Backpack type positive pressure respirator with standby gas circuit

Abstract

The utility model relates to the technical field of respiratory protection, in particular to a knapsack positive pressure respirator with a standby gas circuit, which comprises a gas cylinder and further comprises a gas circuit component, a gas circuit component, a gas supply component, a gas supply component, a gas supply component, a gas supply component and a back-up gas circuit component, and the gas circuit component is arranged at the bottom of the gas cylinder and consists of a main gas circuit and the standby gas circuit; the mask is connected with the gas cylinder through a gas path assembly; the strap is arranged on one side of the gas cylinder, and a rapid switching valve is arranged at the bottom of the gas cylinder; by means of the double-gas-path design, it is guaranteed that when the main gas path goes wrong, the standby gas path can continue to provide gas, safety of a user is guaranteed, by means of the arrangement of the rapid switching valve, the user can rapidly switch between the main gas path and the standby gas path conveniently, the pressure reducer ensures that the gas pressure is within the safety range, and the situation that high-pressure gas directly harms the human body is avoided; and the low-pressure alarm whistle reminds a user of insufficient pressure of the gas cylinder in time, so that danger caused by insufficient gas in an emergency is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of respiratory protection, in particular to a backpack positive pressure respirator with a spare air circuit. Background Art

[0002] Backpack positive pressure respirator is a kind of respiratory protection equipment designed for people working in toxic, harmful or hypoxic environment. With the acceleration of industrialization, especially in the fields of chemical industry, firefighting, rescue, etc., workers often need to face various harmful gases and hypoxic environment. Therefore, it is very important to provide them with efficient and reliable respiratory protection equipment.

[0003] Existing backpack positive pressure respirators are usually only equipped with a single air pipeline. When this air pipeline fails, is blocked or damaged, the user will immediately lose gas supply and face extremely high safety risks. Due to the lack of a backup air pipeline as an emergency guarantee, the user will not be able to continuously obtain clean air and will be forced to be exposed to toxic, harmful or oxygen-deficient environments, which poses a huge threat to their health and life safety and may cause the user to experience serious symptoms such as suffocation, dizziness or even coma, seriously affecting their ability to effectively escape or save themselves, thereby increasing the risk of accidents and the severity of the consequences. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing backpack positive pressure respirator has only a single air circuit, and the air source is lost when a fault occurs. There is no backup air circuit guarantee, which is easy to be exposed to harmful environment, endangering health and life, affecting escape and self-rescue, and increasing the risk of accidents.

[0005] The utility model solves the technical problem by adopting a technical solution: a backpack positive pressure respirator with a spare gas circuit, comprising a gas cylinder, and also comprising:

[0006] A gas circuit assembly, which is arranged at the bottom of the gas cylinder and consists of a main gas circuit and a spare gas circuit;

[0007] A face mask connected to the gas cylinder via an air path assembly;

[0008] A shoulder strap is arranged on one side of the gas cylinder.

[0009] As a preferred technical solution of the utility model, a quick switching valve is provided at the bottom of the gas cylinder, and the main gas circuit and the backup gas circuit both include a pressure reducer connected to the quick switching valve.

[0010] As a preferred technical solution of the utility model, a high-pressure pipe is fixedly connected to one side of the pressure reducer, a pressure gauge is fixedly connected to the end of the high-pressure pipe, and a low-pressure alarm whistle is provided on one side of the pressure gauge.

[0011] As a preferred technical solution of the utility model, a medium-pressure pipe is fixedly connected to one side of the pressure reducer, and a quick connector is provided at the end of the medium-pressure pipe.

[0012] As a preferred technical solution of the utility model, an air supply valve is arranged on the front of the mask, an air supply pipe is fixedly connected to one side of the air supply valve, a connecting block is fixedly connected to the end of the air supply pipe, and the connecting block is fixedly connected to the quick connector.

[0013] As a preferred technical solution of the utility model, the shoulder strap includes a back plate arranged on the front of the gas cylinder, and gas cylinder fixing belts are arranged on the upper and lower ends of the back plate, and the gas cylinder is fixedly installed on the back of the back plate by the gas cylinder fixing belts.

[0014] As a preferred technical solution of the utility model, a flame retardant waist belt is provided at the bottom of the shoulder strap, and flame retardant shoulder straps are provided on both sides of the shoulder strap.

[0015] The beneficial effects of the utility model are:

[0016] (1) The utility model adopts a dual gas circuit design to ensure that when a problem occurs in the main gas circuit, the backup gas circuit can continue to provide gas to ensure the safety of the user. The setting of the quick switching valve facilitates the user to quickly switch between the main gas circuit and the backup gas circuit. The pressure reducer ensures that the gas pressure is within a safe range to prevent high-pressure gas from directly causing harm to the human body. The low-pressure alarm whistle promptly reminds the user of insufficient gas cylinder pressure to avoid danger due to insufficient gas in an emergency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a bottom view of the structure of the utility model;

[0020] Figure 3 It is a rear perspective view of the shoulder strap of the utility model;

[0021] Figure 4 It is a schematic diagram of the structure of the gas circuit assembly of the utility model;

[0022] Figure 5 It is a frontal stereogram of the shoulder strap of the utility model.

[0023] In the figure: 1. gas cylinder; 2. gas circuit assembly; 201. main gas circuit; 202. backup gas circuit; 203. pressure reducer; 204. high-pressure pipe; 205. pressure gauge; 206. low-pressure alarm whistle; 207. medium-pressure pipe; 208. quick connector; 3. mask; 301. gas supply valve; 302. gas supply pipe; 303. connecting block; 4. shoulder strap; 401. back plate; 402. gas cylinder fixing strap; 403. flame retardant waist belt; 404. flame retardant shoulder strap; 5. quick switching valve. DETAILED DESCRIPTION

[0024] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] like Figures 1 to 5 As shown, the utility model provides a gas cylinder 1, and also includes:

[0027] The gas circuit assembly 2 is arranged at the bottom of the gas cylinder 1, and the gas circuit assembly 2 is composed of a main gas circuit 201 and a backup gas circuit 202;

[0028] A mask 3, which is connected to the gas cylinder 1 through an air path component 2;

[0029] The shoulder strap 4 is arranged on one side of the gas cylinder 1 .

[0030] Among them, the gas cylinder 1 is used to store high-pressure compressed air or oxygen. The gas in the gas cylinder 1 provides the user with a continuous and stable gas supply to ensure the safety of breathing in toxic, harmful or hypoxic environments. The gas circuit assembly 2 consists of a main gas circuit 201 and a backup gas circuit 202 to ensure that when one gas circuit fails, the other gas circuit can continue to provide gas. The mask 3 serves as a key interface of the respirator, which delivers the processed gas to the user's mouth and nose while preventing the entry of external pollutants. The shoulder strap 4 is provided to facilitate the user to carry the device.

[0031] Specifically, a quick switching valve 5 is provided at the bottom of the gas cylinder 1, and the main gas circuit 201 and the backup gas circuit 202 both include a pressure reducer 203 connected to the quick switching valve 5, a high-pressure pipe 204 is fixedly connected to one side of the pressure reducer 203, a pressure gauge 205 is fixedly connected to the end of the high-pressure pipe 204, a low-pressure alarm whistle 206 is provided on one side of the pressure gauge 205, a medium-pressure pipe 207 is fixedly connected to one side of the pressure reducer 203, and a quick connector 208 is provided at the end of the medium-pressure pipe 207.

[0032] Among them, the pressure reducer 203 reduces the high-pressure gas in the gas cylinder 1 to medium-pressure gas suitable for breathing. The high-pressure pipe 204 connects the pressure reducer 203 and the pressure gauge 205, which is used to transmit gas and display pressure. The pressure gauge 205 displays the residual pressure of the gas in the gas cylinder 1 to help the user judge the remaining use time of the gas cylinder 1. When the pressure in the gas cylinder 1 is lower than a certain set value, the low-pressure alarm whistle 206 can sound an alarm to remind the user to replace the gas cylinder 1 or evacuate the scene in time. The medium-pressure pipe 207 transmits the decompressed gas to the quick connector 208. The quick connector 208 facilitates the quick connection and disconnection of the mask 3 and the gas circuit assembly 2.

[0033] Specifically, an air supply valve 301 is provided on the front of the mask 3 , an air supply pipe 302 is fixedly connected to one side of the air supply valve 301 , a connecting block 303 is fixedly connected to the end of the air supply pipe 302 , and the connecting block 303 is fixedly connected to the quick connector 208 .

[0034] Among them, the air supply valve 301 controls the supply of gas to ensure that the gas enters the mask 3 stably and safely. The air supply pipe 302 connects the mask 3 and the quick connector 208 to transmit gas. The connecting block 303 ensures a stable connection between the air supply pipe 302 and the quick connector 208.

[0035] Specifically, the shoulder strap 4 includes a back plate 401 arranged on the front of the gas cylinder 1, and gas cylinder fixing belts 402 are arranged at the upper and lower ends of the back plate 401. The gas cylinder 1 is fixedly installed on the back of the back plate 401 through the gas cylinder fixing belts 402. A flame retardant waist belt 403 is arranged at the bottom of the shoulder strap 4, and flame retardant shoulder straps 404 are arranged on both sides of the shoulder strap 4.

