Hydraulic anti-overflow valve device

Abstract

The utility model discloses a hydraulic anti-overflow valve device, which comprises a shell, a sealing seat, a floater component, a steel ball and a valve seat, the shell is responsible for assembling and connecting a base body with the outside and among all parts, the sealing seat is assembled on the shell, the floater component is sealed with a floater after moving to a certain position, the floater component is a moving part, and the steel ball is arranged on the valve seat. The sealing structure is characterized in that the sealing seat is of a Y-shaped sealing structure, the floater and the sealing seat are matched and sealed in an inclined plane angle mode, the steel ball is a component which is responsible for pushing the floater assembly to move in the movement process, and the valve seat is in threaded connection with the shell and is provided with a steel ball movement guide angle. And the angle required by rolling of the steel ball is controlled. The device is small in design size, light in weight, few in parts, easy to machine, simple and reliable to assemble and better in sealing effect.

Description

Technical Field

[0001] This utility model patent belongs to the field of hydraulic technology, and specifically discloses a hydraulic anti-overflow valve device. Background Technology

[0002] This technology involves hydraulic, fuel, and water systems in flight and land equipment (primarily applied in fuel systems). Due to system requirements, it is typically open to release internal pressure. When the system performs special actions, it can be closed to prevent hydraulic fluid from overflowing, ensuring continued system operation and equipment safety. When the fluid level exceeds a certain threshold, the device can also be closed by the buoyancy of the system's hydraulic pressure.

[0003] To prevent overpressure in the system, which could lead to abnormal shutdown of the device, preventing it from performing necessary operations, or causing it to fail to return to its original position due to liquid adhesion, or resulting in a failure to close properly or an incomplete closure, this system is designed to ensure its reliability and improve its ability to withstand abnormal shutdowns caused by overpressure. Utility Model Content

[0004] The purpose of this invention is to improve the pressure-bearing capacity and solve the problems caused by system overpressure leading to the device's malfunction (abnormal sealing, i.e., the float and the sealing seat forming a seal – high air pressure and flow rate blow the float upwards, reducing the pressure-bearing capacity or causing it to lose its pressure-bearing function), and the inability of the float to return freely to its original position due to the adhesion of the liquid after a change in attitude, resulting in continued sealing with the sealing seat and loss of pressure-bearing capacity. It also ensures stability for other operating conditions and maintains the self-sealing capability relying on liquid buoyancy.

[0005] This utility model provides a hydraulic anti-overflow valve device, comprising a housing, a sealing seat, a float assembly, a steel ball, and a valve seat. The housing has a cylindrical hollow structure with a stepped structure, one end being the outlet and the other end being the connection end. A stepped surface is provided in the middle of the inner side of the housing. A guide shaft hole is provided in the housing near the outlet end. A sealing ring groove is provided along the axial direction of the housing towards the outlet end. The sealing seat is an annular structure integrally formed by a fixing part and an elastic part. The fixing part has a boss-shaped structure placed within the sealing ring groove. The float assembly includes… The system includes a float guide shaft and a float, the float having an umbrella-shaped structure. The float guide shaft is located at the top of the float and is slidably connected to the guide shaft hole. The elastic part and the mating surface above the float are inclined surfaces, which are arranged from the inner ring outwards and downwards, making the sealing seat a Y-shaped sealing structure. The housing has several inlets near the connecting end sidewall, and the float is placed below the inlets, which enhances the air pressure capacity and is almost unaffected by the inlet pressure. When the attitude changes and the float needs to seal with the sealing seat, the float is above the inlet, resulting in a better sealing effect. The inner side of the housing connecting end has an internal thread that mates with the external thread of the valve seat. The valve seat has a funnel-shaped guide groove, and the steel ball is placed in the guide groove to facilitate the rolling of the steel ball. The steel ball then pushes the float assembly to slide up and down. Different angles can be designed according to requirements. To ensure the stability of the original state and prevent the steel ball from rolling randomly, a through hole is designed at the bottom of the valve seat to facilitate the fixing of the steel ball and ensure that liquid can flow into the valve from this point and the inlet.

[0006] Furthermore, two symmetrical arc-shaped cavities are formed on both sides of the guide shaft hole inside the housing. The arc-shaped cavities are connected to the outlet, and the sum of their cross-sectional areas is less than the pipe diameter area.

[0007] Furthermore, the sealing seat is made of rubber, and the float assembly is made of metal in an umbrella shape, which combines sealing and resistance to pressure deformation as well as increasing the surface area. This makes it easier for the float to rise and form a seal with the sealing seat when the liquid level reaches a certain height, and it is also easier for the float to return to its original position, preventing adhesion.

[0008] Furthermore, the housing has a limiting angle surface that cooperates with the float between the sealing ring groove and the arc-shaped cavity to prevent excessive deformation of the sealing seat from affecting the seal.

