A method for calibrating a segmented magnetic float liquid level meter

Abstract

The application discloses a kind of segmented magnetic float liquid level gauge's verification method.The segmented magnetic float liquid level gauge's verification method includes: providing pull-up assembly;Pull-up assembly is one-to-one with float;Pull-up assembly includes handle and lifting rope, the first end of lifting rope is fixed on handle;Lifting rope is inserted into the inside of float from the water outlet at the top of corresponding float, and the second end of lifting rope is fixed with magnetic float;With the help of pull-up assembly, magnetic float in float is pulled up from the bottom of float to the top of float in turn, and the position of magnetic float is kept;Record the first output signal of transmitter obtained when at least one magnetic float is located at the first preset position during pulling up;Compare the first output signal with the first standard electrical signal, to verify whether the segmented magnetic float liquid level gauge is normal.The embodiment of the application can realize simple and efficient verification of the segmented magnetic float liquid level gauge, and reduce the verification cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of instruments and meters, and particularly relates to a calibration method of a sectional magnetic float liquid level meter. BACKGROUND

[0002] The magnetic float liquid level meter can be used as a measuring instrument for the submerged liquid level in the containment of a nuclear power plant, and is used for measuring the submerged water level in the containment under the accident condition of the nuclear power plant to provide post-accident monitoring function for the operating personnel. Since the ability of the single-section liquid level meter to monitor the liquid level change is limited by the height of the float, and the height of the float is limited by the manufacturing process, the prior art introduces the sectional magnetic float liquid level meter. In order to ensure the measurement effect of the sectional magnetic float liquid level meter, it is necessary to calibrate it.

[0003] The existing calibration method is to fill water into the float of the liquid level meter section by section, change the position of the magnetic float in the float, and complete the instrument calibration by measuring the current output by the transmitter. However, the existing calibration method has the following problems:

[0004] 1) The water filling and draining operation of the float is complex, and the calibration efficiency is low; and the float includes a bottom water inlet and a top water outlet, which are difficult to block for water level maintenance, and liquid leakage or even water running may occur during calibration, which may cause safety hazards.

[0005] 2) The wet calibration method needs to connect a bypass liquid level plate to each float to determine the water level in the float, so the calibration cost is high, and the preparation steps before calibration involve the installation of multiple pipe fittings and multiple bypass liquid level plates, and the calibration process is complicated. In addition, the method has poor operability in actual application scenarios (small space and total height of more than ten meters), and cannot be calibrated based on the actual installation scenario.

[0006] Therefore, the existing calibration method has the problems of high calibration cost, complex operation and low efficiency. SUMMARY

[0007] The present application provides a calibration method of a sectional magnetic float liquid level meter to achieve simple and efficient calibration of the sectional magnetic float liquid level meter and reduce the calibration cost.

[0008] The present application provides a calibration method of a sectional magnetic float liquid level meter, comprising:

[0009] A lifting assembly is provided; the number of the lifting assembly is the same as the number of the floats in the sectional magnetic float liquid level meter, and the lifting assembly corresponds to the float one by one; wherein the lifting assembly comprises a handle and a lifting rope, and the first end of the lifting rope is fixed on the handle;

[0010] For each of the lifting assemblies, the lifting rope is inserted into the buoy from the water outlet at the top of the corresponding buoy and the second end of the lifting rope is fixed to the magnetic float;

[0011] The magnetic floats in the buoy are sequentially lifted from the bottom of the buoy to the top of the buoy by the lifting assemblies and the positions of the magnetic floats are kept; the first output signal of the transmitter obtained when at least one of the magnetic floats is at the first preset position during the lifting is recorded;

[0012] The first output signal is compared with a first standard electrical signal to check whether the sectional magnetic float liquid level meter is normal; the first standard electrical signal is a preset standard electrical signal value when the magnetic float is at the first preset position in the buoy.

[0013] Optionally, the first preset position is the top of the buoy.

