CN215888469U

CN215888469U - Water tank flushing device for closestool

Info

Publication number: CN215888469U
Application number: CN202122434446.3U
Authority: CN
Inventors: 郑江辉; 曹进锋; 冯杨斌; 张荣誉
Original assignee: Xiamen R&T Plumbing Technology Co Ltd
Current assignee: Xiamen R&T Plumbing Technology Co Ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-02-22
Anticipated expiration: 2031-10-09

Abstract

The utility model discloses a water tank flushing device for a closestool, which comprises a water tank, a drainage valve for controlling drainage of the water tank, a drainage pipe for communicating a drainage port of the drainage valve with a flushing waterway of the closestool, and a flushing valve. The flush valve comprises a valve body with a water inlet channel and a water outlet channel and a water stop assembly, wherein the water stop assembly can be movably arranged on the valve body between a water inlet position and a water stop position, the water inlet channel and the water outlet channel are controlled to be communicated when the water stop assembly is positioned at the water inlet position, and the water inlet channel and the water outlet channel are controlled to be disconnected when the water stop assembly is positioned at the water stop position. The water inlet channel is communicated with a pressure water source, and the water outlet channel is communicated with a urinal of the closestool. The flush valve also includes a buoyancy mechanism disposed in the tank and ascending or descending with the water level in the tank. The water tank flushing device also comprises a starting assembly for driving the water stopping assembly, the water stopping assembly is limited by the floating mechanism in the floating state when moving to the water inlet position and is kept at the water inlet position, and the floating mechanism removes the limitation on the water stopping assembly after falling along with the water level of the water tank.

Description

Water tank flushing device for closestool

Technical Field

The utility model relates to the technical field of toilets, in particular to a water tank flushing device for a toilet.

Background

In the existing flushing device for flushing the closestool, the hidden type water tank flushing device is more and more widely applied, and the specifications of the hidden type water tank are required to be diversified to adapt to various occasions due to the flexible arrangement of toilets of various house types. The top-pressing driven hidden water tank is popular with consumers due to low installation height and flexible layout. Concealed cistern is usually fitted with a water inlet valve, a water outlet valve, a drive means and cistern accessories. During drainage, after a button device arranged at the top of the hidden water tank is pressed to start the drain valve, water in the water tank rushes to the closestool under the action of gravitational potential energy. The flushing effect of the water tank flushing by the potential energy of water mainly depends on the potential energy of water, namely the potential energy is high, the flushing effect is good, the potential energy is low and the flushing effect is poor.

And because the hidden water tank of top press drive, because its mounting height is low, the water level height is low, so the potential energy of water in the water tank is low, and the flushing effect is relatively poor when the matching closestool, can't satisfy the requirement. And because the top is as required, the water tank height can't further heighten, is difficult to reach fine bath effect through the natural drainage of gravitational potential energy.

In order to solve the problems, some prior arts adopt a spring energy storage pressurizing structure arranged in a water tank, and utilize a compression spring in the water storage process of the water tank to store energy. However, the internal structure of the water tank is very complex and high in cost due to the adoption of the spring energy storage pressurizing structure.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to solve the above problems, and an object of the present invention is to provide a water tank flushing device for a toilet, which can effectively improve the flushing effect of a water tank flushing device having a lower water tank position, and has a simple structure and a low cost.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a water tank flushing device for a closestool comprises a water tank, a drain valve for controlling the drainage of the water tank, a drain pipe for communicating a drainage port of the drain valve with a flushing waterway of the closestool, and a flushing valve, wherein the flushing valve comprises a valve body with a water inlet channel and a water outlet channel, and a water stop component which can be movably arranged on the valve body between a water inlet position and a water stop position; the water tank flushing device further comprises a driving water stopping component, wherein the water stopping component moves to the starting component of the water inlet position from the water stopping position, the water stopping component moves to the water inlet position and is limited by the buoyancy mechanism in a floating state, the buoyancy mechanism keeps the water inlet position, and the buoyancy mechanism is along with the water level of the water tank falls and then is relieved to limit the water stopping component, so that the water stopping component can be reset to the water stopping position from the water inlet position.

Preferably, after the buoyancy mechanism releases the restriction on the water stopping assembly, the water stopping assembly is reset from the water inlet position to the water stopping position under the action of elastic force, gravity or magnetic force.

Preferably, the buoyancy mechanism comprises a floating barrel, and the floating barrel is arranged on the valve body in a height adjustable mode.

Preferably, the water stopping assembly comprises a water stopping pad arranged between the water inlet channel and the water outlet channel, a back pressure cavity formed by the valve body and the water stopping pad in a matched and enclosed mode, a pressure relief hole arranged on the cavity wall of the back pressure cavity, and a lifting rod for controlling the opening and closing of the pressure relief hole, wherein the lifting rod is rotatably arranged on the valve body, one end of the lifting rod is matched with the pressure relief hole, and the other end of the lifting rod is matched with the buoyancy mechanism; when the pressure relief hole is opened by the lifting rod, the water stop pad is communicated with the water inlet channel and the water outlet channel under the hydraulic pressure action of the water inlet channel, and the water stop assembly is located at the water inlet position; when the lifting rod is closed when the pressure relief hole is formed, the water stop pad cuts off the communication between the water inlet channel and the water outlet channel under the action of back pressure of the back pressure cavity, and the water stop component is located at the water stop position.

Preferably, the buoyancy mechanism comprises a floating barrel and a swing arm rotatably arranged on the valve body, the floating barrel is in transmission fit with one end of the swing arm to drive the swing arm to swing around a rotation axis of the swing arm, a butt block arranged at the other end of the swing arm is in limit fit or yielding fit with the other end of the lifting rod, the floating barrel is in a floating state, when the lifting rod rotates to a position for opening the pressure relief hole, the butt block on the swing arm is limited with the other end of the lifting rod to limit the water stop assembly, so that the lifting rod is kept at the position for opening the pressure relief hole; after the floating barrel falls down, the abutting block on the swing arm and the other end of the lifting rod are shifted to release the limitation on the water stop component, so that the lifting rod can be automatically reset.

Preferably, when the lifting rod rotates to the position for opening the pressure relief hole, the swing arm swings under the driving of the floating bucket until the abutting block abuts against the upper surface of the other end of the lifting rod, at the moment, the abutting block is in the abutting position, and the inner side of the abutting block is located on the outer side of a vertical plane passing through a rotation axis of the swing arm.

Preferably, the buoyancy mechanism further comprises a screw, the floating barrel is arranged on the screw in a height-adjustable mode, and the top end of the screw is connected with the swing arm.

Preferably, the starting assembly respectively drives and controls the drain valve and the water stopping assembly, or the starting assembly drives the drain valve to link with the water stopping assembly, or the starting assembly drives the water stopping assembly to link with the drain valve; the water stopping component and the drain valve have the same opening time period.

Preferably, the drain valve comprises a valve core for controlling the opening and closing of the drain outlet, and the valve core is driven by the starting assembly to move upwards to open the drain outlet and then is linked with the water stopping assembly.

Preferably, the starting assembly comprises a driving support, a swing rod is arranged on the driving support, and the swing rod is respectively linked with the drain valve and the water stopping assembly.

Preferably, the starting assembly drives the water stopping assembly through the transmission assembly, the transmission assembly comprises a transmission box and a steel wire rope, the transmission box is internally provided with the transmission assembly, the starting assembly drives the steel wire rope through the transmission assembly, and the steel wire rope drives the water stopping assembly.

Preferably, the water in the water outlet channel and the water in the water discharge pipe flow together into a urinal of a toilet after being converged in the water discharge pipe; or the water in the water outlet channel and the water in the water discharge pipe are converged in the flushing waterway of the toilet and then flow into the urinal of the toilet together; alternatively, the water of the water outlet channel and the water of the water discharge pipe flow into the urinal of the toilet bowl independently.

Preferably, the water outlet channel is connected with the water drainage pipe, and the water outlet channel is communicated or not communicated with the pipe cavity of the water drainage pipe.

The utility model has the beneficial effects that:

the flushing valve is arranged, the water inlet channel of the flushing valve is communicated with the pressure water source, and the water outlet channel of the flushing valve is communicated with the water discharge pipe, so that the water pressure of the pressure water source is utilized to assist in flushing the closestool, the flushing effect of the existing water tank flushing device with a lower water tank position can be effectively improved, the structure is simple, and the cost is low.

The utility model maintains the opening state of the flushing valve by the floating state of the floating mechanism in the water tank, and removes the restriction on the water stopping component when the floating mechanism falls along with the falling of the water level of the water tank, so that the water stopping component can normally close the flushing valve, and the flushing of the closestool can be realized by opening the flushing valve and opening the drain valve of the water tank together.

The floating barrel of the buoyancy mechanism is arranged on the valve body in a height-adjustable mode, so that the falling time of the floating barrel can be adjusted as required, and the opening time of the flushing valve is further controlled.

Utilize buoyancy mechanism to stagnant water subassembly spacing and stepping down for the flushometer can keep the on-state of a period, plays the effect of time delay, avoids exerting the drive power on lifting the pole and removes the back, lifts the pole and closes the pressure release hole at once, and is simple in structure to the control of flushometer, and the function is reliable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a perspective assembled view of a flush valve according to one embodiment of the present invention;

FIG. 2 is an exploded perspective view of a flush valve according to one embodiment of the present invention;

FIG. 3 is one of the cross-sectional views of a flush valve of an embodiment of the present invention with the water stop assembly in the water stop position;

FIG. 4 is a second cross-sectional view of the flush valve of one embodiment of the present invention with the water stop assembly in the water stop position;

FIG. 5 is a third cross-sectional view of the flush valve of one embodiment of the present invention with the water stop assembly in the water stop position;

FIG. 6 is one of the cross-sectional views of a flush valve of an embodiment of the present invention with the water stop assembly in the water inlet position;

FIG. 7 is a second cross-sectional view of the flush valve of one embodiment of the present invention with the water stop assembly in the water inlet position;

FIG. 8 is a third cross-sectional view of a flush valve in accordance with an embodiment of the present invention with the water stop assembly in the water inlet position;

FIG. 9 is an integrally assembled internal structural view of a cistern flushing device in accordance with one embodiment of the present invention;

FIG. 10 is a partial schematic view of the valve element of the drain valve not abutting the transmission case according to the embodiment of the present invention;

FIG. 11 is a partial schematic view of the valve element of the drain valve abutting the transmission case according to one embodiment of the present invention;

fig. 12 is a partial schematic view illustrating the way a transmission case performs a yielding process on a falling reset process of a valve element of a drain valve according to an embodiment of the present invention;

FIG. 13 is a cross-sectional view of the connection of the outlet passage of the flush valve to the drain in accordance with one embodiment of the present invention;

FIG. 14 is an integrally assembled perspective view of a cistern flushing device in accordance with another embodiment of the present invention;

FIG. 15 is a partial schematic view of a drive bay of another embodiment of the present invention not abutting a drive train cartridge;

FIG. 16 is a view showing the inner structure of the transmission case in the state of FIG. 15;

FIG. 17 is a partial schematic view of a drive bracket abutting a transmission drive box according to another embodiment of the utility model;

fig. 18 is a view showing an internal structure of the transmission case in the state of fig. 17.

The reference numerals are summarized as follows:

10-a water tank;

20-a drain valve; 21-a water outlet; 22-a valve core;

30-a drain pipe;

40-a flush valve; 41-a valve body; 411-water inlet channel; 412-a water outlet channel; 42-a water stop assembly; 421-a water stop pad; 422-back pressure chamber; 423-pressure relief hole; 424-lifting rod; 425-a spring; 43-a buoyancy mechanism; 431-a pontoon; 432-swing arm; 4321-abutment block; 433-a screw;

50-a starting assembly; 51-a drive carriage; 511-a swing lever;

60-a transmission assembly; 61-a transmission box; 611-connecting-rod assembly; 6111-swing block; 62-a steel wire rope;

70-anti-siphon structure; 71-an air inlet; 72-anti-siphon patches;

x-a vertical plane passing through the axis of rotation of the swing arm.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any 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 invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 13, a tank flushing device for a toilet according to an embodiment of the present invention includes a tank 10, a discharge valve 20 for controlling discharge of the tank 10, a discharge pipe 30 for communicating a discharge port 21 of the discharge valve 20 with a flushing path (not shown) of the toilet, and a flush valve 40.

The flush valve 40 includes a valve body 41 having a water inlet passage 411 and a water outlet passage 412, and a water stop assembly 42 movably disposed on the valve body 41 between a water inlet position and a water stop position. When the water stopping assembly 42 is located at the water inlet position, the water inlet channel 411 is controlled to be communicated with the water outlet channel 412, and when the water stopping assembly 42 is located at the water stopping position, the water inlet channel 411 is controlled to be disconnected with the water outlet channel 412. The water inlet channel 411 is communicated with a pressure water source (such as a municipal water supply pipe), and the water outlet channel 412 is communicated with a urinal (not shown) of the toilet, so that the toilet is flushed by utilizing the water pressure assistance of the pressure water source, the flushing effect of the existing water tank flushing device with a lower water tank position can be effectively improved, and compared with the existing scheme of utilizing a spring to store energy, the water tank flushing device is simple in structure and low in cost.

The flush valve 40 further includes a buoyancy mechanism 43 provided in the water tank 10, the buoyancy mechanism 43 ascending or descending with the water level of the water tank 10; the cistern flushing device also includes an actuating assembly 50 for actuating the water stop assembly 42 from the water stop position to the water inlet position. When the water stopping assembly 42 moves to the water inlet position, the water stopping assembly is limited by the floating mechanism 43 in the floating state and is kept at the water inlet position, and the floating mechanism 43 releases the limitation on the water stopping assembly 42 after falling along with the water level of the water tank 10, so that the water stopping assembly 42 can be reset to the water stopping position from the water inlet position.

In this embodiment, after the buoyancy mechanism 43 releases the restriction on the water stopping assembly 42, the water stopping assembly 42 is returned from the water inlet position to the water stopping position by the elastic force provided by the spring 425. Of course, the spring 425 may be replaced by a magnet (not shown), and the water stopping assembly 42 is reset from the water inlet position to the water stopping position by the magnetic force provided by the magnet; alternatively, the spring 425 may be replaced by a weight block (not shown), and the water stopping assembly 42 is reset from the water inlet position to the water stopping position by the gravity provided by the weight block; alternatively, the self-gravity of the water stopping assembly 42 can be utilized to reset the water stopping assembly 42 from the water inlet position to the water stopping position.

In this embodiment, the water stopping assembly 42 includes a water stopping pad 421 disposed between the water inlet channel 411 and the water outlet channel 412, a back pressure cavity 422 surrounded by the valve body 41 and the water stopping pad 421, a pressure releasing hole 423 disposed on a cavity wall of the back pressure cavity 422, and a lifting rod 424 for controlling the opening and closing of the pressure releasing hole 423. The lifting rod 424 is rotatably arranged on the valve body 41, one end of the lifting rod 424 is matched with the pressure relief hole 423, and the other end of the lifting rod 424 is matched with the buoyancy mechanism 43; when the lifting rod 424 opens the pressure relief hole 423, the water stop pad 421 is communicated with the water inlet passage 411 and the water outlet passage 412 under the hydraulic pressure of the water inlet passage 411, and the water stop assembly 42 is located at the water inlet position; when the lifting rod 424 closes the pressure relief hole 423, the water stop pad 421 cuts off the communication between the water inlet passage 411 and the water outlet passage 412 under the action of the back pressure cavity 422, and the water stop assembly 42 is located at the water stop position. The operation of the water stop assembly 42 is the same as that of a water inlet valve for controlling the water inlet of a toilet tank in the prior art, and is well known in the art and will not be described in detail herein.

In this embodiment, the buoyancy mechanism 43 includes a float barrel 431, a swing arm 432 rotatably provided to the valve body 41, and a screw 433. As shown in fig. 6, the swing arm 432 has one end connected to the screw 433 and the other end provided with an abutment 4321 that mates with the lifting rod 424. The floating barrel 431 drives the swing arm 432 to swing around the rotation axis of the swing arm 432 through the screw 433, so that the abutting block 4321 at the other end of the swing arm 432 is in limit fit or yielding fit with the other end of the lifting rod 424. Referring to fig. 6, when the floating bucket 431 is in a floating state, and the lifting rod 424 rotates to a position for opening the pressure relief hole 423, the abutting block 4321 on the swing arm 432 is limited by the other end of the lifting rod 424 to limit the water stop assembly 42, so that the lifting rod 424 is kept at the position for opening the pressure relief hole 423; referring to fig. 3, after the float 431 falls down, the abutment block 4321 on the swing arm 432 is displaced from the other end of the lifting rod 424 to release the restriction of the water stopping assembly 42, so that the lifting rod 424 can be automatically reset. The floating mechanism 43 is used for limiting and yielding the lifting rod 424, so that the flushing valve 40 can be kept in an opening state for a period of time, a time delay effect is achieved, the lifting rod 424 is prevented from closing the pressure relief hole 423 immediately after the driving force applied to the lifting rod 424 is removed, and the control structure of the flushing valve is simple and reliable in function.

In this embodiment, referring to fig. 6, when the lifting rod 424 rotates to a position to open the pressure relief hole 423, the swing arm 432 is driven by the float 431 to swing to a position where the abutment block 4321 abuts on the upper surface of the other end of the lifting rod 424, at this time, the abutment block 4321 is in the abutment position, and the inner side of the abutment block 4321 is located outside a vertical plane X passing through the rotation axis of the swing arm 432. Because the inner side of the abutting block 4321 is positioned on the outer side of the vertical plane X passing through the rotation axis of the swing arm 432, after the floating barrel 431 falls down, the abutting block 4321 on the swing arm 432 can smoothly leave the other end of the lifting rod 424 to stop abutting against the limiting lifting rod 424, and the function is more reliable.

In this embodiment, preferably, the float 431 is height-adjustable disposed on the valve body 41, so that the falling time of the float 431 can be adjusted as required, and further the opening duration of the flush valve can be controlled. Specifically, the float barrel 431 is height-adjustably mounted on a screw 433, and a top end of the screw 433 is connected to the swing arm 432.

The water stop assembly 42 has the same opening time period as the drain valve 20, so that the water provided by the flush valve 40 and the water discharged by the drain valve 20 can flush the urinal of the toilet together, and the flushing effect is better.

The actuating assembly 50 may be a button assembly, a wrench assembly, a panel assembly, etc., and as shown in fig. 9, a panel assembly is specifically used, which includes a panel (not shown) having an actuating button (not shown). The starting assembly 50 can be used for respectively driving and controlling the drain valve 20 and the water stopping assembly 42; alternatively, the starting assembly 50 may be a linkage water stopping assembly 42 by driving the drain valve 20; alternatively, the actuating assembly 50 may be actuated by actuating the water stop assembly 42 in conjunction with the drain valve 20. The embodiment specifically adopts the starting assembly 50 linked with the water stopping assembly 42 through the drainage valve 20.

In a specific implementation, the drain valve 20 includes a valve core 22 for controlling the opening and closing of the drain port 21, and the valve core 22 is linked with the water stop assembly 42 when being driven by the starting assembly 50 to move upwards to open the drain port 21.

In this embodiment, the cistern flushing device further comprises a transmission assembly 60, the starting assembly 50 drives the valve core 22, and the valve core 22 further drives the water stopping assembly 42 through the transmission assembly 60. The transmission assembly 60 includes a transmission box 61 and a steel wire rope 62, a transmission assembly is arranged in the transmission box 61, the transmission assembly is specifically a connecting rod assembly 611, the valve core 22 drives the steel wire rope 62 through the connecting rod assembly 611, and the steel wire rope 62 further drives the water stopping assembly 42.

The case 22 of this embodiment does not link stagnant water subassembly 42 when moving down in order to close outlet 21, specifically, be equipped with wobbling pendulum block 6111 on the input of link assembly 611, when case 22 moves up and butts pendulum block 6111, pendulum block 6111 is spacing by link assembly 611 after the certain angle of swing and then can drive link assembly 611, and when case 22 moves down and butts pendulum block 6111, pendulum block 6111 is spacing by link assembly 611 and can swing and give way, thereby can not cause the blockking to the downstream of case 22, and then do not influence the displacement of drain valve 20, the washing function is more stable.

In this embodiment, the water in the water outlet passage 412 and the water in the water discharge pipe 30 are merged in the flushing waterway of the toilet and then flow together into the bowl of the toilet. Of course, in other embodiments, the water in the water outlet channel 412 and the water in the water outlet pipe 30 may flow together into the urinal of the toilet after being merged in the water outlet pipe 30; it is also possible that the water of the outlet passage 412 flows into the bowl of the toilet relatively independently of the water of the drain pipe 30.

In order to make the overall layout more simple, it is preferable that the outlet passage 412 is connected to the outlet pipe 30, when the water of the outlet passage 412 and the water of the outlet pipe 30 flow relatively independently to each other into the flushing waterway of the toilet or the urinal of the toilet, the outlet passage 412 is not communicated with the lumen of the outlet pipe 30, and when the water of the outlet passage 412 and the water of the outlet pipe 30 flow together into the urinal of the toilet after being merged in the outlet pipe 30, the outlet passage 412 is communicated with the lumen of the outlet pipe 30.

As shown in fig. 4, 5, 7 and 8, in the present embodiment, an anti-siphon structure 70 is further provided on the water outlet channel 412, and the anti-siphon structure includes an air inlet 71 provided on the water outlet channel 412 and an anti-siphon sheet 72 opening and closing and cooperating with the air inlet 71.

The working principle of the embodiment is as follows:

referring to fig. 3 to 5, in an initial state, the water tank 10 is full of water, the float barrel 431 of the buoyancy mechanism 43 is in a floating state, the water stopping assembly 42 is in a water stopping position, one end of the lifting rod 424 closes the pressure relief hole 423, and the water stopping pad 421 cuts off the communication between the water inlet passage 411 and the water outlet passage 412 under the action of the back pressure chamber 422. The drain valve 20 in the water tank 10 is also in a closed state.

Referring to fig. 6 to 9, when the toilet bowl of the toilet needs to be flushed, a button on the panel is pressed, the button drives the valve core 22 of the drain valve 20 to move upward, so as to open the drain port 21 for draining water, so as to provide the flush water in the water tank 10 to the toilet bowl of the toilet, meanwhile, the valve core 22 moves upward and abuts against the swing block 6111, the swing block 6111 is limited, so as to drive the connecting rod assembly 611, the connecting rod assembly 611 drives the lifting rod 424 of the water stopping assembly 42 through the steel wire rope 62, so that the lifting rod 424 opens the pressure relief hole 423, so that the water inlet channel 411 of the flush valve 40 is communicated with the water outlet channel 412, and the flush valve 40 provides the water from a pressure water source (such as a municipal water supply pipeline or a water pump) to the toilet bowl of the toilet through the water outlet channel 412. Thus, the pressure water controlled by the flushing valve 40 and the water tank water controlled by the drain valve 20 can flush the urinal of the toilet at the same time, and the flushing effect is greatly improved. As shown in fig. 6, after the pressure relief hole 423 is opened by the lifting rod 424, an end of the lifting rod 424, which is far away from the pressure relief hole 423, is abutted by the abutment block 4321 on the swing arm 432 of the buoyancy mechanism 43, so that the lifting rod 424 is limited, the lifting rod 424 is kept at a position for opening the pressure relief hole 423, and thus the flush valve 40 can be continuously opened to continuously supply the pressurized water. When the water level in the water tank 10 drops to cause the buoyancy of the floating barrel 431 to be insufficient and fall, the floating barrel 431 drives the swing arm 432 to swing, so that the abutting block 4321 on the swing arm 432 swings open and does not abut against the limiting lifting rod 424, the lifting rod 424 resets under the elastic force of the spring 425 and closes the pressure relief hole 423, the water stop pad 421 cuts off the communication between the water inlet channel 411 and the water outlet channel 412 under the action of the back pressure cavity 422, and the flushing valve 40 stops supplying water. When the water level of the tank drops to a predetermined level, the valve body 22 of the drain valve 20 also drops to close the drain port 21, and the water supply to the toilet is stopped. In the falling process of the valve core 22, the swing block 6111 swings to give way, so that the normal falling of the valve core 22 is not affected.

After the water tank 10 finishes draining, the water inlet valve feeds water into the water tank 10, so that the floating barrel 431 of the buoyancy mechanism 43 is floated again, and the flush valve 40 is restored to the initial state shown in fig. 3 to 5.

Referring to fig. 14 to 18, a cistern flushing device for a toilet according to another embodiment of the present invention is different from the above-mentioned embodiments in that the above-mentioned embodiment uses an actuating assembly 50 to drive the water stopping assembly 42 through the water discharge valve 20, and the embodiment is replaced with an actuating assembly 50 to drive and control the water discharge valve 20 and the water stopping assembly 42 respectively. Specifically, in the present embodiment, the starting assembly 50 includes a driving bracket 51, a swing rod 511 is disposed on the driving bracket 51, and the swing rod 511 is linked with the drain valve 20 and the water stopping assembly 42 respectively. Similarly, the swing lever 511 drives the water stopping assembly 42 through the transmission assembly 60. The transmission assembly 60 also comprises a transmission box 61 and a steel wire rope 62, and the swing rod 511 drives the water stopping assembly 42 through the transmission box 61 and the steel wire rope 62.

The working principle and working process of this embodiment are substantially the same as those of the above embodiment, except that the starting assembly 50 of this embodiment drives the valve core and the transmission assembly 60 of the drain valve 20, respectively, and the working principle and working process of the flush valve 40 and the drain valve 20 are substantially the same as those of the above embodiment, and are not described again here.

The utility model maintains the opening state of the flushing valve by the floating state of the floating mechanism in the water tank and removes the restriction on the water stopping component when the floating mechanism falls along with the falling of the water level of the water tank by arranging the floating mechanism, so that the water stopping component can normally close the flushing valve, the flushing valve can be flushed by opening the flushing valve and opening the drain valve of the water tank together, the design concept is ingenious, and the control is reliable.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A water tank flushing device for a closestool comprises a water tank, a drain valve for controlling the drainage of the water tank, and a drain pipe for communicating a drainage port of the drain valve with a flushing waterway of the closestool, and is characterized in that the water tank flushing device also comprises a flushing valve, wherein the flushing valve comprises a valve body with a water inlet channel and a water outlet channel, and a water stop component which can be movably arranged on the valve body between a water inlet position and a water stop position, the water stop component controls the water inlet channel and the water outlet channel to be communicated when positioned at the water inlet position, the water stop component controls the water inlet channel and the water outlet channel to be disconnected when positioned at the water stop position, the water inlet channel is communicated with a pressure water source, and the water outlet channel is communicated to a urinal of the closestool; the flushing valve also comprises a floating mechanism arranged in the water tank, and the floating mechanism rises or falls along with the water level of the water tank; the water tank flushing device further comprises a driving water stopping component, wherein the water stopping component moves to the starting component of the water inlet position from the water stopping position, the water stopping component moves to the water inlet position and is limited by the buoyancy mechanism in a floating state, the buoyancy mechanism keeps the water inlet position, and the buoyancy mechanism is along with the water level of the water tank falls and then is relieved to limit the water stopping component, so that the water stopping component can be reset to the water stopping position from the water inlet position.

2. The tank flushing device of claim 1, wherein after the buoyancy mechanism releases the restriction on the water stopping assembly, the water stopping assembly is returned from the water inlet position to the water stopping position by elastic force, gravity or magnetic force.

3. The tank flushing device of claim 1, wherein the buoyancy mechanism comprises a float, the float being height adjustable on the valve body.

4. The cistern flushing device according to claim 1, wherein the water stop assembly comprises a water stop gasket disposed between the water inlet passage and the water outlet passage, a back pressure chamber defined by the valve body and the water stop gasket, a pressure relief hole disposed on the wall of the back pressure chamber, and a lifting rod for controlling the opening and closing of the pressure relief hole, the lifting rod is rotatably disposed on the valve body, one end of the lifting rod is engaged with the pressure relief hole, and the other end thereof is engaged with the buoyancy mechanism; when the pressure relief hole is opened by the lifting rod, the water stop pad is communicated with the water inlet channel and the water outlet channel under the hydraulic pressure action of the water inlet channel, and the water stop assembly is located at the water inlet position; when the lifting rod is closed when the pressure relief hole is formed, the water stop pad cuts off the communication between the water inlet channel and the water outlet channel under the action of back pressure of the back pressure cavity, and the water stop component is located at the water stop position.

5. The water tank flushing device according to claim 4, wherein the buoyancy mechanism comprises a floating barrel and a swing arm rotatably disposed on the valve body, the floating barrel is in transmission fit with one end of the swing arm to drive the swing arm to swing around a rotation axis of the swing arm, a butting block disposed at the other end of the swing arm is in limit fit or allowance fit with the other end of the lifting rod, when the lifting rod rotates to a position for opening the pressure relief hole, the butting block on the swing arm is in limit fit with the other end of the lifting rod to limit the water stop assembly, so that the lifting rod is kept at the position for opening the pressure relief hole; after the floating barrel falls down, the abutting block on the swing arm and the other end of the lifting rod are shifted to release the limitation on the water stop component, so that the lifting rod can be automatically reset.

6. The cistern flushing device of claim 5, wherein when the lever is rotated to a position to open the pressure relief hole, the swing arm is swung by the float to a position where the abutment block abuts against the upper surface of the other end of the lever, at which time the abutment block is in an abutment position, and the inner side of the abutment block is located outside a vertical plane passing through the rotation axis of the swing arm.

7. The cistern flushing device of claim 5, wherein the buoyancy mechanism further comprises a screw, the float being height adjustable on the screw, the top end of the screw being connected to the swing arm.

8. The water tank flushing device according to claim 1, wherein the starting assembly respectively drives and controls the drain valve and the water stop assembly, or the starting assembly is linked with the water stop assembly by driving the drain valve, or the starting assembly is linked with the drain valve by driving the water stop assembly; the water stopping component and the drain valve have the same opening time period.

9. The cistern flushing device of claim 8, wherein the drain valve includes a valve core for controlling the opening and closing of the drain outlet, and the valve core is linked with the water stop component when the valve core moves upwards under the driving of the starting component to open the drain outlet.

10. A cistern flushing device as claimed in claim 8, wherein the actuation assembly includes a drive bracket on which is mounted a swing lever, the swing lever being in linkage with the drain valve and the sealing assembly respectively.

11. The water tank flushing device according to claim 8, wherein the starting assembly drives the water stopping assembly through a transmission assembly, the transmission assembly comprises a transmission box and a steel wire rope, the transmission box is internally provided with the transmission assembly, the starting assembly drives the steel wire rope through the transmission assembly, and the steel wire rope further drives the water stopping assembly.

12. The tank flushing device of claim 1, wherein the water of the outlet passage and the water of the drain pipe flow together into a bowl of a toilet after merging in the drain pipe; or the water in the water outlet channel and the water in the water discharge pipe are converged in the flushing waterway of the toilet and then flow into the urinal of the toilet together; alternatively, the water of the water outlet channel and the water of the water discharge pipe flow into the urinal of the toilet bowl independently.

13. The tank flushing device according to claim 12, wherein the outlet passage is connected to the drain pipe, and the outlet passage is communicated or not communicated with a lumen of the drain pipe.