CN113669631A - Gas equipment leakage detection device and method - Google Patents
Gas equipment leakage detection device and method Download PDFInfo
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- CN113669631A CN113669631A CN202110748220.2A CN202110748220A CN113669631A CN 113669631 A CN113669631 A CN 113669631A CN 202110748220 A CN202110748220 A CN 202110748220A CN 113669631 A CN113669631 A CN 113669631A
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- 238000001514 detection method Methods 0.000 title claims abstract description 46
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- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 description 135
- 230000006872 improvement Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
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- 230000032683 aging Effects 0.000 description 1
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- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/18—Arrangements for supervising or controlling working operations for measuring the quantity of conveyed product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
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Abstract
The invention provides a gas equipment leakage detection device and a method. The device comprises a controller and one or more temperature and pressure sensors which are connected with the controller and installed on a gas pipeline, wherein the controller is used for respectively calculating the mass M and the flow L of gas flowing through within a certain time based on the temperature and the pressure output by the temperature and pressure sensors, and judging whether gas leakage occurs or not according to whether the mass M and the flow L of the gas at the temperature and pressure sensors are both within a set threshold range or not or according to whether the difference delta M and the delta L of the mass M and the flow L of the gas at two adjacent temperature and pressure sensors are both within a set threshold range. The invention uses the temperature and pressure sensor to replace the flow sensor in the prior art, and the original one-dimensional detection is improved into two-dimensional detection, so that the detection precision is obviously improved. In addition, the invention can also carry out leakage detection based on the delta M and the delta L at the two adjacent temperature and pressure sensors, and the difference result eliminates the M fluctuation and the L fluctuation which are approximately the same at the two temperature and pressure sensors, thereby further improving the detection precision.
Description
Technical Field
The invention belongs to the technical field of gas leakage detection, and particularly relates to a gas equipment leakage detection device and method.
Background
With the rapid development of economy and science and technology, people pay more and more attention to the improvement of quality of life and the improvement of living environment. The use of clean energy such as liquefied petroleum gas, natural gas and the like brings convenience to people, improves the urban environment, reduces emission and environmental pollution, but also brings potential danger to people. The gas leakage is a main dangerous source, and when a valve, a connecting rubber pipe, a pipeline joint and using equipment are damaged or not sealed tightly, the gas leakage is likely to occur in the using process of gas equipment such as a gas stove, so that a light person can cause poisoning, and a heavy person causes fire or explosion, thus threatening the life and property safety of people. In order to reduce the harm caused by gas leakage, some gas equipment realizes flame detection and automatic flameout functions by arranging a temperature sensor and electromagnetic valve integrated device. The temperature detection is realized by a semiconductor temperature difference power generation piece, if the gas equipment can be normally ignited or normally works when being ignited, the flame enables two surfaces of the temperature difference power generation piece to have enough temperature difference, the temperature difference power generation piece outputs direct current voltage with certain amplitude to the electromagnetic valve to enable the electromagnetic valve to be opened, and the main gas channel is connected; if the gas equipment can not normally ignite when striking a fire or flameout in the midway due to fault, the thermoelectric generation piece has no output or the output is not enough to maintain the connection of the electromagnetic valve, and the electromagnetic valve is disconnected to cut off the gas. Although the improvement measures can ensure that the gas is cut off when no flame exists, the leakage caused by the reasons of untight sealing of the connecting rubber pipe, aging leakage, damage of the gas pipeline and the like does not work, the time for searching leakage points is increased, and the leakage problem cannot be solved in time.
The invention patent with application number 201910221240.7 discloses a gas leakage prevention system and a method, wherein the system mainly comprises a centralized control unit, a temperature sensor, a flow sensor, a gas detection alarm, a gas pipeline electromagnetic valve and the like, and whether gas leakage occurs or not is judged mainly according to the comparison of the flow measured by the flow sensor and a set threshold value. Because the gas flow is not very stable and the measurement accuracy of the flow sensor is limited, false alarm or false alarm occurs frequently, and especially when the leakage is not very serious, the detection accuracy is more difficult to guarantee.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a gas equipment leakage detection device and a gas equipment leakage detection method.
