CN115680077A

CN115680077A - Drainage device and bathroom equipment

Info

Publication number: CN115680077A
Application number: CN202110825213.8A
Authority: CN
Inventors: 李文明; 曾健
Original assignee: Shenzhen Hengzhiyun Technology Co Ltd
Current assignee: Shenzhen Hengzhiyun Technology Co Ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2023-02-03

Abstract

The invention relates to a drainage device and bathroom equipment. The flushing mechanism is provided with a driving cavity with variable space size and a driven cavity with variable space size; when the space of drive chamber expands, the drive chamber makes the driven chamber receive the compression and the space diminishes through the transmission, and the space variation of driven chamber is greater than the space variation of drive chamber. The first control valve has a through-flow state for opening the liquid injection flow passage of the drive chamber and a shut-off state for shutting off the liquid injection flow passage of the drive chamber. The overflow valve is connected between the driving cavity and the driven cavity and used for isolating the driven cavity from the driving cavity in a through-flow state and communicating the driven cavity with the driving cavity in a cut-off state. The second control valve is used for controlling the on-off of the liquid supplementing flow channel of the driven cavity according to the liquid level height in the driven cavity. After the driven cavity completes the supplement of the fluid, the drainage device can perform the next drainage operation, and the circulation operation of the drainage device is realized.

Description

Drainage device and bathroom equipment

Technical Field

The invention relates to the technical field of sanitary equipment, in particular to a drainage device and sanitary equipment.

Background

The intelligent closestool is used as bathroom equipment, and the development trend is that the thinner the cover plate is, the more the cover plate is flat, so that the attractiveness is improved, and the indoor space is saved. The ceramic water tank of traditional closestool need satisfy high requirement, just has sufficient potential energy and water volume to let the closestool wash clean, but ceramic water tank's height can lead to the whole great indoor space that occupies of intelligent closestool, makes this kind of mode to be eliminated gradually.

The ceramic-free water tank toilet structure on the market is usually flushed by directly utilizing the water pressure of tap water, and the requirement on the water pressure is high. However, the old community has unstable water pressure, and when the water pressure is insufficient, the water source output flow rate is slow, so that the washing and the rinsing cannot be guaranteed.

In addition, the water quantity of the closestool without the ceramic water tank is ensured by arranging a booster pump, but the mode causes the closestool to have a complex structure, and is expensive and easy to damage.

Disclosure of Invention

Accordingly, there is a need for a water drainage device and a sanitary ware, which can solve the problem that the water pressure of the sanitary ware is limited by the water source and the flow rate cannot be guaranteed, and the structure is complicated due to the addition of a booster pump.

A drain, comprising:

the flushing mechanism is provided with a driving cavity with variable space size and a driven cavity with variable space size; when the space of the driving cavity is expanded, the driving cavity enables the space of the driven cavity to be contracted through transmission, and the space variation of the driven cavity is larger than that of the driving cavity;

the first control valve is provided with a through-flow state for enabling the liquid injection flow channel of the driving cavity to be opened and a cut-off state for enabling the liquid injection flow channel of the driving cavity to be cut off;

the overflow valve is connected between the driving cavity and the driven cavity; the driven cavity is isolated from the driving cavity when in a flow-through state, and is communicated with the driving cavity when in a flow-off state; and

and the second control valve is used for controlling the on-off of the liquid supplementing flow channel of the driven cavity according to the liquid level height in the driven cavity.

Above-mentioned drainage device, because when the drive chamber expands, the space variation of driven chamber is greater than the space variation of drive chamber, therefore by the fluid volume of discharging in the driven chamber be greater than the fluid volume that gets into the drive chamber to can promote the discharged water volume in the short time, improve and wash or blowdown effect. And the regulation and control assembly controls the turn-off of a flow channel between the driving cavity and the fluid supply source after the drainage of the driven cavity is finished, controls the fluid to supplement the driven cavity, counteracts the driving cavity when the driven cavity expands, and guides and supplements the fluid discharged from the driving cavity to the driven cavity through the regulation and control assembly. After the driven cavity completes the supplement of the fluid, the drainage device can perform the next drainage operation, and the circulation operation of the drainage device is realized. In addition, the water discharge device makes full use of the water quantity amplification form, and enables fluid with larger volume to clean the body of the sanitary ware in unit time, and under the same volume, the larger flow speed has better flushing effect on the body. Therefore, the problem that the body of the bathroom equipment is not cleanly washed under low water pressure is solved, or the washing effect is met by using less water, and the current energy-saving and environment-friendly concept is met. Meanwhile, as the additional booster pump is not needed, the complex structure, the cost increase or the stability reduction of the drainage device are avoided. In addition, the fluid supplement of the driving cavity can be controlled through the control of the first control valve, and the overflow valve adjusts the communication or isolation between the driven cavity and the driving cavity according to the state of the first control valve, so that the control of the drainage device can be simplified.

In one embodiment, the overflow valve is provided with a liquid inlet, a liquid outlet and a discharge port, and the first control valve is connected between the liquid inlet and a fluid supply source; the liquid outlet is communicated to the driving cavity, and the drainage port is communicated to the driven cavity; under the through-flow state, the liquid outlet is isolated from the drainage port; in the flow-interrupting state, the liquid outlet is communicated with the drainage port.

In one embodiment, the overflow valve comprises a main valve body and a valve core assembly movably arranged in the main valve body; the main valve body is provided with a main runner which is communicated with the liquid inlet and the liquid outlet; in the through-flow state, the valve core assembly is used for isolating the drain port from the main flow channel; in the shut-off state, the valve core assembly releases the isolation between the drain port and the main flow passage.

In one embodiment, the valve core assembly has a first state for isolating the drain port from the main flow passage and a second state for communicating the drain port with the main flow passage; the overflow valve also comprises a time delay assembly, and the time delay assembly is provided with an adjusting cavity with variable size; the adjusting cavity is communicated with the main flow passage; when the adjusting cavity is expanded to a preset degree after fluid is injected, the time delay assembly acts on the valve core assembly to enable the valve core assembly to be changed from the first state to the second state; alternatively, the delay assembly may act on the first control valve to switch the first control valve from the flow-passing state to the flow-blocking state when the regulator chamber is expanded to a predetermined extent by fluid injection.

In one embodiment, the flushing mechanism is provided with a compression driving member for abutting against the inner wall of the driven cavity; when the driven chamber contracts to abut the inner wall of the driven chamber with the compression transmission member, the compression transmission member acts on the main side switching trigger member of the first control valve to switch the first control valve from the through-flow state to the shut-off state.

In one embodiment, a main side output cavity and a main side internal guide port communicated with the main side output cavity are arranged in the first control valve; the first control valve is also provided with a main side spacer for abutting against the main side internal guide opening; the first control valve is provided with a main side input cavity at one side of the main side diaphragm, which is opposite to the main side internal guide opening, and the main side input cavity is used for being communicated with a fluid supply source; the first control valve is also provided with a main side balance pipe of which one end is communicated with the main side output cavity; the main side switching trigger piece is used for controlling the connection and disconnection between the other end of the main side balance pipe and the main side input cavity.

In one embodiment, the flushing mechanism comprises a secondary side shell and a piston assembly, wherein the piston assembly is movably arranged through the secondary side shell to form the driven cavity in a matching manner; the compression transmission member is mounted on the secondary side shell, and the piston assembly is abutted to the compression transmission member when penetrating into the secondary side shell.

