CN217683413U - Check valve and water tank - Google Patents

Abstract

The application provides a check valve and water tank, the water tank includes box, air pump and check valve. The method comprises the following steps: a valve seat having a passageway; the valve is arranged in the channel; the valve comprises an elastic diaphragm, the elastic diaphragm is provided with a first end and a second end which are oppositely arranged, the first end is connected with the valve seat in a sealing way, and the elastic diaphragm bends and extends from the first end to the second end and is provided with a concave side and a convex side; the second end of the elastic diaphragm is in interference abutment with the inner wall of the valve seat; the second end can be separated from the inner wall of the valve seat when the fluid pressure on the convex side reaches a preset value; the second end is capable of abutting against an inner wall of the valve seat under the pressure of the fluid on the concave side. The water tank of this application, through the setting of above-mentioned check valve, can reduce the condition of leaking.

Description

Check valve and water tank

Technical Field

The application belongs to the technical field of check valves, and more specifically relates to a check valve and a water tank.

Background

The water tank is used for storing water, and when water is drained, the air pump is needed to inflate the water tank, so that the water in the water tank is drained. The air pump needs to contact with the outside air, and when the air pump was out of work, the outside air can be in the water tank via the air pump, leads to the condition that leaks to appear in the water tank.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a check valve and a water tank, so as to solve the technical problem that water leakage is caused by air intake of the water tank in the prior art.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions: there is provided a one-way valve comprising:

a valve seat having a passage;

the valve is arranged in the channel; the valve comprises an elastic diaphragm, the elastic diaphragm is provided with a first end and a second end which are oppositely arranged, the first end is in sealing connection with the valve seat, and the elastic diaphragm bends and extends from the first end to the second end and is provided with a concave side and a convex side;

the second end of the elastic diaphragm is in interference abutment with the inner wall of the valve seat; the second end can be separated from the inner wall of the valve seat to communicate with the channel when the fluid pressure of the convex side reaches a preset value; the second end is capable of abutting against an inner wall of the valve seat under fluid pressure of the concave side to interrupt the passage.

In one possible design, the valve seat further has a first port and a second port, and the first port and the second port are respectively communicated with the channel;

the valve further comprises an installation seat, the installation seat is connected with the valve seat in a sealing mode, the installation seat is arranged opposite to the first interface, the first end of the elastic membrane is connected with the installation seat, the elastic membrane is arranged at one end, facing the installation seat, of the first interface in a surrounding mode, and the elastic membrane is arranged in a concave mode;

the second end is in interference abutment with the inner wall of the first connector surrounded by the valve seat so as to seal the first connector; the elastic diaphragm can be bent and deformed when the fluid pressure on the inner wall of the elastic diaphragm reaches a preset value so that the second end is separated from the inner wall of the valve seat; the elastic diaphragm can abut against the inner wall of the valve seat under the action of fluid pressure on the outer wall of the elastic diaphragm.

In one possible design, the radial cross section of the elastic diaphragm is a circular, elliptical, regular polygonal or irregular closed curve, and the radial cross section is an axial cross section perpendicular to the first port.

In one possible design, a center line of the elastic diaphragm coincides with a center line of the first port, and the first end inner diameter of the elastic diaphragm is larger than the inner diameter of the first port.

In one possible design, the inner diameter of the elastic diaphragm is gradually increased from the first end to the second end.

In one possible design, the inner wall of the valve seat extends to the passage with a mounting post, and the mounting seat has a socket which is in plug-fit with the mounting post.

In one possible design, the valve seat comprises:

the valve body is provided with a channel, a first interface and a second interface which are all formed in the valve body, and the valve body is also provided with a mounting port communicated with the channel;

the valve cover is detachably covered on the mounting opening, and the mounting column is formed on the valve cover.

In one possible design, the mounting seat and the elastic diaphragm are both made of soft rubber;

or the elastic membrane is made of soft rubber materials.

