CN216666580U - Flushing valve - Google Patents

Abstract

The utility model discloses a flush valve, which comprises a valve body, wherein the valve body at least comprises a main pipe, a first water outlet pipe and a second water outlet pipe, wherein the first water outlet pipe and the second water outlet pipe are communicated with the main pipe; the structure is simple, compact and reasonable, and the use is convenient.

Description

Flushing valve

Technical Field

The utility model relates to the technical field of bathroom products, in particular to a flushing valve.

Background

The closestool is the necessity of life, and along with the improvement of standard of living to and the continuous promotion of aesthetic requirement, people also are more and more high to requirements such as the outward appearance of closestool and convenience of use, in order to satisfy people's demand, intelligent closestool takes place.

In order to make the whole closestool more beautiful and concise, the closestool on the market is designed into a flat structure without a water storage tank, and because the water storage tank is not arranged, the closestool mostly adopts a water passing device to control a tap water supply pipeline to directly supply water for flushing. In the conventional toilet, a washing water channel for washing a bowl wall surface of a toilet seat and a spray water channel for spraying a bottom of a bowl of the toilet seat are provided in many cases, and therefore, a water passing device is generally used for controlling on/off of the washing water channel and the spray water channel at the same time.

Most of the flush valves on the market at present are provided with a water inlet pipe and two water outlet pipes, wherein the water inlet pipe is communicated with a tap water pipeline, one water outlet pipe is communicated with a washing water channel of a closestool, and the other water outlet pipe is communicated with a spraying water channel of the closestool. However, the existing drainage channels communicated with the water outlet pipe on the market are basically directly communicated and drained from the top of the water outlet pipe, the stroke of the drainage channels is short, the pressure of the drainage hole at the top of the water outlet pipe influences the pressure of the pressure relief hole, the two pressures are balanced, and the control valve cannot be opened.

SUMMERY OF THE UTILITY MODEL

The utility model provides a flushing valve for solving the problems.

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

the utility model provides a flush valve, includes the valve body, the valve body at least including be responsible for and with be responsible for the first outlet pipe and the second outlet pipe that link up mutually, be responsible for vertically be provided with first outlet pipe with the second outlet pipe is corresponding and be used for control first outlet pipe with the control valve that the second outlet pipe was opened and close, with first outlet pipe with the second outlet pipe is separated each other and is kept away from the first earial drainage passageway group and the second earial drainage passageway group that oppose each other that control valve one end set up, first earial drainage passageway group with the second earial drainage passageway group with the control valve can be opened and close and link up the setting.

Preferably, one-way valves are arranged on the sides, far away from the control valve, of the first leakage channel group and the second leakage channel group; the valve body still includes the inlet tube, the inlet tube first outlet pipe with the second outlet pipe is followed the axial interval of being responsible for is arranged connect in be responsible for on, the inlet tube is located seted up on the lateral wall in the main pipe with be responsible for the communicating water hole of crossing of inner chamber.

Preferably, the first water outlet pipe and the second water outlet pipe are integrally formed with the main pipe or are assembled in a split manner.

Preferably, the axial of being responsible for is provided with and is located the first apopore and the second apopore of inlet tube both sides, first apopore with the second apopore is connected respectively first outlet pipe with the second outlet pipe.

Preferably, a first valve seat is formed at one end of the main pipe longitudinally opposite to the first water outlet pipe, a second valve seat is formed at one end of the main pipe longitudinally opposite to the second water outlet pipe, the first valve seat is provided with a first valve cavity communicated with the water inlet pipe, and the first valve cavity is communicated with the first water outlet pipe through a first valve port; the second valve seat is provided with a second valve cavity communicated with the water inlet pipe, the second valve cavity is communicated with the second water outlet pipe through a second valve port, and the two control valves are respectively arranged on the first valve seat and the second valve seat.

Preferably, the two control valves are respectively set as a first control valve and a second control valve, the first control valve and the second control valve are respectively provided with a pressure relief hole, the outer wall surface of the main pipe is also integrally formed with a water drainage channel, and the water drainage channel is communicated with the first water outlet pipe and/or the second water outlet pipe; when the first control valve is opened, the water flow discharged from the corresponding pressure relief hole flows to the second flow discharge channel group, and when the second control valve is opened, the water flow discharged from the corresponding pressure relief hole flows to the first flow discharge channel group.

