CN212131678U - Waterway expansion device - Google Patents

Abstract

The application belongs to the field of kitchen and bathroom faucet equipment, and provides a waterway expansion device, which comprises a water outlet pipe and a water inlet pipe connected with an access water source, wherein a water inlet joint connected with a water-involved household appliance is arranged on the water inlet pipe; the outlet pipe includes first outlet pipe and second outlet pipe, first outlet pipe is equipped with the drainage joint of being connected with the household electrical appliances of wading, the second outlet pipe with be equipped with the outlet valve between the inlet tube, the outlet valve is used for right the access water source to the water of second outlet pipe is controlled. The utility model provides a water route extension device is integrative with the function integration of intaking and drainage to satisfy the installation demand of household electrical appliances wading, reduce effectively or avoid the user to the transformation of kitchen water and electricity overall arrangement, make household electrical appliances wading install fast and normal use.

Description

Waterway expansion device

Technical Field

The application belongs to the field of kitchen and bathroom faucet equipment, and particularly relates to a waterway expansion device.

Background

The household appliance for wading in daily life, such as an automatic dish washing machine, has the function of spraying and washing tableware, and needs to input and discharge water sources. In order to drain the water in the dishwasher, the drain pipe of the dishwasher is generally directly inserted into the sewer pipe, so that a user is required to install the dishwasher relatively close to the sewer pipe, resulting in limitation of the installation position of the dishwasher. Whereas the inlet pipe of a dishwasher is generally installed relatively close to the input water source. However, in practical applications, if a general user does not lay out kitchen water and electricity in advance, a newly purchased dishwasher needs to change the layout of a kitchen in order to meet installation requirements, so that the workload is increased, the modification cost is increased, and the user cannot use the dishwasher normally.

Therefore, in order to meet the installation requirements of the water-related household appliances and reduce the reconstruction of the kitchen water and electricity layout by users, the water-related household appliance installation method is a technical problem which needs to be researched and solved by manufacturers of the water-related household appliances at present.

Disclosure of Invention

An object of the embodiment of this application is to provide a water route extension device, the function integration that will intake and drainage is integrative to satisfy the installation demand of household electrical appliances related to water, reduce effectively or avoid the user to the transformation of kitchen water and electricity overall arrangement, make household electrical appliances related to water install fast and normal use.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: the waterway expansion device comprises a water outlet pipe and a water inlet pipe connected with an access water source, wherein a water inlet joint connected with a household appliance in the wading is arranged on the water inlet pipe; the outlet pipe includes first outlet pipe and second outlet pipe, first outlet pipe is equipped with the drainage joint of being connected with the household electrical appliances of wading, the second outlet pipe with be equipped with the outlet valve between the inlet tube, the outlet valve is used for right the access water source to the water of second outlet pipe is controlled.

The application provides a water route extension device's beneficial effect lies in: compared with the prior art, the integrated water route extension adapter that forms a whole of structure of will intaking and draining to be connected with the access water source, make the waterway connection of the household electrical appliances of wading accessible this water route extension device can realize intaking and drainage, thereby satisfy the installation demand of household electrical appliances of wading, reduce the installation restriction of household electrical appliances of wading effectively, improve the installation flexibility of household electrical appliances of wading. The waterway expansion device is also provided with a water outlet valve for controlling a water supply path connected with a water source, so that the water consumption requirements of daily water and water-related household appliances can be met simultaneously, and the controllability of an expanded waterway is effectively improved. Especially, the kitchen is especially important for a user kitchen with only a single water source, the reconstruction of the user on kitchen water and electricity layout is effectively reduced or avoided, and the water-related household appliance can be quickly installed and normally used.

The structure of the water outlet valve is improved, a water outlet pipe used for installing the water outlet valve is arranged between the second water outlet pipe and the water inlet pipe, and a water outlet communicated with the second water outlet pipe is arranged on the water outlet pipe; the water discharge pipe is also provided with an upper pipe orifice communicated with the outside and a lower pipe orifice communicated with the water inlet pipe; the water outlet valve is arranged on the water discharge pipe and opens and closes a water passing channel from the lower pipe orifice to the water outlet, so that daily water and water for the wading household appliance are effectively controlled.

