Isolation type compressed oxygen self-rescuer capable of controlling air volume

Abstract

The utility model discloses an isolated compressed oxygen self-rescuer capable of controlling air volume, which relates to the technical field of self-rescuers and comprises an air bottle used for storing compressed oxygen; the switch group is arranged at the opening of the gas cylinder and is used for controlling the inflow of oxygen; the lower end of the pressure gauge is connected with a gauge pad and arranged at the upper end of the switch group for monitoring the pressure in the gas cylinder; the pressure reducer comprises an inner shell and an outer shell, the pressure reducer is connected to the switch group through the inner shell for pressure reduction treatment, and one side of the outer shell is further provided with a safety valve and a quantitative hole; the control switch is arranged on the pressure reducer, the control switch comprises a button, the button is pressed to control the oxygen output, the pressure reducer with the quantitative component and the control switch is introduced, a user can adjust the oxygen output by pressing the button, oxygen supply according to needs is achieved, and the national standard requirement is met; and the problems of oxygen waste and oxygen insufficiency at critical time are solved. Meanwhile, the quantitative component is tightly matched with the pressure reducer, so that the stability and the accuracy of the oxygen flow are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of self-rescuers, in particular to an isolated compressed oxygen self-rescuer with controllable air volume. Background Technique

[0002] In high-risk working environments such as mines, chemical industries, and tunnel construction, providing reliable oxygen supply in case of emergencies is the key to ensuring the safety of personnel. In the existing national standards, when the oxygen cylinder pressure is 20 MPa to 3 MPa, the quantitative oxygen supply should not be less than 2.1 L / min at a breathing volume of 35 L / min, and should not be less than 0.5 L / min at a breathing volume of 10 L / min. The oxygen supply of traditional isolated compressed oxygen self-rescuers is in a fixed mode and cannot be adjusted as much as possible to meet the national standard requirements. During emergency escape or long-term operation, the oxygen flow cannot be accurately adjusted according to actual needs, which may not only cause oxygen waste but also endanger life safety due to insufficient oxygen at critical moments. Content of the Utility Model

[0003] The purpose of the utility model is to provide an isolated compressed oxygen self-rescuer with controllable air volume to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: an isolated compressed oxygen self-rescuer with controllable air volume, including: an oxygen cylinder for storing compressed oxygen; a switch group arranged at the bottle mouth of the oxygen cylinder for controlling the inflow of oxygen; a pressure gauge with a gasket connected to the lower end and arranged above the switch group for monitoring the pressure in the oxygen cylinder; a pressure reducer including an inner shell and an outer shell, wherein the pressure reducer is connected to the switch group through the inner shell for pressure reduction treatment, and a safety valve and a quantitative hole are also arranged on one side of the outer shell; a control switch arranged on the pressure reducer, and the control switch includes a button, and the air outlet volume of oxygen is controlled by pressing the button.

[0005] Preferably, the control switch includes a split upper shell, a split lower shell and a quantitative component, wherein the quantitative component is arranged in the pressure reducer and a gasket is connected between the two, the split lower shell is embedded in the pressure reducer and located above the quantitative component, the button is movably arranged in the split upper shell, a buckle is arranged at the lower end of the button, a valve rod is arranged in the split lower shell, the buckle is arranged outside the valve rod, and the lower end of the valve rod is connected with a compression spring, and the other end of the compression spring abuts against the quantitative component.

[0006] Preferably, an air outlet hole is opened on the side wall of the split upper shell, the buckle is in a ring structure and three convex columns are arrayed on the outside of the buckle, and meshing teeth are arranged on the side of the buckle facing the button.

[0007] Preferably, the outer shell and the inner shell of the pressure reducer are connected by a fastening nut. The pressure reducer further includes a piston group and a self-compensating valve. A self-compensating spring is arranged between the piston group and the self-compensating valve, and a pressure reducer spring is arranged between the piston group and the inner shell. A contact rod and a contact are inserted on one side of the self-compensating valve.

[0008] Preferably, an air passage is arranged in the middle of the piston group, and the air passage communicates with the inside of the outer shell. Three through holes are opened on the outer shell and respectively correspond to a safety valve, a metering hole, and a control switch.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows: The design of the pressure reducer with metering components and a control switch is introduced. Users can adjust the oxygen output by pressing a button, realizing oxygen supply on demand and meeting the national standard requirements, effectively avoiding the problems of oxygen waste and insufficient oxygen at critical moments. At the same time, the close cooperation between the metering components and the pressure reducer ensures the stability and accuracy of the oxygen flow rate. Description of the Drawings

[0010] Figure 1 is the overall cross-sectional view of the embodiment of the present utility model;

[0011] Figure 2 is the structural schematic diagram of the pressure reducer of the embodiment of the present utility model;

[0012] Figure 3 is the side view of the pressure reducer of the embodiment of the present utility model;

[0013] Figure 4 is Figure 3 the sectional view taken along the C-C direction of

[0014] Figure 5 is the structural schematic diagram of the control switch of the embodiment of the present utility model;

[0015] Figure 6 is the internal structural schematic diagram of the control switch of the embodiment of the present utility model.

[0016] In the figure:

[0017] 10. Gas cylinder;

[0018] 20. Switch group;

[0019] 30. Pressure gauge; 301. Gauge pad;

[0020] 40. Pressure reducer; 401. Outer shell; 402. Self-compensating spring; 403. Piston group; 404. Pressure reducer spring; 405. Self-compensating valve;

[0021] 50. Control switch; 501. Button; 502. Split upper shell; 5021. Air vent; 503. Split lower shell; 504. Quantitative component; 505. Gasket; 506. Snap; 507. Valve stem; 508. Compression spring;

[0022] 60. Contact rod;

[0023] 70. Safety valve;

[0024] 80. Quantitative hole. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1-6 , an isolated compressed oxygen self-rescuer capable of controlling the gas volume, comprising a gas cylinder 10 for storing compressed oxygen; a switch group 20 provided at the bottle mouth of the gas cylinder 10 for controlling the inflow of oxygen; a pressure gauge 30 with a gauge pad 301 connected to the lower end and provided above the switch group 20 for monitoring the pressure inside the gas cylinder 10; a pressure reducer 40, including an inner shell and an outer shell 401, wherein the pressure reducer 40 is connected to the switch group 20 through the inner shell for pressure reduction processing, and a safety valve 70 and a quantitative hole 80 are further provided on one side of the outer shell 401; a control switch 50 provided on the pressure reducer 40, and the control switch 50 includes a button 501 for controlling the oxygen outlet volume by pressing the button 501.

[0027] It should be noted that through the precise cooperation between the inner shell and the outer shell 401 of the pressure reducer 40, safe and stable pressure reduction processing of high-pressure oxygen is achieved. The pressure reducer 40 is internally provided with a pressure reduction mechanism, including key components such as a piston group 403, a self-compensating valve 405, and a pressure reducer spring 404, which cooperate to reduce high-pressure oxygen to a low-pressure state suitable for human breathing. At the same time, a safety valve 70 and a quantitative hole 80 are also provided on one side of the outer shell 401 of the pressure reducer 40. Among them, the safety valve 70 automatically opens to release excess gas when the pressure is too high to protect the safety of the equipment; the quantitative hole 80 is used to limit the oxygen flow under specific conditions to achieve precise control of the gas volume.

[0028] The control switch 50 is arranged above the pressure reducer 40 and is designed with a split structure, including parts such as a split upper shell 502, a split lower shell 503, and a metering component 504. Inside the control switch 50, there are components such as a movable button 501, a buckle 506, a valve rod 507, and a compression spring 508. By pressing the button 501, the valve rod 507 can be driven to move and control the oxygen output of the metering component 504, thereby realizing the adjustment of the oxygen output. In addition, an air outlet hole 5021 is opened on the side wall of the split upper shell 502 for outputting the adjusted oxygen. The design of the control switch 50 fully considers the ergonomic principle and is simple and fast to operate.

[0029] Specifically, the control switch 50 includes a split upper shell 502, a split lower shell 503, and a metering component 504. The metering component 504 is arranged inside the pressure reducer 40 and a gasket 505 is connected between them. The split lower shell 503 is embedded in the pressure reducer 40 and is located above the metering component 504. The button 501 is movably arranged inside the split upper shell 502. A buckle 506 is arranged at the lower end of the button 501. A valve rod 507 is arranged inside the split lower shell 503. The buckle 506 is arranged outside the valve rod 507. The lower end of the valve rod 507 is connected with a compression spring 508, and the other end of the compression spring 508 abuts against the metering component 504.

[0030] It should be noted that when the oxygen output needs to be adjusted, first press the movable button 501 inside the split upper shell 502. After the button 501 is subjected to an external force, it moves downward and drives the valve rod 507 inside the split lower shell 503 to move downward synchronously through the buckle 506. The downward movement of the valve rod 507 will compress the compression spring 508 below and change its relative position with the metering component 504. This change will directly affect the oxygen output degree of the metering component 504, thereby realizing the adjustment of the oxygen output. When the operator releases the button 501, the compression spring 508 pushes the valve rod 507 to quickly reset under the action of its own elastic force, restoring the original state of the metering component 504. At this time, the oxygen output returns to the preset value or the closed state.

[0031] Specifically, an air outlet hole 5021 is opened on the side wall of the split upper shell 502. The buckle 506 is in a ring structure and there are three convex columns arrayed on the outside of the buckle 506. The buckle 506 is provided with meshing teeth on the side facing the button 501.

