CN118817024A - A liquid level detection system with blockage alarm function and blockage alarm method thereof - Google Patents

Abstract

The present invention relates to the technical field of liquid level monitoring, in particular to a liquid level detection system with a blockage alarm function and a blockage alarm method thereof. The liquid level detection system comprises: a liquid level meter, an alarm system and at least two bypass pipes; a liquid level measurement chamber of the liquid level meter is provided with a first sensor adjacent to and higher than a second bypass pipe, the first sensor is used to obtain a first liquid level height, and an electrical signal of the first sensor is connected to the alarm system; the alarm method involves: the alarm system is provided with a first alarm, a first liquid inlet timer, and a second liquid inlet timer; the alarm system can determine whether the first bypass pipe is blocked or not according to the first liquid level height, a first set liquid inlet time, a second set liquid inlet time, a first liquid inlet moment, and a second liquid inlet moment, and then trigger or not trigger the first alarm, thereby realizing the blockage alarm method provided for the liquid level detection system, avoiding the occurrence of low liquid level monitoring failure, and improving the accuracy of liquid level monitoring.

Description

A liquid level detection system with blockage alarm function and blockage alarm method thereof

Technical Field

The invention relates to the technical field of liquid level monitoring, in particular to a liquid level detection system with a blockage alarm function and a blockage alarm method thereof.

Background Art

Commonly used blockage alarm methods include float method, resistance method, magnetostriction method, ultrasonic method, etc.; Float method: The float is used as a liquid level measuring element to measure the liquid level in the monitoring chamber of the container or communicating vessel, and the liquid level is transmitted as an electrical signal to a display device such as a coding disk or coding belt to monitor the liquid level in the container. Magnetostriction method: Based on the float method, a magnet is set in the float to generate a fixed magnetic field. During measurement, the head of the level meter sends out a low-current interrogation pulse. The magnetic field generated by the current is transmitted downward along the waveguide. When the current magnetic field meets the float magnetic field, a return pulse is generated. The time difference between the interrogation pulse and the return pulse corresponds to the height of the oil-water interface and the oil-gas interface.

Such blockage alarm methods are limited by the structure of the liquid level monitoring device. The principle of liquid level measurement is to transmit the liquid level signal to the magnetic flap installed on the outside of the bypass chamber through a float with a built-in magnetic steel. The liquid level turns from white to red when it rises, and from red to white when it drops, thereby displaying the height of the liquid level. However, during use, such liquid level monitoring devices are prone to blockage at the lower position of the liquid level detection system due to the presence of slag or waste liquid in the liquid in the container. Such liquid level measurement devices and blockage alarm methods cannot promptly detect the blockage situation, resulting in the staff being unable to repair and discharge the slag in time, and there is a problem of failure of low liquid level monitoring of the container or inability to accurately measure the liquid level.

Summary of the invention

The purpose of the present invention is to provide a liquid level detection system with a blockage alarm function in view of the problem that the liquid level detection system and monitoring method in the prior art cannot timely monitor the blockage at the bottom of the liquid level monitoring chamber, resulting in failure of low liquid level monitoring or inaccurate measurement, comprising: a liquid level meter, an alarm system and at least two bypass pipes; the two bypass pipes are of equal height at one end for connecting to the container, and of different heights at one end for connecting to the liquid level measurement chamber of the liquid level meter, the bypass pipe with the lowest height among the two bypass pipes is the first bypass pipe, and the second bypass pipe is successively higher than the first bypass pipe; the liquid level measurement chamber of the liquid level meter is provided with a first sensor adjacent to the second bypass pipe and higher than the second bypass pipe, the first sensor is used to obtain a first liquid level height, The electrical signal of the first sensor is connected to the alarm system, and thus the first liquid level height can be transmitted to the alarm system; the alarm system is provided with a first alarm, a first liquid inflow timer, and a second liquid inflow timer; the alarm system can set and store a first set liquid inflow time and a second set liquid inflow time; the first liquid inflow timer is used to record the first liquid inflow moment after the liquid level detection system starts to run; the second liquid inflow timer is used to record the second liquid inflow moment after the first liquid inflow timer stops timing; the alarm system can determine whether the first bypass pipe is blocked or not according to the first liquid level height, the first set liquid inflow time, the second set liquid inflow time, the first liquid inflow moment and the second liquid inflow moment, and thus trigger or not trigger the first alarm.

