Mechanical automatic water cutoff device

Abstract

The application discloses a mechanical automatic water cutoff device, belonging to the technical field of water resource saving equipment, comprising a water inlet interface, a water outlet interface, a valve body, a mechanical trigger mechanism, a sealing water cutoff assembly and a reset adjusting mechanism; the water inlet interface and the water outlet interface are communicated with a water passage in the valve body; the mechanical trigger mechanism comprises a water flow impeller, a gear reducer and a limiting baffle; the water cutoff assembly comprises a water cutoff plug and a water cutoff plug guide pipe; and the reset adjusting mechanism is connected with the water cutoff plug and the outer side of the valve body. The device is driven by water flow power to drive the mechanical structure to operate, and when the water use reaches a preset time length, the sealing water cutoff assembly is automatically triggered to block the water source, without the need of power driving, and the device is simple in structure, high in stability and adaptability, can effectively avoid water resource waste caused by forgetting to turn off the water, is high in water saving efficiency, and is suitable for various water supply scenes such as family, public occasions and agricultural irrigation, solves the problems of dependence on power, frequent faults and high cost of the existing water saving device, and has good practical value and popularization prospect.

Description

Technical Field

[0001] This invention relates to the field of water conservation equipment technology, specifically to a mechanical automatic water shut-off device, which is particularly suitable for scenarios such as household water use, public water supply, and agricultural irrigation. It can automatically cut off the water supply when the water pipe bursts or breaks during water use, or when the tap is left running after use and the water loss reaches the device's limit, effectively avoiding water waste. Background Technology

[0002] Water is an indispensable resource for human survival and development. With the global water shortage becoming increasingly severe, water conservation has become a key focus of society. In daily water use scenarios, it's common to forget to turn off taps after use, leaving water supply equipment running continuously, such as in home washing, public restrooms, and farmland irrigation. A large amount of water is wasted because it's not shut off in time, exacerbating the water supply-demand imbalance. Furthermore, forgetting to turn off water valves at home, or water pipes and end valves bursting when no one is home, can cause flooding and damage to houses, resulting in unnecessary losses. Existing water-saving devices mostly use electronic induction or solenoid valve structures. While they have some water shut-off function, they have several drawbacks: first, they rely on electricity and cannot function properly after a power outage, limiting their applicability; second, their complex structure and precision components make them prone to malfunction due to water impurities and scale buildup, leading to high maintenance costs; third, their high cost hinders widespread adoption; and fourth, some devices do not respond promptly to water shut-off, still resulting in some water waste. Therefore, developing a mechanical automatic water shut-off device that is simple in structure, requires no electricity, provides precise water shut-off, is highly adaptable, and durable has become an urgent technical problem to be solved in the field of water conservation. The mechanical water shut-off device does not require electric drive and achieves automatic water shut-off through a purely mechanical structure. It is more stable, lower in cost, and has a longer service life, meeting the needs of efficient water conservation and long-term stable use. Summary of the Invention

[0003] Purpose of the invention: To address the shortcomings of existing technologies, the purpose of this invention is to provide a mechanical automatic water shut-off device that solves the problems of existing water-saving devices being power-dependent, having complex structures, frequent malfunctions, and poor water-saving effects. This device achieves pure mechanical water pressure drive and automatic, precise water shut-off, effectively reducing water waste and preventing water damage to rooms and houses, thus avoiding unnecessary losses for families. It also boasts advantages such as convenient installation, strong adaptability, long service life, and low cost, making it suitable for various water supply scenarios.

[0004] Technical solution: A mechanical automatic water shut-off device includes an inlet port, an outlet port, a valve body, a gear reducer, a water shut-off assembly, and a flow impeller mechanism; the outlet port and the inlet port are symmetrically arranged at the upper and lower ends of the valve body and communicate with the water passage cavity inside the valve body; the mechanical triggering mechanism, the sealing water shut-off assembly, and the reset adjustment mechanism are all installed inside the valve body, with the mechanical triggering mechanism located at the outlet end of the water passage cavity, the flow impeller device located at the outlet end of the water passage cavity, and the reset mechanism located at the outlet end of the water passage cavity.

[0005] The mechanical triggering mechanism includes a water impeller, pressure steel balls, a circular steel column water shut-off plug, and an upper limiting baffle. The water impeller is installed in the water passage cavity inside the water inlet via a rotating shaft, one end of which is connected to a counting device. The pressure steel balls and the circular steel column water shut-off plug are respectively installed in two guide pipes within the valve body. A rack is installed at the lower part of the circular steel column water shut-off plug, which is linked to a gear reducer. The top of the water shut-off plug is correspondingly positioned to the limiting baffle.

[0006] The reset adjustment mechanism includes a pressure steel ball, a circular steel column water cut-off plug, and a lower limiting baffle. The lower end of the circular steel column water cut-off plug is connected to a rack and gear reducer. The lower limiting baffle is located at the bottom of the guide pipe where it connects to the valve body, and is used to fix the position of the pressure steel ball and water cut-off plug after reset.

[0007] The gear reducer adopts a multi-stage reduction gear structure of finished gear set. The gear reduction ratio can be adjusted according to the inlet pipe diameter and water pressure, generally 10:1-15:1. The gear reduction ratio can be adjusted according to the water pressure requirements to achieve different delayed water cut-off functions.

[0008] The water impeller adopts an arc-shaped blade structure, and the blade surface is provided with anti-slip water flow grooves to ensure stable rotation of the impeller when impacted by water flow and to avoid idling.

[0009] The guide pipe containing the pressure steel ball is in the direction of the main water flow. There is a certain seepage gap between the water cut-off plug and the guide pipe. The weight of the pressure steel ball is slightly greater than the weight of the circular steel column water cut-off plug.

[0010] Both the inlet and outlet interfaces use standard threaded interfaces, which can be adapted to various pipe diameters such as household tap water pipes and public water supply pipes, and installation does not require modification of the original pipes.

[0011] The valve body is determined based on factors such as corrosion resistance, scale resistance, water head pressure, environmental protection and food safety regulations, and is adapted to water supply environments with different water qualities.

[0012] The pressure steel ball baffle is used to block the pressure steel ball after it rises to the top, allowing the water to flow normally through the bypass pipe. There are 3 baffles in total.

[0013] The water shut-off block is used to block the water shut-off plug after it rises to the top, leaving a certain gap between the water shut-off plug and the pipe, allowing a small amount of water to flow through the gap. There are 3 blocks in total. Working principle:

[0014] This invention relates to a mechanical automatic water shut-off device installed between the water supply pipeline and the water terminal (it is recommended to install it in front of the user's water meter). When water is supplied, the water flows into the valve body through the inlet, impacting the water flow impeller to rotate. The water flow impeller drives the flow counter to rotate through the transmission gear set. When water is used, the pressure steel ball in the guide pipe in the main flow direction is pushed vertically upward under the action of water pressure, and the circular steel column water shut-off plug is also pushed vertically upward under the action of water pressure. At the same time, the circular steel column water shut-off plug is also pushed vertically upward under the action of water pressure. Because the water shut-off plug rises quickly, a rack and pinion gear reducer is used to make it rise slowly. When it rises to the upper limit baffle (its water shut-off plug stroke and speed match the predetermined water flow), the water shut-off plug just blocks the outlet of the main flow pipe and blocks the outlet of the main flow bypass pipe, realizing automatic water shut-off (in order to maintain the water pressure in the valve body under the water shut-off state, a certain water flow gap is left between the water shut-off plug, the inner wall of the water shut-off plug guide tube, and the water shut-off plug baffle). When the faucet is open, the water pressure keeps the shut-off plug at the top, causing a small amount of water to seep out. To use the water again, turn off the faucet and wait 3-5 seconds (no operation of the automatic shut-off valve body is required). As the water pressure inside the valve body reaches equilibrium at the faucet, the pressure ball and the circular steel rod shut-off plug move rapidly downwards under their own weight. The plug disengages from the main water outlet and moves to the lower limit stop, opening the main water outlet and restoring water flow. Simultaneously, the rack moves downwards with the plug and hooks onto the lowest tooth of the reducer gear. Opening the faucet again allows normal water flow, initiating the next water usage-automatic shut-off cycle. If the user's water usage is low and the shut-off flow rate is below the set limit before closing the faucet, the shut-off valve automatically resets. When the water consumption reaches the set flow rate of the shut-off valve, the valve will automatically cut off the water supply. If you need to use water again, first turn off the open end faucet, wait 3-5 seconds, and then turn the end faucet back on to get water again. Beneficial effects:

[0015] Purely mechanical structure, no electricity required: This device relies entirely on water flow power and mechanical transmission to achieve automatic water shut-off, without depending on external power supply or batteries, eliminating the risk of circuit failure, and is suitable for scenarios without power supply, with a very wide range of applications.

[0016] Significant water-saving effect: The water cut-off flow can be preset according to water demand. When the water flow reaches the preset flow, the water will be automatically and accurately cut off, completely eliminating water waste caused by forgetting to turn off the water or running water. According to tests, the water-saving efficiency can reach 20%-35%.

[0017] Simple structure and strong stability: few core components, no precision electronic components, not easily affected by water quality and scale, low failure rate, long service life of 5-8 years, and convenient maintenance.

[0018] Highly adaptable and easy to install: It adopts a standard threaded interface, which can be directly connected to existing water supply pipes without the need to modify the pipeline. It can be quickly installed in homes, public places, agricultural irrigation and other scenarios.

[0019] Highly adjustable and flexible to use: By changing the transmission gears with different reduction ratios, the water cut-off time can be adjusted to meet the needs of different water use scenarios such as washing, laundry, and irrigation. The reset operation is simple and can be easily used by the elderly and children.

[0020] Low cost and easy to popularize: The material is common, the processing technology is simple, the production cost is low, and it is suitable for mass production and widespread promotion, which helps the whole nation to save water. Attached image description:

[0021] Figure 1 is a schematic diagram of the overall structure of the mechanical automatic water shut-off device of the present invention.

[0022] Explanation of reference numerals in the attached diagram: 1-Water outlet; 2-Water pipe connector; 3-Pipe; 4-Bypass pipe; 5-Water shut-off plug guide pipe; 6-Pressure steel ball; 7-Circular steel column water shut-off plug; 8-Reset baffle; 9-Rack; 10-Gear reducer; 11-Valve body; 12-Gear; 13-Impeller; 14-Water pipe connector; 15-Water inlet; 16-Pressure steel ball baffle; 17-Water shut-off plug baffle. Detailed implementation method: The present invention will be further described below with reference to specific embodiments:

[0023] Example 1: A mechanical automatic water shut-off device includes an inlet port, an outlet port, a valve body, a gear reducer, a sealing water shut-off assembly, and a flow impeller mechanism. The inlet and outlet ports use DN20 standard threaded interfaces. The valve body is made of corrosion-resistant and pollution-free material (the specific material is determined based on factors such as corrosion resistance, scale resistance, water head pressure, environmental protection, and food safety regulations). The water flow impeller of the mechanical trigger mechanism uses arc-shaped blades. The reduction ratio of the transmission gear set can be adjusted according to the inlet pipe diameter and water pressure, generally 15:1. The water shut-off delay time is set according to the water flow rate and pipe diameter. For example, for a DN20 pipe diameter, the delay time is approximately 1 minute. After water shut-off, a small amount of water leakage will occur between the shut-off piston and the closed valve to achieve the water pressure difference between the valve body and the end faucet. When the end faucet is closed, the water pressure between the valve body and the end faucet is balanced, and the valve body automatically resets. This device is installed in the water supply pipe of the bathroom sink. When the tap is turned on, the water flow impacts the impeller to rotate. After 1 minute, the water supply is automatically cut off. After use, the valve body will reset after the tap is turned off, and water will flow again. There is no power consumption and no malfunctions during use, effectively avoiding water waste caused by prolonged water flow when washing hands.

[0024] Example 2: The reduction ratio of the transmission gear set is adjusted to 10:1, the water cut-off delay time is set to 30 seconds, the valve body is made of corrosion-resistant and pollution-free material (the specific material is determined according to factors such as water head pressure, environmental protection, and food safety regulations), the inlet and outlet interfaces are DN25 standard threaded interfaces, and it is installed in the public water supply pipeline to meet the needs of high-frequency and short-duration public water use, avoiding the waste problem of unattended taps. The device is corrosion-resistant and suitable for high-frequency use in public scenarios.

Claims

1. A mechanical automatic water shutoff device, characterized by, Includes valve body (11), water inlet (15), water outlet (1), water cut-off assembly, mechanical triggering mechanism and reset adjustment mechanism; The inlet (15) and outlet (1) are respectively located on both sides of the valve body (11) and communicate with the internal water passage cavity; The water cut-off component, mechanical triggering mechanism and reset adjustment mechanism are all installed inside the valve body (11); The water cut-off assembly includes a water cut-off plug guide tube (5), a pressure steel ball (6), a circular steel column water cut-off plug (7), and a bypass tube (4). The mechanical triggering mechanism includes a water flow impeller (13), a gear (12), a gear reducer (10), and a rack (9). The reset adjustment mechanism includes a reset baffle (8); The water impeller (13) is located in the water passage cavity inside the water inlet (15), and the shaft of the water impeller (13) is connected to the gear reducer (10) through the gear (12); The gear reducer (10) is linked to the circular steel column water cut-off plug (7) via a rack (9); The circular steel column water cut-off plug (7) and the pressure steel ball (6) are respectively installed in the corresponding guide tubes, and the bottom of the circular steel column water cut-off plug (7) is positioned in conjunction with the reset baffle (8).

2. The mechanical automatic water cutoff device according to claim 1, characterized in that, The gear reducer (10) adopts a multi-stage reduction gear structure with a gear reduction ratio of 10:1 to 15:

1.

3. The mechanical automatic water cutoff device according to claim 1, wherein The water impeller (13) has an arc-shaped blade structure, and the blade surface is provided with anti-slip water flow grooves.

4. The mechanical automatic water cutoff device according to claim 1, wherein A seepage gap is provided between the circular steel column water-cutting plug (7) and the water-cutting plug guide pipe (5).

5. The mechanical automatic water shut-off device according to claim 1, wherein Both the inlet (15) and outlet (1) are standard threaded interfaces.

6. The mechanical automatic water shut-off device according to claim 1, wherein The valve body (11), the water cut-off plug guide pipe (5), and the bypass pipe (4) are made of materials that are corrosion-resistant, scale-resistant, and meet the environmental protection requirements for food contact.

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