CN220286530U - Check valve, flushing assembly and toilet - Google Patents

Abstract

The utility model discloses a check valve, a flushing assembly and a closestool, wherein the check valve comprises a valve seat, a return spring, a valve core and a first sealing ring; the valve seat comprises a first installation tube and a second installation tube which are sleeved with each other, the outer wall of the first installation tube is connected with the inner wall of the second installation tube, and a drainage channel is formed between the first installation tube and the second installation tube; one end of the reset spring is sleeved outside the first mounting tube and abuts against the inner wall of the second mounting tube; the valve core comprises a shaft body and a stop body, one end of the shaft body penetrates through the first mounting tube, the other end of the shaft body penetrates through a reset spring to be connected with the stop body, the other end of the reset spring is propped against the stop body, and the periphery of the stop body is arranged at intervals with the inner wall surface of the second mounting tube; the first sealing ring is arranged between the inner wall of the second mounting tube and the periphery of the stop body. Through the scheme, the stability of the valve core can be improved.

Description

Check valve, flushing assembly and toilet

Technical Field

The utility model relates to the technical field of bathrooms, in particular to a check valve, a flushing assembly and a closestool.

Background

The existing closestool is generally provided with two sets of flushing pipelines, namely a washing ring pipeline and a main flushing pipeline, wherein the pipe orifice of the main flushing pipeline is lower than the water level in the closestool, so that sewage can enter the main flushing pipeline, a check valve is further arranged in the main flushing pipeline in order to avoid sewage backflow caused by air pressure change in the pipeline, and liquid in the main flushing pipeline can only pass through the check valve in one direction.

However, in the conventional check valve, the valve core is not stable enough in the opening state in the unidirectional liquid passing process, and is easy to vibrate under the impact of liquid, and is worn with the valve seat to generate abnormal sound.

Disclosure of Invention

The utility model mainly aims to provide a check valve, which aims to improve the stability of a valve core of the check valve.

To achieve the above object, the present utility model provides a check valve for a flush assembly of a toilet, the check valve comprising:

the valve seat comprises a first installation tube and a second installation tube which are sleeved with each other, the outer wall of the first installation tube is connected with the inner wall of the second installation tube, and a drainage channel is formed between the first installation tube and the second installation tube;

one end of the return spring is sleeved outside the first mounting pipe and abuts against the inner wall of the second mounting pipe;

the valve core comprises a shaft body and a stop body, one end of the shaft body penetrates through the first mounting tube, the other end of the shaft body penetrates through the reset spring to be connected with the stop body, the other end of the reset spring is propped against the stop body, and the periphery of the stop body is arranged at intervals with the inner wall surface of the second mounting tube; the method comprises the steps of,

and the first sealing ring is arranged between the inner wall of the second mounting tube and the periphery of the stop body.

In some embodiments of the present utility model, the check valve further includes a mounting ring, a clamping protrusion is disposed on an end surface of the second mounting tube facing one end of the mounting ring, a clamping groove is disposed on the first sealing ring, the clamping protrusion is clamped into the clamping groove, the mounting ring is fixed on one end of the second mounting tube and abuts against the first sealing ring, and a groove wall of the clamping groove is disposed between an inner wall of the second mounting tube and a periphery of the stop body.

In some embodiments of the present utility model, in the closed state of the non-return valve, the ratio of the axial length of the first installation tube to the axial length of the shaft body is 1/3-2/3.

In some embodiments of the present utility model, a plurality of connecting ribs are arranged on the inner wall of the second mounting tube in a protruding manner, the connecting ribs are connected with the outer wall of the first mounting tube, and one end of the return spring, which is far away from the stop body, is abutted against the connecting ribs.

In some embodiments of the present utility model, a side of the stop body facing away from the shaft body is provided with an umbrella-shaped diversion slope, and a periphery of the diversion slope abuts against the first sealing ring.

In some embodiments of the present utility model, a surface of the stop body facing the shaft body is concavely provided with an annular groove, and one end of the return spring abuts against the bottom wall of the annular groove.

The utility model also provides a flushing assembly, which comprises a liquid storage tank, a water pump, a switching valve, an upper flushing pipe, a main flushing pipe and the check valve; wherein,

a liquid storage cavity is arranged in the liquid storage tank;

the water suction pump is positioned at the outer side of the liquid storage tank and is close to the bottom wall of the liquid storage tank, and the water suction pump is communicated with the bottom of the liquid storage cavity;

the switching valve is provided with a water inlet pipe joint, an upper flushing pipe joint and a main flushing pipe joint, the water inlet pipe joint is communicated with the water suction pump, the upper flushing pipe joint is communicated with the upper flushing pipe, and the main flushing pipe joint is communicated with the main flushing pipe;

the check valve is installed at the main wash pipe joint to prevent sewage from flowing back from the main wash pipe to the switching valve.

In some embodiments of the utility model, the flushing assembly further comprises a bracket, a mounting table is formed on one side of the liquid storage tank, a limiting chute is formed on the bottom surface of the mounting table, a limiting rib plate is arranged on the top of the bracket and is in sliding fit in the limiting chute, and the water pump is mounted at the bottom end of the bracket.

In some embodiments of the utility model, the flush assembly further comprises a vacuum breaker disposed at the top of the tank, the vacuum breaker being in communication between the suction pump and the inlet fitting.

In some embodiments of the present utility model, the flushing assembly further includes a cylindrical filter screen and a water pipe, the cylindrical filter screen is disposed at the bottom of the liquid storage cavity, one end of the cylindrical filter screen is fastened and fixed with one end of the water pipe, and the other end of the water pipe is communicated with the water pumping end of the water pump.

The utility model also provides a closestool, which comprises a shell and the flushing assembly; the shell is provided with an assembly cavity, a washing ring water outlet and a main flushing water outlet, the flushing assembly is assembled in the assembly cavity, the upper flushing pipe is communicated with the washing ring water outlet, and the main flushing pipe is communicated with the main flushing water outlet.

When the check valve is used for water supply, the shaft body of the valve core slides in the first mounting pipe, the matching structure of the shaft body and the first mounting pipe is stable, when the flow rate of liquid in the check valve is larger, the compression amount of the return spring is larger, the distance between the stop body and the first mounting pipe is closer, the first mounting pipe can stably support the valve core, the valve core is not easy to vibrate, and therefore vibration abrasion of the valve core and the valve seat is avoided.

When the closestool is flushed, the water pump works to pump water in the liquid storage tank and convey the water to the switching valve in a pressurized mode, the switching valve discharges the water along the upper flushing pipe joint and the main flushing pipe joint, the two flushing modes are combined, the flushing cleanliness is high, and water is saved; in addition, as the main flushing pipe joint is provided with the check valve, after flushing is finished, the check valve can effectively prevent dirty water from flowing back to the switching valve from the main flushing pipe, so that the water in the flushing assembly is not polluted by the dirty water.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a toilet according to an embodiment of the present utility model;

FIG. 2 is a schematic view of an embodiment of a flush assembly according to the present utility model;

FIG. 3 is an exploded view of one embodiment of a flush assembly of the present utility model;

FIG. 4 is a schematic view of an embodiment of a check valve according to the present utility model;

FIG. 5 is an exploded view of one embodiment of the check valve of the present utility model;

FIG. 6 is a cross-sectional view of one embodiment of a check valve of the present utility model;

FIG. 7 is an enlarged view at A in FIG. 6;

FIG. 8 is an exploded view of a vacuum breaker in the flush assembly of the present utility model;

FIG. 9 is a cross-sectional view of a vacuum breaker in a flush assembly of the present utility model;

FIG. 10 is a schematic view of a flush assembly according to another embodiment of the present utility model;

FIG. 11 is an enlarged view at B in FIG. 10;

FIG. 12 is a cross-sectional view of the toilet of the present utility model;

fig. 13 is a schematic view of the structure of the housing in the toilet of the present utility model.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1 to 5, a check valve 100 according to the present utility model is applied to a flush assembly 1000 of a toilet 2000, and a main flushing pipe joint 430 of the switch valve 400 installed in the flush assembly 1000 is used for preventing sewage from flowing back into the flush assembly 1000 of the toilet 2000, wherein the check valve 100 comprises a valve seat 110, a return spring 120, a valve core 130 and a first sealing ring 140.

