CN209876895U - Water injection system for cavity of forced circulation pump of boiler - Google Patents
Water injection system for cavity of forced circulation pump of boiler Download PDFInfo
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- CN209876895U CN209876895U CN201920348322.3U CN201920348322U CN209876895U CN 209876895 U CN209876895 U CN 209876895U CN 201920348322 U CN201920348322 U CN 201920348322U CN 209876895 U CN209876895 U CN 209876895U
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Abstract
The utility model relates to a boiler forced circulation pump cavity water injection system, including filling water module and supplementary water injection module, fill the water module and include high-pressure water filling pipeline, high-pressure water filling pipeline's output falls into two the tunnel and links to each other with boiler circulation pump's cavity and cooler respectively, supplementary water injection module includes two water injection pipelines that connect in parallel each other, water injection pipeline's input links to each other with the salt-free water source, output and high-pressure water filling pipeline after two water injection pipeline confluence link to each other and the tie point is located between normally closed valve two and the normally open valve, water injection pipeline is equipped with normally closed valve three by input to output in proper order, the water injection pump, motorised valve and check valve. The utility model discloses improve present water system that fills, guaranteed the pressure of the interior motor cooling water of boiler forced circulation pump chamber to the relatively poor stove water of quality gets into the condition of incident such as generator electricity leakage in the cavity in the debugging link of unit operation initial stage such as when having avoided installation, pickling and blowpipe, has guaranteed the safe operation of circulating pump.
Description
Technical Field
The utility model relates to a boiler water circulating system technical field especially relates to a boiler forced circulation pump cavity water injection system.
Background
At present, the boiler water circulating pump is widely used in a power station boiler, equipment manufacturers mainly aim at designing how to protect the boiler water circulating pump in the running process of a unit, and the boiler water circulating pump at the initial stage of unit installation and commissioning is not designed in a targeted manner. In the debugging links of the unit operation initial stage such as during installation, pickling and blowpipe, the quality of stove water is relatively poor, contains a large amount of ions for example in the stove water during boiler pickling, if the stove water leaks into stove water circulating pump indoor, thereby has increased the electric conductive property of the interior motor cooling water of cavity and arouse accident such as motor electric leakage easily, influences the safe operation of circulating pump.
Disclosure of Invention
The utility model aims at solving the defects of the prior art and provides a water injection system for a boiler forced circulation pump cavity.
The utility model discloses a realize above-mentioned purpose, adopt following technical scheme:
a water injection system for a cavity of a forced circulation pump of a boiler comprises a water filling module and an auxiliary water injection module, wherein the water filling module comprises a high-pressure water filling pipeline, the high-pressure water filling pipeline is sequentially provided with a normally-closed valve I, a spring check valve I, a normally-closed valve II, a normally-opened valve I and a spring check valve II from an input end to an output end, the output end of the high-pressure water filling pipeline is divided into two paths and is respectively connected with the cavity of the boiler circulation pump and a cooler, a pressure detection branch is arranged between the normally-closed valve II and the normally-opened valve, the end part of the branch is provided with a pressure gauge,
the supplementary water injection module includes two water injection pipeline that connect in parallel each other, and water injection pipeline's input links to each other with the salt-free water source, and output after two water injection pipeline confluence links to each other with high-pressure water injection pipeline and the tie point is located between normally closed valve two and the normally open valve, and water injection pipeline is equipped with normally closed valve three, water injection pump, motorised valve and check valve one by input to output in proper order.
Preferably, the auxiliary water injection module is provided with two sets of power supplies which are mutually standby.
Preferably, the high-pressure water filling pipeline is located the second output end of the spring check valve and is provided with a first hydrophobic sewage draining branch, the first hydrophobic sewage draining branch is connected with a first hydrophobic pipe, and the first hydrophobic sewage draining branch is provided with a normally-closed valve four and a normally-closed valve five.
