Leakage-proof protection device for water supply of water tank

Abstract

The utility model relates to a water tank water supply leakage-proof protection device which comprises a water tank, the bottom of the water tank is communicated with a water supply pipe, and a water inlet electromagnetic valve is arranged on the water supply pipe. A water leakage protector is arranged between the water inlet electromagnetic valve and the water tank on the water supply pipe, an overflow conduction pipe is longitudinally arranged in the water tank, and the lower part of the overflow conduction pipe extends out of the water tank and is arranged in the water receiving box; the floater is arranged in the water receiving box, a through hole is axially formed in the center of the floater, and a magnetic ring is embedded in the inner wall of the through hole; a water inlet and a water outlet which are communicated with the water supply pipe are formed in the two sides of the installation base, a sealing gasket is installed in the installation base, a water outlet gap communicated with the water inlet and the water outlet is formed above the sealing gasket, and a magnetic column ejector rod is longitudinally arranged in the lower portion of the upper cover. The magnetic repulsive force drives the magnetic column ejector rod to move upwards to push the sealing gasket to close the water outlet gap. According to the scheme, after the liquid level sensor loses efficacy, a water path can be mechanically cut off through the water leakage protector, and the dual-protection effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of drinking water equipment technology, and in particular to a water tank water supply leak prevention protection device. Background Technology

[0002] Traditional water tank supply systems typically rely on level sensors to control the opening and closing of solenoid valves and use leakage sensors for secondary leakage protection. However, sensor malfunctions or circuit failures can easily lead to continuous water intake into the tank, causing overflows and potentially resulting in personal injury or property damage. Existing mechanical leak-proof devices mostly use a single float valve structure, which suffers from insufficient sealing, delayed response, and limitations on water flow.

[0003] Traditional water tanks use a float ball for water replenishment. The effective cross-section of the water inlet is affected by the water level, which increases the water inlet resistance and affects the water flow rate.

[0004] Traditional water tank overflow outlets are directly externally located at the highest liquid level in the tank, and the overflow pipe is directly exposed to the external environment, which can easily introduce pollutants, affecting water quality and tank cleanliness.

[0005] Traditional water tank vents open directly upwards, coming into direct contact with the atmosphere, which can easily introduce pollutants and affect water quality and tank cleanliness. Summary of the Invention

[0006] To address the aforementioned issues, the present invention aims to provide a water tank water supply leak protection device. By connecting a leak protector in series behind the water inlet solenoid valve on the water supply pipe, the water circuit can be mechanically cut off by the leak protector after the liquid level sensor fails, providing dual protection. The magnetic drive and water pressure-assisted sealing provide good sealing performance and fast response. At the same time, the direct water supply design at the bottom of the water tank does not increase additional water supply resistance, ensuring water supply flow and stability. The closed overflow pipe design avoids external contamination.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A water tank water supply leak prevention protection device includes a water tank, a liquid level sensor at the top of the water tank, a water supply pipe connected to the bottom inlet of the water tank, and an inlet solenoid valve on the water supply pipe; characterized in that: a leak protector is provided on the water supply pipe between the inlet solenoid valve and the water tank, the leak protector includes a water receiving box and a protector body located in the water receiving box at the bottom, an overflow guide pipe is arranged longitudinally inside the water tank, an overflow gap is formed between the upper end of the overflow guide pipe and the lower end of the water tank cover, and the lower part of the overflow guide pipe extends out of the water tank and is placed in the water receiving box;

[0009] The protector body includes a T-shaped housing and a float. The float is housed in a water receiving box and has a through hole along its central axis. A magnetic ring is embedded in the inner wall of the through hole. The T-shaped housing includes a mounting base and a top cover mounted on the mounting base. The mounting base has an inlet and an outlet on both sides that are connected to the water supply pipe. A sealing gasket is installed inside the mounting base, and an outlet gap connecting the inlet and outlet is formed above the sealing gasket. The lower part of the top cover passes through the through hole of the float, and a magnetic rod is longitudinally arranged inside the lower part of the top cover. A magnetic repulsion force can be formed between the magnetic rod and the magnetic ring. When the water level in the water receiving box rises, the float moves upward, and the magnetic repulsion force drives the magnetic rod to move upward, pushing the sealing gasket to close the outlet gap.

[0010] Preferably, a spring is sleeved on the magnetic column top rod, the lower end of the spring is installed on the magnetic column top rod, and a baffle that cooperates with the upper end of the spring is provided circumferentially on the lower inner wall of the upper cover.

[0011] Preferably, the upper end of the magnetic rod is sealed with a plastic head.

[0012] Preferably, the mounting base has an inlet chamber and an outlet chamber spaced apart above the sealing gasket, and the outlet gap is formed between the two side walls of the outlet chamber and the sealing gasket.

[0013] Preferably, the lower end of the mounting base has a groove formed in the circumference, the outer ring of the sealing gasket is fitted into the groove, and the upper outer edge of the cover is provided with a clamping ring that presses against the lower end of the outer ring of the sealing gasket.

[0014] Preferably, the sealing gasket has a first pressure balance hole and a second pressure balance hole below the water inlet chamber and the water outlet chamber, respectively, and the upper end of the top cover forms a pressure balance chamber that communicates with the first pressure balance hole and the second pressure balance hole.

[0015] Preferably, a plastic pressure plate is attached to the lower end of the sealing gasket, and the plastic pressure plate is snapped onto the sealing gasket.

[0016] Preferably, a retaining ring extends downward from the middle of the lower end of the plastic pressure plate.

[0017] Preferably, a baffle plate is provided above the water inlet inside the water tank.

[0018] This utility model adopts the above-mentioned technical solution. The water supply pipe is connected to the inlet solenoid valve and a leakage protector in series. Water is directly replenished from the bottom of the water tank. The water tank has an internal overflow pipe, the outlet of which extends to the water receiving box of the protector. The overflow pipe extends vertically from the bottom of the water tank to below the top cover, leaving a gap for dust prevention and forming a closed overflow channel. The water tank is equipped with a liquid level sensor. When the liquid level sensor is high, it closes the inlet solenoid valve and activates the first protection. When the water tank liquid level sensor fails, water is replenished to the upper opening of the overflow pipe and flows into the water receiving box from the pipe, activating the second protection. The water receiving box has an internal float (including a magnetic ring). Through magnetic repulsion, the magnetic column pusher pushes the sealing gasket upward to close the water outlet gap and block the water path. It has the following beneficial effects:

[0019] ① A water leakage protector is installed in series on the back side of the water inlet solenoid valve on the water supply pipe. After the liquid level sensor fails, the water circuit can be mechanically cut off by the water leakage protector, which plays a dual protection role, eliminates the risk of water leakage, and solves the problem of lack of backup cut-off mechanism after the liquid level sensor fails.

[0020] ② The magnetic drive between the magnetic ring and the magnetic column, combined with water pressure-assisted sealing, results in a fast response speed, improving the rapid response capability and sealing strength of the leakage protector.

[0021] ③ The direct water supply design at the bottom of the water tank does not increase additional water supply resistance, ensuring water supply flow and stability. It avoids the problem of high liquid level mechanical float water supply, which has high resistance, causing the pump of the pre-water supply equipment to start frequently, increasing energy consumption and reducing the life of the water supply equipment.

[0022] ④ The closed overflow pipe design avoids direct exposure of the overflow pipe, which could lead to dust and bacteria contaminating the water tank.

[0023] ⑤ The overflow pipe also serves as an exhaust pipe, simplifying the structure while further reducing direct contact between the water tank environment and the atmosphere.

[0024] ⑥ The water leakage protector has a purely mechanical structure with no circuit dependence, reducing the risk of circuit abnormalities or electromagnetic interference. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the installation of the water tank and the leak protector.

[0026] Figure 2 This is a cross-sectional diagram of the leak protector in its natural state.

[0027] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0028] Figure 4 This is a cross-sectional diagram of a water leakage protector when it detects a leakage.

[0029] Figure 5for Figure 4 Enlarged diagram of point B. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 utility model according to the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] like Figures 1-5 The water tank water supply leak prevention protection device shown includes a water tank 1, a liquid level sensor 2 is provided on the top of the water tank 1, a water supply pipe 3 is connected to the bottom water inlet of the water tank 1, and a water inlet solenoid valve 4 is provided on the water supply pipe 3; a leak protector 5 is provided on the water supply pipe 3 between the water inlet solenoid valve 4 and the water tank 1, the leak protector 5 includes a water receiving box 6 and a protector body located in the water receiving box 6 at the bottom, an overflow guide pipe 7 is provided longitudinally in the water tank 1, an overflow gap is formed between the upper end of the overflow guide pipe 7 and the lower end of the water tank cover 31, and the lower part of the overflow guide pipe 7 extends out of the water tank 1 and is placed in the water receiving box 6;

[0036] The protector body includes a T-shaped housing and a float 8. The float 8 is disposed in a water receiving box 6. A through hole 9 is provided in the central axis of the float 8. A magnetic ring 10 is embedded in the inner wall of the through hole 9. The T-shaped housing includes a mounting base 11 and an upper cover 12 mounted on the mounting base 11. The mounting base 11 has an inlet 13 and an outlet 14 on both sides that are connected to the water supply pipe 3. A sealing gasket 15 is installed in the mounting base 11. An outlet gap 16 is formed above the sealing gasket 15, connecting the inlet 13 and the outlet 14. The lower part of the upper cover 12 passes through the through hole 9 of the float 8. A magnetic column rod 17 is longitudinally provided in the lower part of the upper cover 12. A magnetic repulsion force can be formed between the magnetic column rod 17 and the magnetic ring 10. When the water level in the water receiving box 6 rises, the float 8 moves upward. The magnetic repulsion force drives the magnetic column rod 17 to move upward and push the sealing gasket 15 to close the outlet gap 16.

[0037] In the above technical solution, the water supply pipe is connected to the inlet solenoid valve and a leakage protector in series. Water is directly replenished from the bottom of the water tank via an internal overflow pipe, the outlet of which extends into the protector's receiving box. The overflow pipe extends vertically from the bottom of the water tank to below the top cover, leaving a gap for dust prevention, forming a closed overflow channel. The water tank is equipped with a level sensor. When the level sensor activates at a high level, it closes the inlet solenoid valve, initiating the first layer of protection. When the water tank level sensor fails, water is replenished to the top of the overflow pipe, flowing into the receiving box and activating the second layer of protection. The receiving box contains a float (including a magnetic ring), which, through magnetic repulsion, drives a magnetic rod to push the sealing gasket upward, closing the water outlet gap and blocking the water path. This provides dual protection, eliminating the risk of leakage and solving the problem of the lack of a backup cut-off mechanism after the level sensor fails.

[0038] The magnetic drive between the magnetic ring and the magnetic column results in a fast response speed, enhancing the rapid response capability of the leakage protector.

[0039] The direct water supply design at the bottom of the water tank does not add extra water supply resistance, ensuring water supply flow and stability. It avoids the problem of high-level mechanical float water supply, which has high resistance, causing frequent starts of the pre-supply water supply equipment pump, increasing energy consumption and reducing the life of the water supply equipment.

[0040] The closed overflow conduit design prevents the overflow pipe from being directly exposed, thus avoiding dust and bacteria contamination of the water tank.

[0041] The overflow pipe also serves as a venting function, simplifying the structure while further reducing direct contact between the water tank environment and the atmosphere.

[0042] The water leakage protector has a purely mechanical structure with no circuit dependence, reducing the risk of circuit abnormalities or electromagnetic interference.

[0043] Furthermore, a spring 18 is fitted onto the magnetic rod 17, with the lower end of the spring 18 mounted on the magnetic rod 17. A baffle 19, which mates with the upper end of the spring 18, is circumferentially provided on the lower inner wall of the upper cover 12. In this technical solution, when the magnetic rod moves upward, the spring contacts the baffle and is compressed. When the fault is cleared, the liquid in the water collection box is drained, and the float, under the influence of gravity, descends to the bottom. The magnetic rod loses its repulsive force, and the spring pulls the magnetic rod back.

[0044] Furthermore, the upper end of the magnetic push rod 17 is sealed with a plastic head 20. In this technical solution, when the magnetic push rod pushes the sealing gasket upward, the plastic head provides a flexible contact, avoids wear, and has a good clamping effect.

[0045] Furthermore, an inlet chamber 21 and an outlet chamber 22 are formed within the mounting base 11 above the sealing gasket 15 at a distance, and the outlet gap 16 is formed between the two side walls of the outlet chamber 22 and the sealing gasket 15. In this technical solution, the inlet chamber and the outlet chamber are separated by a partition, and the fluid forms the main flow channel from the inlet to the inlet chamber, to the outlet gap, to the outlet chamber, and to the outlet.