Optionally, the water outlet valve comprises a pressing cap and a flow-limiting column, the pressing cap is arranged on an upper pipe orifice of the water discharge pipe, one end of the flow-limiting column is connected with the pressing cap, and the other end of the flow-limiting column penetrates out of a lower pipe orifice of the water discharge pipe and extends into the water inlet pipe; the flow limiting column is accommodated in the water discharge pipe, and a water passing gap is formed between the outer wall of the flow limiting column and the inner wall of the water discharge pipe; and one end of the flow limiting column communicated with the water inlet pipe is also provided with a flow limiting cover for sealing the lower pipe orifice. The user can press the pressing cap, the water outlet valve can be operated to realize water discharge control, the switch operation is effectively simplified, and the use by the user is facilitated.

Optionally, a first elastic element for pushing the flow limiting column to move upwards so that the flow limiting cover is normally closed to the lower nozzle is arranged between the pressing cap and the upper nozzle of the water discharge pipe, and the first elastic element is sleeved with the flow limiting column. The water outlet valve forms a normally closed valve which can effectively close the water discharge pipe so as to keep the water supply to the water-involved household appliances. When the user needs daily water, the water outlet valve can be operated to drain water, and the water flow is discharged from the second water outlet pipe in a controllable mode for use.

Optionally, a sealing ring is further arranged on the flow limiting column, a fixing groove for installing the sealing ring is formed in the periphery of the flow limiting column, and the fixing groove and the flow limiting cover are adjacently arranged, so that the sealing ring is tightly attached to the flow limiting cover, and the sealing performance of sealing the lower pipe orifice is effectively improved.

Optionally, a slot for connecting with the flow-limiting column is formed in the bottom of the pressing cap, a convex ring arranged around the upper pipe orifice is arranged on the water discharge pipe, and an annular opening of the convex ring is smaller than a notch of the slot, so that the pressing cap is covered on the convex ring through the slot; the first elastic piece is sleeved on the flow limiting column and contained in the slot to abut against the convex ring. The flow limiting column is pressed by the pressing cap to form a motion track moving vertically downwards, the concentricity between the flow limiting column and the water discharge pipe can be effectively improved, the water passing gap between the outer wall of the flow limiting column and the inner wall of the water discharge pipe is ensured to be kept smooth, and water flow can be smoothly discharged after the water outlet valve is opened. When a user presses down the pressing cap to drain water, the inserting groove of the pressing cap covers the convex ring at the same time to tightly close the upper pipe orifice of the drain pipe, so that water liquid in the drain pipe is prevented from leaking from the upper pipe orifice to cause water leakage.

The connection structure of the water inlet pipe and an accessed water source is improved, the water inlet pipe is also provided with a quick connecting piece connected with the accessed water source, the quick connecting piece comprises a movable buckle arranged on the water inlet pipe and a fixing head arranged on the accessed water source, the movable buckle comprises a sleeve, a second elastic piece and a buckle bead, the water inlet pipe is provided with an installation hole for installing the buckle bead, the outer wall of the water inlet pipe is provided with an installation groove for installing the second elastic piece, and the installation hole is arranged in the installation groove; one end of the fixing head is provided with an inserting pipe for inserting the water inlet pipe, and the inserting pipe is provided with a buckling groove buckled with the buckling bead; the sleeve is sleeved on the periphery of the water inlet pipe, and the sleeve is provided with a pressing ring used for pushing and pressing the second elastic piece to release the buckling beads. In this embodiment, the one end of quick-operation connecting piece is passed through the fixed head and is connected fixedly with the access water source, and the other end of quick-operation connecting piece sets up the activity on the inlet tube and detains, and the activity is detained and can be realized the high-speed joint with the fixed head, simplifies the installation operation effectively, improves the installation effectiveness.

Optionally, a limiting ring is arranged on the mounting groove of the water inlet pipe, and the pressing ring abuts against the limiting ring under the pushing of the second elastic piece; the end part of the sleeve is provided with a stop ring for preventing the buckling beads from falling off, and the stop ring is arranged adjacent to the pressing ring; the periphery of the water inlet pipe is also provided with a limiting ring which is used for abutting against the sleeve to limit the displacement stroke of the sleeve. On the one hand, through the spacing collar, can prevent effectively that the sleeve pipe from deviating from in the inlet tube, can let again detain the pearl and often be in the locking state, ensure the stability of being connected of inlet tube and grafting pipe effectively. On the other hand, the sheathed tube tip is equipped with the barrier ring, the barrier ring with the clamping ring is adjacent to be set up to combine the spacing ring on the inlet tube periphery, when the user operation sleeve pipe pushed down the second elastic component in order to release to detain the pearl, this spacing ring offsets with the sleeve pipe in order to limit sheathed tube displacement stroke, and makes simultaneously block the ring displacement to the mounting hole on, thereby prevent to detain the pearl and deviate from.

Optionally, still be equipped with first sealing ring on the periphery of grafting pipe, first sealing ring with the inner wall interference fit of inlet tube to seal the infiltration gap between the outer wall of grafting pipe and the inner wall of inlet tube, thereby improve sealing performance effectively.

Optionally, be equipped with on the other end of fixed head be used for with insert internal thread and external screw thread that the water source is connected, be equipped with detachable second sealing ring in the other end of fixed head, the cladding of second sealing ring is in on the internal thread. Set up external screw thread and internal thread on the fixed head, the threaded connection structure that can compatible access water source effectively improves the suitability. In addition, the second sealing ring in the fixed head can effectively seal a water leakage gap between the fixed head and an access water source. Wherein, this second sealing ring can be preferred to dismantle the setting, and the cladding of second sealing ring is on the internal thread, dismantles the back when the second sealing ring, can realize the threaded connection of internal thread and access water source.

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 perspective view illustrating a first waterway expansion device according to an embodiment of the present application;

fig. 2 is a schematic perspective view illustrating a second embodiment of the waterway expansion device according to the present application;

fig. 3 is a schematic internal structural diagram of the waterway expansion device provided in the embodiment of the present application;

fig. 4 is a schematic structural diagram of a closed state of an outlet valve of the waterway expansion device provided in the embodiment of the present application;

fig. 5 is a schematic structural diagram illustrating an open state of a water outlet valve of the waterway expansion device according to the embodiment of the present application;

fig. 6 is a first schematic diagram illustrating an exploded structure of the waterway expansion device according to the embodiment of the present application;

fig. 7 is a schematic diagram illustrating an exploded structure of a waterway expansion device according to an embodiment of the present application;

fig. 8 is a schematic structural view of a locking state of a movable buckle of the waterway expansion device according to the embodiment of the present application;

fig. 9 is a schematic structural view of an unlocked state of a movable buckle of the waterway expansion device according to the embodiment of the present application;

fig. 10 is a schematic view of an exploded structure of a fixed head of the waterway expansion device according to the embodiment of the present application.

Wherein, in the figures, the respective reference numerals:

1-water inlet pipe; 11-water inlet joint; 12-mounting holes; 13-mounting grooves; 14-a spacing ring; 15-a limit ring;

2-water outlet pipe; 21-a first water outlet pipe; 211-a drain fitting; 22-a second water outlet pipe;

3-a water outlet valve; 31-pressing the cap; 311-slot; 32-a flow-limiting column; 321-a fixed groove; 33-a flow-restricting cap; 34-a first elastic member; 35-a sealing ring;

4-a water discharge pipe; 41-water outlet; 42-upper orifice; 421-convex ring; 43-lower orifice;

5-movable buckle; 51-a cannula; 511-compression ring; 512-a blocking ring; 52-a second elastic member; 53-a bead;

6-fixing the head; 61-a plug pipe; 611-catching groove; 612-a first seal ring; 62-internal threads; 63-external threads; 64-a second seal ring;

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.

Referring to fig. 1 to 3 together, a description will now be given of a waterway expansion device according to an embodiment of the present application. The waterway expansion device comprises a water inlet pipe 1 and a water outlet pipe 2 which are used for being connected with an access water source, wherein a water inlet joint 11 connected with a household appliance in the wading is arranged on the water inlet pipe 1; the water outlet pipe 2 comprises a first water outlet pipe 21 and a second water outlet pipe 22, the first water outlet pipe 21 is provided with a water drainage connector 211 connected with the wading household appliance, a water outlet valve 3 is arranged between the second water outlet pipe 22 and the water inlet pipe 1, and the water outlet valve 3 is used for controlling water passing of the second water outlet pipe 22 when the water source is connected.

Compared with the prior art, the waterway extension device has the advantages that the waterway extension adapter is integrally formed by water inlet and drainage structures, and is connected with an access water source, so that the waterway connection of water inlet and drainage can be realized by the waterway extension device for wading household appliances, the installation requirement of the wading household appliances is met, the installation limitation of the wading household appliances is effectively reduced, and the installation flexibility of the wading household appliances is improved. The waterway expansion device is also provided with a water outlet valve 3 for controlling a water supply path connected with a water source, so that the water using requirements of daily water and water-related household appliances can be met simultaneously, and the controllability of an expanded waterway is effectively improved. Especially, the kitchen is especially important for a user kitchen with only a single water source, the reconstruction of the user on kitchen water and electricity layout is effectively reduced or avoided, and the water-related household appliance can be quickly installed and normally used.

The structure of the outlet valve 3 is optimized, and in another embodiment of the present application, please refer to fig. 3 to 5 together, a water discharge pipe 4 for installing the outlet valve 3 is disposed between the second outlet pipe 22 and the inlet pipe 1, and a water outlet 41 communicated with the second outlet pipe 22 is disposed on the water discharge pipe 4; the water discharge pipe 4 is also provided with an upper pipe orifice 42 communicated with the outside and a lower pipe orifice 43 communicated with the water inlet pipe 1; the water outlet valve 3 is arranged on the water discharge pipe 4 and opens and closes a water passing channel from the lower pipe opening 43 to the water outlet 41, so that daily water and water for wading household appliances are effectively controlled. In practical application, under the control of the outlet valve 3, the incoming water source enters the water discharge pipe 4 from the water inlet pipe 1 through the lower pipe opening 43 of the water discharge pipe 4, and then is discharged into the second water outlet pipe 22 from the water outlet 41 of the water discharge pipe 4 to perform daily water consumption. The water for the water-related household appliances can be input into the water-related household appliances from the water inlet pipe 1 through the water inlet joint 11 under the limitation of the water outlet valve 3; when the household appliance for wading is drained, the water can be drained into the first water outlet pipe 21 through the drainage connector 211, so that the water flow is discharged to the outside.

In another embodiment of the present application, referring to fig. 3 to 6 together, the outlet valve 3 includes a pressing cap 31 and a flow-limiting column 32, the pressing cap 31 is disposed on an upper nozzle 42 of the outlet pipe 4, one end of the flow-limiting column 32 is connected to the pressing cap 31, and the other end of the flow-limiting column 32 penetrates out of a lower nozzle 43 of the outlet pipe 4 and extends into the inlet pipe 1; the flow-limiting column 32 is accommodated in the water discharge pipe 4, and a water passing gap is arranged between the outer wall of the flow-limiting column 32 and the inner wall of the water discharge pipe 4; and a flow limiting cover 33 for sealing the lower nozzle 43 is further arranged at one end of the flow limiting column 32 communicated with the water inlet pipe 1. The user can press the pressing cap 31, namely the water outlet valve 3 can be operated to realize water discharge control, the switch operation is effectively simplified, and the use by the user is convenient.

In another embodiment of the present application, referring to fig. 4 to 6, a first elastic element 34 for pushing the flow limiting column 32 to move upward is disposed between the pressing cap 31 and the upper nozzle 42 of the water discharging pipe 4, so that the flow limiting cap 33 closes the lower nozzle 43 normally, and the first elastic element 34 may preferably be a return spring with an expansion force, and is sleeved with the flow limiting column 33. The water outlet valve 3 forms a normally closed valve which can effectively close the water discharge pipe 4 so as to keep the water supply for the wading household appliances. When the user needs daily water, the water outlet valve 3 can be operated to discharge water, so that the water flow is discharged from the second water outlet pipe 22 for use in a controllable mode.

In another embodiment of the present application, referring to fig. 6, a sealing ring 35 is further disposed on the flow limiting column 32, a fixing groove 321 for mounting the sealing ring 35 is disposed on the periphery of the flow limiting column 32, and the fixing groove 321 is disposed adjacent to the flow limiting cover 33, so that the sealing ring 35 is tightly attached to the flow limiting cover 33, thereby effectively improving the sealing performance of closing the lower nozzle 43.

In another embodiment of the present application, referring to fig. 3 to 6, a slot 311 for connecting with the flow limiting column 32 is disposed at the bottom of the pressing cap 31, a protruding ring 421 disposed around the upper nozzle 42 is disposed on the water discharging pipe 4, and a ring opening of the protruding ring 421 is smaller than a groove opening of the slot 311, so that the pressing cap 31 can be covered on the protruding ring 421 through the slot 311; the first elastic member 34 is sleeved on the flow limiting column 32 and is accommodated in the slot 311 to abut against the convex ring 421. The flow-limiting column 32 is pressed by the pressing cap 31 to form a vertically downward moving motion track, which can effectively improve the concentricity between the flow-limiting column 32 and the water discharge pipe 4, ensure that the water passing gap between the outer wall of the flow-limiting column 32 and the inner wall of the water discharge pipe 4 is kept smooth, and ensure that the water outlet valve 3 can smoothly discharge water flow after being opened. When a user presses the pressing cap 31 to discharge water, the slot 311 of the pressing cap 31 simultaneously covers the convex ring 421 to tightly close the upper pipe orifice 42 of the water discharge pipe 4, thereby preventing water in the water discharge pipe 4 from leaking out of the upper pipe orifice 42 to cause water leakage.

In another embodiment of the present application, please refer to fig. 6 to 8 together, a quick connector connected to an incoming water source is further disposed on the water inlet pipe 1, the quick connector includes a movable buckle 5 disposed on the water inlet pipe 1 and a fixing head 6 mounted on the incoming water source, the movable buckle 5 includes a sleeve 51, a second elastic member 52 and a buckle bead 53, a mounting hole 12 for mounting the buckle bead 53 is disposed on the water inlet pipe 1, a mounting groove 13 for mounting the second elastic member 52 is disposed on an outer wall of the water inlet pipe 1, and the mounting hole 12 is disposed in the mounting groove 13; one end of the fixed head 6 is provided with an inserting pipe 61 for inserting the water inlet pipe 1, and the inserting pipe 61 is provided with a buckling groove 611 buckled with the buckling bead 53; the sleeve 51 is sleeved on the periphery of the water inlet pipe 1, and the sleeve 51 is provided with a pressing ring 511 for pushing and pressing the second elastic piece 52 to release the buckling beads 53. The second elastic member 52 may preferably be a compressible spring having compression and self-return properties. In this embodiment, quick-operation joint's one end is passed through fixed head 6 and is connected fixedly with the access water source, and quick-operation joint's the other end sets up the activity on inlet tube 1 and detains 5, and the activity is detained and can be realized quick-operation joint with fixed head 6, simplifies the installation operation effectively, improves the installation effectiveness. In practical operation, the water inlet pipe 1 and the insertion pipe 61 of the fixing head 6 can be directly inserted and fixed, so that the fastening bead 53 on the water inlet pipe 1 and the fastening groove 611 on the insertion pipe 61 are fastened and fixed. When the water inlet pipe 1 needs to be detached, the sleeve 51 can be operated to compress the second elastic element 52 to release the fastening bead 53, so that the fastening bead 53 can be disengaged from the fastening groove 611 on the plug pipe 61, and the water inlet pipe 1 can be smoothly separated from the plug pipe 61.

In another embodiment of the present application, referring to fig. 7 to 9, a limiting ring 14 is further disposed on the mounting groove 13 of the water inlet pipe 1, and the pressing ring 511 is pushed by the second elastic member 52 to abut against the limiting ring 14. Not only can effectively prevent the sleeve 51 from dropping off from the water inlet pipe 1, but also can enable the buckling beads 53 to be always in a locking state, thereby effectively ensuring the connection stability of the water inlet pipe 1 and the inserting pipe 61.

On the basis, the end part of the sleeve 51 is provided with a stop ring 512 for preventing the buckling bead 53 from coming off, and the stop ring 512 is arranged adjacent to the pressing ring 511; the periphery of the water inlet pipe 1 is also provided with a limiting ring 15 which is used for abutting against the sleeve 51 to limit the displacement stroke of the sleeve 51. When the user operates the sleeve 51 to press the second elastic member 52 downwards to release the fastening bead 53, the limiting ring 15 abuts against the sleeve 51 to limit the displacement stroke of the sleeve 51, and simultaneously, the blocking ring 512 is displaced to the mounting hole 12 of the water inlet pipe 1, thereby preventing the fastening bead 53 from being removed.

In another embodiment of the present application, referring to fig. 8 to 9, a first sealing ring 612 is further disposed on an outer periphery of the insertion tube 61, and the first sealing ring 612 is in interference fit with an inner wall of the water inlet pipe 1 to seal a water penetration gap between an outer wall of the insertion tube 61 and the inner wall of the water inlet pipe 1, so as to effectively improve a sealing performance.

In another embodiment of the present application, referring to fig. 10, the other end of the fixing head 6 is provided with an internal thread 62 and an external thread 63 for connecting with a water source, so that the screw connection structure of the water source can be effectively compatible, and the applicability can be improved.

In addition, in another embodiment of the present application, referring to fig. 10, a detachable second sealing ring 64 is disposed in the other end of the fixing head, so as to effectively seal a water leakage gap between the fixing head and the water source. The second sealing ring 64 may preferably be a detachable sealing ring set, and covers the internal thread 62. When the fixing head 6 is connected with the water inlet through the external thread 63, the second sealing ring 64 only serves to seal the water penetration gap; when the fixing head 6 is required to be connected with the access water source through the internal threads 62, the second sealing ring 64 can be removed to expose the internal threads 62, so that the threaded connection of the internal threads 62 with the access water source is realized.

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 (10)

1. A waterway expansion device is characterized by comprising a water outlet pipe and a water inlet pipe connected with an accessed water source, wherein a water inlet joint connected with a household appliance in a wading manner is arranged on the water inlet pipe; the outlet pipe includes first outlet pipe and second outlet pipe, first outlet pipe is equipped with the drainage joint of being connected with the household electrical appliances of wading, the second outlet pipe with be equipped with the outlet valve between the inlet tube, the outlet valve is used for right the access water source to the water of second outlet pipe is controlled.

2. The waterway extension device of claim 1, wherein a drain pipe for installing the drain valve is arranged between the second outlet pipe and the inlet pipe, and a water outlet communicated with the second outlet pipe is arranged on the drain pipe; the water discharge pipe is also provided with an upper pipe orifice communicated with the outside and a lower pipe orifice communicated with the water inlet pipe; the water outlet valve is arranged on the water discharge pipe and opens and closes a water passing channel from the lower pipe orifice to the water outlet.

3. The waterway expansion device of claim 2, wherein the outlet valve comprises a pressing cap and a flow-limiting column, the pressing cap is arranged on the upper nozzle of the water outlet pipe, one end of the flow-limiting column is connected with the pressing cap, and the other end of the flow-limiting column penetrates out of the lower nozzle of the water outlet pipe and extends into the water inlet pipe; the flow limiting column is accommodated in the water discharge pipe, and a water passing gap is formed between the outer wall of the flow limiting column and the inner wall of the water discharge pipe; and one end of the flow limiting column communicated with the water inlet pipe is also provided with a flow limiting cover for sealing the lower pipe orifice.

4. The waterway expansion device of claim 3, wherein a first elastic member for pushing the flow-limiting post to move upward so that the flow-limiting cover normally closes the lower nozzle is disposed between the pressing cap and the upper nozzle of the water discharge pipe, and the first elastic member is sleeved with the flow-limiting post.

5. The waterway extension device of claim 4, wherein a sealing ring is further disposed on the current-limiting column, a fixing groove for mounting the sealing ring is disposed on the periphery of the current-limiting column, and the fixing groove is disposed adjacent to the current-limiting cover.

6. The waterway extension device of claim 4, wherein the bottom of the pressing cap is provided with a slot for connecting with the flow-limiting column, the water discharge pipe is provided with a convex ring arranged around the upper nozzle, and the ring opening of the convex ring is smaller than the notch of the slot, so that the pressing cap covers the convex ring through the slot; the first elastic piece is sleeved on the flow limiting column and contained in the slot to abut against the convex ring.

7. The waterway extension device of any one of claims 1 to 6, wherein the water inlet pipe is further provided with a quick connector connected with the water source, the quick connector comprises a movable buckle arranged on the water inlet pipe and a fixing head mounted on the water source, the movable buckle comprises a sleeve, a second elastic member and a buckle bead, the water inlet pipe is provided with a mounting hole for mounting the buckle bead, the outer wall of the water inlet pipe is provided with a mounting groove for mounting the second elastic member, and the mounting hole is arranged in the mounting groove; one end of the fixing head is provided with an inserting pipe for inserting the water inlet pipe, and the inserting pipe is provided with a buckling groove buckled with the buckling bead; the sleeve is sleeved on the periphery of the water inlet pipe, and the sleeve is provided with a pressing ring used for pushing and pressing the second elastic piece to release the buckling beads.

8. The waterway extension device of claim 7, wherein a limiting ring is arranged on the mounting groove of the water inlet pipe, and the pressing ring is pushed by the second elastic member to abut against the limiting ring; the end part of the sleeve is provided with a stop ring for preventing the buckling beads from falling off, and the stop ring is arranged adjacent to the pressing ring; the periphery of the water inlet pipe is also provided with a limiting ring which is used for abutting against the sleeve to limit the displacement stroke of the sleeve.

9. The waterway extension device of claim 8, wherein a first sealing ring is further disposed on the outer circumference of the insertion tube, and the first sealing ring is in interference fit with the inner wall of the water inlet tube.

10. The waterway extension device of claim 7, wherein the other end of the fixed head is provided with an internal thread and an external thread for connecting with the water source, and the other end of the fixed head is provided with a detachable second sealing ring which is covered on the internal thread.

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