The valve seat 110 includes a first installation tube 111 and a second installation tube 112 which are sleeved with each other, an outer wall of the first installation tube 111 is connected with an inner wall of the second installation tube 112, and a drainage channel 115 is formed between the first installation tube 111 and the second installation tube 112; the first mounting tube 111 and the second mounting tube 112 are generally circular tubes, and the first mounting tube 111 and the second mounting tube 112 may be made of metal or plastic; the specific connection modes of the two are various, for example, one end of the first mounting tube 111 and one end of the second mounting tube 112 are provided with an annular plate, an outer ring of the annular plate is connected with the second mounting tube 112, an inner ring of the annular plate is connected with the first mounting tube 111, the second mounting tube 112 and the annular plate are integrally formed, and a drainage channel 115 is formed in the annular plate; for another example, the side wall of the second installation tube 112 is convexly provided with an internal thread cylinder, the side wall of the first installation tube 111 is penetrated with an assembly hole, and the screw connector is in threaded connection with the internal thread cylinder and penetrates through the assembly hole; there are many other ways to connect the first mounting tube 111 and the second mounting tube 112, and the two are not particularly limited herein.

One end of the return spring 120 is sleeved outside the first mounting tube 111 and abuts against the inner wall of the second mounting tube 112; the valve core 130 comprises a shaft body 131 and a stop body 132, one end of the shaft body 131 penetrates through the first mounting tube 111, the other end of the shaft body 131 penetrates through the return spring 120 to be connected with the stop body 132, the other end of the return spring 120 is propped against the stop body 132, and the periphery of the stop body 132 is arranged at intervals with the inner wall surface of the second mounting tube 112; the first sealing ring 140 is installed between the inner wall of the second installation tube 112 and the periphery of the stopper 132.

The shaft body 131 and the stop body 132 are generally integrally formed, so that the structural strength is high, the number of parts is reduced, the assembly is convenient, of course, the shaft body 131 and the stop body 132 can be in threaded connection, clamping connection, welding, hot melting fixation and the like, and the structure is not particularly limited.

The shaft body 131 is in sliding fit with the first mounting tube 111, and a gap between the shaft body 131 and the first mounting tube 111 is generally set to be 0.03mm to 0.5mm, so that smoothness of sliding of the shaft body 131 is guaranteed on one hand, and stability of the shaft body 131 when impacted by water flow is guaranteed on the other hand.

When water is introduced into the check valve 100 in the forward direction, the valve core 130 receives the impact force of the water and pushes against the return spring 120, the return spring 120 compresses, a gap is formed between the stop body 132 and the first sealing ring 140, the water passes through the gap between the valve core 130 and the first sealing ring 140 and flows out of the drainage channel 115, when the forward water is introduced, the check valve 100 is restored under the pushing action of the return spring 120, and at the moment, the valve core 130 receives opposite forces in the axial direction of the shaft body 131, namely the pushing force of the spring and the pushing force of the first sealing ring 140, and if liquid flows into the drainage channel 115 in the reverse direction, the pushing force between the valve core 130 and the first sealing ring 140 is larger under the impact of the liquid, and the sealing effect is better, so that the check is realized.

When the check valve 100 in the utility model is used for water supply, the shaft body 131 of the valve core 130 slides in the first mounting tube 111, the matching structure of the shaft body 131 and the first mounting tube 111 is stable, when the flow rate of liquid in the check valve 100 is larger, the compression amount of the return spring 120 is larger, the distance between the stop body 132 and the first mounting tube 111 is closer, the first mounting tube 111 can form a more stable support for the valve core 130, and the valve core 130 is not easy to vibrate, so that the vibration abrasion of the valve core 130 and the valve seat 110 is avoided.

Referring to fig. 5 to 7, in some embodiments of the present utility model, the check valve 100 further includes a mounting ring 150, a clamping protrusion 113 is disposed on an end surface of the second mounting tube 112 facing one end of the mounting ring 150, a clamping groove 141 is correspondingly disposed on the first sealing ring 140, the clamping protrusion 113 is clamped into the clamping groove 141, the mounting ring 150 is fixed on one end of the second mounting tube 112 and abuts against the first sealing ring 140, and a groove wall of the clamping groove 141 is disposed between an inner wall of the second mounting tube 112 and a periphery of the stop body 132.

The first sealing ring 140 is clamped and fixed between the second mounting tube 112 and the mounting ring 150, so that the tightness between the second mounting tube 112 and the first sealing ring 140 and between the mounting ring 150 and the first sealing ring 140 is ensured; in addition, the clamping convex 113 is clamped in the clamping groove 141 to limit the radial relative movement of the first sealing ring 140 and the second mounting tube 112, so that the structural stability is better; in addition, the groove wall of the clamping groove 141 of the first sealing ring 140 is arranged between the inner wall of the second mounting tube 112 and the periphery of the stopping body 132, and when the stopping body 132 abuts against the first sealing ring 140, the groove wall of the clamping groove 141 of the first sealing ring 140 is clamped by the stopping body 132 and the inner wall of the second mounting tube 112, so that the non-return effect is better.

The mounting ring 150 is fixed on the second mounting tube 112 in various manners, for example, threads are arranged on the outer periphery of one end, close to the mounting ring 150, of the second mounting tube 112, threads are correspondingly arranged on the inner periphery of the mounting ring 150, and the two threads are connected; in some embodiments of the present utility model, the outer circumference of the end of the second mounting tube 112 near the mounting ring 150 is provided with a mounting protrusion 116, and the inner circumference of the mounting ring 150 is correspondingly provided with a mounting groove 152, and the mounting protrusion 116 is mounted in the mounting groove 152, so that the assembly is convenient; there are many ways in which the mounting ring 150 may be secured to the second mounting tube 112, and this is not shown.

Considering that when the covering portion of the first installation tube 111 and the shaft body 131 is smaller, the supporting stability of the first installation tube 111 to the shaft body 131 is poor, and when the covering portion of the first installation tube 111 and the shaft body 131 is larger, the first installation tube 111 can limit the moving range of the valve core 130, and influence the water smoothness of the check valve 100, in some embodiments of the present utility model, in the closed state of the check valve 100, the ratio of the axial length of the first installation tube 111 to the length of the shaft body 131 is 1/3-2/3. The ratio can be 1/3, 1/2, 2/3, etc., so that the water smoothness of the check valve 100 and the stability of the valve core 130 can be considered, and the problems can be avoided.

When the check valve 100 is positively connected with water, the water flow will impact the connection structure between the first mounting tube 111 and the second mounting tube 112, and the connection structure may be damaged when the transient impact force is large, so in some embodiments of the present utility model, a plurality of connection ribs 114 are arranged on the inner wall of the second mounting tube 112 at intervals, the connection ribs 114 are connected with the outer wall of the first mounting tube 111, and one end of the return spring 120 away from the stop body 132 abuts against the connection ribs 114. So set up, rivers are when passing through drainage channel 115, and are less with the impact surface area of connecting rib 114, and the impact force is less, on the one hand can avoid the structure to be destroyed by the rivers impact, on the other hand, drainage channel 115 cross-sectional area is bigger, makes things convenient for the unblocked discharge of rivers.

In order to further improve the drainage smoothness, in some embodiments of the present utility model, a side of the stop body 132 facing away from the shaft body 131 is provided with an umbrella-shaped diversion slope 1321, and a periphery of the diversion slope 1321 abuts against the first sealing ring 140. Thus, when the check valve 100 is used for water supply, water flows into the gap between the stop piece and the second mounting pipe 112 along the diversion inclined plane 1321, and then is discharged from the drainage channel 115, so that the smoothness is good.

In some embodiments of the present utility model, the inner side of the mounting ring 150 remote from the port at one end of the second mounting tube 112 is provided with an arcuate surface. So set up, the water that flows in the forward direction and flows in check valve 100 flows down along the arcwall face, and the impact force of rivers to the terminal surface of collar 150 is less, can avoid collar 150 to receive the rivers impact and lead to loosening with the pipeline that links to each other.

Considering that the interval between the end of the return spring 120, which is close to the stop body 132, and the shaft body 131 is larger, so that the first installation tube 111 stretches in, but offset of the end of the return spring 120, which is close to the stop body 132, easily occurs, so that the return spring 120 is pressed between the stop body 132 and the end face of the first installation tube 111 when the valve core 130 is pressed, damage deformation is caused to the return spring 120, radial acting force is formed on the valve core 130 by the return spring 120, friction force between one side of the valve core 130 and the first installation tube 111 is larger when the valve core 130 axially slides, abrasion and abnormal noise are caused, offset of the stop part is also possibly caused, and a gap is generated between the stop part and the first sealing ring 140, so that tightness is affected.

To solve the above problem, in some embodiments of the present utility model, an annular groove 1322 is concavely formed on a surface of the stopper 132 facing the shaft 131, and one end of the return spring 120 abuts against a bottom wall of the annular groove 1322. So set up, return spring 120 one end is spacing in ring channel 1322, has effectively avoided return spring 120 one end offset problem.

In some embodiments of the present utility model, the check valve 100 further includes a second sealing ring 160, and the outer circumference of the mounting ring 150 is further concavely provided with a limiting ring groove, and the second sealing ring 160 is clamped in the limiting ring groove. Thus, the second seal ring 160 can have a sealing effect when the mounting ring 150 is in butt joint with other pipe joints, and water is prevented from leaking from the two joints.

The utility model also provides a flushing assembly 1000, which comprises a liquid storage tank 200, a water pump 300, a switching valve 400, an upper flushing pipe 510, a main flushing pipe 520 and a check valve 100; a liquid storage cavity 210 is arranged in the liquid storage tank 200; the water pump 300 is positioned at the outer side of the liquid storage tank 200 and is close to the bottom wall of the liquid storage tank 200, and the water pump 300 is communicated with the bottom of the liquid storage cavity 210; the switching valve 400 is provided with a water inlet pipe joint 410, an upper flushing pipe joint 420 and a main flushing pipe joint 430, wherein the water inlet pipe joint 410 is communicated with the water suction pump 300, the upper flushing pipe joint 420 is communicated with the upper flushing pipe 510, and the main flushing pipe joint 430 is communicated with the main flushing pipe 520; the check valve 100 is installed at the main wash pipe joint 430 to prevent the backflow of sewage from the main wash pipe 520 to the switching valve 400.

When the flushing assembly 1000 works, the water pump 300 is started, pumps water from the liquid storage tank 200, pressurizes and conveys the water to the switching valve 400, and finally ejects the water from the upper flushing pipe 510 and the main flushing pipe 520, and the check valve 100 is arranged at the main flushing pipe joint 430, so that the problem that sewage flows back into the switching valve 400 from the main flushing pipe 520 due to liquid backflow in a pipeline after the water pump 300 stops working can be avoided.

The water pump 300 may be a vane pump or a centrifugal pump, and in some embodiments of the present utility model, the water pump 300 is set as a speed-adjustable water pump, the speed-adjustable water pump can adjust the water outlet speed, and the speed-adjustable water pump is matched with the switching valve 400 for use, when the upper wash pipe joint 420 of the switching valve 400 is opened, the speed-adjustable water pump operates at low power, performs a ring washing function, and saves energy and reduces noise; when the main flush pipe joint 430 of the switching valve 400 is opened, the speed water pump operates at high power, achieving a high performance flush effect.

Referring to fig. 8 and 9, considering that after flushing, the water pump 300 stops working, and negative pressure is easily formed in the pipeline, so that water in the tank 200 is sucked out, causing a problem of "water theft", the flushing assembly 1000 further includes a vacuum breaker 700, and the vacuum breaker 700 is disposed at the top of the tank 200 and is connected between the water pump 300 and the water inlet pipe joint 410 in some embodiments of the present utility model. Thus, after the water pump 300 stops working, the vacuum breaker 700 sucks air, keeps the air pressure balance inside and outside the pipeline, effectively avoids the problems, and simultaneously can avoid the dirty water in the toilet 2000 from flowing back from the nozzle pipeline.

In some embodiments of the present utility model, vacuum breaker 700 includes a housing 710, a water stop pad 730, and a push rod 740; the bottom of the shell 710 is provided with a water inlet 714 and a water outlet 715, the push rod 740 is slidably mounted in the water inlet 714, the water stop pad 730 is fixed at the top end of the push rod 740, the top of the shell 710 is provided with a vent 712 corresponding to the push rod 740, the water inlet 714 is communicated with the water outlet of the water suction pump 300, the water outlet 715 is communicated with the water inlet, when the water suction pump 300 works, water is pressurized and conveyed to the vacuum breaker 700, the push rod 740 is jacked up, the water stop pad 730 abuts against the vent 712 to realize sealing, water flows out along the water outlet 715, after the water suction pump 300 stops working, the push rod 740 naturally falls under the action of gravity, and the vent 712 is opened, so that the internal and external air pressures of the vacuum breaker 700 are balanced.

For convenience of assembly, in some embodiments of the present utility model, the housing 710 includes a sealing gasket 720, an upper housing 711 and a lower housing 713 fixed by screw members, a water inlet port 714 and a water outlet port 715 are provided at the lower housing 713, and a vent 712 is provided at the upper housing 711 corresponding to the water inlet port 714; thus, when assembling the vacuum breaker 700, the push rod 740 may be first inserted into the water inlet 714 from above, and then the upper case 711 may be covered and fixed.

