CN221120948U - Flushing valve and water using device - Google Patents

Abstract

The utility model relates to the field of water valves, and discloses a flushing valve and a water using device. The flushing valve comprises a valve body, a valve core and a push rod, wherein the valve core is arranged in a water passing cavity of the valve body, the water inlet and the water outlet are disconnected when the valve core is positioned at a first position, and the water inlet and the water outlet are communicated when the valve core is positioned at a second position; the ejector rod is arranged in the valve body in a penetrating way, one end of the ejector rod is positioned in the water passing cavity, the other end of the ejector rod is positioned outside the valve body, and the ejector rod can move relative to the valve body until the ejector rod is abutted with the valve core and drives the valve core to move to a second position; the inner chamber that extends along length direction is limited to the ejector pin inside, and first end is provided with the first gas pocket of intercommunication inner chamber, and the second end is provided with the second gas pocket of intercommunication inner chamber, is provided with one-way separation subassembly in the inner chamber, and when water supply pipe's pressure was less than the pressure of external environment, one-way separation subassembly opened the inner chamber so that first gas pocket and second gas pocket intercommunication. The flushing valve can realize an anti-siphon effect on the premise of not influencing water outlet of the water supply pipeline.

Description

Flushing valve and water using device

Technical Field

The utility model relates to the field of water valves, in particular to a flushing valve and a water using device.

Background

The flushing valve is a product used on the water supply pipeline of the squatting pan, is normally arranged at the water outlet end of the water supply pipeline, is loosened after a user steps on the pedal, and realizes the function of automatic closing after flushing under the action of a time-delay valve core in the inner cavity of the flushing valve. When the water supply pipeline is cut off or negative pressure occurs, the valve core can be pushed to be opened under the action of air pressure due to the unbalance of air pressure on two sides of the valve core, and the air pressure in the flushing valve is lower than the air pressure of the external environment at the moment, so that sewage in the sanitary appliance is sucked back to the flushing valve.

In the prior art, an anti-siphon device is arranged between a water outlet of a water supply pipeline and a water inlet of a flushing valve, and when a baffle plate of the siphon device can be opened unidirectionally towards the direction of the flushing valve. Therefore, when the flushing valve works, the baffle is opened under the impact of water flow, so that flushing is realized. When the water supply pipeline is cut off or negative pressure occurs, the flushing valve is closed, and when water does not enter the pipeline, the baffle is reset under the action of the spring to close the water outlet end of the water supply pipeline. However, when the water pressure in the water supply pipeline is insufficient, the baffle cannot be opened, and the baffle is arranged at the water outlet end of the water supply pipeline to influence the water outlet flow.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the flushing valve which can realize the anti-siphon effect on the premise of not influencing the water outlet of the water supply pipeline.

The utility model also provides a water using device with the flushing valve.

A flush valve according to an embodiment of the first aspect of the present utility model includes:

A valve body defining a water passage chamber, a water inlet and a water outlet, the water inlet being in communication with the water supply conduit;

The valve core is arranged in the water passing cavity, the water inlet and the water outlet are disconnected when the valve core is positioned at a first position, and the water inlet and the water outlet are communicated when the valve core is positioned at a second position;

The ejector rod penetrates through the valve body, one end of the ejector rod is located in the water passing cavity, the other end of the ejector rod is located outside the valve body, and the ejector rod can move relative to the valve body until the ejector rod abuts against the valve core and drives the valve core to move to the second position;

Wherein the ejector rod is set to be a first end at one end of the water passing cavity, the ejector rod is set to be a second end at one end of the ejector rod outside the valve body, an inner cavity extending along the length direction is defined inside the ejector rod, the first end is provided with a first air hole communicated with the inner cavity, the second end is provided with a second air hole communicated with the inner cavity, the inner cavity is internally provided with a one-way blocking component which is in a communicating state and a closing state, and when the pressure of the water supply pipeline is not less than the pressure of the external environment, the one-way blocking component is in the closing state so as to disconnect the first air hole and the second air hole; when the pressure of the water supply pipe is less than the pressure of the external environment, the one-way blocking assembly is in the communication state so that the first air hole and the second air hole are communicated.

The flushing valve provided by the embodiment of the utility model has at least the following beneficial effects:

According to the application, the one-way blocking component is arranged in the ejector rod, so that blocking of water flow moving from the first end to the second end of the ejector rod is realized, smooth air flow moving from the second end to the first end of the ejector rod is realized, normal operation of the flushing valve can be ensured when the water pressure of the water supply pipeline is normal, water in the water passing cavity cannot escape through the first air hole and the second air hole, and when the water supply pipeline has negative pressure, the flushing valve can adjust and balance the pressure in the water passing cavity through the first air hole and the second air hole of the ejector rod, so that siphon phenomenon of the water passing cavity and the water supply pipeline is avoided. In addition, the ejector rod is improved, so that a good anti-siphon effect is realized on the premise of not additionally adding parts in the water passing cavity, and the water outlet of the water supply pipeline is not influenced.

According to some embodiments of the utility model, the unidirectional barrier assembly comprises a seal comprising a rim wing and a main body, one end of the rim wing being connected to the main body and the other end extending in the direction of the first end, and the spacing between the rim wing and the main body increasing gradually;

Wherein the flange is capable of elastic deformation to switch the unidirectional barrier assembly to the connected state or the closed state.

According to some embodiments of the utility model, the other end of the flange abuts the inner wall of the inner cavity.

According to some embodiments of the utility model, the direction from the first end to the second end is set as a first direction, the edge wing comprises a first ring segment and a second ring segment which are sequentially connected along the first direction, the second ring segment is connected with the main body part, and the thickness of the first ring segment is smaller than that of the second ring segment.

According to some embodiments of the utility model, a stress groove is formed at the joint of the second ring segment and the main body part, the stress groove is formed on the end face of the second ring segment facing the first end, and the groove bottom of the stress groove is arc-shaped.

According to some embodiments of the present utility model, the direction from the first end to the second end is set as a first direction, the inner cavity comprises a first cavity section and a second cavity section which are sequentially connected along the first direction, the inner diameter of the second cavity section is gradually reduced, the unidirectional blocking assembly further comprises a mounting piece and a sliding seat, the mounting piece is fixed in the inner cavity, the sliding seat is sleeved on the mounting piece and can move relative to the mounting piece, and the main body part of the sealing piece is connected with the sliding seat;

The sealing piece can drive the sliding seat to move along the first direction under the action of water flow impact force until the edge wing is abutted with the cavity wall of the second cavity section.

According to some embodiments of the utility model, the unidirectional blocking assembly further comprises an elastic member, one end of the elastic member is fixed, the other end of the elastic member is in abutting contact with the sliding seat, when the sliding seat moves along the first direction, the elastic member is compressively deformed, and when the water flow impact force is relieved, the elastic member is restored through elastic deformation and the sealing member is located in the first cavity section.

According to some embodiments of the utility model, the one-way blocking assembly is a one-way valve, the one-way valve is in one-way conduction along the direction from the second end to the first end, and the one-way valve comprises a blocking member which can move in the inner cavity so as to switch the one-way blocking assembly to the communication state or the closing state.

According to some embodiments of the utility model, the check valve comprises a second elastic member, the blocking member seals the inner cavity under the action of the elastic member, so that the inner cavity is in a normally closed state, and when the pressure of the water supply pipeline is smaller than that of the external environment, the blocking member moves towards the first end under the action of pressure difference, so that the first air hole and the second air hole are communicated.

According to a second aspect of the present utility model, a water using apparatus includes:

a water supply pipe;

An apparatus main body provided with a drain port;

The flush valve of any one of the preceding embodiments, a water inlet of the flush valve in communication with the water supply conduit, a water outlet of the flush valve in communication with a water outlet of the device body.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic diagram of a flush valve according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a flush valve according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a mandrel according to an embodiment of the present utility model;

FIG. 4 is an exploded view of a lift pin according to an embodiment of the present utility model;

FIG. 5 is a schematic cross-sectional view of a lift pin according to an embodiment of the present utility model;

FIG. 6 is an enlarged schematic view of area A of FIG. 5;

FIG. 7 is a schematic view of one implementation of a unidirectional barrier assembly of an embodiment of the utility model;

Fig. 8 is a schematic view of another implementation of a unidirectional barrier assembly of an embodiment of the utility model.

Reference numerals:

A valve body 100; a water passing chamber 110; a first subchamber 111; a second subchamber 112; a partition 113; a first through hole 114; a water inlet 120; a water outlet 130; a pedal 150;

a valve core 200; a third elastic member 210;

Ejector pins 300; a first end 301; a second end 302; a first air hole 310; a second air hole 320; a lumen 330; a first cavity section 331; a second chamber section 332;

A one-way barrier assembly 400; a seal 410; a flange 411; a first ring segment 4111; a second ring segment 4112; stress grooves 4113; a main body portion 412; a first elastic member 420; a sliding seat 430; a blocking member 440; a second elastic member 450; a mount 460; a shaft portion 461; a support 462; a mount 463;

A water supply pipe 500.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

In the description of the present utility model, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In a first aspect of the present application, there is provided a flush valve including a valve body 100, a valve core 200 and a stem 300, the valve body 100 defining a water passing chamber 110, a water inlet 120 and a water outlet 130, the water inlet 120 and the water outlet 130 being respectively located at upper and lower ends of the water passing chamber 110 as shown in fig. 2, and the water inlet 120 and the water outlet 130 being in communication with the water passing chamber 110. The water inlet 120 is communicated with the water supply pipeline 500, and the water outlet 130 is communicated with the main body of the equipment such as a toilet, a squatting pan and the like. The valve core 200 is arranged in the water passing cavity 110 in a penetrating way, the valve core 200 has a first position and a second position, and as shown in fig. 2, when the valve core 200 is in the first position, the water inlet 120 and the water outlet 130 are disconnected; the inlet 120 and outlet 130 communicate (not shown) when the cartridge 200 is in the second position.

Specifically, as shown in fig. 2, the water passing chamber 110 is defined with a first sub-chamber 111 and a second sub-chamber 112, the first sub-chamber 111 and the second sub-chamber 112 are separated by a partition 113, and a first through hole 114 is provided in the partition 113, and the first through hole 114 communicates with the first sub-chamber 111 and the second sub-chamber 112. The first subchamber 111 communicates with the water inlet 120 and the second subchamber 112 communicates with the water outlet 130. The valve core 200 is disposed in the first subchamber 111, one end of the valve core 200 is provided with a third elastic member 210, and when the valve core 200 is in the first position, the valve core 200 abuts against the partition 113 and closes the first through hole 114 under the elastic force of the third elastic member 210, so that the first subchamber 111 and the second subchamber 112 are disconnected from each other. Thus, the water flow in the first subchamber 111 cannot pass through the second subchamber 112 and out the water outlet 130. It should be noted that, the valve core 200 is in the first position for a long time without external force, so that the flush valve is kept in a state of closing the water outlet.

The valve body 100 is provided with a second through hole communicated with the water passing cavity 110, and the ejector rod 300 is arranged through the second through hole and is in sealing connection with the second through hole so as to prevent water flow from escaping through the second through hole. For convenience of the following description, as shown in fig. 2 and 3, both ends of the stem 300 are respectively set as a first end 301 and a second end 302, wherein the first end 301 is located in the water passing chamber 110, and the second end 302 is located outside the valve body 100. It should be noted that, the ejector 300 is disposed on an extension line of the moving direction of the valve core 200, and the ejector 300 is movably connected to the valve body 100 and can move relative to the valve body 100. When it is necessary to open the spool 200, the jack 300 is driven to move by an external force, for example, by pressing the jack 300 to move the jack 300 in a direction approaching the spool 200 until abutting against the spool 200 and driving the spool 200 to move until the spool 200 moves from the first position to the second position. Alternatively, the pedal 150 shown in fig. 2 may be provided, and the pedal 150 may be depressed to move the plunger 300 in the direction of the valve body 200, thereby moving the valve body 200 to the second position, and switching the flush valve to the water discharge state. After the external force is released, the valve core 200 gradually resets and closes the first through hole 114 under the action of the third elastic member 210, so as to restore the flush valve to a state of closing the water outlet.

