Check valve
By setting a limiting element in the check valve to restrict the maximum opening angle of the valve disc, the fatigue problem of the reset element caused by the reciprocating swing of the valve disc is solved, thereby extending the life of the reset element and ensuring stable system operation.
Patent Information
- Application Number
- CN202520163703.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-23
AI Technical Summary
Double-disc swing check valves are susceptible to fluid interference under low flow conditions, causing the valve disc to swing back and forth, which can lead to fatigue damage to the reset components.
By setting a limiting component to limit the maximum opening angle of the valve disc, the Karman vortex street phenomenon is avoided, ensuring that the valve disc is only subjected to the force of stable water flow. A combination structure of limiting component and reset component is adopted.
It extends the service life of the reset component, avoids fatigue damage caused by reciprocating oscillation, and does not affect the system's water resistance.
Smart Images
Figure CN223740103U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of check valve technology, and in particular to a check valve. Background Technology
[0002] Double-disc swing check valves are commonly installed at the outlet of the main pump in a DC valve cooling system. These valves typically close by using a reset element (such as a torsion spring) to prevent backflow of fluid from damaging the pump. However, under low flow conditions, the valve disc is susceptible to reciprocating oscillations when open due to fluid flow, leading to fatigue damage to the reset element. Utility Model Content
[0003] To solve at least one of the above-mentioned technical problems, this application provides a check valve, and the technical solution adopted is as follows.
[0004] This application provides a check valve, comprising: a valve body having a flow cavity; a first connector connected to the valve body; two valve discs respectively disposed on both sides of the first connector and rotatably connected to the first connector; a reset member disposed on the first connector, with both ends of the reset member connected to the two valve discs respectively, the reset member being used to drive the two valve discs to close the flow cavity; and a limiting member connected to the valve body, the limiting member being disposed in front of the first connector along the flow direction of the fluid passing through the flow cavity, the limiting member being used to abut against the valve discs to limit the maximum opening angle of the valve discs.
[0005] According to the check valve provided in this application, it has at least the following technical effects: In the embodiment of this application, by setting a limiting member to limit the maximum opening angle of the valve disc, the included angle between the two valve discs can be increased, thereby avoiding the high and low pressure areas caused by the gate jamming, so that the valve disc is only subjected to the force of a relatively stable water flow. Therefore, the valve disc will not swing back and forth when it opens, which will cause fatigue damage to the reset member, thus extending the service life of the reset member, and not affecting the water resistance of the system.
[0006] In some embodiments of this application, the check valve further includes a second connector disposed in the flow cavity, the second connector being connected to the valve body, and the limiting member being disposed on the second connector.
[0007] In some embodiments of this application, the limiting member includes a limiting block, which is sleeved outside the second connecting member.
[0008] In some embodiments of this application, the maximum opening angle of the valve disc is 55° to 80°.
[0009] In some embodiments of this application, the first connector includes a first connecting rod, the two ends of which are respectively connected to the valve body.
[0010] In some embodiments of this application, the reset member includes a torsion spring, the spring coil of which is sleeved outside the first connecting rod, and the ends of the torsion spring are respectively connected to the two valve discs.
[0011] In some embodiments of this application, two torsion springs are provided, and the two torsion springs are spaced apart along the length direction of the first connecting rod.
[0012] In some embodiments of this application, the check valve further includes a limiting sleeve, which is sleeved on the outside of the first connecting rod. The limiting sleeve is disposed between the two torsion springs, and the limiting sleeve is also disposed at the ends of the two torsion springs that are far apart from each other. The diameter of the limiting sleeve is larger than the outer diameter of the spring coil of the torsion spring.
[0013] In some embodiments of this application, the valve disc has a groove for the end of the torsion spring to be inserted.
[0014] In some embodiments of this application, the check valve further includes a lifting ring connected to the outside of the valve body. Attached Figure Description
[0015] The aspects and advantages described and / or added to the embodiments of this application will become apparent and readily understood in conjunction with the following drawings. It should be noted that the embodiments illustrated in the following drawings are exemplary and are used only to explain this application, and should not be construed as limiting this application.
[0016] Figure 1 This is a schematic diagram of the structure of the check valve provided in the embodiments of this application;
[0017] Figure 2 This is another structural schematic diagram of the check valve provided in the embodiments of this application;
[0018] Figure 3 Another schematic diagram of the check valve provided in the embodiments of this application;
[0019] Figure 4 for Figure 3 Enlarged view of section B.
[0020] Figure label:
[0021] Valve body 100; valve disc 200; groove 210; reset component 310; first connecting component 320; limit component 410; fastening screw 420; second connecting component 430; bolt 440; flat washer 450; sealing ring 460; limit sleeve 500; lifting ring 600. Detailed Implementation
[0022] The following is combined with Figures 1 to 4 The embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0023] In the description of this application, it should be understood that the use of terms such as "center," "middle," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings and is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0025] In this embodiment, the positive X-axis direction is considered right, the negative X-axis direction is considered left; the positive Y-axis direction is considered front, the negative Y-axis direction is considered back; the positive Z-axis direction is considered top, and the negative Z-axis direction is considered bottom.
[0026] Double-disc swing check valves are commonly installed at the outlet of the main pump in a DC valve cooling system. These valves typically close the valve disc 200 by resetting the valve disc 310 (e.g., a torsion spring) to prevent backflow of fluid from damaging the pump. Under low flow conditions, the valve disc 200 is susceptible to reciprocating oscillations due to fluid flow, which can damage the resetting element 310.
[0027] For example, the reset member 310 is a torsion spring. The valve disc 200 is affected by the fluid and swings back and forth, causing the torsion spring to move up and down along the axis of rotation, which in turn causes the spring coil of the torsion spring to wear. The connection between the end of the torsion spring and the spring coil is also prone to metal fatigue fracture after long-term swinging.
[0028] See Figure 1 This application provides a check valve. Optionally, the check valve can be a double-disc swing check valve.
[0029] For example, see Figure 1 and Figure 2 The check valve includes a valve body 100, a first connecting member 320, a reset member 310, a limiting member 410, and two valve discs 200. The valve body 100 has a flow chamber. The first connecting member 320 is connected to the valve body 100. The two valve discs 200 are respectively disposed on both sides of the first connecting member 320 and are rotatably connected to the first connecting member 320. The reset member 310 is disposed on the first connecting member 320, and its two ends are respectively connected to the two valve discs 200. The reset member 310 is used to drive the two valve discs 200 to close the flow chamber. The limiting member 410 is connected to the valve body 100 and is disposed in front of the first connecting member 320 along the flow direction of the fluid passing through the flow chamber. The limiting member 410 is used to abut against the valve discs 200 to limit the maximum opening angle α of the valve discs 200.
[0030] For example, the flow direction of the fluid through the flow chamber is from back to front (i.e., the fluid flows along...). Figure 1 (Flowing in the positive Y-axis direction), and the limiting member 410 is located directly in front of the first connecting member 320. It can be understood that when water flows from back to front into the flow chamber, the water flow impacts the two valve discs 200, causing them to rotate towards the limiting member 410 to open the flow chamber and allow fluid to pass through. At this time, the resetting member 310 generates an elastic force; when no water flows through the flow chamber, the elastic force of the resetting member 310 drives the two valve discs 200 to reset and close the flow chamber. It should be noted that, see [link to relevant documentation]... Figure 2 The maximum opening angle α of valve disc 200 is the maximum angle that valve disc 200 rotates under the impact of fluid.
[0031] It is understandable that the reciprocating oscillation of valve disc 200 is due to the reciprocating formation of high-pressure and low-pressure zones between the two valve discs 200 after opening, resulting in an imbalance of forces on valve disc 200 and thus reciprocating oscillation, i.e., the Karman vortex street phenomenon. In this embodiment, by setting a limiting member 410 to limit the maximum opening angle α of valve disc 200, the included angle between the two valve discs 200 can be increased, thereby avoiding the high and low pressure zones generated by the Karman vortex street. This allows valve disc 200 to be subjected only to the force of a relatively stable water flow, so that valve disc 200 will not reciprocate when opening, thus preventing fatigue damage to the reset member 310, extending the service life of the reset member 310, and not affecting the water resistance of the system.
[0032] Optionally, in some embodiments, the check valve further includes a second connector 430, which is disposed in the flow chamber and connected to the valve body 100. A limiting member 410 is disposed on the second connector 430.
[0033] Optionally, in some embodiments, the limiting member 410 includes a limiting block, which is sleeved outside the second connector 430.
[0034] For example, the second connecting member 430 includes a second connecting rod, the upper and lower ends of which are respectively connected to the valve body 100. Two limiting blocks are provided, each sleeved on the upper and lower ends of the second connecting rod. Optionally, the limiting blocks are fixed to the second connecting rod by fastening screws 420.
[0035] Optionally, both ends of the second connecting rod are connected to the valve body 100 by bolts 440. Exemplarily, the second connecting rod is vertically positioned, and two bolts 440 are respectively located at the upper and lower ends of the valve body 100, passing through the valve body 100 to connect to the upper and lower ends of the second connecting rod, respectively. See [link to previous section] Figure 3 and Figure 4 A flat washer 450 and a sealing ring 460 are provided between the bolt 440 and the valve body 100. Optionally, both the sealing ring 460 and the flat washer 450 are fitted over the bolt 440, with the sealing ring 460 located on the inside and the flat washer 450 located on the outside.
[0036] Optionally, in some embodiments, the maximum opening angle α of the valve disc 200 is 55° to 80°.
[0037] It is understandable that the maximum opening angle α of the valve disc 200 can be adjusted by adjusting the size of the limit block, so as to achieve the optimal flow resistance under different working conditions, prevent the valve disc 200 from swinging back and forth during continuous operation of the system, and prevent damage to the reset component 310, thereby extending the service life of the reset component 310.
