Automatically shut down valves and water supply systems when water is cut off

Abstract

The present invention provides an automatic water shut-off valve and a water supply system, the automatic water shut-off valve comprising: an upper valve body, a piston cavity is arranged in the upper valve body, and a pressure discharge hole and a pressure inlet hole are opened in the piston cavity; a lower valve body is arranged in the upper valve body, and a first chamber and a second chamber are arranged in the lower valve body; a sedimentation cup is respectively connected to the pressure inlet hole and the second chamber; a water inlet is arranged in the lower valve body and connected to the second chamber; a water outlet is arranged in the lower valve body and connected to the first chamber; a piston assembly is passed through the piston cavity and extends through the first chamber to the second chamber; a spring assembly is screwed to the piston assembly and arranged in the upper valve body. The driving force of the water flow in the second chamber on the piston assembly and the upward force of the spring assembly on the piston assembly ensures the sealing of the piston assembly to the first chamber, and the function of automatic water shut-off is realized.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, in particular to an automatic water shut-off valve and a water supply system. Background Art

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure, and flow) of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc.

[0003] A common problem now is that some users often turn on the faucet when there is a water outage to determine whether there is water, but forget to turn off the faucet at this time. As a result, a large amount of water is discharged when the water comes back, which on the one hand causes a waste of water resources, and on the other hand easily causes water to penetrate into the lower-level users. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0005] To this end, a first aspect of the present invention provides an automatic closing valve when water is cut off.

[0006] A second aspect of the present invention provides a water supply system.

[0007] The present invention provides an automatic closing valve for water outage, comprising: an upper valve body, a piston cavity is provided in the upper valve body, and a pressure discharge hole and a pressure inlet hole are opened in the piston cavity; a lower valve body is arranged on the upper valve body, and a first chamber and a second chamber are provided in the lower valve body; a sedimentation cup is respectively connected to the pressure inlet hole and the second chamber; a water inlet is arranged on the lower valve body and connected to the second chamber; a water outlet is arranged on the lower valve body and connected to the first chamber; a piston assembly passes through the piston cavity and extends through the first chamber into the second chamber; a spring assembly is screwed to the piston assembly and arranged on the upper valve body.

[0008] The water shut-off automatic closing valve proposed in the present invention comprises an upper valve body, a lower valve body, a water inlet, a water outlet, a piston assembly and a spring assembly. Among them, a piston cavity is arranged in the upper valve body, which is used to provide an installation space for the piston assembly on the one hand, and to provide a holding space for water on the other hand, so that there is a contact surface between the water and the piston assembly, and further realizes the water-driven movement of the piston assembly. Specifically, the upper valve body can be a cylindrical structure, and the piston cavity is arranged in the upper valve body in a cavity structure. Specifically, the piston cavity is provided with a pressure discharge hole and a pressure inlet hole. The pressure discharge hole is used to discharge the pressure in the piston cavity in time when the piston assembly performs piston movement, so as to avoid affecting the movement of the piston assembly. The pressure inlet hole is used to receive the gas-water mixture from the sedimentation cup, so as to ensure that the gas-water mixture drives the piston assembly. The lower valve body provides space for the arrangement of the first chamber and the second chamber, ensures that the first chamber and the second chamber can be formed, and further ensures that the piston assembly can be arranged in the first chamber and the second chamber. In addition, the first chamber and the second chamber can also accommodate the passage of water flow, thereby ensuring that the water flow contacts the piston assembly, and further realizing the driving of the piston assembly by the water flow in the first chamber and the second chamber. On the one hand, the sedimentation cup receives the water flow from the second chamber, thereby squeezing the gas contained in it into the piston chamber. This process is also accompanied by part of the water flow entering the piston chamber, and further driving the piston assembly to move in the piston chamber through the gas-water mixture. On the other hand, it can also prevent large particles of sand and gravel in the water flow from entering the piston chamber, thereby affecting the movement of the piston assembly. In addition, since the piston assembly may cause impurities such as lubricating oil in the piston chamber during the installation process, during the movement of the piston assembly, the water flow that contacts the impurities will directly return to the sedimentation cup, thereby preventing the contaminated water flow from entering the main water supply pipeline and ensuring the purity of the water quality. The water inlet is used to connect the main water supply pipeline. The water outlet is used for water flow outflow. The piston assembly can move upwards through the driving force of the water flow in the second chamber, so that when the water suddenly comes back after the water is cut off, the first chamber can be closed in time to further prevent the water from flowing out, thus realizing the function of automatic water shut-off, and preventing the waste of water resources and the water from penetrating to the users on the lower floor. In addition, the spring assembly can provide an upward force for the piston assembly, thereby cooperating with the driving force of the water flow in the second chamber on the piston assembly, so that the piston assembly is subjected to a sufficiently large upward force, further preventing the valve from leaking as a whole, and improving the sealing of the valve.

[0009] Therefore, in the case of a sudden water supply after the water supply is cut off, the driving force of the water flow in the second chamber on the piston assembly and the upward force of the spring assembly on the piston assembly ensure that the piston assembly is sealed to the first chamber, thereby realizing the function of automatic water shut-off. In addition, compared to a float-type water stop valve, there is a situation where the float drops and squeezes out part of the water flow to cause water leakage. The present invention can prevent the water flow from flowing out of the water outlet, thereby having better water leakage prevention and sealing properties. Compared with a traditional piston-type water stop valve, the piston assembly of the present invention can be in a state of motion under normal use due to the dual driving force of the gas-water mixture in the piston chamber and the water flow in the second chamber, thereby avoiding the piston assembly from getting stuck due to the formation of scale or aging of the piston assembly.

[0010] The water cut-off automatic closing valve according to the above technical solution of the present invention may also have the following additional technical features:

[0011] In the above technical solution, the first chamber is formed by an L-shaped plate, and the L-shaped plate has an opening.

[0012] In this technical solution, the first chamber is surrounded by an L-shaped plate, and the L-shaped plate has an opening. The L-shaped plate can separate the first chamber and the second chamber, thereby forming independent structures to avoid mutual influence. The opening is used for the passage of water flow and can also limit the position of the lower end of the piston assembly to prevent the piston assembly from being unable to reset due to excessive movement.

[0013] In the above technical solution, the piston assembly includes: a piston rod, which passes through the piston cavity and extends through the first cavity to the second cavity; a movable plug, which is arranged on the piston rod and located in the piston cavity; and a water-blocking plug, which is arranged on the piston rod and located in the second cavity; wherein the length of the water-blocking plug is greater than the opening of the L-shaped plate and the short plate.

[0014] In this technical solution, the piston assembly includes a piston rod, a movable plug and a water-blocking plug. The piston rod is a rod structure, which is used to provide an installation position for the movable plug and the water-blocking plug. The movable plug is used to withstand the driving force of the gas-water mixture in the piston chamber, thereby driving the piston rod to move. In addition, in the case of a sudden water supply after the water supply is cut off, the upward movement of the piston rod drives the movable plug to move upward and blocks the pressure inlet hole, thereby preventing the piston rod from being subjected to the driving force of the gas-water mixture in the piston chamber at this time to balance the upward force of the piston rod, thereby further improving the sealing performance. The water-blocking plug is used to withstand the driving force of the water flow from the second chamber, thereby driving the piston rod to move. The length of the water-blocking plug is greater than the opening of the opening on the L-shaped plate, thereby preventing the water-blocking plug from failing to seal the first chamber, thereby further improving the overall sealing performance.

[0015] In the above technical solution, the water-cut automatic closing valve also includes: a water-cutting rubber pad, which is arranged on the water-cutting seal.

[0016] In the technical solution, the water-off automatic closing valve also includes a water-off rubber pad, which can be a rubber sealing ring, for improving the sealing performance of the water-off seal.

[0017] In the above technical solution, the spring assembly includes: a pressure nut, which is screwed to the piston rod; and a spring, which is respectively connected to the pressure nut and the upper valve body.

[0018] In this technical solution, the spring assembly includes a pressure nut and a spring. The pressure nut is screwed to the piston rod, so springs of different specifications can be installed by adjusting the position of the pressure nut. The spring is used to provide an upward driving force for the piston rod, thereby cooperating with the driving force of the water flow in the second chamber to further improve the sealing of the valve.

[0019] The above technical solution also includes: a drain pipe, which is arranged on the sedimentation cup; and a one-way valve, which is arranged on the drain pipe.

[0020] The technical solution also includes a drain pipe and a one-way valve. The drain pipe is used to timely discharge the sewage inside the sedimentation cup after long-term use, thereby ensuring the cleanliness of the sedimentation cup and preventing the sewage from further corroding the piston cavity and the sedimentation cup. The one-way valve is used to control the passage of water.

[0021] The present invention also provides a water supply system, including a water inlet system; an automatic water shut-off valve as described in any of the above technical solutions, the water inlet of the automatic water shut-off valve being connected to the water inlet system; and a water outlet system being connected to the water outlet of the automatic water shut-off valve.

[0022] The water supply system provided by the present invention comprises a water inlet system, an automatic water shut-off valve as described in any of the above technical solutions, and a water outlet system. The water inlet system can be a main water supply pipeline, i.e., a water inlet pipeline, used to provide water supply to users. The automatic water shut-off valve has all the beneficial effects of the above technical solutions, which will not be repeated here. The water outlet system can be a water outlet pipeline, used to transport water flow.

[0023] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1This is one of the structural diagrams of the water-off automatic closing valve of one embodiment of the present invention (in normal use);

[0026] Figure 2 This is the second structural diagram of the water-off automatic closing valve of one embodiment of the present invention (in a sealed state);

[0027] Figure 3 It is a structural diagram of a water supply system according to another embodiment of the present invention.

[0028] in, Figures 1 to 3 The corresponding relationship between the reference numerals and the component names is as follows:

[0029] 102 upper valve body, 1022 piston chamber, 1024 pressure discharge hole, 1026 pressure inlet hole, 104 lower valve body, 1042 first chamber, 1044 second chamber, 106 water inlet, 108 water outlet, 110 piston assembly, 1102 piston rod, 1104 movable plug, 1106 water shut-off seal, 112 spring assembly, 1122 pressure nut, 1124 spring, 114 water shut-off rubber pad, 116 sedimentation cup, 118 drain pipe, 120 one-way valve, 202 water inlet system, 204 water stop automatic closing valve, 206 water outlet system. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0032] Refer to the following Figures 1 to 3 The following describes the water outage automatic shut-off valve and water supply system provided according to some embodiments of the present invention.

[0033] like Figure 1As shown, the first type of automatic closing valve for water outage of the present invention comprises: an upper valve body 102, in which a piston cavity 1022 is provided, and the piston cavity 1022 is provided with a pressure discharge hole 1024 and a pressure inlet hole 1026; a lower valve body 104, which is arranged on the upper valve body 102, and a first chamber 1042 and a second chamber 1044 are provided in the lower valve body 104; a sedimentation cup 116, which is respectively connected to the pressure inlet hole 1026 and the second chamber 1044; a water inlet 106, which is arranged on the lower valve body 104 and connected to the second chamber 1044; a water outlet 108, which is arranged on the lower valve body 104 and connected to the first chamber 1042; a piston assembly 110, which passes through the piston cavity 1022 and extends through the first chamber 1042 to the second chamber 1044; and a spring assembly 112, which is screwed to the piston assembly 110 and arranged on the upper valve body 102.

[0034] The water-stop automatic closing valve proposed in the present invention comprises an upper valve body 102, a lower valve body 104, a water inlet 106, a water outlet 108, a piston assembly 110 and a spring assembly 112. Among them, a piston cavity 1022 is arranged in the upper valve body 102, which is used to provide an installation space for the piston assembly 110 on the one hand, and to provide a holding space for water on the other hand, so that there is a contact surface between the water and the piston assembly 110, and further realizes the water-driven movement of the piston assembly 110. Specifically, the upper valve body 102 can be a cylindrical structure, and the piston cavity 1022 is arranged in the upper valve body 102 in a cavity structure. Specifically, the piston cavity 1022 is provided with a pressure discharge hole 1024 and a pressure inlet hole 1026. The pressure discharge hole 1024 is used to discharge the pressure in the piston cavity 1022 in time when the piston assembly 110 performs piston movement, so as to avoid affecting the movement of the piston assembly 110. The pressure inlet hole 1026 is used to receive the gas-water mixture from the precipitation cup 116, so as to ensure that the gas-water mixture drives the piston assembly 110. The lower valve body 104 provides space for the arrangement of the first chamber 1042 and the second chamber 1044, so as to ensure that the first chamber 1042 and the second chamber 1044 can be formed, and further ensure that the piston assembly 110 can be arranged in the first chamber 1042 and the second chamber 1044. In addition, the first chamber 1042 and the second chamber 1044 can also accommodate the passage of water flow, so as to ensure that the water flow contacts the piston assembly 110, and further realize the water flow driving the piston assembly 110 in the first chamber 1042 and the second chamber 1044. On the one hand, the precipitation cup 116 receives the water flow from the second chamber 1044, so as to squeeze the gas contained in it into the piston chamber 1022, and this process is also accompanied by part of the water flow entering the piston chamber 1022, and further drives the piston assembly 110 to move in the piston chamber 1022 through the gas-water mixture. On the other hand, it can also prevent large particles of sand and gravel in the water flow from entering the piston chamber 1022, thereby affecting the movement of the piston assembly 110. In addition, since the piston assembly 110 may cause impurities such as lubricating oil to exist in the piston chamber 1022 during the installation process, the water flow that contacts the impurities will directly return to the sedimentation cup 116 during the movement of the piston assembly 110, thereby preventing the polluted water flow from entering the main water supply pipeline and ensuring the purity of the water quality. The water inlet 106 is used to connect the main water supply pipeline. The water outlet 108 is used for water flow outflow. The piston assembly 110 can achieve upward movement through the drive of the water flow in the second chamber 1044, so that when the water suddenly comes after the water is cut off, the first chamber 1042 is closed in time to further prevent the water flow from flowing out, realize the function of automatic water closing, and prevent the waste of water resources and the situation of water infiltration to the lower users. In addition, the spring assembly 112 can provide an upward force for the piston assembly 110, thereby cooperating with the driving force of the water flow on the piston assembly 110 in the second chamber 1044, so that the upward force on the piston assembly 110 is large enough, further avoiding water leakage of the entire valve and improving the sealing of the valve.

[0035] Therefore, in the case of a sudden water supply after the water supply is cut off, the driving force of the water flow in the second chamber 1044 on the piston assembly 110 and the upward force of the spring assembly 112 on the piston assembly 110 ensure that the piston assembly 110 is sealed to the first chamber 1042, thereby realizing the function of automatic water shut-off. In addition, compared with the float-type water stop valve, there is a situation where the float drops and squeezes out part of the water flow to cause water leakage. The present invention can prevent the water flow from flowing out of the water outlet 108, thereby having better water leakage prevention and sealing. Compared with the traditional piston-type water stop valve, the piston assembly 110 of the present invention can be in a state of motion under normal use due to the dual driving force of the gas-water mixture in the piston chamber 1022 and the water flow in the second chamber 1044, thereby avoiding the piston assembly 110 from getting stuck due to the formation of scale or the aging of the piston assembly 110.

[0036] Specifically, the first chamber 1042 is surrounded by an L-shaped plate, and the L-shaped plate has an opening.

[0037] In this embodiment, the first chamber 1042 is surrounded by an L-shaped plate, and the L-shaped plate has an opening. The L-shaped plate can separate the first chamber 1042 and the second chamber 1044, thereby forming a mutually independent structure to avoid mutual influence. The opening is used for the passage of water flow, and can also limit the position of the lower end of the piston assembly 110 to prevent the piston assembly 110 from being unable to reset due to excessive movement.

[0038] Specifically, the piston assembly 110 includes: a piston rod 1102, which passes through the piston cavity 1022 and extends through the first chamber 1042 to the second chamber 1044; a movable plug 1104, which is arranged on the piston rod 1102 and located in the piston cavity 1022; a water-blocking plug 1106, which is arranged on the piston rod 1102 and located in the second chamber 1044; wherein the length of the water-blocking plug 1106 is greater than the opening of the opening on the L-shaped plate.

[0039] In this embodiment, the piston assembly 110 includes a piston rod 1102, a movable plug 1104 and a water-blocking plug 1106. The piston rod 1102 is a rod structure, which is used to provide an installation position for the movable plug 1104 and the water-blocking plug 1106. The movable plug 1104 is used to withstand the driving force of the gas-water mixture in the piston chamber 1022, thereby driving the piston rod 1102 to move. In addition, in the case of a sudden water supply after the water supply is cut off, the upward movement of the piston rod 1102 drives the movable plug 1104 to move upward and blocks the pressure inlet hole 1026, thereby preventing the piston rod 1102 from being subjected to the driving force of the gas-water mixture in the piston chamber 1022 at this time to balance the upward force of the piston rod 1102, further improving the sealing performance. The water-blocking plug 1106 is used to withstand the water flow driving force from the second chamber 1044, thereby driving the piston rod 1102 to move. Furthermore, the length of the water-tight seal 1106 is greater than the opening of the L-shaped plate, thereby preventing the water-tight seal 1106 from failing to seal the first chamber 1042, thereby further improving the overall sealing performance.

[0040] Specifically, the water-out automatic closing valve also includes: a water-out rubber pad 114 , which is arranged on the water-out seal 1106 .

[0041] In this embodiment, the water cut-off automatic closing valve further includes a water-blocking rubber pad 114. The water-blocking rubber pad 114 can be a rubber sealing ring, which is used to improve the sealing performance of the water-blocking plug 1106.

[0042] Specifically, the spring assembly 112 includes: a pressure nut 1122 screwed to the piston rod 1102; and a spring 1124 connected to the pressure nut 1122 and the upper valve body 102 respectively.

[0043] In this embodiment, the spring assembly 112 includes a pressure nut 1122 and a spring 1124. The pressure nut 1122 is screwed to the piston rod 1102, so springs 1124 of different specifications can be installed by adjusting the position of the pressure nut 1122. The spring 1124 is used to provide an upward driving force for the piston rod 1102, thereby cooperating with the driving force of the water flow in the second chamber 1044 to further improve the sealing performance of the valve.

[0044] Specifically, it also includes: a drain pipe 118 disposed on the sedimentation cup 116 ; and a one-way valve 120 disposed on the drain pipe 118 .

[0045] In this embodiment, a drain pipe 118 and a one-way valve 120 are also included. The drain pipe 118 is used to timely discharge the sewage inside the sedimentation cup 116 after it has been used for a long time, thereby ensuring the cleanliness of the sedimentation cup 116 and preventing the sewage from further corroding the piston cavity 1022 and the sedimentation cup 116. The one-way valve 120 is used to control the passage of water.

[0046] In this embodiment, the valve usage status is as follows:

[0047] like Figure 1 As shown, when there is water and in normal use: manually press the piston rod 1102, the water-blocking plug 1106 moves down, and the first chamber 1042 is no longer in a sealed state, and the water flows into the first chamber 1042, the second chamber 1044 and the piston chamber 1022. The piston assembly 110 is driven by the water flow in the first chamber 1042, the second chamber 1044 and the piston chamber 1022, and is in a state of constant movement. At this time, the water flows normally into the valve and flows out of the valve. For example, the current household water supply pressure is mostly 0.07MPa, so in normal use, the pressure in the first chamber 1042 and the second chamber 1044 is 0.07MPa, and the pressure in the piston chamber 1022 is also 0.07MPa, but due to the existence of the pressure relief hole 1024, the gas and liquid in the piston chamber 1022 will push the piston assembly 110 downward, and finally the piston assembly 110 reaches a balanced state.

[0048] like Figure 2 As shown, when the water supply is cut off, the piston rod 1102 receives the expansion force of the spring 1124, which drives the piston rod 1102 to rise. At this time, the water-blocking seal 1106 rises synchronously to seal the first chamber 1042; the movable plug 1104 rises synchronously to seal the pressure inlet hole 1026, and the valve as a whole is in a sealed state.

[0049] like Figure 2 As shown, after the water supply is cut off and the water supply is restored, since the valve is still in the sealed state when the water supply is cut off, the water flows into the second chamber 1044 and cannot smoothly enter the first chamber 1042, and since the pressure inlet hole 1026 is in the blocked state, the water flow cannot smoothly enter the piston chamber 1022, thus achieving the water shut-off process. In addition, the water flow in the second chamber 1044 also provides an upward driving force to the water shut-off plug 1106, so that the sealing performance of the water shut-off plug 1106 to the first chamber 1042 is improved.

[0050] like Figure 1 As shown, when the water supply is restored after the water supply is cut off and the user needs water, the piston rod 1102 is pressed downwards. At this time, the valve is in the above-mentioned state of having water and being in normal use.

[0051] like Figure 3 As shown, the second embodiment of the present invention proposes a water supply system, including a water inlet system 202; an automatic water shut-off valve 204 as in any of the above embodiments, the water inlet of the automatic water shut-off valve 204 is connected to the water inlet system 202; and a water outlet system 206 is connected to the water outlet of the automatic water shut-off valve 204.

[0052] The water supply system provided in this embodiment includes a water inlet system 202, a water stop automatic closing valve 204 as in any of the above embodiments, and a water outlet system 206. The water inlet system 202 can be a main water supply pipeline, i.e., a water inlet pipeline, used to provide water supply to users. The water stop automatic closing valve 204 has all the beneficial effects of the above technical solutions, which will not be repeated here. The water outlet system 206 can be a water outlet pipeline, used to transport water flow.

[0053] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water cut-off automatic closing valve, characterized in that: include: An upper valve body (102), wherein a piston cavity (1022) is provided in the upper valve body (102), and the piston cavity (1022) is provided with a pressure discharge hole (1024) and a pressure inlet hole (1026); A lower valve body (104) is arranged on the upper valve body (102), and a first chamber (1042) and a second chamber (1044) are arranged in the lower valve body (104); A precipitation cup (116), connected to the pressure inlet hole (1026) and the second chamber (1044), respectively; a water inlet (106), arranged on the lower valve body (104) and connected to the second chamber (1044); a water outlet (108), arranged on the lower valve body (104) and connected to the first chamber (1042); A piston assembly (110) extending through the piston cavity (1022) and through the first chamber (1042) to the second chamber (1044); A spring assembly (112) is screwed to the piston assembly (110) and is disposed on the upper valve body (102).

2. The water cut-off automatic closing valve according to claim 1, characterized in that: The first chamber (1042) is surrounded by an L-shaped plate, and the L-shaped plate has an opening.

3. The water cut-off automatic closing valve according to claim 2, characterized in that: The piston assembly (110) comprises: A piston rod (1102) passes through the piston cavity (1022) and passes through the first chamber (1042) to extend into the second chamber (1044); A movable plug (1104) is disposed on the piston rod (1102) and is located in the piston chamber (1022); A water-tight seal (1106) disposed on the piston rod (1102) and located in the second chamber (1044); Wherein, the length of the water-tight seal (1106) is greater than the opening of the opening on the L-shaped plate.

4. The water cut-off automatic closing valve according to claim 3 is characterized in that: Also includes: The water-tight rubber pad (114) is arranged on the water-tight seal (1106).

5. The water cut-off automatic closing valve according to claim 4, characterized in that: The spring assembly (112) comprises: A pressure nut (1122) is screwed to the piston rod (1102); A spring (1124) is connected to the pressure nut (1122) and the upper valve body (102) respectively.

6. The water cut-off automatic closing valve according to claim 1, characterized in that: Also includes: A drainage pipe (118), arranged on the sedimentation cup (116); A one-way valve (120) is arranged on the drainage pipe (118).

7. A water supply system, characterized in that: include: Water inlet system (202); The water-stop automatic shut-off valve (204) according to any one of claims 1 to 6, wherein the water inlet of the water-stop automatic shut-off valve (204) is connected to the water inlet system (202); The water outlet system (206) is connected to the water outlet of the water stop automatic closing valve (204).

8. The water supply system according to claim 7, characterized in that: The water inlet system (202) is a water inlet pipeline; The water outlet system (206) is a water outlet pipeline.

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