CN215257959U

CN215257959U - Float valve device and water tank device

Info

Publication number: CN215257959U
Application number: CN202023099951.9U
Authority: CN
Inventors: 刘果; 刘小菡
Original assignee: Suqian Hanshu Environmental Protection Equipment Co ltd
Current assignee: Suqian Hanshu Environmental Protection Equipment Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-12-21
Anticipated expiration: 2030-12-21

Abstract

The utility model discloses a ball-cock assembly and water tank device, this ball-cock assembly includes: a valve member, a float, and a rod member, the valve member including: a water inlet; a water outlet; a first chamber in communication with the water inlet; a second chamber in communication with the water outlet; the first valve core mechanism is used for controlling the connection and disconnection of the first chamber and the second chamber; a third chamber in direct or indirect communication with the water inlet to block the first chamber from the second chamber by pressurizing the first valve core mechanism with pressurized water directed from the water inlet; a control flow passage connected between the water outlet and the third chamber; the second valve core mechanism is used for controlling the on-off of the control flow channel; wherein: the float drives the second valve core mechanism by the rod component to control the on-off of the control flow passage.

Description

Float valve device and water tank device

Technical Field

The utility model relates to a water purification technology field especially relates to a ball-cock assembly and water tank device.

Background

In water purification technical field, the liquid level of water tank is usually controlled by utilizing a floating ball valve, so that external water sources can synchronously supply water to the water tank when water is taken from the water tank, and further quantitative water is always stored in the water tank.

Prior art float valves typically include a float that senses the level of the liquid in the tank and a valve member that controls the supply of water to the tank; the valve component is provided with a water inlet, a water outlet and a valve core positioned between the water inlet and the water outlet, and the water inlet is connected to a water source; the float is linked with the valve core in the valve component by a rod component (such as a connecting rod), when the liquid level descends to enable the float to move downwards, the rod component controls the valve core to be opened to enable the water inlet to be communicated with the water outlet, so that external water enters from the water inlet and flows out from the water outlet to supply water for the water tank, when the liquid level ascends to a certain height, the float moves upwards to control the valve core to be closed by the rod component, so that the water inlet and the water outlet are cut off, and further, a water source is controlled to stop supplying water for the water tank.

Although the above-mentioned ball cock can control the water supply from the water source to the tank, the float of the above-mentioned ball cock directly controls the valve core by the rod member, which results in the following disadvantages: the amount of water entering is difficult to obtain precise control.

In order to overcome the above-mentioned defects, a float valve has been proposed in the prior art, which uses the pressure of water to control the valve core to open and close, and specifically, a control flow channel is provided in the valve member, the control flow channel can guide the pressure water from the water source to apply pressure to the valve core, and the control flow channel forms a port outside the valve member, the opening and closing of the port is controlled by a float connecting rod member, after the port is opened, the control flow channel is depressurized to release the pressure of the valve core, the valve core is opened, and after the port is closed, the control flow channel is communicated with the pressure water source to reestablish the pressure, and then the valve core is pressurized again to close the valve core, so that the valve core can be controlled by the opening and closing of the control flow channel, and the water inlet amount can be controlled more accurately.

However, the ball cock of the above structure has the following drawbacks:

the stem member allows some of the water from the water supply to flow out of the port after the port controlling the flow passage is opened, which requires the valve member as a whole to be fitted inside the tank, which is disadvantageous for cleaning the valve member.

In addition, to reduce the flow of water out of the ports of the control flow passages, the ports are typically provided smaller and are susceptible to contact with air as the ports are located above the liquid level, which can easily foul the ports and increase the likelihood of port blockage.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that exists among the prior art, the embodiment of the utility model provides a ball-cock assembly and water tank device.

For solving the technical problem, the embodiment of the utility model adopts the following technical scheme:

a float valve apparatus comprising: a valve member, a float, and a rod member, the valve member including:

a water inlet;

a water outlet;

a first chamber in communication with the water inlet;

a second chamber in communication with the water outlet;

the first valve core mechanism is used for controlling the connection and disconnection of the first chamber and the second chamber;

a third chamber in direct or indirect communication with the water inlet to block the first chamber from the second chamber by pressurizing the first valve core mechanism with pressurized water directed from the water inlet;

a control flow passage connected between the water outlet and the third chamber;

the second valve core mechanism is used for controlling the on-off of the control flow channel; wherein:

the float drives the second valve core mechanism by the rod component to control the on-off of the control flow passage.

