Double one-way valve with damping and fixing functions for helicopter
By designing a dual check valve with vibration damping and fixing functions, and using a T-shaped structure and vibration damper to isolate vibration, the problem of vibration transmission in the fire extinguishing system is solved, fluid flow direction control and system simplification are achieved, and system reliability and maintainability are improved.
Patent Information
- Application Number
- CN202520627917.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-04-03
AI Technical Summary
In traditional helicopter firefighting systems, the rigid connection between the fire extinguishing pipeline and the firewall leads to vibration transmission, affecting the system's lifespan. In addition, the system has a large number of parts, is heavy, and has poor reliability and maintainability.
Design a double check valve with vibration damping and fixing function. It adopts a T-shaped structure composed of valve body, anti-leakage pad, spring, baffle and vibration damper. The vibration damper isolates vibration and realizes fluid flow direction control and fixing function.
It effectively reduces the transmission of fluid vibration to the machine body, simplifies the system structure, improves maintainability, reduces costs, and optimizes the system configuration.
Smart Images
Figure CN223806660U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of helicopter temperature control system, especially relates to a double check valve with vibration reduction and fixing function for helicopter. BACKGROUND
[0002] The fire extinguishing system is one of important systems of the helicopter, and is related to the normal operation of the helicopter. In order to meet the cross redundancy fire extinguishing requirement of the fire extinguishing system, the double check valve is arranged in the middle of the fire extinguishing pipeline to realize the cross fire extinguishing of the fire extinguishing system. In the conventional design, the fire extinguishing bottle is installed at the rear part of the engine cabin and is far away from the engine cabin, and the engine cabin is extinguished by the fire extinguishing pipeline joint through the double check valve cross parallel connection and passing through the engine cabin firewall. The installation mode is rigid connection between the fire extinguishing pipeline and the firewall, and the vibration of the machine body is directly transmitted to the fire extinguishing pipeline, which affects the service life of the fire extinguishing system under the long-term vibration effect. At the same time, the traditional design needs the double check valve and the fire extinguishing pipeline joint to bear the pipeline cross parallel connection and the fixing function respectively, which leads to many system parts, large system weight, poor reliability and maintenance. SUMMARY
[0003] The utility model discloses a double check valve with vibration reduction and fixing function for helicopter, which meets the requirements of pipeline cross parallel connection, fixing and vibration isolation.
[0004] TECHNICAL SCHEME
[0005] A double check valve with vibration reduction and fixing function for helicopter, the double check valve comprises a valve body, a leak-proof pad, a spring, a baffle and a shock absorber.
[0006] The valve body is T-shaped and is composed of a horizontal pipe and a vertical pipe which are in communication with each other.
[0007] The horizontal pipe is provided with an annular groove in the middle part, and the length of the annular groove is greater than the diameter of the vertical pipe.
[0008] The left baffle, the spring and the right baffle are arranged in the annular groove of the horizontal pipe along the diameter direction.
[0009] The leak-proof pad is arranged between the left and right baffles and the side wall of the annular groove.
[0010] The shock absorber shell is connected to the outer side wall of the vertical pipe, and the shock absorber is arranged between the shock absorber shell and the outer side wall of the vertical pipe.
[0011] Further, the valve body is made of metal material and comprises two half valve bodies which are symmetrically arranged along the plane of the valve body passage axis, the contact surface of the two half valve bodies is fixed by adhesion, and the contact edge of the outer wall surface of the half valve body is welded.
[0012] Further, the leak-proof pad is made of rubber material and comprises two half annular structures which are fixed by adhesion with the two half valve bodies respectively.
[0013] Further, the spring and the left and right baffles are made of the same metal material, and the two ends of the spring are welded with the left and right baffles respectively.
[0014] Further, the valve body and the damper are provided with mounting holes for mounting the double one-way valve on the machine body, and the damper is made of rubber material and is divided into blocks around the mounting hole position.
[0015] Further, the damper is in the shape of a straw hat with a through hole in the middle, and the number of damper blocks is 2-4.
[0016] The utility model is installed in the helicopter fire extinguishing system, satisfies the requirement of fire extinguishing pipeline cross parallel, fixed and vibration isolation, has the following effect:
[0017] a) Control fluid flow function. When fluid flows from one of the inlets, the fluid is controlled to flow out of the outlet by the fluid impact force, and due to the existence of the anti-leak pad, the fluid will not overflow from the other inlet.
[0018] b) Simple structure and reliable effect. The utility model is a mechanical mechanism, which not only has a simple structure, but also can effectively realize cross fire extinguishing of the fire extinguishing system, can bear the fixing function of the fire extinguishing pipeline joint, improve the maintainability of the system, can also reduce the cost and optimize the system structure.
[0019] c) Vibration reduction and isolation function. The utility model adopts damping installation, which can effectively reduce the impact force generated by fluid flow to the machine body, and also effectively reduce the vibration of the machine body to the double one-way valve and the fire extinguishing pipeline, reduce the influence of machine body vibration on the service life of the double one-way valve and the fire extinguishing pipeline. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is the outline drawing of the double one-way valve;
[0021] Figure 2 It is the damper block schematic diagram;
[0022] Figure 3 It is the detailed structure schematic diagram of the double one-way valve of the utility model;
[0023] Figure 4 It is the working principle schematic diagram of the emergency bypass air inlet mechanism of the utility model;
[0024] 1-valve body, 2-anti-leak pad, 3-spring, 4-baffle, 5-damper. DETAILED DESCRIPTION
[0025] In order to make the person skilled in the art better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.
[0026] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.
[0027] In addition, the terms "mount", "set", "provided with", "connect", "connect", "socket" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication between two devices, elements or components. For the person skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0028] A helicopter has a double check valve with damping fixing function, comprising a valve body 1, a leak-proof pad 2, a spring 3, a baffle 4 and a damper 5; a port and b port are inlets, and c port is an outlet. When fluid enters from a port, the fluid impacts the baffle 4 close to the a port, compresses the spring 3, and the fluid flows out from the c port. Due to the presence of the leak-proof pad 2 at the b port, the fluid cannot flow out from the b port. Similarly, when fluid enters from the b port, the fluid impacts the baffle 4 close to the b port, compresses the spring 3, and the fluid flows out from the c port. Due to the presence of the leak-proof pad 2 at the a port, the fluid cannot flow out from the a port. Through the damping effect of the damper 5, the impact force generated by the fluid flow is transmitted to the machine body, and the influence of the machine body vibration on the double check valve is also reduced.
[0029] The valve body 1 adopts metal material, the valve body 1 includes fluid passage pipeline and shock absorber shell, is two half valve bodies that are symmetrically arranged along the plane of valve body passage axis, after completing the installation of anti-leak pad 2, spring 3 and baffle 4, the contact surface of two half valve bodies is fixed by bonding, the contact edge of half valve body outer wall surface is welded, and the welded surface is polished smooth, the anti-leak pad 2 is arranged at the inner wall of the valve body 1 at both ends, the anti-leak pad 2 is made of rubber material and is composed of two half ring structures, the two half ring structures are fixed by bonding with the two half valve bodies respectively, the two half ring structures are fixed by bonding with the two half valve bodies to form a ring-shaped anti-leak pad 2, the spring 3 and the baffle 4 are made of the same metal material, the two ends of the spring 3 are welded with the baffle 4 respectively, after welding, the baffle 4 at the two ends of the spring 3 should be parallel, the shock absorber 5 is made of rubber material, in order to ensure installation, the shock absorber 5 is divided into blocks around the shaft to avoid the installation hole position, and the number of blocks is 2-4.
[0030] Further, the fluid passage pipeline and the shock absorber shell are connected by welding, and the welded surface is polished smooth.
[0031] Further, the valve body 1 and the shock absorber 5 are provided with mounting holes correspondingly, for mounting the double one-way valve on the machine body.
[0032] Further, the stroke of the spring 3 and the baffle 4 is reserved with sufficient spring compression space.
[0033] Further, after the spring 3 and the baffle 4 are installed, the spring is in a slightly compressed state.
[0034] Further, the shock absorber 5 is designed as a shock absorber with an inclined arc surface, which can effectively reduce the influence of vibration in each direction.
[0035] Further, the shock absorber 5 is closely combined with the outer surface of the valve body passage and the inner surface of the shock absorber shell.
[0036] Further, the shock absorber 5 should be divided into blocks as evenly as possible, the number of blocks should not exceed 4 to ensure the damping effect, and mounting holes are arranged on each block.
[0037] The appearance and detailed structure of the utility model are shown in Figure 3 、 4 . The inlet a and the inlet b are inlets, the outlet c is an outlet, when fluid enters from the inlet a, the fluid impacts the baffle 4 close to the inlet a, and the spring 3 is compressed, the fluid flows out from the outlet c, and due to the existence of the anti-leak pad 2 at the inlet b, the fluid cannot flow out from the inlet b, and the fluid flows out from the outlet c, and due to the existence of the anti-leak pad 2 at the inlet a, the fluid cannot flow out from the inlet a, through the damping effect of the shock absorber 5, the impact force generated by fluid flow is transmitted to the machine body, and the influence of the vibration of the machine body on the double one-way valve is also reduced.
[0038] The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. Double check valve with damping fixing function for helicopters, characterized by the fact that: The double one-way valve comprises a valve body, a leak-proof pad, a spring, a baffle and a damper; The valve body is T-shaped and comprises a horizontal pipe and a vertical pipe which are in communication with each other; An annular groove is arranged in the middle of the horizontal pipe, and the length of the annular groove is greater than the diameter of the vertical pipe; A left baffle, a spring and a right baffle are arranged in the annular groove of the horizontal pipe in the diametric direction; The left and right baffles are provided with leak-proof pads between the baffles and the side walls of the annular groove; A damper housing is connected to the outer side wall of the vertical pipe, and a damper is arranged between the damper housing and the outer side wall of the vertical pipe.
2. The dual check valve of claim 1, wherein: The valve body is made of metal and comprises two half valve bodies which are symmetrically arranged along the plane where the axis of the valve body passage is located, the contact surfaces of the two half valve bodies are fixed by bonding, and the contact edges of the outer wall surfaces of the half valve bodies are welded.
3. The dual check valve of claim 2, wherein: The leak-proof pad is made of rubber and comprises two half annular structures which are bonded and fixed with the two half valve bodies respectively.
4. The dual check valve of claim 3, wherein: The spring and the left and right baffles are made of the same metal material, and the two ends of the spring are welded with the left and right baffles respectively.
5. The dual check valve of claim 4, wherein: Mounting holes are arranged on the valve body and the damper for mounting the double one-way valve on a machine body, the damper is made of rubber, and the damper is divided into blocks around the axis to avoid the mounting hole position.
6. The dual check valve of claim 5, wherein: The damper is in the shape of a straw hat with a through hole in the middle, and the number of damper blocks is 2-4.