In order to achieve the above object, the present invention adopts the following technical solutions.
In a first aspect, the invention provides a gas equipment leakage detection device, which comprises a controller and one or more temperature and pressure sensors connected with the controller and installed on a gas pipeline, wherein the controller is used for respectively calculating mass M and flow L of gas flowing through a certain time based on the temperature and pressure output by the temperature and pressure sensors, and judging whether gas leakage occurs according to whether M and L at the temperature and pressure sensors are both within a set threshold range or not, or according to whether difference delta M and delta L between M and L at two adjacent temperature and pressure sensors are both within a set threshold range.
Further, the temperature and pressure sensor comprises a first temperature and pressure sensor and a second temperature and pressure sensor which are respectively installed at the air inlet end and the air outlet end of the rubber pipe connected with the gas equipment, and if the delta M and the delta L obtained based on the first temperature and pressure sensor and the second temperature and pressure sensor are both in the set threshold range, gas leakage occurs at the joint of the two ends of the rubber pipe or the rubber pipe.
Furthermore, the device also comprises an electromagnetic valve which is connected with the controller and is arranged on the gas household pipeline, and the electromagnetic valve is used for cutting off the gas of the main pipeline under the action of the controller when the gas leakage is detected.
Furthermore, the device also comprises a range hood and/or an exhaust fan which are connected with the controller and used for starting to work under the action of the controller when the gas leakage is detected.
Furthermore, the device also comprises an acousto-optic alarm module connected with the controller and used for carrying out acousto-optic alarm under the action of the controller when the gas leakage is detected.
Further, the apparatus further includes a temperature sensor connected to the controller and mounted on the gas appliance for detecting whether the flame is generated.
Furthermore, the device also comprises a gas concentration sensor connected with the controller and used for measuring the gas concentration of the surrounding environment of the gas equipment, and the controller judges whether gas leakage occurs according to the fact whether the gas concentration exceeds a set threshold value or not.
Furthermore, the device also comprises a wireless communication module connected with the controller and used for sending alarm information to a user mobile phone and/or a control center under the action of the controller when the gas leakage is detected.
In a second aspect, the invention provides a method for detecting gas leakage by using the device, which comprises the following steps:
reading a temperature value output by a temperature sensor, and if the temperature value exceeds a set threshold value, enabling the flame to be normal; if the temperature value is less than a set threshold value, no flame is generated or the flame is extinguished;
under the condition that the flame is normal, calculating the mass M and the flow L of the gas flowing through within a certain time according to the temperature and the pressure output by the temperature and pressure sensor, and if the mass M and the flow L are within a set threshold range, gas leakage occurs;
respectively calculating delta M and delta L corresponding to the first temperature and pressure sensor and the second temperature and pressure sensor under the condition that the flame is normal, and if the delta M and the delta L are both in a set threshold range, gas leakage occurs at the connecting part of the two ends of the rubber pipe or the rubber pipe per se;
and reading the gas concentration output by the gas concentration sensor, and if the gas concentration exceeds a set threshold value, gas leakage occurs.
Further, the method further comprises: once the gas leakage is detected, the controller outputs a control signal, the electromagnetic valve is cut off, the range hood and/or the exhaust fan are/is started, the acousto-optic alarm module is triggered to carry out acousto-optic alarm, and alarm information is sent to a mobile phone of a user and/or a control center.
Compared with the prior art, the invention has the following beneficial effects.
The controller and one or more temperature and pressure sensors connected with the controller and installed on a gas pipeline are arranged, the controller respectively calculates the mass M and the flow L of gas flowing through the controller within a certain time based on the temperature and the pressure output by the temperature and pressure sensors, and whether gas leakage occurs or not is judged according to whether the mass M and the flow L at the temperature and pressure sensors are both within a set threshold range or not or according to whether the difference delta M and the delta L between the mass M and the flow L at two adjacent temperature and pressure sensors are both within a set threshold range, so that the automatic detection of the gas leakage of the gas equipment is realized. The invention uses the temperature-pressure sensor to replace the flow sensor in the prior art, respectively calculates the mass M and the flow L of the fuel gas flowing through within a certain time by calculating the temperature and the pressure output by the temperature-pressure sensor, and detects whether the fuel gas leakage occurs according to the M and the L, and the original one-dimensional (L) detection is improved into two-dimensional (M and L), thereby obviously improving the detection precision and reducing the false alarm rate. In addition, the leakage detection can be carried out based on the delta M and the delta L at the two adjacent temperature and pressure sensors, the M fluctuation and the L fluctuation which are approximately the same at the two temperature and pressure sensors are eliminated by the difference calculation result, and the detection precision can be further improved; but also approximately the location of the leak.
Drawings
Fig. 1 is a block diagram of a gas equipment leakage detection device according to an embodiment of the present invention, in which: 1-a controller, 2-a temperature and pressure sensor, 3-an electromagnetic valve, 4-a temperature sensor, 5-a sound and light alarm module, 6-a wireless communication module, 7-a gas concentration sensor and 8-a range hood/exhaust fan.
Fig. 2 is a schematic view of an installation position of the device according to the embodiment of the present invention, in which: 3-an electromagnetic valve, 4-a temperature sensor, 11-a gas-to-the-home pipeline, 12-a manual valve, 13-a gas meter, 14-a rubber pipe, 15-a gas device, 21-a first temperature and pressure sensor and 22-a second temperature and pressure sensor.
Fig. 3 is a flow chart of a method for detecting gas leakage by using the device according to the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and more obvious, the present invention is further described below with reference to the accompanying drawings and the detailed description. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a block diagram of a gas equipment leakage detection device according to an embodiment of the present invention, including a controller 1 and one or more temperature and pressure sensors 2 connected to the controller 1 and installed on a gas pipeline, where the controller 1 is configured to calculate a mass M and a flow L of gas flowing through the gas pipeline within a certain time based on a temperature and a pressure output by the temperature and pressure sensors 2, and determine whether gas leakage occurs according to whether M and L at the temperature and pressure sensors 2 are both within a set threshold range, or according to whether a difference Δ M and Δ L between M and L at two adjacent temperature and pressure sensors 2 are both within a set threshold range.
In this embodiment, the device mainly comprises a controller 1 and a temperature and pressure sensor 2. The temperature and pressure sensor 2 is a temperature and pressure integrated sensor, is arranged on a gas pipeline, and can directly output voltage values reflecting the temperature and pressure of the gas. The controller 1 is used for reading temperature and pressure data output by the temperature and pressure sensor 2. Since the present embodiment does not directly determine whether gas leakage occurs according to the temperature and pressure values of the gas, but determines the mass M and the flow L of the gas flowing through within a certain time (a data acquisition period, or a unit time such as 1 second, or a set fixed time), the controller 1 further calculates M and L according to the temperature and pressure values.
The calculation method of M and L is described below. The part that the warm-pressing sensor 2 is used for temperature measurement is its inside two high sensitivity, high accuracy temperature probes, and two temperature probes can produce the difference in temperature when gas flows in the pipeline, according to the size of difference in temperature can calculate gaseous velocity of flow. With the flow velocity, the flow can be calculated by combining the inner diameter area of the pipeline: flow rate is the flow velocity x the inner diameter area of the pipe. The density of the gas under different temperatures and pressures is different, the pressure value output by the pressure sensor in the temperature and pressure sensor 2 and the temperature value output by the temperature probe can be converted into the gas density, and the mass of the gas flowing through in a certain time can be calculated by the gas density: mass is volume x density and volume is flow x time.
Under the normal working condition of the gas equipment 15, M and L both have a variation range, when leakage occurs and a leakage point is on a pipeline (or equipment) in front of the temperature and pressure sensor 2, M and L also have a variation range, and only the maximum and minimum values of the variation range when leakage occurs are respectively smaller than the maximum and minimum values of the variation range under the normal condition. Therefore, it is possible to set a threshold range according to the variation range of M and L when leakage occurs, respectively, and the controller 1 determines whether leakage occurs according to whether both M and L are within the set threshold range. Because the embodiment carries out two-dimensional detection based on M and L, compared with the prior art which only carries out one-dimensional detection based on L, the detection precision can be obviously improved.
In the present embodiment, the number of the temperature and pressure sensors 2 is not limited, and may be one or more. When a plurality of temperature-pressure sensors 2 are provided, differences Δ M and Δ L of two adjacent temperature-pressure sensors M and L are calculated, respectively. When the gas equipment 15 works normally, if no leakage occurs or the leakage point is not between the two temperature and pressure sensors 2, M and L of the two temperature and pressure sensors 2 are approximately equal or delta M and delta L are both close to 0; if leakage occurs between the two temperature and pressure sensors 2, Δ M and Δ L should have a large value, a threshold range may be set experimentally or empirically, and if Δ M and Δ L are within the set threshold range, it is determined that gas leakage has occurred. Since the differences Δ M and Δ L between M and L at the two adjacent temperature and pressure sensors 2 cancel the influence of fluctuation of M and L, that is, Δ M and Δ L are approximately constant when M and L fluctuate, performing leak detection based on Δ M and Δ L can further improve detection accuracy. In addition, by increasing the number of the temperature and pressure sensors 2, that is, reducing the adjacent intervals, and performing the same judgment on every two adjacent temperature and pressure sensors 2, the position of the leakage point can be determined more accurately.
As an alternative embodiment, the temperature and pressure sensor 2 includes a first temperature and pressure sensor 21 and a second temperature and pressure sensor 22 respectively installed at an air inlet end and an air outlet end of the rubber hose 14 connected to the gas appliance 15, and if Δ M and Δ L obtained based on the first temperature and pressure sensor 21 and the second temperature and pressure sensor 22 are both within a set threshold range, gas leakage occurs at the connection between the two ends of the rubber hose 14 or the rubber hose 14 itself.
In this embodiment, two temperature and pressure sensors are respectively installed at two ends of the rubber pipe 14, specifically, a first temperature and pressure sensor 21 is installed on a pipeline connected with an air inlet end of the rubber pipe 14, and a second temperature and pressure sensor 22 is installed on the gas appliance 15 connected with an air outlet end of the rubber pipe 14, as shown in fig. 2. The present embodiment is designed mainly for the phenomenon that the rubber tube 14 is easy to age and the joint between the two ends of the rubber tube is easy to loosen to cause leakage, and whether the rubber tube 14 itself or the two ends of the rubber tube 14 leaks can be determined according to whether the Δ M and the Δ L of the two temperature and pressure sensors are both within the set threshold range.
As an alternative embodiment, the device further comprises an electromagnetic valve 3 connected with the controller 1 and installed on the gas service pipeline 11, and used for cutting off the gas of the main pipeline under the action of the controller 1 when the gas leakage is detected.
In the present embodiment, an electromagnetic valve 3 is disposed in the gas service pipe 11, as shown in fig. 2. The control end of the electromagnetic valve 3 is connected with the controller 1. The electromagnetic valve 3 is normally in a connection state, and the gas equipment 15 supplies gas normally. When detecting that gas leaks, in order to ensure safety, the controller 1 outputs a control signal to the control end of the electromagnetic valve 3, so that the electromagnetic valve 3 is disconnected, and the gas of the main pipeline is cut off.
As an alternative embodiment, the device further comprises a range hood and/or a ventilator 8 connected to the controller 1, and configured to start operating under the action of the controller 1 when the occurrence of gas leakage is detected.
In this embodiment, in order to prevent poisoning of people, the controller 1 is connected to a range hood of the gas device 15 and/or an indoor exhaust device, and when detecting that gas leakage occurs, the controller 1 outputs a control signal to turn on the range hood and/or the exhaust fan 8, so as to clean an air environment around the gas device 15. Generally, an electronic switch such as a relay is arranged in a power supply loop of the range hood and/or the exhaust fan 8, the controller 1 is connected with a control end of the electronic switch, and the start and stop of the range hood and/or the exhaust fan 8 are controlled by controlling the on-off of the electronic switch.