In one possible design, a first convex column is arranged on the outer wall of the valve seat in a protruding mode corresponding to the first interface, and the first convex column is communicated with the first interface;

the outer wall of the valve seat corresponds to the second connector and is provided with a second convex column in an outward protruding mode, and the second convex column is communicated with the second connector.

The application provides a check valve's beneficial effect lies in: compared with the prior art, the check valve of the embodiment of the application has the advantages that the elastic membrane is bent and extended from the first end to the second end and is provided with the concave side and the convex side; the second end of the elastic diaphragm is in interference abutment with the inner wall of the valve seat so as to cut off the channel; the second end can be separated from the inner wall of the valve seat when the fluid pressure of the convex side reaches a preset value so as to communicate with the channel; the second end is capable of abutting against an inner wall of the valve seat under the action of fluid pressure on the concave side to interrupt the passage. In other words, the check valve of this application, through elastic diaphragm's structural design for can open the valve port between elastic diaphragm and the disk seat through the fluid that the pressure that the convex side flowed in reaches the default, also can be through the fluid seal valve port that the concave side department flowed in simultaneously, need not other additional structures and assist, thereby make the simple structure of whole check valve, occupation space is little, can use in various equipment, for example be applicable to in the water tank in order to prevent that the water tank from leaking. In addition, the valve port needs to be opened when the fluid pressure reaches a preset value, so that the one-way valve can also be used as a switch.

On the other hand, the application also provides a water tank which comprises a tank body, an air pump and the one-way valve, wherein the air pump is connected with the tank body;

the one-way valve is arranged between the air pump and the box body;

or the one-way valve is arranged at the water outlet of the box body.

The application provides a water tank's beneficial effect lies in: compared with the prior art, the water tank of this application embodiment is through the setting of above-mentioned check valve to make during the gaseous unable box that gets into in the air pump, perhaps make the water in the box can't follow water outlet department and flow, thereby reach the condition that reduces the box and leak.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a check valve provided in an embodiment of the present application;

FIG. 2 is an exploded view of the check valve of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the check valve of FIG. 1;

FIG. 4 is a schematic view of the communication state of the check valve of FIG. 3;

FIG. 5 is a schematic view of the check valve of FIG. 3 in a closed state;

FIG. 6 is a schematic view of the valve seat of FIG. 2;

FIG. 7 is a schematic structural view of the valve of FIG. 2;

FIG. 8 is a schematic structural diagram of a water tank provided in an embodiment of the present application;

fig. 9 is a schematic structural diagram of a water tank according to another embodiment of the present application.

Wherein, in the figures, the various reference numbers:

1. a box body; 11. a liquid storage cavity; 12. a water filling port; 2. an air pump; 3. a one-way valve; 30. a valve seat; 31. a valve body; 311. a channel; 312. a first interface; 313. a second interface; 314. a first convex column; 3141. a first guide surface; 315. a second convex column; 3151. a second guide surface; 316. an installation port; 32. a valve cover; 321. a cover plate; 322. mounting a column; 323. a convex ring; 33. a valve; 331. an elastic diaphragm; 3311. a first end; 3312. a second end; 332. a mounting seat; 3321. a socket; 34. a valve port; 4. a first air pipe; 5. a second air pipe; 6. a first water pipe; 61. a first water inlet; 7. a water tank; 71. a shower nozzle; 8. a third air pipe; 9. a second water pipe; 91. a second water inlet; 10. and a third water pipe.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating 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 the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, a check valve 3 provided in an embodiment of the present application will now be described. The check valve 3 is used for the purpose of realizing one-way communication and stop of gas or liquid.

Referring to fig. 1 to 5, the check valve 3 includes a valve seat 30 and a valve 33, and the valve 33 is installed in the valve seat 30.

The valve seat 30 has a passage 311, a first port 312, and a second port 313. The first port 312 is communicated with the channel 311, that is, the channel 311 is connected with an external structure through the first port 312; the second port 313 communicates with the passage 311, i.e., the passage 311 is connected to an external structure through the second port 313.

Valve 33 is disposed in passage 311. The valve 33 includes an elastic diaphragm 331. Referring to fig. 3 and 7, the elastic diaphragm 331 has a first end 3311 and a second end 3312 opposite to each other, the first end 3311 is connected to the valve seat 30 in a sealing manner, and the elastic diaphragm 331 extends from the first end 3311 to the second end 3312 in a bending manner and has a concave side and a convex side. The concave side refers to a side of the elastic diaphragm 331 that is concave, and the convex side refers to a side of the elastic diaphragm 331 that is convex.

The second end 3312 of the elastic diaphragm 331 is in interference abutment with the inner wall of the valve seat 30 to disconnect the first port 312 from the second port 313, i.e. to disconnect the passage 311; the second end 3312 is capable of disengaging from the inner wall of the valve seat 30 when the fluid pressure on the convex side reaches a preset value to communicate the first port 312 with the second port 313, i.e., the communication passage 311; the second end 3312 is capable of abutting against the inner wall of the valve seat 30 under the influence of the fluid pressure on the concave side to block the first port 312 from communicating with the second port 313, i.e., to block the passage 311.

The preset value of the fluid pressure is a value set according to the elastic deformation capability of the elastic diaphragm 331, and the value is proportional to the elastic deformation capability of the elastic diaphragm 331. When the material and shape of the elastic diaphragm 331 are determined, the predetermined value is also determined, and the elastic diaphragm 331 can be deformed when the fluid pressure acting on the elastic diaphragm 331 is greater than the predetermined value.

It should be noted that, in the initial state, the elastic diaphragm 331 has elasticity, and the second end 3312 of the elastic diaphragm 331 is pressed against the inner wall of the valve seat 30 in an interference manner, so that the first port 312 is in the blocking state, and the first port 312 is disconnected from the second port 313; when the fluid flowing from the first port 312 impacts the convex side of the elastic diaphragm 331, the impact direction of the fluid is opposite to the bending tendency of the elastic diaphragm 331, so that when the liquid pressure reaches a preset value, the elastic diaphragm 331 can be further deformed, so that the second end 3312 of the elastic diaphragm 331 is separated from the inner wall of the valve seat 30, that is, a valve port 34 is formed between the second end 3312 of the elastic diaphragm 331 and the inner wall of the valve seat 30, and the first port 312 is communicated with the second port 313; when the fluid flowing into the second port 313 impacts the concave side of the elastic diaphragm 331, the impact direction of the fluid is opposite to the bending direction of the elastic diaphragm 331, and the elastic diaphragm 331 is expanded by the action of the fluid, so that the second end 3312 of the elastic diaphragm 331 is abutted against the inner wall of the valve seat 30 more tightly, the first port 312 is further sealed, and the first port 312 is disconnected from the second port 313.

In addition, the elastic diaphragm 331 can be deformed only when the fluid pressure reaches a predetermined value, and the elastic diaphragm 331 can be deformed without the fluid entering the first port 312. So that the check valve 3 also has a switching function.

In the check valve 3 provided in the embodiment of the present application, the valve 33 includes an elastic diaphragm 331, a first end 3311 of the elastic diaphragm 331 is connected to the valve seat 30 in a sealing manner, and the elastic diaphragm 331 bends and extends from the first end 3311 to the second end 3312 and has a concave side and a convex side; the second end 3312 of the elastic diaphragm 331 is in interference abutment with the inner wall of the valve seat 30 to disconnect the communication between the first port 312 and the second port 313; the second end 3312 is capable of disengaging from the inner wall of the valve seat 30 when the fluid pressure on the convex side reaches a preset value to communicate the first port 312 with the second port 313; the second end 3312 is capable of abutting against the inner wall of the valve seat 30 under the influence of the fluid pressure on the concave side to block the communication of the first port 312 with the second port 313. In other words, the check valve 3 of the present application, through the structural design of the elastic diaphragm 331, enables the fluid that can flow in through the first port 312 and whose pressure reaches the preset value to open the valve port 34 between the elastic diaphragm 331 and the valve seat 30, and simultaneously can also seal the valve port 34 through the fluid that flows in through the second port 313, without the assistance of other additional structures, thereby making the structure of the whole check valve 3 simple, occupying small space, and being applicable to various devices, for example, being applicable to a water tank to prevent water leakage from the water tank. In addition, the valve port 34 needs to be opened when the fluid pressure reaches a preset value, so that the check valve 3 can also be used as a switch.

