Backflow control valve structure and working method thereof

Abstract

The backflow control valve structure comprises a valve body, a fluid inner cavity extending in the axial direction is formed 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 invention relates to a reflux control valve structure and a working method thereof. Background Art

[0002] The reflux control valve is used to be installed on the water inlet end of a vertical multi-stage pump or the suction pipe end of various pumps. When working, the valve core automatically floats and opens with the flow of liquid; when stopping working, the valve core falls back and closes with the reflux of liquid. In the prior art, the contact area between the valve core and the peripheral side of the valve body is large, which makes the friction resistance of the valve core in the axial translation process of opening and closing large, which easily leads to the valve core opening and closing not being smooth, and also affects the sealing performance of the valve. Summary of the invention

[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 and a working method thereof.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a reflux control valve structure, including a valve body, an axially extending fluid cavity is arranged inside the valve body between its water inlet and water outlet, a valve core is arranged in the fluid cavity for axially reciprocating translation to open and close the water inlet, 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, an embedded convex ring is fixed on the inner circle of the peripheral wall, 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 pressing 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 in an L-shape, 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.

[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 the linear and 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] 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 with the flow of liquid, and when stopping working, the pressure-boosting valve core falls back and closes with the reflux of liquid, during which the valve core only contacts the cavity wall of the fluid cavity by means of guide spokes.

[0013] Preferably, the guide spokes are in line-surface contact with the cavity wall of the fluid cavity.

[0014] Compared with the prior art, the present invention has the following beneficial effects: since the outer periphery of the valve core of the reflux control valve contacts the wall of the fluid inner cavity through a plurality of circumferentially evenly distributed guide spokes, and the length directions of the guide spokes are parallel to the axial direction of the fluid inner 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 translational action of the valve core is smoother; on the other hand, the guide spokes realize the axial reciprocating translational guidance of the valve core, making the opening and closing actions of the valve core more precise and stable, and improving the sealing performance of the valve as a whole.

[0015] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the front view of embodiment 1 of the present invention.

[0017] Figure 2 It is a top view of embodiment 1 of the present invention.

[0018] Figure 3 This is a front view of the valve body of Example 1 of the present invention.

[0019] Figure 4 This is a bottom view of the valve body of Example 1 of the present invention.

[0020] Figure 5 It is a top view of the valve core of embodiment 1 of the present invention.

[0021] Figure 6 for Figure 5 AA section view.

[0022] Figure 7 It is a three-dimensional diagram of the valve core of embodiment 1 of the present invention.

[0023] Figure 8 This is the front view of embodiment 2 of the present invention.

[0024] Fig. 9 It is a top view of embodiment 2 of the present invention.

[0025] Fig.10 This is the front view of embodiment 3 of the present invention.

[0026] Fig.11 This is a front view of the valve body of embodiment 3 of the present invention.

[0027] Fig.12 This is a top view of the valve body of embodiment 3 of the present invention.

[0028] Fig.13 It is a top view of the mesh cover of embodiment 3 of the present invention.

[0029] Fig.14 This is a front view of the mesh cover of Example 3 of the present invention.

[0030] Fig.15 This is an application diagram of Example 1 of the present invention. Figure 1 .

[0031] Fig.16 This is an application diagram of Example 1 of the present invention. Figure 2 .

[0032] Fig.17 This is a schematic diagram of the application of Example 2 of the present invention.

[0033] In the figure: valve body 1, water inlet 2, water outlet 3, fluid 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 grid 28, top ring 29, flow gap 30. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] 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 meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0036] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] like Figures 1 to 7 As shown, this embodiment 1 provides a reflux control valve structure, including a valve body 1, wherein an axially extending fluid cavity 4 is arranged inside the valve body between its water inlet 2 and water outlet 3, and a valve core 5 is arranged 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, wherein 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.

[0038] In Example 1 of the present invention, 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, and a sealing gasket 8 is provided between the end cover and the water inlet.

[0039] 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 an embedded concave ring 10 embedded with the embedded convex ring is provided on the outer periphery of the end cover.

[0040] 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.

[0041] 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 valve core to respond quickly and close.

[0042] In Example 1 of the present invention, the guide spokes are all in an "L" shape, 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 29, and the outer diameter of the top ring is larger than the outer diameter of the end cover.

[0043] In Example 1 of the present invention, the guide side portions of the guide spokes in contact with the cavity wall of the fluid cavity are all arc side portions, so as to facilitate the linear contact between the arc side portions and the cavity wall of the fluid cavity, and the friction force is further reduced.

[0044] In the first embodiment of the present invention, the gaps between adjacent guide spokes form flow gaps 30 .

[0045] In the first embodiment of the present invention, 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.

[0046] 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 through holes 17 for screws 16.

[0047] like Figures 1 to 9 As shown in 15-17, the embodiments 1 and 2 of the present invention are mainly applied to the reflux control valve for the vertical multistage pump 18, which is installed on the water inlet end of the lower cover of the pump. When it is not in use, the valve core of the reflux control valve is closed as the liquid refluxes and pressurizes, keeping the room in a vacuum state; when it is turned on, the impeller starts to work and the valve core automatically floats and opens as the pressure process liquid flows.

[0048] 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 multistage 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.

[0049] For Example 2, Fig.17 As shown, the control valve is installed in a sleeve-type manner. When the water inlet end of the vertical multistage 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 are passed through the installation through holes and then screwed and locked into the pump lower cover.

[0050] 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 mouth ring 24, and a sealing ring 25.

[0051] In Example 3 of the present invention, the top cover opening of the mesh cover is screwed to the bottom side of the valve body through threads, and the inner peripheral wall of the cover opening of the mesh cover has a step 26, the valve opening ring is supported on the step, and the sealing ring is located between the valve opening ring and the bottom end of the valve body. When the mesh cover is screwed and tightened with the valve body, the step presses the valve opening ring and the sealing ring tightly against the bottom end of the valve body to ensure sealing.

[0052] In Example 3 of the present invention, the water inlet is arranged on the valve opening ring and is connected to the bottom opening of the valve body.

[0053] In Example 3 of the present invention, 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.

[0054] In Example 3 of the present invention, a plurality of filtering through holes 27 are provided at the bottom of the mesh cover, and a plurality of filtering grilles 28 are evenly distributed on the circumference of the side of the mesh cover.

[0055] In the third embodiment of the present invention, when the embodiment of the present invention is installed at the end of the water suction pipe, the internal threaded hole of the external hexagonal nut on the top of the valve body is screwed with the end of the water suction pipe, and the water suction pipe and the control valve can be thrown into the water as a whole, and the mesh cover is used to filter some large-volume impurities. When working, the valve core automatically floats and opens with the flow of liquid, and when stopping working, the valve core falls back and closes with the pressurization of the liquid, protecting the water suction pipe and maintaining a vacuum state in the pump.

[0056] In embodiments 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 with the flow of liquid, and when stopping working, the booster valve core falls back and closes with the reflux of liquid. During this period, the valve core only relies on the guide spokes to contact the cavity wall of the fluid cavity.

[0057] In the embodiments 1-3 of the present invention, the guide spokes are in line-surface contact with the wall of the fluid inner cavity. On the one hand, the contact area between the valve core and the peripheral side of the valve body is reduced, the friction is reduced, and the axial reciprocating translation of the valve core is smoother; on the other hand, the guide spokes guide the axial reciprocating translation of the valve core, making the opening and closing actions of the valve core more precise and stable, and improving the sealing performance of the valve as a whole.

[0058] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A reflux control valve structure, comprising a valve body, wherein an axially extending fluid cavity is provided inside 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 circumference 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 comprises an end cover for opening and closing a water inlet, the outer diameter of the end cover is smaller than the inner diameter of the fluid cavity, and a sealing gasket is arranged 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, an embedded convex ring is fixed on the inner circle of the peripheral wall, and an embedded concave ring embedded with the embedded convex ring is provided on the outer periphery of the end cover.

4. The reflux control valve structure according to claim 2, characterized in that: A sealing convex ring is fixedly arranged 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 in an L-shaped shape, wherein the bottom ends of several guide spokes are fixedly arranged on 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 the linear and 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.

9. A method for operating the reflux control valve structure according to any one of claims 1 to 8, characterized in that: Proceed in the following steps: when working, the valve core automatically floats and opens with the flow of liquid; when stopping working, the booster valve core falls back and closes with the reflux of liquid, during which the valve core contacts the cavity wall of the fluid cavity only by the guide spokes.

10. The working method of the reflux control valve structure according to claim 9, characterized in that: The guide spokes are in line-surface contact with the cavity wall of the fluid cavity.

Images