CN213313020U - Mask with air bypass valve - Google Patents

Abstract

The utility model discloses a take face guard of air bypass valve includes: face mirror, apron plate, shell, overhead area and air bypass valve, air bypass valve includes: the device comprises a small spring, a change-over switch, a spiral rotating body, a valve body, a fixing clamping piece, a diaphragm seat, a large spring, a diaphragm and a connecting rod; the spiral rotating body is convexly arranged in the groove of the change-over switch, the small spring is arranged between the change-over switch and the spiral rotating body, the outer circumference of the valve body is arranged in the inner cavity of the change-over switch, the fixing clamping piece is sequentially inserted into the change-over switch, the annular groove of the valve body and the fixing hole of the change-over switch through the fixing groove of the change-over switch, the spiral rotating body is arranged in the inner cavity of the valve body, the baffle plate of the spiral rotating body extends out from the lower end of the valve body, and the; the diaphragm on the diaphragm seat is clamped on the first boss of the connecting rod, the second boss of the connecting rod is clamped on the baffle of the spiral rotating body, a large spring is arranged between the valve body and the diaphragm seat, and the diaphragm is hermetically covered on the air outlet of the shell.

Description

Mask with air bypass valve

Technical Field

The utility model relates to a take protecting mask of air bypass valve.

Background

The positive pressure fire-fighting air respirator (self-contained breathing) is a self-supply open type fire-fighting air respirator, which is mainly suitable for places of fire fighting, chemical engineering, ships, petroleum, smelting, factories, mines, laboratories and the like, and enables firemen or rescue and rescue personnel to safely carry out fire extinguishing, rescue and relief work and rescue work in severe environments filled with dense smoke, toxic gas, steam or oxygen deficiency.

Protective masks generally fall into the categories of positive pressure air respirator masks and filtering gas masks.

1. Positive pressure air respirator mask: as a personal protection device, the mask provides effective protection for respiratory organs, eyes and facial skin of people, is an important component of personal safety protection, and is an important part for isolating the face of the people from external polluted and contaminated air.

2. Filtering gas mask: the face mask is composed of a face mask, an air duct and a canister, and the face mask can be directly connected with the canister for use or connected with the canister for use by the air duct. The filtering gas mask can be applied to chemical industry, warehouses, scientific research and various toxic and harmful operating environments by respectively selecting various types of gas filtering tanks according to protection requirements.

The air inlet modes of the two types of protective masks are different, but the principle of the air outlet mode is the same. Near the nose and mouth of the mask, there is an air outlet valve body device with a spring and a rubber diaphragm, which ensures that the outside air can not enter the mask from the device; when the exhaust gas pressure exhaled from the inside of the face mask is larger than a certain pressure value, the air outlet valve is automatically jacked open by the exhaust gas pressure, and the valve is automatically closed after the exhaust gas is exhausted. The air outlet valve can automatically exhaust once when a user exhales an exhaust gas, and the air is provided by the air bottle or the canister when the user inhales the exhaust gas.

Disclosure of Invention

The utility model aims to overcome the problem that the air outlet valve of the existing mask can only be used for air outlet, and provides a protective mask with an air bypass function.

The utility model discloses a take face guard of air bypass valve, it includes: face mirror, apron plate, shell, overhead area and air bypass valve, the shell casing is overhead at the person of wearing, is equipped with the face mirror at the front end of shell, is equipped with the apron plate in the upper end of face mirror, and the both ends in overhead area are adorned respectively on the shell at both ends about the apron plate, and the air supply opening is on the shell of face mirror lower extreme, and the air bypass valve is adorned on the shell of face mirror lower extreme, wherein: the air bypass valve includes: the device comprises a small spring, a change-over switch, a spiral rotating body, a valve body, a fixing clamping piece, a diaphragm seat, a large spring, a diaphragm and a connecting rod; the change-over switch is a sleeve with one closed end, an inner cavity is arranged in the change-over switch, at least two grooves are arranged at the closed end of the change-over switch along the circumferential direction of the closed end of the change-over switch, a first handle and a second handle are respectively arranged at two sides of the outer circumference of the change-over switch, a fixed groove is arranged on the outer circumference of the change-over switch, two holes communicated with the inner cavity are arranged at two ends of the fixed groove, and two fixed holes are arranged on the outer circumference of the change-over switch corresponding; the spiral rotating body is a sleeve, the outer side of the upper end of the spiral rotating body is provided with at least two bulges along the circumference, the lower end of the spiral rotating body is provided with a protruded baffle plate, the lower ends of the baffle plate and the spiral rotating body are provided with connecting rod holes, the outer circumference of the spiral rotating body is provided with at least two spiral slideways, each spiral slideway is arranged along the longitudinal length direction of the spiral rotating body, the bottom end of each spiral slideway is provided with a low point groove, the bulges are arranged in the grooves of the change-over switch, and the small springs are arranged between the change-over switch and the spiral rotating body; the valve body is a sleeve, at least two convex keys are arranged on the circumference of the inner cavity of the valve body, a first fixed station and a second fixed station are respectively arranged on two sides of the valve body, the first fixed station and the second fixed station are fixed on the shell, an annular groove surrounding the circumference of the valve body is arranged on the outer circumference of the valve body, the outer circumference of the valve body is arranged in the inner cavity of the change-over switch, the fixing clamping piece is sequentially inserted into the change-over switch, the annular groove of the valve body and the fixing hole of the change-over switch through the fixing groove of the change-over switch, the spiral rotating body is arranged in the inner cavity of the valve body, the baffle extends out from the lower end of; the diaphragm is installed on the diaphragm seat, there are second boss and the first boss of a section distance apart from the top down in the length direction of connecting rod, the diaphragm card of dress on the diaphragm seat is on first boss, the second boss card is on the baffle of spiral rotator, the connecting rod stretches into in the spiral rotator, be equipped with big spring between valve body and diaphragm seat, the diaphragm covers on the gas outlet of shell hermetically, rotatory change over switch, spiral rotator drives the connecting rod, diaphragm seat and diaphragm are close to the valve body direction, make and have a clearance between the gas outlet of diaphragm and shell, the person of wearing breathes external air from this clearance department.

The utility model discloses a take face guard of air bypass valve, wherein: a large spring fixing groove is formed in the circumference of the lower end of the valve body, and the upper end of the large spring is arranged in the large spring fixing groove; a convex spring fixing table is arranged in the center of the closed end of the change-over switch, and one end of a small spring is sleeved on the spring fixing table.

The utility model discloses a take face guard of air bypass valve, wherein: the lower end of the first handle or the second handle is provided with a position sensor.

The utility model discloses a take face guard of air bypass valve, wherein: the change-over switch, the spiral rotary body and the valve body are respectively cast integrally.

The utility model discloses a take face guard of air bypass valve, wherein: the fixed clamping piece is a U-shaped steel wire.

The utility model discloses a take face guard of air bypass valve, wherein: the connecting rod is a steel rod.

The utility model discloses a take face guard of air bypass valve, wherein: one end of the diaphragm is attached to the diaphragm seat, the other end of the diaphragm is clamped on the diaphragm seat, and the area of the diaphragm is larger than that of the diaphragm seat.

The utility model discloses a take face guard of air bypass valve, wherein: the first fixing table and/or the second fixing table of the valve body extend downwards to be close to the diaphragm.

The utility model discloses a take face guard of air bypass valve, before the person of wearing gets into the dangerous environment that should not breathe or after leaving this type of environment, in this section does not have dangerous time, can use the communicating air bypass valve with external environment, for the person of wearing of protective face mask provides the ambient air that suitable breathing to reduce the air consumption of gas cylinder or reduce canister's live time.

Drawings

FIG. 1 is a schematic perspective view of a mask with an air bypass valve according to the present invention;

FIG. 2 is a schematic cross-sectional view of the air bypass valve of FIG. 1;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic cross-sectional view of the switch of FIG. 2;

FIG. 5 is a bottom schematic view of FIG. 4;

FIG. 6 is a schematic diagram of the diverter switch of FIG. 2 in a forward direction;

FIG. 7 is a reverse schematic view of the diverter switch of FIG. 2;

FIG. 8 is a top view of the helical rotator of FIG. 2;

FIG. 9 is a schematic cross-sectional view of the spiral rotary body of FIG. 2 in a forward direction;

FIG. 10 is a schematic forward view of the helical rotator of FIG. 2;

FIG. 11 is a top down schematic view of the valve body of FIG. 2;

FIG. 12 is a schematic view in cross-section taken in the forward direction A-A of the valve body of FIG. 11;

fig. 13 is a top view of the fixing clip of fig. 2.

In fig. 1 to 13, reference numeral 1 is a small spring; reference numeral 2 is a changeover switch; reference numeral 3 is a helical rotary body; the reference numeral 4 is a valve body; the number 5 is a fixing clip; reference numeral 6 is a diaphragm seat; reference numeral 7 is a large spring; reference numeral 8 denotes a diaphragm; reference numeral 9 is a connecting rod; reference numeral 10 is a first boss; reference numeral 11 is a second boss; reference numeral 12 is a mirror; reference numeral 13 is a front guard plate; reference numeral 14 is a housing; reference numeral 15 is a head band; reference numeral 16 is an air feed port; reference numeral 17 is an air bypass valve; reference numeral 21 is a groove; reference numeral 22 is a spring fixing table; reference numeral 23 is an inner cavity; reference numeral 24 is a first handle; reference numeral 25 is a second handle; reference numeral 26 is a fixing groove; reference numeral 27 is a fixing hole; reference numeral 28 is a position sensor; numeral 31 is a projection; numeral 32 is a spiral chute; reference numeral 33 is a low point groove; reference numeral 34 is a baffle plate; reference numeral 35 is a connecting rod hole; reference numeral 41 is a convex key; reference numeral 42 is an annular groove; reference numeral 43 is a first fixed stage; reference numeral 44 is a second fixed stage; reference numeral 45 denotes a large spring fixing groove.

Detailed Description

As shown in figure 1, the mask with the air bypass valve of the utility model comprises: a mirror 12, a front guard 13, a housing 14, a head top belt 15 and an air bypass valve 17, wherein the housing 14 covers the head of the wearer, the mirror 12 is mounted on the front end of the housing 14, the front guard 13 is mounted on the upper end of the mirror 12, both ends of the head top belt 15 are respectively mounted on the housing 14 on the left and right ends of the front guard 13, an air supply opening 16 is opened on the housing 14 on the lower end of the mirror 12, and the air bypass valve 17 is mounted on the housing 14 on the lower end of the mirror 12.

As shown in fig. 2 to 7 and 13, the air bypass valve 17 includes: the device comprises a small spring 1, a change-over switch 2, a spiral rotary body 3, a valve body 4, a fixed clamping piece 5, a diaphragm seat 6, a large spring 7, a diaphragm 8 and a connecting rod 9; the switch 2 is a sleeve with one closed end, an inner cavity 23 is arranged in the switch 2, three grooves 21 are arranged at the closed end of the switch 2 along the circumferential direction, a convex spring fixing table 22 is arranged at the center of the closed end of the switch 2, a first handle 24 and a second handle 25 are respectively arranged at two sides of the outer circumference of the switch 2, a position sensor 28 is arranged at the lower end of the first handle 24 or the second handle 25, a fixing groove 26 is arranged on the outer circumference of the switch 2, two holes leading into the inner cavity 23 are arranged at two ends of the fixing groove 26, and two fixing holes 27 are arranged on the outer circumference of the switch 2 corresponding to the fixing groove 26.

As shown in fig. 2, 8 to 10, the spiral rotary body 3 is a sleeve, three protrusions 31 are formed on the outer side of the upper end of the spiral rotary body 3 along the circumference thereof, a protruding baffle 34 is formed on the lower end of the spiral rotary body 3, a connecting rod hole 35 is formed on the baffle 34 and the lower end of the spiral rotary body 3, three spiral slideways 32 are formed on the outer circumference of the spiral rotary body 3, each spiral slideway 32 is arranged along the longitudinal length direction of the spiral rotary body 3, a low point groove 33 is formed at the bottom end of each spiral slideway 32, the protrusions 31 are fitted in the grooves 21 of the switch 2, and the small spring 1 is fitted over the spring fixing table 22 and fitted between the switch 2 and the spiral rotary body 3.

