An air supply valve for a closed-circuit diving breathing apparatus

Abstract

This utility model discloses an air supply valve for a closed-circuit diving respirator, comprising: a valve seat, a housing fixedly connected to the outer surface of the valve seat, a valve cover fixedly connected to the upper surface of the housing by a locking nut, a diaphragm disposed between the valve cover and the housing, a button installed on the inner wall of the valve cover, the button being positioned above the diaphragm, a valve body fixedly connected to the inside of the housing by a locking nut, a valve stem installed on the inner wall of the valve body, a spring disposed on the outer surface of the valve stem, a lever hinged to one end of the valve stem, the lever being positioned below the diaphragm, capable of automatically supplying gas according to pressure changes, and allowing manual control of the gas supply when the gas supply is insufficient to quickly replenish the gas and avoid the risk of oxygen deprivation for divers.

Description

Technical Field

[0001] This utility model relates to the field of closed-loop diving breathing apparatus technology, and in particular to an air supply valve for closed-loop diving breathing apparatus. Background Technology

[0002] A closed-circuit breathing apparatus (CBBA) is a diving device that recycles breathing gas, extending dive time. The air supply valve is a key component of a CBBA, providing a sufficient amount of breathing gas based on the diver's gas needs and dive depth. However, current air supply valves on the market only supply gas according to changes in ambient pressure. When a diver descends rapidly, the automatic air supply from the valve may not meet their immediate needs, forcing the diver to wait and increasing the risk of oxygen deprivation. Utility Model Content

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide an air supply valve for a closed-loop diving respirator, which solves the problem that the automatic air supply cannot meet the current needs of the diver after a rapid descent.

[0004] This utility model also provides an air supply valve for a closed-circuit diving respirator, comprising: a valve seat, a housing fixedly connected to the outer surface of the valve seat, a valve cover fixedly connected to the upper surface of the housing by a locking nut, a diaphragm disposed between the valve cover and the housing, a button installed on the inner wall of the valve cover, the button being positioned above the diaphragm, a valve body fixedly connected to the inside of the housing by a stop nut, a valve stem installed on the inner wall of the valve body, a spring disposed on the outer surface of the valve stem, a lever hinged to one end of the valve stem, the lever being positioned below the diaphragm, capable of automatically supplying gas according to pressure changes, and allowing manual control of the gas supply when the gas supply is insufficient to quickly replenish the gas and avoid the risk of oxygen deficiency for the diver.

[0005] According to the present invention, an air supply valve for a closed-circuit diving respirator is provided, wherein the valve seat is located inside the valve body, and one end of the valve stem abuts against the valve seat. The valve stem directly abuts against the valve seat, thereby shortening the gas supply delay and improving the air supply response speed.

[0006] According to the present invention, an air supply valve for a closed-circuit diving respirator is provided, wherein the outer surface of the lever is rotatably connected to the valve body, the diaphragm is positioned between the lever and the button, and the button design facilitates manual intervention by the diver, enhancing human-computer interaction.

[0007] According to the present invention, an air supply valve for a closed-circuit diving respirator is provided, wherein the diaphragm and lever are located inside the housing, and the housing encapsulates and protects the core components from being jammed by foreign objects, thereby improving reliability.

[0008] Beneficial effects:

[0009] The air supply valve for closed-circuit diving breathing apparatus in this technical solution can automatically supply gas according to pressure changes. When the air supply is insufficient, the air supply can be manually controlled to quickly replenish the gas and avoid the risk of oxygen deficiency for divers. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0011] Figure 1 This is an overall structural diagram of the air supply valve for a closed-loop diving respirator according to this utility model.

[0012] Legend:

[0013] 1. Valve seat; 2. Housing; 3. Valve body; 4. Diaphragm; 5. Valve cover; 6. Button; 7. Valve stem; 8. Lever; 9. Spring. Detailed Implementation

[0014] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the description of the textual part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0015] Reference Figure 1This utility model discloses an air supply valve for a closed-circuit diving respirator, comprising: a valve seat 1, which engages with the end of a valve stem 7, allowing gas to flow out when the valve stem 7 is pushed open and preventing gas flow when the valve stem 7 is reset; a housing 2 is fixedly connected to the outer surface of the valve seat 1, encapsulating the components to prevent seawater corrosion and mechanical damage, while maintaining airtightness; a valve cover 5 is fixedly connected to the upper surface of the housing 2 by a locking nut, sealing the upper part of the housing 2 and also serving as the mounting point for a diaphragm 4 and a button 6; a diaphragm 4 is disposed between the valve cover 5 and the housing 2, sensing pressure changes and driving a lever 8 to move; when the diver inhales and generates negative pressure, the diaphragm 4 sinks, pushing the lever 8; a button 6 is installed on the inner wall of the valve cover 5, allowing manual intervention of the air supply; pressing the button directly compresses the diaphragm 4; the button 6 is located above the diaphragm 4; and a stop nut is installed inside the housing 2. A valve body 3 is fixedly connected, and its internal cavity accommodates a valve seat 1, a valve stem 7, etc., while allowing gas to pass through. The valve stem 7 is installed on the inner wall of the valve body 3 and moves linearly when driven by a lever 8. A spring 9 is provided on the outer surface of the valve stem 7 to provide a restoring force and assist in closing the valve. When the diaphragm 4 rebounds or the button 6 is released, the spring 9 pushes the valve stem 7 to reset, ensuring that the valve closes in time. One end of the valve stem 7 is hinged to a lever 8, which, with the fulcrum as the center, converts the downward movement of the diaphragm 4 into the pushing action of the valve stem 7, realizing the opening and closing control of the valve. The lever 8 is located below the diaphragm 4, the valve seat 1 is located inside the valve body 3, one end of the valve stem 7 abuts against the valve seat 1, the outer surface of the lever 8 is rotatably connected to the valve body 3, the diaphragm 4 is located between the lever 8 and the button 6, and the diaphragm 4 and the lever 8 are located inside the housing 2.

[0016] Specifically, breathing creates negative pressure inside the air supply valve. This negative pressure causes the diaphragm 4 to sink, pressing down the lever 8, which in turn pushes open the valve stem 7, opening the valve seat 1 and allowing airflow to escape. When the automatic opening of the valve is insufficient to meet the air supply demand, pressing the button 6 forces the diaphragm 4 to sink, pressing down the lever 8, widening the valve opening, and increasing the air supply to meet the demand.

[0017] Working principle: When a diver inhales, causing negative pressure to be generated inside the automatic air supply valve, the diaphragm 4 sinks down, pressing down the lever 8, which in turn pushes open the valve stem 7, opening the valve seat 1. At this time, gas flows out from the valve port. When the automatic opening degree of the valve is insufficient to meet the air supply demand, the button 6 is pressed, forcing the diaphragm 4 to sink down, pressing down the lever 8, widening the valve opening degree, and increasing the air supply to meet the demand. When the button 6 is stopped and the pressure inside and outside the valve is balanced, the diaphragm 4 rebounds, and the valve stem 7 returns to its original position under the action of the spring 9, closing the valve.

[0018] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An air supply valve for a closed-circuit diving respirator, characterized in that, include: A valve seat (1) is fixedly connected to a housing (2) on its outer surface. A valve cover (5) is fixedly connected to the upper surface of the housing (2) by a locking nut. A diaphragm (4) is provided between the valve cover (5) and the housing (2). A button (6) is installed on the inner wall of the valve cover (5). The button (6) is located above the diaphragm (4). A valve body (3) is fixedly connected to the inside of the housing (2) by a stop nut. A valve stem (7) is installed on the inner wall of the valve body (3). A spring (9) is provided on the outer surface of the valve stem (7). A lever (8) is hinged to one end of the valve stem (7). The lever (8) is located below the diaphragm (4).

2. The air supply valve for a closed-circuit diving respirator according to claim 1, characterized in that, The valve seat (1) is located inside the valve body (3), and one end of the valve stem (7) abuts against the valve seat (1).

3. The air supply valve for a closed-circuit diving respirator according to claim 1, characterized in that, The outer surface of the lever (8) is rotatably connected to the valve body (3), and the diaphragm (4) is located between the lever (8) and the button (6).

4. The air supply valve for a closed-circuit diving respirator according to claim 1, characterized in that, The diaphragm (4) and lever (8) are located inside the housing (2).

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