CN211408661U

CN211408661U - Inner pressure-relief anti-toppling electric kettle cover

Info

Publication number: CN211408661U
Application number: CN201922220075.1U
Authority: CN
Inventors: 赖远飞; 胡杨海; 刘润军; 李洋; 吴平
Original assignee: Hangzhou Haers Industrial Co ltd
Current assignee: Hangzhou Haers Industrial Co ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-09-04
Anticipated expiration: 2029-12-12

Abstract

The utility model discloses an electric kettle pot lid is prevented empting by interior pressure release, including pot lid body, water sealing assembly, pot lid body side is equipped with the delivery port, pot lid body lower part is equipped with the water inlet, water sealing assembly with pot lid body sliding connection and shutoff the water inlet, this internal exhaust pressure release subassembly and the backward flow subassembly of being equipped with of pot lid, exhaust pressure release subassembly are the important passageway of holding steam exhaust in the water cavity, and the backward flow subassembly has enlarged the volume of holding the water cavity, can cushion and hold water cavity inner chamber steam pressure, but steam can not remain at this internal other positions of pot lid, therefore the comdenstion water can be detached when the pot lid washs portably. The structural design mutual independence of exhaust pressure release subassembly and backward flow subassembly again with the inside isolation of pot lid, steam only circulates in exhaust passage and backward flow channel, and pot lid simple structure easily washs, thereby avoids long-term use back comdenstion water to remain and causes the health problem in the pot lid.

Description

Inner pressure-relief anti-toppling electric kettle cover

Technical Field

The utility model relates to an insulating pot especially relates to an interior pressure release is prevented empting insulating pot lid.

Background

At present, the kettle lid of the electric kettle in the market mostly adopts a sealing structure, and in order to guarantee the efficiency and the heat preservation performance of boiling water, the inside of the kettle lid is basically provided with a pressure relief air escape opening or an air exhaust opening so as to avoid the potential safety hazard caused by the overlarge internal pressure of the kettle body due to a large amount of water vapor generated during boiling water.

However, the structure of the air outlet is increased, so that water in the kettle body overflows from the air outlet after the electric kettle is poured, and a user has a risk of scalding; in the anti-toppling design of the conventional electric kettle, the anti-toppling structure is mostly designed on the kettle cover and adopts structures such as a gravity valve and a ball, so that the exhaust port is plugged under the gravity action of the structures such as the gravity valve and the ball when the kettle body is toppled, and water is prevented from flowing out of the exhaust port. However, the electric kettle adopting the structure is relatively complex in structure, steam can be filled in the whole kettle cover when water is boiled, condensed water can also cover the whole kettle cover, the inside of the kettle cover is not easy to clean, the condensed water cannot be poured out, if the electric kettle is used for a long time, residual water accumulation can be caused, and the condensed water is deteriorated and smelled, so that the electric kettle is not beneficial to long-term healthy use of the electric kettle.

Disclosure of Invention

The utility model provides a novel internal pressure relief anti-toppling electric kettle lid aiming at the defects of complex structural design, residual condensate water and the like of the exhaust pressure relief structure of the electric kettle in the prior art.

In order to solve the technical problem, the utility model discloses a following technical scheme realizes:

the utility model provides an electric kettle pot lid is prevented empting in interior pressure release, includes pot lid body, seals the water subassembly, pot lid body side is equipped with the delivery port, pot lid body lower part is equipped with the water inlet, seal the water subassembly with pot lid body sliding connection and shutoff the water inlet, pot lid body lower part is equipped with the air inlet, pot lid body lower part still is equipped with first backward flow mouth, second backward flow mouth, be equipped with on the pot lid body with the gas vent of delivery port intercommunication, this internal exhaust pressure release subassembly and the backward flow subassembly of being equipped with of pot lid, be equipped with exhaust passage in the exhaust pressure release subassembly, be equipped with backflow channel in the backflow subassembly, exhaust passage inlet end with the air inlet links to each other, exhaust passage give vent to anger the end with the gas vent is connected, backflow channel respectively with first backward flow mouth, second backward flow mouth is connected.

Among the above-mentioned pot lid structure, this internal water sealing component that is equipped with of pot lid is used for sealing the water inlet, thereby it is external to prevent that this is spilled over the pot lid that liquid gets into the water inlet when insulating pot accident is emptyd, this internal exhaust pressure release subassembly and the backward flow subassembly of being equipped with of pot lid, undertake different effects respectively, exhaust pressure release subassembly is used for holding water inner chamber and the delivery port of intercommunication kettle body, be the important route of holding steam escape in the water inner chamber, the backward flow subassembly has enlarged the volume of holding the water inner chamber, can cushion and hold water inner chamber steam pressure, the impact force to liquid when the kettle body is emptyd or is overtur. Steam in the water containing cavity enters the exhaust and pressure relief assembly from the air inlet and finally water vapor is discharged to the water outlet, when the steam passes through the exhaust and pressure relief assembly, a part of the steam is discharged out of the kettle cover body, and a part of the steam is condensed and remained in the exhaust and pressure relief assembly to form condensed water, but the steam cannot remain in other positions in the kettle cover body, so that the condensed water can be simply removed when the kettle cover is cleaned; meanwhile, a steam hole is not required to be additionally designed on the kettle cover, so that the steam hole is prevented from scalding a user. When the kettle body is toppled or turned over, liquid in the water containing inner cavity can generate impact force on the bottom of the kettle cover, and at the moment, the first return opening and the second return opening can bear most of the flow impact force. After the water vapor enters the backflow assembly, the backflow channel undergoes micro-expansion to buffer most of the vapor pressure; the structural design mutual independence of exhaust pressure release subassembly and backward flow subassembly again with the inside isolation of pot lid, steam only circulates in exhaust passage and backward flow channel, and pot lid simple structure easily washs, thereby avoids long-term use back comdenstion water to remain and causes the health problem in the pot lid.

Preferably, the electric kettle lid is prevented empting by interior pressure release, the pressure release subassembly that exhausts includes air inlet connecting portion, blast pipe, gas vent connecting portion in proper order, exhaust passage locates in the blast pipe, the air inlet with air inlet connecting portion interference fit, the gas vent connecting portion with gas vent interference fit.

Exhaust pressure release subassembly both ends respectively with air inlet, gas vent intercommunication, connect through the interference fit mode and can form the connection position that stability is good, the leakproofness is good for the blast pipe forms good leakproofness with air inlet connecting portion, gas vent connecting portion and is connected, the problem that gas leakage or breaking away from appears when avoiding the blast pipe to take place the micro-expansion.

Preferably, the ratio of the inner diameter of the exhaust pipe to the inner diameters of the exhaust port connecting part and the air inlet connecting part is R1, and R1 is more than or equal to 0.2 and less than or equal to 1.

The internal diameter less than or equal to of blast port connecting portion, air inlet connecting portion of blast pipe when steam gets into the blast pipe and makes the blast pipe take place the thermal expansion, the condition that avoids blast pipe and blast port connecting portion, air inlet connecting portion to take place gas leakage or break away from that can be better.

Preferably, the internal pressure relief anti-toppling electric kettle lid is characterized in that the exhaust pipe is wound on the kettle lid body, and the kettle lid body is provided with at least 1 limiting rib and limits the trend of the exhaust pipe through the limiting rib.

The trend of blast pipe is injectd on locating the pot lid body and through spacing muscle to the blast pipe, and great aversion, winding situation appear in the blast pipe when can avoiding steam to get into the blast pipe.

Preferably, the electric kettle cover with the internal pressure relief and the anti-toppling function is provided with 5 limiting ribs.

When spacing muscle quantity reached 5, it is more reasonable to make the trend setting of blast pipe through rationally arranging spacing muscle, can not touch each other between the pipe wall to the blast pipe can form the crooked ability reinforcing that makes blast pipe buffering steam pressure of many places.

Preferably, the internal pressure relief anti-toppling electric kettle lid comprises a first backflow connecting part, a backflow pipe and a second backflow connecting part, wherein the backflow component comprises the first backflow connecting part, the backflow pipe and the second backflow connecting part in sequence, the backflow channel is arranged in the backflow pipe, the first backflow connecting part is in interference fit with the first backflow port, and the second backflow connecting part is in interference fit with the second backflow port.

