CN109782637A - The big protection signal interface unit of turbine shaft vibration - Google Patents
The big protection signal interface unit of turbine shaft vibration Download PDFInfo
- Publication number
- CN109782637A CN109782637A CN201811467800.9A CN201811467800A CN109782637A CN 109782637 A CN109782637 A CN 109782637A CN 201811467800 A CN201811467800 A CN 201811467800A CN 109782637 A CN109782637 A CN 109782637A
- Authority
- CN
- China
- Prior art keywords
- relay
- relay card
- card
- big
- controller
- 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.)
- Granted
Links
Landscapes
- Control Of Turbines (AREA)
Abstract
The big protection signal interface unit of turbine shaft vibration, is related to field of signal transmissions.The present invention is that structure is complicated in order to solve existing relay extension cabinet, and interface signal is various, and fault point is more, and reliability is low, and there are problems that being not easy to Turbine Safety monitoring and protection system operation and maintenance disadvantage.RS232 programming configuration interface is provided on the front panel of each relay card, external equipment programs configuration interface to relay card Input Software programming in logic configuration by the RS232, a controller is provided on each relay card controller mainboard, each controller is for receiving the big chaser signal of 11 axis vibrations and 22 big alarm signals of axis vibration, and the big chaser signal of 11 axis of input vibration and 22 big alarm signals of axis vibration are handled according to software logic programming configuration, output driving instruction, and received 11 axis of two controllers in each relay card frame shake big chaser signal type it is different.It is used to monitor Turbine Safety.
Description
Technical field
The present invention relates to the turbine shaft vibration between Steam Turbine Safety Monitoring System and quadruple Protection System of Turbin is big
Protect signal interface unit.Belong to field of signal transmissions.
Background technique
In three, the nuclear power projects such as Haiyang, Turbo-generator Set shares 11 bearings, Steam Turbine Safety Monitoring System point
Not in the X of every bearing two sides to monitoring the shaft vibration parameter of steam turbine respectively with Y-direction, therefore it is formed 11 shaft vibration signals
(X to) and 11 shaft vibration signals (Y-direction).Steam Turbine Safety Monitoring System needs big alarm signal that 22 axis monitored shake
(including X to and Y-direction) and 22 axis shake big chaser signal (including X to and Y-direction) give the Protection System of Turbin of quadruple, it is complete
It shakes at axis and protects chaser logical operation greatly.Axis vibration between Steam Turbine Safety Monitoring System and quadruple Protection System of Turbin is big
Protection signaling interface function is by increasing by one between Steam Turbine Safety Monitoring System and quadruple Protection System of Turbin
What relay extension cabinet was realized, which has 22 big " one point four " extension relays and 22 of alarm signal of axis vibration
Big " one point four " the extension relay of chaser signal of a axis vibration, is each responsible for 22 that export Steam Turbine Safety Monitoring System cabinet
The big alarm signal of axis vibration and 22 big chaser signal extensions of axis vibration are alarmed and 88 big chaser signals of axis vibration at 88 axis vibrations are big, after
The big alarm of 88 axis vibration after extension is exported with 88 big chaser signals of axis vibration protect to quadruple steam turbine again by electric appliance extension cabinet
Protecting system completes axis and shakes the logical operation of big chaser function, and prior art is as shown in Figure 1.The interfacing scenario-frame is multiple
Miscellaneous, interface signal is various, at high cost, and fault point is more, and reliability is low, and has and be not easy to Turbine Safety monitoring and protection system
The shortcomings that operation and maintenance.
Summary of the invention
The present invention is that structure is complicated in order to solve existing relay extension cabinet, and interface signal is various, and fault point is more, reliably
Property it is low, and there are problems that being not easy to Turbine Safety monitoring and protection system operation and maintenance disadvantage.Turbine shaft vibration is now provided
Big protection signal interface unit.
