Water inlet connector with backflow prevention function

Abstract

The utility model relates to a water inlet connector with an anti-backflow function, which comprises a connector body, a connector inner groove is arranged in the connector body, an anti-backflow component is arranged in the connector inner groove, one end of the connector body is provided with a threaded boss, and the threaded boss is detachably connected to one end of a filter. The connector inner groove is formed in the connector body, and the anti-backflow assembly is installed in the connector inner groove, so that the installation structural design does not occupy the inner space of a pre-filter in the market, only the connector at one end of the filter is adjusted, and integration and effective utilization of the space structure are facilitated; and convenience is brought to design and use.

Description

Technical Field

[0001] The utility model relates to the technical field of water connectors, and particularly relates to a water inlet connector with a reverse flow prevention function. Background Art

[0002] A pre-filter is the first stage of coarse filtration equipment before the water enters the washing machine, which can filter large particulate matters such as sediment, rust, insect eggs, and bloodworms in tap water. The pre-filter is generally installed at the front end of the pipeline, so it is named with the word "pre"; and "filtering" refers to the basic principle of such equipment. The water inlet end of the vast majority of filters has an end cap, and this end cap is often only used to connect the water inlet pipeline.

[0003] The application publication number is CN104775286A, which discloses a filtering device for a washing machine and a washing machine having the same. Combining its specification and drawings, the solution is that the housing is provided with a water inlet quick-connect joint communicated with the water inlet and a water outlet quick-connect joint communicated with the water outlet. The water inlet quick-connect joint can facilitate the connection between the filtering device and the faucet, and the water outlet quick-connect joint can facilitate the connection between the filtering device and the water inlet pipe of the washing machine. However, the water outlet quick-connect joint can only function as connecting the water pipes. If there is no other space inside the entire housing to install a reverse flow prevention element, the entire filtering device does not have the function of preventing reverse flow, which brings inconvenience during use. Summary of the Invention

[0004] The utility model mainly aims at the problems existing in the use of water connectors, and invents a water inlet connector with a reverse flow prevention function. The inside of the connector body is provided with a connector inner groove, and the reverse flow prevention component is installed inside the connector inner groove. Such an installation structure design does not occupy the internal space of the pre-filter. For ordinary pre-filters on the market that do not have the function of preventing reverse flow, only by installing the connector body and the reverse flow prevention component of this solution at its water inlet end, the ordinary pre-filter can be made to have the function of preventing reverse flow.

[0005] The invention object of the utility model is realized through the following technical solutions: a water inlet connector with a reverse flow prevention function, including a connector body, the inside of the connector body is provided with a connector inner groove, the inside of the connector inner groove is provided with a reverse flow prevention component, and one end of the connector body is provided with a threaded boss, and the threaded boss is detachably connected to one end of the filter.

[0006] Preferably, the other end of the connector body is provided with a threaded inner groove, and the threaded inner groove is detachably connected to an external water inlet pipeline.

[0007] Preferably, the other end of the joint body extends outwardly to form a joint boss. The middle part of the joint boss is a through hole. A plurality of limiting through holes are formed through the side surface of the joint boss. A limiting sphere is slidably arranged inside each limiting through hole. The diameter of one side of the limiting through hole close to the joint body is smaller than the diameter of the limiting sphere. A joint housing is sleeved outside the joint boss, and the joint housing can prevent the limiting sphere from falling outside.

[0008] Preferably, a plurality of arc-shaped bosses are arranged on the surface of the joint body. A plurality of inner housing grooves adapted to the arc-shaped bosses are arranged on the inner side of the joint housing, and the inner housing grooves are connected to the inside of the arc-shaped bosses.

[0009] Preferably, a ring-shaped limiting boss is arranged on the inner side of the joint housing, and a first metal spring is arranged between the ring-shaped limiting boss and the joint body.

[0010] Preferably, a rubber ring is arranged inside the joint boss. This setting is to enable a certain sealing function when an external pipeline is inserted into the inside of the joint boss.

[0011] Preferably, the anti-backflow component includes an anti-backflow housing, an anti-backflow baffle, a support column body and a second metal spring. A water flow through hole is formed in the middle of the anti-backflow housing. A guiding slide rod is arranged on the surface of the anti-backflow baffle, and the guiding slide rod is slidably connected to the anti-backflow housing.

[0012] Preferably, a plurality of support column bodies are arranged on the anti-backflow housing towards the center direction. An annular sliding groove is arranged at the end of the support column body, and the guiding slide rod is slidably connected to the annular sliding groove. A second metal spring is arranged between the anti-backflow baffle and the support column body. This structural setting is to enable the guiding slide rod to be slidably connected to the anti-backflow housing.

[0013] Compared with the prior art, the present utility model has the following beneficial effects: 1. A joint inner groove is arranged inside the joint body, and the anti-backflow component is installed inside the joint inner groove. Such an installation structure design does not occupy the internal space of the pre-filter, but only adjusts the joint at one end of the filter, which is beneficial to integration and effectively utilizes the space structure, bringing convenience for design and use; 2. For ordinary pre-filters on the market that do not have the function of preventing backflow, only by installing the joint body and the anti-backflow component of this solution at its water inlet end, the ordinary pre-filter can be made to have the function of preventing backflow, bringing convenience for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a perspective view of the first embodiment of the present utility model;

[0015] Figure 2 is a cross-sectional view of the first embodiment of the present utility model;

[0016] Figure 3 Is a perspective view of the second embodiment of the present utility model;

[0017] Figure 4 Is a cross-sectional view of the second embodiment of the present utility model;

[0018] Figure 5 Is an exploded cross-sectional view of the second embodiment of the present utility model.

[0019] Reference numerals in the figure: 1, joint body; 11, inner joint groove; 12, threaded boss; 13, internal threaded groove; 14, arc-shaped boss; 2, anti-backflow assembly; 21, anti-backflow housing; 22, water flow through hole; 23, anti-backflow baffle; 24, guiding slide bar; 25, support column; 26, annular sliding groove; 27, second metal spring; 3, joint boss; 31, limiting through hole; 32, limiting sphere; 4, joint housing; 41, inner housing groove; 42, annular limiting boss; 43, first metal spring; 5, rubber ring. Detailed implementation manners

[0020] The present utility model will be further described below in conjunction with the embodiments shown in the drawings:

[0021] As Figures 1 to 2As shown, a water inlet joint with a backflow prevention function, the first embodiment of the present utility model, includes a joint body 1. An inner joint groove 11 is provided inside the joint body 1. A backflow prevention assembly 2 is provided inside the inner joint groove 11. A threaded boss 12 is provided at one end of the joint body 1. The threaded boss 12 is detachably connected to one end of an external filter. A threaded inner groove 13 is provided at the other end of the joint body 1. The threaded inner groove 13 is detachably connected to an external water inlet pipeline. After such a setting, external water can flow in through the threaded inner groove 13 and flow out through the backflow prevention assembly 2. The backflow prevention assembly 2 includes a backflow prevention housing 21, a backflow prevention baffle 23, a support column body 25, and a second metal spring 27. A water flow through hole 22 is provided in the middle of the backflow prevention housing 21. A guiding slide bar 24 is provided on the surface of the backflow prevention baffle 23. The guiding slide bar 24 is slidably connected to the backflow prevention housing 21. A plurality of support column bodies 25 are provided on the backflow prevention housing 21 in the direction towards the center. An annular chute 26 is provided at the end of the support column body 25. The guiding slide bar 24 is slidably connected to the annular chute 26. A second metal spring 27 is provided between the backflow prevention baffle 23 and the support column body 25. When water flows in through the threaded inner groove 13 and reaches the surface of the backflow prevention baffle 23, the water will impact the backflow prevention baffle 23 until the second metal spring 27 starts to compress. The guiding slide bar 24 slides inside the annular chute 26, and the gap between the backflow prevention baffle 23 and the water flow through hole 22 will become larger, allowing the water to flow downward normally. However, when the water flows back, the water will also impact the backflow prevention baffle 23, and the guiding slide bar 24 slides upward inside the annular chute 26, and the gap between the backflow prevention baffle 23 and the water flow through hole 22 will disappear. In this process, the second metal spring 27 plays a guiding role.

[0022] As Figures 3 to 5As shown in the figure, in the second embodiment of the present utility model, different from the first embodiment, the threaded inner groove 13 at the top of the joint body 1 is replaced by a joint boss 3 extending outwards, and the middle of the joint boss 3 is a through hole. A number of limiting through holes 31 are provided through the side of the joint boss 3. A limiting sphere 32 is slidably arranged inside each limiting through hole 31. The diameter of the side of the limiting through hole 31 close to the joint body 1 is smaller than the diameter of the limiting sphere 32. A joint housing 4 is sleeved outside the joint boss 3, and the joint housing 4 can prevent the limiting sphere 32 from falling outside. A number of arc-shaped bosses 14 are provided on the surface of the joint body 1. A number of inner housing grooves 41 adapted to the arc-shaped bosses 14 are provided on the inner side of the joint housing 4. The inner housing grooves 41 are connected to the inside of the arc-shaped bosses 14. A ring-shaped limiting boss 42 is provided on the inner side of the joint housing 4. A first metal spring 43 is provided between the ring-shaped limiting boss 42 and the joint body 1. A rubber ring 5 is provided inside the joint boss 3. After such a setting, it is possible to connect a water pipe without an external thread outside. First, it is necessary to press down the joint housing 4, and the first metal spring 43 gradually deforms, so that the limiting sphere 32 has a certain space for movement inside the limiting through hole 31. Then, an external pipeline is inserted into the rubber ring 5. When the joint housing 4 is released, the elastic force of the first metal spring 43 drives the joint housing 4 to slowly reset until the restriction on the limiting sphere 32 is restored, so that the limiting sphere 32 squeezes the outer wall of the pipeline and makes it not easy to break away.

[0023] Working principle and usage method of the present utility model:

[0024] For installing the water inlet pipeline in the first embodiment, it is detachably connected to the external water inlet pipeline by using the threaded inner groove 13, and the external water can flow in through the threaded inner groove 13 and flow out through the anti-backflow component 2;

[0025] For installing the water inlet pipeline in the second embodiment, press down the joint housing 4, and the first metal spring 43 gradually deforms, so that the limiting sphere 32 has a certain space for movement inside the limiting through hole 31. Then, an external pipeline is inserted into the rubber ring 5. When the joint housing 4 is released, the elastic force of the first metal spring 43 drives the joint housing 4 to slowly reset until the restriction on the limiting sphere 32 is restored, so that the limiting sphere 32 squeezes the outer wall of the pipeline and makes it not easy to break away. The external water can flow in through the joint boss 3 and flow out through the anti-backflow component 2;

[0026] For the anti-backflow component 2, when water flows onto the surface of the anti-backflow baffle 23, the water will impact the anti-backflow baffle 23 until the second metal spring 27 starts to compress. The guiding slide rod 24 slides inside the annular chute 26, and the gap between the anti-backflow baffle 23 and the water flow through-hole 22 will become larger, allowing the water to flow downward normally. However, when the water flows back, the water will also impact the anti-backflow baffle 23, and the guiding slide rod 24 slides upward inside the annular chute 26, and the gap between the anti-backflow baffle 23 and the water flow through-hole 22 will disappear. In this process, the second metal spring 27 plays a guiding role.

[0027] 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 substitute, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An inlet joint with a backflow prevention function, comprising a joint body (1), characterized in that, Inside the joint body (1), there is a joint inner groove (11). Inside the joint inner groove (11), there is a backflow prevention component (2). One end of the joint body (1) is provided with a threaded boss (12), and the threaded boss (12) is detachably connected to one end of the filter.

2. The water inlet joint with anti-backflow function according to claim 1, characterized in that, The other end of the joint body (1) is provided with a threaded inner groove (13), and the threaded inner groove (13) is detachably connected to the external water inlet pipeline.

3. The water inlet joint with anti-backflow function according to claim 1, characterized in that, The other end of the joint body (1) extends outward to form a joint boss (3). The middle of the joint boss (3) is a through hole. A number of limiting through holes (31) are provided through the side surface of the joint boss (3). Inside each limiting through hole (31), a limiting sphere (32) is slidably arranged. The diameter of the side of the limiting through hole (31) close to the joint body (1) is smaller than the diameter of the limiting sphere (32). The outside of the joint boss (3) is covered with a joint housing (4), and the joint housing (4) can prevent the limiting sphere (32) from falling outside.

4. The water inlet joint with a backflow prevention function according to claim 3, characterized in that, The surface of the joint body (1) is provided with a number of arc-shaped bosses (14). The inner side of the joint housing (4) is provided with a number of housing inner grooves (41) adapted to the arc-shaped bosses (14), and the housing inner grooves (41) are connected to the inside of the arc-shaped bosses (14).

5. The water inlet joint with anti-backflow function according to claim 4, characterized in that, The inner side of the joint housing (4) is provided with an annular limiting boss (42), and a first metal spring (43) is arranged between the annular limiting boss (42) and the joint body (1).

6. The water inlet joint with anti-backflow function according to claim 5, characterized in that, A rubber ring (5) is arranged inside the joint boss (3).

7. The water inlet joint with anti-backflow function according to claim 2 or claim 6, characterized in that, The backflow prevention component (2) includes a backflow prevention housing (21), a backflow prevention baffle (23), a support column body (25), and a second metal spring (27). A water flow through hole (22) is opened in the middle of the backflow prevention housing (21). A guiding slide bar (24) is arranged on the surface of the backflow prevention baffle (23), and the guiding slide bar (24) is slidably connected to the backflow prevention housing (21).

8. The water inlet joint with anti-backflow function according to claim 7, characterized in that, A number of support column bodies (25) are arranged in the direction towards the center of the backflow prevention housing (21). An annular sliding groove (26) is arranged at the end of the support column body (25), and the guiding slide bar (24) is slidably connected to the annular sliding groove (26). A second metal spring (27) is arranged between the backflow prevention baffle (23) and the support column body (25).

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