CN112483676B

CN112483676B - External integral type three-way valve of spring

Info

Publication number: CN112483676B
Application number: CN202011260662.4A
Authority: CN
Inventors: 陈建松; 罗荣海; 郑志良; 钟建苗; 蒋宗
Original assignee: Zhejiang Chunhui Intelligent Control Co Ltd
Current assignee: Zhejiang Chunhui Intelligent Control Co Ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-11-30
Anticipated expiration: 2040-11-12
Also published as: CN112483676A

Abstract

The invention discloses an integrated three-way valve with an external spring, which comprises a shell, wherein the shell comprises a water inlet channel, a first water outlet channel and a second water outlet channel, the first water outlet channel and the second water outlet channel are communicated with the water inlet channel in a switching manner, the shell comprises a valve cavity, a valve core is installed in the valve cavity, the valve core comprises a motor base, a three-way framework and a valve rod, the motor base comprises a through hole, the valve rod penetrates through the through hole, a first spring is sleeved on the periphery of the valve rod in the motor base, a fourth sealing ring is arranged on the valve rod below the through hole, a first sealing seat and a second sealing seat are installed on the periphery of the valve rod, a second spring is sleeved on the periphery of the valve rod, a first sealing cover is installed on the upper portion of the first sealing seat, a fifth sealing ring which is sleeved on the outer wall of the valve rod and used for preventing fluid from flowing upwards to the second spring is arranged in the first sealing seat and between the first sealing cover and the fifth sealing ring. The first spring and the second spring are not in contact with water, so that the service life is prolonged, and when the pressure below the first sealing seat is greater than a set value, the pressure can be directly relieved.

Description

External integral type three-way valve of spring

Technical Field

The invention relates to the technical field of water outlet modules of wall-mounted furnaces, in particular to an integrated three-way valve with an external spring.

Background

A three-way valve that is used for hanging stove to go out water module at present has following problem:

first, during operation spring all submergence and water direct contact, and the time can cause the spring scale deposit for a long time, influences its performance and life, in case the spring inefficacy will not seal the valve port.

And secondly, the motor of the three-way valve can provide 70-120N force, when the external floor heating waterway is closed or blocked, the pressure of the outlet section of the floor heating waterway of the three-way valve is increased, the pressure generated by water thermal expansion and cold contraction is greater than the torque force of the motor, so that the motor can not push the valve rod to descend, and the lower valve port can not be opened.

And thirdly, the lower valve port of the three-way valve (namely, the valve port communicated with the water inlet channel and the floor heating pipeline) adopts a reset spring, namely, the lower end of the lower sealing seat is propped against the reset spring, the reset spring is positioned at the lower end of the lower valve port, the spring has certain length (the spring also needs a supporting component), the whole height of the three-way valve cannot be lowered, the lower sealing seat moves downwards to seal the lower valve port, the water resistance is large, the motor drives the valve rod to seal the lower valve port by large force, and the benefit is low.

Four, the case of three-way valve is split type, it includes the motor mount pad of upper end and the heating spring holder of lower extreme, motor mount pad threaded mounting is in the valve pocket upper end, heating spring holder threaded mounting is at the valve pocket lower extreme, pack into motor mount pad threaded connection earlier during the installation, motor mount pad this moment has been assembled and has gone up the seal receptacle, then from up packing into down seal receptacle (the seal receptacle supports down the valve port) and spring down in proper order, it supports down seal receptacle and heating spring holder respectively to pack into heating spring holder and butt spring (the upper and lower end of spring supports down seal receptacle and heating spring holder respectively), it is very troublesome when the case of this kind of structure is changed, must put water, just can change when whole three-way valve is lifted off. Meanwhile, when the tightening force of the heating spring seat at the lower end is too small, the external pipe joint can loosen the heating spring seat; when the screwing force of the heating spring seat at the lower end is too large, the heating spring seat is difficult to unscrew during replacement.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an externally arranged spring integrated three-way valve, wherein a first spring and a second spring are not in contact with water, the service life is prolonged, and when the pressure below a first sealing seat is greater than a set value, the pressure can be directly relieved.

In order to achieve the purpose, the invention adopts the following technical scheme:

an external integral type three-way valve of spring, includes the casing, the casing includes inhalant canal, first exhalant canal and second exhalant canal, first exhalant canal, second exhalant canal switch over the intercommunication with inhalant canal, the casing includes the valve pocket, the case is installed to the valve pocket, the case includes motor cabinet, three-way skeleton and the valve rod that distributes with one heart, motor cabinet and three-way skeleton are connected, and the outer wall and the valve pocket perisporium of motor cabinet are sealed to be cooperated, the motor cabinet includes the perforation that is located the center, the valve rod passes the perforation and the upper end of valve rod is located the motor cabinet, and the valve rod periphery cover that is located the motor cabinet establishes to provide the first spring of pulling force for the valve rod, and the valve rod that is located the perforation below is equipped with the fourth sealing washer that blocks fluid to flow into the perforation upwards, three-way skeleton includes the sealed complex skeleton upper sealing ring and the skeleton lower sealing ring of skeleton with the valve pocket perisporium, the utility model discloses a valve rod, including skeleton upper sealing ring, skeleton lower sealing ring, inlet channel, first seal seat and second seal seat, inlet channel and first water outlet channel intercommunication when first seal seat is sealed to support skeleton upper sealing ring, inlet channel and second water outlet channel intercommunication when second seal seat is sealed to support skeleton lower sealing ring, valve rod periphery cover establishes to provide tensile second spring for the valve rod, the first sealed lid of upper portion seal installation of first seal seat is equipped with interference fit cover in the first seal seat and establishes the fifth sealing washer that blocks fluid flow direction to the second spring that upwards of valve rod outer wall, the second spring is located between first sealed lid and the fifth sealing washer.

The motor base threaded connection exceeds the valve cavity on the upper portion of the valve cavity and the upper end of the motor base, and the tee joint framework is in threaded connection with the motor base.

The motor cabinet includes the portion of holding, it is located the center of the portion of holding to perforate, the cardboard is installed to the valve rod outer wall, the laminating of cardboard lower extreme is equipped with first spring mount pad, the upper end butt cardboard lower extreme of first spring, the lower extreme butt of first spring in the portion of holding periphery department of motor cabinet.

The lower extreme of holding portion forms uncovered, from last fourth sealing washer, guide pin bushing and first snap ring down being equipped with in the holding portion, the inner ring wall and the valve rod outer wall interference fit of fourth sealing washer, the outer ring wall and the holding portion inner wall interference fit of fourth sealing washer, the guide pin bushing is passed in the valve rod laminating, the upper end butt of guide pin bushing is in the step position in the holding portion, and the lower extreme of guide pin bushing passes through first snap ring location.

The lower extreme of accommodation portion is connected with the cover, the valve rod passes cover and valve rod and cover clearance fit.

The first sealing cover is slidably mounted on the first sealing seat.

The upper end and the lower end of the first sealing cover are respectively provided with a first top plate and a second top plate in a laminating mode, the upper end of the second spring is abutted to the second top plate, the outer wall of the valve rod is provided with a second clamping ring, the lower end of the second clamping ring is abutted to the upper end of the first top plate in a laminating mode, a third top plate is arranged in the first sealing seat, the lower end of the second spring is abutted to the third top plate, and the third top plate is located above the fifth sealing ring.

The sealed lid of second is installed to the top of second seal receptacle, the center of the sealed lid of second and second seal receptacle is passed to the valve rod, the sealed lid of second and the cooperation of second seal receptacle form a pressure release chamber, last third spring, fourth roof and the sealing ring down being equipped with of follow in the pressure release chamber, the periphery of valve rod is all located to third spring, fourth roof and sealing ring cover, the second seal receptacle is including being located the second seal receptacle convex part of pressure release intracavity, the sealing ring supports the second seal receptacle convex part downwards under the effort of third spring.

The circumference inner wall of sealing ring is equipped with sealed oblique portion on the skeleton, sealed oblique portion is the internal diameter from last down reducing gradually of slope form and sealed oblique portion, the sixth sealing washer is installed to the outer wall of first seal receptacle, but sixth sealing washer downwardly movable and sealed butt in sealed oblique portion.

And a seventh sealing ring is mounted on the outer wall of the second sealing seat, and the seventh sealing ring can move upwards and is abutted to the lower framework sealing ring in a sealing manner.

The invention has the beneficial effects that:

the first spring, the first spring and the second spring always push the valve rod upwards, and the design of the pull-up spring can save parts and reduce the overall height of the three-way valve;

the first spring and the second spring are hermetically protected and are not contacted with water, so that the reliable work of the springs is ensured, and the service life is prolonged;

thirdly, the valve rod can be driven to move downwards by the redundant stroke generated by the motor, the first sealing cover is driven to slide downwards a little along the first sealing seat, and the second spring can play a buffering role and protect parts such as the motor and the like;

fourthly, the motor drives the valve rod to descend, so that the seventh sealing ring does not seal the lower sealing ring of the framework any more, water can be introduced after the valve port at the position is opened a little, the water resistance is small, the efficiency is high, and the pressure resistance is small when the motor works;

when the pressure below the second sealing seat is larger than a set value, the water pressure pushes the sealing ring upwards to enter the pressure relief cavity and flow away upwards from a gap between the transverse part of the second sealing cover and the valve rod, and the motor can easily push the second sealing seat after pressure relief, so that the motor cannot be damaged;

and sixthly, the integrated valve core is adopted, the whole valve core can be directly screwed out from the upper end of the valve cavity, the valve core is very convenient to sell, and the after-sale cost can be greatly saved.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a perspective view of the housing of the present invention;

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

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is an enlarged view at B in FIG. 4;

FIG. 6 is an enlarged view at C of FIG. 4;

FIG. 7 is a perspective view of the valve cartridge of the present invention;

FIG. 8 is a perspective view of the motor mount of the present invention;

FIG. 9 is a cross-sectional view of the motor mount of the present invention;

FIG. 10 is a perspective view of the three-way armature of the present invention;

figure 11 is a perspective view of a card of the present invention.

In the figure: the valve comprises a shell 1, a valve cavity 11, a water inlet channel 12, a first water outlet channel 13, a second water outlet channel 14, a bathroom water inlet channel 15, a bathroom water outlet channel 16, a valve core 2, a motor base 21, a motor base flange 211, a motor base screwed part 212, a motor base sealing groove 213, a motor base connecting ring 214, a containing part 215, a containing part connecting groove 2151, a notch 2152, a through hole 216, a first groove 217, a second groove 218, a clamping ring groove 219, a three-way framework 22, a framework connecting ring 221, a framework upper sealing ring 222, a framework lower sealing ring 223, a first connecting plate 224, a second connecting plate 225, a connecting plate stepped part 226, an upper sealing groove 227, a lower sealing ring sealing groove 228, a sealing inclined part 229, a valve rod 23, a first sealing ring 3, a second sealing ring 31, a third sealing ring 32, a clamping plate 4, a first clamping plate hole 400, a second clamping plate hole 401, a first spring mounting seat 41, a first spring 42, a fourth sealing ring 43, a bathroom water inlet channel 16, a bathroom water outlet channel 16, a bathroom water channel 16, a valve core 2, a valve seat 21, a motor base, a three-way frame, a three-way structure, a three-structure, a, The guide sleeve 44, the first snap ring 45, the cover sleeve 46, the buckle part 461, the first seal holder 5, the first seal cover 51, the first seal cover transverse part 511, the first seal cover vertical part 512, the second snap ring 52, the first top plate 53, the second top plate 54, the second spring 55, the third top plate 56, the fifth seal ring 57, the third snap ring 58, the sixth seal ring 59, the fourth snap ring 6, the second seal holder 61, the second seal holder transverse part 611, the second seal holder vertical part 612, the second seal holder convex part 613, the second seal cover 62, the second seal cover vertical part 621, the second seal cover transverse part 622, the third spring 63, the fourth top plate 64, the seal ring 65, the seventh seal ring 66 and the fifth snap ring 67.

Detailed Description

The invention is further described with reference to the accompanying drawings and the detailed description below:

as shown in fig. 1 to 11, an external spring integrated three-way valve includes a housing 1, the housing 1 is made of copper material, the housing 1 includes a water inlet channel 12, a first water outlet channel 13 and a second water outlet channel 14, the first water outlet channel 13, the second water outlet channel 14 and the water inlet channel 12 are switched and communicated, the housing 1 further includes a bathroom water inlet channel 15 and a bathroom water outlet channel 16 which are communicated, when the water inlet channel 12 is communicated with the first water outlet channel 13, the water inlet channel 12 is not communicated with the second water outlet channel 14, and at this time, hot water is supplied to a floor heating system; when the water inlet channel 12 is communicated with the second water outlet channel 14, the water inlet channel 12 is not communicated with the first water outlet channel 13, at this time, hot water entering from the water inlet channel 12 flows through the heat exchanger through the second water outlet channel 14, cold water for supplying bathroom is coming from the other end of the heat exchanger, exchanges heat with the hot water in the heat exchanger to raise the water temperature, the raised water enters the bathroom water inlet channel 15 after coming out of the heat exchanger, and then is discharged from the bathroom water outlet channel 16 for bathroom, which are the prior art and are not described in detail herein.

Casing 1 includes valve pocket 11, and inhalant canal 12 directly communicates valve pocket 11, and first exhalant canal 13 is located the bottom of valve pocket 11, case 2 is installed to valve pocket 11, case 2 includes motor cabinet 21, tee bend skeleton 22 and the valve rod 23 of concentric distribution, and motor cabinet 21, tee bend skeleton 22 are the metal material, and tee bend skeleton 22 is whole to be located case 2, and motor cabinet 21 part is located case 2. Motor cabinet 21 threaded connection surpasss valve pocket 11 in valve pocket 11 upper portion and motor cabinet 21 upper end, the outer wall and the 11 perisporium of valve pocket of motor cabinet 21 seal the cooperation, motor cabinet 21 includes motor cabinet flange 211 and is located motor cabinet spiro union portion 212 of motor cabinet flange 211 below, motor cabinet 21 still includes motor cabinet seal groove 213, motor cabinet seal groove 213 is located between motor cabinet flange 211 and the motor cabinet spiro union portion 212, be equipped with first sealing washer 3 in the motor cabinet seal groove 213, the upper end perisporium of valve pocket 11 is equipped with the screw thread supporting with motor cabinet spiro union portion 212, motor cabinet 21 spiral is twisted casing 1 and is supported the up end of valve pocket 11 until motor cabinet flange 211, first sealing washer 3 cooperation sealed valve pocket 11 and motor cabinet 21 this moment.

Three-way skeleton 22 includes the sealed complex skeleton upper sealing ring 222 and skeleton lower sealing ring 223 with valve chamber 11 perisporium, skeleton upper sealing ring 222 and skeleton lower sealing ring 223 correspond the upper and lower below that is located intake passage 12 respectively, the annular outer wall of skeleton upper sealing ring 222 is equipped with upper sealing ring seal groove 227, install second sealing washer 31 in the upper sealing ring seal groove 227, second sealing washer 31 cooperation seal valve chamber 11 and skeleton upper sealing ring 222, the annular outer wall of skeleton lower sealing ring 223 is equipped with lower sealing ring seal groove 228, install third sealing washer 32 in the lower sealing ring seal groove 228, valve chamber 11 and skeleton lower sealing ring 223 are sealed in the cooperation of third sealing washer 32. The upper skeleton sealing ring 222 and the lower skeleton sealing ring 223 are connected by a plurality of second connection plates 225, and water entering from the water inlet passage 12 directly enters a space between the upper skeleton sealing ring 222 and the lower skeleton sealing ring 223 and then is selectively conducted upwards or downwards.

The motor base 21 is connected with the three-way framework 22, and specifically, the three-way framework 22 is in threaded connection with the motor base 21. The motor base 21 comprises a motor base connecting ring 214 located at the lower end, the three-way skeleton 22 comprises a skeleton connecting ring 221 located at the upper end, and the annular outer wall of the motor base connecting ring 214 is connected with the annular inner wall of the skeleton connecting ring 221 through threads. The skeleton connecting ring 221 and the skeleton upper sealing ring 222 are connected through a plurality of first connecting plates 224, the inner walls of the first connecting plates 224 protrude out of the annular inner walls of the skeleton connecting ring 221 to form connecting plate step portions 226, and when the length of the thread sections of the annular outer walls of the motor base connecting rings 214 is too long, the motor base connecting rings 214 are screwed until the outer walls abut against the connecting plate step portions 226.

Motor cabinet 21 is including being located the perforation 216 at center, valve rod 23 passes perforation 216 and the upper end of valve rod 23 is located motor cabinet 21, and the valve rod 23 periphery cover that is located motor cabinet 21 is established and is provided the first spring 42 of pull-up force for valve rod 23, motor cabinet 21 is including holding portion 215, perforation 216 is located the center of holding portion 215, cardboard 4 is installed to valve rod 23 outer wall, and cardboard 4 is equipped with first cardboard hole 400 and the second cardboard hole 401 of intercommunication, and wherein the aperture of first cardboard hole 400 is greater than the external diameter of valve rod 23, and the aperture of second cardboard hole 401 is equivalent with the draw-in groove aperture of valve rod 23, and first cardboard hole 400 is inserted earlier to valve rod 23, and then it can to move to second cardboard hole 401 and support the draw-in groove hole of valve rod 23. The lower end of the clamping plate 4 is attached to a first spring mounting seat 41, the upper end of the first spring 42 abuts against the lower end of the clamping plate 4, and the lower end of the first spring 42 abuts against the periphery of the accommodating part 215 of the motor base 21. The first spring 42 always has a force of pushing the clamping plate 4 upwards, namely the first spring 42 always pushes the valve rod 23 upwards, and in this state, the seventh sealing ring 66 can always firmly seal the framework lower sealing ring 223.

The valve rod 23 located below the through hole 216 is provided with a fourth sealing ring 43 for blocking fluid from flowing upwards to the through hole 216, the lower end of the accommodating part 215 is open, the accommodating part 215 is sequentially provided with the through hole 216, a first groove 217 and a second groove 218 from top to bottom, the through hole 216, the first groove 217 and the second groove 218 are arranged concentrically, and the outer diameter of the second groove 218 is larger than that of the first groove 217. The accommodating part 215 is internally provided with a fourth sealing ring 43, a guide sleeve 44 and a first snap ring 45 from top to bottom, the inner annular wall of the fourth sealing ring 43 is in interference fit with the outer wall of the valve rod 23, the outer annular wall of the fourth sealing ring 43 is in interference fit with the inner wall of the accommodating part 215, and the fourth sealing ring 43 is limited in the first groove 217, so that water below cannot enter upwards from the through hole 216, the first spring 42 cannot contact with water, the reliable work of the first spring 42 is ensured, and the service life of the first spring 42 is prolonged.

The valve rod 23 is attached to and penetrates through the guide sleeve 44, the guide sleeve 44 is made of polytetrafluoroethylene, friction resistance is small, the guide sleeve 44 is in clearance fit with the valve rod 23, the guide sleeve 44 plays a guiding role, the upper end of the guide sleeve 44 abuts against a step part in the accommodating part 215, namely the upper end of the guide sleeve 44 abuts against a step part at the junction of the first groove 217 and the second groove 218, and the lower end of the guide sleeve 44 is positioned through the first clamping ring 45. A clamping ring groove 219 is formed in the second groove 218, the first clamping ring 45 is clamped into the clamping ring groove 219, and the first clamping ring 45 abuts against the lower end of the guide sleeve 44.

The lower end of the accommodating part 215 is connected with a cover sleeve 46, the valve rod 23 passes through the cover sleeve 46, and the valve rod 23 is in clearance fit with the cover sleeve 46. The setting of lid cover 46 can reduce the space of intaking of valve rod 23 outer wall, and the lower extreme outer wall of holding portion 215 is equipped with holding portion connecting groove 2151, and the upper end inner wall of lid cover 46 is equipped with the cooperation card and goes into the knot portion 461 that holds portion connecting groove 2151, and both pass through the buckle connection, and the lower extreme of holding portion 215 still is equipped with two breachs 2152 of symmetric distribution, and the setting of breach 2152 makes lid cover 46 buckle into more easily. Alternatively, the cover 46 may be threadably coupled to the lower end of the receiving portion 215 (in which case the receiving portion coupling groove 2151 and the button 461 need not mate with each other).

The periphery of the valve rod 23 is provided with a first sealing seat 5 and a second sealing seat 61, the outer wall of the valve rod 23 is provided with a third clamping ring 58, and the center of the lower end of the first sealing seat 5 abuts against the upper end face of the third clamping ring 58.

The first sealing seat 5 is sealed and abutted against the framework upper sealing ring 222, the water inlet channel 12 is communicated with the first water outlet channel 13, and the second sealing seat 61 is sealed and abutted against the framework lower sealing ring 223, the water inlet channel 12 is communicated with the second water outlet channel 14, which is a means in the prior art.

The peripheral cover of valve rod 23 is established and is provided tensile second spring 55 for valve rod 23, the first sealed lid 51 of the upper portion seal installation of first seal receptacle 5, first sealed lid 51 are made for the silica gel material, and first sealed lid 51 includes integrated into one piece's first sealed lid horizontal part 511, first sealed lid vertical part 512, and first sealed lid vertical part 512 annular outer wall is sealed with the annular inner wall interference fit in first seal receptacle 5 upper end, and the annular inner wall of first sealed lid horizontal part 511 is sealed with valve rod 23 outer wall interference fit, first sealed lid 51 slides and installs in first seal receptacle 5. Since the first seal cap 51 is made of silicone, it has a deformation capability of moving up and down a little in the first seal holder 5. Motor cabinet 21 installs the motor (this type of motor is the prior art in three-way valve field, motor output turns into linear motion, the theory of particularity is that the motor rotates, drive inside cam and play and reciprocate, motor output end connects valve rod 23, when motor stroke is a bit bigger than the stroke of first seal receptacle 5, because first seal receptacle 5 has supported on the skeleton sealing ring 222 and has target in place, the unnecessary stroke that the motor produced this moment can make valve rod 23 downwards and drive first sealed lid 51 and slide a little along first seal receptacle 5 downwards, second spring 55 can be compressed slightly this moment, second spring 55 represents at ordinary times for sealing valve power (with first spring 42 the same principle), second spring 55 represents the cushion effect when motor stroke exceeds the limit.

A fifth sealing ring 57 which is sleeved on the outer wall of the valve rod 23 in an interference fit manner and blocks fluid from flowing upwards to the second spring 55 is arranged in the first sealing seat 5, and the second spring 55 is positioned between the first sealing cover 51 and the fifth sealing ring 57. The upper and lower end of first sealed lid 51 is laminated respectively and is equipped with first roof 53 and second roof 54, and first sealed lid 51 material is softer, and first roof 53 and second roof 54 adopt harder material, can effectively keep first sealed lid 51's shape, the upper end butt second roof 54 of second spring 55, second snap ring 52 is installed to valve rod 23 outer wall, the lower extreme laminating of second snap ring 52 butts the upper end of first roof 53, and second spring 55 shows at ordinary times and is for sealing the valve power like this, has an upward pulling force to valve rod 23 promptly.

A third top plate 56 is arranged in the first seal holder 5, the valve rod 23 passes through the third top plate 56, the lower end of the second spring 55 abuts against the third top plate 56, and the third top plate 56 is positioned above a fifth seal ring 57. The first seal holder 5 is provided with a stepped portion therein, and the lower end of the third top plate 56 abuts against the stepped portion. The inner wall of the fifth sealing ring 57 is in interference fit with the valve rod 23, the outer wall of the fifth sealing ring 57 is in interference fit with the inner wall of the first sealing seat 5, and the fifth sealing ring 57 can prevent water below from entering from a gap between the valve rod 23 and the center of the bottom of the first sealing seat 5, so that the second spring 55 is reliably protected, the second spring 55 is not in contact with water, the reliable work of the second spring 55 is ensured, and the service life of the second spring 55 is prolonged.

A second seal cover 62 is arranged above the second seal seat 61, the second seal seat 61 comprises a second seal seat transverse part 611 and a second seal seat vertical part 612 which are integrally formed, the second seal seat vertical part 612 is vertically positioned on the upper end surface of the second seal seat transverse part 611, the second seal cover 62 comprises a second seal cover vertical part 621 and a second seal cover transverse part 622, the annular outer wall of the second seal cover vertical part 621 is attached to the annular inner wall of the second seal seat vertical part 612, the lower end surface of the second seal cover vertical part 621 is abutted against the upper end surface of the second seal seat transverse part 611, the valve rod 23 passes through the centers of the second seal cover 62 and the second seal seat 61, a gap is formed between the annular inner wall of the second seal cover transverse part 622 and the outer wall of the valve rod 23, a fourth snap ring 6 and a fifth snap ring 67 are arranged on the outer wall of the valve rod 23, the fourth snap ring 6 is abutted against the upper end surface of the second seal cover transverse part 622, the fifth snap ring 67 is abutted against the lower end surface of the second seal seat transverse part 611, the second seal holder 61 and the second seal cover 62 are limited by the fourth snap ring 6 and the fifth snap ring 67.

The sealed lid 62 of second and the cooperation of second seal receptacle 61 form a pressure release chamber, from last third spring 63, fourth roof 64 and the sealing ring 65 down being equipped with of pressure release intracavity, the periphery of valve rod 23 is all located to third spring 63, fourth roof 64 and sealing ring 65 cover, and the upper end of third spring 63 supports terminal surface under the sealed lateral part 622 of second, and the lower extreme of third spring 63 supports fourth roof 64, and fourth roof 64 adopts harder material to make, and sealing ring 65 can adopt silica gel to make, and fourth roof 64 supports the sealing ring 65 up end under the effort of third spring 63. The second seal seat 61 includes a second seal seat protrusion 613 located in the pressure relief cavity, and the seal ring 65 is pressed downward against the second seal seat protrusion 613 by the force of the third spring 63.

In the prior art, when the pressure below the first seal seat 5 is greater than the torque force generated by the motor, the motor is difficult to push the first seal seat 5 downward, in this embodiment, when the pressure below the first seal seat 5 is greater than the set value, the water pressure is greater than the downward acting force of the third spring 63 at this time, the water pressure below the first seal seat 5 enters from the gap between the first seal seat 5 and the valve rod 23 and pushes the seal ring 65 upward, the third spring 63 is compressed and deformed, water enters the pressure relief cavity and flows away upward from the gap between the second seal cover transverse portion 622 and the valve rod 23, so the pressure below the first seal seat 5 is reduced, the motor can push the first seal seat 5 easily, and the motor cannot be damaged.

The circumferential inner wall of the framework upper sealing ring 222 is provided with a sealing inclined part 229, the sealing inclined part 229 is inclined, the inner diameter of the sealing inclined part 229 is gradually reduced from top to bottom, the sixth sealing ring 59 is installed on the outer wall of the first sealing seat 5, and the sixth sealing ring 59 can move downwards and is in sealing abutting connection with the sealing inclined part 229. The provision of the seal bevel 229 improves the sealing effect.

A seventh sealing ring 66 is mounted on the outer wall of the second sealing seat 61, and the seventh sealing ring 66 can move upward and is in sealing contact with the lower framework sealing ring 223. The motor drives the valve rod 23 to descend, so that the seventh sealing ring 66 does not seal the framework lower sealing ring 223 any more, water can flow through the valve port at the position after the valve port is opened a little, the water resistance is small, and the efficiency is high. And because the lower end of the second sealing seat 61 is not propped by a spring, the pressure resistance is small when the motor works.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides an external integral type three-way valve of spring, includes casing (1), casing (1) includes inhalant canal (12), first exhalant canal (13) and second exhalant canal (14), first exhalant canal (13), second exhalant canal (14) switch the intercommunication with inhalant canal (12), its characterized in that: the casing (1) comprises a valve cavity (11), the valve core (2) is installed on the valve cavity (11), the valve core (2) comprises a motor base (21), a three-way framework (22) and a valve rod (23) which are concentrically distributed, the motor base (21) is connected with the three-way framework (22), the outer wall of the motor base (21) is in sealing fit with the peripheral wall of the valve cavity (11), the motor base (21) comprises a through hole (216) which is arranged in the center, the valve rod (23) penetrates through the through hole (216), the upper end of the valve rod (23) is located in the motor base (21), a first spring (42) which provides an upper pulling force for the valve rod (23) is sleeved on the periphery of the valve rod (23) which is located in the motor base (21), a fourth sealing ring (43) which blocks fluid from flowing upwards to the through hole (216) is arranged on the valve rod (23) below the through hole (216), the three-way framework (22) comprises an upper framework sealing ring (222) and a lower framework sealing ring (223) which are in sealing fit with the peripheral wall of the valve cavity (11), the upper sealing ring (222) of the framework and the lower sealing ring (223) of the framework are respectively and correspondingly positioned above and below the water inlet channel (12), a first sealing seat (5) and a second sealing seat (61) are installed on the periphery of the valve rod (23), the water inlet channel (12) is communicated with the first water outlet channel (13) when the first sealing seat (5) is sealed to abut against the upper sealing ring (222) of the framework, the water inlet channel (12) is communicated with the second water outlet channel (14) when the second sealing seat (61) is sealed to abut against the lower sealing ring (223) of the framework, a second spring (55) which provides an upper pulling force for the valve rod (23) is sleeved on the periphery of the valve rod (23), a first sealing cover (51) is hermetically installed on the upper part of the first sealing seat (5), a fifth sealing ring (57) which blocks fluid and upwards flows to the second spring (55) and is arranged on the outer wall of the valve rod (23) in an interference fit manner is arranged in the first sealing seat (5), second spring (55) are located between first sealed lid (51) and fifth sealing washer (57), the sealed lid of second (62) is installed to the top of second seal receptacle (61), the center of sealed lid of second (62) and second seal receptacle (61) is passed in valve rod (23), the cooperation of the sealed lid of second (62) and second seal receptacle (61) forms a pressure release chamber, last third spring (63), fourth roof (64) and sealing ring (65) down being equipped with in the pressure release chamber, the periphery of valve rod (23) is all located in third spring (63), fourth roof (64) and sealing ring (65) cover, second seal receptacle (61) are including being located second seal receptacle convex part (613) in the pressure release chamber, sealing ring (65) support second seal receptacle convex part (613) downwards under the effort of third spring (63).

2. The integrated three-way valve with the external spring as set forth in claim 1, wherein: motor cabinet (21) threaded connection is in valve chamber (11) upper portion and motor cabinet (21) upper end surpasss valve chamber (11), tee bend skeleton (22) and motor cabinet (21) threaded connection.

3. The integrated three-way valve with the external spring as set forth in claim 1, wherein: the motor cabinet (21) comprises an accommodating part (215), the through hole (216) is located in the center of the accommodating part (215), the clamping plate (4) is installed on the outer wall of the valve rod (23), a first spring installation seat (41) is arranged at the lower end of the clamping plate (4) in an attached mode, the upper end of the first spring (42) is abutted to the lower end of the clamping plate (4), and the lower end of the first spring (42) is abutted to the periphery of the accommodating part (215) of the motor cabinet (21).

4. The externally-mounted integrated three-way valve of claim 3, wherein: the lower extreme of holding portion (215) forms uncovered, from the top down is equipped with fourth sealing washer (43), guide pin bushing (44) and first snap ring (45) in holding portion (215), the inner ring wall and the valve rod (23) outer wall interference fit of fourth sealing washer (43), the outer ring wall and the inner wall interference fit of holding portion (215) of fourth sealing washer (43), guide pin bushing (44) are passed in the laminating of valve rod (23), the upper end butt in the step position in holding portion (215) of guide pin bushing (44), and the lower extreme of guide pin bushing (44) is fixed a position through first snap ring (45).

5. The externally-mounted integrated three-way valve of claim 3, wherein: the lower extreme of accommodation portion (215) is connected with cover (46), valve rod (23) pass cover (46) and valve rod (23) and cover (46) clearance fit.

6. The integrated three-way valve with the external spring as set forth in claim 1, wherein: the first sealing cover (51) is mounted on the first sealing seat (5) in a sliding mode.

7. The integrated three-way valve with the external spring as set forth in claim 1, wherein: the upper and lower end of first sealed lid (51) is laminated respectively and is equipped with first roof (53) and second roof (54), the upper end butt second roof (54) of second spring (55), second snap ring (52) are installed to valve rod (23) outer wall, the lower extreme laminating of second snap ring (52) supports the upper end of first roof (53), be equipped with third roof (56) in first seal receptacle (5), the lower extreme butt third roof (56) of second spring (55), third roof (56) are located the top of fifth sealing washer (57).

8. The integrated three-way valve with the external spring as set forth in claim 1, wherein: the circumference inner wall of sealing ring (222) is equipped with sealed skew portion (229) on the skeleton, sealed skew portion (229) are the internal diameter from the top down taper down of slope form and sealed skew portion (229), sixth sealing washer (59) is installed to the outer wall of first seal receptacle (5), sixth sealing washer (59) can move down and sealed butt in sealed skew portion (229).

9. The integrated three-way valve with the external spring as set forth in claim 1, wherein: and a seventh sealing ring (66) is installed on the outer wall of the second sealing seat (61), and the seventh sealing ring (66) can move upwards and is in sealing butt joint with the framework lower sealing ring (223).