The big protection signal interface unit of turbine shaft vibration, it includes two relay card frames 1 and four relay cards 2,
The structure of two relay card frames 1 is identical, and the front surface of each relay card frame 1 is opened there are two relay
Card slot 3, each relay card 2 are entered in a relay card frame 1 by a relay card slot 3, two relays
1 adjacent wall of card frame links together, and connects two relay card frames 1 integral；
The structure of four relay cards 2 is all the same, and each relay card 2 includes that RS232 programs configuration interface 7, relay
Device card controller mainboard 8, relay card relay board 9, controller 11 and solid-state relay 12,
RS232 programming configuration interface 7 is provided on the front panel of each relay card 2, external equipment is compiled by the RS232
Journey configuration interface 7 to 2 Input Software programming in logic configuration of relay card,
A controller 11 is provided on each relay card controller mainboard 8, each controller 11 is for receiving 11
The big chaser signal of axis vibration and 22 big alarm signals of axis vibration, and the big chaser signal of 11 axis of input vibration and 22 axis vibrations are reported greatly
Alert signal is handled according to software logic programming configuration, output driving instruction,
And two controllers in each relay card frame 1,11 received 11 axis shake big chaser signal type not
Together,
Solid-state relay 12 is provided on relay card relay board 9, solid-state relay 12 is for receiving the hair of controller 11
Driving instruction out, so that the instruction of controller output is completed in actuating of relay output.
The invention has the benefit that
The application realizes the integration of the big protection signal interface unit soft and hardware of turbine shaft vibration, modularization and small-sized
Change, the big protection signal interface unit of turbine shaft vibration of the application can be mounted on the same cabinet with Steam Turbine Safety Monitoring System
In.
The application optimizes the big protection of the vibration of the axis between Steam Turbine Safety Monitoring System and quadruple Protection System of Turbin
The interface scheme of signal makes the interface signal between interface arrangement and quadruple Protection System of Turbin be reduced to 16 from 176
It is a, to considerably reduce the quantity of quadruple Protection System of Turbin on-off model input card；Eliminate former technical side
Relay extension cabinet in case, believes so as to avoid between the cabinet between Steam Turbine Safety Monitoring System cabinet and relay extension cabinet
The external power cord of number wiring and relay extension cabinet, reduces the workload of site operation to greatest extent, saves cost.
The application uses Redundancy Design on soft-hardware configuration and function, greatly improves the reliability of interface signal,
Unit axis is efficiently reduced to shake the risk of big chaser false protection and tripping.
Compared with prior art, the response time for big chaser protection signal output that axis can shake shortens the application
47.5ms。
The application has the advantages that cheap, realization is convenient, structure is simple, easy to maintain, high reliablity；The application's
Interface arrangement can optimize the big protection signal of the vibration of the axis between Steam Turbine Safety Monitoring System and quadruple Protection System of Turbin
Interface scheme, play simplified interface structure, reduce cost, improve interface reliability, monitor and protect convenient for Turbine Safety
The effect of system operation and maintenance.
Detailed description of the invention
Fig. 1 is the schematic illustration of prior art；
Fig. 2 is the structural schematic diagram of the big protection signal interface unit of the vibration of turbine shaft described in specific embodiment one；
Fig. 3 is the schematic enlarged-scale view of relay card in Fig. 2；
Fig. 4 is the overall structure signal of the big protection signal interface unit of the vibration of turbine shaft described in specific embodiment one
Figure；
Fig. 5 is the circuit diagram of the big protection signal interface unit of the vibration of turbine shaft described in specific embodiment one；
Fig. 6 is the control logic schematic diagram of controller.
Specific embodiment
Specific embodiment 1: illustrating present embodiment, steam turbine described in present embodiment referring to figs. 1 to Fig. 6
The big protection signal interface unit of axis vibration, it includes two relay card frames 1 and four relay cards 2,
The structure of two relay card frames 1 is identical, and the front surface of each relay card frame 1 is opened there are two relay
Card slot 3, each relay card 2 are entered in a relay card frame 1 by a relay card slot 3, two relays
1 adjacent wall of card frame links together, and connects two relay card frames 1 integral；
The structure of four relay cards 2 is all the same, and each relay card 2 includes that RS232 programs configuration interface 7, relay
Device card controller mainboard 8, relay card relay board 9, controller 11 and solid-state relay 12,
RS232 programming configuration interface 7 is provided on the front panel of each relay card 2, external equipment is compiled by the RS232
Journey configuration interface 7 to 2 Input Software programming in logic configuration of relay card,
A controller 11 is provided on each relay card controller mainboard 8, each controller 11 is for receiving 11
The big chaser signal of axis vibration and 22 big alarm signals of axis vibration, and the big chaser signal of 11 axis of input vibration and 22 axis vibrations are reported greatly
Alert signal is handled according to software logic programming configuration, output driving instruction,
And two controllers in each relay card frame 1,11 received 11 axis shake big chaser signal type not
Together,
Solid-state relay 12 is provided on relay card relay board 9, solid-state relay 12 is for receiving the hair of controller 11
Driving instruction out, so that the instruction of controller output is completed in actuating of relay output.
In present embodiment, two relay card frames 1 are structurally and functionally being mutually redundant, two relay card frames
1 can merge connection by the frame coupling hole 18 at back during installation, and fixed by the mounting hole 17 on each frame
On bracket into cabinet.Each relay card frame 1 has 2 relay card slots respectively, for installing relay card, to protect
Relay card can be smoothly inserted into slot, and accurately connect with the signal connector 5 on 1 backboard of relay card frame, each
Slot upper and lower part has separately designed 1 relay card installation slideway.To guarantee that the interface arrangement and Turbine Safety monitor
The transmission of the signal of system and quadruple Protection System of Turbin, devises 1 group of signal connector 5 and 1 on each frame backboard
The shared output signal terminal row 6 of group.
Relay card is the critical function component of the interface arrangement, and there is relay card front panel RS232 programming configuration to connect
Mouthful, configuration interface is programmed by the RS232, is realized using the programming software in laptop to the soft of A30 relay card
Part programming in logic configuration.
It installs for convenience of the plug of relay card, is separately designed above and below 1 front panel of relay card frame
Relay card installs handle.
As shown in Figure 5 and Figure 6,2 pieces of relay cards on each relay card frame 1 complete " the big jump of any one axis vibration
The big chaser judgement of axis vibration of machine signal " & " in addition to axis itself shakes big alarm signal, the big alarm signal of any one axis vibration " is patrolled
Volume.
By two relay cards on one of relay card frame be respectively designated as No.1 relay card and No. two after
Two relay cards on another relay card frame are respectively designated as No. three relay cards and No. four relays by electric appliance card
Card；
Wherein, No.1 relay card completes the operation of big (X to) the chaser decision logic of 1# -11# shaft vibration, No. two relays
Device card completes the operation of big (Y-direction) the chaser decision logic of 1# -11# shaft vibration, and after judging completion, No.1 relay card is defeated
8 identical axis vibrations big (X to) comprehensive chaser on-off model, No. two relay cards export 8 identical axis and shake big (Y-direction) out
Comprehensive chaser on-off model.The comprehensive chaser signal of 8 identical axis vibrations of No.1 relay card output big (X to) and No. two after
The comprehensive chaser signal of the identical axis vibration of 8 of electric appliance card output big (Y-direction) passes through the printing electricity on the relay card frame backboard
Road plate carries out parallel connection respectively, and by 8 pairs of common terminals row's outputs, that is, realize " 1#~11# axis shakes big chaser (X to) " and
The "or" logic output of " the big chaser (Y-direction) of 1#~11# axis vibration ".8 pairs of common terminals row on the relay card frame backboard is straight
Connect the integrated signal that 8 " the big chaser of 1#~11# axis vibration " is exported to quadruple Protection System of Turbin.
Similarly, the hardware configuration structure of another relay card frame and software logic configuration and one of relay card
Frame 1 is identical, and No. three relay cards complete the operation of big (X to) the chaser decision logic of 1# -11# shaft vibrations, No. four relays
Device card completes the operation of big (Y-direction) the chaser decision logic of 1# -11# shaft vibration.8 pairs on the relay card frame backboard share
Terminal block also directly exports the integrated signal of 8 " the big chaser of 1#~11# axis vibration " to quadruple Protection System of Turbin.
Embodiment 1:
As shown in Fig. 2, which mainly includes the relay card frame 1 and 4 pieces of models of two model IF30
For the relay card 2 of A30.
The relay card frame 1 of two model IF30 is mutually redundant in function and structure, and can pass through frame backboard
On frame coupling hole 18 merge connection；
After the relay card frame 1 of two model IF30 merges connection, Steam Turbine Safety Monitoring System may be mounted to
On the bracket of cabinet, and it is fixed by frame mounting hole 17.
