CN112903924A - Nuclear power site limited space gas detection method and system - Google Patents
Nuclear power site limited space gas detection method and system Download PDFInfo
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Abstract
The invention provides a method and a system for detecting gas in a nuclear power site confined space, which relate to the technical field of safe construction, and the method comprises the following steps: s1: during operation, the robot is placed in a limited space; s2: the robot moves in a limited space; s3: acquiring gas data at the robot in real time; s4: judging whether the safety degree of the gas data is higher than a first threshold value; if yes, prompting to allow operation; s5: judging whether the safety degree of the gas data is lower than a second threshold value or not; if yes, an alarm is started to prompt evacuation, and S6 is executed; otherwise, executing S7; s6: judging whether the safety degree of the gas data is lower than a third threshold value or not; if so, generating a dangerous area, and sending an evacuation message to workers in the dangerous area; s7: and finishing the operation and recovering the robot. The invention is simple and convenient, does not need manpower management, saves labor cost, has high intelligent degree, high gas detection accuracy and good safety, and can carry out classified alarm to ensure timely and efficient alarm.
Description
Technical Field
The invention relates to the technical field of safe construction,
in particular, the invention relates to a method and a system for detecting gas in a limited space of a nuclear power site.
Background
During the construction of nuclear power plants, construction sites have many restricted spaces. The confined space refers to closed and semi-closed facilities and places (cabins, underground concealed projects, closed containers, facilities which are not used for a long time or places with poor ventilation, and the like) such as various equipment interiors (furnaces, tower kettles, tanks, bins, pools, tank wagons, pipelines, flues, and the like) of factories, tunnels, sewers, ditches, pits, wells, pools, culverts, valve rooms, sewage treatment facilities and the like of cities (including factories), wells, cellars and the like for storing substances in rural areas. The places are poor in natural ventilation, so that the operating personnel are easy to cause dangers due to the fact that toxic and harmful, flammable and explosive substances are accumulated, oxygen content is insufficient and the like, the operating personnel operate in the limited space, the dangers are extremely high, gas detection is required to be carried out at all times, and the operating personnel can be allowed to enter the limited space to operate.
The commonly used method for detecting the gas in the limited space is to arrange a special person management gas detection instrument to detect once every fixed time. For example, chinese patent invention patent CN104916082A discloses a wireless gas detection alarm system applied to a confined space, which comprises a gas detection unit and an audible and visual alarm unit, wherein the gas detection unit is connected to the audible and visual alarm unit; the gas detection unit includes: the gas detection control unit comprises a CPU, an acoustic alarm unit, a light alarm unit, a display unit, a wireless module, a gas detection sensor unit and a power supply unit; the sound and light alarm unit comprises a sound and light alarm control unit CPU, a sound alarm unit, a light alarm unit, a display unit, a wireless module and a power supply unit; the gas detection control CPU is respectively connected with an acoustic alarm unit, an optical alarm unit, a display unit, a wireless module, a gas detection sensor unit and a power supply unit; and the sound and light alarm control unit CPU is respectively connected with the sound alarm unit, the light alarm unit, the display unit, the wireless module and the power supply unit. The invention is convenient to apply and detect gas in a limited space, and utilizes the advantages of wireless communication, safe signal transmission and the like.
However, the above wireless gas detection alarm system still has the following disadvantage that after long-time use, due to time intervals, the gas detection data is prone to be inaccurate. Meanwhile, a specially-assigned person is arranged on the site for management, data detected by the gas detection unit are recorded in a traditional written record mode, real-time monitoring of the overall safety supervision state of the site is not facilitated, and the alarm is not timely when the gas detection is abnormal, so that the alarm level cannot be divided according to specific conditions.
Therefore, in order to solve the problems, it is necessary to design a reasonable nuclear power site confined space gas detection method.
Disclosure of Invention
The invention aims to provide the nuclear power field limited space gas detection method which is simple and convenient, does not need manual management, saves labor cost, has high intelligent degree, high gas detection accuracy and good safety, can carry out classified alarm when gas detection is abnormal, ensures timely and efficient alarm and has higher operation safety degree.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
a nuclear power site confined space gas detection method comprises the following steps:
s1: when an operator enters the restricted space for operation, placing the gas detection robot to the restricted space;
s2: the gas detection robot displaces in a limited space;
s3: acquiring gas data of the gas detection robot in real time, and sending the gas data to a control center outside a limited space;
s4: the control center judges whether the safety degree of the gas data is higher than a first threshold value; if yes, prompting permission of entering the limited space operation, and executing step S5; otherwise, the operation is not executed;
s5: the control center judges whether the safety degree of the gas data is lower than a second threshold value or not; if yes, an alarm arranged on the gas detection robot is started to prompt operators around the gas detection robot to evacuate, and step S6 is executed; otherwise, go to step S7;
s6: the control center judges whether the safety degree of the gas data is lower than a third threshold value or not; if so, intelligently generating a dangerous area according to the positioning and gas data of the gas detection robot, acquiring the information of the workers in the dangerous area, and sending an evacuation message to a mobile terminal of the workers in the dangerous area; otherwise, the operation is not executed;
s7: the operation personnel finish the operation, retrieve gaseous detection robot.
In a preferred embodiment of the present invention, the gas detection robot is debugged before step S1 is executed.
Preferably, in step S2, the gas detection robot is displaced according to a predetermined route and remotely controlled.
Preferably, in step S3, the connection mode of the gas detection robot to the control center includes wifi, bluetooth, 4G and 5G.
Preferably, in step S5, the second threshold is not greater than the first threshold.
Preferably, in step S5, the alarm includes an audible alarm and an optical alarm.
Preferably, in step S6, the third threshold is not greater than the second threshold.
Preferably, when step S6 is executed, if the control center determines that the safety degree of the gas data is lower than the third threshold, the control center invokes the positioning information, the gas detection data, and the instant video information of the gas detection robot, generates a safety level and an influence distance according to the gas detection data and the instant video information, generates a dangerous area with the positioning information of the gas detection robot as the center, and starts an alarm on the gas detection robot to prompt people near the gas detection robot to evacuate; meanwhile, the information of the staff in the dangerous area is obtained, and the evacuation message is sent to the mobile terminal of the staff in the dangerous area.
The invention also provides a system for detecting the gas in the limited space of the nuclear power site, which comprises:
a gas detection module;
a displacement module;
a gas data acquisition module;
a sending module;
a master control module;
a first judgment module;
a prompt module;
a second judgment module;
an alarm module;
a third judgment module;
a calculation module;
a notification module;
when an operator enters the restricted space for operation, the gas detection module is placed in the restricted space, the gas detection module is driven to displace in the restricted space through the displacement module, gas data at the gas detection module is obtained in real time through the gas data acquisition module, and the gas data is sent to the master control module outside the restricted space through the sending module; when the first judgment module on the master control module judges that the safety degree of the gas data is higher than a first threshold value, the prompting module prompts that the limited space operation is allowed to enter; when the second judgment module on the master control module judges that the safety degree of the gas data is lower than a second threshold value, an alarm module arranged on the gas detection module is started to prompt operators around the gas detection module to evacuate; when the third judgment module on the master control module judges that the safety degree of the gas data is lower than a third threshold value, the calculation module intelligently generates a dangerous area according to the positioning of the gas detection module and the gas data, acquires the information of the workers in the dangerous area, and sends an evacuation message to the mobile end of the workers in the dangerous area through the notification module until the workers complete the operation, so as to recover the gas detection robot.
Preferably, the system further comprises:
a positioning module; the gas detection module is arranged on the base and used for acquiring position information of the gas detection module;
the video information acquisition module is arranged on the gas detection module and used for acquiring video information at the gas detection module;
the positioning module and the video information acquisition module are both connected with the calculation module through the sending module; the calculation module acquires the positioning module and the video information and generates the safety level and the influence distance data at the gas detection module.
The method and the system for detecting the gas in the limited space of the nuclear power site have the beneficial effects that: simple and convenient, need not manpower management, save the cost of labor, intelligent degree is high, and gaseous detection accuracy is high, and the security is good, and when gaseous detection is unusual, the classification alarm guarantees that the alarm is timely high-efficient, and the operation safety degree is higher.
Drawings
FIG. 1 is a schematic flow chart of a method for detecting a gas in a confined space of a nuclear power plant according to the present invention;
FIG. 2 is a schematic connection diagram of a nuclear power site confined space gas detection system of the present invention.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the modules and steps set forth in these embodiments and steps do not limit the scope of the invention unless specifically stated otherwise.
Meanwhile, it should be understood that the flows in the drawings are not merely performed individually for convenience of description, but a plurality of steps are performed alternately with each other.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
The first embodiment is as follows: as shown in fig. 1, which is only one embodiment of the present invention, a method for detecting a gas in a confined space of a nuclear power plant includes the following steps:
s1: when an operator enters the restricted space for operation, placing the gas detection robot to the restricted space;
when an operator needs to enter the limited space for operation, before the operator enters the limited space, the gas detection robot is placed in the limited space, the gas detection robot is made to perform early detection, whether air in the limited space is qualified or not is mainly detected, and danger is avoided when the operator enters the limited space.
The gas detection robot is a machine having a displacement function and a gas detection instrument.
Certainly, before step S1 is executed, the gas detection robot is debugged, mainly the gas detector and the displacement function of the robot are debugged, so as to ensure the accuracy of the gas detector and the integrity of the displacement function.
S2: the gas detection robot displaces in a limited space;
the gas detection robot can carry out displacement (generally, a plurality of driving wheels and steering wheels are arranged, the driving wheels drive the displacement, and the steering wheels control the displacement direction), reaches a plurality of positions in the limited space, carries out gas detection on all main places in the limited space through the gas detection instrument, and has higher gas detection accuracy, wherein when the step S2 is executed, the displacement mode of the gas detection robot comprises displacement and remote control displacement according to a preset route. The displacement route can be preset in advance according to the space structure in the limited space, and the gas detection robot displaces according to the preset displacement route; the gas detection robot can also be controlled to move by remote control.
S3: acquiring gas data at a gas detection robot in real time, and sending the gas data to a control center outside a limited space, wherein the control center calculates a gas data safety value;
the gas detector on the gas detection robot acquires gas data of the gas detection robot in real time and remotely sends the gas data to the control center located at a safe position outside the limited space, the control center is a PC (personal computer) end, and the control center further calculates whether the gas data is qualified or not.
Here, in the step S3, the gas detection robot is connected to the control center in a manner including wifi, bluetooth, 4G, and 5G. In general, in a limited space with poor signal of a part of the network, it is preferable to use bluetooth for data transmission.
The control center calculates a gas data safety value, acquires gas data at a gas detection robot, analyzes concentration values of various harmful gases, and calculates according to a healthy standard value of each harmful gas to obtain a standard difference value sigma 0 of a ratio of a harmful gas detection value to a healthy standard value of each harmful gas;
for example, if the CO concentration obtained in real time is a1, the standard health value is a1, the concentration of SO2 is a2, the standard health value is a2, and SO on, σ 0 is the standard deviation value of values a 1/a 1, a 2/a 2, and the like;
in addition, the current position of the gas detection robot is obtained, correction values beta of all areas of the limited space are generated in advance, for example, the larger the depth of the limited space is, the smaller the correction values beta are, the lower the required harmful gas concentration is, the safety degree can be ensured, and the final gas data safety value sigma = sigma 0 × beta.
S4: the control center judges whether the safety degree of the gas data is higher than a first threshold value; if yes, prompting permission of entering the limited space operation, and executing step S5; otherwise, the operation is not executed;
the control center obtains gas data of the gas detection robot, judges according to a safety degree recording table preset in the control center, if the safety degree of the real-time gas data is higher than a first threshold value, the gas in the limited space is qualified, an operator can be allowed to enter the limited space, and the operator is prompted to operate; otherwise, if the safety degree of the gas data is lower than the first threshold value, the gas in the limited space is unqualified, the operator is not allowed to enter the limited space, the operator can not be prompted to perform operation at the moment, even the operator can be directly prompted to not allow the operator to enter the limited space to perform operation, and even the safety personnel is informed to perform gas purification operation of the limited space.
