CN112315103A - Safety helmet for lifesaving and fire fighting - Google Patents

Abstract

The invention relates to the field of fire helmets and discloses a life-saving and fire-fighting safety helmet which comprises a fire helmet body, wherein a fire-proof sealing sleeve for sealing is arranged at the bottom of the fire helmet body, a visor is arranged on the front side of the fire helmet body, helmet outer edge plates positioned on the upper side and the lower side of the visor are arranged on the fire helmet body, and a cleaning wiping plate capable of moving up and down is arranged between the two helmet outer edge plates. This safety helmet for lifesaving fire control wipes the board through the standing up of locating helmet eyepiece department, through the circular telegram outage of control electro-magnet, cooperation reset spring's elasticity for the board is wiped in the clearance moves up, moves down, carries out twice clearance to the goggles, and the goggles is when attached to because of the smoke and dust at the scene of fire, when leading to the fire fighter unclear field of vision, carries out the smoke and dust clearance, and the field of vision when having ensured fire fighter rescue work to go on is clear, avoids directly wiping with the hand, because of the dirty problem of polluting the goggles once more on the hand.

Description

Safety helmet for lifesaving and fire fighting

Technical Field

The invention relates to the field of fire helmets, in particular to a safety helmet for life saving and fire fighting.

Background

The fire fighting mainly comprises the rescue of personnel on the fire scene, the rescue of important facility equipment and cultural relics, the safety protection and rescue of important property, the extinguishment of fire and the like, wherein the safety helmet for fire fighting is equipment which is worn by fire fighters during the rescue work and is used for protecting the heads of the fire fighters, and is matched with a fire-fighting suit to supply fire protection for the fire fighters so as to facilitate the rescue work of the fire fighters.

However, current safety helmet for fire control is when using, easy on the goggles of safety helmet because of the smoke and dust that the regional conflagration of rescue produced, lead to the rescue personnel field of vision unclear, influence going on of rescue work, and the fire fighter if directly clean with the hand, pollute the problem of goggles once more because of dirt on the hand easily, and simultaneously, when the fire fighter, carry out rescue work in the rescue, when can't throw off both hands, can't in time clear up the smoke and dust on the goggles, thereby lead to the fire fighter field of vision unclear, influence the problem of rescue efficiency.

Disclosure of Invention

The invention provides a safety helmet for lifesaving and fire fighting, which has the advantage of ensuring clear vision of fire fighters and solves the technical problems in the background technology.

In order to achieve the above purpose, the invention provides the following technical scheme to realize: a safety helmet for life saving and fire fighting comprises a fire helmet body, wherein a fire-proof sealing sleeve for sealing is arranged at the bottom of the fire helmet body, a protective glass is arranged on the front side of the fire helmet body, helmet outer edge plates which are positioned on the upper side and the lower side of the protective glass are arranged on the fire helmet body, a cleaning plate capable of moving up and down is arranged between the two helmet outer edge plates, the inner side of the cleaning plate is attached to the outer surface of the protective glass, return springs positioned on the two sides of the helmet outer edge plates are arranged above the cleaning plate, the cleaning plate is positioned on one helmet outer edge plate below the fire helmet body under the elastic force of the return springs, electromagnets are arranged on the two sides of the bottom of the helmet outer edge plate, magnetic plates positioned right above the two electromagnets are arranged on the two sides of the bottom of the cleaning plate, and the magnetic poles in the electrifying state of the electromagnets are the same as the magnetic, the fire fighting helmet comprises a fire fighting helmet body and is characterized in that batteries used for supplying power to electromagnets are arranged on two sides of the fire fighting helmet body, a breathing ventilation pipe located below a visor is further arranged on the front side of the fire fighting helmet body, the breathing ventilation pipe is communicated with an inner cavity of the fire fighting helmet body, a one-way air inlet pipe is arranged in the middle of the front side of the breathing ventilation pipe, and an expiration pipe mechanism is communicated with the side face of the breathing ventilation pipe.

Optionally, the expiratory tube mechanism comprises an exhaust tube in threaded sleeve connection with the breathing vent tube, an exhaust valve slot located at the breathing vent tube is formed in the side surface of the exhaust tube, sealing ring plates are fixedly sleeved on both sides of the exhaust tube, a net tube is arranged on the outer sides of the two sealing ring plates, a sealing plate is arranged on one side of the exhaust tube away from the breathing vent tube, a sealing box is fixedly connected to the side surface of the sealing plate, a linkage shaft is movably sleeved in the middle of the sealing plate, a moving contact located inside the sealing box is fixedly connected to one end of the linkage shaft, a positioning contact located on one side of the moving contact is fixedly connected to the side wall of the sealing box, a valve block located at the exhaust valve slot is arranged in the exhaust tube, a spring telescopic rod is fixedly connected to the side surface of the valve block, the spring telescopic rod is in transmission connection with one, the positive pole of the battery is electrically connected with the positioning contact through a lead, the negative pole of the battery is electrically connected with one end of the coil on the electromagnet through a lead, and the other end of the coil is electrically connected with the movable contact through a lead.

Optionally, the equal fixedly connected with limiting plate in both sides of board, two is wiped in the clearance two location axles of fixedly connected with between the board are followed outward to the helmet, and two location axles cup joint with two limiting plate activities respectively, reset spring activity suit is epaxial in the location, and reset spring's both ends respectively with the top of limiting plate and the helmet along the bottom fixed connection of board outward.

Optionally, the protection boxes are sleeved on two sides of the helmet outer edge plate below the fire-fighting helmet body, the electromagnet is arranged in the electromagnet, and the top of the electromagnet is fixedly connected with a metal plate located below the magnetic plate.

Optionally, the spring telescopic link is kept away from the one end fixedly connected with sliding block of valve piece, the side of sliding block and the one end screw thread of universal driving shaft cup joint, be equipped with movable suit between sliding block and the closing plate and be equipped with the positioning spring on the universal driving shaft, the air channel has all been seted up to the both sides of sliding block, the inside height value of air channel evenly reduces from left to right, the air channel is located one side of sliding block, and the horizontal spacing value of air channel and sliding block is greater than the spacing value of mobile contact and positioning contact.

Optionally, the sealing plate is in threaded sleeve connection with the exhaust pipe, the outer edge of the sealing plate is fixed to the side face of the sealing ring plate through screws, a plurality of positioning connecting shafts located on the inner side of the net pipe are fixedly connected between the two sealing ring plates, and the outer sides of the positioning connecting shafts are in contact with the inner side of the net pipe.

The invention provides a safety helmet for lifesaving and fire fighting, which has the following beneficial effects:

1. according to the life-saving and fire-fighting safety helmet, the cleaning and wiping plate moves up and down by controlling the power-on and power-off of the electromagnet through the standing wiping plate arranged at the eyepiece of the helmet and matching with the elasticity of the reset spring, so that the protective goggles can be cleaned twice, when the visual field of firemen is unclear due to the attachment of smoke dust on the fire scene, smoke dust cleaning is carried out, the clear visual field of the firemen during rescue is ensured, and the problems that the protective goggles are directly cleaned by hands and are polluted again due to the dirt on the hands are avoided; moreover, the goggles are electrified to clean smoke dust on the goggles, the cleaning is stopped when the power is cut off, the battery is prevented from continuously providing electric power to drive the cleaning wiping plate to clean, and a power supply is saved.

2. This safety helmet for lifesaving fire control, structural design through breathing breather pipe, utilize the expiratory tube mechanism and the battery linkage on the breathing breather pipe, when the fire fighter normally breathes the gas, the electro-magnet is in the outage state, aggravate expiratory strength through the fire fighter, the air duct of flowing through is made to the air current of exhalation, make the sliding block drive the universal driving shaft, the whole right side of mobile contact moves, mobile contact and location contact, the electro-magnet circular telegram, produce ascending repulsion force to the magnetic sheet of clearance wiping the board bottom, control is taken off immediately and is wiped the board and reciprocate, clear up the smoke and dust on the goggles, so that the fire fighter carries out rescue work in the rescue, can't throw off both hands, control clearance wiping the board through heavy exhalation and clear the smoke and dust on the goggles and clear view, the effectual work of rescuing.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the exhalation tube mechanism of the structure of FIG. 1 according to the present invention;

FIG. 3 is a cutaway schematic view of FIG. 2 of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 1;

FIG. 5 is a schematic sectional view of the protective case of the structure of FIG. 4 according to the present invention;

fig. 6 is an electrical schematic diagram of the electromagnet of the structure of fig. 1 according to the present invention.

In the figure: 1. a fire-fighting helmet body; 101. goggles; 102. a fireproof sealing sleeve; 2. a helmet outer edge plate; 201. positioning the shaft; 3. cleaning the wiping plate; 301. a magnetic plate; 302. a limiting plate; 4. a return spring; 5. a battery; 6. a protection box; 601. an electromagnet; 602. a metal plate; 7. a breathing snorkel; 701. a one-way air inlet pipe; 8. an expiratory tube mechanism; 801. an exhaust pipe; 8011. a gas guide groove; 8012. an exhaust valve spool; 802. a seal ring plate; 8021. positioning the connecting shaft; 803. network management; 804. a sealing plate; 805. a sealing box; 9. a linkage shaft; 10. a movable contact; 11. a positioning spring; 12. a slider; 121. a vent channel; 13. a spring telescopic rod; 14. a valve block; 15. the contact is positioned.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, a life-saving and fire-fighting helmet comprises a fire-fighting helmet body 1, a fire-proof sealing sleeve 102 for sealing is arranged at the bottom of the fire-fighting helmet body 1, a protective goggles 101 is arranged on the front side of the fire-fighting helmet body 1, helmet outer edge plates 2 positioned at the upper side and the lower side of the protective goggles 101 are arranged on the fire-fighting helmet body 1, a cleaning wiping plate 3 capable of moving up and down is arranged between the two helmet outer edge plates 2, the inner side of the cleaning wiping plate 3 is attached to the outer surface of the protective goggles 101, return springs 4 positioned at the two sides of the helmet outer edge plate 2 are arranged above the cleaning wiping plate 3, the cleaning wiping plate 3 is positioned on one helmet outer edge plate 2 below the fire-fighting helmet body 1 under the elastic force of the return springs 4, electromagnets 601 are arranged at the two sides of the bottom of the helmet outer edge plate 2, magnetic plates 301 positioned right above the two electromagnets 601, the magnetic pole of the electromagnet 601 in the electrified state is the same as the magnetic pole at the bottom of the magnetic plate 301, the batteries 5 for supplying power to the electromagnet 601 are arranged on both sides of the fire-fighting helmet body 1, the breathing breather pipe 7 positioned below the goggles 101 is also arranged on the front side of the fire-fighting helmet body 1, the breathing breather pipe 7 is communicated with the inner cavity of the fire-fighting helmet body 1, the breathing breather pipe 7 can be directly sleeved with the mouth and nose of a fire fighter to avoid excessive waste of oxygen, the middle part of the front side of the breathing breather pipe 7 is provided with a one-way air inlet pipe 701, the side surface of the breathing breather pipe 7 is communicated with an expiratory pipe mechanism 8, the cleaning wiping plate 3 which can move longitudinally is arranged at the goggles 101, when the fire fighter enters a fire scene to rescue, the electromagnet 601 is electrified by controlling the electromagnet 601 to generate the repulsive force with the magnetic pole on the magnetic plate 301 at the bottom, the cleaning wiping plate 3 is enabled to move upwards rapidly, so that smoke dust attached to the goggles 101 is cleaned through the cleaning wiping plate 3, then the electromagnet 601 is controlled to be powered off, the repulsive force of the electromagnet 601 to the magnetic plate 301 disappears, the cleaning wiping plate 3 is enabled to move downwards by utilizing the elastic force of the magnetic plate 301 and stops after being cleaned again, the electromagnet 601 is powered on and powered off by utilizing the battery 5, the elastic force of the magnetic plate 301 is matched, when the smoke dust of the goggles 101 at a fire scene is attached, and the visual field of a fire fighter is unclear, the cleaning wiping plate 3 is enabled to move upwards and downwards, the smoke dust on the surface of the goggles 101 is cleaned, so that the situation that the rescued person is held by two hands when the fire fighter is used for rescuing, the situation that the fire fighter can see the situation of the fire scene in real time, the effective operation of rescue is ensured, the problem that the goggles are directly cleaned by hands and polluted again due to the, moreover, the goggles 101 are electrified to clean smoke dust, the power is cut off, cleaning is stopped, the battery 5 is prevented from continuously providing power to drive the cleaning wiping plate 3 to clean, and a power supply is saved.

Wherein, the expiratory tube mechanism 8 comprises an exhaust tube 801 in threaded sleeve connection with the breathing vent tube 7, an exhaust valve groove 8012 positioned at the breathing vent tube 7 is arranged on the side surface of the exhaust tube 801, sealing ring plates 802 are fixedly sleeved on both sides of the exhaust tube 801, a net tube 803 is arranged on the outer sides of the two sealing ring plates 802, a sealing plate 804 is arranged on one side of the exhaust tube 801 far away from the breathing vent tube 7, a sealing box 805 is fixedly connected on the side surface of the sealing plate 804, a linkage shaft 9 is movably sleeved in the middle of the sealing plate 804, one end of the linkage shaft 9 is fixedly connected with a movable contact 10 positioned in the sealing box 805, a positioning contact 15 positioned on one side of the movable contact 10 is fixedly connected on the side wall of the sealing box 805, a valve block 14 positioned at the exhaust valve groove 8012 is arranged in the exhaust tube 801, a spring telescopic rod 13 is fixedly connected, an air guide groove 8011 positioned in the network tube 803 is arranged on the exhaust pipe 801, the positive pole of the battery 5 is electrically connected with the positioning contact 15 through a conducting wire, the negative pole of the battery 5 is electrically connected with one end of a coil on the electromagnet 601 through a conducting wire, the other end of the coil is electrically connected with the mobile contact 10 through a conducting wire, one end of the one-way air inlet pipe 701 is communicated with the oxygen delivery pipe, the oxygen delivery pipe is sealed through the fireproof sealing sleeve 102, the introduced oxygen is directly positioned in the fire-fighting helmet body 1, when a fire fighter inhales oxygen, a valve block 14 in the exhaust pipe 801 blocks the exhaust valve groove 8012, the oxygen enters the breathing vent pipe 7 and the fire-fighting helmet body 1 from the one-way air inlet pipe 701, when the fire fighter exhales, the one-way air inlet pipe 701 stops oxygen entering, the exhaled gas acts on the valve block 14, so that the valve block 14, when the firefighter is in a fire scene to rescue, oxygen is provided, and when the firefighter exhales, the firefighter increases the exhalation intensity, the exhaled air flows through the ventilation groove 121, under the throttling action of the ventilation groove 121, the elastic force of the positioning spring 11 is overcome, so that the sliding block 12 drives the linkage shaft 9 and the movable contact 10 to integrally move right, the movable contact 10 is in contact with the positioning contact 15, the electromagnet 601 is electrified to generate upward repulsive force on the magnetic plate 301 at the bottom of the cleaning wiping plate 3, so that the cleaning wiping plate 3 overcomes the elastic force of the magnetic plate 301 to move upwards, after the exhalation is stopped, the sliding block 12 resets and moves under the elastic force of the positioning spring 11, the movable contact 10 is separated from the positioning contact 15, the electromagnet 601 is powered off, under the elastic force of the magnetic plate 301, the cleaning wiping plate 3 moves downwards, the goggles 101 are cleaned twice, so that the firefighter can rescue, the hands can not be separated, the cleaning plate 3 is controlled to clean smoke and dust on the goggles 101 through heavy expiration, the fire fighters are ensured to keep clear visual fields in real time, and rescue work is effectively carried out.

Wherein, the equal fixedly connected with limiting plate 302 in both sides of board 3 is wiped in the clearance, two locating shaft 201 of fixedly connected with between board 2 are followed outward to two helmets, and two locating shaft 201 cup joint with two limiting plate 302 activities respectively, reset spring 4 activity suit is on locating shaft 201, and reset spring 4's both ends respectively with the top of limiting plate 302 and the helmet outside along board 2's bottom fixed connection, it is spacing to clear up the limiting plate 302 of wiping board 3 both sides respectively through two locating shaft 201, when making limiting plate 302 reciprocate, the state that keeps stable, thereby ensure that the inboard of board 3 is wiped in the clearance can effectively laminate the surface of goggles 101, thereby be convenient for clear up the smoke and dust to goggles 101 surface, make fire fighter when rescue work, can keep clear field of vision.

Wherein, the protection box 6 is all overlapped to the helmet of fire control helmet body 1 below outside along the both sides of board 2, and in electro-magnet 601 was located electro-magnet 601, and electro-magnet 601's top fixedly connected with was located the metal sheet 602 of magnetic sheet 301 below, through preventing electro-magnet 601 in protection box 6, utilizes protection box 6 to seal, avoids electro-magnet 601 and wire contact site to expose outside, receives external environment influence, leads to the problem of contact failure.

Wherein, spring telescopic link 13 is kept away from one end fixedly connected with sliding block 12 of valve block 14, the side of sliding block 12 and the one end screw thread of universal driving shaft 9 cup joint, be equipped with movable suit locating spring 11 on universal driving shaft 9 between sliding block 12 and the closing plate 804, air channel 121 has all been seted up to the both sides of sliding block 12, the inside height value of air channel 121 evenly reduces from left to right, air guide channel 8011 is located one side of sliding block 12, and air guide channel 8011 is greater than the interval value of mobile contact 10 and locating contact 15 with the horizontal interval value of sliding block 12, make closing plate 804 threaded mounting on exhaust pipe 801, exhaust pipe 801 threaded mounting is on breathing breather pipe 7, under the prerequisite of the sealed effect of assurance exhaust pipe 801, be convenient for expiratory pipe mechanism 8's quick assembly.

The sealing plate 804 is in threaded sleeve connection with the exhaust pipe 801, the outer edge of the sealing plate 804 is fixed with the side faces of the sealing ring plates 802 through screws, a plurality of positioning connecting shafts 8021 located on the inner side of the mesh pipe 803 are fixedly connected between the two sealing ring plates 802, the outer sides of the positioning connecting shafts 8021 are in contact with the inner side of the mesh pipe 803, and the positioning connecting shafts 8021 are utilized to support the mesh pipe 803, so that the exhaled gas is prevented from being exhausted through the mesh pipe 803 when exhaling, and meanwhile, external air impurities are prevented from entering the exhalation pipe mechanism 8.

When the helmet is used, firstly, after a firefighter wears the helmet on the head, the helmet is matched with the fireproof sealing sleeve 102 and a firefighter uniform worn on the body to perform comprehensive fire prevention and smoke prevention, one end of the one-way air inlet pipe 701 is communicated with an oxygen delivery pipe to supply oxygen, when the firefighter inhales oxygen, the valve block 14 in the exhaust pipe 801 blocks the exhaust valve groove 8012, the one-way air inlet pipe 701 is opened to supply oxygen so that the firefighter inhales oxygen, when the firefighter exhales air, the one-way air inlet pipe 701 stops supplying oxygen, meanwhile, under the pressure action of the exhaled air, the valve block 14 is moved to be separated from the exhaust valve groove 8012, the exhaled air is discharged through the exhaust valve groove 8012, the vent groove 121, the air guide grooves 8011 and 803, when the goggles 101 on the fire helmet body 1 are attached with external smoke and the visual field of the firefighter is not clear, and when the firefighter cannot, the valve block 14 is moved to the right, in the process of expiration, the flow difference between the two sides of the vent groove 121 is utilized, the sliding block 12 drives the linkage shaft 9 and the movable contact 10 to move to the right, the movable contact 10 is in contact with the positioning contact 15, the electromagnet 601 is electrified to generate upward repulsive force on the magnetic plate 301 at the bottom of the cleaning wiping plate 3, the cleaning wiping plate 3 is made to move upwards by overcoming the elastic force of the magnetic plate 301, after expiration is stopped, the sliding block 12 resets and moves under the elastic force of the positioning spring 11, the movable contact 10 is separated from the positioning contact 15, the electromagnet 601 is powered off, under the elastic force of the magnetic plate 301, the cleaning wiping plate 3 moves downwards, and the goggles 101 are cleaned twice.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a safety helmet is used in lifesaving fire control, includes fire helmet body (1), its characterized in that: the fire-fighting helmet is characterized in that a fire-fighting sealing sleeve (102) used for sealing is arranged at the bottom of the fire-fighting helmet body (1), a visor (101) is arranged on the front side of the fire-fighting helmet body (1), helmet outer edge plates (2) positioned on the upper side and the lower side of the visor (101) are arranged on the fire-fighting helmet body (1), a cleaning wiping plate (3) capable of moving up and down is arranged between the two helmet outer edge plates (2), the inner side of the cleaning wiping plate (3) is attached to the outer surface of the visor (101), reset springs (4) positioned on the two sides of the helmet outer edge plates (2) are arranged above the cleaning wiping plate (3), the cleaning wiping plate (3) is positioned on one helmet outer edge plate (2) below the fire-fighting helmet body (1) under the elastic force of the reset springs (4), electromagnets (601) are arranged on the two sides of the bottom of the helmet outer edge plates (2), magnetic plates (301) positioned right above the two electromagnets (601) are arranged on the two sides of the bottom, and the magnetic pole of electro-magnet (601) on-state is the same with the magnetic pole of magnetic sheet (301) bottom, the both sides of fire helmet body (1) all are equipped with battery (5) that are used for supplying power to electro-magnet (601), the front of fire helmet body (1) still is equipped with respiratory breather pipe (7) that are located goggles (101) below, and respiratory breather pipe (7) communicates with each other with the inner chamber of fire helmet body (1), the positive middle part of respiratory breather pipe (7) is equipped with one-way intake pipe (701), the side of respiratory breather pipe (7) is switched on and is had expiratory pipe mechanism (8).

