CN113432862B - Exhaust valve overflow detection method and system - Google Patents
Exhaust valve overflow detection method and system Download PDFInfo
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- CN113432862B CN113432862B CN202110606286.8A CN202110606286A CN113432862B CN 113432862 B CN113432862 B CN 113432862B CN 202110606286 A CN202110606286 A CN 202110606286A CN 113432862 B CN113432862 B CN 113432862B
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Abstract
The invention discloses an exhaust valve overflow detection method and system, which detect the total amount of overflow water of an overflow detection device corresponding to a pipeline; when the total amount of the overflow water reaches a first preset water amount, generating a first electrode signal and triggering an overflow alarm device; when the total amount of the overflow water reaches a second preset water amount, generating a second electrode signal; wherein the second preset water amount is larger than the first preset water amount; and when the first electrode signal and the second electrode signal exist simultaneously, detecting the state of the exhaust valve of the pipeline, if the state of the exhaust valve of the pipeline is open, generating a preset valve closing signal, controlling the exhaust valve of the pipeline to close, and stopping triggering the overflow alarm device. Compared with the prior art, the method reduces the dependence on manpower and improves the automation level of a factory.
Description
Technical Field
The invention relates to the technical field of overflow detection, in particular to a method and a system for detecting overflow of an exhaust valve.
Background
When the pipeline water injection, because can have a certain amount of gas in the pipeline in the thermal power factory start-up phase, if do not carry out pipeline exhaust-gas treatment, when the drainage, these gas can gather in the eminence of pipeline, influence the flow of water, cause certain influence to the water injection process. Therefore, exhaust valves are arranged at the high points of pipelines of a condensation water system, a water supply system and a closed cooling water system of a thermal power plant. And current discharge valve needs manual control switch, consequently at the in-process of pipeline water injection, need arrange operating personnel according to the pipeline water injection condition, fills when the pipeline, and discharge valve overflow back, the manual discharge valve that closes. And because the restriction of water injection time and pipeline distance, need many operating personnel to manage the discharge valve simultaneously, it is higher to the artifical dependence, work efficiency is low.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the exhaust valve overflow detection method and system are provided, dependence on manpower is reduced, and the automation level of a factory is improved.
In order to solve the above technical problem, the present invention provides a method and a system for detecting overflow of an exhaust valve, including:
detecting the total amount of overflow water of an overflow detection device corresponding to the pipeline;
when the total amount of the overflow water reaches a first preset water amount, generating a first electrode signal and triggering an overflow alarm device;
when the total amount of the overflow water reaches a second preset water amount, generating a second electrode signal; wherein the second preset water amount is larger than the first preset water amount;
and when the first electrode signal and the second electrode signal exist simultaneously, detecting the state of the exhaust valve of the pipeline, if the state of the exhaust valve of the pipeline is open, generating a preset valve closing signal, controlling the exhaust valve of the pipeline to close, and stopping triggering the overflow alarm device.
Further, before the overflow water total amount of the overflow detection device that the detection pipeline corresponds to, still include:
acquiring the first preset water quantity, the second preset water quantity and a state signal of an exhaust valve switch of the pipeline;
and detecting the water injection condition of the pipeline, and controlling an exhaust valve of the pipeline to keep a normally open state when the pipeline is injected with water.
Further, when overflow water total volume reaches first predetermined water yield, generate first electrode signal, trigger overflow alarm device, specifically do:
and a first trigger is arranged at the first preset water quantity, and when the total quantity of the overflow water reaches the first preset water quantity, the signal generation device is switched on to generate a first electrode signal and trigger overflow alarm.
Further, before detecting the state of the exhaust valve of the pipeline, the method further comprises:
and carrying out time delay processing on the duration time of the first electrode signal and the second electrode signal, and carrying out filtering processing on the first electrode signal and the second electrode signal within preset time delay.
Further, a preset valve closing signal is generated, specifically:
and when the exhaust valve is in an opening state, performing pulse conversion on the processed first electrode signal and the second electrode signal to generate a valve closing signal with a preset pulse width.
Further, the present invention also provides an exhaust valve overflow detection system, comprising: the device comprises a controller, an exhaust valve overflow detection device and an exhaust valve;
wherein the controller executes the exhaust valve overflow detection method of the present invention;
the controller comprises a first AND gate module, a second AND gate module, a delay module, an RS trigger, an overflow module, a NOT gate module, a pulse module and a closing instruction generating module;
the exhaust valve overflow detection device comprises a first trigger and a second trigger;
the exhaust valve comprises a full-open trigger and a full-close trigger;
the controller passes through discharge valve overflow detection device's first trigger and second trigger with discharge valve overflow detection device is connected, the controller passes through discharge valve's full-on trigger and full-off trigger with discharge valve is connected, the water pipe is connected to discharge valve's one end, discharge valve's the other end is connected discharge valve overflow detection device.
Further, the controller through discharge valve overflow detection device's first trigger and second trigger with discharge valve overflow detection device is connected, specifically does:
the first trigger is connected with the S end of the RS trigger;
the first trigger and the second trigger are connected with the first end of the first AND gate module.
Further, the controller is connected with the exhaust valve through a full-open trigger and a full-close trigger of the exhaust valve, and specifically comprises:
the fully-open trigger is connected with the first end of the second AND gate module;
the fully-closed trigger is connected with the R end triggered by the RS, and the fully-closed trigger is connected with the first end of the NOT gate module;
the full-on trigger and the full-off trigger are in parallel connection.
Further, the controller includes a first and gate module, a second and gate module, a delay module, an RS trigger, an overflow module, a not gate module, a pulse module, and a closing instruction generation module, and specifically includes:
the S end of the RS trigger is connected with an overflow alarm module;
the second end of the NOT gate is connected with the first end of the second AND gate module;
the second end of the first AND gate module is connected with the first end of the delay module, and the second end of the delay module is connected with the first end of the second AND gate module;
and the second end of the second AND gate module is connected with the first end of the pulse module, and the second end of the pulse module is connected with the first end of the closing instruction generation module.
Compared with the prior art, the overflow detection method for the exhaust valve has the following beneficial effects:
the total amount of overflow water of an overflow detection device corresponding to the detection pipeline is detected; when the total amount of the overflow water reaches a first preset water amount, generating a first electrode signal and triggering an overflow alarm device; when the total amount of the overflow water reaches a second preset water amount, generating a second electrode signal; wherein the second preset water amount is larger than the first preset water amount; when the first electrode signal and the second electrode signal exist simultaneously, the state of the exhaust valve of the pipeline is detected, if the state of the exhaust valve of the pipeline is open, a preset valve closing signal is generated, the exhaust valve of the pipeline is controlled to be closed, and the overflow alarm device is stopped to be triggered. The invention realizes process automation in the overflow detection process, does not need personnel participation, reduces dependence on manpower and improves the automation level of factories.
Drawings
FIG. 1 is a schematic flow chart diagram illustrating an embodiment of a vent valve overflow detection method provided by the present invention;
FIG. 2 is a schematic diagram of an embodiment of a vent valve overflow detection system provided by the present invention;
fig. 3 is a schematic circuit diagram of an embodiment of an exhaust valve overflow detection system according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
Example 1
Referring to fig. 1, fig. 1 is a schematic flow chart of an embodiment of a method for detecting overflow of an exhaust valve according to the present invention, as shown in fig. 1, the method includes steps 101 to 104, specifically as follows:
step 101: and detecting the total amount of overflow water of the overflow detection device corresponding to the pipeline.
In this embodiment, before the overflow water total amount of the overflow detection device that the detection pipeline corresponds, still include: acquiring the first preset water quantity, the second preset water quantity and a state signal of an exhaust valve switch of the pipeline, and using the state signal to know the state of the pipeline before water injection; detecting the water injection condition of the pipeline, controlling the exhaust valve of the pipeline to keep a normally open state when the pipeline is filled with water, and when the pipeline is full of water, the overflow water in the pipeline enters the overflow detection device corresponding to the pipeline through the exhaust valve keeping the normally open state, and the total amount of the overflow water in the overflow detection device corresponding to the pipeline is measured.
Step 102: and when the total amount of the overflow water reaches a first preset water amount, generating a first electrode signal and triggering an overflow alarm device.
In this embodiment, a first preset water amount is set in the overflow detection device corresponding to the pipeline, and a first trigger is installed at the first preset water amount, when the total amount of overflow water in the pipeline reaches the first preset water amount set in the overflow detection device corresponding to the pipeline, the first trigger is turned on to generate a first electrode signal, the first electrode signal is transmitted to the control system, and when the control system receives the signal, the control system triggers the overflow alarm module and displays the signal on a display where a system operator is located, so as to remind the system operator.
Step 103: when the total amount of the overflow water reaches a second preset water amount, generating a second electrode signal; wherein the second preset water amount is larger than the first preset water amount.
In this embodiment, a second preset water amount is further disposed in the overflow detection device corresponding to the pipeline, and a second trigger is also installed at the second preset water amount, when the total amount of the overflow water in the pipeline reaches the second preset water amount set in the overflow detection device corresponding to the pipeline, the second trigger is turned on to generate a second electrode signal, and the second preset water amount is greater than the first preset water amount.
Step 104: and when the first electrode signal and the second electrode signal exist simultaneously, detecting the state of the exhaust valve of the pipeline, if the state of the exhaust valve of the pipeline is open, generating a preset valve closing signal, controlling the exhaust valve of the pipeline to close, and stopping triggering the overflow alarm device.
In this embodiment, when the total amount of overflow water of the overflow detection device corresponding to the pipeline is sufficiently large, the total amount of overflow water exceeds the first preset water amount and the second preset water amount in the overflow detection device, therefore, the first electrode signal and the second electrode signal are generated at the first preset water amount and the second preset water amount, the first electrode signal and the second electrode signal exist at the same time, and in order to avoid the overflow water of the overflow detection device corresponding to the pipeline from shaking, and thus, false triggering of a first trigger at the first preset water amount and a second trigger at the second preset water amount is caused, the first electrode signal and the second electrode signal are subjected to delay processing on the durations of the first electrode signal and the second electrode signal by a delay module, and the first electrode signal and the second electrode signal are subjected to filtering processing within a preset delay time, if the durations of the first electrode signal and the second electrode signal are greater than the preset delay time, the removal of the first electrode signal and the second electrode signal is specifically set as a filtering effect, s 3 is determined by the false triggering effect of the preset electrode signal; at this time, because the water in the pipeline is filled, the pipeline does not need to be exhausted, the control system detects the state of an exhaust valve of the pipeline, when the exhaust valve pipeline is opened, the processed first electrode signal and the second electrode signal are subjected to pulse conversion to generate a valve closing signal with a preset pulse width, and the exhaust valve of the pipeline is controlled to be closed, in this embodiment, the preset pulse width is 0.5s, a specific set value of the preset pulse width is determined by the control requirement of the exhaust valve, when the exhaust valve is closed, a response signal is generated and sent to the control system, and the control system stops triggering the overflow alarm module after receiving a relevant signal.
As another example of this embodiment, the number of the preset water amounts set in the overflow detection device corresponding to the pipeline may be changed according to a requirement, the first preset water amount and the second preset water amount set in the overflow detection device corresponding to the pipeline may also be set as a single preset water amount or three or more preset water amounts, when a single preset water amount is set in the overflow detection device corresponding to the pipeline, the trigger installed at the single preset water amount implements an overflow alarm and an operation of simultaneously closing the exhaust valve after the trigger generates a corresponding electrode signal; when three or more than three preset water quantities are set in the overflow detection device corresponding to the pipeline, the trigger corresponding to the preset water quantities is used for generating corresponding electrode signals and respectively realizing overflow alarm and closing operation of the exhaust valve.
In this embodiment 1, the total amount of overflow water of the overflow detection device corresponding to the detection pipeline is detected; when the total amount of the overflow water reaches a first preset water amount, generating a first electrode signal and triggering an overflow alarm device; when the total amount of the overflow water reaches a second preset water amount, generating a second electrode signal; the second preset water amount is larger than the first preset water amount; and when the first electrode signal and the second electrode signal exist simultaneously, detecting the state of the exhaust valve of the pipeline, if the state of the exhaust valve of the pipeline is open, generating a preset valve closing signal, controlling the exhaust valve of the pipeline to close, and stopping triggering the overflow alarm device. The exhaust valve overflow detection method provided by the embodiment 1 reduces the dependence on human labor, and improves the automation level of a factory.
Example 2
Referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of an exhaust valve overflow detection system provided by the present invention, and as shown in fig. 2, the structure includes a controller, an exhaust valve overflow detection device, and an exhaust valve, specifically as follows:
in this embodiment, the controller executes the exhaust valve overflow detection method described in embodiment 1; the exhaust valve overflow detection device comprises a first trigger and a second trigger; the exhaust valve comprises a full-open trigger and a full-close trigger; the controller passes through discharge valve overflow detection device's first trigger and second trigger with discharge valve overflow detection device is connected, the controller passes through discharge valve's full-on trigger and full-off trigger with discharge valve is connected, discharge valve's one end is connected discharge valve overflow detection device, the water pipe is connected to discharge valve's the other end, in this embodiment, the position of connecting the water pipe is the eminence of water pipe.
As another example of this embodiment, the number of the triggers disposed in the exhaust valve overflow detecting device may be changed according to a requirement, the first trigger and the second trigger disposed in the exhaust valve overflow detecting device may also be set as a single trigger or three or more triggers, and when the single trigger is disposed in the exhaust valve overflow detecting device, the single trigger generates a corresponding electrode signal to implement an overflow alarm and an operation of closing the exhaust valve at the same time; when three or more triggers are arranged in the exhaust valve overflow detection device, the three or more triggers are used for generating corresponding electrode signals and respectively realizing overflow alarm and exhaust valve closing operation.
Referring to fig. 3, fig. 3 is a schematic circuit structure diagram of an embodiment of an exhaust valve overflow detection system provided by the present invention, and as shown in fig. 3, the circuit structure is specifically as follows:
in this embodiment, the controller 201 includes a first and gate module, a second and gate module, a delay module, an RS flip-flop, an overflow module, a not gate module, a pulse module, and a closing instruction generating module.
In this embodiment, the first trigger is connected with the S end of the RS trigger, and when the total amount of overflow water in the pipeline reaches a first preset water level, the first trigger is turned on, and the S end of the RS trigger is triggered to be turned on after the first trigger is turned on; the S end of the RS trigger is connected with an overflow alarm module, and after the S end of the RS trigger is conducted, the overflow alarm module correspondingly sends out an alarm prompt; in this embodiment, the alarm prompt selects a mode of displaying a corresponding alarm prompt on the computer terminal of the operator, but it can be understood that the alarm prompt can also select a mode of turning on a warning light or other prompt modes capable of realizing the same function;
in this embodiment, the first and second flip-flops are connected to a first end of the first and gate module; when the total amount of overflow water in the pipeline reaches a second preset water amount, the second trigger is triggered to generate a second electrode signal, the first electrode signal and the second electrode signal pass through the first AND gate module to output a first AND gate output signal, and when the first electrode signal and the second electrode signal exist, the output signals of the first and gate signal and the second electrode signal are both marked as 1, so that the output signal of the first AND gate is also marked as 1.
In this embodiment, the second end of the first and gate module is connected to the first end of the delay module, and the second end of the delay module is connected to the first end of the second and gate module; the second end of the first AND gate module transmits the first AND gate output signal to the delay module, the delay module presets delay time, the first AND gate output signal is subjected to delay filtering processing within the preset time, if the duration of the first AND gate output signal is greater than the preset delay time t1, the delay module also outputs a delay output signal which is marked as 1, and then the delay output signal is transmitted to a second AND gate module; in this embodiment, the preset delay time t1 is set to 3s, a specific set value of the preset delay time is determined by the anti-shake filtering effect, and the delay module performs delay filtering to avoid that the output signal of the first and gate is a false trigger signal.
In this embodiment, the fully-open trigger is connected to the first end of the second and gate module; the full-off trigger is connected with the first end of the NOT gate module; the second end of the NOT gate is connected with the first end of the second AND gate module; the state of the full-on trigger is sent to a second AND gate module, the state of the full-off trigger is sent to a non-gate module, and a signal output by the non-gate module is sent to the second AND gate module; when the full-on trigger is closed, the full-off trigger is opened.
In this embodiment, the second end of the second and gate module is connected to the first end of the pulse module, the second end of the pulse module is connected to the first end of the close instruction generation module, and the totally-off trigger is connected to the R end triggered by the RS; the second and gate module comprises a first electrode signal and a second electrode signal which are input by the delay module and subjected to delay filtering processing, and states of a full-on trigger and a full-off trigger, if the first electrode signal and the second electrode signal which are input by the delay module exist at the same time in the second and gate module, the state of the full-on trigger is on, the state of the full-off trigger is off, the second and gate module generates a second and gate output signal, the second and gate output signal generated by the second and gate module is subjected to a pulse module, the pulse module performs pulse conversion on the second and gate output signal, a closing instruction with a pulse width of preset width t2 is formed in the closing instruction generation module, the closing instruction is transmitted to the exhaust valve for closing the valve, the state of the full-off trigger is on after the valve is closed, the second and gate module does not output a new second and gate output signal, and the full-off trigger is connected with the R end of the RS trigger to stop triggering the overflow alarm module; in the present embodiment, the preset pulse width t2 is set to 0.5s, and the specific set value thereof is determined by the control requirement of the exhaust valve.
The structural schematic diagram of an embodiment of the exhaust valve overflow detection system provided in this embodiment 2 is that, on the basis of the exhaust valve overflow detection method provided in embodiment 1, a related hardware structure is added to implement the exhaust valve overflow detection method provided in embodiment 1, and by embodying a specific hardware structure, it is demonstrated that the dependency of the present invention on manual work is reduced, and the automation level of a factory is improved.
In summary, according to the method and the system for detecting the overflow of the exhaust valve provided by the invention, the total amount of overflow water of the overflow detection device corresponding to the pipeline is detected; when the total amount of the overflow water reaches a first preset water amount, generating a first electrode signal and triggering an overflow alarm device; when the total amount of the overflow water reaches a second preset water amount, generating a second electrode signal; the second preset water amount is larger than the first preset water amount; when the first electrode signal and the second electrode signal exist simultaneously, the state of the exhaust valve of the pipeline is detected, if the state of the exhaust valve of the pipeline is open, a preset valve closing signal is generated, the exhaust valve of the pipeline is controlled to be closed, and the overflow alarm device is stopped to be triggered. Compared with the prior art, the method reduces the dependence on manpower and improves the automation level of a factory.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (8)
1. An exhaust valve overflow detection method, comprising:
detecting the total amount of overflow water of an overflow detection device corresponding to the pipeline;
when the total amount of the overflow water reaches a first preset water amount, generating a first electrode signal and triggering an overflow alarm device;
when the total amount of the overflow water reaches a second preset water amount, generating a second electrode signal; wherein the second preset water amount is larger than the first preset water amount;
when the first electrode signal and the second electrode signal coexist, the first electrode signal and the second electrode signal are subjected to delay processing, the first electrode signal and the second electrode signal are subjected to filtering processing within preset delay time, if the first electrode signal and the second electrode signal are greater than the preset delay time, the first electrode signal and the second electrode signal are excluded as false trigger signals, the state of the exhaust valve of the pipeline is detected, and if the state of the exhaust valve of the pipeline is opened, a preset valve closing signal is generated, the exhaust valve of the pipeline is controlled to be closed, and the overflow alarm device is stopped to be triggered.
2. The exhaust valve overflow detection method according to claim 1, wherein before detecting the total amount of overflow water of the overflow detection device corresponding to the pipeline, the method further comprises:
acquiring the first preset water quantity, the second preset water quantity and a state signal of an exhaust valve switch of the pipeline;
and detecting the water injection condition of the pipeline, and controlling an exhaust valve of the pipeline to keep a normally open state when the pipeline is injected with water.
3. The exhaust valve overflow detection method according to claim 1, wherein when the total amount of overflow water reaches a first preset amount of water, a first electrode signal is generated to trigger an overflow alarm device, and specifically:
and a first trigger is arranged at the first preset water amount, and when the total amount of the overflow water reaches the first preset water amount, the first trigger is switched on to generate a first electrode signal and trigger overflow alarm.
4. The method for detecting exhaust valve overflow of claim 1, wherein a predetermined valve closing signal is generated, specifically:
and when the exhaust valve is in an opening state, performing pulse conversion on the processed first electrode signal and the second electrode signal to generate a valve closing signal with a preset pulse width.
5. An exhaust valve overflow detection system, comprising: the device comprises a controller, an exhaust valve overflow detection device and an exhaust valve;
wherein the controller executes the exhaust valve overflow detecting method according to any one of claims 1 to 4;
the exhaust valve overflow detection device comprises a first trigger and a second trigger;
the exhaust valve comprises a full-open trigger and a full-close trigger;
the controller passes through discharge valve overflow detection device's first trigger and second trigger with discharge valve overflow detection device is connected, the controller passes through discharge valve's full-on trigger and full-off trigger with discharge valve is connected, the water pipe is connected to discharge valve's one end, discharge valve's the other end is connected discharge valve overflow detection device.
6. The exhaust valve overflow detection system of claim 5, wherein the controller is connected to the exhaust valve overflow detection device through a first trigger and a second trigger of the exhaust valve overflow detection device, and specifically comprises:
the first trigger is connected with the S end of the RS trigger;
the first trigger and the second trigger are connected with a first end of the first AND gate module.
7. The exhaust valve overflow detection system of claim 5, wherein the controller is coupled to the exhaust valve via a full open trigger and a full close trigger of the exhaust valve, specifically:
the fully-opened trigger is connected with the first end of the second AND gate module;
the fully-closed trigger is connected with the R end of the RS trigger, and is connected with the first end of the non-gate module;
the full-on trigger and the full-off trigger are in parallel connection.
8. The exhaust valve overflow detection system of claim 5, wherein the controller comprises a first AND gate module, a second AND gate module, a delay module, an RS trigger, an overflow module, a NOT gate module, a pulse module and a closing command generation module, and specifically comprises:
the S end of the RS trigger is connected with an overflow alarm module;
the second end of the NOT gate module is connected with the first end of the second AND gate module;
the second end of the first AND gate module is connected with the first end of the delay module, and the second end of the delay module is connected with the first end of the second AND gate module;
and the second end of the second AND gate module is connected with the first end of the pulse module, and the second end of the pulse module is connected with the first end of the closing instruction generation module.
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| CN111476978A (en) * | 2020-03-31 | 2020-07-31 | 王立山 | Intelligent dry-burning prevention system and method for kitchen gas cooker |
| CN111502970A (en) * | 2020-04-20 | 2020-08-07 | 华润电力投资有限公司北方分公司 | Start-stop control method and system for top shaft oil pump and overflow electromagnetic valve |
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