Backflow prevention water nozzle

Abstract

The utility model discloses an anti-backflow water nozzle which comprises a water nozzle body and an inner cavity arranged in the water nozzle body, one end of the inner cavity is provided with a water inlet cavity, the other end of the inner cavity is provided with a water outlet cavity, and an anti-backflow assembly is arranged between the inner cavity and the water outlet cavity and comprises an anti-backflow connector connected to the water nozzle body. The backflow preventing connector is provided with a water passing groove, the inner cavity is communicated with the water outlet cavity through the water passing groove, a floating cavity is formed in the backflow preventing connector, a movable sealing piece is arranged in the floating cavity, and the sealing piece is used for being connected with the water nozzle body in an abutting mode when water flows back so as to prevent water flow from entering the inner cavity. The backflow prevention connector is further provided with a water flow channel communicated with the outside, and the water flow channel is communicated with the floating cavity. The anti-backflow device has a certain self-cleaning effect, impurities can be prevented from entering the anti-backflow assembly, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of washing machine technology, and in particular to an anti-backflow nozzle. Background Technology

[0002] A backflow prevention nozzle is a small device installed on the washing machine's water inlet pipe or inlet interface. Under normal water supply conditions, it allows tap water to enter the washing machine smoothly, but automatically shuts off the water supply in case of backflow, effectively preventing dirty water from flowing back into the washing machine, thus avoiding water pollution and ensuring the cleanliness and safety of household water use.

[0003] In existing anti-backflow faucets, the structure is relatively simple, and the anti-backflow component is directly exposed in the inlet and outlet water path. When there are impurities such as scale, fiber, and silt in the equipment, these impurities can easily enter the active area of ​​the anti-backflow component with the water flow, causing the active structure to be stuck by foreign objects and unable to reset, resulting in backflow failure, increasing the maintenance frequency, and affecting the service life. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an anti-backflow water nozzle that has a certain self-cleaning effect, can block impurities from entering the anti-backflow component, and extend its service life.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A backflow prevention faucet includes a faucet body and an inner cavity disposed within the faucet body. One end of the inner cavity has an inlet cavity, and the other end has an outlet cavity. An backflow prevention assembly is disposed between the inner cavity and the outlet cavity. The backflow prevention assembly includes a backflow prevention connector connected to the faucet body. The backflow prevention connector has a through hole, through which the inner cavity communicates with the outlet cavity. A floating cavity is disposed within the backflow prevention connector, and a water flow channel communicating with the outside is provided on the backflow prevention connector. The water flow channel communicates with the floating cavity, and a [missing information - likely a specific feature or design] is provided within the floating cavity. The device has a first movable block with a first water-blocking part and a water-passing groove. The inner cavity is connected to the floating cavity through the water-passing groove. The first movable block contains a second movable block with a first elastic element between the second movable block and the first movable block. The second movable block has a second water-blocking part located above the water-passing groove. The inner cavity has a step. The second water-blocking part is used to abut against the step under the action of backflow water to prevent water from entering the inner cavity.

[0007] A further feature of this invention is that a filter plug is provided inside the water flow channel.

[0008] A further feature of this invention is that the second water-blocking part is provided with a guide slope.

[0009] A further feature of this invention is that: the first movable block is provided with a movable groove, the first elastic member is disposed in the movable groove, the second movable block is provided with a limiting block, the limiting block is disposed in the movable groove, one end of the first elastic member abuts against the limiting block, and the other end abuts against the bottom of the movable groove.

[0010] A further feature of this invention is that a water outlet connector is connected to the anti-backflow connector, the water outlet cavity is disposed inside the water outlet connector, and a sealing ring is provided between the first water-blocking part and the anti-backflow connector.

[0011] A further feature of this invention is that the first movable block is a triangular prism structure.

[0012] A further feature of this invention is that a control valve assembly for controlling the opening and closing of the water inlet is provided between the water inlet chamber and the inner cavity.

[0013] A further feature of this invention is that the control valve assembly includes a valve body connected to the faucet body, an upper valve core is threadedly connected to the valve body, a movable lower valve core is connected to the upper valve core, and the lower valve core is disposed between the water inlet chamber and the inner chamber, and controls the flow of water.

[0014] A further feature of this invention is that the upper valve core has a slot, the lower valve core is inserted into the slot, and the slot also has a second elastic member, one end of which abuts against the upper valve core and the other end of which abuts against the lower valve core.

[0015] A further feature of this invention is that the upper valve core is provided with a handle.

[0016] In use, water flows through the lower valve core of the control valve assembly, opening it and entering the inner cavity. It then passes through the anti-backflow assembly into the outlet cavity. When water stops flowing from the outlet cavity, the water level inside the washing machine is higher than the outlet cavity. Water then flows through the water flow channel into the floating cavity. The first movable block, influenced by buoyancy, causes the second movable block to move upwards, causing the second water-blocking part to abut against the step. This second water-blocking part blocks the connection between the inner cavity and the outlet cavity, preventing water from flowing back from the outlet cavity into the inner cavity. Simultaneously, impurities inside the washing machine are blocked by the filter plug in the water flow channel. Previously, when the washing machine was filled with water, the water flowed from the inner cavity into the outlet cavity. The second water baffle was impacted, causing the second and first movable blocks to move downwards. Some of the water flow entered through the water channel, into the floating cavity and the water flow channel, flushing the impurities blocked by the filter plug back into the washing machine. When the impact of the water flow was large enough, the first elastic element was compressed, and the second movable block continued to move downwards, causing the second water baffle to block the water channel, so that the water flow could no longer enter the floating cavity, but could only enter the outlet cavity through the through hole and be discharged from the outlet connector.

[0017] The beneficial effects of this utility model are:

[0018] When the water outlet stops flowing from the outlet chamber and the external water level is higher than that of the outlet chamber, the present invention automatically triggers a backflow blocking mechanism, which can effectively prevent water from flowing back into the inner cavity.

[0019] The filter plug can prevent impurities from entering the floating chamber in a backflow-proof state.

[0020] During the water inlet impact process, some of the water flow will wash the front end of the filter plug and carry impurities back into the equipment, achieving a certain self-cleaning effect and extending the service life of the device. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the present invention.

[0022] Figure 2 yes Figure 1 A magnified view of A in the middle.

[0023] Figure 3 This is a schematic diagram of the anti-backflow connector of this utility model.

[0024] Figure 4 This is a schematic diagram of the structure of the first movable block and the second movable block of this utility model.

[0025] In the diagram: 1. Water tap body; 2. Inner cavity; 3. Inlet cavity; 4. Outlet cavity; 5. Anti-backflow connector; 6. Through hole; 7. Floating cavity; 8. Water flow channel; 9. First movable block; 10. First water baffle; 11. Water passage groove; 12. Second movable block; 13. First elastic element; 14. Second water baffle; 15. Stepped part; 16. Filter plug; 17. Guide slope; 18. Movable groove; 19. Limiting block; 20. Outlet connector; 21. Sealing ring; 22. Valve body; 23. Upper valve core; 24. Lower valve core; 25. Slot; 26. Second elastic element; 27. Handle; 28. Water passage part. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] according to Figures 1 to 4As shown, the present invention provides an anti-backflow faucet, comprising a faucet body 1 and an inner cavity 2 disposed within the faucet body 1. One end of the inner cavity 2 is provided with a water inlet cavity 3, and the other end is provided with a water outlet cavity 4. An anti-backflow assembly is provided between the inner cavity 2 and the water outlet cavity 4. The anti-backflow assembly includes an anti-backflow connector 5 connected to the faucet body 1. The anti-backflow connector 5 is provided with a water passage portion 28, and the water passage portion 28 is provided with a through hole 6. The through hole 6 connects the inner cavity 2 and the water outlet cavity 4. A water outlet connector 20 is connected to the anti-backflow connector 5, and the water outlet cavity 4 is disposed within the water outlet connector 20.

[0028] The anti-backflow connector 5 has a floating cavity 7, which is connected to the inner cavity 2. The anti-backflow connector 5 also has a water flow channel 8 connected to the outside, which is connected to the floating cavity 7. A filter plug 16 is installed in the water flow channel 8 to prevent large particles of impurities from entering the floating cavity 7 with the backflow water and causing blockage. The floating cavity 7 has a sealing structure, which is opened by the water flow under the action of the forward water flow, allowing water to flow from the inner cavity 2 to the outlet cavity 4. When the washing machine stops filling with water and the liquid level inside is higher than the liquid level in the outlet cavity 4, water can enter the floating cavity 7 through the water flow channel 8. Without the need for electrical components or sensor control, the backflow water pressure is automatically applied to the sealing structure, thereby activating the backflow blocking mechanism.

[0029] The sealing structure includes a first movable block 9 disposed within a floating cavity 7. The first movable block 9 can move up and down within the floating cavity 7. The first movable block 9 is provided with a first water-blocking part 10, and a water-passing groove 11 is formed on the first water-blocking part 10 for allowing water to flow from the inner cavity 2 into the floating cavity 7 under the action of positive water flow. A second movable block 12 is provided within the first movable block 9. The second movable block 12 can move up and down relative to the first movable block 9. A first elastic member 13 is provided between the two. The second movable block 12 is provided with a second water-blocking part 14, which is disposed above the water-passing groove 11 of the first water-blocking part 10. The first elastic member 13 provides an upward elastic force, so that the second movable block 12 needs a certain pressure to make the second water-blocking part 14 abut against the first water-blocking part 10. The inner cavity 2 has a stepped portion 15. When water flows back, the first movable block 9 floats upward, causing the second water-blocking portion 14 on the second movable block 12 to abut against the stepped portion 15, thereby blocking the water flow path between the outlet cavity 4 and the inner cavity 2 and preventing backflow. In addition, the first movable block 9 has a triangular prism structure. Therefore, a floating channel is formed between the side wall of the first movable block 9 and the floating cavity 7, providing sufficient space between the first movable block 9 and the anti-backflow connector 5. At the same time, it increases the bottom area of ​​the first water-blocking portion 9 in contact with water, facilitating water flow to enter and apply buoyancy to the first movable block 9.

[0030] The second water-blocking part 14 is provided with a guide slope 17. When impacted by water flow, the guide slope 17 guides the water flow to enter the water channel 11 first, and flushes the floating cavity 7 and the water flow channel 8.

[0031] A sealing ring 21 is provided between the first water-blocking part 10 and the anti-backflow connector 5. When the water pressure is high enough, the second movable block 12 continues to move downward, so that the second water-blocking part 14 abuts against the first water-blocking part 10. The first water-blocking part 10 drives the sealing ring 21 to abut against the anti-backflow connector 21, so that the first water-blocking part 10 and the anti-backflow connector 5 are sealed, ensuring that the water can only enter the water outlet chamber 4 through the through hole 6, preventing diversion.

[0032] Furthermore, a control valve assembly is provided between the inlet chamber 3 and the inner chamber 2. The control valve assembly includes a valve body 22 connected to the faucet body 1. An upper valve core 23 is internally threaded onto the valve body 22. A movable lower valve core 24 is connected to the lower part of the upper valve core 23. The lower valve core 24 is used to control the flow of water between the inlet chamber 3 and the inner chamber 2. The upper valve core 23 has a slot 25, into which the lower valve core 24 is inserted. A second elastic element 26 is provided, with one end abutting against the upper valve core 23 and the other end abutting against the lower valve core 24. The second elastic element 26 applies pressure to the lower valve core 24, requiring sufficient flow to open it. A handle 27 on the upper valve core 23 allows manual adjustment of its position to regulate the pressure of the second elastic element 26 and control the water flow rate.

[0033] In use, the water flow opens the lower valve core 24 of the control valve assembly and enters the inner cavity 2. It then passes through the anti-backflow assembly into the outlet cavity 4. When the outlet cavity 4 stops discharging water, because the liquid level inside the washing machine is higher than the outlet cavity 4, the water flow enters the floating cavity 7 through the water flow channel 8. The first movable block 9, influenced by buoyancy, drives the second movable block 12 upwards, causing the second water-blocking part 14 to abut against the step part 15. The second water-blocking part 14 blocks the connection between the inner cavity 2 and the outlet cavity 4, preventing water from flowing back from the outlet cavity 4 into the inner cavity 2. Simultaneously, impurities inside the washing machine are blocked by the filter plug 16 in front of the water flow channel 8. When the washing machine is filled with water, the water flows from the inner cavity 2 into the outlet cavity 4. The second water baffle 14 is impacted, which drives the second movable block 12 and the first movable block 9 to move downward. A portion of the water flows through the water channel 11 and into the floating cavity 7 and the water flow channel 8, flushing the impurities blocked by the filter plug 16 back into the washing machine. When the impact of the water flow is large enough, the first elastic element 13 is compressed, and the second movable block 12 continues to move downward, driving the second water baffle 14 to block the water channel 11, so that the water no longer enters the floating cavity 7, but can only enter the outlet cavity 4 through the through hole 6 and be discharged from the outlet connector 20.

[0034] The beneficial effects of this utility model are:

[0035] When the water outlet stops flowing from the outlet chamber and the external water level is higher than that of the outlet chamber, the present invention automatically triggers a backflow blocking mechanism, which can effectively prevent water from flowing back into the inner cavity.

[0036] The filter plug can prevent impurities from entering the floating chamber in a backflow-proof state.

[0037] During the water inlet impact process, some of the water flow will wash the front end of the filter plug and carry impurities back into the equipment, achieving a certain self-cleaning effect and extending the service life of the device.

[0038] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A backflow prevention faucet, comprising a faucet body (1) and an inner cavity (2) disposed within the faucet body (1), wherein one end of the inner cavity (2) is provided with a water inlet cavity (3) and the other end is provided with a water outlet cavity (4), characterized in that: An anti-backflow assembly is provided between the inner cavity (2) and the outlet cavity (4). The anti-backflow assembly includes an anti-backflow connector (5) connected to the faucet body (1). The anti-backflow connector (5) has a through hole (6). The inner cavity (2) communicates with the outlet cavity (4) through the through hole (6). A floating cavity (7) is provided inside the anti-backflow connector (5). A water flow channel (8) communicating with the outside is provided on the anti-backflow connector (5). The water flow channel (8) communicates with the floating cavity (7). A movable first movable block (9) is provided inside the floating cavity (7). A first water-blocking part (10) is provided on the first movable block (9). The water-blocking part (10) is provided with a water passage groove (11), and the inner cavity (2) is connected to the floating cavity (7) through the water passage groove (11). The first movable block (9) is provided with a movable second movable block (12), and a first elastic member (13) is provided between the second movable block (12) and the first movable block (9). The second movable block (12) is provided with a second water-blocking part (14), which is located above the water passage groove (11). The inner cavity (2) is provided with a step part (15), and the second water-blocking part (14) is used to abut against the step part (15) under the action of backflow water to prevent water from entering the inner cavity (2).

2. The anti-backflow faucet according to claim 1, characterized in that: The water flow channel (8) is equipped with a filter plug (16).

3. The anti-backflow faucet according to claim 1, characterized in that: The second water-blocking part (14) is provided with a guide slope (17).

4. The anti-backflow faucet according to claim 2, characterized in that: The first movable block (9) is provided with a movable groove (18), the first elastic element (13) is disposed in the movable groove (18), the second movable block (12) is provided with a limiting block (19), the limiting block (19) is disposed in the movable groove (18), one end of the first elastic element (13) abuts against the limiting block (19), and the other end abuts against the bottom of the movable groove (18).

5. The anti-backflow faucet according to claim 1, characterized in that: The anti-backflow connector (5) is connected to a water outlet connector (20), and the water outlet cavity (4) is located inside the water outlet connector (20). A sealing ring (21) is provided between the first water-blocking part (10) and the anti-backflow connector (5).

6. The anti-backflow faucet according to claim 3, characterized in that: The first active block (9) is a triangular prism structure.

7. The anti-backflow faucet according to claim 1, characterized in that: A control valve assembly for controlling the opening and closing of the water inlet is provided between the water inlet chamber (3) and the inner chamber (2).

8. The anti-backflow faucet according to claim 7, characterized in that: The control valve assembly includes a valve body (22) connected to the water nozzle body (1), an upper valve core (23) is internally threaded onto the valve body (22), a movable lower valve core (24) is connected to the upper valve core (23), and the lower valve core (24) is disposed between the water inlet chamber (3) and the inner chamber (2) to control the flow of water.

9. A backflow prevention faucet according to claim 8, characterized in that: The upper valve core (23) is provided with a slot (25), and the lower valve core (24) is inserted into the slot (25). The slot (25) is also provided with a second elastic member (26), one end of which abuts against the upper valve core (23) and the other end of which abuts against the lower valve core (24).

10. A backflow prevention faucet according to claim 8, characterized in that: The upper valve core (23) is provided with a handle (27).

Images