[0038] Optionally, in some embodiments, the first connector 320 includes a first connecting rod, the two ends of which are respectively connected to the valve body 100.
[0039] For example, the first connecting rod is parallel to the second connecting rod, and the installation method of the first connecting rod is the same as that of the second connecting rod, which will not be elaborated here.
[0040] Alternatively, in some embodiments, see Figure 1 The reset component 310 includes a torsion spring, the spring coil of which is sleeved outside the first connecting rod, and the ends of the torsion spring are respectively connected to the two valve discs 200.
[0041] Optionally, in some embodiments, two torsion springs are provided, spaced apart along the length of the first connecting rod. It is understood that the specific number of torsion springs can be set according to actual needs and is not specifically limited here.
[0042] For example, the two valve discs 200 are divided into a left valve disc and a right valve disc, the left valve disc and the right valve disc are the same size, and the two torsion springs are divided into an upper torsion spring and a lower torsion spring. The right end of the upper torsion spring is connected to the right valve disc, the left end of the upper torsion spring is connected to the left valve disc, the left end of the lower torsion spring is connected to the left valve disc, and the right end of the lower torsion spring is connected to the right valve disc.
[0043] Alternatively, in some embodiments, see Figure 1 The valve disc 200 has a groove 210 for the end of the torsion spring to be inserted. It can be understood that by providing the groove 210, the end of the torsion spring can be limited to prevent the end of the torsion spring from shifting.
[0044] Alternatively, in some embodiments, see Figure 1 or Figure 3 The check valve also includes a limiting sleeve 500, which is sleeved around the first connecting rod. A limiting sleeve 500 is also provided between the two torsion springs, and at the ends of the two torsion springs that are furthest from each other. The diameter of the limiting sleeve 500 is larger than the outer diameter of the torsion spring coils. Optionally, the limiting sleeve 500 can be made of a relatively soft material such as rubber.
[0045] Understandably, the limiting sleeve 500 between the two torsion springs can prevent collision and friction between them, thereby preventing damage to the torsion springs; the limiting sleeve 500 is also provided at the ends of the two torsion springs that are far apart from each other, which can limit the two torsion springs; the diameter of the limiting sleeve 500 is larger than the outer diameter of the spring coil of the torsion spring, which can prevent the valve disc 200 from colliding and rubbing against the torsion spring during rotation, thereby preventing damage to the torsion spring.
[0046] Optionally, in some embodiments, the check valve further includes a lifting ring 600 connected to the outside of the valve body 100. Optionally, the lifting ring 600 is connected to the upper side of the valve body 100.
[0047] Other configurations and operations of the check valve according to the embodiments of this application are known to those skilled in the art and will not be described in detail here.
[0048] In the description of this specification, the use of terms such as "an embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in the embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0049] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.
[0050] In the description of this application, the presence of a comma ("、") in the patent title indicates an "and" relationship, not an "or" relationship. For example, if the patent title is "A type A, B type", it means that the content claimed in this application is: a technical solution with the subject matter title A and a technical solution with the subject matter title B.
Claims
1. A check valve characterized by, The utility model relates to a check valve, comprising: a valve body having a flow cavity; a first connecting member connected to the valve body; two valve flaps disposed on two sides of the first connecting member and rotatably connected to the first connecting member; a reset member disposed on the first connecting member, two ends of the reset member being connected to the two valve flaps, the reset member being used to drive the two valve flaps to close the flow cavity; a limiting member connected to the valve body, the limiting member being disposed in front of the first connecting member along the flow direction of fluid flowing through the flow cavity, the limiting member being used to abut against the valve flaps to limit the maximum opening angle of the valve flaps.
2. The check valve of claim 1, wherein: The check valve further comprises a second connecting member disposed in the flow cavity, the second connecting member being connected to the valve body, and the limiting member being disposed on the second connecting member.
3. The check valve of claim 2, wherein: The limiting member comprises a limiting block sleeved on the second connecting member.
4. The check valve of any one of claims 1 to 3, wherein: The maximum opening angle of the valve flaps is 55°-80°.
5. The check valve of claim 1, wherein: The first connecting member comprises a first connecting rod, two ends of the first connecting rod being connected to the valve body.
6. The check valve of claim 5, wherein: The reset member comprises a torsion spring, a spring coil of the torsion spring being sleeved on the first connecting rod, and two ends of the torsion spring being connected to the two valve flaps.
7. The check valve of claim 6, wherein: The check valve further comprises a limiting sleeve sleeved on the first connecting rod, the limiting sleeve being disposed between the two torsion springs and at the ends of the two torsion springs away from each other, and a diameter of the limiting sleeve being greater than an outer diameter of the spring coil of the torsion spring.
8. The check valve of claim 7, wherein: The valve flaps are provided with grooves for embedding the ends of the torsion springs.
9. The check valve of claim 6, wherein: The check valve further comprises a lifting ring connected to the outer side of the valve body.
10. The check valve of claim 1, wherein: