CN203925608U - Quick-break valve driving circuit of small steam turbine - Google Patents
Quick-break valve driving circuit of small steam turbine Download PDFInfo
- Publication number
- CN203925608U CN203925608U CN201420300983.6U CN201420300983U CN203925608U CN 203925608 U CN203925608 U CN 203925608U CN 201420300983 U CN201420300983 U CN 201420300983U CN 203925608 U CN203925608 U CN 203925608U
- Authority
- CN
- China
- Prior art keywords
- power supply
- alternating current
- coil
- relay
- contactor
- 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.)
- Expired - Fee Related
Links
- 230000006378 damage Effects 0.000 abstract description 4
- 208000027418 Wounds and injury Diseases 0.000 abstract description 3
- 208000014674 injury Diseases 0.000 abstract description 3
- 230000001012 protector Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 239000007858 starting material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010723 turbine oil Substances 0.000 description 1
Landscapes
- Control Of Turbines (AREA)
Abstract
A small-sized steam turbine quick-break valve driving circuit comprises a direct current relay, a single-phase alternating current motor, a time delay relay, an alternating current contactor, a protector, a power indicator, a motor operation indicator and a selection clip; the single-phase alternating current motor is connected with an alternating current power supply through an alternating current contactor main contact, a positive electrode and a negative electrode of the alternating current power supply are respectively provided with a fuse, a power indicator lamp is connected to the positive electrode and the negative electrode of the alternating current power supply, one end of a delay relay coil and one end of an alternating current contactor coil are connected with a negative electrode of the alternating current power supply, the positive electrode of the alternating current power supply is simultaneously connected with two lines, one auxiliary contact is connected with the other end of the delay relay coil through a normally open auxiliary contact of a direct current relay, the other auxiliary contact is connected with the alternating current contactor coil through. The utility model discloses can effectively cut off pressure oil, avoid the quick-break door to open again, ensure that steam turbine safety and stability shuts down, effectively prevent equipment and personal injury accident.
Description
Technical field
The utility model belongs to machinery field, relates in particular to the quick-break valve-driving circuit that a kind of small steam turbine can emergency.
Background technique
Nanjing steam turbine plant C15-3.43/1.27-1 type Emergency Trip System of Steam Turbines is mainly accepted from stopping signals such as turbine body security monitoring instrument, turbine oil system, condenser vacuum, generator tripping, hand trip(ping)s; interdict accordingly relay through logical process rear driving and complete steam turbine emergency trip function, outwards send trip reason and index signal simultaneously.But in using process, finding, there is following defect in this Emergency Trip System of Steam Turbines:
(1) steam turbine emergency trip is sent after chaser instruction, AST, OPC move, main inlet throttle-stop valve, throttle are closed, but 4s dead electricity after solenoid valve action, safe oil pressure re-establishes, power oil arrives in oil engine chamber by oilhole in synchronizer, reopens because oil pressure effect makes automatic main throttle valve.
(2) need operations staff's manually-operable synchronizer to close the oil circuit of automatic main throttle valve, this action need time about 30 seconds.
(3) in servicely run into the situation that throttle is not tight, steam enters steam turbine and causes unit hypervelocity, and mechanical flying barrel course of action needs about 8 seconds.If flying barrel is motionless, will cause equipment damage, and the life safety that jeopardizes personnel.
Summary of the invention
The utility model aims to provide one can guarantee that Turbine Safety stops, thereby avoids Steam Turbine Over-speed Accident to cause the small steam turbine quick-break valve-driving circuit of equipment and personal injury accident.
For this reason, the solution that the utility model is taked is:
A kind of small steam turbine quick-break valve-driving circuit, comprises DC relay, it is characterized in that, sets up load motor, time delay relay, A.C. contactor, protecting device, power supply indicator, motor run indicator and selects clamp, load motor connects ac power supply by A.C. contactor main contact, on ac power supply both positive and negative polarity, be respectively equipped with a protecting device, power supply indicator is connected on ac power supply both positive and negative polarity, time delay relay coil and ac contactor coil one end are connected to ac power supply negative pole, ac power supply is anodal by selecting clamp 1, 2 contacts whiles and two connections, article one, often opening auxiliary contact by DC relay is connected with the other end of time delay relay coil, another is connected with the ac contactor coil the other end by opening auxiliary contact by the instantaneous make delay of time delay relay, the motor run indicator of ac power supply is connected and is selected clamp 3 by ac contactor coil, 4 contacts.
The beneficial effects of the utility model are:
The utility model sends halt turbines signal can realize motor driving synchronizer; effectively cut-out pressure oil, avoids quick-break door to reopen, and reduces post personnel's operational risk simultaneously; guarantee the stable shutdown of Turbine Safety, prevent equipment and personal injury accident that Steam Turbine Over-speed Accident causes.
Brief description of the drawings
Fig. 1 is motor main circuit figure;
Fig. 2 is motor control loop figure.
Embodiment
From accompanying drawing, the utility model small steam turbine quick-break valve-driving circuit comprises DC relay KLC, load motor D, time delay relay SJ, A.C. contactor ZJ, protecting device FU, power supply indicator BD, motor run indicator HD and selects clamp KK.Load motor D connects 220V ac power supply by A.C. contactor ZJ, 220V ac power supply is taken from the low platen in high and low voltage electric distribution chamber, on ac power supply both positive and negative polarity, be respectively equipped with a protecting device FU, power supply indicator BD is connected on ac power supply both positive and negative polarity, time delay relay SJ is connected and is selected 1 of clamp KK by DC relay KLC coil, 2 contacts, A.C. contactor ZJ one end connects 220V ac power supply, the other end is connected to DC relay KLC coil and is selected 1 of clamp KK by time delay relay SJ coil, between 2 contacts on circuit, the motor run indicator HD that connects ac power supply is connected and is selected 3 of clamp KK by A.C. contactor ZJ coil, 4 contacts.
Basic principle of the present utility model is: interlock and get a pair of auxiliary contact of often opening to the DC relay KLC of solenoid valve action from unit tripping, control time delay relay SJ starting coil, normal opened contact control A.C. contactor ZJ is opened in recycling time delay relay SJ moment make delay, control starter gate valve load motor D running time, starter gate valve cuts out completely, the unit tripping load motor D that links closes starter gate valve automatically, automatic main throttle valve bottom oil pressure can not be set up, thereby effectively avoid automatic main throttle valve to reopen, cut off unit admission.
Concrete driving process is: select clamp KK to choose automatically; select 1,2 contacts of clamp KKD to connect, when after steam turbine set emergency stop valve trip, protection contact is connected; DC relay KLC coil obtains electric; DC relay KLC junction closure, time delay relay SJ coil obtains electric, time delay relay SJ Time Delay Opening contact moment closure; A.C. contactor ZJ coil obtains electric; A.C. contactor ZJ main contact closure, when load motor D starts, HD is bright for operation red led.
Claims (1)
1. a small steam turbine quick-break valve-driving circuit, comprises DC relay, it is characterized in that, sets up load motor, time delay relay, A.C. contactor, protecting device, power supply indicator, motor run indicator and selects clamp, load motor connects ac power supply by A.C. contactor main contact, on ac power supply both positive and negative polarity, be respectively equipped with a protecting device, power supply indicator is connected on ac power supply both positive and negative polarity, time delay relay coil and ac contactor coil one end are connected to ac power supply negative pole, ac power supply is anodal by selecting clamp 1, 2 contacts whiles and two connections, article one, often opening auxiliary contact by DC relay is connected with the other end of time delay relay coil, another is opened auxiliary contact by the instantaneous make delay of time delay relay and is connected with the ac contactor coil the other end, the motor run indicator of ac power supply is connected and is selected clamp 3 by ac contactor coil, 4 contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420300983.6U CN203925608U (en) | 2014-06-09 | 2014-06-09 | Quick-break valve driving circuit of small steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420300983.6U CN203925608U (en) | 2014-06-09 | 2014-06-09 | Quick-break valve driving circuit of small steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203925608U true CN203925608U (en) | 2014-11-05 |
Family
ID=51821437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420300983.6U Expired - Fee Related CN203925608U (en) | 2014-06-09 | 2014-06-09 | Quick-break valve driving circuit of small steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203925608U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107842398A (en) * | 2017-11-22 | 2018-03-27 | 华润水泥技术研发有限公司 | A kind of steam turbine bavin electricity security personnel's control system and its control method |
| CN109510183A (en) * | 2018-12-27 | 2019-03-22 | 北京术锐技术有限公司 | A kind of device avoiding inrush current |
-
2014
- 2014-06-09 CN CN201420300983.6U patent/CN203925608U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107842398A (en) * | 2017-11-22 | 2018-03-27 | 华润水泥技术研发有限公司 | A kind of steam turbine bavin electricity security personnel's control system and its control method |
| CN107842398B (en) * | 2017-11-22 | 2023-09-22 | 华润水泥技术研发有限公司 | Diesel-electric safety control system of steam turbine and control method thereof |
| CN109510183A (en) * | 2018-12-27 | 2019-03-22 | 北京术锐技术有限公司 | A kind of device avoiding inrush current |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203925608U (en) | Quick-break valve driving circuit of small steam turbine | |
| CN203287716U (en) | Safety control system of engineering machinery engine | |
| CN201557068U (en) | Control device of electromotor lift-up oil pump for fan | |
| CN103384059B (en) | A kind of vacuum circuit breaker energy storage motor protection circuit | |
| CN204290071U (en) | Looped network cabinet switch mechanism intelligent controlling device | |
| CN201757073U (en) | Safe & intelligent type explosionproof air blower electric control box | |
| CN204103785U (en) | Silicon rectifier draw-gear | |
| CN201202584Y (en) | Splashing-proof and signal apparatus of small-sized hydroelectric generating set | |
| CN203800846U (en) | Intelligent dual-pump controller rear cover wiring circuit | |
| CN204877778U (en) | Novel device of pure mechanical manual control of hydroelectric set speed control system | |
| CN205089581U (en) | Compressor double pump fuel feeding interlocking control circuit | |
| CN203299612U (en) | Gas excess pressure generator set control unit module | |
| CN204368983U (en) | A kind of safe and reliable band conveyor stay cord master cock | |
| CN204089648U (en) | Autotransformer reduced-voltage starting cabinet | |
| CN203584654U (en) | Automatic starting and fault alarming system for water jacket heater for diesel generating set | |
| CN103057438B (en) | Silicon rectifier automatic control device | |
| CN202966005U (en) | Silicon rectifier automatic control device | |
| CN202837870U (en) | Electric control system of novel electric hydraulic grab bucket | |
| CN102778847B (en) | Automatic shutdown method of electric towing turbine unit in failure of controlling system and oil system | |
| CN204179984U (en) | A kind of three-phase power supply phase sequence detects and automatic conversioning controling circuit | |
| CN205017240U (en) | Diesel generator control circuit that magnetizes | |
| CN204203860U (en) | Main frame and peripheral hardware switching sequence control device | |
| CN202628577U (en) | Anti-explosion control system for fan power supply | |
| CN208835734U (en) | A kind of steam turbine generator trip protection circuit | |
| CN202586491U (en) | Automatic switching device of low-voltage backup power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20200609 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |