CN215633681U - Automatic water replenishing device for high-pressure replenishing water of furnace water circulating pump - Google Patents
Automatic water replenishing device for high-pressure replenishing water of furnace water circulating pump Download PDFInfo
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- CN215633681U CN215633681U CN202121353642.1U CN202121353642U CN215633681U CN 215633681 U CN215633681 U CN 215633681U CN 202121353642 U CN202121353642 U CN 202121353642U CN 215633681 U CN215633681 U CN 215633681U
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Abstract
The utility model relates to an automatic water supplementing device for high-pressure supplementing water of a furnace water circulating pump, and belongs to the technical field of water supplementing systems of circulating pumps. Automatic water supply device of stove water circulating pump high pressure makeup water, including first moisturizing hand-operated gate, moisturizing solenoid valve, second moisturizing hand-operated gate and high pressure water supply cooler, the input intercommunication high pressure moisturizing pipe of high pressure water supply cooler, the interval is equipped with on the high pressure moisturizing pipe first moisturizing hand-operated gate with second moisturizing hand-operated gate, first moisturizing hand-operated gate with be equipped with between the second moisturizing hand-operated gate the moisturizing solenoid valve, the output intercommunication stove water circulating pump of high pressure water supply cooler. Has the advantages that: can ensure that the high-pressure water supplement of the furnace water circulating pump is automatically and timely turned on or off.
Description
Technical Field
The utility model belongs to the technical field of circulating pump water replenishing systems, and particularly relates to an automatic high-pressure water replenishing device of a furnace water circulating pump.
Background
In a thermal power plant, a furnace water circulating pump is provided with high-pressure make-up water (from an electric pump outlet or a condensate outlet) and a low-pressure cooling water system (from closed water); (high pressure make-up water is only for low pressure cooling water)
The low-pressure cooling water acts: firstly, cooling water which is used as high-pressure make-up water and enters a cooler in front of a furnace water circulating pump (the temperature of the high-pressure make-up water after the cooler is controlled at 21-49 ℃ according to regulations); and secondly, the cooling water is used as the cooling water of the furnace water circulating pump motor.
High-pressure water supplementing effect; in the starting and stopping processes of the unit, in order to prevent the water quality of the boiler water from polluting the environment of a motor cavity of a boiler water circulating pump, the motor cavity needs to be continuously injected with water, and air is prevented from being accumulated in a pump body (regulations stipulate that the continuous water injection is kept before the water feeding, ignition and pressure boosting of a boiler are carried out until the pressure of a steam drum reaches 2.07MPa, and a water replenishing door is closed after the pressure exceeds 2.07 MPa; when the furnace water circulating pump stops running and discharging water, continuous water injection is required to be kept until the pump shell is cooled to be below 62 ℃, and the continuous water injection can not be stopped; and thirdly, when the temperature of a motor cavity of the furnace water circulating pump rises or high-pressure cooling water leaks during the normal operation of the unit, high-pressure make-up water is required to be added immediately to make up the cooling water quantity of the motor circulating loop.
During the startup, shutdown and normal operation of the unit, low-pressure cooling water is put into operation all the time, and high-pressure make-up water is continuously injected only before the boiler is supplied with water, ignited and boosted until the pressure of a steam drum reaches 2.07MPa, and a water filling door is closed after the pressure exceeds 2.07 MPa; and when the steam drum pressure is lower than 2.07MPa, the water injection door is closed according to the temperature requirement of the pump shell of the boiler water pump during the shutdown period of the re-set. However, in most of the existing water injection operations of boiler water circulating pumps in thermal power plants, an operator needs to manually open a water-replenishing manual door on site according to needs to replenish water. Once the furnace water pump is lack of water and can not timely supply water under the abnormal condition, or the temperature of a motor cavity of the furnace water circulating pump is abnormally increased, the furnace water pump can be unstably operated, and great hidden danger is brought to the safe and stable operation of a unit.
Therefore, the automatic water replenishing device for the high-pressure replenishing water of the furnace water circulating pump is provided to solve the defects in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model provides the automatic water replenishing device for the high-pressure replenishing water of the furnace water circulating pump, which aims to solve the technical problems that the high-pressure replenishing water of the furnace water circulating pump can be automatically and timely turned on or off, the operation and management are inconvenient, the water replenishing is not timely under the abnormal condition of the furnace water circulating pump and the like.
The technical scheme for solving the technical problems is as follows: this stove water circulating pump high pressure make-up water automatic water supply device includes first moisturizing hand door, moisturizing solenoid valve, second moisturizing hand door and high pressure water supply cooler, the input intercommunication high pressure moisturizing pipe of high pressure water supply cooler, the interval is equipped with on the high pressure moisturizing pipe first moisturizing hand door with second moisturizing hand door, first moisturizing hand door with be equipped with between the second moisturizing hand door the moisturizing solenoid valve, the output intercommunication stove water circulating pump of high pressure water supply cooler.
Has the advantages that: can ensure that the high-pressure water supplement of the furnace water circulating pump is automatically and timely turned on or off, and solves the problems of inconvenient operation and management, untimely water supplement under the abnormal condition of the furnace water circulating pump and the like.
Further, the high-pressure water replenishing pipe is further provided with a water replenishing bypass, and a water replenishing electromagnetic valve bypass door is arranged on the water replenishing bypass.
The beneficial effect of adopting the further scheme is that: thereby ensuring that the water replenishment is not interrupted.
