An exhaust gas treatment device for a pipe

Abstract

The utility model discloses a kind of waste gas treatment devices for pipe fittings, comprising: waste gas treatment mechanism, gas guide mechanism and docking assembly, waste gas treatment mechanism is provided with for inhaling waste gas suction end, gas guide mechanism is suitable for with The suction end is communicated, docking assembly is correspondingly arranged with the gas guide mechanism, and located in the discharging direction of extruder, so that the pipe fittings extruded by the extruder pass through the docking assembly, and move towards the gas guide mechanism, wherein, the gas guide mechanism has initial state and gas guide state, when the gas guide mechanism is in the initial state, the gas guide mechanism is not connected with the docking assembly, when the gas guide mechanism is in the gas guide state, the gas guide mechanism is connected with the docking assembly, to set the gas guide mechanism on the outside of the pipe fittings, in this way, the gas guide mechanism can be covered on the outside of the pipe fittings between suction end and extruder, can effectively absorb waste gas, reduce the possibility of waste gas discharge.

Description

Technical Field

[0001] This application relates to the field of pipe fitting manufacturing technology, and further to a waste gas treatment device for pipe fittings. Background Technology

[0002] Plastic pipe fittings are now used in all aspects of our lives, ranking second in global usage among various synthetic materials. They are a type of pipe with high heat resistance, toughness, and ductility. Currently, plastic pipe fittings are mostly used in concealed engineering projects and have always received high attention and focus from end users.

[0003] The production of plastic pipe fittings generates a large amount of waste gas, mainly from processes such as raw material heating, melting, and extrusion. Specifically, the raw materials, various additives, stabilizers, and colorants used in the processing of pipe fittings release volatile organic compounds under high-temperature conditions. Teflon pipes, as an important category of pipe fittings, are widely used in important technological industries such as machinery, electronics, automobiles, aerospace, chemicals, computers, electrothermal, military, and communications.

[0004] Currently, in the critical plastic production process, the stock rod needs to be placed in the output end of the extrusion equipment. Under the action of the extrusion equipment, the stock rod is extruded through the die orifice to form a tubular structure. The extruded tube then undergoes a series of subsequent processes, and after cooling and solidification, it falls into a collection box to complete the production of the pipe fitting. During this process, an exhaust gas absorption device is required to absorb and treat the extruded pipe fitting. However, due to the limitations of the exhaust gas absorption device's structure, a large amount of exhaust gas is still directly discharged after the pipe fitting is extruded, which does not meet environmental protection requirements.

[0005] Therefore, this utility model aims to provide a waste gas treatment device for pipe fittings to solve the above-mentioned technical problems. Utility Model Content

[0006] To address the aforementioned technical problems, the purpose of this application is to provide a waste gas treatment device for pipe fittings, which aims to effectively reduce the waste gas diffused outward during pipe fitting extrusion by cooperating with the gas guiding mechanism and the docking assembly to cover the outside of the pipe fitting, thereby ensuring the safety of the environment and personnel.

[0007] To achieve the above objectives, this application provides a waste gas treatment device for pipe fittings, comprising:

[0008] The exhaust gas treatment mechanism is equipped with an intake end for drawing in exhaust gas;

[0009] An air guiding mechanism is adapted to be connected to the air intake end;

[0010] A docking assembly is provided corresponding to the air guiding mechanism and is located in the discharge direction of the extruder, so that the tube extruded by the extruder passes through the docking assembly and moves toward the air guiding mechanism;

[0011] The air guiding mechanism has an initial state and an air guiding state. When the air guiding mechanism is in the initial state, it is not connected to the docking component. When the air guiding mechanism is in the air guiding state, it is connected to the docking component so that the air guiding mechanism is sleeved on the outside of the pipe fitting.

[0012] In some embodiments, the air guiding mechanism includes:

[0013] The telescopic tube has a fixed end and a movable end, the fixed end being hermetically connected to the suction end so that the telescopic tube can communicate with the suction end, and the movable end having a first position state and a second position state in sequence in the direction close to the docking assembly.

[0014] A locking component, adapted to engage with the movable end;

[0015] When the air guiding mechanism is in the initial state, the movable end is in the first position state, and the locking component is in a limiting engagement with the movable end. When the air guiding mechanism is in the air guiding state, the locking component is released from the limiting engagement with the movable end, and the movable end is in the second position state.

[0016] In some embodiments, the docking assembly is disposed on the extruder, and the docking assembly is provided with a through hole for the tube to pass through.

[0017] In some embodiments, a connector is sleeved on the outer side of the movable end, the connector being used to engage with the docking assembly so that the air guiding mechanism is connected to the docking assembly.

[0018] In some embodiments, the locking assembly includes a support frame, a first limiting member, and a second limiting member disposed on the movable end, one end of the support frame being connected to the suction end;

[0019] The first limiting member is disposed at the other end of the support frame and is used to engage with the second limiting member to limit the movable end to the first position state.

[0020] In some embodiments, a closure component is also included, which is disposed on the telescopic tube or the locking component for opening or closing the opening at the movable end.

[0021] In some embodiments, the telescopic fitting is configured as a corrugated pipe. In some embodiments, the docking assembly includes a strut and a mounting base, the strut being mounted on the extruder;

[0022] One end of the mounting base is connected and fixed to the support rod, the through hole is opened at the other end of the support base, and a mounting groove for cooperating with the connector is provided on the periphery of the through hole.

[0023] In some embodiments, the waste gas treatment device includes:

[0024] An exhaust hood assembly, wherein an air inlet and an air outlet are provided on one side of the exhaust hood assembly, and the air inlet is used to form the air intake end;

[0025] The sintering furnace is connected to the gas outlet and to an external negative pressure device.

[0026] In some embodiments, the first limiting member and the second limiting member are respectively configured as a first magnetic attracting member and a second magnetic attracting member, and the first magnetic attracting member and the second magnetic attracting member are mutually attracted and cooperated.

[0027] Compared with the prior art, the exhaust gas treatment device for pipe fittings provided in this application has the following advantages:

[0028] 1. This utility model provides a waste gas treatment device for pipe fittings. This waste gas treatment device achieves efficient and portable waste gas treatment effect through the dynamic cooperation of the air guiding mechanism and the docking component. At the same time, it can effectively reduce the escape of waste gas. When the air guiding mechanism switches from the initial state to the air guiding state, the air guiding mechanism is connected to the docking component, so that the pipe fitting extruded by the extruder is placed in the air guiding mechanism, forming a closed waste gas collection channel. This allows the suction end of the waste gas treatment device to directly draw away the waste gas from the surface of the pipe fitting through the channel, reducing the possibility of waste gas escaping to the outside, thereby protecting the staff and the external environment. When the extruder does not extrude the pipe fitting, the air guiding mechanism is in the initial state (separated from the docking component), avoiding interference with the normal operation of production.

[0029] 2. The present invention provides a waste gas treatment device for pipe fittings. The locking assembly fixes the movable end of the telescopic pipe fitting in a first position. When the pipe fitting is extruded, the locking assembly is released, the telescopic pipe fitting is stretched, and the movable end moves to a second position and connects with the docking assembly to form a channel covering the outside of the pipe fitting. The suction end of the waste gas treatment mechanism continuously draws air through the fixed end of the telescopic pipe fitting, ensuring that the waste gas is fully absorbed when the pipe fitting is extruded, reducing the possibility of the waste gas spreading outward. The structure is simple and the operation is very convenient.

[0030] 3. The present invention provides a waste gas treatment device for pipe fittings, wherein a closing component is provided on the locking component or the telescopic component. When the gas guiding mechanism is in the gas guiding state, the closing component opens the opening at the fixed end of the telescopic pipe fitting so that the suction end can draw in waste gas through the telescopic pipe fitting. When the gas guiding mechanism is in the initial state, the closing component closes the opening at the fixed end of the telescopic pipe fitting, which can protect the waste gas treatment mechanism and reduce the possibility of impurities in the external environment entering. Attached Figure Description

[0031] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of this application.

[0032] Figure 1 This is a schematic diagram of the structure of a waste gas treatment device for pipe fittings in its initial state, provided by the utility model.

[0033] Figure 2 This is a schematic diagram of the structure of a waste gas treatment device for pipe fittings in the gas guiding state, provided by the utility model.

[0034] Figure 3 This is a structural schematic diagram of a locking component provided by the utility model;

[0035] Figure 4 This is a structural schematic diagram of a closure component provided by the utility model;

[0036] Figure 5 This is a structural schematic diagram of a docking component provided by the utility model.

[0037] Explanation of icon numbers:

[0038] Extruder 1, docking assembly 2, support rod 21, mounting base 22, air guiding mechanism 3, telescopic pipe 31, fixed end 311, movable end 312, support frame 313, base plate 3131, mounting shaft 3132, first limiting member 314, second limiting member 315, connecting member 316, closing assembly 4, cover plate 41, positioning pin 42, hinge 43, exhaust gas treatment mechanism 5, sintering furnace 51, cover 52, bottom shell 53, suction end 531. Detailed Implementation

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.

[0040] To keep the drawings concise, each drawing only schematically shows the parts relevant to the application; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one."

[0041] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0042] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. 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 the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0044] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] In one embodiment, an exhaust gas treatment device for a pipe fitting is described, which is designed to cooperate with the gas guiding mechanism 3 and the docking assembly 2 to cover the outside of the pipe fitting, thereby forming an exhaust gas collection channel on the extrusion movement path of the pipe fitting, which can fully absorb the exhaust gas and reduce the possibility of the exhaust gas generated during pipe fitting extrusion spreading outward.

[0046] Understandably, in the vertical extrusion process, the powdered raw material is first pre-compressed into rods, which are then manually loaded into the hydraulic cylinder of extruder 1 and extruded into tubes through the discharge end of the extruder. The extruded tubes then pass through a vent hood, a sintering furnace, and other processes before finally cooling and settling and falling into a receiving frame. Although the vent hood is connected to a harmful gas collection device, there is still a section of tube exposed to the air between the discharge end of the extruder and the vent hood. This causes harmful gases released during extrusion to directly escape into the surrounding environment at this point, failing to meet environmental emission requirements.

[0047] For this purpose, please refer to the accompanying drawings in the instruction manual. Figures 1 to 5 The waste gas treatment device of this embodiment is mainly used to effectively collect and treat the waste gas released from the extruded plastic pipes during the extrusion process. The waste gas treatment device of this application includes a waste gas treatment mechanism 5, a gas guiding mechanism 3, and a docking assembly 2. The waste gas treatment mechanism 5 is provided with an intake end 531, which is used to draw in waste gas through negative pressure. The waste gas drawn in through the intake end 531 moves to the corresponding treatment mechanism, ensuring that the waste gas is treated after absorption before being discharged, reducing its impact on the external environment. Correspondingly, one end of the gas guiding mechanism 3 is connected to the intake end 531 of the waste gas treatment mechanism 5, allowing the waste gas treatment mechanism 5 to draw in waste gas through the gas guiding mechanism 3.

[0048] The docking assembly 2 is positioned in the discharge direction of the extruder 1 and corresponds to the exhaust gas treatment mechanism 5. When the extruder 1 extrudes the tube, the tube moves towards the air guiding mechanism 3 and can pass through the docking assembly 2. Accordingly, the air guiding mechanism 3 has an initial state and an air guiding state. In the initial state, the air guiding mechanism 3 is not connected to the docking assembly 2. In the air guiding state, the air guiding mechanism 3 forms a sealed connection by docking with the docking assembly 2. The inner diameter of the air guiding mechanism 3 is slightly larger than the outer diameter of the tube, so that the air guiding mechanism 3 is fitted onto the outside of the tube, thereby forming an airflow channel around the tube for efficient collection of exhaust gas.

