阅读说明：本技术 一种防止虹吸倒流的双水路冲水阀 (Double-water-path flushing valve capable of preventing siphon backflow ) 是由 陈风 于 2021-08-27 设计创作，主要内容包括：本发明公开了一种防止虹吸倒流的双水路冲水阀,包括：具有进水端和出水端的阀体,进水端包括一外管部,以及设置在所述外管部内部的内管部,内管部的管沿高于所述出水端的上沿,内管部上设置有防虹吸阀,防虹吸阀的上方设置有进气组件,防虹吸阀在所述进水端进水时封闭进气组件的底部形成密封通水流道,并在所述进水端产生负压时封闭进水端的管沿并打开进气组件隔断虹吸,通过提高内管部的高度,使内管部管口高度高于出水端进水口上沿的高度,让出水端残留水无法越过内管部流入进水端,又能使防虹吸阀在出水端进水口上沿上方位置通气阻断虹吸,使出水端内的水流来不及越过内管部管口高度回流,杜绝马桶脏水通过出水端虹吸倒流回进水端的现象发生。(The invention discloses a double-water-path flushing valve for preventing siphon backflow, which comprises: the valve body with water inlet end and water outlet end, the water inlet end comprises an outer pipe part and an inner pipe part arranged inside the outer pipe part, the pipe edge of the inner pipe part is higher than the upper edge of the water outlet end, an anti-siphon valve is arranged on the inner pipe part, an air inlet component is arranged above the anti-siphon valve, the anti-siphon valve seals the bottom of the air inlet component when the water inlet end enters water to form a sealed water flow passage, and the pipe edge of the water inlet end is closed and the air inlet component is opened to cut off siphon when the water inlet end generates negative pressure, through the height that improves inner tube portion, make inner tube portion mouth of pipe highly be higher than the height on the play water end water inlet along, let out that water end residual water can't cross inner tube portion inflow end, can make anti-siphon valve again and block the siphon of ventilating along the top position on going out the water end water inlet, make the rivers in the play water end not in time cross inner tube portion mouth of pipe height backward flow, stop the closestool foul water and take place through the phenomenon that goes out water end siphon and flow back to the end of intaking.)

1. The utility model provides a prevent two water circuit flashing valves of siphon refluence which characterized in that includes:

a valve body having a water inlet end (1) and a water outlet end (2), the water inlet end (1) including an outer tube portion (13), and

an inner pipe part (12) arranged inside the outer pipe part (13), wherein the pipe edge of the inner pipe part (12) is higher than the upper edge of the water outlet end (2),

be provided with on inner tube portion (12) anti-siphon valve (3), the top of anti-siphon valve (3) is provided with air intake component (5), anti-siphon valve (3) are in seal when intaking end (1) and intaking the bottom of air intake component (5), and seal when intaking end (1) produces the negative pressure intake end (1) the pipe edge, anti-siphon valve (3) include:

an elastic pressing piece (32), wherein the elastic pressing piece (32) is tightly attached to the pipe edge of the water inlet end (1) under the self-weight or when the water inlet end (1) generates negative pressure, an

And the sealing pressing piece (33) is arranged above the elastic pressing piece (32), and the sealing pressing piece (33) is pressed on the air inlet assembly (5) by the water flow pressure of the water inlet end (1).

2. A dual water path flush valve for preventing siphon backflow according to claim 1, wherein the siphon valve (3) further comprises a valve stem (34) penetrating the elastic pressing member (32) and the closing pressing member (33), and a branch flow head (31) provided at the bottom of the valve stem (34), wherein the valve stem (34) reciprocates in the axial direction of the air intake assembly (5).

3. The dual water path flush valve for preventing siphon backflow according to claim 2, wherein the diverting head (31) has a conical structure with a conical head facing the water inlet direction of the water inlet end (1).

4. A dual water path flush valve for preventing siphon backflow according to claim 1, wherein said water inlet port (1) further comprises a connection portion (11) connected to an external water source, said connection portion (11) being connected to the bottom of said inner pipe portion (12).

5. The dual water path flush valve preventing siphon reverse flow according to claim 4, wherein the inner pipe portion (12) is integrally formed with the connection portion (11), or the inner pipe portion (12) is detachably connected to the connection portion (11).

6. A dual water path flush valve for preventing siphon backflow according to claim 1, wherein a sealing surface (4) is further provided between the siphon valve (3) and the air intake assembly (5), and the sealing surface (4) comprises a sealing gasket (41) closely attached to the air intake assembly (5), and an air intake concave surface (42) provided in the sealing gasket (41) and concave to one side of the air intake assembly (5).

7. The dual-water-path flush valve capable of preventing siphon backflow according to claim 2, wherein the air inlet assembly (5) comprises an air inlet cover (51) connected with the outer pipe part (13), a cavity (52) arranged in the air inlet cover (51), and a joint (53) arranged on one side of the air inlet cover (51), wherein the valve rod (34) is connected to the inner side of the cavity (52) in a guiding manner, and a plurality of air inlets (54) are formed in the air inlet cover (51).

8. The dual-water-path flush valve capable of preventing siphon backflow according to claim 1, further comprising a water outlet assembly (6), wherein the water outlet assembly (6) comprises a water outlet member (64) connected to the water outlet end (2), a water outlet cover (62) arranged on the water outlet member (64), a water stop gasket (63) connected between the water outlet cover (62) and the water outlet member (64), and an electromagnetic valve (61) arranged on the water outlet cover (62), wherein the water stop gasket (63) is used for opening or closing a channel between the water outlet end (2) and the water outlet member (64).

9. The dual-water-path flush valve for preventing siphon backflow as claimed in claim 1, wherein a first baffle (121) is disposed at a position where the outer circumferential surface of the inner pipe portion (12) is flush with the water outlet end (2), and a second baffle (641) is disposed at a position where the water outlet member (64) is flush with the water outlet end (2).

10. A cistern comprising a dual water path flush valve preventing reverse flow of a siphon as claimed in any one of claims 1 to 9, wherein said cistern comprises a water inlet passage communicating with said water inlet port (1).

Technical Field

The invention relates to a flush valve, in particular to a double-water-path flush valve capable of preventing siphon backflow.

Background

The existing flush valve comprises a water inlet pipeline, a water pumping device and a water outlet pipeline, wherein the water inlet pipeline is connected with a public water channel, the water outlet pipeline is connected with a bedpan, when the water inlet level is higher than the water outlet end of the water outlet pipeline, and the water pumping device stops pumping water, the water outlet pipeline can generate a siphoning phenomenon, in order to destroy the siphoning phenomenon, a one-way valve is often additionally arranged on the water outlet pipeline, so that the water can be normally discharged from the water inlet pipeline, and the water can be prevented from flowing back to the water inlet pipeline to pollute a water source.

The one-way valve of the existing flushing valve is a spring one-way valve, and the one-way valve and the air inlet end are in a normally closed state, namely, only when the water inlet pipeline suddenly stops water, the generated negative pressure can suck the spring towards the direction of the water inlet pipeline, the spring one-way valve can seal the water inlet pipeline, so that the water backflow of the water outlet pipeline is avoided, but because the water inlet pipeline does not suddenly generate negative pressure but slowly generates negative pressure when the water is stopped, the spring cannot be sucked down in time when a certain vacuum node exists, so that the water of the water outlet pipeline can flow back to the water inlet pipeline, and the toilet water pollutes the whole public water channel, and the water sanitation is influenced.

In the existing flushing valve, the height difference between the port at the water inlet end and the port at the water outlet end is small, and residual water at the water outlet end easily flows back to the port at the water inlet end even under the condition of no water pressure.

Disclosure of Invention

The invention provides a double-water-path flushing valve capable of preventing siphon backflow, which can effectively solve the problems.

The invention is realized by the following steps:

a dual water circuit flush valve for preventing siphon backflow, comprising:

a valve body having a water inlet end and a water outlet end, the water inlet end including an outer tube portion, and

an inner pipe part arranged in the outer pipe part, wherein the pipe edge of the inner pipe part is higher than the upper edge of the water outlet end,

be provided with anti-siphon valve on the inner tube portion, anti-siphon valve's top is provided with the subassembly of admitting air, anti-siphon valve is in seal when intaking the end and intaking the bottom of subassembly of admitting air, and seal when intaking the end and producing the negative pressure the pipe edge of intaking the end, anti-siphon valve includes:

an elastic pressing member which is tightly attached to a pipe edge of the water inlet end under the self-weight or when the water inlet end generates negative pressure, an

A closed pressing member disposed above the elastic pressing member, the closed pressing member

The water flow pressure of the water inlet end is pressed on the air inlet component.

As a further improvement, the anti-siphon valve further comprises a valve rod penetrating through the elastic pressing piece and the sealing pressing piece, and a flow dividing head arranged at the bottom of the valve rod, wherein the valve rod reciprocates along the axial direction of the air inlet assembly.

As a further improvement, the flow dividing head is a conical structure with a conical head facing the water inlet direction of the water inlet end.

As a further improvement, the water inlet end also comprises a connecting part connected with an external water source, and the connecting part is connected with the bottom of the inner pipe part.

As a further improvement, the inner tube part and the connecting part are integrally formed, or the inner tube part and the connecting part are detachably connected.

As a further improvement, a sealing surface is further arranged between the anti-siphon valve and the air inlet assembly, and the sealing surface comprises a sealing gasket tightly attached to the air inlet assembly and an air inlet concave surface arranged in the sealing gasket and concave to one side of the air inlet assembly.

As a further improvement, the air inlet assembly comprises an air inlet cover connected with the outer pipe part, a cavity arranged in the air inlet cover, and a joint arranged on one side of the air inlet cover, wherein the inner side of the cavity is connected with a valve rod in a guiding manner, and the air inlet cover is provided with a plurality of air inlets.

As a further improvement, the water outlet device further comprises a water outlet assembly, wherein the water outlet assembly comprises a water outlet piece connected with the water outlet end, a water outlet cover arranged on the water outlet piece, a water stop pad connected between the water outlet cover and the water outlet piece, and an electromagnetic valve arranged on the water outlet cover, and the water stop pad is used for opening or closing a channel between the water outlet end and the water outlet piece.

As a further improvement, a first flow deflector is arranged at the position where the outer peripheral surface of the inner pipe part is flush with the water outlet end, and a second flow deflector is arranged at the position where the water outlet part is flush with the water outlet end.

A water tank comprises the double-water-path flushing valve capable of preventing siphon backflow, and the water tank comprises a water inlet channel, and the water inlet channel is communicated with the water inlet end.

The invention has the beneficial effects that:

according to the invention, the height of the inner pipe part is increased to enable the height of the inner pipe part to be higher than the height of the upper edge of the water outlet end, so that the water outlet end cannot go over the height of the inner pipe part to flow back to the water inlet end even if backflow occurs, the phenomenon that water flow at the water outlet end flows back to the water inlet end is avoided, the water inlet end and the water outlet end are separated, and residual water at the water outlet end cannot enter the water inlet end to pollute a water source.

When water does not enter, the anti-siphon valve seals the water inlet end through self weight, so that the anti-siphon valve and the water inlet end are in a normally closed state, the anti-siphon valve and the air inlet assembly are in a normally open state, once the negative pressure is generated at the water inlet end, the anti-siphon valve and the water inlet end are attracted more tightly in the original closed state, and if the siphon water flow inertia backflow phenomenon occurs at the water outlet end, the siphon water flow does not flow into the water inlet end but is discharged through the normally open channel through the air inlet assembly, so that the water inlet device is higher in sensitivity and better in sealing property.

According to the invention, the stroke between the anti-siphon valve and the air inlet assembly is shortened by increasing the inner pipe part, so that the air inlet of the air inlet assembly can be rapidly sealed when the anti-siphon valve is subjected to pressure water at the water inlet end, and water is prevented from seeping out of the air inlet to cause waste; when the water inlet end loses water suddenly and generates negative pressure, the inner pipe part can be quickly sealed, and the water at the water outlet end is prevented from flowing back into the public water channel at the water inlet end.

The anti-overflow siphon valve adopts the elastic pressing piece, when the inner pipe part generates negative pressure, the elastic pressing piece can be tightly attached to the pipe edge of the inner pipe part, the pipe edge is sealed in a concave mode, the sealing performance is high, when the inner pipe part discharges water, the elastic pressing piece is quickly deformed, the whole anti-siphon valve is quickly sprung upwards, the sensitivity is high, and the anti-overflow effect is good.

The rigid sealing pressing piece is selected and matched with the flexible sealing surface, and when the anti-siphon valve is pressed, the rigid sealing pressing piece can be pressed against the flexible sealing surface, so that the combination degree of the rigid sealing pressing piece and the flexible sealing surface is improved, and the matching degree of the air inlet assembly and the anti-siphon valve is further improved.

Drawings

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

Fig. 1 is a cross-sectional view of a dual-circuit flush valve for preventing siphon backflow according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a dual-water-path flush valve for preventing siphon backflow according to an embodiment of the present invention.

Fig. 3 is an exploded view of a dual-water-path flush valve for preventing siphon backflow according to embodiment 1 of the present invention.

Fig. 4 is a schematic view of a dual-water-path flush valve for preventing siphon backflow according to embodiment 1 of the present invention in a first operating state.

Fig. 5 is a schematic diagram of a second operating state of the dual-water-path flush valve for preventing siphon backflow according to embodiment 1 of the present invention.

Fig. 6 is a schematic structural diagram of an air intake assembly according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a first guide vane according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a second guide vane according to an embodiment of the present invention.

Fig. 9 is a schematic structural view of a dual-water-path flush valve for preventing siphon backflow according to embodiment 2 of the present invention.

Detailed Description

The embodiments of the present invention are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating the purposes, technical solutions and advantages of the embodiments of the present invention, which will be described in detail and fully with reference to the accompanying drawings in the embodiments of the present invention. All other implementations that can be derived by one of ordinary skill in the art based on the embodiments of the present invention show or imply relative importance or implicitly indicate the number of technical features indicated, without inventive step. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 9, a dual water path flush valve for preventing siphon reverse flow, comprising: have into water and hold 1 and go out the valve body of water end 2, it includes an outer tube portion 13 to intake end 1, and sets up the inside inner tube portion 12 of outer tube portion 13, the pipe edge of inner tube portion 12 is higher than go up of water end 2 is followed, be provided with anti-siphon valve 3 on the inner tube portion 12, anti-siphon valve 3's top is provided with air intake component 5, anti-siphon valve 3 is in seal when intaking end 1 is intake air intake component 5's bottom, and seal when intaking end 1 produces the negative pressure intake end 1's pipe edge further includes out water component 6.

Wherein, because the pipe edge of inner tube portion 12 is higher than go up along of outlet end 2, can avoid remaining the rivers inflow in outlet end 2 and intake end 1, and, even return phenomenon appears in outlet end 2, certain flow and the high anti-siphon valve 3 that just can probably cause the reflux to inner tube portion 12 of also needing to flow back, and, because anti-siphon valve 3's dead weight effect, can guarantee to intake end 1 in case the dehydration produces the negative pressure, anti-siphon valve 3 can seal intake end 1 rapidly, the design cooperation of inner tube portion 12 choosing high can be along with the anti-siphon valve 3 of dead weight and pressure water action, the double-barrelled is together, stop outlet end 2's backflow inflow and intake end 1, the inner tube portion 12 of choosing high provides sufficient cushion time for anti-siphon valve 3's motion.

Specifically, the anti-siphon valve 3 includes: the elastic pressing piece 32 is tightly attached to the pipe edge of the water inlet end 1 under the action of the dead weight or negative pressure generated at the water inlet end 1, the sealing pressing piece 33 is arranged above the elastic pressing piece 32, and the sealing pressing piece 33 is pressed on the air inlet assembly 5 under the action of the water flow pressure of the water inlet end 1.

In order to improve the sealing effect between the sealing pressing member 33 and the air intake component 5, a sealing surface 4 is further arranged between the anti-siphon valve 3 and the air intake component 5, and the sealing surface 4 comprises a sealing gasket 41 tightly attached to the air intake component 5 and an air intake concave surface 42 arranged in the sealing gasket 41 and concave to one side of the air intake component 5.

The soft elastic pressing piece 32 is matched with the pipe edge of the hard inner pipe part 12, and the hard sealing pressing piece 33 is matched with the soft sealing surface 4, so that the sealing effect of the elastic pressing piece 32 on the water inlet end 1 and the sealing effect of the sealing pressing piece 33 on the air inlet concave surface 42 of the bottom sealing surface 4 of the air inlet assembly 5 can be greatly guaranteed.

The anti-siphon valve 3 further comprises a valve rod 34 penetrating through the elastic pressing member 32 and the closing pressing member 33, and a flow dividing head 31 arranged at the bottom of the valve rod 34, wherein the valve rod 34 reciprocates along the axial direction of the air inlet assembly 5.

Specifically, flow distribution head 31 is a conical head orientation the conical structure of the end 1 direction of intaking intakes of intaking can shunt the pressure water of intaking from end 1 and gushing into, lets pressure water flow along both ends dispersion, prevents to form turbulent flow or vortex in flow distribution head 31 department.

Further, the water inlet end 1 further comprises a connecting part 11 connected with an external water source, and the connecting part 11 is connected with the bottom of the inner pipe part 12.

Further, the inner tube portion 12 is integrally formed with the connecting portion 11.

Further, the air intake assembly 5 comprises an air intake cover 51 connected with the outer pipe part 13, a cavity 52 arranged in the air intake cover 51, and a joint 53 arranged at one side of the air intake cover 51, the inner side of the cavity 52 is connected with the valve rod 34 in a guiding manner, the air intake cover 51 is provided with a plurality of air inlets 54, and the air intake assembly 5 is communicated with the external atmosphere through the air inlets 54, so that the siphon phenomenon in the flush valve can be broken.

The cavity 52 can limit the movement path of the valve rod 34, so that the valve rod 34 can always move along the vertical direction, and the joint 53 can guide out possibly sucked suction water in time, so that the suction water is prevented from being accumulated in the air inlet cover 51 to block air inlet.

Further, the water outlet assembly 6 comprises a water outlet member 64 connected to the water outlet end 2, a water outlet cover 62 disposed on the water outlet member 64, a water stop 63 connected between the water outlet cover 62 and the water outlet member 64, and an electromagnetic valve 61 disposed on the water outlet cover 62, wherein the water stop 63 is used for opening or closing a passage between the water outlet end 2 and the water outlet member 64.

Furthermore, a first baffle 121 is disposed at a position where the outer peripheral surface of the inner tube 12 is flush with the water outlet end 2, and a second baffle 641 is disposed at a position where the water outlet member 64 is flush with the water outlet end 2.

Wherein, first water conservancy diversion piece 121 can lead, divide the reposition of redundant personnel from the rivers that flow into outer tube portion 13 from inner tube portion 12, and second water conservancy diversion piece 641 can lead, divide the rivers that flow into out water piece 64 from outer tube portion 13, can reduce the turbulent flow, the indiscriminate phenomenon of flowing here, simultaneously, reduces the impact, the delay of rivers at this moment, reduces when flow resistance makes rivers can pass through fast, reduces the rivers noise.

The specific implementation process of the invention is as follows:

when the water inlet end 1 supplies water normally:

at this time, the pressure water will flow into the inner tube 12 through the connection part 11, and then the pressure water flows into the inner tube 12, so as to jack up the flow dividing head 31, so that the flow dividing head 31 pushes the valve rod 34 to move upward, the elastic pressing piece 32 and the sealing pressing piece 33, which are sleeved on the valve rod 34, will also act therewith, when the elastic pressing piece 32 is jacked up, the pressure water will flow into the outer tube 13 from the jacked gap rapidly, and at the same time, when the elastic pressing piece 32 is jacked up, the sealing pressing piece 33 will also compress the sealing surface 4 rapidly, so as to seal the air passage between the air intake assembly 5 and the outer tube 13, so as to prevent the water from being ejected from the air intake assembly 5, and the pressure water at this time will fill the water outlet 2 until the electromagnetic valve 61 opens the water stop pad 63 to output the water from the water outlet 64 to the toilet bowl for flushing.

When water inlet end 1 suddenly loses water supply and generates negative pressure:

when water supply is lost, the anti-siphon valve 3 loses support of water pressure instantly, and can descend rapidly due to the gravity of the anti-siphon valve and the negative pressure attraction force applied to the anti-siphon valve, the elastic pressing part 32 can be pressed on the pipe edge of the inner pipe part 12 when the anti-siphon valve descends, the sealing pressing part 33 descends to separate from the sealing surface 4, so that external air can enter the outer pipe part 13 through the air inlet concave surface 42 in the middle of the sealing surface 4, namely the external air can enter the water outlet end 2 through the air inlet assembly 5 and the air inlet concave surface 42 to block siphon, the water outlet end 2 loses negative pressure and cannot pump dirty water communicated with toilet water in the water outlet part 64, and due to the raised design of the inner pipe part 12, water pumped by siphon negative pressure often does not reach the pipe edge of the inner pipe part 12, the elastic pressing part 32 falls to seal the inner pipe part 12, and the phenomenon that the toilet water is pumped back to the inner pipe part 12 when the siphon negative pressure is generated is avoided; when the siphon is blocked, the sucked water may be discharged through the sealing surface 4 through the air inlet unit 5 due to the flow inertia, or may be directly returned to the toilet through the water outlet member 64 by instantaneously losing the negative pressure.

Example 2

Referring to fig. 9, the present embodiment is different from embodiment 1 in that:

the inner pipe part 12 and the connecting part 11 can be detachably connected, so that the inner pipe part 12 and the connecting part 11 can be independently detached and replaced when being damaged independently, and the whole assembly does not need to be replaced.

Example 3

A water tank comprises the double-water-path flushing valve capable of preventing siphon backflow, and the water tank comprises a water inlet channel, wherein the water inlet channel is communicated with a water inlet end 1.

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