Bidirectional valve with filtering device

Abstract

The invention discloses a two-way valve with a filter device, which mainly comprises a plug screw, a filter screen assembly, a filler neck, a valve assembly and a valve seat, the parts are all revolved bodies, the filler neck is provided with a long thread, and the plug screw fixes the filter screen assembly in a spinning manner; the valve assembly can act along the valve seat to achieve the overpressure exhaust function. A long thread is designed at an outlet of the filler neck for mounting the plug screw and the filter screen assembly; the valve assembly and the valve seat form guiding and can move flexibly. The valve assembly supports a cylindrical spring to provide pre-tightening force to guarantee the overpressure exhaust function of the two-way valve, and meanwhile the embedded cylindrical conical spring guarantees the vacuum exhaust prevention function of the two-way valve. The filler neck and the valve seat are connected with the fuel tank after being tightened by screws; the device is used for ensuring that the excess pressure of the fuel tank of the aircraft is within a reasonable range in the whole flight profile, and the device is compact in structure, high in integration level, small in size and light in weight.

Description

Technical Field

[0001] The invention belongs to the technical field of ventilation valves, and in particular relates to a two-way valve with a filtering device. Background Art

[0002] In the prior art, the fuel system is usually provided with a filter, an anti-vacuum valve and a safety valve to prevent excess matter and balance the fuel tank pressure. This measure results in the defects of a wide variety of products and a single function, and increases the weight and installation space of the system. Summary of the invention

[0003] The object of the present invention is to provide a two-way valve which has high reliability, light weight, filtering function and can automatically adjust the oil tank pressure.

[0004] In order to achieve the purpose of the present invention, the technical solution adopted is: a two-way valve with a filtering device, the main components of which are a screw plug, a filter assembly, a nozzle, a valve assembly and a valve seat, and the parts are all rotating bodies. The nozzle is provided with a long thread, and the screw plug is spun to fix the filter assembly; the valve assembly can move along the valve seat to realize the overpressure exhaust function. One end of the valve seat and the outer flange of one end of the pipe nozzle are connected by screws, and the valve seat and the inner side of the pipe nozzle form a cavity. The other end of the valve seat is provided with an air inlet, and the other end of the pipe nozzle is provided with an air outlet. The inlet area of ​​the air inlet is equal to the outlet area of ​​the air outlet. The pipe nozzle is a curved tube structure, and the inner side of the air outlet is provided with an internal thread that cooperates with the external thread of the screw plug, so that the screw plug is placed in the pipe nozzle. The screw plug is an annular cylindrical structure, and the screw plug spins and fixes the filter assembly in the pipe nozzle. A baffle is provided in the pipe nozzle near the valve seat, one end of the spring is sleeved on the outside of the baffle, and the other end is against the top of the valve assembly. A gasket is provided at the contact between the spring and the pipe nozzle, and the valve assembly is an independent one-way valve placed in cavity one and can move up and down.

[0005] Furthermore, the valve assembly includes a valve body, a valve plate, a cylindrical cone spring and a valve seat. The valve body is hollow cylindrical and has a flange at the bottom toward the center. The outer side cooperates with the cavity 1 to slide. A through hole is provided at the center of the bottom. The inner flange of the bottom is provided with an annular groove. One end of the cylindrical cone spring is placed in the annular groove, and the other end is against the bottom of the valve plate. The bottom of the valve plate is provided with a convex ring that cooperates with the annular groove to guide the cylindrical cone spring. The upper end of the valve plate is sleeved in the valve seat. The side wall of the valve plate is provided with an exhaust hole window. The sum of the cross-sectional areas of the exhaust hole windows is equal to the cross-sectional area of ​​the through hole. When the valve plate moves along the valve seat, the cavity gas can flow smoothly to realize the low-pressure air replenishment function. The upper end of the valve seat is provided with an outer edge and fixedly connected with the valve body through a bolt passing through a threaded hole, so that the cavity 2 is formed inside the valve assembly. The inner side wall of the valve body is evenly provided with boss-shaped reinforcing ribs.

[0006] Furthermore, a sealing ring 1 is provided between the valve seat and the valve body, a sealing ring 2 is provided between the valve seat and the valve plate, and a sealing ring 3 is provided on the outer side of the bottom end of the valve body.

[0007] Furthermore, the filter assembly is formed by welding the filter and the base, and metal mesh sizes with different precisions can be selected according to working conditions.

