Self-closing valve

Abstract

The present application relates to a kind of self-closing valves, including shell, float and float reset assembly, water flow passage, float reset passage, water inlet pipe and water outlet pipe are arranged in shell, water flow passage and float reset passage are arranged side by side, float is placed in water flow passage or float reset passage, float can be moved into float reset passage after operating float reset assembly from water flow passage, after water stop, float falls into water flow passage from float reset passage by the reason of self-weight, after water stop, the water in float reset passage gradually goes back, float enters water flow passage from float reset passage by the reason of self-weight, after water supply is restored, float floats on the water surface of water flow passage and moves to the water outlet of water outlet pipe, then float seals the water outlet of water outlet pipe and completes self-closing state, to prevent waste of water resources due to forgetting to turn off faucet, and property damage caused by excessive water inflow into indoor and soaking.

Description

Technical Field

[0001] This invention belongs to the field of valve technology, and specifically relates to a self-closing valve. Background Technology

[0002] In daily life, water supply is sometimes interrupted due to reasons such as water company pipe repairs. During the water outage, people habitually turn on the tap to check if the water is on. In most cases, they will turn the tap off as well. However, there are also cases where people forget to turn off the tap after leaving home. When the water is restored, a large amount of water will be wasted. In some cases, the water may even overflow the sink and flow onto the floor, causing water damage to the floor and furniture placed on the floor. There may also be water leakage that damages the roof of the downstairs neighbor, resulting in huge losses.

[0003] In addition, the above-mentioned overflow phenomenon often occurs in some public places, such as hotels, public toilets, factories, research rooms, and schools. At best, it affects the cleanliness of the environment and the construction of civilization; at worst, it can damage property, equipment and other items, resulting in certain economic losses.

[0004] Application number 85202023, entitled "A Float-Type Overflow Controller and its Switch," describes a float-type overflow controller comprising a housing, a float, a resetter, and a top cover. (See reference...) Figure 1 In this invention, the float rises to its highest position in the cavity. When water is interrupted and then resumed, gas accumulates in this cavity. This accumulated gas exerts a downward force on the float, preventing it from rising to its highest position. Furthermore, the continuous impact of flowing water on the float can cause it to be pushed against the pipe opening, potentially blocking it and preventing normal water use. When water supply is interrupted, the float falls under its own weight, covering the pipe opening. When water supply is restored, airflow and water disturbances can sometimes cause the float to detach from the pipe opening. As water fills the pipe, the float floats, failing to prevent overflow when unattended. Sometimes, strong airflow and water can also force the float firmly into place at the pipe opening, making it difficult to remove by hand by pressing the top pin. In summary, this invention has the following drawbacks: 1. During normal water use, the water flow is not stable; 2. If the valve is forgotten and no one is present, the overflow prevention function cannot be guaranteed, and the float may be difficult to remove. Summary of the Invention

[0005] The main objective of this invention is to provide a self-closing valve with good anti-overflow effect and convenient opening.

[0006] A self-closing valve includes a housing, a float, and a float reset assembly. The housing contains a water flow channel, a float reset channel, an inlet pipe, and an outlet pipe. The water flow channel and the float reset channel are arranged side-by-side. The inlet pipe is installed at the lower end of the water flow channel, and the outlet pipe is installed at the upper end. The diameter of the float is larger than the diameters of the inlet and outlet pipes. The float is placed within the water flow channel or the float reset channel. The float reset assembly is installed on one side of the housing. Operating the float reset assembly allows the float to move from the water flow channel into the float reset channel. After water supply is stopped, the float rolls out of the float reset channel due to its own weight and enters the water flow channel.

[0007] Preferably, a partition is provided between the water flow channel and the float reset channel. The partition is provided with a first float passage and a second float passage at a preset distance from top to bottom. The first float passage is located near the outlet of the water outlet pipe. The bottom of the float reset channel is an inclined surface. The float can roll along the inclined surface at the bottom of the float reset channel through the second float passage and enter the water flow channel. The float reset assembly is installed on one side of the water flow channel. By operating the float reset assembly, the float is pushed to move from the outlet of the water outlet pipe through the first float passage and into the float reset channel.

[0008] Preferably, a blocking elastic element is installed at the first float passage. The blocking elastic element is used to prevent the float from passing through the first float passage due to the impact of water. The operation of the float reset assembly pushes the float to squeeze the blocking elastic element. After the blocking elastic element is deformed, it is sufficient to allow the float to pass through the first float passage. After the float enters the float reset channel, it floats on the water surface contained in the float reset channel.

[0009] Preferably, a one-way rotating gate is installed inside the second float passage, and a stop is set on the partition. The stop is set inside the float reset channel and around the second float passage. The stop prevents the one-way rotating gate from rotating toward the float reset channel. The float rolls down the inclined surface inside the float reset channel to the one-way rotating gate. The float continues to roll and pushes the one-way rotating gate to rotate toward the water flow channel. After the one-way rotating gate rotates toward the water flow channel, the float falls from the second float passage into the water flow channel.

[0010] Preferably, the float reset assembly includes a mounting base, a push rod, a handle, a float contact part, and a reset spring. The mounting base is disposed on the water flow channel opposite the first float outlet. The float contact part is installed inside the water flow channel. The push rod is inserted into the mounting base and fixedly connected to the float contact part. A handle is installed at the other end of the push rod. A baffle is provided on the push rod. A reset spring is installed on the push rod. The reset spring is installed between the baffle and the bottom of the mounting base. By pushing the handle, the float contact part pushes the float, causing the float to move away from the outlet of the water supply pipe and then squeeze the blocking elastic element before entering the float reset channel from the first float outlet.

[0011] Preferably, the float reset assembly includes a reset tube and a reset operation part, which are fixedly connected. The reset tube is installed inside the housing. The reset tube includes a first pipe, a second pipe, and a connecting arm. The first pipe and the second pipe are arranged side by side and fixedly connected by the connecting arm. The first pipe, the second pipe, and the connecting arm form an I-shape. The end faces of the first pipe and the second pipe are attached to the end faces above the water flow channel and the float reset channel. The reset operation part includes a rotating shaft and a rotating handle. The rotating shaft and the connecting arm are vertically connected. A first through hole is provided at the top of the housing. The first pipe, the second pipe, and the connecting arm are placed inside the housing. The rotating shaft passes through the first through hole. The rotating handle is installed on the rotating shaft and located above the top of the housing. Rotating the rotating handle can drive the rotating shaft, the connecting arm, the first pipe, and the second pipe to rotate, so that the state in which the first pipe is connected to the water flow channel is changed to the state in which the first pipe is connected to the float reset channel, and simultaneously the state in which the second pipe is connected to the float reset channel is changed to the state in which the second pipe is connected to the water flow channel.

[0012] Preferably, a sealing assembly is installed in the first through hole of the outer casing. The sealing assembly includes a hollow fixing seat, a sealing cover, and a hollow sealing element. The hollow fixing seat is installed in the first through hole and has a second through hole and a hollow sealing element receiving cavity. The second through hole and the hollow sealing element receiving cavity are connected and the hollow sealing element receiving cavity is located above the second through hole. The hollow sealing element is installed on the rotating shaft and housed in the hollow sealing element receiving cavity. The shape and size of the hollow sealing element receiving cavity are adapted to the shape and size of the hollow sealing element. The sealing cover is installed at the upper end of the hollow fixing seat and has a third through hole for the rotating shaft to pass through. The diameters of the second through hole and the third through hole are equal. The rotating shaft passes through the second through hole and the third through hole. The hollow fixing seat, the sealing cover, the hollow sealing element, and the rotating shaft together form an effective seal.

[0013] In the aforementioned self-closing valve, under normal water supply conditions, the float is in the float reset channel. After a water outage, the water in the float reset channel gradually recedes, and the float, due to its own weight, enters the water flow channel from the float reset channel. After the water supply is restored, the float floats on the water surface in the water flow channel and moves to the outlet of the water pipe. The float then seals the outlet of the water pipe, completing the self-closing state. This prevents water waste caused by forgetting to turn off the tap and property damage caused by excessive water entering the room. When people return home, they operate the float reset component to move the float from the sealed self-closing state to the float reset channel. Since the float reset channel and the water flow channel are two adjacent channels, the float will not be impacted by the water flow and will not seal the outlet of the water pipe again when normal water supply is needed. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the self-closing valve according to the first embodiment of the present invention.

[0015] Figure 2 yes Figure 1 Front view.

[0016] Figure 3 yes Figure 1 Top view.

[0017] Figure 4 yes Figure 3 Sectional view at point AA.

[0018] Figure 5 yes Figure 1 A three-dimensional structural diagram of the inner shell.

[0019] Figure 6 This is a cross-sectional structural diagram under normal water flow conditions.

[0020] Figure 7 This is a cross-sectional structural diagram after the water supply was stopped.

[0021] Figure 8 This is a three-dimensional structural diagram of the self-closing valve according to the second embodiment of the present invention.

[0022] Figure 9 yes Figure 8 Top view.

[0023] Figure 10 yes Figure 9 Sectional view at point BB.

[0024] Figure 11 yes Figure 8 A cross-sectional view of the inner shell.

[0025] Figure 12 yes Figure 8 A cross-sectional view of the central sealing assembly.

[0026] Figure 13 This is a diagram showing the arrangement of two self-closing valves installed in an actual pipeline.

[0027] In the figure: self-closing valve 100, outer shell 10, water flow channel 11, partition 111, first float ball passage 112, second float ball passage 113, blocking elastic element 114, one-way rotating door 115, stop block 116, float ball reset channel 12, water inlet pipe 13, water outlet pipe 14, first through hole 15, float ball 20, float ball reset assembly 30, mounting base 31, push rod 32, baffle plate 321, handle 33, float ball contact part 34, reset spring 35, float ball reset assembly 40, reset tube 41, reset operation part 42, first pipe 411, second pipe 412, connecting arm 413, rotating shaft 421, rotating handle 422, sealing assembly 50, hollow fixed base 51, second through hole 511, hollow sealing element receiving cavity 512, sealing cover 52, third through hole 521, hollow sealing element 53. Detailed Implementation

[0028] The technical solutions and effects of the embodiments of the invention will be further described in detail below with reference to the accompanying drawings.

[0029] See Figures 1 to 7 In the first embodiment of the present invention, the self-closing valve 100 includes a housing 10, a float 20, and a float reset assembly 30. The float 20 is placed inside the housing 10, and the float reset assembly 30 is mounted on the housing 10. The housing 10 is provided with a water flow channel 11, a float reset channel 12, an inlet pipe 13, and an outlet pipe 14. The water flow channel 11 and the float reset channel 12 are arranged side by side. The inlet pipe 13 is installed at the lower end of the water flow channel 11, and the outlet pipe 14 is installed at the upper end of the water flow channel 11. The diameter of the float 20 is larger than the diameter of the inlet pipe 13 and the outlet pipe 14. A partition 111 is provided between the water flow channel 11 and the float reset channel 12. 1. A first float passage 112 and a second float passage 113 are set at a preset distance from top to bottom. The bottom of the float reset channel 12 is an inclined surface, and the inclined surface at the bottom of the float reset channel 12 is the lowest near the second float passage 113. The float 20 can roll along the inclined surface at the bottom of the float reset channel 12 through the second float passage 113. The float 20 is placed in the water flow channel 11 or the float reset channel 12. The float reset assembly 30 is installed on one side of the water flow channel. By operating the float reset assembly 30, the float 20 can move from the inlet of the outlet pipe 14 through the first float passage 112 and then enter the float reset channel 12.

[0030] See Figures 4 to 7 To prevent the float 20 from moving directly from the water flow channel 11 into the float reset channel 12 under the impact of the water flow, a blocking elastic element 114 is installed at the first float passage 112. The blocking elastic element 114 is used to intercept the float 20 from passing through the first float passage 112 due to the impact of the water. The float reset assembly 30 is operated to push the float 20 to squeeze the blocking elastic element 114. After the blocking elastic element 114 is deformed, it is enough to allow the float 20 to pass through the first float passage 112. After the float 20 enters the float reset channel 12, it floats on the water surface contained in the float reset channel 12.

[0031] See Figure 4 , Figure 6 and Figure 7To prevent the float 20 from entering the float reset channel 12 from the second float passage 113 due to the impact of the water flow after water supply, that is, to ensure that the float 20 floats along the water flow channel 11 to the outlet of the outlet pipe 14 after water supply, a one-way rotating door 115 is installed in the second float passage 113. A stop 116 is set on the partition 111 and is set in the float reset channel 12. The stop 116 is set around the second float passage 113. The stop 116 prevents the one-way rotating door 115 from rotating toward the float reset channel 12. The float 20 rolls down the inclined surface in the float reset channel 12 to the one-way rotating door 115. The float 20 continues to roll and pushes the one-way rotating door 115 to rotate toward the water flow channel 11. After the one-way rotating door 115 rotates toward the water flow channel 11, the float 20 falls from the second float passage 113 into the water flow channel 11.

[0032] See Figure 4 The float reset assembly 30 includes a mounting base 31, a push rod 32, a handle 33, a float contact part 34, and a reset spring 35. The mounting base 31 is disposed on the water flow channel 11 opposite the first float passage 112. The float contact part 34 is installed inside the water flow channel 11. The push rod 32 is inserted into the mounting base 31 and fixedly connected to the float contact part 34. The handle 33 is installed at the other end of the push rod 32. A baffle 321 is provided on the push rod 32. The reset spring 35 is installed on the push rod 32. 5 is installed between the bottom of the baffle 321 and the mounting base 31. By pushing the handle 33, the float contact part 34 pushes the float 20, causing the float 20 to move away from the outlet of the water supply pipe 14 and then squeeze the blocking elastic element 114 before entering the float reset channel 12 through the first float passage 112. After releasing the handle 33, the baffle 321 is pushed by the reset spring 35, causing the push rod 32 to move along the mounting base 31. The push rod 32 drives the float contact part 34 to abut against the inner wall of the water flow channel 11.

[0033] In use, the self-closing valve 100 is installed vertically on the main indoor water pipe, that is, with the inlet pipe 13 at the bottom and the outlet pipe 14 at the top, on the indoor water pipe. (See reference...) Figure 7 When the water supply is interrupted, the water in the float reset channel 12 gradually drains out, and the float 20 falls to the second float passage 113 due to its own weight. The float 20 then rolls through the second float passage 113 and falls onto the inlet pipe 13. (See reference...) Figure 4 After the water supply begins, it gradually fills the water flow channel 11. The float 20, along with the rising water level, floats to the outlet of the outlet pipe 14, sealing off the outlet and preventing overflow and water waste, or even damage to property due to water damage from immersion. (See also...) Figure 6When people return indoors and find there is no water when they turn on the tap, they can operate the float reset assembly 30 to push the float 20, so that the float 20 passes through the first float through port 112 and enters the float reset channel 12 and floats on the water surface contained in the float reset channel 12. The water flow channel 11 is in a flowing state. Since the float 20 is in the float reset channel 12, there is no unstable water supply caused by the interference of the float 20 during the water flow along the water flow channel 11.

[0034] See Figures 8 to 12 In a second embodiment of the present invention, the self-closing valve 100 includes a housing 10, a float 20, and a float reset assembly 40. The float 20 is placed inside the housing 10, and the float reset assembly 40 is mounted on the housing 10. The housing 10 is provided with a water flow channel 11, a float reset channel 12, an inlet pipe 13, and an outlet pipe 14. The water flow channel 11 and the float reset channel 12 are arranged side by side. The inlet pipe 13 is installed at the lower end of the water flow channel 11, and the outlet pipe 14 is installed at the upper end of the water flow channel 11. The diameter of the float 20 is larger than the diameter of the inlet pipe 13 and the outlet pipe 14. The float reset assembly 40 includes a reset pipe 41 and a reset operation part 42, which are fixedly connected. The reset pipe 41 includes a first pipe 411, a second pipe 412, and a connecting arm 413. The first pipe 411 and the second pipe 412 are arranged side by side and fixedly connected by the connecting arm 413. Forming an I-shape, the end faces of the first pipe 411 and the second pipe 412 are attached to the end faces above the water flow channel 11 and the float reset channel 12. The reset operation part 42 includes a rotating shaft 421 and a rotating handle 422. The rotating shaft 421 and the connecting arm 413 are vertically connected. A first through hole 15 is provided at the top of the housing 10. The first pipe 411, the second pipe 412 and the connecting arm 413 are placed inside the housing 10. The rotating shaft 421 passes through the first through hole 15. The rotating handle 422 is installed on the rotating shaft 421 and is located above the top of the housing 10. The rotation of the rotating handle 422 can drive the rotating shaft 421, the connecting arm 413, the first pipe 411 and the second pipe 412 to rotate, so that the state in which the first pipe 411 is connected to the water flow channel 11 is changed to the state in which the first pipe 411 is connected to the float reset channel 12. Simultaneously, the state in which the second pipe 412 is connected to the float reset channel 12 is changed to the state in which the second pipe 412 is connected to the water flow channel 11.

[0035] See Figure 8 , Figure 10 and Figure 12A sealing assembly 50 is installed in the first through hole 15 of the outer casing 10. The sealing assembly 50 includes a hollow fixing seat 51, a sealing cover 52, and a hollow sealing element 53. The hollow fixing seat 51 is installed in the first through hole 15 and has a second through hole 511 and a hollow sealing element receiving cavity 512. The second through hole 511 and the hollow sealing element receiving cavity 512 are connected. The hollow sealing element receiving cavity 512 is located above the second through hole 511. The hollow sealing element 53 is installed on the rotating shaft 421 and housed in the hollow sealing element receiving cavity 512. Inside 12, the shape and size of the hollow seal cavity 512 are adapted to the shape and size of the hollow seal 53. The sealing cover 52 is installed on the upper end of the hollow fixed seat 51. The sealing cover 52 is provided with a third through hole 521 for the rotating shaft 421 to pass through. The diameters of the second through hole 511 and the third through hole 521 are equal. The rotating shaft 421 passes through the second through hole 511 and the third through hole 521. The hollow fixed seat 51, the sealing cover 52, the hollow seal 53 and the rotating shaft 421 together form an effective seal to prevent water from leaking out along the rotating shaft 421.

[0036] See Figure 13 This refers to the case where two self-closing valves 100 are installed in the actual pipeline, one in the cold water pipeline and the other in the hot water pipeline. This ensures that the cold water pipeline is prevented from overflowing after a sudden water outage. It can also prevent water overflow incidents caused by human negligence in forgetting to close the hot water valve, loose hot water valve, or rupture of indoor heating pipes during winter heating, thus ensuring water safety in homes and offices.

Claims

1. A self-closing valve, characterized in that: The device includes a housing, a float, and a float reset assembly. The housing contains a water flow channel, a float reset channel, an inlet pipe, and an outlet pipe. The water flow channel and the float reset channel are arranged side-by-side. The inlet pipe is installed at the lower end of the water flow channel, and the outlet pipe is installed at the upper end. The diameter of the float is larger than the diameters of the inlet and outlet pipes. The float is placed within either the water flow channel or the float reset channel. The float reset assembly is installed on one side of the housing. Operating the float reset assembly moves the float from the water flow channel into the float reset channel. After water flow is interrupted, the float rolls out of the float reset channel due to its own weight and enters the water flow channel. A partition is installed between the water flow channel and the float reset channel. The partition has a first float port and a second float port spaced at preset distances from top to bottom. The first float port is located near the outlet of the outlet pipe. The bottom of the float reset channel is inclined, allowing the float to roll along the inclined surface and pass through the second float port into the water flow channel. The float reset assembly is installed on one side of the housing. Installed on one side of the water flow channel, the float reset assembly is operated to push the float, causing it to move from the outlet of the water pipe through the first float passage and into the float reset channel. A blocking elastic element is installed at the first float passage to prevent the float from passing through due to water impact. Operating the float reset assembly pushes the float to compress the blocking elastic element, causing it to deform sufficiently to allow the float to pass through the first float passage. Once inside the float reset channel, the float floats on the water surface contained within it. A one-way rotating gate is installed inside the second float passage. A stop is set on the partition, positioned within the float reset channel and around the second float passage. The stop prevents the one-way rotating gate from rotating towards the float reset channel. The float rolls down the inclined surface within the float reset channel to the one-way rotating gate. The continued rolling of the float pushes the one-way rotating gate to rotate towards the water flow channel, after which the float falls from the second float passage into the water flow channel.

2. The self-closing valve as described in claim 1, characterized in that: The float reset assembly includes a mounting base, a push rod, a handle, a float contact part, and a reset spring. The mounting base is located on the water flow channel opposite the first float outlet. The float contact part is installed inside the water flow channel. The push rod is inserted into the mounting base and fixedly connected to the float contact part. A handle is installed on the other end of the push rod. A baffle is installed on the push rod, and a reset spring is installed on the push rod. The reset spring is installed between the baffle and the bottom of the mounting base. By pushing the handle, the float contact part pushes the float, causing the float to move away from the outlet of the water supply pipe and then squeeze the blocking elastic element before entering the float reset channel from the first float outlet.

3. A self-closing valve, characterized in that: The device includes a housing, a float, and a float reset assembly. The housing contains a water flow channel, a float reset channel, an inlet pipe, and an outlet pipe. The water flow channel and the float reset channel are arranged side-by-side. The inlet pipe is installed at the lower end of the water flow channel, and the outlet pipe is installed at the upper end. The diameter of the float is larger than the diameters of the inlet and outlet pipes. The float is placed within either the water flow channel or the float reset channel. The float reset assembly is installed on one side of the housing. Operating the float reset assembly moves the float from the water flow channel into the float reset channel. After water supply is interrupted, the float rolls out of the float reset channel due to its own weight and enters the water flow channel. The float reset assembly includes a reset tube and a reset operating part, which are fixedly connected. The reset tube is installed inside the housing and includes a first pipe, a second pipe, and a connecting arm. A first pipe and a second pipe are arranged side by side and fixedly connected by a connecting arm. The first pipe, the second pipe, and the connecting arm form an I-shape. The end faces of the first pipe and the second pipe are attached to the end faces above the water flow channel and the float reset channel. The reset operation part includes a rotating shaft and a rotating handle. The rotating shaft and the connecting arm are vertically connected. A first through hole is provided at the top of the housing. The first pipe, the second pipe, and the connecting arm are placed inside the housing. The rotating shaft passes through the first through hole. The rotating handle is installed on the rotating shaft and located above the top of the housing. Rotating the rotating handle can drive the rotating shaft, the connecting arm, the first pipe, and the second pipe to rotate, so that the state in which the first pipe is connected to the water flow channel is changed to the state in which the first pipe is connected to the float reset channel. Simultaneously, the state in which the second pipe is connected to the float reset channel is changed to the state in which the second pipe is connected to the water flow channel.

4. The self-closing valve as described in claim 3, characterized in that: A sealing assembly is installed in the first through hole of the outer casing. The sealing assembly includes a hollow fixing seat, a sealing cover, and a hollow sealing element. The hollow fixing seat is installed in the first through hole and has a second through hole and a hollow sealing element receiving cavity. The second through hole and the hollow sealing element receiving cavity are connected and the hollow sealing element receiving cavity is located above the second through hole. The hollow sealing element is installed on the rotating shaft and housed in the hollow sealing element receiving cavity. The shape and size of the hollow sealing element receiving cavity are adapted to the shape and size of the hollow sealing element. The sealing cover is installed at the upper end of the hollow fixing seat and has a third through hole for the rotating shaft to pass through. The diameters of the second through hole and the third through hole are equal. The rotating shaft passes through the second through hole and the third through hole. The hollow fixing seat, the sealing cover, the hollow sealing element, and the rotating shaft together form an effective seal.

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