Preferably, a cylinder is formed inside the valve member, the first chamber is an annular chamber formed outside the cylinder, and the second chamber is a cylindrical chamber formed inside the cylinder; the first valve core mechanism controls the connection and disconnection of the first chamber and the second chamber by opening or closing a port of the cylinder.

Preferably, the first spool mechanism includes:

an elastic membrane arranged in a sealing way with the edge of the first chamber;

a valve plate disposed on the elastic membrane and opposite to the cylinder; wherein:

the valve plate seals the port of the cylinder body with a certain pretightening force by means of the pressure water in the third chamber.

Preferably, the third chamber is separated from the first chamber and the second chamber by the elastic membrane; wherein:

an overflowing hole is formed in the area, corresponding to the first cavity, of the elastic membrane, so that part of water entering the first cavity from the water inlet is guided to the third cavity through the overflowing hole.

Preferably, the port of the barrel is lower than the port of the first chamber.

Preferably, the control flow passage comprises a guide section and a control section; and the second valve core mechanism is used for controlling the on-off of the control section.

Preferably, the control section is a linear cavity end; the second valve core mechanism includes:

the valve seat is arranged on the linear cavity section, and a valve hole is formed in the valve seat;

a core provided at the valve hole to open or close the valve hole by a linear movement;

a valve stem having one end connected to the core and the other end protruding out of the valve member;

a spring for urging the core in a direction to close the valve hole; wherein:

the float drives the valve rod by means of the rod member so that the valve hole is opened.

Preferably, the linear cavity section is located outside the first cavity and coincides with the axial direction of the first cavity.

Preferably, the valve member further comprises a valve body and a valve cover; the first chamber and the second chamber are formed in the valve body, the valve cover is provided with an inner concave part, and the inner concave part and the valve body enclose the third chamber.

Preferably, the guide section is formed in the valve cover, and the control section is formed in the valve body.

Preferably, the end of the guide section is formed with a plug for insertion into a port of the control section and sealing arrangement by means of a sealing ring.

Preferably, the spring is interposed between the plug and the core.

Preferably, the rod component comprises a connecting rod which is pivoted on the valve body, a vertical moving rod is arranged on the float, the upper end of the vertical moving rod is connected to the tail part of the connecting rod, and the head part of the connecting rod is opposite to the valve rod;

the vertical moving rod penetrates through a tank cover of the water tank.

Preferably, the water inlet is connected to a water inlet hole pre-opened in a tank cover of the water tank by a pipeline.

Preferably, the lower end of the control section penetrates through the valve body, a blocking cover is arranged at the lower port of the control section, and the valve rod penetrates through the blocking cover.

The utility model also provides a water tank device, including the water tank, still include foretell ball-cock assembly.

Compared with the prior art, the utility model discloses a ball-cock assembly and water tank device's beneficial effect is:

1. the control flow channel is communicated with the water outlet of the valve component, so that water passing through the control flow channel flows out of the water outlet, and a port for controlling the on-off of the control flow channel is prevented from appearing outside the valve component, therefore, the valve component can be arranged at the top of the water tank, such as above the tank cover, and the water outlet is communicated with the water inlet hole of the water tank through a pipeline. The valve member is arranged outside the water tank, so that the valve member can be prevented from being cleaned and can be conveniently inclined.

2. Because the pilot flow passage is located inside the valve member, the probability of the pilot flow passage coming into contact with air is low, and therefore, the situation of plugging due to port fouling as in the prior art does not occur.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

The summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the embodiments of the invention. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

Fig. 1 is a schematic structural diagram of a float valve device according to an embodiment of the present invention (the first chamber and the second chamber are in a cut-off state).

Fig. 2 is a schematic structural diagram of a float valve device according to an embodiment of the present invention (the first chamber and the second chamber are in a communicating state).

Reference numerals:

10-a valve member; 11-a first chamber; 12-a second chamber; 13-a third chamber; 14-a cylinder body; 15-controlling the flow channel; 151-a guide section; 152-a control section; 16-a first valve core mechanism; 161-elastic film; 162-a valve plate; 163-an overflow aperture; 17-a second valve core mechanism; 171-a core body; 172-valve seat; 173-a valve stem; 174-a spring; 175-a blocking cap; 181-water inlet; 182-a water outlet; 191-a valve body; 192-a valve cover; 1921-a plug; 20-a float; 21-a vertical shift rod; 22-a liner; 30-a rod member; 40-a power-assisted spring; 50-a pipeline; 100-box cover; 101-water inlet hole.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and components may be omitted.

As shown in fig. 1 and 2, an embodiment of the present invention discloses a float valve device, which includes: a valve member 10, a float 20 and a rod member 30.

The valve member 10 has: a water inlet 181, a water outlet 182, a first chamber 11, a second chamber 12, a third chamber 13, a control flow passage 15, a first valve core mechanism 16, and a second valve core mechanism 17.

The first chamber 11, the second chamber 12, and the third chamber 13 are formed inside the valve member 10; an external water source, such as tap water supplied from a tap water pipe, is connected to the inlet 181 of the valve member 10, whereas the inlet 181 communicates with the first chamber 11 and the outlet 182 of the valve member 10 communicates with the second chamber 12, the outlet 182 being used for filling the tank with water.

The third chamber 13 is also in direct or indirect communication with an ambient water source to enable pressurized water provided by the ambient water source to enter the third chamber 13.

In the present invention, one end of the control flow passage 15 communicates with the third chamber 13, and the other end communicates with the inner end of the water outlet 182 (as will be understood, the inner end of the water outlet 182 is located inside the valve portion). Thus, as shown in fig. 2, the water in the third chamber 13 can flow to the water outlet 182 of the valve member 10 through the control flow passage 15 without the control flow passage 15 being cut off, and finally can be filled into the water tank, as shown in fig. 1, and if the control flow passage 15 is cut off, the water in the third chamber 13 cannot flow out through the control flow passage 15, and the third chamber 13 is communicated with the external water source, so that the pressure in the third chamber 13 is approximately equal to the external water source.

The first valve core mechanism 16 is used for controlling the on/off of the first chamber 11 and the second chamber 12, and the first valve core mechanism 16 is operated by the pressure of the water in the third chamber 13 to control the on/off of the first chamber 11 and the second chamber 12, specifically, as shown in fig. 1, after the control flow channel 15 is cut off, the pressure of the water established in the third chamber 13 drives the first valve core mechanism 16 to cut off the first chamber 11 and the second chamber 12; as shown in fig. 2, after the pilot flow path 15 is opened, the water in the third chamber 13 flows into the water outlet 182 of the valve member 10, the water pressure in the third chamber 13 is removed or greatly reduced, the pressure applied to the first valve core mechanism 16 is removed or greatly reduced, and at this time, the first valve core mechanism 16 reverses to communicate the first chamber 11 with the second chamber 12.

The second valve core mechanism 17 is used for controlling the on-off of the control flow passage 15, and the float 20 is operatively associated with the second valve core mechanism 17 through the rod member 30, specifically, as shown in fig. 2, when the float 20 moves downwards, the float 20 drives the second valve core mechanism 17 through the rod member 30 to open the control flow passage 15, as shown in fig. 1, and when the float 20 moves upwards, the second valve core mechanism 17 reversely acts to close the control flow passage 15.

Based on the above structure:

as shown in fig. 2, during the process of receiving water from the water tank by a user, the liquid level in the water tank drops, the float 20 synchronously moves downwards to drive the second valve core mechanism 17 to open the control flow passage 15, at this time, the water in the third chamber 13 enters the water outlet 182 of the valve component 10 through the control flow passage 15, the water pressure in the third chamber 13 is reduced or eliminated, the first valve core mechanism 16 enables the first chamber 11 to be communicated with the second chamber 12, and the water provided by the water source sequentially passes through the water inlet 181 of the valve component 10, the first chamber 11, the second chamber 12 and the water outlet 182 and then is injected into the water tank.

As shown in fig. 1, after the user stops receiving water from the water tank, the liquid level in the water tank rises, the float 20 moves upwards synchronously to release the driving of the second valve core mechanism 17, the second valve core mechanism 17 closes the control flow passage 15, at this time, part of the water in the water source enters the third chamber 13 to enable the water pressure to be reestablished, the first valve core mechanism 16 is forced to cut off the first chamber 11 from the second chamber 12 again, the water provided by the water source cannot enter the second chamber 12, and therefore, the water outlet 182 of the valve member 10 stops filling the water tank.

Compared with the mode of the break-make of the control flow channel 15 mentioned in the background art, the utility model discloses an aspect is with the control flow channel 15 inside the valve member 10 with the delivery port 182 intercommunication of valve member 10, and then makes the water through the control flow channel 15 flow out through the delivery port 182, and then avoids offering a port alone and making the water of control flow channel 15 flow out from this port in the outside of valve member 10, another aspect of the utility model is that float 20 borrows the break-make of the control flow channel 15 of second valve core mechanism 17 control rather than directly controlling the break-make of control flow channel 15 through the shutoff port.

The utility model discloses above-mentioned embodiment provides a ball-cock assembly's advantage lies in:

1. the control flow channel 15 is communicated with the water outlet 182 of the valve member 10, so that the water passing through the control flow channel 15 flows out from the water outlet 182, and a port for controlling the on-off of the control flow channel 15 is avoided outside the valve member 10, so that the valve member 10 can be arranged on the top of the water tank, such as above the tank cover 100, and the water outlet 182 is communicated with the water inlet 101 of the water tank through the pipeline 50. By arranging the valve member 10 outside the cistern, cleaning of the valve member 10 is avoided and tilting of the valve member 10 is facilitated.

2. Because the motive flow passage 15 is located inside the valve member 10, the motive flow passage 15 is less likely to come into contact with air, and therefore, as in the prior art, fouling of the ports does not occur, which could cause plugging.

In some preferred embodiments, the valve member 10 is internally formed with a cylinder 14, the first chamber 11 is an annular chamber formed outside the cylinder 14, the second chamber 12 is a cylindrical chamber formed inside the cylinder 14, and the upper end of the cylinder 14 is lower than the upper end of the first chamber 11. The first valve body mechanism 16 includes an elastic film 161 and a valve plate 162. The edge of the elastic membrane 161 is hermetically connected to the rim of the upper end of the first chamber 11 by a sealing material or a sealing structure; the valve plate 162 is provided on the elastic membrane 161 to be opposed to the cylinder 14, and the valve plate 162 has a radial dimension slightly larger than that of the cylinder 14 so that the valve plate 162 can close the upper port of the cylinder 14 by moving. The third chamber 13 is located above the elastic membrane 161.

In the embodiment, the annular region of the elastic membrane 161 corresponding to the first chamber 11 is provided with a through hole 163, and the through hole 163 enables the first chamber 11 to communicate with the third chamber 13, so that the third chamber 13 communicates with the water source through the through hole 163 and the first chamber 11, and further, the pressure water provided by the water source can be obtained. The flow cross section of the orifice 163 is made smaller than the flow cross section when the control flow path 15 is opened.

Based on the above structure:

as shown in fig. 2, when the liquid level of the water tank drops, so that the float 20 controls the second valve core mechanism 17 to open the control flow passage 15, the water in the third chamber 13 flows to the water outlet 182 through the control flow passage 15, although the water in the first chamber 11 partially enters the third chamber 13 through the through hole 163, the flow rate of the water flowing out from the third chamber 13 is much greater than that of the water entering the third chamber 13, so the water pressure in the third chamber 13 is very small, and because the first chamber 11 is communicated with the water source, the total pressure F2 of the water in the first chamber 11 to the elastic membrane 161 is much greater than the total pressure F1 of the water in the third chamber 13 to the elastic membrane 161, so that the elastic membrane 161 is forced to deform toward the third chamber 13, and the deformation of the elastic membrane 161 causes the valve plate 162 to move upward to open the upper end of the cylinder 14, so that the first chamber 11 is communicated with the second chamber 12, thereby causing water from the water supply to pass through the first chamber 11 into the second chamber 12 and ultimately out of the outlet 182 of the valve member 10.

As shown in fig. 1, when the liquid level of the water tank rises to cause the second valve core mechanism 17 to close the control flow passage 15, the water in the first chamber 11 continuously enters the third chamber 13 through the through hole 163, and finally the water pressure in the third chamber 13 is equal to the water pressure in the first chamber 11, but the water pressure in the second chamber 12 does not exist due to the communication with the water outlet 182, the total pressure F2 of the water in the third chamber 13 to the elastic membrane 161 and the valve plate 162 is greater than the total pressure F1 of the first chamber 11 to the elastic membrane 161, so that the valve plate 162 blocks the upper port of the cylinder 14 with a certain pre-tightening force, and the first chamber 11 is isolated from the second chamber 12.

The utility model provides an advantage of above-mentioned embodiment lies in:

1. the first chamber 11 and the second chamber 12 are correspondingly arranged into an annular chamber and a cylindrical chamber, and the elastic die and the valve plate 162 are matched to block the cylinder 14 and the pressure difference formed by the third chamber 13 and the first chamber 11, so that the port of the cylinder 14 is opened or closed, the on-off of the whole valve component 10 is controlled, and the design is ingenious.

2. By forming the overflowing hole 163 for communicating the first chamber 11 with the third chamber 13 on the elastic membrane 161, the first chamber 11 is used to obtain pressurized water from a water source, and by making the flowing cross section of the overflowing hole 163 smaller than that of the control flow channel 15 when being opened, the control flow channel 15 can obtain a pressure difference that the first chamber 11 is larger than the third chamber 13 when being opened, thereby avoiding additional channel formation to communicate the water source with the third chamber 13, and further making the internal structure of the valve member 10 simpler.

In some preferred embodiments, the valve member 10 is assembled by two solid components, namely, a valve body 191 and a valve cover 192, the cylinder 14 and the first chamber 11 and the second chamber 12 divided by the cylinder 14 are formed in the valve body 191, the valve cover 192 is buckled on the valve body 191, the valve cover 192 has an inner concave part, and the valve cover 192 and the valve body 191 form a third chamber 13.

The control flow passage 15 includes two sections, one is a guide section 151, the other is a control section 152, and the second valve core mechanism 17 is used for controlling the on/off of the control section 152. The guide section 151 is formed on the valve cover 192, the control section 152 is formed on the valve body 191 and located outside the first chamber 11, the control section 152 is provided as a linear chamber section, a plug 1921 is formed in a region of the valve cover 192 facing an upper end of the linear chamber section, and the guide section 151 penetrates to an end of the plug 1921. The plug 1921 is inserted into the upper port of the control section 152 and sealed by a sealing ring.

The lower end of the control section 152 passes through the valve body 191, and the lower port of the control section 152 is provided with a plugging cover 175. The second valve core mechanism 17 includes: valve seat 172, core 171, valve cover 192, and spring 174; the valve seat 172 is arranged at the upper part of the control section 152 by a sleeve check ring, and a through valve hole is formed in the valve seat 172; the core 171 is provided with a valve hole to open or close the valve hole by a linear movement; a spring 174 is interposed between core 171 and plug 1921 for urging the valve element downwardly to cause the valve element to block the valve opening.

One end of the valve stem 173 is connected to the core 171, the other end of the valve cap 192 protrudes out of the blocking cap 175 to protrude out of the valve body 191, and a sealing ring is disposed between the valve stem 173 and the blocking cap 175; the rod member 30 is a link rod pivotally connected to the bottom of the valve body 191, the float 20 is provided with a vertical movement rod 21, the vertical movement rod 21 is inserted into a bushing 22 installed in the case cover 100, the upper end of the vertical movement rod 21 is connected to the tail of the link rod, the head of the link rod is opposite to the valve rod 173, and an assist spring 40 is further disposed between the link rod and the valve body 191.

When the liquid level in the tank drops and the float 20 moves downward as shown in fig. 2, the float 20 drives the link rod to pivot by the vertical moving rod 21, so that the link rod pushes the valve rod 173 upward, and the core 171 opens the valve hole, and thus the control flow passage 15 is opened.

When the liquid level in the tank rises to move the float 20 upward, the float 20 drives the link lever to pivot reversely by the vertical moving rod 21, and at this time, the spring 174 of the second valve core mechanism 17 pushes the core 171 downward to close the valve hole, and thus the control flow passage 15 is closed, as shown in fig. 1.

The utility model provides an advantage of above-mentioned embodiment lies in:

the second valve core mechanism 17 is linked with the float 20 by the valve rod 173 extending out of the valve body 191, so that the on-off of the control flow channel 15 is controlled, and the design is ingenious.

The utility model also provides a water tank device, including the water tank, still include foretell ball-cock assembly, valve member 10 among this ball-cock assembly can set up in the top of water tank in order to obtain to avoid wasing or conveniently wash the effect of valve member 10.

Moreover, although exemplary embodiments have been described herein, the scope thereof includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., of various embodiments across), adaptations or variations. The elements of the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the present specification or during the prosecution of the application, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.

The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. Additionally, in the foregoing detailed description, various features may be grouped together to streamline the disclosure. This should not be interpreted as an intention that a disclosed feature not claimed is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.

Claims

1. A float valve apparatus comprising: a valve member, a float, and a rod member, wherein the valve member includes:

a water inlet;

a water outlet;

a first chamber in communication with the water inlet;

a second chamber in communication with the water outlet;

2. The float valve apparatus of claim 1, wherein said valve member has a cylinder formed therein, said first chamber being an annular chamber formed outside said cylinder and said second chamber being a cylindrical chamber formed inside said cylinder; the first valve core mechanism controls the connection and disconnection of the first chamber and the second chamber by opening or closing a port of the cylinder.

3. The float valve apparatus of claim 2, wherein said first spool mechanism comprises:

4. A float valve apparatus according to claim 3, wherein said third chamber is separated from said first and second chambers by said resilient membrane; wherein:

5. A float valve apparatus according to claim 3, wherein the port of the barrel is lower than the port of the first chamber.

6. The float valve apparatus of claim 3, wherein said control flow passage includes a guide section and a control section; and the second valve core mechanism is used for controlling the on-off of the control section.

7. The float valve apparatus of claim 6 wherein said control section is a linear chamber end; the second valve core mechanism includes:

a spring for urging the core in a direction to close the valve hole; wherein:

8. The float valve apparatus of claim 7 wherein said linear cavity section is located outside of said first chamber and axially coincident with said first chamber.

9. The float valve apparatus of claim 8, wherein said valve member further comprises a valve body and a valve cover; the first chamber and the second chamber are formed in the valve body, the valve cover is provided with an inner concave part, and the inner concave part and the valve body enclose the third chamber.

10. The float valve apparatus of claim 9, wherein said guide section is formed in said valve cover and said control section is formed in said valve body.

11. The float valve apparatus according to claim 10, wherein an end of the guide section is formed with a plug for insertion into a port of the control section and sealing arrangement by means of a sealing ring.

12. The float valve apparatus of claim 11 wherein said spring is interposed between said plug and said core.

13. The float valve apparatus according to claim 12, wherein said rod member includes a connecting rod pivotally connected to said valve body, said float being provided with a upstand having an upper end connected to a tail portion of said connecting rod, a head portion of said connecting rod being opposite to said valve stem;

the vertical moving rod penetrates through a tank cover of the water tank.

14. The float valve apparatus according to claim 1, wherein said water inlet is connected to a water inlet hole pre-opened to a cover of the water tank by means of a pipe.

15. The float valve device according to claim 13, wherein the lower end of the control section penetrates the valve body, a blocking cover is installed at the lower port of the control section, and the valve rod penetrates the blocking cover.

16. A cistern arrangement comprising a cistern, characterised in that it further comprises a float valve arrangement as claimed in any one of claims 1 to 15.