A one-way valve

Abstract

This utility model relates to a one-way valve, including a valve body, a valve seat, and a valve core. The valve seat is installed in the valve body and forms a flow path. The valve core is disposed on one side of the valve seat and controls the opening and closing of the flow path. A sealing gasket is disposed on the end face of the valve seat facing the valve core, surrounding the outlet. In the installed state, the sealing gasket is compressed and deformed, filling and sealing the sealing surfaces of the valve seat and the valve core. This utility model provides spaced protective components on both the inner and outer sides of the sealing gasket. Each component consists of a sliding cavity, a pre-compression spring, and an inclined protective member. Under normal conditions, the protective members fit together to form a closed protective space. When the flow path is open, the protective member, driven by the spring, continuously blocks the direct contact between the medium and the sealing gasket, preventing high-pressure fluid from eroding and causing wear on the sealing gasket. When the flow path is closed, the valve core compresses the protective member and retracts into the sliding cavity, but the spring always maintains the contact between the protective member and the valve core, forming a dynamic protective barrier to achieve sealing gasket protection under all operating conditions.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and specifically relates to a one-way valve. Background Technology

[0002] In the fields of fluid transportation, such as petroleum and chemical industries, check valves are key components for controlling the unidirectional flow of fluids, and their sealing performance and reliability directly affect system safety. Traditional check valves face the following technical challenges in practical applications:

[0003] In existing flow control valves, the gaskets are mostly exposed in the flow channel. When high-pressure fluids (such as drilling mud or corrosive chemical media) flow through, the gaskets are continuously subjected to erosion and cavitation, resulting in surface grooves and elasticity degradation within a short period of time. For example, in oil drilling operations, the average replacement cycle for ordinary rubber gaskets is only 15-30 days, and frequent downtime for maintenance seriously affects drilling efficiency. Utility Model Content

[0004] This utility model addresses the problems of the prior art by providing a one-way valve, the specific technical solution of which is as follows:

[0005] A one-way valve includes a valve body, a valve seat, and a valve core. The valve seat is installed in the valve body and forms a flow path. The valve core is disposed on one side of the valve seat and controls the opening and closing of the flow path. A sealing gasket is provided on the end face of the valve seat facing the valve core and surrounds the outlet. In the installed state, the sealing gasket is compressed and deformed and fills the sealing surface of the valve seat and the valve core.

[0006] As a further technical solution of this utility model, it also includes two sets of protective components, which are spaced apart on the inner and outer sides of the sealing gasket. Each protective component includes a sliding cavity, a second spring, and a protective member. The sliding cavity is opened on the valve seat, and the protective member is slidably connected in the sliding cavity. The second spring is pre-compressed in the sliding cavity and drives the protective member to extend. Both sets of protective members are inclined towards each other, and the extended parts fit together to form a protective space for the sealing gasket.

[0007] As a further technical solution of this utility model, the valve core surface is provided with an annular groove corresponding to the sealing gasket. In the installed state, the sealing gasket deforms and fills into the annular groove.

[0008] As a further technical solution of this utility model, it also includes a connector, which includes a telescopic rod connected between the valve core and the valve seat. When the valve core moves, the telescopic rod self-extensions and restricts the translation of the valve core.

[0009] As a further technical solution of this utility model, the connecting member includes a spring, which is pre-stretched and connected between the valve seat and the valve core to drive the valve core to continuously adhere to the valve seat under normal conditions to keep the flow path closed.

[0010] The beneficial effects of this utility model are as follows:

[0011] (1) Dynamic sealing protection mechanism of dual-protection components;

[0012] Protective components are arranged at intervals on both the inner and outer sides of the sealing gasket. Each set of components consists of a sliding cavity, a pre-compression spring, and an inclined protective component. Under normal conditions, the protective components fit together to form a closed protective space.

[0013] When the flow path is open, the protective component continuously blocks the direct contact between the medium and the sealing gasket under the drive of the second spring, avoiding the wear of the sealing gasket caused by the high pressure fluid.

