Automatic light changing protective cap for welding

Abstract

The invention provides an automatic light changing protective cap for welding, and relates to the field of welding protection. The automatic light-changing protective helmet for welding comprises a helmet shell, a head hoop used for wearing is arranged in the helmet shell, an automatic light-changing screen is arranged on the front portion of the helmet shell, an adjusting switch used for adjusting is arranged outside the helmet shell, and an exhaust assembly used for exhausting gas is arranged on the portion, located below the automatic light-changing screen, of the front portion of the helmet shell. The exhaust assembly comprises a fixed outer shell fixedly installed in the helmet shell, an exhaust filter piece used for filtering gas is arranged in the fixed outer shell, and a fixed plate is detachably connected to the front portion of the fixed outer shell. By arranging the exhaust assembly and the cleaning assembly, gas exhaled by a worker can be exhausted, moisture in air in the helmet shell is prevented from being increased, the exhausted gas is filtered and cooled, then gas is blown into the space on the two sides of the helmet shell and the outer surface of the automatic light changing screen, and the use comfort and convenience are improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding protection, in particular to an automatic darkening protective helmet for welding. Background Art

[0002] During the welding process, harmful light such as infrared and ultraviolet rays will be generated, and a large amount of toxic and harmful substances including heavy metal particles will also be generated. Therefore, people usually use protective masks for protection to ensure the health of workers.

[0003] In the existing technology, the automatic darkening welding helmet includes an automatic darkening screen, an adjustment switch, and a cap shell. The automatic darkening screen is composed of liquid crystal, electronic circuits, solar panels / batteries, sensors, and ultraviolet and infrared filters. When the welding arc occurs, the liquid crystal is instantly triggered to darken, the ultraviolet and infrared rays are reflected, and appropriate visible light is projected to the fundus, and the light transmission is reduced to an appropriate degree.

[0004] In the related technology, for example, the announcement number is: CN 219049130 U, an automatic darkening welding helmet using TYPE-C charging technology, including a cap body shell, a protective component is arranged inside the cap body shell, and a display mechanism is arranged inside the protective component for making corresponding changes according to the welding situation. The display mechanism is composed of a darkening filter component and a port component arranged on the darkening filter component. The port component includes: a shell, which is externally placed on the outside of the darkening filter component; and the TYPE-C charging interface and technology are used for the automatic darkening welding helmet.

[0005] In order to solve the problem that the hot air constantly exhaled from the mouth and nose of welders will cause fog inside the welding helmet, especially on the surface of the perspective window, affecting the operating field of vision, a welding mask with announcement number CN 109620538 B is provided, including a mask body; the top of the mask body is provided with a semi-enclosed cavity extending obliquely upward and opening outward to form an air inlet channel; a first filter is arranged at the air inlet of the air inlet channel; an air suction fan is arranged on the inner channel wall of the air inlet channel close to the human face; the middle part of the mask body is attached to the front of the human face to form a main channel; a second filter surrounded by the outer periphery of the nasal cavity for secondary filtering of air; and an exhaust fan is arranged at the bottom of the mask body.

[0006] However, it is impossible to clean floating objects such as dust on the outer surface of the automatic darkening screen, and the surface of the automatic darkening screen needs to be cleaned from time to time, which affects the convenience and comfort of use. Summary of the invention

[0007] 1. Technical issues to be solved

[0008] In view of the deficiencies in the prior art, the present invention provides an automatic darkening protective helmet for welding, which solves the problem that floating objects such as dust on the outer surface of the automatic darkening screen cannot be cleaned, affecting the convenience and comfort of use.

[0009] (II) Technical solution

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions: an automatic darkening protective helmet for welding, comprising a helmet shell, a headband for wearing is provided inside the helmet shell, an automatic darkening screen is provided at the front of the helmet shell, and an adjustment switch for adjustment is provided outside the helmet shell;

[0011] An exhaust assembly for exhausting gas is provided at the front of the cap shell and below the automatic dimming screen, the exhaust assembly includes a fixed outer shell fixedly installed in the cap shell, an exhaust filter for filtering gas is provided inside the fixed outer shell, a fixed plate is detachably connected to the front of the fixed outer shell, a side of the fixed plate close to the fixed inner shell is fixedly connected to the fixed inner shell, the exhaust filter is snap-fitted with the fixed inner shell, the fixed inner shell extends into the fixed outer shell, both sides of the face of the fixed outer shell are fixedly connected to extension tubes, a fixed holder is fixedly connected to the extension tube, a cooling member for cooling gas is snap-connected to the fixed holder, a cooling member is fixedly installed on the extension tube, the cooling member and the cooling member can conduct external temperature to the extension tube, and an end cap is threadedly connected to the end of the extension tube;

[0012] A cleaning component for guiding gas to blow toward the automatic darkening screen is provided on the cap shell and outside the automatic darkening screen;

[0013] Both sides of the face of the cap shell are provided with air intake components for gas entry, and a filter for filtering gas is provided inside the air intake component. The exhaust component provided can exhaust the gas exhaled by the staff, avoid the increase of air moisture in the cap shell, and avoid the appearance of fog on the inside of the automatic dimming screen. Especially in cold environments, it can significantly improve the visual state of the staff, and filter and cool the exhausted gas to facilitate subsequent cleaning operations; the cleaning component provided can blow gas into the space on both sides of the cap shell and the outer surface of the automatic dimming screen to avoid air-suspended particles adhering to the outer surface of the automatic dimming screen and affecting the staff's field of vision, thereby improving the comfort and convenience of use, and is especially suitable for use in complex welding processing environments.

[0014] Preferably, the cooling member includes a cooling tube, one end of the cooling tube away from the extension tube is fixedly connected to a fixed clamp engaged with a fixed clamp seat, an exhaust fan is fixedly mounted on the fixed clamp, cooling water is contained in the cooling tube, and long grooves are evenly arranged on the outer surface of the cooling tube; the cooling member includes a cooling arc member, the outer surface of the cooling arc member is fixedly connected to a conductive outer sheet, a connecting channel is arranged in the cooling arc member, the inner side of the cooling arc member is fixedly connected to a conductive inner sheet that can slide into the long groove, and the cooling member also includes a control component for controlling the speed of the exhaust fan. The cooling water in the cooling tube is used to absorb temperature and conduct the low temperature of the outside to the inner side of the exhaust filter to fully cool the exhaled gas.

[0015] Preferably, the cooling pipe is made of aluminum-copper alloy and can be inserted into the exhaust filter. The fixed card seat is evenly provided with fan-shaped card slots and mounting circular holes on the circumference. The cooling pipe is inserted into the mounting circular hole. The fixed card is evenly provided with card blocks on the circumference. The card blocks are engaged with the inner diameter side of the fan-shaped card slot. Aluminum-copper alloy has good temperature conductivity, ensuring that the temperature of the cooling pipe and the internal cooling water is low.

[0016] Preferably, the exhaust filter comprises a limiting frame, a card frame is fixedly connected to the limiting frame, a U-shaped socket is symmetrically fixedly connected to the fixed card frame, a water-absorbing filter plate is inserted in the socket, a filter outer ring is provided in the limiting frame, a support filter is fixedly connected inside the filter outer ring, a cleaning strip for eliminating odor is provided between adjacent support filters, and a filter inner ring is fixedly connected inside the support filter. The U-shaped socket can conveniently insert the water-absorbing filter plate, and it is convenient to replace and remove the water-absorbing filter plate. The cleaning strip can eliminate odor from the exhaust filter and improve the wearing comfort.

[0017] Preferably, the air intake assembly includes an air intake housing fixedly mounted in the cap shell, a side of the air intake housing close to the face is provided with a plurality of air intake holes, a side of the air intake housing away from the face is threadedly connected with an air intake cover, an air intake fan is fixedly mounted in the air intake cover, and a side of the air intake cover away from the face is provided with an air intake net. The plurality of air intake holes facilitate the entry of external gas, increase the air intake volume, and avoid the situation of insufficient oxygen.

[0018] Preferably, the filter element comprises an activated carbon element mounted in the air intake housing, the activated carbon element is provided with a plurality of through holes, and the interior of the activated carbon element is filled with a glass fiber filter disc covering the plurality of through holes. The activated carbon element has a good function of absorbing odors and impurities, and the glass fiber filter disc further improves the filtering performance and ensures the cleanliness of the inhaled gas.

