Axial-flow type check valve

Abstract

The utility model relates to the field of check valves, in particular to an axial-flow type check valve which comprises a valve body assembly, a valve rod assembly and a valve rod assembly. The supporting assembly is detachably and fixedly connected with the valve body assembly; the valve assembly is detachably and fixedly connected with the supporting assembly; the valve assembly is movably connected with the valve body assembly; the waterproof hammer assembly is fixedly connected with the valve body assembly; the waterproof hammer assembly is movably connected with the supporting assembly. Therefore, the problem that the service life of the pipeline is easily shortened under the action of the water hammer is solved.

Description

Technical Field

[0001] This utility model relates to the field of check valves, and more specifically, to an axial flow check valve. Background Technology

[0002] Axial flow check valves are a specially designed type of check valve. Their core feature is that fluid flows axially (in the same direction as the pipeline) through the valve, rather than along the right-angle or bend path of traditional check valves. This design significantly reduces flow resistance and pressure loss, making it suitable for high-velocity, high-flow-rate systems or systems sensitive to pressure drop. However, because the fluid in the pipeline typically flows at high speeds, when an axial flow check valve is in operation, the fluid is prone to severe water hammer, which can shorten the service life of the pipeline under long-term water hammer effects. Utility Model Content

[0003] To address the problem of reduced service life of pipelines under water hammer, this utility model provides an axial flow check valve, comprising:

[0004] Valve body assembly;

[0005] A support assembly is detachably and fixedly connected to the valve body assembly;

[0006] A valve assembly, wherein the valve assembly is detachably and fixedly connected to the support assembly; and the valve assembly is movably connected to the valve body assembly.

[0007] A waterproof hammer assembly is fixedly connected to the valve body assembly and movably connected to the support assembly.

[0008] In some embodiments, the valve body assembly includes a valve body, a first connecting portion, and a second connecting portion; the valve body has an internal hollow cavity structure with openings at both ends; the first connecting portion is fixedly connected to one open end of the valve body, and the second connecting portion is fixedly connected to the other open end of the valve body; the first connecting portion and the second connecting portion are located outside the hollow cavity of the valve body; the support assembly is detachably fixedly connected to the inner circumferential surface of the valve body near the first connecting portion; the valve assembly is movably connected to the inner circumferential surface of the valve body near the second connecting portion.

[0009] In some embodiments, the support assembly includes a support shell, a third connecting portion, a water hammer pipe, and a baffle ring; one end of the support shell is fixedly connected to the third connecting portion; one end of the water hammer pipe is fixedly connected to the inner circumferential surface of the support shell near the third connecting portion; the outer circumferential surface of the baffle ring is fixedly connected to the inner circumferential surface of the water hammer pipe near the third connecting portion; the third connecting portion is detachably fixedly connected to the valve body; the support shell is detachably fixedly connected to the valve assembly; and the water hammer pipe is movably connected to the water hammer prevention assembly.

[0010] In some embodiments, the valve assembly includes a valve disc, a first connecting rod, a connecting pipe, a first spring, a baffle plate, a threaded tube, and a fourth connecting portion; one end of the first connecting rod is fixedly connected to the valve disc; the first connecting rod passes through the connecting pipe; the connecting rod is threadedly connected to the threaded tube; the baffle plate is fixedly connected to the outer circumferential surface of the connecting pipe; the first spring is sleeved on the first connecting rod, with one end abutting against the valve disc and the other end abutting against the baffle plate; one end of the threaded tube is fixedly connected to one end face of the fourth connecting portion; the other end face of the fourth connecting portion is fixedly connected to the waterproof hammer assembly; the outer circumferential surface of the fourth connecting portion is detachably fixedly connected to the inner circumferential surface of the support shell; the valve disc is movably connected to the inner circumferential surface of the valve body near the end of the second connecting portion.

[0011] In some embodiments, the water hammer assembly includes a damping tube, a damping fluid, a second spring, a second connecting rod, and a pressure plate; the damping tube is fixedly connected to the end of the fourth connecting portion away from the valve disc; the second spring is disposed inside the damping tube; one end of the second spring is fixedly connected to the fourth connecting portion; the damping fluid is disposed inside the damping tube; one end of the second connecting rod is fixedly connected to one end of the pressure plate, and the outer peripheral surface of the other end abuts against the inner peripheral surface of the damping tube; the outer peripheral surface of the pressure plate abuts against the inner peripheral surface of the water hammer tube.

[0012] To address the problem of reduced service life of pipelines under water hammer, this invention has the following advantages:

[0013] By installing a water hammer prevention assembly, when the axial flow check valve closes the pipeline, the water hammer prevention assembly can mitigate water hammer, thereby preventing the pipeline from being subjected to excessive impact and extending the service life of the pipeline. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an axial flow check valve.