[0014] When the flow path is closed, the valve core compresses the protective component and retracts into the sliding cavity, but the second spring always maintains the contact between the protective component and the valve core, forming a dynamic protective barrier to achieve gasket protection under all working conditions.

[0015] (2) Deformation coordination design of the annular groove and the sealing gasket;

[0016] The valve core surface has an annular groove corresponding to the sealing gasket. During installation, the sealing gasket is deformed by pressure and fills into the annular groove. The annular groove limits the deformation range of the sealing gasket, avoids plastic deformation caused by excessive compression, and extends the elastic life of the sealing gasket. The deformed sealing gasket and the annular groove form an "embedded seal", which increases the complexity of the medium leakage path and improves the sealing reliability.

[0017] (3) Precise motion control of the telescopic rod and spring 1;

[0018] The connector includes a telescopic rod and a pre-tensioned spring. The former restricts the translational movement of the valve core, while the latter drives the valve core to be in constant contact with the valve seat. The telescopic rod ensures that the valve core moves linearly along the axial direction, avoiding uneven wear of the sealing surface caused by eccentricity in traditional ball valves. The pre-tensioned spring provides a constant reset force, which can maintain a tight fit between the valve core and the valve seat even under media vibration conditions, solving the reset failure problem caused by spring fatigue in traditional single-flow valves. Attached Figure Description

[0019] Figure 1 A schematic diagram of a single-flow valve in the open state is shown;

[0020] Figure 2 It shows Figure 1 Enlarged structural diagram at point A in the middle;

[0021] Figure 3 A schematic diagram of a single-flow valve in a closed state is shown.

[0022] Legend:

[0023] 100. Valve body; 200. Valve seat; 300. Valve core; 310. Annular groove; 400. Connecting part; 410. Telescopic rod; 420. Spring 1; 500. Sealing gasket; 600. Protective component; 610. Sliding cavity; 620. Spring 2; 630. Protective component; 640. Protective space. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0025] Figure 1 A schematic diagram of a single-flow valve in the open state is shown; Figure 2 It shows Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 A schematic diagram of a single-flow valve in a closed state is shown.

[0026] Figure 1 and Figure 3 The present invention relates to a one-way valve, comprising a valve body 100, a valve seat 200, a valve core 300, and a connector 400. The valve seat 200 is installed inside the valve body 100 and forms a flow path. The valve core 300 is disposed on one side of the valve seat 200 and controls the opening and closing of the flow path. The connector 400 is connected between the valve core 300 and the valve seat 200 so that the valve core 300 fits against the valve seat 200, thereby achieving a normally closed flow path. When the water end is opened, the high-pressure fluid pushes open the valve core 300, creating a gap between the valve core 300 and the valve seat 200, through which the fluid flows out. When the water end is closed, the connector 400 resets and fits against the valve seat 200 again to close the flow path, thereby achieving one-way flow of fluid.

[0027] See also Figure 1 The connector 400 includes a telescopic rod 410 and a spring 420. When the valve core 300 moves, the telescopic rod 410 self-extensions and restricts the translation of the valve core 300. That is, the movement trajectory of the valve core 300 is a translational movement. When the flow path is open, it translates away from the valve seat 200. When the flow path is closed, it translates back to its original position and fits against the valve seat 200. The spring 420 is pre-stretched and connected between the valve seat 200 and the valve core 300. That is, the spring 420 continuously applies a tensile force to the valve core 300 to drive the valve core 300 to continuously fit against the valve seat 200 under normal conditions, forming the flow path closed under normal conditions.

[0028] Figure 2In the middle, a sealing gasket 500 is provided on the end face of the valve seat 200 facing the valve core 300 and surrounds the liquid outlet. In the installed state, the sealing gasket 500 is compressed and deformed and fills the sealing surface of the valve seat 200 and the valve core 300. Utilizing the deformable characteristics of the sealing gasket 500, it can fill the mating surface between the valve seat 200 and the valve core 300 to compensate for the sealing surface being limited by flatness.