[0019] Preferably, the cleaning assembly includes a cleaning shell fixedly mounted on the cap shell, an extension shell fixedly connected to the cleaning shell, a cleaning outlet is provided on the side of the extension shell close to the automatic darkening screen, an exhaust port is provided on the side of the cleaning shell away from the face, and the cleaning shell is connected to the extension tube through a hose. While providing cleaning, the cleaning shell and the extension shell also provide support points and protective edges for the whole, protect the internal automatic darkening screen, and increase the service life of the whole.

[0020] Preferably, the cleaning housing includes an inclined portion and a vertical portion, the inclined portion is longer than the vertical portion, the extended housing is adapted to the height of the automatic darkening screen, and the width of the exhaust port is smaller than the width of the cleaning outlet. The exhaust port with a smaller width is used to reduce the exhaust volume of the gas and increase the exhaust volume of the cleaning outlet, so that the airflow can cover the entire automatic darkening screen, ensuring a good cleaning effect.

[0021] (III) Beneficial effects

[0022] The present invention provides an automatic darkening protective helmet for welding, which has the following beneficial effects:

[0023] 1. The air intake assembly provided in the present invention can directly deliver filtered gas to the mouth and nose, thereby facilitating the breathing of the staff, preventing the staff from inhaling gas containing particulate matter, and ensuring the health of the staff.

[0024] 2. The exhaust assembly provided in the present invention can discharge the gas exhaled by the staff, avoid the increase of air moisture in the helmet shell, and avoid the formation of fog on the inner side of the automatic dimming screen. Especially in cold environments, it can significantly improve the visual state of the staff, and filter and cool the exhausted gas to facilitate subsequent cleaning operations.

[0025] 3. The cleaning component of the present invention can blow gas into the space on both sides of the cap shell and the outer surface of the automatic darkening screen to prevent air-suspended particles from adhering to the outer surface of the automatic darkening screen and affecting the vision of the staff, thereby improving the comfort and convenience of use, and is particularly suitable for use in complex welding processing environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall stereogram of the present invention;

[0027] Figure 2 It is a three-dimensional diagram of the disassembled state of the present invention;

[0028] Figure 3 is a perspective view of an exhaust assembly of the present invention;

[0029] Figure 4 are three-dimensional images of the cleaning assembly of the present invention from different viewing angles;

[0030] Figure 5 An exploded view of the exhaust filter of the present invention;

[0031] Figure 6 An exploded view of the air intake assembly of the present invention;

[0032] Figure 7 An exploded view of a cooling element portion of the present invention;

[0033] Figure 8 It is a schematic structural diagram of the activated carbon member of the present invention;

[0034] Fig. 9 A three-dimensional diagram of a cooling member of the present invention;

[0035] Fig.10 It is a three-dimensional view of the cooling element part of the present invention.

[0036] Among them, 1. cap shell; 2. headband; 3. adjustment switch; 4. air intake assembly; 5. exhaust assembly; 6. cleaning assembly; 7. automatic dimming screen; 401. air intake shell; 402. air intake hole; 403. activated carbon component; 4031. glass fiber filter; 404. air intake cover; 405. air intake fan; 406. air intake net; 501. fixing plate; 502. fixing inner shell; 503. exhaust filter; 5031. filter outer ring; 5032. support filter; 5033. filter inner ring; 5034. socket; 5035. bracket; 5036, limiting frame; 5037, water absorption filter plate; 504, fixed shell; 5041, extension pipe; 5042, fixed base; 505, cooling member; 5051, cooling pipe; 5052, long groove; 5053, fixed clamp; 5054, exhaust fan; 506, end cover; 507, cooling member; 5071, cooling arc member; 5072, conductive outer plate; 5073, connecting channel; 5074, conductive inner plate; 601, cleaning shell; 602, extension shell; 603, cleaning outlet; 604, exhaust outlet. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figure 1-Figure 10 As shown, an embodiment of the present invention provides an automatic darkening protective helmet for welding, comprising a helmet shell 1, a headband 2 for wearing is provided inside the helmet shell 1, an automatic darkening screen 7 is provided at the front of the helmet shell 1, and an adjustment switch 3 for adjustment is provided outside the helmet shell 1;

[0039] refer to Figure 1 The headband 2 is used for wear, and the automatic dimming screen 7 is used for automatic dimming. The automatic dimming screen 7 is composed of liquid crystal, electronic circuit, solar panel / battery, sensor and ultraviolet and infrared filters, etc. Its specific structure is the existing technology and will not be repeated. The adjustment switch 3 is used to adjust related functions such as shading degree, sensitivity, and delay time.

