Valve capable of being automatically closed when water is cut off

Abstract

The utility model discloses a valve capable of being closed automatically during water cut-off, relates to the technical field of valves, and aims to solve the problem that a valve is large in size and inconvenient to install after a sedimentation cup is arranged. The valve capable of being closed automatically during water cut-off comprises a valve body, and a water inlet cavity and a water outlet cavity are sequentially formed in the valve body from top to bottom. The top end of the valve body is further provided with a water pressure cylinder body, a piston cavity is formed in the water pressure cylinder body, a piston rod is arranged in the piston cavity in a penetrating mode, a movable plug matched with the piston cavity is arranged on the piston rod, the piston cavity is communicated with the water inlet cavity, and the water inlet cavity is communicated with the water outlet cavity. A spring is arranged in the piston cavity and arranged on the piston rod in a sleeving mode, and the bottom end of the spring abuts against the movable plug. The bottom end of the piston is connected with a water closing plug matched with the communicating hole, and the water closing plug is arranged in the water inlet cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a water cut-off automatic closing valve. Background Art

[0002] A valve is a pipeline accessory used to open and close pipelines, control the flow direction, and adjust and control the parameters (temperature, pressure, and flow rate) of the transported medium. According to its functions, it can be divided into a shut-off valve, a check valve, a regulating valve, etc.

[0003] The common problem with valves currently is that some users often turn on the faucet when the water supply is cut off so as to be able to judge whether water comes in the first moment when the water comes. However, it is very easy to forget to close the faucet at this time. Therefore, a large amount of water will be drained when the water comes. If there is no one at home at this time, a large amount of resource waste will occur. At the same time, it is also easy to cause water to penetrate to the lower-level users.

[0004] In order to solve the above problems, the valve disclosed in the Chinese patent with the title of water cut-off automatic closing valve and water supply system and the publication number of CN113266691A can achieve, at the moment when the water comes, relying on the driving force of the water flow on the piston assembly and the upward force of the spring assembly on the piston assembly, to ensure the sealing of the first chamber by the piston assembly and realize the function of automatically closing the water.

[0005] However, in the above patent, it is also necessary to be installed with a sediment cup in cooperation. The sediment cup is used to connect the second chamber and the piston chamber, so that the water flow in the second chamber can play a certain driving role on the piston assembly in the piston chamber, and then the piston assembly reaches a balanced state. However, setting the sediment cup will increase the volume of the valve, resulting in inconvenient installation. Summary of the Utility Model

[0006] To solve the above problems, that is, the problem that the volume of the valve is large and inconvenient to install after setting the sediment cup, the utility model provides a water cut-off automatic closing valve, which includes a valve body. An inlet chamber and an outlet chamber are sequentially arranged in the valve body from top to bottom. The inlet chamber and the outlet chamber are connected through a communication hole. A hydraulic cylinder body is further installed at the top end of the valve body. A piston chamber is arranged in the hydraulic cylinder body. A piston rod penetrates through the piston chamber. An activity plug adapted to the piston chamber is arranged on the piston rod. The piston chamber is connected with the inlet chamber. A spring is arranged in the piston chamber. The spring is sleeved on the piston rod. The bottom end of the spring abuts against the activity plug. The bottom end of the piston is connected with a water cut-off plug adapted to the communication hole. The water cut-off plug is arranged in the inlet chamber.

[0007] A further setting of the present utility model is that an adjusting cap is threadedly connected to the top end of the hydraulic cylinder body, the top end of the piston rod penetrates through the adjusting cap, and the top end of the spring abuts against the adjusting cap.

[0008] A further setting of the present utility model is that the communication hole is arranged as a stepped hole, and the water-blocking plug is provided with an outward-turned edge adapted thereto for limiting the downward movement of the piston rod.

[0009] The beneficial effects of the present utility model are as follows:

[0010] 1. Through the cooperation of the water inlet cavity and the spring, the piston rod can be in a relatively balanced state. Then, by applying an external force, the opening and closing of the valve can be controlled. When the water supply stops, since there is no water flow in the water inlet cavity, there is no water inlet pressure. At this time, the piston rod will automatically close under the action of the elastic force of the spring, thus avoiding the state where the valve is not closed when the water comes. Moreover, the valve structure disclosed in this application is simple, smaller in volume, and more convenient for installation.

[0011] 2. By threadedly connecting the adjusting cap to the hydraulic cylinder body, the function of adjusting the pre-tightening force of the spring can be achieved. Further, the pre-tightening force of the spring can be adjusted according to the water pressure situation, so that the valve can adapt to different water pressure situations and has a wider application range.

[0012] 3. Through the cooperation of the stepped communication hole and the outward-turned edge of the water-blocking plug, the downward movement of the piston rod can be further limited. On the premise of ensuring that the communication hole is blocked, the excessive downward movement of the piston rod can be avoided. Description of the Drawings

[0013] Figure 1 A partial cross-sectional view of the present utility model is shown.

[0014] Figure 2 Shown is Figure 1 the front view of

[0015] Figure 3 A structural schematic diagram after removing the piston rod is shown.

[0016] Figure 4 A cross-sectional view in the A-A direction is shown.

[0017] Reference numerals: 1, valve body; 11, water inlet cavity; 111, water inlet; 12, water outlet cavity; 121, water outlet; 13, communication hole; 2, hydraulic cylinder body; 21, piston cavity; 22, spring; 3, piston rod; 31, movable plug; 311, sealing gasket; 32, water-blocking plug; 321, outward-turned edge; 4, adjusting cap. Detailed Embodiments

[0018] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.

[0019] The present utility model provides a water cut-off automatic shut-off valve, which includes a valve body 1. An inlet cavity 11 and an outlet cavity 12 are successively formed in the valve body 1 from top to bottom. An inlet 111 is formed in the inlet cavity 11, and the inlet 111 is used to connect to the household water pipe. An outlet 121 is formed in the outlet cavity 12, and the outlet 121 is used to connect to the water-using water pipe.

[0020] The inlet cavity 11 is communicated with the outlet cavity 12 through a communication hole 13. The top end of the valve body 1 is connected with a hydraulic cylinder body 2 by bolts. A piston cavity 21 is formed inside the hydraulic cylinder body 2. The piston cavity 21 is communicated with the inlet cavity 11. A piston rod 3 is penetrated in the piston cavity 21. The bottom end of the piston rod 3 extends into the inlet cavity 11, and the top end of the piston rod 3 extends out of the piston cavity 21.

[0021] A movable plug 31 adapted to the piston cavity 21 is fixedly connected to the piston rod 3. A sealing gasket 311 is fixedly connected to the upper surface of the movable plug 31. The movable plug 31 is arranged in the piston cavity 21. A spring 22 is also arranged in the piston cavity 21. The spring 22 is coaxially sleeved on the piston rod 3, and the bottom end of the spring 22 abuts against the sealing gasket 311 on the upper surface of the movable plug 31 to apply the elastic force of the spring 22 to the movable plug 31. The top end of the piston rod 3 is fixedly connected with a water shut-off plug 32. The water shut-off plug 32 is adapted to the communication hole 13. The water shut-off plug 32 is arranged in the inlet cavity 11. Therefore, when the piston rod 3 drives the water shut-off plug 32 to move downward, the purpose of blocking the communication hole 13 with the water shut-off plug 32 can be achieved, and thus the communication between the inlet cavity 11 and the outlet cavity 12 can be blocked to realize the function of closing the valve.

[0022] The top end of the hydraulic cylinder body 2 is threadedly connected with an adjusting cap 4. The top end of the piston rod 3 penetrates through the adjusting cap 4. The top end of the spring 22 abuts against the adjusting cap 4. When the adjusting cap 4 is rotated to move downward, the compression of the spring 22 can be realized, and thus the pre-tightening force of the spring 22 can be increased. When the adjusting cap 4 is rotated to move upward, the spring 22 is relaxed, and thus the pre-tightening force of the spring 22 is reduced.

[0023] Through the threaded connection between the adjusting cap 4 and the hydraulic cylinder body 2, the pre-tightening force of the spring 22 can be adjusted, and thus the spring 22 can be adjusted according to different water pressure conditions, so that the valve in this application can be applicable to different water pressure conditions.

[0024] The communication hole 13 is arranged as a stepped hole, and the water-blocking plug 32 is provided with an outward-turned edge 321 adapted thereto. When the piston rod 3 moves downward, the outward-turned edge 321 can abut against the stepped communication hole 13, so that the communication hole 13 can be blocked and the downward movement of the piston rod 3 can be limited to prevent the piston rod 3 from moving excessively.

[0025] Usage:

[0026] Water usage under normal water supply: Pull the piston rod 3 upward to move the water-blocking plug 32 upward, so that it is separated from the communication hole 13, and the water inlet cavity 11 is communicated with the water outlet cavity 12. At this time, the water pressure acting on the movable plug 31 in the water inlet cavity 11 will offset the elastic force of the spring 22 to maintain the force balance of the piston rod 3. At this time, the effect of continuous water outlet and water usage can be achieved.

[0027] Water cut-off under normal water supply: Push the piston rod 3 downward to move the water-blocking plug 32 downward until the outward-turned edge 321 abuts against the stepped communication hole 13, so that the water inlet cavity 11 is communicated with the water outlet cavity 12. At this time, the water pressure in the water inlet cavity 11 will act not only on the movable plug 31 but also on the water-blocking plug 32. Then, combined with the elastic force of the spring 22, the three acting forces will cancel each other out to maintain the force balance of the piston rod 3. At this time, the effect of closing the valve to cut off water can be achieved.

[0028] It should be noted that before using the above two situations, the adjusting cap 4 needs to be adjusted according to the water pressure situation so that the pre-tightening force of the spring 22 can meet the normal use in the above two situations.

[0029] Water cut-off situation: When there is a water cut-off, since there is no water in the water inlet cavity 11, there is no pressure. At this time, the piston rod 3 is only affected by the elastic force of the spring 22. Under the action of the elastic force, the piston rod 3 will move downward until the outward-turned edge 321 on the water-blocking plug 32 abuts against the stepped communication hole 13. At this time, the water inlet cavity 11 and the water outlet cavity 12 are in a blocked state. Therefore, even if water comes, there will be no water leakage phenomenon. Therefore, through this valve, the effect of automatically closing when there is a water cut-off can be achieved, and the problem of water leakage due to forgetting to close the valve after water comes can be avoided.

[0030] In summary, through the cooperation of the water inlet cavity 11 and the spring 22, the present utility model can make the piston rod 3 in a relatively balanced state. Then, by applying an external force, the opening and closing of the valve can be controlled. When there is a water cut-off, since there is no water flow in the water inlet cavity 11, there is no inlet water pressure. At this time, the piston rod 3 will be automatically closed under the action of the elastic force of the spring 22, thus avoiding the state that the valve is not closed when water comes. And the valve structure disclosed in this application is simple, has a smaller volume, and is more convenient for installation.

[0031] By threadedly connecting the adjusting cap 4 to the hydraulic cylinder body 2, the function of adjusting the pre-tightening force of the spring 22 can be achieved. Further, the pre-tightening force of the spring 22 can be adjusted according to the water pressure situation, enabling the valve to adapt to different water pressure situations and having a wider scope of application.

[0032] Through the cooperation of the stepped communication hole 13 and the outward flange 321 of the water shutoff plug 32, the downward movement of the piston rod 3 can be further limited. On the premise of ensuring that the communication hole 13 is blocked, the excessive downward movement of the piston rod 3 can be avoided.

[0033] Although the present invention has been described with reference to the preferred embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0034] In the description of the present invention, the terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., which indicate directions or position relationships, are based on the directions or position relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0035] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, so that a process, article, or device / equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in these processes, articles, or devices / equipment.

[0037] So far, the technical solution of the present utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easily understood by those skilled in the art that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present utility model.

Claims

1. A water cut-off automatic shut-off valve, characterized in that: It includes a valve body (1). An inlet chamber (11) and an outlet chamber (12) are successively formed in the valve body (1) from top to bottom. The inlet chamber (11) and the outlet chamber (12) are communicated through a communication hole (13). A hydraulic cylinder body (2) is further installed at the top of the valve body (1). A piston chamber (21) is formed in the hydraulic cylinder body (2). A piston rod (3) is inserted into the piston chamber (21). A movable plug (31) adapted to the piston chamber (21) is arranged on the piston rod (3). The piston chamber (21) is communicated with the inlet chamber (11). A spring (22) is arranged in the piston chamber (21). The spring (22) is sleeved on the piston rod (3). The bottom end of the spring (22) abuts against the movable plug (31). The bottom end of the piston is connected with a water shut-off plug (32) adapted to the communication hole (13). The water shut-off plug (32) is arranged in the inlet chamber (11).

2. The automatic water shut-off valve according to claim 1, characterized in that: An adjusting cap (4) is threadedly connected to the top of the hydraulic cylinder body (2). The top end of the piston rod (3) penetrates through the adjusting cap (4). The top end of the spring (22) abuts against the adjusting cap (4).

3. The automatic shut-off valve for water cut-off according to claim 1, characterized in that: The communication hole (13) is arranged as a stepped hole. The water shut-off plug (32) is provided with an outward-turned edge (321) adapted thereto for limiting the downward movement of the piston rod (3).

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