The liquid level detection system with a blockage alarm function of the present invention is provided with at least two bypass pipes of different heights connected to the liquid level measurement chamber. If the lower bypass pipe of the two adjacent bypass pipes is blocked, the higher bypass pipe will flow liquid into the liquid level measurement chamber. Compared with the lower bypass pipe, the higher bypass pipe has an additional liquid flow time between the first bypass pipe and the second bypass pipe in the liquid level measurement chamber, that is, the time for the measuring liquid to flow through the higher bypass pipe and reach the same height is longer than that for the measuring liquid to flow through the lower bypass pipe. The first set liquid flow time and the second set liquid flow time can be set and stored through the alarm system, and the first liquid flow timer and the second liquid flow timer can be used to set and store the first liquid flow timer and the second liquid flow timer. The liquid inlet timer records the first liquid inlet moment and the second liquid inlet moment of the liquid inlet from the lower bypass pipe and the higher bypass pipe respectively. The alarm system determines whether the first liquid inlet moment exceeds the first set liquid inlet time and whether the second liquid inlet moment exceeds the second set liquid inlet time, determines whether the first sensor obtains the signal of the first liquid level height, and then determines whether the lower bypass pipe is blocked, triggers or does not trigger the first alarm, and realizes alarm for blockage of the liquid level detection system, which is convenient for manual timely cleaning of blockages, so that the liquid level monitoring device can be cleared in time, avoids the failure of low liquid level monitoring, and improves the accuracy of liquid level monitoring.

Preferably, in the liquid level detection system with a blockage alarm function described in the present invention, the liquid level measuring chamber is provided with a plurality of second sensors arranged in equidistant heights; the electrical signals of the second sensors are connected to the alarm system; the electrical signals of the alarm system are connected to the equipment operation platform, thereby being able to control the discharge of liquid from the container through the equipment operation platform.

Since the existing liquid level detection system needs to start the pump after receiving the highest water level signal, it is impossible to discharge condensed water according to actual needs, and the water level height after the pump pumps water cannot be monitored in real time, which causes the problem of mismatch with the use of the equipment. As a preferred solution of the present invention, by arranging multiple second sensors with equidistant heights in the liquid level measurement cavity, the second liquid level height of the liquid level measurement cavity can be measured, and an analog signal is formed and transmitted to the alarm system, which is then transmitted to the equipment operation platform through the alarm system. Under the control of the equipment operation platform, the pump can be opened or closed at the liquid level height corresponding to each second sensor according to actual working conditions, thereby improving the matching degree between the liquid level detection system and the system used by the container or to which the container is connected, and improving the applicability of the liquid level detection system.

Preferably, in the liquid level detection system with a blockage alarm function described in the present invention, the alarm system can receive the second liquid level height obtained by the second sensor, and identify the sequence in which two adjacent second sensors obtain the second liquid level heights, thereby being able to determine whether the liquid level in the container rises or falls.

As a preferred solution of the present invention, by connecting the alarm system electrical signal to the equipment operation control platform, the second liquid level height obtained by the second sensor can be received, and by identifying the sequence of the second liquid level heights obtained by two adjacent second sensors, the difference between the second liquid level height obtained later and the second liquid level height obtained earlier can be calculated by the calculation unit, and by identifying the positive or negative of the difference, it is determined whether the liquid level in the container is rising or falling, so that the liquid level detection system can know whether the liquid level is rising or falling through the alarm system during the use of the container, thereby further improving the applicability of the liquid level detection system.

Preferably, the liquid level detection system with a blockage alarm function described in the present invention is provided with a second alarm and a drainage timer, and the first sensor is also used to obtain a third liquid level height. The alarm system can set and store a set drainage time; the drainage timer is used to record the drainage time after the liquid level drops to the second bypass pipe; the alarm system can determine, based on the set drainage time and drainage time, whether the signal of the third liquid level height obtained by the first sensor within the set drainage time continues to exist or disappears, and thereby trigger or not trigger the second alarm.

As a preferred embodiment of the present invention, a second alarm is arranged in the alarm system, and the alarm system can determine that the liquid level in the container is decreasing, and then record the drainage time after the second bypass pipe starts to drain through a drainage timer, and determine that the drainage time is within the set drainage time. If the height of the second bypass pipe remains unchanged, it indicates that the bypass pipe at a lower height is blocked, thereby triggering the second alarm, so that during the operation of the liquid level detection system, an alarm reminder for blockage during the liquid level drop is realized, which makes it convenient for the staff to clear the blockage in time after receiving the alarm, so that the liquid level detection system can monitor the blockage when the liquid level drops during the use of the container, thereby further improving the applicability of the liquid level detection system.

Preferably, the liquid level detection system with a blockage alarm function described in the present invention further includes a transmitter, wherein the first sensor is a magnetostrictive sensor, and the transmitter is used to convert the liquid level height obtained by the first sensor into an analog signal and transmit it to the alarm system.

As a preferred solution of the present invention, by setting a transmitter in conjunction with a magnetostrictive first sensor, the liquid level signal obtained by the first sensor can be transmitted to the alarm system relatively quickly, so that the signal obtained by the first sensor is not affected by the inductance, capacitance and load properties in the line, and there is no phase shift problem, so that the alarm system can respond accurately and quickly, making it convenient for staff to obtain information about the blockage of the liquid level detection system in a timely manner, thereby further improving work efficiency.

In view of the problem that the blockage alarm method in the prior art cannot timely detect the blockage at the bottom of the liquid level meter, resulting in failure of low liquid level monitoring or inaccurate measurement, based on the liquid level detection system with a blockage alarm function, the present invention also provides a blockage alarm method, comprising the following steps:

S1: according to the time from when the liquid level detection system starts to run to when the first bypass pipe can flow liquid into the liquid level measurement chamber and the liquid level is detected by the first sensor, a first set liquid flow time is set and stored; according to the time from when the second bypass pipe flows from the first set liquid flow time to when the liquid flow height reaches the first sensor, a second set liquid flow time is set;

S2: When the liquid level detection system starts to operate, the first liquid inlet timer is triggered to start timing; the first liquid level height is obtained through the first sensor; it is determined that the first liquid inlet time is within the first set liquid inlet time, and the first sensor obtains the first liquid level height, and the first alarm is not triggered;

S3: determining that the first liquid inlet time exceeds the first set liquid inlet time, and the first sensor does not obtain the first liquid level height, triggering the second liquid inlet timer to start timing;

S4: determining that the second liquid inlet time is within the second set liquid inlet time, and the first sensor obtains the first liquid level height, and triggering the first alarm;

The blockage alarm method of the present invention provides a reference for the estimated liquid filling time of the first bypass pipe and the second bypass pipe by setting and storing the first set liquid filling time and the second set liquid filling time in the alarm system, and then records the first liquid filling moment after the system starts running through the first liquid filling timer as a time record of the first bypass pipe starting to fill with liquid. The first sensor obtains the first liquid level height, and the calculation unit of the alarm system can identify whether the first liquid filling moment exceeds the first set liquid filling time, and determine whether the first sensor obtains the first liquid level height within the first set liquid filling time. If the first liquid level height is obtained, it means that the first bypass pipe is not blocked and can pass liquid, thereby not triggering the first alarm; if the first sensor does not obtain the first liquid level height after continuing to determine the first set liquid filling time, it indicates that there are two possibilities: one is that the liquid level in the container is lower than The first bypass pipe has a liquid flow height, and the second bypass pipe is blocked and cannot flow liquid, and the first sensor cannot measure the first liquid level height; then, by triggering the second liquid inlet timer to start timing, the calculation unit of the alarm system can identify the second liquid inlet moment within the second set liquid inlet time, and determine whether the first sensor obtains the first liquid level height within the second set liquid inlet time. If the first liquid level height is obtained, it indicates that the liquid level in the container is higher than the second bypass pipe, and the first bypass pipe is blocked, thereby triggering the first alarm to alarm; through the above-mentioned blockage alarm method, it is possible to effectively determine whether the first bypass pipe of the liquid level detection system is blocked, trigger or not trigger the alarm, and then monitor the blockage situation, provide blockage alarm information, facilitate timely unblocking of the pipeline of the liquid level detection system, avoid the problem of low liquid level monitoring failure or inaccurate measurement, and improve the accuracy of liquid level monitoring.

Preferably, the blockage alarm method further includes the following steps: S5: after the blockage fault is eliminated, restart the liquid level detection system, reset the first alarm, and return the timing of the first liquid inlet timer and the second liquid inlet timer to zero.

As a preferred solution of the present invention, by setting step S5, the first alarm can be in the initial working state after the liquid level detection system is restarted, so that the first liquid inlet timer and the second liquid inlet timer can accurately time, avoiding the occurrence of alarm errors due to data superposition, and further improving the reliability of the liquid level monitoring process.

Preferably, step S2 of the blockage alarm method further includes the following step S21: determining that the first sensor obtains the first liquid level height, resetting the first alarm, and returning the timing of the first liquid inlet timer to zero.

As a preferred embodiment of the present invention, by adding step S21, it is possible to output the judgment conclusion through the output module of the alarm system without triggering the first alarm, and transmit the conclusion to the input module, execute the first alarm reset, and continue to transmit the conclusion from the input module to the calculation module, so that the timing of the first liquid inlet timer in the calculation module is reset to zero, thereby returning the alarm system to the state before the first alarm is set.

Preferably, after step S3 of the blockage alarm method, the following step S31 is also included: determining that the second liquid inlet time is within the second set liquid inlet time, and the first sensor has not acquired the first liquid level height, executing the first alarm reset, and returning the timing of the first liquid inlet timer and the second liquid inlet timer to zero.

As a preferred solution of the present invention, by adding step S31, the output module of the alarm system can output the conclusion of the judgment without triggering the first alarm, and transmit the conclusion to the input module, execute the first alarm reset, and continue to transmit the conclusion from the input module to the calculation module, so that the timing of the first liquid inlet timer and the second liquid inlet timer in the calculation module are reset to zero, so that the alarm system can return to the starting point of monitoring when it cannot trigger the first alarm.

Aiming at the problem that the blockage alarm method in the prior art cannot timely detect the blockage at the bottom of the liquid level meter, resulting in failure of low liquid level monitoring or inaccurate measurement, based on the liquid level detection system with a blockage alarm function, the liquid level detection system performs liquid level monitoring when the liquid level in the container decreases. The present invention also provides a blockage alarm method, comprising the following steps: A liquid level detection system, comprising the following steps:

T1: Identify the second liquid level heights obtained by two adjacent second sensors and the order in which the second liquid level heights are obtained through the alarm system; calculate the difference between the second liquid level height obtained later and the second liquid level height obtained earlier, and determine that the difference is less than zero, the liquid level in the container rises; determine that the difference is greater than zero, the liquid level in the container drops; set and store the set drainage time in the alarm system according to the time required for the measured liquid to flow from the third liquid level height corresponding to the second bypass pipe to the liquid level height corresponding to the first bypass pipe;

T2: determining that the first sensor obtains the third liquid level height, triggering the start of the draining time;

T3: if it is determined that the discharge time is within the set discharge time, the signal of the third liquid level height continues to exist, and the second alarm is triggered; if it is determined that the discharge time exceeds the set discharge time, the signal of the third liquid level height disappears, and the second alarm is not triggered.

The liquid level detection system of the present invention, through the above-mentioned monitoring method, provides a time reference for the liquid level to drop from the second bypass pipe to the first bypass pipe during the operation of the liquid level detection system by setting a set drainage time; and by identifying the order in which the second liquid level heights are obtained by two adjacent second sensors, the difference between the second liquid level height obtained later and the second liquid level height obtained earlier is determined to be negative, and a conclusion is drawn that the liquid level in the container has dropped; if the first sensor obtains the third liquid level height, indicating that the liquid level has dropped to the height of the second bypass pipe, the drainage timer is used to record the time after the liquid level drops to the second bypass pipe. At the moment of drainage, it is determined that the signal of the third liquid level height continues to exist or disappears within the set drainage time. If the signal of the third liquid level height continues to exist, it indicates that the second bypass pipe is blocked, triggering the second alarm; during the operation of the equipment and the continuous decrease of the liquid level, a blockage alarm reminder can also be issued, so that the staff can clear the blockage in time after receiving the alarm, monitor the liquid level when the liquid level drops during the use of the container, and effectively remind the staff, so as to timely clear the pipeline of the liquid level detection system, avoid the problem of low liquid level monitoring failure or inaccurate measurement, and improve the accuracy of liquid level monitoring.

In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

1. The liquid level detection system with a blockage alarm function is provided with at least two bypass pipes of different heights connected to the liquid level measurement chamber. If the lower one of the two adjacent bypass pipes is blocked, the first set liquid inlet time and the second set liquid inlet time are set and stored by the alarm system, and the first liquid inlet time and the second liquid inlet time are recorded respectively by the first liquid inlet timer and the second liquid inlet timer. The alarm system can determine whether the lower bypass pipe is blocked, and then choose to trigger or not trigger the first alarm, so as to alarm the blockage of the liquid level detection system, facilitate manual and timely cleaning of the blockage, realize that the liquid level monitoring device can be unblocked in time, avoid the failure of low liquid level monitoring, and improve the accuracy of liquid level monitoring.

2. The blockage alarm method of the present invention can effectively determine whether the first bypass pipe of the liquid level detection system is blocked, and trigger or not trigger an alarm, thereby being able to monitor the blockage situation, provide blockage alarm information at the beginning of liquid level monitoring or during liquid level monitoring, and facilitate the staff to clear the pipeline of the liquid level detection system in time, avoid the problem of low liquid level monitoring failure or inaccurate measurement, thereby improving the accuracy of liquid level monitoring;

3. Another blockage alarm method described in the present invention can monitor whether the liquid level meter is blocked during the process of the container liquid level dropping, and can output alarm information of the blockage of the liquid level meter through the alarm system, which can remind the staff during the process of the container liquid level dropping, avoiding the problem of low liquid level monitoring failure or inaccurate measurement, thereby improving the accuracy of liquid level monitoring.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a liquid level detection system with a blockage alarm function according to the present invention;

FIG2 is a schematic diagram of the module structure of the alarm system of the present invention;

FIG3 is a flow chart of the operation logic of the blocking alarm method of the present invention;

FIG4 is a flow chart b of the operation logic of the blocking alarm method of the present invention;

Icons: 0, container; 1, liquid level gauge; 2, alarm system; 31, first bypass pipe; 32, second bypass pipe; 11, liquid level measurement chamber; 12, first sensor; 13, second sensor; 4, transmitter.

DETAILED DESCRIPTION

The present invention will be described in detail below in conjunction with the accompanying drawings.

In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

Example 1

As shown in FIG1 , this embodiment discloses a liquid level detection system with a blockage alarm function, comprising: a liquid level meter 1, an alarm system 2, and at least two bypass pipes; the two bypass pipes are used to communicate with one end of the container 0 at an equal height, and the two bypass pipes are used to communicate with one end of the liquid level measurement chamber 11 of the liquid level meter 1 at different heights, the lowest of the two bypass pipes is the first bypass pipe 31, and the second bypass pipe 32 is successively higher than the first bypass pipe 31; a first sensor 12 adjacent to the second bypass pipe 32 and higher than the second bypass pipe 32 is provided in the liquid level measurement chamber 11 of the liquid level meter 1, the first sensor 12 is used to obtain a first liquid level height, and an electrical signal of the first sensor 12 is connected to the alarm System 2, and then can transmit the first liquid level height to the alarm system 2; the alarm system 2 is provided with a first alarm, a first liquid inlet timer, and a second liquid inlet timer; the alarm system 2 can set and store a first set liquid inlet time and a second set liquid inlet time; the first liquid inlet timer is used to record the first liquid inlet moment after the liquid level detection system starts to run; the second liquid inlet timer is used to record the second liquid inlet moment after the first liquid inlet timer stops timing; the alarm system 2 can determine whether the first bypass pipe 31 is blocked or not according to the first liquid level height, the first set liquid inlet time, the second set liquid inlet time, the first liquid inlet moment and the second liquid inlet moment, and then trigger or not trigger the first alarm.

It should be noted that the first set liquid inlet time is understood as: the time usually required from the start of the liquid level detection system to the time when the first bypass pipe 31 is filled with liquid and the liquid level reaches the height of the first sensor 12; the second set liquid inlet time is understood as: the time usually required for the second bypass pipe 32 to be filled with liquid and the liquid level reaches the height of the first sensor 12 after the first set liquid inlet time; in actual use of the liquid level detection system, the first set liquid inlet time can be measured by experiment when the first bypass pipe 31 is usually not blocked. Similarly, when the first bypass pipe 31 is blocked, the first set liquid inlet time can be measured by experiment when the liquid level detection system is opened for operation. The difference between the liquid inlet time measured by the first sensor 12 and the first set liquid inlet time is the second set liquid inlet time; according to actual use, the second set liquid inlet time is usually half of the first set liquid inlet time, for example, the first set liquid inlet time is set to one minute, and the second set liquid inlet time is set to thirty seconds; and the first liquid inlet timer is used to record the first liquid inlet moment of the first bypass pipe 31, and the first liquid inlet timer can be understood as a short timer, and the second liquid inlet timer is used to record the second liquid inlet moment of the second bypass pipe 32, and the second liquid inlet timer can be understood as a long timer.

It should be noted that, as shown in reference figure 2, the alarm system 2 comprises an input module, a storage module, a calculation module, an output module and a control module. The first set liquid inlet time and the second set liquid inlet time can be input into the alarm system 2 through the input module, and the input data can be stored through the storage module; and the first liquid inlet timer, the second liquid inlet timer and the liquid discharge timer are all arranged in the storage module, so as to be able to time and store the recorded moments; the electrical signal of the integrated component of the first alarm is connected to the control module, the conclusion is obtained through calculation and determination by the calculation module, and transmitted to the control module, and the output module is controlled by the control module to trigger the alarm light of the first alarm to send out an alarm signal.

In this embodiment, as shown in Figure 1, the liquid level measuring chamber 11 is provided with a plurality of second sensors 13 arranged in equidistant heights; the electrical signals of the second sensors 13 are connected to the alarm system 2; the electrical signals of the alarm system 2 are connected to the equipment operation platform, and the discharge of the container 0 can be controlled through the equipment operation platform. It should be noted that the equipment operation platform is understood as a control system that is usually configured for the container 0 or the condensation tank to provide basic guarantees for the normal operation of the equipment.

As shown in FIG. 2 , the alarm system 2 can receive the first liquid level height obtained by the second sensor 13 , and identify the order in which two adjacent second sensors 13 obtain the first liquid level heights, and thus can determine whether the liquid level in the container 0 rises or falls.

In this embodiment, the alarm system 2 usually has a calculation unit, which can identify the moment when two adjacent second sensors 13 obtain the second liquid level height, so as to determine the order in which the two adjacent second sensors 13 obtain the second liquid level height. The calculation unit calculates the difference between the values of the second liquid level heights obtained successively and the value of the second liquid level height obtained earlier. If the difference is less than zero, it indicates that the liquid level has dropped, and if the difference is greater than zero, it indicates that the liquid level has risen, thereby being able to determine that the liquid level has dropped.

On the basis of being provided with a second sensor 13, it is recognized that the liquid level in the container 0 monitored by the liquid level detection system is in a decreasing state. Specifically, the alarm system 2 is provided with a second alarm and a drainage timer. The first sensor 12 is also used to obtain a third liquid level height. The alarm system 2 can set and store a set drainage time; the drainage timer is used to record the drainage time after the liquid level drops to the second bypass pipe 32; the alarm system 2 can determine whether the signal of the third liquid level height obtained by the first sensor 12 within the set drainage time continues to exist or disappears according to the set drainage time and drainage time, and thereby trigger or not trigger the second alarm.

It should be noted that, as shown in Figure 1, the first sensor 12 and the second sensor 13 can obtain the liquid level height by being installed around the liquid level measuring cavity 11, and by measuring the position of the float in the liquid level measuring cavity 11, thereby measuring the first liquid level height, the second liquid level height and the third liquid level height.

Since the first alarm and the second alarm cannot be triggered at the same time, the display method outside the system is through an alarm light of the alarm system 2. The first alarm and the second alarm are understood as the passage alarm path integration unit inside the alarm system 2. Figure 1 no longer shows the first alarm and the second alarm. As shown in Figure 1, the first alarm or the second alarm realizes alarm output and display by displaying the alarm light.

It should be noted that although the lower bypass pipe can output an alarm after being blocked, for example, the first bypass pipe 31 will output an alarm after being blocked, but since the second bypass pipe 32 can still pass liquid, the blockage alarm of the alarm system 2 will not affect the normal monitoring of the liquid level detection system at a liquid level higher than the second bypass pipe 32.

It should be noted that, referring to FIG. 1 , the liquid level meter 1 is understood to include a liquid level measurement cavity 11 and is a device capable of realizing liquid level measurement, such as a magnetic flap liquid level meter 1, including components such as a float and a magnetic display roller row.

Specifically, the liquid level detection system with a blockage alarm function of the present invention further includes a transmitter 4 , the first sensor 12 is a magnetostrictive sensor, and the transmitter 4 is used to convert the liquid level height obtained by the first sensor 12 into an analog signal and transmit it to the alarm system 2 .

Example 2

Based on Example 1, using a liquid level detection system with a blockage alarm function, this embodiment discloses a blockage alarm method, comprising the following steps:

S1: according to the time from when the liquid level detection system starts to run to when the first bypass pipe 31 can flow liquid into the liquid level measurement chamber 11 and the liquid level is monitored by the first sensor 12, a first set liquid flow time is set and stored; according to the time from when the second bypass pipe 32 flows from the first set liquid flow time to when the liquid flow height reaches the first sensor 12, a second set liquid flow time is set;

S2: When the liquid level detection system starts to operate, the first liquid inlet timer is triggered to start timing; the first liquid level height is obtained through the first sensor 12; it is determined that the first liquid inlet time is within the first set liquid inlet time, and the first sensor 12 obtains the first liquid level height, and the first alarm is not triggered;

S3: It is determined that the first liquid inlet time exceeds the first set liquid inlet time, and the first sensor 12 does not obtain the first liquid level height, and the second liquid inlet timer is triggered to start timing;

S4: Determine that the second liquid inlet time is within the second set liquid inlet time, and the first sensor 12 obtains the first liquid level height, and triggers the first alarm;

It should be noted that triggering the first alarm to alarm is understood as the first alarm outputting an alarm and displaying and reminding the staff, such as outputting an alarm light with an alarm prompt sound or a striking color prompt.

In this embodiment, the blockage alarm method further includes the following steps: S5: after the blockage fault is eliminated, restart the liquid level detection system, reset the first alarm, and return the timing of the first liquid inlet timer and the second liquid inlet timer to zero.

Specifically, Figure 3 shows a logical flow chart of the operation of the blockage alarm method of the invention. The pipeline or condensation tank equipment of container 0 starts to operate. Before the liquid level detection system starts to operate, the first set liquid inlet time and the second set liquid inlet time are set and stored. The liquid level detection system starts to operate. Since much water or condensed water has not been stored in container 0, the liquid level in container 0 and the liquid level in the liquid level measurement chamber 11 are both counted as zero at this time. The alarm system 2 chooses to enter the alarm path of the first alarm, sets the first alarm, and starts timing the first liquid inlet time. The first sensor 12 does not obtain a liquid level height signal within the first set liquid inlet time, triggering the long timer to start timing. The moment recorded by the long timer is within the second set liquid inlet time. The first sensor 12 obtains a liquid level height signal, triggering the first alarm to alarm, thereby outputting an alarm.

In this embodiment, referring to FIG. 2 , step S2 of the blockage alarm method further includes the following step S21: determining whether the first sensor 12 obtains a first liquid level height, resetting the first alarm, and returning the timing of the first liquid inlet timer to zero.

Specifically, as shown in reference figure 2, after step S3 of the blockage alarm method, the following step S31 is also included: determining that the first sensor 12 does not obtain the first liquid level height at the second liquid inlet time within the second set liquid inlet time, resetting the first alarm, and returning the timing of the first liquid inlet timer and the second liquid inlet timer to zero.

It should be noted that resetting the first alarm or resetting the second alarm is understood relative to setting the first alarm or setting the second alarm, and can be understood as re-entering the connection path and control state of the first alarm or the second alarm to achieve the first alarm or the second alarm being in the set state again.

Example 3

In order to enable the liquid level detection system to monitor the liquid level when the liquid level in the container 0 decreases, based on Example 1 or Example 2, this embodiment discloses a blockage alarm method, which specifically includes the following steps:

T1: Identify the second liquid level heights obtained by two adjacent second sensors 13 and the order in which the second liquid level heights are obtained through the alarm system 2; calculate the difference between the second liquid level height obtained later and the second liquid level height obtained earlier, and if the difference is less than zero, the liquid level in the container 0 rises; if the difference is greater than zero, the liquid level in the container 0 drops; set and store the set drainage time in the alarm system 2 according to the time required for the measured liquid to drop from the third liquid level height to the liquid level height corresponding to the first bypass pipe 31;

T2: determining that the first sensor 12 obtains a third liquid level height, triggering the drain timer to start timing;

T3: If the discharge time is within the set discharge time, the signal of the third liquid level height continues to exist, triggering the second alarm; if the discharge time is equal to or exceeds the set discharge time, the signal of the third liquid level height disappears, and the second alarm is not triggered.

Specifically, in combination with the alarm operation logic flow chart of the second alarm as shown in Figure 4, the second liquid level height data of the second sensor 13 obtained by the storage unit of the alarm system 2 is transmitted to the calculation unit, and the calculation unit can compare the difference between the second liquid level height obtained later and the second liquid level height obtained earlier, and then determine whether the liquid in the liquid level measurement chamber 11 is rising or falling, and output a falling signal to set the second alarm, so that the alarm system 2 can enter the alarm function of executing the second alarm.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A liquid level detection system with a blockage alarm function, characterized in that it comprises: a liquid level meter (1), an alarm system (2) and at least two bypass pipes; the two bypass pipes have one end connected to the container (0) at the same height, and the two bypass pipes have one end connected to the liquid level measurement chamber (11) of the liquid level meter (1) at different heights; the bypass pipe with the lowest height among the two bypass pipes is a first bypass pipe (31), and the bypass pipes with successively higher height than the first bypass pipe (31) are second bypass pipes (32); A first sensor (12) is provided in the liquid level measuring chamber (11) of the liquid level meter (1), which is adjacent to the second bypass pipe (32) and higher than the second bypass pipe (32); the first sensor (12) is used to obtain a first liquid level height; an electrical signal of the first sensor (12) is connected to the alarm system (2), so that the first liquid level height can be transmitted to the alarm system (2); the alarm system (2) is provided with a first alarm, a first liquid inlet timer, and a second liquid inlet timer; the alarm system (2) can set and store a first set liquid inlet time and a second set liquid inlet time; The first liquid inlet timer is used to record the first liquid inlet time after the liquid level detection system starts to operate; the second liquid inlet timer is used to record the second liquid inlet time after the first liquid inlet timer stops timing; the alarm system (2) can determine whether the first bypass pipe (31) is blocked or not, and thus trigger or not trigger the first alarm according to the first liquid level height, the first set liquid inlet time, the second set liquid inlet time, the first liquid inlet time and the second liquid inlet time. 2. According to claim 1, the liquid level detection system with a blockage alarm function is characterized in that the liquid level measuring chamber (11) is provided with a plurality of second sensors (13) arranged in an equidistant arrangement in height; the electrical signal of the second sensor (13) is connected to the alarm system (2); the electrical signal of the alarm system (2) is connected to the equipment operation platform, and the discharge of the container (0) can be controlled through the equipment operation platform. 3. The liquid level detection system with a blockage alarm function according to claim 2 is characterized in that the alarm system (2) is able to receive the second liquid level height obtained by the second sensor (13), and identify the order in which two adjacent second sensors (13) obtain the second liquid level heights, thereby being able to determine whether the liquid level in the container (0) rises or falls. 4. The liquid level detection system with a blockage alarm function according to claim 3 is characterized in that the alarm system (2) is provided with a second alarm and a drainage timer, the first sensor (12) is also used to obtain a third liquid level height, and the alarm system (2) can set and store a set drainage time; the drainage timer is used to record the drainage time after the liquid level drops to the second bypass pipe (32); the alarm system (2) can determine whether the signal of the third liquid level height obtained by the first sensor (12) within the set drainage time continues to exist or disappears according to the set drainage time and drainage time, and thereby trigger or not trigger the second alarm. 5. The liquid level detection system with a blockage alarm function according to claim 1 is characterized in that it also includes a transmitter (4), the first sensor (12) is a magnetostrictive sensor, and the transmitter (4) is used to convert the liquid level height obtained by the first sensor (12) into an analog signal and transmit it to the alarm system (2). 6. A blockage alarm method for a liquid level detection system with a blockage alarm function according to any one of claims 1 to 5, characterized in that it comprises the following steps: S1: according to the time from when the liquid level detection system starts to operate to when the first bypass pipe (31) can flow liquid into the liquid level measurement chamber (11) and the liquid level is detected by the first sensor (12), a first set liquid flow time is set and stored; according to the time from when the second bypass pipe (32) starts to flow liquid after the first set liquid flow time to when the liquid flow height reaches the first sensor (12), a second set liquid flow time is set; S2: When the liquid level detection system starts to operate, a first liquid inlet timer is triggered to start timing; a first liquid level height is obtained through the first sensor (12); it is determined that the first liquid inlet time is within the first set liquid inlet time, and the first sensor (12) obtains the first liquid level height, and the first alarm is not triggered; S3: determining that the first liquid inlet time exceeds the first set liquid inlet time, and the first sensor (12) has not obtained the first liquid level height, triggering the second liquid inlet timer to start timing; S4: determining that the second liquid inlet time is within the second set liquid inlet time, and the first sensor (12) obtains the first liquid level height, and triggering the first alarm. 7. The blockage alarm method according to claim 6 is characterized in that it also includes the following steps: S5: After the blockage fault is eliminated, restart the liquid level detection system, reset the first alarm, and return the timing of the first liquid inlet timer and the second liquid inlet timer to zero. 8. The blockage alarm method according to claim 6 is characterized in that step S2 also includes the following step S21: determining that the first sensor (12) obtains the first liquid level height, executing the first alarm reset, so that the timing of the first liquid inlet timer is reset to zero. 9. The blockage alarm method according to claim 6 is characterized in that, after step S3, it also includes the following step S31: determining that the second liquid inlet time is within the second set liquid inlet time, and the first sensor (12) has not obtained the first liquid level height, resetting the first alarm, and returning the timing of the first liquid inlet timer and the second liquid inlet timer to zero. 10. A clogging alarm method for a liquid level detection system with a clogging alarm function as claimed in claim 4, comprising the following steps: T1: identifying the second liquid level heights obtained by two adjacent second sensors (13) and the order in which the second liquid level heights are obtained through the alarm system (2); calculating the difference between the second liquid level height obtained later and the second liquid level height obtained earlier, and determining that the difference is less than zero, the liquid level in the container (0) rises; determining that the difference is greater than zero, the liquid level in the container (0) drops; and setting and storing a set liquid discharge time in the alarm system (2) according to the time required for the measured liquid to drop from the third liquid level height to the liquid level height corresponding to the first bypass pipe (31); T2: determining that the first sensor (12) obtains the third liquid level height, triggering the liquid discharge timer to start timing; T3: if it is determined that the discharge time is within the set discharge time, the signal of the third liquid level height continues to exist, and the second alarm is triggered; if it is determined that the discharge time is equal to or exceeds the set discharge time, the signal of the third liquid level height disappears, and the second alarm is not triggered.