Waste gas collecting device for production of upper and lower stoppers of metal zipper

Abstract

The utility model discloses a waste gas collecting device for metal zipper upper and lower stopper production, which belongs to the field of metal zipper upper and lower stopper production and comprises a moving seat, a first waste gas collecting component, two groups of pressing components, a second waste gas collecting component and a metal zipper upper and lower stopper production equipment body. The first waste gas collecting assembly and the second waste gas collecting assembly are both arranged on the upper end face of the movable base and communicate with each other. According to the waste gas collecting device for production of the upper and lower stoppers of the metal zipper, disclosed by the utility model, the top of the waste gas filtering plate can be limited by the two groups of pressing assemblies, and meanwhile, the design of the slot is matched, so that the waste gas filtering plate can be quickly and easily mounted and dismounted from the waste gas collecting box finally; compared with traditional bolt type assembly, the waste gas filter plate assembly has the advantages that through cooperation of the abutting assemblies and the insertion grooves, the disassembly and assembly time of the waste gas filter plate can be greatly saved, the operation complexity in the assembly and disassembly process is reduced, and a large amount of time and manpower do not need to be consumed.

Description

Technical Field

[0001] The utility model belongs to the field of production of upper and lower stops for metal zippers, and in particular relates to an exhaust gas collection device for production of upper and lower stops for metal zippers. Background Art

[0002] The zipper is composed of chain teeth, a puller, upper and lower stops (front stop and rear stop) or locking parts. The chain teeth are the key part, which directly determines the side pull strength of the zipper. Generally, a zipper has two chain belts, each with a row of chain teeth, and the two rows of chain teeth are staggered. The puller clamps the chain teeth on both sides, and the chain teeth on both sides can be engaged or disengaged with the help of the pull loop.

[0003] When the upper and lower stops in the zipper are processed by a processing machine, a large amount of processing waste gas will be generated during the production process. These processing waste gases usually come from the processing and treatment process of metal materials. In order to improve the safety of the working environment, these waste gases usually need to be collected and harmlessly treated. In the traditional waste gas collection and treatment process, waste gas is usually adsorbed and collected by a waste gas filter plate. Considering that the waste gas filter plate is a consumable, it needs to be replaced under long-term adsorption treatment to better collect and treat the waste gas. The waste gas filter plate is mostly fixed in the waste gas treatment box by bolts. When replacing, the bolts must be unscrewed one by one and installed, which leads to long downtime and affects production efficiency. At the same time, there is a risk of damaging the waste gas filter plate or the installation position during the disassembly and installation process. At the same time, the traditional metal zipper upper and lower stops are usually designed for specific equipment or work areas when using waste gas collection devices. It is difficult to transfer when moving to different equipment, resulting in the need for multiple collection devices on the production line, which increases costs and management complexity. Therefore, in view of the above problems, a waste gas collection device for the production of metal zipper upper and lower stops is proposed to solve them. Utility Model Content

[0004] In response to one or more of the above-mentioned defects or improvement needs of the prior art, the utility model provides a waste gas collection device for the production of upper and lower stops of metal zippers, which has the advantages of being easy to move, thereby performing mobile waste gas collection and treatment for different equipment and quickly replacing waste gas treatment consumables.

[0005] To achieve the above-mentioned purpose, the utility model provides an exhaust gas collection device for the production of upper and lower stops of metal zippers, comprising a movable seat, a first exhaust gas collection component, two sets of pressing components, a second exhaust gas collection component and a main body of the upper and lower stops production equipment of metal zippers;

[0006] The first exhaust gas collecting component and the second exhaust gas collecting component are both arranged on the upper end surface of the movable seat and the two are arranged in communication;

[0007] The two groups of pressing components are both assembled in the first exhaust gas collecting component; the main body of the metal zipper upper and lower stop production equipment is arranged on one side of the moving seat;

[0008] The lower end surface of the moving seat is provided with four sets of universal wheels in a rectangular shape;

[0009] The first exhaust gas collection assembly comprises an exhaust gas collection box, which is a rectangular box structure and has a first exhaust gas collection cavity for accommodating gas therein, and a plurality of slots are vertically opened on the inner wall of the exhaust gas collection box, and the plurality of slots are arranged at intervals and each of which has an exhaust gas filter plate inserted therein;

[0010] The two groups of pressing components are both arranged on the inner top wall of the exhaust gas collecting box and abut against the top of the exhaust gas filter plate;

[0011] The second exhaust gas collection component includes an exhaust gas treatment box arranged on the upper end surface of the movable seat. The exhaust gas treatment box is a rectangular box structure and has a second exhaust gas collection cavity for accommodating gas formed therein. A plurality of exhaust gas treatment boxes are inserted at intervals in the exhaust gas treatment box.

[0012] As a further improvement of the utility model, the two groups of the pressure assemblies are arranged in parallel and both include a pressure seat arranged on the top wall of the exhaust gas collection box, a positioning shaft is fixedly arranged on the bottom of the pressure seat, and a sleeve shaft is slidably arranged on the outside of the positioning shaft; the bottoms of several sleeve shafts in the same group of pressure assemblies are commonly connected to a pressure plate.

[0013] As a further improvement of the utility model, a compression spring is sleeved on the outside of the sleeve shaft and the positioning shaft in each group of the pressing assembly, the top end of the compression spring is connected to the pressing seat, and the bottom end of the compression spring is connected to the pressing plate.

[0014] As a further improvement of the utility model, an air intake pipe is provided on one side of the waste gas collection box, an exhaust fan is installed in the air intake pipe, and one end of the air intake pipe is connected to the main body of the metal zipper upper and lower stop production equipment.

[0015] As a further improvement of the utility model, a cavity is formed between two adjacent partitions, and each of the cavities is filled with a non-woven fabric layer, a silica gel particle layer and an activated carbon particle layer respectively.

[0016] As a further improvement of the utility model, an air intake pipe is connected to one side of the exhaust gas treatment box, an air intake fan is installed in the air intake pipe, and one end of the air intake pipe is connected to the exhaust gas collecting box; a support seat is also installed on the upper end surface of the movable seat, an exhaust chimney is supported on the support seat, and the exhaust chimney is connected to the exhaust gas treatment box.

[0017] In general, compared with the prior art, the above technical solutions conceived by the utility model have the following beneficial effects:

[0018] The waste gas collection device for the upper and lower stops of the metal zipper of the present invention, in actual use, cooperates with the mutual movement of the waste gas filter plate and the multiple components in the pressing assembly. When the waste gas filter plate is inserted into the slot, the two sets of pressing assemblies set at this time can limit the top of the waste gas filter plate, so that the waste gas filter plate obtains appropriate pressing force during installation, and at the same time cooperates with the design of the slot, so that the waste gas filter plate can be quickly and easily installed and removed from the waste gas collection box. Compared with the traditional bolt-type assembly, the present application can greatly save the time of disassembly and assembly of the waste gas filter plate through the cooperation of the pressing assembly and the slot, and reduces the complexity of operations during installation and disassembly, so that the waste gas collection device can be more easily maintained, cleaned and the waste gas filter plate can be replaced without consuming a lot of time and manpower.

[0019] The utility model discloses a waste gas collection device for the production of upper and lower stops of metal zippers. The waste gas generated during the production of the upper and lower stops of the metal zippers can be collected and efficiently and harmlessly treated by means of a first waste gas collection component and a second waste gas collection component. The waste gas can be preliminarily adsorbed and treated by means of a waste gas filter plate, thereby removing metal debris mixed in the waste gas. The non-woven fabric layer, the silica gel particle layer and the activated carbon particle layer arranged in the second waste gas collection component can be further used to capture large particles of impurities and dust in the waste gas. The silica gel particle layer can further filter and adsorb fine particles and harmful gases, thereby helping to purify the waste gas and prevent pollution to the environment. At the same time, the activated carbon particle layer can effectively adsorb organic gases and odor substances in the waste gas generated during the production of the upper and lower stops of the metal zippers, thereby reducing the content of harmful components in the waste gas and improving the environmental impact of the waste gas.

[0020] The waste gas collection device for the production of upper and lower stops of metal zippers of the utility model has universal wheels arranged under the movable seat. In actual use, the universal wheels arranged can make the waste gas collection device of the present application have flexible mobility, so that it can be easily moved between different metal zipper upper and lower stop production equipment, thereby achieving comprehensive coverage of waste gas collection and treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall installation structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall installation cross-sectional structure of the second exhaust gas collection and treatment component of the utility model;

[0023] Figure 3 This is a schematic diagram of the overall installation cross-sectional structure of the first exhaust gas collection and treatment component of the utility model;

[0024] Figure 4 It is a schematic diagram of the overall installation structure of the pressing component of the utility model.

[0025] In all the drawings, the same figure marks represent the same technical features, specifically: 1. Moving seat; 11. Universal wheel; 2. First exhaust gas collecting assembly; 21. Exhaust gas collecting box; 22. Slot; 23. Exhaust gas filter plate; 24. Intake pipe; 25. Exhaust fan; 3. Pressing assembly; 31. Pressing seat; 32. Positioning shaft; 33. Sleeve shaft; 34. Compression spring; 35. Pressing plate; 4. Second exhaust gas collecting assembly; 41. Exhaust gas treatment box; 42. Partition; 43. Non-woven fabric layer; 44. Silica gel particle layer; 45. Activated carbon particle layer; 46. Intake pipe; 47. Intake fan; 48. Support seat; 49. Exhaust chimney; 5. Metal zipper upper and lower stop production equipment body. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example

[0028] Depend on Figure 1-4 Provided is an exhaust gas collection device for producing upper and lower stops of a metal zipper, comprising a movable seat 1, a first exhaust gas collection component 2, two sets of pressing components 3, a second exhaust gas collection component 4 and a main body 5 of the upper and lower stops of a metal zipper;

[0029] The first exhaust gas collecting assembly 2 and the second exhaust gas collecting assembly 4 are both arranged on the upper end surface of the movable seat 1 and the two are arranged in communication;

[0030] The two sets of pressing components 3 are both assembled in the first exhaust gas collecting component 2; the metal zipper upper and lower stop production equipment body 5 is arranged on one side of the moving seat 1;

[0031] The lower end surface of the mobile seat 1 is provided with four sets of universal wheels 11 in a rectangular shape;

[0032] The first exhaust gas collection assembly 2 includes an exhaust gas collection box 21, which is a rectangular box structure and has a first exhaust gas collection cavity for accommodating gas. A plurality of slots 22 are vertically opened on the inner wall of the exhaust gas collection box 21. The slots 22 are arranged at intervals and each slot has an exhaust gas filter plate 23 inserted therein.

[0033] The two sets of pressing components 3 are both arranged on the inner top wall of the exhaust gas collecting box 21 and abut against the top of the exhaust gas filter plate 23;

[0034] The second exhaust gas collecting assembly 4 includes an exhaust gas treatment box 41 arranged on the upper end surface of the movable seat 1. The exhaust gas treatment box 41 is a rectangular box structure and a second exhaust gas collection cavity for accommodating gas is formed therein. A plurality of exhaust gas treatment boxes 41 are inserted at intervals in the exhaust gas treatment box 41.

[0035] In the present embodiment, in actual use, by means of the mutual movement cooperation of the exhaust gas filter plate 23 and the multiple components in the pressing assembly 3, when the exhaust gas filter plate 23 is inserted into the slot 22, the two sets of pressing assemblies 3 set at this time can limit the top of the exhaust gas filter plate 23, so that the exhaust gas filter plate 23 obtains appropriate pressing force during installation, and at the same time cooperates with the design of the slot 22, so that the exhaust gas filter plate 23 can be quickly and easily installed and removed from the exhaust gas collection box 21; compared with the traditional bolt-type assembly, the present application can greatly save the time for disassembly and assembly of the exhaust gas filter plate 23 through the cooperation of the pressing assembly 3 and the slot 22, and reduce the complexity of operations during installation and disassembly, so that the exhaust gas collection device can be more easily maintained, cleaned and the exhaust gas filter plate 23 can be replaced without consuming a lot of time and manpower.

[0036] Furthermore, by setting up the first waste gas collecting component 2 and the second waste gas collecting component 4, it is possible to collect the waste gas generated during the production of the upper and lower stops of the metal zipper and perform efficient and harmless treatment, thereby effectively absorbing the organic gas and odorous substances in the waste gas generated during the production of the upper and lower stops of the metal zipper, as well as the large particle impurities and dust in the waste gas, thereby reducing the content of harmful components in the waste gas and improving the environmental impact of the waste gas.

[0037] Furthermore, by setting the universal wheels 11 under the mobile seat 1, in actual use, the set universal wheels 11 can make the exhaust gas collection device of the present application have flexible mobility, so that it can be easily moved between different metal zipper upper and lower stop production equipment, thereby achieving comprehensive coverage of exhaust gas collection and treatment; and it can avoid the cost of separately configuring exhaust gas treatment equipment for each device, and also reduce the time and labor cost required for moving the equipment.

[0038] Specifically, refer to Figure 3-4 The two groups of pressure assemblies 3 are arranged in parallel and both include a pressure seat 31 arranged on the top wall of the exhaust gas collecting box 21. A positioning shaft 32 is fixedly arranged at the bottom of the pressure seat 31, and a sleeve shaft 33 is slidably arranged outside the positioning shaft 32; the bottoms of several sleeve shafts 33 in the same group of pressure assemblies 3 are commonly connected to a pressure plate 35.

[0039] In this embodiment, when the pressing plate 35 is pushed by the user and moves upward, the sleeve shaft 33 can move into the positioning shaft 32, and the two pressing plates 35 in the two pressing assemblies 3 can move upward as a whole.

[0040] Specifically, refer to Figure 4 A compression spring 34 is sleeved on the outside of the sleeve shaft 33 and the positioning shaft 32 in each set of the pressing assembly 3. The top end of the compression spring 34 is connected to the pressing seat 31, and the bottom end is connected to the pressing plate 35.

[0041] In the present embodiment, in actual use, when the user needs to install the exhaust gas filter plate 23, the user inserts the exhaust gas filter plate 23 into the slot 22. During this period, the user pushes the pressure plate 35 upward. When the exhaust gas filter plate 23 is inserted into the slot 22, the user releases the push of the pressure plate 35. At this time, the compression spring 34 will be reset, so that the pressure plate 35 can move downward as a whole until the bottom of the pressure plate 35 contacts the top of the exhaust gas filter plate 23; under the reset pressure of the compression spring 34, the two pressure plates 35 can press against the top of the exhaust gas filter plate 23, thereby limiting the exhaust gas filter plate 23 and preventing the exhaust gas filter plate 23 from loosening.

[0042] Furthermore, by the tight pressure of the pressure plate 35 against the exhaust gas filter plate 23 and the extrusion and limiting of the compression spring 34, the pressure plate 35 can also limit the exhaust gas filter plates 23 of different sizes, thereby better adapting to the use of equipment of different specifications.

[0043] Specifically, refer to Figure 3 One side of the waste gas collecting box 21 is connected with an air intake pipe 24, and an exhaust fan 25 is installed in the air intake pipe 24. One end of the air intake pipe 24 is connected to the main body 5 of the metal zipper upper and lower stop production equipment.

[0044] In this embodiment, in a preferred embodiment, as in the embodiment Figure 1 As shown in the figure, a box cover is provided on the front end face of the waste gas collecting box 21, and a metal hinge is used to realize the rotatable installation on the waste gas collecting box 21; at the same time, the box cover is preferably kept sealed with the waste gas collecting box 21. When the waste gas filter plate 23 is installed in the first waste gas collecting component 2, the user can close the box cover of the waste gas collecting box 21 and connect the power supply to the exhaust fan 25. At this time, the exhaust fan 25 provided will generate suction, so as to utilize the suction pipe 24 to be connected with the main body 5 of the upper and lower stop production equipment of the metal zipper, so as to realize the exhaust gas in the main body 5 of the upper and lower stop production equipment of the metal zipper to be extracted and collected in the waste gas collecting box 21, thereby realizing the preliminary harmless treatment of the exhaust gas.

[0045] Specifically, refer to Figure 2A cavity is formed between two adjacent partitions 42, and each cavity is filled with a non-woven fabric layer 43, a silica gel particle layer 44 and an activated carbon particle layer 45.

[0046] In this embodiment, the waste gas filter plate 23 is provided to perform preliminary adsorption treatment on the waste gas generated during the production of the upper and lower stops of the metal zipper production equipment body 5, thereby removing metal debris mixed in the waste gas, and the non-woven gauze layer 43, silica gel particle layer 44 and activated carbon particle layer 45 provided in the second waste gas collecting component 4 can be further used to capture large particles of impurities and dust in the waste gas, and the silica gel particle layer 44 can further filter and adsorb fine particles and harmful gases, which helps to purify the waste gas and prevent pollution to the environment. At the same time, the activated carbon particle layer 45 can effectively adsorb organic gases and odor substances in the waste gas generated during the production of the upper and lower stops of the metal zipper, thereby reducing the content of harmful components in the waste gas and improving the environmental impact of the waste gas.

[0047] Specifically, refer to Figure 2 An air intake pipe 46 is connected to one side of the exhaust gas treatment box 41, and an air intake fan 47 is installed in the air intake pipe 46. One end of the air intake pipe 46 is connected to the exhaust gas collecting box 21; a support seat 48 is also installed on the upper end surface of the movable seat 1, and an exhaust chimney 49 is supported on the support seat 48, and the exhaust chimney 49 is connected to the exhaust gas treatment box 41.

[0048] In this embodiment, after the user connects the power supply to the suction fan 47, the exhaust gas generated in the main body 5 of the upper and lower stop production equipment of the metal zipper can gradually pass through the exhaust gas filter plate 23 through the extraction of the suction fan 47, so that the exhaust gas is initially adsorbed and treated by the exhaust gas filter plate 23; when the exhaust gas enters the exhaust gas treatment box 41 again through the air intake pipe 46, the exhaust gas can be further harmlessly treated by the non-woven gauze layer 43, the silica gel particle layer 44 and the activated carbon particle layer 45 arranged in the exhaust gas treatment box 41; and the exhaust gas after treatment can be discharged through the exhaust chimney 49.

[0049] The utility model is a waste gas collection device for the production of upper and lower stops of metal zippers:

[0050] Step 1: In actual use, when the user needs to install the exhaust gas filter plate 23, the box cover on the side of the exhaust gas collecting box 21 is opened to expose the cavity in the exhaust gas collecting box 21. At this time, the user can insert the exhaust gas filter plates 23 into the slots 22 one by one, so that a plurality of exhaust gas filter plates 23 are installed in a vertical state at intervals. During this period, the user needs to push the pressing plate 35 upward. When the pressing plate 35 moves upward, the pressing plate 35 set at this time can squeeze the compression spring 34, and at the same time make the sleeve shaft 33 move into the positioning shaft 32. At this time, the two pressing plates 35 in the two sets of pressing assemblies 3 can move upward as a whole;

[0051] Step 2: When the exhaust gas filter plate 23 is inserted into the slot 22, the user releases the push of the pressing plate 35, and the compression spring 34 is reset, so that the pressing plate 35 can move downward as a whole until the bottom of the pressing plate 35 contacts the top of the exhaust gas filter plate 23. At this time, under the reset pressure of the compression spring 34, the two pressing plates 35 can press the top of the exhaust gas filter plate 23, thereby limiting the position of the exhaust gas filter plate 23 and preventing the exhaust gas filter plate 23 from loosening.

[0052] Step 3: After the exhaust gas filter plate 23 is installed in the first exhaust gas collection component 2, the user can close the cover of the exhaust gas collection box 21 and connect the exhaust fan 25 and the suction fan 47 to the power supply. At this time, the exhaust fan 25 and the suction fan 47 will generate suction, so that the exhaust gas in the metal zipper upper and lower stop production equipment body 5 is connected to the suction pipe 24 to extract the exhaust gas in the metal zipper upper and lower stop production equipment body 5 into the first exhaust gas collection component 2 for collection. At this time, the exhaust gas can gradually pass through the exhaust gas filter plate 23 through the extraction of the suction fan 47, so that The waste gas filter plate 23 is used to complete the adsorption treatment of the waste gas; when the waste gas enters the waste gas treatment box 41 again through the air inlet pipe 46, the waste gas can be further harmlessly treated by the non-woven gauze layer 43, the silica gel particle layer 44 and the activated carbon particle layer 45 arranged in the waste gas treatment box 41; and the waste gas after the treatment can be discharged through the exhaust chimney 49, and the first waste gas collection component 2 and the second waste gas collection component 4 can be set to collect the waste gas generated by the upper and lower stop production equipment body 5 of the metal zipper during production and carry out efficient and harmless treatment.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste gas collection device for the production of upper and lower stops of a metal zipper, characterized in that ； It comprises a movable seat (1), a first waste gas collecting component (2), two sets of pressing components (3), a second waste gas collecting component (4) and a main body (5) of a metal zipper upper and lower stop production device; The first exhaust gas collecting component (2) and the second exhaust gas collecting component (4) are both arranged on the upper end surface of the movable seat (1) and the two are arranged in communication; The two groups of pressing components (3) are both assembled in the first exhaust gas collecting component (2); the metal zipper upper and lower stop production equipment body (5) is arranged on one side of the moving seat (1); The lower end surface of the movable seat (1) is provided with four sets of universal wheels (11) in a rectangular distribution; The first exhaust gas collection component (2) comprises an exhaust gas collection box (21), the exhaust gas collection box (21) is a rectangular box structure and has a first exhaust gas collection cavity formed therein for accommodating gas, a plurality of slots (22) are vertically opened on the inner wall of the exhaust gas collection box (21), the plurality of slots (22) are arranged at intervals and each of which has an exhaust gas filter plate (23) inserted therein; The two groups of pressing components (3) are both arranged on the inner top wall of the exhaust gas collecting box (21) and abut against the top of the exhaust gas filter plate (23); The second exhaust gas collection assembly (4) comprises an exhaust gas treatment box (41) arranged on the upper end surface of the movable seat (1); the exhaust gas treatment box (41) is in the form of a rectangular box structure and has a second exhaust gas collection cavity formed therein for accommodating gas; a plurality of exhaust gas treatment boxes (41) are inserted at intervals inside the exhaust gas treatment box (41).

2. The waste gas collection device for the production of upper and lower stops of a metal zipper according to claim 1, characterized in that: The two groups of the pressing assemblies (3) are arranged in parallel and both include a pressing seat (31) arranged on the inner top wall of the exhaust gas collecting box (21); a positioning shaft (32) is fixedly arranged at the bottom of the pressing seat (31); a sleeve shaft (33) is slidably arranged outside the positioning shaft (32); and a plurality of the sleeve shafts (33) in the same group of pressing assemblies (3) are commonly connected to a pressing plate (35) at their bottoms.

3. The waste gas collection device for the production of upper and lower stops of a metal zipper according to claim 2, characterized in that: A compression spring (34) is sleeved on the outside of the sleeve shaft (33) and the positioning shaft (32) in each group of the pressing assembly (3). The top end of the compression spring (34) is connected to the pressing seat (31), and the bottom end is connected to the pressing plate (35).

4. The waste gas collection device for the production of upper and lower stops of a metal zipper according to claim 1, characterized in that: One side of the waste gas collection box (21) is connected to an air intake pipe (24), an exhaust fan (25) is installed in the air intake pipe (24), and one end of the air intake pipe (24) is connected to the main body (5) of the metal zipper upper and lower stop production equipment.

5. The waste gas collection device for the production of upper and lower stops of a metal zipper according to claim 1, characterized in that: A cavity is formed between two adjacent partitions (42), and each cavity is filled with a non-woven fabric layer (43), a silica gel particle layer (44) and an activated carbon particle layer (45).

6. The waste gas collection device for the production of upper and lower stops of a metal zipper according to claim 1, characterized in that: An air intake pipe (46) is connected to one side of the waste gas treatment box (41), and an air intake fan (47) is installed in the air intake pipe (46). One end of the air intake pipe (46) is connected to the waste gas collection box (21); a support seat (48) is also installed on the upper end surface of the movable seat (1), and an exhaust chimney (49) is supported on the support seat (48), and the exhaust chimney (49) is connected to the waste gas treatment box (41).

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