A method for monitoring the level of an electric boiler

Abstract

The application provides an electric boiler liquid level monitoring method, and the electric boiler comprises a boiler inner cylinder, and comprises the following steps: step S101, a first liquid level meter and a second liquid level meter are symmetrically arranged on opposite sides of the boiler inner cylinder; step S102, when the electric boiler is running, the first liquid level meter measures the liquid level of the boiler inner cylinder for the first time to obtain a first measurement value; the second liquid level meter measures the liquid level of the boiler inner cylinder for the first time to obtain a second measurement value; and step S103, an electric boiler liquid level value is determined according to the first measurement value and the second measurement value obtained by the first measurement. One technical effect of the application is that the design is reasonable, the electric boiler liquid level value can be accurately measured, and the safe and stable operation of the electric boiler is ensured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of nuclear power plants, and particularly relates to a method for monitoring the liquid level of an electric boiler. BACKGROUND

[0002] A nuclear power plant is provided with an auxiliary electric boiler system, which adopts a high-voltage electrode boiler to ensure the steam demand during the startup and emergency shutdown of a unit. The electric boiler is provided with an inner cylinder liquid level meter for monitoring the liquid level of the inner cylinder of the boiler, and the power of the electric boiler is adjusted according to the height of the liquid in the inner cylinder. During the operation of the electric boiler, the graphite electrode located above the inner cylinder liquid level meter will have graphite powder falling off and jamming the inner cylinder liquid level meter due to wear, resulting in the inconsistency between the actual liquid level of the inner cylinder and the liquid level displayed by the inner cylinder liquid level meter, and further causing the failure of the monitoring of the liquid level of the inner cylinder, so that the actual power of the electric boiler cannot be accurately controlled, which endangers the safe and stable operation of the electric boiler. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art, and provides a new technical solution for a method for monitoring the liquid level of an electric boiler.

[0004] According to one aspect of the present application, a method for monitoring the liquid level of an electric boiler is provided, the electric boiler comprising an inner cylinder of the boiler, and comprising the following steps:

[0005] Step S101, symmetrically arranging a first liquid level meter and a second liquid level meter on opposite sides of the inner cylinder of the boiler;

[0006] Step S102, during the operation of the electric boiler, the first liquid level meter measures the liquid level of the inner cylinder of the boiler for the first time to obtain a first measurement value, and the second liquid level meter measures the liquid level of the inner cylinder of the boiler for the first time to obtain a second measurement value;

[0007] Step S103, determining the electric boiler liquid level value according to the first measurement value and the second measurement value obtained by the first measurement.

[0008] Optionally, obtaining the electric boiler liquid level value according to the first measurement value and the second measurement value obtained by the first measurement comprises:

[0009] If the difference between the first measurement value and the second measurement value is outside a preset range, calibrating the first liquid level meter and / or the second liquid level meter until the difference between the first measurement value and the second measurement value is within the preset range;

[0010] If the difference between the first measurement value and the second measurement value is within the preset range, determining the larger value between the first measurement value and the second measurement value as the electric boiler liquid level value.

[0011] Optionally, the preset range is 5%.

[0012] Optionally, the first liquid level meter sends the first measurement value to the controller, and the second liquid level meter sends the second measurement value to the controller.

[0013] The controller determines the electric boiler liquid level value according to the first measurement value and the second measurement value and sends the value to the boiler control system.

[0014] Optionally, the first liquid level meter and / or the second liquid level meter is calibrated, including:

[0015] The first liquid level meter and / or the second liquid level meter is calibrated by flushing.

[0016] Optionally, the first liquid level meter is provided with a first flushing assembly for flushing the first liquid level meter, and the second liquid level meter is provided with a second flushing assembly for flushing the second liquid level meter.

[0017] The first flushing assembly and the second flushing assembly are respectively connected with the controller, and the controller controls the first flushing assembly and the second flushing assembly according to the first measurement value and the second measurement value.

[0018] Optionally, if the difference between the first measurement value and the second measurement value is out of a preset range, the first liquid level meter and / or the second liquid level meter is calibrated, including:

[0019] If the first measurement value is higher than the second measurement value and the difference between the first measurement value and the second measurement value is out of the preset range, the second flushing assembly is started to flush the second liquid level meter.

[0020] If the first measurement value is lower than the second measurement value and the difference between the first measurement value and the second measurement value is out of the preset range, the first flushing assembly is started to flush the first liquid level meter.

[0021] Optionally, after the first liquid level meter or the second liquid level meter is flushed, the first liquid level meter measures the liquid level of the boiler inner cylinder for the second time to obtain a first measurement value, and the second liquid level meter measures the liquid level of the boiler inner cylinder for the second time to obtain a second measurement value.

[0022] The electric boiler liquid level value is determined according to the first measurement value and the second measurement value obtained by the second measurement.

[0023] Optionally, the electric boiler liquid level value is determined according to the first measurement value and the second measurement value obtained by the second measurement, including:

[0024] If the difference between the first measurement value and the second measurement value is out of the preset range, calibrate the one of the first liquid level meter and the second liquid level meter which is not flushed until the difference between the first measurement value and the second measurement value is within the preset range;

[0025] If the difference between the first measurement value and the second measurement value is within the preset range, determine the larger value between the first measurement value and the second measurement value as the electric boiler liquid level value.

[0026] Optionally, after the flushing of the first liquid level meter and the second liquid level meter is completed, the first liquid level meter measures the liquid level of the boiler inner cylinder for the third time to obtain a first measurement value, and the second liquid level meter measures the liquid level of the boiler inner cylinder for the third time to obtain a second measurement value.

[0027] The electric boiler liquid level value is determined according to the first measurement value and the second measurement value obtained by the third measurement.

[0028] One technical effect of the present application is that:

[0029] In the embodiment of the present application, the first liquid level meter and the second liquid level meter are symmetrically arranged on opposite sides of the boiler inner cylinder. When the electric boiler is running, the first liquid level meter measures the liquid level of the boiler inner cylinder for the first time to obtain a first measurement value, and the second liquid level meter measures the liquid level of the boiler inner cylinder for the first time to obtain a second measurement value. The electric boiler liquid level value is determined according to the first measurement value and the second measurement value obtained by the first measurement.

[0030] Therefore, the electric boiler liquid level monitoring method provided by the present application is reasonable in design and can accurately measure the electric boiler liquid level value, so as to accurately control the actual power of the electric boiler and ensure the safe and stable operation of the electric boiler. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The figure is a flowchart of an electric boiler liquid level monitoring method according to an embodiment of the present application;

[0032] Figure 2 The figure is a structural schematic diagram of a first liquid level meter, a second liquid level meter and a boiler inner cylinder according to an embodiment of the present application;

[0033] Figure 3 The figure is a signal transmission schematic diagram of a controller according to an embodiment of the present application.

[0034] In the figure: 1, first liquid level meter; 2, second liquid level meter; 3, boiler inner cylinder; 4, controller; 5, first input signal; 6, second input signal; 7, output signal. DETAILED DESCRIPTION

[0035] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps set forth in the embodiments, the numerical expressions, and numerical values set forth in the embodiments are not limiting to the scope of the present application unless specifically stated otherwise.

[0036] Embodiments of the present application will be described below in detail, examples of which are shown in the accompanying drawings, in which the same or similar components or components having the same or similar functions are denoted throughout by the same or similar reference numerals. The embodiments described below by reference to the accompanying drawings are exemplary and are for the purpose of explanation of the present application only and are not to be understood as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0037] The terms "first", "second" in the description and claims of the present application can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In the description of the present application, it should be noted that unless otherwise specifically stated and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] As Figure 1As shown, the embodiment of the present application provides an electric boiler liquid level monitoring method, the electric boiler comprises a boiler inner cylinder 3, which is used for accurately monitoring the electric boiler liquid level, so as to accurately control the actual power of the electric boiler and ensure the safe and stable operation of the electric boiler.

[0041] Specifically, the electric boiler liquid level monitoring method comprises the following steps:

[0042] Step S101, the first liquid level meter 1 and the second liquid level meter 2 are symmetrically arranged on opposite sides of the boiler inner cylinder 3.

[0043] It should be noted that the first liquid level meter 1 and the second liquid level meter 2 are located at the same height of the boiler inner cylinder 3, and the measurement values of the first liquid level meter 1 and the second liquid level meter 2 are the same when both of them are in a normal state.

[0044] In a specific embodiment, one first liquid level meter 1 and one second liquid level meter 2 are arranged oppositely as a measurement group, and a plurality of measurement values can be arranged along the circumference of the boiler inner cylinder 3, and then the plurality of measurement values are compared and analyzed, so as to realize real-time and accurate monitoring of the electric boiler liquid level.

[0045] Step S102, when the electric boiler is running, the first liquid level meter 1 measures the liquid level of the boiler inner cylinder 3 for the first time to obtain a first measurement value; and the second liquid level meter 2 measures the liquid level of the boiler inner cylinder 3 for the first time to obtain a second measurement value.

[0046] Since the first measurement value and the second measurement value are compared and analyzed, the liquid level value of the boiler inner cylinder 3 can be accurately determined, the fault of the liquid level meter in the prior art is avoided to cause the liquid level value of the boiler inner cylinder 3 to be measured incorrectly, and then the actual power of the electric boiler cannot be accurately controlled, which endangers the safe and stable operation of the electric boiler.

[0047] Step S103, determining the electric boiler liquid level value according to the first measurement value and the second measurement value obtained by the first measurement.

[0048] Therefore, the electric boiler liquid level monitoring method provided by the present application is reasonable in design, can accurately measure the electric boiler liquid level value, can accurately control the actual power of the electric boiler, and ensures the safe and stable operation of the electric boiler.

[0049] Optionally, the electric boiler liquid level value is obtained according to the first measurement value and the second measurement value obtained by the first measurement, comprising:

[0050] If the difference between the first measurement value and the second measurement value is out of the preset range, the first liquid level meter 1 and / or the second liquid level meter 2 is calibrated until the difference between the first measurement value and the second measurement value is within the preset range.

[0051] If the difference between the first measurement value and the second measurement value is within a preset range, the larger value between the first measurement value and the second measurement value is determined as the electric boiler liquid level value.

[0052] In the above embodiment, if the difference between the first measurement value and the second measurement value is within a preset range, it indicates that the first liquid level meter 1 and the second liquid level meter 2 are both not malfunctioning, and the measurement results are relatively accurate. At this time, the larger value between the first measurement value and the second measurement value is determined as the electric boiler liquid level value, which is helpful for safely and accurately controlling the actual power of the electric boiler according to the electric boiler liquid level value, and ensuring the safe and stable operation of the electric boiler.

[0053] Optionally, the preset range is 5%. The preset range is relatively reasonable, which is helpful for avoiding that the reasonable measurement error of the first liquid level meter 1 and the second liquid level meter 2 has a greater impact on the measurement results, and is helpful for quickly outputting the electric boiler liquid level value.

[0054] Optionally, referring to Figure 2 and Figure 3 , the first liquid level meter 1 sends the first measurement value to the controller 4, and the second liquid level meter 2 sends the second measurement value to the controller 4.

[0055] The controller 4 determines the electric boiler liquid level value according to the first measurement value and the second measurement value and sends it to the boiler control system.

[0056] In the above embodiment, the first measurement value is sent to the controller 4 as the first input signal 5, and the second measurement value is sent to the controller 4 as the second input signal 6. The controller 4 determines the output signal 7 according to the first input signal 5 and the second input signal 6 and sends the output signal 7 to the boiler control system, wherein the output signal 7 is the electric boiler liquid level value. The first liquid level meter 1, the second liquid level meter 2 and the controller 4 cooperate with each other to accurately obtain the electric boiler liquid level value, so as to accurately control the actual power of the electric boiler according to the electric boiler liquid level value.

[0057] Optionally, the first liquid level meter 1 and / or the second liquid level meter 2 are calibrated, including:

[0058] The first liquid level meter 1 and / or the second liquid level meter 2 are calibrated by flushing.

[0059] In the above embodiment, the first liquid level meter 1 or the second liquid level meter 2 is calibrated by flushing, which is a relatively simple calibration method, and can effectively remove the graphite powder of the jammed liquid level meter, thereby ensuring the accuracy of the measurement results of the first liquid level meter 1 or the second liquid level meter 2.

[0060] Optionally, the first liquid level meter 1 is provided with a first flushing assembly for flushing the first liquid level meter 1; the second liquid level meter 2 is provided with a second flushing assembly for flushing the second liquid level meter 2.

[0061] The first flushing assembly and the second flushing assembly are connected with the controller 4, and the controller 4 controls the first flushing assembly and the second flushing assembly according to the first measurement value and the second measurement value.

[0062] For example, the first flushing assembly comprises a first flushing head, a first connecting pipe and a first water pump. The first flushing head is arranged on the first liquid level meter 1 and is used for flushing the first liquid level meter 1 to completely remove the graphite powder that causes the first liquid level meter 1 to stick. One end of the first connecting pipe is connected with the first flushing head, and the other end is connected with the first water pump. The first water pump is connected with the controller 4 and is used for pumping flushing water to the first flushing head under the control of the controller 4 to flush the first liquid level meter 1.

[0063] For another example, the second flushing assembly comprises a second flushing head, a second connecting pipe and a second water pump. The second flushing head is arranged on the second liquid level meter 2 and is used for flushing the second liquid level meter 2 to completely remove the graphite powder that causes the second liquid level meter 2 to stick. One end of the second connecting pipe is connected with the second flushing head, and the other end is connected with the second water pump. The second water pump is connected with the controller 4 and is used for pumping flushing water to the second flushing head under the control of the controller 4 to flush the second liquid level meter 2.

[0064] In the above embodiment, the first flushing assembly can better flush the first liquid level meter 1, remove the graphite powder that causes the first liquid level meter 1 to stick, and ensure the accuracy of the measurement result of the first liquid level meter 1. Meanwhile, the second flushing assembly can better flush the second liquid level meter 2, remove the graphite powder that causes the second liquid level meter 2 to stick, and ensure the accuracy of the measurement result of the second liquid level meter 2.

[0065] In addition, the controller 4 can accurately control whether the first flushing assembly flushes the first liquid level meter 1 according to the measurement result of the first liquid level meter 1, and can accurately control whether the second flushing assembly flushes the second liquid level meter 2 according to the measurement result of the second liquid level meter 2. The control mode is relatively simple, and the first liquid level meter 1 and the second liquid level meter 2 can be calibrated simply, quickly and accurately. The operation is simple, which is helpful for accurately measuring the liquid level value of the electric boiler.

[0066] Optionally, if the difference between the first measurement value and the second measurement value is out of a preset range, the first liquid level meter 1 and / or the second liquid level meter 2 is calibrated, comprising:

[0067] if the first measurement value is higher than the second measurement value and the difference between the first measurement value and the second measurement value is outside the preset range, starting the second flushing assembly and flushing the second liquid level meter 2;

[0068] if the first measurement value is lower than the second measurement value and the difference between the first measurement value and the second measurement value is outside the preset range, starting the first flushing assembly and flushing the first liquid level meter 1.

[0069] In the above embodiment, when the difference between the first measurement value and the second measurement value is outside the preset range, it indicates that at least one of the first liquid level meter 1 and the second liquid level meter 2 is stuck with graphite powder, and flushing the liquid level meter with a lower measurement value helps to quickly calibrate the liquid level meter.

[0070] Optionally, after the first liquid level meter 1 or the second liquid level meter 2 is flushed, the first liquid level meter 1 measures the liquid level of the boiler inner cylinder 3 for a second time to obtain a first measurement value, and the second liquid level meter 2 measures the liquid level of the boiler inner cylinder 3 for a second time to obtain a second measurement value.

[0071] The first measurement value and the second measurement value obtained by the second measurement are used to determine the electric boiler liquid level value.

[0072] In the above embodiment, after the first liquid level meter 1 or the second liquid level meter 2 is flushed and calibrated, the liquid level of the boiler inner cylinder 3 is measured for a second time, which is beneficial to ensure the accuracy of the measurement result of the liquid level meter, thereby helping to obtain the correct electric boiler liquid level value, and further enabling the actual power of the electric boiler to be accurately controlled, and ensuring the safe and stable operation of the electric boiler.

[0073] Optionally, the first measurement value and the second measurement value obtained by the second measurement are used to obtain the electric boiler liquid level value, including:

[0074] if the difference between the first measurement value and the second measurement value is outside the preset range, calibrating the one of the first liquid level meter 1 and the second liquid level meter 2 that is not flushed until the difference between the first measurement value and the second measurement value is within the preset range;

[0075] if the difference between the first measurement value and the second measurement value is within the preset range, determining the larger value between the first measurement value and the second measurement value as the electric boiler liquid level value.

[0076] In the above embodiment, the second measurement obtains the first measurement value and the second measurement value, if the difference between the first measurement value and the second measurement value is out of the preset range, the one of the first liquid level meter 1 and the second liquid level meter 2 which is not flushed is calibrated until the difference between the first measurement value and the second measurement value is within the preset range. Therefore, when the difference between the first measurement value and the second measurement value of the two measurements is out of the preset range, the one of the first liquid level meter 1 and the second liquid level meter 2 which is not flushed is calibrated, and the accuracy of the measurement results of the first liquid level meter 1 and the second liquid level meter 2 is ensured.

[0077] Optionally, after the flushing of the first liquid level meter 1 and the second liquid level meter 2 is completed, the first liquid level meter 1 measures the liquid level of the boiler inner cylinder 3 for the third time to obtain a first measurement value, and the second liquid level meter 2 measures the liquid level of the boiler inner cylinder 3 for the third time to obtain a second measurement value.

[0078] The electric boiler liquid level value is determined according to the first measurement value and the second measurement value obtained by the third measurement.

[0079] In the above embodiment, the second measurement obtains the first measurement value and the second measurement value, if the difference between the first measurement value and the second measurement value is out of the preset range, the one of the first liquid level meter 1 and the second liquid level meter 2 which is not flushed is calibrated until the difference between the first measurement value and the second measurement value is within the preset range. Therefore, when the difference between the first measurement value and the second measurement value of the two measurements is out of the preset range, the one of the first liquid level meter 1 and the second liquid level meter 2 which is not flushed is calibrated, and the accuracy of the measurement results of the first liquid level meter 1 and the second liquid level meter 2 is ensured.

[0080] After the first liquid level meter 1 and the second liquid level meter 2 are calibrated respectively, the electric boiler liquid level is measured for the third time, and the electric boiler liquid level value is determined according to the first measurement value and the second measurement value obtained by the third measurement, which helps to ensure the accuracy of the electric boiler liquid level value measurement.

[0081] Therefore, the electric boiler liquid level monitoring method is reasonable in design, by setting the first liquid level meter 1 and the second liquid level meter 2 and coordinating the control of the first liquid level meter 1 and the second liquid level meter 2 by the controller 4, the liquid level monitoring failure caused by the jamming of the liquid level meter is effectively prevented, and the real-time and effective monitoring of the liquid level of the electric boiler inner cylinder 3 is facilitated.

[0082] Referring to Figure 2 and Figure 3When the electric boiler is running, the first liquid level meter 1 measures the liquid level of the boiler inner cylinder 3 for the first time to obtain a first measurement value, and sends the first measurement value to the controller 4. At the same time, the second liquid level meter 2 measures the liquid level of the boiler inner cylinder 3 for the first time to obtain a second measurement value, and sends the second measurement value to the controller 4. When the difference between the first measurement value and the second measurement value is within 5%, the larger value is taken as the output signal 7 of the liquid level value of the boiler inner cylinder 3 and is sent to the boiler control system.

[0083] In one embodiment, when the difference between the first measurement value and the second measurement value exceeds 5%, and the first measurement value is higher than the second measurement value, the second flushing assembly is started to flush the second liquid level meter 2. After flushing the second liquid level meter 2, the liquid level of the boiler inner cylinder 3 is measured for the second time by the first liquid level meter 1 and the second liquid level meter 2, and the first measurement value and the second measurement value obtained by the second measurement are sent to the controller 4 for secondary analysis and comparison. When the difference between the first measurement value and the second measurement value is within 5%, the larger value is taken as the output signal 7 of the liquid level value of the boiler inner cylinder 3 and is sent to the boiler control system.

[0084] When the second measurement value measured by the second liquid level meter 2 is higher than the first measurement value measured by the first liquid level meter 1 and the difference exceeds 5%, the first flushing assembly is started to flush the first liquid level meter 1. After flushing the first liquid level meter 1, the liquid level of the boiler inner cylinder 3 is measured for the third time by the first liquid level meter 1 and the second liquid level meter 2, and the first measurement value and the second measurement value obtained by the third measurement are sent to the controller 4 for third analysis and comparison, until the difference between the first measurement value and the second measurement value does not exceed 5%, the larger value is taken as the output signal 7 of the liquid level value of the boiler inner cylinder 3 and is sent to the boiler control system.

[0085] When the second measurement value measured by the second liquid level meter 2 is lower than the first measurement value measured by the first liquid level meter 1 and the difference exceeds 5%, the first flushing assembly is started to flush the first liquid level meter 1. After flushing the first liquid level meter 1, the liquid level of the boiler inner cylinder 3 is measured for the third time by the first liquid level meter 1 and the second liquid level meter 2, and the first measurement value and the second measurement value obtained by the third measurement are sent to the controller 4 for third analysis and comparison, until the difference between the first measurement value and the second measurement value does not exceed 5%, the larger value is taken as the output signal 7 of the liquid level value of the boiler inner cylinder 3 and is sent to the boiler control system.

[0086] In another embodiment, when the difference between the first measurement and the second measurement exceeds 5%, and the first measurement is lower than the second measurement, the first flush assembly is activated to flush the first level gauge 1. After the flushing of the first level gauge 1 is completed, the liquid level of the inner drum 3 is measured for the second time by the first level gauge 1 and the second level gauge 2, and the first measurement and the second measurement obtained from the second measurement are sent to the controller 4 for the second analysis and comparison. When the difference between the first measurement and the second measurement is within 5%, the larger value is taken as the output signal 7 of the liquid level of the inner drum 3 and is sent to the boiler control system.

[0087] When the second measurement obtained by the second level gauge 2 is higher than the first measurement obtained by the first level gauge 1 and the difference exceeds 5%, the second flush assembly is activated to flush the second level gauge 2. After the flushing of the second level gauge 2 is completed, the liquid level of the inner drum 3 is measured for the third time by the first level gauge 1 and the second level gauge 2, and the first measurement and the second measurement obtained from the third measurement are sent to the controller 4 for the third analysis and comparison. Until the difference between the first measurement and the second measurement does not exceed 5%, the larger value is taken as the output signal 7 of the liquid level of the inner drum 3 and is sent to the boiler control system.

[0088] When the second measurement obtained by the second level gauge 2 is lower than the first measurement obtained by the first level gauge 1 and the difference exceeds 5%, the second flush assembly is activated to flush the second level gauge 2. After the flushing of the second level gauge 2 is completed, the liquid level of the inner drum 3 is measured for the third time by the first level gauge 1 and the second level gauge 2, and the first measurement and the second measurement obtained from the third measurement are sent to the controller 4 for the third analysis and comparison. Until the difference between the first measurement and the second measurement does not exceed 5%, the larger value is taken as the output signal 7 of the liquid level of the inner drum 3 and is sent to the boiler control system.

[0089] Optionally, the first level gauge 1 and the second level gauge 2 are flushed every two hours, and the flushing time is 5 minutes. The first level gauge 1 and the second level gauge 2 are flushed alternately.

[0090] It should be noted that during the flushing of the first level gauge 1 or the second level gauge 2, the measurement value of the second level gauge 2 or the first level gauge 1 which is not flushed is taken as the liquid level value of the inner drum and is sent to the controller 4, and then is sent to the boiler control system by the controller 4, which helps to monitor the liquid level of the electric boiler in real time and accurately.

[0091] It can be understood that the above embodiments are only exemplary embodiments adopted for illustrating the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those skilled in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also considered as the protection scope of the present application.

Claims

1. An electric boiler liquid level monitoring method, the electric boiler comprising a boiler inner cylinder, characterized by, The method comprises the following steps: S101. The first liquid level meter and the second liquid level meter are symmetrically arranged on opposite sides of the inner cylinder of the boiler; S102. When the electric boiler is running, the first liquid level meter measures the liquid level of the inner cylinder of the boiler for the first time to obtain a first measurement value, and the second liquid level meter measures the liquid level of the inner cylinder of the boiler for the first time to obtain a second measurement value; S103. If the difference between the first measurement value and the second measurement value is outside the preset range, the first liquid level meter and / or the second liquid level meter is calibrated until the difference between the first measurement value and the second measurement value is within the preset range; If the difference between the first measurement value and the second measurement value is within the preset range, the larger one of the first measurement value and the second measurement value is determined as the electric boiler liquid level value; The first liquid level meter is provided with a first flushing assembly for flushing the first liquid level meter, and the second liquid level meter is provided with a second flushing assembly for flushing the second liquid level meter; If the difference between the first measurement value and the second measurement value is outside the preset range, the first liquid level meter and / or the second liquid level meter is calibrated, which comprises: If the first measurement value is higher than the second measurement value and the difference between the first measurement value and the second measurement value is outside the preset range, the second flushing assembly is started to flush the second liquid level meter; If the first measurement value is lower than the second measurement value and the difference between the first measurement value and the second measurement value is outside the preset range, the first flushing assembly is started to flush the first liquid level meter; After the flushing of the first liquid level meter or the second liquid level meter is completed, the first liquid level meter measures the liquid level of the inner cylinder of the boiler for the second time to obtain a first measurement value, and the second liquid level meter measures the liquid level of the inner cylinder of the boiler for the second time to obtain a second measurement value; The electric boiler liquid level value is determined according to the first measurement value and the second measurement value obtained through the second measurement.

2. The electrical boiler liquid level monitoring method of claim 1, wherein, The preset range is 5%.

3. The electric boiler liquid level monitoring method of claim 1, wherein, The first liquid level meter sends the first measurement value to a controller, and the second liquid level meter sends the second measurement value to the controller; The controller determines the electric boiler liquid level value according to the first measurement value and the second measurement value and transmits the electric boiler liquid level value to a boiler control system.

4. The electric boiler liquid level monitoring method according to claim 3, characterized in that, The first flushing assembly and the second flushing assembly are respectively connected with the controller, and the controller controls the first flushing assembly and the second flushing assembly according to the first measurement value and the second measurement value.

5. The electric boiler liquid level monitoring method according to claim 4, wherein the electric boiler liquid level value is determined according to the first measurement value and the second measurement value obtained through the second measurement, which comprises: If the difference between the first measurement value and the second measurement value is outside the preset range, the one of the first liquid level meter and the second liquid level meter which is not flushed is calibrated until the difference between the first measurement value and the second measurement value is within the preset range; ​ If the difference between the first measurement value and the second measurement value is within a preset range, the larger one of the first measurement value and the second measurement value is determined as the electric boiler liquid level value.

6. The electric boiler liquid level monitoring method according to claim 5, characterized in that, After the first liquid level meter and the second liquid level meter complete flushing respectively, the first liquid level meter measures the liquid level of the boiler inner cylinder for a third time to obtain a first measurement value, and the second liquid level meter measures the liquid level of the boiler inner cylinder for a third time to obtain a second measurement value. The electric boiler liquid level value is determined according to the first measurement value and the second measurement value obtained through the third measurement.

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