[0036] Among them, the back plate 401 provides stable support, making the respirator more comfortable and safe to wear, the cylinder fixing belt 402 is used to fix the cylinder 1 to prevent it from shaking or shifting, the flame retardant belt 403 and the flame retardant shoulder strap 404 provide additional support and fixation, and at the same time use flame retardant materials to increase safety in use.

[0037] The working principle and use process of the utility model are as follows: first, the flame retardant waist belt 403 of the shoulder strap 4 is wrapped around the waist and adjusted to a suitable tightness, the flame retardant shoulder straps 404 are passed through the shoulders respectively and adjusted to a comfortable position, the gas cylinder 1 is placed on the back plate 401, and the gas cylinder 1 is firmly fixed on the back plate 401 through the gas cylinder fixing belt 402. When the user opens the valve of the gas cylinder 1, the high-pressure gas flows out of the gas cylinder 1, and the gas enters the main gas circuit 201 or the backup gas circuit 202 through the quick switching valve 5. The decompressed gas is transmitted to the pressure gauge 205 through the high-pressure pipe 204, and the current gas in the gas cylinder 1 is displayed. The residual pressure in the gas cylinder 1 is, when the pressure in the gas cylinder 1 is lower than a certain set value, the low-pressure alarm whistle 206 will sound an alarm to remind the user that the pressure in the gas cylinder 1 is insufficient, and the decompressed gas is then transmitted to the quick connector 208 through the medium-pressure pipe 207. The quick connector 208 is connected to the connecting block 303 on the mask 3, and the gas enters the mask 3 through the gas supply pipe 302. Inside the mask 3, the gas supply valve 301 controls the inflow and outflow of gas according to the user's breathing needs. If the main gas circuit 201 fails or the gas is insufficient, the user can switch to the backup gas circuit 202 through the quick switching valve 5 to ensure that the gas supply is not interrupted.

[0038] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A backpack positive pressure breathing apparatus with a backup gas circuit, comprising a gas cylinder (1), characterized in that: Also includes: A gas circuit assembly (2), the gas circuit assembly (2) being arranged at the bottom of the gas cylinder (1), the gas circuit assembly (2) being composed of a main gas circuit (201) and a backup gas circuit (202); A face mask (3), wherein the face mask (3) is connected to the gas cylinder (1) via an air path component (2); A shoulder strap (4), wherein the shoulder strap (4) is arranged on one side of the gas cylinder (1).

2. A backpack positive pressure breathing apparatus with a backup air circuit according to claim 1, characterized in that: A quick switching valve (5) is provided at the bottom of the gas cylinder (1), and both the main gas circuit (201) and the backup gas circuit (202) include a pressure reducer (203) connected to the quick switching valve (5).

3. A backpack positive pressure breathing apparatus with a backup air circuit according to claim 2, characterized in that: A high-pressure pipe (204) is fixedly connected to one side of the pressure reducer (203), a pressure gauge (205) is fixedly connected to the end of the high-pressure pipe (204), and a low-pressure alarm whistle (206) is provided on one side of the pressure gauge (205).

4. A backpack positive pressure breathing apparatus with a backup air circuit according to claim 2, characterized in that: A medium-pressure pipe (207) is fixedly connected to one side of the pressure reducer (203), and a quick connector (208) is provided at the end of the medium-pressure pipe (207).

5. The backpack positive pressure breathing apparatus with a backup air circuit according to claim 1, characterized in that: An air supply valve (301) is provided on the front of the mask (3); an air supply pipe (302) is fixedly connected to one side of the air supply valve (301); a connecting block (303) is fixedly connected to the end of the air supply pipe (302); and the connecting block (303) is fixedly connected to a quick connector (208).

6. A backpack positive pressure breathing apparatus with a backup air circuit according to claim 1, characterized in that: The shoulder strap (4) comprises a back plate (401) arranged on the front of the gas cylinder (1), gas cylinder fixing belts (402) are arranged at the upper and lower ends of the back plate (401), and the gas cylinder (1) is fixedly mounted on the back of the back plate (401) via the gas cylinder fixing belts (402).

7. The backpack positive pressure breathing apparatus with a backup air circuit according to claim 1, characterized in that: A flame retardant waist belt (403) is arranged at the bottom of the shoulder strap (4), and flame retardant shoulder straps (404) are arranged on both sides of the shoulder strap (4).

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