[0014] Optionally, the number of the buoys is n, each of the buoys corresponds to a first standard electrical signal; the i-th first standard electrical signal is smaller than the (i+1)-th first standard electrical signal; i is a positive integer smaller than n.

[0015] Optionally, the first output signal of the transmitter obtained when all the magnetic floats are at the first preset position during the lifting is recorded.

[0016] Optionally, after all the magnetic floats are lifted to the top of the buoy, the method further comprises:

[0017] The magnetic floats in the buoy are sequentially lowered from the top of the buoy to the bottom of the buoy by the lifting assemblies in reverse order and the positions of the magnetic floats are kept; the second output signal of the transmitter obtained when at least one of the magnetic floats is at the second preset position during the lowering is recorded;

[0018] The second output signal is compared with a second standard electrical signal to check whether the sectional magnetic float liquid level meter is normal; the second standard electrical signal is a preset standard electrical signal value when the magnetic float is at the second preset position in the buoy.

[0019] Optionally, the number of the buoys is at least two, each of the buoys corresponds to a second standard electrical signal.

[0020] The second preset position is lower than the first preset position; correspondingly, for the same buoy, the second standard electrical signal is smaller than the first standard electrical signal.

[0021] Optionally, the second preset position is the bottom of the buoy.

[0022] Optionally, the lifting assembly further comprises a scale.

[0023] One end of the scale is fixed with the handle, and the scale is arranged in parallel with the lifting rope; the scale is used to represent the moving distance of the magnetic float in the buoy.

[0024] Optionally, the lifting rope is inserted into the buoy from the water outlet at the top of the corresponding buoy, and the second end of the lifting rope is fixed with the magnetic float, comprising:

[0025] The bottom flange of the buoy is removed, and the magnetic float is taken out from the bottom of the buoy;

[0026] The lifting rope is inserted into the buoy from the water outlet at the top of the corresponding buoy until the second end of the lifting rope is extended from the bottom of the buoy;

[0027] The second end of the lifting rope is fixed with the magnetic float;

[0028] The magnetic float is reinstalled into the buoy, and the bottom flange is reinstalled.

[0029] Optionally, after checking whether the segmented magnetic float liquid level meter is normal, the method further comprises:

[0030] The lifting rope is removed from the corresponding magnetic float;

[0031] The lifting rope is pulled out from the water outlet at the top of the corresponding buoy.

[0032] The verification method of the segmented magnetic float liquid level meter provided by the embodiment of the present application does not need to use liquid throughout, but changes the position of the magnetic float by the up and down movement of the lifting assembly to realize verification, which fundamentally solves the problem of water filling and draining involved in the wet verification method. Specifically, by using the lifting verification method, the risk caused by running, leaking and dripping to the verification personnel and equipment involved in the wet verification method is technically avoided; and the use of water filling, water draining and sealing and related tools is technically avoided, which can effectively simplify the verification steps, improve the verification efficiency, and reduce the cost. Therefore, compared with the prior art, the embodiment of the present application can realize simple and efficient verification of the segmented magnetic float liquid level meter, and reduce the verification cost.

[0033] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to make the technical solution in the embodiments of the present application clearer, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0035] Figure 1 is a structural schematic diagram of a sectional magnetic float liquid level meter provided by the embodiments of the present application;

[0036] Figure 2 is a structural schematic diagram of a measuring assembly provided by the embodiments of the present application;

[0037] Figure 3 is a structural schematic diagram of a water outlet provided by the embodiments of the present application;

[0038] Figure 4 is a flow schematic diagram of a calibration method of a sectional magnetic float liquid level meter provided by the embodiments of the present application;

[0039] Figure 5 is a flow schematic diagram of another calibration method of a sectional magnetic float liquid level meter provided by the embodiments of the present application;

[0040] Figures 6-10 is a moving process schematic diagram of a pull-up assembly in a calibration process provided by the embodiments of the present application. DETAILED DESCRIPTION

[0041] In order to make the technical solution in the embodiments of the present application clearer, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0042] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process or method including a series of steps does not necessarily limit to those steps clearly listed, but can include other steps not clearly listed or inherent to these processes or methods.

[0043] As described in the background, the existing verification method has the problems of high verification cost, complicated operation and low efficiency. First, the structure and working mode of the segmented magnetic float liquid level meter are described below. Figures 1-3

[0044] Referring to Figures 1-3 , the segmented liquid level meter comprises a plurality of measuring assemblies and a transmitter 40. The plurality of measuring assemblies are connected in sequence by cables, and the last measuring assembly is connected with the transmitter 40 by a cable. Each measuring assembly comprises a float 10, a magnetic float 20 (with a magnetic component) arranged in the float 10, and a reed resistor assembly 30 fixed to the outside of the float 20, which is a magnetic sensitive element. Specifically, referring to Figure 2 , the float 10 is provided with a water outlet 12 at the top and a water inlet 11 at the bottom, and is provided with a bottom flange 13 at the bottom. The water inlet 11 and the water outlet 12 can be provided in a mesh shape as shown in Figure 3 . In addition, a spring 14 can be fixedly arranged at the bottom of the float 10 as a buffer device when the magnetic float 20 falls. The measuring principle of a single measuring assembly is that the liquid enters the inside of the float 10 from the water inlet 11, and the magnetic float 20 is floated up; the magnetic component carried by the magnetic float 20 controls the on-off of the reed resistor assembly 30 through magnetic coupling to change the resistance value of the reed resistor assembly 30.

[0045] For example, the liquid level meter in Figure 1 comprises five measuring assemblies. In actual use, the five measuring assemblies are installed at different heights in the liquid container. When installing, the height difference between the top of the lower float 10 and the bottom of the upper float 10 can be within the allowable range for adjacent two floats 10. Define the first to fifth measuring assemblies from low to high. The top of the reed resistor assembly 30 in a measuring assembly is electrically connected with the bottom of the reed resistor assembly 30 in the next measuring assembly through a wire; the top of the reed resistor assembly 30 in the fifth measuring assembly is connected with the transmitter 40. The transmitter 40 outputs a current signal IOUT according to the resistance of each section of the reed resistor assembly 30 to represent the liquid level height. Specifically, the liquid enters the float 10 from the bottom of the float 10 at the lowest point, and the liquid level passes through the five measuring assemblies from low to high. For example, in a measuring assembly, the lower the position of the magnetic float 20, the greater the resistance of the reed resistor assembly 30; the resistance of the reed resistor assembly 30 changes linearly with the position of the magnetic float 20. Therefore, from the magnetic float 20 in the first measuring assembly being located at the bottom of the float 10 to the magnetic float 20 in the fifth measuring assembly being located at the top of the float 10, the current signal IOUT output by the transmitter 40 gradually increases; the range of the current signal IOUT output by the transmitter 40 is, for example, 4-20 mA. ​

[0046] In existing technologies, the calibration of such level gauges typically employs a wet calibration method, which involves equipping each measuring component with a bypass level plate. This calibration method has the following problems:

[0047] 1. Due to the structure of the float 10, it is difficult to seal the inlet 11 and outlet 12 of the float 10. During the test, leakage or even water runoff may occur, which may pose a safety hazard to personnel and equipment below.

[0048] 2. Since both the inlet 11 and the outlet 12 are mesh, it is difficult and inefficient to fill and drain the float 10 during the calibration period.

[0049] 3. Existing technologies involve the installation of dozens of pipe fittings and glass liquid level plates, which are not very practical and difficult to implement in actual application scenarios.

[0050] 4. According to the inventor's analysis, the existing technology can only support the calibration of the level gauge when all floats 10 are placed on the same plane (i.e., calibration before instrument installation), and cannot be applied to the calibration scenario after the instrument is installed in sequence according to height.