[0029] See also Figure 2 It also includes two sets of protective components 600, which are spaced apart on the inner and outer sides of the sealing gasket 500. Each protective component 600 includes a sliding cavity 610, a second spring 620, and a protective member 630. The sliding cavity 610 is formed on the valve seat 200, and the protective member 630 is slidably connected inside the sliding cavity 610. The second spring 620 is pre-compressed in the sliding cavity 610 and drives the protective member 630 to extend. Both sets of protective members 630 are inclined towards each other, and their extended portions fit together to form a protective space 640 for the sealing gasket 500. This indicates that the inner protective element 630 extends outward at an angle, and the outer protective element 630 extends inward at an angle. Under normal conditions, the two protective elements 630 extend and contact each other, thus forming a protective space 640 for a protective sealing gasket 500. After the flow path is opened, the two protective elements 630 can block the medium from contacting the sealing gasket 500, prevent the medium from continuously flushing the sealing gasket 500, extend the service life of the sealing gasket 500, and ensure the sealing effect between the valve seat 200 and the valve core 300 after the flow path is closed. The mating ends of the two protective elements 630 match each other to ensure the sealing effect when they are in contact.

[0030] It should be further explained that during the reset process of the valve core 300, the protective component 630 is pressed back into the sliding cavity 610 by the valve core 300. During this process, the protective component 630 is always in contact with the valve core 300 by the drive of the second spring 620. Therefore, the cooperation between the two protective components 630 and the valve core 300 can still maintain the protective space 640 to ensure that the sealing gasket 500 does not come into contact with the medium during the opening and closing of the flow path.

[0031] The valve core 300 has an annular groove 310 corresponding to the sealing gasket 500 on its surface. In the installed state, the sealing gasket 500 deforms and fills into the annular groove 310. The annular groove 310 is used to control the degree of deformation of the sealing gasket 500 and extend the service life of the sealing gasket 500.

[0032] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A one-way valve, comprising a valve body (100), a valve seat (200), and a valve core (300), wherein the valve seat (200) is installed within the valve body (100) and forms a flow path, and the valve core (300) is disposed on one side of the valve seat (200) and controls the opening and closing of the flow path, characterized in that: The valve seat (200) is provided with a sealing gasket (500) surrounding the outlet on the end face facing the valve core (300). In the installed state, the sealing gasket (500) is squeezed and deformed to fill and seal the sealing surfaces of the valve seat (200) and the valve core (300).

2. A flow valve according to claim 1, characterized in that: It also includes two sets of protective components (600), which are spaced apart on the inner and outer sides of the sealing gasket (500). Each protective component (600) includes a sliding cavity (610), a second spring (620), and a protective member (630). The sliding cavity (610) is opened on the valve seat (200), and the protective member (630) is slidably connected in the sliding cavity (610). The second spring (620) is pre-compressed in the sliding cavity (610) and drives the protective member (630) to extend. Both sets of protective members (630) are inclined towards each other, and the extended parts fit together to form a protective space (640) for the sealing gasket (500).

3. A flow valve according to claim 2, characterized in that: The valve core (300) has an annular groove (310) corresponding to the sealing gasket (500) on its surface. In the installed state, the sealing gasket (500) deforms and fills the annular groove (310).

4. A flow valve according to claim 3, characterized in that: It also includes a connector (400), which includes a telescopic rod (410) connected between the valve core (300) and the valve seat (200). When the valve core (300) moves, the telescopic rod (410) automatically extends and retracts to restrict the translation of the valve core (300).

5. A one-way valve according to claim 4, characterized in that: The connector (400) includes a spring (420), which is pre-stretched and connected between the valve seat (200) and the valve core (300) to drive the valve core (300) to continuously adhere to the valve seat (200) under normal conditions to keep the flow path closed.

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