Safety valves for water supply pipelines, water supply pipelines, methods for reducing pressure in water supply pipelines, and their applications.

Abstract

This invention provides a safety valve for a water supply pipeline, a water supply pipeline, a method for reducing pressure in a water supply pipeline, and its application. The safety valve for the water supply pipeline includes a valve body and a housing, with the housing slidably fitted onto the surface of the valve body. The valve body includes an inlet end and an outlet end, and an internal cavity is formed within the valve body. The cavity includes a first cavity, within which a piston body, a first driving member, and a first cavity base are sequentially housed along the direction from the inlet end to the outlet end of the valve body. A first magnet is placed inside the piston body for synchronous movement with the piston body. The housing is provided with a second magnet and a positioning channel. The positioning channel is formed on the outer wall of the housing facing the inner wall, and the second magnet is accommodated within the positioning channel. The second magnet and the first magnet are magnetically attracted to each other. This design can release excess pressure in the water supply pipeline, preventing damage to pipeline components caused by water hammer, and also preventing pipeline components from freezing and being damaged in low-temperature environments, thus extending the service life of the pipeline components.

Description

Technical Field

[0001] This invention relates to the field of water supply pipeline safety technology, and more specifically, to a water supply pipeline safety valve, a water supply pipeline, a method for reducing pressure in a water supply pipeline, and its application. Background Technology

[0002] During the water delivery process in household water supply systems, sudden changes in flow velocity and significant pressure fluctuations can occur due to factors such as the sudden opening or closing of water supply pipe components (e.g., valves, water heaters, water purifiers, smart toilets), sudden pump stops, or abrupt opening and closing of guide vanes. The inertia of the pressurized water flow generates water shock waves, similar to a hammer blow; this phenomenon is known as the water hammer effect. The water hammer effect can easily reduce the lifespan of pipes and pipe components, and in severe cases, can cause pipe bursts, damaging end-user water components, appliances, and piping equipment such as water heaters and smart toilet purifiers. Furthermore, in northern my country, outdoor faucets and water components frequently burst due to freezing, causing water shortages and property damage for residents.

[0003] In view of this, the present invention is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a safety valve for a water supply pipeline, a water supply pipeline, a method for reducing pressure in a water supply pipeline, and its application. It can release excess pressure in the water supply pipeline, avoid damage to pipeline components caused by water hammer effect, and prevent pipeline components from freezing and being damaged in low-temperature environments, thereby extending the service life of the pipeline components.

[0005] The embodiments of the present invention are implemented as follows:

[0006] In a first aspect, the present invention provides a safety valve for a water supply pipeline, comprising a valve body and a housing, wherein the housing is slidably fitted onto the surface of the valve body.

[0007] The valve body includes an inlet end and an outlet end, and a cavity is formed inside the valve body. The cavity includes a first cavity, and a piston body, a first driving member and a first cavity base are sequentially housed in the first cavity along the direction from the inlet end to the outlet end of the valve body. A first magnet is placed inside the piston body for synchronous movement with the piston body.

[0008] The outer shell is provided with a second magnet and a positioning channel. The positioning channel is opened on the outer wall of the outer shell facing the inner wall. The second magnet is accommodated in the positioning channel and magnetically attracted to the first magnet.

[0009] Taking household water supply pipelines as an example, the maximum working pressure of domestic household water-related equipment and appliances is generally set at 0.7 MPa. Simultaneously, the maximum pressure of secondary water supply systems in Chinese cities is also generally controlled at 0.7 MPa. When water-related equipment and appliances in the water supply pipeline are quickly opened and closed, a water hammer effect will occur inside the pipeline. The instantaneous pressure of the water hammer will be far greater than the maximum working pressure set for household water-related equipment and appliances. Simultaneously, the pressure in some areas of the internal pipeline will also be far greater than the tap water inlet pressure, and in some cases, far greater than the maximum design pressure of the pipeline itself. This can lead to damage or malfunction of water-related equipment and appliances, affecting normal water use for users. Over time, this will shorten the lifespan of pipeline components, water-related equipment, and appliances. Through long-term research, the inventors designed a safety valve for water supply pipelines. By installing the safety valve on the water supply pipeline, excess pressure in the pipeline enters through the inlet end of the safety valve, pushing the piston body towards the outlet end. This, in turn, drives the first driving component to move, compressing the space of the first cavity, thereby achieving the effect of releasing pressure in the water supply pipeline. Meanwhile, because a first magnet is placed inside the piston body and a second magnet is placed in the positioning channel on the outer wall of the outer casing, the second magnet and the first magnet are magnetically attracted to each other. By observing the position of the second magnet, the position of the piston body inside the valve body can be obtained, thus allowing a direct understanding of the current pressure value in the water supply pipeline. This safety valve has a reasonable structural design, is simple and convenient to install, and has a pressure visualization function. Maintenance and replacement operations are simple. It can protect water-using components from water hammer damage in household pipelines and protect pipeline components from damage in low-temperature environments.

[0010] It is understandable that in order for the water supply pipeline safety valve to work smoothly, the first driving component has a first preset pressure. The first preset pressure is a range value, and its minimum value should be greater than the maximum pressure that the water supply pipeline can withstand. Therefore, only when the water supply pipeline safety valve is installed on the water supply pipeline can the pressure in the water supply pipeline be released from the water supply pipeline safety valve.

[0011] The water supply pipeline safety valve provided by this invention can be applied to domestic water supply pipelines, as well as industrial water supply pipelines, as long as the minimum value of the first preset pressure of the first driving component of the water supply pipeline safety valve provided by this invention is greater than the maximum pressure that the water supply pipeline can withstand.

[0012] In an optional embodiment, the first driving member includes either a first exhaust type driving member or a first compression type driving member, and when the first driving member is selected as the first exhaust type driving member, the first cavity base is provided with a first air outlet.

[0013] Preferably, the first air outlet is located in the middle of the first cavity base.

[0014] Preferably, the first exhaust type drive member includes either an elastic member or a magnetic member with opposite repulsion; the first compression type drive member includes an inert gas pre-filled in the first cavity.

[0015] The magnitude of the first preset pressure that the first driving component can provide is related to the selection of the first driving component. When a larger first preset pressure is required, the first driving component can be selected as an elastic component with greater elasticity, a magnet with stronger magnetic force, or a component pre-filled with more inert gas in the first cavity to achieve the first preset pressure. When a relatively smaller first preset pressure is required, the first driving component can be selected as an elastic component with less elasticity, a magnet with relatively weaker magnetic force that repels opposite charges, or a component pre-filled with relatively less inert gas in the first cavity to achieve the first preset pressure.

[0016] The specific value of the first preset pressure is related to the maximum pressure that water-related equipment and electrical appliances in the pipeline can withstand. For example, the maximum working pressure of household water-related equipment and electrical appliances is generally 0.7MPa, and the maximum pressure of secondary water supply in domestic cities is also generally controlled at 0.7MPa. Therefore, the minimum value of the first preset pressure must be greater than or equal to 0.8MPa.

[0017] When the pressure in the pipeline is below 0.7 MPa, the water supply pipeline safety valve provided by this invention does not operate; when the pipeline pressure is greater than 0.7 MPa, the water supply pipeline safety valve operates. Since the structure of the water supply pipeline safety valve has a nominal value in practical applications, the minimum value of the first preset pressure can be set to ≥0.8 MPa. In an optional embodiment, the outlet end of the valve body is provided with an internal thread, and the first cavity base is provided with an external thread. The first cavity base and the outlet end of the valve body are threadedly connected to form a first cavity space.

[0018] In some implementations, the safety valve for the water supply line includes the following two operating modes:

[0019] 1) When the first driving component is a first exhaust type driving component, a first air outlet is provided on the first cavity base, and the first cavity base is threadedly connected to the outlet end of the valve body. When the water supply pipeline safety valve is installed on the water supply pipeline, excess pressure in the water supply pipeline enters from the inlet end, pushing the piston body to move the first exhaust type driving component towards the outlet end, compressing the space in the first cavity, and the excess gas is discharged from the first air outlet. The first magnet inside the piston body moves synchronously with the piston body, and the first magnet drives the second magnet to move within the positioning channel to obtain the pressure in the water supply pipeline.

[0020] As the pressure in the water supply pipeline gradually decreases, the first exhaust-type drive component has the force to return to its initial state, thereby driving the piston body to move towards the inlet end and releasing the space in the first cavity. When the pressure in the water supply pipeline is less than the minimum value of the first preset pressure, the piston body contacts the sealing gasket, and the water supply pipeline safety valve stops working.

[0021] 2) When the first driving component is a first compression type driving component, the first cavity base has a closed structure, inert gas is pre-filled in the first cavity, and the first cavity base is threadedly connected to the outlet end of the valve body. When the water supply pipeline safety valve is installed on the water supply pipeline, excess pressure in the water supply pipeline enters from the inlet end, pushing the piston body to move towards the outlet end, compressing the inert gas, and simultaneously compressing the space in the first cavity. The first magnet inside the piston body moves synchronously with the piston body, and the first magnet drives the second magnet to move within the positioning channel to obtain the pressure in the water supply pipeline.

[0022] As the pressure in the water supply pipeline gradually decreases, the first compression-type drive component has the force to return to its initial state, thereby driving the piston body to move towards the inlet end and releasing the space in the first cavity. When the pressure in the water supply pipeline is less than the minimum value of the first preset pressure, the piston body contacts the sealing gasket, and the water supply pipeline safety valve stops working.

[0023] In most cases, the pressure in a household water supply pipe can be completely released through the first cavity. However, when the pressure in the water supply pipe is high and exceeds the first preset maximum pressure value in the first cavity, the first cavity cannot completely release the pressure that already exists in the water supply pipe. Therefore, the inventors continue to propose the following solution.

[0024] In an optional embodiment, the cavity further includes a second cavity located between the first cavity base and the outlet end of the valve body. The second cavity includes a second drive member and a second cavity base, with the second drive member disposed between the first cavity base and the second cavity base. The first preset pressure maximum value provided by the first drive member is less than the second preset pressure minimum value provided by the second drive member.

[0025] It should be noted that the maximum value of the first preset pressure can be set according to actual needs. For example, taking the secondary water supply system of domestic urban tap water as an example, when the pressure of domestic household water supply pipelines is more than 1.5 times the design pressure, according to national standards, the maximum design working pressure of domestic pipeline components is 1.6 MPa (nominal pressure PN16), and its sealing test pressure is 1.5 times the nominal pressure, which is 2.4 MPa. The above content refers to section 4.7.1.1 of GB / T13927-2008 Industrial Valve Pressure Test. Therefore, taking the secondary water supply system in Chinese cities as an example, the maximum operating pressure of household water-related equipment and appliances is generally 0.7 MPa, and the maximum pressure of the secondary water supply system in Chinese cities is also generally controlled at 0.7 MPa. Thus, the minimum value of the first preset pressure should be greater than or equal to 0.7 MPa, for example, 0.8–2.4 MPa. The minimum value of the second preset pressure should be greater than 2.4 MPa, for example, 2.4–6.4 MPa, where 6.4 MPa is four times the nominal pressure of the water supply pipeline. Therefore, when the pressure in the household water supply pipeline is less than 0.8 MPa, the safety valve of the water supply pipeline does not operate; when the pressure in the household water supply pipeline exceeds 0.8 MPa but is less than 2.4 MPa, the first actuator operates, releasing the excess pressure in the water supply pipeline; when the pressure in the household water supply pipeline exceeds 2.4 MPa, both the first and second actuators operate, releasing the excess pressure in the water supply pipeline. The above data are examples for ease of understanding only. The specific values ​​of the first and second preset pressures can be set according to the actual situation.

[0026] It is understandable that when the pressure in the water supply pipe is high, the space of the first cavity is compressed first. After the space of the first cavity is completely compressed, the space of the second cavity is further compressed to complete the release of pressure in the water supply pipe.

[0027] It should be noted that, in order to ensure that the water supply pipeline safety valve can compress the first cavity first and then the second cavity, the base of the first cavity inside the water supply pipeline safety valve is configured to be slidably fixed to the inner wall of the valve body.

[0028] Preferably, the first cavity base is configured to be slidably fixed to the inner wall of the valve body by providing a first positioning member inside the valve body. The first positioning member includes making the diameter of the first cavity slightly smaller than the diameter of the second cavity, or positioning the first cavity base by providing an elastic positioning member at a corresponding position in the valve body.

[0029] In an optional embodiment, the second driving member includes either a second exhaust type driving member or a second compression type driving member, and when the second driving member is selected as the second exhaust type driving member, the second cavity base is provided with a second air outlet.

[0030] Preferably, the second air outlet is located in the middle of the second cavity base.

[0031] Preferably, the second exhaust type drive includes either an elastic element or a magnetic element with opposite repulsion; the second compression type drive includes an inert gas pre-filled in the second cavity.

[0032] It is understandable that the selection range of the second exhaust type drive component is the same as that of the first exhaust type drive component, but this does not mean that the specific structure of the first exhaust type drive component and the second exhaust type drive component is the same. For example, when the first exhaust type drive component is an elastic component, the second exhaust type drive component can be selected from either an elastic component or a magnetic component with opposite repulsion.

[0033] In an optional embodiment, when the second drive is selected as a second compression type drive, the first cavity base is configured to be selectively fixed to the inner wall surface of the valve body. When the second drive is selected as a second exhaust type drive, the first cavity base is fixed to the inner wall surface of the valve body.

[0034] In an optional embodiment, the outlet end of the valve body is provided with an internal thread, and the second cavity base is provided with an external thread, and the second cavity base is threadedly connected to the outlet end of the valve body.

[0035] Preferably, the internal thread at the outlet end of the valve body can both fix the first cavity or the second cavity, and adjust the size of the first cavity or the second cavity in the valve body, as well as adjust the first preset pressure or the second preset pressure when the first driving member and the second driving member are compression type driving members.

[0036] Preferably, the valve body outlet end is also provided with a base fastener mounting position. The base fastener mounting position is located on the side of the valve body internal thread near the outlet end. The base fastener is installed on the base fastener mounting position to fix the first cavity base or the second cavity base, so that it cannot be removed from the internal thread structure of the valve body outlet end, thereby avoiding the water supply pipeline safety valve from failing due to misoperation during adjustment and maintenance, which would cause pipeline leakage.

[0037] In some implementations, the water supply pipeline safety valve also includes the following four operating modes:

[0038] 1) When the first driving member is a first exhaust type driving member, a first air outlet is provided on the first cavity base, and the first cavity base is fixed between the first cavity and the second cavity. The second driving member is a second exhaust type driving member, a second air outlet is provided on the second cavity base, and the second cavity base is threadedly connected to the outlet end of the valve body.

[0039] When the safety valve is installed on the water supply pipeline, excess pressure in the pipeline enters from the inlet, pushing the piston body to move the first exhaust-type drive component towards the outlet, compressing the space within the first cavity, and expelling excess gas from the first outlet. Once the space within the first cavity is completely compressed, the first cavity disengages from the positioning action of the first positioning component, pushing the second exhaust-type drive component towards the outlet, compressing the space within the second cavity, and expelling excess gas from the second outlet. The first magnet inside the piston body moves synchronously with the piston body, and the first magnet drives the second magnet to move within the positioning channel to obtain pressure within the water supply pipeline.

[0040] As the pressure in the water supply pipeline gradually decreases, the second exhaust-type drive component has the force to return to its initial state, thus moving towards the inlet end and releasing the space within the second cavity. When the pressure in the water supply pipeline is less than the second preset pressure, the space within the second cavity is completely released, and the first cavity is fixed by the first positioning component. At this time, the first exhaust-type drive component has the force to return to its initial state, thus driving the piston body to move towards the inlet end and releasing the space within the first cavity. When the pressure in the water supply pipeline is less than the first preset minimum pressure value, the piston body contacts the sealing gasket, and the water supply pipeline safety valve stops operating.

[0041] 2) When the first driving member is a first exhaust type driving member, a first air outlet is provided on the first cavity base, and the first cavity base is fixed between the first cavity and the second cavity. The second driving member is a second compression type driving member, the second cavity base is a closed structure, inert gas is pre-filled in the second cavity, and the second cavity base is threadedly connected to the outlet end of the valve body.

[0042] When the safety valve is installed on the water supply pipeline, excess pressure in the pipeline enters from the inlet, pushing the piston body to move the first exhaust-type drive component towards the outlet, compressing the space within the first cavity, and the excess gas is discharged from the first outlet. Once the space within the first cavity is completely compressed, the first cavity disengages from the positioning action of the first positioning component, pushing the second compression-type drive component towards the outlet, compressing the space within the second cavity. The first magnet inside the piston body moves synchronously with the piston body, and the first magnet drives the second magnet to move within the positioning channel to obtain pressure within the water supply pipeline.

[0043] As the pressure in the water supply pipeline gradually decreases, the second compression-type drive component has a force to return to its initial state, thus moving towards the inlet end and releasing the space within the second cavity. When the pressure in the water supply pipeline is less than the second preset pressure, the space within the second cavity is completely released, and the first cavity is fixed by the first positioning component. At this time, the first exhaust-type drive component has a force to return to its initial state, thus driving the piston body to move towards the inlet end and releasing the space within the first cavity. When the pressure in the water supply pipeline is less than the first preset minimum pressure value, the piston body contacts the sealing gasket, and the water supply pipeline safety valve stops operating.

[0044] 3) When the first driving component is a first compression type driving component, the first cavity base has a closed structure, and inert gas is pre-filled in the first cavity. The second driving component is a second exhaust type driving component, and the second cavity base is provided with a second air outlet, and the second cavity base is threadedly connected to the outlet end of the valve body. When the water supply pipeline safety valve is installed on the water supply pipeline, excess pressure in the water supply pipeline enters from the inlet end, pushing the piston body to move towards the outlet end, compressing the inert gas, and simultaneously compressing the space in the first cavity. When the compressed pressure in the first cavity exceeds the first preset pressure maximum value, the first cavity base disengages from the positioning function of the first positioning component, pushing the second exhaust type driving component to move towards the outlet end of the valve body, and the gas is discharged from the second air outlet, simultaneously compressing the space in the second cavity. The first magnet inside the piston body moves synchronously with the piston body, and the first magnet drives the second magnet to move within the positioning channel to obtain the pressure in the water supply pipeline.

[0045] As the pressure in the water supply pipeline gradually decreases, the second exhaust-type drive component has the force to return to its initial state, thus moving towards the inlet end and releasing the space within the second cavity. Simultaneously, it moves the first cavity base towards the inlet end. When the pressure in the water supply pipeline is less than the second preset pressure, the space within the second cavity is completely released, the first cavity base is fixed to the first positioning component, and the first compression-type drive component has the force to return to its initial state, thus moving the piston body towards the inlet end and releasing the space within the first cavity. When the pressure in the water supply pipeline is less than the first preset minimum pressure, the piston body contacts the sealing gasket, and the water supply pipeline safety valve ceases operation.

[0046] 4) When the first driving component is a first compression type driving component, the first cavity base has a closed structure, and inert gas is pre-filled in the first cavity. The second driving component is a second compression type driving component, the second cavity base has a closed structure, inert gas is pre-filled in the second cavity, and the second cavity base is threadedly connected to the outlet end of the valve body. When the water supply pipeline safety valve is installed on the water supply pipeline, excess pressure in the water supply pipeline enters from the inlet end, pushing the piston body to move towards the outlet end, compressing the inert gas, and simultaneously compressing the space in the first cavity. When the compressed pressure in the first cavity exceeds the first preset maximum pressure, the first cavity base disengages from the positioning action of the first positioning component and moves towards the outlet end of the valve body, compressing the space in the second cavity until the pressure in the water supply pipeline is released. The first magnet inside the piston body moves synchronously with the piston body, and the first magnet drives the second magnet to move within the positioning channel to obtain the pressure in the water supply pipeline.

[0047] As the pressure in the water supply pipeline gradually decreases, the second compression-type drive component has the force to return to its initial state, thus moving towards the inlet end and releasing the space within the second cavity. Simultaneously, it moves the first cavity base towards the inlet end. When the pressure in the water supply pipeline is less than the second preset pressure, the space within the second cavity is completely released, the first cavity base is fixed to the first positioning component, and the first compression-type drive component has the force to return to its initial state, thus moving the piston body towards the inlet end and releasing the space within the first cavity. When the pressure in the water supply pipeline is less than the first preset minimum pressure, the piston body contacts the sealing gasket, and the water supply pipeline safety valve operation ends.

[0048] By setting up a safety valve for the water supply pipeline with a first cavity and a second cavity, the high pressure in the water supply pipeline can be released, which plays a role in the linear buffer release under high pressure, ensuring that the safety valve of the water supply pipeline is not damaged under high pressure, and playing a dual safety protection role.

[0049] In an optional embodiment, a sealing gasket is also included, which is disposed at the end of the piston body near the inlet. This ensures that the water supply pipeline safety valve provides a seal when it is not in operation, and also acts as a buffer when the piston body returns to the valve body inlet after the water supply pipeline safety valve has finished operating, preventing the piston body from impacting the valve body and causing breakage or excessive noise.

[0050] Preferably, the surface of the piston body that contacts the inner wall of the valve body is further provided with a groove, and the sealing ring is accommodated in the groove.

[0051] More preferably, there are two grooves, and the two sealing rings are respectively accommodated in the two grooves. When the piston body moves along the axis of the safety valve of the water supply pipeline, it can make tight contact with the inner wall of the valve body to form a seal, ensuring that water in the water supply pipeline cannot enter the first cavity and avoid water leakage in the water supply pipeline.

[0052] Preferably, the valve body has a filter screen mounting groove at its inlet end, and a first limiting member is provided in the direction away from the inlet end of the filter screen mounting groove. The end of the first limiting member away from the filter screen mounting groove is a cavity of the valve body. The sealing filter screen is installed in the filter screen mounting groove and is spaced apart from the sealing gasket in the first cavity by the first limiting member. The sealing filter screen can filter out large particulate impurities in the water entering the safety valve of the water supply pipeline.

[0053] It is understood that the water supply pipeline safety valve proposed in this invention is not a structure that requires water to pass through. Only after the water supply pipeline safety valve is installed, a very small portion of the water flow will enter the water supply pipeline safety valve. However, due to the preset pressure inside the water supply pipeline safety valve, the water flow cannot enter the water supply pipeline safety valve.

[0054] Preferably, in order to prevent the sealed filter screen from falling off, the valve body is also provided with a filter screen fastener mounting position in the direction of the filter screen mounting groove near the inlet end. The filter screen fastener is installed in the filter screen fastener mounting position and is used to hold the sealed filter screen in place.

[0055] Preferably, the outer wall of the valve body has an external port, a sealing groove, a second limiting member, and a second positioning member arranged sequentially along the direction of the outlet end at the inlet end, and all of the above structures are located on one side of the inlet end of the valve body.

[0056] The external port is used to connect to the water supply pipe. Preferably, the external port has a threaded structure. In other embodiments, the external port may also be a straight pipe structure.

[0057] The sealing groove contains a sealing ring to provide a seal when the water supply pipeline is connected to the water supply pipeline safety valve.

[0058] The second limiting component can limit the water supply pipeline on one hand, and the outer casing on the other. Simultaneously, when the outer casing is fitted onto the valve body surface, it is fixed by the second positioning component. Preferably, the second positioning component is a retaining groove rib.

[0059] In an optional embodiment, the housing includes an open end and a closed end. The open end of the housing is provided with a groove so that when the housing is fitted onto the surface of the valve body, the groove cooperates with the second positioning member to fix it, thereby improving the stability of the connection between the housing and the valve body.

[0060] Preferably, the outer shell is transparent and has a vent hole for discharging gas discharged when the safety valve is in operation.

[0061] Preferably, the outer casing is also provided with mounting holes for installing a silencing device or a drying device. When the safety valve is in operation, the silencing device can eliminate or reduce the noise generated by the internal drive components, and the drying device can absorb the condensate flowing out of the safety valve.

[0062] Preferably, both the vent and the fixing hole are located at the closed end of the outer casing.

[0063] Preferably, the outer casing is also provided with a pressure scale mark, and the positioning channel is opened between the inner and outer walls of the outer casing, with the pressure scale mark corresponding to the positioning channel. When the second magnet moves within the positioning channel, the pressure value in the current water supply pipeline is obtained from the pressure scale mark according to the position of the second magnet, realizing the visualization of the safety valve function of the water supply pipeline and improving the user experience.

[0064] The pressure scale markings can be set to numerical labels, that is, the pressure at the corresponding position is calculated according to the valve body diameter, and then the corresponding pressure values ​​are marked on the outer shell at intervals, such as 0.8MPa, 1.6MPa, 2.4MPa and 3.2MPa, etc. The setting basis can refer to GB / T13927-2008, Industrial Valves, Pressure Testing.

[0065] Secondly, the present invention provides a water supply pipeline, including a water supply pipeline safety valve as described in any of the foregoing embodiments, wherein the water supply pipeline safety valve is connected to the water supply pipeline and is used to release pressure in the water supply pipeline.

[0066] Thirdly, the present invention provides a method for reducing pressure in a water supply pipeline, applicable to a water supply pipeline safety valve as described in any of the foregoing embodiments, comprising connecting the inlet end of the water supply pipeline safety valve to the water supply pipeline, and when the pressure in the water supply pipeline is greater than the maximum water supply pressure, pushing the piston body toward the outlet end of the valve body, thereby driving the first driving member to move and compressing the first cavity space.

[0067] In an optional implementation, when the pressure in the water supply pipeline is greater than the first preset pressure maximum value of the first cavity, the first cavity space is completely compressed, and the second driving member moves toward the outlet end of the valve body to compress the second cavity space.

[0068] Fourthly, the present invention provides the application of a water supply pipeline safety valve as described in any of the foregoing embodiments or a water supply pipeline pressure reduction method as described in the foregoing embodiments in the field of water supply pipeline safety technology.

[0069] The beneficial effects of the embodiments of the present invention are:

[0070] A safety valve for water supply pipelines, a method for reducing pressure in water supply pipelines, and its application are disclosed. By installing the safety valve on the water supply pipeline, when the actual pressure in the pipeline exceeds the maximum pressure the pipeline can withstand (for example, the maximum pressure in secondary water supply systems in Chinese cities is generally below 0.8 MPa), the pressure in the pipeline enters through the inlet of the safety valve, pushing the piston body towards the outlet. This, in turn, drives the first driving component to move, compressing the space of the first cavity, thereby achieving the effect of releasing pressure in the water supply pipeline. Simultaneously, because the piston body contains a first magnet, and the positioning channel on the outer wall of the outer shell contains a second magnet, the second magnet and the first magnet are magnetically attracted to each other. By observing the position of the second magnet, the position of the piston body inside the valve body can be obtained, thus providing a direct understanding of the current pressure value in the water supply pipeline. This safety valve has a reasonable structural design, is simple and convenient to install, and has a pressure visualization function. Maintenance and replacement operations are simple. It can protect water-using components from water hammer damage in household pipelines and protect pipeline components from damage in low-temperature environments. Attached Figure Description

[0071] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0072] Figure 1 This is an exploded view of the internal structure of the safety valve for water supply pipeline provided in the first embodiment of the present invention;

[0073] Figure 2 A cross-sectional view of the valve body structure of a water supply pipeline safety valve provided in an embodiment of the present invention;

[0074] Figure 3 This is a cross-sectional view of the outer shell structure of the safety valve for water supply pipeline provided in an embodiment of the present invention;

[0075] Figure 4 This is a schematic diagram of the structure of a water supply pipeline safety valve provided in an embodiment of the present invention;

[0076] Figure 5 This is an exploded view of the internal structure of the safety valve for water supply pipeline provided in the third embodiment of the present invention;

[0077] Figure 6 A schematic diagram of the working process of the first cavity of the water supply pipeline safety valve provided in the third embodiment of the present invention;

[0078] Figure 7 This is a schematic diagram of the working process of the first cavity and the second cavity of the water supply pipeline safety valve provided in the third embodiment of the present invention.

[0079] Icons: 100-Safety valve for water supply pipeline; 200-Valve body; 201-External port; 202-Sealing groove; 203-Second limiting component; 204-Second positioning component; 205-Sealing ring; 206-First limiting component; 207-Internal thread; 208-Base fastener mounting position; 209-Base fastener; 210-Filter screen mounting groove; 211-Filter screen fastener mounting position; 212-Sealed filter screen; 213-Filter screen fastener; 221-Sealing gasket; 222-Piston body; 223-First driving component; 224-First cavity base; 225-First magnet; 231-Second driving component; 232-Second cavity base; 300-Outer shell; 301-Groove; 302-Positioning channel; 303-Second magnet; 304-Pressure scale marking; 305-Fixing hole; 306-Vent hole. Detailed Implementation

[0080] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0081] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0082] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0083] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0084] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0085] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0086] First Embodiment

[0087] Please refer to Figure 1 This embodiment provides a water supply pipeline safety valve 100, which includes a valve body 200 and a housing 300, with the housing 300 slidably fitted onto the surface of the valve body 200.

[0088] like Figure 2 As shown, the valve body 200 includes an inlet end and an outlet end. The outer wall surface of the inlet end of the valve body 200 is sequentially provided with an external port 201, a sealing groove 202, a second limiting member 203, and a second positioning member 204 along the direction from the inlet end to the outlet end. When the outer shell 300 is fitted onto the surface of the valve body 200, it can be positioned at one end of the second limiting member 203 by the second positioning member 204. When the water supply pipeline safety valve 100 is connected to the water supply pipeline, the water supply pipeline safety valve 100 is connected to the water supply pipeline safety valve 100 through the external port 201 and positioned at the other end of the second limiting member 203. The sealing groove 202 contains a sealing ring 205 to provide a seal when the water supply pipeline is connected to the water supply pipeline safety valve 100.

[0089] In this embodiment, the external port 201 has an external thread structure to facilitate connection with the water supply pipeline.

[0090] Furthermore, a cavity is formed inside the valve body 200, and a first limiting member 206 is provided in the cavity at a position corresponding to the second limiting member 203. The cavity includes a first cavity, in which a sealing gasket 221, a piston body 222, a first driving member 223, and a first cavity base 224 are sequentially housed along the direction from the inlet end to the outlet end of the valve body 200.

[0091] The sealing gasket 221 contacts the first limiting member 206, which can not only ensure that the water supply pipeline safety valve 100 plays a sealing role when it is not working, but also play a buffering role when the piston body 222 returns to the inlet end of the valve body 200 after the water supply pipeline safety valve 100 has finished working, so as to avoid the piston body 222 impacting the valve body 200, causing cracking or excessive noise.

[0092] The piston body 222 has grooves on its surface that contacts the inner wall of the valve body 200. Two sealing rings 205 are housed within these grooves, respectively. When the piston body 222 moves along the axis of the water supply pipeline safety valve 100, it forms a tight seal with the inner wall of the valve body 200, preventing water from entering the first cavity and thus avoiding leakage. A first magnet 225 is placed inside the piston body 222 for synchronous movement with it.

[0093] The first driving component 223 is a first exhaust type driving component, specifically a spring. The first cavity base 224 is provided with a first air outlet. In this embodiment, the first air outlet is located in the middle of the first cavity base 224.

[0094] The outlet end of the valve body 200 is provided with an internal thread 207, and the first cavity base 224 is provided with an external thread. The first cavity base 224 is threadedly connected to the outlet end of the valve body 200 to form the space of the first cavity.

[0095] The valve body 200 outlet end is also provided with a base fastener mounting position 208. The base fastener mounting position 208 is located on the side of the valve body 200 internal thread 207 near the outlet end. The base fastener 209 is installed on the base fastener mounting position 208 to fix the first cavity base 224, so that it cannot be removed from the internal thread 207 structure at the outlet end of the valve body 200, thus avoiding the water supply pipeline safety valve 100 from failing due to misoperation during adjustment and maintenance, which could cause pipeline leakage.

[0096] Inside the cavity, at the end of the first limiting member 206 away from the sealing gasket 221, along the direction from the inlet end to the outlet end, there is a filter screen fastener mounting position 211 and a filter screen mounting groove 210. The filter screen fastener 213 is installed in the filter screen fastener mounting position 211, and the sealed filter screen 212 is installed in the filter screen mounting groove 210. The filter screen fastener 213 can clamp the sealed filter screen 212, so that the sealed filter screen 212 is spaced apart from the sealing gasket 221 in the first cavity through the first limiting member 206.

[0097] Furthermore, the outer casing 300 is entirely transparent, comprising an open end and a closed end. The open end of the outer casing 300 is provided with a groove 301, so that when the outer casing 300 is fitted onto the surface of the valve body 200, the groove 301 engages with the second positioning member 204 for fixation, improving the stability of the connection between the outer casing 300 and the valve body 200. In this embodiment, the second positioning member 204 is a rib of the groove 301.

[0098] like Figure 3 and Figure 4 As shown, a positioning channel 302 is also provided between the inner and outer walls of the outer casing 300. A second magnet 303 is placed in the positioning channel 302. The second magnet 303 is magnetically attracted to the first magnet 225 in the piston body 222 inside the valve body 200 so that the position of the piston body 222 can be visualized.

[0099] The outer wall of the housing 300 is also provided with a pressure scale mark 304, which is correspondingly set with the positioning channel 302. When the second magnet 303 moves in the positioning channel 302, the pressure value in the current water supply pipeline is obtained from the pressure scale mark 304 according to the position of the second magnet 303, realizing the visualization of the function of the water supply pipeline safety valve 100 and improving the user experience.

[0100] The housing 300 also has a mounting hole 305 and a vent hole 306. The mounting hole 305 is used to install a silencer or a drying device. When the safety valve is working, the silencer can eliminate or reduce the noise generated by the internal drive components, and the drying device can absorb the condensate flowing out of the safety valve. The vent hole 306 can discharge the gas to be discharged when the safety valve is working, and both the vent hole 306 and the mounting hole 305 are located at the closed end of the housing 300.

[0101] The working principle of the water supply pipeline safety valve 100 provided in this embodiment is as follows:

[0102] The water supply pipeline safety valve 100 provided in this embodiment is installed on the household water supply pipeline. The household water supply pipeline is connected to the water supply pipeline safety valve 100 through the external port 201. The sealing ring 205 is located between the household water supply pipeline and the second limiting member 203 to seal the household water supply pipeline and the water supply pipeline safety valve 100, so as to prevent water from entering the water supply pipeline safety valve 100.

[0103] The maximum pressure that a household water supply pipeline can withstand is less than 0.8 MPa, and the first preset pressure that the first driving component 223 can provide is 0.8 to 2.4 MPa.

[0104] When the actual pressure in the household water supply line is 2.0 MPa, the excess pressure in the water supply line enters from the inlet end of the valve body 200, pushing the piston body 222 to move the first exhaust type drive component towards the outlet end, compressing the space in the first cavity, and the excess gas is discharged from the first outlet. The first magnet 225 inside the piston body 222 moves synchronously with the piston body 222, and the first magnet 225 drives the second magnet 303 to move within the positioning channel 302, and the pressure in the water supply line is read from the pressure scale mark 304 as 2.0 MPa.

[0105] As the pressure in the water supply pipeline is gradually released, the internal pressure gradually decreases, and the first exhaust type drive component has the force to return to its initial state, thereby driving the piston body 222 to move towards the inlet end, releasing the space in the first cavity. When the pressure in the water supply pipeline is less than 0.8MPa, the piston body 222 contacts the sealing gasket 221, and the space in the first cavity is completely released.

[0106] Second Embodiment

[0107] This embodiment provides a water supply pipeline safety valve 100, which has a structure similar to that of the first embodiment. The only difference is that the first driving member 223 is a first compression type driving member. That is, in the water supply pipeline safety valve 100 provided in this embodiment, the first cavity is pre-filled with inert gas, the first cavity base 224 is threadedly connected to the outlet end of the valve body 200, and the first cavity base 224 does not have a first air outlet.

[0108] The working principle of the water supply pipeline safety valve 100 provided in this embodiment is as follows:

[0109] The water supply pipeline safety valve 100 provided in this embodiment is installed on the household water supply pipeline. The household water supply pipeline is connected to the water supply pipeline safety valve 100 through the external port 201. The sealing ring 205 is located between the household water supply pipeline and the second limiting member 203 to seal the household water supply pipeline and the water supply pipeline safety valve 100, so as to prevent water from entering the water supply pipeline safety valve 100.

[0110] The maximum pressure that a household water supply pipeline can withstand is less than 0.8 MPa, and the first preset pressure that the first driving component 223 can provide is 0.8 to 2.4 MPa.

[0111] When the actual pressure in the household water supply line is 2.0 MPa, the excess pressure in the water supply line enters from the inlet end of the valve body 200, pushing the piston body 222 towards the outlet end, compressing the inert gas in the first cavity, and simultaneously compressing the space within the first cavity. The first magnet 225 inside the piston body 222 moves synchronously with the piston body 222, and the first magnet 225 drives the second magnet 303 to move within the positioning channel 302, and the pressure reading from the pressure scale mark 304 indicates that the current pressure in the water supply line is 2.0 MPa.

[0112] As the pressure in the water supply pipeline is gradually released, the internal pressure gradually decreases. The first compression-type drive component has the force to return to its initial state, thereby driving the piston body 222 to move towards the inlet end, releasing the space in the first cavity. When the pressure in the water supply pipeline is less than 0.8 MPa, the piston body 222 contacts the sealing gasket 221, and the space in the first cavity is completely released.

[0113] Third Embodiment

[0114] like Figure 5 As shown, this embodiment provides a water supply pipeline safety valve 100, which includes a valve body 200 and a housing 300, with the housing 300 slidably fitted onto the surface of the valve body 200.

[0115] like Figure 2 As shown, the valve body 200 includes an inlet end and an outlet end. The outer wall surface of the inlet end of the valve body 200 is sequentially provided with an external port 201, a sealing groove 202, a second limiting member 203, and a second positioning member 204 along the direction from the inlet end to the outlet end. When the outer casing 300 is fitted onto the surface of the valve body 200, it can be positioned at one end of the second limiting member 203 by the second positioning member 204. When the water supply pipeline safety valve 100 is connected to the water supply pipeline, the water supply pipeline is connected to the water supply pipeline safety valve 100 through the external port 201 and positioned at the other end of the second limiting member 203. The sealing groove 202 contains a sealing ring 205 to provide a seal when the water supply pipeline is connected to the water supply pipeline safety valve 100.

[0116] In this embodiment, the external port 201 has an external thread structure to facilitate connection with the water supply pipeline.

[0117] Furthermore, a cavity is formed inside the valve body 200, and a first limiting member 206 is disposed in the cavity at a position corresponding to the second limiting member 203. The cavity includes a first cavity and a second cavity. The first cavity contains, in sequence, a sealing gasket 221, a piston body 222, a first driving member 223, and a first cavity base 224 along the direction from the inlet end to the outlet end of the valve body 200.

[0118] The sealing gasket 221 contacts the first limiting member 206, which can not only ensure that the water supply pipeline safety valve 100 plays a sealing role when it is not working, but also play a buffering role when the piston body 222 returns to the inlet end of the valve body 200 after the water supply pipeline safety valve 100 has finished working, so as to avoid the piston body 222 impacting the valve body 200, causing cracking or excessive noise.

[0119] The piston body 222 has grooves on its surface that contacts the inner wall of the valve body 200. Two sealing rings 205 are housed within these grooves, respectively. When the piston body 222 moves along the axis of the water supply pipeline safety valve 100, it forms a tight seal with the inner wall of the valve body 200, preventing water from entering the first cavity and thus avoiding leakage. A first magnet 225 is placed inside the piston body 222 for synchronous movement with it.

[0120] The first driving member 223 is a first compression type driving member. That is, in the water supply pipeline safety valve 100 provided in this embodiment, the first cavity is pre-filled with inert gas, the first cavity base 224 does not have a first air outlet, the first cavity base 224 can be selectively fixed to the inner wall of the valve body 200 by the first positioning member, and the first cavity base 224 and the sealing gasket 221 form a first cavity.

[0121] The second cavity is located between the first cavity base 224 and the outlet end of the valve body 200. The second cavity includes a second drive member 231 and a second cavity base 232. The second drive member 231 is disposed between the first cavity base 224 and the second cavity base 232. The maximum value of the first preset pressure provided by the first drive member 223 is less than the minimum value of the second preset pressure provided by the second drive member 231.

[0122] The second driving member 231 is a second exhaust type driving member, specifically a spring. The second cavity base 232 is provided with a second air outlet. In this embodiment, the second air outlet is located in the middle of the second cavity base 232.

[0123] The outlet end of the valve body 200 is provided with an internal thread 207, and the second cavity base 232 is provided with an external thread. The second cavity base 232 is threadedly connected to the outlet end of the valve body 200 to form the space of the second cavity.

[0124] The valve body 200 outlet end is also provided with a base fastener mounting position 208. The base fastener mounting position 208 is located on the side of the valve body 200 internal thread 207 near the outlet end. The base fastener 209 is installed on the base fastener mounting position 208 to fix the second cavity base 232, so that it cannot be removed from the internal thread 207 structure at the outlet end of the valve body 200, thus avoiding the water supply pipeline safety valve 100 from being misoperated during adjustment and maintenance, causing the safety valve to fail and resulting in pipeline leakage.

[0125] Inside the cavity, at the end of the first limiting member 206 away from the sealing gasket 221, along the direction from the inlet end to the outlet end, there is a filter screen fastener mounting position 211 and a filter screen mounting groove 210. The filter screen fastener 213 is installed in the filter screen fastener mounting position 211, and the sealed filter screen 212 is installed in the filter screen mounting groove 210. The filter screen fastener 213 can clamp the sealed filter screen 212, so that the sealed filter screen 212 is spaced apart from the sealing gasket 221 in the first cavity through the first limiting member 206.

[0126] Furthermore, the outer casing 300 is entirely transparent, comprising an open end and a closed end. The open end of the outer casing 300 is provided with a groove 301, so that when the outer casing 300 is fitted onto the surface of the valve body 200, the groove 301 engages with the second positioning member 204 for fixation, improving the stability of the connection between the outer casing 300 and the valve body 200. In this embodiment, the second positioning member 204 is a rib of the groove 301.

[0127] A positioning channel 302 is also provided between the inner and outer walls of the outer casing 300. A second magnet 303 is placed in the positioning channel 302. The second magnet 303 is magnetically attracted to the first magnet 225 in the piston body 222 inside the valve body 200 so that the position of the piston body 222 is visible.

[0128] like Figure 3 As shown, the outer wall of the housing 300 is also provided with a pressure scale mark 304, which is correspondingly set with the positioning channel 302. When the second magnet 303 moves in the positioning channel 302, the pressure value in the current water supply pipeline is obtained from the pressure scale mark 304 according to the position of the second magnet 303, realizing the visualization of the function of the water supply pipeline safety valve 100 and improving the user experience.

[0129] The housing 300 also has a mounting hole 305 and a vent hole 306. The mounting hole 305 is used to install a silencer or a drying device. When the safety valve is working, the silencer can eliminate or reduce the noise generated by the internal drive components, and the drying device can absorb the condensate flowing out of the safety valve. The vent hole 306 can discharge the gas to be discharged when the safety valve is working, and both the vent hole 306 and the mounting hole 305 are located at the closed end of the housing 300.

[0130] The working principle of the water supply pipeline safety valve 100 provided in this embodiment is as follows:

[0131] The water supply pipeline safety valve 100 provided in this embodiment is installed on the household water supply pipeline. The household water supply pipeline is connected to the water supply pipeline safety valve 100 through the external port 201. The sealing ring 205 is located between the household water supply pipeline and the second limiting member 203 to seal the household water supply pipeline and the water supply pipeline safety valve 100, so as to prevent water from entering the water supply pipeline safety valve 100.

[0132] The maximum pressure that a household water supply pipe can withstand is less than 0.8 MPa. The first preset pressure that the first driving component 223 can provide is 0.8 to 2.4 MPa, and the second preset pressure that the second driving component 231 can provide is 2.4 to 6.4 MPa.

[0133] like Figure 6 As shown, when the actual pressure in the household water supply pipeline is 3.0 MPa, the excess pressure in the water supply pipeline enters from the inlet end of the valve body 200, pushing the piston body 222 to move towards the outlet end, compressing the inert gas in the first cavity, and simultaneously compressing the space within the first cavity. Figure 7 As shown, when the pressure in the first cavity exceeds 2.4 MPa, the first cavity base 224 disengages from the positioning function of the first positioning member. The piston body 222 and the first cavity base 224 jointly push the second exhaust type drive member towards the outlet end of the valve body 200, and the gas is discharged from the second outlet, while compressing the space in the second cavity. The first magnet 225 inside the piston body 222 moves synchronously with the piston body 222, and the first magnet 225 drives the second magnet 303 to move in the positioning channel 302, and the pressure in the water supply pipeline is currently read as 3.0 MPa from the pressure scale mark 304.

[0134] As the pressure in the water supply pipeline gradually decreases, the internal pressure gradually diminishes. The second exhaust-type drive component has a force to return to its initial state, thereby driving the piston body 222 to move towards the inlet end, releasing the space within the second cavity. When the pressure in the water supply pipeline is less than 2.4 MPa, the space within the second cavity is completely released, and the first cavity base 224 is fixed at the first positioning component, beginning to release the space within the first cavity. The first compression-type drive component has a force to return to its initial state, thereby driving the piston body 222 to move towards the inlet end, releasing the space within the first cavity. When the pressure in the water supply pipeline is less than 0.8 MPa, the piston body 222 contacts the sealing gasket 221, and the space within the first cavity is completely released.

[0135] Fourth embodiment

[0136] This embodiment provides a water supply pipeline safety valve 100, whose structure is similar to that of the third embodiment. The only difference is that the second driving member 231 is a second compression type driving member. That is, in the water supply pipeline safety valve 100 provided in this embodiment, the second cavity is also pre-filled with inert gas. The second cavity base 232 is threadedly connected to the outlet end of the valve body 200, and the second cavity base 232 does not have a first air outlet.

[0137] The working principle of the water supply pipeline safety valve 100 provided in this embodiment is as follows:

[0138] The water supply pipeline safety valve 100 provided in this embodiment is installed on the household water supply pipeline. The household water supply pipeline is connected to the water supply pipeline safety valve 100 through the external port 201. The sealing ring 205 is located between the household water supply pipeline and the second limiting member 203 to seal the household water supply pipeline and the water supply pipeline safety valve 100, so as to prevent water from entering the water supply pipeline safety valve 100.

[0139] The maximum pressure that a household water supply pipe can withstand is less than 0.8 MPa. The first preset pressure that the first driving component 223 can provide is 0.8 to 2.4 MPa, and the second preset pressure that the second driving component 231 can provide is 2.4 to 6.4 MPa.

[0140] When the actual pressure in the household water supply line is 3.5 MPa, the excess pressure in the water supply line enters from the inlet end of the valve body 200, pushing the piston body 222 towards the outlet end, compressing the inert gas in the first cavity, and simultaneously compressing the space within the first cavity. When the compressed pressure in the first cavity exceeds 2.4 MPa, the first cavity base 224 disengages from the positioning function of the first positioning element, and the piston body 222 and the first cavity base 224 move towards the outlet end of the valve body 200, compressing the inert gas, and simultaneously compressing the space within the second cavity. The first magnet 225 inside the piston body 222 moves synchronously with the piston body 222, and the first magnet 225 drives the second magnet 303 to move within the positioning channel 302, and the pressure reading from the pressure scale mark 304 indicates that the current pressure in the water supply line is 3.5 MPa.

[0141] As the pressure in the water supply pipeline gradually decreases, the internal pressure gradually diminishes. The second exhaust-type drive component has a force to return to its initial state, thereby driving the piston body 222 to move towards the inlet end, releasing the space within the second cavity. When the pressure in the water supply pipeline is less than 2.4 MPa, the space within the second cavity is completely released, and the first cavity base 224 is fixed at the first positioning component, beginning to release the space within the first cavity. The first compression-type drive component has a force to return to its initial state, thereby driving the piston body 222 to move towards the inlet end, releasing the space within the first cavity. When the pressure in the water supply pipeline is less than 0.8 MPa, the piston body 222 contacts the sealing gasket 221, and the space within the first cavity is completely released.

[0142] Fifth embodiment

[0143] This embodiment provides a water supply pipeline safety valve 100, which has a structure similar to that of the third embodiment. The only difference is that the first driving member 223 is a first exhaust type driving member, specifically a spring, and the first cavity base 224 is provided with a first air outlet. In this embodiment, the first air outlet is located in the middle of the first cavity base 224.

[0144] The working principle of the water supply pipeline safety valve 100 provided in this embodiment is as follows:

[0145] The water supply pipeline safety valve 100 provided in this embodiment is installed on the household water supply pipeline. The household water supply pipeline is connected to the water supply pipeline safety valve 100 through the external port 201. The sealing ring 205 is located between the household water supply pipeline and the second limiting member 203 to seal the household water supply pipeline and the water supply pipeline safety valve 100, so as to prevent water from entering the water supply pipeline safety valve 100.

[0146] The maximum pressure that a household water supply pipe can withstand is less than 0.8 MPa. The first preset pressure that the first driving component 223 can provide is 0.8 to 2.4 MPa, and the second preset pressure that the second driving component 231 can provide is 2.4 to 6.4 MPa.

[0147] When the actual pressure in the household water supply line is 4.0 MPa, excess pressure enters from the inlet of valve body 200, pushing piston body 222 to move. Piston body 222 drives the first exhaust type drive member to move towards the outlet, compressing the space in the first cavity, and the gas is discharged from the first outlet. When the compressed pressure in the first cavity exceeds 2.4 MPa, the first cavity disengages from the positioning function of the first positioning member, pushing the second exhaust type drive member to move towards the outlet, compressing the space in the second cavity. The first magnet 225 inside piston body 222 moves synchronously with piston body 222, and the first magnet 225 drives the second magnet 303 to move within positioning channel 302, and the pressure scale mark 304 indicates that the current pressure in the water supply line is 4.0 MPa.

[0148] As the pressure in the water supply pipeline gradually decreases, the internal pressure gradually diminishes. The second exhaust-type drive component has a force to return to its initial state, thereby driving the piston body 222 to move towards the inlet end, releasing the space within the second cavity. When the pressure in the water supply pipeline is less than 2.4 MPa, the space within the second cavity is completely released, and the first cavity is fixed by the first positioning component. At this time, the first exhaust-type drive component has a force to return to its initial state, thereby driving the piston body 222 to move towards the inlet end, releasing the space within the first cavity. When the pressure in the water supply pipeline is less than 0.8 MPa, the piston body 222 contacts the sealing gasket 221, and the space within the first cavity is completely released.

[0149] Sixth Embodiment

[0150] This embodiment provides a water supply pipeline safety valve 100, whose structure is similar to that of the fourth embodiment, except that the first driving member 223 is a first venting type driving member, specifically a spring, and a first air outlet is provided on the first cavity base 224. In this embodiment, the first air outlet is located in the middle of the first cavity base 224. The first cavity base 224 is fixed to the inner wall of the valve body 200, and a first cavity is formed between the first cavity base 224 and the sealing gasket 221.

[0151] The working principle of the water supply pipeline safety valve 100 provided in this embodiment is as follows:

[0152] The water supply pipeline safety valve 100 provided in this embodiment is installed on the household water supply pipeline. The household water supply pipeline is connected to the water supply pipeline safety valve 100 through the external port 201. The sealing ring 205 is located between the household water supply pipeline and the second limiting member 203 to seal the household water supply pipeline and the water supply pipeline safety valve 100, so as to prevent water from entering the water supply pipeline safety valve 100.

[0153] The maximum pressure that a household water supply pipe can withstand is less than 0.8 MPa. The first preset pressure that the first driving component 223 can provide is 0.8 to 2.4 MPa, and the second preset pressure that the second driving component 231 can provide is 2.4 to 6.4 MPa.

[0154] When the actual pressure in the household water supply line is 3.0 MPa, excess pressure enters from the inlet of valve body 200, pushing piston body 222 to move. Piston body 222 drives the first exhaust type drive component to move towards the outlet, compressing the space in the first cavity, and the gas is discharged from the first outlet. When the compressed pressure in the first cavity exceeds 2.4 MPa, the first cavity disengages from the positioning function of the first positioning component, pushing the second exhaust type drive component to move towards the outlet, compressing the space in the second cavity. The first magnet 225 inside piston body 222 moves synchronously with piston body 222, and the first magnet 225 drives the second magnet 303 to move within positioning channel 302, and the pressure reading from pressure scale mark 304 indicates that the current pressure in the water supply line is 3.0 MPa.

[0155] As the pressure in the water supply pipeline gradually decreases, the internal pressure gradually diminishes. The second compression-type drive component has a force to return to its initial state, thereby driving the piston body 222 to move towards the inlet end, releasing the space within the second cavity. When the pressure in the water supply pipeline is less than 2.4 MPa, the space within the second cavity is completely released, and the first cavity is fixed by the first positioning component. At this time, the first exhaust-type drive component has a force to return to its initial state, thereby driving the piston body 222 to move towards the inlet end, releasing the space within the first cavity. When the pressure in the water supply pipeline is less than 0.8 MPa, the piston body 222 contacts the sealing gasket 221, and the space within the first cavity is completely released.

[0156] The present invention provides a safety valve for a water supply pipeline, a water supply pipeline, a method for reducing pressure in a water supply pipeline, and an application thereof, which have at least the following advantages:

[0157] 1) By installing the safety valve on the water supply pipeline, excess pressure in the pipeline enters through the inlet of the safety valve, pushing the piston 222 towards the outlet, which in turn drives the first driving element 223 to move, compressing the space of the first cavity, thereby achieving the effect of releasing pressure in the water supply pipeline. Simultaneously, since the piston 222 contains a first magnet 225, and the positioning channel 302 on the outer wall of the outer casing 300 contains a second magnet 303, the second magnet 303 and the first magnet 225 are magnetically attracted to each other. By observing the position of the second magnet 303, the position of the piston 222 inside the valve body 200 can be obtained, thus providing a direct understanding of the current pressure value in the water supply pipeline. This safety valve has a reasonable structural design, is simple and convenient to install, and has a pressure visualization function. Maintenance and replacement are simple, protecting water-using components from water hammer damage in household pipelines and protecting pipeline components from damage in low-temperature environments.

[0158] 2) When the pressure in the water supply pipeline is high, the space of the first cavity is compressed first. After the space of the first cavity is completely compressed, the space of the second cavity is further compressed to complete the pressure release in the water supply pipeline. By setting up a water supply pipeline safety valve 100 with a first cavity and a second cavity, the high pressure in the water supply pipeline can be released, playing a curved linear buffer release role under high pressure, ensuring that the water supply pipeline safety valve 100 is not damaged under high pressure, and playing a dual safety protection role.

[0159] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A water line safety valve characterized by, The valve body and the shell are provided, and the shell is slidably sleeved on the surface of the valve body; The valve body comprises an inlet end and an outlet end, and a cavity is formed in the valve body, the cavity comprises a first cavity, and the first cavity sequentially contains a piston body, a first driving element and a first cavity base in the direction from the inlet end to the outlet end of the valve body, the piston body contains a first magnet for synchronous movement with the piston body; The shell is provided with a second magnet and a positioning channel, the outer wall of the shell is provided with the positioning channel in the direction of the inner wall, and the second magnet is contained in the positioning channel, and the second magnet is magnetically attracted to the first magnet; The cavity further comprises a second cavity, the second cavity is located between the first cavity base and the outlet end of the valve body, the second cavity comprises a second driving element and a second cavity base, and the second driving element is arranged between the first cavity base and the second cavity base; the first preset pressure maximum value provided by the first driving element is less than the second preset pressure minimum value provided by the second driving element; The first driving element comprises any one of a first exhaust type driving element or a first compression type driving element; when the first driving element selects the first exhaust type driving element, the first cavity base is provided with a first air outlet; when the first driving element selects the first compression type driving element, the first cavity base is not provided with an air outlet; The first cavity base is configured to be positioned on the inner wall surface of the valve body by a first positioning element, and can be separated from the inner wall surface when the pressure provided by the first driving element exceeds the first preset pressure maximum value; The second driving element comprises any one of a second exhaust type driving element or a second compression type driving element, the second cavity base is provided with a second air outlet when the second driving element selects the second exhaust type driving element; and the second cavity base is not provided with an air outlet when the second driving element selects the second compression type driving element.

2. The water service line safety valve of claim 1, wherein The first exhaust type driving element comprises any one of an elastic element or a magnetic element with different repulsion; the first compression type driving element comprises a pre-filled inert gas in the first cavity.

3. The water service line safety valve of claim 2, wherein, The outlet end of the valve body is provided with an internal thread, the first cavity base is provided with an external thread, and the first cavity base is threadedly connected with the outlet end of the valve body.

4. The water service line safety valve of claim 1, wherein The outlet end of the valve body is provided with an internal thread, the second cavity base is provided with an external thread, and the second cavity base is threadedly connected with the outlet end of the valve body.

5. A water line safety valve according to any one of claims 1 to 4, characterized in that A sealing gasket is further provided, and the sealing gasket is arranged at one end of the piston body close to the inlet end; The surface of the piston body in contact with the inner wall surface of the valve body is further provided with a groove, and a sealing ring is contained in the groove; The inlet end of the valve body is further provided with a sealing filter screen, and the sealing filter screen is spaced apart from the sealing gasket in the direction away from the inlet end.

6. A water service safety valve according to any one of claims 1 to 4, wherein The shell is further provided with a pressure scale mark, the positioning channel is arranged between the inner and outer walls of the shell, and the pressure scale mark is arranged corresponding to the positioning channel to read the position of the second magnet; The shell is a transparent shell, and the shell is further provided with a ventilation hole.

7. A water line, characterized by The water supply pipeline safety valve according to any one of claims 1-6 is connected with a water supply pipeline and is used to release pressure in the water supply pipeline.

8. A method of pressure reduction of a water supply line, characterized in that The water supply pipeline safety valve according to any one of claims 1-6 is connected with a water supply pipeline and is used to release pressure in the water supply pipeline.

9. The method of claim 8, wherein, When the pressure in the water supply pipeline is greater than the first preset pressure of the first cavity, the space of the first cavity is completely compressed, the second driving member moves towards the outlet end of the valve body, and the space of the second cavity is compressed.

10. Application of the water supply pipeline safety valve according to any one of claims 1-6 or the method for reducing pressure in a water supply pipeline according to claim 8 or 9 in the technical field of water supply pipeline safety.

Images