CN204187056U - Turbine high-pressure admission safety check - Google Patents
Turbine high-pressure admission safety check Download PDFInfo
- Publication number
- CN204187056U CN204187056U CN201420571503.XU CN201420571503U CN204187056U CN 204187056 U CN204187056 U CN 204187056U CN 201420571503 U CN201420571503 U CN 201420571503U CN 204187056 U CN204187056 U CN 204187056U
- Authority
- CN
- China
- Prior art keywords
- safety check
- flap
- valve body
- rocking arm
- turbine high
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Check Valves (AREA)
Abstract
A kind of turbine high-pressure admission safety check.Solve existing safety check and open and close slower problem.It comprises valve body, rocking arm, flap, sealing seat and drive unit, medium channel is provided with in described valve body, described rocking arm is connected with flap, valve clack sealing surface on flap and the valve body sealing surface on valve body seal mutually and form valve seal pair, described flap has the primary importance that seals mutually with valve body and rotates the second place making medium channel circulation medium, and described drive unit is offseted by driveshaft and rocking arm.The beneficial effects of the utility model are; common safety check adds drive unit; when turbine system breaks down; pipeline pressure medium reduces; flap is energy quick closedown under self gravitation and drive unit effect; to prevent pipe-line system steam and condensed water from flowing backwards, the capital equipments such as protection steam turbine, what ensure product changes up pass requirement soon.
Description
Technical field
The utility model relates to a kind of valve, is specifically related to a kind of turbine high-pressure admission safety check.
Background technique
Safety in production is the most important thing that should be noted that in power industry high speed development process, before this Japan 9.0 grades of earthquakes cause the nuclear leakage of Fukushima first nuclear power station just to beat alarm bell to us.
The auxiliary products of turbine high-pressure admission safety check mainly steam turbine generator; it is the special fast throttle down of protection Turbo-generator Set; this valve installation is on cold section of steam turbine reheating, the horizontal pipeline of auxiliary steam; prevent water and steam from pouring in down a chimney and enter high-pressure cylinder; thus the safety of steam turbine is impacted, this product relates to the visual plant of turbine system safety.
When turbine system breaks down, pipeline pressure medium reduces, and when the flap of existing turbine high-pressure admission safety check is closed under self gravitation, flap exists the risk that cannot close completely, and closes comparatively slow, there is great potential safety hazard.
Summary of the invention
Open and close comparatively slow and flap exists the problem that cannot close completely for solving existing safety check in background technique, the utility model provides a kind of turbine high-pressure admission safety check.
The technical solution of the utility model is: a kind of turbine high-pressure admission safety check, comprise valve body, rocking arm, flap, sealing seat and drive unit, medium channel is provided with in described valve body, described rocking arm is connected with flap, valve clack sealing surface on flap and the valve body sealing surface on valve body seal mutually and form valve seal pair, described flap has the primary importance that seals mutually with valve body and rotates the second place making medium channel circulation medium, and described drive unit is offseted by driveshaft and rocking arm.
Improve as one of the present utility model, described drive unit is pneumatic actuator, and described pneumatic actuator comprises housing and is located at the Returnning spring in housing.
As further improvement of the utility model, the space in housing is divided into air-inlet cavity and counter balance pocket by described driveshaft, and described air-inlet cavity is connected by pipeline with counter balance pocket, and described pipeline is provided with by-pass cock.
As further improvement of the utility model, described driveshaft offsets by helping pass bar and rocking arm.
As further improvement of the utility model, described rocking arm is provided with journal stirrup, and described journal stirrup is hinged with projection, and bar is closed in described helping and projection offsets.
As further improvement of the utility model, described projection is cylindrical, and the described side of closing bar and cylindrical bump that helps offsets.
As further improvement of the utility model, described rocking arm and flap are removably connected by bolt, nut.
As further improvement of the utility model, described valve clack sealing surface and valve body sealing surface are all welded with cemented carbide.
As further improvement of the utility model, there is angle a between the vertical line of described valve seal pair and medium channel center line, described angle a is less than 10 degree
The beneficial effects of the utility model are; common safety check adds drive unit; when turbine system breaks down; pipeline pressure medium reduces; flap is energy quick closedown under self gravitation and drive unit effect; to prevent pipe-line system steam and condensed water from flowing backwards, the capital equipments such as protection steam turbine, what ensure product changes up pass requirement soon.It is simple and reasonable, easy to process that the utility model also has structure, the advantages such as reliable performance.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the utility model embodiment.
Accompanying drawing 2 is principle schematic of the present utility model.
In figure, 1, valve body; 11, medium channel; 12, valve body sealing surface; 2, rocking arm; 21, journal stirrup; 22, projection; 23, bolt; 24, nut; 3, flap; 31, valve clack sealing surface; 4, sealing seat; 5, drive unit; 51, driveshaft; 52, pneumatic actuator; 521, housing; 522, Returnning spring; 523, air-inlet cavity; 524, counter balance pocket; 525, pipeline; 526, by-pass cock; 53, pass bar is helped; 6, valve seal is secondary; 7, cemented carbide.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described further:
Shown in Fig. 1 composition graphs 2, a kind of turbine high-pressure admission safety check, comprise valve body 1, rocking arm 2, flap 3, sealing seat 4 and drive unit 5, medium channel 11 is provided with in described valve body 1, described rocking arm 2 is connected with flap 3, valve clack sealing surface 31 on flap 3 seals with valve body sealing surface 12 phase on valve body 1 and forms valve seal pair 6, described flap 3 has the primary importance that seals with valve body 1 phase and rotates the second place making medium channel 11 circulation medium, described drive unit 5 is offseted by driveshaft 51 and rocking arm 2, specifically, described driveshaft 51 offsets with rocking arm 2 by helping pass bar 53.Help pass bar 53 to be flexibly connected with rocking arm 2, make automatically to adjust centering when flap and valve seal, ensure machining accuracy simultaneously, reduce the probability causing flap stuck.The beneficial effects of the utility model are; common safety check adds drive unit; when turbine system breaks down; pipeline pressure medium reduces; flap is energy quick closedown under self gravitation and drive unit effect; to prevent pipe-line system steam and condensed water from flowing backwards, the capital equipments such as protection steam turbine, what ensure product changes up pass requirement soon.It is simple and reasonable, easy to process that the utility model also has structure, the advantages such as reliable performance.
Described drive unit 5 is pneumatic actuator 52, the Returnning spring 522 that described pneumatic actuator 52 comprises housing 521 and is located in housing 521.Specifically, the space in housing 521 is divided into air-inlet cavity 523 and counter balance pocket 524 by described driveshaft 51, and described air-inlet cavity 523 is connected by pipeline 525 with counter balance pocket 524, and described pipeline 525 is provided with by-pass cock 526.Actuator's air inlet late gate is opened rapidly, ensures fast ETAD expected time of arrival and departure requirement, is closed after dying by spring devote every effort to help, make valve quick-make.In particular, in order to ensure the working life of product, by-pass cock can be opened as required, and by-pass cock to open size adjustable, the suction pressure of part can be reduced, driveshaft is operated reliable, and air-inlet cavity is connected with counter balance pocket the parts in housing also can be avoided to be cavitated.In particular, described by-pass cock is manual ball valve.
Described rocking arm 2 is provided with journal stirrup 21, and described journal stirrup 21 is hinged with projection 22, and described helping is closed bar 53 and offseted with projection 22.Specifically, described projection 22 is cylindrical, and described helping is closed bar 53 and offseted with the side of cylindrical bump 22.It is reliable that such structure makes product top press, and ensures that valve can quick opening and closing.
Described rocking arm 2 is removably connected by bolt 23, nut 24 with flap 3.Avoid the pin of conventional check valves directly that rocker-arm roller pin is dead, the mode locking by spot welding is fixed the problem causing flap non-exchange, this structure makes valve possess the function of on-line maintenance, and inner body meets on-the-spot requirement of repeatedly dismantling, and makes product dismounting, easy to maintenance.
Described valve clack sealing surface 31 and valve body sealing surface 12 are all welded with cemented carbide 7.Such structure adds the working life of sealing surface.
There is angle a between the vertical line of described valve seal pair 6 and medium channel 11 center line, described angle a is less than 10 degree.In particular, described angle is 5 degree.This structural design can shorten keying stroke, reduces the shut-in time, accomplishes quick closedown.And the shortening opening and closing stroke also must make the impact force of product sealing surface reduce, thus add the working life of sealing surface.
When valve needs to open, in solenoid valve, electromagnet is charged, and the air-inlet cavity promotion driveshaft that source of the gas enters housing is up, and medium flows into medium channel simultaneously, backs down flap, flap Unscrew, helps pass bar to move together with driveshaft.Once there is accident, electromagnet dead electricity, solenoid valve commutates, source of the gas enters cylinder balancing chamber, and the gas of air-inlet cavity is discharged fast by outlet valve, and driveshaft is descending under the effect of Returnning spring, driving helps closes bar extrusion lug, makes rocking arm drive flap quick closedown, prevents medium from flowing backwards.
Every technician's notice: although the utility model describes according to above-mentioned embodiment; but invention thought of the present utility model is not limited in this model utility; the repacking of any utilization inventive concept, all will include in this patent scope of patent protection.
Claims (9)
1. a turbine high-pressure admission safety check, it is characterized in that: comprise valve body (1), rocking arm (2), flap (3), sealing seat (4) and drive unit (5), medium channel (11) is provided with in described valve body (1), described rocking arm (2) is connected with flap (3), valve clack sealing surface (31) on flap (3) seals mutually with the valve body sealing surface (12) on valve body (1) and forms valve seal pair (6), described flap (3) has the second place that the primary importance that seals mutually with valve body (1) and rotation make medium channel (11) circulation medium, described drive unit (5) is offseted by driveshaft (51) and rocking arm (2).
2. turbine high-pressure admission safety check according to claim 1, it is characterized in that described drive unit (5) is for pneumatic actuator (52), described pneumatic actuator (52) comprises housing (521) and is located at the Returnning spring (522) in housing (521).
3. turbine high-pressure admission safety check according to claim 2, it is characterized in that the space in housing (521) is divided into air-inlet cavity (523) and counter balance pocket (524) by described driveshaft (51), described air-inlet cavity (523) is connected by pipeline (525) with counter balance pocket (524), and described pipeline (525) is provided with by-pass cock (526).
4. turbine high-pressure admission safety check according to claim 1, is characterized in that described driveshaft (51) offsets by helping pass bar (53) and rocking arm (2).
5. turbine high-pressure admission safety check according to claim 4, is characterized in that described rocking arm (2) is provided with journal stirrup (21), described journal stirrup (21) is hinged with projection (22), and described helping is closed bar (53) and offseted with projection (22).
6. turbine high-pressure admission safety check according to claim 5, is characterized in that described projection (22) is cylindrical, and described helping is closed bar (53) and offseted with the side of cylindrical bump (22).
7. turbine high-pressure admission safety check according to claim 1, is characterized in that described rocking arm (2) and flap (3) are removably connected by bolt (23), nut (24).
8. turbine high-pressure admission safety check according to claim 1, is characterized in that described valve clack sealing surface (31) and valve body sealing surface (12) are all welded with cemented carbide (7).
9. turbine high-pressure admission safety check according to claim 1, it is characterized in that there is angle a between the vertical line of described valve seal pair (6) and medium channel (11) center line, described angle a is less than 10 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571503.XU CN204187056U (en) | 2014-09-30 | 2014-09-30 | Turbine high-pressure admission safety check |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420571503.XU CN204187056U (en) | 2014-09-30 | 2014-09-30 | Turbine high-pressure admission safety check |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204187056U true CN204187056U (en) | 2015-03-04 |
Family
ID=52619058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420571503.XU Active CN204187056U (en) | 2014-09-30 | 2014-09-30 | Turbine high-pressure admission safety check |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204187056U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747788A (en) * | 2015-04-01 | 2015-07-01 | 上海阀门厂有限公司 | Opening-closing position indicating structure of low-pressure-difference opening check valve |
| CN106402410A (en) * | 2016-09-30 | 2017-02-15 | 大连理工大学 | Broad-channel electromagnetic butterfly valve capable of being opened and closed immediately |
-
2014
- 2014-09-30 CN CN201420571503.XU patent/CN204187056U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747788A (en) * | 2015-04-01 | 2015-07-01 | 上海阀门厂有限公司 | Opening-closing position indicating structure of low-pressure-difference opening check valve |
| CN104747788B (en) * | 2015-04-01 | 2016-10-19 | 上海阀门厂股份有限公司 | A kind of position of the switch instruction structure of low voltage difference opens check valve |
| CN106402410A (en) * | 2016-09-30 | 2017-02-15 | 大连理工大学 | Broad-channel electromagnetic butterfly valve capable of being opened and closed immediately |
| CN106402410B (en) * | 2016-09-30 | 2018-12-18 | 大连理工大学 | A kind of fat pipe electromagnetism butterfly valve immediately switched |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204187056U (en) | Turbine high-pressure admission safety check | |
| CN203670846U (en) | Flat gate valve with under-pressure replace valve rod and balance rod | |
| CN102996852A (en) | Hydraulic self-operated three-way valve | |
| CN203627882U (en) | Up-mounted type ball valve with valve seat capable of being quickly dismounted and maintained online | |
| CN206429712U (en) | Gas transmission station self-operated type emergency safety stop valve | |
| CN201827393U (en) | Special double-seal hydraulic control butterfly valve for hydroelectricity | |
| CN202451900U (en) | Right-angle quick closing check valve | |
| CN104373606A (en) | Elastic stop valve and operation method thereof | |
| CN209245334U (en) | High-pressure self-tightening sealing core | |
| CN114635973A (en) | Main steam high-temperature high-pressure valve seat-replaceable stop valve | |
| CN203189721U (en) | High-strength all-forging supercritical hydrostatic test blocking valve | |
| CN210440623U (en) | Multifunctional heavy hammer self-operated double-sealing swing check valve | |
| CN202691177U (en) | Y-typed quick closing check valve | |
| CN203374898U (en) | Knocking-proof type check valve | |
| CN102913632B (en) | A kind of valve body and valve seat double-body bike balanced valve | |
| CN207569283U (en) | A kind of steam-extracting type speed closes non-return valve | |
| CN207848492U (en) | A kind of check-valves with the micro- slow keying effect of more flaps | |
| CN201787162U (en) | Electromagnetic relief valve | |
| CN205780902U (en) | A kind of quick-closing valve controlled by instrument supply gas | |
| CN206496043U (en) | A kind of high-pressure large-caliber Bivalved Wafer Check Valves | |
| CN110030046A (en) | A kind of condensate system and operation method for Turbo-generator Set | |
| CN205895551U (en) | Netted pneumatic valve of piston compressor | |
| CN209725249U (en) | Flue damper plate valve | |
| CN208651691U (en) | Diaphragm valve positioner | |
| CN204450176U (en) | Hp and lp bypass valve grinding tackling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |