CN112880000A - Fault diagnosis and alarm method for automatic water replenishing and constant pressure system of secondary network of heat exchange unit - Google Patents
Fault diagnosis and alarm method for automatic water replenishing and constant pressure system of secondary network of heat exchange unit Download PDFInfo
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 16
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- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000003020 moisturizing effect Effects 0.000 description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
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Abstract
The invention provides a fault diagnosis and alarm method for an automatic water-replenishing constant-pressure system of a secondary network of a heat exchange unit, which relates to the technical field of heat supply pipe networks and comprises the following steps: setting a continuous operation time threshold of a water replenishing pump, setting upper and lower limits of a secondary water return pressure threshold, and acquiring operation state information of a circulating pump; and if the circulating pump is in the running state, obtaining the running state of the water replenishing pump, the accumulated flow of the water replenishing meter and the secondary water return pressure, and diagnosing the fault of the pipe network based on the comparison between the running state of the water replenishing pump, the accumulated flow of the water replenishing meter and the secondary water return pressure and the corresponding threshold values. The method provided by the invention can prevent the risk of the pipe network and ensure the stable operation of the heating system.
Description
Technical Field
The invention relates to the technical field of heat supply pipe networks, in particular to a fault diagnosis and alarm method for an automatic water-replenishing constant-pressure system of a secondary network of a heat exchange unit.
Background
The secondary circuit of the heat exchange unit of the centralized heat supply pipe network generally adopts an automatic constant pressure mode and constant pressure of a water replenishing pump so as to meet the operating condition, when the secondary circuit loses pressure due to leakage and the like and is lower than the lower limit of the constant pressure value of the water replenishing pump, the water replenishing pump automatically starts to replenish water into the pipe network, and when the constant pressure value of the water replenishing pump is reached, the water replenishing pump automatically stops replenishing water into the pipe network. If automatic moisturizing level pressure system breaks down, then can't in time to the pipe network in moisturizing, directly lead to hot water can't supply corresponding floor, cause hot user's room temperature to hang down on the low side, more serious, lead to water pressure to be less than circulating pump operating pressure low limit, cause the non-meter of circulating pump to stop, influence the normal heat supply in whole district. In addition, if the secondary network leaks, the water replenishing pump continuously replenishes water, which causes unnecessary waste of heat and water, and if the secondary network leaks, the water replenishing pump still does not replenish water, which further increases the risk of life and property loss of people, such as flooding elevators and other electrical equipment. Accurate and rapid fault diagnosis and alarm have great effect on safe and stable operation of a secondary network heating system. The traditional fault diagnosis is mainly based on the water loss amount within a certain time or the field patrol finding, such as secondary network leakage, air accumulation of a water replenishing pump, circuit faults of a water replenishing system and the like, the requirements on the technical level, the working experience and the responsibility of personnel are high, and the problems are often found only after being completely exposed. With the increase of heat exchange units year by year, the aging of pipe network equipment year by year, the frequent occurrence of various faults such as pipe network leakage, air trapping of a water replenishing pump and the like, the inspection is performed one by one only by manpower, the efficiency is low and lagged, the abnormal conditions are difficult to find timely and accurately, and further certain inevitable losses or faults are caused, such as the damage of a water replenishing pump mechanical device caused by long-time air trapping, the equipment flooding caused by long-time leakage and the like, and the safe and stable operation of a heat supply system cannot be guaranteed.
Disclosure of Invention
In view of the above, the present invention provides a method for diagnosing and alarming a fault of an automatic water-replenishing pressure-fixing system of a secondary network of a heat exchanger unit, so as to prevent risks in the network and ensure stable operation of a heating system.
The embodiment of the invention provides a fault diagnosis and alarm method for a secondary network automatic water supply constant pressure system of a heat exchange unit, which comprises the following steps:
setting a continuous operation time threshold of a water replenishing pump, setting upper and lower limits of a secondary water return pressure threshold, and acquiring operation state information of a circulating pump;
and if the circulating pump is in the running state, obtaining the running state of a water supplementing pump, the accumulated flow of a water supplementing meter and the secondary water return pressure, and diagnosing the fault of the pipe network based on the comparison of the running state of the water supplementing pump, the accumulated flow of the water supplementing meter and the secondary water return pressure with the corresponding threshold values.
Preferably, the step of setting the threshold and acquiring the information of the operation state of the circulation pump further includes:
and if the circulating pump is in a stop operation state, acquiring the operation state of the water replenishing pump and the secondary water return pressure, and diagnosing the fault of the pipe network based on the comparison between the operation state of the water replenishing pump and the threshold lower limit of the secondary water return pressure.
Preferably, the step of acquiring the running state of the water replenishing pump, the accumulated flow of the water replenishing meter and the secondary water return pressure, and diagnosing the pipe network fault based on the comparison between the running state of the water replenishing pump, the accumulated flow of the water replenishing meter and the secondary water return pressure with the corresponding threshold value comprises:
judging whether the water replenishing pump is in an operating state or not based on the operating state of the water replenishing pump;
if the water replenishing pump is not in the running state, judging whether the accumulated flow of the water replenishing meter is increased, if so, judging that the pipeline behind the water replenishing meter has a leakage risk;
if not, judging whether the secondary backwater pressure exceeds the upper limit and the lower limit of the set threshold value,
if the secondary return water pressure exceeds the lower threshold, judging that a water supplementing pump control system has a fault or the water supplementing tank is lack of water;
and if the secondary water return pressure exceeds the upper limit of the threshold value, judging that the safety valve has a fault and a leakage risk.
Preferably, the step of determining whether the water replenishing pump is in the operating state based on the operating state of the water replenishing pump includes:
if the water replenishing pump is in an operating state, judging whether the secondary water return pressure exceeds a threshold value;
if the secondary return water pressure value exceeds the upper limit of the threshold value, judging that the control loop of the water replenishing pump has a fault;
if the secondary backwater pressure value is lower than the lower threshold, acquiring whether the accumulated flow of the water replenishing meter is increased after the water replenishing pump operates;
if yes, judging that the pipe network has a leakage risk;
if not, judging that the air pocket risk exists in the water replenishing pump.
Preferably, the step of judging whether the secondary water return pressure exceeds the threshold further includes:
if the water replenishing pump is in an operating state, judging whether the secondary water return pressure exceeds a threshold value;
if the secondary backwater pressure value is within the threshold range, judging whether the continuous operation time of the water replenishing pump exceeds a set threshold;
if yes, judging whether the accumulated flow of the water replenishing meter is increased or not;
if the leakage is increased, judging that the pipe network has leakage;
if not, judging that the air pocket exists in the water replenishing pump.
Preferably, the step of obtaining the operation state of the water replenishing pump and the secondary water return pressure and determining the pipe network fault based on the operation state of the water replenishing pump and the secondary water return pressure comprises:
judging whether the secondary water return pressure is within the upper and lower limits of a secondary water return pressure threshold value;
if the secondary water return pressure is within the upper limit and the lower limit of the secondary water return pressure threshold value, judging that the circulating pump system has a fault;
and if the secondary water return pressure is not within the upper limit and the lower limit of the secondary water return pressure threshold, judging whether the water replenishing pump operates.
Preferably, the step of determining whether the water replenishing pump is operated includes:
if so, judging that the pipe network has leakage or the water replenishing pump has air pocket risk;
if not, judging that the water replenishing pump has the control loop fault risk.
The embodiment of the invention has the following beneficial effects: the invention provides a fault diagnosis and alarm method for a secondary network automatic water supply constant pressure system of a heat exchange unit, which comprises the following steps: setting a continuous operation time threshold of a water replenishing pump, setting upper and lower limits of a secondary water return pressure threshold, and acquiring operation state information of a circulating pump; and if the circulating pump is in the running state, obtaining the running state of the water replenishing pump, the accumulated flow of the water replenishing meter and the secondary water return pressure, and diagnosing the fault of the pipe network based on the comparison between the running state of the water replenishing pump, the accumulated flow of the water replenishing meter and the secondary water return pressure and the corresponding threshold values. . The method provided by the invention can prevent the risk of the pipe network and ensure the stable operation of the heating system.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
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 structural diagram of an automatic water replenishing and pressure stabilizing system of a secondary network of a heat exchanger unit according to an embodiment of the present invention;
fig. 2 is a flow chart of a fault diagnosis and alarm method for an automatic water replenishing and pressure stabilizing system of a secondary network of a heat exchanger unit according to an embodiment of the invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent 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.
At present, according to the traditional fault diagnosis, a plurality of faults are found according to water loss or on-site patrol within a certain time, such as secondary network leakage, air accumulation of a water replenishing pump, circuit faults of a water replenishing system and the like, the requirements on the technical level, working experience and responsibility of personnel are high, and the problems are often found after the problems are completely exposed.
In order to facilitate understanding of the embodiment, a fault diagnosis and alarm method for an automatic water replenishing and pressure stabilizing system of a secondary network of a heat exchanger unit disclosed by the embodiment of the invention is firstly described in detail.
The first embodiment is as follows:
the invention provides a fault diagnosis and alarm method for a secondary network automatic water supply constant pressure system of a heat exchange unit, which comprises the following steps: setting a continuous operation time threshold of a water replenishing pump, setting upper and lower limits of a secondary water return pressure threshold, and acquiring operation state information of a circulating pump;
and if the circulating pump is in the running state, obtaining the running state of a water supplementing pump, the accumulated flow of a water supplementing meter and the secondary water return pressure, and diagnosing the fault of the pipe network based on the comparison of the running state of the water supplementing pump, the accumulated flow of the water supplementing meter and the secondary water return pressure with the corresponding threshold values.
Preferably, the step of setting the threshold and acquiring the information of the operation state of the circulation pump further includes:
and if the circulating pump is in a stop operation state, acquiring the operation state of the water replenishing pump and the secondary water return pressure, and diagnosing the fault of the pipe network based on the comparison between the operation state of the water replenishing pump and the threshold lower limit of the secondary water return pressure.
Preferably, the step of acquiring the running state of the water replenishing pump, the accumulated flow of the water replenishing meter and the secondary water return pressure, and diagnosing the pipe network fault based on the comparison between the running state of the water replenishing pump, the accumulated flow of the water replenishing meter and the secondary water return pressure with the corresponding threshold value comprises:
judging whether the water replenishing pump is in an operating state or not based on the operating state of the water replenishing pump;
if the water replenishing pump is not in the running state, judging whether the accumulated flow of the water replenishing meter is increased, if so, judging that the pipeline behind the water replenishing meter has a leakage risk;
if not, judging whether the secondary backwater pressure exceeds the upper limit and the lower limit of the set threshold value,
if the secondary return water pressure exceeds the lower threshold, judging that a water supplementing pump control system has a fault or the water supplementing tank is lack of water;
and if the secondary water return pressure exceeds the upper limit of the threshold value, judging that the safety valve has a fault and a leakage risk.
Preferably, the step of determining whether the water replenishing pump is in the operating state based on the operating state of the water replenishing pump includes:
if the water replenishing pump is in an operating state, judging whether the secondary water return pressure exceeds a threshold value;
if the secondary return water pressure value exceeds the upper limit of the threshold value, judging that the control loop of the water replenishing pump has a fault;
further, remote outage of the make-up pump may be recommended;
if the secondary backwater pressure value is lower than the lower threshold, acquiring whether the accumulated flow of the water replenishing meter is increased after the water replenishing pump operates;
if yes, judging that the pipe network has a leakage risk;
furthermore, the circulation pump and the water replenishing pump are suggested to be stopped;
if not, judging that the air pocket risk exists in the water replenishing pump.
Further, it is recommended to stop the circulating pump and make-up water pump
Preferably, the step of judging whether the secondary water return pressure exceeds the threshold further includes:
if the water replenishing pump is in an operating state, judging whether the secondary water return pressure exceeds a threshold value;
if the secondary backwater pressure value is within the threshold range, judging whether the continuous operation time of the water replenishing pump exceeds a set threshold;
if yes, judging whether the accumulated flow of the water replenishing meter is increased or not;
if the leakage is increased, judging that the pipe network has leakage;
further, the staff is advised to carry out site investigation;
if not, judging that the air pocket exists in the water replenishing pump.
Preferably, the step of obtaining the operation state of the water replenishing pump and the secondary water return pressure and determining the pipe network fault based on the operation state of the water replenishing pump and the secondary water return pressure comprises:
judging whether the secondary water return pressure is within the upper and lower limits of a secondary water return pressure threshold value;
if the secondary water return pressure is within the upper limit and the lower limit of the secondary water return pressure threshold value, judging that the circulating pump system has a fault;
and if the secondary water return pressure is not within the upper limit and the lower limit of the secondary water return pressure threshold, judging whether the water replenishing pump operates.
Preferably, the step of determining whether the water replenishing pump is operated includes:
if so, judging that the pipe network has leakage or the water replenishing pump has air pocket risk;
further, it is recommended to stop the water replenishing pump remotely.
If not, judging that the water replenishing pump has the control loop fault risk.
The invention has the following advantages:
1) in the embodiment provided by the invention, the fault of the pipe network can be timely alarmed, the pipe network is prevented from being manually detected in the prior art, and the intelligent degree of a pipe network monitoring system is improved.
2) In the embodiment provided by the invention, the fault of the pipe network can be timely alarmed, so that the pipe network is prevented from being manually detected in the prior art, and the safety of a pipe network monitoring system is improved;
3) the fault diagnosis alarm platform captures 4 groups of circulating pump running state, water replenishing pump running state, secondary constant pressure point pressure value and water replenishing meter flow in real-time running parameters of the heat exchange unit, periodically analyzes the four groups of data, and obtains corresponding diagnosis results through the front and back change conditions and relations of the data, wherein the fault diagnosis results mainly comprise: the air in the water replenishing pump is trapped, the secondary network generally loses water, the secondary network seriously loses water, the pressure exceeds the high limit, the pressure exceeds the low limit, the water replenishing pump control loop fails, the water tank lacks water, the failure caused by unknown reasons and the like;
4) and transmitting the diagnosed fault and the conventional processing method to a mobile phone APP of an appointed receiver in the form of short messages or dialing voice so as to guide the working personnel to make corresponding decisions in time and carry out emergency maintenance and defect elimination.
In conclusion, the method has the advantages of strong timeliness, high accuracy and low cost, can ensure the safe and stable operation of the heat supply pipe network to the maximum extent, reduces the occurrence of accidents and reduces the loss caused by the accidents.
Unless specifically stated otherwise, the relative steps, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
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.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A fault diagnosis and alarm method for a secondary network automatic water supply constant pressure system of a heat exchange unit is characterized by comprising the following steps:
setting a continuous operation time threshold of a water replenishing pump, setting upper and lower limits of a secondary water return pressure threshold, and acquiring operation state information of a circulating pump;
and if the circulating pump is in the running state, obtaining the running state of a water supplementing pump, the accumulated flow of a water supplementing meter and the secondary water return pressure, and diagnosing the fault of the pipe network based on the comparison of the running state of the water supplementing pump, the accumulated flow of the water supplementing meter and the secondary water return pressure with the corresponding threshold values.
2. The method of claim 1, wherein the step of setting a threshold and obtaining circulation pump operating status information further comprises:
and if the circulating pump is in a stop operation state, acquiring the operation state of the water replenishing pump and the secondary water return pressure, and diagnosing the fault of the pipe network based on the comparison between the operation state of the water replenishing pump and the threshold lower limit of the secondary water return pressure.
3. The method of claim 1, wherein the step of obtaining the operational status of the water replenishing pump, the cumulative flow of the water replenishing meter, and the secondary water return pressure, and diagnosing the pipe network fault based on the comparison of the operational status of the water replenishing pump, the cumulative flow of the water replenishing meter, and the secondary water return pressure with the corresponding thresholds comprises:
judging whether the water replenishing pump is in an operating state or not based on the operating state of the water replenishing pump;
if the water replenishing pump is not in the running state, judging whether the accumulated flow of the water replenishing meter is increased or not,
if yes, judging that the pipeline has a leakage risk behind the water replenishing meter;
if not, judging whether the secondary backwater pressure exceeds the upper limit and the lower limit of the set threshold value,
if the secondary return water pressure exceeds the lower threshold, judging that a water supplementing pump control system has a fault or the water supplementing tank is lack of water;
and if the secondary water return pressure exceeds the upper limit of the threshold value, judging that the safety valve has a fault and a leakage risk.
4. The method of claim 3, wherein the step of determining whether the make-up pump is in operation based on the make-up pump operating condition comprises:
if the water replenishing pump is in an operating state, judging whether the secondary water return pressure exceeds a threshold value;
if the secondary return water pressure value exceeds the upper limit of the threshold value, judging that the control loop of the water replenishing pump has a fault;
if the secondary backwater pressure value is lower than the lower threshold, acquiring whether the accumulated flow of the water replenishing meter is increased after the water replenishing pump operates;
if yes, judging that the pipe network has a leakage risk;
if not, judging that the air pocket risk exists in the water replenishing pump.
5. The method of claim 4, wherein the step of determining whether the secondary return water pressure exceeds a threshold further comprises:
if the water replenishing pump is in an operating state, judging whether the secondary water return pressure exceeds a threshold value;
if the secondary backwater pressure value is within the threshold range, judging whether the continuous operation time of the water replenishing pump exceeds a set threshold;
if yes, judging whether the accumulated flow of the water replenishing meter is increased or not;
if the leakage is increased, judging that the pipe network has leakage;
if not, judging that the air pocket exists in the water replenishing pump.
6. The method according to claim 2, wherein the step of obtaining the operation state of the water-replenishing pump and the secondary water return pressure, and determining the pipe network fault based on the operation state of the water-replenishing pump and the secondary water return pressure comprises:
judging whether the secondary water return pressure is within the upper and lower limits of a secondary water return pressure threshold value;
if the secondary water return pressure is within the upper limit and the lower limit of the secondary water return pressure threshold value, judging that the circulating pump system has a fault;
and if the secondary water return pressure is not within the upper limit and the lower limit of the secondary water return pressure threshold, judging whether the water replenishing pump operates.
7. The method of claim 6, wherein the step of determining whether the make-up pump is operating comprises:
if so, judging that the pipe network has leakage or the water replenishing pump has air pocket risk;
if not, judging that the water replenishing pump has the control loop fault risk.
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| CN114439737A (en) * | 2022-01-13 | 2022-05-06 | 广东美的暖通设备有限公司 | Control method and device of water pump, storage medium, liquid cooling unit and refrigeration system |
| CN114565315A (en) * | 2022-03-10 | 2022-05-31 | 西安热工研究院有限公司 | Method and system for judging closing state of circulating water pump on line, electronic equipment and storage medium |
| CN116184903A (en) * | 2023-02-28 | 2023-05-30 | 天津市津安热电有限公司 | Early warning system and method applied to abnormal operation of heating system |
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