Miniature oxygenation valve

Abstract

The utility model belongs to the one -way oxygenation field in civil aircraft crew oxygen equipment system, concretely relates to a kind of micro oxygenation valve. Include: stop cap assembly (1), upper shell (3), valve core (5), lower shell (6), wherein, upper shell (3) one end is connected with lower shell (6) inside and forms cavity, valve core (5) is arranged in the cavity inside lower shell (6), and valve core (5) is connected with lower shell (6) cavity inner wall by screw thread, stop cap assembly (1) is connected with the other end of upper shell (3) by screw thread, use valve core (5) as internal valve, valve one-way opens when oxygenation, and valve is automatically closed when not working.

Description

Technical Field

[0001] This utility model belongs to the field of unidirectional oxygenation in the oxygen equipment system of civil aircraft crews, and specifically relates to a miniature oxygenation valve. Background Technology

[0002] Currently, the oxygen filling equipment used in the oxygen systems of domestic civil aircraft crews is a one-way valve structure. This structure is large in size and heavy in weight, has poor reverse sealing performance and lifespan, affects the aircraft's weight design, and results in high aircraft maintenance costs.

[0003] From the perspective of the overall development technology of oxygenation equipment, technological breakthroughs are needed in the valve structure of the equipment, including weight reduction design and improved reverse sealing performance. Utility Model Content

[0004] Purpose of the utility model: To propose a miniature oxygen filling valve device to meet the requirements of civil aircraft ground crew for filling oxygen cylinders on the ground.

[0005] Technical solution: A miniature oxygen-filling valve includes: a plug assembly 1, an upper housing 3, a valve core 5, and a lower housing 6. One end of the upper housing 3 is connected to the lower housing 6 to form a cavity. The valve core 5 is disposed in the cavity inside the lower housing 6 and is threadedly connected to the inner wall of the cavity of the lower housing 6. The plug assembly 1 is threadedly connected to the other end of the upper housing 3. The valve core 5 is used as an internal valve. When oxygen is being filled, the valve opens in one direction and closes automatically when not in use.

[0006] Furthermore, the valve core 5 uses a spring to achieve forward opening and reverse sealing functions.

[0007] Furthermore, the valve core 5 includes: a core rod 51, a core cap 52, a core spring 53, a core body 54, a sealing gasket 56, and a core seat 57. The core cap 52 is connected to one end of the core body 54 to form a cavity. The core rod 51 passes through the core cap 52 and the core body 54 in sequence and is connected to the core seat 57. The core spring 53 is disposed on the core rod 51, and the two ends of the core spring 53 abut against the upper end of the core rod 51 and the lower end of the core body 54, respectively. The core rod 51 is provided with an annular boss, which is pressed against the sealing gasket 56 disposed on the core seat 57.

[0008] Furthermore, the upper housing 3 and the lower housing 6 are sealed by a sealing ring 4.

[0009] Furthermore, one end of the upper housing 3 is connected to the lower housing 6 by a thread.

[0010] Furthermore, the valve core 5 is provided with a sealing ring 55 to seal with the housing 6.

[0011] Beneficial effects: The miniature oxygen-filling valve device provided by this utility model has the characteristics of small size, light weight, and good reverse sealing performance. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a miniature oxygen-filling valve structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the valve core structure; Figure 3 Diagram showing the valve core in open and closed states; The components are as follows: 1-Plug assembly; 2-Filter screen; 3-Upper housing; 4-Sealing ring; 5-Valve core; 6-Lower housing; 51-Core rod; 52-Core cap; 53-Core spring; 54-Core body; 55-Sealing ring; 56-Sealing gasket; 57-Core seat. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0014] In the description of this utility model, it should be understood that the terms "center", "axial", "vertical", "upper", "lower", "upper end", "bottom end", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0015] The present invention will now be described in further detail. See below. Figure 1An oxygen filling device for ground crew of civil aircraft to replenish oxygen cylinders on the ground includes: a cap assembly 1, a filter screen 2, an upper housing 3, a sealing ring 4, a valve core 5, and a lower housing 6. A miniature oxygen filling valve core is used as an internal valve; the valve opens in one direction during oxygen filling and automatically closes when not in use. The upper housing 3 and lower housing 6 are connected by threads and sealed together by the sealing ring 4. The valve core 5 is also connected to the lower housing 6 by threads, and a rubber ring is installed on the surface of the valve core to seal against the interior of the housing. The cap assembly 1 is connected to the upper housing 3 by threads. The valve core 5 has an internal spring that enables forward opening and reverse sealing.

[0016] The working principle of this invention is as follows: When the system is oxygenated, oxygen from the oxygenation station passes through the filter screen 2 and the internal pores of the valve core assembly 5, applying oxygen pressure to the valve core assembly. This pressure overcomes the pressure of the internal spring, keeping the valve inside the valve core assembly in the open state until the pressure on both sides of the valve is balanced, meaning the gas cylinder of the system is full. After the pressure is balanced, the spring inside the valve core assembly pushes the lifting valve against the valve seat of the valve core assembly.

[0017] The structure of valve core 5 is shown below. Figure 2 The valve core 5 includes: a core rod 51, a core cap 52, a core spring 53, a core body 54, a sealing gasket 56, and a core seat 57. The core cap 52 connects to one end of the core body 54, forming an internal cavity. The core rod 51 passes through the core cap 52 and the core body 54 sequentially before connecting to the core seat 57. The core spring 53 is mounted on the core rod 51, with its two ends abutting against the upper end of the core rod 51 and the lower end of the core body 54, respectively. An annular boss is provided on the core rod 51, which presses against the sealing gasket 56 on the core seat 57. The valve core 5 is equipped with a sealing ring 55 to seal against the housing 6.

[0018] When oxygen is introduced into the oxygen inlet, the core rod 51 applies force to the sealing gasket 56, causing the core body 54 to detach from the sealing gasket 56, allowing gas to enter. When oxygen filling ends, under the restoring force of the core spring 53 and the internal oxygen pressure, the core body 54 and the sealing gasket 56 are pressed together to maintain an airtight seal. See the diagram for the valve core's open and closed states. Figure 3 .

[0019] After oxygenation is complete, disconnect the hose and connector of the oxygenation station. The spring inside the valve core assembly will lift the valve to the valve seat inside the valve core assembly, preventing oxygen from leaking out of the oxygen cylinder and pipeline. After disconnecting the oxygenation hose and connector, connect the plug cap 1 to the upper housing 3 to protect the oxygenation valve from dust. The plug cap is also equipped with a chain to prevent the outer cover nut from being lost.

[0020] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A miniature oxygen-filling valve, characterized in that, include: The assembly consists of a plug (1), an upper housing (3), a valve core (5), and a lower housing (6). One end of the upper housing (3) is connected to the lower housing (6) to form a cavity. The valve core (5) is located in the cavity inside the lower housing (6) and is connected to the inner wall of the cavity of the lower housing (6) by a thread. The other end of the plug assembly (1) is connected to the upper housing (3) by a thread. The valve core (5) is used as an internal valve. When oxygen is supplied, the valve opens in one direction. When not in operation, the valve closes automatically.

2. The miniature oxygen-filling valve according to claim 1, characterized in that, The valve core (5) is opened in the forward direction and sealed in the reverse direction by means of a spring.

3. The miniature oxygen-filling valve according to claim 2, characterized in that, The valve core (5) includes: core rod (51), core cap (52), core spring (53), core body (54), sealing gasket (56), and core seat (57). The core cap (52) is connected to one end of the core body (54) to form a cavity. The core rod (51) passes through the core cap (52) and the core body (54) in sequence and is connected to the core seat (57). The core spring (53) is set on the core rod (51). The two ends of the core spring (53) abut against the upper end of the core rod (51) and the lower end of the core body (54) respectively. The core rod (51) is provided with an annular boss, which is pressed against the sealing gasket (56) provided on the core seat (57).

4. The miniature oxygen-filling valve according to claim 3, characterized in that, The upper housing (3) and the lower housing (6) are sealed by a sealing ring (4).

5. The miniature oxygen-filling valve according to claim 4, characterized in that, One end of the upper housing (3) is connected to the lower housing (6) by a thread.

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