The both ends of backward flow subassembly all are linked together with holding the water inner chamber, through first backward flow connecting portion and first backward flow mouth, the interference fit of second backward flow connecting portion and second backward flow mouth, can form the excellent cooperation of stability and leakproofness, it is originally internal if the leakproofness of junction can lead to steam to get into the pot lid, and cause liquid to flow this internal other structures department of pot lid, the situation that appears back flow and first backward flow mouth or second backward flow mouth and break away from when consequently adopting foretell connected mode can avoid steam to get into the back flow.

Preferably, in the electric kettle lid with the internal pressure relief and the anti-toppling function, the ratio of the inner diameter of the return pipe to the inner diameters of the first return connecting part and the second return connecting part is R2, and R2 is more than or equal to 0.2 and less than or equal to 1.

First backward flow connecting portion, second backward flow connecting portion are used for communicating pot lid body, when the kettle body is emptyd or is invertd, hold the liquid impact first backward flow connecting portion of water inner chamber, second backward flow connecting portion, get into the back flow afterwards and make the back flow take place the micro-expansion, the internal diameter less than or equal to first backward flow connecting portion of back flow, the internal diameter of second backward flow connecting portion, the back flow takes place the micro-expansion when can avoid liquid to get into the back flow better and causes back flow and first backward flow connecting portion, the circumstances of revealing or breaking away from takes place for second backward flow connecting portion.

Preferably, in the electric kettle lid with the internal pressure relief and the anti-toppling function, the ratio of the inner diameter of the return pipe to the inner diameter of the exhaust pipe is R3, wherein 1< R3 is less than or equal to 5; the ratio of the pipe wall thickness of the return pipe to the pipe wall thickness of the exhaust pipe is R4, and R4 is more than or equal to 0.3 and less than 1.

The exhaust and pressure relief assembly and the backflow assembly respectively play different roles when in use, the requirements on the inner diameter and the pipe wall thickness of the exhaust and pressure relief assembly and the backflow assembly need to be made, most of liquid needs to be contained in the backflow pipe when the backflow pipe is dumped, so that the inner diameter is designed to be relatively larger, and the liquid can firstly flow into the backflow pipe with the large inner diameter when the kettle is dumped or overturned; the exhaust pipe is directly communicated with the exhaust port, so that liquid can be prevented from flowing out of the exhaust channel when the kettle is dumped or overturned, and the inner diameter of the exhaust pipe is designed to be relatively small; meanwhile, the exhaust pipe is directly contacted with steam to play a main role of pressure relief, so that the condition that cracks occur due to overlarge expansion of the inner diameter of the exhaust pipe under the action of steam pressure is avoided, the thickness of the pipe wall of the exhaust pipe is relatively thick and used for buffering the steam pressure, the thickness of the inner diameter of the return pipe is relatively thin, and when the steam is boosted, the gas firstly enters the return pipe to be thermally expanded to buffer partial steam pressure.

Preferably, the inner pressure-relief anti-toppling electric kettle cover is characterized in that the exhaust pressure-relief assembly and the backflow assembly are made of food-grade silica gel or food-grade plastic.

When designing exhaust pressure release subassembly and backward flow subassembly, consider that blast pipe and back flow need simplify structure and integrated into one piece, processing manufacturing convenience, consequently choose food level silica gel or food level plastic of easily buckling, elasticity and toughness preferred for use, both satisfied the functional design of above-mentioned structure, guarantee the healthy use of insulating pot again.

Preferably, the internal pressure relief anti-toppling electric kettle lid comprises an umbrella cap, a switch unit and an elastic mechanism, wherein the upper part of the elastic mechanism is abutted against the switch unit, the lower part of the elastic mechanism is abutted against the umbrella cap, the switch unit limits the vertical sliding stroke of the umbrella cap through the elastic mechanism, the umbrella cap is matched with the water inlet, and the umbrella cap is provided with a sealing ring and blocks the water inlet through the sealing ring.

The water sealing assembly is used for sealing a water inlet, the water containing inner cavity and the pot lid body are separated, and the structural design of the umbrella cap, the switch unit and the elastic mechanism is adopted, so that the water sealing assembly is simpler in structure, higher in practicability, and simpler and more convenient to operate when a user pours water.

Compared with the prior art, after the technical scheme is adopted, the utility model discloses following beneficial effect has:

1. when the electric kettle is heated, water vapor can only be discharged out of the kettle body through the arranged exhaust channel, the exhaust channel is isolated from the interior of the kettle cover body, and the water vapor cannot directly enter the cavity of the kettle cover body, so that the steam can be prevented from being condensed and remained in the kettle cover body, and the problems of condensed water and clean and healthy drinking water are solved;

2. in the prior art, the exhaust holes are mostly arranged at the handle position, so that hands are easy to scald when the kettle is used, and by adopting the structural design, the exhaust and pressure relief assembly is communicated with the water containing inner cavity and the water outlet, so that water vapor in the kettle is uniformly exhausted from the water outlet, and the exhaust holes do not need to be additionally arranged on the kettle cover body, so that the problem of scalding hands when the kettle is used is avoided, the kettle cover is simpler in structure and higher in practicability, and the operation habit of a user is better met;

3. after the electric kettle is boiled, the exhaust and pressure relief component can effectively exhaust and relieve pressure due to a large amount of pressure generated by hot steam in the water containing cavity, and a large amount of hot water cannot splash from the water outlet after the electric kettle is boiled; when the kettle body is toppled, the liquid level is filled in the return pipe, the capacity of the water containing inner cavity is additionally increased, the thermal shock of liquid is relieved, the thermal shock of the liquid can be delayed due to the winding structure design of the exhaust pipe, the problem that hot water in the kettle overflows when toppling is further solved, and therefore the inner pressure relief and anti-toppling functions of the electric kettle can be achieved by adopting the structure.

Drawings

Fig. 1 is a first cross-sectional view of the present invention;

FIG. 2 is a second cross-sectional view of the present invention;

FIG. 3 is a top view of the present invention in use;

fig. 4 is a cross-sectional view of the present invention in use.

Detailed Description

The invention will be described in further detail with reference to the accompanying drawings 1-4 and the detailed description, which are not intended to limit the invention:

example 1

An electric kettle lid capable of preventing internal pressure release and toppling comprises a kettle lid body 1 and a water sealing assembly 2, wherein a water outlet 14 is arranged on the side face of the kettle lid body 1, a water inlet 13 is arranged on the lower portion of the kettle lid body 1, the water sealing assembly 2 is in sliding connection with and seals the water inlet 13 through the kettle lid body 1, an air inlet 11 is arranged on the lower portion of the kettle lid body 1, a first backflow port 12 and a second backflow port 16 are further arranged on the lower portion of the kettle lid body 1, an air outlet 15 communicated with the water outlet 14 is arranged on the kettle lid body 1, an exhaust pressure relief assembly 5 and a backflow assembly 4 are arranged in the kettle lid body 1, an exhaust channel 51 is arranged in the exhaust pressure relief assembly 5, a backflow channel 41 is arranged in the backflow assembly 4, the air inlet end of the exhaust channel 51 is connected with the air inlet 11, the air outlet end of the exhaust channel 51 is connected with the air outlet 15, and the backflow channel, The second return port 16 is connected.

As shown in fig. 1 to 4, in an unopened state, the water sealing assembly 2 is disposed between the pot lid body 1 and the water containing cavity 8, so that the liquid in the water containing cavity 8 cannot be poured out from the water inlet 13; in the process of heating the electric kettle, the water containing inner cavity 8 is gradually heated and pressurized, a part of steam slowly enters the backflow channel 41 and fills the backflow component 4 to cause thermal expansion, and a part of steam enters the exhaust channel 51 of the exhaust and pressure relief component 5 from the air inlet 11 and is exhausted out of the kettle cover body 1 from the water outlet 14, so that the exhaust and pressure relief functions of the electric kettle are realized; when the kettle body is dumped or turned over, the liquid in the water containing inner cavity 8 can generate impact force to the bottom of the kettle cover body 1, most of flow impact force can be born by the first return port 12 and the second return port 16 at the moment, after the liquid enters the return assembly 4, the return channel 41 undergoes micro-expansion, most of flow impact force is buffered, the problem that the liquid directly overflows from the water outlet 14 when being dumped is solved, and the function that the electric kettle is prevented from being dumped is realized.

Preferably, the exhaust and pressure relief assembly 5 sequentially comprises an air inlet connecting part 54, an exhaust pipe 52 and an exhaust port connecting part 53, the exhaust channel 51 is arranged in the exhaust pipe 52, the air inlet 11 is in interference fit with the air inlet connecting part 54, and the exhaust port connecting part 53 is in interference fit with the exhaust port 15.

Preferably, the ratio of the inner diameter of the exhaust pipe 52 to the inner diameters of the exhaust port connection portion 53 and the intake port connection portion 54 is R1, and R1 is 0.2. ltoreq.1.

Preferably, the exhaust pipe 52 is wound on the pot lid body 1, and at least 1 limiting rib 17 is arranged on the pot lid body 1 and the trend of the exhaust pipe 52 is limited by the limiting rib 17.

Preferably, the number of the limiting ribs 17 is 5.

Preferably, the backflow component 4 sequentially includes a first backflow connecting portion 43, a backflow pipe 42, and a second backflow connecting portion 44, the backflow channel 41 is disposed in the backflow pipe 42, the first backflow connecting portion 43 is in interference fit with the first backflow port 12, and the second backflow connecting portion 44 is in interference fit with the second backflow port 16.

Preferably, the ratio of the inner diameter of the return pipe 42 to the inner diameters of the first return connection part 43 and the second return connection part 44 is R2, and R2 is 0.2. ltoreq.1.

Preferably, the ratio of the inner diameter of the return pipe 42 to the inner diameter of the exhaust pipe 52 is R3, 1< R3 ≦ 5; the ratio of the wall thickness of the return pipe 42 to the wall thickness of the exhaust pipe 52 is R4, R4 is 0.3-1.

Preferably, the exhaust and pressure relief assembly 5 and the backflow assembly 4 are made of food-grade silica gel or food-grade plastic.

Preferably, the water sealing assembly 2 comprises an umbrella cap 6, a switch unit 3 and an elastic mechanism 7, the upper part of the elastic mechanism 7 is abutted against the switch unit 3, the lower part of the elastic mechanism 7 is abutted against the umbrella cap 6, the switch unit 3 limits the vertical sliding stroke of the umbrella cap 6 through the elastic mechanism 7, the umbrella cap 6 is matched with the water inlet 13, and the umbrella cap 6 is provided with a sealing ring 61 and blocks the water inlet 13 through the sealing ring 61.

Specifically, as shown in fig. 1 to 4, when the electric kettle is not opened, the water inlet 13 of the kettle cover body 1 is blocked by the water sealing component 2, the umbrella cap 6 and the sealing ring 61 separate the liquid in the water containing cavity 8 from the water inlet 13, and at this time, the liquid cannot be poured out from the water outlet 14 when a user tilts the kettle body to pour water; when a user needs to start the electric kettle, firstly, the switch unit 3 is pressed, the switch unit 3 drives the umbrella cap 6 to slide downwards, the water inlet 13 is communicated with the water containing inner cavity 8, and at the moment, the user inclines the kettle body to pour water, and liquid is poured out from the water outlet 14.

When heating the electric kettle, heat up gradually in the water holding inner chamber 8, boost, some steam gets into backward flow subassembly 4 and makes the back flow 42 take place the thermal expansion and cushion partly hot pressure, some steam gets into exhaust pressure release subassembly 5 and makes blast pipe 52 take place the thermal expansion, steam is through around the blast pipe 52 of establishing, some gets into gas vent 15, delivery port 14, thereby outside discharge pot lid body 1, some steam condenses into the comdenstion water in exhaust passage 51, exhaust passage 51 and the inside isolation of pot lid body 1, steam can not directly get into in the cavity of pot lid body 1, can avoid steam to condense in pot lid body 1 and remain, the problem of comdenstion water has both been solved, the clean healthy problem of drinking water has been solved again.

When the kettle body is accidentally dumped or overturned, liquid in the water containing inner cavity 8 can generate impact force on the bottom of the kettle cover body 1, part of the liquid can impact the first backflow port 12 and the second backflow port 16, the flowing liquid fills the backflow pipe 42 and enables the backflow pipe 42 to slightly expand, most of flowing impact force is relieved, the liquid flows back to the water containing inner cavity 8 after the impact force is relieved, a small part of the liquid can impact the air inlet 11, and then the flowing liquid enters the exhaust pipe 52, and the winding trend design and the inner diameter of the exhaust pipe 52 are smaller than those of the backflow pipe 42, so that part of the liquid entering the exhaust pipe 52 can be left in the exhaust pipe 52 and is not easy to overflow, the internal pressure relief and anti-overturning functions of the electric kettle can be realized by adopting the structure, and the drinking water health problem is also solved.

In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.

Claims

1. The utility model provides an electric kettle pot lid is prevented empting in interior pressure release, includes pot lid body (1), seals water subassembly (2), pot lid body (1) side is equipped with delivery port (14), pot lid body (1) lower part is equipped with water inlet (13), seal water subassembly (2) with pot lid body (1) sliding connection and shutoff water inlet (13), pot lid body (1) lower part is equipped with air inlet (11), its characterized in that: kettle lid body (1) lower part still is equipped with first backward flow mouth (12), second backward flow mouth (16), be equipped with on kettle lid body (1) with gas vent (15) of delivery port (14) intercommunication, be equipped with exhaust pressure release subassembly (5) and backward flow subassembly (4) in kettle lid body (1), be equipped with exhaust passage (51) in exhaust pressure release subassembly (5), be equipped with backflow channel (41) in backflow subassembly (4), exhaust passage (51) inlet end with air inlet (11) link to each other, exhaust passage (51) give vent to anger the end with gas vent (15) are connected, backflow channel (41) respectively with first backward flow mouth (12), second backward flow mouth (16) are connected.

2. The internal pressure relief anti-toppling electric kettle cover as claimed in claim 1, wherein: exhaust pressure release subassembly (5) include air inlet connecting portion (54), blast pipe (52), gas vent connecting portion (53) in proper order, exhaust passage (51) are located in blast pipe (52), air inlet (11) with air inlet connecting portion (54) interference fit, gas vent connecting portion (53) with gas vent (15) interference fit.

3. The internal pressure relief anti-toppling electric kettle cover as claimed in claim 2, wherein: the ratio of the inner diameter of the exhaust pipe (52) to the inner diameters of the exhaust port connecting part (53) and the air inlet connecting part (54) is R1, and R1 is not less than 0.2 and not more than 1.

4. The internal pressure relief anti-toppling electric kettle cover as claimed in claim 2, wherein: the exhaust pipe (52) is wound on the pot lid body (1), at least 1 limiting rib (17) is arranged on the pot lid body (1), and the trend of the exhaust pipe (52) is limited by the limiting rib (17).

5. The internal pressure relief anti-toppling electric kettle cover as claimed in claim 4, wherein: the number of the limiting ribs (17) is 5.

6. The internal pressure relief anti-toppling electric kettle cover as claimed in claim 2, wherein: backflow component (4) include first backward flow connecting portion (43), back flow (42), second backward flow connecting portion (44) in proper order, return passage (41) are located in back flow (42), first backward flow connecting portion (43) with first backward flow mouth (12) interference fit, second backward flow connecting portion (44) with second backward flow mouth (16) interference fit.

7. The internal pressure relief anti-toppling electric kettle cover as claimed in claim 6, wherein: the ratio of the inner diameter of the return pipe (42) to the inner diameters of the first return connection part (43) and the second return connection part (44) is R2, and R2 is more than or equal to 0.2 and less than or equal to 1.

8. The internal pressure relief anti-toppling electric kettle cover as claimed in claim 6, wherein: the ratio of the inner diameter of the return pipe (42) to the inner diameter of the exhaust pipe (52) is R3, 1< R3 is less than or equal to 5; the ratio of the pipe wall thickness of the return pipe (42) to the pipe wall thickness of the exhaust pipe (52) is R4, and R4 is more than or equal to 0.3 and less than 1.

9. The internal pressure relief anti-toppling electric kettle cover as claimed in claim 1, wherein: the exhaust and pressure relief assembly (5) and the backflow assembly (4) are made of food-grade silica gel or food-grade plastic.

10. The internal pressure relief anti-toppling electric kettle cover as claimed in claim 1, wherein: seal water subassembly (2) including umbrella hat (6), switch unit (3), elastic mechanism (7) upper portion with switch unit (3) are inconsistent, elastic mechanism (7) lower part with umbrella hat (6) are inconsistent, switch unit (3) are passed through elastic mechanism (7) are injectd the vertical slip stroke of umbrella hat (6), umbrella hat (6) with water inlet (13) cooperate, be equipped with sealing washer (61) on umbrella hat (6) and pass through sealing washer (61) shutoff water inlet (13).