Preferably, the water drainage channels are communicated with the first water outlet pipe and the second water outlet pipe; the water outlet device is characterized in that a first drainage groove is formed in the first water outlet pipe, a second drainage groove is formed in the second water outlet pipe, the first drainage groove is communicated with a water outlet channel of the first water outlet pipe through a first water outlet hole, and the second drainage groove is communicated with the water outlet channel of the second water outlet pipe through a second water outlet hole.

Preferably, the main pipe is respectively spaced from and parallel to the first water outlet and the second water outlet, and is provided with a first drainage channel and a second drainage channel, the first drainage channel and the second drainage channel are respectively arranged corresponding to the first drainage channel and the second drainage channel, the first drainage channel is communicated with the drainage channel through a first drainage hole, and the second drainage channel is communicated with the drainage channel through a second drainage hole; the pressure relief hole corresponding to the first control valve, the water drainage channel, the second water outlet hole and the second water outlet pipe form the second water drainage channel group, and the pressure relief hole corresponding to the second control valve, the water drainage channel, the first water outlet hole and the first water outlet pipe form the first water drainage channel group.

Preferably, the first control valve and the second control valve respectively further include a valve cover, a water-stopping rubber pad and an electromagnetic mechanism, the valve cover is connected and fixed to the port of the main pipe and seals and clamps the periphery of the water-stopping rubber pad between the valve cover and the corresponding valve seat, the middle of the water-stopping rubber pad is in open-close fit with the corresponding valve port, a pressure chamber is formed between the valve cover and the water-stopping rubber pad, a through flow passage for communicating the pressure chamber and the water inlet pipe is arranged on the water-stopping rubber pad, and the electromagnetic mechanism is provided with an electromagnetic iron core for controlling the opening and closing of the pressure relief hole; the pressure relief hole is arranged on the valve cover, the valve cover is further provided with a pressure relief joint communicated with the pressure relief hole, and the valve cover is fixedly connected with the port of the main pipe, and the pressure relief joint is communicated with the corresponding water drainage channel.

Preferably, still be equipped with the stagnant water cushion protective sheath of being made by the stereoplasm material on the stagnant water cushion, the middle part cover of stagnant water cushion is located stagnant water cushion protective sheath, be equipped with the flow tube that both ends link up on the stagnant water cushion protective sheath, the flow tube is worn to locate the through-flow way, the inlet tube with the pressure chamber passes through the flow tube is linked together, stagnant water cushion protective sheath with still bounce a second elastic component between the valve gap, connect one on the second elastic component and prevent stifled needle, prevent stifled needle and wear to locate the flow tube, and the cross sectional dimension who prevents stifled needle is less than the cross sectional dimension of flow tube, prevent stifled needle and be in it is relative under the drive of second elastic component the flow tube reciprocates.

The utility model has the beneficial effects that:

through arranging a first leakage channel group and a second leakage channel group which are mutually opposite and are mutually spaced from the first water outlet pipe and the second water outlet pipe and arranged at one end far away from the control valve, the control valve at one end of the first water outlet pipe controls the water flow of the pressure relief hole to flow to the opposite second leakage channel group and the control valve at one end of the second water outlet pipe to flow to the opposite first leakage channel group, and the water flows in the opposite water channel without water pressure can be discharged more quickly and easily, so that the pressure of the leakage channel group can not influence the pressure at the pressure relief hole to prevent the control valve from being opened; one-way valves are arranged in the first drainage channel group and the second drainage channel group, so that the water flow of the water outlet pipe cannot flow into the first drainage channel group and the second drainage channel group in a series mode; the structure is simple, compact and reasonable, and the use is convenient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is an isometric view of a flush valve of the present invention.

Fig. 2 is an exploded view of a flush valve of the present invention.

Fig. 3 is an exploded cross-sectional view of a flush valve of the present invention.

FIG. 4 is a first axial cross-sectional view of a flush valve of the present invention.

FIG. 5 is a second cross-sectional axial view of a flush valve of the present invention.

FIG. 6 is a third cross-sectional axial view of a flush valve of the present invention.

FIG. 7 is a fourth cross-sectional axial view of a flush valve of the present invention.

Reference numbers in the figures:

10-a valve body; 11-main tube; 111-a first weep hole; 112-a second weep hole; 113-a purge interface; 12-a water inlet pipe; 121-water through holes; 13-a first water outlet pipe; 131-a first valve port; 14-a second water outlet pipe; 141-a second valve port; 15-a first valve seat; 151-a first valve chamber; 16-a second valve seat; 161-a second valve chamber;

20-a first control valve; 21-valve cover; 211-relief vent; 212-pressure relief fitting; 22-water stop rubber mat; 23-water stop rubber mat protective sleeve; 24-a second elastic member; 25-anti-blocking needle; 26-an electromagnetic mechanism;

30-a second control valve; 31-valve cover; 311-pressure relief holes; 312-pressure relief fitting; 32-water stop rubber mat; 33-water stop rubber mat protective sleeve; 34-a second elastic member; 35-anti-blocking needle; 36-an electromagnetic mechanism;

40-a drainage channel; 41-a first bleed passage; 42-a second bleed passage;

50-anti-siphon structure; 51-anti-siphon body; 511-suction inlet; 52-an air inlet; 53-anti-siphon plug.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1 to 7, a flush valve according to a preferred embodiment of the present invention includes a valve body 10, where the valve body 10 includes a main pipe 11, a water inlet pipe 12, a first water outlet pipe 13, and a second water outlet pipe 14. The inlet tube 12 the first outlet pipe 13 with the second outlet pipe 14 is followed the axial interval arrangement who is responsible for 11 connect in be responsible for on 11, just the inlet tube 12 is located first outlet pipe 13 with between the second outlet pipe 14, the inlet tube 12 is located be responsible for and seted up on the lateral wall in 11 with be responsible for the communicating water hole 121 that crosses of 11 inner chambers of being responsible for. The first water outlet pipe 13 and the second water outlet pipe 14 can be integrally formed with the main pipe 11 or can be assembled and arranged in a split mode; in this embodiment, the first water outlet pipe 13 and the second water outlet pipe 14 are assembled with the main pipe 11 in a split manner, a first water outlet hole and a second water outlet hole are axially arranged on the main pipe 11 and located at two sides of the water inlet pipe 12, and the first water outlet hole and the second water outlet hole are respectively connected to the first water outlet pipe 13 and the second water outlet pipe 14. A first valve seat 15 is formed at one end of the main pipe 11 longitudinally opposite to the first water outlet pipe 13, a second valve seat 16 is formed at one end of the main pipe 11 longitudinally opposite to the second water outlet pipe 14, the first valve seat 15 is provided with a first valve cavity 151 communicated with the water inlet pipe 12, and the first valve cavity 151 is communicated with the first water outlet pipe 13 through a first valve port 131; the second valve seat 16 has a second valve chamber 161 communicating with the inlet pipe 12, and the second valve chamber 161 communicates with the second outlet pipe 14 through a second valve port 141. The flushing valve further comprises a first control valve 20 movably arranged on the first valve seat 15 to control the opening and closing of the first valve port 131, and a second control valve 30 movably arranged on the second valve seat 16 to control the opening and closing of the second valve port 141.

In this embodiment, the first control valve 20 and the second control valve 30 are respectively provided with pressure relief holes 211 and 311, the outer wall surface of the main pipe 11 is further integrally formed with a water drainage channel 40, and the water drainage channel 40 is communicated with the first water outlet pipe 13 and/or the second water outlet pipe 14; the main pipe 11 is provided with a first drainage channel and a second drainage channel at intervals with the first water outlet and the second water outlet respectively, the first drainage channel and the second drainage channel are communicated with the drainage channel, and the first drainage channel and the second drainage channel are arranged on the sides, close to the water inlet pipe, of the first water outlet and the second water outlet; a check valve (not shown) is disposed on a side of each of the first drain passage and the second drain passage away from the first control valve 20 and the second control valve 30. When the first control valve 20 is opened, the water flow discharged from the corresponding pressure relief hole 211 flows to the water discharge channel 40, then flows to the second water discharge channel, and is discharged from the second water outlet pipe 14, and the one-way valve prevents the water flow from flowing from the second water outlet pipe 14 to the second water discharge channel; when the second control valve 30 is opened, the water flow discharged from the corresponding pressure relief hole 311 flows to the water discharge channel 40, then flows to the first water discharge channel, and is discharged from the first water outlet pipe 13, and the check valve prevents the water flow from flowing from the first water outlet pipe 13 to the first water discharge channel. The drainage channel 40 and the main pipe 11 are integrally formed, so that the structure is more compact and simpler, and the manufacturing efficiency is greatly improved.