Referring to fig. 10 and 11, in order to facilitate the installation of the water pump 300, in some embodiments of the present utility model, the flushing assembly 1000 further includes a bracket 600, a mounting table 220 is formed on one side of the tank 200, a limiting chute 221 is disposed on a bottom surface of the mounting table 220, a limiting rib 610 is disposed on a top of the bracket 600, the limiting rib 610 is slidably engaged in the limiting chute 221, and the water pump 300 is installed at a bottom end of the bracket 600. When the water pump 300 is installed on the liquid storage tank 200, the limit rib plate 610 at the top of the bracket 600 is correspondingly inserted into the limit sliding groove 221 in a sliding manner, so that the installation is convenient, the structure is firm, and the bracket 600 can be used for bearing other components, so that the spatial distribution of the components is convenient.

In some embodiments of the present utility model, the flushing assembly 1000 further includes a cylindrical filter 810 and a water pipe 820, the cylindrical filter 810 is disposed at the bottom of the liquid storage cavity 210, one end of the cylindrical filter 810 is fastened to one end of the water pipe 820, and the other end of the water pipe 820 is communicated with the water pumping end of the water pump 300. By the arrangement, the cylindrical filter screen 810 has larger filter screen area and high filter efficiency, meets the water pumping speed of the water pump 300, and is not easy to block; moreover, the cylindrical filter screen 810 and the water delivery pipe 820 are fixed by adopting a turnbuckle, so that the assembly is convenient, the structure is firm, and the loosening of the cylindrical filter screen 810 caused by the impact of water flow in the liquid storage tank 200 on the cylindrical filter screen 810 in the working process of the water pump 300 is avoided.

In some embodiments of the present utility model, the flush assembly 1000 further includes a water inlet valve 230, the water inlet valve 230 being mounted to the top of the chamber wall of the reservoir 210, the water inlet valve 230 being adapted to communicate with an external water line to maintain the maximum level of water within the reservoir 210 at a set level at all times.

In some embodiments of the present utility model, the switching valve 400 is communicated with each component by adopting the flexible communicating pipe 920, so that the pipeline layout and the calibration are convenient, and the flexible communicating pipe 920 is connected with each joint of the switching valve 400 in various manners; in some embodiments of the present utility model, the flushing assembly 1000 further includes two pressing plates 910 and a flexible communicating pipe 920, the water inlet pipe joint 410, the upper flushing pipe joint 420 and the main flushing pipe joint 430 are all connected with the flexible communicating pipe 920, the two pressing plates 910 are fastened by screw connectors and sleeved and pressed at the connection position of the flexible communicating pipe 920 and at least one of the three, and one of the two pressing plates 910 is fixed to the liquid storage tank 200. So set up, when assembling the flexible communicating tube 920, facilitate inserting flexible communicating tube 920 and tube coupling of the switching valve 400 to counterpoint, compress and fix flexible communicating tube 920 to tube coupling through the clamp plate 910, not merely easy to assemble, and the sealing effect is good; the surface of the pressing plate 910 facing the flexible communicating tube 920 is arc-shaped to match the shape of the pipeline, and the pressing effect is good.

Referring to fig. 12 and 13 in combination, the present utility model further provides a toilet 2000, which includes a housing 1100 and a flushing assembly 1000; the housing 1100 is provided with an assembly cavity 1110, a washer outlet 1111 and a main flush outlet 1112, the flush assembly 1000 being assembled within the assembly cavity 1110, the upper flush tube 510 communicating with the washer outlet 1111, the main flush tube 520 communicating with the main flush outlet 1112.

When the toilet 2000 in the utility model flushes water, the water pump 300 works to pump out the water in the liquid storage tank 200 and convey the water to the switching valve 400 under pressure, the switching valve 400 discharges the water along the upper flushing pipe 510 joint 420 and the main flushing pipe 520 joint 430, the two flushing modes are combined, the flushing cleanliness is high, and water is saved; in addition, since the main flushing pipe 520 joint 430 is provided with the check valve 100, after flushing is finished, the check valve 100 can effectively prevent dirty water from flowing back into the switching valve 400 from the main flushing pipe 520, so that the water in the flushing assembly 1000 is not polluted by the dirty water, and in addition, after the water pump 300 is stopped, the check valve 100 cannot be jacked up due to small water pressure in the switching valve 400, a certain amount of water is reserved, and the adverse phenomena that blasting noise is generated or bubbles exist in the main flushing pipe 520 during the next flushing are avoided.

Because the toilet 2000 adopts all the technical solutions of all the embodiments, at least the technical solutions of the embodiments have all the beneficial effects brought by the technical solutions of the embodiments, and are not described in detail herein.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (11)

1. A non-return valve for use in a flush assembly of a toilet, the non-return valve comprising:

the valve seat comprises a first installation tube and a second installation tube which are sleeved with each other, the outer wall of the first installation tube is connected with the inner wall of the second installation tube, and a drainage channel is formed between the first installation tube and the second installation tube;

one end of the return spring is sleeved outside the first mounting pipe and abuts against the inner wall of the second mounting pipe;

the valve core comprises a shaft body and a stop body, one end of the shaft body penetrates through the first mounting tube, the other end of the shaft body penetrates through the reset spring to be connected with the stop body, the other end of the reset spring is propped against the stop body, and the periphery of the stop body is arranged at intervals with the inner wall surface of the second mounting tube; the method comprises the steps of,

and the first sealing ring is arranged between the inner wall of the second mounting tube and the periphery of the stop body.

2. The non-return valve according to claim 1, further comprising a mounting ring, wherein a clamping protrusion is provided on an end surface of the second mounting tube facing one end of the mounting ring, the first sealing ring is correspondingly provided with a clamping groove, the clamping protrusion is clamped into the clamping groove, the mounting ring is fixed to one end of the second mounting tube and abuts against the first sealing ring, and a groove wall of the clamping groove is arranged between an inner wall of the second mounting tube and a periphery of the stopper body.

3. The non-return valve according to claim 1, wherein the ratio of the axial length of said first mounting tube to the axial length is 1/3 to 2/3.

4. The non-return valve according to claim 1, wherein a plurality of connecting ribs are arranged on the inner wall of the second mounting tube in a protruding mode at intervals, the connecting ribs are connected with the outer wall of the first mounting tube, and one end, away from the stop body, of the return spring abuts against the connecting ribs.

5. The non-return valve according to claim 1, wherein a side of the stop body facing away from the shaft body is provided as an umbrella-shaped flow guiding slope, and the periphery of the flow guiding slope abuts against the first sealing ring.

6. The non-return valve according to claim 1, wherein a surface of the stopper body facing the shaft body is concavely provided with an annular groove, and one end of the return spring abuts against a bottom wall of the annular groove.

7. A flush assembly comprising a tank, a pump, a switch valve, an upper flush tube, a main flush tube, and a non-return valve according to any one of claims 1 to 6; wherein,

a liquid storage cavity is arranged in the liquid storage tank;

the water suction pump is positioned at the outer side of the liquid storage tank and is close to the bottom wall of the liquid storage tank, and the water suction pump is communicated with the bottom of the liquid storage cavity;

the switching valve is provided with a water inlet pipe joint, an upper flushing pipe joint and a main flushing pipe joint, the water inlet pipe joint is communicated with the water suction pump, the upper flushing pipe joint is communicated with the upper flushing pipe, and the main flushing pipe joint is communicated with the main flushing pipe;

the check valve is installed at the main wash pipe joint to prevent sewage from flowing back from the main wash pipe to the switching valve.

8. The flush assembly of claim 7, further comprising a bracket, wherein a mounting table is formed on one side of the liquid storage tank, a limiting chute is formed on the bottom surface of the mounting table, a limiting rib plate is arranged on the top of the bracket, the limiting rib plate is slidably matched in the limiting chute, and the water pump is mounted on the bottom end of the bracket.

9. The flush assembly of claim 7 further comprising a vacuum breaker disposed at a top of the tank, the vacuum breaker being in communication between the suction pump and the inlet fitting.

10. The flush assembly of claim 7, further comprising a cylindrical filter screen and a water delivery tube, wherein the cylindrical filter screen is disposed at the bottom of the liquid storage cavity, one end of the cylindrical filter screen is screwed and fixed with one end of the water delivery tube, and the other end of the water delivery tube is communicated with a water pumping end of the water pump.

11. A toilet comprising a housing and a flush assembly as claimed in any one of claims 7 to 10; the shell is provided with an assembly cavity, a washing ring water outlet and a main flushing water outlet, the flushing assembly is assembled in the assembly cavity, the upper flushing pipe is communicated with the washing ring water outlet, and the main flushing pipe is communicated with the main flushing water outlet.