[0032] It should be noted that the buckle 506 and the button 501 are matched through meshing teeth. Convex columns are arranged on the outside of the buckle 506. A notch is opened at the upper end of the metering component 504. The convex columns are clamped in the notch to form a limit. At the same time, the buckle 506 is locked by pressing the button 501, so as to adjust the oxygen output.

[0033] Specifically, the outer shell 401 of the pressure reducer 40 is connected to the inner shell by a fastening nut. The pressure reducer 40 further includes a piston group 403 and a self-compensating valve 405. A self-compensating spring 402 is provided between the piston group 403 and the self-compensating valve 405. A pressure reducer 40 spring is provided between the piston group 403 and the inner shell. A contact rod 60 and a contact are inserted on one side of the self-compensating valve 405.

[0034] It should be noted that when high-pressure oxygen enters the pressure reducer 40 from the gas cylinder 10, it first undergoes preliminary pressure reduction treatment by the piston group 403. The piston group 403 moves under the action of the pressure reducer 40 spring to change the volume of the pressure reduction chamber, thereby reducing the oxygen pressure. As the oxygen pressure decreases, the contact senses the pressure change and transmits a signal to the self-compensating valve 405. When the pressure in the pressure reduction chamber drops to the set value, the self-compensating valve 405 automatically opens under the action of the self-compensating spring 402 to supplement oxygen from the outside to maintain pressure stability. The control switch 50 controls the oxygen output volume by adjusting the oxygen output degree of the metering component 504. The operator can adjust the button 501 to control the movement of the valve rod 507, thereby changing the flow area of the metering component 504 to achieve the purpose of adjusting the gas volume.

[0035] Specifically, an air passage is provided in the middle of the piston group 403, and the air passage communicates with the inside of the outer shell 401. Three through holes are opened on the outer shell 401 and respectively correspond to a safety valve 70, a metering hole 80, and a control switch 50.

[0036] It should be noted that the high-pressure oxygen only undergoes a pressure reduction operation through the pressure reducer 40 via the air passage. The oxygen after pressure reduction enters the three through holes and then enters the safety valve 70, the metering hole 80, and the control switch 50 respectively. An air outlet hole 5021 is provided on the control switch 50. After operating the control switch 50, it is used to adjust the oxygen output volume to meet special requirements.

[0037] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. An isolated compressed oxygen self-rescuer with controllable gas volume, characterized in that: include: Gas cylinders, used to store compressed oxygen; A switch group, arranged at the mouth of the gas cylinder, is used to control the inflow of oxygen; A pressure gauge, the lower end of which is connected to a gauge pad and is arranged on the upper end of the switch group for monitoring the pressure in the gas cylinder; A pressure reducer, comprising an inner shell and an outer shell, wherein the pressure reducer is connected to a switch group through the inner shell for pressure reduction, and a safety valve and a quantitative hole are also provided on one side of the outer shell; The control switch is arranged on the pressure reducer and comprises a button, and the oxygen output volume is controlled by pressing the button.

2. The isolated compressed oxygen self-rescuer with controllable gas volume according to claim 1 is characterized in that: The control switch includes a split upper shell, a split lower shell and a quantitative component, wherein the quantitative component is arranged in the pressure reducer and a sealing gasket is connected between the two, the split lower shell is embedded in the pressure reducer and is located above the quantitative component, the button is movably arranged in the split upper shell, a buckle is arranged at the lower end of the button, a valve stem is arranged in the split lower shell, the buckle is arranged on the outside of the valve stem, a compression spring is connected to the lower end of the valve stem, and the other end of the compression spring abuts against the quantitative component.

3. The isolated compressed oxygen self-rescuer with controllable gas volume according to claim 2 is characterized in that: An air outlet is provided on the side wall of the split upper shell. The buckle is annular in structure and has three convex columns arranged in an array on the outer side of the buckle. The buckle is provided with meshing teeth on the side facing the button.

4. The isolated compressed oxygen self-rescuer with controllable gas volume according to claim 1 is characterized in that: The outer shell and inner shell of the pressure reducer are connected by a fastening nut. The pressure reducer also includes a piston group and a self-compensating valve, wherein a self-compensating spring is arranged between the piston group and the self-compensating valve, a pressure reducer spring is arranged between the piston group and the inner shell, and a contact rod and a contact are inserted on one side of the self-compensating valve.

5. The isolated compressed oxygen self-rescuer with controllable gas volume according to claim 4 is characterized in that: An air passage is arranged in the middle of the piston group, and the air passage is connected to the inside of the shell. The shell is provided with three through holes corresponding to the safety valve, the quantitative hole and the control switch respectively.

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