[0046] Furthermore, a groove 23 is formed circumferentially at the lower end of the mounting base 11, and the outer ring of the sealing gasket 15 is fitted into the groove 23. A clamping ring 24 is provided at the upper outer edge of the upper cover 12 to press against the lower end of the outer ring of the sealing gasket 15. In this technical solution, the sealing gasket is first fitted into the groove of the mounting base, and then pressed tightly by the clamping ring to form a tight fit. When the sealing gasket is pushed upward by the magnetic column push rod, the outer part of the sealing gasket deforms and then closes the water outlet gap.

[0047] Furthermore, the sealing gasket 15 is provided with a first pressure balancing hole 25 and a second pressure balancing hole 26 below the water inlet chamber 21 and the water outlet chamber 22, respectively. The upper end of the upper cover 12 forms a pressure balancing chamber 27 that communicates with the first pressure balancing hole 25 and the second pressure balancing hole 26. In this technical solution, the first pressure balancing hole and the second pressure balancing hole are set to connect the water inlet chamber and the water outlet chamber respectively to balance the chamber pressure. At the same time, after the sealing gasket closes the water outlet gap, the fluid flows into the pressure balancing chamber through the channel of the first pressure balancing hole. After the fluid overflows the water inlet chamber and the pressure balancing chamber, the water inlet pressure acts on the plastic pressure plate, which further enhances the sealing performance of the water outlet gap by squeezing the plastic sealing gasket, and further blocks the water flow.

[0048] Furthermore, a plastic pressure plate 28 is attached to the lower end of the sealing gasket 15, and the plastic pressure plate 28 is snap-fitted onto the sealing gasket 15. In this technical solution, the setting of the plastic pressure plate improves the structural strength of the sealing gasket, and at the same time facilitates the action of the magnetic column top rod to cooperate with the pressure plate for tightening.

[0049] Furthermore, a retaining ring 29 extends downward from the lower center of the plastic pressure plate 28. In this technical solution, the retaining ring improves the structural strength of the plastic pressure plate and, to a certain extent, prevents the plastic head from shifting, enabling it to continuously seal the second pressure balance hole.

[0050] Furthermore, a baffle plate 30 is provided above the water inlet in the water tank 1. In this technical solution, the baffle plate at the upper end of the water inlet prevents water from spraying into the water tank, avoids the upward sprayed water column from accidentally entering the overflow outlet of the overflow pipe, and prevents water from spraying onto the liquid level sensor and triggering its operation.

[0051] The protection and control logic of this scheme is as follows: First-level protection: the liquid level sensor triggers the water inlet solenoid valve to close; Second-level protection: when the liquid level exceeds the limit, water flows into the water receiving box through the overflow pipe, and the float rises to trigger mechanical cut-off.

[0052] The working principle of the water leakage protector in this case is as follows:

[0053] 1. During normal water intake, the inlet pressure pushes open the sealing gasket, and the fluid passes through the first pressure balance hole and the second pressure balance hole, connecting the inlet chamber, the outlet chamber, and the pressure balance chamber. 3. Since the resistance of the inlet chamber through the outlet gap is much smaller than that of the first pressure balance hole, most of the fluid passes through the outlet gap, through the outlet chamber, and flows out from the outlet.

[0054] 2. Leakage detection action of the leakage protector: The level sensor fails, the water level reaches the overflow pipe opening, and overflows into the water collection box. 3. The float in the water collection box rises with the liquid level. 4. The float's magnetic ring, through repulsion, lifts the magnetic column rod. 5. The magnetic column rod pushes the plastic pressure plate, and the sealing gasket closes the water outlet gap. At the same time, the plastic head at the end of the magnetic column rod continuously seals the second pressure balance hole. Fluid flows into the pressure balance chamber through the inlet chamber to the first pressure balance hole channel. The inlet water pressure acts on the plastic pressure plate, further strengthening the sealing performance of the water outlet gap by squeezing the sealing gasket, further blocking the water flow. 6. When the fault is cleared, the liquid in the water collection box is emptied. The float, under the action of gravity, descends to the bottom, the magnetic column rod loses its repulsive force, and the spring pulls the magnetic column rod back. The two pressure balance holes are connected, rebalancing the pressure in the water outlet chamber and the pressure balance chamber. 7. When water enters, the inlet pressure pushes the sealing gasket again, the outlet gap increases, and the leakage protector can pass water normally.

[0055] It should be noted that the sealing gasket in this case is a plastic sealing gasket, but it can also be other materials with sealing effect.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A water tank water supply leak prevention protection device, comprising a water tank (1), a liquid level sensor (2) provided on the top of the water tank (1), a water supply pipe (3) connected to the bottom water inlet of the water tank (1), and an inlet solenoid valve (4) provided on the water supply pipe (3); characterized in that: A water leakage protector (5) is provided on the water supply pipe (3) between the water inlet solenoid valve (4) and the water tank (1). The water leakage protector (5) includes a water receiving box (6) and a protector body located in the water receiving box (6). An overflow guide pipe (7) is provided longitudinally in the water tank (1). An overflow gap is formed between the upper end of the overflow guide pipe (7) and the lower end of the water tank cover (31). The lower part of the overflow guide pipe (7) extends out of the water tank (1) and is placed in the water receiving box (6). The protector body includes a T-shaped housing and a float (8). The float (8) is located inside the water receiving box (6). The float (8) has a through hole (9) in its central axis. A magnetic ring (10) is embedded in the inner wall of the through hole (9). The T-shaped housing includes a mounting base (11) and a top cover (12) mounted on the mounting base (11). The mounting base (11) has an inlet (13) and an outlet (14) on both sides that are connected to the water supply pipe (3). A sealing gasket (15) is installed inside the mounting base (11) to seal the water supply pipe. A water outlet gap (16) is formed above the pad (15) to connect the inlet (13) and the outlet (14). The lower part of the cover (12) passes through the through hole (9) of the float (8). A magnetic rod (17) is longitudinally arranged in the lower part of the cover (12). A magnetic repulsion force can be formed between the magnetic rod (17) and the magnetic ring (10). When the water level in the water receiving box (6) rises, the float (8) moves upward. The magnetic repulsion force drives the magnetic rod (17) to move upward and push the sealing pad (15) to close the water outlet gap (16).

2. The water tank water supply leak-proof protection device according to claim 1, characterized in that: A spring (18) is fitted on the magnetic rod (17), and the lower end of the spring (18) is installed on the magnetic rod (17). The lower inner wall of the upper cover (12) is provided with a baffle (19) that cooperates with the upper end of the spring (18).

3. The water tank water supply leak-proof protection device according to claim 2, characterized in that: The upper end of the magnetic rod (17) is sealed with a plastic head (20).

4. The water tank water supply leak-proof protection device according to claim 1, characterized in that: The mounting base (11) has an inlet chamber (21) and an outlet chamber (22) spaced above the sealing gasket (15), and the outlet gap (16) is formed between the two side walls of the outlet chamber (22) and the sealing gasket (15).

5. A water tank water supply leak-proof protection device according to claim 4, characterized in that: The mounting base (11) has a groove (23) formed circumferentially at its lower end. The outer ring of the sealing gasket (15) is fitted into the groove (23). The upper outer edge of the cover (12) is provided with a clamping ring (24) that presses against the lower end of the outer ring of the sealing gasket (15).

6. A water tank water supply leak-proof protection device according to claim 5, characterized in that: The sealing gasket (15) is provided with a first pressure balance hole (25) and a second pressure balance hole (26) below the water inlet cavity (21) and the water outlet cavity (22), respectively. The upper end of the cover (12) forms a pressure balance cavity (27) that communicates with the first pressure balance hole (25) and the second pressure balance hole (26).

7. A water tank water supply leak-proof protection device according to claim 6, characterized in that: A plastic pressure plate (28) is attached to the lower end of the sealing gasket (15), and the plastic pressure plate (28) is snapped onto the sealing gasket (15).

8. A water tank water supply leak-proof protection device according to claim 7, characterized in that: The lower middle part of the plastic pressure plate (28) extends downward to form a retaining ring (29).

9. A water tank water supply leak-proof protection device according to claim 1, characterized in that: The water tank (1) is equipped with a baffle plate (30) above the water inlet.

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