Backflow control valve structure

Abstract

The utility model relates to a backflow control valve structure which comprises a valve body, a fluid inner cavity extending in the axial direction is arranged between a water inlet and a water outlet in the valve body, a valve element used for opening and closing the water inlet in an axial reciprocating translation mode is arranged in the fluid inner cavity, and a plurality of guide spokes are evenly distributed on the periphery of the periphery of the valve element. The guide spokes make contact with the cavity wall of the fluid inner cavity, and the length directions of the guide spokes are parallel to the axial direction of the fluid inner cavity. On one hand, the contact area of the valve element and the peripheral side of the valve body is reduced, friction force is reduced, and the axial reciprocating translation action of the valve element is smoother; and on the other hand, axial reciprocating translation guiding of the valve element is achieved through the guiding spoke, the opening and closing actions of the valve element are more accurate and stable, and the sealing performance of the valve is overall improved.

Description

Technical Field

[0001] The utility model relates to a reflux control valve structure. Background Art

[0002] A reflux control valve is designed to be installed on the water inlet of a vertical multi-stage pump or the suction pipe of various pumps. During operation, the valve core automatically floats open as liquid flows through it; when not in operation, the valve core descends and closes as liquid backflows and increases pressure. In existing designs, the contact area between the valve core and the valve body is relatively large, resulting in significant frictional resistance during the axial translation of the valve core during opening and closing. This can lead to unsmooth opening and closing of the valve core and compromise the valve's sealing performance. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a reflux control valve structure.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a reflux control valve structure, including a valve body, an axially extending fluid cavity is provided inside the valve body between its water inlet and water outlet, a valve core is provided in the fluid cavity for axially reciprocating translation to open and close the water inlet, and a plurality of guide spokes are evenly distributed on the circumference of the outer peripheral portion of the valve core, the guide spokes are in contact with the cavity wall of the fluid cavity, and the length direction of the guide spokes is parallel to the axial direction of the fluid cavity.

[0005] Preferably, the valve core includes an end cover for opening and closing the water inlet, the outer diameter of the end cover is smaller than the inner diameter of the fluid cavity, and a sealing gasket is provided between the end cover and the water inlet.

[0006] Preferably, the sealing gasket is arranged on the bottom surface of the end cover, and the peripheral wall of the sealing gasket is sleeved on the outer periphery of the end cover, the inner circle of the peripheral wall is fixed with an embedded convex ring, and the outer periphery of the end cover has an embedded concave ring embedded with the embedded convex ring.

[0007] Preferably, a sealing convex ring is fixedly provided on the edge of the water inlet inside the valve body to facilitate mutual pressure with the sealing gasket of the end cover.

[0008] Preferably, the top surface of the end cover is coaxially recessed downward to form a groove.

[0009] Preferably, the guide spokes are all L-shaped, wherein the bottom ends of several guide spokes are fixed to the outer periphery of the end cover, and the top ends of several guide spokes are fixedly connected as a whole through a top ring, and the outer diameter of the top ring is larger than the outer diameter of the end cover.

[0010] Preferably, the guide side portions of the guide spokes that contact the cavity wall of the fluid cavity are all arc side portions, so as to facilitate line-surface contact between the arc side portions and the cavity wall of the fluid cavity.

[0011] Preferably, the gaps between adjacent guide spokes form flow gaps.

[0012] Compared with the prior art, the utility model has the following beneficial effects: since the outer periphery of the valve core of the reflux control valve contacts the cavity wall of the fluid cavity through a plurality of circumferentially evenly distributed guide spokes, and the length direction of the guide spokes are parallel to the axial direction of the fluid cavity, therefore: on the one hand, the contact area between the valve core and the circumferential side of the valve body is reduced, the friction force is reduced, and the axial reciprocating translation action of the valve core is smoother; on the other hand, the guide spokes realize the axial reciprocating translation guidance of the valve core, making the opening and closing action of the valve core more precise and stable, and improving the sealing performance of the valve as a whole.

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the front view of Example 1 of the utility model.

[0015] Figure 2 This is a top view of Example 1 of the utility model.

[0016] Figure 3 This is a front view of the valve body of Example 1 of the present utility model.

[0017] Figure 4 This is a bottom view of the valve body of Example 1 of the present utility model.

[0018] Figure 5 This is a top view of the valve core of Example 1 of the present utility model.

[0019] Figure 6 for Figure 5 AA cross-sectional view.

[0020] Figure 7 This is a three-dimensional diagram of the valve core of Example 1 of the present utility model.

[0021] Figure 8 This is the main view of Example 2 of the present utility model.

[0022] Figure 9 This is a top view of Example 2 of the present utility model.

[0023] Figure 10 This is the main view of Example 3 of the present utility model.

[0024] Figure 11 This is a front view of the valve body of Example 3 of the present utility model.

[0025] Figure 12 This is a top view of the valve body of Example 3 of the present utility model.

[0026] Figure 13 This is a top view of the mesh cover of Example 3 of the present utility model.

[0027] Figure 14 This is a front view of the mesh cover of Example 3 of the present utility model.

[0028] Figure 15 This is an application diagram of Example 1 of the utility model Figure 1 .

[0029] Figure 16 This is an application diagram of Example 1 of the utility model Figure 2 .

[0030] Figure 17 This is an application diagram of Example 2 of the present utility model.

[0031] In the figure: valve body 1, water inlet 2, water outlet 3, fluid inner cavity 4, valve core 5, guide spokes 6, end cover 7, sealing gasket 8, embedded convex ring 9, embedded concave ring 10, sealing convex ring 11, sink 12, external thread 13, external hexagonal nut 14, connecting lug 15, screw 16, mounting through hole 17, vertical multi-stage pump 18, impeller 19, connecting port 20, pump lower cover 21, water inlet 22, mesh cover 23, valve port ring 24, sealing ring 25, step 26, filter through hole 27, filter grille 28, top ring 29, flow gap 30. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] like Figures 1 to 7As shown, this embodiment 1 provides a reflux control valve structure, including a valve body 1, an axially extending fluid cavity 4 is provided inside the valve body between its water inlet 2 and water outlet 3, a valve core 5 is provided in the fluid cavity for axially reciprocating translation to open and close the water inlet, and a plurality of guide spokes 6 are evenly distributed on the circumference of the outer peripheral portion of the valve core, the guide spokes are in contact with the cavity wall of the fluid cavity, and the length direction of the guide spokes is parallel to the axial direction of the fluid cavity.

[0036] In Example 1 of the present utility model, the valve core includes an end cover 7 for opening and closing the water inlet. The outer diameter of the end cover is smaller than the inner diameter of the fluid cavity. A sealing gasket 8 is provided between the end cover and the water inlet.

[0037] In Example 1 of the present invention, the sealing gasket is arranged on the bottom surface of the end cover, and the peripheral wall of the sealing gasket is sleeved on the outer periphery of the end cover. An embedded convex ring 9 is fixed on the inner circle of the peripheral wall, and the outer periphery of the end cover has an embedded concave ring 10 embedded with the embedded convex ring.

[0038] In Example 1 of the present invention, a sealing convex ring 11 is fixedly provided on the edge of the water inlet inside the valve body to facilitate mutual pressing with the sealing gasket of the end cover.

[0039] In Example 1 of the present invention, a depression 12 is coaxially recessed downward on the top surface of the end cover. When the liquid refluxes and increases pressure, the depression is conducive to the instantaneous convergence of the liquid reflux, so that the instantaneous pressure increase of the reflux liquid on the valve core is concentrated, which facilitates the rapid response and closure of the valve core.

[0040] In Example 1 of the present invention, the guide spokes are all shaped like an "L", wherein the bottom ends of several guide spokes are fixed to the outer periphery of the end cover, and the top ends of several guide spokes are fixedly connected as a whole through a top ring 29, and the outer diameter of the top ring is larger than the outer diameter of the end cover.

[0041] In Example 1 of the present invention, the guide side portions of the guide spokes that contact the cavity wall of the fluid cavity are all arc side portions, so as to facilitate line-surface contact between the arc side portions and the cavity wall of the fluid cavity, thereby further reducing friction.

[0042] In embodiment 1 of the present invention, the gaps between adjacent guide spokes form flow gaps 30 .

[0043] In Example 1 of the present utility model, the valve body is provided with an external thread 13 on the outer peripheral wall near the water outlet, and an external hexagonal nut 14 is coaxially fixed on the outer bottom end near the water inlet.

[0044] like Figures 8 and 9As shown, in Example 2 of the present invention, unlike Example 1, the valve body is not provided with external threads and external hexagonal nuts, but the valve body is evenly fixed with a plurality of connecting lugs 15 on the outer peripheral wall near the water outlet, and the connecting lugs are provided with mounting holes 17 for screws 16.

[0045] like Figures 1 to 9 As shown in Figures 15-17, Examples 1 and 2 of the present invention are primarily used as a reflux control valve for a vertical multi-stage pump 18, mounted on the water inlet end of the pump's lower cover. When not in use, the reflux control valve's spool closes as liquid refluxes and pressurizes, maintaining a vacuum in the chamber. When the pump is turned on, the impeller begins operating, and the spool automatically floats open as liquid flows through the pressure range.

[0046] For Example 1, Figures 15 and 16 As shown, the control valve is threadedly installed on the lower connection port of the impeller 19 inside the vertical multi-stage pump, wherein the external thread of the valve body is connected to the internal thread of the connection port 20 below the impeller, and then tightened with an external hexagonal nut.

[0047] For Example 2, Figure 17 As shown, the control valve adopts a sleeve-type installation. When the water inlet end of the vertical multi-stage pump is located on the pump lower cover 21 below the impeller, the valve body is embedded in the pump water inlet 22 and the screws of the connecting lugs pass through the installation through holes and are screwed and locked into the pump lower cover.

[0048] like Figures 10-14 As shown, in Example 3 of the present invention, unlike Examples 1 and 2, Example 3 of the present invention is mainly applied to various pump suction pipe ends, and the structure also includes a mesh cover 23, a valve port ring 24, and a sealing ring 25.

[0049] In Example 3 of the present invention, the top cover of the mesh cover is threadedly connected to the bottom side of the valve body, and the inner peripheral wall of the mesh cover has a step 26. The valve ring is supported on the step, and the sealing ring is located between the valve ring and the bottom end of the valve body. When the mesh cover is screwed and tightened to the valve body, the step presses the valve ring and the sealing ring against the bottom end of the valve body, ensuring a tight seal.

[0050] In Example 3 of the present utility model, the water inlet is arranged on the valve ring and is connected to the bottom opening of the valve body.

[0051] In Example 3 of the present utility model, an external hexagonal nut is coaxially fixedly provided on the outer top end of the valve body near the water outlet, and the internal threaded hole of the external hexagonal nut is connected to the water outlet.

[0052] In Example 3 of the present invention, a plurality of filter holes 27 are provided at the bottom of the mesh cover, and a plurality of filter grilles 28 are evenly distributed around the circumference of the side of the mesh cover.

[0053] In Example 3 of the present invention, when installed at the end of the suction pipe, the internal threaded hole of the external hexagonal nut on the top of the valve body is threadedly connected to the suction pipe end. The suction pipe and control valve can be dropped into water. The mesh cover is used to filter some large impurities. During operation, the valve core automatically floats open as the liquid flows. When stopped, the valve core falls back and closes as the liquid pressure increases, protecting the suction pipe and maintaining a vacuum in the pump.

[0054] In Examples 1-3 of the present invention, a working method of a reflux control valve structure is carried out according to the following steps: when working, the valve core automatically floats and opens as the liquid flows through it, and when stopping working, the booster valve core falls back and closes as the liquid refluxes. During this period, the valve core only relies on the guide spokes to contact the cavity wall of the fluid cavity.

[0055] In Examples 1-3 of the present invention, the guide spokes provide linear or surface contact with the walls of the fluid chamber. This reduces the contact area between the valve core and the circumference of the valve body, lowering friction and enabling smoother axial reciprocating translation of the valve core. Furthermore, the guide spokes guide the axial reciprocating translation of the valve core, making its opening and closing movements more precise and stable, and overall improving the valve's sealing performance.

[0056] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation thereto. Any person skilled in the art may utilize the above disclosure to modify or remodel the present invention into equivalent embodiments. However, any simple modification, equivalent variation, or modification of the above embodiment that does not depart from the technical content of the present invention and is based on the technical essence of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. A backflow control valve structure, comprising a valve body, wherein an axially extending fluid cavity is provided within the valve body between a water inlet and a water outlet, and a valve core is provided in the fluid cavity for axially reciprocating translation to open and close the water inlet, characterized in that: A plurality of guide spokes are evenly distributed on the circumference of the outer periphery of the valve core. The guide spokes are in contact with the cavity wall of the fluid cavity, and the length directions of the guide spokes are parallel to the axial direction of the fluid cavity.

2. The reflux control valve structure according to claim 1, characterized in that: The valve core includes an end cover for opening and closing the water inlet. The outer diameter of the end cover is smaller than the inner diameter of the fluid cavity. A sealing gasket is provided between the end cover and the water inlet.

3. The reflux control valve structure according to claim 2, characterized in that: The sealing gasket is arranged on the bottom surface of the end cover, and the peripheral wall of the sealing gasket is sleeved on the outer periphery of the end cover. The inner circle of the peripheral wall is fixed with an embedded convex ring, and the outer periphery of the end cover has an embedded concave ring embedded with the embedded convex ring.

4. The reflux control valve structure according to claim 2, characterized in that: A sealing convex ring is fixedly provided on the edge of the water inlet inside the valve body to facilitate mutual pressing with the sealing gasket of the end cover.

5. The reflux control valve structure according to claim 2, characterized in that: The top surface of the end cover is coaxially recessed downward to form a sink.

6. The reflux control valve structure according to claim 2, characterized in that: The guide spokes are all L-shaped, wherein the bottom ends of several guide spokes are fixed to the outer periphery of the end cover, and the top ends of several guide spokes are fixedly connected as a whole via a top ring, and the outer diameter of the top ring is larger than the outer diameter of the end cover.

7. The reflux control valve structure according to claim 1, characterized in that: The guide side portions of the guide spokes that contact the cavity wall of the fluid cavity are all arc side portions, so as to facilitate line-surface contact between the arc side portions and the cavity wall of the fluid cavity.

8. The reflux control valve structure according to claim 1, characterized in that: The gaps between adjacent guide spokes form flow gaps.

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