[0040] An exhaust assembly 5 for exhausting gas is provided at the front of the cap shell 1 and below the automatic dimming screen 7. The exhaust assembly 5 includes a fixed shell 504 fixedly installed in the cap shell 1. An exhaust filter 503 for filtering gas is provided inside the fixed shell 504. The exhaust filter 503 includes a limiting frame 5036. A bracket 5035 is fixedly connected to the limiting frame 5036. A U-shaped socket 5034 is symmetrically fixedly connected to the fixed bracket 5035. A water-absorbing filter plate 5037 is inserted into the socket 5034. A filter outer ring 5031 is provided inside the limiting frame 5036. A support filter 5032 is fixedly connected inside the filter outer ring 5031. A cleaning strip for eliminating odor is provided between adjacent support filters 5032. A filter inner ring 5033 is fixedly connected inside the support filter 5032.

[0041] refer to Figure 3 , Figure 5 The limiting frame 5036 and the fixed inner shell 502 cooperate with each other to partially limit the filter outer ring 5031 and ensure the stability of the installation state of the filter outer ring 5031. The water-absorbing filter plate 5037 is made of a water-absorbing material such as cotton, and is used to absorb moisture in the exhaust gas and perform preliminary filtration of the gas, which is very important especially in cold environments. This part corresponds to the mouth and nose. The bracket 5035 can be snapped together with the fixed inner shell 502 for easy removal and later maintenance and replacement. The filter outer ring 5031, the filter inner ring 5033 and the supporting filter element 5032 can filter the gas again and absorb the small water mist after cooling to ensure the dryness of the exhaust gas. The cleaning strip can be made of mint leaves and tea leaves to eliminate the odor of exhaled gas and increase wearing comfort.

[0042] The front part of the fixed outer shell 504 is detachably connected with a fixed plate 501, and a side of the fixed plate 501 close to the fixed inner shell 502 is fixedly connected with the fixed inner shell 502, the exhaust filter 503 is engaged with the fixed inner shell 502, and the fixed inner shell 502 extends into the fixed outer shell 504, and both sides of the face of the fixed outer shell 504 are fixedly connected with extension pipes 5041, and a fixed clamping seat 5042 is fixedly connected inside the extension pipe 5041;

[0043] refer to Figure 3The fixed plate 501 can be connected to the fixed shell 504 by screws, and the extension tube 5041 is used to provide space for the fixed base 5042 and extend the flow length of the gas, perform secondary cooling on the gas, and further ensure the dryness and low temperature of the gas exhaust.

[0044] The fixed base 5042 is connected with a cooling member 505 for cooling the gas, and the cooling member 505 includes a cooling pipe 5051. The cooling pipe 5051 is made of an aluminum-copper alloy and can be inserted into the exhaust filter 503. The fixed base 5042 is evenly provided with fan-shaped grooves and mounting holes on the circumference. The cooling pipe 5051 is inserted into the mounting hole. The fixed clamp 5053 is evenly provided with blocks on the circumference. The blocks and the inner diameter side of the fan-shaped grooves are mutually engaged. The end of the cooling pipe 5051 away from the extension tube 5041 is fixedly connected with a fixed clamp 5053 engaged with the fixed base 5042. An exhaust fan 5054 is fixedly installed on the fixed clamp 5053. The cooling pipe 5051 contains cooling gas. The outer surface of the cooling pipe 5051 is evenly provided with long grooves 5052, and the end of the extension pipe 5041 is threadedly connected with an end cap 506; a cooling member 507 is fixedly installed on the extension pipe 5041, and the cooling member 505 and the cooling member 507 can conduct the external temperature to the extension pipe 5041, and the cooling member 507 includes a cooling arc member 5071, and the outer surface of the cooling arc member 5071 is fixedly connected with a conductive outer sheet 5072, and a connecting channel 5073 is provided in the cooling arc member 5071, and the inner side surface of the cooling arc member 5071 is fixedly connected with a conductive inner sheet 5074 that can slide into the long groove 5052, and the cooling member 505 also includes a control component for controlling the speed of the exhaust fan 5054;

[0045] refer to Figure 7The conductive outer sheet 5072 is located on the outside of the extension tube 5041 and can conduct the external temperature. When the external temperature is low, the temperature of the conductive outer sheet 5072 decreases and is then conducted to the cold arc member 5071, and then to the conductive inner sheet 5074, and then to the cooling tube 5051. The connecting channel 5073 can cool the gas while the gas passes through it, which is suitable for welding work in a low-temperature environment. The long groove 5052 is used for the installation and use of the conductive inner sheet 5074, and is convenient for liquefied small water droplets to flow into the exhaust filter 503. The cooling member 505 and the cold conductive member 507 are used to transfer the cold temperature of the outside into the exhaust filter 503, absorb the temperature of the exhaled gas, reduce the gas temperature, and the gas The trace moisture in the pre-cooling liquefaction can be liquefied into a small water mist, which falls into the exhaust filter 503 under the action of gravity. The fan-shaped slot not only provides a snap-in position for the card block, but also facilitates the gas circulation and discharge. The exhaust fan 5054 is used to exhaust the gas. Among them, the control component can be a speed controller. The speed of the exhaust fan 5054 can be directly controlled by manual operation of the speed controller to adapt to the welding working environment that requires strong airflow. It can also avoid the exhaust fan 5054 always being in a high-speed working state to save energy, or use an airflow velocity sensor installed in the extension tube 5041. When the airflow velocity is small, increase the speed of the exhaust fan 5054 to ensure that the blowing intensity is sufficient to clean the dust on the surface of the automatic dimming screen 7.

[0046] A cleaning assembly 6 for guiding gas to blow toward the automatic darkening screen 7 is provided on the cap shell 1 and outside the automatic darkening screen 7. The cleaning assembly 6 includes a cleaning shell 601 fixedly mounted on the cap shell 1. The cleaning shell 601 includes an inclined portion and a vertical portion. The inclined portion is longer than the vertical portion. The extension shell 602 is adapted to the height of the automatic darkening screen 7. The width of the exhaust port 604 is smaller than the width of the cleaning outlet 603. The cleaning shell 601 is fixedly connected with an extension shell 602. A cleaning outlet 603 is provided on a side of the extension shell 602 close to the automatic darkening screen 7. An exhaust port 604 is provided on a side of the cleaning shell 601 away from the face. The cleaning shell 601 is communicated with the extension tube 5041 through a hose.

[0047] refer to Figure 1 , Figure 3 , Figure 4 During the cleaning operation, the gas input from the extension tube 5041 can be discharged from the exhaust port 604 and the cleaning port 603. The exhaust port 604 blows directly to the outside to blow away the suspended particles from the outside, and the cleaning port 603 blows away the dust on the surface of the automatic darkening screen 7 to prevent the suspended particles from adhering to the automatic darkening screen 7 and blurring the field of vision, thereby ensuring a good field of vision. There is no need to clean and wipe the automatic darkening screen 7 multiple times to avoid damage to the outer screen of the automatic darkening screen 7.

[0048] Both sides of the face of the cap shell 1 are provided with an air intake assembly 4 for gas to enter, and a filter element for filtering gas is provided inside the air intake assembly 4, and the filter element includes an activated carbon element 403 mounted in the air intake housing 401, and a plurality of through holes are opened on the activated carbon element 403, and the interior of the activated carbon element 403 is filled with a glass fiber filter 4031 covering the plurality of through holes;

[0049] refer to Figure 2 , Figure 6 , Figure 8 After the external gas is transported in, it is filtered by the activated carbon piece 403 and the glass fiber filter 4031 to filter out the suspended particles, and the through holes on the activated carbon piece 403 can increase the amount of gas entering, ensure sufficient air intake, and increase breathing comfort.

[0050] The air intake assembly 4 includes an air intake shell 401 fixedly installed in the cap shell 1, and a plurality of air intake holes 402 are provided on the side of the air intake shell 401 close to the face, and an air intake cover 404 is threadedly connected to the side of the air intake shell 401 away from the face, an air intake fan 405 is fixedly installed in the air intake cover 404, and an air intake net 406 is provided on the side of the air intake cover 404 away from the face.

[0051] refer to Figure 2 , Figure 6 , Figure 8 During the air intake operation, the air intake fan 405 is powered on to transport the external gas into the filter through the activated carbon part 403 and the glass fiber filter 4031. The air intake net 406 is used to provide protection and increase the safety of the use process.

[0052] Working principle: when in use, the headband 2 is used to wear the entire cap shell 1 to the face, the cap shell 1 is tightly attached to the face, the automatic dimming screen 7 is used for automatic dimming, and the adjustment switch 3 is used to adjust related functions such as shading, sensitivity, and delay time. First, during the air intake operation, the air intake fan 405 is powered on to transport the external gas into the air through the air intake net 406, and the suspended particles are filtered out through the activated carbon part 403 and the glass fiber filter 4031, and the through holes on the activated carbon part 403 can increase the amount of gas entering, ensure sufficient air intake, and increase breathing comfort. The gas exhaled by the staff can be discharged by the exhaust fan 5054 when it is powered on. The water absorption filter plate 5037 absorbs moisture in the exhaust gas and performs preliminary filtration on the gas, which is very important especially in cold environments. This part corresponds to the mouth and nose. The filter outer ring 5031, the filter inner ring 5033 and the support filter 5032 can filter the gas again and absorb the small water mist after cooling to ensure the dryness of the exhaust gas. Component 505 is used to transfer the cold temperature of the outside world into the exhaust filter 503, absorb the temperature of the exhaled gas, and reduce the temperature of the gas. The trace moisture in the gas can be liquefied into a small mist, which falls into the exhaust filter 503 under the action of gravity. The fan-shaped card slot not only provides a card position for the card block, but also facilitates the circulation and discharge of gas. The cleaning strip can be made of mint leaves and tea leaves, which are used to eliminate the odor of the exhaled gas and increase the wearing comfort. Then the gas input from the extension tube 5041 can be discharged from the exhaust port 604 and the cleaning outlet 603. The exhaust port 604 blows directly to the outside to blow away the suspended particles from the outside. The cleaning outlet 603 blows away the dust on the surface of the automatic dimming screen 7 to avoid the suspended particles from the outside adhering to the automatic dimming screen 7 to blur the field of vision, thereby ensuring a good field of vision. There is no need to clean and wipe the automatic dimming screen 7 many times to avoid damage to the outer screen of the automatic dimming screen 7. Floating objects such as dust on the outer surface of the automatic dimming screen 7 can be cleaned to improve the convenience and comfort of use.

[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. An automatic darkening protective helmet for welding, comprising a helmet shell (1), a headband (2) for wearing is arranged inside the helmet shell (1), an automatic darkening screen (7) is arranged at the front of the helmet shell (1), and an adjustment switch (3) for adjustment is arranged outside the helmet shell (1), characterized in that: An exhaust assembly (5) for exhausting gas is provided at the front of the cap shell (1) and below the automatic dimming screen (7); the exhaust assembly (5) comprises a fixed outer shell (504) fixedly mounted inside the cap shell (1); an exhaust filter (503) for filtering gas is provided inside the fixed outer shell (504); a fixed plate (501) is detachably connected to the front of the fixed outer shell (504); a side of the fixed plate (501) close to the fixed inner shell (502) is fixedly connected to the fixed inner shell (502); the exhaust filter (503) is engaged with the fixed inner shell (502); the fixed The inner shell (502) extends into the fixed outer shell (504), and both sides of the face of the fixed outer shell (504) are fixedly connected with extension tubes (5041), and a fixed clamping seat (5042) is fixedly connected inside the extension tube (5041), and a cooling member (505) for cooling gas is snap-connected on the fixed clamping seat (5042), and a cooling member (507) is fixedly installed on the extension tube (5041), and the cooling member (505) and the cooling member (507) can conduct the external temperature to the extension tube (5041), and the end of the extension tube (5041) is threadedly connected with an end cover (506); A cleaning component (6) for guiding gas to blow toward the automatic darkening screen (7) is provided on the cap shell (1) and located outside the automatic darkening screen (7); Both sides of the face of the cap shell (1) are provided with air intake components (4) for gas to enter, and a filter element for filtering gas is provided inside the air intake component (4).

2. The automatic darkening protective helmet for welding according to claim 1, characterized in that: The cooling member (505) comprises a cooling pipe (5051), one end of the cooling pipe (5051) away from the extension pipe (5041) is fixedly connected to a fixing clamp (5053) engaged with a fixing clamp (5042), an exhaust fan (5054) is fixedly mounted on the fixing clamp (5053), cooling water is contained in the cooling pipe (5051), and long grooves (5052) are evenly arranged on the outer surface of the cooling pipe (5051); The cooling component (507) includes a cooling arc component (5071), the outer surface of which is fixedly connected to a conductive outer plate (5072), a connecting channel (5073) is provided inside the cooling arc component (5071), the inner side surface of which is fixedly connected to a conductive inner plate (5074) that can slide into the long groove (5052), and the cooling component (505) also includes a control component for controlling the rotation speed of the exhaust fan (5054).

3. The automatic darkening protective helmet for welding according to claim 2, characterized in that: The cooling pipe (5051) is made of aluminum-copper alloy and can be inserted into the exhaust filter (503). The fixed base (5042) is evenly provided with fan-shaped grooves and mounting circular holes on the circumference. The cooling pipe (5051) is inserted into the mounting circular hole. The fixed clamp (5053) is evenly provided with clamping blocks on the circumference. The clamping blocks are mutually engaged with the inner diameter side of the fan-shaped groove.

4. The automatic darkening protective helmet for welding according to claim 1, characterized in that: The exhaust filter (503) comprises a limiting frame (5036), a bracket (5035) is fixedly connected to the limiting frame (5036), a U-shaped socket (5034) is symmetrically fixedly connected to the fixed bracket (5035), a water-absorbing filter plate (5037) is inserted into the socket (5034), a filter outer ring (5031) is arranged inside the limiting frame (5036), a support filter (5032) is fixedly connected inside the filter outer ring (5031), a cleaning strip for eliminating odor, such as mint and tea, is arranged between adjacent support filters (5032), and a filter inner ring (5033) is fixedly connected inside the support filter (5032).

5. The automatic darkening protective helmet for welding according to claim 1, characterized in that: The air intake assembly (4) comprises an air intake housing (401) fixedly mounted in the cap shell (1); a plurality of air intake holes (402) are provided on a side of the air intake housing (401) close to the face; an air intake cover (404) is threadedly connected to a side of the air intake housing (401) away from the face; an air intake fan (405) is fixedly mounted in the air intake cover (404); and an air intake net (406) is provided on a side of the air intake cover (404) away from the face.

6. The automatic darkening protective helmet for welding according to claim 5, characterized in that: The filter element comprises an activated carbon element (403) snap-fitted and installed in an air intake housing (401), a plurality of through holes being provided on the activated carbon element (403), and a glass fiber filter sheet (4031) covering the plurality of through holes is filled inside the activated carbon element (403).

7. The automatic darkening protective helmet for welding according to claim 1, characterized in that: The cleaning assembly (6) comprises a cleaning shell (601) fixedly mounted on the cap shell (1); an extension shell (602) is fixedly connected to the cleaning shell (601); a cleaning outlet (603) is provided on a side of the extension shell (602) close to the automatic dimming screen (7); an exhaust port (604) is provided on a side of the cleaning shell (601) away from the face; and the cleaning shell (601) is communicated with the extension tube (5041) via a hose.

8. The automatic darkening protective helmet for welding according to claim 7, characterized in that: The cleaning housing (601) comprises an inclined portion and a vertical portion, the inclined portion is longer than the vertical portion, the extension housing (602) is adapted to the height of the automatic dimming screen (7), and the width of the air outlet (604) is smaller than the width of the cleaning outlet (603).

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