[0015] Figure 2 for Figure 1 Partial diagram of the explosion;

[0016] Figure 3 This is a plan view of an axial flow check valve;

[0017] Figure 4 for Figure 3 Partial cross-sectional view along the AA direction.

[0018] In the diagram: 01, Valve body assembly; 11, Valve body; 12, First connecting part; 13, Second connecting part; 02, Support assembly; 21, Support shell; 22, Third connecting part; 23, Water hammer pipe; 24, Baffle ring; 03, Valve assembly; 31, Valve disc; 32, First connecting rod; 33, Connecting pipe; 34, First spring; 35, Baffle plate; 36, Helical tube; 37, Fourth connecting part; 04, Water hammer assembly; 41, Damping tube; 42, Second connecting rod; 43, Pressure plate. Detailed Implementation

[0019] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0020] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0021] This embodiment discloses an axial flow check valve, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, it may include:

[0022] Valve body assembly 01;

[0023] Support component 02, which is detachably and fixedly connected to valve body assembly 01;

[0024] Valve assembly 03 is detachably and fixedly connected to the support assembly 02; valve assembly 03 is movably connected to the valve body assembly 01.

[0025] Waterproof hammer assembly 04 is fixedly connected to the valve body assembly 01; waterproof hammer assembly 04 is movably connected to the support assembly 02.

[0026] In this embodiment, by setting up a water hammer prevention assembly 04, when the axial flow check valve closes the pipeline, the water hammer prevention assembly 04 can reduce water hammer, thereby preventing the pipeline from being subjected to excessive impact and thus extending the service life of the pipeline.

[0027] In some embodiments, such as Figure 2 , Figure 4 As shown, the valve body assembly 01 includes a valve body 11, a first connecting part 12, and a second connecting part 13; the valve body 11 has an internal hollow cavity structure with openings at both ends; the first connecting part 12 is fixedly connected to one open end of the valve body, and the second connecting part 13 is fixedly connected to the other open end of the valve body 11; the first connecting part 12 and the second connecting part 13 are located outside the hollow cavity of the valve body 11; the support assembly 02 is detachably fixedly connected to the inner circumferential surface of the valve body 11 near the first connecting part 12; the valve assembly 03 is movably connected to the inner circumferential surface of the valve body 11 near the second connecting part 13.

[0028] In this embodiment, the first connecting part 12 and the second connecting part 13 can be flanges, and the first connecting part 12 and the second connecting part 13 can be used to connect with a pipeline.

[0029] In some embodiments, such as Figure 2 , Figure 4 As shown, the support assembly 02 includes a support shell 21, a third connecting part 22, a water hammer pipe 23, and a baffle ring 24; one end of the support shell 21 is fixedly connected to the third connecting part 22; one end of the water hammer pipe 23 is fixedly connected to the inner circumferential surface of the support shell 21 near the third connecting part 22; the outer circumferential surface of the baffle ring 24 is fixedly connected to the inner circumferential surface of the water hammer pipe 23 near the third connecting part 22; the third connecting part 22 is detachably fixedly connected to the valve body 11; the support shell 21 is detachably fixedly connected to the valve assembly 03; and the water hammer pipe 23 is movably connected to the water hammer prevention assembly 04.

[0030] In this embodiment, the third connecting part 22 is detachably fixed to the valve body 11 by means of a threaded connection, and the support shell 21 is located inside the valve body 11.

[0031] In some embodiments, such as Figure 2 , Figure 4As shown, the valve assembly 03 includes a valve disc 31, a first connecting rod 32, a connecting pipe 33, a first spring 34, a baffle plate 35, a threaded tube 36, and a fourth connecting part 37. One end of the first connecting rod 32 is fixedly connected to the valve disc 31. The first connecting rod 32 passes through the connecting pipe 33. The connecting rod is threadedly connected to the threaded tube 36. The baffle plate 35 is fixedly connected to the outer circumferential surface of the connecting pipe 33. The first spring 34 is sleeved on the first connecting rod 32, with one end abutting against the valve disc 31 and the other end abutting against the baffle plate 35. One end of the threaded tube 36 is fixedly connected to one end face of the fourth connecting part 37. The other end face of the fourth connecting part 37 is fixedly connected to the waterproof hammer assembly 04. The outer circumferential surface of the fourth connecting part 37 is detachably fixedly connected to the inner circumferential surface of the support shell 21. The valve disc 31 is movably connected to the inner circumferential surface of the valve body 11 near the end of the second connecting part 13.

[0032] In this embodiment, when the high-speed fluid in the pipeline impacts the valve disc 31 and squeezes the first spring 34, the valve disc 31 disengages from the valve body 11 and abuts against one end of the support shell 21. The fluid flows in the space between the valve body 11 and the support shell 21. When the fluid velocity decreases, the first spring 34 applies a spring force to the valve disc 31, causing the valve disc 31 to abut against the valve body 11, thereby cutting off the fluid flow in the pipeline.

