Check valve device with slow closing function

Abstract

The utility model relates to the technical field of valves, in particular to a check valve device with a slow closing function, which comprises a valve body, an end cover is fixedly mounted above the valve body, a partition plate is arranged in the valve body, and a through hole is formed in the partition plate; a valve rod is fixedly connected to the lower portion of the end cover, a movable sleeve is slidably connected to the outer side of the valve rod, a valve clack is fixedly connected to the lower portion of the movable sleeve, a spring is arranged in the movable sleeve and located between the valve rod and the valve clack, and the valve clack can be inserted into the through hole. By designing the deep through holes and the valve clacks, when the valve clacks are impacted by water flow, one side of the lower valve clack firstly falls down, half of the through holes are closed, the other half of the through holes are closed after the lower valve clack falls down for a certain distance, and the water flow cannot be suddenly stopped through segmented closing, so that a water hammer is avoided. And by designing a connecting plate and elastic plates, when the movable sleeve descends and is closed, the falling speed of the movable sleeve can be slowed down through the multiple elastic plates, and the slow closing capacity is further improved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a check valve device with a slow-closing function. Background Technology

[0002] Check valves are often installed at the outlet of water pumps in water supply and drainage pipelines to prevent water from flowing back when the pump stops. However, in some current water supply and drainage pipelines, traditional check valves typically only have a one-way tilting valve plate or two fan-shaped butterfly-shaped valve plates inside the valve body. When the pump stops, the valve closes quickly because the valve plates lose the driving force of the medium.

[0003] Currently, the backflow of the medium at the outlet of a check valve generates a huge "water hammer" force, which has a significant impact on the valve plate. Water hammer is a pressure shock wave generated when fluid flow suddenly stops or changes direction. It can lead to pipeline rupture, equipment damage, and increased noise, and sometimes even damage to valves and pipeline systems. This is particularly serious in large-diameter, high-head water supply and drainage pipelines. Therefore, it is necessary to design a check valve with a slow-closing function. Thus, those skilled in the art have provided a check valve device with a slow-closing function to solve the problems mentioned in the background art. Utility Model Content

[0004] To solve the above technical problems, this utility model provides a check valve device with a slow-closing function, including a valve body, an end cap fixedly installed on the top of the valve body, a partition plate inside the valve body, and a through hole inside the partition plate.

[0005] A valve stem is fixedly connected to the bottom of the end cap, a movable sleeve is slidably connected to the outside of the valve stem, a valve disc is fixedly connected to the bottom of the movable sleeve, and a spring is provided inside the movable sleeve between the valve stem and the valve disc, and the valve disc can be inserted into the through hole.

[0006] The valve disc includes an upper valve plate, which is fixedly connected to the lower end of the movable sleeve. An opening is provided on one side of the upper valve plate, and a vertical partition is fixedly connected below the upper valve plate. A lower valve plate is fixedly connected to one side of the vertical partition below the opening. When the valve disc is fully inserted into the through hole, the through hole is closed.

[0007] Preferably, the valve body has an inlet on one side and an outlet on the other side. The inlet communicates with the lower side of the through hole, and the outlet communicates with the upper side of the through hole.

[0008] Preferably, multiple elastic plates are symmetrically fixedly connected to the upper two sides inside the valve body, and multiple connecting plates are fixedly connected to the upper periphery of the movable sleeve. The connecting plates can contact the elastic plates, and the elastic plates are made of elastic material.

[0009] Preferably, a limiting groove is formed between the elastic plates, and limiting plates are fixedly connected to both sides of the upper end of the movable sleeve, with one end of the limiting plate inserted into the limiting groove.

[0010] Preferably, the vertical partition is connected to the upper valve plate and the lower valve plate by reinforcing ribs.

[0011] Preferably, a sealing gasket is provided between the end cap and the valve body.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] 1. This utility model is designed with a deep through hole and a valve disc. When the valve disc is impacted by water flow, one side of the lower valve disc falls first, closing half of the through hole. After falling a certain distance, the other half of the through hole is closed. By closing in stages, the water flow will not stop suddenly, thus avoiding water hammer.

[0014] 2. This utility model is designed with connecting plates and elastic plates. When the moving sleeve is lowered and closed, the multiple elastic plates can slow down the falling speed of the moving sleeve, thereby further improving the slow closing capability. Attached Figure Description

[0015] Figure 1 This is a structural diagram provided in this application;

[0016] Figure 2 This is a schematic diagram of the internal structure of the valve body provided in this application;

[0017] Figure 3 This is a schematic diagram of the structure of the valve disc located inside the through hole provided in this application;

[0018] Figure 4 This is a schematic diagram of the valve disc structure provided in this application;

[0019] Figure 5 This is a schematic diagram of the structure of the elastic plate provided in this application;

[0020] In the picture:

[0021] 1. Valve body; 2. End cap; 3. Baffle plate; 4. Through hole; 5. Inlet; 6. Outlet;

[0022] 7. Valve disc; 71. Upper valve plate; 72. Vertical partition plate; 73. Lower valve plate;

[0023] 8. Valve stem; 9. Moving sleeve; 91. Limiting plate; 92. Connecting plate; 10. Spring; 11. Elastic plate; 12. Limiting groove. Detailed Implementation

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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 utility model.

[0025] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Please see Figures 1-5 In this embodiment, a check valve device with a slow-closing function is provided, including a valve body 1, an end cap 2 fixedly installed on the top of the valve body 1, a partition 3 inside the valve body 1, and a through hole 4 inside the partition 3.

[0028] A valve stem 8 is fixedly connected to the bottom of the end cap 2. A movable sleeve 9 is slidably connected to the outside of the valve stem 8. A valve disc 7 is fixedly connected to the bottom of the movable sleeve 9. A spring 10 is provided inside the movable sleeve 9 between the valve stem 8 and the valve disc 7. The valve disc 7 can be inserted into the through hole 4.

[0029] The valve disc 7 includes an upper valve plate 71, which is fixedly connected to the lower end of the movable sleeve 9. An opening is provided on one side of the upper valve plate 71, and a vertical partition 72 is fixedly connected below the upper valve plate 71. A lower valve plate 73 is fixedly connected to one side of the vertical partition 72 below the opening. When the valve disc 7 is fully inserted into the through hole 4, it closes the through hole 4.

[0030] When the valve disc 7 falls, the lower valve plate 73 and the vertical partition 72 first enter the through hole 4, partially closing the through hole 4. With the through hole 4 partially closed, the water can flow through the other side of the vertical partition 72. The through hole 4 is only closed when the valve disc 7 is fully inserted into the through hole 4, thus avoiding the sudden closure of the through hole 4 and causing the harmful "water hammer" phenomenon.

[0031] In this embodiment, specifically, a water inlet 5 is provided on one side of the valve body 1, and a water outlet 6 is provided on the other side of the valve body 1. The water inlet 5 is connected to the lower side of the through hole 4, and the water outlet 6 is connected to the upper side of the through hole 4.

[0032] In this embodiment, specifically, multiple elastic plates 11 are symmetrically fixedly connected to both sides of the upper part of the valve body 1, and multiple connecting plates 92 are fixedly connected to the upper periphery of the movable sleeve 9. The connecting plates 92 can contact the elastic plates 11, and the elastic plates 11 are made of elastic material. When the connecting plates 92 descend, they cause the elastic plates 11 to bend. Through the elastic stress of the elastic plates 11, the descending speed of the connecting plates 92 is reduced, thereby slowing down the speed at which the valve disc 7 closes the through hole 4.

[0033] In this embodiment, specifically, a limiting groove 12 is formed between the elastic plates 11, and limiting plates 91 are fixedly connected to both sides of the upper end of the movable sleeve 9, with one end of the limiting plate 91 inserted into the limiting groove 12. This ensures that the sleeve 9 will not rotate, thereby preventing the elastic plates 11 from contacting the connecting plate 92.

[0034] In this embodiment, specifically, reinforcing ribs connect the vertical partition 72 to the upper valve plate 71 and the lower valve plate 73, increasing the overall strength of the valve disc 7.

[0035] In this embodiment, a sealing gasket is provided between the end cap 2 and the valve body 1 to enhance the sealing performance between the end cap 2 and the valve body 1.

[0036] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A check valve device with a slow-closing function, comprising a valve body (1), characterized in that, An end cap (2) is fixedly installed on the top of the valve body (1), and a partition (3) is provided inside the valve body (1), with a through hole (4) inside the partition (3); A valve stem (8) is fixedly connected below the end cap (2), a movable sleeve (9) is slidably connected to the outside of the valve stem (8), a valve disc (7) is fixedly connected below the movable sleeve (9), and a spring (10) is provided inside the movable sleeve (9) between the valve stem (8) and the valve disc (7), and the valve disc (7) can be inserted into the through hole (4). The valve disc (7) includes an upper valve plate (71), which is fixedly connected to the lower end of the movable sleeve (9). An opening is provided on one side of the upper valve plate (71), and a vertical partition plate (72) is fixedly connected below the upper valve plate (71). A lower valve plate (73) is fixedly connected on one side of the vertical partition plate (72) below the opening. When the valve disc (7) is fully inserted into the through hole (4), the through hole (4) is closed.

2. The check valve device with slow-closing function according to claim 1, characterized in that, The valve body (1) has an inlet (5) on one side and an outlet (6) on the other side. The inlet (5) is connected to the lower side of the through hole (4), and the outlet (6) is connected to the upper side of the through hole (4).

3. A check valve device with a slow-closing function according to claim 1, characterized in that, Multiple elastic plates (11) are symmetrically fixedly connected to the upper two sides inside the valve body (1), and multiple connecting plates (92) are fixedly connected to the upper periphery of the movable sleeve (9). The connecting plates (92) can contact the elastic plates (11), and the elastic plates (11) are made of elastic material.

4. A check valve device with a slow-closing function according to claim 3, characterized in that, Limiting grooves (12) are provided between the elastic plates (11), and limiting plates (91) are fixedly connected to both sides of the upper end of the movable sleeve (9). One end of the limiting plate (91) is inserted into the limiting groove (12).

5. A check valve device with a slow-closing function according to claim 1, characterized in that, The vertical partition (72) is connected to the upper valve plate (71) and the lower valve plate (73) by reinforcing ribs.

6. A check valve device with a slow-closing function according to claim 1, characterized in that, A sealing gasket is provided between the end cap (2) and the valve body (1).

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