CN203348561U - Rapid opening and closing valve - Google Patents
Rapid opening and closing valve Download PDFInfo
- Publication number
- CN203348561U CN203348561U CN 201320288549 CN201320288549U CN203348561U CN 203348561 U CN203348561 U CN 203348561U CN 201320288549 CN201320288549 CN 201320288549 CN 201320288549 U CN201320288549 U CN 201320288549U CN 203348561 U CN203348561 U CN 203348561U
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- valve
- equalizing
- flap
- main valve
- guide sleeve
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Abstract
The utility model relates to a rapid opening and closing valve which comprises a valve body, a valve cover, a valve rod, a main valve sealing pair and a pre-opening valve sealing pair. The main valve sealing pair is composed of a main valve seat and a main valve clack. The main valve seat is installed in the valve body, and the main valve clack is located above the main valve seat and matched with the main valve seat. The pre-opening valve sealing pair is composed of a pre-opening valve seat and a pre-opening valve clack, wherein the pre-opening valve seat is arranged horizontally, and the pre-opening valve clack is located above the pre-opening valve seat. A pre-opening through hole is formed in the center of the cup bottom of the main valve clack, the pre-opening valve seat is installed at the upper end of the pre-opening through hole, the pre-opening valve clack is installed at the lower end of the valve rod, and the lower portion of the valve rod is further connected with a Belleville spring and a pressing sleeve of the Belleville spring. The rapid opening and closing valve can be opened or closed rapidly under the burdensome high-temperature and high-pressure working conditions, closing is tight, operation is reliable, and the rapid opening and closing valve can be mainly used for occasions used for closing and separating in a process system of a power plant and any other suitable occasions.
Description
Technical field
The utility model relates to a kind of quick-acting valve, is mainly used in the occasion of in the power plant process system, being turn-offed, isolating, and particularly under the heavy operating mode of high temperature, high pressure, opens and closes rapidly.
Background technique
The application of valve in the power plant process system is very extensive, and all process systems all need ad hoc valve, and the realization of process system function ensures by various valves.If valve is of low quality, affect the safety of power plant's operation.Comprehensively, the quality of valve directly affects Security and the Economy of power plant's operation.
In the process system of power plant, some valve arranges in order to guarantee security of operation, as the check valve on extraction line and electronic separating valve, the minimum discharge recycle valve of the safety valve in system, the electronic separating valve of boiler feed water pump discharge, check valve, high low pressure heater import and export shut-off valve, by-pass valve, drain valve, feed water pump and condensate pump and pressure regulator valve etc.Because above-mentioned valve directly affects the safety that power plant moves, must select reliable in quality, the valve of function admirable; The valve played regulatory role, must have good adjusting function, guarantees to regulate parameter and accurately put in place, otherwise can cause device damage and accident to occur; For high-temperature high pressure valve, must guarantee without exposing, otherwise, will jeopardize personal safety.
Valve is along with the development of power construction, the increase of unit capacity, and medium parameter improves, and corresponding manufacturing process is increasingly sophisticated, and automatization level improves constantly, also more and more high to power station valve performance and quality requirement.At present, domestic main power station main and auxiliaries manufacturing camera Introduced From Abroad advanced person's designing technique and manufacturing process, to adapt to the needs of large-scale power station unit development.Up to the present, the main and auxiliary machine equipment of large-scale power station has been realized production domesticization substantially, but the valve manufacturing is not caught up with the development of power industry, and the high-end valve of large-scale power station unit is almost without the achievement of domestic valve so far.
The model utility content
For overcoming the above-mentioned defect of prior art, the utility model provides a kind of quick-acting valve, this valve can open and close rapidly under the heavy operating mode of high temperature, high pressure, and turn-off tight, operation is reliable, mainly can be used in the power plant process system rising shutoff, the occasion of isolation and the occasion of other any suitable.
