A portable liquid oxygen breather

Abstract

The utility model discloses a portable liquid oxygen respirator belongs to respirator equipment field, it includes outer jar, inner jar, output unit and filling unit, the inner jar set up in the inside of outer jar, and the clearance is left around and upper and lower of inner jar, and the vacuum passage that communicates with clearance is equipped in the middle part of inner jar, and the clearance and vacuum passage vacuum form vacuum space and are filled with heat insulating material, output unit includes liquid phase pipe, gas phase pipe, gear switch and output interface, and liquid phase pipe and gas phase pipe all extend to the inside of inner jar, and liquid phase pipe and gas phase pipe are taken out from the bottom of inner jar, and after passing through vacuum passage, the input end communication of gear switch, and the output end communication of gear switch and output interface, the filling unit is used for pouring liquid oxygen to inner jar, and the bending part of 180 degrees is equipped at the position of liquid phase pipe in the top of inner jar. This portable liquid oxygen respirator can store liquid oxygen efficiently, prevent liquid oxygen backflow, guarantee the stable pressure in jar.

Description

Technical Field

[0001] This utility model belongs to the field of respirator equipment, specifically relating to a portable liquid oxygen respirator. Background Technology

[0002] A liquid oxygen respirator is a device used to store and supply liquid oxygen, widely used in medical, industrial, and diving fields. A portable liquid oxygen respirator's structure is illustrated in Chinese Patent No. CN 217567180 U, which discloses a combined sealing structure for a portable liquid oxygen respirator. This portable liquid oxygen respirator includes a liquid oxygen storage tank and a liquid oxygen filling valve assembly. The liquid oxygen storage tank is screwed to the liquid oxygen filling valve assembly at the top, with an elastic gasket under each screw. The liquid oxygen filling valve assembly includes an vent valve and a liquid oxygen filling valve, both equipped with cryogenic sealing caps. An evaporation coil spirally wound around the neck of the vacuum storage tank is mounted on the liquid oxygen filling valve assembly at one end and connected to an outlet port at the other end. The outlet port can be connected to a breathing mask.

[0003] Traditional liquid oxygen breathing apparatuses suffer from the following problems: liquid oxygen is prone to evaporation due to heat conduction during storage, affecting storage time; improperly designed liquid oxygen pipelines are susceptible to backflow or leakage; and the lack of effective safety control mechanisms makes it impossible to ensure stable pressure inside the tank. Therefore, there is an urgent need for a liquid oxygen breathing apparatus structure that can efficiently store liquid oxygen, prevent backflow, and ensure safe use. Utility Model Content

[0004] The purpose of this invention is to provide a portable liquid oxygen breathing apparatus to solve the problems of traditional liquid oxygen breathing apparatus, such as easy liquid oxygen evaporation, easy liquid oxygen backflow or leakage, and inability to ensure stable pressure inside the tank.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] This utility model relates to a portable liquid oxygen respirator, which includes an outer tank, an inner tank, an output unit, and a filling unit. The inner tank is located inside the outer tank, and gaps are left around its perimeter and top and bottom. A vacuum channel communicating with the gaps is provided in the middle of the inner tank. The gaps and the vacuum channel are evacuated to form a vacuum space and filled with heat-insulating material. The output unit includes a liquid phase tube, a gas phase tube, a gear switch, and an output interface. Both the liquid phase tube and the gas phase tube extend into the inner tank and pass through the bottom of the inner tank. After passing through the vacuum channel, they are connected to the input terminal of the gear switch, and the output terminal of the gear switch is connected to the output interface. The filling unit is used to fill the inner tank with liquid oxygen.

[0007] Preferably, the output unit further includes a distributor, which has a gas chamber; the gas phase pipe is connected to and communicates with the gas chamber, and the gas chamber is connected to the gear switch through a pipe, so that the gas phase pipe is connected to the gear switch; the liquid phase pipe passes through the gas chamber and is connected to the gear switch through a coil.

[0008] Preferably, an air vent valve is provided on the side of the air chamber.

[0009] Preferably, the diameter of the liquid phase tube is smaller than that of the gas phase tube, the liquid phase tube passes through the gas phase tube, and the portion of the liquid phase tube passing through the gas phase tube is coaxial with the gas phase tube.

[0010] Preferably, the liquid phase pipe has a 180-degree bend at the top of the inner tank to prevent liquid oxygen backflow and leakage.

[0011] Preferably, the filling unit includes a filling valve and a filling pipe, one end of which is connected to the filling valve and extends from the bottom of the inner tank to the inside of the inner tank after passing through a vacuum channel.

[0012] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0013] 1. The portable liquid oxygen respirator of this utility model has gaps around the inner tank and at the top and bottom of the outer tank. A vacuum channel communicating with the gaps is located in the middle of the inner tank. The gaps and vacuum channel are evacuated to create a vacuum space, which is then filled with insulating material. Both the liquid phase pipe and the gas phase pipe are connected to the position switch and output interface via the vacuum channel. The vacuum treatment between the inner and outer tanks and the filling with insulating material reduce heat transfer. The liquid phase pipe and gas phase pipe are connected to the position switch outside the tank via the vacuum channel, and the pipes do not contact the inner tank, preventing heat conduction from accelerating liquid oxygen consumption.

[0014] 2. The liquid phase tube of the portable liquid oxygen respirator involved in this utility model has a 180-degree bend at the top of the inner tank to ensure that the liquid oxygen does not flow back and to prevent liquid oxygen leakage.

[0015] 3. The portable liquid oxygen respirator of this utility model is equipped with a gear switch to control the output of liquid oxygen or oxygen vaporized in the tank and to adjust the output flow rate, effectively utilizing the oxygen vaporized in the tank. It also includes a distributor with a gas chamber. A gas phase pipe is connected to and communicates with the gas chamber. The gas chamber is connected to the gear switch via a pipe. A vent valve is located on the side of the gas chamber. The vent valve is used to set an exhaust pressure threshold. When the gas pressure inside the tank is too high, the vent valve automatically releases gas when the exhaust pressure threshold is reached. The vent valve also serves to empty the gas inside the tank before filling with liquid oxygen. The dual safety valve design of the gear switch and the vent valve ensures stable pressure inside the tank and safe use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the portable liquid oxygen respirator involved in this utility model.

[0017] Reference numerals: 1-Outer tank, 2-Inner tank, 3-Filling pipe, 4-Vacuum channel, 5-Coil, 6-Gear switch, 7-Filling valve, 8-Output interface, 9-Vacuum valve, 10-Distributor, 11-Gas phase pipe, 12-Liquid phase pipe, 13-Gas chamber. Detailed Implementation

[0018] To further understand the content of this utility model, the following embodiments are described in detail. The embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0019] See attached document Figure 1 As shown, this utility model relates to a portable liquid oxygen respirator, comprising an outer tank 1, an inner tank 2, an output unit, and a filling unit. The inner tank 2 is disposed inside the outer tank 1, and gaps are left around its perimeter and top and bottom. A vacuum channel 4 is provided in the middle of the inner tank 2, which is connected to the gaps from top to bottom. The gaps and the vacuum channel are evacuated to form a vacuum space, which is then filled with heat-insulating material to form a heat-insulating structure.

[0020] The output unit includes a liquid phase pipe 12, a gas phase pipe 11, a distributor 10, a gear switch 6, and an output interface 8. The diameter of the liquid phase pipe 12 is smaller than that of the gas phase pipe 11. The liquid phase pipe 12 passes through the gas phase pipe 11, and the portions of the liquid phase pipe 12 and gas phase pipe 11 passing through the gas phase pipe 11 are coaxially arranged. Both the liquid phase pipe 12 and the gas phase pipe 11 extend into the inner tank 2, and exit from the bottom of the inner tank. The exit points are welded to the inner tank 2 and then sealed. The end of the liquid phase pipe 12 located in the inner tank 2 extends to the bottom of the inner tank 2, and the end of the gas phase pipe 11 located in the inner tank 2 extends to the top of the inner tank 2. The liquid phase pipe 12 has a 180-degree bend at the top of the inner tank 2 to prevent liquid oxygen backflow and leakage. The gas phase pipe 11 and liquid phase pipe 12 are connected to the distributor 10 via the vacuum channel 4, and then connected to the gear switch 6 via the distributor 10. Specifically, the gear switch 6 has two input terminals and one output terminal, and the distributor 10 has a gas chamber 13. The gas phase pipe 11 is connected to and communicates with the gas chamber 13. The gas chamber 13 is then connected to one of the input terminals of the gear switch 6 via a pipe, thus connecting the gas phase pipe 11 to the gear switch 6. The liquid phase pipe 12 passes through the gas chamber 13 and is connected to the other input terminal of the gear switch 6 via a coil 5, thus connecting the liquid phase pipe 12 to the gear switch 6. The length of the coil 5 needs to be long enough to ensure that the liquid oxygen can be fully vaporized in the coil 5. An exhaust valve 9 is provided on the side of the gas chamber. The exhaust valve 9 is used to set the exhaust pressure threshold. When the gas pressure in the inner tank 2 is too high and the exhaust pressure threshold is reached, it will automatically open and exhaust gas. The output terminal of the gear switch 6 is connected to the output interface 8 via a flexible hose.

[0021] The filling unit is used to fill the inner tank with liquid oxygen. The filling unit includes a filling valve 7 and a filling pipe 3. One end of the filling pipe 3 is connected to the filling valve 7. The filling pipe 3 extends from the bottom of the inner tank 2 to a position near the top inside the inner tank 2 after passing through a vacuum channel 4. The vacuum channel 4 reduces heat conduction during liquid oxygen filling, thus reducing liquid oxygen oxidation. The connection between the filling pipe 3 and the inner tank 2 is sealed to prevent liquid oxygen leakage.

