CN209728452U - A kind of boiler water circulating pump protective system in heat power device - Google Patents
A kind of boiler water circulating pump protective system in heat power device Download PDFInfo
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- CN209728452U CN209728452U CN201920651287.2U CN201920651287U CN209728452U CN 209728452 U CN209728452 U CN 209728452U CN 201920651287 U CN201920651287 U CN 201920651287U CN 209728452 U CN209728452 U CN 209728452U
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Abstract
The utility model discloses a kind of boiler water circulating pump protective system in heat power devices; including host computer a and host computer b; the host computer a and host computer b are connect with LANa and LANb two-way signaling respectively; the LANa and LANb is also connect with DPUa and DPUb two-way signaling respectively; two-way electric connection (being mutually redundant) between the DPUa and DPUb; also two-way signaling is connect the DPUa between DO card, DI card, AI card and RTD card respectively, and DCS system includes above mentioned equipment；After replacement, signal is directly entered DCS system, processing and Logical Configuration are carried out to signal, make signal acquisition and processing speed faster, it is safer, the needs of high capacity high parameter unit allocation are adapted to, and after improving, the safety of system greatly improves, the every malfunction in four months that is averaged of original boiler water circulating pump is primary, it is reduced to operation time more than 2 years at present, never generation malfunction or misaction, simultaneously, it is also brought conveniently to operations staff's monitoring, reduces the maintenance of service personnel, improve labor efficiency.
Description
Technical field
The utility model belongs to thermal power plant boiler water circulating pump technical field, and in particular to a kind of boiler water circulating pump thermal technology
Protective device.
Background technique
In the water circulation system of forced circulation boiler, the status of boiler water circulating pump is equivalent to " heart " in human body
Position.This system has three boiler water circulating pumps, under normal circumstances two operations, and one spare, if a boiler water circulating pump malfunction
And stand-by pump is unable to chain promoter, then unit will get rid of a halfload；If two furnaces follow tripping and stand-by pump is unable to chain promoter,
MFT, shutdown, blowing out will be caused, measuring instrumentss performance used in the guarantee device of this equipment is unreliable, measurement accuracy is not high,
The protection signal of offer is unreliable, easily leads to signal accidentally hair or tripping, causes boiler water circulating pump malfunction or tripping, influence unit
Safe and stable operation, there is also the high disadvantages of maintenance, maintenance cost.
Utility model content
The purpose of this utility model is to provide a kind of boiler water circulating pump protective system in heat power devices, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the utility model provides the following technical solutions:
A kind of boiler water circulating pump protective system in heat power device, including host computer a and host computer b, the host computer a and host computer b
It is connect respectively with LANa and LANb two-way signaling, the LANa and LANb are also connect with DPUa and DPUb two-way signaling respectively, institute
State two-way electric connection between DPUa and DPUb, the DPUa also two-way letter between DO card, DI card, AI card and RTD card respectively
Number connection, the AI card also acquire differential pressure transmitter 4-20mA current signal, and it is electric that the RTD card also acquires resistance thermometer clement 1-5V
Signal is pressed, LANa with the LANb two-way signaling connects.
Preferably, the DPUa is main DPU, and the DPUb is auxiliary DPU.
Preferably, the DO fixture body is output switch parameter module, and the DI fixture body is On-off signal module, described
AI fixture body is analog input module, and the RTD fixture body is thermal resistor inputting modular unit.
Preferably, the model of the resistance thermometer clement is specifically as follows PT-100.
Preferably, the differential pressure transporting implement body uses range for the 3051 high pressure-resistant differential pressure transmitters of 0-32MP.
Preferably, the protective device further includes two redundancy 24VDC power supply boxs and a redundancy 48VDC power supply box.
Compared with prior art, the utility model has the beneficial effects that
After replacement, signal is directly entered DCS system, carries out processing and Logical Configuration to signal, makes acquisition and the place of signal
Manage speed faster, it is safer, adapted to the needs of high capacity high parameter unit allocation, and after improving, the safety of system is significantly
It improves, the every malfunction in four months that be averaged of original boiler water circulating pump is primary, it is reduced to and runs the time more than 2 years at present, never miss
Dynamic or misaction, meanwhile, it is also brought conveniently to operations staff's monitoring, reduces the maintenance of service personnel, improve labor
Efficiency of movement, if directly or indirectly loss presses 20 since boiler water circulating pump protection system malfunction causes No. 5 units to open, it is primary to stop
Wan Yuan；If protective device tripping causes a boiler water circulating pump motor damage to calculate by 700,000 yuan, up to the present, equipment
After improvement for factory's bring economic benefit be considerable.
Detailed description of the invention
Fig. 1 is boiler water circulating pump protective device hardware structural diagram after the utility model improves；
Fig. 2 is boiler water circulating pump protective device logic chart after the utility model improves；
In figure: 1, host computer a；2, host computer b；3,DPUa；4,DPUb；5, DO card；6, DI card；7, AI card；8, RTD card；
9, differential pressure transmitter；10, resistance thermometer clement；11,LANa；12,LANb.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model provides a kind of technical solution referring to FIG. 1-2: a kind of boiler water circulating pump protective system in heat power device, packet
Host computer a1 and host computer b2 are included, host computer a1 and host computer b2 are connect with LANa (11) and LANb (12) two-way signaling respectively,
LANa (11) and LANb (12) are also connect with DPUa3 and DPUb4 two-way signaling respectively, and two-way electrical property connects between DPUa3 and DPUb4
It connects, also two-way signaling is connect DPUa3 between DO card 5, DI card 6, AI card 7 and RTD card 8 respectively, and AI card 7 also acquires differential pressure transporting
The current signal of device 9, RTD card 8 also acquire the voltage signal of resistance thermometer clement 10, two-way letter between LANa (11) and LANb (12)
Number connection.
In the present embodiment, increase-volume is carried out to former DCS system, increase host computer a1 and host computer b2, DPUa3 and DPUb4,
Two redundancy LAN, two redundancy 24VDC power supply boxs, a redundancy 48VDC power supply box and corresponding AI card 7 and RTD card 8 etc.,
By original boiler water circulating pump, thermal measurement and protective device cabinet are removed on the spot, then ground motor temperature table is changed to PT-100 type heat
Resistive element 10, differential pressure transmitter 9 is changed to the 3051 high pressure-resistant differential pressure transmitters that range is 0-32MP, because of measuring point after improvement
Signal is directly entered DCS system and carries out data processing and programming, and since DCS system capacity increases, data processing speed ratio with
It is preceding it is fast, boiler water circulating pump defencive function is relatively reliable, boiler water circulating pump differential pressure signal and motor temperature signal are shown on picture,
Furnace is indicated at this time when detecting boiler water circulating pump differential pressure signal greater than 0.11MPa through differential pressure transmitter 9 convenient for operations staff's monitoring
Water-circulating pump differential pressure is normal, and one of condition of pump is opened in completion, detects boiler water circulating pump differential pressure signal through differential pressure transmitter 9 and is less than
When 0.06MPa, indicates that boiler water circulating pump differential pressure is low at this time, on the other hand detected through resistance thermometer clement 10 to jump one of pump condition
When boiler water circulating pump motor temperature signal is greater than 60 DEG C, indicate that boiler water circulating pump motor temperature is high at this time, also for jump pump condition it
One.
Further, DPUa3 is main DPU, and DPUb4 is auxiliary DPU.
Further, DO card 5 is specially output switch parameter module, and DI card 6 is specially On-off signal module, and AI card 7 has
Body is analog input module, and RTD card 8 is specially thermal resistor inputting modular unit.
Further, the model of resistance thermometer clement 10 is specifically as follows PT-100, and precision is higher, and detection model is preferable.
Further, differential pressure transmitter 9 specifically uses range for the 3051 high pressure-resistant differential pressure transmitters of 0-32MP, has
Good high voltage performance, and range improves, and surveys pressure accuracy and further increases.
Further, protective device further includes two redundancy 24VDC power supply boxs and a redundancy 48VDC power supply box.
The working principle and process for using of the utility model:
Increase-volume is carried out to former DCS system, increase host computer a1 and host computer b2, DPUa3 and DPUb4, LANa11 and
LANb12, two redundancy 24VDC power supply boxs, a redundancy 48VDC power supply box and corresponding AI card 7 and RTD card 8 etc., will be former
Some boiler water circulating pumps on the spot remove by thermal measurement and protective device cabinet, then ground motor temperature table is changed to PT-100 type thermal resistance
Element 10, differential pressure transmitter 9 is changed to the 3051 high pressure-resistant differential pressure transmitters that range is 0-32MP, because of measuring point signal after improvement
Be directly entered DCS system and carry out data processing and programming, and since DCS system capacity increases, data processing speed than it is fast in the past,
Boiler water circulating pump defencive function is relatively reliable, and boiler water circulating pump differential pressure signal and motor temperature signal are shown on picture, is convenient for
Operations staff's monitoring, measured signal is directly entered DCS system, then carries out data processing and programming to signal, realizes defencive function,
To guarantee boiler water circulating pump safe and stable operation.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of boiler water circulating pump protective system in heat power device, including host computer a (1) and host computer b (2), it is characterised in that: on described
Position machine a (1) and host computer b (2) are connect with LANa (11) and LANb (12) two-way signaling respectively, the LANa (11) and LANb
(12) it is also connect respectively with DPUa (3) and DPUb (4) two-way signaling, two-way electric connection between the DPUa (3) and DPUb (4)
It is mutually redundant, also two-way signaling connects the DPUa (3) between DO card (5), DI card (6), AI card (7) and RTD card (8) respectively
It connects, the AI card (7) also acquires differential pressure transmitter (9) 4-20mA current signal, and the RTD card (8) also acquires resistance thermometer clement
(10) 1-5V voltage signal, the LANa (11) connect with LANb (12) two-way signaling.
2. boiler water circulating pump protective system in heat power device according to claim 1, it is characterised in that: based on the DPUa (3)
DPU, the DPUb (4) are auxiliary DPU.
3. boiler water circulating pump protective system in heat power device according to claim 1, it is characterised in that: the DO card (5) is specially
Output switch parameter module, the DI card (6) is specially On-off signal module, and the AI card (7) is specially analog input mould
Part, the RTD card (8) is specially thermal resistor inputting modular unit.
4. boiler water circulating pump protective system in heat power device according to claim 1, it is characterised in that: the resistance thermometer clement (10)
Model be specifically as follows PT-100.
5. boiler water circulating pump protective system in heat power device according to claim 1, it is characterised in that: the differential pressure transmitter (9)
Specifically use range for the 3051 high pressure-resistant differential pressure transmitters of 0-32MP.
6. boiler water circulating pump protective system in heat power device according to claim 1, it is characterised in that: the protective device further includes
Two redundancy 24VDC power supply boxs and a redundancy 48VDC power supply box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920651287.2U CN209728452U (en) | 2019-05-08 | 2019-05-08 | A kind of boiler water circulating pump protective system in heat power device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920651287.2U CN209728452U (en) | 2019-05-08 | 2019-05-08 | A kind of boiler water circulating pump protective system in heat power device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209728452U true CN209728452U (en) | 2019-12-03 |
Family
ID=68674298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920651287.2U Active CN209728452U (en) | 2019-05-08 | 2019-05-08 | A kind of boiler water circulating pump protective system in heat power device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209728452U (en) |
-
2019
- 2019-05-08 CN CN201920651287.2U patent/CN209728452U/en active Active
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