CN105508627A - High-pressure pipeline manual balance type valve - Google Patents
High-pressure pipeline manual balance type valve Download PDFInfo
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- CN105508627A CN105508627A CN201510992808.7A CN201510992808A CN105508627A CN 105508627 A CN105508627 A CN 105508627A CN 201510992808 A CN201510992808 A CN 201510992808A CN 105508627 A CN105508627 A CN 105508627A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a high-pressure pipeline manual balance type valve which mainly comprises a valve body, a valve cover, a large valve rod, a stuffing pressure cover, a valve clack, a piston, a small valve element, a spring, a piston blocking ring and a hand wheel. According to the high-pressure pipeline annual balance type valve disclosed by the invention, fluid pressure balance is carried out by utilizing a balance cavity which is composed of a valve opening in the top of the valve body and a piston, so that drive force of a valve regulating assembly is reduced, opening and closing of the valve are facilitated; the large valve rod structure is designed into a multi-launder structure, so that the problem that fluid flows to the balance cavity from a high-pressure area can be effectively solved; the piston blocking ring and a cone valve pin are mounted in the middle of the large valve rod, so that the cone valve pin mounted on the piston blocking ring and a conical pin hole in the piston are matched to be in an opening state and a closing state, and therefore, the pressure storage effect and the pressure relief effect of the balance cavity are achieved. According to the high-pressure pipeline manual balance type valve, the valve body adopts a balance type structure, so that the acting force during valve opening and closing is reduced, and therefore, the high-pressure pipeline manual balance type valve has the advantages such as small opening-closing moment of force, reliable tightness, stable working performance, and the like, can be suitable for various operation environments, and is simple and convenient to operate.
Description
Technical field
The invention belongs to stop valve field, more specifically, relate to the manual balanced type valve of a kind of pressure duct.
Background technique
Valve, as control unit requisite in liquid control system, has and applies extremely widely in every profession and trade production development.In petroleum production, rock gas transport, waterpower management system, chemical industry manufacture, medicine production system; In the power industries such as water power, thermoelectricity and nuclear power; In the various haulage devices such as vehicle, boats and ships, aircraft, Valve controlling is all ubiquitous.Navigation especially in national defence high and new technology field, aviation and space flight all can use various Special valve.
In industrial automation liquid control system, stop valve is one of fluid control devices of being used widely, and it is used for switching on or off medium.The kind of stop valve is a lot, mainly contains straight-through stop valve, right-angle type stop valve and the oblique stop valve of direct current type.Valve of the present invention blocks class valve as one is extremely important, and it opens and closes valve is switch on or off medium by applying moment of torsion to valve rod.
Existing stop valve is when working pressure arrives more than 3.5MPa and latus rectum DN is greater than 100mm, pure manually opened valve is difficult especially, need the extra arm of force that increases to open smoothly, but these irregular operations will certainly cause certain damage to valve, greatly reduce the working life of valve.Therefore, develop a kind of high pressure big orifice manual balance type structure valve and there is urgent demand and using value.
Summary of the invention
For above defect or the Improvement requirement of prior art, the present invention proposes one and have employed balance type structure, the active force of valve opening and closedown can be reduced, there is advantages such as opening and closing moment is little, sealing reliable, stable work in work, multiple operating environments can be adapted to, the manual balanced type valve of pressure duct simple to operation.
