Decompression quantitative oxygen generating device

Abstract

The utility model relates to the technical field of mineral engineering, and discloses a decompression quantitative oxygen generating device which comprises a generator body, a high-pressure gas inlet is formed in the first end of the generator body, and a first quantitative hole, a second quantitative hole, a decompression hole and a manual air supplementing hole are formed in the second end of the generator body. A pressure reducing chamber communicated with the high-pressure gas inlet is arranged in the generator main body; the first quantitative hole, the second quantitative hole, the pressure relief hole and the manual gas supplementing hole are respectively communicated with the pressure reducing chamber through independent gas channels; and a needle valve switch is arranged on the generator main body and is used for controlling the on-off of an air passage for communicating the pressure reducing chamber with the second quantitative hole. According to the decompression quantitative oxygen generation device, the first quantitative hole and the second quantitative hole are designed, the basic oxygen supply function is achieved when the first quantitative hole and the second quantitative hole output jointly under the normal condition, the second quantitative hole can close oxygen supply output through the needle valve switch under the specific condition, and the function that the oxygen output amount is adjustable is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of mining engineering, in particular to a decompression and metering oxygen generating device. Background Art

[0002] During the process of mine operation, due to complex geological conditions, possible failures of the ventilation system, sudden accidents and other reasons, the quality and oxygen content of the underground air may be severely affected, threatening the lives of underground personnel. In this regard, some oxygen supply and self-rescue equipment will be equipped underground, such as compressed oxygen self-rescue devices. However, the oxygen cylinders store high-pressure gas, and the high-pressure gas needs to be decompressed and then quantitatively output stable and continuous oxygen before being supplied to the human body.

[0003] Industry standards require that under the condition of metered oxygen supply, when the oxygen cylinder pressure is 20 MPa to 3 MPa, the metered oxygen supply should not be less than 2.1 L / min at a breathing volume of 35 L / min, and the metered oxygen supply should not be less than 0.5 L / min at a breathing volume of 10 L / min; under the condition of automatic or manual supplementary oxygen supply, when the oxygen cylinder pressure is 20 MPa to 5 MPa, the oxygen supply should not be less than 65 L / min. Assuming a mine accident occurs, the trapped personnel should sit still and wait for rescue. At this time, the oxygen demand decreases, and the static oxygen supply time of the self-rescue device should not be less than 3 times the rated oxygen supply time to extend the waiting time for rescue as much as possible.

[0004] In this regard, in addition to the decompression requirement, it is also necessary to accurately control the output amount of oxygen. The currently used oxygen generators can meet the basic decompression requirements, but the ability to quantitatively control oxygen is insufficient and needs to be optimized. Content of the Utility Model

[0005] The purpose of the utility model is to provide a decompression and metering oxygen generating device to solve the problems existing in the above background art.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A decompression and metering oxygen generating device includes a generator main body. A high-pressure gas inlet is provided at the first end of the generator main body, and a first metering hole, a second metering hole, a pressure relief hole and a manual air supply hole are provided at the second end of the generator main body;

[0008] A decompression chamber communicated with the high-pressure gas inlet is arranged inside the generator main body. The decompression chamber is used to decompress the compressed oxygen entering from the high-pressure gas inlet to a set value. The first metering hole, the second metering hole, the pressure relief hole and the manual air supply hole are respectively communicated with the decompression chamber through independent air channels;

[0009] A needle valve switch is arranged on the generator main body. The needle valve switch is used to control the on-off of the air channel connecting the decompression chamber and the second metering hole.

[0010] As an alternative, the oxygen output of the second metering orifice is twice that of the first metering orifice, and the oxygen supply amount of the generator main body when the needle valve switch is opened is three times that of the generator main body when the needle valve switch is closed.

[0011] As an alternative, the oxygen output of the first metering orifice is not less than 0.7 L / min, and the oxygen output of the second metering orifice is not less than 1.4 L / min.

[0012] As an alternative, the high-pressure gas inlet is connected to an oxygen cylinder to introduce 20 MPa of compressed oxygen into the generator main body, and the decompression chamber can decompress the 20 MPa of compressed oxygen to less than 1 MPa.

[0013] As an alternative, a pressure relief protection device is installed at the orifice of the pressure relief hole, and the pressure relief protection device is used to automatically open for pressure relief when the pressure value in the decompression chamber is greater than 1 MPa.

[0014] As an alternative, a toggle switch is connected to the orifice of the manual air replenishment hole. When the toggle switch is triggered, the manual air replenishment hole is opened, and the oxygen supply amount of the generator main body is not less than 65 L / min.

[0015] As an alternative, the manual air replenishment hole is located at the center of the second end face of the generator main body, and the first metering orifice, the second metering orifice, and the pressure relief hole are distributed on the outer circle of the manual air replenishment hole.

[0016] As an alternative, a card slot for installing an airbag is provided on the surface of the generator main body, and the first metering orifice, the second metering orifice, the pressure relief hole, and the manual air replenishment hole are all located inside the airbag.

[0017] The beneficial effects of the present utility model: The decompression and metering oxygen generating device of the present utility model is designed with a first metering orifice and a second metering orifice. Under normal circumstances, the first metering orifice and the second metering orifice jointly output to achieve the basic oxygen supply function. In specific circumstances, the second metering orifice can close the oxygen supply output through the needle valve switch to achieve the function of adjustable oxygen output, extend the use time of the self-rescuer, meet the requirements of industry standards, and fully guarantee the personal safety of underground personnel. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the decompression and metering oxygen generating device provided by an embodiment of the present utility model;

[0019] Figure 2 is a schematic diagram of the second end face of the generator main body in the decompression and metering oxygen generating device provided by an embodiment of the present utility model.

[0020] In the drawings:

[0021] 1. Generator main body; 2. High-pressure gas inlet; 3. First metering hole; 4. Second metering hole; 5. Pressure relief hole; 6. Air supply hole; 7. Decompression chamber; 8. Air passage; 9. Needle valve switch; 10. Lever switch; 11. Card slot; 12. Airbag bag. Detailed implementation manners

[0022] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model are shown in the drawings rather than all the structures.

[0023] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0025] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "left", and "right" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0026] Please refer to Figure 1 and Figure 2As shown in the figure, this embodiment provides a decompression and quantitative oxygen generating device, which includes a generator main body 1. A high-pressure gas inlet 2 is provided at the first end of the generator main body 1, and a first quantitative hole 3, a second quantitative hole 4, a pressure relief hole 5, and a manual air replenishment hole 6 are provided at the second end of the generator main body 1;

[0027] Inside the generator main body 1, there is a decompression chamber 7 communicated with the high-pressure gas inlet 2. The decompression chamber 7 is used to decompress the compressed oxygen entering from the high-pressure gas inlet 2 to a set value. The first quantitative hole 3, the second quantitative hole 4, the pressure relief hole 5, and the manual air replenishment hole 6 are respectively communicated with the decompression chamber 7 through independent air ducts 8;

[0028] A needle valve switch 9 is provided on the generator main body 1. The needle valve switch 9 is used to control the on-off of the air duct 8 communicating the decompression chamber 7 with the second quantitative hole 4. Specifically, by rotating the outer handwheel of the needle valve switch 9, the blockage of the air duct 8 communicating the decompression chamber 7 with the second quantitative hole 4 is changed to achieve this. Here, only two states of fully open or fully closed are required.

[0029] Therefore, the decompression and quantitative oxygen generating device is designed with a first quantitative hole 3 and a second quantitative hole 4. Under normal circumstances, when the first quantitative hole 3 and the second quantitative hole 4 output together, the basic oxygen supply function is realized. In specific cases, the second quantitative hole 4 can be closed to stop the oxygen supply output through the needle valve switch 9, realizing the function of adjustable oxygen output, prolonging the use time of the self-rescuer, meeting the requirements of industry standards, and fully ensuring the personal safety of underground personnel.

[0030] Optionally, the oxygen output of the second quantitative hole 4 (theoretically) is 2 times that of the first quantitative hole 3, and the oxygen supply amount of the generator main body 1 when the needle valve switch 9 is opened is 3 times that of the generator main body 1 when the needle valve switch 9 is closed.

[0031] Specifically, here the oxygen output of the first quantitative hole 3 is designed to be greater than or equal to 0.7 L / min, and the oxygen output of the second quantitative hole 4 is greater than or equal to 1.4 L / min. Then, opening the needle valve switch 9 can realize the quantitative oxygen supply function of greater than or equal to 2.1 L / min, meeting the use requirements at a breathing volume of 35 L / min; closing the needle valve switch 9 can realize the quantitative oxygen supply function of greater than or equal to 0.7 L / min, meeting the use requirements at a breathing volume of 10 L / min, and meeting the requirement that the static oxygen supply time of the self-rescuer is not less than 3 times the rated oxygen supply time.

[0032] Optionally, the high-pressure gas inlet 2 is connected to an oxygen cylinder to introduce 20 MPa of compressed oxygen into the generator main body 1. The decompression chamber 7 can decompress 20 MPa of compressed oxygen to below 1 MPa to meet the conventional oxygen supply requirements, and the specific set value can be adjusted as needed.

[0033] Optionally, a pressure relief protection device is installed at the orifice of the pressure relief hole 5. The pressure relief protection device is used to automatically open for pressure relief when the pressure value in the pressure reduction chamber 7 is greater than 1 MPa, ensuring the pressure stability in the pressure reduction chamber 7.

[0034] Optionally, a toggle switch 10 is connected to the orifice of the manual air supply hole 6. When the toggle switch 10 is triggered, the manual air supply hole 6 opens, and the oxygen supply amount of the generator main body 1 is not less than 65 L / min, meeting the requirements of manual supplementary oxygen supply.

[0035] Optionally, the manual air supply hole 6 is located at the center of the end face of the second end of the generator main body 1, and the first metering hole 3, the second metering hole 4, and the pressure relief hole 5 are distributed on the outer circle of the manual air supply hole 6 to optimize the distribution of each air passage 8 in the generator main body 1 and control the volume of the generator main body 1 as much as possible.

[0036] Optionally, a card slot 11 for installing an airbag 12 is provided on the surface of the generator main body 1. The first metering hole 3, the second metering hole 4, the pressure relief hole 5, and the manual air supply hole 6 are all located inside the airbag 12, and a self-rescuer oxygen output interface is provided on the airbag 12.

[0037] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A decompression and quantitative oxygen generation device, characterized in that, It includes a generator body (1), a high-pressure gas inlet (2) is provided at the first end of the generator body (1), and a first metering hole (3), a second metering hole (4), a pressure relief hole (5) and a manual air filling hole (6) are provided at the second end of the generator body (1); A pressure reducing chamber (7) communicated with the high-pressure gas inlet (2) is arranged inside the generator body (1). The pressure reducing chamber (7) is used to reduce the pressure of the compressed oxygen entering from the high-pressure gas inlet (2) to a set value. The first metering hole (3), the second metering hole (4), the pressure relief hole (5) and the manual air filling hole (6) are respectively communicated with the pressure reducing chamber (7) through independent air channels (8); A needle valve switch (9) is arranged on the generator body (1). The needle valve switch (9) is used to control the on-off of the air channel (8) connecting the pressure reducing chamber (7) and the second metering hole (4).

2. The decompression and metered oxygen generation device according to claim 1, wherein, The oxygen output of the second metering hole (4) is twice that of the first metering hole (3), and the oxygen supply amount of the generator body (1) when the needle valve switch (9) is opened is three times that of the generator body (1) when the needle valve switch (9) is closed.

3. The decompression and quantitative oxygen generating device according to claim 2, wherein The oxygen output of the first metering hole (3) is not less than 0.7 L / min, and the oxygen output of the second metering hole (4) is not less than 1.4 L / min.

4. The decompression and metered oxygen generating device according to claim 1, characterized in that, The high-pressure gas inlet (2) is connected to an oxygen cylinder to introduce 20 MPa of compressed oxygen into the generator body (1), and the pressure reducing chamber (7) can reduce the pressure of the 20 MPa compressed oxygen to below 1 MPa.

5. The decompression and metered oxygen generating device according to claim 4, wherein A pressure relief protection device is installed at the orifice of the pressure relief hole (5). The pressure relief protection device is used to automatically open for pressure relief when the pressure value in the pressure reducing chamber (7) is greater than 1 MPa.

6. The decompression and quantitative oxygen generating device according to claim 1, characterized in that, A toggle switch (10) is connected to the orifice of the manual air filling hole (6). When the toggle switch (10) is triggered, the manual air filling hole (6) is opened, and the oxygen supply amount of the generator body (1) is not less than 65 L / min.

7. The decompression and metered oxygen generating device according to claim 1, characterized in that, The manual air filling hole (6) is located at the center of the second end face of the generator body (1), and the first metering hole (3), the second metering hole (4) and the pressure relief hole (5) are distributed on the outer circle of the manual air filling hole (6).

8. The decompression and metered oxygen generating device according to claim 1, characterized in that, A card slot (11) for installing an airbag (12) is arranged on the surface of the generator body (1). The first metering hole (3), the second metering hole (4), the pressure relief hole (5) and the manual air filling hole (6) are all located inside the airbag (12).

Images