CN204532688U - Large discharge plug-in type ring cavity control type emergency distributing valve - Google Patents
Large discharge plug-in type ring cavity control type emergency distributing valve Download PDFInfo
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- CN204532688U CN204532688U CN201520252759.9U CN201520252759U CN204532688U CN 204532688 U CN204532688 U CN 204532688U CN 201520252759 U CN201520252759 U CN 201520252759U CN 204532688 U CN204532688 U CN 204532688U
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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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Abstract
The utility model is a kind of large discharge plug-in type ring cavity control type emergency distributing valve, be characterised in that described emergency distributing valve is made up of an emergency distributing valve A block and the split of an emergency distributing valve B block, two cartridge valves are respectively provided with respectively in the valve body of emergency distributing valve A block and emergency distributing valve B block, the spool upper end of described cartridge valve and valve seat mouth adopt conical surface form to form to seal to be paid, this structure solves the oil rub resistance poor performance of conventional spool valves structure, processing request is harsh and can not seal the drawbacks such as brought zero drift completely, advantage large for cartridge valve flow area is incorporated in emergency distributing valve simultaneously, the difficulty faced when improving the design of emergency distributing valve large discharge to a certain extent, contribute to the R & D design of large discharge emergency distributing valve.
Description
Technical field
The utility model relates to emergency distributing valve, especially a kind of for the large discharge plug-in type ring cavity control type emergency distributing valve in Turbine Governor System.
Background technique
In traditional domestic and international Turbine Governor System, emergency distributing valve adopts sliding valve structure mostly, is generally made up of valve body, sliding valve style spool and control mechanism.With regard to whole Turbine Governor System, emergency distributing valve has incomparable central role, it is the last line of defense that speed control system and whole power plant safety ensure, so the optimization of its structure, the reliable and stable of work are the requirements to emergency distributing valve most critical, core.In practice, adopt the emergency distributing valve of sliding valve structure to there is certain defect, one be himself to being processed with comparatively harsh requirement, difficulty of processing is large; Two is descend sliding valve structure resistance to oily stain can be poor in working order; Three is that sliding valve structure jam phenomenon easily occurs and loses normal service behaviour for emergency distributing valve step working state.In addition, the working mechanism of sliding valve structure itself inevitably produces oil leakage phenomenon, and this makes the speed regulator in Turbine Governor System very easily zero drift occur.
Drawback existing for above-mentioned conventional spool valves structure weakens stability and the reliability of emergency distributing valve to a great extent, can not meet the safe and reliable stable basic demand of Turbine Governor System, therefore optimizes emergency distributing valve structure imperative.
Summary of the invention
The purpose of this utility model is the defect existed for overcoming prior art, proposes a kind of for the large discharge plug-in type ring cavity control type emergency distributing valve in Turbine Governor System.
The technical solution adopted in the utility model is: large discharge plug-in type ring cavity control type emergency distributing valve, comprise emergency distributing valve and supporting solenoid directional control valve and electro-hydraulic reversing valve, it is characterized in that described emergency distributing valve is made up of an emergency distributing valve A block and the split of an emergency distributing valve B block, two cartridge valves are respectively provided with respectively in the valve body of emergency distributing valve A block and emergency distributing valve B block, the spool upper end of described cartridge valve and valve seat mouth adopt conical surface form to form to seal to be paid, the valve body side of described emergency distributing valve A block and emergency distributing valve B block and gland place, below are equipped with the straight-through Welded fitting of end, described end leads directly to Welded fitting respectively with on the cartridge valve spool in emergency distributing valve A block and emergency distributing valve B block valve body, lower compression face regional connectivity.
Be provided with switch bracket device in described emergency distributing valve B block, switch bracket device is formed by indicating axle, indicating arm and switch bracket, is transferred to outer welding system by the spool position signal of limit switch collection correspondence that switch bracket is installed.
Compared with prior art, the beneficial effects of the utility model and feature are:
1. main body adopts the split-type structural be made up of an emergency distributing valve A block and an emergency distributing valve B block and solenoid directional control valve, electro-hydraulic reversing valve, its emergency distributing valve inside, not containing sliding valve structure, replaces as the cartridge valve that sealability is better, working stability is stronger, flow area is larger.The introducing of cartridge valve solves oil rub resistance poor performance, the processing request harshness of conventional spool valves structure and can not seal the drawbacks such as brought zero drift completely, advantage large for himself flow area is incorporated in emergency distributing valve simultaneously, the difficulty faced when improving the design of emergency distributing valve large discharge to a certain extent, contributes to the R & D design of large discharge emergency distributing valve.
2. valve seat mouth adopts cone valve seal form, and sealability is better, decreases the zero drift phenomenon in emergency distributing valve introducing hydraulic system to a certain extent.
3. valve seat mouth adopts cone valve structure, and oil rub resistance ability is stronger, and flow area is larger.
4., than conventional spool valves structure, difficulty of processing of the present utility model reduces, and reduces processing cost to a great extent, improves work efficiency.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic appearance of the utility model embodiment;
Fig. 2 is emergency distributing valve A block front section view of the present utility model;
Fig. 3 is the emergency distributing valve A block outward appearance plan view of Fig. 2;
Fig. 4 is emergency distributing valve B block front section view of the present utility model.
Number in the figure represents respectively: 1-emergency distributing valve A block, 2-emergency distributing valve B block, 3-two-bit triplet solenoid directional control valve, 4-two four-way electro-hydraulic reversing valves, 5-flange plate, 6-valve body, 7-cartridge valve lining valve seat, 8-cartridge valve spool, 9-Compress Spring, 10-gland, the straight-through Welded fitting of 11-end, 12-spool limit stoper, 13-indicates axle, 14-indicating arm, 15-switch bracket.
Embodiment
Fig. 1 is the overall structure signal of one of the utility model embodiment, and it comprises an emergency distributing valve A block 1, emergency distributing valve B block 2 and a set of two-bit triplet solenoid directional control valve 3, a set of two four-way electro-hydraulic reversing valve 4 splits composition.Below the valve body side of emergency distributing valve A block 1 and emergency distributing valve B block 2 and valve body, gland place is all connected with the straight-through Welded fitting of end, the straight-through Welded fitting of end is connected with the upper and lower compression face region of the cartridge valve spool in valve body respectively, the straight-through other one end of Welded fitting of end is communicated with control oil pipe road, other one end of pipeline is connected to each hydraulic fluid port of base plate below two corresponding four-way electro-hydraulic reversing valves 4, emergency distributing valve B block 2 lead directly to Welded fitting link position with the end in emergency distributing valve A block 1 and connected region consistent.
Shown in Fig. 2, emergency distributing valve A block 1 comprises a valve body 6, two cartridge valve spools 8, two cartridge valve lining valve seats, 7, three flange plate, 5, two glands 10, two Compress Springs 9, a set of spool limit stoper 12, four overlaps the straight-through Welded fitting 11 of end, and some bolts, nut and Sealing.Wherein: valve body 6 is cavity type structure, there is the shoulder hole of two parallel similar its inside, and two shoulder holes are communicated with in intermediate section perforate; Have a card (as shown in Figure 3) in the side of valve body 6, card center offers runner mouth and is communicated with the shoulder hole of valve body 6 inside; The side of valve body 6 is also provided with the tapped hole for being connected with the straight-through Welded fitting 11 of end and the welding angle for being connected with exterior line.Cartridge valve spool 8 is multidiameter shaft shape, the cylindrical sides of spool offers the groove installing Sealing.Cartridge valve lining valve seat 7 is cylindrical sleeve shape part, and the Excircle machining of its one end has screw thread, and the end face of the other end is processed with the sealing cone matched with cartridge valve spool 8 upper-end surface.Flange plate 5 is general structure, and gland 10 is flight form.Spool limit stoper 12 is made up of Limit screw, nut and Sealing, and spool limit stoper 12 peaks on the cartridge valve spool on the left side with the left side gland of the form of being threaded through valve body 6.
In emergency distributing valve A block 1, two cartridge valve lining valve seats 7 are to be threadedly connected to valve body 6 inner upper end, two the cartridge valve spools 8 being set with some Sealings are through at valve body 6 inside, the cone valve jaw of two cartridge valve lining valve seats 7 is pressed under the effect of two Compress Springs 9, the other end of two Compress Springs 9 is compressed by two glands 10, two glands 10 are close to the lower end surface of valve body 6 under the effect of some screw bolt and nut, the upper-end surface of valve body 6 is close to by two flange plate 5 under the effect of some screw bolt and nut, 3rd flange plate is close on the side of valve body 6 under the effect of some screw bolt and nut, two straight-through Welded fittings 11 of end are tightened on two glands 10 with the form of being threaded, two straight-through Welded fittings 11 of end are tightened on guard valve valve body 6 side with the form of being threaded.
Shown in Fig. 4, the main structure of emergency distributing valve B block 2 is substantially identical with emergency distributing valve A block 1, difference is: emergency distributing valve B block 2 does not establish spool limit stoper, emergency distributing valve B block 2 is equiped with a set of switch bracket device, switch bracket device comprises instruction axle 13, indicating arm 14 and switch bracket 15, instruction axle 13 is multidiameter shaft form with indicating arm 14, switch bracket 15 is right angle plank frame, switch bracket 15 is fixed on the gland of valve body on the right of emergency distributing valve B block 2, by on switch bracket 15 install limit switch collection correspondence spool position signal and be transferred to outer connected control system.
The two-bit triplet solenoid directional control valve 3 that the utility model adopts and two four-way electro-hydraulic reversing valves 4 are universal valve member.
The utility model is worked by two emergency distributing valves, a set of two four-way electro-hydraulic reversing valves 4 and a set of two-bit triplet solenoid directional control valve 3 one, realizes the function of switching four cartridge valve spool two ends control chamber oil state.During work, emergency distributing valve A block 1 and the upper and lower two compression face regions of the cartridge valve spool of emergency distributing valve B block 2 inside are communicated with respectively and switch by two four-way electro-hydraulic reversing valves 4 pressure oil or oil return that functional state drainage comes, cartridge valve spool mounting spring one side region cut-in pressure oil, when oil return is connected in its opposite side region, cartridge valve spool under the effect of pressure oil and spring-return power to the direction motion making cartridge valve valve port close until valve port is closed; Cartridge valve spool mounting spring one side region connects oil return, and during its opposite side region cut-in pressure oil, cartridge valve spool moves until valve port is opened completely to the direction making cartridge valve valve port open under the effect of pressure oil.Emergency distributing valve A block 1 exists all in pairs with cartridge valve in emergency distributing valve B block 2, in emergency distributing valve working state, when in emergency distributing valve A block 1 or emergency distributing valve B block 2, a cartridge valve is in opening state, another cartridge valve must be in closed condition, the corresponding relation opened according to paired cartridge valve, close, emergency distributing valve respectively by pressure oil, oil return with opens in servomotor, close chamber and be communicated with and disconnection.
Claims (2)
1. a large discharge plug-in type ring cavity control type emergency distributing valve, comprise emergency distributing valve and supporting solenoid directional control valve and electro-hydraulic reversing valve, it is characterized in that described emergency distributing valve is made up of an emergency distributing valve A block and the split of an emergency distributing valve B block, two cartridge valves are respectively provided with respectively in the valve body of emergency distributing valve A block and emergency distributing valve B block, the spool upper end of described cartridge valve and valve seat mouth adopt conical surface form to form to seal to be paid, the valve body side of described emergency distributing valve A block and emergency distributing valve B block and gland place, below are equipped with the straight-through Welded fitting of end, described end leads directly to Welded fitting respectively with on the cartridge valve spool in emergency distributing valve A block and emergency distributing valve B block valve body, lower compression face regional connectivity.
2. large discharge plug-in type ring cavity control type emergency distributing valve according to claim 1, it is characterized in that being provided with switch bracket device in described emergency distributing valve B block, switch bracket device is formed by indicating axle, indicating arm and switch bracket, is transferred to outer welding system by the spool position signal of limit switch collection correspondence that switch bracket is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520252759.9U CN204532688U (en) | 2015-04-24 | 2015-04-24 | Large discharge plug-in type ring cavity control type emergency distributing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520252759.9U CN204532688U (en) | 2015-04-24 | 2015-04-24 | Large discharge plug-in type ring cavity control type emergency distributing valve |
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| Publication Number | Publication Date |
|---|---|
| CN204532688U true CN204532688U (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520252759.9U Active CN204532688U (en) | 2015-04-24 | 2015-04-24 | Large discharge plug-in type ring cavity control type emergency distributing valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033590A (en) * | 2015-09-02 | 2015-11-11 | 长江三峡能事达电气股份有限公司 | Machining process of valve body of large-flow cartridge valve |
-
2015
- 2015-04-24 CN CN201520252759.9U patent/CN204532688U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105033590A (en) * | 2015-09-02 | 2015-11-11 | 长江三峡能事达电气股份有限公司 | Machining process of valve body of large-flow cartridge valve |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |