Axial flow check valve

Abstract

The present invention relates to the field of check valves, and specifically discloses an axial flow check valve, including a valve housing and a valve core assembly installed at the axis of the valve housing, the end of the valve core assembly is abutted against the inner edge of one end of the valve housing, a guide is provided inside the valve core assembly, and a linkage assembly is provided on the inner wall of the valve housing near the abutment end of the valve housing and the valve core assembly, and the end of the linkage assembly is movably connected to the guide. The present invention drives the guide to deform through the process of the valve core moving back and forth along the axis, and in the process of forward entry, the guide forms a vortex structure to accelerate the discharge of fluid, and in the process of backflow, an outer barrier is formed to form a slow flow, and the middle part is guided out by the guide to guide the high-speed flow, and a fluid wall to prevent water hammer is formed through the slow flow, which effectively avoids the occurrence of water hammer phenomenon and effectively protects the valve housing and the valve core assembly.

Description

Technical Field

[0001] The present invention relates to the field of check valves, and more particularly to an axial flow check valve. Background Art

[0002] A check valve is a valve with a circular disc as the opening and closing part. It blocks the backflow of the medium by its own weight and the pressure of the medium. It is an automatic valve, also known as a non-return valve, one-way valve, reflux valve or isolation valve. When the inlet pressure is greater than the sum of the weight of the disc and its flow resistance, the valve is opened. Conversely, when the medium flows back, the valve is closed.

[0003] In the process of checking the return flow of the existing axial flow check valve, the valve core part is in a dynamic opening and closing process. When the valve core enters the fluid, if it is not discharged from the valve body in time, the reflux liquid will continuously collide with the fluid in the valve body, and reflux when the valve core is not blocked in time, resulting in loose sealing;

[0004] At the same time, during the backflow process, due to the high fluid flow rate, water hammer will form on the wall, causing the valve body and valve core to be under greater pressure, which can easily affect the sealing of the valve body. Summary of the invention

[0005] The present invention provides an axial flow check valve, which solves the technical problem in the related art that the fluid in the valve body cannot be discharged in time and the water hammer phenomenon is easily generated when the fluid flows back.

[0006] According to one aspect of the present invention, an axial flow check valve is provided, comprising a valve housing and a valve core assembly installed at the axis of the valve housing, the end of the valve core assembly is abutted against the inner edge of one end of the valve housing, a guide is provided inside the valve core assembly, a linkage assembly is provided on the inner wall of the valve housing near the abutting end of the valve housing and the valve core assembly, and the end of the linkage assembly is movably connected to the guide;

[0007] When the valve core assembly moves along the axial direction of the valve housing, the linkage assembly drives the guide member to deform, and the guide member can accelerate or decelerate the fluid entering the valve housing.

[0008] Furthermore: the valve core assembly includes a valve seat, a support member and a sealing plug, the sealing plug is located at the end of the support member, and the other end of the support member is installed on the inner wall of the valve seat, and the outer edge of the bottom end of the valve seat is fixedly connected to the inner edge of one end of the valve housing.

[0009] Furthermore: the support member includes an inner partition, a through rod and a support spring, the end of the through rod is fixedly connected to the valve seat, and the axial direction of the through rod is consistent with the axial direction of the valve housing, the support spring is sleeved on the outer wall of the through rod, and the support spring is arranged between the sealing plug and the inner partition, and the support spring is used to provide a supporting force for the sealing plug to move axially along the valve housing.

[0010] Further: the linkage assembly includes a tensioning spring, a push rod and a connecting rod, the push rod is movably connected to the inner wall of the valve housing, the end of the push rod is abutted against the inner wall of the sealing plug, the connecting rod is movably connected to the inner wall of the push rod, and the end of the connecting rod is movably connected to the end of the guide member, the tensioning spring is installed between the outer wall of the push rod and the inner wall of the valve housing, and the tensioning spring is used to provide downward pressure on the push rod around the connection with the valve housing.

[0011] Furthermore: the guide member includes a plurality of adjustment plates, the vertical cross-section of the adjustment plates is a trapezoidal structure, and when the sealing plug is pressed against the inner edge of the valve housing, the plurality of adjustment plates form a truncated cone-shaped guiding state.

[0012] Furthermore: a through hole is provided on the inner wall of the bottom end of the valve seat, and one end of the adjusting plate passes through the through hole, a through hole is opened on the side wall of the valve seat, an end of the connecting rod passes through the through hole, and is movably connected with the outer surface of the adjusting plate in the through hole, and when the push rod is sealed and squeezed and rotated, the connecting rod drives the adjusting plate to tilt around the connection with the connecting rod, so that the multiple adjusting plates form a vortex-shaped guiding state.

[0013] Furthermore: both ends of the valve housing are provided with valve end flanges, the outer sides of the valve end flanges are provided with mounting holes, and the outer walls of the valve end flanges are paved with mounting gaskets.

[0014] Furthermore: the valve end flange includes a liquid inlet flange and a liquid outlet flange, the liquid inlet flange is arranged on the outer wall of the valve shell near one end of the sealing plug, and the liquid outlet flange is arranged on the outer wall of the other end of the valve shell.

[0015] Furthermore: a circle of filter plates is provided on the inner side of the liquid outlet flange.

[0016] Furthermore, a sealing ring is clamped on the inner edge of the connection between the liquid inlet flange and the valve housing, and the outer edge of the end of the sealing plug is abutted against the inner edge of the sealing ring.

[0017] The beneficial effects of the present invention are:

[0018] The check valve drives the guide member to deform through the process of the valve core moving back and forth along the axis. During the forward entry process, the guide member forms a vortex structure to accelerate the discharge of the fluid. During the backflow process, an outer barrier is formed to form a slow flow, and the middle part is used to guide the high-speed flow. The slow flow forms a fluid wall to prevent water hammer, effectively avoiding the occurrence of water hammer and effectively protecting the valve housing and valve core components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of an axial flow check valve proposed by the present invention;

[0020] Figure 2 It is a half-section structural schematic diagram of an axial flow check valve proposed by the present invention;

[0021] Figure 3 yes Figure 2 The main view of

[0022] Figure 4 yes Figure 1 Schematic diagram of the reverse inflow structure;

[0023] Figure 5 yes Figure 1 Schematic diagram of the forward inflow structure.

[0024] In the figure: 100, valve housing; 200, valve end flange; 210, liquid inlet flange; 220, liquid outlet flange; 300, filter plate; 400, valve core assembly; 410, valve seat; 420, inner partition; 430, through rod; 440, support spring; 500, adjusting plate; 600, sealing plug; 700, sealing ring; 800, linkage assembly; 810, tension spring; 820, push rod; 830, connecting rod. DETAILED DESCRIPTION

[0025] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and is not a limitation of the scope of protection, applicability or examples set forth in the claims. The functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Various examples may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0026] Embodiment 1

[0027] See also Figure 1-Figure 5 As shown, an axial flow check valve comprises a valve housing 100 and a valve core assembly 400 installed at the axis of the valve housing 100, the end of the valve core assembly 400 is abutted against the inner edge of one end of the valve housing 100, a guide is provided inside the valve core assembly 400, a linkage assembly 800 is provided on the inner wall of the valve housing 100 near the abutment end of the valve housing 100 and the valve core assembly 400, and the end of the linkage assembly 800 is movably connected to the guide;

[0028] When the valve core assembly 400 moves along the axial direction of the valve housing 100 , the linkage assembly 800 drives the guide member to deform, and the guide member can accelerate or decelerate the fluid passing into the valve housing 100 .

[0029] The valve core assembly 400 includes a valve seat 410, a support member and a sealing plug 600. The sealing plug 600 is located at the end of the support member, and the other end of the support member is installed on the inner wall of the valve seat 410. The outer edge of the bottom end of the valve seat 410 is fixedly connected to the inner edge of one end of the valve housing 100.

[0030] The support member includes an inner partition 420, a through rod 430 and a support spring 440. The end of the through rod 430 is fixedly connected to the valve seat 410, and the axial direction of the through rod 430 is consistent with the axial direction of the valve housing 100. The support spring 440 is sleeved on the outer wall of the through rod 430. The support spring 440 is arranged between the sealing plug 600 and the inner partition 420. The support spring 440 is used to provide a supporting force for the sealing plug 600 to move axially along the valve housing 100.

[0031] The linkage assembly 800 includes a tensioning spring 810, a push rod 820 and a connecting rod 830. The push rod 820 is movably connected to the inner wall of the valve housing 100, and the end of the push rod 820 is abutted against the inner wall of the sealing plug 600. The connecting rod 830 is movably connected to the inner wall of the push rod 820, and the end of the connecting rod is movably connected to the end of the guide member. The tensioning spring 810 is installed between the outer wall of the push rod 820 and the inner wall of the valve housing 100. The tensioning spring 810 is used to provide downward pressure on the push rod 820 around the connection with the valve housing 100.

