CN215763437U - Water tap capable of preventing water source from being polluted - Google Patents

Abstract

The application provides a faucet capable of preventing water source pollution, which comprises a faucet body, a mixing valve, a pull type water spraying head, a water inlet assembly, a mixing valve, a mixed water outlet pipe, a pull type hose and a non-return device, wherein the pull type water spraying head is arranged on the faucet body; the non-return device is connected between the water outlet end of the mixed water outlet pipe and the water inlet end of the pull hose, a water flow channel which can allow mixed water to pass through is arranged inside the non-return device, a connecting port which can be plugged is arranged, the connecting port can be connected with a drain valve, the connecting port is communicated with the water flow channel, at least one non-return valve is arranged in the water flow channel, the non-return valve is positioned at the upstream of the junction of the connecting port and the water flow channel, water source pollution caused by reverse backflow of water flow from the pull type water spray head and/or the connecting port to the mixing valve can be effectively prevented, and the sanitation and safety of water are further ensured.

Description

Water tap capable of preventing water source from being polluted

Technical Field

The present invention relates to a faucet, and more particularly, to a faucet capable of preventing a water source from being polluted.

Background

Floor drain designs are often found in many buildings, such as toilets or kitchens in homes, laundries in some countries, etc. By utilizing the design of the floor drain, the water can be prevented from accumulating on the ground when the water pipe bursts, or the water can be conveniently and rapidly drained to a sewer when cleaning and washing.

However, sewers often produce foul odors or various unpleasant odors, and in order to prevent these gases from escaping into the building, a Trap (Trap) is often designed under the floor drain, which usually looks like a "U" or "S" shaped pipe. In the early days, people can regularly pour water into the floor drain to ensure that accumulated water in a trap keeps water inlet sealing or liquid sealing so as to prevent gas in a sewer from entering a toilet, a kitchen or a laundry and the like through the floor drain.

However, if water is not poured into the floor drain regularly or frequently, which may cause the water in the trap to evaporate over time, sewer gases are released from the floor drain.

In order to be able to replenish the liquid frequently, some people have begun to connect the sink drain line of the bathroom, kitchen or laundry to the trapway by means of a Trap Primer Valve, which ensures a liquid seal by replenishing a small portion of the water to the trapway each time the sink is used. The Trap can also be called Trap Primer or Trap Primer Valve (Trap Primer Valve) and is primarily intended to direct a portion of the water flowing through the piping system to drain into the Trap for liquid replenishment.

Later, some faucets have also incorporated into their water inlet lines a trap as described above, which is activated by water pressure to automatically replenish a portion of the water flow into the trap when water flow occurs in the water inlet piping system, such as the pressure-activated trap disclosed in U.S. patent publication No. US 2007/0277880A 1.

When the existing pull-out faucet is installed, a three-way type connecting pipe is additionally arranged between a mixed water outlet pipe connected with a mixing valve and a pull-out hose connected with a pull-out sprinkler head, and a connector of the connecting pipe is connected to the drain valve. Therefore, each time water flows through the connection pipe, a part of the water flows automatically from the connection port of the connection pipe to the trap and is supplied from the trap to the inside of the trap.

Some pull-out faucets further include a non-return device downstream of the connection tube to prevent water from flowing back to the mixing valve in a reverse direction due to siphoning when the faucet is turned off, thereby contaminating the water supply. However, since the non-return device is installed at the downstream of the connection pipe, not at the upstream, so that when the faucet is closed to discharge water, the non-return device cannot prevent the water flow from the trap from entering the mixing valve, such a structure still has the concern of causing water source pollution, and does not meet the requirements of relevant national and regional regulations.

Therefore, how to improve the structure of the existing pull-out faucet, when the water flow from the sprinkler head and the drain valve is siphoned to generate reverse backflow, the water flow can still be effectively prevented from entering the mixing valve, thereby avoiding polluting the water source, ensuring the sanitation and safety of the water, and having considerable urgency and necessity.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a faucet capable of preventing water source pollution, which can effectively prevent water from flowing back to a mixing valve in a reverse direction from a sprinkler head and a connection port to cause water source pollution, thereby ensuring water use hygiene and safety.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: provided is a water faucet capable of preventing a water source from being polluted, including:

a faucet body;

a mixing valve mounted inside the faucet body;

the pull-type sprinkler head is arranged on the faucet body and can be pulled and pulled by a user;

the water inlet assembly comprises a cold water inlet pipe and a hot water inlet pipe which are respectively connected with the mixing valve so as to supply cold water and hot water;

the mixed water outlet pipe is provided with a water inlet end of the mixed water outlet pipe and a water outlet end of the mixed water outlet pipe, and the water inlet end of the mixed water outlet pipe is connected to the mixing valve and can be used for outputting mixed water;

the drawing hose is provided with a drawing hose water inlet end and a drawing hose water outlet end, and the drawing hose water outlet end is connected with the drawing type sprinkler head;

non-return device, connect in mix water outlet pipe play water end with the pull hose is intake between the end two, non-return device is inside to have and to supply the rivers passageway that mix water and pass through to be provided with the connector that can be plugged, the drain valve can be connected to the connector, just the connector communicate in the rivers passageway, be provided with an at least non-return valve in the rivers passageway, the non-return valve is located the connector with the upper reaches department of rivers passageway juncture, in order to prevent to come from pull formula sprinkler bead and/or the rivers reverse reflux of connector extremely the mixing valve.

In one embodiment, two check valves are disposed inside the water flow passage along the water flow direction.

In one embodiment, the check device comprises a check pipe and a connecting pipe in the form of a tee joint, one end of the check pipe is connected to the water outlet end of the mixed water outlet pipe, the other end of the check pipe is connected to the connecting pipe, and the check valve is arranged in the check pipe; the other end of the connecting pipe, which is opposite to the non-return pipe, is connected to the water inlet end of the drawing hose, and the connecting port is formed on the connecting pipe.

In one embodiment, the check tube is internally formed with a first slot and a second slot, and a mounting chamber between the first slot and the second slot; the first slot can be used for the insertion connection of the water outlet end of the mixed water outlet pipe; the installation chamber can be used for installing the check valve; the second slot can supply the pull hose is intake and is held to inlay to insert and connect.

In one embodiment, a first limiting structure is arranged between the first slot and the installation cavity, and the first limiting structure can enable the check valve to be nested and limited in the installation cavity after being placed into the second slot.

In one embodiment, the first stop structure is a flange.

In one embodiment, the connecting pipe has a first end and a second end, and an internal flow passage located at the first end and the second end, and the outer peripheral wall of the connecting pipe protrudes to form a first connecting head, a first plug groove is formed inside the first connecting head, the connecting port is formed at the opening of the first plug groove, and a first communicating hole is formed at the bottom of the first plug groove and can be communicated with the internal flow passage.

In one embodiment, the first plug groove is matched with a first sealing plug which is detachably screwed with the plug groove to seal the connecting port.

In one embodiment, the mixed water outlet pipe, the non-return pipe, the connection pipe and the drawing hose are connected with each other in any one of a quick connection structure and a screw connection structure.

In one embodiment, the quick connect structure comprises a plug portion, a barrel and slot portion, and a snap ring; the plug part and the barrel groove part are respectively positioned at any two mutually connected opposite ends of the mixed water outlet pipe, the non-return pipe, the connecting pipe and the drawing hose, and the plug part is provided with a plug connector and a buckle annular edge positioned on the outer peripheral wall of the middle section of the plug connector; the cylinder groove part is provided with a slot for the insertion of the plug connector and an annular wall adjacent to the slot, and the annular wall is provided with a plurality of buckling grooves along the annular distribution; the buckle ring is provided with an annular top cover and a plurality of buckle claws integrally extending from the annular top cover, the buckle claws can be respectively buckled outwards from the inside of the annular wall and are limited in the buckle grooves of the annular wall, and the buckle claws can be stopped and limited on the top wall surface of the annular wall by the annular top cover; the plug can push and open the buckling claws through the inside of the annular top cover by the buckling ring edges and then is embedded and inserted into the slot, and the buckling ring edges can be blocked by the elastically restored buckling claws.

In one embodiment, the screw coupling structure includes an outer screw portion and an inner screw portion that are capable of being screw-coupled to each other, and the outer screw portion and the inner screw portion are respectively located at two opposite ends of the mixed water outlet pipe, the non-return pipe, the connection pipe, and the withdrawal hose, which are connected to each other.

In one embodiment, the non-return device includes a non-return connection pipe in the form of a tee, one end of the non-return connection pipe is connected to the water outlet end of the mixed water outlet pipe, the other end of the non-return connection pipe is connected to the water inlet end of the pull-out hose, the non-return connection pipe is internally provided with the non-return valve, and the non-return connection pipe is provided with the connection port.

In one embodiment, the non-return connecting pipe is internally provided with an upstream chamber, a downstream chamber and a communication chamber between the upstream chamber and the downstream chamber; one part of the upstream cavity can be used for the insertion connection of the water outlet end of the mixed water outlet pipe, and the other part can be used for the installation of the check valve; the downstream cavity can be used for the water inlet end of the drawing hose to be inserted and connected.

In one embodiment, a second connector protrudes from the outer peripheral wall of the non-return connecting pipe, a second plug groove is formed inside the second connector, the connecting port is formed at the opening of the second plug groove, and a second communication hole is formed at the bottom of the second plug groove and can be aligned with and communicated with the communication chamber.

In one embodiment, the second plug groove is matched with a second plug, and the second plug is detachably screwed in the second plug groove to seal the connecting port.

In one embodiment, a second limiting structure is disposed in the upstream chamber and close to the communicating chamber, and the second limiting structure is used for stopping and limiting the check valve.

In one embodiment, the second stop formation is a flange.

In one embodiment, the mixed water outlet pipe, the non-return connection pipe and the pull-out hose are connected to each other in any one of a quick connection structure and a screw connection structure.

In one embodiment, the quick connect structure comprises a plug portion, a barrel and slot portion, and a snap ring; the plug part and the barrel groove part are respectively positioned at any two mutually connected opposite ends of the mixed water outlet pipe, the non-return connecting pipe and the drawing hose, and the plug part is provided with a plug connector and a buckle annular edge positioned on the outer peripheral wall of the middle section of the plug connector; the cylinder groove part is provided with a slot for the insertion of the plug connector and an annular wall adjacent to the slot, and the annular wall is provided with a plurality of buckling grooves along the annular distribution; the buckle ring is provided with an annular top cover and a plurality of buckle claws integrally extending from the annular top cover, the buckle claws can be respectively buckled outwards from the inside of the annular wall and are limited in the buckle grooves of the annular wall, and the buckle claws can be stopped and limited on the top wall surface of the annular wall by the annular top cover; the plug can push and open the buckling claws through the inside of the annular top cover by the buckling ring edges and then is embedded and inserted into the slot, and the buckling ring edges can be blocked by the elastically restored buckling claws.

In one embodiment, the screw coupling structure includes an outer screw portion and an inner screw portion that are capable of being screw-coupled to each other, the outer screw portion and the inner screw portion being located at two opposite ends of the mixed water outlet pipe, the non-return connection pipe, and the pull-out hose, which are connected to each other, respectively.

The application provides a can prevent tap that water source pollutes's beneficial effect lies in:

compared with the prior art, the water faucet capable of preventing the water source from being polluted has the advantages that the check valve in the check device is arranged at the upstream of the junction of the connecting port and the water flow channel, so that even if the water flow from the pull type water spraying head and/or the connecting port generates reverse backflow due to the siphoning effect in the moment that the water outlet of the water faucet is closed every time, the water flow can still be effectively blocked by the check valve and cannot enter the mixing valve, the water source is effectively prevented from being polluted, and the sanitation and the safety of water are further ensured.

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 faucet provided in an embodiment of the present application;

FIG. 2 is a schematic view of a partial structure of a backstop device according to an embodiment of the present disclosure;

FIG. 3 is a partial side cross-sectional view of a backstop according to an embodiment of the present application;

FIG. 4 is a schematic view of a partially exploded structure of a backstop device according to an embodiment of the present disclosure;

FIG. 5 is an exploded view of the check tube and the retaining ring according to the embodiment of the present disclosure;

FIG. 6 is a partial side sectional view of an assembly portion of the non-return pipe, the retaining ring and the mixed water outlet pipe according to the embodiment of the present application;

FIG. 7 is a schematic view of a partial structure of a backstop device according to another embodiment of the present application;

FIG. 8 is a partial side cross-sectional view of a backstop according to another embodiment of the present application.

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, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered 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.

The water faucet provided by the embodiment of the present application for preventing the water source from being polluted will now be described.

Referring to fig. 1 to 4, a faucet 1 capable of preventing water source pollution according to an embodiment of the present invention is a conventional pull-out faucet, and mainly includes a faucet body 10, a mixing valve 20, a pull-out faucet 30, a water inlet assembly 40, a mixed water outlet pipe 50, a pull-out hose 60, and a non-return device 70. Wherein:

the mixing valve 20 is installed inside the faucet body 10.

The pull type sprinkler head 30 is installed on the faucet body 10, and the pull type sprinkler head 30 can be pulled and operated by a user.

The water inlet assembly 40 includes a cold water inlet pipe 41 and a hot water inlet pipe 42, the cold water inlet pipe 41 and the hot water inlet pipe 42 being connected to the mixing valve 20, respectively, the cold water inlet pipe 41 being for supplying cold water, and the hot water inlet pipe 42 being for supplying hot water.

The mixed water outlet pipe 50 has a mixed water inlet end 51 and a mixed water outlet end 52, the mixed water inlet end 51 is connected to the mixing valve 20, and the mixed water in the mixing valve 20, which is obtained by mixing the cold water and the hot water in a proper ratio, can be discharged.

The pull-out hose 60 has a pull-out hose inlet end 61 and a pull-out hose outlet end 62, and the pull-out hose outlet end 62 is connected to the pull-out sprinkler head 30.

The non-return device 70 is connected between the outlet end 52 of the mixed water outlet pipe and the inlet end 61 of the pull hose, the non-return device 70 is internally provided with a water flow channel 71 through which the mixed water can pass, and is provided with a connecting port 72 which can be blocked, the connecting port 72 can be connected with a common drain valve, the connecting port 72 is communicated with the water flow channel 71, the water flow channel 71 is internally provided with at least one non-return valve 73, and the non-return valve 73 is positioned at the upstream of the junction part of the connecting port 72 and the water flow channel 71 and can prevent the water flow from the pull type sprinkler head 30 and/or the connecting port 72 from reversely flowing back to the mixing valve 20.

Since the mixed water flows out of the mixing valve 20 and flows toward the pull-out sprinkler head 30 along the mixed water outlet pipe 50, the check 70 and the pull-out hose 60, it is easily understood that the position of the "upstream" is determined by the flowing direction of the mixed water.

In the faucet 1 for preventing the water source from being polluted in the above embodiment, since the check valve 73 of the check device 70 is installed at the upstream of the junction of the connection port 72 and the water flow channel 71, even if the water flow from the pull-out type sprinkler head 30 and/or the connection port 72 is reversely flowed back due to the siphon action at the moment when the faucet 1 is closed every time the water is discharged, the water flow can still be effectively blocked by the check valve 73 and not enter the mixing valve 20, thereby effectively preventing the water source from being polluted and further ensuring the sanitation and safety of the water.

Alternatively, two check valves 73 are provided inside the water flow passage 71 of the check device 70 along the water flow direction, and it is clearly seen that the check valves 73 are combined substantially in an engaged manner.

In one embodiment of the present application, the backstop 70 is composed of two separate members including a backstop tube 70a and a connection tube 70b in the form of a tee; one end of the check pipe 70a is connected to the water outlet end 52 of the mixed water outlet pipe, the other end is connected to the connecting pipe 70b, and two check valves 73 are arranged inside the check pipe 70 a; one end of the connection pipe 70b opposite to the check pipe 70a is connected to the drawn hose water inlet end 61, and a connection port 72 is formed on the connection pipe 70 b.

Optionally, the non-return pipe 70a of this embodiment is formed with a first slot 711 and a second slot 712 inside, and an installation chamber 713 located between the first slot 711 and the second slot 712; the first slot 711 is used for the insertion connection of the water outlet end 52 of the mixed water outlet pipe, a first limiting structure 714 is arranged between the first slot 711 and the installation cavity 713, and the first limiting structure 714 can be used for the nesting and limiting of the check valve 73 in the installation cavity 713 after the check valve 73 is placed in the second slot 712; the second slot 712 allows the water inlet end 61 of the pull-out hose to be inserted and connected, and provides a stop for the check valve 73. Through the design of the first limit structure 714, the accuracy and firmness of the assembly of the check valve 73 can be ensured.

In one embodiment, the first stop structure 714 may be configured as a flange.

Alternatively, the connection tube 70b has a first end 741 and a second end 742, and an internal flow passage 743 located between the first end 741 and the second end 742, and the outer peripheral wall of the connection tube 70b protrudes a first connection head 75, a first slot 751 is formed inside the first connection head 75, a connection port 72 is formed at an opening of the first slot 751, a first through hole 752 is formed at a bottom of the first slot 751, and the first through hole 752 can communicate with the internal flow passage 743.

Optionally, first plug groove 751 is fitted with a first plug 753, first plug 753 removably threadably sealing into first plug groove 751, first plug 753 sealing port 72, and port 72 is allowed to be connected to the trap by removing first plug 753. For example, by threading a pipe in communication with the trap.

In the present embodiment, the mixed water outlet pipe 50, the non-return pipe 70a, the connection pipe 70b and the drawing hose 60 are connected to each other by either a quick connection structure 80 or a screw connection structure 90. For example, the mixed water outlet pipe 50 and the non-return pipe 70a can be connected to each other by a quick connection structure 80. It is also possible that the check pipe 70a and the connection pipe 70b and the drawing hose 60 are threadedly coupled with each other by the screw structure 90.

Specifically, referring to fig. 5 and 6, the quick-connect structure 80 includes a plug portion 81, a barrel portion 82 and a retaining ring 83; the plug portion 81 is located at the outlet end 52 of the mixed water outlet pipe, and is formed with a plug 811 and a snap ring 812 located on the outer peripheral wall of the middle portion of the plug 811. The cylindrical groove 82 is located at the opposite end of the non-return pipe 70a, and has a slot for the plug 811 to insert, in this embodiment, the slot is a first slot 711, and an annular wall 821 adjacent to the first slot 711 is further formed, and a plurality of fastening grooves 822 are circumferentially distributed on the annular wall 821; the retaining ring 83 has an annular top cap 831 and a plurality of retaining claws 832 integrally extending from the annular top cap 831, the retaining claws 832 are respectively outwardly retained in the retaining grooves 822 of the annular wall 821 from the inside of the annular wall 821 and are retained on the top wall of the annular wall 821 by the annular top cap 831.

During assembly, the plug connector 811 can be inserted into the first slot 711 through the annular top cap 831, during which the locking rim 812 abuts against the locking claw 832, so that the locking claw 832 can pass through smoothly after being elastically expanded, and the locking rim 812 can be stopped by the locking claw 832 and cannot move back to disengage from the locking claw 832 due to elastic recovery of the locking claw 832, thereby achieving the effect of quick insertion and assembly.

Alternatively, the screw structure 90 includes an external screw portion 91 and an internal screw portion 92 that can be screwed together, for example, an internal screw portion 92 can be disposed at the second slot 712 of the check tube 70a, and an external screw portion 91 can be disposed at the first end 741 of the connection tube 70b, so that the check tube 70a and the connection tube 70b can be screwed together by the external screw portion 91 and the internal screw portion 92, thereby achieving the effect of easy and firm assembly.

In another embodiment of the present application, referring to fig. 7 and 8, the check device 70 may also be formed by a single independent component, which includes a check connection pipe 700 in the form of a three-way pipe, one end of the check connection pipe 700 is connected to the outlet end 52 of the mixed water outlet pipe, the other end is connected to the inlet end 61 of the pull-out hose, the check connection pipe 700 is internally provided with a check valve 73, and the check connection pipe 700 is formed with a connection port 72.

Specifically, the check connecting tube 700 of the present embodiment is formed with an upstream chamber 701 and a downstream chamber 702 inside, and a communicating chamber 703 between the upstream chamber 701 and the downstream chamber 702; one part of the upstream cavity 701 can be used for the insertion connection of the water outlet end 52 of the mixed water outlet pipe, and the other part can be used for installing the check valve 73; the downstream chamber 702 is adapted for the insertion of the pull-out hose at the water inlet end 61.

In this embodiment, a second connector 76 protrudes from the outer peripheral wall of the non-return connection pipe 700, a second plug slot 761 is formed in the second connector 76, a connection port 72 is formed at an opening of the second plug slot 761, a second communication hole 762 is formed at the bottom of the second plug slot 761, and the second communication hole 762 is aligned with and communicated with the communication chamber 703.

In this embodiment, the second plug slot 761 is also provided with a second plug 763, and the second plug 763 is detachably screwed into the second plug slot 761 to seal the connection port 72.

In this embodiment, the upstream chamber 701 is provided with a second limiting structure 704 near the communicating chamber 703, and the second limiting structure 704 is used to block the limiting check valve 73.

In one embodiment, the second retention structure 704 may be configured as a flange.

Alternatively, the mixed water outlet pipe 50, the non-return connection pipe 700 and the pull-out hose 60 of the present embodiment are connected to each other by any one of the quick connection structure 80 and the screw connection structure 90. In the embodiment, it can be clearly seen that the two ends of the non-return connection pipe 700 are assembled and connected with each other by the quick connection structure 80, but not limited thereto, the screw connection structure 90 can be selectively used according to actual requirements.

It can be easily understood that the water flow passage 71 in the previous embodiment is defined by the passage of the water flow inside the non-return pipe 70a and the connection pipe 70 b; in the latter embodiment, the passage for the water flow inside the non-return connection pipe 700 is separately formed.

As can be seen from the above description, in the faucet 1 of the present application, the check valve 73 of the check device 70 is installed at the upstream of the junction of the connection port 72 and the water flow channel 71, so that even if the water flow from the pull-out faucet 30 and/or the connection port 72 is reverse-flowed due to the siphon action at the moment when the faucet 1 is closed every time the water is discharged, the water flow can still be effectively blocked by the check valve 73 and can not enter the mixing valve 20, and therefore, the water source can be effectively prevented from being polluted, and the sanitation and safety of the water can be ensured, so that the technical problems that the water source can be polluted and the requirements of relevant regulations cannot be met when the conventional faucet, especially the pull-out faucet is connected to a general drain valve can be effectively solved.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (20)

1. A faucet capable of preventing contamination of a water source, comprising:

a faucet body;

a mixing valve mounted inside the faucet body;

the pull-type sprinkler head is arranged on the faucet body and can be pulled and pulled by a user;

the water inlet assembly comprises a cold water inlet pipe and a hot water inlet pipe which are respectively connected with the mixing valve so as to supply cold water and hot water;

the mixed water outlet pipe is provided with a water inlet end of the mixed water outlet pipe and a water outlet end of the mixed water outlet pipe, and the water inlet end of the mixed water outlet pipe is connected to the mixing valve and can be used for outputting mixed water;

the drawing hose is provided with a drawing hose water inlet end and a drawing hose water outlet end, and the drawing hose water outlet end is connected with the drawing type sprinkler head;

non-return device, connect in mix water outlet pipe play water end with the pull hose is intake between the end two, non-return device is inside to have and to supply the rivers passageway that mix water and pass through to be provided with the connector that can be plugged, the drain valve can be connected to the connector, just the connector communicate in the rivers passageway, be provided with an at least non-return valve in the rivers passageway, the non-return valve is located the connector with the upper reaches department of rivers passageway juncture, in order to prevent to come from pull formula sprinkler bead and/or the rivers reverse reflux of connector extremely the mixing valve.

2. The faucet of claim 1, wherein the faucet is a faucet capable of preventing contamination of a water source,

two check valves are arranged in the water flow channel along the water flow direction.

3. The faucet of claim 1, wherein the faucet is a faucet capable of preventing contamination of a water source,

the non-return device comprises a non-return pipe and a three-way connecting pipe, one end of the non-return pipe is connected to the water outlet end of the mixed water outlet pipe, the other end of the non-return pipe is connected to the connecting pipe, and the non-return valve is arranged in the non-return pipe; the other end of the connecting pipe, which is opposite to the non-return pipe, is connected to the water inlet end of the drawing hose, and the connecting port is formed on the connecting pipe.

4. The faucet of claim 3, wherein the faucet is a faucet capable of preventing contamination of a water source,

a first slot, a second slot and an installation chamber positioned between the first slot and the second slot are formed in the non-return pipe; the first slot can be used for the insertion connection of the water outlet end of the mixed water outlet pipe; the installation chamber can be used for installing the check valve; the second slot can supply the pull hose is intake and is held to inlay to insert and connect.

5. The faucet of claim 4, wherein the faucet is a faucet capable of preventing contamination of a water source,

a first limiting structure is arranged between the first slot and the installation cavity, and the first limiting structure can enable the check valve to be embedded and limited in the installation cavity after the check valve is placed into the second slot.

6. The faucet of claim 5, wherein the faucet is a faucet capable of preventing contamination of a water source,

the first limiting structure is a flange.

7. The faucet of claim 3, wherein the faucet is a faucet capable of preventing contamination of a water source,

the connecting pipe has first end and second end, and is located first end with the inside runner of second end, just the periphery wall projection of connecting pipe has first connector, the inside first cock groove that is formed with of first connector, the opening part in first cock groove forms the connector, first cock groove bottom is formed with first through-hole, first through-hole can communicate in inside runner.

8. The faucet of claim 7, wherein the faucet is a faucet capable of preventing contamination of a water source,

the first plug groove is matched with a first sealing plug, and the first sealing plug can be detachably screwed in the plug groove to seal the connecting port.

9. The faucet of claim 3, wherein the faucet is a faucet capable of preventing contamination of a water source,

the mixed water outlet pipe, the non-return pipe, the connecting pipe and the drawing hose are connected with one another in a quick connection structure or a screw connection structure.

10. The faucet of claim 9, wherein the faucet is a faucet capable of preventing contamination of a water source,

the quick connection structure comprises a plug part, a barrel groove part and a retaining ring; the plug part and the barrel groove part are respectively positioned at any two mutually connected opposite ends of the mixed water outlet pipe, the non-return pipe, the connecting pipe and the drawing hose, and the plug part is provided with a plug connector and a buckle annular edge positioned on the outer peripheral wall of the middle section of the plug connector; the cylinder groove part is provided with a slot for the insertion of the plug connector and an annular wall adjacent to the slot, and the annular wall is provided with a plurality of buckling grooves along the annular distribution; the buckle ring is provided with an annular top cover and a plurality of buckle claws integrally extending from the annular top cover, the buckle claws can be respectively buckled outwards from the inside of the annular wall and are limited in the buckle grooves of the annular wall, and the buckle claws can be stopped and limited on the top wall surface of the annular wall by the annular top cover; the plug can push and open the buckling claws through the inside of the annular top cover by the buckling ring edges and then is embedded and inserted into the slot, and the buckling ring edges can be blocked by the elastically restored buckling claws.

11. The faucet of claim 9, wherein the faucet is a faucet capable of preventing contamination of a water source,

the screw connection structure comprises an outer screw thread part and an inner screw thread part which can be screwed together, and the outer screw thread part and the inner screw thread part are respectively positioned at any two mutually connected opposite ends of the mixed water outlet pipe, the non-return pipe, the connecting pipe and the drawing hose.

12. The faucet of claim 1, wherein the faucet is a faucet capable of preventing contamination of a water source,

the non-return device comprises a non-return connecting pipe in a three-way form, one end of the non-return connecting pipe is connected to the water outlet end of the mixed water outlet pipe, the other end of the non-return connecting pipe is connected to the water inlet end of the drawing hose, the non-return valve is arranged in the non-return connecting pipe, and the connecting port is formed in the non-return connecting pipe.

13. The faucet of claim 12, wherein the faucet is a faucet capable of preventing contamination of a water source,

an upstream cavity, a downstream cavity and a communication cavity between the upstream cavity and the downstream cavity are formed inside the non-return connecting pipe; one part of the upstream cavity can be used for the insertion connection of the water outlet end of the mixed water outlet pipe, and the other part can be used for the installation of the check valve; the downstream cavity can be used for the water inlet end of the drawing hose to be inserted and connected.

14. The faucet of claim 13, wherein the faucet is a faucet capable of preventing contamination of a water source,

the periphery wall projection of contrary connecting pipe has the second connector, the inside second stopper groove that is formed with of second connector, the opening part in second stopper groove is formed with the connector, just second stopper groove bottom is formed with the second intercommunicating pore, the second intercommunicating pore can aim at and communicate in communicate the cavity.

15. The faucet of claim 14, wherein the faucet further comprises a water supply,

the second plug groove is matched with a second plug, and the second plug can be detachably screwed in the second plug groove to seal the connecting port.

16. The faucet of claim 13, wherein the faucet is a faucet capable of preventing contamination of a water source,

and a second limiting structure is arranged at the position, close to the communicating cavity, of the upstream cavity and used for stopping and limiting the check valve.

17. The faucet of claim 16, wherein the faucet further comprises a water supply,

the second limiting structure is a flange.

18. The faucet of claim 12, wherein the faucet is a faucet capable of preventing contamination of a water source,

the mixed water outlet pipe, the non-return connecting pipe and the drawing hose are connected with one another by a quick connection structure or a screw connection structure.

19. The faucet of claim 18, wherein the faucet further comprises a water supply,

the quick connection structure comprises a plug part, a barrel groove part and a retaining ring; the plug part and the barrel groove part are respectively positioned at any two mutually connected opposite ends of the mixed water outlet pipe, the non-return connecting pipe and the drawing hose, and the plug part is provided with a plug connector and a buckle annular edge positioned on the outer peripheral wall of the middle section of the plug connector; the cylinder groove part is provided with a slot for the insertion of the plug connector and an annular wall adjacent to the slot, and the annular wall is provided with a plurality of buckling grooves along the annular distribution; the buckle ring is provided with an annular top cover and a plurality of buckle claws integrally extending from the annular top cover, the buckle claws can be respectively buckled outwards from the inside of the annular wall and are limited in the buckle grooves of the annular wall, and the buckle claws can be stopped and limited on the top wall surface of the annular wall by the annular top cover; the plug can push and open the buckling claws through the inside of the annular top cover by the buckling ring edges and then is embedded and inserted into the slot, and the buckling ring edges can be blocked by the elastically restored buckling claws.

20. The faucet of claim 19, wherein the faucet is further configured to prevent contamination of a water source,

the screw connection structure comprises an outer screw thread part and an inner screw thread part which can be screwed together, and the outer screw thread part and the inner screw thread part are respectively positioned at any two mutually connected opposite ends of the mixed water outlet pipe, the non-return connecting pipe and the drawing hose.

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