As shown in fig. 2, 11 and 12, the valve body 4 is a sleeve, three convex keys 41 are arranged on the circumference of the inner cavity of the valve body 4, a first fixing platform 43 and a second fixing platform 44 are respectively arranged on two sides of the valve body 4, the first fixing platform 43 and the second fixing platform 44 are fixed on the shell 14, and the first fixing platform 43 and/or the second fixing platform 44 extend downwards to be close to the diaphragm 8. An annular groove 42 is formed around the circumference of the valve body 4 on the outer circumference thereof, and a large spring fixing groove 45 is formed on the circumference of the lower end of the valve body 4.

As shown in fig. 2, the outer circumference of the valve body 4 is installed in the inner cavity 23 of the switch 2, the fixing clip 5 is inserted into the switch 2, the annular groove 42 of the valve body 4 and the fixing hole 27 of the switch 2 in sequence through the fixing groove 26 of the switch 2, the spiral rotary body 3 is installed in the inner cavity of the valve body 4, the baffle 34 extends from the lower end of the valve body 4, and the convex key 41 of the valve body 4 is matched with the spiral slideway 32 of the spiral rotary body 3; diaphragm 8 dress is on diaphragm seat 6, there are second boss 11 and the first boss 10 of a distance apart from one section distance from the top down at the length direction from the top of connecting rod 9, the diaphragm 8 card of dress on diaphragm seat 6 is on first boss 10, second boss 11 card is on helical rotary body 3's baffle 34, connecting rod 9 stretches into helical rotary body 3 in, it has big spring fixed slot 45 to open on the circumference of valve body 4 lower extreme, be equipped with big spring 7 between the big spring fixed slot 45 of valve body 4 and diaphragm seat 6 in, the one end laminating of diaphragm 8 is on diaphragm seat 6, the other end card is on diaphragm seat 6, diaphragm 8 area is greater than diaphragm seat 6 area, diaphragm 8 covers on the gas outlet of shell 14 sealedly.

The selector switch 2, the spiral rotary body 3 and the valve body 4 are integrally molded. The fixing clamping piece 5 is a U-shaped steel wire. The connecting rod 9 is a steel rod.

When the wearer breathes out, the air pressure in the mask pushes the diaphragm 8 open to discharge the waste gas in the mask. When a wearer enters a safe area, the wearer rotates the change-over switch 2 arranged on the mask, the change-over switch 2 drives the spiral rotating body 3 to rotate, the convex key 41 of the valve body 4 slides on the spiral slideway 32, the bottom of the convex key 41 is positioned at the low point groove 33 and is clamped, under the condition that the valve body 4 is fixed, the baffle 34 of the spiral rotating body 3 drives the connecting rod 9, the diaphragm seat 6 and the diaphragm 8 to approach towards the valve body 4, so that a gap is formed between the diaphragm 8 and the air outlet of the shell 14, and the wearer breathes outside air from the gap; when the dangerous area is entered again, the switch 2 is rotated reversely, the air bypass valve 17 is closed, and the diaphragm 8 seals the air outlet hole of the mask again by means of the small spring 1 and the large spring 7.

The above is only the examples of the present invention, and not therefore the scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, all of which are included in the same way in the protection scope of the present invention.

Claims (8)

1. A mask with an air bypass valve, comprising: face mirror (12), apron (13), shell (14), overhead area (15) and air bypass valve (17), shell (14) cover is overhead at the wearer, face mirror (12) are equipped with to the front end of shell (14), apron (13) are equipped with to the upper end of face mirror (12), the both ends of overhead area (15) are adorned respectively on apron (13) shell (14) of controlling both ends, air supply opening (16) are opened on shell (14) of face mirror (12) lower extreme, air bypass valve (17) are adorned on shell (14) of face mirror (12) lower extreme, its characterized in that: the air bypass valve (17) includes: the device comprises a small spring (1), a change-over switch (2), a spiral rotating body (3), a valve body (4), a fixed clamping piece (5), a diaphragm seat (6), a large spring (7), a diaphragm (8) and a connecting rod (9); the switch (2) is a sleeve with a closed end, an inner cavity (23) is arranged in the switch (2), at least two grooves (21) are formed in the closed end of the switch (2) along the circumferential direction of the closed end, a first handle (24) and a second handle (25) are respectively arranged on two sides of the outer circumference of the switch (2), a fixed groove (26) is formed in the outer circumference of the switch (2), two holes communicated with the inner cavity (23) are formed in two ends of the fixed groove (26), and two fixed holes (27) are formed in the outer circumference of the switch (2) corresponding to the fixed groove (26); the spiral rotating body (3) is a sleeve, at least two bulges (31) are arranged on the outer side of the upper end of the spiral rotating body (3) along the circumference of the spiral rotating body, a protruding baffle plate (34) is arranged at the lower end of the spiral rotating body (3), a connecting rod hole (35) is formed at the lower ends of the baffle plate (34) and the spiral rotating body (3), at least two spiral slideways (32) are arranged on the outer circumference of the spiral rotating body (3), each spiral slideway (32) is arranged along the longitudinal length direction of the spiral rotating body (3), a low-point groove (33) is formed at the bottom end of each spiral slideway (32), the bulges (31) are arranged in grooves (21) of the change-over switch (2), and the small spring (1) is arranged between the change-over switch (2) and the spiral rotating; the valve body (4) is a sleeve, at least two convex keys (41) are arranged on the circumference of the inner cavity of the valve body (4), a first fixed platform (43) and a second fixed platform (44) are respectively arranged at two sides of the valve body (4), the first fixed platform (43) and the second fixed platform (44) are fixed on the shell (14), an annular groove (42) is arranged on the outer circumference of the valve body (4) around the circumference thereof, the outer circumference of the valve body (4) is arranged in the inner cavity (23) of the switch (2), the fixed clamping piece (5) is inserted into the switch (2), the annular groove (42) of the valve body (4) and the fixed hole (27) of the switch (2) in sequence through the fixed groove (26) of the switch (2), the spiral rotating body (3) is arranged in the inner cavity of the valve body (4), the baffle (34) extends out of the lower end of the valve body (4), and the convex key (41) of the valve body (4) is matched with the spiral slideway (32) of the spiral rotating body (3); the diaphragm (8) is arranged on the diaphragm seat (6), a second boss (11) and a first boss (10) which are separated by a certain distance are arranged from top to bottom in the length direction of the connecting rod (9), the diaphragm (8) arranged on the diaphragm seat (6) is clamped on the first boss (10), the second boss (11) is clamped on a baffle plate (34) of the spiral rotating body (3), the connecting rod (9) extends into the spiral rotating body (3), a big spring (7) is arranged between the valve body (4) and the diaphragm seat (6), the diaphragm (8) is hermetically covered on the air outlet of the shell (14), the change-over switch (2) is rotated, the spiral rotating body (3) drives the connecting rod (9), the diaphragm seat (6) and the diaphragm (8) to approach to the valve body (4), so that a gap is formed between the diaphragm (8) and the air outlet of the housing (14), and the wearer breathes the outside air from the gap.

2. A mask with an air bypass valve as defined in claim 1, wherein: a large spring fixing groove (45) is formed in the circumference of the lower end of the valve body (4), and the upper end of the large spring (7) is arranged in the large spring fixing groove (45); a convex spring fixing table (22) is arranged in the center of the closed end of the change-over switch (2), and one end of the small spring (1) is sleeved on the spring fixing table (22).

3. A mask with an air bypass valve as defined in claim 2 wherein: a position sensor (28) is mounted at the lower end of the first handle (24) or the second handle (25).

4. A mask with an air bypass valve as defined in claim 3, wherein: the change-over switch (2), the spiral rotary body (3) and the valve body (4) are respectively formed by integral casting.

5. A mask with an air bypass valve as defined in claim 4, wherein: the fixing clamping piece (5) is a U-shaped steel wire.

6. A mask with an air bypass valve as defined in claim 5, wherein: the connecting rod (9) is a steel rod.

7. A mask with an air bypass valve as defined in claim 6, wherein: one end of the diaphragm (8) is attached to the diaphragm seat (6), the other end of the diaphragm is clamped on the diaphragm seat (6), and the area of the diaphragm (8) is larger than that of the diaphragm seat (6).

8. A mask with an air bypass valve as defined in claim 7, wherein: the first fixing platform (43) and/or the second fixing platform (44) of the valve body (4) extend downwards to be close to the diaphragm (8).

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