The technical solution of the utility model is:
A kind of quick-acting valve, comprise valve body, valve gap, valve rod and main valve sealing pair, also comprise the equalizing valve sealing pair, described valve gap is arranged on described valve body, described valve body is provided with import and outlet, the valve pocket of described valve body forms the medium channel that connects described import and described outlet, described main valve sealing pair is arranged on main valve valve seat in described valve body by level and is positioned at described main valve valve seat top and forms with the supporting main valve flap of described main valve valve seat, described main valve flap is cup-shaped, be provided with sealing surface at the bottom of its glass, be installed with the first guide sleeve in described valve body, the sidewall of described the first guide sleeve is provided with for being communicated with the through hole of both sides valve pocket inside and outside it, described main valve flap moves and coordinates with the inner wall sealing of described the first guide sleeve, described valve rod reaches in described valve body from described valve gap extension through the valve rod hole on described valve gap, described equalizing valve sealing pair consists of horizontally disposed equalizing valve valve seat and the equalizing valve flap that is positioned at described equalizing valve valve seat top, the cup end central authorities of described main valve flap are provided with pre-unblank hole, described equalizing valve valve seat is arranged on the upper end in described pre-unblank hole, described equalizing valve flap is cup-shaped, be arranged on the lower end of described valve rod, be provided with the second guide sleeve be tightly connected with described main valve flap in described main valve flap, described the second guide sleeve is provided with for being communicated with the through hole of its upper and lower both sides valve pocket, the inwall of described the second guide sleeve is provided with radially inwardly protruded limited ring dais, described equalizing valve flap is positioned at the following of described limited ring dais and moves and coordinate with the inner wall sealing of described the second guide sleeve, described stem lower portion also is socketed with the gland of belleville spring and belleville spring, described valve rod is provided with the spacing shoulder for stopping that described belleville spring gland moves up, described gland be positioned at described spacing shoulder below, described belleville spring is arranged between described gland and described limited ring dais.
The beneficial effects of the utility model are:
Do fast opening and closing use on vapour, waterpipe that this product can be above for DN100, and other its main feature of valve of the same trade or business:
(1) main valve, equalizing valve adopt plane sealing, and higher grade of sealing;
(2) the valve internals adopt the design of equalizing valve, and actuator is little;
(3) the internals machining accuracy is high;
(4) valve body can adopt forging process, and quality of processing is high, and in the valve more than DN100 under prior art, most employing castings are processed, and defect is more, the poor quality;
(5) york piece adopts guide pillar structure, simple, easy accessibility; The valve gap structure compared of casting is simple, and machining accuracy is high; And can obtain the stroke indication.
The disclosed quick-acting valve valve of the utility model can be applicable to steam turbine high add that the various needs such as normal hydrophobic isolating door, feed water preheater shutoff, boiler drain valve, economizer drain valve, boiler feed water recirculation bypass isolation valves, boiler feed water shut-off valve turn-off fast and the isolating pipelines system in.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the partial enlarged drawing that relates to main valve sealing pair and equalizing valve sealing pair part in Fig. 1;
Fig. 3 is the structural representation that the utility model relates to rotation-preventing mechanism.
Embodiment
Referring to Fig. 1-3, the utility model provides a kind of quick-acting valve, it comprises valve body 29, valve gap, valve rod 8 and main valve sealing pair, also comprise the equalizing valve sealing pair, described valve gap is arranged on described valve body, described valve body is provided with import and outlet, the valve pocket of described valve body forms the medium channel that connects described import and described outlet, described main valve sealing pair is arranged on main valve valve seat in described valve body 1 by level and is positioned at described main valve valve seat top and forms with the supporting main valve flap 28 of described main valve valve seat, described main valve flap is cup-shaped, be provided with sealing surface at the bottom of its glass, be installed with the first guide sleeve 27 in described valve body, the sidewall of described the first guide sleeve is provided with for being communicated with the through hole of both sides valve pocket inside and outside it, described main valve flap moves and coordinates with the inner wall sealing of described the first guide sleeve, described valve rod reaches in described valve body from described valve gap extension through the valve rod hole on described valve gap, described equalizing valve sealing pair consists of horizontally disposed equalizing valve valve seat and the equalizing valve flap 3 that is positioned at described equalizing valve valve seat top, the cup end central authorities of described main valve flap are provided with pre-unblank hole, described equalizing valve valve seat is arranged on the upper end in described pre-unblank hole, described equalizing valve flap is cup-shaped, be arranged on the lower end of described valve rod, be provided with the second guide sleeve 4 be tightly connected with described main valve flap in described main valve flap, described the second guide sleeve is provided with for being communicated with the through hole of its upper and lower both sides valve pocket, the inwall of described the second guide sleeve is provided with radially inwardly protruded limited ring dais, described equalizing valve flap is positioned at the following of described limited ring dais and moves and coordinate with the inner wall sealing of described the second guide sleeve, described stem lower portion also is socketed with the gland 7 of belleville spring 5 and belleville spring, described valve rod is provided with the spacing shoulder for stopping that described belleville spring gland moves up, described gland be positioned at described spacing shoulder below, described belleville spring is arranged between described gland and described limited ring dais.In order to improve the connection performance between described main valve flap and described the second guide sleeve, can also position by corresponding Cock screw 6.
Preferably, described main valve sealing pair and equalizing valve sealing pair are the plane sealing pair.
Preferably, each sealing surface of described main valve sealing pair and equalizing valve sealing pair is the sealing surface formed through grinding after the built-up welding cobalt base hard alloy.
Preferably, the quantity of described belleville spring is a plurality of and forms the belleville spring group in involutory mode.
Preferably, described equalizing valve flap at the mounting type of described valve rod lower end is: described equalizing valve flap is socketed in the lower end of described valve rod and is fixed on described valve rod by corresponding Cock screw 2.
Preferably, described gland is fixedly connected with described valve rod by connecting pin 26, and the inboard of described the second guide sleeve is provided with axial keyway, and described gland is provided with the keyway in described the second guide sleeve and moves the slide key 25 coordinated.
Preferably, described valve body and described valve gap are provided with the adpting flange of mutual correspondence and can be provided with nut 23 or adopt other bolton forms by bolt 24() tighten together, described valve body and described the valve gap inboard of corresponding adpting flange mutually are provided with mutually to synthesizing the annular notches of a circular groove, the top of described the first guide sleeve is provided with the annular shoulder of radially outward projection, described annular shoulder inserts described circular groove, is respectively equipped with the spirotallic gasket 9 for sealing between its upper and lower end face and corresponding described annular notches.
Preferably, be provided with the filler chamber for valve stem seal above the valve rod hole of described valve gap, in described filler chamber, adopting is that kernmantle, centre are the combined packing 22 of graphite annulus up and down, the top of described filler chamber can be provided with nut 12 or adopt other bolton forms by bolt 21() be installed with Gland 11, the following of described combined packing can arrange corresponding seat ring 10 again to improve sealing characteristics.
Preferably, for driving the actuator 16 of described valve rod to be arranged on described valve gap by york piece, described york piece mainly consists of circumferential 4 guide pillars 19, the lower end of described each guide pillar is screwed on the corresponding guide pillar installation screw on described valve gap, the upper end of described each guide pillar is fastened on by screw 17 on the mounting flange 15 of described actuator, and the upper end of described valve rod connects the output terminal of described actuator.The upper end of described valve rod can adopt the technology of any suitable with the Placement of the output terminal of described actuator, for example, described valve rod upper end connection valve stem nut 18, described Stem Mut is arranged on the output terminal of described actuator and is connected with the output shaft of this output terminal by thrust-bearing 14.
Preferably, the middle part of described york piece is equipped with rotation-preventing mechanism, described rotation-preventing mechanism comprises two mutual involutory fixture blocks 30, the two ends of described two fixture blocks and central authorities be respectively equipped with mutual correspondence for through guide pillar and for clamping the groove of valve rod, described two fixture blocks tighten together by corresponding screw 13, the drop-center of described two fixture blocks mutually is combined described valve rod closely is clamped in wherein, the two ends groove of described two fixture blocks mutually is combined with corresponding two guide pillars and moves and coordinate, be fixed with the stroke pointer on described Gland, be fixed with the stroke direction board on described guide pillar.
Working principle of the present utility model is:
MEDIA FLOW is to being refluence (as shown in Fig. 1 arrow), and the pressure that medium produces helps valve seal, and maximum driving force appears at the moment of valve opening.
In the situation that valve closing, there is pressure reduction in valve front and back (between import and export), owing to being designed with opening (for being communicated with the through hole of both sides valve pocket inside and outside it) on the first guide sleeve, the main valve flap exists and pressure reduction identical before and after valve up and down, by the final controlling element thrust of actuator, downward active force and valve rod radial force, sealing force, the dish spring thrust that medium produces, keeps balance.
In the moment of valve opening, lifting force made progress of the generation of final controlling element, because the thrust of the direction of power and dish spring, radial force that valve rod produces are consistent, overcome the gravity of frictional force, main valve flap and assembly thereof of the downward active force of medium, valve packing under common effect its three after, valve rod drives the equalizing valve flap and moves upward.The equalizing valve flap can be opened rapidly under the effect of the power such as dish spring thrust, and the equalizing valve flap arrives the position of total travel; After the equalizing valve sealing pair is opened, the high-pressure medium of main valve flap top is by the arm UNICOM of equalizing orifice (for being communicated with the through hole of its upper and lower both sides valve pocket), equalizing valve valve seat orifice and the valve outlet of the second guide sleeve, eliminated the upper and lower pressure reduction of existence and main valve flap, final controlling element only need overcome the gravity of main valve flap and assembly thereof again can Open valve, obviously, the needed power of the opening process bigbore valve like this of comparing is very little, by the final controlling element of a less, is got final product.
After valve wide open, the control of the position limit switch by electric actuator (or pneumatic actuator), realize the spacing of valve, can be furnished with stroke on Gland and hold pin, also be fixed with the stroke direction board on the guide pillar of york piece, can clear view to the position (valve opening) at valve place.
In the situation that valve need to be closed, final controlling element band ovable valve stem and flap assembly move down, when reaching the main valve valve seat, the main valve flap contacts with the main valve valve seat, valve rod continues to move downward, overcome the thrust of dish spring at the gland be connected with valve rod after, the equalizing valve sealing pair contacts, and valve rod continues to move down, until produce enough sealing force late gates at the sealing surface of main valve sealing surface, equalizing valve, closes fully.
In the opening and closing process of valve, at the rotation-preventing mechanism effect lower valve rod of valve, in the valve opening and closing process, only can do the straight line elevating movement; The flat key (slide key) that gland is connected with the second guide sleeve guarantees that the rotation of circumferencial direction does not occur the sealing surface of main valve clack sealing surface, equalizing valve in contact process, has guaranteed the stable, reliable of sealing;
Select the valve of electric actuator, in the york piece top design, bearing chamber is arranged, Stem Mut and bearing are arranged in bearing chamber, and the connecting end of final controlling element drives with valve rod and rotates, valve rod screw thread, below the axially mobile keying that carrys out control valve under the effect of valve anti-rotation device.
Select pneumatic actuator, do not need the parts such as bearing chamber, final controlling element can directly be connected to realize the control to valve by flange with valve rod.
Do fast opening and closing use on vapour, waterpipe that this product can be above for DN100, and other its main feature of valve of the same trade or business:
(1) higher grade of sealing; Main valve, equalizing valve adopt plane sealing;
(2) the valve internals adopt the design of equalizing valve, and actuator is little;
(3) the internals machining accuracy is high;
(4) valve body adopts forging process, and quality of processing is high; In valve more than existing DN100, most employing castings are processed, and defect is more, the poor quality;
(5) york piece adopts guide pillar structure, simple, easy accessibility; The valve gap structure compared of casting is simple, and machining accuracy is high;
(6) carry out the selection of material and determining of size according to the parameter of valve.
Claims (10)
1. a quick-acting valve, comprise valve body, valve gap, valve rod and main valve sealing pair, described valve gap is arranged on described valve body, described valve body is provided with import and outlet, the valve pocket of described valve body forms the medium channel that connects described import and described outlet, described main valve sealing pair is arranged on main valve valve seat in described valve body by level and is positioned at described main valve valve seat top and forms with the supporting main valve flap of described main valve valve seat, described main valve flap is cup-shaped, be provided with sealing surface at the bottom of its glass, be installed with the first guide sleeve in described valve body, the sidewall of described the first guide sleeve is provided with for being communicated with the through hole of both sides valve pocket inside and outside it, described main valve flap moves and coordinates with the inner wall sealing of described the first guide sleeve, described valve rod reaches in described valve body from described valve gap extension through the valve rod hole on described valve gap, characterized by further comprising the equalizing valve sealing pair, described equalizing valve sealing pair consists of horizontally disposed equalizing valve valve seat and the equalizing valve flap that is positioned at described equalizing valve valve seat top, the cup end central authorities of described main valve flap are provided with pre-unblank hole, described equalizing valve valve seat is arranged on the upper end in described pre-unblank hole, described equalizing valve flap is cup-shaped, be arranged on the lower end of described valve rod, be provided with the second guide sleeve be tightly connected with described main valve flap in described main valve flap, described the second guide sleeve is provided with for being communicated with the through hole of its upper and lower both sides valve pocket, the inwall of described the second guide sleeve is provided with radially inwardly protruded limited ring dais, described equalizing valve flap is positioned at the following of described limited ring dais and moves and coordinate with the inner wall sealing of described the second guide sleeve, described stem lower portion also is socketed with the gland of belleville spring and belleville spring, described valve rod is provided with the spacing shoulder for stopping that described belleville spring gland moves up, described gland be positioned at described spacing shoulder below, described belleville spring is arranged between described gland and described limited ring dais.
2. quick-acting valve as claimed in claim 1, is characterized in that described main valve sealing pair and equalizing valve sealing pair are the plane sealing pair.
3. quick-acting valve as claimed in claim 2, is characterized in that each sealing surface of described main valve sealing pair and equalizing valve sealing pair is the sealing surface formed through grinding after the built-up welding cobalt base hard alloy.
4. as claim 1,2 or 3 described quick-acting valves, the quantity that it is characterized in that described belleville spring is a plurality of and forms the belleville spring group in involutory mode.
5. quick-acting valve as claimed in claim 4, it is characterized in that described equalizing valve flap at the mounting type of described valve rod lower end is: described equalizing valve flap is socketed in the lower end of described valve rod and is fixed on described valve rod by corresponding Cock screw.
6. quick-acting valve as claimed in claim 5, it is characterized in that described gland is fixedly connected with described valve rod by connecting pin, the inboard of described the second guide sleeve is provided with axial keyway, and described gland is provided with the keyway in described the second guide sleeve and moves the slide key coordinated.
7. quick-acting valve as claimed in claim 6, it is characterized in that described valve body and described valve gap are provided with the adpting flange of mutual correspondence and pass through together with bolton, described valve body and described the valve gap inboard of corresponding adpting flange mutually are provided with mutually to synthesizing the annular notches of a circular groove, the top of described the first guide sleeve is provided with the annular shoulder of radially outward projection, described annular shoulder inserts described circular groove, is respectively equipped with the spirotallic gasket for sealing between its upper and lower end face and corresponding described annular notches.
8. quick-acting valve as claimed in claim 7, it is characterized in that being provided with the filler chamber for valve stem seal above the valve rod hole of described valve gap, in described filler chamber, adopting is that kernmantle, centre are the combined packing of graphite annulus up and down, is bolted above described filler chamber Gland is installed.
9. quick-acting valve as claimed in claim 8, it is characterized in that the actuator for driving described valve rod is arranged on described valve gap by york piece, described york piece mainly consists of circumferential 4 guide pillars, the lower end of described each guide pillar is screwed on the corresponding guide pillar installation screw on described valve gap, the upper end of described each guide pillar is by screw fastening on the mounting flange of described actuator, and the upper end of described valve rod connects the output terminal of described actuator.
10. quick-acting valve as claimed in claim 9, the middle part that it is characterized in that described york piece is equipped with rotation-preventing mechanism, described rotation-preventing mechanism comprises two mutual involutory fixture blocks, the two ends of described two fixture blocks and central authorities be respectively equipped with mutual correspondence for through guide pillar and for clamping the groove of valve rod, described two fixture blocks by corresponding screw fastening together, the drop-center of described two fixture blocks mutually is combined described valve rod closely is clamped in wherein, the two ends groove of described two fixture blocks mutually is combined with corresponding two guide pillars and moves and coordinate, be fixed with the stroke pointer on described Gland, be fixed with the stroke direction board on described guide pillar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320288549 CN203348561U (en) | 2013-05-24 | 2013-05-24 | Rapid opening and closing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320288549 CN203348561U (en) | 2013-05-24 | 2013-05-24 | Rapid opening and closing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203348561U true CN203348561U (en) | 2013-12-18 |
Family
ID=49748464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320288549 Expired - Lifetime CN203348561U (en) | 2013-05-24 | 2013-05-24 | Rapid opening and closing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203348561U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939624A (en) * | 2014-05-09 | 2014-07-23 | 杭州华惠阀门有限公司 | Reducing valve |
| CN104896109A (en) * | 2015-05-29 | 2015-09-09 | 杭州华惠阀门有限公司 | Pressure reducing valve |
| CN105299285A (en) * | 2015-11-11 | 2016-02-03 | 上海东宝阀门制造有限公司 | Three-eccentric bidirectional all-metal hard-seal butterfly valve |
| CN113028112A (en) * | 2021-02-03 | 2021-06-25 | 德莱赛机械(苏州)有限公司 | Regulating valve |
-
2013
- 2013-05-24 CN CN 201320288549 patent/CN203348561U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939624A (en) * | 2014-05-09 | 2014-07-23 | 杭州华惠阀门有限公司 | Reducing valve |
| CN104896109A (en) * | 2015-05-29 | 2015-09-09 | 杭州华惠阀门有限公司 | Pressure reducing valve |
| CN105299285A (en) * | 2015-11-11 | 2016-02-03 | 上海东宝阀门制造有限公司 | Three-eccentric bidirectional all-metal hard-seal butterfly valve |
| CN113028112A (en) * | 2021-02-03 | 2021-06-25 | 德莱赛机械(苏州)有限公司 | Regulating valve |
| CN113028112B (en) * | 2021-02-03 | 2023-08-25 | 德莱赛机械(苏州)有限公司 | Regulating valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131218 |