tank, and the outlet end is used to connect to the dust removal equipment. The interior of the exhaust pipe body has an exhaust channel for exhausting air from the inlet end to the outlet end. The dust-blocking assembly includes a dust-blocking cap and a dust-suppressing plate. The dust-blocking cap is spaced apart at the air inlet end of the exhaust pipe body near the furnace tank. The dust-suppressing plate is disposed circumferentially on the outer wall of the air inlet end of the exhaust pipe body. The side of the dust-suppressing plate facing the furnace tank forms a first dust-suppressing surface, and the side of the dust-blocking cap facing away from the furnace tank forms a second dust-suppressing surface. Gas inside the furnace tank is deflected back through the first dust-suppressing surface to the second dust-suppressing surface and then discharged through the exhaust channel. The first dust-suppressing surface and the second dust-suppressing surface can block suspended impurities in the gas to purify the gas discharged from the exhaust channel.

[0006] In one possible implementation, the dust cap includes a dust baffle plate and an outer peripheral plate. The dust baffle plate is spaced apart on the side of the exhaust pipe body near the furnace tank at the air inlet end. The outer peripheral plate is disposed circumferentially on the dust baffle plate and extends toward the exhaust pipe body to cover the air inlet end of the exhaust pipe body. The second dust-reducing surface is formed on the inner side of the dust baffle plate.

[0007] In one possible implementation, the dust baffle is parallel to the air inlet end of the exhaust pipe body, and its outer contour is larger than the inner diameter of the air inlet end of the exhaust pipe body.

[0008] In one possible implementation, the outer plate gradually tilts outward from the dust baffle towards the exhaust pipe body.

[0009] In one possible implementation, the dust-collecting plate gradually tilts towards one side of the furnace tank from the inside out.

[0010] In one possible implementation, the inner diameter of one outer end of the dust-collecting plate is larger than the inner diameter of the dust-blocking cap.

[0011] In one possible implementation, a fixing plate is circumferentially provided on the outer wall of the air inlet end of the exhaust pipe body, and a fixing sleeve extending toward the furnace tank is provided on one outer end of the fixing plate. One inner end of the dust-suppressing plate is connected to the inner side of the fixing plate, and one outer end of the dust-suppressing plate is connected to the side of the fixing sleeve near the furnace tank.

[0012] In one possible implementation, a sealing ring is provided on the outer peripheral surface of the fixing sleeve near the furnace tank.

[0013] In one possible implementation, a mounting plate is fixed to the outer peripheral surface of the exhaust pipe body away from the furnace tank, and a clearance groove is provided radially on the outer periphery of the mounting plate.

[0014] In one possible implementation, the mounting plate has two handles symmetrically arranged on the end face away from the furnace.

[0015] The beneficial effects of the exhaust pipe with a dust-blocking structure provided by this utility model are as follows: Compared with the prior art, this solution constructs a reversible airflow path through a synergistic dust-blocking component consisting of a dust cap and a dust-reducing plate. This allows the dust-laden exhaust gas discharged from the furnace to first impact the first dust-reducing surface of the dust-reducing plate, where most large suspended particles are initially filtered due to inertial adhesion. Subsequently, the airflow reverses to the second dust-reducing surface of the dust cap, which faces away from the furnace. The remaining fine impurities are further intercepted during the reversal due to kinetic energy loss. This dual-interception structure significantly reduces the impurity content entering the exhaust channel from the source. The reduction in impurity content directly alleviates the scouring and wear of the exhaust pipe's inner wall by hard impurities in the high-speed airflow, preventing the pipe wall from thinning, perforating, or even prematurely failing due to excessive wear, thus significantly extending the exhaust pipe's service life. Simultaneously, the reduction in the total amount of impurities fundamentally reduces the probability of viscous impurities accumulating and clogging inside the pipe, lowering the risk of exhaust pipe blockage and consequently reducing the frequency of downtime for disassembly and cleaning. The extended service life reduces the cost of purchasing spare parts for exhaust pipe replacement, the reduced maintenance frequency saves labor costs, and avoids production interruption losses caused by frequent maintenance and blockages. It not only saves overall maintenance costs, but also ensures the smooth and stable operation of the exhaust system, and improves the stability and reliability of the entire production equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of an exhaust pipe with a dust-blocking structure provided in an embodiment of this utility model; Figure 2 for Figure 1 A cross-sectional view along AA.

[0018] In the diagram: 1. Exhaust pipe body; 2. Exhaust passage; 3. Dust baffle; 4. Outer plate; 401. Second dust suppression surface; 5. Dust suppression plate; 501. First dust suppression surface; 6. Fixing plate; 7. Fixing sleeve; 8. Sealing ring; 9. Mounting plate; 901. Clearance groove; 902. Handle. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] Unless otherwise explicitly specified, the use of terms such as "first," "second," or "third" is intended to distinguish different objects, not to describe a specific order.

[0021] Unless otherwise expressly defined, the use of directional terms such as “center,” “lateral,” “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “back,” “left,” “right,” “clockwise,” “counterclockwise,” “high,” and “low” to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of the present invention.

[0022] Please see Figure 1 and Figure 2 This invention provides a dust-blocking exhaust pipe. The exhaust pipe includes an exhaust pipe body 1 and a dust-blocking assembly. The exhaust pipe body 1 is installed at the exhaust end of a furnace tank. The inlet end of the exhaust pipe body 1 communicates with the inner cavity of the furnace tank, and the outlet end is used to connect to a dust removal device. The interior of the exhaust pipe body 1 has an exhaust channel 2 for exhausting gas from the inlet end to the outlet end. The dust-blocking assembly includes a dust cap and a dust-collecting plate 5. The dust cap is spaced apart at the inlet end of the exhaust pipe body 1 near the furnace tank. The dust-collecting plate 5 is disposed circumferentially on the outer wall of the inlet end of the exhaust pipe body 1. The side of the dust-collecting plate 5 facing the furnace tank forms a first dust-collecting surface 501, and the side of the dust cap facing away from the furnace tank forms a second dust-collecting surface 401. Gas inside the furnace tank is deflected back through the first dust-collecting surface 501 to the second dust-collecting surface 401 and then discharged through the exhaust channel 2. The first dust-collecting surface 501 and the second dust-collecting surface 401 can block suspended impurities in the gas to purify the gas discharged from the exhaust channel 2.

[0023] This utility model provides an exhaust pipe with a dust-blocking structure. Compared with the prior art, this solution constructs a reversible airflow path through a synergistic dust-blocking assembly consisting of a dust cap and a dust settling plate 5. The dust-laden exhaust gas discharged from the furnace first impacts the first dust settling surface 501 of the dust settling plate 5, where most large suspended particles are initially filtered due to inertial adhesion. The airflow then reverses to the second dust settling surface 401 of the dust cap, which faces away from the furnace. The remaining fine impurities are further intercepted during the reversal due to kinetic energy loss. This dual-interception structure significantly reduces the impurity content entering the exhaust channel 2 from the source. The reduction in impurity content directly alleviates the scouring and wear of the exhaust pipe's inner wall by hard impurities in the high-speed airflow, preventing the pipe wall from thinning, perforating, or even prematurely failing due to excessive wear, thus significantly extending the exhaust pipe's service life. Simultaneously, the reduction in the total amount of impurities fundamentally reduces the probability of viscous impurities accumulating and clogging the pipe, lowering the risk of exhaust pipe blockage and consequently reducing the frequency of downtime for disassembly and cleaning. The extended service life reduces the cost of purchasing spare parts for exhaust pipe replacement, the reduced maintenance frequency saves labor costs, and avoids production interruption losses caused by frequent maintenance and blockages. It not only saves overall maintenance costs, but also ensures the smooth and stable operation of the exhaust system, and improves the stability and reliability of the entire production equipment.

[0024] Please see Figure 2 The dust cap includes a dust baffle plate 3 and an outer peripheral plate 4. The dust baffle plate 3 is spaced apart at the air inlet end of the exhaust pipe body 1 near the furnace tank, and the outer peripheral plate 4 is disposed around the dust baffle plate 3. The two are welded together. The outer peripheral plate 4 extends towards the exhaust pipe body 1 and covers the air inlet end of the exhaust pipe body 1. A second dust-collecting surface 401 is formed on the inner side of the dust baffle plate 3. The covering structure of the outer peripheral plate 4 can regulate the airflow path, prevent uninterrupted airflow from disorderly impacting the inner wall of the exhaust pipe air inlet end, and reduce local high-speed scouring caused by airflow turbulence, thereby reducing the risk of pipe wall wear. In addition, the outer peripheral plate 4 forms a protective barrier over the exhaust pipe air inlet end, which can effectively prevent impurities carried by the external environment or reverse airflow inside the furnace tank from flowing back into the exhaust channel 2, ensuring the cleanliness of the exhaust system.

[0025] Please see Figure 2 The dust baffle 3 is parallel to the air inlet end of the exhaust pipe body 1, forming an equidistant gap between them. This reduces the strong turbulence that occurs when dust-laden exhaust gas passes through this gap. The outer contour of the dust baffle 3 is larger than the inner diameter of the air inlet end of the exhaust pipe body 1, which can fully cover the air inlet opening. Together with the outer plate 4, it more accurately guides the deflected airflow through the inner side of the dust baffle 3, which serves as the second dust-collecting surface 401, preventing airflow from escaping and improving the interception rate of fine impurities. At the same time, it can further prevent large particles of impurities from directly entering the air inlet end, strengthening the dust-blocking effect at the source and reducing the risk of wear and blockage of the exhaust passage 2.