2. A life-saving and fire-fighting safety helmet as defined in claim 1, wherein: the breathing pipe mechanism (8) comprises an exhaust pipe (801) in threaded sleeve joint with the breathing ventilation pipe (7), an exhaust valve groove (8012) located at the breathing ventilation pipe (7) is formed in the side face of the exhaust pipe (801), sealing ring plates (802) are fixedly sleeved on the two sides of the exhaust pipe (801), a net pipe (803) is arranged on the outer sides of the two sealing ring plates (802), a sealing plate (804) is arranged on one side, away from the breathing ventilation pipe (7), of the exhaust pipe (801), a sealing box (805) is fixedly connected to the side face of the sealing plate (804), a linkage shaft (9) is movably sleeved in the middle of the sealing plate (804), a movable contact (10) located inside the sealing box (805) is fixedly connected to one end of the linkage shaft (9), and a positioning contact (15) located on one side of the movable contact (10) is fixedly connected to the side wall of, the exhaust pipe (801) is internally provided with a valve block (14) located at an exhaust valve groove (8012), the side face of the valve block (14) is fixedly connected with a spring telescopic rod (13), the spring telescopic rod (13) is in transmission connection with one end of a linkage shaft (9), the exhaust pipe (801) is provided with an air guide groove (8011) located in a net pipe (803), the positive pole of the battery (5) is electrically connected with a positioning contact (15) through a lead, the negative pole of the battery (5) is electrically connected with one end of a coil on the electromagnet (601) through a lead, and the other end of the coil is electrically connected with a movable contact (10) through a lead.

3. A life-saving and fire-fighting safety helmet as defined in claim 1, wherein: the equal fixedly connected with limiting plate (302) in both sides of board (3) is wiped in the clearance, two the helmet is outer along two location axle (201) of fixedly connected with between board (2), and two location axle (201) cup joint with two limiting plate (302) activities respectively, reset spring (4) activity suit is on location axle (201), and reset spring (4) both ends respectively with the top of limiting plate (302) and the helmet along the bottom fixed connection of board (2) outward.

4. A life-saving and fire-fighting safety helmet as defined in claim 1, wherein: the fire-fighting helmet is characterized in that protection boxes (6) are sleeved on two sides of a helmet outer edge plate (2) below the fire-fighting helmet body (1), the electromagnet (601) is arranged in the electromagnet (601), and the top of the electromagnet (601) is fixedly connected with a metal plate (602) located below the magnetic plate (301).

5. A life-saving and fire-fighting safety helmet as defined in claim 2, wherein: one end fixedly connected with sliding block (12) of valve piece (14) is kept away from in spring telescopic link (13), the side of sliding block (12) and the one end screw thread of universal driving shaft (9) cup joint, be equipped with positioning spring (11) of activity suit on universal driving shaft (9) between sliding block (12) and closing plate (804), air channel (121) have all been seted up to the both sides of sliding block (12), the inside height value of air channel (121) is evenly reduced from left to right, air channel (8011) is located one side of sliding block (12), and the horizontal spacing value of air channel (8011) and sliding block (12) is greater than the spacing value of mobile contact (10) and positioning contact (15).

6. A life-saving and fire-fighting safety helmet as defined in claim 2, wherein: the sealing plate (804) is in threaded sleeve joint with the exhaust pipe (801), the outer edge of the sealing plate (804) is fixed with the side face of the sealing ring plate (802) through screws, a plurality of positioning connecting shafts (8021) located on the inner side of the net pipe (803) are fixedly connected between the two sealing ring plates (802), and the outer side of each positioning connecting shaft (8021) is in contact with the inner side of the net pipe (803).

Images