Two-way valve with filter

Abstract

The application discloses a bidirectional valve with a filtering device, which mainly comprises a screw plug, a filter screen assembly, a connecting pipe nozzle, a valve assembly and a valve seat, wherein the parts are all rotary bodies, the connecting pipe nozzle is provided with long threads, the screw plug is screwed to fix the filter screen assembly, the valve assembly can move along the valve seat to realize overpressure exhaust function, the connecting pipe nozzle outlet is designed with long threads for installation of the screw plug and the filter screen assembly, the valve assembly and the valve seat form a guide and can move flexibly, the valve assembly supports a cylindrical spring to provide pre-tightening force to guarantee overpressure exhaust function of the bidirectional valve, and the cylindrical spring is embedded in the valve assembly to guarantee vacuum exhaust function of the bidirectional valve, and the connecting pipe nozzle and the valve seat are connected with a fuel tank after being screwed by screws. The application is used for guaranteeing that the residual pressure of the fuel tank of an airplane is within a reasonable range in the whole flight profile, and has the advantages of compact structure, high integration, small volume and light weight.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vent valve, and particularly relates to a bidirectional valve with filtering device. BACKGROUND

[0002] In the prior art, a filter, a vacuum-proof valve and a safety valve are usually arranged in a fuel system to prevent excess substances and balance the pressure of a fuel tank, which causes the defects of a large number of product types and single function, and increases the weight and installation space of the system. SUMMARY

[0003] The present application aims to provide a bidirectional valve with high reliability, light weight, filtering function and automatic adjustment of the pressure of a fuel tank.

[0004] To achieve the object of the present application, the technical scheme adopted is as follows: a bidirectional valve with filtering device, which mainly comprises a screw plug, a filter screen assembly, a pipe connector, a valve assembly and a valve seat, wherein the components are all rotary bodies. The pipe connector is provided with long threads, and the screw plug is screwed to fix the filter screen assembly; the valve assembly can move along the valve seat to realize the overpressure exhaust function. The outer flange of one end of the valve seat and one end of the pipe connector is connected through a screw, the inner side of the valve seat and the pipe connector forms a cavity one, the other end of the valve seat is provided with an air inlet, the other end of the pipe connector 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 connector is in the form of a bent pipe, the inner side of the air outlet is provided with internal threads matched with the external threads of the screw plug, so that the screw plug is placed in the pipe connector, the screw plug is in the form of a ring-shaped column, the screw plug screws to fix the filter screen assembly in the pipe connector, the pipe connector is provided with a baffle near the valve seat, one end of the spring is sleeved outside the baffle, and the other end of the spring abuts against the top end of the valve assembly, the spring is provided with a gasket at the contact position of the spring and the pipe connector, and the valve assembly is an independent one-way valve placed in the cavity one and movable up and down.

[0005] Further, the valve assembly comprises a valve body, a valve plate, a cylindrical conical spring and a valve seat, the valve body is in the form of a hollow cylinder, the bottom of the valve body is provided with a flange, the outer side of the valve body is matched with the cavity one and slidable, the bottom of the valve body is provided with a through hole, and the inner side of the bottom of the valve body is provided with a ring groove, one end of the cylindrical conical spring is placed in the ring groove, and the other end of the cylindrical conical spring abuts against the bottom of the valve plate, the bottom of the valve plate is provided with a convex ring matched with the ring groove to guide the cylindrical conical 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 window 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 supplement function, the upper end of the valve seat is provided with an outer edge fixedly connected with the valve body through a bolt passing through a threaded hole, so that a cavity two is formed in the valve assembly, and the inner side wall of the valve body is uniformly provided with reinforcing ribs in the form of bosses.

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

[0007] Further, the filter screen assembly is welded by a filter screen and a base, and different precision metal mesh sizes can be selected according to working conditions.

[0008] Further, the filter screen installation groove is arranged in the adapter nozzle inner matching filter screen assembly, the filter screen assembly is fixed in the adapter nozzle by arranging a screw plug outside the filter screen assembly.

[0009] Further, the adapter nozzle inner side is provided with a step matched with the valve seat, and the valve seat is provided with a boss, the groove and the boss can form a hole shaft matching and ensure that the installation plane does not move.

[0010] Further, the valve seat flange upper and lower planes are provided with sealing ring grooves for installing sealing ring 4 and sealing ring 5.

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

[0012] When the adapter nozzle enters the gas, the gas enters the valve seat inner cavity, 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 gas is supplemented; when the system pressure returns to normal, the conical spring force overcomes the gas pressure, and the valve plate and the valve seat re-contact; the gas enters the valve seat and fills the inner cavity of the valve assembly, and drives the valve assembly, and then compresses the cylindrical spring, and the gas flows out from the adapter nozzle. When the fuel system pressure returns to normal, the cylindrical spring force overcomes the gas pressure, and the valve assembly returns to the original position.