[0051] Based on the above research, this invention provides a calibration method for a segmented magnetic float level gauge. This method uses a dry calibration method, which is simple to operate and easy to implement. Figure 4 This is a flowchart illustrating a calibration method for a segmented magnetic float level gauge provided in an embodiment of the present invention. See also... Figure 4 The verification method includes the following steps:

[0052] S110. Provide lifting components; the number of lifting components is the same as the number of floats in the segmented magnetic float level gauge, and the lifting components correspond one-to-one with the floats; wherein, the lifting components include a handle and a lifting rope, and the first end of the lifting rope is fixed to the handle.

[0053] The suspension rope is a non-elastic rope. The length of the suspension rope is greater than the distance the magnetic float moves in the float, so as to ensure that the remaining length of the suspension rope after it is fixedly connected to the magnetic float is still greater than or equal to the distance the magnetic float moves in the float, thereby realizing the calibration of the level gauge throughout its entire range.

[0054] S120. For each lifting assembly, extend the hoisting rope into the interior of the corresponding float from the outlet at the top of the float, and fix the second end of the hoisting rope to the magnetic float.

[0055] This step is equivalent to a preparatory step before verification, and can be implemented through the following steps:

[0056] 1. Remove the bottom flange of the pontoon and take out the magnetic float from the bottom of the pontoon.

[0057] 2. Insert the hoisting rope into the corresponding float from the outlet at the top of the float until the second end of the hoisting rope extends out from the bottom of the float.

[0058] 3. Secure the second end of the suspension rope to the magnetic levitation float. This step can be achieved by wrapping the suspension rope around the magnetic levitation float or by other methods that ensure that there is no relative displacement between the second end of the suspension rope and the magnetic levitation float during the movement of the suspension rope.

[0059] 4. Reinstall the magnetic float back into the pontoon and reinstall the bottom flange back to the bottom of the pontoon.

[0060] Repeat the above four steps until the suspending rope installation is completed for all magnetic floats in all pontoons.

[0061] The order of the first and second steps can be changed according to actual needs.

[0062] S130. Using the lifting assembly, the magnetic floats inside the float are sequentially lifted from the bottom to the top of the float, and the position of the magnetic floats is maintained; the first output signal of the transmitter is recorded when at least one magnetic float is in the first preset position during the lifting process.

[0063] In this step, the lifting handle is moved upward, causing the suspension rope to move upward, thereby lifting the magnetic levitation float.

[0064] In this step, after the previous magnetic float is pulled up to the top of the float by the lifting assembly, the next magnetic float is pulled up by the next lifting assembly; at the same time, the previous magnetic float must be kept at the top of the float. This is equivalent to simulating the process of liquid level rising.

[0065] S140. Compare the first output signal with the first standard electrical signal to verify whether the segmented magnetic float level gauge is normal; wherein, the first standard electrical signal is the preset standard electrical signal value when the magnetic float is in the first preset position in the float.

[0066] The system comprises n floats, where n is an integer greater than or equal to 2; each float corresponds to a first standard electrical signal; the floats are numbered 1 to 1i sequentially from low to high along the direction closest to the transmitter. The 1i-th first standard electrical signal is less than the (i+1)-th first standard electrical signal; i is a positive integer less than n. A first output signal is considered to match its corresponding first standard electrical signal when the first output signal is equal to the corresponding first standard electrical signal, or when the difference between the first output signal and its corresponding first standard electrical signal is within an allowable range. The segmented magnetic float level gauge is considered normal when all first output signals recorded in S130 match their corresponding first standard electrical signals. An abnormality in the segmented magnetic float level gauge is determined if any pair of first output signals does not match their corresponding first standard electrical signals. For example, a comparison can be performed after each recorded first output signal; or, a comparison can be performed after all first output signals have been recorded; the specific timing of the comparison is not limited here.

[0067] The calibration method for segmented magnetic float level gauges provided in this invention eliminates the need for liquid throughout the process. Calibration is achieved by changing the position of the magnetic float through the up-and-down movement of a lifting assembly, fundamentally solving the difficulties of filling and draining water associated with wet calibration methods. Specifically, the lifting calibration method technically avoids the risks to calibration personnel and equipment caused by leaks and spills inherent in wet calibration methods. Furthermore, it avoids the use of tools for filling, draining, and sealing, effectively simplifying the calibration steps, improving calibration efficiency, and reducing costs. Therefore, compared to existing technologies, this invention provides a simple and efficient calibration method for segmented magnetic float level gauges, while reducing calibration costs.

[0068] Based on the above embodiments, optionally, in S130, the first output signal of the transmitter obtained when all magnetic floats are in the first preset position during the lifting process can be recorded to realize the verification of all measuring components and improve the verification accuracy.

[0069] Based on the above embodiments, optionally, the first preset position is the top of the float, and correspondingly, the value of the i-th first standard electrical signal is: Imin + (i / n) * (Imax - Imin); where Imin is the preset output current of the transmitter when the magnetic float in the first measuring component is located at the bottom of the float, that is, the minimum value of the range of the current signal output by the transmitter. Imax is the preset output current of the transmitter when the magnetic float in the n-th measuring component is located at the top of the float, that is, the maximum value of the range of the current signal output by the transmitter.

[0070] The above embodiments exemplify the calibration process of the level gauge under simulated liquid level rise, but are not intended to limit the present invention. In other embodiments, the liquid level can also be simulated to calibrate the level gauge.

[0071] Figure 5 This is a flowchart illustrating another calibration method for a segmented magnetic float level gauge provided in an embodiment of the present invention. See also... Figure 5 In one implementation, the verification method may optionally include:

[0072] S210 provides a lifting assembly.

[0073] The structure of the lifting component can be found in [reference needed]. Figure 6 For example, the lifting assembly 100 further includes a scale 130. One end of the scale 130 is fixed to the handle 110, for example, by means of a rope; and the scale 130 is arranged parallel to the lifting rope 120. The graduations on the scale 130 are used to characterize the distance the magnetic levitation 20 travels in the float 10. The graduations on the scale 130 can be determined based on the effective travel distance (effective range) of the magnetic levitation 20 in the float 10 and the method of fixing the magnetic levitation 20, etc.

[0074] This configuration allows the magnetic levitation 20 to be moved using the suspension rope 120 while the scale on the ruler 130 is read, thus determining the distance the magnetic levitation 20 has traveled and its position within the float 10. This enables the calibration method to support calibration of the magnetic levitation 20 in various positions. For example, the length of the ruler 130 is greater than or equal to the effective travel distance of the magnetic levitation 20, the scale on the ruler 130 is uniform, and the scale range at least covers the effective travel distance of the magnetic levitation 20, ensuring that the ruler 130 effectively indicates the position of the magnetic levitation 20 throughout the calibration process.

[0075] Alternatively, marking graduations on the suspension rope 120 can also achieve the same effect.

[0076] S220. For each lifting assembly, extend the hoisting rope into the interior of the corresponding float from the outlet at the top of the float, and fix the second end of the hoisting rope to the magnetic float.

[0077] The process of the hoisting rope 120 being inserted into the outlet 12 can be found in [reference needed]. Figure 6 The suspension rope 120 may be slightly longer than the scale 130 to provide a length allowance for the second end (lower end) of the suspension rope 120 to be connected to the magnetic levitation element 20. The structure after the suspension rope 120 is connected to the magnetic levitation element 20 can be found in [reference needed]. Figure 7For example, the 0 mark of the scale 130 is at the top of the scale 130. When the magnetic float 20 is at the bottom of the float 10, the 0 mark of the scale 130 can be set to be flush with the top surface of the float 10. Then, during movement, by reading the scale at the position where it is flush with the top surface of the float 10, the position of the magnetic float 20 in the float 10 can be determined, thereby finding the standard value of the transmitter's output signal at that position and verifying the actual output signal of the transmitter. Furthermore, during the preparation phase, when the lifting assembly 100 is at the position where the 0 mark of the scale 130 is flush with the top surface of the float 10 and the magnetic float 20 is at the bottom of the float, the suspension rope 120 can be marked at the position where the top of the suspension rope 120 intersects with the top of the magnetic float 20; when fixing the suspension rope 120 and the magnetic float 20, the top of the magnetic float 20 can be fixed at the marked position on the suspension rope 120 to ensure the accuracy of the position reading of the magnetic float 20.

[0078] S230. Using the lifting assembly, the magnetic floats inside the float are sequentially lifted from the bottom to the top of the float, and the position of the magnetic floats is maintained; the first output signal of the transmitter is recorded when at least one magnetic float is in the first preset position during the lifting process.

[0079] For a measuring component, the process of using a lifting assembly to raise the magnetic float from the bottom to the top of the float can be found in [reference needed]. Figures 7-9 For example, the process includes: the self-magnetic levitation 20 being positioned as... Figure 7 The starting point is shown in the image. Figure 8 As shown, the lifting assembly 100 is moved upwards, causing the suspension rope 120 to pull the magnetic float 20 up until the magnetic float 20 is pulled up to the position shown. Figure 9 The location shown is the top of the pontoon 10.

[0080] S240. Determine whether the first output signal and the first standard electrical signal are fully matched; if yes, execute S250; if no, execute S280.

[0081] When the first output signal matches the first standard electrical signal completely, the next step of verification can be performed; when the first output signal does not match the first standard electrical signal completely, the level gauge can be directly determined to be abnormal.

[0082] S250, using the lifting assembly, the magnetic floats inside the pontoon are controlled to descend from the top of the pontoon to the bottom of the pontoon in reverse order, and the position of the magnetic floats is maintained; the second output signal of the transmitter is recorded when at least one magnetic float is in the second preset position during the descent.

[0083] In this process, after the i-th magnetic buoy descends to the bottom of the buoy, the (i-1)-th magnetic buoy is then controlled to descend; simultaneously, the i-th magnetic buoy must be kept at the bottom of the buoy. This effectively simulates the process of liquid level drop.

[0084] For example, for a measuring component, the process of controlling the magnetic buoy to descend from the top to the bottom of the buoy using a lifting component can be found in [reference needed]. Figures 9-10 For example, the process includes: the self-magnetic levitation 20 being positioned as... Figure 9 The starting point is shown in the image. Figure 10 As shown, the lowering and lifting assembly 100 causes the magnetic levitation 20 to fall until it descends to a position similar to... Figure 7 The location shown is the bottom of the pontoon 10.

[0085] For example, in this step, the second output signal of the transmitter can be recorded when all magnetic floats are in the second preset position during the descent, so as to realize the verification of all measurement components and improve the verification accuracy.

[0086] S260. Determine whether the second output signal and the second standard electrical signal are fully matched; if yes, execute S270; if no, execute S280.

[0087] This step is equivalent to comparing the second output signal with the second standard electrical signal to verify whether the segmented magnetic float level gauge is functioning correctly. The second standard electrical signal is the preset standard electrical signal value when the magnetic float is at the second preset position within the float. Each float corresponds to one second standard electrical signal. The matching conditions can be referred to in S140 for the matching conditions between the first output signal and the first standard electrical signal, and will not be repeated here.

[0088] Optionally, the second preset position is lower than the first preset position; correspondingly, for the same buoy, the second standard electrical signal is less than the first standard electrical signal. For example, when the first preset position is the top of the buoy and the second preset position is the bottom of the buoy, the value of the i-th first standard electrical signal can be set to be equal to the value of the (i+1)-th second standard electrical signal; or, considering the difference in installation height of the buoys, the (i+1)-th second standard electrical signal can be set to be slightly greater than the i-th first standard electrical signal, with the difference determined based on the difference in installation height.

[0089] S270, segmented magnetic float level gauge is normal.

[0090] S280, segmented magnetic float level gauge malfunction.

[0091] S290. Remove the hoisting rope from the corresponding magnetic float; and pull the hoisting rope out of the outlet at the top of the corresponding float.

[0092] This step is equivalent to a restoration process. After verification, the hoisting ropes need to be removed, and the pontoon needs to be restored to its initial state. This step may specifically include:

[0093] 1. Remove the bottom flange 13 of the float and take out the magnetic float 20.

[0094] 2. Remove the suspension rope 120 from the magnetic float 20.

[0095] 3. Pull the hoisting rope 120 out from the top outlet 12 of the float 10.

[0096] 4. Reinstall the magnetic float 20 and the bottom flange 13.

[0097] Repeat the above 4 steps until all pontoons 10 have had their slings 120 removed.

[0098] In summary, this embodiment achieves the calibration of a segmented magnetic float level gauge through steps S210-S290. The movement of the magnetic float within its measuring range is achieved through the interaction between the upward tension of the suspension rope and the gravity of the magnetic float. No water is required throughout the process, fundamentally solving the difficulties and risks associated with filling and draining the water, and improving testing efficiency, thereby enhancing the safety and economic benefits of nuclear power plants. Furthermore, the suspension rope is inserted into the float from the top outlet, and even if the outlet has a mesh structure, it does not affect the rope's insertion. In other words, due to the thinness of the suspension rope, this method has no restrictions on the shape of the outlet and eliminates the need for dismantling the top of the float.

[0099] For example, if this verification method is to be used in the field, it needs to go through the preparation, testing, and recovery phases as described above. The following example... Figure 1 Taking the liquid level gauge as an example, let's define the five measuring components from bottom to top as number 1 to 5, and explain the specific calibration process. The detailed steps are as follows:

[0100] I. Preparation Phase: Install the hoisting ropes for each pontoon. Specific steps are as follows:

[0101] Remove the bottom flange of the float and take out the magnetic float;

[0102] Insert the hoisting rope (with graduation marks) down into the buoy from the outlet at the top of the buoy until it extends out from the inlet at the bottom of the buoy;

[0103] Secure the rope to the float according to the markings;

[0104] Reinstall the float and bottom flange;

[0105] Repeat the above four steps to complete the installation of the hoisting ropes for all five sections of the pontoon.

[0106] II. Testing Phase: The calibration is completed by moving the float using a suspension rope. The specific steps are as follows:

[0107] 1. Confirm that the hoisting rope is not being pulled and that the initial reading on the instrument is 0%.

[0108] The instrument real number can be understood as a percentage of the value calculated according to the following formula: (Ireal-Imin) / (Imax-Imin), where Ireal represents the actual value of the current signal IOUT output by transmitter 40.

[0109] 2. Slowly raise the first hoisting rope until the first magnetic float is raised to the top of the first float, and check if the instrument reading is 20%.

[0110] 3. Slowly raise the second rope until the second magnetic float is raised to the top of the second pontoon, and check if the instrument reading is 40%.

[0111] 4. Slowly raise the third rope until the third magnetic float is raised to the top of the third pontoon, and check if the instrument reading is 60%.

[0112] 5. Slowly raise the fourth rope until the fourth magnetic float is raised to the top of the fourth float, and check if the instrument reading is 80%.

[0113] 6. Slowly raise the 5th rope until the 5th magnetic float is raised to the top of the 5th pontoon, and check if the instrument reading is 100%.

[0114] 7. Slowly lower the 5th rope until the 5th magnetic float lands at the bottom of the 5th buoy, and check if the instrument reading is 80%.

[0115] 8. Slowly lower the fourth rope until the fourth magnetic float reaches the bottom of the fourth float, and check if the instrument reading is 60%.

[0116] 9. Slowly lower the third rope until the third magnetic float reaches the bottom of the third buoy, and check if the instrument reading is 40%.

[0117] 10. Slowly lower the second rope until the second magnetic float lands at the bottom of the second buoy, and check if the instrument reading is 20%.

[0118] 11. Slowly lower the first rope until the first magnetic float lands at the bottom of the first float, and check if the instrument reading is 0%.

[0119] III. Recovery Phase: The lifting ropes for each pontoon will be removed. Specific steps are as follows:

[0120] Remove the bottom flange of the float and take out the magnetic float;

[0121] Remove the suspension rope from the magnetic levitation device;

[0122] Pull the hoisting rope out of the top outlet of the float;

[0123] Reinstall the magnetic float and bottom flange;

[0124] Repeat the above four steps to complete the removal of the hoisting ropes from all five sections of the pontoon.

[0125] During the verification process, the position of each measurement component is not limited; they can be placed side by side or according to the arrangement used in actual applications.

[0126] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0127] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A calibration method for a segmented magnetic float level gauge, characterized in that, include: A lifting assembly is provided; the number of the lifting assemblies is the same as the number of floats in the segmented magnetic float level gauge, and the lifting assembly corresponds one-to-one with the float; wherein, the lifting assembly includes a handle and a lifting rope, and the first end of the lifting rope is fixed to the handle; For each of the lifting components, the hoisting rope is inserted into the interior of the corresponding float from the outlet at the top of the float, and the second end of the hoisting rope is fixed to the magnetic float; The magnetic floats inside the float are sequentially pulled up from the bottom to the top of the float using the lifting assembly, and the position of the magnetic floats is maintained; the first output signal of the transmitter is recorded when at least one of the magnetic floats is in a first preset position during the lifting process; The first output signal is compared with the first standard electrical signal to verify whether the segmented magnetic float level gauge is normal; wherein, the first standard electrical signal is the preset standard electrical signal value of the magnetic float when it is in the first preset position in the float; After all the magnetic floats have been pulled up to the top of the buoy, the process further includes: The magnetic floats inside the pontoon are controlled to descend from the top to the bottom of the pontoon in reverse order using the lifting assembly, and the position of the magnetic floats is maintained; the second output signal of the transmitter is recorded when at least one of the magnetic floats is in a second preset position during the descent. The second output signal is compared with the second standard electrical signal to verify whether the segmented magnetic float level gauge is normal; wherein, the second standard electrical signal is the preset standard electrical signal value of the magnetic float when it is in the second preset position in the float.

2. The calibration method for the segmented magnetic float level gauge according to claim 1, characterized in that, The first preset position is the top of the pontoon.

3. The calibration method for the segmented magnetic float level gauge according to claim 1, characterized in that, The number of floats is n, and each float corresponds to one first standard electrical signal; the i-th first standard electrical signal is less than the (i+1)-th first standard electrical signal; i is a positive integer less than n.

4. The calibration method for the segmented magnetic float level gauge according to claim 1, characterized in that, The first output signal of the transmitter is recorded when all the magnetic floats are in the first preset position during the lifting process.

5. The calibration method for the segmented magnetic float level gauge according to claim 1, characterized in that, The number of the floats is at least two, and each float corresponds to one of the second standard electrical signals; The second preset position is lower than the first preset position; correspondingly, for the same float, the second standard electrical signal is less than the first standard electrical signal.

6. The calibration method for the segmented magnetic float level gauge according to claim 1, characterized in that, The second preset position is the bottom of the pontoon.

7. The calibration method for the segmented magnetic float level gauge according to claim 1, characterized in that, The lifting assembly also includes: a scale; One end of the scale is fixed to the handle, and the scale is set parallel to the suspension rope; the graduations on the scale are used to characterize the distance the magnetic float moves in the float.

8. The calibration method for the segmented magnetic float level gauge according to claim 1, characterized in that, The suspension rope is inserted into the interior of the corresponding float from the outlet at the top of the float, and the second end of the suspension rope is fixed to the magnetic float, including: Remove the bottom flange of the pontoon and take out the magnetic float from the bottom of the pontoon; The hoisting rope is inserted into the float from the outlet at the top of the corresponding float until the second end of the hoisting rope extends out from the bottom of the float; Fix the second end of the suspension rope to the magnetic float; The magnetic float is reinstalled into the buoy, and the bottom flange is reinstalled.

9. The calibration method for the segmented magnetic float level gauge according to claim 1, characterized in that, After verifying whether the segmented magnetic float level gauge is functioning properly, the following steps are also included: Remove the suspension rope from the corresponding magnetic float; The hoisting rope is pulled out from the outlet at the top of the corresponding float.

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