CN117072699A - Cock type electronic expansion valve - Google Patents
Cock type electronic expansion valve Download PDFInfo
- Publication number
- CN117072699A CN117072699A CN202311033502.XA CN202311033502A CN117072699A CN 117072699 A CN117072699 A CN 117072699A CN 202311033502 A CN202311033502 A CN 202311033502A CN 117072699 A CN117072699 A CN 117072699A
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- valve
- end cover
- hole
- shaft
- valve core
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- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 10
- 239000010935 stainless steel Substances 0.000 claims abstract description 10
- 230000033228 biological regulation Effects 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 102
- 239000010687 lubricating oil Substances 0.000 claims description 16
- 239000003921 oil Substances 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000007774 longterm Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 210000004907 gland Anatomy 0.000 claims 1
- 230000001050 lubricating effect Effects 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000005461 lubrication Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
- F16K31/535—Mechanical actuating means with toothed gearing for rotating 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
- F16K5/0407—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
- F16K5/0457—Packings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Lift Valve (AREA)
Abstract
The utility model provides a plug type electronic expansion valve, which comprises a valve body, a valve core shaft and an end cover arranged at the upper end of the valve body through a screw, wherein the lower end of the valve core shaft is arranged in a guide hole of the valve body, the bottom end surface of the valve core shaft is abutted with the bottom surface of the guide hole through a stainless steel gasket, the bottom surface of the end cover is provided with an end cover inner hole, and the top end of the valve core shaft penetrates through the end cover inner hole and is connected with a driving system; the valve body is connected with the limiting pin in a matched mode through a first limiting surface and a second limiting surface at the lower end of the end cover, and limiting is carried out on two limiting positions of flow regulation of the valve. The plug type electronic expansion valve provided by the utility model improves the tightness of the electronic expansion valve, and through the integrated design of the valve core and the valve rod, when the valve is opened/closed, the valve core and the valve rod shaft are started, the force transmission between the valve core and the valve rod shaft does not exist, and the phenomenon that the surface is worn in advance due to overlarge stress at the edge part caused by uneven specific pressure distribution on the contact surface does not exist.
Description
Technical Field
The utility model belongs to the technical field of expansion valves, and particularly relates to a plug type electronic expansion valve.
Background
The development requirement of the air conditioning system structure is that the number of valves is reduced as much as possible under the premise of meeting the function of the system, and the electronic expansion valve in the air conditioner needs to be circulated bidirectionally, so that the full-through pressure is reduced. The existing ball valve has small all-pass pressure drop due to the symmetrical structure of an inlet and an outlet, meets the requirement of an air conditioner framework on the valve for multiple functions, and is more and more applied, and the existing ball valve has poor sealing performance due to the fact that the sealing performance is spherical sealing, and moreover, the valve core and a sealing piece are subjected to processing and assembly errors, so that the sealing performance of the valve is poor, the sealing structure of the valve is complex, and the assembly is troublesome; meanwhile, the existing needle valve cannot be used as a valve with a large valve port diameter due to the influence of a structure, and the function is more limited.
The utility model of China with the application number 031167071 discloses a valve rod integrated ball valve, wherein a valve rod is integrated with a valve core, a sealing structure is arranged between the valve rod and a body, the sealing structure is that a bushing is sleeved on the valve rod, and a filler is filled between the body and the valve rod at the upper part of the bushing; in the scheme, the valve rod and the valve core are separated through the bushing and the filler, so that the problem of separation of the valve rod and the valve core of a common ball valve is solved, but the processing and assembling difficulties of the valve core are high, the bushing is unstable, and the position of the bushing is changed after long-time use; in addition, although the rotation of the valve stem can be achieved by rotation of the handle, the angle of rotation is not controllable.
Chinese utility model of application number CN2018206818366 discloses a valve needle assembly and an electronic expansion valve having the same, providing a valve needle assembly comprising a valve stem, a valve needle, an elastic element and a stopper structure, the valve needle being coupled to the valve stem and being axially movable relative to the valve stem; in the scheme, the needle valve is combined with the expansion valve, and the on-off is realized through the up-and-down movement of the valve rod, but the expansion valve of the needle valve structure has small common caliber and larger all-pass pressure drop.
The Chinese patent with the application number of CN2022213328635 discloses a novel angle valve with an integrated valve core, wherein the integrated valve core is manufactured by adopting an integrated forming process, has higher structural strength because the surface of the integrated valve core is free of connecting gaps such as welding and the like, and is not easy to break and wear in the use process; but its tightness is not very good and the total pressure drop is large, similar to the needle valve structure.
The Chinese patent application No. CN2011204650053 discloses a novel regulating valve, wherein a valve sleeve is arranged on a valve rod at the lower end of a valve cover, and a connector is arranged at the lower end of the valve sleeve, but the valve sleeve has no sealing effect and has a single function.
The Chinese patent application No. CN2016206197978 discloses a regulating valve for a steam turbine, which is provided with a valve core and a valve sleeve, but belongs to a needle valve structure in essence, and has small outlet flow.
The Chinese patent application No. 2004100181465 discloses an electric ball valve, which is provided with a valve body, a valve rod, a valve core and a stop structure, but is inconvenient to process and has high wear rate.
Therefore, in summary, the present solution is expected to combine the advantages of the ball valve and the needle valve, and apply the ball valve and the needle valve in the expansion valve, so as to solve the technical problems of poor tightness, larger friction and larger processing and installation difficulty of the electronic expansion valve, so as to achieve the multifunctional technical effect.
Disclosure of Invention
The utility model aims to provide a plug type electronic expansion valve, which solves the technical problem of how to improve the tightness of the electronic expansion valve, and forms an integrated valve core shaft structure through the integrated design of a valve core and a valve rod, in addition, the valve core of the valve core shaft and the valve rod shaft are designed and processed together, the assembly gap between the valve core and the valve rod does not exist, when the valve is opened/closed, the valve core and the valve rod shaft are started, the force transmission between the valve core and the valve rod shaft does not exist, the phenomenon that the surface is worn in advance due to overlarge stress at the edge part caused by uneven specific pressure distribution on the contact surface is avoided, and the service life of the valve is long; the integrated design of the valve core and the valve rod also ensures the consistency of the upper torque center and the lower torque center of the valve core shaft, avoids the position deviation and is beneficial to ensuring the good tightness.
The plug type electronic expansion valve comprises a valve body, a valve core shaft and an end cover, wherein the end cover is fastened at the upper end of the valve body through a screw, the lower end of the valve core shaft is arranged in a guide hole of the valve body, the bottom end surface of the valve core shaft is abutted with the bottom surface of the guide hole through a stainless steel gasket, and abrasion of the valve core shaft to the bottom surface of the guide hole in long-term operation is eliminated;
the valve body is characterized in that a valve assembly mounting cavity is formed in the upper end face of the valve body, the valve assembly mounting cavity is arranged above the guide hole and is coaxially arranged with the guide hole, a main body sealing sleeve is coaxially arranged on the inner side of the valve assembly mounting cavity, and a valve core on the valve core shaft is in interference fit connection with an inner hole of the main body sealing sleeve;
the bottom surface of the end cover is provided with an end cover inner hole, and the top end of the valve core shaft penetrates through the end cover inner hole and is connected with a power system;
and the first limiting surface and the second limiting surface at the lower end of the end cover are respectively connected with the limiting pin in a matched manner to limit two limiting positions of flow regulation of the valve.
The valve core shaft comprises the valve core, guide shafts and limiting shafts which are coaxially arranged on two end faces of the valve core respectively, a valve rod which is coaxially connected with the outer end face of the limiting shaft, and a connecting square shaft which is coaxially connected with the outer end face of the valve rod, wherein a limiting pin hole is formed in the outer circular face of the limiting shaft, the limiting pin hole is connected with the end cover through a limiting pin, and the connecting square shaft penetrates through an inner hole of the end cover and is connected with the driving system;
the valve is characterized in that a valve hole is further formed in the outer side of the valve core, a valve body valve hole a and a valve body valve hole b are formed in the valve body and in two opposite sides of the valve assembly mounting cavity respectively, a valve interface I is formed in the outer side of the valve body valve hole a, a valve interface II is formed in the outer side of the valve body valve hole b, and the valve hole, the valve body valve hole a and the valve body valve hole b, the valve interface I and the valve interface II are formed in the outer side of the valve body valve hole bActivitySymmetrical expansion grooves are respectively arranged at two ends of the valve hole and positioned on the same vertical plane, and the sectional area of each expansion groove linearly decreases along with the distance from the valve hole;
the outer side surface of the valve rod is provided with a lubrication groove, a lubrication oil chamber is defined between the lubrication groove and an inner hole of the end cover, and the outer side surface of the end cover is provided with an oil injection hole communicated with the lubrication oil chamber.
The pressure refrigerant in the utility model flows through the holes of the three parts positioned in the same plane, and the flowing direction of the refrigerant is not changed, thereby reducing the pressure difference between the inlet and the outlet of the valve.
The step surface a between the valve rod and the limiting shaft is abutted with the limiting hole bottom surface b of the end cover through a stainless steel gasket, so that abrasion of the valve core shaft to the limiting hole bottom surface b of the end cover in long-term operation is eliminated.
The inner sealing device is characterized in that an inner lower sealing piece and an inner upper sealing piece are arranged between the inner hole of the end cover and the valve rod, the inner lower sealing piece and the inner upper sealing piece are respectively positioned on the upper side and the lower side of the lubricating oil chamber and used for preventing leakage of a high-pressure working medium between the main body sealing sleeve and the valve core on the valve core shaft and preventing leakage of lubricating oil in the lubricating oil chamber through a gap between the valve core shaft and the inner hole of the end cover.
And a bottom sealing piece is arranged between the guide shaft and the guide hole, so that high-pressure working medium leaked from a gap between the main body sealing sleeve and the valve core is prevented from flowing to the bottom end surface of the valve core shaft, and the upward thrust acted on the bottom end surface of the valve core shaft by the high-pressure working medium is eliminated.
The main body sealing sleeve is arranged between the valve assembly mounting cavity and the valve core, and the bottom end surface of the main body sealing sleeve is abutted with the bottom surface f of the valve assembly mounting cavity to perform axial downward limiting;
one end of the main body sealing sleeve is a tooth-shaped positioning end surface, the tooth-shaped positioning end surface is matched with an end cover positioning tooth to position the main body sealing sleeve in the circumferential direction and the upward direction, so that the alignment of a medium through hole on the main body sealing sleeve with the first valve interface and the second valve interface of the valve body is ensured, the main body sealing sleeve is prevented from rotating in the valve assembly mounting cavity, the axial upper end of the main body sealing sleeve is limited, and the end cover positioning tooth is arranged at the bottom surface position of the end cover;
the upper end face and the lower end face of the outer circular surface of the main body sealing sleeve are respectively provided with a balance groove I and a balance groove II, and the balance groove I and the balance groove II are used for balancing the pressure of the upper end and the lower end of the valve core cavity so as to prevent pressure difference from being generated at the upper end and the lower end of the valve core, the valve core is pushed to the upper end or the lower end to increase friction resistance, and the rotation torque of the valve core shaft during rotation is increased.
The outer circular surface of the end cover is inserted into the upper end of the valve assembly mounting cavity, the positioning and fixing surface of the end cover is abutted with the upper end surface of the valve body, and the axial lower end of the end cover is positioned;
an outer lower sealing piece and an outer upper sealing piece are arranged between the outer circular surface of the end cover and the valve assembly mounting cavity, so that leakage of high-pressure medium and lubricating oil from a gap between the outer circular surface of the end cover and the valve assembly mounting cavity of the valve body is prevented.
The driving system comprises a speed reducing mechanism and an electric control assembly;
the speed reducing mechanism comprises a gear train coaxially connected with the connecting square shaft and a speed reducer shell coaxially connected with the end cover flange;
the electric control assembly comprises a motor connected with the gear train and a circuit board connected with the motor through a plug connector.
The utility model achieves the following remarkable effects:
(1) In the scheme, the valve core of the valve core shaft and the valve rod shaft are designed and processed together, an assembly gap between the valve core and the valve rod does not exist, when the valve is opened/closed, the valve core and the valve rod shaft are started, force transmission between the valve core and the valve rod shaft does not exist, the phenomenon that the surface is worn in advance due to overlarge stress at the edge part caused by uneven specific pressure distribution (larger extrusion stress at the edge part which is closer to the valve rod) on the contact surface does not exist, and therefore the service life of the valve is long; in addition, the valve core and the valve rod form an integrated structure, so that the position deviation of split type connection of the valve core and the valve rod in the past is avoided, the position precision is improved, the angle error generated during rotation is reduced, and good tightness of the valve core and the valve rod is guaranteed.
(2) The valve core shaft is of an integrated structure formed by a valve core and a valve rod, the lower end of the valve core shaft is provided with a guide shaft, the valve core shaft is inserted into a valve assembly mounting cavity, the guide shaft of the valve core shaft is arranged in a guide hole of a valve body, the bottom end surface of the valve core shaft is abutted with the bottom surface of the guide hole of the valve body through a stainless steel gasket, and abrasion of the bottom end of the valve core shaft facing the bottom surface of the guide hole during rotation is eliminated;
the valve rod shaft of the valve core shaft is arranged in the inner hole of the end cover, the outer circle of the end cover is inserted into the upper end of the valve component mounting cavity of the valve body, the end cover supports and guides the upper part of the valve core shaft, when the valve is closed, the pressure of a high-pressure working medium to the valve core is transmitted to the end cover and the valve body through the valve rod shaft and the guide shaft of the valve core shaft, the valve core of the valve core shaft does not rotate or move around the valve rod connecting point of the valve core, namely, the valve core is not pressed towards one side port of the valve by the high-pressure working medium, namely, the condition of single-side sealing does not exist, so the sealing performance is good, and the valve can bear high pressure;
(3) The main body sealing sleeve is arranged in the scheme, and has the following technical effects:
the main body sealing sleeve is designed into an integral sealing piece and is connected with the valve core through interference fit, so that the gap between the main body sealing sleeve and the valve core of the valve core shaft is reduced, the sealing performance between the main body sealing sleeve and the valve core of the valve core shaft is improved, and the gap which is not matched with the shape between the sealing surface and the sealed surface and is caused by the fact that the main body sealing sleeve is not assembled in place is avoided, so that the sealing effect of the valve is good;
secondly, the integral main body sealing sleeve is matched with the integral valve core shaft, so that the situation of uneven pressure caused by the fact that the valve core is not concentric with the main body sealing sleeve due to the fact that the valve core is not concentric with the valve shaft is avoided, the pressure between the valve core shaft and the main body sealing sleeve is even, when the valve core shaft rotates, friction force between the valve core shaft and the main body sealing sleeve is even, friction force is small, and rotation torque of the valve core shaft is small;
the main body sealing sleeve with integral design has the advantages of simple shape and structure, high productivity, high processing precision, high qualification rate and low processing cost, and can be processed by adopting general equipment;
fourthly, the main body sealing sleeve is matched with the end cover, in particular, positioning teeth of the end cover are inserted into tooth-shaped grooves of tooth-shaped positioning end faces of the main body sealing sleeve, and the main body sealing sleeve is positioned in the circumferential direction; the positioning teeth of the end cover are tightly pressed in the tooth-shaped grooves of the tooth-shaped positioning surface of the main body sealing sleeve to limit the upper row of the main body sealing sleeve;
(4) In the scheme, the limiting pin is arranged and matched with the limiting surface of the end cover to limit two limiting positions when the valve core shaft is regulated, when the limiting pin is abutted with the limiting surface I at the lower end of the end cover, the valve is fully closed, and when the limiting pin is abutted with the limiting surface II at the lower end of the end cover, the valve is fully communicated and matched with the expansion tank, so that the linear regulation of the refrigerant flow is realized, and the full-communication pressure drop is reduced;
(5) The technical scheme is specially used for an air conditioning system, the cock type structure is applied to the expansion valve, the defect that the sealing effect of the ball valve or the column valve is poor is avoided, the defects of small aperture and small flow of the needle valve are avoided, and unexpected technical effects are generated.
Drawings
Fig. 1-general sectional view.
Fig. 2-cross-sectional view of the actuator.
Fig. 3-section A-A of fig. 2 (section view of the stop structure when the valve is closed).
Fig. 4-section B-B of fig. 2 (valve fully closed section).
Fig. 5-section C-C of fig. 2 (cross-sectional view of the limiting structure when the valve is fully open).
Fig. 6-section D-D of fig. 2 (valve full-through section).
Fig. 7-schematic structural view of the valve body.
Fig. 8-cross-sectional view of a central section of the valve body.
Fig. 9-schematic structural diagram of the valve spindle.
Fig. 10-front view of the valve spindle.
Fig. 11-fig. 10 are cross-sectional views F-F.
Fig. 12-fig. 11 are G-G cross-sectional views.
Figure 13-schematic structural view of the body seal cartridge.
Figure 13-1-structural schematic diagram of the body seal cartridge.
Fig. 14-schematic structural view of the end cap.
Fig. 15-schematic structural diagram of top view of end cap.
Fig. 16-15 are H-H cross-sectional views.
Figure 17-schematic diagram of the connection of the end cap, spool shaft and body seal cartridge.
Wherein, the reference numerals are as follows: 1-a valve body; 2-a main body sealing sleeve; 3-valve interface one; 4-a valve core shaft; 5-an expansion tank; 6-limiting pins; 7-end caps; 8-oil filling holes; 9-a lubricating oil chamber; 10-stainless steel gaskets; 11. a bottom seal; 13. an inner lower seal; 14. an outer lower seal; 15. an outer upper seal; 16. an inner upper seal; 17-side seal; 12-stainless steel washers; 18-valve interface two; 21-screws; 37-limit surface I; 38-a second limiting surface; 42-valve upper end face; 45-valve assembly mounting cavity; 46-valve body valve hole a; 47-valve body valve bore b; 48-guiding holes; 49-the end face of the spool shaft bottom; 50-guiding shaft; 51-bottom seal groove; 52-valve core; 53-limiting shaft; 54-valve stem; 55-lubrication grooves; 56-connecting a square shaft; 57-limit pin holes; 58-the outer circle of the main body sealing sleeve; 59-a body seal cartridge bore; 60-dielectric vias; 61-bottom end face; 62-tooth-shaped positioning end faces; 63-balancing groove one; 631. a balancing groove II; 64-positioning teeth; 65. an end cap flange; 67-an end cap inner hole; 68-end cap outer circle; 69. a first seal groove; 70. sealing grooves II; 72. sealing grooves III; 73-positioning the fixing surface.
Detailed Description
In order to more clearly describe the technical characteristics of the present solution, the present solution is described below by means of specific embodiments.
Referring to fig. 1-17, a plug type electronic expansion valve comprises a valve body 1, a valve core shaft 4 and an end cover 7 connected to the upper end of the valve body 1 through a screw 21, wherein the lower end of the valve core shaft 4 is arranged in a guide hole 48 of the valve body 1, and the bottom end surface 61 of the valve core shaft 4 is abutted with the bottom surface of the guide hole 48 through a stainless steel gasket 10;
the upper end face of the valve body 1 is provided with a valve assembly mounting cavity 45, the valve assembly mounting cavity 45 is arranged above the guide hole 48 and is coaxially arranged with the guide hole, the inner side of the valve assembly mounting cavity 45 is coaxially provided with a main body sealing sleeve 2, and a valve core 52 on the valve core shaft 4 is in interference fit connection with an inner hole of the main body sealing sleeve 2;
the bottom surface of the end cover 7 is provided with an end cover inner hole 67, and the top end of the valve core shaft 4 passes through the end cover inner hole 67 and is connected with a driving system;
the valve core shaft 4 is respectively connected with the limiting pin 6 in a matched manner through a limiting surface I37 and a limiting surface II 38 at the lower end of the end cover 7, and limits two limiting positions of flow regulation of the valve.
Specifically, the end cap 7 is in turn fastened to the valve upper end surface 42 of the valve body 1 by means of screws 21.
The valve core shaft 4 comprises a valve core 52, a guide shaft 50 and a limit shaft 53 which are coaxially arranged on two end surfaces of the valve core 52 respectively, a valve rod 54 which is coaxially connected with the outer end surface of the limit shaft 53, and a connection square shaft 56 which is coaxially connected with the outer end surface of the valve rod 54, wherein a limit pin hole 57 is formed on the outer circular surface of the limit shaft 53, the limit pin hole 57 is connected with an end cover 7 through a limit pin 6, and the connection square shaft 56 passes through an end cover inner hole 67 and is connected with a driving system;
the valve core 52 is also provided with a valve hole 36 on the outer side, a valve body valve hole a46 and a valve body valve hole b47 are respectively arranged on two opposite sides in the valve assembly mounting cavity 45, a valve interface I3 is arranged on the outer side of the valve body valve hole a46, a valve interface II 18 is arranged on the outer side of the valve body valve hole b47, the valve hole 36, the sealing sleeve hole 60, the valve body valve hole a46, the valve body valve hole b47, the valve interface I3 and the valve interface II 18 are movably positioned on the same vertical plane, symmetrical expansion grooves 5 are respectively arranged on the valve core 52 and at two ends of the valve hole 36, and the cross section area of the expansion grooves 5 is linearly reduced along with the distance from the valve hole 36;
wherein the expansion tank 5 has a width L and an average depth h, see fig. 11 and 12.
The outer side surface of the valve rod 54 is provided with a lubrication groove 55, a lubrication oil chamber 9 is enclosed between the lubrication groove 55 and an inner hole 67 of the end cover, and the outer side surface of the end cover 7 is provided with an oil injection hole 8 communicated with the lubrication oil chamber 9.
The step surface a between the valve rod 54 and the limiting shaft 53 is abutted with the limiting hole bottom surface b of the end cover 7 through the stainless steel gasket 12, so that abrasion of the valve core shaft to the limiting hole bottom surface b of the end cover during operation is eliminated.
An inner lower sealing element 13 and an inner upper sealing element 16 are arranged between the end cover inner hole 67 and the valve rod 54, and the inner lower sealing element 13 and the inner upper sealing element 16 are respectively positioned on the upper side and the lower side of the lubricating oil chamber 9 and used for preventing leakage of high-pressure working medium between the main body sealing sleeve 2 and the valve core 52 in the valve core shaft 4 and preventing leakage of lubricating oil in the lubricating oil chamber 9 through a gap between the valve core shaft 4 and the end cover inner hole 67.
Specifically, a second seal groove 70 is formed in the inner side surface of the end cover from top to bottom, and the inner lower seal member 13 and the inner upper seal member 16 are respectively clamped in the second seal groove 70.
A bottom seal 11 is provided between the guide shaft 50 and the guide hole 48, a bottom seal groove 51 is provided at the side portion of the guide shaft 50, the bottom seal 11 is embedded in the bottom seal groove 51, and high-pressure working medium leaking from between the main body seal cartridge 2 and the valve element 52 is prevented from flowing to the bottom end surface 61 of the valve element shaft 4, so that upward thrust force acting on the valve element shaft bottom end surface 49 by the high-pressure working medium is increased.
A gap is reserved between the step surface e between the guide shaft 50 and the valve core 52 and the bottom surface f of the valve assembly mounting cavity 45 so as to prevent friction between the step surface e and the valve assembly mounting cavity bottom surface f and increase the rotation resistance of the valve core shaft 4.
The main body sealing sleeve 2 is arranged between the valve assembly mounting cavity 45 and the valve core 52, and the bottom end surface 61 of the main body sealing sleeve 2 is abutted with the bottom surface f of the valve assembly mounting cavity 45 to perform axial downward limiting;
one end of the main body sealing sleeve 2 is a tooth-shaped positioning end face 62, the tooth-shaped positioning end face 62 is matched with positioning teeth 64 of the end cover 7 to position the main body sealing sleeve 2 in the circumferential direction and upward direction, so that a medium through hole 60 on the main body sealing sleeve 2 can be communicated with a valve interface I3, a valve interface II 18 and a valve hole 36 of the valve body 1 to prevent the main body sealing sleeve 2 from rotating in the valve assembly mounting cavity 45, and meanwhile, the axial upper end of the main body sealing sleeve 2 is limited, and the positioning teeth 64 of the end cover 7 are arranged at the bottom surface position of the end cover 7;
the outer circular surface 58 and the bottom end surface 61 of the main body sealing sleeve are provided with a first balance groove 63 and a second balance groove 631, and the first balance groove 63 and the second balance groove 631 are used for balancing the pressure of the upper end and the lower end of the cavity of the valve core 52 so as to prevent pressure difference between the upper end and the lower end of the valve core 52 from being generated, push the valve core 52 to the upper end or the lower end to increase friction resistance and increase rotation torque when the valve core shaft 4 rotates.
The shape of the inner hole 59 of the main body sealing sleeve is matched with that of the valve core 52, and the inner hole 59 of the main body sealing sleeve is in interference fit with the valve core 52, so that the sealing area is large, the sealing clearance is small due to interference fit, and when the valve is fully closed, the leakage of the valve is small, namely the sealing performance of the valve is good.
The outer circular surface of the end cover 7 is inserted into the upper end of the valve assembly mounting cavity 45, the positioning and fixing surface 73 of the end cover 7 is abutted with the upper end surface of the valve body 1, and the axial lower end of the end cover 7 is positioned;
an outer lower sealing element 14 and an outer upper sealing element 15 are arranged between the outer circular surface of the end cover 7 and the valve assembly mounting cavity 45 to prevent high-pressure medium and lubricating oil from leaking from a gap between the outer circular surface 68 of the end cover and the valve assembly mounting cavity 45 of the valve body 1, specifically, a first sealing groove 69 is respectively arranged on the outer circular surface of the end cover 7 from top to bottom, and the outer lower sealing element 14 and the outer upper sealing element 15 are respectively clamped in the first sealing groove 69;
specifically, the positioning teeth 64 of the end cover 7 are inserted into the tooth-shaped grooves of the tooth-shaped positioning end face 62 of the main body sealing sleeve 2 to position the main body sealing sleeve 2 in the circumferential direction, the positioning teeth 64 of the end cover 7 are pressed in the tooth-shaped grooves of the tooth-shaped positioning surface on the main body sealing sleeve 2 to limit the upward movement of the main body sealing sleeve 2.
An end cover flange 65 is coaxially arranged on the end cover 7, the outer side of the end cover 7 is connected with the inner side of the speed reducer shell, a side sealing piece 17 is arranged between the end cover 7 and the speed reducer shell, a sealing groove III 72 is arranged on the outer side face of the end cover flange 65, and the side sealing piece 17 is clamped in the sealing groove III 72.
The speed reducer housing is a component on the driving system, and the side sealing piece 17 is used for preventing air with certain humidity from entering the valve assembly from the outside and preventing icing, so that the valve core shaft 4 can normally operate in the hole of the end cover 7.
The driving system comprises a speed reducing mechanism and an electric control assembly;
the speed reducing mechanism comprises a gear train coaxially connected with the connecting square shaft 56 and a speed reducer shell coaxially connected with the end cover flange 65;
the electric control assembly comprises a motor connected with the gear train and a circuit board connected with the motor through a plug connector.
The power system in this solution is a technology that is easy for a person skilled in the art to operate and implement, and its specific driving control method may be determined according to an actual application situation, which is not described in detail herein.
The technical features of the present utility model that are not described in the present utility model may be implemented by or using the prior art, and are not described in detail herein, but the above description is not intended to limit the present utility model, and the present utility model is not limited to the above examples, but is also intended to be within the scope of the present utility model by those skilled in the art.
Claims (9)
1. The plug type electronic expansion valve is characterized by comprising a valve body (1), a valve core shaft (4) and an end cover (7) arranged at the upper end of the valve body (1) through a screw (21), wherein the lower end of the valve core shaft (4) is arranged in a guide hole (48) of the valve body (1), the bottom end surface (61) of the valve core shaft (4) is abutted with the bottom surface of the guide hole (48) through a stainless steel gasket (10), and the lower end of the valve core shaft (4) is limited in the axial direction;
the valve comprises a valve body (1), and is characterized in that a valve assembly mounting cavity (45) is formed in the upper end face of the valve body (1), the valve assembly mounting cavity (45) is arranged above the guide hole (48) and is coaxially arranged with the guide hole, a main body sealing sleeve (2) is coaxially arranged on the inner side of the valve assembly mounting cavity (45), and a valve core (52) on the valve core shaft (4) is in interference fit connection with an inner hole of the main body sealing sleeve (2);
an end cover inner hole (67) is formed in the bottom surface of the end cover (7), and the top end of the valve core shaft (4) penetrates through the end cover inner hole (67) and is connected with a driving system;
and a first limiting surface (37) and a second limiting surface (38) at the lower end of the end cover (7) are respectively connected with the limiting pin (6) in a matched manner to limit two limiting positions of flow regulation of the valve.
2. The plug type electronic expansion valve according to claim 1, wherein the valve core shaft (4) comprises the valve core (52), a guide shaft (50) and a limiting shaft (53) which are coaxially arranged on two end faces of the valve core (52), a valve rod (54) coaxially connected with the outer end face of the limiting shaft (53), and a connecting square shaft (56) coaxially connected with the outer end face of the valve rod (54), a limiting pin hole (57) is formed in the outer circular face of the limiting shaft (53), the limiting pin hole (57) is connected with the end cover (7) through a limiting pin (6), and the connecting square shaft (56) penetrates through an inner hole (67) of the end cover and is connected with the driving system;
the valve is characterized in that a valve hole (36) is further formed in the outer side of the valve core (52), a valve body valve hole a (46) and a valve body valve hole b (47) are formed in the valve body (1) and in two opposite sides of the valve assembly mounting cavity (45), a valve interface I (3) is formed in the outer side of the valve body valve hole a (46), a valve interface II (18) is formed in the outer side of the valve body valve hole b (47), the valve hole (36), the valve body valve hole a (46) and the valve body valve hole b (47), the valve interface I (3) and the valve interface II (18) are located on the same vertical surface, symmetrical expansion grooves (5) are formed in the valve core (52) and in two ends of the valve hole (36) respectively, and the cross section area of the expansion grooves (5) linearly decreases along with the distance from the valve hole (36);
the lubricating oil chamber (9) is enclosed between the lubricating groove (55) and the inner hole (67) of the end cover, and the oil injection hole (8) communicated with the lubricating oil chamber (9) is arranged on the outer side surface of the end cover (7).
3. A tap-type electronic expansion valve according to claim 2, characterised in that the step surface a between the valve rod (54) and the limiting shaft (53) is abutted against the limiting hole bottom surface b of the end cover (7) through a stainless steel gasket (12), so that abrasion of the step surface a of the limiting shaft (53) to the limiting hole bottom surface b of the end cover (7) caused by the valve core shaft (4) in long-term rotation is avoided.
4. A tap-type electronic expansion valve according to claim 3, characterised in that an inner lower seal (13) and an inner upper seal (16) are arranged between the end cover inner bore (67) and the valve rod (54), the inner lower seal (13) and the inner upper seal (16) are respectively arranged at the upper side and the lower side of the lubricating oil chamber (9) and used for preventing leakage of high-pressure working medium between the main body sealing sleeve (2) and the upper valve core (52) of the valve core shaft (4) and preventing leakage of lubricating oil in the lubricating oil chamber (9) through a gap between the valve core shaft (4) and the end cover inner bore (67).
5. A tap-type electronic expansion valve according to claim 2, characterised in that a bottom seal (11) is provided between the pilot shaft (50) and the pilot hole (48) to prevent high pressure working medium leaking out from between the main body gland (2) and the valve spool (52) from flowing to the spool shaft bottom end face (49) of the pilot shaft (50) so as to eliminate the upward thrust exerted on the spool shaft bottom end face (49) by the high pressure working medium.
6. The plug type electronic expansion valve according to claim 4, wherein one end of the main body sealing sleeve (2) is a tooth-shaped positioning end face (62), the tooth-shaped positioning end face (62) is matched with positioning teeth (64) on an end cover (7), the main body sealing sleeve (2) is positioned in the circumferential direction and in the upward direction, a medium through hole (60) on the main body sealing sleeve (2) is aligned with a first valve interface (3) and a second valve interface (18) on the valve body (1), the main body sealing sleeve (2) is prevented from rotating in the valve assembly mounting cavity (45), the axial upper end of the main body sealing sleeve (2) is limited, and the positioning teeth (64) are arranged at the bottom surface position of the end cover (7);
the outer circular surface (58) and the lower end surface of the main body sealing sleeve are respectively provided with a balance groove I (63) and a balance groove II (631), and the balance groove I (63) and the balance groove II (631) are used for balancing the pressure of the upper end and the lower end of the cavity of the valve core (52) so as to avoid pressure difference between the upper end and the lower end of the valve core (52).
7. The plug type electronic expansion valve according to claim 6, wherein the outer circular surface of the end cover (7) is inserted into the upper end of the valve assembly mounting cavity (45), the positioning and fixing surface of the end cover (7) is abutted against the upper end surface of the valve body (1), and the axial lower end of the end cover (7) is positioned.
8. An outer lower sealing piece (14) and an outer upper sealing piece (15) are arranged between the outer circular surface of the end cover (7) and the valve assembly installation cavity (45), so that leakage of high-pressure medium from a gap between the end cover outer circular surface (68) and the valve assembly installation cavity (45) is prevented, and leakage of lubricating oil in the lubricating oil chamber (9) through the end cover oil filling hole (8) and the gap between the end cover outer circular surface (68) and the valve assembly installation cavity (45) is prevented.
9. The plug-type electronic expansion valve of claim 2, wherein said drive system comprises a speed reducing mechanism and an electronic control assembly;
the speed reducing mechanism comprises a gear train coaxially connected with the connecting square shaft (56) and a speed reducer shell coaxially connected with the end cover flange (65);
the electric control assembly comprises a motor connected with the gear train and a circuit board connected with the motor through a plug connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311033502.XA CN117072699B (en) | 2023-08-16 | 2023-08-16 | Cock type electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311033502.XA CN117072699B (en) | 2023-08-16 | 2023-08-16 | Cock type electronic expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117072699A true CN117072699A (en) | 2023-11-17 |
| CN117072699B CN117072699B (en) | 2024-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311033502.XA Active CN117072699B (en) | 2023-08-16 | 2023-08-16 | Cock type electronic expansion valve |
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| Country | Link |
|---|---|
| CN (1) | CN117072699B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB534610A (en) * | 1939-05-23 | 1941-03-12 | Lewis Mervyn Cecil Seamark | Improvements relating to valves |
| CN103791115A (en) * | 2014-02-28 | 2014-05-14 | 荆昭 | Novel foot-operated type water-saving switch |
| CN209781720U (en) * | 2019-03-18 | 2019-12-13 | 建湖县鸿达阀门管件有限公司 | 140Mpa superhigh pressure dismantles plug valve fast |
| CN214534585U (en) * | 2020-12-24 | 2021-10-29 | 济南朵琳新能源科技有限公司 | CO2Plug valve in air conditioning system |
| CN214838530U (en) * | 2021-05-27 | 2021-11-23 | 苏州青华铁路配件有限公司 | Two-way ventilation pressure valve for rail transit with large temperature bearing range |
| EP4008936A1 (en) * | 2020-12-01 | 2022-06-08 | Robert Bosch GmbH | Valve for controlling a fluid flow |
| CN218818290U (en) * | 2022-12-13 | 2023-04-07 | 浙江德氟阀门有限公司 | Plug valve with stable sealing performance |
-
2023
- 2023-08-16 CN CN202311033502.XA patent/CN117072699B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB534610A (en) * | 1939-05-23 | 1941-03-12 | Lewis Mervyn Cecil Seamark | Improvements relating to valves |
| CN103791115A (en) * | 2014-02-28 | 2014-05-14 | 荆昭 | Novel foot-operated type water-saving switch |
| CN209781720U (en) * | 2019-03-18 | 2019-12-13 | 建湖县鸿达阀门管件有限公司 | 140Mpa superhigh pressure dismantles plug valve fast |
| EP4008936A1 (en) * | 2020-12-01 | 2022-06-08 | Robert Bosch GmbH | Valve for controlling a fluid flow |
| CN214534585U (en) * | 2020-12-24 | 2021-10-29 | 济南朵琳新能源科技有限公司 | CO2Plug valve in air conditioning system |
| CN214838530U (en) * | 2021-05-27 | 2021-11-23 | 苏州青华铁路配件有限公司 | Two-way ventilation pressure valve for rail transit with large temperature bearing range |
| CN218818290U (en) * | 2022-12-13 | 2023-04-07 | 浙江德氟阀门有限公司 | Plug valve with stable sealing performance |
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| Publication number | Publication date |
|---|---|
| CN117072699B (en) | 2024-08-23 |
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