Preferably, the high-pressure water filling pipeline is located and is equipped with normally closed valve six between spring check valve one and the normally closed valve two, and the high-pressure water filling pipeline is located and is equipped with the hydrophobic blowdown branch road of second between normally closed valve six and the normally closed valve two, and the hydrophobic blowdown branch road of second links to each other with the hydrophobic pipe of second, is equipped with normally closed valve seven on the hydrophobic blowdown branch road of second.
Preferably, the water injection pipeline is connected in parallel with a water injection bypass, and a normally closed valve eight and a check valve two are sequentially arranged on the water injection bypass from the input end to the output end.
The utility model has the advantages that: the utility model discloses improve present water system that fills, guaranteed the pressure of the interior motor cooling water of boiler forced circulation pump chamber to the relatively poor stove water of quality gets into the condition of incident such as generator electricity leakage in the cavity in the debugging link of unit operation initial stage such as when having avoided installation, pickling and blowpipe, has guaranteed the safe operation of circulating pump.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1-a high-pressure water filling pipeline; 2-normally closed valve one; 3-a spring check valve I; 4-normally closed valve two; 5-normally open valve one; 6-spring check valve II; 7-a chamber; 8-a cooler; 9-normally open valve two; 10-normally open valve III; 11-pressure gauge; 12-normally closed valve four; 13-normally closed valve five; 14-a first hydrophobic tube; 15-normally closed valve six; 16-normally closed valve seven; 17-a second hydrophobic tube; 18-normally closed valve three; 19-a water injection pump; 20-an electric valve; 21-a check valve I; 22-normally closed valve eight; 23-a check valve II;
the following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.
Detailed Description
The invention will be further explained with reference to the following figures and examples:
as shown in the figure, the water injection system for the cavity of the forced circulation pump of the boiler comprises a water filling module and an auxiliary water injection module, wherein the water filling module comprises a high-pressure water filling pipeline 1, the high-pressure water filling pipeline 1 is sequentially provided with a first normally-closed valve 2, a first spring check valve 3, a second normally-closed valve 4, a first normally-opened valve 5 and a second spring check valve 6 from an input end to an output end, the output end of the high-pressure water filling pipeline 1 is divided into two paths and is respectively connected with the cavity 7 and a cooler 8 of the boiler circulation pump, a pressure detection branch is arranged between the second normally-closed valve 4 and the normally-opened valve 5 in the high-pressure water filling pipeline 1, the end part of,
the supplementary water injection module includes two water injection pipelines that connect in parallel each other, and water injection pipeline's input links to each other with the salt-free water source, and output after two water injection pipeline confluence links to each other with high pressure water injection pipeline 1 and the tie point is located between normally closed valve two 4 and normally open valve 5, and water injection pipeline is equipped with normally closed valve three 18, water injection pump 19, motorised valve 20 and check valve 21 by input to output in proper order.
Preferably, the auxiliary water injection module is provided with two sets of power supplies which are mutually standby.
Preferably, the high-pressure water charging pipeline 1 is located at the output end of the second spring check valve 6 and is provided with a first hydrophobic sewage draining branch, the first hydrophobic sewage draining branch is connected with a first hydrophobic pipe 14, and the first hydrophobic sewage draining branch is provided with a normally-closed valve four 12 and a normally-closed valve five 13.
Preferably, the high-pressure water charging pipeline 1 is located and is equipped with normally closed valve six 15 between spring check valve 3 and normally closed valve two 4, and the high-pressure water charging pipeline 1 is located and is equipped with the hydrophobic blowdown branch road of second between normally closed valve six 15 and the normally closed valve two 4, and the hydrophobic blowdown branch road of second links to each other with second drain pipe 17, is equipped with normally closed valve seven 16 on the hydrophobic blowdown branch road of second.
Preferably, the water injection pipeline is connected in parallel with a water injection bypass, and a normally closed valve eight 22 and a check valve two 23 are sequentially arranged on the water injection bypass from the input end to the output end.
