CN114293623A - Check valve fault judgment method and system for water supply equipment and water supply equipment - Google Patents
Check valve fault judgment method and system for water supply equipment and water supply equipment Download PDFInfo
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- CN114293623A CN114293623A CN202111661645.6A CN202111661645A CN114293623A CN 114293623 A CN114293623 A CN 114293623A CN 202111661645 A CN202111661645 A CN 202111661645A CN 114293623 A CN114293623 A CN 114293623A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 259
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000012423 maintenance Methods 0.000 claims abstract description 8
- 230000007257 malfunction Effects 0.000 claims description 17
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 239000008400 supply water Substances 0.000 claims description 3
- 238000003745 diagnosis Methods 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of water supply equipment, and particularly relates to a check valve fault judgment method and system for water supply equipment and the water supply equipment, wherein the method comprises the following steps: s1: acquiring a pressure value of a water inlet end of the water supply equipment during operation; if the pressure value in the water inlet end is increased and exceeds the preset pressure value, the water supply equipment has a fault of the check valve; s2: closing all water pump units, and releasing pressure of water supply equipment until the pressure of a water inlet end is smaller than a preset pressure value; s3: and independently starting the water pump units in each power pipeline one by one under the same condition, and positioning the position of the fault check valve based on the running pressure value of the water inlet end of the water supply equipment. The method is simple and strong in operability, can not only locate the fault point of the check valve, but also avoid secondary faults of equipment caused by the fault of the check valve, and simultaneously can ensure water supply after the check valve is damaged, so that time is provided for maintenance personnel to maintain.
Description
Technical Field
The invention belongs to the technical field of water supply equipment, and particularly relates to a check valve fault judgment method and system for water supply equipment and the water supply equipment.
Background
Check valves are usually arranged in the water supply equipment after the water pump to prevent the media from flowing backwards, and the water pump can be failed once the check valves are damaged, and the water pump can be subjected to air inlet burning and sealing in severe cases. In order to reduce the damage probability of the water pump, the existing water supply equipment usually adopts a conservative scheme to deal with the damage of the check valve, specifically, the water pump is usually closed to prevent the water pump from being pressurized circularly, and the check valve installed at the water inlet is reused to protect municipal water supply pipelines from being influenced by the outlet pressure. However, the above method still has the following disadvantages: 1) the pipe sections in front of the water pump, such as a steady flow tank, are not protected, so that the pipe sections are subjected to high-pressure influence caused by fault backflow of a check valve, and the pipe sections in front of the water pump can be cracked if serious; 2) after the water pump is closed, the water supply equipment stops normal water supply to influence normal use; 3) the positioning of the fault check valve can not be realized, and the inconvenience is brought to the follow-up maintenance.
Disclosure of Invention
The invention aims to provide a check valve fault judgment method and system for water supply equipment and the water supply equipment, so as to solve at least one problem in the prior art.
In one aspect, the present invention provides a method for determining a fault of a check valve of a water supply device, where the water supply device includes a plurality of power pipelines connected in parallel between a water inlet end and a water outlet end of the water supply device, and the power pipelines are connected to a water pump unit and a check valve, and the method includes: s1: acquiring a pressure value of a water inlet end of the water supply equipment during operation; if the pressure value in the water inlet end is increased and exceeds the preset pressure value, the water supply equipment has a fault of the check valve; s2: closing all water pump units, and releasing pressure of water supply equipment until the pressure of a water inlet end is smaller than a preset pressure value; s3: and independently starting the water pump units in each power pipeline one by one under the same condition, and positioning the position of the fault check valve based on the running pressure value of the water inlet end of the water supply equipment.
In the method for determining a malfunction of a check valve for a water supply facility, S3 preferably further includes: s31: independently starting a water pump unit on one power pipeline, and recording pressure values in a water inlet end and a water outlet end; s32: judging whether the pressure value of the water inlet end exceeds a preset threshold value, if not, judging that a check valve on the currently started power pipeline breaks down, and finishing fault screening; if yes, continuing to perform the next step;
s33: releasing pressure of the water supply equipment until the pressure of the water inlet end is smaller than a preset pressure value; s34: repeating S31-S33 until the failed check valve is located, or all power lines are screened; if all the power pipelines pass through the screening and still cannot locate the fault position of the check valve, the number of the faults of the check valve exceeds two.
As mentioned above, in the method for determining a fault of a check valve for a water supply device, it is further preferable that step S34 further includes recording the number of times of pressure relief after the fault of the water supply device occurs, and determining whether the number of times of pressure relief is greater than the number of water pump units, if so, all power lines are screened, and if not, the opposite is performed.
In the check valve malfunction determination method for a water supply facility as described above, it is further preferable that the step S34 further includes performing shutdown maintenance on the water supply facility when the number of check valve malfunctions exceeds two.
In the method for determining a fault of a check valve for a water supply facility, it is further preferable that step S32 further includes opening the water pump unit on the same power line as the faulty check valve to supply water normally after the faulty position of the check valve is located.
On the other hand, the invention also discloses a check valve fault judging system for water supply equipment, which is used for realizing the check valve fault judging method, and the check valve fault judging system comprises the following steps: the monitoring unit comprises a first pressure gauge and a second pressure gauge which are respectively arranged on the water inlet end and the water outlet end of the water supply equipment; the pressure release valve is arranged at the water inlet end of the water supply equipment; and the control unit is electrically connected with the water pump unit, the first pressure gauge, the second pressure gauge and the pressure release valve respectively.
In the check valve failure determination system for a water supply facility as described above, it is further preferable that the relief valve is an electromagnetic relief valve.
The check valve failure determination system for water supply equipment as described above, further preferably, the first pressure gauge and the second pressure gauge are electric pressure gauges or pressure transmitters.
In the check valve malfunction determination system for a water supply apparatus as described above, it is further preferable that the control unit includes: the driving unit is used for controlling the start and stop of the water pump unit and the pressure release valve; an acquisition unit for acquiring pressure data measured in the first pressure gauge and the second pressure gauge; the comparison unit is used for comparing the pressure data in the first pressure gauge with a preset threshold value and obtaining a comparison result; a result determination unit that sends an execution instruction to the drive unit based on the comparison result; and the counting unit is used for recording the starting and stopping times of the pressure relief valve and sending the starting and stopping times to the result judging unit.
In another aspect, the present invention further provides a water supply device, which includes the check valve failure determination system for a water supply device as described above, and is configured to implement any one of the check valve failure determination methods described above.
The method for judging the fault of the check valve for the water supply equipment disclosed by the invention firstly realizes fault judgment through the pressure value change of the water inlet end and the water outlet end of the water supply equipment when the check valve is in fault, secondly avoids secondary damage of water pressure to the water supply equipment by carrying out pressure relief on the water supply equipment, and thirdly realizes fault positioning of the check valve by acquiring the running pressure values of the water inlet end and the water outlet end of the water supply equipment by starting each power pipeline one by one. The method is simple and strong in operability, the position of the fault check valve can be positioned, secondary faults of equipment caused by the faults of the check valve can be avoided, water supply can be guaranteed after the check valve is damaged, and time is provided for maintenance personnel to maintain.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flowchart of a check valve malfunction determination method for a water supply apparatus according to the present invention;
FIG. 2 is a flow chart of the water shutoff valve fault type determination of FIG. 1;
FIG. 3 is a schematic view showing the construction of a water supply apparatus according to the present invention;
FIG. 4 is a schematic illustration of the non-faulted power line operating condition of FIG. 3;
FIG. 5 is a schematic view of the faulted power line operating condition of FIG. 3.
Description of reference numerals:
1-a pressure stabilizing tank, 2-a water pump unit, 3-a check valve, 4-a water inlet main pipe, 5-a water outlet main pipe, 6-a first pressure gauge, 7-a second pressure gauge, 8-a pressure relief valve and 9-an incoming water check valve.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the terms in the present invention can be understood in a specific case to those skilled in the art.
A check valve malfunction determination method and system for a water supply apparatus according to the present invention will be described with reference to fig. 1 to 5. Specifically, the check valve fault judgment method provided by the invention is mainly used in water supply equipment, wherein the water supply equipment comprises a plurality of power pipelines connected in parallel between a water inlet end and a water outlet end of the water supply equipment, the power pipelines are connected with a water pump unit 2 and a check valve 3, the water inlet end of the water supply equipment is connected with a water inlet main pipe and is communicated with a municipal pipe network through a water inlet main pipe 4 and a water inlet check valve 9 for water supply, the water outlet end of the water supply equipment is connected with a water outlet main pipe 5 and is communicated with a user pipe network through a water outlet main pipe for water removal supply, the water pump unit 2 is used for pressurizing incoming water in the water inlet main pipe 4 and conveying the incoming water to the water outlet main pipe 5 through the check valve 3 so as to realize the water supply for users, and the using number of the water pump units 2 is determined based on the user amount of the user pipe network. In addition, the water inlet end of the power pipeline in the water supply equipment is also provided with a steady flow tank arranged between the water inlet check valve 9 and the water pump unit 2 and used for supplying water for the water pump unit 2 in a steady pressure mode.
Specifically, as shown in fig. 1 to 5, the check valve failure determination method for a water supply device according to the present invention is mainly used for determining whether a check valve 3 on a power line fails, and specifically includes the following steps:
s1: acquiring a pressure value of a water inlet end of the water supply equipment during operation; if the pressure value in the water inlet end is increased and exceeds the preset pressure value, the water supply equipment has a fault of the check valve 3;
s2: closing all the water pump units 2, and releasing pressure of the water supply equipment until the pressure of the water inlet end is smaller than a preset pressure value;
s3: and independently starting the water pump units 2 in each power pipeline one by one under the same condition, and positioning the position of the fault check valve based on the running pressure value of the water inlet end of the water supply equipment.
In S1, the pressure value at the water inlet end of the water supply equipment is the pressure value of the surge tank 1, the pressure value at the water outlet end is the pressure value of the pipeline pressurized by the water pump unit 2, specifically, the pressure value at the water inlet end is P1, and the pressure value at the water outlet end is P2, and because the influence of the power pipeline stop return valve 3, P1 is less than P2 when the water supply equipment normally operates, as shown in fig. 3; however, if any one of the check valves 3 in the power pipeline fails, the high-pressure water at the water outlet end flows back to the water inlet end through the failed check valve 3, and further causes the pressure value P1 at the water outlet end to rise, as shown in fig. 4. Specifically, a preset pressure value P3 is set, under normal conditions, P1< P3< P2, and once the pressure value at the water inlet end is greater than the preset pressure value, that is, P1 is greater than or equal to P3, it is indicated that the check valve 3 of the water supply equipment fails.
In S2, once a fault occurs, all the water pump units 2 are first shut down, and the pressure relief processing is performed on the water supply equipment until the pressure value of the water inlet end returns to normal, that is, P1< P3. Mainly, step S2 is used for maintenance of the water supply equipment to avoid the returned high-pressure water from causing secondary damage to the pipeline of the water supply equipment.
S3 is used for determining a failure of the check valve 3 to confirm a failure state of the check valve 3, and specifically, S3 includes:
s31: starting the water pump unit 2 on one power pipeline independently, and recording pressure values in a water inlet end and a water outlet end;
s32: judging whether the pressure value of the water inlet end exceeds a preset threshold value, if not, judging that the check valve 3 on the currently started power pipeline breaks down, and finishing fault screening when the running condition of the water supply equipment is as shown in figure 5; if yes, continuing to perform the next step;
s33: releasing pressure of the water supply equipment until the pressure of the water inlet end is smaller than a preset pressure value;
s34: repeating S31-S33 until the failed check valve 3 is located, or all power lines are screened; if all the power lines are screened and the fault positions of the check valves 3 cannot be located, the number of the faults of the check valves 3 exceeds two.
Steps S31-S34 detail the failure determination step of the check valve 3 and the analysis of the determination result, and realize the positioning of the check valve 3 when a single check valve 3 fails, and give the determination result when at least two check valves 3 fail, for further maintenance.
Further, step S32 includes turning on the water pump assembly 2 on the corresponding power line to supply water normally after the fault position of the check valve 3 is located. Specifically, the judgment result corresponding to the step is that the single check valve 3 is in fault, and at the moment, normal water supply can be realized only by starting the water pump unit 2 on the power pipeline corresponding to the fault check valve 3, so that influence on use of a user is avoided.
Further, step S34 includes recording the pressure relief times of the water supply equipment, and determining whether the pressure relief times is greater than the number of the water pump units 2, if so, all power lines are screened, and if not, the opposite is performed. Of course, the counting may also be achieved by other methods, such as numbering the water pump units 2 in order and starting the water pump units 2 in the order of the numbering until the last numbering.
Further, step S34 includes performing shutdown maintenance on the water supply equipment when the number of the check valves 3 is more than two.
The embodiment also discloses a check valve failure judgment system for water supply equipment, which is used for realizing the check valve failure judgment method and comprises the following steps:
the monitoring unit comprises a first pressure gauge 6 arranged at the water inlet end of the water supply equipment and a second pressure gauge 7 arranged at the water outlet end of the water supply equipment;
the pressure release valve 8 is arranged at the water inlet end of the water supply equipment;
and the control unit is electrically connected with the water pump unit 2, the first pressure gauge 6, the second pressure gauge 7 and the pressure release valve 8 respectively.
The first pressure gauge 6 is used for monitoring the pressure of the water inlet end of the water supply equipment, and the second pressure gauge 7 is used for monitoring the pressure of the water outlet end of the water supply equipment; specifically, the first pressure gauge 6 and the second pressure gauge 7 are electric contact pressure gauges or pressure transmitters, and are used for converting pressure signals into electric signals and transmitting the electric signals to the control unit.
The pressure relief valve 8 is connected with the pressure stabilizing tank 1 and is used for performing pressure relief processing on the water supply equipment, the set action pressure of the pressure relief valve is a preset pressure value, and once the pressure value in the water supply equipment exceeds the set action pressure of the pressure relief valve, the pressure relief valve 8 starts to relieve pressure. In particular, the pressure relief valve 8 is an electromagnetic pressure relief valve 8 for starting and relieving pressure in the water supply apparatus under the control of the control unit.
The control unit is used for controlling to realize the check valve fault judging method, and specifically comprises the following steps:
the driving unit is used for controlling the start and stop of the water pump unit 2 and the pressure release valve 8;
an acquisition unit for acquiring pressure data measured in the first pressure gauge 6 and the second pressure gauge 7;
the comparison unit is used for comparing the pressure value of the first pressure gauge 6 acquired by the acquisition unit with a preset threshold value to obtain a comparison result;
and a result determination unit that sends an execution instruction to the drive unit based on the comparison result.
Further, the control unit further comprises a counting unit, and the counting unit is used for recording the starting and stopping times of the pressure release valve and sending the starting and stopping times to the result judging unit.
The check valve fault judgment method is realized by the mutual cooperation of the driving unit, the acquisition unit, the comparison unit, the result judgment unit and the counting unit.
The embodiment also discloses water supply equipment which comprises a check valve fault judgment system for the water supply equipment and can realize the check valve fault judgment method.
Specifically, taking the water supply device disclosed in fig. 3 as an example, the present embodiment also discloses a use method of the water supply device:
the water supply equipment comprises a steady flow tank and three power pipelines, wherein the water inlet end of the steady flow tank is connected with a water inlet main pipe and is communicated with a municipal pipe network through a water inlet main pipe 4 and a water inlet check valve 9, the three power pipelines are connected in parallel, one end of the three power pipelines is communicated with the steady flow tank, the other end of the three power pipelines is a water outlet end connected with a water outlet main pipe, the power pipelines are connected with a water pump unit 2 and a check valve 3, the water pump unit 2 is used for pressurizing incoming water in the steady flow tank and conveying the incoming water into the water outlet main pipe 5 through the check valve 3, and water supply for users is realized. And in order to realize the fault judgment of the check valve, the steady flow tank is provided with a first pressure gauge 6 and a pressure release valve 8 with a preset pressure value, the water outlet end is provided with a second pressure gauge 7, and the first pressure gauge 6, the pressure release valve 8, the second pressure gauge 7 and the water pump unit are all electrically connected with the controller. When the check valve on the power pipeline normally operates, the pressure data of the first pressure gauge is P1, the pressure value of the second pressure gauge is P2, the preset pressure value of the pressure relief valve is P3, and P1< P3< P2.
Once the check valve is in fault in the power pipeline, the high-pressure water pressurized by the water pump unit 2 flows back to the pressure stabilizing tank 1 through the fault check valve, so that the pressure in the pressure stabilizing tank 1 is increased, namely P1 is increased, once P1 is larger than or equal to P3, the pressure relief valve 8 starts to relieve the pressure, and meanwhile, the controller sends instructions to the three water pump units 2 to stop running at the same time. When the pressure in the surge tank 1 is restored below P3, the relief valve closes. The controller instructs the water pump unit 2 on the first power pipeline to start, if the pressure in the pressure stabilizing tank 1 is still increased to P1 not less than P3, as shown in FIG. 4, it indicates that a check valve fault exists on other power pipelines, the pressurized water flows back to the pressure stabilizing tank 1 through the fault check valve, at this time, the pressure relief valve 8 starts to relieve the pressure until the pressure in the pressure stabilizing tank 1 is recovered to be below P3, and simultaneously the controller sends an instruction to the water pump unit 2 to stop the operation; then, the controller starts the water pump set 2 on the second power line, and if the pressure in the surge tank 1 is not increasing, i.e., P1< P3, then as shown in fig. 5, it is described that there is a check valve failure on the power line, and the pressurized water cannot flow back through the check valves on the other power lines, and the location of the failed check valve is realized.
When each power pipeline is screened, namely the number of the starting and stopping times of the pressure release valve is larger than the number of the power pipelines, and the fault check valves cannot be positioned, the number of the fault check valves exceeds 1, namely the number of the fault check valves is two or more. At this point the water supply is shut down for servicing.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a check valve fault diagnosis method for water supply equipment, water supply equipment includes many parallelly connected power pipeline between its end of intaking and the end of play water, power pipeline all is connected with water pump unit and check valve, its characterized in that includes:
s1: acquiring a pressure value of a water inlet end of the water supply equipment during operation; if the pressure value of the water inlet end is increased and exceeds the preset pressure value, the water supply equipment has a fault of the check valve;
s2: closing all water pump units, and carrying out pressure relief treatment on the water supply equipment until the pressure of the water inlet end is smaller than a preset pressure value;
s3: and independently starting the water pump units in each power pipeline one by one under the same condition, and positioning the position of the fault check valve based on the running pressure value of the water inlet end of the water supply equipment.
2. The check valve malfunction determination method for a water supply apparatus according to claim 1, wherein S3 specifically includes:
s31: independently starting a water pump unit on one power pipeline, and recording pressure values in a water inlet end and a water outlet end;
s32: judging whether the pressure value of the water inlet end exceeds a preset threshold value, if not, judging that a check valve on the current power pipeline breaks down, and finishing fault screening; if yes, continuing to perform the next step;
s33: carrying out pressure relief treatment on the water supply equipment until the pressure of the water inlet end is smaller than a preset pressure value;
s34: repeating S31-S33 until the failed check valve is located, or all power lines are screened; if all the power pipelines pass through the screening and still cannot locate the fault position of the check valve, the number of the faults of the check valve exceeds two.
3. The method for judging the fault of the check valve of the water supply equipment according to claim 2, wherein the step S34 further comprises the steps of recording the pressure relief times after the fault of the water supply equipment occurs, and judging whether the pressure relief times are greater than the number of the water pump units, if so, all power pipelines are screened, and if not, the opposite is carried out.
4. The check valve malfunction determination method for a water supply apparatus according to claim 2, wherein the step S34 further comprises performing shutdown maintenance on the water supply apparatus when the number of check valve malfunctions exceeds two.
5. The check valve malfunction-judging method for a water supply apparatus according to claim 2, wherein the step S32 further comprises, after the malfunction position of the check valve is located, opening the water pump unit on the same power line as the malfunctioning check valve to normally supply water.
6. A check valve malfunction determination system for a water supply apparatus, for implementing the check valve malfunction determination method according to any one of claims 1 to 5, comprising:
the monitoring unit comprises a first pressure gauge arranged at the water inlet end of the water supply equipment;
the pressure release valve is arranged at the water inlet end of the water supply equipment;
and the control unit is electrically connected with the water pump unit, the first pressure gauge and the pressure release valve respectively.
7. The check valve malfunction determination system for a water supply apparatus according to claim 6, characterized in that the relief valve is an electromagnetic relief valve.
8. The check valve malfunction determination system for a water supply apparatus according to claim 6, wherein the first pressure gauge is an electric pressure gauge or a pressure transmitter.
9. The check valve malfunction determination system for a water supply apparatus according to claim 6, wherein the control unit includes:
the driving unit is used for controlling the start and stop of the water pump unit and the pressure release valve;
an acquisition unit for acquiring pressure data measured in the first pressure gauge;
the comparison unit is used for comparing the pressure value of the first pressure gauge acquired by the acquisition unit with a preset threshold value to obtain a comparison result;
a result determination unit that sends an execution instruction to the drive unit based on the comparison result;
and the counting unit is used for recording the starting and stopping times of the pressure relief valve and sending the starting and stopping times to the result judging unit.
10. A water supply apparatus, characterized by comprising the check valve malfunction judgment system for a water supply apparatus according to any one of claims 6 to 9 for implementing the check valve malfunction judgment method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111661645.6A CN114293623B (en) | 2021-12-30 | 2021-12-30 | Check valve fault judging method and system for water supply equipment and water supply equipment |
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| CN202111661645.6A CN114293623B (en) | 2021-12-30 | 2021-12-30 | Check valve fault judging method and system for water supply equipment and water supply equipment |
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| CN114293623A true CN114293623A (en) | 2022-04-08 |
| CN114293623B CN114293623B (en) | 2024-03-19 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003042089A (en) * | 2001-07-31 | 2003-02-13 | Sayama Seisakusho:Kk | Diagnostic method for check valve and/or pressure tank and water supplying device |
| JP2005098125A (en) * | 2003-09-22 | 2005-04-14 | Hitachi Unisia Automotive Ltd | Diagnostic equipment of air supply device |
| CN105840480A (en) * | 2016-05-24 | 2016-08-10 | 史仁朋 | Closed type four-stage series-parallel connection pump station system and control method thereof |
| CN106151004A (en) * | 2016-07-30 | 2016-11-23 | 陈辉 | A kind of water-aspirator pressure surge tank fault detection method and water pump |
| JP2020002788A (en) * | 2018-06-25 | 2020-01-09 | 株式会社川本製作所 | Water supply device |
| CN213022277U (en) * | 2020-07-29 | 2021-04-20 | 上海连成环境工程设备有限公司 | Check valve failure detection device |
-
2021
- 2021-12-30 CN CN202111661645.6A patent/CN114293623B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003042089A (en) * | 2001-07-31 | 2003-02-13 | Sayama Seisakusho:Kk | Diagnostic method for check valve and/or pressure tank and water supplying device |
| JP2005098125A (en) * | 2003-09-22 | 2005-04-14 | Hitachi Unisia Automotive Ltd | Diagnostic equipment of air supply device |
| CN105840480A (en) * | 2016-05-24 | 2016-08-10 | 史仁朋 | Closed type four-stage series-parallel connection pump station system and control method thereof |
| CN106151004A (en) * | 2016-07-30 | 2016-11-23 | 陈辉 | A kind of water-aspirator pressure surge tank fault detection method and water pump |
| JP2020002788A (en) * | 2018-06-25 | 2020-01-09 | 株式会社川本製作所 | Water supply device |
| CN213022277U (en) * | 2020-07-29 | 2021-04-20 | 上海连成环境工程设备有限公司 | Check valve failure detection device |
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| Publication number | Publication date |
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| CN114293623B (en) | 2024-03-19 |
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