In one embodiment, the flushing mechanism further comprises a liquid level detection piece which is arranged in the driven cavity in a penetrating mode, and the liquid level detection piece is lifted and lowered in a floating mode under the action of the liquid level in the driven cavity; and the liquid level detection piece acts on the secondary side switching trigger piece of the second control valve when rising to a preset height, so that the second control valve is switched from an on state to an off state.

In one embodiment, the first control valve and the overflow valve are arranged separately.

A sanitary fixture, comprising: the drainage device comprises a drainage device and a body connected with the drainage device; the body is provided with a liquid pool, the bottom of the liquid pool is provided with a sewage draining exit, and the fluid discharged from the driven cavity is output to the liquid pool and/or the sewage draining exit of the body so as to wash the inner wall of the liquid pool and/or discharge the sewage from the sewage draining exit.

Drawings

Fig. 1 is a schematic structural view of a sanitary device according to an embodiment of the present invention;

FIG. 2 is a schematic view of the drain of FIG. 1, wherein the first control valve is in a flow-passing state;

FIG. 3 is an enlarged view of the drain shown in FIG. 2 at A;

FIG. 4 is an enlarged view of the drain shown in FIG. 2 at B;

FIG. 5 is an enlarged view of the drain shown in FIG. 2 at C;

FIG. 6 is a schematic view of the drain of FIG. 2 in another condition wherein the first control valve is in a flow-blocking condition;

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

FIG. 8 is a fragmentary schematic view of the relief valve shown in FIG. 7;

FIG. 9 is an enlarged view of the relief valve shown in FIG. 8 at D;

fig. 10 is an enlarged view of the relief valve shown in fig. 8 at E.

Reference numerals are as follows:

100. sanitary equipment; 30. a body; 31. a liquid pool; 311. a sewage draining port; 32. washing and brushing the waterway; 321. a liquid outlet hole; 33. a spray waterway; 34. a siphon tube; 35. an accommodating cavity; 70. a drainage device; 40. a flushing mechanism; 401. a drive chamber; 402. a driven chamber; 41. a primary side housing; 411. a main side port; 412. a primary side flexible bellows; 42. a secondary side housing; 421. a secondary side port; 422. a secondary side flexible bellows; 43. a piston assembly; 431. a driving plate; 432. a transition bar; 433. a driven plate; 434. a pressure relief runner; 435. a pressure relief valve core; 436. a pressure relief push block; 44. compressing the transmission member; 45. a liquid level detection member; 46. resetting the driving member; 50. a first control valve; 51. a primary side switch trigger; 52. a primary side output cavity; 53. a main side inner guide port; 54. a main side spacer; 55. a primary side input cavity; 56. main side guide holes; 57. a primary side balance tube; 20. an overflow valve; 21. a main valve body; 211. an outer joint; 211a, a liquid inlet; 211b, a through-flow bayonet; 212. a main valve housing; 212a, a liquid outlet; 212b, a main runner; 212c, a drainage bayonet; 212d, a drainage cavity; 212e, a drain port; 212f, a convex tube; 212g, a control port; 22. a valve core assembly; 221. a valve core body; 221a, a through-flow guide frame; 221b, a drainage guide frame; 222. a first leakage preventing pad; 223. a second leakage preventing pad; 23. a delay component; 231. a housing; 231a, a first split shell; 231b, a second split shell; 231c, a throttle seat; 231d, transition holes; 232. a piston member; 232a, a first piston block; 232b, a second piston block; 233. a transfer member; 234. an adjustment chamber; 235. a delay flow channel; 236. sealing the flexible member; 237. a pipe body; 238. a first elastic member; 239. a second elastic member; 24. a throttle assembly; 241. a throttle core; 243. an orifice; 244. a throttling leakage-proof pad; 242. a throttle cap; 80. a second control valve; 81. a secondary side switching trigger; 82. a secondary side output cavity; 83. a secondary side inner guide port; 84. a secondary side spacer; 85. a secondary side input cavity; 86. a secondary side balance tube; 900. a fluid supply source.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical scheme provided by the embodiment of the invention is described in the following with reference to the accompanying drawings.

The invention provides a sanitary ware 100.

Referring to fig. 1, a sanitary ware 100 includes a drainage device 70 and a main body 30 connected to the drainage device 70, the main body 30 has a liquid pool 31, and a drain outlet 311 is disposed at the bottom of the liquid pool 31. In one embodiment, sanitary fixture 100 is a toilet, it being understood that sanitary fixture 100 may also be a sink, a bathtub, or other like device that requires flushing. Body 30 may have a wash waterway 32 to direct fluid in drain 70 to the upper side of tank 31, so that fluid can uniformly wash the inner wall of tank 31 from top to bottom. The body 30 may further include a spray waterway 33 and a siphon pipe 34 connected to the sewage draining outlet 311, wherein the spray waterway 33 guides the fluid in the drainage device 70 to the liquid pool 31 and discharges the dirt in the liquid pool 31 through the sewage draining outlet 311 and the siphon pipe 34.

More specifically, the washing water path 32 discharges the fluid to the inner wall of the upper side of the liquid pool 31 through the liquid outlet hole 321. The body 30 is provided with an accommodating cavity 35, and the accommodating cavity 35 is used for accommodating the flushing mechanism 40.

The present invention provides a drainage device 70.

As shown in fig. 2-6, the drain device 70 includes a flush mechanism 40, a first control valve 50 connected to the flush mechanism 40, a spill valve 20 connected to the flush mechanism 40, and a second control valve 80 connected to the flush mechanism 40.

The flush mechanism 40 has a drive chamber 401 of variable spatial size and a follower chamber 402 of variable spatial size. When the space of the driving chamber 401 expands, the driving chamber 401 causes the driven chamber 402 to spatially contract through transmission, and the spatial variation of the driven chamber 402 is larger than that of the driving chamber 401. The first control valve 50 has a flow-through state in which the filling flow path of the drive chamber 401 is open and a flow-blocking state in which the filling flow path of the drive chamber 401 is closed. A spill valve 20 is connected between drive chamber 401 and driven chamber 402 for isolating driven chamber 402 from drive chamber 401 in a flow passing state and for communicating driven chamber 402 with drive chamber 401 in a flow blocking state. The second control valve 80 is used for controlling the on-off of the liquid supplementing flow passage of the driven cavity 402 according to the liquid level in the driven cavity 402.

Referring to fig. 2 and 6, in particular, when the driving chamber 401 is expanded by the driving external force, the driving external force is transmitted to compress and reduce the driven chamber 402, so as to discharge the fluid stored in the driven chamber 402. When the driving chamber 401 is expanded by the driving external force, the expansion space variation amount is smaller than the compression space variation amount of the driven chamber 402. The first control valve 50 and the relief valve 20 are used to control the opening and closing of the filling flow path between the drive chamber 401 and the fluid supply source 900. The second control valve 80 is used to regulate fluid replenishment of the driven chamber 402. After completion or interruption of compression of slave cavity 402, spill valve 20 is used to direct makeup of drive cavity 401 to slave cavity 402. Specifically, the charge flow path is provided between the fluid supply source 900, the first control valve 50, the relief valve 20, and the drive chamber 401.

During operation of the drain 70, the driven chamber 402 may be pre-filled with fluid to fully expand the interior space of the driven chamber 402, while the driving chamber 401 is pre-drained to allow the driving chamber 401 to be in a contracted state. When the fluid supply source 900 generating the driving external force injects the fluid into the driving chamber 401 in the contracted state under the control of the first control valve 50, the driving chamber 401 is spatially expanded by the filling of the fluid. The driving chamber 401 transmits a driving external force to the driven chamber 402 when expanding, so that the driven chamber 402 is compressed, and the fluid stored in the driven chamber 402 is discharged to the body 30 of the sanitary ware 100. Because the space variation of the driven cavity 402 is larger than that of the driving cavity 401 when the driving cavity 401 expands, the amount of fluid discharged from the driven cavity 402 is larger than that entering the driving cavity 401, so that the amount of discharged water can be increased in a short time, and the flushing or sewage discharging effect is improved. After the drain of the slave chamber 402 is completed, the first control valve 50 is switched from the flow passage state to the shut-off state to close the flow passage between the drive chamber 401 and the fluid supply source 900, and the relief valve 20 allows the drive chamber 401 and the slave chamber 402 to communicate with each other. The second control valve 80 supplements the driven cavity 402 by fluid, when the driven cavity 402 expands, the driven cavity 402 reacts with the driving cavity 401, and the fluid discharged from the driving cavity 401 is guided by the overflow valve 20 to supplement the driven cavity 402, so that the driven cavity 402 is supplemented with the fluid rapidly. After the fluid is replenished from the driven chamber 402, the drain device 70 may perform the next drain operation, in which the first control valve 50 is switched from the shut-off state to the flow state by the drain operation, and the fluid supply source 900 injects the fluid into the driving chamber 401 again, thereby performing the circulation operation of the drain device 70.

In some embodiments, the fluid supply 900 is the output of a municipal tap water line, and the fluid injected into the drive chamber 401 or the driven chamber 402 is tap water. In other embodiments, the fluid supply source 900 may be an output of a municipal tap water pipeline after passing through a pressure pump, or a pumping output of an external pump of the sanitary fixture 100 to an external water storage.

The flush mechanism 40 can have a variety of configurations.

In some embodiments, the flush mechanism 40 includes a primary side housing 41, a secondary side housing 42, and a piston assembly 43. The piston assembly 43 is movably disposed through the primary side housing 41 such that the primary side housing 41 cooperates with the piston assembly 43 to form the drive chamber 401. The piston assembly 43 is movably disposed through the secondary housing 42 such that the secondary housing 42 cooperates with the piston assembly 43 to form the driven chamber 402.

In the embodiment shown in fig. 2, the piston assembly 43 includes a driving plate 431, a transition rod 432, and a driven plate 433 connected in this order. The driving plate 431 is movably accommodated in the primary side housing 41, and forms the driving chamber 401 in cooperation with the primary side housing 41. The driven plate 433 is movably received in the secondary side housing 42 and cooperates with the secondary side housing 42 to form the driven cavity 402. Specifically, the primary side case 41 is disposed opposite to the opening of the secondary side case 42. When the driving chamber 401 is expanded, the driving plate 431 retreats from the primary side housing 41 and moves, and the driving plate 431 acts on the driven plate 433 through the bridge 432, so that the driven plate 433 moves in a direction deep into the secondary side housing 42, and thus the space of the driven chamber 402 is contracted. More specifically, the primary side case 41 is provided integrally with the secondary side case 42. The primary side housing 41 is provided with a primary side port 411 communicating with the drive chamber 401, and fluid enters and exits the drive chamber 401 through the primary side port 411.

In the embodiment shown in fig. 2, the inner diameter of the secondary side housing 42 is larger than the inner diameter of the primary side housing 41, and the area of the driven plate 433 is larger than that of the driving plate 431, so that the amount of spatial variation of the driven chamber 402 is larger than that of the driving chamber 401 during the drainage of the driven chamber 402, and the volume of fluid discharged from the driven chamber 402 is larger than that of fluid injected into the driving chamber 401.

In the embodiment shown in fig. 2, the flushing mechanism 40 further includes a primary side flexible bellows 412 accommodated in the primary side housing 41, both open ends of the primary side flexible bellows 412 are connected to the primary side housing 41 and an active plate 431, respectively, and a gap is provided between the active plate 431 and the inner wall of the primary side housing 41. During the process that the active plate 431 enters or exits the main side housing 41, the wall body of the main side flexible bellows 412 is folded or unfolded accordingly, and since the main side flexible bellows 412 has sealability, the sealing effect of the driving chamber 401 can be ensured, and the smoothness of the movement of the active plate 431 in the main side housing 41 can be ensured.

Further, in some embodiments, to avoid excessive expansion of the drive chamber 401 and damage to the primary side flexible bellows 412 due to a drive failure of the compression drive member 44, a pressure relief flow passage 434 is formed in the active plate 431 for communication with the drive chamber 401, and the piston assembly 43 further includes a pressure relief valve element 435 for normally blocking the pressure relief flow passage 434 and a pressure relief push block 436 connected to the primary side housing 41. In the embodiment shown in fig. 2 and 5, the pressure relief valve element 435 abuts against the port of the pressure relief flow passage 434 by the elastic member, and the pressure relief push block 436 is provided near the edge of the opening of the primary side housing 41, and when the active plate 431 is about to be detached from the opening of the primary side housing 41 during expansion of the drive chamber 401, the pressure relief push block 436 abuts against the pressure relief valve element 435, so that the pressure relief valve element 435 is separated from the port of the pressure relief flow passage 434, and the fluid in the drive chamber 401 overflows through the pressure relief flow passage 434, thereby preventing excessive expansion of the drive chamber 401. In some embodiments not shown, it is also possible for a local inner wall of the primary side housing 41 to deform, and the pressure relief valve cartridge 435 exits the port of the pressure relief flow passage 434 under abutment of the deformed inner wall of the primary side housing 41.

In the embodiment shown in fig. 2, the flushing mechanism 40 further includes a secondary flexible bellows 422 accommodated in the secondary housing 42, both open ends of the secondary flexible bellows 422 are respectively connected to the secondary housing 42 and a driven plate 433, and a gap is provided between the driven plate 433 and the inner wall of the secondary housing 42.

In some embodiments, flush mechanism 40 has a compression driver 44 for abutting against the inner wall of driven chamber 402. When the driven chamber 402 contracts to its inner wall to abut the compression driver 44, the compression driver 44 acts on the primary side switching trigger 51 of the first control valve 50 to switch the first control valve 50 from the flow passing state to the flow blocking state. When the space of the driven chamber 402 is reduced due to compression, at least two opposite inner walls of the driven chamber 402 exist, and the distance between the two inner walls is reduced, when the compression transmission member 44 is installed on one of the inner walls, the inner wall on the opposite side will abut against the compression transmission member 44, so that the compression transmission member 44 transmits to the main-side switching trigger member 51 of the first control valve 50, and the main-side switching trigger member 51 adjusts the internal state of the first control valve 50.

In the embodiment shown in fig. 2, the compression driver 44 is mounted on the secondary housing 42, and the piston assembly 43 extends into the secondary housing 42 to some extent to abut against the compression driver 44. Specifically, the compression transmission member 44 is disposed through the secondary housing 42, one end of the compression transmission member 44 faces the driven plate 433, one end of the compression transmission member 44 is biased toward the driven plate 433 by the elastic member, and the other end of the compression transmission member 44 is exposed out of the secondary housing 42. When the driven plate 433 penetrates into the secondary housing 42 to a predetermined extent, it abuts against one end of the compression actuator 44, pushing the compression actuator 44 out of the secondary housing 42, and the other end of the compression actuator 44 acts on the primary side switching trigger 51 of the first control valve 50. In the embodiment shown in fig. 2, the other end of the compression actuator 44 acts on the primary side switching valve member through an intermediate actuator member. In some embodiments, not shown, the other end of the compression driver 44 is directly connected to the primary side switch trigger 51 of the first control valve 50.

In some embodiments, the flushing mechanism 40 further includes a liquid level detecting element 45 disposed through the driven chamber 402, and the liquid level detecting element 45 is floated up and down by the liquid level in the driven chamber 402. When the liquid level detection member 45 rises to a predetermined height, it acts on the secondary-side switching trigger 81 of the second control valve 80 to switch the second control valve 80 from the on state to the off state.

In the embodiment shown in fig. 2, the secondary side case 42 is disposed at an upper side of the primary side case 41, and the liquid level detection member 45 is disposed at an upper portion of the secondary side case 42, the density of the liquid level detection member 45 being lower than that of the fluid. When the liquid level in the driven chamber 402 is high, the part of the liquid level detection member 45 in the driven chamber 402 is submerged by the fluid, the buoyancy causes the liquid level detection member 45 to move to the outside of the secondary housing 42 and act on the secondary switching trigger 81 of the second control valve 80, and the second control valve 80 cuts off the fluid supplementing flow passage to stop supplementing the fluid into the driven chamber 402. When the driven plate 433 moves down to lower the liquid level in the driven chamber 402, the liquid level is lower than the liquid level detection element 45, the liquid level detection element 45 moves down to leave the secondary switching trigger 81 of the second control valve 80, the second control valve 80 is allowed to recover the flow of the fluid infusion channel, and the fluid provided by the fluid supply source 900 is injected into the driven chamber 402. Specifically, the secondary side case 42 is provided with a secondary side port 421, and a fluid replacement flow path is formed in this order among the fluid supply source 900, the second control valve 80, and the secondary side port 421.

In some embodiments, first control valve 50 is provided separately from relief valve 20 so as to accommodate the accommodation space of body 30. In the embodiment shown in fig. 2, the relief valve 20 is disposed adjacent to the main side case 41 or directly connected to the main side case 41, and the first control valve 50 is installed in a layout according to the remaining space within the body 30.

The first control valve 50 has various structural forms.

In some embodiments, the first control valve 50 is provided with a main-side output chamber 52 and a main-side internal pilot port 53 communicating with the main-side output chamber 52. The first control valve 50 is also provided with a primary side septum 54 for abutting against the primary side internal pilot port 53. The first control valve 50 is provided with a main side input chamber 55 on a side of the main side diaphragm 54 facing away from the main side internal pilot port 53, the main side input chamber 55 being for communication with the fluid supply source 900. The first control valve 50 is also provided with a primary side equalizing pipe 57 having one end for communicating with the primary side output chamber 52. The primary side switching trigger 51 is used to control the connection and disconnection of the other end of the primary side equalizing pipe 57 to the primary side input chamber 55. The primary side output chamber 52 is provided for communication to the relief valve 20.

Specifically, when the main side switching trigger 51 isolates the other end of the main side equalizing tube 57 from the main side input chamber 55, the fluid supplied from the fluid supply source 900 enters the main side input chamber 55, the pressure of the fluid in the main side input chamber 55 acts on one side of the main side septum 54, and the other side of the main side septum 54 is not subjected to the fluid pressure, and in order to achieve the force balance, the other side of the main side septum 54 abuts against the edge around the main side internal guide port 53, so that the main side input chamber 55 and the main side output chamber 52 are sealed and isolated by the main side septum 54. Thereby preventing fluid provided by the fluid supply 900 from communicating through the primary side outlet chamber 52 to the drive chamber 401.

When the main-side switching trigger 51 causes the other end of the main-side equalizing tube 57 to communicate with the main-side input chamber 55, the fluid in the main-side input chamber 55 enters into the main-side output chamber 52 through the main-side equalizing tube 57, the fluid in the main-side output chamber 52 also provides a pressure action to the side of the main-side diaphragm 54 facing the main-side internal guide port 53 after the fluid is accumulated in the main-side output chamber 52, the main-side diaphragm 54 leaves the main-side internal guide port 53 after the fluid pressure is equalized on both sides of the main-side diaphragm 54, and the fluid in the main-side input chamber 55 enters into the main-side input chamber 55 through the gap between the main-side diaphragm 54 and the main-side internal guide port 53, the gap between the main-side diaphragm 54 and the main-side internal guide port 53 is further enlarged due to the pressure of the fluid, and the fluid flowing from the main-side input chamber 55 enters into the main-side output chamber 52 through the main-side internal guide port 53. After the primary side input chamber 55 and the primary side output chamber 52 are communicated through the primary side internal pilot port 53, the pressure of the fluid is mainly applied to the relief valve 20 at the rear end.

In the embodiment shown in fig. 3, the primary side input chamber 55 communicates with one end of a primary side balance tube 57 through a primary side pilot hole 56. The primary side switching trigger 51 is brought close to the primary side guide hole 56 by the elastic member to isolate the primary side input chamber 55 from one end of the primary side balance pipe 57. When the liquid level detection member 45 acts on the primary side switch trigger member 51, the primary side switch trigger member 51 moves away from the primary side guide hole 56 and unseals the primary side guide hole 56, isolating the primary side input cavity 55 from one end of the primary side balance tube 57.

By controlling the conduction of the primary-side equalizing pipe 57 by the primary-side switching trigger 51, the primary-side diaphragm 54 is made to leave the primary-side internal pilot port 53 by the pressure of the fluid, so that after the communication between the primary-side input chamber 55 and the primary-side output chamber 52, both have a large through-flow cross section through the primary-side internal pilot port 53.

Relief valve 20 has a variety of configurations.

In some embodiments, the relief valve 20 is provided with a fluid inlet 211a, a fluid outlet 212a, and a drain 212e, and the first control valve 50 is connected between the fluid inlet 211a and the fluid supply source 900. The liquid outlet 212a communicates with the drive chamber 401, and the drain 212e communicates with the driven chamber 402. In the through-flow state, the liquid outlet 212a communicates with the liquid inlet 211a and is isolated from the drain 212e. In the flow blocking state, the liquid outlet 212a communicates with the drain 212e and is isolated from the liquid inlet 211a to replenish the fluid in the driving chamber 401 to the driven chamber 402 through the drain 212e.

In some embodiments, the excess flow valve 20 includes a main valve body 21 and a spool assembly 22 movably disposed within the main valve body 21. The main valve body 21 has a main flow passage 212b communicating the liquid inlet 211a and the liquid outlet 212a. In the flow passing state, the spool assembly 22 functions to isolate the drain port 212e from the primary flow passage 212b. In the flow blocking state, the valve core assembly 22 releases the isolation between the drain port 212e and the main flow passage 212b, so that after the drain of the driven chamber 402 is completed, the fluid in the driving chamber 401 is guided into the driven chamber 402 during the water replenishing of the driven chamber 402, and the fluid in the driving chamber 401 can be drained and the water replenishing of the driven chamber 402 can be accelerated.

In the embodiment shown in fig. 8, the valve body assembly 22 has a first state in which the drain port 212e is isolated from the main flow passage 212b, and a second state in which the drain port 212e communicates with the main flow passage 212b. The delay assembly 23 has an adjustment chamber 234 of variable size. The modulation chamber 234 communicates with the primary flow passage 212b, and when the modulation chamber 234 expands to a predetermined extent upon fluid injection, the time delay assembly 23 acts on the spool assembly 22 to transition the spool assembly 22 from the first state to the second state.

Before the main valve body 21 is supplied with fluid, the control chamber 234 is emptied. When the fluid starts to flow into the main valve body 21, the valve core assembly 22 is in the first state, the pressure of the fluid forces the valve core assembly 22 to operate, and the valve core assembly 22 thus isolates the drain port 212e from the main flow passage 212b. In the first state, the fluid in the main flow passage 212b is injected into the damper chamber 234 to expand the damper chamber 234, and after the damper chamber 234 is expanded to a predetermined extent, the damper chamber 234 has a certain volume and generates a force on the valve element assembly 22 when being further expanded, so that the valve element assembly 22 is changed from the first state to the second state, and the isolation of the drain port 212e is released, and thus the fluid in the main flow passage 212b can be discharged through the drain port 212e. Since the relief valve 20 is set by adjusting the expansion time of the cavity 234 as the delay time between the two states of the relief valve 20 from the injection of the fluid to the release of the relief port 212e, the unloading delay of the relief valve 20, which needs to be controlled by an electronic device, is avoided, and the unloading overflow of the fluid can be reliably initiated.

Meanwhile, since the overflow valve 20 automatically realizes the delay of opening the drain port 212e, only a control signal needs to be provided for the first control valve 50 or the second control valve 80 in the sanitary ware 100, and the state switching of the overflow valve 20 is controlled by the delay of the overflow valve 20, so that the control flow of the sanitary ware 100 can be simplified, and the stability of the sanitary ware 100 can be improved.

The main valve body 21 has various configurations.

In some embodiments, a drain bayonet 212c is disposed in the main valve body 21, and the drain port 212e is connected to the main flow passage 212b through the drain bayonet 212c. In the first state, the spool assembly 22 sealingly abuts an edge of the drain bayonet 212c.

In some embodiments, main flow passage 212b includes a liquid inlet 211a, a liquid outlet 212a, and a flow-through bayonet 211b, and liquid inlet 211a and liquid outlet 212a communicate through flow-through bayonet 211b. The through-flow bayonet 211b is disposed opposite to the drain bayonet 212c, and the valve body assembly 22 can abut against the periphery of the through-flow bayonet 211b and block the through-flow bayonet 211b. When fluid flows from the fluid inlet 211a to the fluid outlet 212a, the valve core assembly 22 is pushed toward the drain bayonet 212c by fluid pressure. Valve core assembly 22 moves along a through-flow linear path between through-flow bayonet 211b and drain bayonet 212c. When fluid is injected from the fluid inlet 211a, the fluid pushes the valve core assembly 22 away from the through-flow bayonet 211b, and meanwhile, the valve core assembly 22 approaches the drain bayonet 212c, so that the valve core assembly 22 finally moves to an isolation station to block the drain bayonet 212c. Specifically, a flange facing the drain bayonet 212c is formed around the through-flow bayonet 211b, and after the initial stage of through-flow is finished, the valve core assembly 22 is pushed in a reverse direction to be in sealing contact with the flange around the through-flow bayonet 211b, so that the fluid flowing back from the liquid outlet 212a can be prevented from flowing to the liquid inlet 211a, and the valve core assembly 22 can be reliably pushed towards the drain bayonet 212c when the fluid enters from the liquid inlet 211a.

Further, after the primary side switching trigger member 51 is acted upon by the compression transmission member 44, the fluid in the primary side input chamber 55 is allowed to flow into the primary side output chamber 52 through the primary side equalizing pipe 57. Due to the sealing abutment between the spool assembly 22 and the through-flow bayonet 211b, the fluid in the primary side output chamber 52 cannot directly flow to the liquid outlet 212a or the drain port 212e until the primary side output chamber 52 is completely filled with the fluid and the fluid in the primary side output chamber 52 can generate pressure on the primary side diaphragm 54, and then the pressure of the fluid can not continuously act on the spool assembly 22, so that the liquid inlet 211a is communicated with the liquid outlet 212a. Reliable release of the main side guide opening 53 by the main side partition 54 can be ensured by abutment of the valve element assembly 22 against the through-flow bayonet 211b in the initial stage.

In some embodiments, a flange is formed around the drain bayonet 212c toward the inlet 211a, and during the initial stage of flow, the valve core assembly 22 is pushed by fluid pressure along the positive direction of the linear path of flow side to move to the isolation station within the main valve body 21. Valve cartridge assembly 22 sealingly abuts a flange around drain bayonet 212c to prevent fluid in primary flow passage 212b from passing through drain bayonet 212c to drain port 212e at the isolation station.

In the embodiment shown in fig. 8, a drain cavity 212d is formed in the main valve body 21, the drain port 212e communicates with the drain cavity 212d, and the drain bayonet 212c serves as an opening of the drain cavity 212 d. After the initial stage of flow, the fluid in the main flow passage 212b enters the drain cavity 212d through the drain bayonet 212c and is discharged out of the relief valve 20 from the drain cavity 212d through the drain hole 212e.

In some embodiments not shown, it is also possible that the drain port 212e is disposed on one side of the through-flow linear path, and the thickness of the valve core assembly 22 in the direction of the through-flow linear path is greater than the diameter of the drain port 212e. When the drain port 212e moves to a position corresponding to the drain port 212e, the side wall of the valve core assembly 22 blocks the drain port 212e, so that the drain port 212e can be isolated from the main flow passage 212b.

In some embodiments, the main valve body 21 is provided separately so as to mount the spool assembly 22 into the main valve body 21. Specifically, the main valve body 21 includes an outer joint 211 and a main valve housing 212 connected to the outer joint 211. The liquid inlet 211a is formed at the exposed end of the outer joint 211, and the part of the outer joint 211 nested with the main valve housing 212 forms a through-flow bayonet 211b. A main flow passage 212b is formed in the outer joint 211 and the main valve housing 212, respectively, a discharge port 212a is formed in an exposed end of the main valve housing 212, and a drain bayonet 212c and a drain chamber 212d are formed in the main valve housing 212.

In the embodiment shown in fig. 8, after the spool assembly 22 is accommodated in the main valve housing 212, the main valve housing 212 may be fixed to the outer joint 211 by fixing with screws or the like, so that the spool assembly 22 is accommodated in the main valve body 21. Further, a seal ring may be provided at a position where the outer joint 211 is nested and engaged with the main valve housing 212, the seal ring abutting between the outer joint 211 and the main valve housing 212 to prevent the fluid in the main flow passage 212b from leaking from an interface between the outer joint 211 and the main valve housing 212. More specifically, the main valve housing 212 is provided with a protruding tube 212f, and the protruding tube 212f communicates to the main flow passage 212b through a control port 212g of the main valve housing 212.

The valve core assembly 22 has a variety of configurations.

In some embodiments, the spool assembly 22 includes a spool block 221. The valve body 221 is movably disposed in the main flow passage 212b along a through-flow linear path. Specifically, the through-flow linear path of the valve body 221 is located between the liquid inlet 211a and the drain bayonet 212c. The movable path of the spool body 221 is directed to the liquid inlet 211a. More specifically, the through-flow linear path of the spool body 221 is between the through-flow bayonet 211b and the drain bayonet 212c.

In one embodiment, not shown, during the initial stage of flow, the face side of the spool body 221 is pressurized by the injected fluid to urge the spool body 221 to the isolation station in the forward direction of the flow-side linear path. When the valve core body 221 is in the isolation station, the back side of the valve core body 221 is in sealing contact with the edge of the drain bayonet 212c. When the modulation chamber 234 expands to a predetermined extent, the delay assembly 23 transmits fluid pressure to the back side of the spool block 221, causing the spool block 221 to move away from the isolation station and unblocking the drain port 212e from the primary flow passage 212b. Specifically, the face side of the valve body 221 is disposed opposite the back side, the face side of the valve body 221 faces the through-flow bayonet 211b, and the back side of the valve body 221 faces the drain bayonet 212c.

In the embodiment shown in fig. 8 and 9, the first leakage preventing packing 222 is connected to the back side of the valve body 221, and the second leakage preventing packing 223 is connected to the surface side of the valve body 221. In the initial stage of through-flow, the back side of the valve core body 221 is in contact with the flange around the drain bayonet 212c through the first leakage prevention pad 222, and after the initial stage of through-flow is finished, the surface side of the valve core body 221 is in contact with the flange around the drain bayonet 211b through the second leakage prevention pad 223, and the first leakage prevention pad 222 or the second leakage prevention pad 223 has elasticity and can be in full contact with the flange around the drain bayonet 212c or the flange around the drain bayonet 211b, so that the leakage prevention performance of the valve core assembly 22 can be improved.

In the embodiment shown in fig. 8 and 9, to realize the sliding movement of the valve body assembly 22 in the main flow passage 212b, a through-flow guide frame 221a is connected to the surface side of the valve body 221, a drain guide frame 221b is connected to the back side of the valve body 221, the through-flow guide frame 221a is slidably received in the outer joint 211, and the drain guide frame 221b is slidably received in the drain cavity 212 d. The through-flow guide frame 221a and the drain guide frame 221b are provided with through-flow holes, respectively. When the valve body 221 abuts against the flange around the drain bayonet 212c via the first leakage prevention gasket 222, the portion of the through-flow guide frame 221a is still accommodated in the main flow passage 212b between the liquid inlet 211a and the through-flow bayonet 211b, and the fluid injected from the liquid inlet 211a flows through the through-flow hole of the through-flow guide frame 221a to the liquid outlet 212a. After the spool body 221 leaves the isolation station, the drain guide frame 221b is partially received in the drain cavity 212d, and the fluid in the main flow passage 212b enters the drain cavity 212d through the through hole of the drain guide frame 221b and then flows out of the relief valve 20 through the drain hole 212e.

The delay assembly 23 has various structural forms.

In some embodiments, the time delay assembly 23 includes a housing 231 connected to the main valve body 21, a piston member 232 movably connected to the housing 231, and a transmission member 233 connected to the piston member 232, wherein the piston member 232 and the housing 231 are sealingly engaged to form a regulation chamber 234. When the adjustment chamber 234 is replenished with fluid to expand, the piston member 232 moves along the control-side linear path. When the adjusting chamber 234 expands to a predetermined degree, the piston member 232 can drive the transmission member 233 to approach and push the valve element assembly 22, so as to transmit the liquid pressure to the valve element assembly 22, and make the valve element 221 leave the isolation station, thereby ending the initial stage of the through-flow.

In the embodiment shown in fig. 8 and 10, the time delay assembly 23 further comprises a flexible sealing member 236 for forming an inner wall of the adjustment chamber 234, the flexible sealing member 236 is tapered to have a large end and a small end, the large end of the flexible sealing member 236 is sealingly connected to the housing 231, and the small end of the flexible sealing member 236 is sealingly connected to the piston member 232. Specifically, when no fluid is injected into the regulation chamber 234, the space of the regulation chamber 234 is contracted, and the piston member 232 is abutted against the housing 231 for forming the inner wall of the regulation chamber 234. When the primary flow passage 212b gradually injects fluid into the regulation chamber 234, the space of the regulation chamber 234 is expanded, and at the same time, the piston member 232 moves away from the inner wall of the housing 231 for forming the regulation chamber 234 and transmits the pressure of the fluid to the spool body 221 through the transmission member 233 when the regulation is expanded to a predetermined degree.

More specifically, as shown in fig. 8 and 10, the area of the piston member 232 that is exposed to the fluid pressure within the regulated chamber 234 is greater than the area of the valve cartridge assembly 22 that is exposed to the fluid pressure within the primary flow passage 212b during the initial stage of flow-through. Since the regulation chamber 234 communicates with the main flow passage 212b through the delay flow passage 235 at the initial stage of through-flow, when the regulation chamber 234 expands to a predetermined extent, the spool body 221 blocks the movement of the piston member 232 through the transmission member 233, restricting further expansion of the regulation chamber 234, the flow rate through the delay flow passage 235 gradually decreases, but the pressure between the regulation chamber 234 and the main flow passage 212b gradually balances. Since the pressure of the fluid on the valve core 221 or the piston 232 is related to the pressure and the force-bearing area, when the pressure between the throttle chamber and the main flow passage 212b is close, the force-bearing area of the piston 232 facing the regulating chamber 234 is larger than the force-bearing area of the valve core 221, so that the force of the piston 232 is larger than the force of the valve core 221, and when the piston 232 pushes the valve core assembly 22 through the transmission member 233, the valve core 221 can overcome the fluid pressure on the surface side and leave the isolation station.

In the embodiment shown in fig. 10, to ensure the sealing performance, the small end of the sealing flexible member 236 is in a closed configuration, and the large end is in an open configuration. The piston member 232 includes a first piston block 232a and a second piston block 232b, and the closed end of the sealing flexible member 236 is clamped between the first piston block 232a and the second piston block 232b, thereby providing a good sealing property for the adjustment chamber 234 and reducing resistance to movement of the piston member 232. Specifically, the first piston block 232a is disposed outside the adjustment chamber 234 and connected to the transmission member 233, the second piston block 232b is disposed inside the adjustment chamber 234, and the first piston block 232a and the second piston block 232b are fixedly connected by screws or other fixing means.

In the embodiment shown in fig. 8 and 10, the housing 231 includes a first sub-housing 231a and a second sub-housing 231b, the first sub-housing 231a is used for cooperating with the piston member 232 to form the adjusting chamber 234, and the first sub-housing 231a is connected to the main valve housing 212 through the second sub-housing 231 b. Specifically, the second sub-housing 231b is provided integrally with the main housing 212 to simplify the assembly of the relief valve 20. More specifically, the large end of the sealing flexible member 236 extends radially with an annular edge, and the annular edge is clamped between the first sub-shell 231a and the second sub-shell 231b, so that the assembly of the sealing flexible member 236 can be facilitated, and the sealing performance of the adjustment chamber 234 can be improved.

In an embodiment not shown, the inner cavity of the housing 231 may be cylindrical, and the edge of the piston member 232 may be in sealing contact with the inner wall of the housing 231 when moving relative to the housing 231, so that an adjusting cavity 234 with a variable size is formed between the piston member 232 and the inner wall of the housing 231. In other embodiments, the piston member 232 and the housing 231 may be sealed in other manners.

In the embodiment shown in fig. 8, the transmission member 233 pushes the back side of the valve body 221 to separate the valve body 221 from the drain port 212c. Specifically, the main valve housing 212 is formed with a plug hole, and the transmission member 233 is rod-shaped and movably inserted into the plug hole along the axial direction of the plug hole to limit the moving direction of the piston member 232, so that the expansion degree of the adjustment chamber 234 and the moving distance of the piston member 232 along the linear path of the control side have a more linear relationship, and the adjustment chamber 234 can push the valve core 221 each time the adjustment chamber 234 expands to a predetermined degree. More specifically, the diameter of the transmission member 233 is smaller than the inner diameter of the drain cavity 212d to avoid blocking the fluid in the drain cavity 212d from flowing toward the drain port 212e.

In some embodiments, the time delay assembly 23 further includes a first elastic member 238 connected to the valve core assembly 22, and the first elastic member 238 is used for moving the valve core assembly 22 away from the drain bayonet 212c to reduce the thrust requirement of the transmission member 233 on the valve core assembly 22. Specifically, as shown in fig. 9, the first elastic member 238 abuts between the valve core assembly 22 and the main valve body 21, and can apply an elastic force from the drain bayonet 212c toward the through-flow bayonet 211b to the valve core assembly 22, so as to ensure that the fluid injected from the fluid inlet 211a can push the valve core body 221 to move before the initial stage of through-flow. More specifically, the first elastic member 238 is a compression spring, and abuts between the back side of the spool body 221 and the inner wall of the drain chamber 212 d.

In some embodiments, the delay assembly 23 further includes a second elastic member 239 connected to the transmitting member 233 or the piston member 232, wherein the second elastic member 239 is used for moving the transmitting member 233 or the piston member 232 in a direction to compress the regulation chamber 234 after the initial stage of the through-flow is completed, so as to discharge the fluid in the regulation chamber 234 to the main flow passage 212b along the delay flow passage 235. In the embodiment shown in fig. 8 and 10, the second elastic member 239 is a compression spring and is accommodated in the second sub-housing 231b, and both ends of the second elastic member 239 abut between the main housing 212 and the first piston block 232a, respectively, so that the adjustment chamber 234 can be compressed by the piston member 232. Specifically, the side of the first piston block 232a facing the second elastic member 239 is provided with an annular groove to receive an end of the second elastic member 239 and position the second elastic member 239.

In some embodiments, the delay assembly 23 further comprises a tube 237, one end of the tube 237 is connected to the primary flow passage 212b, and the other end is connected to the adjustment chamber 234. In the embodiment shown in fig. 8, one end of the tube 237 is connected to the main valve body 21, and specifically, one end of the tube 237 is sleeved on the convex tube 212 f. In one embodiment, not shown, the other end of tube 237 is coupled to housing 231. The tube body 237 is provided with a delay channel 235 therein, one end of the delay channel 235 is communicated with the main channel 212b, and the other end is communicated with the adjusting chamber 234.

Optionally, in some embodiments, the tube 237 is detachably connected to the main valve body 21 and the housing 231, and the cross-sectional area of the delay flow channel 235 can be changed by replacing the tube 237 with a different inner diameter, so that the flow rate entering the regulating chamber 234 from the main flow channel 212b can be controlled in the initial stage of flow-through, and the time required for the regulating chamber 234 to expand to a predetermined extent and the duration of the initial stage of flow-through can be adjusted to meet the control requirement of the sanitary ware 100.

In some embodiments, the tube 237 is a flexible tube to accommodate the space for the relief valve 20 and to reduce the chance of the tube 237 breaking.

In some embodiments, not shown, when the housing 231 and the main valve body 21 are integrally formed, the delay flow passage 235 is formed on the housing 231 and the main valve body 21, respectively.

In an embodiment not shown, the effect of the transmission member 233 or the piston member 232 pushing the valve core assembly 22 may be removed, and the adjustment chamber 234 may have a certain volume and may generate a force on the primary-side switching trigger member 51 when further expanded after the adjustment chamber 234 is expanded to a predetermined extent, so that the first control valve 50 is changed from the flow-passing state to the flow-blocking state, and the fluid output from the fluid supply source 900 is stopped from being input to the driving chamber 401 through the first control valve 50. In another embodiment, not shown, after the adjustment chamber 234 is expanded to a predetermined extent, the adjustment chamber 234 has a certain volume and is further expanded, the transmission member 233 or the piston member 232 simultaneously exerts a force on the valve core assembly 22 and the primary side switch trigger member 51 to make the valve core assembly 22 change from the first state to the second state and make the first control valve 50 change from the flow-passing state to the flow-blocking state, the first control valve 50 is used to stop the fluid input from the fluid supply source 900, and the flow passage from the driving chamber 401 to the driven chamber 402 is opened.

In some embodiments, spill valve 20 also includes a throttling assembly 24.

Primary flow passage 212b communicates with regulated chamber 234 via a throttling assembly 24, which throttling assembly 24 is used to control the flow of fluid from primary flow passage 212b to regulated chamber 234 during an initial stage of flow-through.

In the embodiment shown in fig. 8, one end of the tube 237 is connected to the main valve body 21, and the other end of the tube 237 is connected to the adjustment chamber 234 through the throttle assembly 24. Specifically, a throttle seat 231c is formed on the outer side of the housing 231, a transition hole 231d is further formed on the housing 231, and the adjusting cavity 234 communicates with the inner cavity of the throttle seat 231c through the transition hole 231d. The throttle assembly 24 includes a throttle body 241 received in the throttle seat 231c and a throttle cover 242 detachably coupled to the throttle seat 231c, and a throttle hole 243 is formed in the throttle body 241. By replacing the throttle body 241 having the orifice 243 with a different size, the flow rate of the fluid flowing from the main flow passage 212b to the regulator chamber 234 can be adjusted. More specifically, the other end of the tube body 237 is nested and fitted with the throttle cap 242, the throttle cap 242 is screwed with the throttle seat 231c, and the tube body 237 is a hose.

Further, a throttle leakage prevention gasket 244 is connected to a side of the throttle body 241 close to the transition hole 231d, and the throttle body 241 and the housing 231 are abutted by the throttle leakage prevention gasket 244 to prevent the fluid from bypassing the throttle hole 243 and flowing into the transition hole 231d. Further, a gap is provided between the edge of the throttle body 241 or the throttle leakage preventing pad 244 and the inner wall of the throttle seat 231c, and the throttle body 241 has a movable gap in the throttle seat 231c in a direction from the throttle body 241 approaching the transition hole 231d to a direction away from the transition hole 231d, so that at the initial stage of through-flow, the fluid flowing from the main flow passage 212b to the regulating chamber 234 pushes the throttle body 241 to be attached to the housing 231, and the fluid can only enter the regulating chamber 234 through the throttle hole 243 limited by the throttle leakage preventing pad 244. After the initial stage of flow-through is finished, the adjusting chamber 234 is compressed to discharge the fluid inside to the main flow passage 212b through the delay flow passage 235, and since the inner diameter of the transition hole 231d is larger than that of the throttle hole 243, and after the throttle body 241 moves away from the transition hole 231d, the fluid in the throttle seat 231c can flow to the hose by bypassing the throttle hole 243 along the gap between the throttle body 241 and the inner wall of the throttle seat 231c and the through hole of the throttle body 241, so that the flow rate of the adjusting chamber 234 when discharging the fluid can be larger than the flow rate entering the adjusting chamber 234 at the initial stage of flow-through, and the emptying of the adjusting chamber 234 can be accelerated.

In one embodiment, not shown, the throttling assembly 24 further comprises a throttling elastic member connected with the throttling core 241 for moving the throttling core 241 away from the transition hole 231d so as to prevent the fluid flowing out of the transition hole 231d from being blocked by the throttling leakage prevention pad 244 after the initial stage of flow-through is finished.

The second control valve 80 has various structural forms.

In some embodiments, a secondary side output chamber 82 and a secondary side internal pilot port 83 are provided in the second control valve 80 in communication with the secondary side output chamber 82. The second control valve 80 is also provided with a secondary side diaphragm 84 for abutting against the secondary side inner lead-in opening 83. The second control valve 80 is provided with a secondary side input chamber 85 at a side of the secondary side diaphragm 84 facing away from the secondary side internal guide port 83, and the secondary side input chamber 85 is used for communicating with the fluid supply source 900. The second control valve 80 is also provided with a secondary side balance pipe 86 having one end for communicating with the secondary side output chamber 82. The secondary side switching trigger 81 is used for controlling the connection and disconnection between the other end of the secondary side balance pipe 86 and the secondary side input cavity 85. The secondary side output chamber 82 is adapted for communication to the driven chamber 402. The second control valve 80 is in the on state when the secondary side input chamber 85 communicates with the secondary side output chamber 82 through the secondary side internal pilot port 83. The second control valve 80 is in an off state when the secondary side input chamber 85 is isolated from the secondary side output chamber 82 by the secondary side diaphragm 84.

The operation principle of the embodiment shown in fig. 2 and 6 is as follows:

in the initial state, the fluid in the drive chamber 401 is evacuated and the active plate 431 is in a position deep into the primary side housing 41. While the driven chamber 402 is fully expanded and stores fluid. The drain port 212e of the relief valve 20 communicates with the main flow channel. Fluid supplied by the fluid supply 900 enters the primary side input chamber 55 but is blocked from entering the primary side output chamber 52 by the primary side septum 54. Further, since the fluid level in the driven chamber 402 is high, the fluid level detector 45 floats up and acts on the secondary-side switching trigger 81 to close the second control valve 80, thereby stopping the supply of the fluid from the fluid supply source 900 to the driven chamber 402.

The primary side switch trigger 51 is operated to move the primary side switch trigger 51 away from the primary side guide 56 and the fluid in the primary side input chamber 55 enters the primary side output chamber 52 through the primary side guide 56 and the primary side balance tube 57 in turn. After the main-side output chamber 52 is filled with the fluid, the main-side partition 54 is opened from the main-side internal lead port 53, so that the fluid in the main-side input chamber 55 enters the main-side output chamber 52 through the main-side internal lead port 53 having a large area. The spool assembly 22 of the relief valve 20 is shifted to the first state by fluid from the primary side output chamber 52 to place the drive chamber 401 in communication with the fluid supply source 900 while being isolated from the driven chamber 402. The fluid supplied from the fluid supply source 900 is injected into the driving chamber 401 to move the driving plate 431 out of the primary side housing 41, and simultaneously the driving plate 431 acts on the driven plate 433 through the transition rod 432 to move the driven plate 433 deep into the secondary side housing 42, the space of the driven chamber 402 is contracted, and the fluid reserved in the driven chamber 402 is discharged to the body 30 through the secondary side port 421.

When the space in the driven chamber 402 is contracted to a certain extent, the driven plate 433 abuts against the compression transmission member 44, and the main-side switching trigger 51 is restored to the state of abutting against the main-side guide hole 56 by the compression transmission member 44. As the pressure of the fluid within the primary side output chamber 52 gradually decreases, the primary side diaphragm 54 recovers under its own shape memory properties into abutment with the primary side internal pilot port 53, blocking the fluid supply 900 from providing continued injection of fluid into the drive chamber 401, the drive chamber 401 ceases to expand due to the loss of injection of fluid, and the drainage of the driven chamber 402 ends. After the drainage of the slave chamber 402 is completed, the delay of the relief valve 20 is completed, and the drain port 212e communicates with the main flow passage 212b.

The piston assembly 43 is moved toward the primary side housing 41 by the reset actuator 46, the follower plate 433 is withdrawn from the secondary side housing 42, the water level in the follower chamber 402 is lowered, the fluid level detecting member 45 floats down away from the secondary side switching trigger 81 of the second control valve 80, the second control valve 80 is opened, and the fluid supply source 900 is additionally communicated to the follower chamber 402. After the reserve fluid in the slave chamber 402 increases, the weight of the fluid in the slave chamber 402 compresses the drive chamber 401 via the piston assembly 43 and the fluid in the drive chamber 401 is displaced under pressure through the spill valve 20 to the slave chamber 402. In the embodiment shown in fig. 2, the return actuator 46 is a tension spring and is connected between the follower plate 433 and the primary side housing 41.

When the driven plate 433 moves to the limit in the direction of withdrawing from the secondary-side housing 42, the driven chamber 402 cannot be further expanded, and the fluid level in the driven chamber 402 gradually rises until the fluid level detection member 45 floats up and acts on the secondary-side switching trigger 81, so that the second control valve 80 is closed, and the fluid supply source 900 stops supplying fluid into the driven chamber 402.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A drain, comprising:

2. The drainage apparatus according to claim 1, wherein said overflow valve is provided with a liquid inlet, a liquid outlet, and a drain outlet, said first control valve being connected between said liquid inlet and a fluid supply source; the liquid outlet is communicated to the driving cavity, and the drainage port is communicated to the driven cavity; under the through-flow state, the liquid outlet is isolated from the drainage port; in the flow-interrupting state, the liquid outlet is communicated with the drainage port.

3. The drain device according to claim 2, wherein the overflow valve comprises a main valve body and a valve core assembly movably arranged in the main valve body; the main valve body is provided with a main flow passage which is communicated with the liquid inlet and the liquid outlet; in the through-flow state, the valve core assembly is used for isolating the drain port from the main flow channel; in the flow cutoff state, the valve core assembly releases the isolation between the drain port and the main flow passage.

4. The drain device according to claim 3, wherein the valve core assembly has a first state isolating the drain port from the primary flow passage and a second state communicating the drain port with the primary flow passage; the overflow valve also comprises a time delay assembly, and the time delay assembly is provided with an adjusting cavity with variable size; the adjusting cavity is communicated with the main flow passage; when the adjusting cavity is expanded to a preset degree after fluid is injected, the time delay assembly acts on the valve core assembly to enable the valve core assembly to be changed from the first state to the second state; alternatively, the time delay assembly may act on the first control valve to switch the first control valve from the flow-passing state to the flow-blocking state when the regulation chamber is expanded to a predetermined extent upon fluid injection.

5. The drain device according to claim 1, wherein the flush mechanism has a compression drive for abutting against an inner wall of the driven chamber; when the driven chamber contracts to the state that the inner wall of the driven chamber is abutted with the compression transmission member, the compression transmission member acts on the main side switching trigger member of the first control valve to enable the first control valve to be switched from the through-flow state to the cut-off state.

6. The water discharge apparatus according to claim 5, wherein a main side output chamber and a main side internal guide port communicating with the main side output chamber are provided in the first control valve; the first control valve is further provided with a primary side septum for abutting against the primary side internal pilot port; the first control valve is provided with a main side input cavity at one side of the main side diaphragm, which is opposite to the main side internal guide opening, and the main side input cavity is used for being communicated with a fluid supply source; the first control valve is also provided with a main side balance pipe of which one end is communicated with the main side output cavity; the main side switching trigger piece is used for controlling the connection and disconnection between the other end of the main side balance pipe and the main side input cavity.

7. The drain device according to claim 5, wherein the flushing mechanism comprises a secondary housing and a piston assembly movably disposed through the secondary housing to cooperate to form the driven chamber; the compression transmission piece is installed on the secondary side shell, and the piston assembly is abutted to the compression transmission piece when penetrating into the secondary side shell.

8. The drainage device according to claim 1, wherein the flushing mechanism further comprises a liquid level detector penetrating through the driven cavity, and the liquid level detector is floated and lifted by the liquid level in the driven cavity; and the liquid level detection part acts on the secondary side switching trigger part of the second control valve when rising to a preset height, so that the second control valve is switched from an on state to an off state.

9. The drain device according to claim 1, wherein the first control valve and the relief valve are provided separately.

10. A sanitary installation, comprising: the drain device according to any one of claims 1 to 9 and a body connected to the drain device; the body is provided with a liquid pool, the bottom of the liquid pool is provided with a sewage draining exit, and fluid discharged from the driven cavity is output to the liquid pool and/or the sewage draining exit of the body so as to flush the inner wall of the liquid pool and/or discharge sewage from the sewage draining exit.