CN219264592U - Feed pump recirculation system capable of monitoring bypass leakage flow - Google Patents
Feed pump recirculation system capable of monitoring bypass leakage flow Download PDFInfo
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- CN219264592U CN219264592U CN202223171607.5U CN202223171607U CN219264592U CN 219264592 U CN219264592 U CN 219264592U CN 202223171607 U CN202223171607 U CN 202223171607U CN 219264592 U CN219264592 U CN 219264592U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model relates to the technical field of leakage detection in a system, in particular to a water supply pump recirculation system capable of monitoring bypass leakage flow, which comprises the following components: a first flow measuring device is arranged on the water supply main path and is used for monitoring the flow on the water supply main path, and when the first flow measuring device monitors that the water supply flow of the water supply main path is higher than a preset value, the recirculation valve is in a closed state to the water supply bypass; the second flow measuring device monitors the water supply bypass in real time, when the recirculation valve leaks, the second flow measuring device can monitor, and at the moment, the recirculation valve can be repaired or replaced according to the monitoring result, so that the water supply efficiency of the water supply pump is prevented from being influenced, and a large amount of energy consumption is prevented from being increased.
Description
Technical Field
The utility model relates to the technical field of in-system leakage detection, in particular to a feed pump recirculation system capable of monitoring bypass leakage flow.
Background
The water supply pump recirculation system is characterized in that when the required flow of boiler water supply is very small, a bypass valve of a recirculation valve is timely opened, and the water supply of the water supply pump flows back to an inlet of the water supply pump from a bypass, so that the water supply pump is prevented from being damaged by cavitation, vortex, shaking and the like. And under the working condition of large flow of the feed water pump, the bypass valve of the recirculation valve is closed, and the bypass has no flow.
In the actual operation of the feed water pump recirculation system, the condition of feed water bypass leakage flow rate may exist, but the existing feed water pump recirculation system does not monitor the feed water bypass leakage flow rate, so that the internal leakage of the recirculation valve cannot be found in time, part of feed water circulates in the bypass all the time, further the feed water pump efficiency is seriously affected, and a large amount of energy consumption is increased.
Therefore, the prior art has a shortage and needs to be further developed.
Disclosure of Invention
In order to solve the problems, the utility model aims to provide a feed water pump recirculation system capable of monitoring bypass leakage flow so as to solve the technical problem that the existing feed water pump recirculation system lacks in detecting leakage of a feed water bypass.
The utility model aims at realizing the following technical scheme:
the utility model provides a water supply pump recirculation system capable of monitoring bypass leakage flow, which comprises: the water supply pump supplies water to the external equipment through a water supply main path, the recirculation valve is arranged on the water supply main path, a water supply bypass is led out from the recirculation valve, and the water supply bypass is connected back to the water supply pump;
a first flow measuring device is arranged on the water supply main path and is positioned between the recirculation valve and external equipment; the water supply bypass is provided with a second flow measuring device, and the second flow measuring device is positioned between the recirculation valve and the water supply pump.
A first pressure gauge is disposed on the feedwater main and is located on a side of the first flow measurement device remote from the recirculation valve.
A second pressure gauge is provided on the feedwater bypass and is located on a side of the second flow measurement device remote from the recirculation valve.
The feed water pump recirculation system further includes a shut-off valve disposed on the feed water bypass between the second pressure gauge and the feed water pump.
The feed pump recirculation system also includes a low pressure drum disposed on the feed water bypass between the shut-off valve and the feed pump.
The feed water pump recirculation system further comprises a check valve arranged on the feed water bypass and located between the low pressure drum and the feed water pump.
The feed pump recirculation system further includes a gate valve disposed on the feed water bypass and positioned between the check valve and the feed pump.
The feed pump recirculation system further includes a filter screen disposed on the feed water bypass and positioned between the gate valve and the feed pump.
The recirculation valve is a three-way valve, the three-way valve comprises a main way valve and a bypass valve, the main way valve is connected with a water supply main way, and the bypass valve is connected with a water supply bypass.
The main way valve and the bypass valve are self-operated valves.
The utility model has the following effective effects: a first flow measuring device is arranged on the water supply main path and is used for monitoring the flow on the water supply main path, and when the first flow measuring device monitors that the water supply flow of the water supply main path is higher than a preset value, the recirculation valve is in a closed state to the water supply bypass; the second flow measuring device monitors the water supply bypass in real time, when the recirculation valve leaks, the second flow measuring device can monitor, and at the moment, the recirculation valve can be repaired or replaced according to the monitoring result, so that the water supply efficiency of the water supply pump is prevented from being influenced, and a large amount of energy consumption is prevented from being increased.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 is a block diagram of a feedwater pump recirculation system of the present utility model that monitors bypass leak flow.
Wherein the reference numerals are as follows: 1-low pressure boiler barrel, 2-check valve, 3-gate valve, 4-filter screen, 5-feed pump, 6-recirculation valve, 7-first flow measuring device, 8-first manometer, 9-second flow measuring device, 10-second manometer, 11-stop valve.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
The feed water pump recirculation system is characterized in that when the required flow of boiler feed water is very small, a bypass valve of a recirculation valve is timely opened, and the feed water flows back to an inlet of the feed water pump from a feed water bypass, so that the pump is prevented from being damaged by cavitation, vortex, shaking and the like. Under the working condition of the water supply pump with larger flow, the bypass valve of the recirculation valve is closed, and the water supply bypass has no flow. However, in some cases, the recirculation valve or the water supply bypass may have an internal leakage, which cannot be found in time, so that part of the water supply is always circulated in the bypass, which results in serious influence on the water supply efficiency of the water supply pump to the external equipment, and increases a large amount of energy consumption.
Based on the above, referring to fig. 1, the present utility model provides a water pump recirculation system capable of monitoring bypass leakage flow, comprising: the water supply pump 5 and the recirculation valve 6, the recirculation valve 6 and the water supply pump 5 are arranged on a water supply main path, and the water supply pump 5 supplies water to an external device through the water supply main path. The feed pump recirculation system further comprises a feed water bypass leading from the recirculation valve 6 and connected to the feed water pump 5 for recirculating feed water to the feed water pump 5.
A first flow measuring device 7 is arranged on the water supply main path, the first flow measuring device 7 is positioned between the recirculation valve 6 and an external device (not shown in the figure), and the first flow measuring device 7 is used for monitoring the water supply flow of the water supply main path; a second flow measuring device 9 is arranged on the feed water bypass, the second flow measuring device 9 being located between the recirculation valve 6 and the feed water pump 5, the second flow measuring device 9 being arranged to monitor the feed water flow of the feed water bypass.
In a state in which the first flow measurement device 7 monitors that the feedwater flow of the feedwater main is higher than a preset value (higher than a set minimum flow value), the recirculation valve 6 is in a closed state to the feedwater bypass; the second flow measuring device 9 monitors the water supply bypass in real time, when the recirculation valve 6 leaks, the second flow measuring device 9 can monitor, and at this time, a user can repair or replace the recirculation valve 6 according to the monitoring result, so as to avoid affecting the water supply efficiency of the water supply pump 5 and increasing a large amount of energy consumption.
Under normal conditions, the water supply pump 5 supplies water to the boiler through the water supply main path, and the boiler is external equipment; but sometimes the boiler does not need much water, which may result in the water main requiring a flow below the minimum flow value of the feed pump 5. However, since the flow rate through the feed pump 5 cannot be lower than the minimum flow rate, the bypass valve on the recirculation valve 6 is opened, so that the feed pump 5 can bypass a part of water through the recirculation valve 6 to the low pressure drum 1, and then the water is returned to the feed pump 5 from the low pressure drum 1. Thus, the flow rate passing through the water feed pump 5 is not lower than the minimum flow rate, and the water feed main flow rate is reduced.
Because the water passing through the water supply bypass circulates at the inlet and outlet of the water supply pump 5 all the time, the water does idle work, and electricity is wasted; therefore, the water supply bypass should not have water flowing through it under normal conditions, and the water supply bypass is opened only under special conditions. While the water supply bypass is in a closed state, the second flow measuring device 9 monitors the water supply bypass in real time, and whether the water supply bypass has an internal leakage or not is determined by reading through the second flow measuring device 9.
In a preferred embodiment, the recirculation valve 6 is a three-way valve comprising a main and a bypass valve; the main way valve is connected with the water supply main way, and the bypass valve is connected with the water supply bypass; the water supply main circuit is controlled to be opened or closed by the opening or closing of the main circuit valve, and the water supply bypass is controlled to be opened or closed by the opening or closing of the bypass valve.
In a preferred embodiment, the main and bypass valves are self-actuated valves. Specifically, the feed pump 5 has a minimum flow value below which the flow cannot be lowered. The main path valve and the bypass valve of the recirculation valve 6 are both self-operated valves, the main path valve and the bypass valve can be automatically opened and closed according to the flow, when the data measured by the first flow measuring device 7 is designed to be smaller than the minimum flow value, the bypass valve is opened, and when the flow of the water supply main path is not smaller than the minimum flow value, the bypass valve is closed, so that energy loss is avoided.
The self-operated regulating valve is also called as self-operated control valve, and is a regulating valve which can drive valve to automatically work by means of self-operated pressure and temperature of medium flowing through the valve as energy source, and does not need external power supply and secondary instrument. Compared with a manual regulating valve, the valve has the advantages of automatic regulation; its advantage is no need of external power. In closed water circulation systems (such as hot water heating systems and air-conditioning chilled water systems), the valve is correctly used, so that flow distribution of the system and dynamic balance of the system can be conveniently realized, and debugging work of the system is greatly simplified.
Specifically, as is apparent from the above description, the bypass valve of the recirculation valve 6 is opened when the flow rate of the main feed water is smaller than the minimum flow rate value, and the feed water bypass is provided with the second detection means to monitor whether the bypass valve has an internal leakage problem when the bypass valve should not be opened.
For example, the feedwater pump 5 cannot be operated below a minimum flow value (typically 30% of rated flow), and the feedwater bypass is in a closed state when the data measured by the first flow measuring device 7 is greater than the minimum flow value. At this time, if the second flow measuring device 9 shows a value of zero, it is explained that there is no internal leakage between the bypass valve of the recirculation valve 6 and the feed water bypass. If the second flow measuring device 9 shows a value greater than zero, it is indicated that there is an internal leakage between the bypass valve of the recirculation valve 6 and the feed water bypass, the larger the value displayed the greater the internal leakage.
When the data measured by the first flow measuring means 7 is smaller than the minimum flow value, the bypass valve of the recirculation valve 6 is opened, and the bypass flow can be monitored by the display value of the first flow measuring means 7.
In a preferred embodiment, a first pressure gauge 8 is provided on the feed water main, the first pressure gauge 8 being located on the side of the first flow measuring device 7 remote from the recirculation valve 6. The first pressure gauge 8 is used for detecting the water pressure on the water supply main way, and the current water pressure condition on the water supply main way is known through the change of the reading. The first pressure gauge 8 and the second flow measuring device 9 detect the water supply main way together so as to correspondingly acquire two parameters of the current water supply main way water pressure condition and the current flow condition, so that the water pressure corresponding to the current water supply main way flow is known, and the monitoring of the water supply main way is facilitated.
In a preferred embodiment, a second pressure gauge 10 is arranged on the feedwater bypass, the second pressure gauge 10 being located on the side of the second flow measuring device 9 remote from the recirculation valve 6. The second pressure gauge 10 is used for detecting the water pressure on the water supply bypass, and the water pressure on the water supply bypass can be obtained through the change of the reading, so that a user can judge whether the water supply bypass has water flow through or not through the change of the reading of the second pressure gauge 10. If the reading of the second pressure gauge 10 is greater than zero in the state where the bypass valve is closed, this indicates that there is an internal leak by-pass of the feedwater, and the greater the reading, the greater the internal leak. The second pressure gauge 10 and the second flow measuring device 9 monitor the water supply bypass together so as to obtain the corresponding water pressure under the current internal leakage flow of the water supply bypass, and the second pressure gauge 10 and the second flow measuring device 9 can ensure more accurate monitoring of the water supply bypass and are more beneficial to monitoring.
In a preferred embodiment, the feed pump 5 recirculation system further comprises a shut-off valve 11, the shut-off valve 11 being arranged in the feed water bypass between the second pressure gauge 10 and the feed pump 5. The shut-off valve 11 serves as an isolation on the feed water bypass.
In a preferred embodiment, the feed pump 5 recirculation system comprises the above-described low pressure drum 1, the low pressure drum 1 being arranged in the feed water bypass between the second pressure gauge 10 and the feed pump 5. The low pressure drum 1 is also called a low pressure drum, and its functions include: (1) A certain amount of water is stored, the water volume of the evaporation equipment is increased, and the safety of water circulation is ensured; (2) The steam drum is internally provided with steam-water separation equipment, so that steam-water separation, steam cleaning, pollution discharge and the like can be effectively performed, the steam quality is ensured, and water treatment in the furnace can be performed; (3) The descending pipe and the ascending pipe are connected, so that the continuous proceeding of the steam-water circulation is ensured. In the present embodiment, the main function of the low pressure drum 1 is point (1).
In a preferred embodiment, the feed pump 5 recirculation system further comprises a non-return valve 2, the non-return valve 2 being arranged in the feed water bypass, between the low pressure drum 1 and the feed pump 5. The check valve 2 is mainly used for preventing the water supply from flowing backwards when the water supply pump 5 stops, and preventing the water supply pump 5 from reversing.
In a preferred embodiment, the feed pump 5 recirculation system further comprises a gate valve 3, the gate valve 3 being arranged in the feed water bypass, between the non-return valve 2 and the feed pump 5. The gate valve 3 is matched with the stop valve 11, and plays a role in isolating the flow on the water supply bypass; wherein, the pipeline of the feed pump 5 is thicker, the gate valve 3 is sampled; the feed water bypass is small in diameter, so a shut-off valve 11 is used.
In a preferred embodiment, the feed pump 5 recirculation system further comprises a sieve 4, the sieve 4 being arranged in the feed water bypass, between the gate valve 3 and the feed pump 5. The filter screen 4 is used to filter the flow of the feedwater bypass.
When the water feed pump 5 operates normally, the outlet flow is larger than the allowable minimum flow value; at this time, the bypass valve of the recirculation valve 6 is in a closed state, and the feed water is totally pumped to the heating surface of the boiler through the main valve, and the full flow rate is used for doing work; if the bypass valve leaks inwards, part of the feed water returns to the inlet of the feed water pump 5 through the feed water bypass (referring to fig. 1, 6, 9, 10, 11, 1, 2, 3 and 4 in turn), and the part of the feed water does not do work and consumes a part of electric energy, so that the problem of leakage in the bypass valve is found and treated in time, and the energy waste is avoided.
Referring to fig. 1, the water supply main path sequentially includes a water supply pump 5, a recirculation valve 6, a first flow measuring device 7 and a first pressure gauge 8; the water supply bypass comprises a recirculation valve 6, a second flow measuring device 9, a second pressure gauge 10, a stop valve 11, a low-pressure boiler barrel 1, a check valve 2, a gate valve 3 and a filter screen 4 in sequence, and the water supply bypass passes through the filter screen 4 and returns to the water supply pump 5, so that a circulating water supply bypass is formed.
The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.
Claims (10)
1. A feed pump recirculation system for monitoring bypass leakage flow, comprising: the water supply pump supplies water to the external equipment through a water supply main path, the recirculation valve is arranged on the water supply main path, a water supply bypass is led out from the recirculation valve, and the water supply bypass is connected back to the water supply pump;
a first flow measuring device is arranged on the water supply main path, and the first flow measuring device is positioned between the recirculation valve and external equipment; a second flow measuring device is arranged on the water supply bypass, and the second flow measuring device is positioned between the recirculation valve and the water supply pump.
2. The feedwater pump recirculation system of claim 1, wherein a first pressure gauge is disposed on the feedwater main, the first pressure gauge being located on a side of the first flow measurement device remote from the recirculation valve.
3. The feedwater pump recirculation system of claim 2, wherein a second pressure gauge is positioned on the feedwater bypass and on a side of the second flow measurement device remote from the recirculation valve.
4. The feedwater pump recirculation system of claim 3, further comprising a shut-off valve disposed on the feedwater bypass between the second pressure gauge and the feedwater pump.
5. The feedwater pump recirculation system of claim 4, further comprising a low pressure drum disposed on the feedwater bypass between the shut-off valve and the feedwater pump.
6. The feedwater pump recirculation system of claim 5, further comprising a check valve disposed on the feedwater bypass between the low pressure drum and the feedwater pump.
7. The feedwater pump recirculation system of claim 6, further comprising a gate valve disposed on the feedwater bypass between the check valve and the feedwater pump.
8. The feedwater pump recirculation system of claim 7, further comprising a screen disposed on the feedwater bypass between the gate valve and the feedwater pump.
9. The feedwater pump recirculation system of any of claims 1-7, wherein the recirculation valve is a three-way valve, the three-way valve including a main line valve and a bypass valve, the main line valve being connected to the feedwater main line, the bypass valve being connected to the feedwater bypass.
10. The feedwater pump recirculation system of claim 9, wherein the main and bypass valves are self-sustaining valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223171607.5U CN219264592U (en) | 2022-11-28 | 2022-11-28 | Feed pump recirculation system capable of monitoring bypass leakage flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223171607.5U CN219264592U (en) | 2022-11-28 | 2022-11-28 | Feed pump recirculation system capable of monitoring bypass leakage flow |
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| CN219264592U true CN219264592U (en) | 2023-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223171607.5U Active CN219264592U (en) | 2022-11-28 | 2022-11-28 | Feed pump recirculation system capable of monitoring bypass leakage flow |
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| CN (1) | CN219264592U (en) |
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- 2022-11-28 CN CN202223171607.5U patent/CN219264592U/en active Active
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