After frame fixes, the relay card 2 of 4 pieces of model A30 is prolonged into A30 relay card installation slideway 4 respectively and is inserted
Enter slot 5, and confirm 2 signal connector 10 of relay card of every piece of model A30 really with A30 relay card slot connector
5 connections are intact；
Steam Turbine Safety Monitoring System, the big protection signal interface unit of turbine shaft vibration and quadruple are completed according to attached drawing 5
Signal wiring between Protection System of Turbin, and complete the big protection signal interface unit of turbine shaft vibration and work on power；
Pass through A30 using laptop and data line according to the A30 relay card controller logic schematic diagram of attached drawing 6
The write-in of relay card 2 " the big chaser of axis vibration that RS232 programming configuration interface 7 on relay card front panel is every piece of model A30
Decision logic program ".
Specific embodiment 2: present embodiment is the big protection signal that shakes to turbine shaft described in specific embodiment one
Interface arrangement is described further, and in present embodiment, each relay card 2 further includes a relay card signal connector
10,
The back of each relay card frame 1 is embedded with two group relay card slot connectors 5,
Each relay card controller mainboard 8 and each relay card relay board 9 respectively pass through a relay card signal
Connector 10 is inserted into a relay card slot connector 5.
Specific embodiment 3: present embodiment is the big protection signal that shakes to turbine shaft described in specific embodiment two
Interface arrangement is described further, and in present embodiment, each relay card frame 1 further includes relay card installation 4 He of slideway
Output signal terminal row 6 is shared,
Relay card installs slideway 4 there are two being respectively set on the inner top surface and inner bottom surface of each relay card frame 1, often
A relay card 2 is respectively on the relay card installation slideway 4 and inner bottom surface on each 1 inner top surface of relay card frame
One relay card installation slideway 4 is inserted into a relay card slot 3, makes each relay card 2 and a group relay card
Connector 5 connects；
The instruction of the controller output is by sharing 6 output of output signal terminal row.
Specific embodiment 4: present embodiment is the big protection signal that shakes to turbine shaft described in specific embodiment one
Interface arrangement is described further, and in present embodiment, each relay card 2 further includes relay card output channel LED indication
Lamp 13, controller state LED light 14 and power supply status LED light 15,
Relay card output channel LED light 13, controller state LED light 14 and power supply status LED light
15 are arranged on the front panel of relay card 2,
Relay card output channel LED light 13, for showing the working condition of solid-state relay 12,
Controller state LED light 14, for showing the working condition of relay card controller mainboard 8,
Power supply status LED light 15, for showing the switch state of power supply.
Specific embodiment 5: present embodiment is the big protection signal that shakes to turbine shaft described in specific embodiment four
Interface arrangement is described further, and in present embodiment, the solid-state relay 12 on each relay card 2 has 16, relay
Card output channel LED light 13 be 16, each relay card output channel LED light 13 for show a solid-state after
The working condition of electric appliance 12.
Claims (6)
1. the big protection signal interface unit of turbine shaft vibration, which is characterized in that it includes two relay card frames (1) and four
Relay card (2),
The structure of two relay card frames (1) is identical, and the front surface of each relay card frame (1) is opened there are two relay
Card slot (3), each relay card (2) are entered in a relay card frame (1) by a relay card slot (3), and two
A relay card frame (1) adjacent wall links together, and keeps two relay card frame (1) connections integral；
The structure of four relay cards (2) is all the same, each relay card (2) include RS232 programming configuration interface (7), after
Electric appliance card controller mainboard (8), relay card relay board (9), controller (11) and solid-state relay (12),
RS232 programming configuration interface (7) is provided on the front panel of each relay card (2), external equipment is compiled by the RS232
Journey configuration interface (7) to relay card (2) Input Software programming in logic configuration,
A controller (11) is provided on each relay card controller mainboard (8), each controller (11) is for receiving 11
A big chaser signal of axis vibration and 22 big alarm signals of axis vibration, and it is big to the big chaser signal of 11 axis of input vibration and 22 axis vibrations
Alarm signal is handled according to software logic programming configuration, output driving instruction,
And received 11 axis of two controllers (11) in each relay card frame (1) shake big chaser signal type not
Together,
It is provided on relay card relay board (9) solid-state relay (12), solid-state relay (12) is for receiving controller
(11) driving instruction issued, so that the instruction of controller output is completed in actuating of relay output.