The utility model discloses during the use, at first fill water through filling water module to boiler forced circulation pump's cavity 7 and cooler 8, after filling water, open normally closed valve three 18, survey manometer 11's number of degrees and contrast it with stove water pressure, with this judge whether there is the possibility that stove water leaks into in the cavity 7, when stove water pressure is higher and pressure differential reaches the setting value, water injection pump 19 starts and motorised valve 20 intercommunication, demineralized water often opens one 5 and spring check valve two 6 pours into the water pressure of the interior motor cooling water of cavity in order to increase in the cavity 7, thereby installation has been avoided, the condition of accidents such as generator electric leakage in the relatively poor stove water of quality gets into cavity 7 in the debugging link of unit operation initial stage such as pickling and blowpipe, the safe operation of circulating pump has been guaranteed. The utility model discloses an auxiliary water injection module has two each other and is for reserve water injection pipeline and two sets of each other and is for reserve power, and the reliability is higher.
The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various improvements made by the method concept and technical solution of the present invention or directly applied to other occasions without improvement are all within the protection scope of the present invention.
Claims (5)
1. A water injection system for a cavity of a forced circulation pump of a boiler comprises a water filling module and an auxiliary water injection module, and is characterized in that the water filling module comprises a high-pressure water filling pipeline (1), the high-pressure water filling pipeline (1) is sequentially provided with a first normally-closed valve (2), a first spring check valve (3), a second normally-closed valve (4), a first normally-opened valve (5) and a second spring check valve (6) from an input end to an output end, the output end of the high-pressure water filling pipeline (1) is divided into two paths and is respectively connected with the cavity (7) and a cooler (8) of the boiler circulation pump, a pressure detection branch is arranged between the second normally-closed valve (4) and the first normally-opened valve (5) of the high-pressure water filling pipeline (1), the end part of the branch is provided with a pressure,
the supplementary water injection module includes two water injection pipelines that connect in parallel each other, and water injection pipeline's input links to each other with the salt-free water source, and output after two water injection pipeline confluence links to each other with high pressure water injection pipeline (1) and the tie point is located between normally closed valve two (4) and normally open valve (5), and water injection pipeline is equipped with normally closed valve three (18), water injection pump (19), motorised valve (20) and check valve (21) by input to output in proper order.
2. The boiler forced circulation pump chamber water injection system of claim 1, wherein the auxiliary water injection module is provided with two sets of power supplies which are mutually standby.
3. The boiler forced circulation pump chamber water injection system according to claim 1, characterized in that the high pressure water charging pipeline (1) is provided with a first hydrophobic sewage draining branch at the output end of the second spring check valve (6), the first hydrophobic sewage draining branch is connected with a first hydrophobic pipe (14), and the first hydrophobic sewage draining branch is provided with a normally closed valve four (12) and a normally closed valve five (13).
4. The boiler forced circulation pump chamber water injection system according to claim 1, characterized in that a normally closed valve six (15) is arranged between the spring check valve one (3) and the normally closed valve two (4) in the high-pressure water charging pipeline (1), a second hydrophobic sewage draining branch is arranged between the normally closed valve six (15) and the normally closed valve two (4) in the high-pressure water charging pipeline (1), the second hydrophobic sewage draining branch is connected with a second hydrophobic pipe (17), and a normally closed valve seven (16) is arranged on the second hydrophobic sewage draining branch.
5. The boiler forced circulation pump chamber water injection system according to claim 1, wherein the water injection pipeline is connected in parallel with a water injection bypass, and a normally closed valve eight (22) and a check valve two (23) are sequentially arranged on the water injection bypass from an input end to an output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920348322.3U CN209876895U (en) | 2019-03-19 | 2019-03-19 | Water injection system for cavity of forced circulation pump of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920348322.3U CN209876895U (en) | 2019-03-19 | 2019-03-19 | Water injection system for cavity of forced circulation pump of boiler |
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| Publication Number | Publication Date |
|---|---|
| CN209876895U true CN209876895U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920348322.3U Active CN209876895U (en) | 2019-03-19 | 2019-03-19 | Water injection system for cavity of forced circulation pump of boiler |
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| Country | Link |
|---|---|
| CN (1) | CN209876895U (en) |
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2019
- 2019-03-19 CN CN201920348322.3U patent/CN209876895U/en active Active
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