[0033] In some embodiments, such as Figure 2 , Figure 4 As shown, the water hammer assembly 04 includes a damping tube 41, damping fluid (not shown in the figure), a second spring (not shown in the figure), a second connecting rod 42, and a pressure plate 43; the damping tube 41 is fixedly connected to the end of the fourth connecting part 37 away from the valve disc 31; the second spring is disposed inside the damping tube 41; one end of the second spring is fixedly connected to the fourth connecting part 37; the damping fluid is disposed inside the damping tube 41; one end of the second connecting rod 42 is fixedly connected to one end of the pressure plate 43, and the outer peripheral surface of the other end abuts against the inner peripheral surface of the damping tube 41; the outer peripheral surface of the pressure plate 43 abuts against the inner peripheral surface of the water hammer pipe 23.

[0034] In this embodiment, the damping fluid is a fluid with a certain viscosity known to those skilled in the art, which can be applied to the scenario in which this utility model is located and can slow down the extension and retraction speed of the second spring; and the amount of damping fluid can be selected as needed, so that the second spring can slowly release its elastic potential energy.

[0035] The detachable connection method mentioned above can be a threaded connection.

[0036] The working principle of this utility model is as follows:

[0037] When the fluid velocity in the pipeline decreases, under the action of the first spring 34, the valve disc 31 abuts against the valve body 11, thereby cutting off the fluid in the pipeline, which causes water hammer. When the fluid impacts the pressure plate 43, the second connecting rod 42 squeezes the second spring. The second spring and the damping fluid are compressed quickly. When the second spring releases its elastic potential energy, due to the action of the damping fluid, the elastic potential energy of the second spring is released slowly, thereby preventing water hammer from damaging the pipeline.

[0038] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the spirit and scope of this disclosure.

Claims

1. An axial flow check valve, characterized in that, include: Valve body assembly; A support assembly is detachably and fixedly connected to the valve body assembly; A valve assembly, wherein the valve assembly is detachably and fixedly connected to the support assembly; and the valve assembly is movably connected to the valve body assembly. A waterproof hammer assembly, which is fixedly connected to the valve body assembly; and a waterproof hammer assembly is movably connected to the support assembly. The valve body assembly includes a valve body, a first connecting portion, and a second connecting portion; the valve body has an internal hollow cavity structure with openings at both ends; the first connecting portion is fixedly connected to one open end of the valve body, and the second connecting portion is fixedly connected to the other open end of the valve body; the first connecting portion and the second connecting portion are located outside the hollow cavity of the valve body; the support assembly is detachably fixedly connected to the inner circumferential surface of the valve body near the first connecting portion; the valve assembly is movably connected to the inner circumferential surface of the valve body near the second connecting portion. The support assembly includes a support shell, a third connecting part, a water hammer pipe, and a baffle ring; one end of the support shell is fixedly connected to the third connecting part; one end of the water hammer pipe is fixedly connected to the inner circumferential surface of the support shell near the third connecting part; the outer circumferential surface of the baffle ring is fixedly connected to the inner circumferential surface of the water hammer pipe near the third connecting part; the third connecting part is detachably fixedly connected to the valve body; the support shell is detachably fixedly connected to the valve assembly; and the water hammer pipe is movably connected to the water hammer prevention assembly. The valve assembly includes a valve disc, a first connecting rod, a connecting pipe, a first spring, a baffle plate, a threaded tube, and a fourth connecting part; one end of the first connecting rod is fixedly connected to the valve disc; the first connecting rod passes through the connecting pipe; the connecting rod is threadedly connected to the threaded tube; the baffle plate is fixedly connected to the outer circumferential surface of the connecting pipe; the first spring is sleeved on the first connecting rod, with one end abutting against the valve disc and the other end abutting against the baffle plate; one end of the threaded tube is fixedly connected to one end face of the fourth connecting part; the other end face of the fourth connecting part is fixedly connected to the waterproof hammer assembly; the outer circumferential surface of the fourth connecting part is detachably fixedly connected to the inner circumferential surface of the support shell; the valve disc is movably connected to the inner circumferential surface of the valve body near the end of the second connecting part. The water hammer prevention assembly includes a damping tube, damping fluid, a second spring, a second connecting rod, and a pressure plate. The damping tube is fixedly connected to the end of the fourth connecting part away from the valve disc. The second spring is disposed inside the damping tube. One end of the second spring is fixedly connected to the fourth connecting part. The damping fluid is disposed inside the damping tube. One end of the second connecting rod is fixedly connected to one end of the pressure plate, and the outer circumferential surface of the other end abuts against the inner circumferential surface of the damping tube. The outer circumferential surface of the pressure plate abuts against the inner circumferential surface of the water hammer tube.

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