Novel safety valve for aviation equipment

Abstract

The utility model discloses a novel safety valve for aviation equipment. The novel safety valve comprises a valve base assembly, a valve shell, an adjusting nut, a spring and a valve clack. The valve base assembly communicates with the interior of the valve shell, and a plurality of through holes are formed in the side wall of the valve shell along the peripheral side. The valve clack is slidably connected with the interior of the valve shell, a limiting protrusion is arranged in the middle of the top of the valve clack, and a mounting cavity is correspondingly formed in the side, close to the valve clack, of the adjusting nut. The top of the valve base assembly is provided with a threaded connection section, and the threaded connection section is sleeved with a valve shell. A valve clack in the valve shell is connected with the threaded connection section in a sealed mode. An air inlet communicated with the interior of the valve base assembly is formed in the free side of the valve base assembly. By means of the modular design of the valve base assembly and the valve shell, valve shells of different models can be flexibly replaced according to the working environment, later maintenance and replacement are facilitated, and good practicability is achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of aviation safety valves, specifically relating to a new type of safety valve for aviation equipment. Background Technology

[0002] Safety valves are frequently used in aviation equipment. For example, in aircraft oxygen systems, oxygen can be released through the venting valve when the system malfunctions or needs maintenance. Similarly, aircraft venting and pressurization systems should be designed with safety pressure relief and pressure regulating devices to prevent damage to the system or fuel tank due to negative or overpressure, while maintaining the fuel tank's pressure relative to the ambient atmosphere during flight to ensure proper fuel pump operation and reduce fuel evaporation losses. Traditional venting and pressurization systems typically use pressure signalers to monitor fuel tank pressure, electromagnetic vent valves for venting and pressure relief, and pilot-operated pressure regulating valves to adjust the bleed air to the specified pressure. Such systems have numerous accessories, consume a large amount of electricity, increase system weight, cost, and failure rate, and reduce system reliability. Utility Model Content

[0003] The purpose of this utility model is to provide a new type of safety valve for aviation equipment. Through the detachable connection of the valve base assembly and the valve housing, it is convenient and flexible to be applied to different working scenarios, facilitates later maintenance and updates, and has good practicality.

[0004] This utility model is mainly achieved through the following technical solutions:

[0005] A novel safety valve for aviation equipment includes a valve base assembly, a valve housing, and an adjusting nut, a spring, and a valve disc arranged sequentially from top to bottom inside the valve housing; the valve base assembly communicates with the interior of the valve housing, and the side wall of the valve housing is provided with several through holes along its circumference.

[0006] The valve disc is slidably connected to the inside of the valve housing, and the adjusting nut is threadedly connected to the inside of the valve housing; a limiting protrusion is provided at the middle of the top of the valve disc, and an installation chamber is provided on the side of the adjusting nut near the valve disc; the bottom of the spring is sleeved on the outside of the limiting protrusion, and the top is embedded in the inside of the installation chamber.

[0007] The valve base assembly has a threaded connection section at its top, and a valve housing is fitted onto the threaded connection section of the valve base assembly; the valve valve disc inside the valve housing is sealed to the threaded connection section of the valve base assembly; and an air inlet communicating with the interior of the valve base assembly is provided on the free side of the valve base assembly.

[0008] To better realize this utility model, the free end of the valve housing is further provided with a plug cap, which is used to limit the adjusting nut; the inner side of the plug cap is provided with a limiting part, which is connected to the internal thread of the valve housing.

[0009] To better realize this utility model, the top of the adjusting nut is further defined as a cylindrical structure.

[0010] To better realize this utility model, the outer side of the threaded connection section of the valve base assembly is further threadedly connected to the valve housing.

[0011] To better realize this utility model, the valve disc is further provided with a planar sealing structure on the side of the valve base assembly corresponding to the threaded connection section, and a sealing ring is provided between the planar sealing structure of the valve disc and the threaded connection section.

[0012] To better realize this utility model, the gap between the valve housing and the valve disc is further 0.05~0.1mm.

[0013] To better realize this utility model, the valve base assembly is further provided with air inlet nozzles on both sides that communicate with its interior. The free end of the air inlet nozzle has a conical structure and a 60° conical surface.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention utilizes a modular design for the valve base assembly and valve housing, allowing for flexible replacement of different models of valve housing or valve base assemblies depending on the working environment, facilitating future maintenance and replacement. The structural design of the adjusting nut and valve disc facilitates the limiting and fixing of the spring, simplifying later positioning and installation. Furthermore, the adjusting nut allows for flexible adjustment of the spring's resistance to the valve disc, thereby flexibly adjusting the pressure regulation and pressure relief sensitivity of the safety valve, demonstrating good practicality.

[0016] This invention features high reliability, with a start-up pressure repeatability error of ≤±2%; rapid response, a fully open structure, and a pressure relief efficiency of ≥90%; extended service life, with the spring and sealing gasket having passed over 50,000 cycle tests; modular design for convenient maintenance; and wide adaptability, suitable for various assembly methods, with diverse interfaces to meet user needs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the type A safety valve in Example 1;

[0018] Figure 2 This is a schematic diagram of the structure of the type B safety valve in Example 2;

[0019] Figure 3 This is a schematic diagram of the structure of the C-type safety valve in Example 3.

[0020] Among them: 1-Type A valve base assembly, 2-Valve housing, 3-Valve valve disc, 4-Spring, 5-Adjusting nut, 6-Plug cap, 7-Type B valve base assembly, 8-Type C valve base assembly. Detailed Implementation

[0021] Example 1:

[0022] A new type of safety valve for aviation equipment, such as Figure 1 As shown, it is designed as a type A valve, including a type A valve base assembly 1, a valve housing 2, an adjusting nut 5, a spring 4, and a valve disc 3.

[0023] The type A valve base assembly 1 can be designed with various interfaces to meet different user needs;

[0024] The valve housing 2 is designed with a streamlined shape to reduce fluid resistance;

[0025] The valve disc 3 is designed as a planar sealing structure;

[0026] The adjusting nut 5 is used for manual calibration of the start-up pressure and has a built-in mounting chamber for mounting the spring 4;

[0027] The plug 6 is threadedly connected to the valve housing 2 to prevent the adjusting nut 5 from being moved arbitrarily;

[0028] The spring 4 is made of high-precision spring steel, achieving a fatigue-resistant design.

[0029] Preferably, the A-type valve base assembly 1 has air inlet nozzles on both sides that communicate with its interior, and a valve housing 2 is threadedly installed on the inner and outer sides of the A-type valve base assembly 1. The A-type valve base assembly 1 communicates with the interior of the valve housing 2, and the side wall of the valve housing 2 has several through holes arranged circumferentially.

[0030] The valve housing 2 is provided with an adjusting nut 5, a spring 4, and a valve disc 3 arranged sequentially from top to bottom inside. The valve housing 2 and the valve disc 3 are slidably connected, and the valve housing 2 and the adjusting nut 5 are threadedly connected. A limiting protrusion is provided in the middle of the top of the valve disc 3. The adjusting nut 5 is provided with a corresponding mounting chamber on the side near the valve disc 3. The bottom of the spring 4 is sleeved on the outside of the limiting protrusion, and the top is embedded in the mounting chamber.

[0031] The valve disc 3 is provided with a planar sealing structure on the top of the type A valve base assembly 1, and a sealing ring is provided between the planar sealing structure and the top of the type A valve base assembly 1.

[0032] Preferably, the free end of the air inlet nozzle has a conical structure with a 60° conical surface and an end surface roughness of 0.4. The sealing ring is used to ensure that the end face runout of the valve disc 3 is ≤0.01mm. Preferably, the gap between the valve housing 2 and the valve disc 3 is 0.05~0.1mm to ensure flexible movement.