In this embodiment, the first water outlet pipe 13 is provided with a first drainage groove corresponding to the first drainage channel, the second water outlet pipe 14 is provided with a second drainage groove corresponding to the second drainage channel, the first drainage channel is communicated with the first water outlet pipe through a first water outlet, and the second drainage channel is communicated with the second water outlet pipe through a second water outlet. When the first control valve 20 is opened to release pressure, water flows out from the corresponding pressure release hole 211, flows to the water drainage channel 40, flows to the second water drainage channel, and flows to the second water outlet pipe 14 from the second water outlet hole to be discharged; when the second control valve 30 is opened to release the pressure, the water flows from the corresponding pressure release hole 311 to the water discharge channel 40, then flows to the first water discharge channel, and flows from the first water discharge hole to the first water discharge pipe 13 to be discharged.

In this embodiment, still include anti-siphon structure 50, anti-siphon structure 50 includes hollow anti-siphon body 51, sets up on being responsible for 11 the roof and with the communicating air inlet 52 of inlet tube 12 and the activity are located in the anti-siphon body 51 and with air inlet 52 matched with anti-siphon stopper 53, be equipped with on the anti-siphon body 51 with the communicating induction port 511 of outside air, anti-siphon stopper 53 can open under the inlet water hydraulic pressure effect of inlet tube 12 the air inlet 52 so that induction port 511 with inlet tube 12 is linked together, when inlet tube 12 stops watering, anti-siphon stopper 53 closes under the effect of self gravity or the elastic force of first elastic component (not shown) air inlet 52. The anti-siphon structure 50 is skillfully arranged, so that the valve body 10 is simpler and more compact as a whole.

In this embodiment, the first control valve 20 and the second control valve 30 further include valve covers 21 and 31 and water-stopping rubber pads 22 and 32, respectively, the valve covers 21 and 31 are fixed to the port of the main pipe 11 in a covering manner, and the peripheries of the water-stopping rubber pads 22 and 32 are fixed between the valve covers 21 and 31 and the corresponding valve seats in a sealing and clamping manner, the middle portions of the water-stopping rubber pads 22 and 32 are in open-close fit with the corresponding valve ports, pressure chambers are formed between the valve covers 21 and 31 and the water-stopping rubber pads 22 and 32, and the water-stopping rubber pads 22 and 32 are provided with through flow passages for communicating the pressure chambers with the water inlet pipe 12; the pressure relief hole 211, 311 is arranged on the valve cover 21, 31, the valve cover 21, 31 is further provided with a pressure relief joint 212, 312 communicated with the pressure relief hole 211, 311, the valve cover 21, 31 is covered and fixed at the port of the main pipe 11, the pressure relief joint 212, 312 is communicated with a corresponding drainage channel, thereby the structure of the valve cover 21, 31 is simple, and the assembly of the valve cover 21, 31 is simpler and faster.

In this embodiment, the first control valve 20 and the second control valve 30 further include electromagnetic mechanisms 26 and 36, respectively, and the electromagnetic mechanisms 26 and 36 are provided with electromagnetic cores for controlling the opening and closing of the pressure relief holes 211 and 311; the electromagnetic mechanisms 26 and 36 of the first control valve 20 and the second control valve 30 are electrically connected to a control main board (not shown).

In this embodiment, the water-stopping rubber pads 22 and 32 are further provided with water-stopping rubber pad protective sleeves 23 and 33 made of hard materials, the middle parts of the water-stopping rubber mats 22 and 32 are sleeved on the water-stopping rubber mat protective sleeves 23, 33, the water-stopping rubber mat and the protective sleeves 23 and 33 are provided with a through flow pipe with two through ends, the through flow pipe is arranged in the through flow passage in a penetrating way, the water inlet pipe 12 is communicated with the pressure cavity through the through flow pipe, a second elastic part 24, 34 is also ejected between the water stop rubber mat protective sleeves 23, 33 and the valve covers 21, 31, the second elastic parts 24 and 34 are connected with anti-blocking needles 25 and 35, the anti-blocking needles 25 and 35 are arranged in the draft tube in a penetrating way, and the section size of the anti-blocking needles 25 and 35 is smaller than that of the through flow pipe, and the anti-blocking needles 25 and 35 are driven by the second elastic pieces 24 and 34 to move in a reciprocating mode relative to the through flow pipe. By arranging the water-stopping rubber mat protective sleeves 23 and 33, the second elastic pieces 24 and 34 and the anti-blocking needles 25 and 35, the water-stopping rubber mats 22 and 32 can control the corresponding valve ports to be opened and closed more reliably.

In this embodiment, the water inlet pipe 12, the first water outlet pipe 13 and the second water outlet pipe 14 are arranged in parallel along the axial direction of the main pipe 11, so that the three pipes are arranged in parallel, which is convenient to connect with an external water path, and the installation is very simple and convenient.

At this time, the electromagnetic mechanisms 26 and 36 of the first control valve 20 open the pressure relief hole 211, and water in the pressure chamber between the valve cover 21 and the water-stopping rubber pad 22 is discharged from the pressure relief hole 211, so that the water-stopping rubber pad 22 opens the first valve port 131 under the action of the water inlet pressure of the water inlet pipe 12, and water in the water inlet pipe 12 flows to the first water outlet pipe 13; meanwhile, the water flow discharged from the pressure relief hole 211 flows to the second water outlet pipe 14 through the water discharge channel 40, the second discharge channel and the second water outlet hole, and is discharged together with the water flow of the second water outlet pipe 14; at this time, the flow direction of the water flow is set to be a second drainage channel group along the drainage channel 40, the second drainage channel, the second water outlet and the second water outlet pipe, and the water channel of the second drainage channel group has no pressure along the drainage channel 40, the first drainage channel, the first water outlet and the water channel of the first water outlet pipe, so that the pressure-relieved water flow is discharged by using a non-pressure water channel, namely the second drainage channel group.

At this time, the electromagnetic mechanism 36 of the second control valve 30 opens the pressure relief hole 311, and water in the pressure chamber between the valve cover 31 and the water-stopping rubber pad 32 is discharged from the pressure relief hole 311, so that the water-stopping rubber pad 32 opens the second valve 141 under the action of the water inlet pressure of the water inlet pipe 12, and the water of the water inlet pipe 12 flows to the second water outlet pipe 14; meanwhile, the water flow discharged from the pressure relief hole 311 flows to the first water outlet pipe 13 through the water discharge channel 40, the first discharge channel and the water outlet hole, and is discharged from the first water outlet pipe 13; at this time, the flow direction of the water flow is set to be a first drainage channel group along the drainage channel 40, the first drainage channel, the first water outlet and the first water outlet pipe, and the water channel of the first drainage channel group has no pressure than the water channel from the drainage channel 40, the second drainage channel, the second water outlet and the second water outlet pipe, so that the pressure-relieved water flow is discharged by using a pressure-free water channel, namely the first drainage channel group.

In this embodiment, the main pipe 11 is further provided with a cleaning interface 113 communicated with a human body cleaning device on a toilet cover plate of the toilet, and the cleaning interface 113 is communicated with the water inlet pipe 12.

According to the utility model, the first drainage channel group and the second drainage channel group which are mutually opposite are arranged at intervals with the first water outlet pipe and the second water outlet pipe and are far away from one end of the control valve, so that the control valve at one end of the first water outlet pipe controls the water flow of the pressure relief hole to flow to the second drainage channel group which is opposite, and the control valve at one end of the second water outlet pipe controls the water flow of the pressure relief hole to flow to the first drainage channel group which is opposite, and the water flows out from the opposite water channels without water pressure more quickly and easily, so that the pressure of the drainage channel group can not influence the pressure at the pressure relief hole to cause that the control valve cannot be opened; one-way valves are arranged in the first drainage channel group and the second drainage channel group, so that the water flow of the water outlet pipe cannot flow into the first drainage channel group and the second drainage channel group in a series mode; the structure is simple, compact and reasonable, and the use is convenient.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. The utility model provides a flush valve, includes the valve body, the valve body at least including be responsible for, and with be responsible for first outlet pipe and the second outlet pipe that link up mutually, be responsible for vertically be provided with first outlet pipe with the second outlet pipe is corresponding and be used for control first outlet pipe with the control valve that the second outlet pipe opened and close, its characterized in that, with first outlet pipe with the second outlet pipe is at an interval each other and is kept away from mutually opposite first earial drainage passageway group and the second earial drainage passageway group that control valve one end set up, first earial drainage passageway group with the second earial drainage passageway group with the control valve can open and close and link up the setting.

2. The flush valve of claim 1, wherein the first and second sets of drain passages are provided with a one-way valve on a side thereof remote from the control valve; the valve body still includes the inlet tube, the inlet tube first outlet pipe with the second outlet pipe is followed the axial interval that is responsible for arrange connect in be responsible for on, the inlet tube is located seted up on the lateral wall in the main pipe with be responsible for the communicating water hole of crossing of inner chamber.

3. The flush valve of claim 2, wherein the first outlet pipe and the second outlet pipe are integrally formed with the main pipe or separately assembled.

4. The flush valve according to claim 3, wherein the main pipe is axially provided with a first outlet hole and a second outlet hole located at two sides of the water inlet pipe, and the first outlet hole and the second outlet hole are respectively connected to the first outlet pipe and the second outlet pipe.

5. The flush valve according to any one of claims 2 to 4, wherein an end of said main pipe longitudinally opposite to said first outlet pipe forms a first valve seat, an end of said main pipe longitudinally opposite to said second outlet pipe forms a second valve seat, said first valve seat has a first valve chamber communicating with said inlet pipe, said first valve chamber communicates with said first outlet pipe through a first valve port; the second valve seat is provided with a second valve cavity communicated with the water inlet pipe, the second valve cavity is communicated with the second water outlet pipe through a second valve port, and the two control valves are respectively arranged on the first valve seat and the second valve seat.

6. The flush valve according to claim 5, wherein the two control valves are respectively provided as a first control valve and a second control valve, the first control valve and the second control valve are respectively provided with a pressure relief hole, the outer wall surface of the main pipe is further integrally formed with a drainage channel, and the drainage channel is communicated with the first water outlet pipe and/or the second water outlet pipe; when the first control valve is opened, the water flow discharged from the corresponding pressure relief hole flows to the second flow discharge channel group, and when the second control valve is opened, the water flow discharged from the corresponding pressure relief hole flows to the first flow discharge channel group.

7. The flush valve of claim 6, wherein said bleed passage is in communication with both said first outlet pipe and said second outlet pipe; the water outlet device is characterized in that a first drainage groove is formed in the first water outlet pipe, a second drainage groove is formed in the second water outlet pipe, the first drainage groove is communicated with a water outlet channel of the first water outlet pipe through a first water outlet hole, and the second drainage groove is communicated with the water outlet channel of the second water outlet pipe through a second water outlet hole.

8. The flush valve according to claim 7, wherein said main pipe is provided with a first drain passage and a second drain passage spaced from and parallel to said first outlet hole and said second outlet hole, respectively, said first drain passage and said second drain passage being provided in correspondence with said first drain passage and said second drain passage, respectively, said first drain passage communicating with said drain passage through a first drain hole, said second drain passage communicating with said drain passage through a second drain hole; the pressure relief hole corresponding to the first control valve, the water drainage channel, the second water outlet hole and the second water outlet pipe form the second water drainage channel group, and the pressure relief hole corresponding to the second control valve, the water drainage channel, the first water outlet hole and the first water outlet pipe form the first water drainage channel group.

9. The flush valve according to claim 8, wherein the first control valve and the second control valve each further comprise a valve cover, a water-stop rubber pad and an electromagnetic mechanism, the valve cover is fixedly connected to the port of the main pipe and seals and clamps the periphery of the water-stop rubber pad between the valve cover and the corresponding valve seat, the middle of the water-stop rubber pad is in open-close fit with the corresponding valve port, a pressure chamber is formed between the valve cover and the water-stop rubber pad, a through flow passage for communicating the pressure chamber with the water inlet pipe is arranged on the water-stop rubber pad, and the electromagnetic mechanism is provided with an electromagnetic iron core for controlling the opening and closing of the pressure relief hole; the pressure relief hole is arranged on the valve cover, the valve cover is further provided with a pressure relief joint communicated with the pressure relief hole, and the valve cover is fixedly connected with the port of the main pipe, and the pressure relief joint is communicated with the corresponding water drainage channel.

10. The flush valve according to claim 9, wherein a water stop rubber mat protective sleeve made of a hard material is further arranged on the water stop rubber mat, the middle of the water stop rubber mat is sleeved on the water stop rubber mat protective sleeve, a through flow pipe with two through ends is arranged on the water stop rubber mat protective sleeve, the through flow pipe is arranged in a through flow way in a penetrating mode, the water inlet pipe is communicated with the pressure chamber through the through flow pipe, a second elastic piece is further ejected between the water stop rubber mat protective sleeve and the valve cover, a blocking prevention needle is connected to the second elastic piece and is arranged in the through flow pipe in a penetrating mode, the cross section size of the blocking prevention needle is smaller than that of the through flow pipe, and the blocking prevention needle is driven by the second elastic piece to move in a reciprocating mode relative to the through flow pipe.

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