When the water supply pipe 500 is disconnected from water, and is under negative pressure, the first subchamber 111 communicating with the water supply pipe 500 is also under negative pressure, and the second subchamber 112 communicating with the external environment is under normal air pressure, that is, the pressure in the first subchamber 111 is smaller than the pressure in the second subchamber 112. Under the action of air pressure, the valve core 200 moves from the first position to the second position, at this time, the water inlet 120 and the water outlet 130 of the water passing cavity 110 are communicated, and under the action of negative pressure, the water supply pipeline 500 performs siphon action because no water flow exists in the water supply pipeline 500 or the water pressure is small, and water flow in the external environment flows back to the water supply pipeline 500 through the water outlet 130 and the water inlet 120, so that the water source in the water supply pipeline 500 is polluted.

To solve the above problems, in the embodiment of the present application, an anti-siphon structure is integrated inside the ejector 300. Specifically, as shown in fig. 2 to 6, the ejector 300 defines an inner cavity 330 extending along a length direction thereof, and the first end 301 of the ejector 300 is further provided with a first air hole 310 communicating with the inner cavity 330, and the second end 302 of the ejector 300 is provided with a second air hole 320 communicating with the inner cavity 330. The inner cavity 330 is provided with a one-way blocking assembly 400, the one-way blocking assembly 400 has a communicating state and a closing state, when the water pressure in the water supply pipe 500 is normal, that is, when the pressure of the water supply pipe 500 is not less than the pressure of the external environment, the one-way blocking assembly 400 is in the closing state, the one-way blocking assembly 400 closes the inner cavity 330 to disconnect the first air hole 310 from the second air hole 320, so that when the ejector rod 300 drives the valve core 200 to move from the first position to the second position, the water inlet 120 and the water outlet 130 are communicated to fill the water passing cavity 110, and at the moment, the first air hole 310 at the first end 301 of the ejector rod 300 also can be filled with water, but due to the existence of the one-way blocking assembly 400, the water flow is blocked in the inner cavity 330 and cannot escape from the second air hole 320.

When the water supply pipe 500 is in a water cut-off state, a negative pressure state, or the like, that is, when the pressure in the water supply pipe 500 is less than the pressure of the external environment, the unidirectional blocking assembly 400 releases the closed state of the inner cavity 330, and at this time, the unidirectional blocking assembly 400 is in a communicating state, in which the first air hole 310 and the second air hole 320 are communicated, and air in the external environment can sequentially pass through the second air hole 320, the inner cavity 330 and the first air hole 310 to enter the water passing cavity 110, so as to realize the air pressure balance in the water passing cavity 110 and the external environment, thereby avoiding the occurrence of a siphon phenomenon in the water passing cavity 110 and reducing the possibility that sewage flows back into the water passing cavity 110 and the water supply pipe 500.

Based on the above, the present application realizes the blocking of the movement of the water flow from the first end 301 to the second end 302 of the push rod 300 by providing the one-way blocking assembly 400 in the push rod 300, and the unblocking of the movement of the air flow from the second end 302 to the first end 301 of the push rod 300, so that the normal operation of the flush valve can be ensured when the water pressure of the water supply pipe 500 is normal, and the water in the water passing chamber 110 does not escape through the first air hole 310 and the second air hole 320, and when the water supply pipe 500 has a negative pressure, the flush valve can adjust the pressure in the balanced water passing chamber 110 through the first air hole 310 and the second air hole 320 of the push rod 300, so as to avoid the siphon phenomenon of the water passing chamber 110 and the water supply pipe 500. In addition, the application realizes better anti-siphon effect on the premise of not additionally adding parts in the water passing cavity 110 by improving the ejector rod 300, and does not influence the water outlet of the water supply pipeline 500.

Next, the unidirectional blocking assembly 400 is further described, and for convenience of the following description, the direction from the first end 301 to the second end 302 is set to be the first direction, and the direction from the second end 302 to the first end 301 is set to be the second direction. In the present application, three more detailed embodiments of unidirectional barrier assembly 400 are presented, but it should be noted that embodiments of the present application are not limited to these three embodiments.

In the first embodiment of the unidirectional barrier assembly 400 of the present application, the unidirectional barrier assembly 400 includes a sealing member 410, the sealing member 410 includes a rim 411 and a main body 412, as shown in fig. 4 and 5, the rim 411 has a circular ring shape, an inner ring end thereof is connected to the main body 412, an outer ring end thereof extends toward the first end 301, and a distance between the rim 411 and the main body 412 is gradually increased, so that when the sealing member 410 of the structure is impacted in the first direction, the sealing member 410 is elastically deformed to be further expanded, and a distance between the distal end of the rim 411 and the main body 412 is increased. When the seal 410 is impacted in the second direction, the seal 410 is elastically deformed and closed, and the distance between the distal end of the flange 411 and the main body 412 is reduced. In this embodiment, the state of the unidirectional barrier assembly 400 is switched by elastic deformation of the rim wing 411.

It should be understood that the main body 412 is fixedly disposed in the inner cavity 330 and located on the axis of the inner cavity 330, and the main body 412 may be directly connected to the cavity wall of the inner cavity 330, and may be fixed in the inner cavity 330 by the cavity wall, or may be disposed in the inner cavity 330 by other mounting components.

In this embodiment, the seal 410 is secured within the interior cavity 330 and expands in direction toward the first end 301, and when the valve core 200 of the flush valve is opened, water flows from the first air vent 310 into the interior cavity 330 and impacts the rim 411 of the seal 410. The water flow impinges on the rim 411 to deform the rim 411 to further expand and thereby tighten the connection of the seal 410 to the cavity wall of the cavity 330.

Further, in the initial state where the sealing member 410 is not subjected to the impact force, the outer ring end of the rim 411 of the sealing member 410 extends toward the first end 301 until the tip of the outer ring end abuts against the wall of the inner cavity 330. Therefore, the sealing member 410 makes the inner cavity 330 of the ejector 300 in a long-term closed state, and when water flows in from the first air hole 310, the sealing member 410 can perform a better sealing effect, so as to prevent the water from escaping from the gap between the tail end of the edge wing 411 and the cavity wall of the inner cavity 330. When negative pressure occurs in the water passing cavity 110, air flow enters from the second air hole 320 and presses the edge wing 411 to elastically deform and close, so that the air flow can enter into the water passing cavity 110 from a gap between the tail end of the edge wing 411 and the cavity wall of the inner cavity 330. Or in the initial state that the sealing element 410 is not impacted, the tail ends of the edge wings 411 are kept at a tiny distance from the cavity wall of the inner cavity 330, so that the sealing element 410 enables the inner cavity 330 of the ejector rod 300 to be in a penetrating state for a long time, and the probability of siphoning in the water passing cavity 110 is reduced. When the flush valve is opened, water flows from the first air hole 310 into the inner cavity 330, and the seal 410 elastically deforms to enable the trailing edge 411 to abut against the cavity wall of the inner cavity 330.

Further, the rim wing 411 includes a first ring segment 4111 and a second ring segment 4112 sequentially connected in a first direction. As shown in fig. 6, the inner ring end of the second ring segment 4112 is connected to the main body 412, the outer ring end of the second ring segment 4112 is connected to the inner ring end of the first ring segment 4111, and the other end of the first ring segment 4111 is a free end. Wherein the thickness of the first ring segment 4111 is less than the thickness of the second ring segment 4112. Thus, the first ring segment 4111 is more easily elastically deformed to achieve a rapid response to water flow shock or pressure differential. In addition, since the second ring segment 4112 is thicker than the first ring segment 4111, the second ring segment 4112 can stably support the first ring segment 4111, and the connection between the flange 411 and the main body 412 is unreliable if the flange 411 is too thin, and the elastic deformation is difficult if the flange 411 is too thick, compared to the embodiment with the same thickness of the flange 411. The thickness of the two ring segments is reasonably planned, so that the gradient elastic deformation can be realized when the sealing element 410 is impacted to generate elastic deformation, and the connection of the edge wings 411 is more reliable on the premise that the elastic deformation can be excited.

As shown in fig. 6, a stress groove 4113 is formed at the junction between the second ring segment 4112 and the main body 412, the stress groove 4113 is formed on the end face of the second ring segment 4112 facing the first end 301, and the groove bottom of the stress groove 4113 is arc-shaped. It can be appreciated that when the flange 411 is acted by a force along the first direction or the second direction, the stress at the junction of the second ring segment 4112 and the main body 412 is concentrated, and fatigue damage is easily generated in the long term, so that the junction of the second ring segment 4112 and the main body 412 is torn, thereby causing water leakage of the flushing valve. For this reason, the stress groove 4113 is provided at the junction between the second ring segment 4112 and the main body 412 for arc-shaped switching, so that stress concentration can be avoided and the life of the seal 410 can be prolonged.

Unlike the first embodiment, in which the sealing member 410 is fixedly disposed in the inner cavity 330, the second embodiment of the unidirectional blocking assembly 400 of the present application, in which the sealing member 410 is movably disposed in the inner cavity 330. The seal 410 of the second embodiment has the same structure as the seal 410 of the first embodiment. In the second embodiment, as shown in fig. 3 to 6, the unidirectional blocking assembly 400 further includes a mounting member 460 and a sliding seat 430, wherein the mounting member 460 is fixed in the inner cavity 330, and as shown in fig. 2, 4 and 5, the mounting member 460 includes a shaft portion 461 and three supporting portions 462 disposed at one end of the shaft portion 461, the three supporting portions 462 can be uniformly distributed along the circumferential direction of the shaft portion 461 and extend along the radial direction of the shaft portion 461 so that the supporting portions 462 can abut against the cavity wall of the inner cavity 330 to stabilize the shaft portion 461, and a water gap is defined between each adjacent supporting portions 462. The mounting member 460 further includes a mounting base 463 detachably connected to the shaft portion 461, the mounting base 463 being fixed to the second end 302 of the ejector 300. The other end of the shaft 461 is connected to the mount 463 to fix the mount 460 in the inner cavity 330. The sliding seat 430 is sleeved on the shaft portion 461 of the mounting member 460, the sliding seat 430 can move along the first direction or the second direction relative to the mounting member 460, and the main body portion 412 of the sealing member 410 is fixedly connected with the sliding seat 430, so that the sealing member 410 can move along with the sliding seat 430.

When water enters the inner cavity 330 from the first air hole 310, the water impacts the sealing member 410, so that the sealing member 410 drives the sliding seat 430 to move along the first direction. It should be noted that, in this embodiment, as shown in fig. 6, the inner cavity 330 further includes a first cavity section 331 and a second cavity section 332 sequentially connected along the first direction, where the inner diameter of the second cavity section 332 is gradually reduced, and is in a slope shape. Further, the seal 410 is movable in the first direction until the lip 411 abuts the cavity wall of the second cavity section 332, thereby being limited in further displacement by the second cavity section 332. It will be appreciated that the abutment of the lip 411 with the cavity wall of the second cavity section 332 has a larger contact area, enabling a better sealing effect.

Further, the unidirectional blocking assembly 400 further includes a first elastic member 420, where one end of the first elastic member 420 is fixed, and in the embodiment shown in fig. 2,4 and 5, one end of the first elastic member 420 is connected to the mounting seat 463, and the other end of the first elastic member abuts against the sliding seat 430. When the sliding seat 430 moves in the first direction, the first elastic member 420 is compressively deformed, and when the water flow impact force is released, the first elastic member 420 can be restored by elastic deformation, and the sealing member 410 is positioned in the first cavity section 331. It will be appreciated that the first resilient member 420 acts on the one hand to retain the seal 410 in the first chamber section 331 and on the other hand to cushion the seal 410 against unloading forces when it is impacted in the first direction to avoid the seal 410 impinging on the chamber wall of the second chamber section 332 at a relatively high rate.

It should be noted that, the sealing member 410 is not under elastic force in the initial state, and when a negative pressure condition occurs in the water passing cavity 110, the pressure caused by the negative pressure difference is greater than the elastic deformation limit of the first ring segment 4111, so that the inner cavity 330 is conducted, and because the first ring segment 4111 is thinner, elastic deformation is easier to occur, therefore, the response speed of the unidirectional blocking assembly 400 with the structure is faster, and the inner cavity 330 can be conducted to realize air pressure balance when the negative pressure of the water passing cavity 110 is formed, thereby preventing the occurrence of siphon phenomenon.

In a third embodiment of the one-way barrier assembly 400 of the present application, as shown in fig. 7 and 8, the one-way barrier assembly 400 is a one-way valve that is one-way conductive in a second direction and one-way closed in a first direction. Thus, water cannot pass through the one-way valve in the first direction and air can pass through the one-way valve in the second direction. It should be noted that, unlike the first and second embodiments described above, the closing or opening of the inner cavity 330 is achieved by elastic deformation, and in the third embodiment, the closing or opening of the inner cavity 330 is achieved by movement of the blocking member of the check valve, that is, the blocking member can move in the inner cavity 330 to switch the unidirectional barrier assembly 400 to the communication state or the closed state.

Further, as shown in fig. 7 and 8, two kinds of check valves are schematically shown. The check valve comprises a blocking member 440 and a second elastic member 450, wherein the blocking member 440 closes the inner cavity 330 under the driving action of the second elastic member 450, so that the inner cavity 330 is in a normally closed state, and the blocking member 440 is in a block shape, a plate shape or the like and can be made of rubber or other materials. In the embodiment shown in fig. 7, the second elastic member 450 is in a stretched state in the current state, and the blocking member 440 is pulled rightward to close the inner cavity 330. If a negative pressure occurs in the water passing cavity 110, and the leftward pressure on the blocking member 440 is greater than the rightward pulling force, the pressure drives the second elastic member 450 to further elastically deform, so that the second elastic member 450 further extends, and the blocking member 440 moves toward the first end 301 to open the inner cavity 330, and the air flow penetrates into the water passing cavity 110 to achieve air pressure balance.

In the embodiment shown in fig. 8, the left end of the second elastic member 450 is fixed in the inner cavity 330, and the right end abuts against the blocking member 440, and at this time, the second elastic member 450 is in a compressed state, and at this time, the blocking member 440 is pressed rightward to close the inner cavity 330. If a negative pressure occurs in the water passing cavity 110, and the leftward pressure on the blocking member 440 is greater than the rightward pressure, the pressure generated by the air pressure drives the second elastic member 450 to further elastically deform, so that the second elastic member 450 is further compressed, and the blocking member 440 moves toward the first end 301 to open the inner cavity 330, and the air flow penetrates into the water passing cavity 110 to achieve air pressure balance.

It should be noted that, for the case where the unidirectional blocking assembly 400 is a unidirectional valve, the second elastic member 450 has a better sealing effect on the water flow due to a certain elastic force applied to the blocking member 440 in the initial state.

An embodiment of the second aspect of the present application proposes a water using apparatus comprising a water supply pipe 500, an apparatus body provided with a water discharge port, and a flush valve as mentioned in any of the above embodiments, a water inlet 120 of the flush valve being in communication with the water supply pipe 500, a water outlet 130 of the flush valve being in communication with the water discharge port of the apparatus body, by employing the flush valve of the present application, it is possible to avoid the occurrence of a condition in which sewage at the water discharge port of the apparatus body is back-contaminated with a water source.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model. Furthermore, embodiments of the utility model and features of the embodiments may be combined with each other without conflict.

Claims (10)

1. A flush valve connected to a water supply line, comprising:

A valve body defining a water passage chamber, a water inlet and a water outlet, the water inlet being in communication with the water supply conduit;

The valve core is arranged in the water passing cavity, the water inlet and the water outlet are disconnected when the valve core is positioned at a first position, and the water inlet and the water outlet are communicated when the valve core is positioned at a second position;

The ejector rod penetrates through the valve body, one end of the ejector rod is located in the water passing cavity, the other end of the ejector rod is located outside the valve body, and the ejector rod can move relative to the valve body until the ejector rod abuts against the valve core and drives the valve core to move to the second position;

Wherein the ejector rod is set to be a first end at one end of the water passing cavity, the ejector rod is set to be a second end at one end of the ejector rod outside the valve body, an inner cavity extending along the length direction is defined inside the ejector rod, the first end is provided with a first air hole communicated with the inner cavity, the second end is provided with a second air hole communicated with the inner cavity, the inner cavity is internally provided with a one-way blocking component which is in a communicating state and a closing state, and when the pressure of the water supply pipeline is not less than the pressure of the external environment, the one-way blocking component is in the closing state so as to disconnect the first air hole and the second air hole; when the pressure of the water supply pipe is less than the pressure of the external environment, the one-way blocking assembly is in the communication state so that the first air hole and the second air hole are communicated.

2. The flush valve of claim 1, wherein the one-way barrier assembly comprises a seal comprising a rim wing and a body portion, one end of the rim wing being connected to the body portion and the other end extending in the direction of the first end, and wherein the spacing between the rim wing and the body portion increases gradually;

Wherein the flange is capable of elastic deformation to switch the unidirectional barrier assembly to the connected state or the closed state.

3. The flush valve of claim 2, wherein the other end of the rim fin abuts an inner wall of the internal cavity.

4. The flush valve of claim 2, wherein the direction from the first end to the second end is set to a first direction, the rim comprises a first ring segment and a second ring segment connected in sequence along the first direction, the second ring segment is connected to the body portion, and wherein the thickness of the first ring segment is less than the thickness of the second ring segment.

5. The flush valve of claim 4, wherein a stress groove is formed in a junction between the second ring segment and the main body, the stress groove being formed in an end face of the second ring segment facing the first end, and a groove bottom of the stress groove being arc-shaped.

6. The flush valve of claim 2, wherein the direction from the first end to the second end is set to be a first direction, the inner cavity comprises a first cavity section and a second cavity section which are sequentially connected along the first direction, the inner diameter of the second cavity section is gradually reduced, the one-way blocking assembly further comprises a mounting piece and a sliding seat, the mounting piece is fixed in the inner cavity, the sliding seat is sleeved on the mounting piece and can move relative to the mounting piece, and the main body part of the sealing piece is connected with the sliding seat;

The sealing piece can drive the sliding seat to move along the first direction under the action of water flow impact force until the edge wing is abutted with the cavity wall of the second cavity section.

7. The flush valve of claim 6, wherein the one-way blocking assembly further comprises a first resilient member having one end secured and the other end abutting the sliding seat, the first resilient member being compressively deformed when the sliding seat is moved in the first direction, the first resilient member being resiliently deformed to return the sealing member to the first chamber section when the water flow impact force is released.

8. The flush valve of claim 1, wherein the one-way blocking assembly is a one-way valve that is one-way conductive in a direction from the second end to the first end, the one-way valve including a blocking member movable within the internal cavity to switch the one-way blocking assembly to the connected state or the closed state.

9. The flush valve of claim 8, wherein the check valve includes a second resilient member, the blocking member closing the internal chamber under the influence of the second resilient member to place the internal chamber in a normally closed state, the blocking member moving in a direction toward the first end under the influence of a pressure differential to place the first vent and the second vent in communication when the pressure of the water supply line is less than the pressure of the external environment.

10. A water-consuming device, comprising:

a water supply pipe;

An apparatus main body provided with a drain port;

A flush valve as claimed in any one of claims 1 to 9, the water inlet of the flush valve being in communication with the water supply conduit and the water outlet of the flush valve being in communication with the water outlet of the apparatus body.