One-way breakover valve for automatic shut-off valve

Abstract

The utility model discloses a one-way breakover valve for an automatic shut-off valve, and belongs to the technical field of valves. The valve comprises a valve body, a water inlet and a water outlet which are communicated are formed in the valve body, and a sealing face is arranged between the water inlet and the water outlet. A valve rod is movably arranged in the valve body, and a second sealing piece is arranged on the valve rod; when the second sealing piece abuts against the sealing face, the valve rod and the second sealing piece separate the water inlet from the water outlet. An adjusting rod and an elastic piece are arranged on the valve rod, the adjusting rod is movably connected with the valve rod through the elastic piece, and the adjusting rod is used for applying force towards the sealing face to the valve rod; one end of the valve rod extends out of the valve body to be connected with an operating rod, and the operating rod is connected with a flow measuring rod of the automatic shut-off valve and used for pushing the valve rod to move under the action of the flow measuring rod. According to the one-way conducting valve, when the adjusting rod moves towards the valve rod, force towards the sealing face can be applied to the valve rod through the elastic piece, so that the sealing piece tightly abuts against the sealing face, and sealing failure is avoided.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a one-way valve for an automatic shut-off valve. Background Technology

[0002] In water pipelines, pipe bursts can occur due to system or external factors. Without an automatic shut-off valve to cut off the pipeline, this can easily escalate into a major accident. The function of the automatic shut-off valve is to, in the event of a pipe burst, trigger a flow velocity sensor to detect abnormal water flow, activate an internal flow measuring rod, and pry open the operating rod of the one-way valve. This allows pressurized water to enter the diaphragm valve, executing the next step of valve closure, thereby cutting off the water flow and preventing secondary accidents. In existing automatic shut-off valves, the one-way valve stem, when sealing the inlet and outlet, is susceptible to poor sealing due to varying water pressures under different operating conditions. Excessive water pressure can cause the valve stem to be pushed up, resulting in poor sealing and making it unsuitable for different operating environments. Utility Model Content

[0003] 1. Technical problem to be solved by the utility model

[0004] To address the problem that existing one-way valves in automatic shut-off valves cannot provide a good seal under different water pressure conditions, this invention provides a one-way valve for automatic shut-off valves that can provide a good seal under different water pressure conditions.

[0005] 2. Technical Solution

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] This utility model discloses a one-way valve for an automatic shut-off valve, comprising a valve body with a communicating inlet and outlet, and a sealing surface between the inlet and outlet; a valve stem movably disposed within the valve body, and a second sealing element disposed on the valve stem; when the second sealing element abuts against the sealing surface, the valve stem and the second sealing element separate the inlet and outlet; an adjusting mechanism is disposed on the valve stem, the adjusting mechanism comprising an adjusting rod and an elastic element, the adjusting rod being movably connected to the valve stem via the elastic element, the adjusting rod being used to apply a force toward the sealing surface to the valve stem; one end of the valve stem extends out of the valve body and is connected to an operating rod, the operating rod being connected to a flow measuring rod of the automatic shut-off valve, and being used to push the valve stem to move under the action of the flow measuring rod.

[0008] As a further improvement of this utility model, a first top plate is provided on the valve stem, and the second sealing element is provided on the first top plate.

[0009] As a further improvement of this utility model, a second top plate is provided on the adjusting rod, one end of the elastic element abuts against the second top plate, and the other end abuts against the fixing nut on the second sealing element.

[0010] As a further improvement of this utility model, an adjustment hole is provided at the end of the adjustment rod, and one end of the valve rod is inserted into the adjustment hole.

[0011] As a further improvement of this utility model, a valve cover is provided on the valve body, and the adjusting rod passes through the valve cover, with one end extending into the valve body and the other end extending out of the valve body. The adjusting rod is threadedly connected to the valve cover.

[0012] As a further improvement of this utility model, an adjusting rod nut is provided on the end of the adjusting rod outside the valve body, and the adjusting rod nut is threadedly connected to the adjusting rod.

[0013] As a further improvement of this utility model, the valve stem is connected to the operating rod through a hinge, the operating rod has an oblong hole, and the hinge is set in the oblong hole by a fixing bolt.