The manual balanced type valve of pressure duct provided by the invention, is characterized in that, comprises valve body, valve gap, large valve rod, Gland, flap, piston, small valve core and handwheel, wherein:
Described body base offers snout cavity, and its sidepiece offers outlet plenum, and its top offers top valve port;
Described large valve rod comprises bottom disc shape valve disc, and be connected in the middle part of valve disc a round bar shape valve handle; Described valve handle from bottom with valve disc connecting place upwards to one section that matches with the top of piston, circumference offers some drainage troughs; Cylindrical notch is offered above drainage trough;
Described valve gap is fixed on the top valve port of valve body, for seal valve cavity; Described piston central circular through hole is by valve handle in the middle part of large valve rod, and piston base and flap top are connected; The valve disc of described large stem bottom enters in the top step hole of flap, and shoulder hole bottom part aperture diameter is greater than described valve disc external diameter, moves up and down in the cavity that valve disc can be formed in piston base and flap;
Described small valve core, comprises dumping-guiding plate, spring and small valve-rod, and dumping-guiding plate is arranged in the top step hole of flap, forms cavity with described shoulder hole and small valve-rod; The conduction hole of small valve-rod bottom flap, is connected with dumping-guiding plate screw thread; Spring keeps suitable tension force between being embedded in bottom dumping-guiding plate and flap; Small valve-rod external diameter is less than the conduction hole internal diameter bottom flap, small valve-rod has a bonnet, and its external diameter is greater than conduction hole internal diameter; Described dumping-guiding plate has drainage through hole;
During work, rotation hand wheel, large valve rod moves down, and overcomes the tension force of spring, is pressed down by the small valve-rod on small valve core, and the bonnet on small valve-rod moves down, and opens the conduction hole bottom flap; Continue rotation hand wheel, the piston be connected as a single entity, flap and small valve core move down; Flowing medium is from the conduction hole bottom flap, and the drainage through hole on dumping-guiding plate and the drainage trough on large valve rod are derived, and reduce ingress fluid medium pressure.
Further, the manual balanced type valve of described pressure duct, is characterized in that, also comprise counter balance pocket;
Described counter balance pocket comprises body top valve port, piston snap ring, cone valve pin and piston, wherein:
Described piston snap ring for circle center, is fixed on the cylindrical notch on large valve rod with large valve rod; Piston snap ring offers multiple through hole to justify Central Symmetry, and described upper piston area has the taper pin nail matched with described through hole, and cone valve pin is fixed in the through hole on piston snap ring, and plunger can pass in and out the taper pin nail of piston; Described piston head offers circular groove, and its diameter is greater than the external diameter of described piston snap ring, and piston snap ring within it can move up and down under the drive of large valve rod; The descending limit position of piston snap ring is that the taper pin nail of the conical surface and piston in the middle part of cone valve pin closely cooperates and locates, and upper limit by row is no more than bottom valve gap, and total kilometres are identical with the upper and lower stroke of valve disc;
When valve opened by needs, rotation hand wheel, large valve rod moves down, and the plunger being fixed on the cone valve pin on piston snap ring moves towards the pin hole on the piston coordinated downwards, until the conical surface in the middle part of cone valve pin closely covers the taper pin nail of piston, realize the pressure accumulation of counter balance pocket; When needs throttle down, rotation hand wheel, large valve rod moves up, and the plunger being fixed on the cone valve pin on piston snap ring moves up, until the conical surface in the middle part of cone valve pin departs from the taper pin nail of piston completely, achieves the pressure release of counter balance pocket.
Further, in the manual balanced type valve of described pressure duct, described valve gap top has circular groove, which is provided with Gland, the space between circular groove and Gland, is provided with stuffing box and makes it seal.
Further, in the manual balanced type valve of described pressure duct, described valve body, flap and valve gap adopt silicon brass material.
Further, in the manual balanced type valve of described pressure duct, large valve rod and piston adopt aluminum bronze material.
Further, in the manual balanced type valve of described pressure duct, Gland adopts manganese brass material.
Further, in the manual balanced type valve of described pressure duct, valve clack sealing surface and the valve body sealing surface composition conical surface seal firmly, and valve clack sealing surface and piston seal face composition metallic shim seal firmly, and body top sealing valve port face and valve bonnet seal face composition metallic shim seal firmly.
The present invention has following technical characterstic:
1, the counter balance pocket that the present invention utilizes body top valve port and piston to form carries out fluid pressure balance, reduces the driving force of valve regulated assembly, is conducive to the opening and closing of valve.
2, large stem structure is designed to many drainage troughs structure by the present invention, and rational deployment is in large stem lower portion circumference, effectively can solve fluid flows to counter balance pocket problem from zone of high pressure accordingly.
3, the present invention's notch in the middle part of large valve rod installs piston snap ring and cone valve pin, drive piston snap ring to move when valve rod moves up and down thereupon, make to be installed on the cone valve pin on piston snap ring and the taper hole on piston is in opening state and closed state, play the effect into counter balance pocket pressure accumulation and pressure release.
4, the present invention forms primarily of four parts at seal aspect: 1. the conical surface of valve clack sealing surface and valve body sealing surface composition seals firmly; 2. the metallic shim of valve clack sealing surface and piston seal face composition seals firmly; 3. the metallic shim of body top sealing valve port face and valve bonnet seal face composition seals firmly; 4. large valve rod and the packing box seal having relative movement position.
5, the present invention takes two-stage firmly to seal, and overcomes the problem existing when needing to seal simultaneously and leak; When Open valve, large valve rod backs down the piston, flap and the small valve core that are connected as a single entity downwards, and valve clack sealing surface and valve body sealing surface are departed from, and reach Open valve state, now valve plays connecting pipeline medium.When throttle down, large valve rod upwards pulls the piston, flap and the small valve core that are connected as a single entity, oppositely applies active force, make valve clack sealing surface and valve body sealing surface closely sealed, reach throttle down state, now valve plays a part to cut off pipeline medium.
In general, the above technological scheme that the present invention conceives, mainly possesses following technological merit:
1. valve regulated assembly of the present invention adopts two-stage hard sealing structure, the difficult problem sealed when effectively can improve valve opening and closing, and there is poorly sealed problem when avoiding sealing simultaneously.
2. the present invention is by the top valve port of valve body and piston decomposition pressure counter balance pocket, makes the upper and lower two cavity pressure approximate equilibriums of valve, reduces the driving force of valve opening and closing, be conducive to the energy-conservation of system.
3. the present invention is little to opening and closing moment needed for valve, adapts to multiple operating environments, simple to operation.
Accompanying drawing explanation
Fig. 1 is valve overall structure schematic diagram of the present invention;
Fig. 2 is valve regulated modular construction schematic diagram of the present invention;
Fig. 3 is valve flap of the present invention, large valve rod, piston, small valve-rod structural representation picture group;
Fig. 4 is valve buttoned-up status structural representation of the present invention;
Fig. 5 is valve small valve-rod opening state structural representation of the present invention;
Fig. 6 is the complete opening state structural representation of valve of the present invention;
In all of the figs, identical reference character is used for representing identical element or structure, wherein: (1) valve body, (2) small valve-rod, (2-1) bonnet, (3) flap, (3-1) flap shoulder hole, (3-2) flap conduction hole, (4) dumping-guiding plate, (5) large valve rod, (5-1) large valve rod valve disc, (5-2) large valve rod valve handle, (5-3) large valve rod drainage trough, (5-4) large valve rod notch, (6) packing ring, (7) screw, (8) piston, (8-1) piston hole, (8-2) piston taper pin hole, (9) cone valve pin, (10) piston snap ring, (11) nut, (12) bolt, (13) plain cushion, (14) bullet pad, (15) valve gap, (16) Gland, (17) handwheel, (18) nut, (19) pin, (20) bearing pin, (21) cotter pin, (22) stuffing box, (23) metallic shim, (24) spring.
Embodiment
In order to make object of the present invention, technological scheme and advantage clearly understand, below in conjunction with accompanying drawing 4,5 and accompanying drawing 6, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.In addition, if below in described each mode of execution of the present invention involved technical characteristics do not form conflict each other and just can mutually combine.
The manual balanced type valve of a kind of pressure duct of the present invention, the emphasis of its invention design has following 2 points: one is design valve body counter balance pocket structure, piston plays vital effect as the withstand voltage wall of equilibrium structure to balanced action, piston counter balance pocket and valve design is integrally conducive to processing, reducing costs for same; Two is design valve regulated assembly, can effectively solve valve seal integrity problem, realize the opening and closing of valve smoothly.
Valve of the present invention concrete assembling work process is as follows:
1, valve regulated assembled (comprising flap 3, small valve-rod 2, spring 24, dumping-guiding plate 4, large valve rod 5, piston 8, piston snap ring 10 and cone valve pin 9 etc.)
Between the shoulder hole 3-1 first spring 24 being placed in dumping-guiding plate 4 and flap 3, then small valve-rod 2 is connected through the conduction hole 3-2 of flap 3 and dumping-guiding plate 4; Piston snap ring 10 is fixed in the cylindrical notch 5-4 on large valve rod 5, again cone valve pin 9 is installed on piston snap ring 10, and coordinate with the taper pin nail 8-2 on piston 8, large valve rod 5 is through piston hole 8-1, is then fixed on flap 3 top together simultaneously.
2, valve body general assembly (comprising valve regulated assembly, valve body 1, valve gap 15, Gland 16, handwheel 17 etc.)
First valve body 1 is fixed, then valve regulated assembly is passed from valve port bottom valve body 1 successively, then valve gap 15 is connected in valve body 1 top, with top sealing valve port through large valve rod 5; Secondly, stuffing box 22 is loaded stuffing box cavity, is sealed by Gland 16; Finally, handwheel 17 is installed on large valve rod 5 top, namely completes valve body general assembly.
Valve of the present invention concrete open and close working procedure is as follows:
1. valve opening process
1) state before valve opening: valve is in closed condition.Cone valve pin 9 is separated with the taper pin nail 8-2 sealing surface of piston 8, and the taper pin nail 8-2 of piston 8 is in opening state.Flap 3 bottom is high-pressure fluid medium, and flap 3 sealing surface and valve body 1 closely cooperate, the small valve-rod 2 of flap 3 sealed bottom face and small valve core closely cooperates.Now, valve is in buttoned-up status.
2) opening process: rotate handwheel 17 and provide power for large valve rod 5, large valve rod 5 first overcomes the pressure of external fluid medium, through hole 8-1 along piston 8 moves downward, and now driving force only needs to overcome the pressure that the small valve-rod 2 lower end bonnet 2-1 cross-section area of flowing medium to small valve core produces.This motion makes the small valve-rod 2 lower end sealing surface of small valve core and flap 3 sealed bottom face open, and flowing medium is successively along the dumping-guiding plate 4 of small valve core, and the drainage trough 5-3 of large valve rod 5 enters the counter balance pocket of piston 8.Moving down of large valve rod 5 drives the cone valve pin 9 on the piston snap ring 10 that connects firmly to move down, and packed-piston taper pin nail 8-2, prevents the external high pressure fluid medium pressure release being incorporated into counter balance pocket.In opening process, flowing medium acts on piston 8 upper surface, produces downward power, balances the active force upwards that most of external high pressure fluid medium produces flap 3.Large valve rod 5 moves downward continuously, promotes piston 8, flap 3 and small valve core downward, until valve is opened completely.As shown in Figure 5,6.
2. close valve process
1) state before valve is closed: valve is in opening state.Flap 3 lower flow pressure medium is a little more than upper flow pressure medium.Small valve-rod 2 lower end bonnet 2-1 sealing surface and the flap 3 sealed bottom face of small valve core are in opening state, and cone valve pin 9 and piston taper pin hole 8-2 are in closed condition, now, are similar to identical in counter balance pocket with external fluid medium pressure.
2) closing process: rotate handwheel 17 and provide power for large valve rod 5, large valve rod 5 drives the flap 3 that is connected as a single entity and piston 8 to move upward, now, the small valve-rod 2 lower end bonnet 2-1 sealing surface of small valve core and flap 3 sealed bottom face may be in unlatching or closed condition, therefore, the flowing medium in counter balance pocket or flowed out by the drainage trough 5-3 of large valve rod 5 or flowed out by piston taper pin hole 8-2.To contact after sealing with valve body 1 sealing surface until flap 3 sealing surface, large valve rod 5 continues to move upward until the small valve-rod 2 lower end bonnet 2-1 sealing surface of small valve core and flap 3 sealed bottom face seal completely.Now, cone valve pin 9 is separated with piston taper pin hole 8-2 sealing surface, and piston taper pin hole 8-2 is in opening state.Now, counter balance pocket communicates with low pressure area pipeline, low-pressure fluid medium is made to act on piston 8 outer surface, and extraneous high-pressure fluid medium acts on flap 3 lower surface, both produce upwards larger effect and make a concerted effort, thus promote flap 3 and small valve-rod 2, make the sealing surface at two places obtain better sealing effect.As shown in Figure 4.
The manual balanced type valve of pressure duct in the present embodiment, mainly comprises valve body 1, valve gap 15, large valve rod 5, Gland 16, flap 3, piston 8, small valve core and handwheel 17.The counter balance pocket utilizing valve body 1 top valve port and piston 8 to form carries out fluid pressure balance, reduces the driving force of valve regulated assembly, is conducive to the opening and closing of valve; The structure of large valve rod 5 is designed to many drainage troughs 5-3 structure, and rational deployment is in large valve rod 5 lower circumference, effectively can solves fluid flows to counter balance pocket problem from zone of high pressure; Piston snap ring 10 and cone valve pin 9 are installed in the middle part of large valve rod 5, make the cone valve pin 9 be installed on piston snap ring 10 be in opening state and closed state with the taper pin nail 8-2 on piston 8, the effect into counter balance pocket pressure accumulation and pressure release can be played.Valve body of the present invention have employed balance type structure, reduces the active force of valve opening and closedown, has advantages such as opening and closing moment is little, sealing reliable, stable work in work, can adapt to multiple operating environments, simple to operation.
Select as one, described valve body 1, flap 3 and valve gap 15 can adopt silicon brass material.Large valve rod 5 and piston 8 adopt aluminum bronze material.Gland 16 adopts manganese brass material.
Select as one, described flap 3 sealing surface and the valve body 1 sealing surface composition conical surface seal firmly.Flap 3 sealing surface and piston 8 sealing surface composition metallic shim seal firmly.Valve body 1 top valve port sealing surface and valve gap 15 sealing surface composition metallic shim seal firmly.Take two-stage firmly to seal, the problem existing when needing to seal simultaneously and leak can be overcome.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the manual balanced type valve of pressure duct, it is characterized in that, it comprises valve body (1), valve gap (15), large valve rod (5), Gland (16), flap (3), piston (8), small valve core and handwheel (17), wherein:
Described valve body (1) bottom offers snout cavity, and its sidepiece offers outlet plenum, and its top offers top valve port;
Described large valve rod (5) comprises bottom disc shape valve disc (5-1), and be connected in the middle part of valve disc (5-1) a round bar shape valve handle (5-2); Described valve handle (5-2) is from bottom and valve disc (5-1) connecting place upwards to one section that matches with the top of piston (8), and circumference offers some drainage troughs (5-3); Drainage trough (5-3) top offers cylindrical notch (5-4);
Described valve gap (15) is fixed on the top valve port of valve body (1), for seal valve cavity; Described piston (8) central circular through hole (8-1) is by large valve rod (5) middle part valve handle (5-2), and piston (8) bottom is connected with flap (3) top; The valve disc (5-1) of described large valve rod (5) bottom enters in the top step hole (3-1) of flap (3), shoulder hole (3-1) bottom part aperture diameter is greater than described valve disc (5-1) external diameter, moves up and down in the cavity that valve disc (5-1) can be formed in piston (8) bottom and flap (3);
Described small valve core, comprise dumping-guiding plate (4), spring (24) and small valve-rod (2), dumping-guiding plate (4) is arranged in the top step hole (3-1) of flap (3), forms cavity with shoulder hole (3-1) and small valve-rod (2); Small valve-rod (2), through the conduction hole (3-2) of flap (3) bottom, is connected with dumping-guiding plate (4) screw thread; Spring (24) is embedded between dumping-guiding plate (4) and flap (3) bottom, keeps suitable tension force; Small valve-rod (2) external diameter is less than conduction hole (3-2) internal diameter, small valve-rod (2) has a bonnet (2-1), and its external diameter is greater than conduction hole (3-3) internal diameter; Described dumping-guiding plate (4) has drainage through hole;
During work, rotation hand wheel (17), large valve rod (5) moves down, overcome the tension force of spring (24), small valve-rod (2) on small valve core is pressed down, bonnet (2-1) on small valve-rod (2) moves down, and opens the conduction hole (3-2) of flap (3) bottom; Continue rotation hand wheel (17), the piston be connected as a single entity (8), flap (3) and small valve core move down; Flowing medium is from the conduction hole (3-2) of flap (3) bottom, drainage trough (5-3) on drainage through hole on dumping-guiding plate (4) and large valve rod (5) is derived, to reduce the fluid medium pressure of ingress.
2. the manual balanced type valve of a kind of pressure duct as claimed in claim 1, is characterized in that, also comprise counter balance pocket;
Described counter balance pocket comprises valve body (1) top valve port, piston snap ring (10), cone valve pin (9) and described piston (8), wherein:
Described piston snap ring (10) for circle center, is fixed on the cylindrical notch (5-4) on large valve rod (5) with large valve rod (5); Piston snap ring (10) offers multiple through hole to justify Central Symmetry, described piston (8) is provided with the taper pin nail (8-2) matched with described through hole, cone valve pin (9) is fixed in the through hole on piston snap ring (10), and plunger can pass in and out the taper pin nail (8-2) of piston (8); Described piston (8) top offers circular groove, its diameter is greater than the external diameter of described piston snap ring (10), with valve port Compositional balance chamber, valve body (1) top, piston snap ring (10) within it can move up and down under the drive of large valve rod (5); Piston snap ring (10) descending limit position is that cone valve pin (9) the middle part conical surface and the taper pin nail (8-2) of piston (8) closely cooperate and locate, upper limit by row is no more than valve gap (15) bottom, and stroke is identical up and down for total kilometres and valve disc (5-1);
When valve opened by needs, rotation hand wheel (17), large valve rod (5) moves down, the plunger being fixed on the cone valve pin (9) on piston snap ring (10) is mobile towards the taper pin nail (8-2) on the piston (8) coordinated downwards, until the conical surface at cone valve pin (9) middle part closely covers the taper pin nail (8-2) of piston (8), realize the pressure accumulation of counter balance pocket; When needs throttle down, rotation hand wheel (17), large valve rod (5) moves up, the plunger being fixed on the cone valve pin (9) on piston snap ring (10) moves up, until the conical surface at cone valve pin (9) middle part departs from the taper pin nail (8-2) of piston (8) completely, achieve the pressure release of counter balance pocket.
3. the manual balanced type valve of a kind of pressure duct as claimed in claim 1 or 2, it is characterized in that, described valve gap (15) top has circular groove, which is provided with Gland (16), space between circular groove and Gland (16), is provided with stuffing box (22) and makes it seal.
4. the manual balanced type valve of a kind of pressure duct as claimed in claim 1 or 2, is characterized in that, described valve body (1), flap (3) and valve gap (15) adopt silicon brass material.
5. the manual balanced type valve of a kind of pressure duct as claimed in claim 1 or 2, is characterized in that, large valve rod (5) and piston (8) adopt aluminum bronze material.
6. the manual balanced type valve of a kind of pressure duct as claimed in claim 1 or 2, is characterized in that, Gland (16) adopts manganese brass material.
7. the manual balanced type valve of a kind of pressure duct as claimed in claim 1 or 2, is characterized in that, flap (3) sealing surface and valve body (1) the sealing surface composition conical surface seal firmly.
8. the manual balanced type valve of a kind of pressure duct as claimed in claim 1 or 2, is characterized in that, flap (3) sealing surface and piston (8) sealing surface composition metallic shim seal firmly.
9. the manual balanced type valve of a kind of pressure duct as claimed in claim 1 or 2, is characterized in that, valve body (1) top valve port sealing surface and valve gap (15) sealing surface composition metallic shim seal firmly.
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| CN201510992808.7A CN105508627B (en) | 2015-12-24 | 2015-12-24 | A kind of manual balanced type valve of pressure duct |
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| CN201510992808.7A CN105508627B (en) | 2015-12-24 | 2015-12-24 | A kind of manual balanced type valve of pressure duct |
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| CN105508627B CN105508627B (en) | 2017-11-14 |
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| CN103899764A (en) * | 2014-03-19 | 2014-07-02 | 哈尔滨工程大学 | External pilot balance type kingston valve |
| CN103912687A (en) * | 2014-03-12 | 2014-07-09 | 哈尔滨工程大学 | Large submergence depth leak prevention double seal pilot-operated type sea suction valve |
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| CN113339578A (en) * | 2021-07-01 | 2021-09-03 | 蓝晶晶 | Pilot balance type stop valve |
| CN113803472A (en) * | 2021-08-19 | 2021-12-17 | 九江中船消防设备有限公司 | High-strength and high-toughness copper alloy sea valve and valve body detection method |
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