Further, low-pressure cooling circulating water is arranged in the high-pressure water supplementing cooler.
The beneficial effect of adopting the further scheme is that: the high pressure water is rapidly cooled.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a logic diagram of a water replenishing solenoid valve;
in the drawings, the components represented by the respective reference numerals are listed below:
1. a first water replenishing manual door; 2. a water replenishing electromagnetic valve; 3. a second water replenishing manual door; 4. a water replenishing electromagnetic valve bypass door; 5. a high pressure water make-up cooler; 6. a furnace water circulating pump.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.
Example 1
As shown in fig. 1, this embodiment provides stove water circulating pump high pressure makeup water automatic water supply device, including first moisturizing hand-operated gate 1, moisturizing solenoid valve 2, second moisturizing hand-operated gate 3 and high pressure water supply cooler 5, high pressure water supply cooler 5's input intercommunication high pressure moisturizing pipe, the interval is equipped with on the high pressure moisturizing pipe first moisturizing hand-operated gate 1 with second moisturizing hand-operated gate 3, first moisturizing hand-operated gate 1 with be equipped with between the second moisturizing hand-operated gate 3 moisturizing solenoid valve 2, high pressure water supply cooler 5's output intercommunication stove water circulating pump 6, be equipped with low pressure cooling circulation water in the high pressure moisturizing cooler 5, high pressure moisturizing pipe still is equipped with the moisturizing bypass, be equipped with moisturizing solenoid valve bypass door 4 on the moisturizing bypass.
In specific implementation, as shown in fig. 2, the water replenishing solenoid valve 2 is internally provided with an interlock on/off logic of low drum pressure (less than or equal to 2.07MPa) and high drum pressure (more than 2.07MPa) under automatic conditions, and the water replenishing solenoid valve 2 is provided with an automatic and manual switching block (which can be switched to manual on/off operation when the drum pressure is high, and when a motor cavity leaks or the temperature is high).
The operation mode is as follows:
when the unit starts: 1) the water replenishing electromagnetic valve 2 is put into the logic block automatically;
2) at the moment, the water replenishing electromagnetic valve 2 can be interlocked to open the water replenishing electromagnetic valve according to the actual value of the pressure of the steam drum;
3) when the pressure of the steam drum is more than 2.07MPa, the water replenishing electromagnetic valve is automatically closed.
When the unit is shut down: 1) checking the automatic state of the water replenishing electromagnetic valve 2;
2) when the pressure of the steam drum is less than or equal to 2.07MPa, the water replenishing electromagnetic valve 2 is automatically opened;
3) when the temperature of the pump shell is lower than 62 ℃, the water replenishing electromagnetic valve 2 is automatically closed.
During the unit normal operating, if appear stove water pump motor cavity reveal or the temperature risees unusually, then the manual moisturizing solenoid valve 2 of removing is automatic, will not receive the high shutting of steam pocket pressure and open the condition influence this moment, can be according to the manual distant place switch moisturizing solenoid valve 2 of operator's needs.
Has the advantages that: the water replenishing electromagnetic valve 2 arranged on a water replenishing pipeline and the interlocking switching logic of low steam pocket pressure (less than or equal to 2.07MPa) and high steam pocket pressure (more than 2.07MPa) under the automatic condition of the interior of the water replenishing electromagnetic valve are utilized to realize the boiler water circulation 6 and the automatic water replenishing function during the starting or stopping period; meanwhile, in the normal operation period, the steam drum pressure high-water-replenishing electromagnetic valve 2 is locked and opened, automatic/manual undisturbed switching is designed, and manual remote opening or closing is realized.
In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and simplicity of description, and do not indicate or imply that the system or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. The utility model provides a stove water circulating pump high pressure make-up water automatic water supply device which characterized in that includes:
first moisturizing hand-operated gate (1), moisturizing solenoid valve (2), second moisturizing hand-operated gate (3) and high pressure moisturizing cooler (5), the input intercommunication high pressure moisturizing pipe of high pressure moisturizing cooler (5), the interval is equipped with on the high pressure moisturizing pipe first moisturizing hand-operated gate (1) with second moisturizing hand-operated gate (3), first moisturizing hand-operated gate (1) with be equipped with between second moisturizing hand-operated gate (3) moisturizing solenoid valve (2), the output of high pressure moisturizing cooler (5) communicates stove water circulating pump (6).
2. The automatic water replenishing device for high-pressure make-up water of a furnace water circulating pump according to claim 1, wherein the high-pressure make-up water pipe is further provided with a make-up water bypass, and a make-up water solenoid valve bypass door (4) is arranged on the make-up water bypass.
3. The automatic water replenishing device of the furnace water circulating pump high pressure make-up water according to claim 1, wherein the high pressure make-up water cooler (5) is internally provided with low pressure cooling circulating water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121353642.1U CN215633681U (en) | 2021-06-17 | 2021-06-17 | Automatic water replenishing device for high-pressure replenishing water of furnace water circulating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121353642.1U CN215633681U (en) | 2021-06-17 | 2021-06-17 | Automatic water replenishing device for high-pressure replenishing water of furnace water circulating pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215633681U true CN215633681U (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121353642.1U Active CN215633681U (en) | 2021-06-17 | 2021-06-17 | Automatic water replenishing device for high-pressure replenishing water of furnace water circulating pump |
Country Status (1)
| Country | Link |
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| CN (1) | CN215633681U (en) |
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2021
- 2021-06-17 CN CN202121353642.1U patent/CN215633681U/en active Active
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