Fire retardant device for smoke exhaust system and arc welding workstation

Abstract

The utility model provides a fire retardant device and arc welding workstation for smoke evacuation system, the fire retardant device for smoke evacuation system comprises a smoke collecting hood group, a fire damper and a fire retardant component, the smoke collecting hood group comprises a hood body, an inlet end and a pipeline body, the inlet end is communicated with the pipeline body, the hood body extends outwards from the outer periphery of the inlet end, the fire damper is arranged at the bottom of the hood body, and the fire retardant component is arranged on the pipeline body. The fireproof plate covers an inlet of the inlet end, and the fireproof assembly is arranged on the pipeline body. The fire-retardant assembly comprises a fireproof filter box and a spark blocking box which are sequentially arranged along the pipeline body, flame-retardant filter cotton is arranged in the fireproof filter box, and a filter screen piece is arranged in the spark blocking box. The fire retardant device for the smoke exhaust system can effectively control fire, the smoke flow can be controlled through the fire damper, and sparks are smashed and extinguished; and a fireproof filter box and a spark blocking box of the fire arresting assembly can achieve the effects of adsorbing smoke twice and smashing and extinguishing sparks, smoke gathering and fire breakout in a pipeline are avoided, and the construction safety of arc welding operation is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of welding equipment, and in particular to a fire arrester device for a smoke exhaust system and an arc welding workstation. Background Art

[0002] An arc welding workstation is a device specifically designed for automatic or semi-automatic welding operations. It combines multiple components, including a robotic arm, control system, sensors, and welding tools, to achieve high-precision, efficient, and repeatable welding operations. This type of workstation is widely used in industries such as automotive manufacturing, aerospace, shipbuilding, and heavy machinery manufacturing, as well as in the repair and fabrication of various metal components. The fume exhaust system of an arc welding workstation consists of a fume hood, fume ducting, fume purification device, and atmospheric exhaust outlet, arranged in the order in which the welding fumes are directed. A flame shield is installed in front of the fume hood intake.

[0003] During operation, arc welding sparks are dense and high in temperature. Airflow can cause them to bypass the flame damper and enter the exhaust duct, igniting the smoke and dust accumulated within the duct. Simultaneously, the airflow fuels the combustion of all accumulated smoke and dust within the duct, causing the fire to spread rapidly within the exhaust system. Because exhaust ducts are often made of rolled, metal fish-scale iron pipes and are located above the workshop, extinguishing fires is difficult. If left unchecked for a long time, the pipes can burn and leak, and the flames can even spread to other areas, causing greater damage.

[0004] Therefore, it is necessary to design a fire arrester for a smoke exhaust system to solve the above problems. Utility Model Content

[0005] In view of this, in order to overcome the defects of the existing technology, the utility model provides a fire-blocking device for a smoke exhaust system and an arc welding workstation, which effectively solves the problem that the existing smoke exhaust system cannot prevent sparks from entering the smoke exhaust pipe, and thus cannot prevent sparks from igniting smoke and causing fire.

[0006] According to the first aspect of the present invention, a fire arrester for a smoke exhaust system is provided, wherein the fire arrester for a smoke exhaust system includes a smoke hood group, a fire baffle and a fire arrester assembly, the smoke hood group includes a hood body, an inlet end and a pipe body, the inlet end is connected to the pipe body, the hood body extends outward from the outer periphery of the inlet end, the fire baffle is arranged at the bottom of the hood body, the fire baffle covers the inlet of the inlet end, and the fire arrester assembly is arranged on the pipe body; the fire arrester assembly includes a fireproof filter box and a spark arrester box arranged in sequence along the pipe body, the interior of the fireproof filter box is provided with flame-retardant filter cotton, and the interior of the spark arrester box is provided with a filter mesh member.

[0007] Preferably, a gap is formed between the fire baffle and the inlet of the inlet end; the fire baffle is formed as a disc-shaped component, the inlet of the inlet end is circular, and the diameter of the fire baffle is twice the diameter of the inlet of the inlet end.

[0008] Preferably, the distance between the outer periphery of the fire baffle and the cover body is one quarter of the diameter of the fire baffle.

[0009] Preferably, the fireproof filter box includes a first box body, a filter cotton roller and the flame-retardant filter cotton. The interior of the first box body is hollow, and the two ends of the first box body are respectively connected to the inlet end and the pipe body, and the two side faces of the first box body facing each other are provided with through holes for the flame-retardant filter cotton to pass through; the filter cotton roller is arranged on the outer side wall of the first box body, and the flame-retardant filter cotton is formed into a drum structure, and the drum structure is mounted on the filter cotton roller.

[0010] Preferably, the first box body further includes a maintenance port and a maintenance door, and the maintenance door is pivotally disposed on the maintenance port.

[0011] Preferably, the fireproof filter box includes a first box body and flame-retardant filter cotton, the interior of the first box body is hollow, the two ends of the first box body are respectively connected to the inlet end and the pipeline body, and the flame-retardant filter cotton is arranged in the middle of the first box body.

[0012] Preferably, the spark arrester box further comprises a second box body, the filter element is a pull-out filter, the second box body is arranged on the pipe body, and the pull-out filter is slidably arranged on the second box body.

[0013] Preferably, a replacement port is provided on the first side surface of the second box body, the size of the replacement port corresponds to the thickness of the extractable filter screen, and a pulling handle is provided on one end of the extractable filter screen away from the replacement port.

[0014] Preferably, the spark arrester box further includes a second box body, the second box body is arranged on the pipe body, and the filter element is arranged inside the second box body.

[0015] According to a second aspect of the present invention, an arc welding workstation is provided, wherein the arc welding workstation includes the above-mentioned flame arrester for the smoke exhaust system.

[0016] According to the fire arrester device for a smoke exhaust system of the present invention, the cooperation of the smoke hood group, the fire baffle and the fire arrester assembly can play the role of breaking up and extinguishing sparks, and can also play the role of absorbing smoke dust, thereby preventing smoke dust from accumulating and causing a fire that cannot be extinguished. The fire baffle of the fire arrester device for a smoke exhaust system can first control the smoke flow rate and break up and extinguish sparks, thereby reducing the amount of sparks that enter the inlet end. Furthermore, the fireproof filter box and the spark blocking box of the fire arrester assembly can be sequentially arranged in the pipe body of the smoke hood group, thereby achieving the dual functions of absorbing smoke dust and breaking up and extinguishing sparks twice, thereby preventing smoke dust from accumulating in the pipe and preventing sparks from entering the pipe and causing a fire, thereby ensuring the construction safety of the arc welding operation.

[0017] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic structural diagram of a fire arrester for a smoke exhaust system according to an embodiment of the present utility model is shown;

[0020] Figure 2 A schematic diagram showing the structure of a fire arrester for a smoke exhaust system according to an embodiment of the present invention from a top view;

[0021] Figure 3 A cross-sectional view showing a fire arrester for a smoke exhaust system according to an embodiment of the present invention;

[0022] Figure 4 A schematic structural diagram showing a state in which the fire baffle and the inlet end are separated according to an embodiment of the present utility model;

[0023] Figure 5 A partial exploded view of a fire arrester for a smoke exhaust system according to an embodiment of the present invention is shown.

[0024] Figure markings: 101-hood; 102-inlet end; 103-pipe body; 2-fire baffle; 201-connecting piece; 3-fireproof filter box; 301-first box body; 302-filter cotton roller; 303-flame retardant filter cotton; 304-maintenance port; 305-maintenance door; 4-spark arrester box; 401-second box body; 402-pull-out filter screen; 403-pull handle; 404-replacement port. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0026] In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal" and "vertical" do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", not that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the embodiments of the present application, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0029] According to a first aspect of the present invention, a fire arrester for a smoke exhaust system is provided. Figures 1 to 5 As shown, the smoke exhaust system fire arrester is used for the smoke exhaust system of the arc welding process, especially for the front end of the smoke exhaust system. The smoke exhaust system fire arrester includes a smoke hood group, a fire baffle 2 and a fire arrester component.

[0030] In the following description, reference will be made to Figures 1 to 5 The detailed structures of the smoke hood group, the fire baffle 2 and the fire arresting assembly of the fire arresting device for the smoke exhaust system are described in detail.

[0031] like Figure 1 and Figure 2 As shown, in the embodiment, the smoke hood assembly includes a hood body 101, an inlet end 102, and a duct body 103. Specifically, the inlet end 102 is connected to the duct body 103, and the smoke flow directions of the hood body 101, the inlet end 102, and the duct body 103 are arranged in sequence. The smoke is initially collected by the hood body 101, enters the interior of the duct body 103 from the inlet end 102, and is finally discharged.

[0032] Furthermore, the cover body 101 can be formed into a rectangular structure from a top view, and the rectangular structure extends outward from the outer periphery of the inlet end 102. However, the cover body 101 is not limited thereto and can also be formed into a circular, parallelogram, or trapezoidal structure to meet the needs of use. These shapes are all formed by extending outward from the outer periphery of the inlet end 102.

[0033] Furthermore, a fire baffle 2 is provided at the bottom of the cover body 101, and the fire baffle 2 covers the inlet of the inlet end 102. Since the inlet end 102 is formed into a cylindrical structure, the inlet of the inlet end 102 is formed into a circular shape. In order to match the inlet of the inlet end 102, the fire baffle 2 is formed into a disc-shaped structure. It should also be noted that the purpose of the cover here is to control the flow of smoke. At the same time, since some sparks (the sparks here refer to sparks and fire points generated during arc welding operations, etc., which are collectively referred to as sparks here for the sake of ease of description) will hit the fire baffle 2, the fire baffle 2 can break and extinguish the sparks splashed to its bottom, and thus can also play a role in flame retardancy and fire prevention.

[0034] Furthermore, a fire-blocking assembly is provided in the pipe body 103. The fire-blocking assembly may include a fire-proof filter box 3 and a spark arrester box 4 sequentially arranged along the pipe body 103. The interior of the fire-proof filter box 3 is provided with a flame-retardant filter cotton 303. The flame-retardant filter cotton 303 can absorb smoke ash and extinguish sparks. The interior of the spark arrester box 4 is provided with a filter element. The filter element may be made of a metal material. Since the fire-proof filter box 3 and the spark arrester box 4 are sequentially arranged along the pipe body 103, the smoke first contacts the fire-proof filter box 3 and then contacts the spark arrester box 4. The filter element of the spark arrester box 4 can block the sparks that pass through the flame-retardant filter cotton 303 from entering the rear end of the pipe body 103, and can play a role in secondary extinguishing of sparks. In addition, the filter element can also play a role in secondary adsorption of smoke dust.

[0035] The smoke exhaust system fire arrester device can play the role of breaking up and extinguishing sparks through the cooperation of the smoke hood group, the fire baffle 2 and the fire arrester assembly. At the same time, it can also absorb smoke and dust to prevent smoke and dust from accumulating and causing fires that cannot be extinguished. The fire baffle 2 of the smoke exhaust system fire arrester device can first control the smoke flow rate and break up and extinguish sparks, reducing the amount of sparks entering the inlet end 102. Secondly, the fireproof filter box 3 and the spark blocking box 4 of the fire arrester assembly can be sequentially arranged in the pipe body 103 of the smoke hood group, which can achieve the dual role of absorbing smoke and secondary breaking up and extinguishing sparks, can avoid smoke and dust accumulation in the pipe, and can also prevent sparks from entering the pipe and causing fire, thereby ensuring the construction safety of arc welding operations.

[0036] Preferably, if Figure 3 and Figure 4 As shown, in the embodiment, in order to effectively control the flow of smoke, a gap is formed between the fire baffle 2 and the inlet of the inlet end 102. This arrangement can form a route obstacle when the smoke enters the inlet end 102 again, making the smoke flow in an "S" shape. Therefore, sparks that enter the inlet end 102 along with the smoke also need to move along this route. This causes some sparks to be affected by inertia and other factors, directly hitting the fire baffle 2 and then being broken and extinguished. In addition, during arc welding operations, sputtered sparks can only enter the inlet end 102 along the "S"-shaped route, which can extend the time it takes for the sparks to travel along the route, thereby reducing the sputtering speed and increasing the cooling time of the sparks. Even if some sparks escape into the interior of the inlet end 102, the ignition energy of these sparks will be greatly reduced, thereby avoiding the possibility of fire.

[0037] Preferably, if Figure 3 and Figure 4 As shown, in this embodiment, the fire deflector 2 is formed as a disc-shaped member, and the inlet of the inlet end 102 is circular. To ensure that the disc-shaped fire deflector 2 completely covers the inlet of the circular inlet end 102, the diameter of the fire deflector 2 is twice the diameter of the inlet of the inlet end 102. This configuration further increases the length of the path for smoke and sparks, thereby reducing the splashing speed and increasing the cooling time of sparks. It also ensures that most sparks directly impact the fire deflector 2.

[0038] Preferably, if Figure 2 and Figure 3As shown, in this embodiment, the distance between the outer edge of the fire baffle 2 and the housing 101 is one-quarter the diameter of the fire baffle 2. The housing 101 is not a horizontal component; its outer edge is bent away from the inlet end 102 to allow it to function more effectively as a suction shield. Therefore, during assembly, the distance between the horizontal fire baffle 2 and the housing 101 is not unique. To ensure sufficient smoke flow upon entering the inlet end 102, the minimum distance between the fire baffle 2 and the housing 101 (the minimum distance being the distance between the outer edge of the fire baffle 2 and the housing 101) is one-quarter the diameter of the fire baffle 2. Furthermore, the smoke flow rate varies with the installation distance. A greater installation distance increases the smoke flow rate, but conversely, the smoke flow path is shortened. Users can also select an appropriate installation distance based on their actual needs.

[0039] Preferably, if Figure 2 and Figure 3 As shown, in the embodiment, the fire baffle 2 is fixedly connected to the cover body 101 via a connector 201. The connector 201 can be formed as a Z-shaped component, with both ends of the Z-shaped component fixedly connected to the fire baffle 2 and the cover body 101, respectively, and the fixed connection method can be, for example, a threaded connection.

[0040] Preferably, if Figures 1 to 3 and Figure 5 As shown, in an embodiment, the flame retardant filter cotton 303 can be formed into a detachable connection structure with the pipe body 103. Specifically, the fireproof filter box 3 includes a first box body 301, a filter cotton roller 302 and a flame retardant filter cotton 303. The two ends of the first box body 301 are respectively connected to the inlet end 102 and the pipe body 103. The interior of the first box body 301 is hollow for the passage of smoke. The two side surfaces of the first box body 301 facing each other are provided with through holes for the flame retardant filter cotton 303 to pass through. The filter cotton roller 302 is arranged on the outer wall of the first box body 301, and the flame retardant filter cotton 303 is formed into a reel structure, and the reel structure is mounted on the filter cotton roller 302. The flame-retardant filter cotton 303 can be wound into a roll, and a through hole is provided at the center thereof. The wound flame-retardant filter cotton 303 can be placed on the filter cotton roller 302 through this through hole. The protruding end of the flame-retardant filter cotton 303 can pass through the two through holes of the first box body 301. In this way, the flame-retardant filter cotton 303 can pass through the interior of the first box body 301, and the user can freely pull the flame-retardant filter cotton 303, thereby continuously updating the flame-retardant filter cotton 303 that absorbs smoke and dust in the fireproof filter box 3, ensuring smooth smoke exhaust. The first box body 301 can be connected to the inlet end 102 and the pipe body 103 by welding.

[0041] Preferably, if Figure 5As shown, in this embodiment, the first housing 301 further includes a maintenance opening 304 and a maintenance door 305. The maintenance door 305 is pivotally mounted on the maintenance opening 304. The maintenance door 305 can be understood as a side surface of the first housing 301 and is pivotally connected to the first housing 301 via a pivot axis. Through the maintenance opening 304, the user can directly inspect the first housing 301 and promptly remove smoke and dust. It should also be noted that to ensure a tight seal, sealing strips may be installed at the connection and abutment between the maintenance opening 304 and the maintenance door 305.

[0042] Preferably, in an embodiment, the flame retardant filter cotton 303 can be formed into a fixed structure with the pipe body 103. Specifically, the fireproof filter box 3 can include a first box body 301 and a flame retardant filter cotton 303, the interior of the first box body 301 is hollow, the two ends of the first box body 301 are respectively connected to the inlet end 102 and the pipe body 103, and the flame retardant filter cotton 303 is arranged in the middle of the first box body 301. When the fireproof filter box 3 is produced, the flame retardant filter cotton 303 can be directly loaded into its interior by pressing or compacting. The flame retardant filter cotton 303 can also be loaded into the interior of the inlet end 102 and the pipe body 103, and then the first box body 301 is welded to the inlet end 102 and the pipe body 103.

[0043] Preferably, if Figures 1 to 3 and Figure 5 As shown, in this embodiment, the filter element can be detachably connected to the pipe body 103. Specifically, the spark arrester box 4 also includes a second box body 401, and the filter element is a sheet filter 402. The second box body 401 is disposed in the pipe body 103, and the sheet filter 402 is slidably disposed in the second box body 401. The sheet filter 402 can be formed into a sheet structure supported by a metal material, and the interior of the sheet structure can be formed into a screen or mesh.

[0044] Preferably, if Figures 1 to 3 and Figure 5 As shown, in this embodiment, a replacement port 404 is provided on the first side of the second housing 401. The size of the replacement port 404 corresponds to the thickness of the extractable filter 402. A pull handle 403 is provided on the end of the extractable filter 402 away from the replacement port 404. This allows the user to pull the extractable filter 402 out of the second housing 401 by pulling the handle 403 and clean or replace the extractable filter 402 to ensure smooth smoke exhaust.

[0045] Preferably, in this embodiment, the filter element can be fixed to the pipe body 103. The spark arrester 4 also includes a second housing 401, which is mounted on the pipe body 103 and contains a filter element. The filter element can be directly installed into the second housing 401 by press-fitting or pressing, and then welded to the inlet end 102 and the pipe body 103.

[0046] In addition, in order to facilitate replacement and use by the user, the first box body 301 and the second box body 401 can both be formed into a rectangular parallelepiped structure to distinguish them from the pipe body 103 formed into a cylindrical structure.

[0047] The method of using the fire arrester for the smoke exhaust system is as follows: the arc welding process generates high temperature due to arc discharge, and the generated smoke and sparks are process characteristics and cannot be avoided. Therefore, before the smoke and sparks enter the smoke exhaust system, in order to avoid fire, the fire baffle 2 will first break up and extinguish some sparks; secondly, inside the pipe body 103, the flame retardant filter cotton 303 of the fireproof filter box 3 filters the combustible smoke and reduces the accumulation of combustible smoke in the pipe. At the same time, the sparks are captured before they enter the welding smoke exhaust system with the smoke, and the sparks are extinguished, which can also avoid burning the filter element of the spark arrester box 4; finally, the filter element of the spark arrester box 4 can block the escaping sparks and achieve the purpose of effective fire control.

[0048] The smoke exhaust system fire arrester, through the cooperation of the smoke hood group, the fire baffle and the fire arrester assembly, can play the role of breaking up and extinguishing sparks, and can also absorb smoke and dust to prevent smoke and dust from accumulating and causing fires that cannot be extinguished. The fire baffle of the smoke exhaust system fire arrester can first control the smoke flow and break up and extinguish sparks, reducing the amount of sparks entering the inlet end. Secondly, the fireproof filter box and the spark arrester box of the fire arrester assembly can be sequentially installed in the pipe body of the smoke hood group, which can achieve the dual functions of absorbing smoke and dust and breaking up and extinguishing sparks twice, avoiding smoke and dust accumulation in the pipe, and preventing sparks from entering the pipe and causing fire, thereby ensuring the construction safety of arc welding operations.

[0049] Furthermore, according to a second aspect of the present invention, an arc welding workstation is provided, comprising the aforementioned smoke exhaust system fire arrester. During use, the arc welding workstation can effectively control fire and ensure operational safety due to the installation of the aforementioned smoke exhaust system fire arrester.

[0050] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. A fire arrester for a smoke exhaust system, characterized in that: The fire arrester for the smoke exhaust system includes a smoke hood group, a fire baffle and a fire arrester assembly. The smoke hood group includes a hood body, an inlet end and a pipe body. The inlet end is connected to the pipe body. The hood body extends outward from the outer periphery of the inlet end. The fire baffle is arranged at the bottom of the hood body. The fire baffle covers the inlet of the inlet end. The fire arrester assembly is arranged on the pipe body. The fire-blocking assembly includes a fire-proof filter box and a spark arresting box sequentially arranged along the pipeline body. Flame-retardant filter cotton is arranged inside the fire-proof filter box, and a filter mesh is arranged inside the spark arresting box.

2. The fire arrester for a smoke exhaust system according to claim 1, characterized in that: A gap is formed between the fire baffle and the inlet of the inlet end; The fire baffle is formed as a disc-shaped component, the inlet of the inlet end is circular, and the diameter of the fire baffle is twice the diameter of the inlet of the inlet end.

3. The fire arrester for a smoke exhaust system according to claim 2, characterized in that: The distance between the outer periphery of the fire baffle and the cover body is one quarter of the diameter of the fire baffle.

4. The fire arrester for a smoke exhaust system according to claim 1, characterized in that: The fireproof filter box includes a first box body, a filter cotton roller and the flame-retardant filter cotton. The interior of the first box body is hollow, and the two ends of the first box body are respectively connected to the inlet end and the pipeline body. The two side surfaces of the first box body facing each other are each provided with a through hole for the flame-retardant filter cotton to pass through. The filter cotton roller is arranged on the outer side wall of the first box body, and the flame-retardant filter cotton is formed into a roll structure, and the roll structure is mounted on the filter cotton roller.

5. The fire arrester for a smoke exhaust system according to claim 4, characterized in that: The first box body further includes a maintenance opening and a maintenance door, and the maintenance door is pivotally arranged on the maintenance opening.

6. The fire arrester for a smoke exhaust system according to claim 1, characterized in that: The fireproof filter box includes a first box body and flame-retardant filter cotton. The interior of the first box body is hollow. The two ends of the first box body are respectively connected to the inlet end and the pipeline body. The flame-retardant filter cotton is arranged in the middle of the first box body.

7. The fire arrester for a smoke exhaust system according to claim 1, characterized in that: The spark arrester box further includes a second box body, the filter element is a drawable filter, the second box body is disposed on the pipe body, and the drawable filter is slidably disposed on the second box body.

8. The fire arrester for a smoke exhaust system according to claim 7, characterized in that: A replacement port is provided on the first side surface of the second box body, the size of the replacement port corresponds to the thickness of the extractable filter screen, and a pulling handle is provided on one end of the extractable filter screen away from the replacement port.

9. The fire arrester for a smoke exhaust system according to claim 1, characterized in that: The spark arrester box further includes a second box body, which is disposed on the pipe body, and the filter element is disposed inside the second box body.

10. An arc welding workstation, characterized in that: The arc welding workstation includes the fire arrester for a smoke exhaust system according to any one of claims 1 to 9.

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