A check valve

Abstract

The utility model belongs to valve technical field, especially point to a check valve, including valve casing, the valve casing has the valve cavity, water inlet channel and water outlet channel, is provided with the valve plate in the valve cavity, the plugging end surface of this valve plate can block the inner port of water inlet channel, the driving end surface of valve plate and the one end of compression spring abut, the other end of compression spring and support abut, the outer edge of valve plate is distributed with two or more than two avoidance notches in the circumference, the avoidance notches and the inner wall surface between valve cavity form the flow -increasing space for fluid to pass. The utility model adds a plurality of avoidance notches on the outer edge of valve plate, makes part of fluid can enter the valve cavity in advance through flow -increasing space, realizes early drainage and significantly reduces opening pressure, thereby can select the compression spring of softer rigidity on design, further reduces the minimum pressure required for valve opening simultaneously, protects water pump and prolongs its service life, in addition, the design of flow -increasing space also makes the overall flow of valve body effectively increase.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and specifically refers to a check valve. Background Technology

[0002] A check valve, also known as a one-way valve, is an automatic valve used to prevent fluid from flowing back in a pipeline. It opens and closes the valve disc by using the fluid's own kinetic energy and pressure difference. It is widely used in water supply and drainage, HVAC, industrial fluid systems, and outlet pipelines of various pumps.

[0003] In existing technologies, check valves suffer from low flow rate and high starting pressure. This is mainly because the valve plate of existing check valves is usually a complete disc structure. Not only does it require a large water pressure to overcome the spring pushing the valve plate open, but the fluid can only flow through the annular gap between the outer edge of the valve plate and the inner wall of the valve cavity. This flow channel is relatively narrow and tortuous, which creates a large local resistance to the fluid, resulting in limited flow capacity, large pressure loss, and reduced transport efficiency of the entire pipeline system. Summary of the Invention

[0004] The purpose of this utility model is to provide a check valve with multiple clearance notches added to the outer edge of the valve plate. This not only allows some fluid to enter the valve cavity in advance through the flow-increasing space, thus achieving early discharge and significantly reducing the opening pressure, but also the design of the flow-increasing space effectively increases the overall flow rate of the valve body.

[0005] This utility model is implemented as follows: A check valve includes a valve body, the valve body having a valve cavity, and an inlet channel and an outlet channel whose inner ports are connected to the valve cavity. A valve plate is disposed in the valve cavity, which can move away from or closer to the inlet channel. The sealing end face of the valve plate can block the inner port of the inlet channel. The driving end face of the valve plate abuts against one end of a compression spring, and the other end of the compression spring abuts against a bracket fixed in the valve cavity. Two or more clearance notches are distributed circumferentially along the outer edge of the valve plate, and the clearance notches and the inner wall of the valve cavity form a flow-increasing space for fluid to pass through.

[0006] In the aforementioned check valve, the valve body includes a valve seat and a water inlet connector, both having an inner hole. The water inlet channel is the inner hole of the water inlet connector. The inner end of the water inlet connector is connected to the assembly port of the valve seat via a thread. The valve cavity is formed between the inner end of the water inlet connector and the assembly end of the inner hole of the valve seat. The water outlet channel is the water outlet end of the inner hole of the valve seat.

[0007] In the aforementioned check valve, a sealing ring is provided on the inner end face of the water inlet connector around the water inlet channel, and the sealing end face of the valve plate can abut against and fit against the inner end face of the sealing ring to achieve the sealing of the water inlet channel by the valve plate.

[0008] In the aforementioned check valve, the support includes a central plate and several spokes evenly distributed circumferentially on the central plate. The outer ends of the spokes are connected to the inner wall of the valve cavity and form an integral structure. The corresponding end of the compression spring abuts against the central plate.

[0009] In the aforementioned check valve, the center of the central plate arches along its axial direction to form a positioning protrusion, and the driving end face of the valve plate is provided with an annular limiting groove. One end of the compression spring is fitted onto the positioning protrusion, and the other end abuts against the annular limiting groove.

[0010] The outstanding advantages of this utility model compared to the prior art are: This utility model has a simple structure and reasonable design. Multiple clearance notches are added to the outer edge of the valve plate, allowing some fluid to enter the valve cavity in advance through the flow enhancement space, thus achieving early discharge and significantly reducing the opening pressure. This allows for the selection of a softer compression spring, while also further reducing the minimum pressure required to open the valve, protecting the water pump and extending its service life. In addition, the design of the flow enhancement space also effectively increases the overall flow rate of the valve body. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the overall structure of this utility model. Figure 1 ; Figure 2 This is a cross-sectional view of the overall structure of this utility model. Figure 2 ; Figure 3 This is a perspective view of the valve plate of this utility model; Figure 4 This is a perspective view of the valve seat of this utility model.

[0012] In the diagram: 1. Valve body; 2. Valve cavity; 3. Inlet channel; 4. Outlet channel; 5. Valve plate; 6. Compression spring; 7. Bracket; 8. Clearance notch; 9. Valve seat; 10. Inlet connector; 11. Sealing ring platform; 12. Center plate; 13. Spokes; 14. Positioning protrusion; 15. Annular limiting groove. Detailed Implementation

[0013] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —4: A check valve includes a valve body 1, the valve body 1 having a valve cavity 2, and an inlet channel 3 and an outlet channel 4, both of which are connected to the valve cavity 2. A valve plate 5 is provided in the valve cavity 2, which can move away from or closer to the inlet channel 3. The sealing end face of the valve plate 5 can block the inner port of the inlet channel 3. The driving end face of the valve plate 5 abuts against one end of a compression spring 6, and the other end of the compression spring 6 abuts against a bracket 7 fixed in the valve cavity 2. Two or more clearance notches 8 are distributed circumferentially along the outer edge of the valve plate 5, and the clearance notches 8 and the inner wall of the valve cavity 2 form a flow-increasing space for fluid to pass through.

[0014] This utility model has a simple structure and reasonable design. Multiple clearance notches 8 are added to the outer edge of the valve plate 5, so that some fluid can enter the valve cavity 2 in advance through the flow enhancement space, thereby achieving early discharge and significantly reducing the opening pressure. Thus, a softer compression spring 6 can be selected in the design. At the same time, the minimum pressure required for valve opening is further reduced, protecting the water pump and extending its service life. In addition, the design of the flow enhancement space also effectively increases the overall flow of the valve body.

[0015] Furthermore, in this embodiment, the specific structure of the valve housing 1 is as follows: the valve housing 1 includes a valve seat 9 and a water inlet connector 10, both having inner holes. The water inlet channel 3 is the inner hole of the water inlet connector 10. The inner end of the water inlet connector 10 is connected to the assembly port of the valve seat 9 by a thread, and the valve cavity 2 is formed between the inner end of the water inlet connector 10 and the assembly end of the inner hole of the valve seat 9. The water outlet channel 4 is the water outlet end of the inner hole of the valve seat 9. In order to ensure that the end faces of the valve plate 5 and the water inlet connector 10 can be sealed and fitted stably and reliably, a sealing ring platform 11 is provided around the water inlet channel 3 on the inner end face of the water inlet connector 10. The sealing end face of the valve plate 5 can abut against and fit against the inner end face of the sealing ring platform 11 to achieve the sealing of the water inlet channel 3 by the valve plate 5.

[0016] Meanwhile, the bracket 7 can be a separate structure from the valve cavity 2, that is, the valve cavity 2 has a limiting step for the bracket 7 to be unidirectionally limited. At this time, the compression spring 6 abuts against the other side of the bracket 7. In this embodiment, the bracket 7 includes a central plate 12 and several spokes 13 evenly distributed on the central plate 12. The outer ends of the spokes 13 are connected to the inner wall of the valve cavity 2 and form an integral structure. This integral structure can be achieved by welding or casting. The corresponding end of the compression spring 6 abuts against the central plate 12.

[0017] Furthermore, in order to ensure that the compression spring 6 is stably connected between the center plate 12 and the valve plate 5, the center of the center plate 12 is arched along its axial direction to form a positioning protrusion 14, and the driving end face of the valve plate 5 is provided with an annular limiting groove 15. One end of the compression spring 6 is fitted on the positioning protrusion 14, and the other end abuts against the annular limiting groove 15.

[0018] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A check valve, characterized in that: The device includes a valve housing (1), which has a valve cavity (2) and an inlet channel (3) and an outlet channel (4) whose inner ports are connected to the valve cavity (2). A valve plate (5) is provided in the valve cavity (2) and can be moved away from or close to the inlet channel (3). The sealing end face of the valve plate (5) can block the inner port of the inlet channel (3). The driving end face of the valve plate (5) abuts against one end of the compression spring (6), and the other end of the compression spring (6) abuts against the bracket (7) fixed in the valve cavity (2). There are two or more clearance notches (8) distributed circumferentially on the outer edge of the valve plate (5). The clearance notches (8) and the inner wall of the valve cavity (2) form a flow-increasing space for fluid to pass through.

2. A check valve according to claim 1, characterized in that: The valve housing (1) includes a valve seat (9) and a water inlet connector (10) both having an inner hole. The water inlet channel (3) is the inner hole of the water inlet connector (10). The inner end of the water inlet connector (10) is connected to the assembly port of the valve seat (9) by a thread. The valve cavity (2) is formed between the inner end of the water inlet connector (10) and the assembly end of the inner hole of the valve seat (9). The water outlet channel (4) is the water outlet end of the inner hole of the valve seat (9).

3. A check valve according to claim 2, characterized in that: The inner end face of the water inlet connector (10) is provided with a sealing ring platform (11) around the water inlet channel (3). The sealing end face of the valve plate (5) can abut against and fit against the inner end face of the sealing ring platform (11) to achieve the sealing of the water inlet channel (3) by the valve plate (5).

4. A check valve according to claim 1, characterized in that: The bracket (7) includes a center plate (12) and several spokes (13) evenly distributed around the center plate (12). The outer ends of the spokes (13) are connected to the inner wall of the valve cavity (2) and form an integral structure. The corresponding end of the compression spring (6) abuts against the center plate (12).

5. A check valve according to claim 4, characterized in that: The center plate (12) arches along its axial direction to form a positioning protrusion (14). The driving end face of the valve plate (5) is provided with an annular limiting groove (15). One end of the compression spring (6) is fitted on the positioning protrusion (14), and the other end abuts against the annular limiting groove (15).

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