CN105889590A - Double valve port flow regulating mechanism in expansion valve and expansion valve - Google Patents
Double valve port flow regulating mechanism in expansion valve and expansion valve Download PDFInfo
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- CN105889590A CN105889590A CN201610354752.7A CN201610354752A CN105889590A CN 105889590 A CN105889590 A CN 105889590A CN 201610354752 A CN201610354752 A CN 201610354752A CN 105889590 A CN105889590 A CN 105889590A
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- sealing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
Abstract
The invention discloses a double valve port flow regulating mechanism in an expansion valve. The double valve port flow regulating mechanism comprises a valve body, a valve core assembly and an upper push rod; the valve body is internally provided with a containing cavity, an upper valve port and a lower valve port are formed inside the containing cavity in the valve body, the inner diameter of the upper valve port is equal to the inner diameter of the lower valve port, and the valve body is provided with a push rod passing hole communicating with an upper cavity; the valve core assembly is arranged inside the containing cavity and is composed of an upper valve needle and a lower valve needle. By moving the valve core assembly through the upper push rod, the valve core assembly can selectively open or close the upper valve port and the lower valve port simultaneously or adjust the flow of the upper valve port and the lower valve port simultaneously in the state that the stress is equal and offset and the flow port is balanced. The invention further provides the expansion valve comprising the flow regulating mechanism. The flow regulating mechanism has the advantage of being suitable for electronic expansion valves and thermal expansion valves.
Description
Technical field
The present invention relates to the bivalve mouth flow control device in expansion valve, and expansion valve.
Background technology
Chinese invention application CN104344050A is disclosed " electric expansion valve ", Chinese invention application CN103671936A is disclosed " electric expansion valve and manufacture method thereof ", the existing electric expansion valves such as Chinese invention application CN103575000A disclosed " a kind of electric expansion valve " are the form of single valve mouth, valve port is when turning off or on, under pressure differential effect between expansion valve import, valve port has a self-styled power or backs down power, supporting pulse motor is needed bigger output moment of torsion, therefore general adoption rate governor motion amplifies Motor torque crosses closedown to the unlatching completing valve port, the structure causing valve is complicated, manufacture difficulty.Especially, owing to being single valve degree of lip-rounding formula, flow is much smaller than bivalve degree of lip-rounding formula.
Also, existing big flow heating power expansion valves such as Chinese invention application CN104121375A disclosed " a kind of two-way heating power expansion valve ", the diameter of its upper and lower two valve ports is impossible equal, therefore valve does not reaches balance head piece characteristic requirements.And the bivalve mouth governor motion in low discharge heating power expansion valve can reach to balance head piece performance requirement, but structure complexity manufacturing cost is high.
Again also, it is seen that, existing electric expansion valve with in heating power expansion valve flow control device form structure characteristic can different, governor motion form differs, it is impossible to the most general.Which results in production and processing link, need to be that two kinds of different expansion valves design different flow structures, both increased production cost, and reduced again production efficiency.
In view of this, it would be highly desirable to design a kind of novel general bivalve mouth flow control device.
Summary of the invention
It is an object of the invention to overcome the problem that in prior art, flow control device lacks versatility, it is provided that a kind of novel bivalve mouth flow control device.
In order to realize this purpose, technical scheme is as follows: the bivalve mouth flow control device in expansion valve, includes,
Valve body, there is in it accommodating cavity, in described accommodating cavity, it is formed with upper valve port on described valve body and is in the lower valve port below described upper valve port, making the part being in more than described upper valve port in described accommodating cavity is upper chamber, the part being between described upper valve port and described lower valve port in described accommodating cavity is middle part chamber, the part being in below described lower valve port in described accommodating cavity is lower chamber, the internal diameter of described upper valve port is identical with the internal diameter of described lower valve port, the first pipeline and the second pipeline it has been fixably coupled on described valve body, described first pipeline system connects described middle part chamber, and described second pipeline system connect described upper chamber, there is on described valve body the push rod via connecting described upper chamber；
Core assembly, it is to be in described accommodating cavity, and described core assembly system is made up of upper needle and lower needle, preferably, described upper needle combines regularly with described lower needle system, and described upper needle system is in described upper valve port position, and described lower needle system is in described lower valve port position；And,
Top push rod, it is to be in described push rod via, described top push rod offsets with described upper needle body or is combined permanently, thereby, described top push rod is utilized to shift described spool group so that described upper valve port and described lower valve port optionally can be opened simultaneously, be closed at or adjust flow simultaneously by described core assembly.
Preferred version as the bivalve mouth flow control device in expansion valve, described upper needle has upper needle body and upper sealing, described upper needle body series extends in described upper chamber from described center lumen indoor through described upper valve port, in the way of upwards caving in, the first hole it is formed with on the bottom surface of described upper needle body, described first hole is divided into, lower two sections, epimere is upper runner hole, hypomere is combined hole, on described upper needle body, there is the upper pod apertures being along the circumferential direction distributed, described upper pod apertures system connects described upper chamber and described upper runner hole, described upper sealing system is formed on the outer peripheral face of described upper needle body；Described lower needle has lower needle body and sealing portion, it is indoor that described lower needle body series extends to described center lumen through described lower valve port in described lower chamber, again, described lower needle body matches in described combined hole, there is on described lower needle body the through lower flow channel hole to its end face and bottom surface, described lower flow channel hole is connected with described upper runner hole, and described sealing portion system is formed on the outer peripheral face of described lower needle body.
As the preferred version of the bivalve mouth flow control device in expansion valve, also include,
Latch bracket force mechanisms, it is the lower section being in described lower chamber and being placed in described lower needle body, and described latch bracket force mechanisms has the first spring, and described first spring system is in order to support described lower needle body.
Preferred version as the bivalve mouth flow control device in expansion valve, described first spring system is arranged along the vertical direction, the top system movable end of described first spring, the top of described first spring is surrounded on described lower needle body part below described sealing portion, the top of described first spring and described sealing portion offset or fix combination, the fixing end of bottom system of described first spring.
As the preferred version of the bivalve mouth flow control device in expansion valve, described first pipeline with on the described second pipeline tying outer peripheral face together in described valve body, described first pipeline and described second pipeline all being radially arranged along described valve body.
Preferred version as the bivalve mouth flow control device in expansion valve, described upper sealing system is in the lower section of described upper valve port, the cone structure that described upper sealing system is up-small and down-big, the apical margin external diameter of described upper sealing is less than the internal diameter of described upper valve port, and the root edge external diameter of described upper sealing is more than the internal diameter of described upper valve port；Described sealing portion system is in the lower section of described lower valve port, and described sealing portion is up-small and down-big cone structure, and the apical margin external diameter of described sealing portion is less than the internal diameter of described lower valve port, and the root edge external diameter of described sealing portion is more than the internal diameter of described lower valve port.
Preferred version as the bivalve mouth flow control device in expansion valve, the root edge of described upper sealing is less than the apical margin of described combined hole, the external diameter of described upper needle body part below described upper sealing is more than the external diameter of described upper needle body part more than described upper sealing, the internal diameter of described combined hole is less than the external diameter of described upper needle body part more than described upper sealing, described lower needle body is all identical with the external diameter of described upper needle body part more than described upper sealing in the external diameter of the part of described sealing portion above and below, make described lower needle body and described combined hole system interference fit；Further, the root edge of described combined hole is formed with guiding chamfering.
As the preferred version of the bivalve mouth flow control device in expansion valve, described expansion valve series electron expansion valve or heating power expansion valve.
Present invention also offers a kind of expansion valve, include, above-mentioned flow control device.
Compared with prior art, advantages of the present invention at least that: 1. simple in construction, good manufacturability, fluid balance power principle is utilized to achieve the characteristic of balance head piece, break through big flow heating power expansion valve difficulties in design and manufacture, simplify the motor-driven mechanism of electric expansion valve, reduce the power requirement to driving pulse motor.2. to have anufacturability good for mechanism, and low cost, reliable working performance, service life is long, cost performance high advantage.3. can be widely applicable for electric expansion valve and heating power expansion valve two distinct types of cold medium flux regulation valve, meet the coolant conveying of the different operating mode such as the freezing of refrigeration air-conditioner system, cold preservation, air-conditioning, heat pump, Flow-rate adjustment requirement, Flow-rate adjustment span of control is big, two-way flow is steady, simplify control piper, improve the Energy Efficiency Ratio of system.
Accompanying drawing explanation
Fig. 1 is the structural representation (closed mode) of one embodiment of the invention.
Fig. 2 is the structural representation (opening) of one embodiment of the invention.
Fig. 3 is valve body and the structural representation (decomposing state) of core assembly in one embodiment of the invention.
Fig. 4 is valve body and the structural representation (assembled state) of core assembly in one embodiment of the invention.
Fig. 5 is the structural representation of core assembly in one embodiment of the invention.
Fig. 6 is the structural representation of another embodiment of the present invention.
Fig. 7 is the structural representation of further embodiment of this invention.
Detailed description of the invention
Combine accompanying drawing below by specific embodiment the present invention is described in further detail.
Referring to Fig. 1 to 5, shown in figure is the bivalve mouth balance head piece bidirectional flow flow control device in a kind of expansion valve, in refrigeration air-conditioner system.This flow control device had both been suitable for electric expansion valve, was suitable for again heating power expansion valve simultaneously.This flow control device is mainly made up of valve body 1, core assembly 2, top push rod 4 and latch bracket force mechanisms 3.
On the whole described valve body 1 is column structure.Described valve body 1 has first axle, and described first axle system is vertically extending.There is in described valve body 1 accommodating cavity 10.In described accommodating cavity 10, it is formed with upper valve port 11 on described valve body 1 and is in the lower valve port 12 below described upper valve port 11.In this enforcement, described upper valve port 11 is to be made up of the inwall of described valve body 1, and described lower valve port system is made up of the choma being placed in described accommodating cavity 10.Thereby, the part being in described upper valve port more than 11 in described accommodating cavity 10 is upper chamber 101, the part being between described upper valve port 11 and described lower valve port 12 in described accommodating cavity 10 is middle part chamber 102, and the part being in described lower valve port less than 12 in described accommodating cavity 10 is lower chamber 103.The internal diameter of described upper valve port 11 is identical with the internal diameter of described lower valve port 12.Described accommodating cavity 10, described upper valve port 11 and described lower valve port 12 are all to arrange along first axle.
The first pipeline 13 and the second pipeline 14 it has been fixably coupled on the outer peripheral face of described valve body 1.Described first pipeline 13 is directly to connect described middle part chamber 102, and described second pipeline 14 is directly to connect described upper chamber 101.Described first pipeline 13 and described second pipeline 14 are all two-way pipeline, to realize two-way flow.Described first pipeline 13 has the second axis, and described second axis system is arranged along the radial direction of described valve body 1.Described second pipeline 14 has the 3rd axis, and described 3rd axis system is arranged along the radial direction of described valve body 1.In the present embodiment, described first pipeline 13 and described second pipeline 14 are the opposite sides being respectively arranged at described valve body 1, are the left and right sides in figure.
Described core assembly 2 is to be in described accommodating cavity 10.Described core assembly 2 is to be made up of upper needle 21 and 22 two independent parts of lower needle.Described upper needle 21 is to be in described upper valve port 11 position.Described upper needle 21 is to selectively turn on or close described upper valve port 11.Described lower needle 22 is to be in described lower valve port 12 position.Described lower needle 22 is to selectively turn on or close described lower valve port 12.Together with described upper needle 21 is fixably coupled with described lower needle 22, i.e. realization is opened simultaneously, simultaneously closes off, adjusted described upper valve port 11 and the purpose of described lower valve port 12 simultaneously.Specifically, described upper needle 21 has upper needle body 211 and upper sealing 212.On the whole described upper needle body 211 is cap structure.Described upper needle body 211 is to arrange along described first axle, and described upper needle body 211 is in described middle part chamber 102, through described upper valve port 11, extends in described upper chamber 101.Being formed with the first hole on the bottom surface of described upper needle body 211 in the way of upwards caving in, described first hole extends to or close to the end face of described upper needle body 211.Described first hole is divided into upper and lower two sections, and epimere is upper runner hole 2112, and hypomere is combined hole 2113.The internal diameter in described upper runner hole 2112 is less than the internal diameter of described combined hole 2113.The outer peripheral face of described upper needle body 211 has the upper pod apertures 2111 being along the circumferential direction distributed to its upper, and described upper pod apertures 2111 is radially to arrange and be connected with described upper runner hole 2112.Described upper sealing 212 is to be formed at the outer peripheral face of described upper needle body 211 and be in the lower section of described upper pod apertures 2111.Described upper sealing 212 is up-small and down-big cone structure.The apical margin external diameter of described upper sealing 212 is less than the internal diameter of described upper valve port 11, and the root edge external diameter of described upper sealing 212 is more than the internal diameter of described upper valve port 11.Described upper needle body 211 there is the part system of described upper pod apertures 2111 to be in described upper chamber 101, and described upper sealing 212 is the lower section being in described upper valve port 11.Thereby, upper needle 21 described in upward displacement, the gap of described upper sealing 212 and described upper valve port 11 can be gradually reduced, until gap is 0, that is, described upper needle 21 can control through the uninterrupted of described upper valve port 11 and also can thoroughly seal up described upper valve port 11 to cut off the connection of described upper chamber 101 and described middle part chamber 102.Described lower needle 22 has lower needle body 221 and sealing portion 222.On the whole described lower needle body 221 is tubular structure.Described lower needle body 221 is to arrange along first axle, and described lower needle body 221 is in described lower chamber 103, through described lower valve port 12, extend in described middle part chamber 102, in the top of described lower needle body 221 extends to described combined hole 2113 and be combined permanently with the bottom of described upper needle body 211.The through lower flow channel hole 2211 to its end face and bottom surface it is formed with on described lower needle body 221.The internal diameter in described lower flow channel hole 2211 is identical with the internal diameter in described upper runner hole 2112, and described lower flow channel hole 2211 is connected with described upper runner hole 2112.Described sealing portion 222 is to be formed at the outer peripheral face of described lower needle body 221.Described sealing portion 222 is up-small and down-big cone structure, and described upper sealing 212 is identical with the planform of described sealing portion 222, such as, and the parameter such as the length of the conical surface and angle.The apical margin external diameter of described sealing portion 222 is less than the internal diameter of described lower valve port 12, and the root edge external diameter of described sealing portion 222 is more than the internal diameter of described lower valve port 12.Described sealing portion 222 is to be in the lower section of described lower valve port 12.Thereby, lower needle 22 described in upward displacement, the gap of described sealing portion 222 and described lower valve port 12 can be gradually reduced, until gap is 0, that is, described lower needle 22 can control through the uninterrupted of described lower valve port 12 and also can thoroughly seal up described lower valve port 12 to cut off the connection of described middle part chamber 102 and described lower chamber 103.Owing to described upper needle body 211 is fixing combination with described lower needle body 221, therefore, described upper needle 21 and described lower needle 22 are Tong Bu to shift up and down.Further, the gap of described upper sealing 212 and described upper valve port 11, and, described sealing portion 222 is the most identical with the gap of described lower valve port 12, i.e. with opening, Tong Guan, with adjusting.
Describe further, the root edge of described upper sealing 212 is less than the apical margin of described combined hole 2113, described upper needle body 211 is more than described upper needle body 211 in the external diameter of the part of described upper sealing more than 212 in the external diameter of the part of described upper sealing less than 212, the internal diameter of described combined hole 2113 is less than described upper needle body 211 in the external diameter of the part of described upper sealing more than 212, described lower needle body 221 is all identical in the external diameter of the part of described upper sealing more than 212 with described upper needle body 211 in the external diameter of the part of described sealing portion 222 above and below, making described lower needle body 221 is interference fit with described combined hole 2113.Thereby design, effectively increase structural strength.In order to assemble, the root edge of described combined hole 2113 can form guiding chamfering.
Described latch bracket force mechanisms 3 be in described lower chamber 103 in and be positioned at the lower section of described lower needle body 221.Described latch bracket force mechanisms 3 has the first spring 30.Described first spring 30 is to arrange along first axle.The bottom system positioning end of described first spring 30, the top system movable end of described first spring 30.The top of described first spring 30 is in order to support described lower needle body 221.Specifically, the top of described first spring 30 is surrounded on described lower needle body 221 and offsets in the part of described sealing portion less than 222, the end face of described first spring 30 and the bottom surface of described sealing portion 222 or fix combination.
The push rod via 15 connecting described upper chamber 101 it is formed with on the end face of described valve body 1.Described top push rod 4 be in described push rod via 15 in and described top push rod 4 be to arrange along first axle.The bottom surface of described top push rod 4 offsets with the end face of described upper needle body 211 or is combined permanently.In order to seal, at described push rod via 15, can there is sealing mechanism.
The top of shown core assembly 2 is by the extrapolability F of described top push rod 41, the bottom of described core assembly 2 is by towing force F of described first spring 302.The upper and lower displacement of described core assembly 2, makes described upper needle 21, described lower needle 22 synchronize to be turned on and off regulating by valve fluid flow.Further, by extrapolability F1With towing force F2The change of difference power implement, no third power is disturbed, it is ensured that the forward stream of valve and the flow concordance of reverse flow.
The parameter of the parts such as described upper valve port 11, described lower valve port 12, described upper pod apertures 2111, depending on can requiring according to the design of specific product, the most uniquely limits.
Drive the displacement force of described top push rod, various ways can be derived from, such as electronic, hydraulic pressure, pneumatic and thermostatic expansion valve power head expansive force etc..
Flow adjustment range is the nominal maximum stream flow that 0 flow arrives, and be respectively provided with in big flow working region and low discharge working region from clothes regulation traffic engineering capability, owing to balance head piece designs valve port designed size (size of flow) theoretically, little to the change of push rod force needed for spool displacement, mechanism substitutes utilize bivalve to carry out major-minor regulation traffic engineering capability in present system completely, simplifying system control piper, this function is mainly reflected in the design of balance head piece.
Refer to Fig. 1 and 2 again, in order to illustrate flow control device operation principle.
Forward stream: assume that high-pressure fluid inputs with described first pipeline 13, export from described second pipeline 14.Valve port closed mode is shown in that Fig. 1, valve port opening are shown in Fig. 2.The inlet and outlet pressure difference △ P=P of valve1-P2.Described upper needle 21 is stressed poor △ P upwards thrust fOn=△P×πD2/ 4(+), described lower needle 22 is stressed poor △ P down thrust fUnder=△PπD2/ 4(-).Owing to described upper needle 21, described lower needle 22 pressure difference △ P are equal, the internal diameter of described upper valve port 11 is equal with the internal diameter of described lower valve port 12, the equal f of stressOn=fUnder, but Impact direction is contrary, acts on the f=f that makes a concerted effort on described core assembly 2On+fUnder=0,
According to described stress balance principle, valve port is made to have balance head piece characteristic.The most no matter on described, valve port 11 and lower valve port 12 are closed and are in opening or described core assembly 2 and carrying out Flow-rate adjustment state as upper and lower displacement, and during the change of any state, described core assembly 2 is only by extrapolability F1With towing force F2Difference change and change, namely when towing force F2More than extrapolability F1Time, described core assembly 2 shifts up and turns down valve port until completely closing.As extrapolability F1More than towing force F2Time, the described downward in-migration of core assembly 2 opens valve port until maximum.Namely by extrapolability F1Change, change valve port unlatching size carry out flow.
Hereinafter make fluid to be described by the approach of valve.When high-pressure fluid inputs to described middle part chamber 102 from described first pipeline 13, now, the fluid of a part is directly entered described upper chamber 101 by described upper valve port 11, another part enters described lower chamber 103 after described lower valve port 12, then enters described upper chamber 101 by described lower opening, described upper opening, described upper pod apertures 2111.Two parts fluid converges together in described upper chamber 101, finally exports from described second pipeline 14.
Reverse flow: assume that high-pressure fluid inputs from described second pipeline 14, export from described first pipeline 13.According to the Force principle analysis of spool during forward stream, during reverse flow, described upper needle 21 and the described lower needle 22 poor △ P that is stressed is equal equal by thrust, but described upper needle 21 and described lower needle 22 Impact direction are contrary with during forward stream, described upper needle 21 stress FUnderDownwards, described lower needle 22 stress fOnUpwards, fUnderWith fOnMaking a concerted effort to be 0 to cancel each other, therefore during reverse flow, described core assembly 2 is as during forward stream, and no matter described core assembly 2 is in what duty, only by extrapolability F1With towing force F2This two power, makes closedown unlatching or the Flow-rate adjustment of valve port by the change of the difference of this two power.When towing force F3More than extrapolability F4Time, valve port turns down until closing.As extrapolability F1More than towing force F2Time, valve port opens size along with extrapolability F4Change and change.
Hereinafter make fluid to be described by the approach of valve.When high-pressure fluid inputs to described upper chamber 101 from described second pipeline 14, now, the fluid of a part is directly entered described middle part chamber 102 by described upper valve port 11, another part enters described lower chamber 103 through described upper pod apertures 2111, described upper opening, described lower opening, then enters described middle part chamber 102 through described lower valve port 12.Two parts fluid converges together at described middle part chamber 102, finally exports from described first pipeline 13.
When valve is not provided with spring towing force F2, not as extrapolability F1Equilibrant, be only used as the support force of spool weight, described top push rod 4 and described core assembly 2 make coaxial fixed-link, described core assembly 2 by described top push rod 4 in external force F4Effect is lower directly to move up and down, and makes the upper and lower displacement of described core assembly 2, and in change, the aperture of lower valve port 12 carries out Flow-rate adjustment, and the operating characteristic of fluid path valve is consistent with the above.
Referring to Fig. 6, in the second embodiment, relatively front embodiment, change is described upper sealing 212 and described sealing portion 222, does not changes elsewhere.Specifically, described upper sealing 212 is the top being in described upper valve port 11, described upper sealing 212 is little big cone structure under being, the apical margin external diameter of described upper sealing 212 is more than the internal diameter of described upper valve port 11, and the root edge external diameter of described upper sealing 212 is less than the internal diameter of described upper valve port 11；Described sealing portion system is in the top of described lower valve port 12, described sealing portion 222 is little big cone structure under being, the apical margin external diameter of described sealing portion 222 is more than the internal diameter of described lower valve port 12, and the root edge external diameter of described sealing portion 222 is less than the internal diameter of described lower valve port 12.When, under the direction of push rod force, described core assembly 2, when bottom offset, will turn flow down until close port changes contrary with not changing needle taper direction regulation uninterrupted.
Refer to Fig. 7, in the 3rd embodiment, core assembly 2 contrary for about two needle taper directions can be arranged in two different valve pockets of same valve, will first embodiment together with second embodiment combination, in two groups of flow control devices needle due to taper direction contrary, seal valve port direction the most contrary, sealing one group is on valve port top, another group is in valve port bottom, when push rod promotes two groups of spool displacements in the same direction simultaneously, gradually open in valve port for one group and big increase flow until maximum stream flow, another group valve port gradually turns down reduction flow until completely closing.These two groups of spool mechanism combinations can be implemented to control two different pipelines of the state that varies in size flow simultaneously.
Below only have expressed embodiments of the present invention, it describes more concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the bivalve mouth flow control device in expansion valve, it is characterised in that include,
Valve body, there is in it accommodating cavity, in described accommodating cavity, it is formed with upper valve port on described valve body and is in the lower valve port below described upper valve port, making the part being in more than described upper valve port in described accommodating cavity is upper chamber, the part being between described upper valve port and described lower valve port in described accommodating cavity is middle part chamber, the part being in below described lower valve port in described accommodating cavity is lower chamber, the internal diameter of described upper valve port is identical with the internal diameter of described lower valve port, the first pipeline and the second pipeline it has been fixably coupled on described valve body, described first pipeline system connects described middle part chamber, and described second pipeline system connect described upper chamber, there is on described valve body the push rod via connecting described upper chamber；
Core assembly, it is to be in described accommodating cavity, and described core assembly system is made up of upper needle and lower needle, preferably, described upper needle combines regularly with described lower needle system, and described upper needle system is in described upper valve port position, and described lower needle system is in described lower valve port position；And,
Top push rod, it is to be in described push rod via, described top push rod offsets with described upper needle body or is combined permanently, thereby, described top push rod is utilized to shift described spool group so that described upper valve port and described lower valve port optionally can be opened simultaneously, be closed at or adjust flow simultaneously by described core assembly.
Bivalve mouth flow control device in expansion valve the most according to claim 1, it is characterized in that, described upper needle has upper needle body and upper sealing, described upper needle body series extends in described upper chamber from described center lumen indoor through described upper valve port, in the way of upwards caving in, the first hole it is formed with on the bottom surface of described upper needle body, described first hole is divided into, lower two sections, epimere is upper runner hole, hypomere is combined hole, on described upper needle body, there is the upper pod apertures being along the circumferential direction distributed, described upper pod apertures system connects described upper chamber and described upper runner hole, described upper sealing system is formed on the outer peripheral face of described upper needle body；Described lower needle has lower needle body and sealing portion, it is indoor that described lower needle body series extends to described center lumen through described lower valve port in described lower chamber, again, described lower needle body matches in described combined hole, there is on described lower needle body the through lower flow channel hole to its end face and bottom surface, described lower flow channel hole is connected with described upper runner hole, and described sealing portion system is formed on the outer peripheral face of described lower needle body.
Bivalve mouth flow control device in expansion valve the most according to claim 2, it is characterised in that also include,
Latch bracket force mechanisms, it is the lower section being in described lower chamber and being placed in described lower needle body, and described latch bracket force mechanisms has the first spring, and described first spring system is in order to support described lower needle body.
Bivalve mouth flow control device in expansion valve the most according to claim 3, it is characterized in that, described first spring system is arranged along the vertical direction, the top system movable end of described first spring, the top of described first spring is surrounded on described lower needle body part below described sealing portion, the top of described first spring offsets with described sealing portion, the bottom system positioning end of described first spring.
Bivalve mouth flow control device in expansion valve the most according to claim 1 and 2, it is characterized in that, on described first pipeline and the described second pipeline tying outer peripheral face together in described valve body, described first pipeline and described second pipeline all being radially arranged along described valve body.
Bivalve mouth flow control device in expansion valve the most as claimed in any of claims 1 to 5, it is characterized in that, described upper sealing system is in the lower section of described upper valve port, the cone structure that described upper sealing system is up-small and down-big, the apical margin external diameter of described upper sealing is less than the internal diameter of described upper valve port, and the root edge external diameter of described upper sealing is more than the internal diameter of described upper valve port；Described sealing portion system is in the lower section of described lower valve port, and described sealing portion is up-small and down-big cone structure, and the apical margin external diameter of described sealing portion is less than the internal diameter of described lower valve port, and the root edge external diameter of described sealing portion is more than the internal diameter of described lower valve port.
Bivalve mouth flow control device in expansion valve the most according to claim 6, it is characterized in that, the root edge of described upper sealing is less than the apical margin of described combined hole, the external diameter of described upper needle body part below described upper sealing is more than the external diameter of described upper needle body part more than described upper sealing, the internal diameter of described combined hole is less than the external diameter of described upper needle body part more than described upper sealing, described lower needle body is all identical with the external diameter of described upper needle body part more than described upper sealing in the external diameter of the part of described sealing portion above and below, make described lower needle body and described combined hole system interference fit；Further, the root edge of described combined hole is formed with guiding chamfering.
Bivalve mouth flow control device in expansion valve the most as claimed in any of claims 1 to 5, it is characterized in that, described upper sealing system is in the top of described upper valve port, little big cone structure under described upper sealing system, the apical margin external diameter of described upper sealing is more than the internal diameter of described upper valve port, and the root edge external diameter of described upper sealing is less than the internal diameter of described upper valve port；Described sealing portion system is in the top of described lower valve port, little big cone structure under described sealing portion system, and the apical margin external diameter of described sealing portion is more than the internal diameter of described lower valve port, and the root edge external diameter of described sealing portion is less than the internal diameter of described lower valve port.
Bivalve mouth flow control device in expansion valve the most as claimed in any of claims 1 to 8, it is characterised in that described expansion valve series electron expansion valve or heating power expansion valve.
10. expansion valve, it is characterised in that include, the flow control device described in claim 1 to 9, it is preferable that the quantity of described flow control device has and only a group, and more preferably, the quantity of described flow control device has two groups.
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| CN201610354752.7A CN105889590B (en) | 2016-05-26 | 2016-05-26 | Bivalve mouth flow control device and expansion valve in expansion valve |
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| CN201610354752.7A CN105889590B (en) | 2016-05-26 | 2016-05-26 | Bivalve mouth flow control device and expansion valve in expansion valve |
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| CN105889590B CN105889590B (en) | 2017-12-22 |
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| CN201615246U (en) * | 2010-03-29 | 2010-10-27 | 上海恒温控制器厂有限公司 | Double-valve port mechanism for flow control valve |
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| JP2002295709A (en) * | 2001-03-29 | 2002-10-09 | Isuzu Motors Ltd | Flow rate control valve |
| US20070193629A1 (en) * | 2006-02-17 | 2007-08-23 | Emerson Electric Co. | Thermostatic expansion valve with check valve |
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| CN105889590B (en) | 2017-12-22 |
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