As an optional embodiment, the device further comprises an audible and visual alarm module 5 connected with the controller 1 and used for giving an audible and visual alarm under the action of the controller 1 when the gas leakage is detected.
In the embodiment, in order to remind relevant personnel to process when the gas leakage is detected, an audible and visual alarm module 5 connected with the controller 1 is arranged. When the gas leakage is detected, the controller 1 outputs a control signal to the sound-light alarm module 5, and the sound-light alarm module 5 is triggered to perform sound-light alarm.
As an alternative embodiment, the apparatus further comprises a temperature sensor 4 connected to the controller 1 and mounted on the gas appliance 15 for detecting whether a flame is generated.
This embodiment shows a technical solution for detecting whether a flame is generated. A temperature sensor 4 connected with the controller 1 is arranged, the temperature sensor 4 is arranged at a position on the gas equipment 15 close to the flame, and detection is carried out according to the principle that the temperature value output by the temperature sensor 4 obviously increases when the flame is generated. The flame detection is mainly performed to determine whether the gas appliance 15 is in a normal operating state, so that different gas leakage detection schemes are made for different states.
As an alternative embodiment, the apparatus further includes a gas concentration sensor 7 connected to the controller 1 for measuring the gas concentration of the environment around the gas device 15, and the controller 1 determines whether gas leakage occurs according to whether the gas concentration exceeds a set threshold.
In order to improve the reliability of gas leakage detection, the present embodiment is provided with a gas concentration sensor 7 connected to the controller 1. The gas concentration sensor 7 detects the gas concentration in the environment around the gas appliance 15, and determines that gas leakage has occurred if the gas concentration exceeds a set threshold value. The method for detecting gas leakage based on the gas concentration sensor 7 is generally effective after a period of time of leakage, and the alarm time generally lags behind other detection modes. However, this method is also an effective supplement when other detection means fail.
As an optional embodiment, the device further comprises a wireless communication module 6 connected to the controller 1, and configured to send an alarm message to a user's mobile phone and/or a control center under the action of the controller 1 when the occurrence of gas leakage is detected.
The embodiment provides a technical scheme that the device carries out remote alarm to a user or a control center. The specific scheme is that a wireless communication module 6 such as a 5G/4G chip connected with the controller 1 is arranged, and when gas leakage is detected, prompt information is automatically sent to a user mobile phone and/or a control center under the action of the controller 1.
Fig. 3 is a flowchart of a method for detecting gas leakage by using the device according to an embodiment of the present invention, where the method includes the following steps:
102, under the condition that the flame is normal, calculating the mass M and the flow L of the gas flowing through within a certain time according to the temperature and the pressure output by the temperature and pressure sensor 2, and if the mass M and the flow L are within a set threshold range, gas leakage occurs;
103, respectively calculating delta M and delta L corresponding to the first temperature and pressure sensor 21 and the second temperature and pressure sensor 22 under the condition that the flame is normal, wherein if the delta M and the delta L are both within a set threshold range, gas leakage occurs at the connecting part of the two ends of the rubber pipe 14 or the rubber pipe 14 per se;
and 104, reading the gas concentration output by the gas concentration sensor 7, and if the gas concentration exceeds a set threshold value, gas leakage occurs.
In this embodiment, step 101 is mainly used to determine whether the flame of the gas appliance 15 is normal. In the embodiment, whether the flame is normal is judged by comparing the temperature value output by the temperature sensor 4 with a set threshold value, and if the temperature value exceeds the set threshold value, the flame is normal; if the temperature value is less than the set threshold value, no flame is generated or flame extinguishment is indicated. The two thresholds are generally not equal, with the front threshold being significantly larger than the rear threshold.
In this embodiment, step 102 is mainly used to determine whether gas leakage occurs based on M and L at one temperature and pressure sensor. If the judgment result of the step 101 is that the flame is normal, calculating the mass M and the flow L of the flowing gas according to the temperature and the pressure output by the temperature and pressure sensor 2, and if the mass M and the flow L are both in the set threshold range, determining that gas leakage occurs and the leakage point is in front of the temperature and pressure sensor 2. If the number of the temperature and pressure sensors 2 is more than 1, the judgment can be made based on M and L at each temperature and pressure sensor 2, and the approximate position of the leakage point can be determined according to the judgment result at each temperature and pressure sensor 2.
In this embodiment, step 103 is mainly used to detect a leak based on Δ M and Δ L corresponding to the first temperature and pressure sensor 21 and the second temperature and pressure sensor 22. If the flame is normal as a result of the determination in step 101, calculating Δ M and Δ L corresponding to the first temperature and pressure sensor 21 and the second temperature and pressure sensor 22, respectively, and if both Δ M and Δ L are within a set threshold range, indicating that a leak has occurred, and the leak is between the first temperature and pressure sensor 21 and the second temperature and pressure sensor 22, that is, at the connection between the two ends of the rubber tube 14 or the rubber tube 14 itself.
In this embodiment, step 104 is mainly used for leak detection based on the gas concentration sensor 7. The gas concentration sensor 7 is used to measure the gas concentration in the environment around the gas appliance 15, and if the measured gas concentration exceeds a set threshold value, it is determined that gas leakage has occurred.
It should be noted that the leak detection method provided in this embodiment only provides some detection methods for common leak scenes, and detection methods for other different scenes can be obtained by performing some simple reasoning on the basis, which is not listed here.
As an alternative embodiment, the method further comprises: once the gas leakage is detected, the controller 1 outputs a control signal, switches off the electromagnetic valve 3, starts the range hood and/or the exhaust fan, triggers the audible and visual alarm module 5 to perform audible and visual alarm, and sends alarm information to the mobile phone of the user and/or the control center.
This embodiment provides a technical solution for processing after detecting a leak. No matter which method detects the gas leakage, in order to prevent the accident from expanding, ensure the safety of human bodies and equipment and eliminate faults, the controller 1 immediately outputs a control signal, cuts off the electromagnetic valve 3, starts the range hood and/or the exhaust fan, triggers the sound-light alarm module 5 to carry out sound-light alarm, and sends alarm information to the mobile phone of a user and/or a control center.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The gas equipment leakage detection device is characterized by comprising a controller and one or more temperature and pressure sensors which are connected with the controller and installed on a gas pipeline, wherein the controller is used for respectively calculating the mass M and the flow L of gas flowing through within a certain time based on the temperature and the pressure output by the temperature and pressure sensors, and judging whether gas leakage occurs or not according to whether the mass M and the flow L at the temperature and pressure sensors are both within a set threshold range or not or whether the difference delta M and the delta L of the mass M and the flow L at the temperature and pressure sensors are both within a set threshold range or not.
2. The gas appliance leakage detection device according to claim 1, wherein the warm-pressure sensors include a first warm-pressure sensor and a second warm-pressure sensor respectively installed at an inlet end and an outlet end of a rubber hose connecting the gas appliance, and if Δ M and Δ L obtained based on the first warm-pressure sensor and the second warm-pressure sensor are both within a set threshold range, gas leakage occurs at a joint between both ends of the rubber hose or the rubber hose itself.
3. The gas appliance leakage detecting device according to claim 2, further comprising a solenoid valve connected to the controller and installed in the gas service conduit for shutting off gas from the main conduit under the action of the controller when gas leakage is detected.
4. The gas appliance leakage detection device of claim 3, further comprising a range hood and/or a ventilator coupled to the controller for initiating operation under the control of the controller when a gas leakage is detected.
5. The gas appliance leakage detection device according to claim 4, further comprising an audible and visual alarm module connected to the controller for providing an audible and visual alarm under the action of the controller when a gas leakage is detected.
6. The gas-fired appliance leak detection apparatus as recited in claim 5, further comprising a temperature sensor connected to the controller and mounted on the gas-fired appliance for detecting whether a flame is generated.
7. The gas appliance leakage detection device of claim 6, further comprising a gas concentration sensor connected to the controller for measuring a gas concentration in an environment surrounding the gas appliance, wherein the controller determines whether gas leakage has occurred based on whether the gas concentration exceeds a predetermined threshold.
8. The gas appliance leakage detection device according to claim 7, further comprising a wireless communication module connected to the controller, for sending an alarm message to a user's mobile phone and/or a control center under the action of the controller when the gas leakage is detected.
9. A method for detecting gas leakage by using the device of claim 8, comprising the steps of:
reading a temperature value output by a temperature sensor, and if the temperature value exceeds a set threshold value, enabling the flame to be normal; if the temperature value is less than a set threshold value, no flame is generated or the flame is extinguished;
under the condition that the flame is normal, calculating the mass M and the flow L of the gas flowing through within a certain time according to the temperature and the pressure output by the temperature and pressure sensor, and if the mass M and the flow L are within a set threshold range, gas leakage occurs;
respectively calculating delta M and delta L corresponding to the first temperature and pressure sensor and the second temperature and pressure sensor under the condition that the flame is normal, and if the delta M and the delta L are both in a set threshold range, gas leakage occurs at the connecting part of the two ends of the rubber pipe or the rubber pipe per se;
and reading the gas concentration output by the gas concentration sensor, and if the gas concentration exceeds a set threshold value, gas leakage occurs.
10. The method of claim 9, further comprising: once the gas leakage is detected, the controller outputs a control signal, the electromagnetic valve is cut off, the range hood and/or the exhaust fan are/is started, the acousto-optic alarm module is triggered to carry out acousto-optic alarm, and alarm information is sent to a mobile phone of a user and/or a control center.
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| CN202110748220.2A CN113669631A (en) | 2021-07-01 | 2021-07-01 | Gas equipment leakage detection device and method |
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| CN202110748220.2A CN113669631A (en) | 2021-07-01 | 2021-07-01 | Gas equipment leakage detection device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234060A (en) * | 2021-12-14 | 2022-03-25 | 深圳市恒兴盛厨具有限公司 | Gas leakage alarm method and system for gas oven |
| CN114373284A (en) * | 2021-12-20 | 2022-04-19 | 广州燃气集团有限公司 | Method for improving gas leakage alarm accuracy |
| CN116129614A (en) * | 2023-02-14 | 2023-05-16 | 新奥新智科技有限公司 | A gas leakage detection method, device, equipment and storage medium |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002243572A (en) * | 2001-02-21 | 2002-08-28 | Osaka Gas Co Ltd | Method and device for inspecting piping leakage |
| DE102004045803A1 (en) * | 2004-09-22 | 2006-04-06 | Inficon Gmbh | Leak test method and leak tester |
| CN203585824U (en) * | 2013-10-29 | 2014-05-07 | 中国石油化工股份有限公司 | Pipeline leakage test device |
| CN104700504A (en) * | 2015-03-31 | 2015-06-10 | 成都秦川科技发展有限公司 | Safety cut-off type IC (integrated circuit) card intelligent mass flow rate gas meter and management system thereof |
| CN204924340U (en) * | 2015-05-13 | 2015-12-30 | 山东省科学院海洋仪器仪表研究所 | Wireless gas of intelligence table |
| CN207162143U (en) * | 2017-04-28 | 2018-03-30 | 重庆交通大学 | Pipeline Leak point detects alignment system |
| CN109340585A (en) * | 2018-10-26 | 2019-02-15 | 北京化工大学 | A kind of pipeline leak detection and location method |
| CN109751516A (en) * | 2017-11-08 | 2019-05-14 | 中国石油化工股份有限公司 | A kind of natural gas line leakage system simulated leakage test device |
| CN109945242A (en) * | 2019-03-22 | 2019-06-28 | 郦剑飞 | Preventing gas leakage system and method and the method for judging gas leakage position |
| CN209070642U (en) * | 2018-09-26 | 2019-07-05 | 杭州云越科技有限公司 | Electronic temperature-pressure compensation film industrial combustion gas table |
| CN110319351A (en) * | 2019-07-18 | 2019-10-11 | 中海石油气电集团有限责任公司 | Pipeline gas micro-leakage continuous monitoring method and device based on detection pipe |
| CN111947039A (en) * | 2020-08-14 | 2020-11-17 | 深圳市前海三安盛科技有限公司 | Method and system for detecting pipeline leakage by utilizing gas flow |
| CN112899663A (en) * | 2021-01-15 | 2021-06-04 | 长鑫存储技术有限公司 | Detection method and detection device of gas transmission equipment and gas transmission equipment |
-
2021
- 2021-07-01 CN CN202110748220.2A patent/CN113669631A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002243572A (en) * | 2001-02-21 | 2002-08-28 | Osaka Gas Co Ltd | Method and device for inspecting piping leakage |
| DE102004045803A1 (en) * | 2004-09-22 | 2006-04-06 | Inficon Gmbh | Leak test method and leak tester |
| CN203585824U (en) * | 2013-10-29 | 2014-05-07 | 中国石油化工股份有限公司 | Pipeline leakage test device |
| CN104700504A (en) * | 2015-03-31 | 2015-06-10 | 成都秦川科技发展有限公司 | Safety cut-off type IC (integrated circuit) card intelligent mass flow rate gas meter and management system thereof |
| CN204924340U (en) * | 2015-05-13 | 2015-12-30 | 山东省科学院海洋仪器仪表研究所 | Wireless gas of intelligence table |
| CN207162143U (en) * | 2017-04-28 | 2018-03-30 | 重庆交通大学 | Pipeline Leak point detects alignment system |
| CN109751516A (en) * | 2017-11-08 | 2019-05-14 | 中国石油化工股份有限公司 | A kind of natural gas line leakage system simulated leakage test device |
| CN209070642U (en) * | 2018-09-26 | 2019-07-05 | 杭州云越科技有限公司 | Electronic temperature-pressure compensation film industrial combustion gas table |
| CN109340585A (en) * | 2018-10-26 | 2019-02-15 | 北京化工大学 | A kind of pipeline leak detection and location method |
| CN109945242A (en) * | 2019-03-22 | 2019-06-28 | 郦剑飞 | Preventing gas leakage system and method and the method for judging gas leakage position |
| CN110319351A (en) * | 2019-07-18 | 2019-10-11 | 中海石油气电集团有限责任公司 | Pipeline gas micro-leakage continuous monitoring method and device based on detection pipe |
| CN111947039A (en) * | 2020-08-14 | 2020-11-17 | 深圳市前海三安盛科技有限公司 | Method and system for detecting pipeline leakage by utilizing gas flow |
| CN112899663A (en) * | 2021-01-15 | 2021-06-04 | 长鑫存储技术有限公司 | Detection method and detection device of gas transmission equipment and gas transmission equipment |
Non-Patent Citations (1)
| Title |
|---|
| 宋文绪: "《化工原理优化设计与解题指南》", 吉林科学技术出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234060A (en) * | 2021-12-14 | 2022-03-25 | 深圳市恒兴盛厨具有限公司 | Gas leakage alarm method and system for gas oven |
| CN114234060B (en) * | 2021-12-14 | 2023-09-29 | 深圳市恒兴盛厨具有限公司 | Gas leakage alarm method and system for gas oven |
| CN114373284A (en) * | 2021-12-20 | 2022-04-19 | 广州燃气集团有限公司 | Method for improving gas leakage alarm accuracy |
| CN114373284B (en) * | 2021-12-20 | 2023-05-16 | 广州燃气集团有限公司 | Method for improving gas leakage alarm accuracy |
| CN116129614A (en) * | 2023-02-14 | 2023-05-16 | 新奥新智科技有限公司 | A gas leakage detection method, device, equipment and storage medium |
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