[0032] The guide member includes a plurality of adjustment plates 500 , and the vertical section of the adjustment plates 500 is a trapezoidal structure. When the sealing plug 600 is pressed against the inner edge of the valve housing 100 , the plurality of adjustment plates 500 form a truncated cone-shaped guiding state.

[0033] A through hole is provided on the inner wall at the bottom end of the valve seat 410, and one end of the adjusting plate 500 passes through the through hole. A through hole is opened on the side wall of the valve seat 410, and the end of the connecting rod 830 passes through the through hole and is movably connected with the outer surface of the adjusting plate 500 in the through hole. When the top rod 820 is squeezed and rotated by the sealing plug 600, the connecting rod 830 drives the adjusting plate 500 to tilt around the connection with the connecting rod 830, so that the multiple adjusting plates 500 form a vortex-shaped guiding state.

[0034] Both ends of the valve housing 100 are provided with valve end flanges 200 , and the outer sides of the valve end flanges 200 are provided with mounting holes, and the outer walls of the valve end flanges 200 are paved with mounting gaskets.

[0035] The valve end flange 200 includes a liquid inlet flange 210 and a liquid outlet flange 220 . The liquid inlet flange 210 is arranged on the outer wall of the valve housing 100 near one end of the sealing plug 600 , and the liquid outlet flange 220 is arranged on the outer wall of the other end of the valve housing 100 .

[0036] A circle of filter plates 300 is disposed on the inner side of the liquid outlet flange 220 .

[0037] A sealing ring 700 is clamped on the inner edge of the connection between the liquid inlet flange 210 and the valve housing 100 , and the outer edge of the end of the sealing plug 600 is abutted against the inner edge of the sealing ring 700 .

[0038] The valve body is connected to the pipeline through the valve end flanges 200 at both ends. When the liquid is input through one end of the liquid inlet flange 210, the fluid squeezes the end face of the sealing plug 600. The vertical section of the sealing plug 600 is a pentagonal structure, and the end of the sealing plug 600 close to the penetrating rod 430 is a plane. The sealing plug 600 is squeezed and moves along the penetrating rod 430, squeezing the support spring 440. The end of the penetrating rod 430 moves along the slot reserved inside the sealing plug 600, so that the connection surface of the sealing plug 600 and the sealing ring 700 is separated, and then the fluid flows out through the gap between the sealing plug 600 and the sealing ring 700, and flows out of one end of the liquid outlet flange 220 through the valve seat 410 and the valve housing 100.

[0039] During the process of the sealing plug 600 squeezing the penetration rod 430, the sealing plug 600 drives the push rod 820 to press downward, that is, the push rod 820 rotates around the connection between it and the valve housing 100, driving the connecting rod 830 to press downward, so that one end of the adjustment plate 500 is pressed downward, and the angle between the adjustment plate 500 and the through hole changes. The multiple adjustment plates 500 form a vortex structure, and the liquid flowing to one end of the liquid outlet flange 220 forms a vortex when passing through the gap between the adjustment plates 500, which accelerates the fluid to flow out of the valve housing 100.

[0040] If the fluid flows back into the valve housing 100 through one end of the liquid outlet flange 220, the sealing plug 600 will be squeezed to the inner edge of the sealing ring 700 under the dual action of the supporting spring 440 and the tensioning spring 810. The regulating plate 500 is in a truncated cone shape at this time and flows into the valve housing 100. The fluid is divided into two streams. The part entering the filter plate 300 is decelerated to form a slow-speed fluid and enters along the inner wall of the valve housing 100, and the other part is squeezed into the regulating plate 500. The regulating plate 500 guides the fluid to the outer surface of the valve seat 410 to form a high-speed fluid. The slow-speed fluid wraps the high-speed fluid on the inside, reducing the high-speed fluid from entering the valve housing 100 and forming an instantaneous squeeze on the inner wall of the valve housing 100, that is, reducing the water hammer phenomenon.

[0041] Then the fluid converges into a medium-speed fluid at the end of the valve housing 100, passes through the surface of the valve seat 410, and forms a negative pressure at the end of the valve housing 100, pressurizing the sealing plug 600, i.e., the Venturi effect, to ensure the sealing performance of the sealing plug 600;

[0042] At the same time, the push rod 820 can be tightened under the action of the tension spring 810, thereby ensuring the contact sealing at the connection between the sealing plug 600 and the sealing ring 700.

[0043] The embodiment of the present embodiment is described above in conjunction with the accompanying drawings, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present embodiment, ordinary technicians in this field can also make many forms without departing from the purpose of the present embodiment and the scope of protection of the claims, all of which are within the protection of the present embodiment.

Claims

1. An axial flow check valve, comprising a valve housing (100) and a valve core assembly (400) mounted at the axis of the valve housing (100), wherein an end of the valve core assembly (400) is abutted against an inner edge of one end of the valve housing (100), characterized in that: A guide is provided inside the valve core assembly (400); a linkage assembly (800) is provided on the inner wall of the valve housing (100) close to the abutment end of the valve housing (100) and the valve core assembly (400); and a terminal end of the linkage assembly (800) is movably connected to the guide; The linkage assembly (800) comprises a tension spring (810), a push rod (820) and a connecting rod (830), wherein the push rod (820) is movably connected to the inner wall of the valve housing (100), the end of the push rod (820) is abutted against the inner wall of the sealing plug (600), the connecting rod (830) is movably connected to the inner wall of the push rod (820), and the end of the connecting rod (830) is movably connected to the inner wall of the push rod (820), and the end of the connecting rod (830) is movably connected to the end of the guide member, the tension spring (810) is installed between the outer wall of the push rod (820) and the inner wall of the valve housing (100), and the tension spring (810) is used to provide downward pressure on the push rod (820) around the connection with the valve housing (100); When the valve core assembly (400) moves along the axial direction of the valve housing (100), the linkage assembly (800) drives the guide member to deform, and the guide member can accelerate or decelerate the fluid entering the valve housing (100); The guide member comprises a plurality of adjustment plates (500), the vertical cross-section of the adjustment plates (500) being a trapezoidal structure, and when the sealing plug (600) is pressed onto the inner edge of the valve housing (100), the plurality of adjustment plates (500) form a truncated cone-shaped guiding state.

2. An axial flow check valve according to claim 1, characterized in that: The valve core assembly (400) comprises a valve seat (410), a support member and a sealing plug (600), wherein the sealing plug (600) is located at the end of the support member, and the other end of the support member is mounted on the inner wall of the valve seat (410), and the outer edge of the bottom end of the valve seat (410) is fixedly connected to the inner edge of one end of the valve housing (100).

3. An axial flow check valve according to claim 2, characterized in that: The support member comprises an inner partition (420), a penetrating rod (430) and a support spring (440); the end of the penetrating rod (430) is fixedly connected to the valve seat (410), and the axial direction of the penetrating rod (430) is consistent with the axial direction of the valve housing (100); the support spring (440) is sleeved on the outer wall of the penetrating rod (430); the support spring (440) is arranged between the sealing plug (600) and the inner partition (420); the support spring (440) is used to provide a support force for the sealing plug (600) to move axially along the valve housing (100).

4. An axial flow check valve according to claim 3, characterized in that: The inner wall at the bottom end of the valve seat (410) is provided with a through hole, and one end of the adjustment plate (500) passes through the through hole. The side wall of the valve seat (410) is provided with a through hole, and the end of the connecting rod (830) passes through the through hole and is movably connected to the outer surface of the adjustment plate (500) in the through hole. When the push rod (820) is squeezed and rotated by the sealing plug (600), the connecting rod (830) drives the adjustment plate (500) to tilt around the connection with the connecting rod (830), so that the multiple adjustment plates (500) form a vortex-shaped guiding state.

5. An axial flow check valve according to claim 4, characterized in that: Both ends of the valve housing (100) are provided with valve end flanges (200), the outer edges of the valve end flanges (200) are provided with mounting holes, and the outer walls of the valve end flanges (200) are provided with mounting gaskets.

6. An axial flow check valve according to claim 5, characterized in that: The valve end flange (200) comprises a liquid inlet flange (210) and a liquid outlet flange (220); the liquid inlet flange (210) is arranged on the outer wall of the valve housing (100) at one end close to the sealing plug (600), and the liquid outlet flange (220) is arranged on the outer wall of the other end of the valve housing (100).

7. An axial flow check valve according to claim 6, characterized in that: A circle of filter plates (300) is provided on the inner side of the liquid outlet flange (220).

8. An axial flow check valve according to claim 7, characterized in that: A sealing ring (700) is clamped on the inner edge of the connection between the liquid inlet flange (210) and the valve housing (100), and the outer edge of the end of the sealing plug (600) is abutted against the inner edge of the sealing ring (700).

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