CN213926551U

CN213926551U - Flushing valve

Info

Publication number: CN213926551U
Application number: CN202022476130.6U
Authority: CN
Inventors: 管剑潮
Original assignee: Zhejiang Kexin Industry Co ltd
Current assignee: Zhejiang Kexin Industry Co ltd
Priority date: 2020-10-31
Filing date: 2020-10-31
Publication date: 2021-08-10
Anticipated expiration: 2030-10-31

Abstract

The utility model discloses a flushing valve, which comprises a valve body, a valve core, a top pressure part, a valve rod and a flushing switch, wherein the top pressure part comprises a shell and a top rod, the end A of the top rod is in sealing contact with the inner wall of the shell, and a water cavity between the top rod and the shell is communicated with a water outlet pipe; the lower end of the valve rod is matched with the ejector rod; the flush switch is including switch seat and button, the switch seat is equipped with the rivers passageway, the one end internal diameter of the sealed section of rivers passageway is less than other end internal diameter, be equipped with sealing member and elastic component in the rivers passageway, the one end of rivers passageway is passed through inlet tube and water storage chamber switch-on, the other end of rivers passageway passes through outlet pipe and goes out water end switch-on, the button presses down the cooperation with the sealing member. The flushing switch and the valve body are arranged separately and are not limited by distance, so that the valve body, the valve core and the flushing switch are convenient to install and use by a user, and the flushing switch is safer and more sanitary to use.

Description

Flushing valve

Technical Field

The utility model relates to an improved invention of a flushing valve.

Background

In the traditional flush valve, a valve core ejector rod is driven by pressing a hand rod, so that the valve is opened, the hand rod is reset through a spring, if the elasticity of the spring is too small, the hand rod cannot be reset, the spring with large elasticity is required, and a user needs large strength to push the spring and the valve core ejector rod; and the handspike needs and the cooperation of ejector pin, therefore the case of flushometer receives the restriction with press the switch's mounted position, and both need be close to just can cooperate the use, and not only the installation is inconvenient like this, uses inconvenient moreover.

SUMMERY OF THE UTILITY MODEL

In view of the technical problem that exists among the background art, the utility model aims at providing a flushometer, not only simple to operate, convenient to use moreover.

In order to solve the technical problem, the utility model discloses a following technical scheme: the flushing valve is characterized by comprising

The water inlet end and the water outlet end are arranged on the valve body;

the valve core is arranged in the valve body, the valve core is in sealing fit with a valve core sealing surface in the valve body, the valve core and the valve core sealing surface are arranged on water flow channels at a water inlet end and a water outlet end, a water storage cavity is arranged between the top of the valve core and the valve body, the valve core is provided with an inner cavity, the upper end of the valve core is provided with a water inlet channel and a water through hole, the water inlet channel is communicated with the water inlet end, the water inlet channel is communicated with the water storage cavity in a one-way mode, and the water through hole is communicated with the water storage cavity and the inner cavity of the valve core;

the top pressing part comprises

A shell, the shell is connected with the lower end of the valve body, the inner cavity of the shell is communicated with the water outlet end of the valve body, the shell is connected with a water outlet pipe,

the ejector rod is transversely arranged in the shell and provided with an end A and an end B, the outer diameter of the end A of the ejector rod is larger than the outer diameter of the end B, the circumferential direction of the end A of the ejector rod is in sealing contact with the inner wall of the shell, a water cavity between the end surface of the end A of the ejector rod and the shell is communicated with the water outlet pipe, the end A of the ejector rod is provided with a pressure relief hole, and a spring for resetting the ejector rod is arranged in the shell;

the upper end of the valve rod is a sealing end, the sealing end is arranged in an inner cavity of the valve core and is in sealing fit with the water outlet of the valve core, a second spring for resetting the valve rod is arranged in the inner cavity of the valve core, and the lower end of the valve rod penetrates through the water outlet of the valve core and is matched with the end B of the ejector rod;

and a flush switch, comprising

The switch seat is provided with a water flow channel, the water flow channel is provided with a sealing section, the inner diameter of one end of the sealing section of the water flow channel is smaller than that of the other end of the sealing section of the water flow channel, a sealing element which is in sealing fit with the sealing section and an elastic element which pushes the sealing element to extrude towards the smaller end of the inner diameter of the sealing section are arranged in the water flow channel, one end of the water flow channel is communicated with the water inlet end of the valve body through a water inlet pipe, and the other end of the water flow channel is connected with a water outlet pipe,

and the key is in press fit with the sealing piece.

The utility model discloses a valve body and flush switch pass through inlet tube and water piping connection, and the distance of the two is unrestricted, during the installation, can select the installation environment who is suitable for valve body and flush switch installation respectively according to the demand, and the installation of not only being convenient for like this also is convenient for the user to use, especially is used for washing the closestool, can keep away from the valve body with flush switch, and during the user press switch, can keep away from the filth that washes, and is more sanitary, and the use sense is better. In addition, the flush switch is opened the power that only needs to overcome the elastic component, make the sealing member and the seal section separation of rivers passageway, the water in the end of intaking promotes the ejector pin through inlet tube, seal section and outlet pipe, utilize water pressure to promote the ejector pin, the ejector pin then drives the valve rod swing, the valve rod slope, the delivery port of case is opened, the water in the inner chamber of case and the water storage cavity is through the delivery port of case, discharge from the water outlet end of valve body at last, the log raft in the water storage cavity is empty, the case moves towards the valve body top, the sealed face separation of case in case and the valve door, the end of intaking of valve communicates with each other with the water outlet end, the valve is opened, a large amount of water is discharged from the water outlet end, consequently for opening of traditional flushometer, the utility model discloses only need the user to use less strength just can open the valve switch, it is more extensive to be suitable for the crowd, is fit for children and old person and uses.

Preferably, the flush switch further comprises a panel, the key is mounted on the panel, and a return spring is arranged between the key and the panel.

Preferably, the switch seat is connected with the panel, the sealing element is connected with a pressing rod, and the pressing rod penetrates through the switch seat to be arranged below the key and is in press fit with the key. The button and sealing member adopt spring and elastic component independently to reset respectively, and the button is through pressing down the pole drive sealing member moreover, and not only easy dismounting uses more laborsavingly moreover.

Preferably, the sealing section of the water flow channel is of a circular truncated cone shape, and the sealing piece is matched with the sealing section of the water flow channel, so that the sealing performance is good.

Preferably, install spacing seat in the casing, be equipped with guide channel on the spacing seat, guide channel is passed to the B end of ejector pin, the spring housing is established outside the ejector pin, just the spring setting is between the A end and the spacing seat of ejector pin, spacing seat restriction ejector pin is to the stroke that the valve rod direction removed, guide channel then plays the guide effect to the removal of ejector pin, makes it move along the horizontal direction steadily.

Preferably, a sealing sleeve is arranged at the end A of the ejector rod, the sealing sleeve comprises a columnar body and an annular sealing strip arranged on the outer circumference of the body, the sealing strip is arranged in an inclined manner, and the end with the larger outer diameter of the sealing strip faces the water cavity; the pressure relief hole is formed in the body; the sealing sleeve increases sealed effect, and when the entering water cavity of the water of play water end, water pressure acted on the sealing strip, because of the sealing strip slope and the great end of external diameter towards the water cavity, water pressure made the sealing strip outwards expand and extrude to the shells inner wall, made sealing strip and shells inner wall form high strength sealed effect.

Preferably, the sealing strip becomes thinner towards the outer edge direction, the thicker and stronger the sealing strip is, the thinner and thinner the sealing strip is, the more easily deformable and the inner wall of the shell are attached to each other, so that the strength of the sealing strip can be ensured, and the sealing strip can be matched with the inner wall of the shell in a sealing manner.

