Positive pressure type air respirator

Abstract

The utility model discloses a positive pressure type air respirator, which relates to the technical field of air respirators and comprises a back plate, a supporting plate, an air bottle, a pressure reducing valve assembly and a first connecting air pipe, the supporting plate is fixedly arranged on the back plate, an inserting hole is formed in the supporting plate, the air bottle is connected with the pressure reducing valve assembly, one end, close to the pressure reducing valve assembly, of the air bottle is inserted into the inserting hole, and the other end of the air bottle is connected with the first connecting air pipe. The pressure reducing valve assembly is connected with the breathing mask through a first connecting air pipe; when the gas cylinder needs to be replaced, the gas cylinder together with the pressure reducing valve assembly is separated from the supporting plate, and a new gas cylinder and the pressure reducing valve assembly are replaced, so that the steps of detaching the used gas cylinder from the pressure reducing valve assembly and connecting the new gas cylinder to the pressure reducing valve assembly are saved, the time for replacing the gas cylinder is saved, and the working efficiency is improved. The gas cylinder replacement efficiency is improved, and then the rescue efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of breathing apparatus technology, and in particular to a positive pressure breathing apparatus. Background Technology

[0002] When firefighters enter fire rescue sites with oxygen deficiency or toxic and harmful exhaust gases, the positive pressure breathing apparatus they wear can effectively prevent the inhalation of toxic and harmful substances, thus effectively ensuring the safety of their respiratory system. At this time, firefighters basically do not rely on ambient air, but directly depressurize the high-pressure indoor air filled in the cylinder and then inhale it directly into their bodies, while the exhaled exhaust gas is directly discharged into the atmosphere through the exhalation valve. Therefore, the breathing apparatus plays a vital role in enabling firefighters to complete fire fighting and rescue work.

[0003] The applicant's known positive pressure breathing apparatus mainly includes a backplate, face mask, air cylinder, and pressure reducing valve assembly. The pressure reducing valve assembly is fixedly mounted on the backplate, and the air cylinder is fixed to the backplate by connecting to the pressure reducing valve assembly and using a fixing strap on the backplate. The air cylinder provides oxygen to the face mask. However, in practical applications of this design, when rescuers run out of oxygen in the air cylinder, they need to first unscrew the connection between the pressure reducing valve assembly and the air cylinder, and then loosen the air cylinder fixing strap before they can replace the air cylinder. After replacement, they need to screw the connection between the air cylinder and the pressure reducing valve again. This series of operations is time-consuming and laborious in the face of a fire with limited time, resulting in low air cylinder replacement efficiency and thus affecting rescue efficiency.

[0004] Therefore, there is an urgent need for a positive pressure air respirator that can replace air cylinders efficiently and improve rescue efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a positive pressure air respirator to solve the problems existing in the prior art. It uses a plug-in method to fix the air cylinder to the back plate, thereby improving the efficiency of air cylinder replacement and rescue.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a positive pressure air respirator, including a back plate, a support plate, an air cylinder, a pressure reducing valve assembly, and a first connecting air tube. The support plate is fixedly mounted on the back plate, and an insertion hole is provided on the support plate. The air cylinder is connected to the pressure reducing valve assembly, and one end of the air cylinder near the pressure reducing valve assembly is inserted into the insertion hole. The pressure reducing valve assembly is connected to a breathing mask through the first connecting air tube.

[0007] Preferably, the back plate is provided with a fixing strap for securing the gas cylinder.

[0008] Preferably, the pallet has a release hole on one side for the gas cylinder to be released laterally, and the release hole is connected to the insertion hole.

[0009] Preferably, the pallet is made of high-strength wear-resistant plastic.

[0010] Preferably, a reinforcing rib is provided between the tray and the back plate.

[0011] Preferably, the thickness of the tray gradually increases in the direction toward the back plate.

[0012] Preferably, the first connecting air tube is connected to the air inlet tube of the breathing mask via a quick connector.

[0013] Preferably, the back plate is provided with an electronic monitoring device for monitoring the remaining oxygen level in the gas cylinder, and the first connecting air tube is connected to the air inlet tube of the breathing mask and the air inlet tube of the electronic monitoring device respectively through a first three-way quick connector.

[0014] Preferably, the pressure reducing valve assembly is also connected to a pressure gauge and an alarm whistle via a second connecting air pipe.

[0015] Preferably, the first connecting air tube is connected to the air inlet tube of the breathing mask via a second three-way quick connector.

[0016] The present invention achieves the following main technical effects compared to the prior art:

[0017] When a gas cylinder needs to be replaced, simply remove the gas cylinder along with the pressure reducing valve assembly from the tray and replace it with a new gas cylinder and pressure reducing valve assembly. This saves the steps of removing the used gas cylinder from the pressure reducing valve assembly and connecting the new gas cylinder to the pressure reducing valve assembly, thus saving time and improving gas cylinder replacement efficiency, and consequently improving rescue efficiency.

[0018] The other solutions of this utility model achieve the following technical effects compared to the prior art:

[0019] By setting up quick connectors, the connection can be quickly disconnected when the gas cylinder is disassembled and used, which facilitates the replacement of the gas cylinder. After installing a new gas cylinder, the gas circuit can also be quickly connected, improving the efficiency of gas cylinder replacement. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the positive pressure air respirator in an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the back plate structure in an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the tray structure in an embodiment of the present utility model;

[0024] Figure 4 This is a top view of the tray in an embodiment of the present utility model;

[0025] Figure 5 This is a bottom view of the tray in an embodiment of the present invention;

[0026] Figure 6 This is a right view of the tray in an embodiment of the present invention;

[0027] The components include: 1. Back panel; 2. Support plate; 3. Gas cylinder; 4. Pressure reducing valve assembly; 5. First connecting air tube; 6. Insertion hole; 7. Disengagement hole; 8. Reinforcing rib; 9. Electronic monitoring device; 10. First tee quick connector; 11. Second tee quick connector; 12. Pressure gauge; 13. Second connecting air tube; 14. Shoulder strap. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] The purpose of this invention is to provide a positive pressure air respirator to solve the problems existing in the prior art. It uses a plug-in method to fix the air cylinder to the back plate, thereby improving the efficiency of air cylinder replacement and rescue.

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Please refer to the following: Figures 1-6As shown, a positive pressure air respirator is provided, including a backplate 1, a support plate 2, an air cylinder 3, a pressure reducing valve assembly 4, and a first connecting air tube 5. The air cylinder 3 has a cylindrical structure in the middle, and the diameter of the two ends of the air cylinder 3 gradually decreases. The backplate 1 is provided with a shoulder strap 14 for the user to carry the backplate 1. The support plate 2 is fixedly mounted on the backplate 1. Specifically, the support plate 2 can be integrally mounted on the backplate 1 or fixed to the backplate 1 by bolts. The support plate 2 has a plug hole 6. The air cylinder 3 is connected to the pressure reducing valve assembly 4. The end of the air cylinder 3 near the pressure reducing valve assembly 4 is inserted into the plug hole 6. The diameter is smaller than the diameter of the cylindrical part in the middle of the gas cylinder 3. The pressure reducing valve assembly 4 is connected to the breathing mask through the first connecting air tube 5. Compared with the conventional positive pressure air respirator, the pressure reducing valve assembly 4 is no longer connected to the back plate 1. When the gas cylinder 3 needs to be replaced, the gas cylinder 3 and the pressure reducing valve assembly 4 are removed from the support plate 2, and a new gas cylinder 3 and the pressure reducing valve assembly 4 can be replaced. This saves the steps of removing the used gas cylinder 3 from the pressure reducing valve assembly 4 and connecting the new gas cylinder 3 to the pressure reducing valve assembly 4, saving the time of replacing the gas cylinder 3, improving the efficiency of gas cylinder 3 replacement, and thus improving the efficiency of rescue.

[0032] A fixing strap can be installed on the back plate 1 to work with the support plate 2 to fix the gas cylinder 3, ensuring that the gas cylinder 3 will not fall off during the rescue. The structure of the fixing strap can be the same as that of the fixing strap used to fix the gas cylinder 1 in a conventional positive pressure air breathing apparatus.

[0033] The support plate 2 has a detachment hole 7 on one side for the gas cylinder 3 to detach laterally. The detachment hole 7 is connected to the insertion hole 6. When replacing the gas cylinder 3, the gas cylinder 3 can be directly slid laterally out of the detachment hole 7, which further improves the convenience of replacing the gas cylinder 3.

[0034] In this embodiment, the pallet 2 is made of high-strength wear-resistant plastic, such as nylon or polytetrafluoroethylene, which improves the protection of the gas cylinder 3 and reduces weight. In other embodiments, the pallet 2 can also be made of metal, which has high overall strength.

[0035] A reinforcing rib 8 is provided between the support plate 2 and the back plate 1 to further improve the structural strength.

[0036] The thickness of the tray 2 gradually increases in the direction toward the back plate 1, which increases the structural strength at the connection between the tray 2 and the back plate 1 and prevents the tray 2 from breaking at the connection with the back plate 1.

[0037] The first connecting air tube 5 is connected to the air inlet tube of the breathing mask via a quick connector. When the used air cylinder 3 is disassembled, the connection can be quickly disconnected, which facilitates the replacement of the air cylinder 3. After installing a new air cylinder 3, the air circuit can also be quickly connected, improving the replacement efficiency of the air cylinder 3.

[0038] In this embodiment, an electronic monitoring device 9 for monitoring the oxygen balance of the gas cylinder 3 is provided on the back plate 1. The electronic monitoring device 9 can be equipped with an alarm, which will sound an alarm when the oxygen balance is lower than the set value. Based on the electronic monitoring device 9, the first connecting air pipe 5 is connected to the air inlet pipe of the breathing mask and the air inlet pipe of the electronic monitoring device 9 respectively through the first three-way quick connector 10.

[0039] To ensure that gas cylinder 3 can be replaced in a timely manner, pressure reducing valve assembly 4 is also connected to pressure gauge 12 and alarm whistle via second connecting gas pipe 13, which, together with electronic monitoring device 9, can play a dual monitoring role.

[0040] The first connecting air tube 5 can be connected to the air inlet tube of the breathing mask through the second three-way quick connector 11. One of the outlets of the three-way connector supplies air to the breathing mask, and the other can be used as a rescue interface to supply air to the breathing masks of other rescuers in an emergency or for other purposes.

[0041] In other embodiments, the second connecting air tube 13 can be connected to the pressure gauge 12 and the alarm whistle via a quick connector.

[0042] Both the first connecting air pipe 5 and the second connecting air pipe 13 are integrated with the pressure reducing valve assembly 4. The first connecting air pipe 5 and the second connecting air pipe 13 can be designed on the same side of the pressure reducing valve assembly 4 or on both sides of the pressure reducing valve assembly 4.

[0043] In the actual process of replacing gas cylinder 3, first disconnect the first three-way quick connector 10, untie the fixing strap, and directly remove gas cylinder 3 and pressure reducing valve assembly 4 from the release hole 7 of the support plate 2. After replacing the new gas cylinder 3 and pressure reducing valve assembly 4, tie the fixing strap, and connect the first three-way quick connector 10 of the first connecting air pipe 5 of the new pressure reducing valve assembly 4 to the air inlet pipe of the breathing mask and the air inlet pipe of the electronic monitoring device 9 respectively.

[0044] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0045] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A positive pressure air respirator, characterized in that, The device includes a back plate, a support plate, a gas cylinder, a pressure reducing valve assembly, and a first connecting air tube. The support plate is fixedly mounted on the back plate and has an insertion hole. The gas cylinder is connected to the pressure reducing valve assembly, with one end of the gas cylinder near the pressure reducing valve assembly inserted into the insertion hole. The pressure reducing valve assembly is connected to a breathing mask through the first connecting air tube.

2. The positive pressure air respirator according to claim 1, characterized in that, The back plate is provided with fixing straps for securing the gas cylinder.

3. The positive pressure air respirator according to claim 1, characterized in that, The support plate has a release hole on one side for the gas cylinder to be detached laterally, and the release hole is connected to the insertion hole.

4. The positive pressure air respirator according to claim 1, characterized in that, The tray is made of high-strength, wear-resistant plastic.

5. The positive pressure air respirator according to claim 1, characterized in that, A reinforcing rib is provided between the tray and the back plate.

6. The positive pressure air respirator according to claim 5, characterized in that, The thickness of the tray gradually increases in the direction toward the back plate.

7. The positive pressure air respirator according to claim 1, characterized in that, The first connecting air tube is connected to the air inlet tube of the breathing mask via a quick connector.

8. The positive pressure air respirator according to claim 1, characterized in that, The backplate is equipped with an electronic monitoring device for monitoring the remaining oxygen level in the gas cylinder. The first connecting air tube is connected to the air inlet tube of the breathing mask and the air inlet tube of the electronic monitoring device via a first three-way quick connector.

9. The positive pressure air respirator according to claim 8, characterized in that, The pressure reducing valve assembly is also connected to a pressure gauge and an alarm whistle via a second connecting air pipe.

10. The positive pressure air respirator according to claim 1, characterized in that, The first connecting air tube is connected to the air inlet tube of the breathing mask via a second three-way quick connector.

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