It should be noted that, as the gas detection robot moves in the restricted space, it is necessary that the safety degrees of the gas data at all the positions are higher than the first threshold value to allow the worker to enter the restricted space; on the contrary, as long as the gas data safety degree of any position is lower than the first threshold value, the operator is not allowed to enter the limited space.
S5: the control center judges whether the safety degree of the gas data is lower than a second threshold value or not; if yes, an alarm arranged on the gas detection robot is started to prompt operators around the gas detection robot to evacuate, and step S6 is executed; otherwise, go to step S7;
as the operation time of the operators is long, the gas in the limited space may change during the operation, and once the control center judges that the safety degree of the real-time gas data is lower than the second threshold value, the alarm arranged on the gas detection robot is started to prompt the operators around the gas detection robot to evacuate.
Here, the second threshold value is not greater than the first threshold value. Typically, the second threshold is slightly less than the first threshold, indicating that the atmosphere within the confined space is beginning to deteriorate, at which time the personnel within the confined space must be prompted to evacuate in a timely manner.
In step S5, the alarm device includes an audible alarm device and an optical alarm device. The acoustic alarm is generally a horn, the optical alarm is a warning lamp and flashes, and the most obvious prompt mode is used for prompting the operators in the limited space to evacuate timely.
S6: the control center judges whether the safety degree of the gas data is lower than a third threshold value or not; if so, intelligently generating a dangerous area according to the positioning and gas data of the gas detection robot, acquiring the information of the workers in the dangerous area, and sending an evacuation message to a mobile terminal of the workers in the dangerous area; otherwise, the operation is not executed;
and during or after the evacuation of the operators in the restricted space is completed, if the gas environment in the restricted space is continuously deteriorated until the safety degree of the real-time gas data is lower than a third threshold, wherein the third threshold is not larger than the second threshold. At the moment, a greater safety accident such as fire or explosion may occur, at the moment, not only the safety degree of people who are evacuating in the restricted space is low, but also workers who are located outside the restricted space or in other spaces adjacent to the first restricted space have safety hazards, but the workers may not hear the sound of the acoustic alarm and cannot see the flickering of the warning light of the optical alarm, at the moment, according to the positioning and gas data of the gas detection robot, the control center intelligently generates a dangerous area and obtains worker information in the dangerous area, and evacuation information is sent to the mobile terminals (such as interphones and working instruments) of the workers in the dangerous area to remind the related people of evacuation.
Before this, the mobile ends of all the operators need to be positioned, so that the operators in the dangerous areas can be prompted to evacuate conveniently. And the prompting content comprises the location and the range of the dangerous area, so that the operators can conveniently evacuate away from the dangerous point.
Theoretically, the lower the safety degree of real-time gas data is, the larger the danger area is, and the more people to be evacuated are notified, and thus, a multistage safety management is actually performed here.
The specific calculation mode of the influence distance is that L = k/sigma, L is an early warning distance, k is a preset value, and sigma is a safety degree numerical value, namely the smaller the sigma numerical value is, the larger the L numerical value is, namely the robot position is taken as the center, the larger the influence radius L is, and the larger the evacuation prompting range is.
Specifically, when step S6 is executed, the control center calls the positioning information, the gas detection data, and the instant video information of the gas detection robot when determining that the safety degree of the real-time gas data is lower than the third threshold, generates a safety level and an influence distance according to the gas detection data and the instant video information, generates a dangerous area with the positioning information of the gas detection robot as the center, and starts an alarm on the gas detection robot to prompt people near the gas detection robot to evacuate; meanwhile, the information of the staff in the dangerous area is obtained, and the evacuation message is sent to the mobile terminal of the staff in the dangerous area.
S7: the operation personnel finish the operation, retrieve gaseous detection robot.
If the gas in the limited space is not deteriorated in the operation time of the operator, the safety degree of real-time gas data is continuously kept above the second threshold value, an alarm is not needed, the gas detection robot is ensured to continuously work until the operator finishes the operation, and the gas detection robot is recovered.
In a word, a displacement device for facilitating displacement, a gas detection instrument for facilitating gas data acquisition, a positioning device for facilitating self position acquisition, a video acquisition device for facilitating acquisition of video data around the gas detection instrument, a prompting device for facilitating prompting whether an operator enters a limited space, a signal sending device for facilitating data sending to a control center and an alarm device for facilitating alarm are arranged on the gas detection robot; the control center is used for remote calculation and timely informing the gas detection robot to perform corresponding operation or sending evacuation information to inform people of evacuation.
The method for detecting the gas in the limited space of the nuclear power site is simple and convenient, does not need manual management, saves labor cost, has high intelligent degree, high gas detection accuracy and good safety, and can alarm in a grading manner when the gas detection is abnormal, so that the alarm is timely and efficient, and the operation safety degree is higher.
Example two: as shown in fig. 2, which is only one embodiment of the present invention, the present invention further provides a system for detecting a gas in a confined space of a nuclear power plant, including:
a gas detection module;
a displacement module;
a gas data acquisition module;
a sending module;
a master control module;
a first judgment module;
a prompt module;
a second judgment module;
an alarm module;
a third judgment module;
a calculation module;
a notification module;
when an operator enters the restricted space for operation, the gas detection module is placed in the restricted space, the gas detection module is driven to displace in the restricted space through the displacement module, gas data at the gas detection module is obtained in real time through the gas data acquisition module, and the gas data is sent to the master control module outside the restricted space through the sending module; when the first judgment module on the master control module judges that the safety degree of the gas data is higher than a first threshold value, the prompting module prompts that the limited space operation is allowed to enter; when the second judgment module on the master control module judges that the safety degree of the gas data is lower than a second threshold value, an alarm module arranged on the gas detection module is started to prompt operators around the gas detection module to evacuate; when the third judgment module on the master control module judges that the safety degree of the gas data is lower than a third threshold value, the calculation module intelligently generates a dangerous area according to the positioning of the gas detection module and the gas data, acquires the information of the workers in the dangerous area, and sends an evacuation message to the mobile end of the workers in the dangerous area through the notification module until the workers complete the operation, so as to recover the gas detection robot.
In addition, the system further comprises:
a positioning module; the gas detection module is arranged on the base and used for acquiring position information of the gas detection module;
the video information acquisition module is arranged on the gas detection module and used for acquiring video information at the gas detection module;
the positioning module and the video information acquisition module are both connected with the calculation module through the sending module; the calculation module acquires the positioning module and the video information and generates the safety level and the influence distance data at the gas detection module.
The method and the system for detecting the gas in the limited space of the nuclear power site are simple and convenient, do not need manual management, save labor cost, have high intelligent degree, high gas detection accuracy and good safety, and can alarm in a grading manner when the gas detection is abnormal, so that the alarm is timely and efficient, and the operation safety degree is higher.
The present invention is not limited to the above-described specific embodiments, and various modifications and variations are possible. Any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. A nuclear power site limited space gas detection method is characterized by comprising the following steps:
s1: when an operator enters the restricted space for operation, placing a robot with a displacement function and provided with a gas detector to the restricted space;
s2: enabling the robot to displace in a limited space;
s3: acquiring gas data and a robot positioning position at the robot in real time, and sending the gas data and the robot positioning position to a control center outside a limited space, wherein the control center calculates the safety degree of the gas data;
s4: the control center judges whether the safety degree of the gas data is higher than a first threshold value; if yes, prompting permission of entering the limited space operation, and executing step S5; otherwise, the operation is not executed;
s5: the control center judges whether the safety degree of the gas data is lower than a second threshold value or not; if yes, an alarm arranged on the robot is started to prompt operators around the robot to evacuate, and step S6 is executed; otherwise, go to step S7;
s6: the control center judges whether the safety degree of the gas data is lower than a third threshold value or not; if so, intelligently generating a dangerous area according to the positioning position and the gas data of the robot, acquiring the information of the workers in the dangerous area, and sending an evacuation message to a mobile end of the workers in the dangerous area; otherwise, the operation is not executed;
s7: the operator finishes the operation and recovers the robot.
2. The method for detecting the gas in the limited space of the nuclear power plant according to claim 1, further comprising the following steps:
before step S1 is executed, the gas detector and the displacement function of the robot are debugged.
3. The method for detecting the gas in the limited space of the nuclear power site as claimed in claim 1, wherein the method comprises the following steps:
in step S2, the robot displacement mode includes performing displacement and remote displacement according to a preset route.
4. The method for detecting the gas in the limited space of the nuclear power site as claimed in claim 1, wherein the method comprises the following steps:
when step S3 is executed, the control center calculates a gas data safety degree, which is the product of the standard deviation of the ratio of the harmful gas detection value to the harmful gas health standard value of each item and the correction value of the robot positioning position.
5. The method for detecting the gas in the limited space of the nuclear power site as claimed in claim 1, wherein the method comprises the following steps:
when step S5 is executed, the second threshold value is not greater than the first threshold value.
6. The method for detecting the gas in the limited space of the nuclear power site as claimed in claim 1, wherein the method comprises the following steps:
in step S5, the alarm devices include an audible alarm device and an optical alarm device.
7. The method for detecting the gas in the limited space of the nuclear power site as claimed in claim 1, wherein the method comprises the following steps:
when step S6 is executed, the third threshold value is not greater than the second threshold value.
8. The method for detecting the gas in the limited space of the nuclear power site as claimed in claim 1, wherein the method comprises the following steps:
when the step S6 is executed, if the control center judges that the safety degree of the gas data is lower than a third threshold value, the positioning information, the gas detection data and the instant video information of the robot are called, the safety level and the influence distance data are generated according to the gas detection data and the instant video information, a dangerous area is generated by taking the positioning information of the robot as the center, and an alarm on the robot is started to prompt people nearby the robot to evacuate; meanwhile, the information of the staff in the dangerous area is obtained, and the evacuation message is sent to the mobile terminal of the staff in the dangerous area.
9. A nuclear power site confined space gas detection system is characterized by comprising:
a gas detection module;
a displacement module;
a gas data acquisition module;
a sending module;
a master control module;
a first judgment module;
a prompt module;
a second judgment module;
an alarm module;
a third judgment module;
a calculation module;
a notification module;
when an operator enters the restricted space for operation, the gas detection module is placed in the restricted space, the gas detection module is driven to displace in the restricted space through the displacement module, gas data at the gas detection module is obtained in real time through the gas data acquisition module, and the gas data is sent to the master control module outside the restricted space through the sending module; when the first judgment module on the master control module judges that the safety degree of the gas data is higher than a first threshold value, the prompting module prompts that the limited space operation is allowed to enter; when the second judgment module on the master control module judges that the safety degree of the gas data is lower than a second threshold value, an alarm module arranged on the gas detection module is started to prompt operators around the gas detection module to evacuate; when a third judgment module on the master control module judges that the safety degree of the gas data is lower than a third threshold value, a dangerous area is intelligently generated through the calculation module according to the positioning of the gas detection module and the gas data, the information of workers in the dangerous area is acquired, and an evacuation message is sent to a mobile end of the workers in the dangerous area through the notification module; and recovering the robot until the operator finishes the operation.
10. The system of claim 9, further comprising:
a positioning module; the gas detection module is arranged on the base and used for acquiring position information of the gas detection module;
the video information acquisition module is arranged on the gas detection module and used for acquiring video information at the gas detection module;
the positioning module and the video information acquisition module are both connected with the calculation module through the sending module; the calculation module acquires the positioning module and the video information and generates the safety level and the influence distance data at the gas detection module.
Priority Applications (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114999119A (en) * | 2022-05-24 | 2022-09-02 | 江苏省盐城技师学院 | Limited space gas alarm system and method based on transmission function of Internet of things |
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