In one embodiment, referring to fig. 3-7, the valve 33 further includes a mounting seat 332, and the mounting seat 332 is disposed in the passage 311 and is sealingly connected to the valve seat 30. Referring to fig. 3 and 7, the first end 3311 of the elastic diaphragm 331 is connected to the mounting base 332. The mounting seat 332 is arranged opposite to the first interface 312, the elastic diaphragm 331 is arranged around one end of the first interface 312 facing the mounting seat 332, and the elastic diaphragm 331 is arranged in a concave manner; the second end 3312 is in interference fit with an inner wall of the valve seat 30 surrounding the first port 312 to block the first port 312; the elastic diaphragm 331 can be bent and deformed when the fluid pressure on the inner wall thereof reaches a preset value to disengage the second end 3312 from the inner wall of the valve seat 30; the elastic diaphragm 331 can abut against the inner wall of the valve seat 30 under the action of fluid pressure on the outer wall thereof. In this embodiment, the elastic diaphragm 331 is arranged in a circumferentially closed structure and arranged around one end of the first port 312, so as to close the first port 312. It is understood that in other embodiments of the present application, the elastic diaphragm 331 may be disposed in the first port 312 to seal the first port 312. Alternatively, when the passage of the valve seat 30 is a square structure, the elastic diaphragm 331 may be configured to be a non-closed structure, and the elastic diaphragm 331 abuts against different side inner walls of the valve seat 30 to divide the passage 311 into two chambers disposed at intervals, so as to disconnect the first port 312 from the second port 313, which is not limited herein.

In one embodiment, referring to fig. 2, the first port 312 is a circular port, and the radial cross section of the elastic diaphragm 331 is circular, wherein the radial cross section is an axial cross section perpendicular to the first port 312. Therefore, the elastic diaphragm 331 has a regular shape, which is beneficial to forming, and is matched with the shape of the first port 312, which is beneficial to the flow of the fluid. It is understood that in other embodiments of the present application, the radial cross section of the elastic diaphragm 331 may be an ellipse, a regular polygon or an irregular closed curve. The regular polygon can be a square, a rectangle, a rhombus, or the like.

In one embodiment, referring to fig. 3, a center line of the elastic diaphragm 331 is coincident with a center line of the first port 312, and an inner diameter of the first end 3311 of the elastic diaphragm 331 is larger than an inner diameter of the first port 312. In other words, the mounting seat 332 is opposite to the first port 312 and is disposed at an interval, a flow channel is formed between the mounting seat 332 and the first port 312 at an interval, and the fluid entering from the first port 312 firstly passes through the flow channel and then respectively flows through a circle of the elastic diaphragm 331 along the circumferential direction. Through the structural design, the flow path of the fluid from the first interface 312 to the elastic diaphragm 331 is increased, so that the flow channel speed of the fluid can be reduced, the impact force of the fluid on the elastic diaphragm 331 is reduced, and the elastic diaphragm 331 is prevented from being damaged due to the fact that the fluid speed is too high.

It is understood that in other embodiments of the present application, the center line of the elastic diaphragm 331 may not be coincident with the center line of the first port 312, and the inner diameter of the first end 3311 of the elastic diaphragm 331 may be smaller than or equal to the inner diameter of the first port 312, which is not limited herein.