[0008] Furthermore, a filter installation groove is provided in the mouthpiece to cooperate with the filter assembly for installing the filter assembly, and a screw plug is provided outside the filter assembly to fix it in the mouthpiece.

[0009] Furthermore, a step is provided on the inner side of the nozzle near the valve seat end to cooperate with a boss provided on the valve seat, and the groove and the boss can form a hole-axis fit and ensure that the installation plane does not move.

[0010] Furthermore, the upper and lower planes of the valve seat flange are both provided with sealing ring grooves for installing sealing ring four and sealing ring five.

[0011] Furthermore, the screw plug is made of non-metallic material.

[0012] When the gas enters the nozzle, the gas enters the inner cavity of the valve seat, the gas presses the valve plate, the conical spring is compressed, the gas flows out from the valve seat, and the system is pressurized and replenished; when the system pressure returns to normal, the conical spring force overcomes the gas pressure, and the valve plate and the valve seat are re-contacted; after the gas enters from the valve seat, it fills the inner cavity of the valve assembly and pushes the valve assembly, thereby compressing the cylindrical spring, and the gas flows out from the nozzle. When the fuel system pressure returns to normal, the cylindrical spring force overcomes the gas pressure, and the valve assembly returns to its position.

[0013] Beneficial effects of the present invention:

[0014] The two-way valve with a filter device of the present invention integrates a safety valve, an anti-vacuum valve, a filter and other products to control the cleaning and pressure balance of the fuel tank, ensuring that the residual pressure of the aircraft fuel tank is within a reasonable range throughout the flight profile. The product has a compact structure, high integration, small size and light weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings herein are incorporated into and constitute a part of the specification, showing embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0016] Figure 1 A schematic diagram of the structure of a two-way valve with a filtering device provided by the present invention;

[0017] Figure 2 Schematic diagram of the valve assembly structure of the two-way valve with a filtering device provided by the present invention

[0018] Figure 3 for Figure 1 Schematic diagram of the structure of the A direction part

[0019] In the attached figure:

[0020] 1-valve seat, 1.1-air inlet, 1.2-boss

[0021] 2- Nozzle, 2.1- Air outlet, 2.2- Baffle, 2.3- Step, 2.2.1- Groove

[0022] 3-Screw plug

[0023] 4-Filter assembly

[0024] 5-valve assembly, 5.1-valve body, 5.2-valve plate, 5.3-cylindrical cone spring, 5.4-valve seat, 5.5-bolt, 5.6-seal ring three, 5.7-seal ring one, 5.8-seal ring two, 5.9-cavity two, 5.1.1-reinforcement rib, 5.1.2-ring groove one, 5.1.3-threaded hole, 5.1.4-through hole, 5.2.1-exhaust hole window, 5.2.2-convex ring, 5.4.1-ring groove two

[0025] 6-spring, 7-screw, 8-chamber one, 9-sealing ring four, 10-sealing ring five, 11-washer. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present invention will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0027] See also Figure 1-3 , the figure shows a schematic diagram of the structure of the non-metallic pipeline flexible joint provided by the present invention, including a valve seat 1, a nozzle 2, a screw plug 3, a filter assembly 4, a valve assembly 5, and a spring 6, wherein the outer flange of one end of the valve seat 1 and the nozzle 2 are connected by a screw 7 (such as Figure 3), the valve seat 1 and the inner side of the take-over nozzle 2 form a cavity 8, the other end of the valve seat 1 is provided with an air inlet 1.1, and the other end of the take-over nozzle 2 is provided with an air outlet 2.1. The inlet area of ​​the air inlet 1.1 is equal to the outlet area of ​​the air outlet 2.1. The take-over nozzle 2 is a curved tube structure, and the inner side of the air outlet 2.1 is provided with an internal thread that cooperates with the external thread of the screw plug 3, so that the screw plug 3 is placed in the take-over nozzle 2. The screw plug 3 is an annular cylindrical structure, and the screw plug 3 spins and fixes the filter assembly 4 in the take-over nozzle 2. The take-over nozzle 2 is provided with a baffle 2.2 near the valve seat 1, one end of the spring 6 is sleeved on the outside of the baffle 2.2, and the other end is against the top of the valve assembly 5. The contact between the spring 6 and the take-over nozzle 2 is provided with a gasket 11. The valve assembly 5 is an independent one-way valve placed in the cavity 8 and can move up and down. The horizontal orientation of the take-over nozzle outlet is conducive to reducing the excess in the air from being sucked into the two-way valve.

[0028] The valve assembly 5 includes a valve body 5.1, a valve plate 5.2, a cylindrical cone spring 5.3 and a valve seat 5.4. The valve body 5.1 is in the shape of a hollow cylinder, and a flange is provided at the bottom toward the center. The outer side cooperates with the cavity 8 to slide. A through hole 5.1.4 is provided at the center of the bottom, and an annular groove 5.1.2 is provided at the inner flange of the bottom. One end of the cylindrical cone spring 5.3 is in the annular groove 5.1.2, and the other end is against the bottom of the valve plate 5.2. A convex ring 5.2.2 is provided at the bottom of the valve plate 5.2 to cooperate with the annular groove 5.1.2 to guide the cylindrical cone spring 5.3. The valve plate 5 .2 The upper end is sleeved in the valve seat 5.4, and the side wall of the valve plate 5.2 is provided with an exhaust hole window 5.2.1. The sum of the cross-sectional areas of the exhaust hole window 5.2.1 is equal to the cross-sectional area of ​​the through hole 5.1.4. When the valve plate 5.2 moves along the valve seat 5.4, the cavity gas can flow smoothly to realize the low-pressure air replenishment function. The upper end of the valve seat 5.4 is provided with an outer edge and is fixedly connected with the valve body 5.1 through the threaded hole 5.1.3 by a bolt 5.5, so that a cavity 5.9 is formed inside the valve assembly. The top of the valve seat 5.4 is provided with a ring groove 5.4.1

[0029] The inner wall of the valve body 5.1 is evenly provided with convex-shaped reinforcing ribs 5.1.1, which can be used as a limit device for the valve plate 5.2. A sealing ring 1 5.7 is provided between the valve seat 5.4 and the valve body 5.1, a sealing ring 2 5.8 is provided between the valve seat 5.4 and the valve plate 5.2, and a sealing ring 3 5.6 is provided on the outer side of the bottom end of the valve body 5.1. The baffle plate 2.2 is provided with a plurality of grooves 2.2.1 along the axial direction, and the baffle plate 2.2 can be adaptively adjusted according to the inner diameter of the spring 6.

[0030] A filter installation groove is provided in the filler nozzle 2 to cooperate with the filter assembly 4 for installing the filter assembly 4 , and a screw plug is provided outside the filter assembly 4 to fix it in the filler nozzle 2 .

[0031] The filter assembly 4 is welded by a filter and a base, and metal mesh sizes with different precisions can be selected according to working conditions.

[0032] A step 2.3 is provided on the inner side of the nozzle 2 near the end of the valve seat 1 to cooperate with the boss 1.2 provided on the valve seat 1. The step 2.3 and the boss 1.2 can form a hole-axis fit and ensure that the installation plane does not move. At the same time, the risk of the groove sealing ring on the valve seat 1 being cut is reduced.

[0033] The upper and lower planes of the valve seat 1 flange are provided with sealing ring grooves for installing sealing ring 4 9 and sealing ring 5 10. When the gas enters the nozzle 2, the gas enters the inner cavity of the valve seat 1, the gas presses the valve plate 5.2, the conical spring 5.3 is compressed, the gas flows out from the valve seat 1, and the system is pressurized and replenished; when the system pressure returns to normal, the conical spring 5.3 overcomes the gas pressure, and the valve plate 5.2 contacts the valve seat 5.4 again; after the gas enters from the valve seat 1, it fills the cavity 2 5.9 of the valve assembly 5, and pushes the valve assembly 5, thereby compressing the cylindrical spring 5.3, and the gas flows out from the nozzle 2. When the fuel system pressure returns to normal, the cylindrical spring force overcomes the gas pressure, and the valve assembly 5 returns to its original position.

[0034] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Any modification or equivalent substitution made to the technical solution of the present invention by ordinary technicians in this field shall be included in the scope of the claims of the present invention as long as it does not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A two-way valve with a filtering device, characterized in that: The invention comprises a valve seat (1), a take-over nozzle (2), a screw plug (3), a filter assembly (4), a valve assembly (5), and a spring (6), wherein the outer flanges of one end of the valve seat (1) and one end of the take-over nozzle (2) are connected by screws (7), the inner sides of the valve seat (1) and the take-over nozzle (2) form a cavity (8), the other end of the valve seat (1) is provided with an air inlet (1.1), the other end of the take-over nozzle (2) is provided with an air outlet (2.1), the inlet area of ​​the air inlet (1.1) is equal to the outlet area of ​​the air outlet (2.1), the take-over nozzle (2) is in the shape of a curved tube, and the air outlet (2.1) is provided with a plurality of air inlets (1.1) and a plurality of air outlets (2.1). ) is provided with an internal thread on the inner side thereof and cooperates with the external thread of the screw plug (3), so that the screw plug (3) is placed in the take-over nozzle (2); the screw plug (3) is an annular cylindrical structure; the screw plug (3) spins and fixes the filter assembly (4) in the take-over nozzle (2); a baffle (2.2) is provided in the take-over nozzle (2) near the valve seat (1); one end of the spring (6) is sleeved on the outside of the baffle (2.2) and the other end is against the top of the valve assembly (5); a gasket (11) is provided at the contact point between the spring (6) and the take-over nozzle (2); the valve assembly (5) is an independent one-way valve placed in the cavity (8) and can move up and down.

2. The two-way valve with a filter device according to claim 1, characterized in that: The valve assembly (5) comprises a valve body (5.1), a valve plate (5.2), a cylindrical cone spring (5.3) and a valve seat (5.4). The valve body (5.1) is in the shape of a hollow cylinder, and a flange is provided at the bottom toward the center. The outer side cooperates with the cavity (8) to slide. A through hole (5.1.4) is provided at the center of the bottom, and an annular groove (5.1.2) is provided at the inner flange of the bottom. One end of the cylindrical cone spring (5.3) is placed in the annular groove (5.1.2), and the other end abuts against the bottom of the valve plate (5.2). A convex ring (5.2.2) is provided at the bottom of the valve plate (5.2) to cooperate with the annular groove (5.1.2) to guide the cylindrical cone spring (5.3). The upper end of the valve plate (5.2) is sleeved in the valve seat (5.4), and the side wall of the valve plate (5.2) is provided with an exhaust hole window (5.1.2). 5.2.1), the sum of the cross-sectional areas of the exhaust hole windows (5.2.1) is equal to the cross-sectional area of ​​the through hole (5.1.4), when the valve plate (5.2) moves along the valve seat (5.4), the cavity gas can flow smoothly to achieve the low-pressure air replenishment function, the upper end of the valve seat (5.4) is provided with an outer edge and is fixedly connected to the valve body (5.1) by bolts (5.5) passing through the threaded hole (5.1.3), so that a second cavity (5.9) is formed inside the valve assembly, and the top of the valve seat (5.4) is provided with a second annular groove (5.4.1).

3. The two-way valve with a filter device according to claim 2, characterized in that: The inner side wall of the valve body (5.1) is evenly provided with boss-shaped reinforcing ribs ( 5.1.1)。 4. The two-way valve with a filter device according to claim 2, characterized in that: The valve seat (5.4) and the valve body (5.1) are provided with a sealing ring 1 (5.7), a sealing ring 2 (5.8) is provided between the valve seat (5.4) and the valve plate (5.2), and a sealing ring 3 (5.6) is provided on the outer side of the bottom end of the valve body (5.1).

5. The two-way valve with a filter device according to claim 1, characterized in that: The baffle plate (2.2) is provided with a plurality of grooves (2.2.1) along the axial direction, and the baffle plate (2.2) can be adaptively adjusted according to the inner diameter of the spring (6).

6. The two-way valve with a filter device according to claim 1, characterized in that: The filler nozzle (2) is provided with a filter installation groove in cooperation with the filter assembly (4) for installing the filter assembly (4), and a screw plug is provided outside the filter assembly (4) to fix it in the filler nozzle (2).

7. The two-way valve with a filter device according to claim 1, characterized in that: The filter assembly (4) is formed by welding a filter and a base, and metal mesh sizes with different precisions can be selected according to working conditions.

8. The two-way valve with a filter device according to claim 1, characterized in that: A step (2.3) is arranged on the inner side of the nozzle (2) near the end of the valve seat (1) to cooperate with a boss (1.2) arranged on the valve seat (1); the step (2.3) and the boss (1.2) can form a hole-axis fit and ensure that the installation plane does not move.

9. The two-way valve with a filter device according to claim 1, characterized in that: The upper and lower planes of the valve seat (1) flange are both provided with sealing ring grooves for installing sealing ring four (9) and sealing ring five (10).

10. The two-way valve with a filter device according to claim 1, characterized in that: The screw plug (3) is made of non-metallic material.

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