[0022] The manufacturing process of the aforementioned portable liquid oxygen respirator is as follows: First, holes for the filling pipe 3 and the gas phase pipe 11 are pre-drilled on the bottom end cap of the inner tank 2. After inserting the liquid phase pipe 12 into the gas phase pipe 11, the combination of the gas phase pipe 11 and the liquid phase pipe 12, as well as the filling pipe 3, are bent. The bent combination of the gas phase pipe 11 and the liquid phase pipe 12, as well as the filling pipe 3, are then inserted into the corresponding holes for circumferential welding. The bottom end cap and the top end cap are welded to the tank body to form a sealed inner tank 2. The inner tank 2 is connected to the bottom end cap of the outer tank 1 via a connecting column (the two ends of the connecting column are welded to the end caps of the inner tank 2 and the outer tank 1, respectively). Holes for the gas phase pipe 11 and the filling pipe 3 to pass through are pre-drilled on the upper end cap of the outer tank 1. The upper and lower end caps of the outer tank are welded to the tank body of the outer tank, allowing the gas phase pipe 11 and the filling pipe 3 to pass through the holes in the upper end cap of the outer tank 1. The exit points are welded and sealed to form the final tank body. Figure 1 The structure involves inserting the coil 5, gear switch 6, filling valve 7, output interface, vent valve 9, and distributor 10 into the bottle cap, connecting the liquid phase pipe 12 to the coil 5, connecting the gas phase pipe 11 to the gas chamber 13 of the distributor 10, connecting the filling pipe 3 to the filling valve 7, and finally fixing the bottle cap to the tank body to form a portable liquid oxygen respirator.

[0023] When storing liquid oxygen in the aforementioned portable liquid oxygen respirator, the liquid oxygen inevitably vaporizes, forming oxygen at the top of the inner tank. When the oxygen pressure gradually increases and exceeds the threshold (0.095 MPa) set by the vent valve 9, the vent valve 9 opens and releases some oxygen. During use, the gear position is adjusted via the gear switch 6 to select either direct oxygen discharge through the gas phase pipe 11 or liquid oxygen discharge through the liquid phase pipe 12. When discharging liquid oxygen, it fully vaporizes in the coil 5 to form oxygen at room temperature and pressure. Regardless of whether oxygen or liquid oxygen is selected, the gear switch 6 can be set to different gears to control the final oxygen flow rate from the output port. During the liquid oxygen filling process, the vent valve 9 needs to be opened simultaneously to release gas and ensure that the pressure inside the tank does not become excessive.

[0024] The present invention has been described in detail above with reference to the embodiments. However, the description is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made in accordance with the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A portable liquid oxygen respirator, characterized in that: It includes an outer tank, an inner tank, an output unit, and a filling unit. The inner tank is located inside the outer tank, with gaps around its sides and top and bottom. A vacuum channel communicating with the gaps is located in the middle of the inner tank. The gaps and the vacuum channel are evacuated to form a vacuum space, which is then filled with insulating material. The output unit includes a liquid phase pipe, a gas phase pipe, a gear switch, and an output interface. Both the liquid phase pipe and the gas phase pipe extend into the inner tank and pass through the bottom of the inner tank. After passing through the vacuum channel, they are connected to the input terminal of the gear switch, and the output terminal of the gear switch is connected to the output interface. The filling unit is used to fill the inner tank with liquid oxygen.

2. The portable liquid oxygen respirator according to claim 1, characterized in that: The output unit also includes a distributor, which has a gas chamber; the gas phase pipe is connected to and communicates with the gas chamber, and the gas chamber is connected to the gear switch through a pipe, so that the gas phase pipe is connected to the gear switch; the liquid phase pipe passes through the gas chamber and is connected to the gear switch through a coil.

3. The portable liquid oxygen respirator according to claim 2, characterized in that: An air vent valve is provided on the side of the air chamber.

4. The portable liquid oxygen respirator according to claim 1, characterized in that: The diameter of the liquid phase tube is smaller than that of the gas phase tube. The liquid phase tube passes through the gas phase tube, and the portion of the liquid phase tube that passes through the gas phase tube is coaxial with the gas phase tube.

5. The portable liquid oxygen respirator according to claim 1, characterized in that: The liquid phase pipe is provided with a 180-degree bend at the top of the inner tank.

6. The portable liquid oxygen respirator according to claim 1, characterized in that: The filling unit includes a filling valve and a filling pipe. One end of the filling pipe is connected to the filling valve and extends from the bottom of the inner tank to the inside of the inner tank after passing through a vacuum channel.

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