CN211849797U

CN211849797U - Water inlet valve

Info

Publication number: CN211849797U
Application number: CN202020297522.3U
Authority: CN
Inventors: 陈子鸿
Original assignee: Guangdong Anboly Sanitary Technology Co ltd
Current assignee: Guangdong Anboly Sanitary Technology Co ltd
Priority date: 2020-03-11
Filing date: 2020-03-11
Publication date: 2020-11-03
Anticipated expiration: 2030-03-11

Abstract

The utility model discloses a water inlet valve, which is arranged in a water tank and is used for filling water into the water tank, the water inlet valve comprises a main body and a control floating barrel which can move up and down relative to the main body, the water inlet valve is controlled to be opened for water inflow when the control floating barrel falls, and the water inlet valve is controlled to be closed to stop water inflow when the control floating barrel rises; the water tank water level control device is characterized by further comprising a limiting mechanism and an unlocking mechanism, the limiting mechanism limits the control floating barrel which falls and opens the water inlet valve to prevent the control floating barrel from rising under the action of buoyancy, and the unlocking mechanism is linked with the limiting mechanism when the water tank water level falls below a position where the control floating barrel cannot rise under the action of buoyancy, so that the limiting mechanism is enabled to release the limitation on the control floating barrel. The utility model discloses can solve the control keg float and be forced to push down in order to open the water intaking valve after, not descend to preset position at the water tank water level and lead to the problem that the control keg float can be refloated under the buoyancy effect to can realize the function of intaking in advance of water intaking valve.

Description

Water inlet valve

Technical Field

The utility model relates to a water inlet valve.

Background

The toilet tank is usually provided with a water inlet valve, and the water inlet of the toilet tank is controlled through the water inlet valve. In the prior art, the water inlet valve usually adopts a transmission mechanism such as a linkage connecting rod for controlling the floating barrel to control the water inlet of the water tank, when the floating barrel falls, the linkage transmission mechanism controls the water inlet valve to open for water inlet, and when the floating barrel rises, the linkage transmission mechanism controls the water inlet valve to close for stopping water inlet. The rising or falling of the floating barrel is usually determined by the water level in the water tank, when the water level of the water tank is lowered to the state that the buoyancy of the floating barrel is insufficient, the floating barrel is controlled to fall and the transmission mechanism is linked to open the water inlet valve to feed water, and when the water level of the water tank is raised to the state that the buoyancy of the floating barrel is sufficient, the floating barrel is controlled to rise and the transmission mechanism is linked to control the water inlet valve to stop feeding water.

However, in some cases, it is necessary to start the water supply in advance by forcibly pushing down the control float by an external force to open the water inlet valve before the water level of the tank has not yet dropped to such an extent that the control float can fall. The structure of the existing water inlet valve obviously cannot meet the requirement of advanced water inlet of the water inlet valve, because once the external force is removed, the control floating barrel still floats again under the action of buoyancy force due to the fact that the water level of the water tank is still high at the moment, advanced water inlet cannot be achieved unless the external force is kept to continuously press down the control floating barrel forcibly, and the control floating barrel cannot float again under the action of buoyancy force until the water discharge valve in the water tank discharges water of the water tank to the position where the water level is lowered to be low enough.

SUMMERY OF THE UTILITY MODEL

The utility model provides a solve above-mentioned problem, provide a water intaking valve, it can solve the control flotation tank and be forced to push down in order to open the water intaking valve after, does not descend to preset position at the water tank water level and leads to the problem that the control flotation tank can be refloated under the buoyancy effect to can realize the function of intaking in advance of water intaking valve.

In order to achieve the purpose, the utility model provides the following technical scheme:

a water inlet valve is installed in a water tank and used for filling the water tank with water, the water inlet valve comprises a main body and a control floating barrel capable of moving up and down relative to the main body, the control floating barrel controls the water inlet valve to be opened to feed water when falling, and controls the water inlet valve to be closed to stop feeding water when rising;

the water tank water level control device is characterized by further comprising a limiting mechanism and an unlocking mechanism, the limiting mechanism limits a control floating barrel which falls and opens the water inlet valve to prevent the control floating barrel from rising under the action of buoyancy, and the unlocking mechanism is linked with the limiting mechanism when the water tank water level falls below a position where the control floating barrel cannot rise under the action of buoyancy, so that the limiting mechanism is released from limiting the control floating barrel.

As a further improvement of the above scheme, the unlocking mechanism includes an unlocking floating barrel which moves up and down along with the water level of the water tank, the unlocking floating barrel falls down along with the water level of the water tank to a position below which the control floating barrel cannot rise under the action of buoyancy, and the unlocking floating barrel is linked with the limiting mechanism when falling so that the limiting mechanism relieves the limitation on the control floating barrel.

As a further improvement of the above scheme, the limiting mechanism comprises a limiting member movably attached to the control floating barrel and a limiting fitting member fixedly arranged relative to the main body, and the limiting member can move between a limiting position and a yielding position relative to the control floating barrel;

when the limiting piece is located at the limiting position, the limiting fitting piece can limit the limiting piece so as to prevent the control floating barrel from rising to a water stopping position for controlling the water inlet valve to be closed under the action of buoyancy;

when the limiting piece is located at the yielding position, the limiting fitting piece yields the limiting piece, so that the control floating barrel can ascend to a water stopping position for controlling the water inlet valve to be closed under the action of buoyancy;

when the unlocking floating barrel falls down, the limiting piece is linked to enable the limiting piece to move to the yielding position from the limiting position.

As a further improvement of the above scheme, the locating part is a swing switching and is in spacing pendulum rod on the control floating bucket, the lower part of spacing pendulum rod rotates with the control floating bucket to be connected, spacing pendulum rod is located during the limiting position, the upper portion of spacing pendulum rod can with spacing fitting piece is spacing to cooperate mutually, spacing pendulum rod is located during the position of stepping down, the upper portion of spacing pendulum rod with spacing fitting piece cooperation of stepping down.

As a further improvement of the above scheme, one side of the limiting swing rod, which is close to the unlocking floating barrel, is provided with a protruding part, the unlocking floating barrel is provided with a driving inclined plane matched with the protruding part, and the unlocking floating barrel falls down through the driving inclined plane and the protruding part to be matched with each other so that the limiting swing rod swings from the limiting position to the yielding position.

As a further improvement of the above solution, the limit fitting member is an inverted L-shaped member fixedly arranged opposite to the main body, the inverted L-shaped member has a transverse wall and a longitudinal wall, and when the limit member moves to the limit position, a limit portion of the limit member, which is in limit fit with the limit fitting member, is located below the transverse wall; when the limiting part is limited by the limiting fitting part, the limiting part on the limiting part is abutted with the lower surface of the transverse wall.

As a further improvement of the above scheme, the water inlet valve further comprises a first small water tank fixedly arranged on the main body, the first small water tank is communicated with an inner cavity of the water tank so that water in the water tank can enter and exit the first small water tank, the unlocking floating barrel and the control floating barrel are both arranged in the first small water tank, and the limit matching piece is fixedly arranged on the first small water tank; alternatively, the first and second electrodes may be,

the water inlet valve further comprises a second small water tank and a third small water tank which are arranged independently, the second small water tank and the third small water tank are fixedly arranged on the main body respectively, the second small water tank and the third small water tank are communicated with the inner cavity of the water tank respectively so that water in the water tank can enter and exit the second small water tank and the third small water tank, the control floating barrel is arranged in the second small water tank, and the unlocking floating barrel is arranged in the third small water tank.

As a further improvement of the above scheme, the limiting part moves from the abdicating position to the limiting position under the action of self gravity, the action of a counterweight or the action of elastic force of the elastic part.

As a further improvement of the above scheme, in the water tank water inlet process, the control floating barrel floats before the unlocking floating barrel floats.

As a further improvement of the above scheme, the automatic water supply device further comprises a steering mechanism for switching and controlling the flow direction of water flow of the water outlet channel of the water inlet valve, and the unlocking floating barrel is in linkage fit with the steering mechanism; when the unlocking floating barrel is positioned at the floating position, the steering mechanism switches the water flow of the water outlet channel into a first channel communicated with the toilet seat washing channel; when the unlocking floating barrel is located at the falling position, the steering mechanism switches the water flow of the water outlet channel into a second channel communicated with the inner cavity of the water tank.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a set up stop gear and release mechanism, stop gear is spacing to the whereabouts and open the control keg float of water intaking valve and is ascending under the buoyancy effect with the prevention control keg float, like this, can solve under stop gear's effect and control the keg float and be forced to push down in order to open the water intaking valve after, does not descend to preset position at the water tank water level and leads to controlling the problem that the keg float can be refloated under the buoyancy effect to can realize the function of intaking in advance of water intaking valve.

And because the unlocking mechanism is linked with the limiting mechanism when the water level of the water tank falls below the position where the control floating barrel cannot rise under the action of buoyancy, the limiting mechanism is enabled to release the limitation on the control floating barrel, so that the problem that the control floating barrel cannot normally float due to limitation of the limiting mechanism in the process that the water level of the water tank falls below the position where the control floating barrel falls and water enters again can be avoided, and the normal water stopping function of the water inlet valve is ensured.

2. The unlocking mechanism comprises an unlocking floating barrel, the limiting mechanism is linked when the unlocking floating barrel falls so that the limiting mechanism can release the limit on the control floating barrel, and the unlocking mechanism is simple and easy to realize.

3. The limiting mechanism comprises a limiting part movably connected to the control floating barrel in a mounting mode and a limiting matching piece fixedly arranged relative to the main body, the limiting part can relatively control the floating barrel to move between a limiting position and a yielding position, the limiting part is linked to move from the limiting position to the yielding position when the unlocking floating barrel falls, the limiting part moves from the yielding position to the limiting position under the action of self gravity or under the action of a balance weight or under the action of elastic force of the elastic piece, and the limiting mechanism is simple, easy to achieve and reliable in function.

4. The limiting part is a limiting swing rod which is in swing transfer connection with the control floating barrel, the lower portion of the limiting swing rod is in rotation connection with the control floating barrel, when the limiting swing rod is located at a limiting position, the upper portion of the limiting swing rod can be in limiting fit with a limiting fitting piece, and when the limiting swing rod is located at a yielding position, the upper portion of the limiting swing rod is in yielding fit with the limiting fitting piece. The locating part has the advantages of ingenious structural design, simple structure and reliable function.

5. In the water inlet process of the water tank, the floating barrel is controlled to float before the unlocking floating barrel floats, so that the problem that the floating barrel cannot normally float to close the water inlet valve due to the fact that the limiting part moves to the limiting position again from the yielding position after the unlocking floating barrel floats in advance can be avoided, and the design function is more reliable.

Drawings

In order that the advantages of the invention will be readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered to be limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings. In the drawings:

FIG. 1 is an exploded perspective view of a water inlet valve according to a preferred embodiment of the present invention

FIG. 2 is an assembled perspective view of a fill valve according to a preferred embodiment of the present invention;

FIG. 3 is a cross-sectional view of a fill valve according to a preferred embodiment of the present invention in a water stop position;

fig. 4 is a sectional view of the water inlet valve opening for water inlet after the floating barrel is controlled to be just pressed down forcibly according to a preferred embodiment of the present invention, at which time the unlocking floating barrel keeps a floating state;

fig. 5 is a cross-sectional view of the inlet valve according to a preferred embodiment of the present invention, after the external force for pressing the floating barrel is removed, the floating barrel is controlled to float a small distance again under the action of buoyancy, so that the limiting member abuts against the limiting fitting member for limiting;

FIG. 6 is a cross-sectional view of the inlet valve according to a preferred embodiment of the present invention when the unlocking float falls and the limiting member is linked such that the limiting member moves to the abdicating position;

FIG. 7 is a perspective view of the fill valve of FIG. 6;

fig. 8 is a perspective view illustrating a control float of a water inlet valve according to a preferred embodiment of the present invention;

FIG. 9 is a perspective view of a limit swing link of the inlet valve according to a preferred embodiment of the present invention;

FIG. 10 is a perspective view of an unlocking float of the inlet valve according to a preferred embodiment of the present invention;

FIG. 11 is a perspective view of the engagement between the small tank and the stop fitting of the inlet valve according to a preferred embodiment of the present invention.

The reference signs are:

10-a body; 11-a water outlet channel;

20-controlling the floating barrel; 21-a pivot shaft;

30-unlocking the floating barrel; 31-a drive ramp;

40-a limiting mechanism; 41-limit piece (limit swing link); 411-a boss; 412-a limiting part; 413-a pivot joint; 42-a positive stop fitting; 421-transverse wall; 422-longitudinal wall;

50-a first small water tank; 51-a first cavity; 52-a second chamber;

60-steering mechanism, 61-first channel; 62-second channel.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention clearer and more obvious, the following description of the present invention with reference to the accompanying drawings and embodiments is provided for further details. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the following discussion, details are given to provide a more thorough understanding of the present invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details. In certain instances, some features that are known in the art have not been described in detail in order to avoid obscuring the present invention. It is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like are used herein for purposes of illustration only and are not to be construed as limiting.

Ordinal words such as "first" and "second" are referred to in this application as labels only, and do not have any other meanings, such as a particular order, etc. Also, for example, the term "first component" does not itself imply the presence of "second component", and the term "second component" does not itself imply the presence of "first component".

Referring to fig. 1 to 9, a water inlet valve according to a preferred embodiment of the present invention is installed in a water tank (not shown) for filling the water tank with water. The water inlet valve comprises a main body 10 and a control floating barrel 20 which can move up and down relative to the main body 10, wherein the water inlet valve is controlled to be opened for water inlet when the control floating barrel 20 falls, and the water inlet valve is controlled to be closed to stop water inlet when the control floating barrel 20 rises. It is known in the art to control the float 20 to stop or open the inlet valve by controlling the rising or falling of the float, and the specific control principle and control process thereof are not described in detail herein, and generally, if the inlet valve is a differential pressure inlet valve, the float 20 is controlled to open or close a pressure relief port (not shown) communicating with a back pressure chamber (not shown) of the inlet valve by a transmission mechanism such as a link, so as to control the inlet valve to stop or open the inlet valve.

The water inlet valve also comprises a limiting mechanism 40 and an unlocking mechanism, the limiting mechanism 40 limits the floating barrel 20 which falls and opens the control of the water inlet valve so as to prevent the floating barrel 20 from rising under the action of buoyancy, thus the problem that the floating barrel 20 can be controlled to float again under the action of buoyancy when the water level of the water tank is not reduced to a preset position after the floating barrel 20 is forcibly pressed down to open the water inlet valve can be solved under the action of the limiting mechanism 40, and the function of advanced water inlet of the water inlet valve can be realized.

The unlocking mechanism is linked with the limiting mechanism 40 when the water level of the water tank falls below the position where the control floating barrel 20 cannot rise under the action of buoyancy (at the moment, the upward buoyancy on the floating barrel 20 is not enough to overcome the downward force on the floating barrel 20), so that the limiting mechanism 40 releases the limiting on the control floating barrel 20. Therefore, the problem that the floating barrel 20 cannot normally float due to the limitation of the limiting mechanism 40 in the process of re-feeding water into the water tank after the water level of the water tank falls below the position where the floating barrel 20 is controlled to fall can be avoided, and the normal water stopping function of the water inlet valve is ensured.

Specifically, the limiting mechanism 40 includes a limiting member 41 movably attached to the control pontoon 20 and a limiting fitting member 42 fixedly disposed opposite to the main body 10, and the limiting member 41 can move between a limiting position and a yielding position relative to the control pontoon 20; when the limiting member 41 is located at the limiting position, the limiting fitting member 42 can limit the limiting member 41 so as to prevent the control floating barrel 20 from rising to the water stopping position for controlling the closing of the water inlet valve under the action of buoyancy; when the limiting member 41 is at the receding position, the limiting fitting member 42 recedes the limiting member 41 so that the control floating barrel 20 can ascend to the water stopping position for controlling the closing of the water inlet valve under the buoyancy.

The unlocking mechanism comprises an unlocking floating barrel 30 moving up and down along with the water level of the water tank, the unlocking floating barrel 30 falls down along with the water level of the water tank when the control floating barrel 20 cannot rise under the action of buoyancy, the limiting mechanism 40 is linked when the unlocking floating barrel 30 falls so that the limiting mechanism 40 relieves the limiting on the control floating barrel 20, and specifically, the linkage limiting piece 41 enables the linkage limiting piece 41 to move from the limiting position to the yielding position when the unlocking floating barrel 30 falls.

In this embodiment, the limiting member 41 is a limiting swing rod 41 swinging and rotating on the control float 20, the lower portion of the limiting swing rod 41 is rotatably connected to the control float 20, specifically, the lower portion of the limiting swing rod 41 is provided with a pivoting portion 413, the pivoting portion 413 is a pivoting hole, the lower portion of the control float 20 is provided with a pivoting shaft 21, and the limiting swing rod 41 is rotatably connected to the control float 20 through the pivoting cooperation between the pivoting shaft 21 and the pivoting hole. When the limiting swing rod 41 is located at the limiting position, the upper portion of the limiting swing rod 41 can be in limiting fit with the limiting fitting piece 42, and when the limiting swing rod 41 is located at the yielding position, the upper portion of the limiting swing rod 41 is in yielding fit with the limiting fitting piece 42.

In the present embodiment, the limit fitting element 42 is an inverted L-shaped member fixedly disposed opposite to the main body 10, the inverted L-shaped member has a transverse wall 421 and a longitudinal wall 422, when the limiting element 41 moves to the limiting position, the limiting portion 412 of the limiting element 41, which is in limit fit with the limit fitting element 42, is located below the transverse wall 421; when the stopper 41 is stopped by the stopper fitting 42, the stopper portion 412 of the stopper 41 abuts against the lower surface of the lateral wall 421.

Preferably, a protruding portion 411 is arranged on one side of the limiting swing rod 41 close to the unlocking floating barrel 30, a driving inclined surface 31 matched with the protruding portion 411 is arranged on the unlocking floating barrel 30, and the limiting swing rod 41 is matched with the protruding portion 411 through the driving inclined surface 31 when the unlocking floating barrel 30 falls down so that the limiting swing rod 41 swings from a limiting position to a yielding position.

In this embodiment, the water dispenser further includes a first small water tank 50 fixedly disposed on the main body 10, the first small water tank 50 is communicated with an inner cavity of the water tank so that water in the water tank can enter and exit the first small water tank 50, and the unlocking float 30 and the control float 20 are both disposed in the first small water tank 50 to rise or fall with a water level in the first small water tank 50. The stop fitting 42 is fixedly arranged on the first small water tank 50. The bottom of the first small water tank 50 is provided with a check valve (not shown) that allows water in the first small water tank 50 to flow out into the water tank through the check valve, but does not allow water in the water tank to flow into the first small water tank 50 through the check valve.

In the present embodiment, when the unlocking float 30 is not linked to the limiting member 41, the limiting member 41 moves from the receding position to the limiting position by its own weight. Alternatively, a configuration block (not shown) may be optionally provided on the limiting member 41, and the limiting member 41 may move from the abdicating position to the limiting position under the action of a counterweight of the configuration block; still alternatively, the elastic force of the elastic member may be selected to move the limiting member 41 from the receding position to the limiting position. The movement of the limiting member 41 from the receding position to the limiting position can be achieved in various ways, and is not limited to the above-mentioned several ways.

In order to make the utility model discloses more reliable, further preferred, at the water tank in-process of intaking, control keg float 20 floats before unblock keg float 30 floats, can avoid unblock keg float 30 to float after in advance like this, locating part 41 again by stepping down the position activity to limiting position and lead to the problem that control keg float does not have 20 normal floaters in order to close the water intaking valve. Floating the control buoy 20 before floating the unlocking buoy 30 can be achieved by: separate the inner chamber of first little water tank 50 for first chamber 51 and second chamber 52, will control the keg float 20 and set up in first intracavity 51, will unblock keg float 30 and set up in second chamber 52, the water tank in-process of intaking, the water of water tank inner chamber flows into first chamber 51 earlier, and rethread first chamber 51 flows into second chamber 52, and the water level in first chamber 51 will rise earlier like this to make control keg float 20 float earlier than unblock keg float 30. Of course, other control methods may be used, such as providing a restriction between the control float 20 and the unlocking float 30, allowing the unlocking float 30 to float only after the control float 20 floats, and so on.

In this embodiment, the control float 20 and the unlocking float 30 are both selectively disposed in the same small water tank (i.e., the first small water tank 50), it can be understood that in other embodiments, two small water tanks disposed relatively independently, i.e., a second small water tank (not shown) and a third small water tank (not shown), may be selectively disposed, such that the second small water tank and the third small water tank are respectively fixedly disposed on the main body 10, the second small water tank and the third small water tank are respectively communicated with the inner cavity of the water tank to enable water in the water tank to enter and exit the second small water tank and the third small water tank, the control float 20 is disposed in the second small water tank, and the unlocking float 30 is disposed in the third small water tank. The bottoms of the second small water tank and the third small water tank are respectively provided with a one-way valve, and the one-way valves allow water in the small water tanks to flow out into the water tanks through the one-way valves, but do not allow the water in the water tanks to flow into the small water tanks through the one-way valves. Also, in order to allow the control float 20 to float before the unlocking float 30 floats during the tank inflow, the second small tank housing the control float 20 may be selected to be positioned lower than the third small tank housing the unlocking float 30, so that the flow of water preferentially flows into the second small tank to float the control float 20 earlier than the unlocking float 30 during the tank inflow.

In this embodiment, the water outlet channel 11 of the water inlet valve further comprises a steering mechanism 60 for switching and controlling the flow direction of the water, and the unlocking floating barrel 30 is in linkage fit with the steering mechanism 60. When the unlocking floating barrel 30 is in the floating position, the steering mechanism 60 switches the water flow of the water outlet channel 11 to a first channel 61 communicated with the toilet seat channel, so that the toilet seat channel is supplied with water through the first channel 61 to flush the inner wall of the urinal of the toilet by using the part of the water flow which is fed in advance by the water inlet valve; when the unlocking float 30 is in the falling position, the steering mechanism 60 switches the flow of water from the water outlet passage 11 to the second passage 62 communicating with the inner cavity of the water tank, so that the water tank is filled with water through the second passage 62.

The steering mechanism 60 may adopt a valve plate structure (not shown) to be in linkage fit with the unlocking float 30, wherein the valve plate structure is movable between a first position communicating the water outlet channel 11 with the first channel 61 and a second position communicating the water outlet channel 11 with the second channel 62.

The working process of the embodiment is specifically as follows:

referring to fig. 3, at this time, the water inlet valve is in a water stop state, the floating barrel 20 and the unlocking floating barrel 30 are both in a floating state, and the floating barrel 20 controls the water inlet valve to stop water inlet.

When the water inlet valve is required to advance water inlet, an external force is applied to enable the floating barrel 20 to fall and open the water inlet valve, at this time, as shown in fig. 4, the limiting swing rod 41 falls to the lower side of the transverse wall 421 of the limiting fitting piece 42 along with the floating barrel 20, and the limiting swing rod 41 swings to the limiting position from the abdicating position under the action of self gravity. Since the water level in the tank is still high, the unlocking float 30 is kept in a floating state, and at this time, the steering mechanism 60 switches the water flow of the water outlet channel 11 to the first channel 61 communicated with the toilet seat channel, so that the toilet seat channel is supplied with water through the first channel 61 to flush the inner wall of the toilet bowl by the part of the water flow which is fed in advance by the water inlet valve.

When the external force is removed, because the water level in the water tank is still high, at this time, as shown in fig. 5, the floating barrel 20 is controlled to rise again under the action of buoyancy, but because the limit swing rod 41 is located at the limit position, the limit swing rod 41 is abutted and matched with the transverse wall 421 of the limit matching piece 42 after the floating barrel 20 rises for a short distance along with the control, and the transverse wall 421 limits the floating barrel 20 to continue rising, so that the problem that the function of water inlet in advance is failed because the floating barrel 20 is controlled to rise again under the action of buoyancy and the water inlet valve is closed is avoided. Therefore, the purpose that the water inlet valve starts to feed water after the floating barrel 20 is controlled to fall down without waiting for the water level of the water tank to fall to a preset position is achieved, and the part of inlet water flow of the inlet water is used for flushing the closestool.

As shown in fig. 6, when the water in the water tank is discharged to the water tank through a drainage device such as a drain valve, and the water tank falls to a position where the buoyancy of the control float 20 and the unlocking float 30 is insufficient, the unlocking float 30 falls and then is linked with the steering mechanism 60, so that the steering mechanism 60 switches the water flow of the water outlet channel 11 to a second channel 62 communicated with the inner cavity of the water tank, the water tank is filled with water through the second channel 62, and the switching of the flow direction of the water flow is realized.

After the unlocking floating barrel 30 falls down, the driving inclined surface 31 on the unlocking floating barrel 30 abuts against the convex part 411 on the limiting swing rod 41 and drives the limiting swing rod 41 to swing from the limiting position to the yielding position, so that after the water level in the water tank rises again, the control floating barrel 20 can normally float without being blocked by the limiting fitting piece 42 for limiting, and the water inlet valve can be normally closed. After the control float 20 floats, the unlocking float 30 also floats by the buoyancy, thereby returning to the water stop state as shown in fig. 4.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "component" and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

While the foregoing specification illustrates and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the invention as expressed in the above teachings or as determined by the person of ordinary skill in the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. A water inlet valve is installed in a water tank and used for filling the water tank with water, the water inlet valve comprises a main body and a control floating barrel capable of moving up and down relative to the main body, the control floating barrel controls the water inlet valve to be opened to feed water when falling, and controls the water inlet valve to be closed to stop feeding water when rising;

the water tank water level control device is characterized by further comprising a limiting mechanism and an unlocking mechanism, the limiting mechanism limits the control floating barrel which falls and opens the water inlet valve so as to prevent the control floating barrel from rising under the action of buoyancy, and the unlocking mechanism is linked with the limiting mechanism when the water tank water level falls below a position where the control floating barrel cannot rise under the action of buoyancy, so that the limiting mechanism is enabled to release the limiting of the control floating barrel.

2. The water inlet valve according to claim 1, wherein the unlocking mechanism comprises an unlocking floating barrel which moves up and down along with the water level of the water tank, the unlocking floating barrel falls down along with the water level of the water tank below a position where the control floating barrel cannot rise under the action of buoyancy, and the unlocking floating barrel is linked with the limiting mechanism to enable the limiting mechanism to release the limitation on the control floating barrel when falling.

3. The water inlet valve according to claim 2, wherein the limiting mechanism comprises a limiting member movably attached to the control floating barrel and a limiting matching member fixedly arranged relative to the main body, and the limiting member can move between a limiting position and a yielding position relative to the control floating barrel;

4. The water inlet valve according to claim 3, wherein the limiting member is a limiting swing rod which is swung and pivoted on the control floating barrel, the lower part of the limiting swing rod is rotatably connected with the control floating barrel, when the limiting swing rod is located at the limiting position, the upper part of the limiting swing rod can be in limiting fit with the limiting fitting member, and when the limiting swing rod is located at the abdicating position, the upper part of the limiting swing rod is in abdicating fit with the limiting fitting member.

5. The water inlet valve according to claim 4, wherein a protrusion is arranged on one side of the limiting swing rod close to the unlocking floating barrel, a driving inclined plane matched with the protrusion is arranged on the unlocking floating barrel, and when the unlocking floating barrel falls down, the driving inclined plane is matched with the protrusion so that the limiting swing rod swings from the limiting position to the abdicating position.

6. The water inlet valve according to claim 3, wherein the stop engaging member is an inverted L-shaped member fixedly disposed opposite to the main body, the inverted L-shaped member having a lateral wall and a longitudinal wall, and when the limiting member moves to the limiting position, a limiting portion of the limiting member in limit engagement with the stop engaging member is located below the lateral wall; when the limiting part is limited by the limiting fitting part, the limiting part on the limiting part is abutted with the lower surface of the transverse wall.

7. The water inlet valve according to claim 3, further comprising a first small water tank fixedly arranged on the main body, wherein the first small water tank is communicated with an inner cavity of the water tank so that water in the water tank can enter and exit the first small water tank, the unlocking floating barrel and the control floating barrel are both arranged in the first small water tank, and the limit matching piece is fixedly arranged on the first small water tank; alternatively, the first and second electrodes may be,

8. The inlet valve according to any of claims 3 to 7, wherein the limiting member moves from the receding position to the limiting position under the action of its own weight, a weight, or the elastic force of an elastic member.

9. A water inlet valve according to any one of claims 2 to 7 wherein the control float floats before the release float floats during inlet of the cistern.

10. The water inlet valve according to any one of claims 2 to 7, further comprising a steering mechanism for switching and controlling the flow direction of the water flow of the water outlet channel of the water inlet valve, wherein the unlocking floating barrel is in linkage fit with the steering mechanism; when the unlocking floating barrel is positioned at the floating position, the steering mechanism switches the water flow of the water outlet channel into a first channel communicated with the toilet seat washing channel; when the unlocking floating barrel is located at the falling position, the steering mechanism switches the water flow of the water outlet channel into a second channel communicated with the inner cavity of the water tank.