CN207180946U - A kind of thermal power plant height bypass valve leaks early warning detecting system - Google Patents
A kind of thermal power plant height bypass valve leaks early warning detecting system Download PDFInfo
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- CN207180946U CN207180946U CN201721223866.4U CN201721223866U CN207180946U CN 207180946 U CN207180946 U CN 207180946U CN 201721223866 U CN201721223866 U CN 201721223866U CN 207180946 U CN207180946 U CN 207180946U
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- bypass valve
- temperature
- power plant
- thermal power
- jet chimney
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Abstract
The utility model discloses a kind of thermal power plant height bypass valve leakage early warning detecting system, mixed after being included in each high side valve at temperature section jet chimney 300mm and 1000mm, 2 tube wall temperature measuring cells are arranged in pairs respectively, the temperature element is connected to DCS control devices by compensating cable, shown on the DCS operator station positioned at central station of floating dock, overtemperature alarm, prompt interior leak.When avoiding leaking in unit bypass valve using the utility model, when desuperheating water is also opened, operations staff can not judge, cause steam largely to waste, while avoid the potential safety hazard that pipeline is chronically at overtemperature state；Thermometric original paper uses common double Zhi Biwen thermocouples, and cost is low, replacing is convenient.
Description
Technical field
The utility model belongs to thermal power plant control system field, is related to a kind of thermal power plant height bypass valve leakage
Warning monitoring system.
Background technology
Thermal power plant is provided with that height is other, low collateral line system, and the interior leakage of bypass valve is each thermal power plant's generally existing but is difficult
One problem of detection, the country lack effective and safety, quick on-line monitoring.It is conventional to utilize portable valve
Inner hexagon instrument is detected, but portable valves leakage detector can not monitor in real time, it is impossible to give warning in advance, hardly possible find compared with
A small amount of interior leakages.Therefore, it is necessary to a kind of reliable, easy to use detection scheme is designed, to leaking into row in high and low bypass valve
On-line monitoring, early warning is carried out when there are a small amount of interior leakages, avoid leakage in bypass valve from causing vapour losses, waste the energy；Avoid
Jet chimney is chronically at the potential safety hazard of overtemperature state, reduces security risk.
Utility model content
To solve the defects of prior art is present, the utility model purpose is that providing a kind of thermal power plant height bypasses
Valve leaks warning monitoring system, interior leakage Times can occurs to leaking into capable on-line monitoring in the high side valve in thermal power plant, low side valve
It is alert.
To reach above-mentioned purpose, the utility model, which adopts the following technical scheme that, to be achieved：
A kind of thermal power plant height bypass valve leaks early warning detecting system, including several temperature elements, temperature element
It is separately mounted on the mixed temperature section jet chimney after other thermal power plant height, low collateral line system high pressure bypass valve and low voltage bypass valve,
Temperature element is connected with thermal power plant DCS control devices；
Two groups of temperature elements are respectively set on high other, the low mixed temperature section jet chimney of collateral line system, every two temperature elements are one group,
Two temperature elements are mixed on the same cross section of temperature section steam pipework after being installed on valve, first group of temperature element and second group of thermometric member
Part is mixed at temperature section jet chimney 300mm and at 1000mm after being respectively arranged in high pressure bypass valve or low voltage bypass valve.
Further, when mixing temperature section jet chimney after high pressure bypass valve or low voltage bypass valve and being arranged vertically, every group of two surveys
Warm element is arranged on pipeline same level absolute altitude, and a temperature element is located in the side wall of pipeline and steam inlet direction homonymy,
Another is arranged symmetrically in pipeline offside side wall；It is horizontally disposed that temperature section jet chimney is mixed after high pressure bypass valve or low voltage bypass valve
When, every group of two elements are separately mounted to the tube top of same place conduit section, ttom of pipe position.
Further, thermal power plant central station of floating dock is provided with DCS operator station, and DCS control devices connect with DCS operator station
Connect.
Further, temperature element is using K indexing armored wall warm galvanic couples.
Further, temperature element is by being welded on the collection mixed after high pressure bypass valve or low voltage bypass valve on temperature section jet chimney
Hot block is in contact with jet chimney, and jet chimney tube wall temperature is measured.
Further, temperature element carries terminal box, and terminal box is connected by compensating cable with DCS control devices.Relative to
Prior art, the utility model also have the advantages that：
(1) the utility model is applied to the inner hexagon of the high and low bypass valve of all thermal power plants, economical, reliable, effective solution
Portable valves leakage detector of having determined can not monitor in real time, it is impossible to gives warning in advance, difficult the problem of finding small amount of interior leakage.
(2) the utility model whether interior to high and low side valve road can leak into row by the wall temperature measurement point after increasing height bypass
Judge and alarm, improve security of system, reduce energy waste.
Brief description of the drawings
Fig. 1 is Tthe utility model system schematic diagram
In figure：1- high pressure bypass valves, 2- low voltage bypasses valve, 3- temperature elements, 4- compensating cables, 5-DCS control devices, 6-
DCS operator station.
Embodiment
With reference to the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu, complete description, embodiment described herein is only part of the embodiment of the present utility model, and not all implementation
Example.Based on the embodiment in the utility model, what those of ordinary skill in the art were obtained under the premise of no creative work
Every other embodiment, belongs to scope of protection of the utility model.
Steam before high and low bypass valve is high temperature and high pressure steam, and this two classes valve latus rectum is big, once leaked in occurring,
A large amount of steam can be caused to be lost in, cause substantial amounts of economic loss.Meanwhile cold section is not directly discharged into it by the steam of pressure and temperature reducing
Or condenser, serious damage can be caused to equipment, brings great potential safety hazard.
By large scale business CFD software FLUENT, 1 has been carried out to the pipeline after the high side valve of multiple engineerings：1 numeral is built
Mould, and compare after the high side valve in the case of following three kinds thermo parameters method in jet chimney：
(1) when high side valve is closed；
(2) high side valve door has leakage；
(3) high side valve door has leakage, while when spraying into desuperheating water.
Analysis result is as follows：
(1) when high side valve completely closes, the fluid temperature (F.T.) when pipeline wall temperature after high side valve is cold section of operation；
(2) when high side valve has leakage, pipeline wall temperature of the pipeline wall temperature apparently higher than temperature mixing after uniform after high side valve,
But apparently higher than cold section of fluid temperature (F.T.)；
(3) high side valve door has leakage, while when spraying into desuperheating water, the pipeline wall temperature after high side valve is uniform higher than temperature mixing
Pipeline wall temperature afterwards, the pipeline wall temperature after temperature mixing is uniform are cold section of fluid temperature (F.T.)；
(4) when interior leak occurs in valve, there is obvious rise in 200mm, 300mm position after valve, tube wall temperature.
Consider 200mm, 300mm close proximity after high side valve, it is also close from valve interface, optimize point layout, final choosing
Select and mixed after high and low bypass valve at temperature section jet chimney 300mm, set 2 tube wall temperature thermocouples to be detected, and after valve
1000mm position (the well mixed place of steam) sets a pair of tube wall temperature thermocouples to further confirm that again, it was demonstrated that valve leaks shape
Condition is true and reliable, reminds operating maintenance personnel's timely processing, the further expansion of failure is avoided, so as to reach the mesh of energy-conservation
's.
Specific implementation step refers to accompanying drawing 1, a kind of thermal power plant height bypass valve leakage early warning of the utility model
Monitoring scheme, temperature section jet chimney is mixed after every high side valve 2 groups of temperature elements 3 are set, temperature element 3 is using K indexing armourings
Wall temperature thermocouple, every two temperature elements 3 are one group, and two temperature elements 3 mix the same horizontal stroke of temperature section steam pipework after being installed on valve
On section.
First group of wall temperature thermocouple is arranged on after high side valve exports at 300mm, and it is same that 2 wall temperature thermocouples are arranged in pipeline
On cross section, particular location is as follows when device context is installed：When pipeline uses vertical disposition, each pair wall temperature thermocouple should
Installed in pipeline same level absolute altitude, steam inlet direction and it is arranged symmetrically on the opposite sides；When pipeline uses horizontal arranging mode, often
Tube top, the ttom of pipe position of same place conduit section should be arranged on to wall temperature thermocouple；Second group of thermocouple is arranged on high side valve and gone out
After mouthful at 1000mm, the concrete arrangement of wall temperature thermocouple is identical with first group of principle.Low side valve rear wall warm galvanic couple
Quantity and arrangement principle are identical with after high side valve.
Temperature element 3 is by being welded on the heat-collecting block mixed after high pressure bypass valve 1 or low voltage bypass valve 2 on temperature section jet chimney
It is in contact with jet chimney, jet chimney tube wall temperature is measured；Temperature element 3 carries terminal box, and terminal box passes through benefit
Repay cable and be connected wall temperature thermocouple with DCS control devices 5 by compensating wire access DCS control devices, on DCS operator station
Display, overtemperature alarm, overtemperature alarm prompt high side valve or low side valve to have leakage.
Above example is merely to illustrate the technical solution of the utility model rather than its limitations, although with reference to above-mentioned implementation
The utility model is described in detail example, and those of ordinary skill in the art still can be to of the present utility model specific
Embodiment is modified or equivalent substitution, and these without departing from the spirit and scope of the utility model any modification or
Equivalent substitution, it is within claims of the present utility model.
Claims (6)
1. a kind of thermal power plant height bypass valve leaks early warning detecting system, it is characterised in that：Including several temperature elements
(3), temperature element (3) is separately mounted to other thermal power plant height, low collateral line system high pressure bypass valve (1) and low voltage bypass valve (2)
On mixed temperature section jet chimney afterwards, temperature element is connected with thermal power plant DCS control devices (5)；
Two groups of temperature elements (3) are respectively set on high other, the low mixed temperature section jet chimney of collateral line system, every two temperature elements (3) are one
Group, two temperature elements (3) are installed on after valve and mixed on the same cross section of temperature section steam pipework, first group of temperature element and second group
Temperature element is respectively arranged in high pressure bypass valve (1) or low voltage bypass valve (2) and mixed afterwards at temperature section jet chimney 300mm and 1000mm
Place.
A kind of 2. thermal power plant height bypass valve leakage early warning detecting system according to claim 1, it is characterised in that：
When high pressure bypass valve (1) or low voltage bypass valve (2) mix temperature section jet chimney afterwards and are arranged vertically, every group of two temperature elements (3)
Installed in pipeline same level absolute altitude, a temperature element (3) is located in the side wall of pipeline and steam inlet direction homonymy, another
Only it is arranged symmetrically in pipeline offside side wall；High pressure bypass valve (1) or low voltage bypass valve (2) mix the horizontal cloth of temperature section jet chimney afterwards
When putting, every group of two elements (3) are separately mounted to the tube top of same place conduit section, ttom of pipe position.
3. a kind of thermal power plant height bypass valve leakage early warning detecting system according to claim 1 or 2, its feature exist
In：Thermal power plant central station of floating dock is provided with DCS operator station (6), and DCS control devices (5) are connected with DCS operator station (6).
4. a kind of thermal power plant height bypass valve leakage early warning detecting system according to claim 1 or 2, its feature exist
In：Temperature element (3) is using K indexing armored wall warm galvanic couples.
A kind of 5. thermal power plant height bypass valve leakage early warning detecting system according to claim 4, it is characterised in that：
Temperature element (3) by be welded on high pressure bypass valve (1) or low voltage bypass valve (2) mix afterwards heat-collecting block on temperature section jet chimney with
Jet chimney is in contact, and jet chimney tube wall temperature is measured.
A kind of 6. thermal power plant height bypass valve leakage early warning detecting system according to claim 4, it is characterised in that：
Temperature element (3) carries terminal box, and terminal box is connected by compensating cable with DCS control devices (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721223866.4U CN207180946U (en) | 2017-09-22 | 2017-09-22 | A kind of thermal power plant height bypass valve leaks early warning detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721223866.4U CN207180946U (en) | 2017-09-22 | 2017-09-22 | A kind of thermal power plant height bypass valve leaks early warning detecting system |
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| Publication Number | Publication Date |
|---|---|
| CN207180946U true CN207180946U (en) | 2018-04-03 |
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ID=61749066
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721223866.4U Active CN207180946U (en) | 2017-09-22 | 2017-09-22 | A kind of thermal power plant height bypass valve leaks early warning detecting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608858A (en) * | 2019-09-04 | 2019-12-24 | 魏丽蓉 | Method for testing steam internal leakage of low-pressure bypass valve of thermal generator set |
| CN113409969A (en) * | 2021-02-05 | 2021-09-17 | 海南核电有限公司 | Nuclear power plant valve internal leakage fault diagnosis method |
-
2017
- 2017-09-22 CN CN201721223866.4U patent/CN207180946U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608858A (en) * | 2019-09-04 | 2019-12-24 | 魏丽蓉 | Method for testing steam internal leakage of low-pressure bypass valve of thermal generator set |
| CN110608858B (en) * | 2019-09-04 | 2021-07-30 | 魏丽蓉 | Method for testing steam internal leakage of low-pressure bypass valve of thermal generator set |
| CN113409969A (en) * | 2021-02-05 | 2021-09-17 | 海南核电有限公司 | Nuclear power plant valve internal leakage fault diagnosis method |
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