Preferably, the sealing strip is arranged at one end of the body, a supporting block is arranged on the end face of the body, the sealing strip and the supporting block are connected into a whole, the ejector rod is arranged at the other end of the body, and the supporting block also increases the strength of the sealing strip to prevent the sealing strip from turning towards the valve rod.

Preferably, the valve core comprises

The upper end of the core body is in sliding fit with the inner wall of the valve body;

the lower seat is connected with the lower end of the core body, a sealing flange is arranged at the upper end of the lower seat, the sealing flange is arranged above an inner supporting plate in the valve body and is in sealing fit with the inner supporting plate, an opening is formed in the lower seat and is arranged below the sealing flange, the water outlet end of the valve body is arranged below the inner supporting plate, and the water inlet end of the valve body is arranged above the inner supporting plate.

Preferably, the valve core comprises

A core body;

the outer edge of the sealing ring is fixed on the valve body, the inner edge of the sealing ring is fixed on the core body, the sealing section of the sealing ring is arranged on the inner bracket in the valve body and is in sealing fit with the inner bracket, the sealing ring is provided with a second water through hole, the second water through hole is arranged between the sealing section and the outer edge of the sealing ring, and the second water through hole is communicated with the water inlet end and the water inlet channel;

and the lower seat is connected with the core body, the lower seat is in sliding fit with the inner wall of the inner bracket, and an opening is formed in the lower seat.

Drawings

Fig. 1 is a schematic view of a valve according to an embodiment of the present invention when the valve is closed.

Fig. 2 is a schematic view of the valve according to an embodiment of the present invention when the valve is opened.

Fig. 3 is a schematic diagram of a valve according to an embodiment of the present invention when closed.

Fig. 4 is a schematic view of the sealing sleeve of the present invention.

Fig. 5 is a sectional view of the sealing sleeve of the present invention.

Detailed Description

The following describes details and operational principles of embodiments and examples of the present invention with reference to the drawings. The flushing valve comprises a valve body 18,

valve cores

16 and 17, a jacking component, a valve rod 41 and a flushing switch, wherein a water inlet end and a water outlet end 25 are arranged on the valve body; the valve core is arranged in the valve body, the valve core is in sealing fit with a valve core sealing surface 24 in the valve body, the valve core and the valve core sealing surface are arranged on a channel from a water inlet end 26 to a water outlet end 25 of the valve body, when the valve core and the valve core sealing surface are closed, the water inlet end and the water outlet end of the valve body are not communicated, the valve is closed, when the valve core is separated from the valve core sealing surface, the water inlet end and the water outlet end of the valve body are communicated, and the valve is opened; a water storage cavity 19 is arranged between the top of the valve core and the valve body, the valve core is provided with an inner cavity 44, the upper end of the valve core is provided with a water inlet channel 21 and a water through hole, the water inlet channel is communicated with a water inlet end 25, the limber hole is communicated with the water storage cavity and the inner cavity of the valve core, the water inlet channel is communicated with the water storage cavity in a one-way, namely, the water at the water inlet end enters the water storage cavity through the water inlet channel, but the water in the water storage cavity can not enter the water inlet channel, the one-way connection can be realized by adopting a damping hole, the top of the valve core is provided with a time delay seat 20, the time delay seat is provided with a damping hole 15 which enables water in the water inlet channel to enter the water storage cavity, one end of the damping hole is connected with the water inlet channel, the other end of the damping hole is connected with the water storage cavity, the damping hole 15 is used for enabling water in the water inlet channel to enter the water storage cavity, and water in the water storage cavity cannot enter the water inlet channel; in order to avoid the blockage of the damping hole, a spring through needle 13 is installed on the delay seat, the through needle of the spring through needle is inserted into the damping hole, after water in the water storage cavity 19 is emptied, the valve core moves towards the top of the valve body until the spring through needle 13 is contacted with the valve body 18, and the spring through needle is pressed and inserted into the damping hole 15, so that the damping hole is unobstructed and is not blocked, and when the spring through needle is separated from the valve body, the elastic force of the spring enables the through needle to reset. The jacking component comprises a shell 35 and an ejector rod 40, the shell is connected with the lower end of a valve body 18, an inner cavity 44 of the shell is communicated with a water outlet end 49 of the valve body, the shell is connected with a water outlet pipe 9, the ejector rod 40 is transversely arranged in the shell, the ejector rod is provided with an end A and an end B, the outer diameter of the end A of the ejector rod is larger than the outer diameter of the end B, the end A of the ejector rod is a left end in the drawing, the end B of the ejector rod is a right end, the end A of the ejector rod is in sealing contact with the inner wall of the shell 35 in the circumferential direction, a water cavity 45 between the end surface A of the ejector rod and the shell is communicated with the water outlet pipe 9, a pressure relief hole is formed in the end A of the ejector rod, a spring 37 for resetting the ejector rod is further arranged in the shell, water in the water outlet pipe enters the water cavity 45, the ejector rod 40 is pushed by water pressure to move rightwards, and when a water flow channel is closed, the water in the water cavity is discharged from the water outlet end 25 through the pressure relief hole, the spring 37 drives the ejector rod to move leftwards until the water in the water cavity 45 is emptied, and the ejector rod 40 resets; the upper end of the valve rod is a sealing end 43, the sealing end is arranged in an inner cavity 44 of the valve core and is in sealing fit with a water outlet 49 of the valve core, a second spring 42 enabling the valve rod to reset is arranged in the inner cavity of the valve core, the second spring is arranged between the top of the valve rod and the inner wall of the valve core, the lower end of the valve rod penetrates through the water outlet of the valve core and is matched with the end B of the ejector rod 40, when the ejector rod pushes the lower end of the valve rod 41, the valve rod inclines, the water outlet 49 of the valve core is opened, water in the inner cavity 44 of the valve core and the water storage cavity 19 passes through the water outlet of the valve core and is finally discharged from the water outlet end 25 of the valve body, after water in the water storage cavity is emptied, the valve core moves towards the top of the valve body 18, the valve rod is separated from the ejector rod, the elastic force of the second spring 42 pushes the valve rod to reset, and the sealing end of the valve rod enables the water outlet to be sealed. The flushing switch comprises a switch seat 5 and a key 2, the switch seat is provided with

water flow channels

6 and 11, each water flow channel is provided with a sealing section 10, the inner diameter of one end of each sealing section of each water flow channel is smaller than that of the other end of each sealing section, a sealing piece 7 in sealing fit with the sealing sections and an elastic piece 8 for pushing the sealing piece to extrude towards the smaller end of the inner diameter of each sealing section are arranged in each water flow channel, and the sealing fit of the sealing pieces and the sealing sections means that when the sealing pieces 7 are pressed against the inner wall of each water flow channel of the sealing sections 10, the water flow channels are blocked, so that a sealing effect is achieved, and the water flow channels are not filled with water, otherwise, when the sealing pieces are separated from the inner wall of each water flow channel of the sealing sections, the water flow channels are unblocked; the key 2 is in press fit with the sealing element 7, namely the key is pressed, the elastic force of the elastic element 8 is overcome, the sealing element moves and is separated from the inner wall of the water flow channel of the sealing section, the water flow channel is smooth, and when the key 2 is released, the elastic element 8 pushes the sealing element to reset, and the water flow channel is closed; the sealing member can adopt the rubber material, and sealed effect is good, the elastic component can adopt the spring, inlet tube 12 and the end 26 switch-on of intaking of valve body are passed through to the one end of rivers passageway, the other end and the outlet pipe 9 of rivers passageway are connected. The valve and the flushing switch can be installed separately by the arrangement of the water inlet pipe and the water outlet pipe, the lengths of the water inlet pipe and the water outlet pipe can be selected according to the installation positions and the installation distances of the valve body and the flushing switch, and the installation environment and the installation positions are wider in selectivity. For example, the valve body is installed in a cavity at the position of the toilet bowl, the flushing switch is installed on a hand washing table outside the door, a user can directly go out of the toilet after finishing washing the toilet, the button 2 is pressed while washing hands, the water flow channel is opened, water at the water inlet end enters the water cavity through the water inlet pipe 12, the water flow channel and the water outlet pipe 9, the water pressure pushes the ejector rod, the ejector rod moves rightwards and pushes the valve rod, the valve rod is inclined, the water outlet of the valve core is opened, water in the inner cavity of the valve core and the water storage cavity passes through the water outlet of the valve core and is finally discharged from the water outlet end of the valve body, after the water in the water storage cavity is emptied, the

valve cores

16 and 17 move towards the top of the valve body, the valve core is separated from the valve core sealing surface 24 in the valve, the water inlet end of the valve is communicated with the water outlet end, the valve is opened, and a large amount of water is discharged from the water outlet end to flush the toilet bowl; after the valve core moves upwards, the valve rod is separated from the ejector rod, and the second spring pushes the valve rod to reset and seal with the water outlet again; after the key 2 is loosened, the elastic part 8 pushes the sealing part 7 to reset, the water flow channel is closed, water in the water cavity is discharged from the water outlet end through the pressure relief hole, the spring drives the ejector rod to move leftwards until the water in the water cavity is emptied, and the ejector rod resets; the water at the water inlet end 26 enters the water storage cavity 16 and the valve core inner cavity 44 through the water inlet channel 21, and with the gradual increase of the water in the water storage cavity, the valve core is pushed to move towards the valve core sealing surface 24 until the valve core is pressed with the valve core sealing surface, the valve is closed, and the water outlet end stops discharging water. The user keeps away from the closestool when using the flush switch, not only avoids peculiar smell, but also more importantly keeps away from dirt, avoids bacterial invasion, and improves the comfort and sanitary safety of use. Additionally, the utility model discloses when using flush switch, only need less power to press down the button and overcome the elasticity of elastic component and just can open the valve, therefore be fit for less children of strength and old person.

The key 2 and the sealing element 4 can be designed integrally or separately, the split design is simpler and more convenient to assemble and disassemble, preferably, the flush switch also comprises a panel 1, the key is arranged on the panel, a return spring 3 is arranged between the key and the panel, as shown in the attached drawing 1, the key is embedded in an installation groove of the panel 1, the key and the sealing element are respectively reset independently by adopting a spring and an elastic element, and the spring with low elastic coefficient can be adopted, so that the press is more convenient and labor-saving; in order to facilitate installation, the switch base 5 is connected with the panel 1, the sealing element 7 is connected with a pressing rod 4, the pressing rod penetrates through the switch base 5 and is arranged below the key and is in press fit with the key 2, and a sealing ring is arranged between the pressing rod and the switch base to prevent water leakage; the key is pressed, firstly, the elastic force of the reset spring 3 is overcome, the key 2 is contacted with the pressing rod 4, and the pressing rod and the sealing element 7 connected with the pressing rod are driven to move, so that the sealing element is separated from the inner wall of the water flow channel, a gap is formed between the sealing element and the inner wall of the water flow channel, and then the water flow channel is opened; when the key is released, the elastic force of the return spring enables the key 2 to be quickly reset, and the elastic force of the elastic piece enables the sealing piece 7 to be reset to close the water flow channel again. The sealing member divides the rivers passageway into first passageway 11 and second passageway 9, elastic component 8 sets up in first passageway 11, that is to say this end that the sealing section internal diameter is less is towards second passageway 9, and the great one end of internal diameter is towards first passageway 11, inlet tube 12 is connected with first passageway 11, outlet pipe 9 is connected with second passageway 6, and the water in the water storage chamber passes through the inlet tube and gets into first passageway, and water pressure acts on sealing member 7 equally, makes the sealing member hug closely in the sealing section inner wall, improves sealed effect, therefore compares in inlet tube and second passageway connection, and above-mentioned scheme sealed effect is better. In order to further improve the sealing effect, the sealing section 10 of the water flow channel is in a circular truncated cone shape, the sealing element 7 is matched with the sealing section of the water flow channel, the sealing element enters the sealing section 10, the sealing element is extruded and completely blocks the sealing section, and the sealing effect is ensured.

For the stroke that the control ejector pin removed, install spacing seat 38 in the casing, be equipped with guide channel 39 on the spacing seat, guide channel is passed to the B end of ejector pin 40, the spring 37 cover is established outside the ejector pin, just the spring setting is between the A end and the spacing seat of ejector pin, guide channel 39 then plays the guide effect to the removal of ejector pin, and when the water cavity intake, water pressure promoted the ejector pin and steadily removed right along guide channel. In order to improve the sealing effect, a sealing sleeve 36 is arranged at the end A of the ejector rod, the sealing sleeve can be made of rubber, the sealing sleeve comprises a columnar body 46 and an annular sealing strip 47 arranged on the outer circumference of the body, the sealing strip is obliquely arranged as shown in figure 5, the larger outer diameter end of the sealing strip faces to a water cavity as shown in figure 1, namely the outer diameter of the left end of the sealing strip is larger than that of the right end of the sealing strip, and the pressure relief hole is formed in the body 46; the seal cover increases sealed effect, and when the entering water cavity 45 of the water of outlet pipe 9, water pressure acts on sealing strip and body, because of the sealing strip slope and the great end of external diameter towards the water cavity, water pressure makes the sealing strip outwards expand and extrude to shells inner wall for sealing strip 47 and the shells inner wall form high strength sealed effect. The sealing strip 47 becomes thinner towards the outer edge direction, the thicker the sealing strip is, the higher the strength is, the thinner the sealing strip is, the more easily deformed the sealing strip is, the sealing strip is attached to the inner wall of the shell, the joint between the sealing strip and the body is thicker, the strength is increased, the contact end of the sealing strip and the shell is thinner, and the sealing strip is attached to the inner wall of the shell, so that the strength of the sealing strip can be ensured, the sealing strip is prevented from being turned over reversely, and the sealing strip can be matched with the inner wall of the shell in a sealing way; in order to further increase the strength of the sealing strip and prevent the sealing strip from being turned over reversely, the sealing strip is arranged at one end part of the body, a supporting block 15 is arranged on the end surface of the body, the sealing strip is connected with the supporting block into a whole, the ejector rod 40 is arranged at the other end of the body, the strength of the sealing strip is increased through the same supporting block, the sealing strip is prevented from being turned over towards the direction of the valve rod, and the sealing effect is guaranteed.

The utility model discloses a case reduces and removes along with the water of water storage intracavity, and the case removes then with the sealed face separation of case in the valve body, and the valve is then opened, the water increase in the water storage intracavity then promotes the case and removes and compaction, sealing to the sealed face of case, and the valve is then closed. The valve core has a plurality of structures, and two embodiments are described below with reference to the accompanying drawings.

In the first embodiment, the valve core comprises a core body 16 and a lower seat 17, the upper end of the core body is in sliding fit with the inner wall 14 of the valve body, and the upper end of the core body and the inner wall are matched to enable the valve core to move stably in the valve body; the lower seat 17 is connected with the lower end of the core body, the upper end of the lower seat is provided with a sealing flange 22, the sealing flange is arranged above an inner supporting plate 23 in the valve body and is in sealing fit with the inner supporting plate, the pressing part of the inner supporting plate and the sealing flange is a valve core sealing surface 24, the lower seat 17 is provided with an opening, the opening is arranged below the sealing flange, the water outlet end 25 of the valve body is arranged below the inner supporting plate 23, and the water inlet end of the valve body is arranged above the inner supporting plate; when water in the water storage cavity 19 is discharged, the valve core moves towards the top of the valve body, the sealing flange 22 of the lower seat is separated from the inner supporting plate 23, water at the water inlet end directly passes through the opening in the lower seat and is discharged from the water outlet end, when the water in the water storage cavity increases, the water pressure pushes the valve core to move towards the inner supporting plate until the sealing flange 22 and the inner supporting plate 23 are pushed to be compacted, and the valve is closed.

In the second embodiment, the valve core comprises a core body 16, a sealing ring 32 and a lower seat 17; the sealing ring can also be made of rubber materials, the outer edge 33 of the sealing ring is fixed on the valve body, the inner edge 30 of the sealing ring is fixed on the core body, the sealing section 29 of the sealing ring is arranged on the inner bracket 27 in the valve body, the sealing section 29 is in sealing fit with the inner bracket 27, a second water through hole 31 is formed in the sealing ring and arranged between the sealing section and the outer edge of the sealing ring, and the second water through hole is communicated with the water inlet end 26 and the water inlet channel 21, namely water at the water inlet end enters the water inlet channel 21 through the second water through hole 31; the lower seat 17 is connected with the core body 16, the lower seat is in sliding fit with the inner wall of the inner bracket 27, and an opening is formed in the lower seat; similarly, the pressing part of the inner bracket 27 and the sealing ring 32 is the valve core sealing surface 24, when the water in the water storage cavity 19 is discharged, the valve core moves towards the top of the valve body, the sealing section 29 of the sealing ring is separated from the inner bracket 27, the water inlet end of the valve body is communicated with the water outlet end, the water at the water inlet end is discharged from the water outlet end through the opening on the lower seat, when the water in the water storage cavity increases, the water pressure pushes the valve core to move towards the inner bracket until the water inlet end and the water outlet end of the valve body are not communicated when the sealing section of the sealing ring is pressed with the inner bracket, and the valve is closed.

Claims

1. A flushing valve is characterized by comprising

The water inlet end and the water outlet end are arranged on the valve body;

the top pressing part comprises

and a flush switch, comprising

and the key is in press fit with the sealing piece.

2. The flush valve of claim 1, wherein said flush switch further comprises a faceplate, said button is mounted on said faceplate, and a return spring is disposed between said button and said faceplate.

3. The flush valve of claim 2, wherein the switch housing is connected to the faceplate, and the seal member is connected to a push rod that extends through the switch housing and is disposed below the button and in press-fit engagement with the button.

4. The flush valve of claim 1, wherein said seal section of said water flow passage is of a frustoconical shape, said seal mating with said seal section of said water flow passage.

5. The flush valve of claim 1, wherein a limiting seat is installed in the housing, a guide channel is provided on the limiting seat, the end B of the push rod passes through the guide channel, the spring is sleeved outside the push rod, and the spring is disposed between the end a of the push rod and the limiting seat.

6. The flush valve according to claim 1, wherein a sealing sleeve is arranged at the end a of the ejector rod, the sealing sleeve comprises a columnar body and an annular sealing strip arranged on the outer circumference of the body, the sealing strip is arranged in an inclined manner, and the end with the larger outer diameter of the sealing strip faces the water cavity; the pressure relief hole is formed in the body.

7. The flush valve of claim 6, wherein said sealing strip tapers toward said outer edge.

8. The flush valve of claim 6, wherein said sealing strip is disposed at one end of said body, said end of said body is provided with a support block, said sealing strip is integrally connected to said support block, and said plunger is disposed at the other end of said body.

9. The flush valve of claim 1, wherein said valve core includes

10. The flush valve of claim 1, wherein said valve core includes

A core body;

the outer edge of the sealing ring is fixed on the valve body, the inner edge of the sealing ring is fixed on the core body, the sealing section of the sealing ring is arranged on the inner bracket in the valve body, the sealing section is in sealing fit with the inner bracket, a water through hole II is formed in the sealing ring and arranged between the sealing section and the outer edge of the sealing ring, and the water through hole II is communicated with the water inlet end and the water inlet channel;