CN107435744B - Static seal transmission type gate valve with inclined plane alloy seal and slag removal structure - Google Patents
Static seal transmission type gate valve with inclined plane alloy seal and slag removal structure Download PDFInfo
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- CN107435744B CN107435744B CN201710841230.4A CN201710841230A CN107435744B CN 107435744 B CN107435744 B CN 107435744B CN 201710841230 A CN201710841230 A CN 201710841230A CN 107435744 B CN107435744 B CN 107435744B
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- 230000003068 static effect Effects 0.000 title claims abstract description 78
- 230000005540 biological transmission Effects 0.000 title claims abstract description 36
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 19
- 239000000956 alloy Substances 0.000 title claims abstract description 19
- 239000002893 slag Substances 0.000 title claims description 28
- 238000007789 sealing Methods 0.000 claims abstract description 156
- 125000006850 spacer group Chemical group 0.000 claims description 22
- 238000005520 cutting process Methods 0.000 claims description 15
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000000670 limiting effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 230000002829 reductive effect Effects 0.000 claims description 6
- RENIMWXTRZPXDX-UHFFFAOYSA-N [Ti].[Ni].[W] Chemical compound [Ti].[Ni].[W] RENIMWXTRZPXDX-UHFFFAOYSA-N 0.000 claims description 4
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 4
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 claims description 3
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000003818 cinder Substances 0.000 abstract description 7
- 230000006978 adaptation Effects 0.000 abstract 1
- 230000009471 action Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 231100000004 severe toxicity Toxicity 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/12—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with wedge-shaped arrangements of sealing faces
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0227—Packings
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
- Details Of Valves (AREA)
Abstract
The utility model provides a static seal transmission type gate valve with inclined plane alloy is sealed and structure of scarfing cinder, including power drive, magnetic drive, the valve body, case and neck flange, power drive is connected with magnetic drive, magnetic drive is connected with the valve, even there is the neck flange valve body lower part one side, the inside case passageway that establishes of valve body, the inside medium passageway that intersects perpendicularly with case passageway axis of establishing of valve body and neck flange, still be equipped with the scarfing cinder passageway with medium passageway intercommunication in the valve body, the case is the toper structure, case passageway lower part is the toper structure with the case adaptation, the case is installed in the case passageway, establish inclined plane dynamic seal structure between case one side and the neck flange opposite face, the case opposite side is equipped with multiunit elastic component. The invention forms a reliable inner and outer sealing structure by the static sealing structure and the conical structure and the inclined plane dynamic sealing structure which are combined with the valve core and the valve core channel, effectively prevents the valve from leaking outwards, and solves the problems of high leakage rate, short service life and high cost of the existing valve.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to a static seal transmission type gate valve with an inclined plane alloy seal and slag removal structure.
Background
In nuclear power industry, petrochemical industry and national standard, the requirements on the internal and external leakage rate levels of media with strong corrosivity, strong radioactivity and severe toxicity in the processes of storage and pipeline transportation are very strict. However, in the actual work, due to the sealing problem of the valve, especially under the conditions of high temperature and high pressure, the valve is limited by the conditions of sealing materials, sealing structures, radioactivity, sealing acting force, manufacturing process and the like, and the requirement of national standards is difficult to achieve by adopting the domestic valve. The imported valve has short service life and extremely high purchase price due to the problems of abrasion and scratch of a sealing surface, and greatly improves the cost. There is therefore a need for improvements.
Disclosure of Invention
The technical problems solved by the invention are as follows: the invention provides a static seal transmission type gate valve with an inclined plane alloy seal and slag removal structure, which can enable a valve sealing surface to be more tightly attached through an inclined plane movable seal structure between a neck flange and a valve core and a conical structure of a valve core and a valve core channel, and is combined with three static seal structures of the valve, so that the valve forms a reliable internal and external seal structure, the outward leakage of the valve is effectively prevented, and the problems that the internal and external leakage rate level of the existing domestic valve cannot meet the national standard requirement, the service life of an imported valve is short, and the cost is high are solved.
The technical scheme adopted by the invention is as follows: a static seal transmission type gate valve with an inclined plane alloy seal and slag removal structure comprises a power driving device, a magnetic transmission device, a valve body, a valve core and a neck flange, wherein the output end of the power driving device is connected with the input end of the upper end of the magnetic transmission device, the lower end of the magnetic transmission device is fixedly connected with the upper end of the valve body in a static seal way, one side of the lower part of the valve body is connected with the neck flange in a sealing way, a valve core channel is axially arranged in the valve body, a medium channel with the axis vertical to the axis of the valve core channel is arranged in the valve body and the neck flange, a slag removal channel communicated with the medium channel is also arranged in the valve body, the valve core is of a conical structure with the section diameter gradually reduced from top to bottom, the upper part of the valve core channel is of a cylindrical structure, the lower part of the valve core channel is of a conical structure matched with the outer surface of the valve core, the valve core is installed inside the valve core channel of the valve body, the output end of the magnetic transmission device is connected with the upper end of the valve core through a lead screw and drives the valve core to move up and down along the valve core channel, and when the valve core moves down to be matched and attached with the conical structure at the lower part of the valve core channel, the medium in the medium channel is cut off and conducted, an inclined moving sealing structure which forms a rigid sealing pair when the valve core moves down to the lower limit of the valve core channel is arranged between one side of the valve core and the opposite surface of the flange with a neck, and a plurality of groups of elastic assemblies which are in rolling contact with the inner surface of the valve core channel and provide sealing force for the inclined moving sealing structure are arranged on the other side of the valve core.
The inclined plane moving seal structure comprises a static seal body and a moving seal body, a cutting plane is arranged on one side, corresponding to the necked flange, of the valve core, the moving seal body is embedded on the cutting plane, one face, opposite to the necked flange, of the moving seal body extends to the lower portion of the valve core along with the lower portion of the valve core and is close to the moving seal inclined plane inclined to the axis of the valve core, the necked flange is fixedly connected with the valve body, the facing surfaces of the necked flange and the valve body are in sealing connection through a sealing ring I, the static seal body is fixed on one end face, opposite to the cutting plane, of the necked flange, extends into the valve body, an end face is screwed with a pressing nut pressing the static seal body, the static seal body is sealed through a sealing ring II between the facing surfaces of the static seal body and the necked flange, and the face, opposite to the cutting plane of the static seal body and the valve core is a static seal inclined plane tightly attached to the moving seal body and the moving seal inclined plane when the valve core moves down to the lower limit of a valve core channel.
Furthermore, the static sealing body and the dynamic sealing body are both made of high-hardness tungsten-nickel-titanium alloy.
Furthermore, the medium channel comprises a medium inlet section channel which is arranged in the valve body and the axis of the medium inlet section channel is parallel to the axis of the valve core channel, a medium outlet section channel which is arranged in the valve body and the axis of the medium outlet section channel is vertically crossed with the axis of the valve core channel, and a medium channel hole which is arranged in the neck flange and the axis of the medium channel hole is coaxial with the medium outlet section channel, and the medium inlet section channel and the medium outlet section channel are communicated end to end; one end of the slag removal channel is vertically communicated with the medium inlet section channel, and the other end of the slag removal channel is communicated with the bottom of the valve core channel.
The valve comprises a valve body, a valve core channel, a plurality of elastic assemblies, a neck flange and a valve core, wherein the elastic assemblies adopt a magnetic spring structure, each elastic assembly comprises a magnetic spring and a ball, one side of the valve core opposite to the neck flange is provided with a mounting blind hole, the magnetic spring is arranged in the mounting blind hole, and the outer end of the magnetic spring is connected with the ball which is in rolling contact with the surface of a cylinder in the valve core channel in the valve body.
Furthermore, the magnetic spring is composed of two permanent magnets with the same polarity on adjacent surfaces, and the two permanent magnets are made of samarium cobalt permanent magnet materials.
Further, the number of the elastic component installation groups is determined according to the property of media in the gate valve and the working pressure and is not less than 4.
The magnetic transmission device comprises a support, a spacer bush, an outer rotor and an inner rotor, wherein the outer rotor and the inner rotor are magnetic devices, the outer rotor is sleeved inside the support, the inner rotor is sleeved inside the outer rotor and between the outer rotor and the inner rotor, the lower end of the support is fixedly connected with the upper end of a valve body, the lower end of the spacer bush is tightly pressed on the valve body through a spigot inside the lower end of the support, the spacer bush is sealed with a valve body facing surface through a sealing ring III, the inner rotor is connected with a driving screw rod through an internal thread and an external thread at the upper end of the screw rod to move up and down, and the lower end of the screw rod is movably connected with a T-shaped groove formed at the upper end of the valve core and drives the valve core to move up and down along a valve core channel.
Further, the power driving device comprises a motor, a coupler and a motor support, the upper end of the motor support is fixedly connected with a motor shell, the lower end of the motor support is fixedly connected with the upper end of a support in the magnetic transmission device, one end of the coupler is fixedly connected with a motor output shaft, and the other end of the coupler is fixedly connected with a power input shaft at the upper end of an outer rotor in the magnetic transmission device.
Furthermore, a limiting block is fixed on the upper part of the valve core channel.
Compared with the prior art, the invention has the advantages that:
1. in the scheme, the power of the motor is transmitted in a non-contact way through a rotating magnetic field between the outer rotor and the inner rotor, and the outer rotor and the inner rotor are separated by the spacer bush, so that the static seal between the spacer bush and the valve body through the seal ring III replaces the dynamic seal between the traditional transmission shaft and the valve body; the neck flange is fixedly connected with the valve body, and the facing surfaces of the neck flange and the valve body are in static sealing connection through a sealing ring I; a static sealing structure is formed between the joint surface of the static sealing body and the neck flange through a sealing ring II; the static sealing structure formed by the three sealing rings and the inclined plane dynamic sealing structure combined between the neck flange and the valve core and the conical structure of the valve core and the valve core channel form a reliable internal and external sealing structure, effectively prevent the valve from leaking outside, and solve the problems that the internal and external leakage rate level of the existing domestic valve cannot meet the national standard requirement, the service life of the imported valve is short, and the cost is high;
2. in the scheme, the valve core is made into a conical structure with the diameter of the cross section gradually reduced from top to bottom, the lower part of the valve core channel is made into a conical structure matched with the outer surface of the valve core, the surface of the movable sealing body, which is sealed and attached with the static sealing body, is made into an inclined surface, and the valve core moves to the lower part of the valve core channel, so that the surfaces at the two positions can be attached more tightly by combining the conical structure with the inclined surface structure;
3. in the scheme, the static sealing body and the dynamic sealing body in the dynamic and static sealing structure both adopt high-hardness tungsten-nickel-titanium alloy, so that the sealing surface is not easily scratched in the relative movement process of the static sealing body and the dynamic sealing body, and the service life of the gate valve is greatly prolonged;
4. in the scheme, a plurality of groups of elastic assemblies are arranged on one side of the valve core opposite to the neck flange, the elastic assemblies adopt a magnetic spring structure consisting of a magnetic spring and balls, and the balls are in rolling contact with the inner cylindrical surface of the valve core channel under the action of repulsion force of the magnetic spring, so that the friction force of the valve core moving in the valve core channel is reduced; meanwhile, when the valve core moves downwards to enable the static sealing body and the movable sealing body to be relatively attached and sealed, the magnetic spring repulsive force made of high-temperature-resistant permanent magnet materials provides enough sealing force required by sealing at low pressure for the static sealing body and the movable sealing body, and the high hardness, wear resistance, high temperature resistance, high pressure resistance, corrosion resistance and irradiation resistance of the materials of the static sealing body and the movable sealing body are combined, so that good rigid inner sealing of valve plane contact is realized;
5. this scheme is equipped with the scarfing cinder passageway in valve body inside, scarfing cinder passageway one end communicates with medium entrance passageway is perpendicular, the scarfing cinder passageway other end and case passageway bottom intercommunication, the valve is opened, under the medium flow state, some medium flows along medium passage, and another part medium flows in case passageway bottom along the scarfing cinder passageway, upwards flow along case passageway after blowing up the dregs that case passageway bottom precipitated, finally converge medium passage and blow off the dregs that will precipitate from the export, through this kind of scarfing cinder mode, dregs in the medium have been avoided deposiing in the valve body, prevent that dregs from piling up influence case downstream, and then influence the valve closure, can also prevent the sealed face of stereoplasm granule damage alloy in the dregs.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged schematic view of the structure of the valve core and valve body and the inclined plane dynamic sealing structure of the present invention;
fig. 3 isbase:Sub>A partial structural sectional view taken along linebase:Sub>A-base:Sub>A of fig. 1.
Detailed Description
Embodiments of the present invention are described below with reference to fig. 1-3.
A static seal transmission type gate valve with an inclined plane alloy seal and slag removal structure is shown in figure 1 and comprises a power driving device 21, a magnetic transmission device 22, a valve body 16, a valve core 17 and a neck-mounted flange 1.
The output end of the power driving device 21 is connected with the input end of the upper end of the magnetic transmission device 22. Specifically, as shown in fig. 1, power drive device 21 includes motor 10, shaft coupling 11 and motor support 12, motor support 12 plays the effect of supporting the motor, the casing fixed connection of fastener and motor 10 is passed through to motor support 12 upper end, motor support 12 lower extreme passes through fastener and magnetic transmission device 22 upper end fixed connection, shaft coupling 11 one end is through ordinary flat key and motor 10 power take off axle fixed connection, power input end fixed connection in shaft coupling 11 other end passes through fastener and magnetic transmission device 22.
The lower end of the magnetic transmission device 22 is fixedly connected with the upper end of the valve body 16 in a sealing way. Specifically, as shown in fig. 1, the magnetic transmission device 22 includes a bracket 6, a spacer 7, an outer rotor 8 and an inner rotor 9, wherein the bracket 6 functions to press the spacer 7 and support the motor 10, and the outer rotor 8 and the inner rotor 9 are magnetic devices. The upper end of the bracket 6 is fixedly connected with a motor support 12 in the power driving device 21 through a fastener so as to support the motor 10, and the lower end of the bracket 6 is fixedly connected with the upper end of the valve body 16 through a fastener. The outer rotor 8 is sleeved inside the support 6, and a power input shaft at the upper part of the outer rotor 8 is fixedly connected with the lower end of the coupler 11, so that the motor 10 drives the outer rotor 8 to rotate; the inner rotor 9 is sleeved inside the outer rotor 8, a spacer 7 is arranged between the outer rotor 8 and the inner rotor 9, the lower end of the spacer 7 is pressed on the valve body 16 through a spigot 601 in the support 6, the spacer 7 and the valve body 16 are sealed through a sealing ring III 15, the spacer 7 and the sealing ring III 15 are together used for separating an inner cavity of the gate valve from an external space, the static sealing structure is used for replacing the dynamic sealing between the traditional transmission shaft and the valve body, and the sealing performance is improved.
As shown in fig. 2, the valve core 17 is a tapered structure with a gradually decreasing cross-sectional diameter from top to bottom, a valve core passage 1601 is axially arranged in the valve body 16, the upper portion of the valve core passage 1601 is a cylindrical structure and the lower portion thereof is a tapered structure adapted to the outer surface of the valve core 17, and the valve core 17 is installed in the valve core passage 1601 of the valve body 16. The upper portion of the valve core channel 1601 is fixed with a limiting block 14 through a fastener, an inner rotor 9 in the magnetic transmission device 22 drives the valve core 17 through a lead screw 13 to move up and down along the valve core channel 1601 and realize cutting off and conducting of a medium in the valve when the valve core 17 moves down to be matched and attached with the lower portion of the valve core channel 1601 so that the conical structures of the valve core and the valve core are matched, wherein the inner rotor 9 is connected with an external thread at the upper end of the lead screw 13 through an internal thread, and the lower end of the lead screw 13 penetrates through the limiting block 14 to be movably connected with a T-shaped groove formed at the upper end of the valve core 17.
One side of the lower portion of the valve body 16 is hermetically connected with a neck flange 1, the neck flange 1 is fixedly connected with the valve body 16 through a fastener, the mutually-attached surfaces of the neck flange 1 and the valve body 16 are hermetically connected through a sealing ring I2, and one end face, connected with the valve body 16, of the neck flange 1 penetrates into a corresponding hole in the valve body 16 and is arranged at the corresponding edge of the valve core channel 1601.
The valve body 16 and the neck flange 1 are internally provided with a medium channel 23, the axis of which is perpendicular to the axis of the valve core channel 1601, and the medium channel 23 is of a cylindrical structure. Specifically, as shown in fig. 1, the medium passage 23 includes a medium inlet passage 1602 provided in the lower portion of the valve body 16 and having an axis parallel to the axis of the spool passage 1601, a medium outlet passage 1603 provided in the valve body 16 and having an axis perpendicular to the axis of the spool passage 1601, and a medium passage hole 101 provided in the neck flange 1 and having an axis coaxial with the medium outlet passage 1603, the medium inlet passage 1602 and the medium outlet passage 1603 are connected, and the medium outlet passage 1603 is connected to the medium passage hole 101 through the spool passage 1601.
The valve body 16 is further provided with a slag removal channel 1604 communicated with the medium channel 23, as shown in fig. 1, an axis of the slag removal channel 1604 is perpendicular to an axis of the medium inlet section channel 1602 and is parallel to an axis of the medium outlet section channel 1603, one end of the slag removal channel 1604 is perpendicular to the medium inlet section channel 1602, and the other end of the slag removal channel 1604 is communicated with the bottom of the valve core channel 1601. The valve is opened, in a medium flowing state, a part of medium flows into the valve body 16 from the valve inlet a and then flows along the medium channel 23, the other part of medium flows into the bottom of the valve core channel 1601 from the slag removal channel 1604, dregs deposited at the bottom of the valve core channel 1601 flow upwards along the valve core channel 1601 after being blown up, finally the medium channel 23 is gathered, and the deposited dregs are blown out from the outlet b, through the slag removal mode, the dregs in the medium are prevented from being deposited in the valve body 16, the phenomenon that the dregs are accumulated to influence the downward movement of the valve core 17 and further influence the closing of the valve is avoided, and hard particles in the dregs can also be prevented from damaging an alloy sealing surface.
And an inclined movable sealing structure 24 which forms a rigid sealing pair when the valve core 17 moves downwards to the lower limit of the valve core channel 1601 is arranged between one side of the valve core 17 and the opposite surface of the neck flange 1. Specifically, as shown in fig. 2, the inclined movable sealing structure 24 includes a static sealing body 4 and a movable sealing body 18, a cutting plane 1701 is formed on one side of the valve core 17 corresponding to the necked flange 1, the movable sealing body 18 is embedded in the cutting plane 1701, one side of the movable sealing body 18 opposite to the necked flange 1 is a movable sealing inclined surface 1801 which is inclined towards the axis of the valve core 17 along with extending towards the lower part of the valve core 17, the static sealing body 4 is fixed on one end surface of the necked flange 1 extending into the valve body 16 and opposite to the cutting plane 1701, one end of the necked flange 1 extending into the valve body 16 is provided with a thread, a compression nut 5 is screwed with the thread at the end of the necked flange 1 to compress the static sealing body 4, a sealing ring ii 3 is used for sealing between the abutting surface of the static sealing body 4 and the necked flange 1, and one side of the static sealing body 4 opposite to the cutting plane 1701 of the valve core 17 is a static sealing inclined surface 401 which is adapted to and tightly attached to the movable sealing inclined surface 1801 when the valve core 17 moves downwards to the lower limit of the valve core channel 1601. According to the invention, the valve core 17 is made into a conical structure with the diameter of the section gradually reduced from top to bottom, the lower part of the valve core channel 1601 is made into a conical structure matched with the outer surface of the valve core 17, the surface of the movable sealing body 18, which is hermetically attached to the static sealing body 4, is made into an inclined surface, and the valve core 17 moves downwards to the lower part of the valve core channel 1601, through the combination of the conical structure and the inclined surface, the surfaces at two positions can be attached more tightly, the attachment of the valve core 17 and the conical surface of the valve core channel 1601 can also provide a certain sealing force for the attachment of the movable sealing body 18 and the static sealing body 4, and the conical structure can compensate the problem of the reduction of the sealing performance caused by the abrasion of the inclined surface movable sealing body 24, so that the sealing performance of the valve is further improved.
Preferably, the static sealing body 4 and the dynamic sealing body 18 are both made of high-hardness tungsten-nickel-titanium alloy, so that the sealing surfaces are not easily scratched in the relative movement process of the static sealing body 4 and the dynamic sealing body 18, and the service life of the gate valve is greatly prolonged.
The other side of the valve core 17 is provided with a plurality of groups of elastic components 25 which are in rolling contact with the inner surface of the valve core channel 1601 and provide sealing force for the dynamic sealing structure 24. Wherein, the number of the elastic components 25 is determined according to the property of the medium in the gate valve and the working pressure and is not less than 4. Specifically, as shown in fig. 3, the elastic assemblies 25 are of a magnetic spring structure, each set of elastic assemblies 25 includes a magnetic spring 20 and a ball 19, a blind installation hole 1702 is formed in one side of the valve core 17 opposite to the neck flange 1, the magnetic spring 20 is arranged in the blind installation hole 1702, and the outer end of the magnetic spring 20 is connected with the ball 19 which is in rolling contact with the inner cylindrical surface of the valve core channel 1601 in the valve body 16. Preferably, the magnetic spring 20 is composed of two permanent magnets with the same polarity on the adjacent surfaces, and the two permanent magnets are made of samarium cobalt permanent magnet materials. The balls 19 are in rolling contact with the inner cylindrical surface of the valve core channel 1601 under the action of the repulsive force of the magnetic spring 20, so that the friction force of the valve core 17 moving in the valve core channel 1601 is reduced; meanwhile, when the valve core 17 moves downwards to enable the static sealing body 18 and the static sealing body 4 to be attached to form a rigid sealing pair, the repulsion force generated by the magnetic spring 20 made of high-temperature resistant permanent magnetic materials provides enough sealing force required by sealing at low pressure for the static sealing body 4 and the dynamic sealing body 18, and good rigid internal sealing of valve plane contact is realized by combining the high hardness, wear resistance, high temperature resistance, high pressure resistance, corrosion resistance and irradiation resistance of the materials of the static sealing body 4 and the dynamic sealing body 18.
The power transmission route of the invention is as follows: the motor 10 drives the outer rotor 8 in the magnetic transmission device 22 to rotate through the coupling 11, the outer rotor 8 drives the inner rotor 9 to rotate through the spacer 7 through a rotating magnetic field of the outer rotor, the rotation of the inner rotor 9 drives the lead screw 13 to axially move along the valve core channel 1601 through the thread matching between the inner rotor and the lead screw 13, and then the valve core 17 is driven to axially move along the valve core channel 1601 of the valve body 16. In this way, when the motor 10 rotates, the valve core 17 moves axially along the valve core passage 1601. When the motor 10 rotates clockwise, the valve core 17 moves downwards or upwards; when the motor rotates counterclockwise, the spool 17 moves upward or downward.
The medium cutting and conducting function and the sealing function of the invention are realized in the following modes: the valve core 17 moves downwards under the driving of the motor 10, when the conical outer surface of the valve core 17 is matched and attached to the conical surface at the lower part of the valve core channel 1601, the valve core 17 stops moving, at this time, the dynamic seal inclined plane 1801 on the dynamic seal body 18 is completely overlapped and attached to the static seal inclined plane 401 on the static seal body 4 in the neck flange 1, and a rigid seal pair is formed under the spring force action of the magnetic spring 20, so that the medium flow is completely cut off, the gate valve is closed, and the medium cutting function of the gate valve is realized. At this time, the valve body 16, the static sealing body 4, the dynamic sealing body 18, the spacer 7 and the sealing ring 15 form a pressure boundary in a valve closing state, the spacer 7, the valve body 16 and the sealing ring iii 15 form an outer leakage prevention sealing pair, and the static sealing body 4 and the dynamic sealing body 18 form an inner leakage prevention sealing pair. The sealing force when the static seal body 4 and the dynamic seal body 18 form a rigid seal pair is the magnetic spring force and the medium pressure of the magnetic spring 20 and the sealing force formed by the conical surface contact between the valve body 17 and the valve body passage 1601. When the medium is high-pressure, the sealing force is mainly the pressure of the medium; in the case of low-pressure medium, the magnetic spring force is the main force.
When the valve core 17 moves upwards under the driving of the motor 10, the upper edge of the valve core 17 contacts the lower end face of the limiting block 14, the valve core 17 reaches the upper limiting position and stops moving, at the moment, the movable sealing body 18 is staggered with the static sealing body 4 in the neck flange 1, the medium channel 23 is completely opened, the medium flows and is conducted, the gate valve is opened, and the medium conduction function of the gate valve is realized. At the moment, the valve body 16, the sealing ring I2, the static sealing body 4, the neck flange 1, the spacer 7 and the sealing ring III 15 form a pressure boundary in a valve opening state, and the spacer 7, the valve body, the sealing ring III 15, the static sealing body 4, the sealing ring I2 and the neck flange 1 respectively form an anti-leakage sealing pair.
The working process of the invention is as follows: starting the motor 10, driving the outer rotor 8 to rotate by the motor 10, enabling the inner rotor 9 to rotate synchronously, driving the valve core 17 to ascend by the screw 13, separating a sealing pair formed by the static sealing body 4 and the dynamic sealing body 18, powering off when the valve core 17 reaches an upper limit stroke, and communicating a medium channel on the valve body 16 with a medium channel hole 101 on the neck flange 1 to open the valve; when the valve needs to be closed, the motor 10 is reversed, the lead screw 13 drives the valve core 17 to descend, when the conical outer surface of the valve core 17 is matched and attached to the conical surface at the lower part of the valve core channel 1601, the inclined surfaces of the static sealing body 4 and the dynamic sealing body 18 are completely contacted, and under the action of medium pressure, magnetic spring force and conical surface contact sealing force of the valve core 17 and the valve core channel 1601, a rigid sealing pair is formed, medium circulation is cut off, and the valve is closed.
The sealing structure of the invention is as follows: the power of the motor 10 is transmitted in a non-contact way through a rotating magnetic field between the outer rotor 8 and the inner rotor 9, and the outer rotor 8 and the inner rotor 9 are separated by the spacer 7, so that the static seal between the spacer 7 and the valve body 16 through the seal ring III 15 replaces the dynamic seal between the traditional transmission shaft and the valve body; the neck flange 1 is fixedly connected with the valve body 16, and the facing surfaces of the neck flange 1 and the valve body 16 form static sealing connection through a sealing ring I2; and a static sealing structure formed by a sealing ring II 3 is arranged between the static sealing body 4 and the joint surface of the neck flange 1. The static sealing structure formed by the three sealing rings, the inclined movable sealing structure between the neck-mounted flange and the valve core and the conical combination structure of the valve core and the valve core channel are combined, so that a reliable internal and external sealing structure is formed, the outward leakage of the valve is effectively prevented, and the problems that the internal and external leakage rate level of the existing domestic valve cannot meet the national standard requirement, the service life of an imported valve is short and the cost is high are solved.
The above-mentioned embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and therefore, all equivalent changes made by the contents of the claims of the present invention should be included in the claims of the present invention.
Claims (10)
1. Static seal transmission formula gate valve with inclined plane alloy is sealed and slag removal structure, including power drive (21), magnetic drive (22), valve body (16), case (17) and hubbed flange (1), power drive (21) output is connected with magnetic drive (22) upper end input, magnetic drive (22) lower extreme and valve body (16) upper end static seal fixed connection, valve body (16) lower part one side sealing connection has hubbed flange (1), its characterized in that: a valve core channel (1601) is axially arranged in the valve body (16), a medium channel (23) with the axis thereof vertical to the axis of the valve core channel (1601) is arranged in the valve body (16) and the neck flange (1), a slag removal channel (1604) communicated with the medium channel (23) is also arranged in the valve body (16), the valve core (17) is a conical structure with the section diameter gradually reduced from top to bottom, the upper part of the valve core channel (1601) is of a cylindrical structure, the lower part of the valve core channel is of a conical structure matched with the outer surface of the valve core (17), the valve core (17) is arranged in a valve core channel (1601) of the valve body (16), the output end of the magnetic transmission device (22) is connected with the upper end of the valve core (17) through a lead screw (13) and drives the valve core (17) to move up and down along the valve core channel (1601) and realize the cut-off and conduction of the medium in the medium channel (23) when the valve core (17) moves down to be matched and attached with the conical structure at the lower part of the valve core channel (1601), an inclined movable sealing structure (24) which forms a rigid sealing pair when the valve core (17) moves downwards to the lower limit of the valve core channel (1601) is arranged between one side of the valve core (17) and the opposite surface of the neck flange (1), and a plurality of groups of elastic assemblies (25) which are in rolling contact with the inner surface of the valve core channel (1601) and provide sealing force for the inclined movable sealing structure (24) are arranged on the other side of the valve core (17).
2. The static seal transmission gate valve with a bevel alloy seal and slag removal structure as claimed in claim 1, wherein: the inclined surface dynamic sealing structure (24) comprises a static sealing body (4) and a dynamic sealing body (18), a cutting plane (1701) is arranged on one side of the valve core (17) corresponding to the neck flange (1), the dynamic sealing body (18) is embedded on a cutting plane (1701), one surface of the dynamic sealing body (18) opposite to the necked flange (1) is a dynamic sealing inclined surface (1801) which is inclined towards the axis of the valve core (17) along with the extension of the dynamic sealing body towards the lower part of the valve core (17), the neck flange (1) is fixedly connected with the valve body (16), the facing surfaces of the neck flange (1) and the valve body (16) are hermetically connected through a sealing ring I (2), the static sealing body (4) is fixed on one end surface of the neck flange (1) extending into the valve body (16) and opposite to the cutting plane (1701), a compression nut (5) for compressing the static sealing body (4) is screwed on one end of the neck-equipped flange (1) extending into the valve body (16) through threads, the joint surface of the static sealing body (4) and the neck flange (1) is sealed by a sealing ring II (3), the surface of the static sealing body (4) opposite to the cutting plane (1701) of the valve core (17) is a static sealing inclined surface (401) which is matched and attached to the dynamic sealing inclined surface (1801) when the valve core (17) moves downwards to the lower limit of the valve core channel (1601).
3. The static seal transmission gate valve with a bevel alloy seal and slag removal structure as claimed in claim 2, wherein: the static sealing body (4) and the dynamic sealing body (18) are both made of high-hardness tungsten-nickel-titanium alloy.
4. The static seal transmission gate valve with a bevel alloy seal and slag removal structure according to claim 1, 2 or 3, wherein: the medium channel (23) comprises a medium inlet section channel (1602) arranged in the valve body (16) and an axis of the medium inlet section channel parallel to an axis of the valve core channel (1601), a medium outlet section channel (1603) arranged in the valve body (16) and an axis of the medium outlet section channel perpendicular to the axis of the valve core channel (1601), and a medium channel hole (101) arranged in the neck flange (1) and an axis of the medium outlet section channel (1603) coaxial with the medium inlet section channel (1602) and the medium outlet section channel (1603) are communicated; one end of the slag removal channel (1604) is vertically communicated with the medium inlet section channel (1602), and the other end of the slag removal channel (1604) is communicated with the bottom of the valve core channel (1601).
5. The static seal transmission gate valve with the bevel alloy seal and the slag removal structure as claimed in claim 1, wherein: the elastic assembly (25) adopts a magnetic spring structure, each elastic assembly (25) comprises a magnetic spring (20) and a ball (19), one side, opposite to the necked flange (1), of the valve core (17) is provided with a mounting blind hole (1702), the magnetic spring (20) is arranged in the mounting blind hole (1702), and the outer end of the magnetic spring (20) is connected with the ball (19) which is in rolling contact with the inner cylindrical surface of a valve core channel (1601) in the valve body (16).
6. The static seal transmission gate valve with a bevel alloy seal and slag removal structure as claimed in claim 5, wherein: the magnetic spring (20) is composed of two permanent magnets with the same polarity on adjacent surfaces, and the two permanent magnets are made of samarium cobalt permanent magnet materials.
7. The static seal transmission gate valve with a bevel alloy seal and slag removal structure according to claim 1, 5 or 6, wherein: the number of the elastic components (25) is determined according to the property of the medium in the gate valve and the working pressure and is not less than 4.
8. The static seal transmission gate valve with a bevel alloy seal and slag removal structure as claimed in claim 1, wherein: magnetic drive device (22) are including support (6), spacer (7), outer rotor (8) and inner rotor (9) are the magnetic device, outer rotor (8) cover is inside in support (6), inner rotor (9) cover is equipped with spacer (7) between outer rotor (8) inside and outer rotor (8) and inner rotor (9), support (6) lower extreme and valve body (16) upper end fixed connection, spigot (601) of support (6) lower extreme inside compresses tightly spacer (7) lower extreme on valve body (16), it is sealed through sealing washer III (15) between spacer (7) and the valve body (16) looks wainscot, inner rotor (9) through internal thread and threaded connection drive lead screw (13) of lead screw (13) upper end reciprocate, lead screw (13) lower extreme and the T type groove swing joint who makes in case (17) upper end and drive case (17) and reciprocate along case passageway (1601).
9. The static seal transmission gate valve with a bevel alloy seal and slag removal structure as claimed in claim 8, wherein: power drive unit (21) include motor (10), shaft coupling (11) and motor support (12), motor support (12) upper end and the casing fixed connection of motor (10), support (6) upper end fixed connection in motor support (12) lower extreme and magnetic drive device (22), shaft coupling (11) one end and motor (10) output shaft fixed connection, the power input shaft fixed connection of outer rotor (8) upper end in shaft coupling (11) other end and magnetic drive device (22).
10. The static seal driven gate valve with a bevel alloy seal and slag removal structure as claimed in claim 9, wherein: a limiting block (14) is fixed to the upper portion of the valve core channel (1601).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710841230.4A CN107435744B (en) | 2017-09-18 | 2017-09-18 | Static seal transmission type gate valve with inclined plane alloy seal and slag removal structure |
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| CN201710841230.4A CN107435744B (en) | 2017-09-18 | 2017-09-18 | Static seal transmission type gate valve with inclined plane alloy seal and slag removal structure |
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| CN107435744A CN107435744A (en) | 2017-12-05 |
| CN107435744B true CN107435744B (en) | 2023-03-14 |
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| CN110482052B (en) * | 2019-08-15 | 2024-07-19 | 江苏鑫华能环保工程股份有限公司 | Valve structure of particulate matter and liquid mixture storage bin and storage bin |
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| CN207229806U (en) * | 2017-09-18 | 2018-04-13 | 宝鸡泰华磁机电技术研究所有限公司 | Static seal driven type gate valve with inclined-plane alloy seal and scarfing cinder structure |
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| RU2009135809A (en) * | 2007-02-28 | 2011-04-10 | Ай Ти Ти Мэньюфэкчуринг Энтерпрайзиз, Инк. (Us) | HOLE PLACED INSIDE VALVE STOCK |
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