[0049] The working process is as follows: When the extruder 1 is not in operation, the air guiding mechanism 3 is in its initial state. When the extruder 1 starts operating, the air guiding mechanism 3 is in the air guiding state, connected to the docking assembly 2. The pipe extends from the discharge end of the extruder 1, passes through the docking assembly 2, and enters the air guiding mechanism 3. At this time, the suction end 531 provides continuous suction, causing the exhaust gas to enter the exhaust gas treatment mechanism 5 along the air guiding mechanism 3, thereby achieving effective treatment of the exhaust gas. This embodiment achieves the collection and treatment of exhaust gas during the pipe extrusion process by switching the state of the air guiding mechanism 3, reducing the possibility of exhaust gas being emitted into the workshop environment, meeting environmental protection requirements, and improving workplace safety.

[0050] In one embodiment, see the accompanying drawings. Figure 1 and Figure 2This embodiment further describes the air guiding mechanism 3. The air guiding mechanism 3 includes a telescopic tube 31 and a locking assembly. The telescopic tube 31 has a fixed end 311 and a movable end 312 adapted to engage with the locking assembly. The fixed end 311 is sealed to the intake end 531 of the exhaust gas treatment mechanism 5, thereby ensuring leak-free communication between the telescopic tube 31 and the exhaust gas treatment device, reducing the possibility of exhaust gas escaping and affecting the external environment. The movable end 312 is configured to move towards and away from the docking assembly 2.

[0051] Furthermore, the movable end 312 has a first position and a second position in sequence in the direction close to the docking component 2. When the movable end 312 is in the first position, the locking component engages with the movable end 312, causing the telescopic tube 31 to retract, and the movable end 312 is not connected to the docking component 2 at this time. Correspondingly, when the movable end 312 moves downward to the second position and engages with the docking component 2, the air guiding mechanism 3 is in the air guiding state. When the air guiding mechanism 3 is in the air guiding state, the tube extends into the telescopic tube 31, and the exhaust gas generated by the tube can only diffuse within the telescopic tube 31 and be absorbed by the suction end 531.

[0052] It should be noted that the telescopic fitting 31 can usually be made of corrugated pipe. Of course, in actual production applications, the telescopic fitting 31 can also be made of tubular components such as sleeve-type telescopic pipes that can achieve axial length changes. These will not be described in detail here, but are all within the protection scope of this utility model.

[0053] In one embodiment, the docking assembly 2 is further described. The docking assembly 2 is mounted on the extruder 1 and has a through hole for the pipe fitting to pass through.

[0054] Specifically, the docking assembly 2 includes a support rod 21 and a mounting base 22. The support rod 21 is mounted on the extruder 1 and is arranged along the discharge direction of the extruder 1. One end of the mounting base 22 is connected to the extruder, while a through hole is formed at the other end of the mounting base 22.

[0055] In addition, it should be noted that in order to achieve the absorption and treatment of exhaust gas by the air guiding mechanism 3 and reduce the possibility of exhaust gas escaping to the outside, the side of the mounting base 22 closest to the extruder 1 should be sealed to the extruder 1, so that a sealed airflow channel is formed between the extruder 1 and the suction end 531.

[0056] It is worth noting that, in order to improve the flexibility of the docking component 2, one end of the mounting base 22 is threadedly connected to the support rod 21 to adjust the height of the mounting base 22. When absorbing exhaust gas, the height of the mounting base 22 is lowered so that the mounting base 22 is sealed to the extruder 1. When the exhaust gas absorption is completed, the height of the mounting base 22 can be raised to leave space between the mounting base 22 and the extruder 1, which is convenient for cutting pipe fittings.

[0057] Furthermore, a connector 316 is fitted onto the outer side of the movable end 312. The connector 316 is used to engage with the docking component 2, that is, to engage with the other end of the mounting base 22, so that the air guiding mechanism 3 is connected to the docking component 2. There are several ways to connect the connector 316 to the mounting base 22. For example, a protrusion is provided on the side of the mounting base 22 near the air guiding mechanism 3, the protrusion is positioned along the outer periphery of the through hole, and the connector 316 is provided with an annular groove that matches the protrusion. The connection between the mounting base 22 and the connector 316 is achieved through the engagement of the annular groove and the protrusion. Alternatively, several evenly distributed positioning pins can be provided on the connector 316, and corresponding positioning holes can be provided on the mounting base 22. The connection between the mounting base 22 and the connector 316 is achieved through the insertion and engagement of the positioning pins and the positioning holes.

[0058] In one embodiment, see the accompanying drawings. Figure 3 This embodiment further describes the locking assembly. The locking assembly includes a support frame 313, a first limiting member 314, and a second limiting member 315 disposed on the movable end 312. One end of the support frame 313 is connected to the intake end 531 to mount the support frame 313 on the exhaust gas treatment device 5. Correspondingly, the first limiting member 314 is disposed at the other end of the support frame 313 and is used to engage with the second limiting member 315 to limit the movable end 312 to a first position.

[0059] Specifically, the support frame 313 includes a base plate 3131 and several mounting shafts 3132. The base plate 3131 is fixedly mounted at the suction end 531. The several mounting shafts 3132 are evenly distributed around the periphery of the telescopic tube 31. A first limiting member 314 is provided at the end of each mounting shaft 3132 away from the exhaust gas treatment device 5. A second limiting member 315 is provided on the movable end 312 and connected to the first limiting member 314, thereby fixing the movable end 312 in a first position. The first limiting member 314 and the second limiting member 315 are respectively configured as a first magnetic suction member and a second magnetic suction member. The second magnetic suction member is annularly sleeved on the outside of the movable end 312 and is provided on the upper end face of the connector 316 for adsorption and engagement with the first magnetic suction member to prevent the telescopic tube 31 from elongating.

[0060] In one embodiment, see the accompanying drawings. Figure 1 and Figure 4 An exhaust gas treatment device for pipe fittings also includes a closing component 4, which is disposed on the telescopic pipe fitting 31 or the locking component and is used to open or close the opening of the movable end 312, that is, to open or close the telescopic pipe fitting 31.

[0061] In this embodiment, the closing assembly 4 includes a cover plate 41, a positioning pin 42, and a hinge 43. The hinge 43 is mounted on one mounting shaft 3132 of the locking assembly. The cover plate 41 includes a cover plate body and a hinge portion vertically mounted on the cover plate body. The hinge portion is used to connect with the hinge 43. The cover plate 41 rotates to open or close the movable end 312. The positioning pin 42 is mounted on another mounting shaft 3132, and the cover plate body has a through hole that mates with the positioning pin 42.

[0062] When the air guiding mechanism 3 is in its initial state, the cover plate 41 covers the opening of the movable end 312 and engages with the positioning pin 42, thereby closing the opening and preventing impurities from the external environment from entering the telescopic pipe 31 and the exhaust gas treatment mechanism 5 through the opening. When the air guiding mechanism 3 is in the air guiding state, the positioning pin 42 separates from the cover plate 41, and the telescopic pipe 31 moves downward to connect with the docking assembly 2.

[0063] In one embodiment, see the accompanying drawings. Figure 1 The exhaust gas treatment mechanism 5 includes an exhaust hood assembly and a sintering furnace 51. The exhaust hood assembly includes a cover 52 and a bottom shell 53. The bottom shell 53 is located on the lower end face of the cover 52 and is connected to the cover 52. An air inlet is provided on the cover 52 to form an air intake end 531, and an air outlet is provided on the cover 52 for connection with the sintering furnace 51. The sintering furnace 51 is also connected to an external negative pressure device. The external negative pressure device generates negative pressure at the air intake end 531, thereby drawing the exhaust gas into the sintering furnace 51 for treatment through the telescopic pipe 31, the bottom shell 53, and the cover 52.

[0064] In use, first open the cover plate 41. The operator pulls the telescopic tube 31 downwards, overcoming the attraction of the first and second magnetic components, causing the movable end 312 to move to the second position. Then, the connecting plate 316 engages with the mounting base 22, connecting both ends of the telescopic tube 31 to the suction end 531 and the mounting base 22 respectively. After the extruder 1 extrudes the tube, it passes through the through hole of the mounting base 22 and moves into the telescopic tube 31. The exhaust gas generated by the tube can only diffuse within the telescopic tube 31 and exit through the exhaust gas treatment mechanism 5, preventing it from escaping to the outside, effectively reducing exhaust gas emissions and ensuring the safety of the operator and the environment. After one tube is extruded, release the engagement between the connecting piece 316 and the mounting base 22, and compress the telescopic tube 31. The second magnetic component engages with the first magnetic component, fixing the movable end 312 to the first position. Finally, rotate the cover plate 41 to engage with the positioning pin 42.

[0065] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A waste gas treatment device for pipe fittings, characterized in that, include: The exhaust gas treatment mechanism is equipped with an intake end for drawing in exhaust gas; An air guiding mechanism is adapted to be connected to the air intake end; A docking assembly is provided corresponding to the air guiding mechanism and is located in the discharge direction of the extruder, so that the tube extruded by the extruder passes through the docking assembly and moves toward the air guiding mechanism; The air guiding mechanism has an initial state and an air guiding state. When the air guiding mechanism is in the initial state, it is not connected to the docking component. When the air guiding mechanism is in the air guiding state, it is connected to the docking component so that the air guiding mechanism is sleeved on the outside of the pipe fitting.

2. The waste gas treatment device for pipe fittings according to claim 1, characterized in that, The gas guiding mechanism includes: The telescopic tube has a fixed end and a movable end, the fixed end is sealed to the air intake end so that the telescopic tube can communicate with the air intake end, and the movable end has a first position state and a second position state in sequence in the direction close to the docking component. A locking component, adapted to engage with the movable end; When the air guiding mechanism is in the initial state, the movable end is in the first position state, and the locking component is in a limiting engagement with the movable end. When the air guiding mechanism is in the air guiding state, the locking component is released from the limiting engagement with the movable end, and the movable end is in the second position.

3. The waste gas treatment device for pipe fittings according to claim 2, characterized in that, The docking assembly is mounted on the extruder, and the docking assembly has a through hole through which the tube passes.

4. The waste gas treatment device for pipe fittings according to claim 3, characterized in that, A connector is sleeved on the outer side of the movable end. The connector is used to engage with the docking component so that the air guiding mechanism is connected to the docking component.

5. The waste gas treatment device for pipe fittings according to claim 4, characterized in that, The locking assembly includes a support frame, a first limiting member, and a second limiting member disposed on the movable end, one end of the support frame being connected to the air intake end; The first limiting member is disposed at the other end of the support frame and is used to connect with the second limiting member to limit the movable end in the first position state.

6. A waste gas treatment device for pipe fittings according to any one of claims 2-5, characterized in that, It also includes a closure component, which is disposed on the telescopic tube or the locking component, for opening or closing the opening at the movable end.

7. The waste gas treatment device for pipe fittings according to claim 6, characterized in that, The telescopic fitting is a corrugated pipe.

8. The waste gas treatment device for pipe fittings according to claim 5, characterized in that, The docking assembly includes a strut and a mounting base, the strut being mounted on the extruder; One end of the mounting base is connected to the support rod, the through hole is opened at the other end of the mounting base, and the connector is used to connect to the mounting base.

9. A waste gas treatment device for pipe fittings according to claim 8, characterized in that, The waste gas treatment mechanism includes: An exhaust hood assembly, wherein an air inlet and an air outlet are provided on one side of the exhaust hood assembly, and the air inlet is used to form the air intake end; The sintering furnace is connected to the gas outlet and to an external negative pressure device.

10. A waste gas treatment device for pipe fittings according to claim 9, characterized in that, The first limiting member and the second limiting member are respectively configured as a first magnetic suction member and a second magnetic suction member, and the first magnetic suction member and the second magnetic suction member are mutually attracted and cooperated.

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