In one embodiment, the inner diameter of the elastic diaphragm 331 increases from the first end 3311 to the second end 3312, i.e., the closer the elastic diaphragm 331 is to the second end 3312, the greater the degree of outward bending thereof, so that the fluid entering from the first port 312 can impact and continue to bend the second end 3312 of the elastic diaphragm 331, thereby separating the elastic diaphragm 331 from the inner wall of the valve seat 30. It is understood that in other embodiments of the present application, the inner diameter of the elastic diaphragm 331 may also be a trend of larger ends and smaller middle, and is not limited herein.

In one embodiment, referring to fig. 3, the mounting post 322 extends from the inner wall of the valve seat 30 to the passage 311, and the mounting seat 332 is disposed on the mounting post 322. During installation, the installation seat 332 of the valve 33 is only required to be sleeved on the installation post 322, and the periphery of the second end 3312 of the elastic diaphragm 331 abuts against the inner wall of the valve seat 30.

Specifically, the inner wall of the valve seat 30 facing the first port 312 extends toward the first port 312 to form an installation post 322, the installation seat 332 is a cylindrical post, one end of the installation seat 332 facing away from the elastic diaphragm 331 is provided with a socket 3321, and the socket 3321 is in plugging fit with the installation post 322, so that the installation of the installation seat 332 is realized.

Referring to fig. 2, 3 and 6, the valve seat 30 includes a valve body 31 and a valve cover 32. The passage 311, the first port 312, and the second port 313 are formed in the valve body 31, and the valve body 31 further has a mounting port 316 communicating with the passage 311. The valve cover 32 is detachably mounted to the mounting opening 316, and the mounting post 322 is formed on the valve cover 32.

When the check valve 3 of the present application is installed, the mounting seat 332 of the valve 33 is firstly sleeved on the mounting post 322 of the valve cap 32, the valve cap 32 is installed at the mounting opening 316 of the valve body 31, and the periphery of the second end 3312 of the elastic diaphragm 331 abuts against the inner wall of the valve body 31, so that the assembly of the check valve 3 can be completed. When the valve is disassembled, the valve 33 can be disassembled and maintained and replaced only by opening the valve cover 32, and the valve is convenient to disassemble and assemble and convenient to maintain.

Alternatively, the valve body 31 has a cylindrical shape, the first port 312 and the mounting port 316 are respectively provided at both ends of the valve body 31 in the axial direction, and the second port 313 is provided on any side wall of the valve body 31 in the circumferential direction and is provided near the mounting port 316. So set up, do benefit to the installation of valve gap 32 and valve 33 along axial direction. It is understood that in other embodiments of the present application, when the diameter of the valve body 31 is large enough, the second port 313 and the mounting port 316 can be arranged on the same side; the valve body 31 may have a square shape, which is not limited herein.

Referring to fig. 3, the valve cap 32 includes a cover plate 321 and a mounting post 322, the cover plate 321 covers the mounting opening 316 and stops at an outer end surface of the mounting opening 316, and the mounting post 322 extends linearly from the cover plate 321 to the mounting base 332.

A convex ring 323 is convexly arranged on one side of the cover plate 321 facing the valve body 31, the convex ring 323 is arranged around the mounting column 322, and a step is formed between the outer wall of the convex ring 323 and the cover plate 321. When the valve is installed, one end of the valve body 31 facing the cover plate 321 is sleeved outside the convex ring 323 and abuts against the step, so that the valve cover 32 is connected with the valve body 31.

The convex ring 323, the cover plate 321 and the mounting post 322 are in an integral connecting structure, so that the valve cover 32 is simple to manufacture and assemble.

The cover 321 and the valve body 31 can be connected by a sealing ring to prevent the fluid from flowing out of the mounting port 316.

Referring to fig. 3, the outer diameter of the cover plate 321 is equal to the outer diameter of the valve body 31, that is, the outer peripheral wall of the cover plate 321 is flush with the outer peripheral wall of the valve body 31, so that the assembled check valve 3 has a flush and beautiful appearance.

In one embodiment, the mounting seat 332 is integrally formed with the elastomeric diaphragm 331, thereby simplifying manufacture of the valve 33 and also sealing the connection between the mounting seat 332 and the elastomeric diaphragm 331 from fluid flow out of the connection between the mounting seat 332 and the elastomeric diaphragm 331.

The mounting seat 332 and the elastic diaphragm 331 are made of soft rubber. The soft glue is formed by plastic through injection molding, is called as soft glue by many people with softer hand feeling at normal temperature, but does not need to be subjected to vulcanization treatment. The flexible glue not only can be deformed under the action of external force, but also can form a sealing effect, such as a sealing ring, by abutting against an external structure. This application makes valve 33 through the flexible glue to make when elastic diaphragm 331 supports tightly with the inner wall of valve seat 30, be sealing connection between elastic diaphragm 331 and the valve seat 30, thereby prevent that fluid from flowing through between elastic diaphragm 331 and the valve seat 30.

Alternatively, the mounting seat 332 and the elastic diaphragm 331 may be made of soft rubber such as rubber, silica gel, and silicon rubber.

It should be understood that, in other embodiments of the present application, the mounting seat 332 and the elastic diaphragm 331 may also be formed separately, for example, the mounting seat 332 and the elastic diaphragm 331 are integrally connected by a secondary injection molding after being formed separately, and can also form a sealed connection, or the mounting seat 332 and the elastic diaphragm 331 are fixedly connected by pressing, adhering, or riveting, and the material of the mounting seat 332 and the material of the elastic diaphragm 331 may be different, for example, the elastic diaphragm 331 may be made of a soft rubber material; the mounting seat 332 may be made of a soft rubber material, or may be made of a hard plastic material, which is not limited herein.

In one embodiment, referring to fig. 1 and 6, a first protrusion 314 is protruded from the outer wall of the valve seat 30 corresponding to the first port 312, and the first protrusion 314 is connected to the first port 312. Similarly, a second convex column 315 is convexly arranged on the outer wall of the valve seat 30 corresponding to the second port 313, and the second convex column 315 is communicated with the second port 313.

When the check valve 3 is connected with an external pipeline, the first convex column 314 and the second convex column 315 can be respectively inserted into different external pipelines, so that the first connector 312 and the second connector 313 can be respectively communicated with the external pipeline, and the disassembly, assembly and replacement of the check valve 3 in the pipelines are facilitated.

Referring to fig. 1 and 6, a first guiding surface 3141 is disposed on an outer wall of an end of the first convex cylinder 314 away from the first port 312, the first guiding surface 3141 is conical, and an outer diameter of the first guiding surface 3141 gradually increases in a direction approaching the first port 312, so that the first convex cylinder 314 can be guided by the first guiding surface 3141 to be inserted into an external pipe.

Likewise, the outer wall of the end of the second boss 315 remote from the second port 313 is provided with a second guiding surface 3151, the second guiding surface 3151 is conical, and the outer diameter of the second guiding surface 3151 gradually increases in the direction approaching the second port 313, so that the second boss 315 can be guided by the second guiding surface 3151 to be inserted into the external pipe.

On the other hand, the application provides a water tank, including box 1, air pump 2 and above-mentioned check valve 3. The tank body 1 is provided with a liquid storage cavity 11 for storing liquid, and the air pump 2 is installed outside the tank body 1 and used for inflating the liquid storage cavity 11 so as to discharge the liquid in the liquid storage cavity 11 outwards. The one-way valve 3 is connected between the air pump 2 and the box body 1; alternatively, the check valve 3 is installed at the water outlet of the tank 1.

In one embodiment, referring to fig. 8, the check valve 3 is connected between the air pump 2 and the box body 1, specifically, the first port 312 of the check valve 3 is connected to the air pump 2, and the second port 313 of the check valve 3 is connected to the box body 1.

When the air pump 2 works, the air pump 2 sucks external air and fills the air into the channel 311 of the one-way valve 3 through the first port 312, because the air pump 2 works to make the air have a certain flow rate, when the impact pressure of the air on the elastic diaphragm 331 is greater than a preset value, the second end 3312 of the elastic diaphragm 331 is separated from the inner wall of the valve seat 30, the air enters the tank 1 through the valve port 34 and the second port 313, and thus the liquid in the tank 1 is discharged outwards.

When the air pump 2 is out of work, the air pump 2 is communicated with the outside air, the outside air enters the first interface 312 through the air pump 2, however, because the air pump 2 is out of work, the flow rate of the air is slow, the impact pressure of the air on the elastic diaphragm 331 is not enough to enable the elastic diaphragm 331 to deform, so that the elastic diaphragm 331 cannot be separated from the inner wall of the valve seat 30, the air cannot enter the box body 1 through the one-way valve 3, and the water leakage phenomenon cannot occur in the box body 1 when the air pump 2 is out of work.

Specifically, referring to fig. 8, the box body 1 further includes a first air tube 4 and a second air tube 5, the first air tube 4 is connected between the air pump 2 and the first interface 312, one end of the second air tube 5 is connected with the second interface 313, and the other end of the second air tube 5 extends to the bottom of the liquid storage cavity 11, so that air can be led to the bottom of the liquid storage cavity 11 to discharge liquid.

Referring to fig. 8, a water filling opening 12 is formed in the top of the box 1, a water tank 7 and a first water pipe 6 are further formed in the bottom of the box 1, a first water inlet 61 of the first water pipe 6 is communicated with the box 1, the other end of the first water pipe 6 is communicated with the water tank 7, a plurality of shower openings 71 are distributed on the water tank 7, and water in the box 1 is discharged through the shower openings 71.

According to the box body 1 provided by the embodiment of the application, through the arrangement of the one-way valve 3, the one-way valve 3 can be used as a one-way switch between the air pump 2 and the box body 1, so that air in the operation of the air pump 2 can enter the box body 1 through the one-way valve 3, but liquid in the box body 1 cannot enter the air pump 2 through the one-way valve 3, and the air pump 2 is prevented from being corroded; meanwhile, when the air pump 2 does not work, the one-way valve 3 can also prevent the air in the air pump 2 from entering the box body 1, and water leakage of the box body 1 is prevented.

In another embodiment of the present application, please refer to fig. 9, the air pump 2 is connected to the tank 1 through the third air tube 8, the check valve 3 is installed at the water outlet of the tank 1, specifically, the first port 312 of the check valve 3 is connected to the water outlet, the second port 313 is communicated with the outside, when the air pump 2 works, the air in the air pump 2 enters the liquid storage cavity 11, so that the liquid in the liquid storage cavity 11 flows through the check valve 3 at a certain flow rate, and the check valve 3 can be opened. When the air pump 2 does not work, although air enters the liquid storage cavity 11 in the air pump 2, the flow rate of the air is small, so that the flow rate of the liquid flowing through the one-way valve 3 in the liquid storage cavity 11 is also small, the one-way valve 3 cannot be opened by the liquid, and the liquid cannot flow out.

Referring to fig. 9, the water tank further includes a second water pipe 9 and a third water pipe 10, a second water inlet 91 of the second water pipe 9 is connected to the tank body 1, a first port 312 of the check valve 3 is connected to the other end of the second water pipe 9, one end of the third water pipe 10 is connected to a second port 313 of the check valve 3, and the other end of the third water pipe 10 is used for discharging water.

Referring to fig. 9, the other end of the third water pipe 10 is connected to the water tank 7. The liquid in the tank 1 enters the water tank 7 through the second water pipe 9, the check valve 3 and the third water pipe 10, and is sprayed out through the plurality of shower ports 71.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A non-return valve (3), characterized in that it comprises:

a valve seat (30), the valve seat (30) having a passage (311);

the valve (33), the valve (33) includes an elastic diaphragm (331), the elastic diaphragm (331) has a first end (3311) and a second end (3312) which are oppositely arranged, the first end (3311) is connected with the inner wall of the valve seat (30) in a sealing way, the elastic diaphragm (331) is bent and extended from the first end (3311) to the second end (3312) and has a concave side and a convex side;

-said second end (3312) of said elastic diaphragm (331) is in interference abutment with an inner wall of said valve seat (30); the second end (3312) is capable of disengaging from the inner wall of the valve seat (30) to communicate with the passage (311) when the fluid pressure on the convex side reaches a preset value; the second end (3312) is adapted to abut against an inner wall of the valve seat (30) under the influence of the fluid pressure on the concave side to close the passage (311).

2. The non-return valve (3) according to claim 1, characterised in that the seat (30) also has a first port (312) and a second port (313), the first port (312) and the second port (313) communicating with the passage (311), respectively;

the valve (33) further comprises a mounting seat (332), the mounting seat (332) is connected with the valve seat (30) in a sealing mode, the mounting seat (332) is arranged opposite to the first interface (312), a first end (3311) of the elastic diaphragm (331) is connected with the mounting seat (332), the elastic diaphragm (331) is arranged around one end, facing the mounting seat (332), of the first interface (312), and the elastic diaphragm (331) is arranged in a concave mode;

the second end (3312) is in interference abutment with an inner wall of the valve seat (30) surrounding the first port (312) to block the first port (312); the elastic diaphragm (331) is capable of bending and deforming when the fluid pressure on its inner wall reaches a preset value so as to make the second end (3312) disengage from the inner wall of the valve seat (30); the elastic diaphragm (331) can be pressed against the inner wall of the valve seat (30) by the fluid pressure on the outer wall thereof.

3. The non-return valve (3) according to claim 2, characterised in that the radial section of the elastic diaphragm (331) is a circular, elliptical, regular polygonal or irregular closed curve, the radial section being an axial section perpendicular to the first port (312).

4. The check valve (3) of claim 2, wherein a centerline of the elastic diaphragm (331) coincides with a centerline of the first port (312), the first end (3311) of the elastic diaphragm (331) having an inner diameter greater than an inner diameter of the first port (312).

5. The check valve (3) of claim 2, wherein the inner diameter of the elastic diaphragm (331) increases from the first end (3311) to the second end (3312).

6. A non-return valve (3) according to claim 2, characterised in that the inner wall of the valve seat (30) extends towards the passage (311) with a mounting post (322), the mounting seat (332) having a socket (3321), the socket (3321) being in bayonet engagement with the mounting post (322).

7. The non-return valve (3) according to claim 6, characterized in that said seat (30) comprises:

a valve body (31), the passage (311), the first port (312), and the second port (313) all being formed in the valve body (31), the valve body (31) further having a mounting port (316) communicating with the passage (311);

and the valve cover (32) is detachably covered on the mounting opening (316), and the mounting column (322) is formed on the valve cover (32).

8. The check valve (3) of any of claims 2 to 7, characterized in that the mounting seat (332) and the elastic diaphragm (331) are made of soft plastic;

or the elastic diaphragm (331) is made of soft rubber materials.

9. The check valve (3) of any one of claims 2 to 7, characterized in that a first convex column (314) is protruded outwards on the outer wall of the valve seat (30) corresponding to the first port (312), and the first convex column (314) is communicated with the first port (312);

the outer wall of the valve seat (30) is provided with a second convex column (315) outwards in a protruding mode corresponding to the second port (313), and the second convex column (315) is communicated with the second port (313).

10. A water tank comprising a tank body (1) and an air pump (2), said air pump (2) being connected to said tank body (1), characterized in that it further comprises a one-way valve (3) according to any one of claims 1 to 9;

wherein the one-way valve (3) is arranged between the air pump (2) and the box body (1);

or the one-way valve (3) is arranged at the water outlet of the box body (1).

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