[0026] Please see Figure 2The outer plate 4 gradually tilts outward from the dust baffle 3 towards the exhaust pipe body 1. First, this structure creates an inclined guide surface on the outer side of the outer plate 4, which guides the airflow to diffuse outward simultaneously as it flows towards the exhaust pipe body 1, preventing the accumulation of impurities in the gas. The diffused airflow is then guided back through the first dust-collecting surface 501 to the second dust-collecting surface 401 on the inner side of the dust baffle 3, preventing airflow obstruction and turbulence. Simultaneously, the outward tilting structure expands the area where the airflow contacts the second dust-collecting surface 401, improving the adhesion and interception effect of fine impurities, further reducing impurities entering the exhaust channel 2, and lowering the risk of pipe wall wear and blockage.

[0027] Please see Figure 2 The dust-collecting plate 5 gradually tilts towards the furnace tank from the inside out, which can guide the dust-laden airflow discharged from the furnace tank to impact its first dust-collecting surface 501 more smoothly. The tilt angle increases the contact area and impact force between the airflow and the dust-collecting surface, causing more suspended impurities to be intercepted due to inertia. At the same time, the tilted structure can guide the intercepted impurities to slide down naturally, avoiding accumulation and blockage of the dust-collecting surface, continuously ensuring its dust-blocking effect, and further reducing impurities entering subsequent stages.

[0028] Please see Figure 2 The inner diameter of one outer end of the dust-collecting plate 5 is larger than the inner diameter of the dust cap, which can expand the coverage of the first dust-collecting surface 501, allowing the dust-laden airflow discharged from the furnace to come into full contact with the first dust-collecting surface 501, thereby improving the initial interception efficiency of large particles of impurities. At the same time, the larger inner diameter can provide a smoother return channel for the airflow, avoiding turbulence caused by narrow channels. Together with the dust cap, it achieves more efficient double dust blocking, further reducing impurities entering the exhaust channel 2 and reducing the risk of wear and blockage.

[0029] Please see Figure 2A fixing plate 6 is circumferentially welded to the outer wall of the air inlet end of the exhaust pipe body 1. A fixing sleeve 7 extending towards the furnace is provided at one outer end of the fixing plate 6. One end of the fixing sleeve 7 has a dust-suppressing plate 5 welded to the inner side of the fixing plate 6, and the other end of the dust-suppressing plate 5 is welded to the side of the fixing sleeve 7 near the furnace. The fixing plate 6 is welded to the exhaust pipe body 1 as a whole, and the fixing sleeve 7 is connected to the fixing plate 6. The inner and outer ends of the dust-suppressing plate 5 are then welded to the inner side of the fixing plate 6 and the side of the fixing sleeve 7 near the furnace, forming a stable triangular support fixing structure. This structure can firmly fix the dust-suppressing plate 5, preventing it from shifting, deforming, or even falling off under the impact of high-speed airflow, ensuring that the dust-suppressing plate 5 can stably perform its dust-blocking function for a long time. Secondly, the welding fixing method has high connection strength and good sealing performance, and will not loosen due to airflow scouring or equipment vibration, ensuring the reliability of the connection between the dust-blocking component and the exhaust pipe body 1, thereby improving the overall stability of the entire exhaust pipe dust-blocking structure. In addition, this fixed structure layout is reasonable. While achieving a firm fixation, it does not obstruct the normal return path of the airflow and does not affect the synergistic dust-blocking effect of the first dust-blocking surface 501 and the second dust-blocking surface 401 of the dust cap. It takes into account both structural stability and dust-blocking functionality.

[0030] Please see Figure 2 A sealing ring 8 is provided on the outer circumference of the fixed sleeve 7 near the furnace tank, which can effectively fill the gap at the connection between the fixed sleeve 7 and the furnace tank, forming a reliable sealing barrier. On the one hand, it can prevent unfiltered dust-laden airflow inside the furnace tank from escaping directly through the gap or bypassing the first dust-falling surface 501 of the dust-falling plate 5 and entering the exhaust channel 2, ensuring that the airflow must pass through the preset reflux filtration path, thereby enhancing the overall interception effect of the dust-blocking component. On the other hand, it can prevent dust and debris in the external environment from entering the connection between the fixed sleeve 7 and the exhaust pipe body 1 through the gap, avoiding the accumulation of impurities that affect the stability of the fixed structure, while reducing the erosion of welded joints by impurities and extending the service life of the entire dust-blocking device.

[0031] Please see Figure 1 A mounting plate 9 is fixed to the outer circumferential surface of the exhaust pipe body 1 away from the furnace tank. The mounting plate 9 has a radial clearance groove 901 on its outer circumference. This clearance groove 901 avoids protrusions, bolts, and other components at the connection end of the dust removal equipment, preventing structural interference during installation and ensuring a smooth installation process. Furthermore, during subsequent maintenance and disassembly, the clearance groove 901 provides operating space for tools such as wrenches, facilitating the tightening and loosening of connections and improving the convenience of installation and maintenance.

[0032] Please see Figure 1The mounting plate 9 has two symmetrical handles 902 on the end face furthest from the furnace, improving the ease of installation and maintenance of the exhaust pipe. During installation, operators can use the symmetrical handles 902 to hold the exhaust pipe stably and precisely adjust its docking angle with the dust removal equipment, avoiding positional deviations caused by center of gravity shifts during docking and ensuring a precise fit between the mounting plate 9 and the dust removal equipment connection. During disassembly and maintenance, the handles 902 provide reliable force points for moving the exhaust pipe. Especially for heavier exhaust pipes, the symmetrical layout balances the force, preventing tilting or slippage during single or double-person handling, reducing operational risks. Simultaneously, during routine equipment maintenance, the handles 902 also facilitate fine-tuning of the exhaust pipe's position, improving the overall efficiency of maintenance work.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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. An exhaust pipe with a dust-blocking structure, characterized in that, include: The exhaust pipe body (1) is installed at the exhaust end of the furnace tank. The air inlet end of the exhaust pipe body (1) is connected to the inner cavity of the furnace tank, and the air outlet end is used to connect to the dust removal equipment. The interior of the exhaust pipe body (1) has an exhaust channel (2) for exhausting air from the air inlet end to the air outlet end. The dust-blocking assembly includes a dust cap and a dust-reducing plate (5). The dust cap is spaced apart on the side of the exhaust pipe body (1) near the furnace tank at the air inlet end. The dust-reducing plate (5) is disposed on the circumferential side of the outer wall of the exhaust pipe body (1) at the air inlet end. The side of the dust-reducing plate (5) facing the furnace tank forms a first dust-reducing surface (501), and the side of the dust cap facing away from the furnace tank forms a second dust-reducing surface (401). The gas in the furnace tank is folded back to the second dust-reducing surface (401) through the first dust-reducing surface (501) and then discharged through the exhaust channel (2). The first dust-reducing surface (501) and the second dust-reducing surface (401) can block suspended impurities in the gas to purify the gas discharged from the exhaust channel (2).

2. An exhaust pipe with a dust-blocking structure as described in claim 1, characterized in that, The dust cap includes a dust baffle plate (3) and an outer plate (4). The dust baffle plate (3) is spaced apart on the side of the exhaust pipe body (1) near the furnace tank. The outer plate (4) is arranged around the dust baffle plate (3). The outer plate (4) extends toward the exhaust pipe body (1) and covers the exhaust pipe body (1). The second dust-reducing surface (401) is formed on the inner side of the dust baffle plate (3).

3. An exhaust pipe with a dust-blocking structure as described in claim 2, characterized in that, The dust baffle (3) is parallel to the air inlet end of the exhaust pipe body (1), and its outer contour is larger than the inner diameter of the air inlet end of the exhaust pipe body (1).

4. An exhaust pipe with a dust-blocking structure as described in claim 2, characterized in that, The outer plate (4) gradually tilts outward from the dust baffle (3) toward the exhaust pipe body (1).

5. An exhaust pipe with a dust-blocking structure as described in claim 1, characterized in that, The dust-collecting plate (5) gradually tilts towards the furnace tank from the inside out.

6. An exhaust pipe with a dust-blocking structure as described in claim 5, characterized in that, The inner diameter of one outer end of the dust-reducing plate (5) is larger than the inner diameter of the dust-blocking cap.

7. An exhaust pipe with a dust-blocking structure as described in claim 5, characterized in that, A fixing plate (6) is provided circumferentially on the outer wall of the air inlet end of the exhaust pipe body (1). A fixing sleeve (7) extending towards the furnace tank is provided on one side of the fixing plate (6). One side of the dust-reducing plate (5) is connected to the inner side of the fixing plate (6). One side of the dust-reducing plate (5) is connected to the side of the fixing sleeve (7) near the furnace tank.

8. An exhaust pipe with a dust-blocking structure as described in claim 7, characterized in that, The fixing sleeve (7) is provided with a sealing ring (8) near the outer circumference of the furnace tank.

9. An exhaust pipe with a dust-blocking structure as described in claim 1, characterized in that, The exhaust pipe body (1) is fixed with an installation plate (9) on the outer peripheral surface away from the furnace tank, and the installation plate (9) is provided with a relief groove (901) on the outer peripheral radial surface.

10. An exhaust pipe with a dust-blocking structure as described in claim 9, characterized in that, The mounting plate (9) has two handles (902) symmetrically arranged on the end face away from the furnace.

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