Water inlet connector capable of preventing backflow

Abstract

The utility model relates to a water inlet joint capable of preventing backflow, which comprises a joint body, a first waterway channel, a second waterway channel and a third waterway channel are arranged in the joint body, and the diameter of the first waterway channel is larger than that of the second waterway channel. A filtering assembly and a check valve assembly are arranged in the first water channel, a sealing assembly used for blocking the second water channel is further arranged in the second water channel, a pushing assembly used for pushing the sealing assembly to move up and down is arranged in the sealing assembly, and the third water channel is communicated with the second water channel; compared with a connector capable of controlling water outlet in a mechanical mode, the check valve assembly in the connector achieves the function that water cannot flow back from bottom to top, and convenience is brought to use.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, and particularly relates to a water inlet joint capable of preventing backflow. Background Art

[0002] In daily life, water pipes are usually used to transfer domestic water. At present, most of the water inlet pipes of household appliances are single-layer hoses. During use, the water inlet pipe is always connected to the tap water faucet, and the water source is completely cut off by the washing solenoid valve in the household appliance. Since there are multiple nodes and a long pipeline in the water pipe, it is inevitable that the water pipe will leak. If it is not detected and found in time, it will cause a large amount of water resource waste and irreversible damage to furniture, walls, floors, etc.

[0003] The authorized announcement number is CN207796362U, which discloses a mechanical safety water inlet pipe structure. Combining its specification and drawings, when the inner pipe ruptures and water flows into the outer flow channel, the expansion body swells when encountering water, and the expansion force overcomes the elastic force of the spring, causing the movable block to move downward. The second magnet repels the first magnet with the same polarity, the second magnet flips, and the first magnet is attracted by the second magnet, and the slider moves downward until the slider is embedded in the flared hole at the inlet end of the inner flow channel to seal, cutting off the water source. However, after using this structure, since there is no corresponding anti-backflow structure installed in its internal pipeline, after the water leaking from top to bottom is blocked, because the outer pipe or the inner pipe is still connected to the external water circuit, if the water in the external water circuit flows back, the water will flow back inside the water outlet end and impact the slider, bringing hidden dangers during use. Summary of the Invention

[0004] The utility model mainly aims at the problems existing in the use of the water inlet pipeline, and invents a water inlet joint capable of preventing backflow. For a joint that controls the water outlet in a mechanical manner, when the water inside passes through the valve body channel and flows downward, it will impact the valve body baffle, so that there is a gap between the valve body baffle and the valve body channel, and the water flows normally. However, when the water flows upward, the water will impact the valve body baffle until the gap between the valve body baffle and the valve body channel disappears, thus realizing that the water cannot flow back; the whole joint uses a mechanical structure to control the water flow inside the joint, that is, the position change of the columnar push rod is used to realize whether the third water channel allows water to pass through.

[0005] The object of the present utility model is achieved by the following technical solutions: A water inlet joint capable of preventing backflow, comprising a joint body. Inside the joint body, there are a first water channel, a second water channel, and a third water channel. The diameter of the first water channel is larger than that of the second water channel. Inside the first water channel, there are a filtering component and a check valve component. Inside the second water channel, there is also a sealing component for blocking the second water channel. Inside the sealing component, there is a pushing component for pushing it to move up and down. The third water channel is connected to the second water channel.

[0006] Preferably, a pipeline connection housing is also sleeved at the end of the first water channel. Inside the pipeline connection housing, there is an internal threaded groove. The first water channel is the water inlet, and the second water channel is the water outlet.

[0007] Preferably, the filtering component includes a spherical filter net and a sealing support ring. The edge of the spherical filter net is connected to the sealing support ring. The sealing support ring is arranged between the pipeline connection housing and the first water channel.

[0008] Preferably, the check valve component includes a check valve body and a check valve push rod. On the surface of the check valve body, there are several valve body channels. In the middle of the check valve body, there is a slidably connected check valve push rod. At the end of the check valve push rod, there is a valve body baffle, and the valve body baffle can fit against each valve body channel.

[0009] Preferably, the sealing component includes a sealing support block and a sealing silica gel ring. On the side of the sealing support block, there is a connected sealing silica gel ring. The sealing silica gel ring has a certain elasticity and fits against the second water channel. The pushing component is connected inside the sealing support block. This setting is to enable the sealing component to block the second water channel.

[0010] Preferably, the pushing component includes a columnar push rod and a metal spring. Inside the second water channel, there is a channel boss. Inside the channel boss, there are a first through hole and a second through hole. The diameter of the first through hole is larger than that of the second through hole. The diameter of the second through hole is adapted to the columnar push rod. The sealing support block is arranged at the end of the channel boss. Between the bottom of the sealing support block and the channel boss, there is a metal spring. The columnar push rod passes through the middle of the metal spring and is connected to the middle of the sealing support block.

[0011] Preferably, several anti-slip bosses are provided at the end of the third water channel. This setting is to facilitate the user's pipeline insertion at the end of the third water channel and prevent it from slipping easily, which brings convenience during installation.

[0012] Compared with the prior art, the utility model has the following beneficial effects: 1. For a joint with mechanical water outlet control, when the water inside it flows downward through the valve body channel, it will impact the valve body baffle, resulting in a gap between the valve body baffle and the valve body channel, and the water can flow normally. However, when the water flows upward, it will impact the valve body baffle until the gap between the valve body baffle and the valve body channel disappears, thus realizing the function of preventing water from flowing back upward, which brings convenience during use; 2. The entire joint uses a mechanical structure to control the water flow inside the joint, that is, the position change of the columnar push rod is used to realize whether the third water channel allows water to pass through. If you want to open the third water channel, just push the columnar push rod upward until the sealing silicone ring no longer fits with the third water channel, and vice versa. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a perspective view of the utility model;

[0014] Figure 2 is a cross-sectional view of the utility model;

[0015] Figure 3 is a cross-sectional view of the utility model after removing the pushing component;

[0016] Figure 4 is a cross-sectional view of the utility model when the water flow inside the joint body is normal.

[0017] Reference numerals in the figures: 1. Joint body; 11. First water channel; 12. Second water channel; 13. Third water channel; 14. Channel boss; 131. Anti-slip boss; 141. First through hole; 142. Second through hole; 2. Filter component; 21. Spherical filter net; 22. Sealing support ring; 3. Check valve component; 31. Check valve body; 32. Check valve push rod; 33. Valve body baffle; 34. Valve body channel; 4. Sealing component; 41. Sealing support block; 42. Sealing silicone ring; 5. Pushing component; 51. Columnar push rod; 52. Metal spring; 6. Pipeline connection housing; 61. Threaded inner groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following further describes the utility model with reference to the embodiments shown in the drawings:

[0019] As Figures 1 to 4As shown in the figure, an inlet joint capable of preventing backflow includes a joint body 1. Inside the joint body 1, there are a first water channel 11, a second water channel 12, and a third water channel 13. The diameter of the first water channel 11 is larger than that of the second water channel 12. Inside the first water channel 11, there are a filtering component 2 and a check valve component 3. At the end of the first water channel 11, there is also a pipeline connection housing 6 sleeved. Inside the pipeline connection housing 6, there is a threaded inner groove 61. The first water channel 11 is the water inlet, and the second water channel 12 is the water outlet. After such a setting, an external water inlet pipe can be connected to the inside of the threaded inner groove 61 in a threaded manner, which is convenient for disassembly and user installation. At the end of the third water channel 13, there are a number of anti-slip protrusions 131. This setting is to make it not easy for the user's pipeline to slip when inserted at the end of the third water channel 13, which brings convenience during installation.

[0020] In this embodiment, the filtering component 2 includes a spherical filter net 21 and a sealing support ring 22. The edge of the spherical filter net 21 is connected to the sealing support ring 22. The sealing support ring 22 is arranged between the pipeline connection housing 6 and the first water channel 11. The check valve component 3 includes a check valve body 31 and a check valve push rod 32. On the surface of the check valve body 31, there are a number of valve body channels 34. In the middle of the check valve body 31, there is a check valve push rod 32 that can slide. At the end of the check valve push rod 32, there is a valve body baffle 33. The valve body baffle 33 can fit each valve body channel 34. After such a setting, when external water flows from the inside of the pipeline connection housing 6 into the first water channel 11, it will first pass through the spherical filter net 21. The spherical filter net 21 can filter some larger particle debris. Then the water will flow into the inside of the second water channel 12 through the valve body channels 34. Of course, when the water flows downward inside the valve body channels 34, it will impact the valve body baffle 33, making there be a gap between the valve body baffle 33 and the valve body channels 34. However, when the water flows upward, it will impact the valve body baffle 33. The valve body baffle 33 drives the check valve push rod 32 to move upward until the gap between the valve body baffle 33 and the valve body channels 34 disappears. Thus, the function of preventing water from flowing back upward is realized.

[0021] In this embodiment, a sealing assembly 4 for blocking the second water channel 12 is further provided inside the second water channel 12. A pushing assembly 5 for pushing the sealing assembly 4 to move up and down is provided inside the sealing assembly 4. The third water channel 13 is communicated with the second water channel 12. The sealing assembly 4 includes a sealing support block 41 and a sealing silicone ring 42. The side of the sealing support block 41 is connected with the sealing silicone ring 42. The sealing silicone ring 42 has a certain elasticity and fits against the second water channel 12. The pushing assembly 5 is connected to the inside of the sealing support block 41. Specifically, the pushing assembly 5 includes a columnar push rod 51 and a metal spring 52. A channel boss 14 is provided inside the second water channel 12. A first through hole 141 and a second through hole 142 are provided inside the channel boss 14. The diameter of the first through hole 141 is larger than that of the second through hole 142. The diameter of the second through hole 142 is adapted to the columnar push rod 51. The sealing support block 41 is arranged at the end of the channel boss 14. A metal spring 52 is provided between the bottom of the sealing support block 41 and the channel boss 14. The columnar push rod 51 passes through the middle of the metal spring 52 and is connected to the middle of the sealing support block 41. After such a setting, this structure uses the position change of the columnar push rod 51 to realize whether the third water channel 13 allows water to pass through. If you want to open the third water channel 13, just push the columnar push rod 51 upward. During the pushing process, the metal spring 52 plays a role in supporting and guiding. The columnar push rod 51 will drive the sealing support block 41 to move upward until the sealing silicone ring 42 and the third water channel 13 are no longer in contact. At this time, there is a gap between the third water channel 13 and the sealing silicone ring 42, and the water inside the second water channel 12 can flow out from the third water channel 13.

[0022] Working principle and usage method of the utility model:

[0023] First, connect the external water inlet pipe to the inside of the internal thread groove 61 by threading. If you want to open the third water channel 13, just push up the columnar push rod 51. During the pushing process, the metal spring 52 plays a role in supporting and guiding. The columnar push rod 51 will drive the sealing support block 41 to move upward until there is no longer a fit between the sealing silicone rubber ring 42 and the third water channel 13. At this time, there is a gap between the third water channel 13 and the sealing silicone rubber ring 42, and the water inside the second water channel 12 can flow outwards from the third water channel 13. Then, when the external water flows into the first water channel 11 from the inside of the pipeline connection housing 6, it will first pass through the spherical filter net 21. The spherical filter net 21 can filter some larger particle debris. Then the water will flow into the inside of the second water channel 12 through the valve body channel 34. Of course, when the water flows downward through the inside of the valve body channel 34, it will impact the valve body baffle 33 so that there is a gap between the valve body baffle 33 and the valve body channel 34. However, when the water flows upward from bottom to top, the water will impact the valve body baffle 33, and the valve body baffle 33 will drive the check valve push rod 32 to move upward until the gap between the valve body baffle 33 and the valve body channel 34 disappears. Thus, the function of preventing the water from flowing back from bottom to top is achieved.

[0024] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A water inlet joint capable of preventing backflow, comprising a joint body (1), characterized in that: The joint body (1) is provided with a first water channel (11), a second water channel (12) and a third water channel (13) inside. The diameter of the first water channel (11) is larger than the diameter of the second water channel (12). A filter assembly (2) and a check valve assembly (3) are provided inside the first water channel (11). A sealing assembly (4) for blocking the second water channel (12) is also provided inside the second water channel (12). A pushing assembly (5) for pushing the sealing assembly (4) to move up and down is provided inside the sealing assembly (4). The third water channel (13) is connected to the second water channel (12).

2. The water inlet joint capable of preventing backflow according to claim 1, characterized in that: The end of the first water channel (11) is also sleeved with a pipe connection housing (6), the interior of the pipe connection housing (6) is provided with a threaded inner groove (61), the first water channel (11) is a water inlet, and the second water channel (12) is a water outlet.

3. The water inlet joint capable of preventing backflow according to claim 2, characterized in that: The filter assembly (2) comprises a spherical filter screen (21) and a sealing support ring (22); the edge of the spherical filter screen (21) is connected to the sealing support ring (22); and the sealing support ring (22) is arranged between the pipeline connection housing (6) and the first water channel (11).

4. The water inlet joint capable of preventing backflow according to claim 3, characterized in that: The check valve assembly (3) comprises a check valve body (31) and a check valve push rod (32); a plurality of valve body channels (34) are provided on the surface of the check valve body (31); a check valve push rod (32) is slidably connected to the middle of the check valve body (31); a valve body baffle (33) is provided at the end of the check valve push rod (32); and the valve body baffle (33) is capable of fitting in each valve body channel (34).

5. The water inlet joint capable of preventing backflow according to claim 4, characterized in that: The sealing component (4) comprises a sealing support block (41) and a sealing silicone ring (42); the sealing silicone ring (42) is connected to the side of the sealing support block (41); the sealing silicone ring (42) has a certain elasticity and fits the second water channel (12); and the pushing component (5) is connected to the inside of the sealing support block (41).

6. The water inlet joint capable of preventing backflow according to claim 5, characterized in that: The pushing assembly (5) comprises a columnar push rod (51) and a metal spring (52); a channel boss (14) is provided inside the second water channel (12); a first through hole (141) and a second through hole (142) are provided inside the channel boss (14); the diameter of the first through hole (141) is greater than the diameter of the second through hole (142); the diameter of the second through hole (142) is adapted to the columnar push rod (51); the sealing support block (41) is arranged at the end of the channel boss (14); a metal spring (52) is provided between the sealing support block (41) and the bottom of the channel boss (14); the columnar push rod (51) passes through the middle of the metal spring (52) and is connected to the middle of the sealing support block (41).

7. The water inlet joint capable of preventing backflow according to any one of claims 1 to 6, characterized in that: A plurality of anti-slip bosses (131) are provided at the end of the third water channel (13).

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