2. the big protection signal interface unit of turbine shaft vibration according to claim 1, which is characterized in that each relay card
It (2) further include a relay card signal connector (10),
The back of each relay card frame (1) is embedded with two group relay card slot connectors (5),
Each relay card controller mainboard (8) and each relay card relay board (9) respectively pass through a relay card signal
Connector (10) is inserted into a relay card slot connector (5).
3. the big protection signal interface unit of turbine shaft vibration according to claim 2, which is characterized in that
Each relay card frame (1) further includes that relay card installation slideway (4) and shared output signal terminal arrange (6),
Relay card installation slideway (4) there are two being respectively set on the inner top surface and inner bottom surface of each relay card frame (1), often
A relay card on each relay card frame (1) inner top surface installs slideway (4) and interior bottom to a relay card (2) respectively
On face a relay card installation slideway (4) be inserted into a relay card slot (3), make each relay card (2) with
The connection of one group relay card slot connector (5)；
The instruction of the controller output is by sharing output signal terminal row (6) output.
4. the big protection signal interface unit of turbine shaft vibration according to claim 1, which is characterized in that each relay card
It (2) further include that relay card output channel LED light (13), controller state LED light (14) and power supply status LED refer to
Show lamp (15),
Relay card output channel LED light (13), controller state LED light (14) and power supply status LED light
(15) it is arranged on the front panel of relay card (2),
Relay card output channel LED light (13), for showing the working condition of solid-state relay (12),
Controller state LED light (14), for showing the working condition of relay card controller mainboard (8),
Power supply status LED light (15), for showing the switch state of power supply.
5. the big protection signal interface unit of turbine shaft vibration according to claim 4, which is characterized in that each relay card
(2) solid-state relay (12) on has 16, and relay card output channel LED light (13) is 16, each relay card
Output channel LED light (13) is used to show the working condition of a solid-state relay (12).
6. the big protection signal interface unit of turbine shaft vibration according to claim 1, which is characterized in that each relay card
It (2) further include relay card installation handle (16),
Relay card is installed handle (16) and is arranged on the front panel of a relay card (2),
Relay card is installed handle (16) and is installed convenient for the plug to relay card (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811467800.9A CN109782637B (en) | 2018-12-03 | 2018-12-03 | Large protection signal interface device for shaft vibration of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811467800.9A CN109782637B (en) | 2018-12-03 | 2018-12-03 | Large protection signal interface device for shaft vibration of steam turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109782637A true CN109782637A (en) | 2019-05-21 |
| CN109782637B CN109782637B (en) | 2021-08-17 |
Family
ID=66496416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811467800.9A Active CN109782637B (en) | 2018-12-03 | 2018-12-03 | Large protection signal interface device for shaft vibration of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109782637B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59196909A (en) * | 1983-03-16 | 1984-11-08 | シーメンス、アクチェンゲゼルシャフト | Protective system of turbo machine |
| JP2000244369A (en) * | 1999-02-18 | 2000-09-08 | Fujitsu Ltd | Transmitter |
| CN101135894A (en) * | 2007-09-30 | 2008-03-05 | 江阴众和电力仪表有限公司 | Built-in rotating machinery operation monitoring protecting equipment and setting method thereof |
| CN201717594U (en) * | 2010-07-13 | 2011-01-19 | 北京国电智深控制技术有限公司 | Safety protection device of controlled system and system thereof |
| CN202257243U (en) * | 2011-09-28 | 2012-05-30 | 德阳瑞能电力科技有限公司 | Miniature steamer distributed centralized control system |
| CN202916601U (en) * | 2012-10-22 | 2013-05-01 | 北京派利斯科技有限公司 | Redundant relay module |
| CN103628933A (en) * | 2013-12-02 | 2014-03-12 | 成都成发科能动力工程有限公司 | Control method for realizing ETS (emergency trip system) function of small-sized steam turbine set |
| CN204332831U (en) * | 2014-12-18 | 2015-05-13 | 阿尔特汽车技术股份有限公司 | The relay box of modified node method |
| CN205895327U (en) * | 2016-08-02 | 2017-01-18 | 中国神华能源股份有限公司 | Steam turbine shaft monitoring device that shakes |
| CN107084843A (en) * | 2017-06-22 | 2017-08-22 | 北京振测智控科技有限公司 | A kind of shaft vibration monitoring method and device |
-
2018
- 2018-12-03 CN CN201811467800.9A patent/CN109782637B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59196909A (en) * | 1983-03-16 | 1984-11-08 | シーメンス、アクチェンゲゼルシャフト | Protective system of turbo machine |
| JP2000244369A (en) * | 1999-02-18 | 2000-09-08 | Fujitsu Ltd | Transmitter |
| CN101135894A (en) * | 2007-09-30 | 2008-03-05 | 江阴众和电力仪表有限公司 | Built-in rotating machinery operation monitoring protecting equipment and setting method thereof |
| CN201717594U (en) * | 2010-07-13 | 2011-01-19 | 北京国电智深控制技术有限公司 | Safety protection device of controlled system and system thereof |
| CN202257243U (en) * | 2011-09-28 | 2012-05-30 | 德阳瑞能电力科技有限公司 | Miniature steamer distributed centralized control system |
| CN202916601U (en) * | 2012-10-22 | 2013-05-01 | 北京派利斯科技有限公司 | Redundant relay module |
| CN103628933A (en) * | 2013-12-02 | 2014-03-12 | 成都成发科能动力工程有限公司 | Control method for realizing ETS (emergency trip system) function of small-sized steam turbine set |
| CN204332831U (en) * | 2014-12-18 | 2015-05-13 | 阿尔特汽车技术股份有限公司 | The relay box of modified node method |
| CN205895327U (en) * | 2016-08-02 | 2017-01-18 | 中国神华能源股份有限公司 | Steam turbine shaft monitoring device that shakes |
| CN107084843A (en) * | 2017-06-22 | 2017-08-22 | 北京振测智控科技有限公司 | A kind of shaft vibration monitoring method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109782637B (en) | 2021-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100533315C (en) | Safety controller | |
| ES2321672T3 (en) | ELECTRICAL INTERRUPTION DEVICE THAT INCLUDES A COMMUNICATION MODULE. | |
| CN101326472B (en) | On-site electric apparatus and method for establishing data connection between data interface and data memory of the locale electric apparatus | |
| CN205945239U (en) | Overload protection device and system | |
| CN101322209B (en) | Method for monitoring protection apparatus connected on upriver part of switch apparatus | |
| CN109782637A (en) | The big protection signal interface unit of turbine shaft vibration | |
| CN201066769Y (en) | Plane power management system | |
| CN213270131U (en) | Become oar system safety interlock | |
| CN101667807B (en) | Motor control method based on DCS system | |
| CN201886342U (en) | Intelligent secondary station capable of realizing programmable logic controller (PLC) system fault monitoring and display | |
| US20150180226A1 (en) | Multispur fieldbus isolator arrangement | |
| CN203444293U (en) | Triplex-level-redundancy emergency shut-down device | |
| CN208955743U (en) | A kind of automatic transfer switch controller and its functional module | |
| CN104838735B (en) | Input module with self-supporting connection | |
| WO2021093570A1 (en) | Power supply switching control system and power supply switching control method | |
| CN205594406U (en) | A safety monitoring device for distributed control system of thermal power plant rack | |
| CN209746044U (en) | Urban power grid health online monitoring device based on optical fiber wireless fusion | |
| CN202888022U (en) | Rotary switch with indicating lamp | |
| CN209526562U (en) | Distributed DTU device | |
| CN202870519U (en) | Special-purpose controller for electronic dobby | |
| CN208060970U (en) | A kind of guest-room controller based on redundancy structure | |
| CN207233192U (en) | Intelligent access controller based on wireless network | |
| CN110865915A (en) | Maintenance and debugging device for ticket selling and checking equipment | |
| CN101477922B (en) | Motherboard electric connection construction for controlling protection electric appliance | |
| CN220566174U (en) | Hydraulic machinery protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230309 Address after: 150000 building 3, high tech production base, Nangang District, Harbin City, Heilongjiang Province Patentee after: HARBIN TURBINE Co.,Ltd. Patentee after: HADIAN POWER EQUIPMENT NATIONAL ENGINEERING RESEARCH CENTER CO.,LTD. Address before: 150046 No. three power road 345, Xiangfang District, Heilongjiang, Harbin Patentee before: HARBIN TURBINE Co.,Ltd. |