[0013] The beneficial effects of the present application are:

[0014] The bidirectional valve with a filtering device integrates a safety valve, a vacuum prevention valve, a filter and the like to control the tank cleaning and pressure balance, ensures that the fuel tank pressure is within a reasonable range in the whole flight profile, and has the advantages of compact structure, high integration, small size and light weight. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings incorporated into the specification and forming a part thereof illustrate embodiments in accordance with the present application and, together with the description, serve to explain the principles of the application. It is to be expressly understood that the drawings are only for the purpose of illustration and are as such are not limiting of the application. In the drawings:

[0016] Figure 1 The structure schematic view of the bidirectional valve with a filtering device provided by the present application is shown in the drawings.

[0017] Figure 2 The valve assembly structure schematic diagram of the bidirectional valve provided by the application with filtering device

[0018] Figure 3 The A direction part structure schematic diagram of the bidirectional valve provided by the application with filtering device Figure 1

[0019] In the drawings:

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

[0021] 2-connection nozzle, 2.1-outlet, 2.2-shutter, 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 conical spring, 5.4-valve seat, 5.5-bolt, 5.6-sealing ring three, 5.7-sealing ring one, 5.8-sealing ring two, 5.9-cavity two, 5.1.1-stiffener, 5.1.2-ring groove one, 5.1.3-thread 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-cavity one, 9-sealing ring four, 10-sealing ring five, 11-gasket DETAILED DESCRIPTION

[0026] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art.

[0027] Referring to Figures 1-3 , the non-metal pipeline flexible joint structure schematic diagram provided by the application is shown, including valve seat 1, connection nozzle 2, screw plug 3, filter assembly 4, valve assembly 5, spring 6, wherein the outer flange of one end of valve seat 1 and one end of connection nozzle 2 is connected through screw 7 (such as Figure 3 ​), the valve seat 1 and the inner side of the adapter 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 adapter 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 adapter nozzle 2 has a bent pipe structure, the inner side of the air outlet 2.1 is provided with internal threads matched with the external threads of the plug 3, so that the plug 3 is placed in the adapter nozzle 2, the plug 3 has a ring-shaped cylindrical structure, the plug 3 is spin-welded to fix the filter screen assembly 4 in the adapter nozzle 2, the adapter nozzle 2 is provided with a baffle 2.2 near the valve seat 1, one end of the spring 6 is sleeved outside the baffle 2.2, and the other end abuts against the top end of the valve assembly 5, the spring 6 is provided with a gasket 11 at the contact position, and the valve assembly 5 is an independent one-way valve placed in the cavity 8 and can move up and down. The horizontal outlet of the adapter nozzle is beneficial to reduce the suction of excess substances in the air into the two-way valve.

[0028] The valve assembly 5 comprises a valve body 5.1, a valve plate 5.2, a cylindrical conical spring 5.3 and a valve seat 5.4, the valve body 5.1 has a hollow cylindrical shape, a flange is arranged at the bottom center, the outer side is matched with the cavity 8 and can slide, a through hole 5.1.4 is arranged at the bottom center, a ring groove 5.1.2 is arranged at the inner side of the bottom, one end of the cylindrical conical spring 5.3 is arranged in the ring groove 5.1.2, and the other end abuts against the bottom of the valve plate 5.2, the bottom of the valve plate 5.2 is provided with a convex ring 5.2.2 matched with the ring groove 5.1.2 to guide the cylindrical conical spring 5.3, the upper end of the valve plate 5.2 is sleeved in the valve seat 5.4, 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 supplement function, the upper end of the valve seat 5.4 is provided with an outer edge, the valve body 5.1 is fixedly connected through the bolt 5.5 passing through the threaded hole 5.1.3, so that the inside of the valve assembly forms a cavity 5.9, and the top end of the valve seat 5.4 is provided with a ring groove 5.4.1.

[0029] The inner side wall of the valve body 5.1 is uniformly provided with a reinforcing rib 5.1.1 in the form of a boss, which can be used as a limiting device for the valve plate 5.2. The valve seat 5.4 and the valve body 5.1 are provided with a sealing ring 5.7, the valve seat 5.4 and the valve plate 5.2 are provided with a sealing ring 5.8, and the outer side of the bottom end of the valve body 5.1 is provided with a sealing ring 5.6. The baffle 2.2 is provided with a plurality of grooves 2.2.1 along the axial direction, and the baffle 2.2 can be adaptively adjusted according to the inner diameter of the spring 6.

[0030] The adapter nozzle 2 is provided with a filter screen mounting groove matched with the filter screen assembly 4 for mounting the filter screen assembly 4, and the filter screen assembly 4 is fixed in the adapter nozzle 2 by the plug arranged outside.

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

[0032] The step 2.3 inside the connector nozzle 2 near the valve seat 1 end is matched with the boss 1.2 of the valve seat 1, the step 2.3 and the boss 1.2 can form a hole shaft cooperation and ensure that the installation plane does not move. At the same time, it can reduce the risk of cutting the sealing ring in the groove of the valve seat 1.

[0033] The sealing ring grooves are arranged on the upper and lower planes of the flange of the valve seat 1 for installing the sealing ring four 9 and the sealing ring five 10. When the connector nozzle 2 enters the gas, 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 gas is supplemented; when the system pressure returns to normal, the force of the conical spring 5.3 overcomes the gas pressure, the valve plate 5.2 recontacts with the valve seat 5.4; the gas fills the cavity two 5.9 of the valve assembly 5 after entering the valve seat 1, and pushes the valve assembly 5, and then compresses the cylindrical spring 5.3, and the gas flows out from the connector nozzle 2. When the fuel system pressure returns to normal, the force of the cylindrical spring overcomes the gas pressure, and the valve assembly 5 resets.

[0034] The above examples are only used to illustrate the technical solutions of the present application and not to limit, the modifications or equivalent replacements of the technical solutions of the present application made by those skilled in the art are included in the scope of the claims of the present application as long as they do not deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A bidirectional valve with a filter device, characterized in that: The assembly includes a valve seat (1), a connecting nozzle (2), a screw plug (3), a filter assembly (4), a valve assembly (5), and a spring (6). One end of the valve seat (1) and one end of the connecting nozzle (2) are connected by a screw (7). The valve seat (1) and the connecting nozzle (2) form a cavity (8) on their inner sides. The other end of the valve seat (1) has an air inlet (1.1), and the other end of the connecting nozzle (2) has an air outlet (2.1). The inlet area of ​​the air inlet (1.1) and the air outlet area are... (2.1) The outlet areas are equal. The connecting nozzle (2) has a bent tube structure. The inner side of the air outlet (2.1) is provided with an internal thread that matches the external thread of the screw plug (3), so that the screw plug (3) is placed inside the connecting nozzle (2). The screw plug (3) has an annular cylindrical structure. The screw plug (3) screws and fixes the filter screen assembly (4) inside the connecting nozzle (2). The connecting 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). The other end abuts against the top of the valve assembly (5). A washer (11) is provided at the contact point between the spring (6) and the connecting nozzle (2). The valve assembly (5) is an independent one-way valve placed in the cavity (8) and can move up and down. The valve assembly (5) includes a valve body (5.1), a valve plate (5.2), a cylindrical conical spring (5.3), and a valve seat (5.4). The valve body (5.1) is a hollow cylinder with a flange at the bottom facing the center. The outer side is slidable in conjunction with the cavity (8). The center of the part has a through hole (5.1.4), and the inner flange of the bottom has an annular groove (5.1.2). One end of the cylindrical conical 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). The bottom of the valve plate (5.2) has a protruding ring (5.2.2) that cooperates with the annular groove (5.1.2) to guide the cylindrical conical spring (5.3). The upper end of the valve plate (5.2) is fitted into the valve seat (5.4). The side wall of the valve plate (5.2) has an exhaust port window (5.4). 5.2.1), the sum of the cross-sectional areas of the exhaust port 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 achieve the low-pressure gas replenishment function. The upper end of the valve seat (5.4) is provided with an outer edge that is fixedly connected to the valve body (5.1) by bolts (5.5) passing through the threaded hole (5.1.3), so that the valve assembly forms a cavity two (5.9). The top of the valve seat (5.4) is provided with an annular groove two (5.4.1). The inner sidewall of the valve body (5.1) is uniformly provided with convex reinforcing ribs (5.2.1). 5.1.1); The valve seat (5.4) and valve body (5.1) are provided with a sealing ring one (5.7), the valve seat (5.4) and valve plate (5.2) are provided with a sealing ring two (5.8), and the valve body (5.1) is provided with a sealing ring three (5.6) on the outer side of the bottom end; The baffle (2.2) is provided with several grooves (2.2.1) along the axial direction, and the baffle (2.2) can be adjusted according to the inner diameter of the spring (6); The nozzle (2) is provided with a filter screen assembly (4) in cooperation with it. The filter screen mounting groove will be used to install the filter screen assembly (4). The filter screen assembly (4) is fixed inside the connector (2) by a screw plug. The filter screen assembly (4) is welded from the filter screen and the base. The metal mesh size of different precision can be selected according to the working conditions. The inner side of the connector (2) near the valve seat (1) is provided with a step (2.3) that cooperates with the boss (1.2) provided on the valve seat (1). The step (2.3) and the boss (1.2) can form a hole-shaft fit and ensure that the mounting plane does not move.

2. The bidirectional valve with a filter device according to claim 1, characterized in that: The valve seat (1) flange has sealing ring grooves on both the upper and lower planes for installing sealing ring four (9) and sealing ring five (10).

3. The bidirectional 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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