[0014] As a further improvement of this utility model, one end of the operating rod is hinged to the fixed rod provided on the valve body, and the other end is connected to the flow measuring rod of the automatic shut-off valve.

[0015] As a further improvement of this utility model, a lower retaining ring and a first sealing element are provided between the end of the valve stem extending out of the valve body and the valve body.

[0016] As a further improvement of this utility model, a fourth sealing element is provided between the adjusting rod and the valve cover; and a third sealing element is provided between the valve cover and the valve body.

[0017] 3. Beneficial effects

[0018] Compared with existing known technologies, the technical solution provided by this utility model has the following significant advantages:

[0019] (1) The present invention provides a one-way valve for automatic shut-off valves, which separates the inlet and outlet water ports by driving the sealing element through the valve stem. When the sealing element abuts against the sealing surface, a seal is achieved. When the water pressure is too high, the valve stem will be lifted, thereby causing the sealing element to move away from the sealing surface. The present invention provides an adjustment mechanism on the valve stem, which includes an elastic element and an adjustment rod connected to the elastic element. The adjustment rod is movable. When the adjustment rod moves toward the valve stem, it can adjust the elastic force of the elastic element, thereby adjusting the magnitude of the force applied by the elastic element to the valve stem. This allows the opening response pressure of the one-way valve to be flexibly adjusted, and it has a wide range of applications.

[0020] (2) The present invention provides a one-way valve for automatic shut-off valve, wherein the second sealing element is fixed to the second top plate of the valve stem by a fixing nut, so that the second sealing element can be firmly fixed on the valve stem, thereby moving with the valve stem in a timely manner and the valve opening and closing response is timely.

[0021] (3) The present invention provides a one-way valve for automatic shut-off valve, wherein an adjustment hole is opened on the adjustment rod and one end of the valve rod is inserted into the adjustment hole, which plays a guiding role when the adjustment rod moves, so as to avoid the adjustment rod from deviating when it moves.

[0022] (4) The present invention provides a one-way valve for an automatic shut-off valve, wherein the adjusting rod is connected to the valve cover by a thread, which facilitates the up and down adjustment of the adjusting rod. An adjusting rod nut is threaded to the end of the adjusting rod, and the adjusting rod is locked after adjustment to ensure that it does not move.

[0023] (5) The present invention provides a one-way valve for an automatic shut-off valve, wherein the valve stem is connected to the operating rod, one end of the operating rod is hinged to the fixed rod, and the other end moves under the push of the flow measuring rod. The valve stem is set in the middle of the operating rod, and the operating rod forms a lever structure, which can easily push the valve stem to move, avoiding malfunction of the automatic shut-off valve due to slow response. Attached Figure Description

[0024] Figure 1 This is a front view of the unidirectional guide valve of this utility model;

[0025] Figure 2 This is a side sectional view of the unidirectional guide valve of this utility model;

[0026] Figure 3 This is a cross-sectional view of the inlet and outlet portions of this utility model.

[0027] Explanation of the labels in the diagram:

[0028] 1. Valve body; 21. Inlet; 22. Outlet; 23. Sealing surface; 3. Fixing rod; 4. Operating rod; 41. Hinge; 42. Fixing pin; 43. Fixing bolt; 5. Valve stem; 51. Lower retaining ring; 52. First sealing element; 53. First top plate; 54. Second sealing element; 55. Fixing nut; 6. Valve cover; 7. Adjusting rod nut; 8. Adjusting rod; 81. Adjusting hole; 82. Second top plate; 83. Third sealing element; 84. Fourth sealing element; 9. Elastic element. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 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 utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] Example

[0036] Example 1

[0037] Combination Figures 1-3 This embodiment provides a one-way valve for an automatic shut-off valve, comprising a valve body 1 with an inlet 21 and an outlet 22 on both sides, which are connected internally within the valve body 1. The valve body 1 has openings at both the upper and lower ends, with a valve cover 6 at the upper opening. A movable valve stem 5 is located inside the valve body 1, extending through the lower opening to the outside of the valve body 1. In this embodiment, the inlet 21 is positioned above the outlet 22, allowing water to flow in from the top and out from the bottom. When the valve is closed, water pressure acts on the second sealing element 54, preventing leakage even at high water pressures (PN25 or higher).

[0038] In this embodiment, a sealing surface 23 is provided between the inlet 21 and the outlet 22. The sealing surface 23 protrudes upward, and the protruding section contacts the second sealing element 54, which can form a larger sealing specific pressure, resulting in a better sealing effect. Inside the valve body 1, a valve stem 5 is movably arranged. One end of the valve stem 5 extends outside the valve body 1 and connects to the operating rod 4, and the other end connects to the adjusting rod 8. In this embodiment, a first top plate 53 is provided in the middle of the valve stem 5. A second sealing element 54 is provided on the first top plate 53, and a fixing nut 55 is provided on the second sealing element 54. The fixing nut 55 is threadedly connected to the valve stem 5, pressing the second sealing element 54 tightly onto the first top plate 53, so that the second sealing element 54 can be reliably fixed on the valve stem 5, thereby moving with the valve stem 5 in a timely manner and responding promptly to valve opening and closing. When the second sealing element 54 abuts against the sealing surface 23, the valve stem 5 and the second sealing element 54 separate the inlet 21 and the outlet 22, realizing valve closure. Since the diameters of the first top plate 53 and the valve stem 5 are smaller than the diameter of the connection between the inlet 21 and the outlet 22, water can flow through the connection when the second seal 54 leaves the sealing surface 23, thereby opening the valve. In this embodiment, the second seal 54 is a PTFE gasket.

[0039] In this embodiment, an adjusting rod 8 is provided at the upper end of the valve stem 5, and a second top plate 82 is provided at the end of the adjusting rod 8. One end of the elastic element 9 abuts against the second top plate 82, and the other end abuts against the fixing nut 55. When the adjusting rod 8 moves toward the valve stem 5, it applies pressure to the elastic element 9. The elastic element 9 then applies a downward force (i.e., a force toward the sealing surface 23) to the valve stem 5 through the fixing nut 55, thereby making the second sealing element 54 tightly abut against the sealing surface 23, preventing the valve stem 5 from being lifted due to excessive water pressure and causing sealing failure. In this embodiment, an adjusting hole 81 is also provided at the end of the adjusting rod 8. One end of the valve stem 5 is inserted into the adjusting hole 81, which serves as a guide when the adjusting rod 8 moves, preventing the adjusting rod 8 from deviating during movement. In this embodiment, the elastic element 9 is a spring, sleeved on the valve stem 5. In this embodiment, an adjustment mechanism is provided on the valve stem 5. The adjustment mechanism includes an elastic element 9 and an adjustment rod 8 connected to the elastic element 9. The adjustment rod 8 is movably arranged. When the adjustment rod 8 moves toward the valve stem 5, it can adjust the elastic force of the elastic element 9, thereby adjusting the magnitude of the force applied by the elastic element 9 to the valve stem 5. This allows the opening response pressure of the one-way valve to be flexibly adjusted, making it widely applicable.

[0040] In this embodiment, the adjusting rod 8 passes through the valve cover 6, with one end extending into the valve body 1 and the other end extending out of the valve body 1. The adjusting rod 8 is threadedly connected to the valve cover 6. When adjustment of the adjusting rod 8 is required, rotating the adjusting rod 8 will adjust its height. An adjusting rod nut 7 is provided on the end of the adjusting rod 8 located outside the valve body 1, and the adjusting rod nut 7 is threadedly connected to the adjusting rod 8. After the adjusting rod 8 is adjusted, the adjusting rod nut 7 locks the adjusting rod 8, thereby ensuring that it does not move. In this embodiment, a fourth sealing element 84 is provided between the adjusting rod 8 and the valve cover 6, and a third sealing element 83 is provided between the valve cover 6 and the valve body 1, thereby achieving a seal and preventing liquid leakage from the valve body 1.

[0041] In this embodiment, one end of the valve stem 5 extends out of the valve body 1 and connects to the operating rod 4. The operating rod 4 is connected to the flow measuring rod of the automatic shut-off valve and is used to push the valve stem 5 to move under the action of the flow measuring rod. Specifically, the valve stem 5 is connected to the operating rod 4 via a hinge 41. An oblong hole is opened in the middle of the operating rod 4, and the hinge 41 is set in the oblong hole by a fixing bolt 43. One end of the operating rod 4 is hinged to the fixing rod 3 provided on the valve body 1, and the other end is connected to the flow measuring rod of the automatic shut-off valve. The operating rod 4 and the fixing rod 3 are connected by a fixing pin 42. In this embodiment, the valve stem 5 is connected to the operating rod 4, one end of the operating rod 4 is hinged to the fixing rod 3, and the other end moves under the push of the flow measuring rod. The valve stem 5 is located in the middle of the operating rod 4, and the operating rod 4 forms a lever structure, which can easily push the valve stem 5 to move, avoiding malfunction of the automatic shut-off valve due to slow response. In this embodiment, a lower retaining ring 51 and a first sealing element 52 are provided between the end of the valve stem 5 extending out of the valve body 1 and the valve body 1. The lower retaining ring 51 is fixedly connected to the valve body 1, limiting the first sealing element 52 and preventing leakage at this location. In this embodiment, the first sealing element 52 is a Y-shaped sealing ring.

[0042] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A one-way guide valve for an automatic shut-off valve, characterized in that, The system includes a valve body (1) with a communicating inlet (21) and outlet (22), and a sealing surface (23) between the inlet (21) and outlet (22); a valve stem (5) is movably disposed within the valve body (1), and a second sealing element (54) is disposed on the valve stem (5); when the second sealing element (54) abuts against the sealing surface (23), the valve stem (5) and the second sealing element (54) close the inlet (21). Separated from the outlet (22); the valve stem (5) is provided with an adjustment mechanism, which includes an adjustment rod (8) and an elastic element (9). The adjustment rod (8) is movably connected to the valve stem (5) through the elastic element (9). The elastic element (9) is used to apply a force toward the sealing surface (23) to the valve stem (5). The adjustment rod (8) is used to adjust the elastic force of the elastic element (9). One end of the valve stem (5) extends out of the valve body (1) and is connected to the operating rod (4).

2. The one-way valve for an automatic shut-off valve according to claim 1, characterized in that, The valve stem (5) is provided with a first top plate (53), and the second sealing element (54) is provided on the first top plate (53).

3. A one-way valve for an automatic shut-off valve according to claim 2, characterized in that, The adjusting rod (8) is provided with a second top plate (82), and one end of the elastic member (9) abuts against the second top plate (82), and the other end abuts against the fixing nut (55) on the second sealing member (54).

4. A one-way valve for an automatic shut-off valve according to claim 1, characterized in that, An adjustment hole (81) is provided at the end of the adjustment rod (8), and one end of the valve rod (5) is inserted into the adjustment hole (81).

5. A one-way valve for an automatic shut-off valve according to claim 1, characterized in that, A valve cover (6) is provided on the valve body (1). The adjusting rod (8) passes through the valve cover (6), with one end extending into the valve body (1) and the other end extending out of the valve body (1). The adjusting rod (8) is threadedly connected to the valve cover (6).

6. A one-way valve for an automatic shut-off valve according to claim 5, characterized in that, The adjusting rod (8) is provided with an adjusting rod nut (7) on its end outside the valve body (1), and the adjusting rod nut (7) is threadedly connected to the adjusting rod (8).

7. A one-way valve for an automatic shut-off valve according to claim 1, characterized in that, The valve stem (5) is connected to the operating rod (4) via a hinge (41). The operating rod (4) has an oblong hole, and the hinge (41) is movably installed in the oblong hole via a fixing bolt (43).

8. A one-way valve for an automatic shut-off valve according to claim 7, characterized in that, One end of the operating lever (4) is hinged to the fixing rod (3) provided on the valve body (1).

9. A one-way valve for an automatic shut-off valve according to any one of claims 1-8, characterized in that, A lower retaining ring (51) and a first sealing element (52) are provided between the end of the valve stem (5) extending out of the valve body (1) and the valve body (1).

10. A one-way valve for an automatic shut-off valve according to claim 5, characterized in that, A fourth sealing element (84) is provided between the adjusting rod (8) and the valve cover (6); a third sealing element (83) is provided between the valve cover (6) and the valve body (1).

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