Ventilation gas mask

Abstract

The utility model discloses a ventilation gas mask, which relates to the technical field of ventilation gas masks and comprises a mask, a gas guide tube, a gas adjusting valve and a first exhaust valve. The air adjusting valve is installed at the end of the air guide pipe. The first exhaust valve is arranged on the mask and used for exhausting air from the inside to the outside of the mask in a single direction; the mask comprises a head sleeve part, a neckerchief part and a surrounding edge part, the head sleeve part comprises an opening with a cavity, the opening is used for allowing the head of the human body to penetrate through, and the cavity is used for containing the head of the human body; the neckerchief part is installed on the inner wall of the head sleeve part and is close to the opening, an annular ventilation cavity is formed by the neckerchief part and the inner wall of the head sleeve part, and the ventilation cavity is used for tightly surrounding the neck of the human body so as to seal the space between the neck of the human body and the opening of the mask; the surrounding edge part is connected to the opening position of the head sleeve part; the neckerchief part is provided with a second exhaust valve, the second exhaust valve is used for discharging air from the interior of the ventilation cavity to the headgear part in a single direction, and the air guide pipe communicates with the interior of the ventilation cavity and is used for conveying air into the ventilation cavity.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ventilation gas mask in the environment pollution working scene, especially ventilation gas mask. BACKGROUND

[0002] In the place where radioactive aerosol pollution may exist or is polluted, wearing ventilation gas mask is an important protection means. The neck of the ventilation gas mask on the market is not high in air tightness, and the clean air for breathing of the user cannot be ensured.

[0003] Therefore, the ventilation gas mask with simple structure and ensuring the sealing performance of the neck of the user is designed. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a ventilation gas mask, and the purpose is to design a ventilation gas mask ensuring the sealing performance of the neck of the user.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a ventilation gas mask, which comprises:

[0006] A mask is used for covering the head of a human body;

[0007] A gas guide pipe is communicated in the mask and used for conveying air into the mask;

[0008] A gas regulating valve is installed at the end of the gas guide pipe;

[0009] A first air exhaust valve is arranged on the mask and used for exhausting air from the inside of the mask to the outside in a single direction;

[0010] The mask comprises a head cover part, a neck cover part and a surrounding edge part, the head cover part comprises an opening with a cavity, the opening is used for passing the head of a human body, and the cavity is used for accommodating the head of a human body; the neck cover part is installed on the inner wall of the head cover part and arranged close to the opening, the neck cover part and the inner wall of the head cover part form an annular air passage, the air passage is used for tightly surrounding the neck of a human body outside to seal the neck of a human body and the opening of the mask; the surrounding edge part is connected to the opening position of the head cover part; a second air exhaust valve is arranged on the neck cover part and used for exhausting air from the inside of the air passage to the head cover part in a single direction; and the gas guide pipe is communicated in the air passage and used for conveying air into the air passage.

[0011] In an embodiment, the ventilation gas mask further comprises a communication member arranged on the mask and used for connecting the gas guide pipe and the air passage.

[0012] In an embodiment, the communication piece is a tee joint, the communication piece comprising an air inlet, a first air outlet and a second air outlet, the first air outlet being in communication with the air cavity; the ventilation gas mask further comprises an alarm and a connecting pipe, one end of the connecting pipe being connected to the second air outlet, the other end of the connecting pipe being connected to the alarm, and the alarm being installed in the head cover portion.

[0013] In an embodiment, the number of the second exhaust valves is two.

[0014] In an embodiment, the ventilation gas mask further comprises a waistband, and the air regulating valve is installed on the waistband.

[0015] In an embodiment, the head cover portion comprises a window strip extending from the front surface of the head cover portion to the surfaces on both sides to increase the visual angle of the user.

[0016] In an embodiment, a plurality of magic tapes are further arranged on the surrounding edge portion.

[0017] In an embodiment, the air regulating valve comprises a valve body and a male quick connector, the valve body having an air outlet pipe connected to the air guide pipe, and the male quick connector being used for connecting an external female quick connector.

[0018] In an embodiment, the mask further comprises a tear strip portion integrally arranged on the head cover portion.

[0019] In an embodiment, the surrounding edge portion further has an instrument window.

[0020] The ventilation gas mask of the technical scheme of the utility model, through setting up the neck warmer portion, forms the air cavity in the mask, the air cavity can be inflated under the action of high pressure gas, so that the opening position of the mask can be attached to the neck of the human body, to ensure the air tightness of the neck, avoid the polluted air outside from entering into the mask from the neck, can ensure that the operating personnel breathes the clean air. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in the drawings without creative labor.

[0022] Figure 1 The structure schematic view of one embodiment of the ventilation gas mask provided by the utility model;

[0023] Figure 2Part structure schematic view of one embodiment of the ventilation gas mask provided by the utility model;

[0024] Figure 3 Section structure schematic view of one embodiment of the ventilation gas mask provided by the utility model;

[0025] Figure 4 Structure schematic view of the communication pipe of one embodiment of the ventilation gas mask provided by the utility model;

[0026] Figure 5 Exploded structure schematic view of the communication pipe of one embodiment of the ventilation gas mask provided by the utility model;

[0027] Figure 6 Section structure schematic view of the communication pipe of one embodiment of the ventilation gas mask provided by the utility model;

[0028] Figure 7 Structure schematic view of the air adjusting valve of one embodiment of the ventilation gas mask provided by the utility model;

[0029] Figure 8 Structure schematic view of the alarm of one embodiment of the ventilation gas mask provided by the utility model;

[0030] Figure 9 Section structure schematic view of the alarm of one embodiment of the ventilation gas mask provided by the utility model;

[0031] Figure 10 Exploded structure schematic view of the alarm of one embodiment of the ventilation gas mask provided by the utility model.

[0032] Explanation of reference numerals:

[0033] 10, mask; 11, headgear section; 111, cavity; 112, opening; 113, window strip; 12, neck cover section; 13, border section; 14, air chamber; 15, magic tape; 16, tear strip; 17, instrument window; 20, air tube; 30, air regulating valve; 31, valve body; 32, male quick connector; 40, first exhaust valve; 50, second exhaust valve; 60, connecting piece; 61a, first air inlet; 61b, first air outlet; 61c, second air outlet; 61, first injection molding; 611, support tube section; 6111, second air inlet channel; 612, air inlet tube section; 6121, first air inlet channel; 6122, conical convex wall ring; 62, second injection molding; 621, positioning ring section; 622, connecting tube section; 6221, first air outlet channel; 623, air outlet tube section; 6231, second air outlet channel; 624, welding ring section; 625, reinforcing section; 70, alarm; 71, shell; 71a, second air inlet; 711, lower cylinder; 7111, first cylindrical cavity; 712, upper cylinder; 712a, air vent; 7121, second cylindrical cavity; 7121a, third cylindrical cavity; 7121b, fourth cylindrical cavity; 72, warning piece; 721, main body section; 722, sealing ring section; 723, connecting section; 73, elastic piece; 80, connecting tube; 90, waistband. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] It should be noted that if the present application embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0036] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes include "A and / or B" as an example, including A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0037] Please refer to Figures 1-10 An embodiment of the present application provides a ventilation gas mask, which comprises a mask 10, an air guide pipe 20, an air regulating valve 30, a first air exhaust valve 40 and a second air exhaust valve 50. The mask 10 is used for covering the head of a human body to isolate the head of the human body from the environment outside, so as to avoid breathing the polluted air outside and to ensure that the user can work in the polluted environment. The air guide pipe 20 is communicated with the inside of the mask 10 and is used for conveying the air for the worker to breathe into the inside of the mask 10. The air regulating valve 30 is installed at the end of the air guide pipe 20 and is used for controlling the size of the air inlet. The first air exhaust valve 40 is arranged on the mask 10 and is used for one-way air exhaust. The air in the inside of the mask 10 can be exhausted to the outside through the first air exhaust valve 40, but the air outside cannot enter the inside of the mask 10 through the first air exhaust valve 40.

[0038] The mask 10 comprises a head cover part 11, a neck cover part 12 and a surrounding edge part 13. The head cover part 11 comprises an opening 112 for passing the head of a human body, and a cavity 111 for accommodating the head of the human body. In use, the head of the human body passes through the opening 112 and enters the cavity 111. The neck cover part 12 is arranged on the inner wall of the head cover part 11 and close to the opening 112. The neck cover part 12 and the inner wall of the head cover part 11 form an annular ventilation cavity 14 for tightly surrounding the neck of the human body, so as to seal the neck of the human body and the opening 112 of the mask 10, and avoid the polluted air from the outside entering the mask 10 through the neck, and then polluting the air inside the mask 10. The surrounding edge part 13 is connected to the opening 112 of the head cover part 11, and is arranged on the shoulder of the human body, so as to ensure that the head cover part 11 is stably arranged. The second exhaust valve 50 is arranged on the neck cover part 12, and is used for unidirectionally exhausting air from the inside of the ventilation cavity 14 to the inside of the head cover part 11. The air guide pipe 20 is communicated with the ventilation cavity 14, and is used for conveying air to the ventilation cavity 14. In the present application, the neck cover part 12 is arranged to form the ventilation cavity 14 corresponding to the neck of the human body. The high-pressure air from the outside enters the ventilation cavity 14 through the air guide pipe 20, so that the ventilation cavity 14 is inflated and filled with the position of the neck of the user, so that the opening 112 of the head cover part 11 is attached to the neck of the human body, and the mask 10 can isolate the space above the neck, so as to avoid the polluted air from the outside entering the head cover through the gap of the neck, so as to ensure that the worker can breathe clean air, and then ensure the health of the worker.

[0039] In use of the ventilation head cover of the present application, the high-pressure air from the outside enters the air guide pipe 20 through the air regulating valve 30, and then enters the ventilation cavity 14 through the air guide pipe 20. The ventilation cavity 14 is communicated with the head cover part through the second exhaust valve 50. The second exhaust valve 50 is a one-way valve, and air can only be conveyed from the ventilation cavity 14 to the head cover part, so as to be breathed by the human body in the head cover part. Then, the air in the head cover part can be conveyed to the outside through the first exhaust valve 40. In use of the ventilation head cover of the present application, it is in a dynamic balance state, so as to ensure that sufficient air is provided for the user to breathe. It should be noted that the high-pressure air from the outside of the present application is air with a pressure of 6KG.

[0040] In an optional embodiment, the number of the second exhaust valves 50 is two, and the two second exhaust valves 50 are arranged at intervals, so as to ensure that the ventilation cavity 14 can be inflated, and thus the neck cover part 12 can be tightly attached to the neck of the human body, so as to ensure that the head cover part 11 is isolated from the outside.

[0041] The ventilation gas mask further comprises a connecting piece 60 arranged on the mask 10, and the connecting piece 60 is used to connect the air guide pipe 20 and the ventilation cavity 14. Specifically, the connecting piece 60 is arranged on the mask 10, and the connecting piece 60 can be welded to the mask 10 by welding, and the welding is high-frequency welding. The connecting piece 60 serves as a connecting component to connect the air guide pipe 20 and the ventilation cavity 14, so as to ensure that the air guide pipe 20 can maintain the shape at the position connected with the mask 10, and avoid the air guide pipe 20 from being wound, thereby affecting the normal breathing of the worker.

[0042] In an optional embodiment, the connecting piece 60 is a three-way connecting pipe, which comprises a first air inlet 61a, a first air outlet 61b and a second air outlet 61c, and the first air outlet 61b is connected with the ventilation cavity 14. The ventilation gas mask further comprises an alarm 70 and a connecting pipe 80, one end of the connecting pipe 80 is connected with the second air outlet 61c, and the other end is connected with the alarm 70, and the alarm 70 is arranged in the head cover part 11.

[0043] Specifically, the ventilation gas mask of the embodiment further comprises an alarm 70 and a connecting pipe 80, and the alarm 70 is used to monitor whether the pressure of the gas delivered from outside is normal. For example, when the delivered gas pressure is lower than 60KG, the alarm 70 will turn red to prompt the worker to immediately move away. The connecting piece 60 is a three-way connecting pipe, which comprises a first air inlet 61a, a first air outlet 61b and a second air outlet 61c. The first air outlet 61b is connected with the ventilation cavity 14, so as to provide air for the worker to breathe in the ventilation cavity 14. The air enters the ventilation cavity 14 from the first air outlet 61b, and then enters the head cover part 11 through the second exhaust valve 50. One end of the connecting pipe 80 is connected with the second air outlet 61c, and the other end is connected with the alarm 70, and the alarm 70 is arranged in the head cover part 11, so that the worker can directly watch the alarm 70 and be prompted. It should be noted that the alarm 70 is an IDB alarm 70.

[0044] In an alternative embodiment, the communication piece 60 comprises a first injection molded piece 61 and a second injection molded piece 62, one end of the first injection molded piece 61 is connected to the second injection molded piece 62, and the connection is achieved by one-piece injection molding. The injection molding is achieved by two-color injection molding, the first injection molded piece 61 has a higher hardness than the second injection molded piece 62, and the second injection molded piece 62 is used for high-frequency welding to the face shield 10 of the ventilation gas mask. The second injection molded piece 62 has a softer texture, so it can be conveniently connected to the face shield 10 by high-frequency welding, thereby fixing the position of the tee connector pipe. The first injection molded piece 61 has a harder texture, so the first injection molded piece 61 is not easy to deform, and it plays a supporting role, which can avoid the tee connector pipe being extruded by external pressure and deformed, thereby affecting the normal breathing of the worker. The second injection molded piece 62 protrudes a positioning ring part 621 to the side of the first injection molded piece 61, and the first injection molded piece 61 is sleeved outside the positioning ring part 621. It should be noted that the two-color injection molding process combines two different plastic materials together through two injection processes to form a plastic product with two colors or two different material properties. In this application, two kinds of plastic with different hardness are used for injection molding, so that the first injection molded piece 61 and the second injection molded piece 62 are tightly connected together, and the second injection molded piece 62 is softer, which is conducive to being connected to the face shield 10 of the ventilation gas mask by high-frequency welding.

[0045] In an alternative embodiment, the first injection molded piece 61 comprises a gas inlet pipe part 612 and a support pipe part 611 connected together. The gas inlet pipe part 612 and the support pipe part 611 respectively form a first gas inlet channel 6121 and a second gas inlet channel 6111 connected together inside, the end of the support pipe part 611 is sleeved outside the positioning ring part 621, and the end of the gas inlet pipe part 612 has a first gas inlet port 61a. The second injection molded piece 62 comprises a connecting pipe part 622 and a gas outlet pipe part 623, the positioning ring part 621 is arranged at one end of the connecting pipe part 622 facing the support pipe part 611, the gas outlet pipe part 623 is connected to the circumferential surface of the connecting pipe part 622, and the gas outlet pipe part 623 has a second gas outlet channel 6231 inside, the connecting pipe part 622 has a first gas outlet channel 6221 inside, the end of the connecting pipe part 622 away from the support pipe part has a first gas outlet port 61b, and the end of the gas outlet pipe part 623 has a second gas outlet port 61c.

[0046] Specifically, in the embodiment, the first injection-molded part 61 comprises an air inlet pipe portion 612 and a support pipe portion 611, the diameter of the air inlet pipe portion 612 is smaller than the diameter of the support pipe portion 611. A first air inlet passage 6121 is formed in the air inlet pipe portion 612, a second air inlet passage 6111 is formed in the support pipe portion 611, and the first air inlet passage 6121 and the second air inlet passage 6111 are in communication with each other. The end of the support pipe portion 611 is sleeved outside the positioning ring portion 621, and the end of the air inlet pipe portion 612 is provided with a first air inlet port 61a. The air guide pipe 20 of the ventilation air mask is mounted outside the air inlet pipe portion 612 to deliver air into the first air inlet passage 6121 and the second air inlet passage 6111 through the first air inlet port 61a.

[0047] The second injection-molded part 62 comprises a connecting pipe portion and an air outlet pipe portion, the positioning ring portion 621 is arranged on the connecting pipe portion 622 and extends from the end surface of the connecting pipe portion 622 to the first injection-molded part 61. The air outlet pipe portion is integrally connected to the circumferential surface of the connecting pipe portion, a second air outlet passage 6231 is formed in the air outlet pipe portion, and a first air outlet passage 6221 is formed in the connecting pipe portion 622. The end of the connecting pipe portion 622 away from the support pipe portion is provided with a first air outlet port 61b, and the end of the air outlet pipe portion 623 is provided with a second air outlet port 61c. The air outlet pipe portion 623 is connected to the alarm 70 through a connecting pipe, and the alarm 70 is arranged in the mask 10 of the ventilation air mask to be directly observed by the operator to confirm whether the air pressure delivered from outside is sufficient. As shown in Figure 5 and Figure 6 As shown in the drawings, one end of the air guide pipe 20 is connected to the first air inlet port 61a on the first injection-molded part 61, and then air is delivered into the mask 10 through the first air outlet port 61b and into the alarm 70 through the second air outlet port 61c through a three-way connecting pipe. The alarm 70 is used to monitor whether the delivered air pressure is sufficient, and if the pressure is insufficient, a red light will be displayed to remind the operator to immediately move away from the position.

[0048] In an alternative embodiment, the second injection-molded part 62 further comprises a welding ring portion 624 connected to the end of the connecting pipe portion 622 away from the first injection-molded part 61. In this embodiment, the end of the connecting pipe portion 622 of the second injection-molded part 62 away from the first injection-molded part 61 is further provided with a welding ring portion 624, and the welding ring portion 624 is welded to the mask 10 of the ventilation air mask.

[0049] In an alternative embodiment, the thickness of the welding ring portion 624 is smaller than the thickness of the connecting pipe portion 622. In order to increase the adaptability of the welding ring portion 624 to the mask 10, the thickness of the welding ring portion 624 is set to be smaller than the thickness of the connecting pipe portion 622. The thickness of the welding ring portion 624 is slightly larger than the thickness of the mask 10.

[0050] In an alternative embodiment, a reinforcing portion 625 is filled between the air outlet pipe portion 623 and the welding ring portion 624. The air outlet pipe portion 623 is used to connect the communication pipe 80. The communication pipe 80 is sleeved on the air outlet pipe portion 623, and is integrally welded to the air outlet pipe portion 623 by high-frequency welding. Since the air outlet pipe portion 623 needs to connect the communication pipe 80, the strength of the air outlet pipe portion 623 needs to be appropriately improved to reduce the probability of bending of the communication pipe 80 at the position of the air outlet pipe portion 623, so as to ensure that air can smoothly enter the communication pipe 80 through the air outlet pipe portion 623 and flow into the alarm 70.

[0051] In an alternative embodiment, the welding ring portion 624 has a plurality of groove portions towards the surface of the first injection molding member 61. The surface of the welding ring portion 624 towards the first injection molding member 61 is a welding surface, and the plurality of groove portions provided on the surface can increase the contact area between the welding ring portion 624 and the face shield 10, thereby increasing the firmness of the welding.

[0052] In an alternative embodiment, the end of the support pipe portion 611 away from the second injection molding member 62 is rounded. The support pipe portion 611 is used to support and maintain the deformation, and by rounding the end of the support pipe portion 611 away from the second injection molding member 62, the stress concentration can be reduced, thereby further reducing the probability of deformation of the support pipe portion 611, so as to ensure that the worker can breathe in sufficient air.

[0053] In an alternative embodiment, the circumferential wall of the air inlet pipe portion 612 has at least two tapered convex wall rings 6122. The air inlet pipe portion 612 is used to connect the air guide pipe 20, and the air guide pipe 20 is directly sleeved on the circumferential wall of the air inlet pipe portion 612 during installation, so that the air guide pipe 20 and the air inlet pipe portion 612 can be connected. The present application provides at least two tapered convex wall rings 6122 on the circumferential wall of the air inlet pipe portion 612 to increase the tightness of the sleeve connection between the air guide pipe 20 and the air inlet pipe portion 612.

[0054] In an alternative embodiment, the alarm 70 comprises a housing 71, a warning member 72 and an elastic member 73. The housing 71 has an accommodating cavity inside, the lower end of the housing 71 has a second air inlet 71a for air inlet, and the warning member 72 is movably arranged in the accommodating cavity. The elastic member 73 is arranged in the accommodating cavity, and one end of the elastic member 73 abuts against the warning member 72, and the other end of the elastic member 73 abuts against the end of the housing 71 away from the second air inlet 71a. The lower end of the housing 71 has a transparent area, and the warning member 72 is used to move in the accommodating cavity under the action of the air inlet pressure, so as to move into the transparent area or move out of the transparent area for the user to view.

[0055] Specifically, the alarm 70 of the present application is arranged inside the face mask of the ventilation face mask for the user to observe in the contaminated site. The inside of the shell 71 has a receiving cavity for receiving the warning member 72, the warning member 72 is arranged in the receiving cavity, and one end of the elastic member 73 abuts against the warning member 72 and the other end abuts against the bottom wall of the upper end of the receiving cavity. The lower end of the shell 71 has a second air inlet 71a which is communicated with the receiving cavity so that the gas from the outside can enter the receiving cavity and contact the warning member 72 to drive the warning member 72 to move in the receiving cavity.

[0056] In use, the external air pipe is connected to the second air inlet 71a of the lower end of the shell 71 through the connecting pipe to send the air for the user to breathe to the alarm 70, under the action of the gas pressure, the warning member 72 compresses the elastic member 73 so that the warning member 72 moves to the outside of the transparent region, at this time, the user observes the position of the transparent member and cannot observe the warning member 72, which indicates that the pressure of the gas from the outside is sufficient and indicates that the air for the worker to breathe can be provided, at this time, the worker can have sufficient air to breathe. Or the gas from the outside is insufficient, at this time, the elasticity of the elastic member 73 is greater than the gas pressure, so the elastic member 73 will push the warning member 72 to the transparent region, the user can directly observe the warning member 72 through the transparent region, at this time, the worker needs to immediately leave the contaminated environment to prevent the insufficient air supply from bringing danger to the worker.

[0057] It should be noted that the warning member 72 has a bright color so as to be distinguished from the transparent member, and the worker can confirm whether the air supply is sufficient at a glance. In some optional embodiments, the warning member 72 is red to facilitate the prompt of the worker.

[0058] In an optional embodiment, the shell 71 includes a lower cylinder 711 and an upper cylinder 712, the lower cylinder 711 and the upper cylinder 712 are assembled to form the receiving cavity. The inner wall of the upper cylinder 712 has an internal thread, a part of the lower cylinder 711 extends into the upper cylinder 712, and the part extending into the upper cylinder 712 has an external thread matched with the internal thread.

[0059] Specifically, the shell 71 is assembled by a lower cylinder 711 and an upper cylinder 712, the upper cylinder 712 is sleeved on a part of the upper end of the lower cylinder 711, so that the other part of the lower cylinder 711 is exposed to the outside. The upper cylinder 712 and the lower cylinder 711 are fixed by internal threads and external threads. The upper cylinder 712 is an opaque piece, and a transparent area is arranged on the lower cylinder 711. When the upper cylinder 712 is assembled with the lower cylinder 711, a part of the lower cylinder 711 is located outside the upper cylinder 712, so that the transparent area on the lower cylinder 711 can be exposed to the outside to be observed by the operator. In an optional embodiment, the lower cylinder 711 is a transparent piece made of transparent material. Integrating the lower cylinder 711 as a transparent piece can reduce the structure of the separately arranged transparent area, and further simplify the structure of the lower cylinder 711. In use, the part of the lower cylinder 711 not inserted into the upper cylinder 712 can be directly observed by the operator.

[0060] The inside of the lower cylinder 711 has a first cylindrical cavity 7111, and the warning piece 72 is arranged in the first cylindrical cavity 7111. The inside of the upper cylinder 712 has a second cylindrical cavity 7121, which is a stepped cavity. The second cylindrical cavity 7121 includes a third cylindrical cavity 7121a and a fourth cylindrical cavity 7121b. The diameter of the third cylindrical cavity 7121a is greater than that of the fourth cylindrical cavity 7121b, and the inner diameter of the third cylindrical cavity 7121a is matched with the outer diameter of the upper cylinder 712. The upper end of the lower cylinder 711 extends into the third cylindrical cavity 7121a. One end of the elastic piece 73 abuts against the warning piece 72, and the other end abuts against the bottom wall of the fourth cylindrical cavity 7121b to apply a downward elastic force to the warning piece 72. The gas entering from the second gas inlet 71a at the lower end of the lower cylinder 711 applies an upward pressure to the warning piece 72. When the pressure is sufficient, the pressure of the gas is greater than the elastic force of the warning piece 72 and the gravity of the warning piece 72, so that the warning piece 72 moves to the upper end to move into the upper cylinder 712. Since the upper cylinder 712 is an opaque piece, the operator can only see the transparent lower cylinder 711. When the gas pressure is insufficient, the elastic force of the elastic piece 73 is greater than the pressure of the gas, so that the warning piece 72 moves to one side of the lower cylinder 711 to be exposed to the lower cylinder 711 to prompt the operator that the gas pressure is insufficient.

[0061] The second gas inlet 71a is arranged at the end of the lower cylinder 711 away from the upper cylinder 712, i.e. the second gas inlet 71a is arranged at the lower end of the lower cylinder 711. The end of the upper cylinder 712 away from the lower cylinder 711 is provided with a gas passage 712a, i.e. the upper end of the upper cylinder 712 is provided with the gas passage 712a. The gas passage 712a is used to communicate the accommodation cavity with the outside, so that the warning piece 72 can move in the accommodation cavity.

[0062] In an alternative embodiment, the warning member 72 comprises a main body portion 721, a sealing ring portion 722 and a connecting portion 723. The main body portion 721 extends along the axial direction of the lower cylinder 711, the sealing ring portion 722 is arranged on the circumference of the main body portion 721 and tightly abuts against the first cylindrical cavity 7111. The connecting portion 723 is arranged at one end of the main body portion 721 close to the elastic member 73 and is used to connect the elastic member 73.

[0063] Specifically, the warning member 72 comprises a main body portion 721, a sealing ring portion 722 and a connecting portion 723. The length direction of the main body portion 721 is the axial direction of the lower cylinder 711. The sealing ring portion 722 is arranged outside the main body portion 721 and on the circumference of the main body portion 721 to tightly abut against the first cylindrical cavity 7111 in the lower cylinder 711, so as to ensure the sealing performance between the warning member 72 and the inner wall of the first cylindrical cavity 7111. The connecting portion 723 is arranged at the upper end of the main body portion 721 and is used to connect the elastic member 73.

[0064] In an alternative embodiment, the number of the sealing ring portions 722 is at least two. The elastic member 73 is a spring, one end of which abuts against the bottom wall of the upper cylinder 712 and the other end of which is sleeved on the connecting portion 723.

[0065] Specifically, in this embodiment, the number of the sealing ring portions 722 is three, and the three sealing ring portions 722 are arranged at the two ends and the middle portion of the main body portion 721. Due to the manufacturing tolerance, a plurality of sealing ring portions 722 are arranged to compensate for the manufacturing tolerance, so as to ensure the sealing performance between the sealing ring portions 722 and the inner wall of the first cylindrical cavity 7111. The elastic member 73 is a spring, which is arranged in the upper cylinder 712 and has its lower end sleeved on the connecting portion 723 and its other end abutting against the bottom wall of the fourth cylindrical cavity 7121b of the upper cylinder 712.

[0066] In an alternative embodiment, the ventilation gas mask further comprises a waistband 90, and the air regulating valve 30 is mounted on the waistband 90. When the user uses the ventilation gas mask of the present application, the air guide pipe 20 needs to be fixed. Therefore, the air regulating valve 30 is fixed on the waistband 90 to fix the air regulating valve 30, so as to facilitate the movement of the user and normal operation.

[0067] In an alternative embodiment, the headgear portion 11 comprises a window strip 113 extending from the front surface to the two side surfaces of the headgear portion 11, so as to increase the visual angle of the user.

[0068] Specifically, the headgear part 11 is a square tube structure, which includes a front surface, a back surface, a left surface and a right surface. The front surface is the side facing the user's face, and the user can observe the external environment through the window strip 113 of the front surface. The window on the market is only provided on the front surface. At this time, the visual angle of the operator is small, and it is not convenient for the operator to work. The window strip 113 of the present application extends from the front surface of the headgear part 11 to the left side and the right side to form a U-shaped window strip 113. The window strip 113 includes a front window and two side windows, and the operator can observe the outside world through the front window and the side window, which greatly improves the user's visual angle and facilitates the operator to work in a polluted environment. It should be noted that the window strip 113 is made of PVC material, and the hardness of the window strip 113 is higher than that of other positions. Since the window strip 113 is for the user's line of sight to pass through, the material requirement of the window strip 113 is much higher than that of other positions.

[0069] In an optional embodiment, a plurality of magic tapes 15 and instrument windows 17 are further provided on the surrounding edge part 13. The surrounding edge part 13 is used to fix two ventilation gas masks. The present application is provided with a magic tape 15 at each corner of the surrounding edge part 13, which is attached to the magic tape 15 on the user's clothes, so as to fix the ventilation gas mask of the present application, so as to ensure that the user can breathe normally. The instrument window 17 is used for the operator to observe the related instruments.

[0070] In an optional embodiment, the air regulating valve 30 includes a valve body 31 and a quick male joint 32, the valve body 31 has an air outlet pipe connected to the air guide pipe 20, and the quick male joint 32 is used to connect an external quick female joint. The present application matches the external quick female joint through the quick male joint 32, so as to realize quick plugging and unplugging, thereby facilitating the user to use.

[0071] In an optional embodiment, the mask 10 further includes a tear strip 16 part, which is integrally provided on the headgear part 11. The tear strip 16 is used by the user in an emergency situation, so that the user can tear it to breathe. For example, there is no air supply outside, at this time the user needs to breathe even in a harsh environment, at this time the user can tear off the tear strip 16, so that the headgear part 11 is torn open, so that the user can breathe.

[0072] The above-mentioned is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the contents of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A ventilated face mask, characterized in that, include: A face mask is used to cover the head of a person. An air duct, connected to the inside of the mask, is used to supply air to the inside of the mask; An air regulating valve is installed at the end of the air guide pipe; The first exhaust valve is provided on the mask and is used to exhaust air from the inside of the mask to the outside in one direction. The mask includes a head cover, a neck warmer, and a side panel. The head cover has an opening with a cavity for the head to pass through, and the cavity is used to accommodate the head. The neck warmer is installed on the inner wall of the head cover and is positioned close to the opening. The neck warmer and the inner wall of the head cover form an annular ventilation cavity, which is used to tightly surround the neck to seal the neck from the opening of the mask. The side panel is connected to the opening of the head cover. A second exhaust valve is provided on the neck warmer, which allows air to exit unidirectionally from the ventilation cavity into the head cover. An air guide tube is connected to the ventilation cavity to supply air into it.

2. The ventilated face mask as described in claim 1, characterized in that, The ventilated face mask also includes a connecting member, which is disposed on the face mask and is used to connect the air duct and the ventilation chamber.

3. The ventilated face mask as described in claim 2, characterized in that, The connecting component is a three-way connector, which includes an air inlet, a first air outlet, and a second air outlet. The first air outlet is connected to the ventilation chamber. The ventilated face mask also includes an alarm and a connecting pipe. One end of the connecting pipe is connected to the second air outlet, and the other end is connected to the alarm. The alarm is installed inside the headgear.

4. The ventilated face mask as described in claim 1, characterized in that, There are two second exhaust valves.

5. The ventilated face mask as described in claim 1, characterized in that, The ventilated face mask also includes a waist belt, and the air regulating valve is installed on the waist belt.

6. The ventilated face mask as described in claim 1, characterized in that, The headgear includes a viewing window strip that extends from the front surface of the headgear to the sides to increase the user's viewing angle.

7. The ventilated face mask as described in claim 1, characterized in that, The edge is also equipped with multiple Velcro straps.

8. The ventilated face mask as described in claim 1, characterized in that, The gas regulating valve includes a valve body and a quick-connect male connector. The valve body has a gas outlet pipe, which is connected to the gas guide pipe. The quick-connect male connector is used to connect to an external quick-connect female connector.

9. The ventilated face mask as described in claim 1, characterized in that, The mask also includes a tear strip, which is integrally formed on the headgear.

10. The ventilated face mask as claimed in claim 1, characterized in that, The surrounding area also has an instrument window.

Images