[0009] The beneficial effects of this utility model are:

[0010] (1) The inlet is set on the circumferential surface of the shell and ensures that the device is above the float after assembly, which enhances the air pressure capacity and is almost unaffected by the inlet pressure. When the attitude change requires the float to seal with the sealing seat, the float is above the inlet, and the sealing effect is better.

[0011] (2) The float guide relies on the cooperation between the guide shaft hole of the housing and the guide shaft of the float to make the float move stably without wobbling and the sealing effect is more rational;

[0012] (3) Because the float is designed in the shape of an umbrella, the shell is designed with a limit fitting angle surface for the float to prevent the sealing seat from being deformed too much and affecting the seal. The shell outlet is designed with an arc cavity to maximize the ventilation area of ​​the sum of the cross-sections of the arc cavity. The device is designed to be small in size, light in weight, with few parts, easy to process, and simple and reliable to assemble.

[0013] (4) The float is made of metal umbrella shape, which has both sealing and pressure resistance and increased area, making it easier to float up and form a seal with the sealing seat when the liquid level reaches a certain height, and it is easier to return to its position to prevent sticking.

[0014] (5) The sealing seat is designed as a Y-shaped sealing structure and assembled in the annular sealing groove of the shell. It is matched and designed with a boss to fix the sealing seat to prevent accidental detachment. Its low Shore hardness and the matching of the float umbrella-shaped surface facilitate sealing and air removal to prevent vacuum adhesion and liquid adhesion.

[0015] (6) The valve seat is designed with a steel ball rolling guide angle slope. Different angles can be designed according to requirements. In order to ensure the stability of the original state and prevent the steel ball from rolling randomly, a through hole is designed at the bottom of the valve seat to facilitate the fixing of the steel ball and ensure that the liquid can flow into the valve from this point and the inlet. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0017] Figure 1 A schematic diagram of the hydraulic anti-overflow valve device provided by this utility model;

[0018] Figure 2 Top view of the hydraulic anti-overflow valve device provided by this utility model;

[0019] Figure 3 A schematic diagram illustrating the posture changes of the hydraulic anti-overflow valve device provided by this utility model;

[0020] Figure 4 A schematic diagram of the housing structure of the hydraulic anti-overflow valve device provided by this utility model;

[0021] Figure 5 for Figure 4 Enlarged view at point I;

[0022] In the attached diagram: 1-Housing, 11-Outlet end, 12-Connecting end, 13-Stepped surface, 14-Guide shaft hole, 15-Sealing ring groove, 16-Inlet, 17-Arc-shaped cavity, 18-Limiting angle surface

[0023] 2-Sealing seat, 21-Fixing part, 22-Elastic part

[0024] 3-Float assembly, 31-Guide shaft, 32-Float

[0025] 4-Steel ball

[0026] 5-Valve seat, 51-Guide groove, 52-Through hole Detailed Implementation

[0027] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary 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 to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0028] Please see Figure 1-5The figure shows a schematic diagram of the hydraulic anti-overflow valve device provided by this utility model, which consists of a housing 1, a sealing seat 2, a float assembly 3, a steel ball 4, and a valve seat 5. The housing 1 has a cylindrical cavity structure with a stepped structure, one end being the outlet end 11 and the other end being the connection end 12. A stepped surface 13 is provided in the middle of the inner side of the housing 1. A guide shaft hole 14 is provided in the housing 1 near the outlet end 11. A sealing ring groove 15 is provided in the stepped surface 13 along the axial direction of the housing 1 towards the outlet end 11. The sealing seat 2 is an annular structure integrally formed by a fixing part 21 and an elastic part 22. The fixing part 21 has a boss-shaped structure and is placed in the sealing ring groove 15. The float assembly 3 includes a float guide shaft 31 and a float 32. The float 32 has an umbrella-shaped structure. The float guide shaft 31 is placed at the top of the float 32. The float guide shaft 31 is slidably connected to the guide shaft hole 14. The mating surface between the elastic part 22 and the upper part of the float 32 is an inclined surface, which extends from the inner circle outward. The housing 1 is angled downwards, and several inlets 16 are provided on the side wall near the connecting end 12. The float 32 is placed below the inlets 16, which enhances the air pressure capacity and is almost unaffected by the inlet pressure. When the attitude changes and the float needs to seal with the sealing seat, the float is above the inlet, resulting in a better sealing effect. The inner side of the connecting end 12 of the housing 1 is provided with an internal thread that engages with the external thread of the valve seat 5. The valve seat 5 is provided with a funnel-shaped guide groove 51, and the steel ball 4 is placed in the guide groove 51. The center of the valve seat 5 is also provided with a through hole 52 that communicates with the guide groove 51. Different angles can be designed according to requirements. In order to ensure the stability of the original state and prevent the steel ball from rolling randomly, a through hole 52 is designed at the bottom of the valve seat to facilitate the fixing of the steel ball and ensure that liquid can flow into the valve from this point and the inlet. Two symmetrical arc-shaped cavities 17 are formed on both sides of the guide shaft hole 14 in the housing 1 and communicate with the outlet. The sum of the cross-sectional areas of the arc-shaped cavities 17 is less than the pipe diameter area. The sealing seat 2 is made of rubber, and the float assembly 3 is made of metal. It has sealing properties, resistance to pressure deformation, and increased area, making it easier for the float to rise and form a seal with the sealing seat when the liquid level reaches a certain height, and it is also easier to return to its original position to prevent adhesion. A limiting angle surface 18 that cooperates with the float 32 is provided between the sealing ring groove 15 and the arc cavity 17 to prevent the sealing seat 2 from being over-deformed and affecting the seal.

[0029] The housing 1 is responsible for the assembly and connection base with the outside and various components. The sealing seat 2 is assembled on the housing 1. When the float assembly 3 moves to a certain position, it seals with the float 32. The float assembly 3 is a moving part and is responsible for cooperating and sealing with the sealing seat 2. Its sealing structure is that the sealing seat adopts a Y-shaped sealing structure, and the cooperation and sealing between the float 3 and the sealing seat 2 is a bevel angle seal. The steel ball 4 is the part responsible for pushing the float assembly 3 to move during the movement. The valve seat 5 is threaded to the housing 1 and is designed with a steel ball 4 movement guide angle, which is responsible for the angle required when the steel ball needs to roll.

[0030] In the normal state (original position), inlet 16 is above float 32, responsible for introducing air pressure from the system into the valve and then discharging it through the outlet into the connecting pipe or externally. When the liquid level inside the system reaches a certain height, the buoyancy of the liquid causes the float assembly 3 to float and seal with the sealing seat 2.

[0031] like Figure 3 As shown, the valve changes its posture with the system, causing the steel ball 4 to roll in the guide groove 51 through the angle of the valve seat 5. This causes the float assembly 3 to shift and seal with the sealing seat 2, controlling the liquid within the system to remain inside. When the system returns to normal (e.g., Figure 1 The steel ball 4 and the float assembly 3 return to their original positions under their own weight, and the float assembly 3 separates from the sealing seat 2, so that the valve returns to the normal pressure relief state.

[0032] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, are all covered within the scope of the claims of this utility model.

Claims

1. A hydraulic anti-overflow valve device, characterized in that: The system comprises a housing (1), a sealing seat (2), a float assembly (3), a steel ball (4), and a valve seat (5). The housing (1) has a cylindrical cavity structure with a stepped structure, one end being the outlet end (11) and the other end being the connection end (12). A stepped surface (13) is provided in the middle of the inner side of the housing (1). A guide shaft hole (14) is provided in the housing (1) near the outlet end (11). A sealing ring groove (15) is provided on the stepped surface (13) along the axial direction of the housing (1) towards the outlet end (11). The sealing seat (2) is an annular structure integrally formed by a fixing part (21) and an elastic part (22). The fixing part (21) has a boss-shaped structure placed in the sealing ring groove (15). The float assembly (3) includes a float guide shaft (31) and a float (32). The float (32) has an umbrella-shaped structure. The float guide shaft (31) is placed at the top of the float (32). The float guide shaft (31) is slidably connected to the guide shaft hole (14). The elastic part (22) and the upper surface of the float (32) are inclined surfaces. The inclined surfaces are arranged obliquely downward from the inner circle outward. The housing (1) has several inlets (16) on the side wall near the connecting end (12). The float (32) is placed below the inlets (16). The inner side of the connecting end (12) of the housing (1) is provided with an internal thread that is threaded to the external thread of the valve seat (5). The valve seat (5) is provided with a funnel-shaped guide groove (51). The steel ball (4) is placed in the guide groove (51). The center of the valve seat (5) is also provided with a through hole (52) that communicates with the guide groove (51).

2. The hydraulic anti-overflow valve device according to claim 1, characterized in that: The guide shaft hole (14) inside the housing (1) forms two symmetrical arc-shaped cavities (17) on both sides, which are connected to the outlet. The sum of the cross-sectional areas of the arc-shaped cavities (17) is less than the pipe diameter area.

3. The hydraulic anti-overflow valve device according to claim 1, characterized in that: The sealing seat (2) is made of rubber.

4. The hydraulic anti-overflow valve device according to claim 1, characterized in that: The float assembly (3) is made of metal.

5. The hydraulic anti-overflow valve device according to claim 1, characterized in that: The housing (1) has a limiting angle surface (18) that cooperates with the float (32) between the sealing ring groove (15) and the arc-shaped cavity (17).

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