Magnetic levitation check valve

Abstract

The utility model provides a kind of magnetic suspension check valve, belong to valve field.It solves the problem that existing check valve is prone to sealing failure due to spring fatigue, corrosion.The present magnetic suspension check valve, including valve body, bonnet and valve core, valve body and bonnet are connected by internal and external thread cooperation, magnetic suspension check valve further include magnetic force device and sealing assembly, magnetic force device includes magnetic ring and magnetic force column, magnetic suspension check valve further include water pressure plate, its upper end surface is equipped with flow guide protrusion, water pressure plate lower end center portion is equipped with guide column and extends axially downward, the guide hole is opened in valve core, sealing assembly includes valve core cover, O ring and sealing gasket, multiple connecting parts are equipped with axially in valve core outer portion, wherein, limit step is equipped in valve body interior, multiple connecting parts and can abut and install on limit step, and sealing connection is realized by valve core cover, sealing gasket and bonnet cooperation.The utility model has the advantages of long service life.

Description

Technical Field

[0001] This utility model belongs to the field of valves, and relates to a check valve, and more particularly to a magnetic levitation check valve. Background Technology

[0002] A check valve is a type of valve whose opening and closing element is a circular valve disc that relies on its own weight and the pressure of the medium to prevent backflow. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, reflux valve, or isolation valve.

[0003] Traditional check valves mostly rely on springs to reset the valve core. With long-term use, the valve core is prone to failure due to spring fatigue and corrosion, or delayed response. Although existing magnetic check valves avoid the defects of springs, the magnetic drive and sealing structure are not well coordinated. They are prone to water hammer effect or uneven seal wear caused by fluid eddies, and the maintenance cost is high. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a magnetic levitation check valve to solve these problems.

[0005] The purpose of this utility model can be achieved through the following technical solution: a magnetic levitation check valve, comprising a valve body, a valve cap and a valve core, wherein the valve body and the valve cap are connected by internal and external threads, characterized in that the magnetic levitation check valve further comprises a magnetic device and a sealing assembly;

[0006] The magnetic device includes a magnetic ring fixed inside the valve core and a magnetic column that engages with the magnetic ring axially.

[0007] The magnetic levitation check valve also includes a pressure plate for preventing backflow, and its upper surface is provided with a flow guide protrusion to suppress eddies.

[0008] A guide post is provided at the center of the lower end of the pressure plate, extending axially downwards, for mounting a magnetic column. The valve core is provided with a guide hole that movably cooperates with the guide post.

[0009] The sealing assembly is located at the connection between the valve cap and the valve body. The sealing assembly includes a valve core cover, an O-ring for sealing, and a sealing gasket for dynamic check seal with the upper end of the pressure plate.

[0010] The valve core is provided with multiple connecting parts on its outer axial direction. The valve core is connected to and fixed inside the valve body through multiple connecting parts. The valve body is provided with a limiting step for limiting the installation of multiple connecting parts and sealing components. Multiple connecting parts can be installed against the limiting step and achieve a sealed connection through the cooperation of valve core cover, sealing gasket and valve cap.

[0011] When the fluid flows in the forward direction, the fluid pressure pushes the pressure plate to open the channel between the valve core and the inner wall of the valve body. When the fluid pressure disappears, the magnetic force of the magnetic column and the magnetic ring works together to drive the pressure plate to move axially, so that the upper end of the pressure plate forms a dynamic seal with the sealing gasket.

[0012] In the aforementioned magnetic levitation check valve, the guide protrusions at the upper end of the pressure plate are distributed in a spiral pattern at intervals, which can be used to suppress fluid eddies.

[0013] In the aforementioned magnetic levitation check valve, the clearance between the guide post and the guide hole is 0.1–0.5 mm to ensure the stability of the axial movement of the pressure plate.

[0014] In the aforementioned magnetic levitation check valve, the O-ring is located between the valve core cover and the valve body to achieve a static seal, and the sealing gasket is fixed between the valve core cover and the valve core connection, and forms a dynamic check seal with the upper end of the pressure plate.

[0015] In the aforementioned magnetic levitation check valve, the guide column has a mounting hole at its center, the magnetic column is embedded inside the mounting hole, and a sealing plug is provided at the end of the mounting hole for axial limiting of the magnetic column.

[0016] In the aforementioned magnetic levitation check valve, the valve core cover, sealing gasket, and valve cap are sequentially pressed onto the limiting step inside the valve body and locked by threads to form a three-stage sealing structure.

[0017] In the aforementioned magnetic levitation check valve, the magnetic ring and the magnetic column are arranged with their poles opposite each other. When the fluid pressure disappears, the magnetic repulsion drives the ring to move axially upward and form a seal with the sealing gasket.

[0018] In the aforementioned magnetic levitation check valve, a plug for limiting and fixing the magnetic ring is provided above the valve core, and the plug is connected to the valve core through internal and external thread engagement.

[0019] Compared with existing technologies, this magnetic levitation check valve uses magnetic repulsion to replace traditional springs, avoiding metal fatigue and corrosion problems, significantly extending the valve's service life, and is especially suitable for corrosive environments such as chemical plants and seawater. Attached Figure Description

[0020] Figure 1 This is a half-section three-dimensional structural diagram of the magnetic levitation check valve.

[0021] Figure 2 This is a schematic diagram of the half-section structure of this magnetic levitation check valve from another direction.

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the valve core of this magnetic levitation check valve.

[0023] In the diagram, 1. Valve body; 2. Valve core; 3. Valve cap; 4. Magnetic ring; 5. Magnetic column; 6. Pressure plate; 7. Guide protrusion; 8. Guide column; 9. Guide hole; 10. Valve core cover; 11. O-ring; 12. Sealing gasket; 13. Connecting part; 14. Limiting step; 15. Plug. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] like Figure 1 , Figure 2 , Figure 3 As shown, this magnetic levitation check valve includes a valve body 1, a valve cap 3, and a valve core 2. The valve body 1 and the valve cap 3 are connected by internal and external threads. The magnetic levitation check valve also includes a magnetic device and a sealing assembly. The magnetic device includes a magnetic ring 4 fixed inside the valve core 2 and a magnetic column 5 that axially magnetically engages with the magnetic ring 4. The magnetic levitation check valve also includes a pressure plate 6 for preventing backflow. Its upper surface has a guide protrusion 7 to suppress eddy currents. A guide column 8 extends axially downward from the lower center of the pressure plate 6 for mounting the magnetic column 5. The valve core 2 has a guide hole 9 that movably engages with the guide column 8. The sealing assembly is located at the connection between the valve cap 3 and the valve body 1. The sealing assembly includes a valve core cover 10 and an O-ring 11 for sealing. The valve core 2 is provided with a sealing gasket 12 for dynamic check seal with the upper end of the pressure plate 6. The valve core 2 is provided with multiple connecting parts 13 on the outer axis. The valve core 2 is connected to the inside of the valve body 1 through the multiple connecting parts 13. The valve body 1 is provided with a limiting step 14 for limiting the installation of the multiple connecting parts 13 and the sealing components. The multiple connecting parts 13 can be installed on the limiting step 14 and are sealed by the cooperation of the valve core cover 10, the sealing gasket 12 and the valve cap 3. When the fluid flows in the forward direction, the fluid pressure pushes the pressure plate 6 to open the channel between the valve core 2 and the inner wall of the valve body 1. When the fluid pressure disappears, the magnetic force of the magnetic column 5 and the magnetic ring 4 drives the pressure plate 6 to move axially, so that the upper end of the pressure plate 6 forms a dynamic seal with the sealing gasket 12.

[0026] The guide protrusions 7 at the upper end of the pressure plate 6 are spirally spaced, which can be used to suppress fluid eddies. The spiral guide protrusions 7 at the upper end of the pressure plate 6 suppress eddies, reduce water hammer effect, and reduce pipeline vibration and noise.

[0027] The clearance between the guide post 8 and the guide hole 9 is 0.1–0.5 mm to ensure the stability of the axial movement of the pressure plate 6. An O-ring 11 is located between the valve core cover 10 and the valve body 1 to achieve a static seal. The sealing gasket 12 is fixed between the valve core cover 10 and the connection part 13 of the valve core 2, and forms a dynamic check seal with the upper end of the pressure plate 6. The guide post 8 has a mounting hole at its center, and the magnetic post 5 is embedded inside the mounting hole. A sealing plug is provided at the end of the mounting hole for axial positioning of the magnetic post 5. The valve core cover 10, sealing gasket 12, and valve cap 3 are sequentially pressed onto the limiting step 14 inside the valve body 1 and locked by threads to form a three-stage sealing structure. The magnetic ring 4 and the magnetic post 5 are arranged with opposite poles. When the fluid pressure disappears, they are driven axially upward by magnetic repulsion and form a seal with the sealing gasket 12. A plug 15 is also provided above the valve core 2 for limiting and fixing the magnetic ring 4. The plug 15 is connected to the valve core 2 by internal and external threads.

[0028] Working principle

[0029] Fluid pressure pushes the pressure plate 6 to move axially downwards. The pressure plate 6 drives the guide post 8 and the built-in magnetic post 5 to slide downwards along the guide hole 9 of the valve core 2, opening the flow channel between the valve core 2 and the inner wall of the valve body 1. At this time, the magnetic repulsion between the magnetic ring 4 and the magnetic post 5 is overcome by the fluid pressure, and the channel remains open.

[0030] After the fluid pressure disappears, the magnetic repulsion between the magnetic ring 4 and the magnetic column 5 drives the pressure plate 6 to move axially upward. The sealing surface at the upper end of the pressure plate 6 is tightly fitted with the sealing gasket 12, forming a dynamic check seal to prevent backflow of fluid. The precise gap of 0.1–0.5 mm between the guide column 8 and the guide hole 9 ensures stable movement of the pressure plate 6 without skewing or jamming.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0032] Although this document uses a considerable amount of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A magnetically levitated check valve, comprising a valve body (1), a valve cap (3), and a valve core (2), wherein the valve body (1) and the valve cap (3) are connected by internal and external threads, characterized in that, The magnetic levitation check valve also includes a magnetic device and a sealing assembly; The magnetic device includes a magnetic ring (4) fixed inside the valve core (2) and a magnetic column (5) that engages with the magnetic ring (4) axially. The magnetic levitation check valve also includes a pressure plate (6) for preventing backflow, and its upper surface is provided with a flow guide protrusion (7) for suppressing eddies. A guide post (8) is provided at the lower center of the pressure plate (6) and extends axially downward for the installation of the magnetic column (5). A guide hole (9) is provided on the valve core (2) to cooperate with the guide post (8). The sealing assembly is located at the connection between the valve cap (3) and the valve body (1). The sealing assembly includes a valve core cover (10), an O-ring (11) for sealing, and a sealing gasket (12) for dynamic check seal with the upper end of the pressure plate (6). The valve core (2) is provided with multiple connecting parts (13) on its outer axial direction. The valve core (2) is connected to the inside of the valve body (1) through the multiple connecting parts (13). The valve body (1) is provided with a limiting step (14) for limiting the installation of the multiple connecting parts (13) and the sealing assembly. The multiple connecting parts (13) can be installed against the limiting step (14) and achieve a sealed connection through the cooperation of the valve core cover (10), the sealing gasket (12) and the valve cap (3). When the fluid flows in the forward direction, the fluid pressure pushes the pressure plate (6) to open the channel between the valve core (2) and the inner wall of the valve body (1). When the fluid pressure disappears, the magnetic force of the magnetic column (5) and the magnetic ring (4) drives the pressure plate (6) to move axially, so that the upper end of the pressure plate (6) and the sealing gasket (12) form a dynamic seal.

2. The magnetic levitation check valve according to claim 1, characterized in that, The guide protrusions (7) at the upper end of the pressure plate (6) are spirally spaced and can be used to suppress fluid eddies.

3. A magnetically levitated check valve according to claim 1, characterized in that, The clearance between the guide post (8) and the guide hole (9) is 0.1–0.5 mm to ensure the stability of the axial movement of the pressure plate (6).

4. A magnetically levitated check valve according to claim 1, characterized in that, The O-ring (11) is located between the valve core cover (10) and the valve body (1) to achieve static sealing. The sealing gasket (12) is fixed between the valve core cover (10) and the valve core (2) connection part (13) and forms a dynamic check seal with the upper end of the pressure plate (6).

5. A magnetically levitated check valve according to claim 1, characterized in that, The guide post (8) has a mounting hole in the center, and the magnetic post (5) is embedded in the mounting hole. A sealing plug is provided at the end of the mounting hole for axial positioning of the magnetic post (5).

6. A magnetically levitated check valve according to claim 1, characterized in that, The valve core cover (10), sealing gasket (12) and valve cap (3) are pressed onto the limiting step (14) inside the valve body (1) in sequence, and are locked by threads to form a three-level sealing structure.

7. A magnetically levitated check valve according to claim 1, characterized in that, The magnetic ring (4) and the magnetic column (5) are arranged opposite each other with the same pole. When the fluid pressure disappears, they are driven to move axially upward by magnetic repulsion and form a seal with the sealing gasket (12).

8. A magnetically levitated check valve according to claim 1, characterized in that, The valve core (2) is also provided with a plug (15) for limiting and fixing the magnetic ring (4), and the plug (15) is connected to the valve core (2) by internal and external thread.

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