[0033] Specifically, the design parameters are as follows:

[0034] Design pressure (MPa): 0.05~3.5MPa;

[0035] Start-up pressure setpoint (MPa): User-defined error: Calibration value ±2%;

[0036] Applicable temperature (°C): -30°C to 50°C;

[0037] Medium: Gas;

[0038] Flow rate / diameter: DN20.

[0039] Specifically, the type A valve base assembly 1 and valve housing 2 serve as the pressure-bearing body, providing a flow channel for the medium (gas). The material of the type A valve base assembly 1 is 1Cr18Ni9Ti / passivated; the material of the valve housing 2 (0.05MPa~) is 6061-T651 / sulfuric acid anodized; the material of the valve housing 2 (0.05MPa~3.5MPa) is 1Cr18Ni9Ti / passivated.

[0040] The valve disc 3, spring 4, and adjusting nut 5 together form a sealing core, resistant to erosion; they provide preload and control the opening pressure. The A-type valve base assembly 1 is made of 6061-T651 / sulfuric acid anodizing / sulfurization material; the spring 4 is made of 60Si2MnA (high-temperature spring 4 steel); and the adjusting nut 5 is made of 6061-T651 / sulfuric acid anodizing material.

[0041] The plug 6 is used to prevent the adjusting nut 5 from being moved arbitrarily and to prevent dust. The plug 6 is made of 6061-T951 / sulfuric acid anodized material.

[0042] In use, firstly, the valve housing 2 is threaded onto the top of the A-type valve base assembly 1. Then, one end of the spring 4 is inserted into the limiting protrusion of the valve disc 3 and slidably installed into the valve housing 2. The adjusting nut 5 is threaded into the inside of the valve housing 2, causing it to press against the spring 4, thus pre-tightening the valve disc 3. This invention allows for adjustment of pressure regulation or pressure relief sensitivity via the adjusting nut 5. Finally, a plug 6 is installed on the top of the valve housing 2.

[0043] When air pressure enters the valve housing 2 through the air inlet of the A-type valve base assembly 1, it presses against the valve disc 3, overcoming the elastic force of the spring 4, causing the valve disc 3 to slide upward along the inside of the valve housing 2, thereby releasing the air pressure through the through hole. When the valve disc 3 slides within a small range, it can achieve pressure regulation. When the valve disc 3 slides upward and the through hole is fully connected to the A-type valve base assembly 1, it achieves pressure relief.

[0044] Example 2:

[0045] A new type of safety valve for aviation equipment, such as Figure 2 As shown, the design is of type B, including a type B valve base assembly 7, a valve housing 2, and an adjusting nut 5, a spring 4, and a valve disc 3 arranged sequentially from top to bottom inside the valve housing 2; the type B valve base assembly 7 is connected to the interior of the valve housing 2, and the side wall of the valve housing 2 is provided with several through holes along the periphery.

[0046] The valve disc 3 is slidably connected to the valve housing 2. A limiting protrusion is provided at the center of the top of the valve disc 3. An installation chamber is provided on the side of the adjusting nut 5 near the valve disc 3. The bottom of the spring 4 is sleeved on the outside of the limiting protrusion, and the top is embedded in the installation chamber.

[0047] The type B valve base assembly 7 has a hollow structure and a threaded connection section at the top. A valve housing 2 is threadedly installed on the outer side of the threaded connection section of the type B valve base assembly 7. The valve valve disc 3 inside the valve housing 2 is sealed to the threaded connection section of the type B valve base assembly 7. An air inlet communicating with the interior is provided on the free side of the type B valve base assembly 7.

[0048] Preferably, a plug 6 is provided at the free end of the valve housing 2, and the plug 6 is used to limit the adjusting nut 5; a limiting part is provided on the inner side of the plug 6, and the limiting part of the plug 6 is threadedly connected to the inside of the valve housing 2. A planar sealing structure is provided on the side of the valve disc 3 near the valve base assembly corresponding to the threaded connection section, and a sealing ring is provided between the planar sealing structure of the valve disc 3 and the threaded connection section.

[0049] This invention utilizes a modular design between the B-type valve base assembly 7 and the valve housing 2. Different models of the valve housing 2 and the internal adjustment mechanisms (adjusting nut 5, spring 4, and valve disc 3) can be flexibly replaced according to the working environment, facilitating future maintenance and replacement. The structural design of the adjusting nut 5 and valve disc 3 facilitates the limiting and fixing of the spring 4, simplifying later positioning and installation. Furthermore, the adjusting nut 5 allows for flexible adjustment of the pressure resistance of the spring 4 against the valve disc 3, thereby flexibly adjusting the pressure regulation and pressure relief sensitivity of the safety valve, demonstrating good practicality.

[0050] Example 3:

[0051] This embodiment is an optimization based on embodiment 2, such as... Figure 3 As shown, it is designed in a C-shape and includes a C-shaped valve base assembly 8. The side wall of the C-shaped valve base assembly 8 is provided with a hexagonal end face to facilitate subsequent disassembly using tools.

[0052] The other parts of this embodiment are the same as those in Embodiment 2, so they will not be described again.

[0053] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A new type of safety shutter for aircraft equipment, characterized in that, The valve seat assembly, the valve housing (2) and the adjusting nut (5), the spring (4) and the valve disc (3) arranged in the valve housing (2) from top to bottom are included; the valve seat assembly is communicated with the inside of the valve housing (2), and the side wall of the valve housing (2) is provided with a plurality of through holes along the circumferential side; The valve disc (3) is slidably connected with the inside of the valve housing (2), and the adjusting nut (5) is threadedly connected with the inside of the valve housing (2); the middle part of the top of the valve disc (3) is provided with a limiting protrusion, and the side of the adjusting nut (5) close to the valve disc (3) is correspondingly provided with a mounting chamber, and the bottom of the spring (4) is sleeved and mounted on the outside of the limiting protrusion, and the top is embedded and mounted in the inside of the mounting chamber; The top of the valve seat assembly is provided with a threaded connection section, and the valve housing (2) is sleeved and mounted on the threaded connection section of the valve seat assembly; the valve disc (3) in the inside of the valve housing (2) is sealingly connected with the threaded connection section of the valve seat assembly; the free side of the valve seat assembly is provided with an air inlet communicated with the inside thereof.

2. A new type of safety door for aircraft equipment according to claim 1, characterized in that, The free end of the valve housing (2) is provided with a plug cap (6), and the plug cap (6) is used for limiting the adjusting nut (5); the inside of the plug cap (6) is provided with a limiting portion, and the limiting portion of the plug cap (6) is threadedly connected with the inside of the valve housing (2).

3. A new type of safety door for aircraft equipment according to claim 1 or 2, characterized in that, The top of the adjusting nut (5) is a cylindrical structure.

4. A new type of safety door for aircraft equipment according to claim 1, characterized in that, The outside of the threaded connection section of the valve seat assembly is threadedly connected with the valve housing (2).

5. A new type of safety door for aircraft equipment according to claim 1, characterized in that, The side of the valve disc (3) close to the valve seat assembly is provided with a plane sealing structure corresponding to the threaded connection section, and a sealing ring is arranged between the plane sealing structure of the valve disc (3) and the threaded connection section.

6. A new type of safety door for aircraft equipment according to claim 1 or 5, characterized in that, The gap between the valve housing (2) and the valve disc (3) is 0.05-0.1mm.

7. A new type of safety door for aircraft equipment according to claim 1, characterized in that, The two sides of the valve seat assembly are respectively provided with air inlet connectors communicated with the inside thereof, the free end of the air inlet connector is a tapered structure, and the taper angle is 60°.

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