WO2017185373A1

WO2017185373A1 - Pressure accumulation sealing mechanism and nozzle apparatus

Info

Publication number: WO2017185373A1
Application number: PCT/CN2016/080807
Authority: WO
Inventors: 吴晓龙; 吴旭民; 金峙良; 周乐; 卢绰莹
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2016-04-29
Filing date: 2016-04-29
Publication date: 2017-11-02
Also published as: CN107466252A; CN107466252B

Abstract

A pressure accumulation sealing mechanism, comprising a liquid inlet (202), a liquid outlet (204), and a valve core (60) arranged between the liquid inlet (202) and the liquid outlet (204), the valve core (60) being an integrally formed structure and being capable of elastic deformation; the valve core (60) seals the liquid inlet (202), and when the liquid pressure of the liquid inlet (202) reaches a predetermined value, the valve core (60) produces elastic deformation in order to release the seal of the liquid inlet (202). Also relating to a nozzle apparatus provided with said pressure accumulation sealing mechanism.

Description

Pressure storage sealing mechanism and nozzle device

Technical field

The present invention relates to a pressure accumulating sealing mechanism and a head device having the pressure accumulating sealing mechanism.

Background technique

The spraying system is used for spraying pesticides, fertilizers, water and other liquids in agricultural production, plant protection and other fields. A spray head device mounted at the end of the spray system tubing is used to spray liquid onto the surface of the crop. The valve core of the existing nozzle device is composed of a plurality of components, and the structure is relatively complicated, and the assembly between the components is improper due to aging of the components during use, thereby making the nozzle device less reliable.

Summary of the invention

In view of the above, it is necessary to provide a pressure accumulating sealing mechanism that solves the above problems and a head device including the pressure accumulating sealing mechanism.

An accumulator sealing mechanism includes a liquid inlet, a liquid outlet, and a valve core disposed between the liquid inlet and the liquid outlet, wherein the valve core is an integrally formed structure, and Ability to undergo elastic deformation;

Wherein, the valve core seals the liquid inlet, and when the hydraulic pressure of the liquid inlet reaches a predetermined value, the valve core is elastically deformed to release the sealing of the liquid inlet.

A nozzle device comprising:

The pressure storage sealing mechanism includes a liquid inlet, a liquid outlet, and a valve core disposed between the liquid inlet and the liquid outlet, the valve core is an integrally formed structure, and can be elastically deformed. The valve core seals the liquid inlet, and when the hydraulic pressure of the liquid inlet reaches a predetermined value, the valve core is elastically deformed to release the sealing of the liquid inlet;

A nozzle mechanism is coupled to the pressure accumulating sealing mechanism, and the nozzle mechanism is in communication with the liquid outlet.

Compared with the prior art, the pressure storage sealing mechanism and the nozzle device provided by the present invention, because the valve core of the pressure storage sealing mechanism is an integral molding mechanism, the valve core seals the liquid inlet, and can be in the When the hydraulic pressure of the liquid port reaches a predetermined value, the elastic deformation is released to seal the liquid inlet, and the structure is simpler than the valve core composed of the valve stem and the spring, thereby simplifying the structure of the pressure storage sealing mechanism and the nozzle device. When the valve core is formed in combination in the prior art, the reliability of the pressure storage sealing mechanism and the nozzle device is low due to improper matching between the valve core components due to aging.

DRAWINGS

1 is an exploded view of a showerhead apparatus according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view showing a cutting position of the head unit in a sealed state according to an embodiment of the present invention.

3 is a cross-sectional view showing another cutting position of the head device in a sealed state according to an embodiment of the present invention, the cutting position passing through the liquid outlet of the head device.

Figure 4 is a half cross-sectional view of the spool of Figure 1.

Fig. 5 is a view showing a state of conduction of the head device shown in Fig. 2;

Main component symbol description

Nozzle device 100

Pressure storage sealing mechanism 10

Nozzle mechanism 70

Pipe structure 20

Spool 60

Runner 201

Inlet port (valve port) 202

Spool mounting portion 203

Liquid outlet 204

Bonnet 30

Valve housing 40

Seal 50

Incoming end 31

Outflow end 33

First inner sleeve 331

First outer sleeve 335

Connection surface 336

Internal thread 337

Liquid inlet 41

Liquid outlet 43

Second inner sleeve 411

Second outer sleeve 415

External thread 416

Positioning boss 417

First locking structure 431

Sealing part 61

Elastic part 64

Connection 67

Diversion section 68

Cavity 69

Sealing surface 611

Accumulator chamber 101

Second locking structure 71

Filter 72

The invention will be further illustrated by the following detailed description in conjunction with the accompanying drawings.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or the component can be present. When a component is considered to "connect" another component, it can be directly connected to another component or possibly a central component. When a component is considered to be "set to" another component, it can be placed directly on another component or possibly with a centered component.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. The terminology used in the description of the present invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The features of the embodiments and examples described below can be combined with each other without conflict.

Referring to FIG. 1 , a shower head device 100 according to an embodiment of the present invention includes a pressure accumulation sealing mechanism 10 and a nozzle mechanism 70 . The nozzle mechanism 70 is coupled to the pressure accumulation sealing mechanism 10.

Referring to FIG. 1 and FIG. 2 together, the pressure accumulating sealing mechanism 10 includes a pipe structure 20 and a valve core 60. The spool is disposed inside the duct structure 20.

The pipe structure 20 is provided with a flow passage 201, a liquid inlet port (valve port) 202, a valve core mounting portion 203, and a liquid outlet port 204. The liquid inlet port (valve port) 202 and the liquid outlet port 204 are both located in the flow channel 201 and are both in communication with the flow channel 201. The spool mounting portion 203 is located inside the duct structure 20.

The duct structure 20 includes a valve cover 30, a valve housing 40, and a seal ring 50. The valve cover 30 and the valve housing 40 are connected to each other. The seal ring 50 is used to seal the connection of the valve cover 30 and the valve housing 40. The liquid inlet (valve port) 202 is opened on the valve cover 30. The liquid outlet 204 is opened on the valve casing 40.

Referring to FIG. 2 and FIG. 3 together, in the embodiment, the valve cover 30 is substantially L-shaped. The valve cover 30 is a hollow tubular structure. The valve cover 30 includes an inflow end 31 and an outflow end 33. The inflow end 31 is substantially perpendicularly connected to the outflow end 33. The inflow end 31 can be connected to a liquid storage device (not shown) and its interior communicates with the interior of the liquid storage device.

It can be understood that in other embodiments, the inflow end 31 and the outflow end 33 may be connected in a straight line, or any other suitable angle connection, or a curved connection of any shape.

The outflow end 33 includes a first inner sleeve 331 and a first outer sleeve 335. The first inner sleeve 331 is disposed in the first outer sleeve 335 and communicates with the inflow end 31. In the present embodiment, the first outer sleeve 335 is coupled to the outer wall of the first inner sleeve 331. Preferably, the first outer sleeve 335 is disposed coaxially with the first inner sleeve 331.

In the illustrated embodiment, the first outer sleeve 335 internally forms a two-stage stepped structure. An aperture of the first outer sleeve 335 adjacent to one end of the first inner sleeve 331 is smaller than an end thereof away from the first inner sleeve 331 (ie, the free end of the first outer sleeve 335) Aperture. The first outer sleeve 335 includes a connecting surface 336 that is coupled between two stages of stepped structures. In the present embodiment, the inner wall of the free end of the first outer sleeve 335 is formed with an internal thread 337. In the present embodiment, the liquid inlet (valve port) 202 is opened at an end of the first inner sleeve 331.

It can be understood that in other embodiments, the first outer sleeve 335 may have a multi-step structure inside.

The valve housing 40 is coupled to the valve cover 30. The valve casing 40 has a substantially hollow tubular structure inside, and includes a liquid inlet end 41 and a liquid outlet end 43.

The liquid inlet end 41 includes a second inner sleeve 411 and a second outer sleeve 415. The second inner sleeve 411 is disposed inside the second outer sleeve 415. In the illustrated embodiment, one end of the second outer sleeve 415 is coupled to the outer wall of the second inner sleeve 411. Preferably, the second inner sleeve 411 is disposed coaxially with the second outer sleeve 415. In this embodiment, the valve core mounting portion 203 is disposed at an end of the second inner sleeve 411, and the liquid outlet 204 is opened in the second outer sleeve 415 and the second inner sleeve Between 411. The liquid outlet 204 is connected to the liquid discharge end 43. It can be understood that in other embodiments, the liquid outlet 204 can also be opened on the second inner sleeve 411.

The valve housing 40 and the valve cover 30 are interconnected by a cooperation of the second outer sleeve 415 and the first outer sleeve 335. In this embodiment, the outer wall of the second outer sleeve 415 is provided with an external thread 416 that cooperates with the internal thread 337.

It can be understood that in other embodiments, the free end of the first outer sleeve 335 is externally provided with an external thread, and the inner portion of the second outer sleeve 415 is provided with an internal thread that cooperates with the external thread.

It can be understood that in other embodiments, the first outer sleeve 335 and the second outer sleeve 415 can also be fastened and fixed.

A positioning boss 417 is disposed at an end of the second outer sleeve 415 away from the second inner sleeve 411. In this embodiment, the outer diameter of the positioning boss 417 gradually decreases as the distance between the second outer sleeve 415 increases.

The liquid discharge end 43 and the liquid inlet end 41 communicate with each other. The outer wall of the liquid outlet end 43 is provided with a first locking structure 431.

The seal ring 50 is fixed between the valve cover 30 and the valve housing 40 for sealing the connection of the valve cover 30 and the valve housing 40. In the embodiment, the sealing ring 50 is clamped between the positioning boss 417 and the connecting surface 336 of the step structure for sealing the first outer sleeve 335 and the second outer sleeve. The junction of 415. It can be understood that in other embodiments, the sealing ring 50 can be omitted.

Referring to FIG. 2 to FIG. 4 together, the valve body 60 is installed in the flow channel 201 and disposed between the liquid inlet port (valve port) 202 and the liquid outlet port 204. In the present embodiment, the valve body 60 is mounted on the valve housing 40. Specifically, the spool 60 is detachably connected to the spool mounting portion 203 at the end of the second inner sleeve 411 for controlling opening and closing of the liquid inlet (valve port) 202. .

Referring to FIG. 2, FIG. 3 and FIG. 5, in particular, in the illustrated embodiment, the second inner sleeve 411 is spaced apart from the second outer sleeve 415, so that the second inner sleeve 411 An annular groove is formed with the second outer sleeve 415. The spool 60 is mounted within the second inner sleeve 411. The bottom of the annular groove or/and the inner wall of the second inner sleeve 411 are provided with a flow hole. The liquid first passes through the second inner sleeve 411, and after the valve core 60 is opened, flows into the annular groove to be branched, and then flows into the liquid outlet 204 through the overflow hole to perform confluence.

When the water pump (not shown) communicating with the flow path 201 stops working, the hydraulic pressure in the flow path 201 gradually decreases until the hydraulic pressure of the annular groove is greater than the hydraulic pressure of the flow path 201, and the liquid of the annular groove The elastic portion 60 of the spool 20 is squeezed such that the spool 20 again seals the valve port 202 such that the nozzle does not leak after the pump is stopped.

In the present embodiment, the valve body 60 is an integrally formed structure and is elastically deformable. The valve body 60 is elastically abutted with the first inner sleeve 331. The spool 60 seals the inlet port (valve port) 202, and when the hydraulic pressure of the inlet port (valve port) 202 reaches a predetermined value, the spool 60 is elastically deformed to release the The seal of the liquid port. In the present embodiment, the valve body 60 is made of an elastic resin material such as rubber or silica gel.

Referring to FIG. 4 , the valve body 60 includes a sealing portion 61 , an elastic portion 64 , a connecting portion 67 , and a flow guiding portion 68 . The elastic portion 64 is connected between the sealing portion 61 and the connecting portion 67.

The sealing portion 61 includes a sealing surface 611 that faces away from the connecting portion 67. The sealing surface 611 elastically abuts the end of the first inner sleeve 331 to achieve sealing and conduction to the first inner sleeve 331.

The elastic portion 64 is coupled to the sealing portion 61. The elastic portion 64 can pre-tension the sealing portion 61 against the liquid inlet port (valve port) 202 such that the sealing portion 61 seals the liquid inlet port (valve port) 202. When the hydraulic pressure of the liquid inlet port (valve port) 202 reaches a predetermined value, the sealing portion 61 presses the elastic portion 64 to elastically deform the elastic portion 64 to release the liquid inlet port (valve port) ) 202 seal.

The elastic portion 64 may be recessed, convex or multi-stage curved along a vertical direction of the axial direction of the valve body 60. In the present embodiment, the elastic portion 64 is recessed toward the inside of the valve body 60 in the vertical direction in the axial direction of the valve body 60. The elastic portion 64 and the sealing portion 61 together form a hollow cavity to facilitate elastic deformation of the elastic portion 64.

The connecting portion 67 is connected to an end of the elastic portion 64 away from the sealing portion 61. The connecting portion 67 is for detachably connecting the valve housing 40 to mount the spool 60 on the valve housing 40. In the present embodiment, the connecting portion 67 is an engaging portion. The valve housing 40 is provided with a fitting portion that is engaged with the engaging portion. In the present embodiment, the valve body mounting portion 203 is a fitting portion that is engaged with the engaging portion. In the illustrated embodiment, the connecting portion 67 is detachably coupled to the second inner sleeve 411. The connecting portion 67 is an annular snap structure.

The flow guiding portion 68 protrudes from the sealing portion 61 in a direction away from the elastic portion 64. The flow guiding portion 68 protrudes into the liquid inlet port (valve port) 202. In the embodiment of the drawing, the flow guiding portion 68 protrudes from the middle of the sealing surface 611. The flow guiding portion 68 has a substantially conical or frustum shape. The diameter of the flow guiding portion 68 gradually decreases as the distance from the sealing surface 611 increases.

In the present embodiment, the valve body 60 has a cylindrical structure. One end of the cylindrical structure is closed to form the sealing portion 61. The side wall of the cylindrical structure forms the elastic portion 64. The other end of the cylindrical structure is open to form the connecting portion 67. The central portion of the end surface of the closed end of the cylindrical structure protrudes outward to form the flow guiding portion 68.

The first outer sleeve 335, the second outer sleeve 415, the sealing ring 50, the first inner sleeve 331, the second inner sleeve 411 and the elastic portion of the valve body 60 64 collectively encloses an accumulator chamber 101. The pressure accumulating chamber 101 communicates with the liquid outlet end 43 of the valve casing 40 through the liquid outlet 204.

It can be understood that in other embodiments, the liquid outlet 204 may also be an opening that is opened on the elastic portion 64 or the connecting portion 67 of the valve body 60. The pressure accumulating chamber 101 communicates with the liquid discharge end 43 of the valve casing 40 through an opening formed in the elastic portion 64 or the connecting portion 67 of the valve body 60.

The nozzle mechanism 70 is fixed to an end of the valve housing 40 away from the valve cover 30. That is, the nozzle mechanism 70 is fixed to the liquid discharge end 43 of the valve casing 40. In the present embodiment, the nozzle mechanism 70 is fixed to the valve housing 40 by a tightening lock. Specifically, the nozzle mechanism 70 includes a second locking structure 71. The second locking structure 71 cooperates with the first locking structure 431 to fix the nozzle mechanism 70 to the liquid outlet end 43 of the valve housing 40. A filter screen 72 is disposed on the nozzle mechanism 70. The screen 72 projects into the valve housing 40.

Referring to FIG. 3 and FIG. 5 together, when the hydraulic pressure in the first inner sleeve 331 of the valve cover 30 is less than a predetermined value, the elastic portion 64 of the valve core 60 will seal the sealing portion 61. Sealing surface 611 is pre-tensioned against the end of the first inner sleeve 331 to seal the liquid inlet (valve port) 202; when in the first inner sleeve 331 of the valve cover 30 When the hydraulic pressure reaches the predetermined value, the elastic portion 64 of the valve body 60 is elastically deformed, and the sealing surface 611 of the sealing portion 61 of the valve body 60 is separated from the end portion of the first inner sleeve 331, thereby releasing The sealing surface 611 of the sealing portion 61 seals the liquid inlet port (valve port) 202 such that the first inner sleeve 331 and the pressure accumulating chamber 101 are electrically connected. In the present embodiment, the predetermined value is a minimum hydraulic pressure that separates the sealing surface 611 of the sealing portion 61 from the first inner sleeve 331.

It will be apparent to those skilled in the art that various changes and modifications can be made in accordance with the technical concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.

Claims

An accumulator sealing mechanism includes a liquid inlet, a liquid outlet, and a valve core disposed between the liquid inlet and the liquid outlet, wherein the valve core is an integrally formed structure, and Ability to undergo elastic deformation;

Wherein, the valve core seals the liquid inlet, and when the hydraulic pressure of the liquid inlet reaches a predetermined value, the valve core is elastically deformed to release the sealing of the liquid inlet.
The pressure accumulation sealing mechanism according to claim 1, wherein the valve body includes a sealing portion and an elastic portion connected to the sealing portion, and the elastic portion can pre-tension the sealing portion against the a liquid inlet, the sealing portion sealing the liquid inlet;

Wherein, when the hydraulic pressure of the liquid inlet reaches a predetermined value, the sealing portion presses the elastic portion to elastically deform the elastic portion to release the sealing of the liquid inlet.
The pressure accumulating sealing mechanism according to claim 2, wherein the valve body further includes a flow guiding portion that protrudes from the sealing portion into the liquid inlet.
The pressure accumulating sealing mechanism according to claim 3, wherein a diameter of the flow guiding portion gradually decreases as a distance from the sealing portion increases.
The pressure accumulating sealing mechanism according to claim 3, wherein the flow guiding portion has a tapered shape or a truncated cone shape.
The pressure accumulating sealing mechanism according to claim 2, wherein the sealing portion and the elastic portion together define a hollow cavity.
The pressure accumulating sealing mechanism according to claim 2, wherein the elastic portion is recessed, convex or multi-stage curved in a vertical direction of the axial direction of the valve body.
The pressure accumulating sealing mechanism according to claim 2, wherein the pressure accumulating sealing mechanism further comprises a valve cover, and the liquid inlet is provided in the valve cover.
The pressure accumulating sealing mechanism according to claim 8, wherein said pressure accumulating sealing mechanism further comprises a valve casing connected to said valve cover, said liquid discharge opening being formed on said valve casing, said valve A core is mounted on the valve housing.
The pressure accumulating sealing mechanism according to claim 9, wherein said pressure accumulating sealing mechanism further comprises a sealing ring fixed to a joint of said valve cover and said valve casing.
The pressure accumulating sealing mechanism according to claim 9, wherein said valve cover includes a first outer sleeve, said valve housing includes a second outer sleeve, said valve cover and said valve housing pass said The mating of the first outer sleeve and the second outer sleeve are interconnected.
The pressure accumulating sealing mechanism according to claim 11, wherein the first outer sleeve and the second outer sleeve are screwed or fastened.
The pressure storage sealing mechanism according to claim 11, wherein said valve housing comprises a second inner sleeve located in said second outer sleeve, said valve core being fixed to said second inner sleeve on.
The pressure accumulating sealing mechanism according to claim 13, wherein said second inner sleeve is disposed coaxially with said second outer sleeve.
The pressure accumulating sealing mechanism according to claim 13, wherein said liquid outlet is opened on said second inner sleeve.
The pressure storage sealing mechanism according to claim 15, wherein the valve cover further comprises a first inner sleeve located in the first outer sleeve, and the liquid inlet opening is opened in the first inner portion The end of the sleeve.
The pressure accumulating sealing mechanism according to claim 16, wherein said first inner sleeve is disposed coaxially with said first outer sleeve.
The pressure storage sealing mechanism according to claim 16, wherein one end of the first outer sleeve is connected to an outer wall of the first inner sleeve, and one end of the second outer sleeve is connected to the An outer wall of the second inner sleeve, the free end of the first outer sleeve being screwed or fastened to the free end of the second outer sleeve.
The pressure accumulating sealing mechanism according to claim 18, wherein an inner end of the free end of the first outer sleeve is provided with an internal thread, and an outer portion of the second outer sleeve is provided with the inner thread. External thread.
The pressure accumulating sealing mechanism according to claim 18, wherein the end of the second outer sleeve is provided with a positioning boss.
The pressure accumulating sealing mechanism according to claim 20, wherein a stepped structure is formed inside the first outer sleeve, and a seal ring is sandwiched between the stepped structure and the positioning boss.
The pressure storage sealing mechanism according to claim 21, wherein said first outer sleeve, said seal ring, said second outer sleeve, said first inner sleeve, said second inner sleeve, and said valve The cores are enclosed by a pressure accumulating chamber.
The pressure accumulating sealing mechanism according to claim 22, wherein the liquid outlet is opened between the second outer sleeve and the second inner sleeve.
The pressure accumulating sealing mechanism according to claim 9, wherein the valve body further includes a connecting portion connected to one end of the elastic portion away from the sealing portion, the connecting portion being for being compatible with the valve housing Disassemble the connection.
The pressure accumulation sealing mechanism according to claim 24, wherein the connecting portion is an engaging portion, and the valve housing is provided with a fitting portion that is engaged with the engaging portion.
The pressure accumulating sealing mechanism according to claim 25, wherein the engaging portion is an annular snap structure.
The pressure accumulating sealing mechanism according to claim 24, wherein the valve body is a cylindrical structure, one end of the cylindrical structure is closed to form the sealing portion, and a side wall of the cylindrical structure is formed Said elastic part.
The pressure accumulating sealing mechanism according to claim 27, wherein the other end of the cylindrical structure is opened to form the connecting portion.
The pressure accumulating sealing mechanism according to claim 27, wherein a central portion of the end surface of the closed end of the cylindrical structure protrudes outward to form a flow guiding portion.
A nozzle device comprising:

The pressure storage sealing mechanism includes a liquid inlet, a liquid outlet, and a valve core disposed between the liquid inlet and the liquid outlet, the valve core is an integrally formed structure, and can be elastically deformed. The valve core seals the liquid inlet, and when the hydraulic pressure of the liquid inlet reaches a predetermined value, the valve core is elastically deformed to release the sealing of the liquid inlet;

A nozzle mechanism is coupled to the pressure accumulating sealing mechanism, and the nozzle mechanism is in communication with the liquid outlet.
A head device according to claim 30, wherein said valve body includes a sealing portion and an elastic portion connected to said sealing portion, said elastic portion being capable of preloading said sealing portion against said a liquid port, the sealing portion sealing the liquid inlet;

Wherein, when the hydraulic pressure of the liquid inlet reaches a predetermined value, the sealing portion presses the elastic portion to elastically deform the elastic portion to release the sealing of the liquid inlet.
A head device according to claim 31, wherein said valve body further comprises a flow guiding portion projecting from said sealing portion into said liquid inlet.
A head device according to claim 32, wherein the diameter of said flow guiding portion gradually decreases as the distance from said sealing portion increases.
A head device according to claim 32, wherein said flow guiding portion has a tapered or frustum shape.
A head device according to claim 31, wherein said sealing portion and said elastic portion together define a hollow body.
The head device according to claim 31, wherein the elastic portion is recessed, convexly or multi-stage curved in a vertical direction of the spool axial direction.
A head device according to claim 30, wherein said pressure accumulating sealing mechanism further comprises a valve cover, said liquid inlet being disposed in said valve cover.
A head device according to claim 37, wherein said pressure accumulating sealing mechanism further comprises a valve casing connected to said valve cover, said liquid discharge port being formed on said valve casing, said valve core being mounted On the valve housing.
A head device according to claim 38, wherein said pressure accumulating sealing mechanism further comprises a seal ring fixed to a joint of said valve cover and said valve casing.
A head device according to claim 38, wherein said valve cover includes a first outer sleeve, said valve housing includes a second outer sleeve, said valve cover and said valve cover pass said first The mating of the outer sleeve and the second outer sleeve are interconnected.
40. The showerhead assembly of claim 40, wherein the first outer sleeve and the second outer sleeve are mated or snap-fitted.
A showerhead apparatus according to claim 40, wherein said valve housing includes a second inner sleeve in said second outer sleeve, said spool being mounted on said second inner sleeve.
A showerhead apparatus according to claim 42, wherein said second inner sleeve is disposed coaxially with said second outer sleeve.
A head device according to claim 42, wherein said liquid outlet is opened on said second inner sleeve.
A head device according to claim 44, wherein said valve cover further comprises a first inner sleeve in said first outer sleeve, said liquid inlet opening in said first inner sleeve The end.
A showerhead apparatus according to claim 45, wherein said first inner sleeve is disposed coaxially with said first outer sleeve.
A head device according to claim 45, wherein one end of said first outer sleeve is coupled to an outer wall of said first inner sleeve, and one end of said second outer sleeve is coupled to said second An outer wall of the inner sleeve, the free end of the first outer sleeve being screwed or fastened to the free end of the second outer sleeve.
The head device according to claim 47, wherein the free end of the first outer sleeve is internally provided with an internal thread, and the outside of the second outer sleeve is provided with an external thread that cooperates with the internal thread. .
A head device according to claim 47, wherein the end of the second outer sleeve is provided with a positioning boss.
The head device according to claim 49, wherein a stepped structure is formed inside the first outer sleeve, and a seal ring is sandwiched between the stepped structure and the positioning boss.
The head device according to claim 50, wherein said first outer sleeve, said sealing ring, said second outer sleeve, said first inner sleeve, said second inner sleeve and said valve body are common Enclosed into the accumulator chamber.
A head device according to claim 51, wherein said liquid outlet is opened between said second outer sleeve and said second inner sleeve.
A head device according to claim 38, wherein said valve body further includes a connecting portion connected to one end of said elastic portion away from said sealing portion, said connecting portion being detachably connected to said valve housing .
The head device according to claim 53, wherein the connecting portion is an engaging portion, and the valve housing is provided with a fitting portion that is engaged with the engaging portion.
A head device according to claim 54, wherein said engaging portion is an annular snap structure.
A head device according to claim 53, wherein said valve body is a cylindrical structure, one end of said cylindrical structure is closed to form said sealing portion, and said side wall of said cylindrical structure forms said elasticity unit.
A head device according to claim 56, wherein the other end of the cylindrical structure is open to form the connecting portion.
A head device according to claim 56, wherein a central portion of the end face of the closed end of the cylindrical structure projects outward to form a flow guiding portion.
A head device according to claim 38, wherein said nozzle mechanism is mounted at an end of said valve casing away from said valve cover.
A head device according to claim 53, wherein said nozzle mechanism is provided with a screen, said screen projecting into said valve housing.