CN106151004B - A kind of water-aspirator pressure surge tank fault detection method and water pump - Google Patents
A kind of water-aspirator pressure surge tank fault detection method and water pump Download PDFInfo
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- CN106151004B CN106151004B CN201610613136.9A CN201610613136A CN106151004B CN 106151004 B CN106151004 B CN 106151004B CN 201610613136 A CN201610613136 A CN 201610613136A CN 106151004 B CN106151004 B CN 106151004B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 286
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 3
- 230000011664 signaling Effects 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 239000010985 leather Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a kind of water-aspirator pressure surge tank fault detection method, including, pressure surge tank, and it is arranged on the high pressure end of water pump；Flow switch senser, for detecting water pump water-flow signal；Pressure Switch Sensor, for detecting water-aspirator pressure signal；Controller, for receiving water-flow signal, pressure signal and the start and stop for controlling water pump；It is continuous to record the dwell time of water pump when water pump disconnects in water-flow signal, and utilize recorded dwell time size to judge whether the pressure surge tank of water pump breaks down, and by controller output pressure surge tank fault-signal；Pressure surge tank fault message is provided the user, facilitates user to fix a breakdown and maintains the normal work of water pump；Also disclose the water pump using above-mentioned pressure surge tank fault detection method.
Description
Technical Field
The invention relates to the technical field of water pumps, in particular to the technical field of control of water pumps, and specifically relates to a fault detection method for a pressure buffer tank of a water pump.
Background
The water pump is an important component of a water supply and drainage system, and along with the development of science and technology, an intelligent control system is more and more widely applied to the field of civil water pumps; at present, the pressure switch sensor and the flow switch sensor are used, the pressure switch sensor is used for detecting a pressure signal of the water pump and outputting a pressure switch quantity signal to the water pump controller, the flow switch sensor is used for detecting a water flow signal of the water pump and outputting a water flow switch quantity signal to the water pump controller; the water pump controller controls the start and stop of the water pump through the received pressure switching value signal and the water flow switching value signal; the intellectualization of water supply is realized.
In order to reduce the starting and stopping frequency of a water pump, a pressure buffer tank is arranged at a high-pressure end (namely an outlet end) of the water pump at present to provide a certain amount of buffer water for a water supply system of the water pump, when the water pump stops, water is supplied by water stored in the pressure buffer tank at the moment of starting a water outlet or for a period of time, when the pressure drops, a water pump controller is touched to start the water pump again to supply water for normal operation, and meanwhile, the pressure buffer tank is supplemented with water to the current pressure; when the water outlet is closed and the water is stopped, the water pump controller controls the water pump to stop or continue to operate for a certain time according to the current pressure of the water pump.
Most of the pressure buffer tanks of the water pumps used at present are of built-in leather bag structures, and are pre-filled with gas with certain pressure; during the use process, the built-in leather bag is damaged, and the pre-filled gas is leaked, so that the buffer effect of the pressure buffer tank is reduced or failed; the starting and stopping frequency of the water pump is influenced, if the pressure buffer tank fails, the water pump is frequently started and stopped in a water using state of starting and stopping the water pump under the control of a pressure signal, the service life of the water pump is influenced, and meanwhile, the loss of electric energy is also caused; the existing intelligent water pump using the pressure buffer tank cannot provide pressure buffer tank fault information for users, and the users cannot know whether faults such as damage of a built-in leather bag or leakage of pre-filled gas occur or not from the surface phenomenon of the pressure buffer tank.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a fault detection method for a water pump pressure buffer tank, which is characterized in that whether the water pump pressure buffer tank has a fault or not is judged according to the stop time of a water pump and a fault signal is output; the problem of the user can't learn whether pressure buffer tank has the trouble is solved, the normal work of water pump has further been guaranteed, the life of water pump can be prolonged.
Another objective of the present invention is to provide a water leakage detection method, wherein a plurality of time ratios are obtained by continuously comparing the stop time of the water pump twice before and after, and if the time ratios are stable within a range, it can be determined that there is a possibility of water leakage, and a water leakage signal is output; the intelligent degree of the water pump is further improved.
In order to solve the defects in the prior art, the technical scheme adopted by the invention is as follows:
a fault detection method for a pressure buffer tank of a water pump comprises the steps that the pressure buffer tank is arranged at a high-pressure end of the water pump; the flow switch sensor is used for detecting a water flow signal of the water pump; the pressure switch sensor is used for detecting a pressure signal of the water pump; the controller is used for receiving the water flow signal and the pressure signal and controlling the start and stop of the water pump; comprises the following steps of (a) carrying out,
when the pressure signal is detected to be disconnected, controlling the water pump to start to operate;
when the water pump runs, if a water flow signal is detected, the water pump is controlled to run continuously;
if the pressure signal and the water flow signal cannot be detected for N seconds, controlling the water pump to stop running, wherein N is 10-1800;
if the pressure signal is detected but the water flow signal is not detected, controlling the water pump to operate for M seconds and then stop, wherein M is more than 0, and executing the following steps;
continuously timing and recording the stop time of the water pump, wherein the stop time is the time from the stop to the restart of the water pump;
when the stop time value is detected to be less than t at least once, outputting a pressure buffer tank fault signal; and t is the time from the highest pressure value to the starting pressure value of the water pump when the water pump stops and water is supplied at the water flow speed with the minimum measurement precision of the flow switch sensor.
Preferably, t is 0.1 to 60 seconds.
Further, when the stop time value is less than t for at least 2 times continuously detected, outputting a pressure buffer tank fault signal; wherein t is 0.5-15.
Preferably, M is 3 to 30.
Furthermore, an air bag is arranged in the pressure buffer tank, the volume of the air bag is 1-5 liters, and the M is 3-15.
Further, the stop time of the water pump is continuously compared for two times before and after the stop time of the water pump is continuously compared for obtaining a plurality of time ratios, and if the time ratios are all between 0.8 and 1.2 in continuous Y minutes, the controller outputs a water leakage signal; wherein Y is 3 to 720; furthermore, the controller outputs a water leakage signal and controls the water pump to stop running at the same time.
The water pump using any one of the above fault detection methods for the water pump pressure buffer tank comprises a check valve, the pressure buffer tank, a pressure switch sensor, a flow switch sensor and a controller; wherein,
the pressure surge tank is disposed at a high pressure end of the water pump, and the check valve is disposed upstream of the pressure surge tank.
The controller is used for connecting a power supply and controlling the starting and stopping of the water pump.
The pressure switch sensor is arranged at the high-pressure end of the water pump, is used for detecting the outlet pressure of the water pump, is connected with the controller and outputs a pressure switching value signal to the controller 1.
The flow switch sensor is arranged at the low-pressure end of the water pump and used for detecting water flow signals of the water pump, is connected with the controller and outputs water flow switching value signals to the controller.
Compared with the prior art, the invention has the beneficial effects that:
according to the method, when the water flow signal is disconnected, the stop time of the water pump is recorded, whether the pressure buffer tank of the water pump has a fault or not is judged according to the stop time, and the water leakage signal is output, so that the problem that the existing intelligent water pump cannot detect the fault of the pressure buffer tank is solved, a user can know the fault information at the first time when the pressure buffer tank has the fault, the pressure buffer tank can be subjected to fault elimination or replaced with a new pressure buffer tank, the normal work of the water pump is guaranteed, and the service life of the water pump is guaranteed.
Meanwhile, the water leakage detection method provided by the invention can enable a user to acquire water leakage information under the conditions that a water supply pipeline has a leakage point or the water outlet is not tightly closed by the user, so that the user can conveniently remove the water leakage point, and the intelligent degree of the water pump is improved.
In addition, the invention also provides the water pump using the water pump pressure buffer tank fault detection method, which has the functions of pressure buffer tank fault detection and fault signal output and improves the intelligent degree of the water pump.
Drawings
Fig. 1 is a schematic structural diagram of a water pump according to an embodiment of the present invention;
fig. 2 is a schematic connection diagram of functional modules of a water pump according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a method for detecting a fault of a pressure buffer tank of a water pump according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a water leakage detection method according to an embodiment of the present invention;
Detailed Description
Example (b):
a water pump shown in fig. 1 and 2 comprises a base 9, an inlet 7, an outlet 6, a pump body 8, a check valve 5, a pressure buffer tank 4, a pressure switch sensor 2, a flow switch sensor 3 and a controller 1; the inlet 7 is a low-pressure end of the water pump and is connected with the pump body 8; the outlet 6 is a high-pressure end of the water pump and is connected with the pump body 8; the pump body 8 is arranged on a base 9; the controller 1 is provided on a base 9 (the water pump motor is not shown in fig. 1).
The check valve 5 is arranged at the outlet 6 of the water pump.
The pressure buffer tank 4 is arranged at the outlet 6 of the water pump, downstream of the non-return valve 5.
The controller 1 is used for connecting a power supply and controlling the starting and stopping of the water pump.
The pressure switch sensor 2 is arranged at the outlet 6 and downstream of the check valve 5; the pressure switch is used for detecting the outlet pressure of the water pump, is connected with the controller 1 and outputs a pressure switching value signal to the controller 1.
The flow switch sensor 3 is arranged at the inlet 7 and used for detecting water flow signals of the water pump, is connected with the controller 1 and outputs water flow switching value signals to the controller 1.
Referring to fig. 3, the control method of the water pump using the method for detecting the fault of the water pump pressure buffer tank includes the following steps:
s101, when the pressure signal is detected to be disconnected, controlling the water pump to start to operate;
s102, when the water pump runs, if a water flow signal is detected, controlling the water pump to run continuously;
if the pressure signal and the water flow signal cannot be detected for N seconds, controlling the water pump to stop running, wherein N is 10-1800;
if the pressure signal is detected but the water flow signal is not detected, controlling the water pump to operate for M seconds and then stop, wherein M is more than 0, and executing the following steps;
s103, continuously timing and recording the stop time of the water pump, wherein the stop time is the time from the stop to the restart of the water pump;
s104, outputting a pressure buffer tank fault signal when detecting that the stop time value is less than t at least once; and t is the time from the highest pressure value to the starting pressure value of the water pump when the water pump stops and water is supplied at the water flow speed with the minimum measurement precision of the flow switch sensor.
Preferably, a pressure buffer tank fault signal is output when the stop time value is less than t for at least 2 consecutive times.
Preferably, M is 3 to 30, more preferably, M is 3 to 15.
The principle is as follows: after the water pump is electrified, the controller determines whether to start the water pump to operate according to a pressure signal received by the pressure switch sensor, and when the pressure signal is cut off, the controller controls the water pump to start and always keeps the water pump in a certain pressure state.
If the water is stopped, even if the water pump stops running, the water pump is maintained at the current pressure under the action of the check valve; when water is used, the pressure of the water pump is reduced, the pressure signal is cut off, and the controller controls the water pump to start to operate so as to keep the pressure of the water pump at or above a target pressure value.
When the water pump operates and continues the water use, the controller will receive the rivers signal, at this moment, even the controller receives pressure signal, also continue to control the water pump operation, until rivers signal disconnection to guarantee that water supply pressure is steady (the water pump is in full lift water supply state this moment), reduce the frequency of opening and stopping of water pump.
One situation is that the water pump may have water inlet loss, the controller cannot receive the pressure signal and the water flow signal, the water pump is in idle running, and the water pump is stopped to run at the moment, so that the long-time idle running of the water pump is avoided, the electric energy is wasted, and the service life of the water pump is not influenced; according to the structure and performance conditions of different types of water pumps, a proper value of N is selected, and in general, N can be any value between 10 and 1800.
The existing flow switch sensor is caused by the structure of the existing flow switch sensor, and the flow switch sensor cannot detect a water flow signal when a water pump supplies water at a small flow rate; in addition, the precision of the flow switch sensors produced by different manufacturers is different, the minimum water flow speed which can be detected by the flow switch sensor with relatively high precision at present is about 10ml/s (namely 10 ml/s), while the minimum water flow speed which can be detected by the flow switch sensor configured on most intelligent self-priming pumps is about 50ml/s (namely 3 liters/min), and some flow switch sensors can detect water flow speed even reaching 80 ml/s; therefore, when the water pump is in low-flow water supply (namely, the water pump is lower than the minimum water flow speed detected by the flow switch sensor), the controller can not receive the water flow signal and controls the start and stop of the water pump according to the pressure signal, and the water pump can be frequently started and stopped even if the pressure buffer tank is configured; causing the service life of the water pump to be reduced.
The pressure buffer tank 4 is provided with a water pump, and is generally configured when the water pump leaves a factory, and the volume of the pressure buffer tank is 1-5 liters; at present, a built-in leather bag pressure tank is mainly used, and the pressure tank is inflated before use to have certain pressure; in the use process of the water pump, the pressure buffer tank 4 may generate gas leakage to cause insufficient pressure, and the leather bag may be damaged to cause the loss of the pressure buffer function; if the pressure of the pressure buffer tank 4 is insufficient or the leather bag is damaged, the starting and stopping frequency of the water pump is increased when the water supply is carried out at a small flow rate; therefore, a method for fault detection of a pressure buffer tank is needed so that a user can know pressure buffer tank fault information.
When the pressure buffer tank works normally, under the condition that the water pump can detect the minimum water flow speed by the flow sensor, the time for the water pump to be disconnected from the highest pressure value to the pressure signal is measured; the time is the minimum stopping time of the water pump under the condition of small flow, and once the stopping time of the water pump is less than the minimum stopping time, the pressure buffer tank can be judged to be in fault; however, in actual use, in addition to the pressure buffer tank of the water pump, a pressure buffer device is additionally disposed at the downstream of the water pump, and therefore a networking test (including a post-pressure buffer device) needs to be performed on the water pump to obtain a more accurate minimum stop time (i.e., t) of the water pump, so as to accurately set the time t.
For example, if the minimum water flow speed detected by the flow switch sensor is 50ml/s, and the time for the water pump to decrease from the highest pressure value to the starting pressure value of the water pump at the water flow speed is 10 seconds, t can be set to be greater than 0 second and less than 10 seconds; namely, as long as the stop time is detected to be less than t, the pressure buffer tank can be judged to have a fault;
the maximum pressure value is the maximum pressure value which can be reached by the water pump continuously operating at the water flow speed of 50ml/s, and the starting pressure value is determined by the pressure switch sensor, namely the critical pressure value of the pressure signal which can be detected by the pressure switch sensor.
When water is supplied at the minimum water flow speed which can be detected by the existing flow switch sensor, the time (i.e. t) from the highest pressure value of the water pump to the starting pressure value of the water pump is basically within 60 seconds; thus, preferably, t is 0.1 to 60 seconds; if the flow switch sensor is selected to have a low accuracy of water flow detection due to cost considerations, t is substantially within 15, and therefore more preferably, t is 0.5 to 15.
Further, according to the water use habit of users, the condition is that the household water is mainly used for kitchens, toilets, clothes washing and the like, for example, the water used in kitchens is usually short-time large-flow frequent water use; the water consumption of the toilet is large, and except for long-time large-flow water consumption during bathing, the toilet uses large-flow short-time water consumption at other times; the washing water is large-flow water for a long time; the second situation is that the agricultural water is mainly used for irrigation, and the water is basically used in large flow and short time; in both domestic and agricultural water applications, small flow rates are not practical and are less likely to be used for long periods of time.
When a leakage point exists in a pipeline at the downstream of the water pump or a water outlet is not closed tightly (the water leakage speed is less than the water flow speed detected by the flow sensor), the time from the stop to the restart of the water pump each time is basically kept unchanged or slightly changed; if the user has not used water, the stop time of the water pump will remain substantially unchanged or vary little for a long time.
Therefore, further, as shown in fig. 4, in the process of step S104, step S105 is added, the stop time of the water pump is continuously compared twice before and after, so as to obtain a plurality of time ratios, and if the plurality of time ratios are all between 0.8 and 1.2 within continuous Y minutes, the controller outputs a water leakage signal; wherein Y is 3 to 720.
The water leakage signal can be sent from the controller to a fault display lamp and/or a display screen and/or a buzzer to remind a user that the water leakage possibility exists in the current water supply pipeline and the water leakage point needs to be eliminated, and the user can judge whether to continue to keep the normal operation of the water pump according to the current water supply system condition; if the water leakage signal of the water pump is triggered by mistake due to the fact that a user uses water for a long time at a small flow rate, the user can ignore or eliminate the water leakage fault alarm through reset operation.
In addition, the controller can directly control the water pump to stop running and temporarily stop supplying water while outputting a water leakage signal; and after the controller is reset or electrified again, the water pump starts to work normally again.
Claims (8)
1. A fault detection method for a pressure buffer tank of a water pump comprises the steps that the pressure buffer tank is arranged at a high-pressure end of the water pump; the flow switch sensor is used for detecting a water flow signal of the water pump; the pressure switch sensor is used for detecting a pressure signal of the water pump; the controller is used for receiving the water flow signal and the pressure signal and controlling the start and stop of the water pump; the method is characterized in that: comprises the following steps of (a) carrying out,
when the pressure signal is detected to be disconnected, controlling the water pump to start to operate;
when the water pump runs, if a water flow signal is detected, the water pump is controlled to run continuously;
if the pressure signal and the water flow signal cannot be detected for N seconds, controlling the water pump to stop running, wherein N is 10-1800;
if the pressure signal is detected but the water flow signal is not detected, controlling the water pump to operate for M seconds and then stop, wherein M is more than 0, and executing the following steps;
continuously timing and recording the stop time of the water pump, wherein the stop time is the time from the stop to the restart of the water pump;
when the stop time value is detected to be less than t at least once, outputting a pressure buffer tank fault signal; and t is the time from the highest pressure value to the starting pressure value of the water pump when the water pump stops and water is supplied at the water flow speed with the minimum measurement precision of the flow switch sensor.
2. The water pump pressure buffer tank fault detection method of claim 1, characterized in that: the t is 0.1-60 seconds.
3. The water pump pressure buffer tank fault detection method of claim 2, characterized in that: when the stop time value is less than t for at least 2 times continuously detected, outputting a pressure buffer tank fault signal; wherein t is 0.5-15.
4. The water pump pressure buffer tank fault detection method of claim 1, characterized in that: and M is 3-30.
5. The water pump pressure buffer tank fault detection method of claim 1, characterized in that: an air bag is arranged in the pressure buffer tank, the volume of the air bag is 1-5 liters, and M is 3-15.
6. The water pump pressure buffer tank fault detection method of claim 1, characterized in that: continuously comparing the stop time of the water pump twice before and after to obtain a plurality of time ratios, and if the time ratios are all between 0.8 and 1.2 within continuous Y minutes, outputting a water leakage signal by the controller; wherein Y is 3 to 720.
7. The water pump pressure buffer tank fault detection method of claim 1, characterized in that: continuously comparing the stop time of the water pump twice before and after to obtain a plurality of time ratios, and if the time ratios are all between 0.8 and 1.2 within continuous Y minutes, outputting a water leakage signal and stopping the operation of the water pump by the controller; wherein Y is 3 to 720.
8. The water pump according to any one of claims 1 to 7, wherein the method comprises detecting a failure in a pressure buffer tank of the water pump
Characterized in that: the device comprises a check valve, a pressure buffer tank, a pressure switch sensor, a flow switch sensor and a controller; wherein,
the pressure buffer tank is arranged at the high-pressure end of the water pump, and the check valve is arranged at the upstream of the pressure buffer tank;
the controller is used for connecting a power supply and controlling the starting and stopping of the water pump;
the pressure switch sensor is arranged at the high-pressure end of the water pump, is used for detecting the outlet pressure of the water pump, is connected with the controller and outputs a pressure switching value signal to the controller;
the flow switch sensor is arranged at the low-pressure end of the water pump and used for detecting water flow signals of the water pump, is connected with the controller and outputs water flow switching value signals to the controller.
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| US11886178B2 (en) | 2021-11-11 | 2024-01-30 | Yantai Jereh Oilfield Services Group Co., Ltd. | Fault diagnosis method, method for building fault diagnosis model, equipment, device and medium |
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| CN111255705B (en) * | 2020-01-15 | 2021-07-16 | 台州浙里泵业有限公司 | Self priming pump control system |
| CN114293623B (en) * | 2021-12-30 | 2024-03-19 | 浙江天信仪表科技有限公司 | Check valve fault judging method and system for water supply equipment and water supply equipment |
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| JP4668403B2 (en) * | 2000-10-19 | 2011-04-13 | 株式会社荏原製作所 | Water supply equipment |
| CN2528808Y (en) * | 2002-02-10 | 2003-01-01 | 冯伟强 | Ground type automatic control constant-pressure output water supply device |
| CN100594149C (en) * | 2006-12-18 | 2010-03-17 | 南车青岛四方机车车辆股份有限公司 | Railroad coach water supply system water pump hydropenia protected controlled device and method |
| CN101761472B (en) * | 2008-12-10 | 2013-05-08 | 北京谊安医疗系统股份有限公司 | Method and device for detecting fault and efficiency of an air compressor |
| CN103671047B (en) * | 2013-12-13 | 2016-04-13 | 新界泵业集团股份有限公司 | A kind of electric pump of tape controller and controlling method thereof |
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| US11886178B2 (en) | 2021-11-11 | 2024-01-30 | Yantai Jereh Oilfield Services Group Co., Ltd. | Fault diagnosis method, method for building fault diagnosis model, equipment, device and medium |
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Effective date of registration: 20230913 Address after: 317525 Dayang City Industrial Zone, Daxi Town, Wenling City, Taizhou City, Zhejiang Province (2nd floor, Building 1, Wenling South China Cable Co., Ltd.) (self declared) Patentee after: Taizhou Jingtai Electromechanical Co.,Ltd. Address before: 317600 Guangling Road, Yucheng Street, Yuhuan County, Taizhou City, Zhejiang Province, 132 Patentee before: Chen Hui |
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Effective date of registration: 20240426 Address after: 317525 Ocean City Industrial Zone, Dashi Town, Wenling City, Taizhou, Zhejiang Patentee after: Zhejiang Yinwei Technology Co.,Ltd. Country or region after: China Address before: 317525 Dayang City Industrial Zone, Daxi Town, Wenling City, Taizhou City, Zhejiang Province (2nd floor, Building 1, Wenling South China Cable Co., Ltd.) (self declared) Patentee before: Taizhou Jingtai Electromechanical Co.,Ltd. Country or region before: China |
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