CN115507301A

CN115507301A - Safety device, safety control method and safety control system for liquefied petroleum gas tank

Info

Publication number: CN115507301A
Application number: CN202211408781.9A
Authority: CN
Inventors: 张继峰; 汪峰
Original assignee: Sichuan Renrensichuang Enterprise Management Co ltd
Current assignee: Sichuan Renrensichuang Enterprise Management Co ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2022-12-23

Abstract

The invention provides a safety device, a safety control method and a safety control system for a liquefied petroleum gas tank, and relates to the field of gas safety; the safety device comprises a shell for placing a petroleum liquefied gas tank, an air outlet unit, a controller, a gas sensor and a differential pressure sensor which are in communication connection with the controller; the air outlet unit comprises an air outlet pipe, an angle valve switch encoder, pressure regulating valves and an electronic quick stop valve, wherein the angle valve switch encoder is connected to the controller in a communication mode; the gas sensor is used for detecting the real-time concentration of combustible gas in the shell and generating a first signal; the differential pressure sensor is connected in parallel with the electronic quick stop valve and used for detecting the instantaneous flow and the cumulant flow of the gas in the gas pipe and generating a second signal, and the controller carries out micro-leakage detection on the gas system of the liquefied petroleum gas tank according to the first signal and the second signal. The invention can fundamentally realize all safety monitoring of the liquefied petroleum gas tank in the using process through the safety device.

Description

Safety device, safety control method and system for liquefied petroleum gas tank

Technical Field

The invention relates to the technical field of gas safety, in particular to a safety device, a safety control method and a safety control system for a liquefied petroleum gas tank.

Background

The liquefied petroleum gas tank has large energy density, convenient movement and wide application, and is widely applied to families and catering industries. Liquefied petroleum gas belongs to class A fire hazard dangerous substances, is stored in a pressure container at normal temperature and high pressure, has great fire hazard, and is easy to cause fire once leakage, thereby causing casualties and huge property loss. In recent years, explosion and fire accidents caused by leakage of liquefied petroleum gas are in a large number, so that the gas leakage condition needs to be continuously monitored in the using process of the liquefied petroleum gas. At present, liquefied gas leakage detection of various large-scale enterprise canteens and restaurants is mainly realized by a gas detection alarm instrument, such as a methane alarm, when the concentration of methane in the environment reaches an alarm threshold, a sound alarm is given out, and then a gas passage is closed in a manual or electric control mode; in addition, the gas with pungent smell is added into the canned liquefied petroleum gas, so that people in the environment can sense the gas leakage through the smell.

The method is widely applied to leakage detection in the using process of the liquefied gas tank, but the method also has some disadvantages in application, for example, when a gas alarm is adopted for gas leakage detection, although the sensitivity is high and the false alarm rate is low, the gas leakage diffusion needs time in the whole detection area, so the detection speed is slow, the area is small, and the concentration of the gas at the leakage center can be obviously changed; when the infrared imager is used for detecting leakage, although the infrared imager has high sensitivity and can realize remote testing, the detection process is easily influenced by the ambient temperature and the humidity, and the detection error is easy to appear. Namely, the leakage detection of the existing petroleum liquefied gas tank in the using process still has a leak, and has potential safety hazard.

Factors influencing the use safety of the liquefied petroleum gas tank include temperature, pressure, weight, the pouring state of the liquefied petroleum gas tank and the like besides gas leakage, so that the detection on the use safety of the liquefied petroleum gas tank is more comprehensive, and all potential safety hazards in the use process of the liquefied petroleum gas are fundamentally solved.

Disclosure of Invention

The invention aims to provide a safety device, a safety control method and a safety control system for a liquefied petroleum gas tank, which can realize the detection of temperature, pressure, weight, liquefied petroleum gas tank dumping, gas leakage alarm, gas pressure reduction and the like of the liquefied petroleum gas tank in all directions by designing the structure of the safety device, can also detect static micro leakage detection from the gas outlet end of the liquefied petroleum gas tank to gas equipment, and fundamentally solve all safety monitoring problems in the use process of the liquefied petroleum gas.

In order to achieve the above purpose, the invention provides the following technical scheme: a safety device for a liquefied petroleum gas tank comprises a shell, a gas outlet unit, a gas sensor, a differential pressure sensor and a controller, wherein the gas sensor and the differential pressure sensor are respectively in communication connection with the controller;

the shell is used for placing a petroleum liquefied gas tank and is provided with a half open chamber;

the gas outlet unit comprises a gas outlet pipe connected with a gas outlet of the liquefied petroleum gas tank, an angle valve switch encoder in communication connection with the controller, a pressure regulating valve and an electronic quick stop valve, wherein the pressure regulating valve and the electronic quick stop valve are arranged on the gas outlet pipe at intervals; the end part of the gas outlet pipe, which is far away from the liquefied petroleum gas tank, extends to the outer side of the shell, and the end part of the gas outlet pipe, which is positioned on the outer side of the shell, is connected to a gas using device; the angle valve switch encoder is connected with an angle valve at the top end of the liquefied petroleum gas tank, and a knob of the angle valve and a handle of the electronic quick stop valve both protrude out of the shell;

the gas sensor is arranged below the inner side of the shell and used for detecting the real-time concentration of combustible gas in the shell, generating a first signal and sending the first signal to the controller; the differential pressure sensor is connected in parallel with the electronic quick stop valve and is used for detecting and calculating the instantaneous flow and the cumulant flow of the gas in the gas pipe, generating a second signal and sending the second signal to the controller;

when the angle valve and the electronic quick stop valve are opened and the gas using equipment is closed, the controller performs periodic micro-leakage detection on a gas using system consisting of a petroleum liquefied gas tank and a gas outlet unit according to the first signal and the second signal.

Furthermore, the device also comprises a weighing sensor and a temperature sensor; the weighing sensor is arranged at the bottom of the shell and used for detecting the real-time weight of the petroleum liquefied gas tank in the shell, generating a third signal and sending the third signal to the controller; the temperature sensor is arranged on the inner wall of the shell and used for detecting the temperature of the side wall of the shell, generating a fourth signal and sending the fourth signal to the controller; the controller is used for calculating the weight of liquefied gas in the liquefied petroleum gas tank in real time according to a third signal so as to detect the micro leakage of the gas using system by combining the real-time detection data of the differential pressure sensor; the controller is used for monitoring the temperature abnormity of the side wall of the shell in real time according to the fourth signal so as to alarm in an emergency.

Furthermore, the shell of the semi-open chamber is of a barrel-shaped structure and comprises a barrel body with an opening at the top and an upper cover which is detachably connected with the barrel body; the outer wall of the barrel body is provided with a plurality of hollowed holes, and the knob of the angle valve and the handle of the electronic quick stop valve protrude out of the shell from the hollowed holes.

Furthermore, the shell of the semi-open chamber is of a barrel-shaped structure and comprises a barrel body with an opening at the top and an upper cover which is detachably connected with the barrel body; a bayonet is arranged at the position of the upper cover corresponding to the angle valve at the top end of the liquefied petroleum gas tank, and the bayonet is clamped on a knob of the angle valve so as to operate the knob of the angle valve from the outer side of the shell to open or close the angle valve; the upper cover is provided with an opening corresponding to the electronic quick stop valve, and a handle of the electronic quick stop valve protrudes out of the shell from the opening so as to be operated from the outer side of the shell to manually close the electronic quick stop valve.

Further, the controller comprises an NB communication unit, and the NB communication unit is used for the controller to remotely communicate with the cloud platform system so as to report the periodic micro-leakage detection result of the gas system.

The invention discloses a safety control method for a liquefied petroleum gas tank, which comprises the following steps:

building a cloud platform system so that controllers of all liquefied petroleum gas tank safety devices are in communication connection with the cloud platform system;

receiving a first operation command for any one liquefied petroleum gas tank safety device, wherein the first operation command is to start a micro-leakage detection program for the liquefied petroleum gas tank according to a preset condition; wherein the preset conditions comprise a gas leakage judgment standard and detection time; the first operation command is sent by a manually operated liquefied petroleum gas tank safety device or sent by a cloud platform system remote communication liquefied petroleum gas tank safety device;

performing micro-leakage detection according to the first operation command, judging a detection result of any one-time micro-leakage detection, and reporting the detection result to a cloud platform system; when the liquefied petroleum gas tank is judged to have gas leakage, respectively prompting leakage alarms in the liquefied petroleum gas tank safety device and the cloud platform system;

receiving a second operation command for the liquefied petroleum gas tank safety device with gas leakage, wherein the second operation command is used for overhauling the liquefied petroleum gas tank;

and after the maintenance is finished, reporting the gas leakage reason to the cloud platform system.

Further, the method further comprises:

and receiving a third operation command for any one liquefied petroleum gas tank safety device, wherein the third operation command is to automatically start a micro-leakage detection program for the liquefied petroleum gas tank according to a preset period, and report and record a detection result.

Further, the method further comprises:

receiving a remote viewing request sent by a mobile terminal through a cloud platform system, wherein the remote viewing request comprises the number of a to-be-viewed liquefied petroleum gas tank safety device and a to-be-viewed time range;

feeding back the detection times of the corresponding numbered liquefied petroleum gas tank safety device in the micro-leakage detection time range requested to be checked and the corresponding detection result;

and sending the leakage alarm to the corresponding mobile terminal through the cloud platform system so that the mobile terminal user can process the leakage alarm.

The invention also discloses a safety control system for the liquefied petroleum gas tank, which comprises: the system comprises a cloud platform system and a plurality of liquefied petroleum gas tank safety devices, wherein any liquefied petroleum gas tank safety device is in communication connection with the cloud platform system;

the device comprises a first receiving module, a second receiving module and a third receiving module, wherein the first receiving module is used for receiving a first operation command for any one liquefied petroleum gas tank safety device, and the first operation command is to start a micro-leakage detection program for the liquefied petroleum gas tank according to a preset condition; wherein the preset conditions comprise a gas leakage judgment standard and detection time; the first operation command is sent by a manually operated liquefied petroleum gas tank safety device or sent by a cloud platform system remote communication liquefied petroleum gas tank safety device;

the judging module is used for carrying out micro-leakage detection according to the first operation command, judging the detection result of any one-time micro-leakage detection and reporting the detection result to the cloud platform system; when the liquefied petroleum gas tank is judged to have gas leakage, respectively prompting leakage alarms in the liquefied petroleum gas tank safety device and the cloud platform system;

the second receiving module is used for receiving a second operation command of the liquefied petroleum gas tank safety device with gas leakage, and the second operation command is used for overhauling the liquefied petroleum gas tank;

and the reporting module is used for reporting the gas leakage reason to the cloud platform system after the maintenance is finished.

Further, the liquefied petroleum gas tank safety device comprises a shell, an air outlet unit, a controller, a gas sensor and a differential pressure sensor which are respectively in communication connection with the controller, and the controller is in communication connection with the cloud platform system;

the shell is provided with a half open chamber and is used for placing a petroleum liquefied gas tank; the gas outlet unit comprises a gas outlet pipe connected with a gas outlet of the liquefied petroleum gas tank, an angle valve switch encoder in communication connection with the controller, a pressure regulating valve and an electronic quick stop valve, wherein the pressure regulating valve and the electronic quick stop valve are arranged on the gas outlet pipe at intervals; the end part of the gas outlet pipe, which is far away from the liquefied petroleum gas tank, extends to the outer side of the shell, and the end part of the gas outlet pipe, which is positioned on the outer side of the shell, is connected to a gas using device; the angle valve switch encoder is connected with an angle valve at the top end of the liquefied petroleum gas tank, and a knob of the angle valve and a handle of the electronic quick stop valve both protrude out of the shell;

the controller receives a first operation command, and performs micro-leakage detection on a gas utilization system consisting of a petroleum liquefied gas tank and a gas outlet unit according to a first signal and a second signal under a set condition; the angle valve and the electronic quick stop valve are opened, and the gas-using equipment is closed.

According to the technical scheme, the technical scheme of the invention has the following beneficial effects:

the invention provides a safety device, a safety control method and a safety control system for a liquefied petroleum gas tank, and relates to the field of gas safety; the safety device comprises a shell, an air outlet unit, a controller, a gas sensor and a differential pressure sensor, wherein the gas sensor and the differential pressure sensor are respectively in communication connection with the controller; the shell is used for placing a petroleum liquefied gas tank, the gas outlet unit comprises a gas outlet pipe connected with a gas outlet of the petroleum liquefied gas tank and gas equipment, an angle valve switch encoder communicated with the controller, a pressure regulating valve and an electronic quick stop valve which are arranged on the gas outlet pipe at intervals, and the electronic quick stop valve is electrically connected with the controller; the gas sensor is used for detecting the real-time concentration of combustible gas in the shell, generating a first signal and sending the first signal to the controller, the differential pressure sensor is connected in parallel with the electronic quick stop valve and used for detecting and calculating the instantaneous flow and the cumulant flow of the gas in the gas pipe, generating a second signal and sending the second signal to the controller, and the controller carries out periodic micro-leakage detection on a gas system consisting of the petroleum liquefied gas tank and the gas outlet unit according to the first signal and the second signal. The invention can realize real-time weight monitoring of the liquefied petroleum gas tank in the using process through the safety device, timely find leakage conditions through gas leakage alarm detection, calculate instantaneous flow and cumulant flow through the differential pressure sensor, realize micro-leakage detection of the liquefied petroleum gas tank gas system under the condition of closing gas equipment, and fully solve all safety monitoring of the liquefied petroleum gas tank in the using process.

The invention also realizes the centralized safety control of the liquefied petroleum gas tank and timely solves the problems of gas leakage and the like by establishing a cloud platform system with all liquefied petroleum gas tank safety devices; and moreover, the liquefied petroleum gas tank is remotely monitored through interaction of the cloud platform system and the mobile terminal, and safety management is further enhanced.

It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of this disclosure unless such concepts are mutually inconsistent.

The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of the specific embodiments according to the teachings of the present invention.

Drawings

The figures are not intended to be drawn to scale with true references. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a flow chart of the method for controlling the safety of a liquefied petroleum gas tank according to the present invention;

FIG. 2 is a block diagram showing the construction of a safety control system for liquefied petroleum gas storage tanks according to the present invention;

FIG. 3 is a schematic view showing the structure of the safety device for liquefied petroleum gas storage tank according to the present invention;

fig. 4 is a schematic connection diagram of the safety monitoring of the liquefied petroleum gas storage tank safety device according to the present invention.

In the figure, the specific meaning of each mark is:

the device comprises a shell 1, a gas outlet pipe 2, an angle valve switch encoder 3, a pressure regulating valve 4, an electronic quick stop valve 5, a gas sensor 6, a differential pressure sensor 7, a controller 8, a petroleum liquefied gas tank 9, a weighing sensor 10, a quick-opening connector 11 and a temperature sensor 12.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention. Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Similarly, the singular forms "a," "an," or "the" do not denote a limitation of quantity, but rather denote the presence of at least one, unless the context clearly dictates otherwise. The terms "comprises" or "comprising," and the like, mean that the elements or components listed in the preceding list of elements or components include the features, integers, steps, operations, elements and/or components listed in the following list of elements or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships may also be changed accordingly.

If combustible gas leaks in the use process of the current petroleum liquefied gas tank, the safety hazard is great; the factors causing combustible gas leakage are many, and the existing gas leakage detection methods have defects and cannot be comprehensively monitored. The invention aims to design a device capable of comprehensively realizing safety monitoring in the use process of a liquefied petroleum gas tank, namely a liquefied petroleum gas tank safety device, a safety control method and a system, and ensures the safety of the liquefied petroleum gas tank in the use process by effectively monitoring all factors influencing the safety of the liquefied petroleum gas tank.

The following describes the safety device, safety control method and system for liquefied petroleum gas tank disclosed in the present invention with reference to the accompanying drawings and embodiments.

In connection with the embodiment shown in fig. 3 and 4, the liquefied petroleum gas tank safety device includes a housing 1, a gas outlet unit, a gas sensor 6, a differential pressure sensor 7, and a controller 8; when connected, gas sensor 6 and differential pressure sensor 7 are each communicatively connected to controller 8. As shown in the figure, the liquefied petroleum gas tank 9 is configured as a half-open chamber, so that in order to detect the current placement state of the liquefied petroleum gas tank 9, a liquefied petroleum gas tank 9 is arranged and arranged in the housing 1; the gas outlet unit comprises a gas outlet pipe 2 connected with a gas outlet of the petroleum liquefied gas tank 9, an angle valve switch encoder 3 in communication connection with the controller 8, a pressure regulating valve 4 and an electronic quick stop valve 5 which are arranged on the gas outlet pipe 2 at intervals, wherein the electronic quick stop valve 5 is electrically connected with the controller 8, and the electronic quick stop valve 5 can be controlled to start by the controller 8; as shown in the figure, the pressure regulating valve 4 and the electronic quick stop valve 5 are both positioned in the shell 1; the end part of the gas outlet pipe 2 far away from the liquefied petroleum gas tank 9 extends to the outer side of the shell 1, and the end part of the gas outlet pipe located on the outer side of the shell 1 is connected with gas equipment; the angle valve switch encoder 3 is connected with an angle valve at the top end of the petroleum liquefied gas tank 9, and a knob of the angle valve and a handle of the electronic quick stop valve 5 are both protruded out of the shell 1.

In order to find out the combustible gas leakage condition of the petroleum liquefied gas tank in time, the gas sensor 6 is arranged below the inner side of the shell 1 and used for detecting the real-time concentration of the combustible gas in the shell 1, generating a first signal and sending the first signal to the controller 8; in order to facilitate the pressure reduction detection of the liquefied petroleum gas and the static micro-leakage detection of the gas outlet unit, the differential pressure sensor 7 is connected in parallel with the electronic quick stop valve 5 and is used for detecting and calculating the instantaneous flow and the cumulant flow of the gas in the gas pipe 2, generating a second signal and sending the second signal to the controller 8; when the angle valve and the electronic quick stop valve 5 are opened and the gas-using equipment is closed, the controller 8 performs periodic micro-leakage detection on the gas-using system consisting of the liquefied petroleum gas tank 9 and the gas outlet unit according to the first signal and the second signal.

In order to monitor all factors affecting the use process of the petroleum liquefied gas cylinder 9, the safety device also comprises a weighing sensor 10 and a temperature sensor. As shown in fig. 3, the weighing sensor 10 is arranged at the bottom of the housing 1 and is used for detecting the real-time weight of the liquefied petroleum gas tank 9 in the housing 1 and generating a third signal to be sent to the controller 8; the controller 9 may calculate the weight of the liquefied gas in the liquefied petroleum gas tank 9 in real time according to the third signal, so as to perform micro-leakage detection of the gas system in combination with real-time detection data of the differential pressure sensor 7. For example, when the liquefied gas consumption amount calculated from the instantaneous flow rate, the cumulative flow rate detected by the differential pressure sensor 7 is smaller than the liquefied gas consumption amount obtained from the load cell 10, it can be regarded as an evaluation condition having a gas leak. The temperature sensor 12 is arranged on the inner wall of the shell 1 and used for detecting the temperature of the side wall of the shell 1, generating a fourth signal and sending the fourth signal to the controller 8; for example, when the controller 10 detects a temperature abnormality of the side wall of the casing 1, it evaluates that a fire may occur outside the casing 1, and issues an alarm prompt to perform an emergency cut-off of the combustible gas.

As an alternative embodiment, the differential pressure sensor 7 may be connected in series with a pressure sensor synchronously, so that when a leak is detected, the change in the differential pressure is used as a determination condition, and the pressure drop is also used as a determination condition, and when any one of the change in the differential pressure and the pressure drop occurs, the leak is regarded as the external air equipment leak.

For the convenience of using the shell 1, as an optional implementation structure, the shell 1 of the semi-open chamber is provided with a barrel-shaped structure and comprises a barrel body with an open top and an upper cover detachably connected with the barrel body; the outer wall of the barrel body is provided with a plurality of hollowed holes, and a knob of the angle valve and a handle of the electronic quick stop valve 5 protrude out of the shell 1 from the hollowed holes, so that a user can operate the knob for opening the angle valve from the outer side of the shell 1 to conduct the gas using system and subsequently close the electronic quick stop valve 5 to block gas using.

As an optional implementation structure, the shell 1 of the semi-open chamber is arranged into a barrel-shaped structure and comprises a barrel body with an open top and an upper cover detachably connected with the barrel body; a bayonet is arranged at the position of the upper cover corresponding to the angle valve at the top end of the petroleum liquefied gas tank 9, and the bayonet is clamped on a knob of the angle valve so as to be convenient for manually operating the knob of the angle valve from the outer side of the shell 1 to open or close the angle valve; meanwhile, an opening is formed in the position, corresponding to the electronic quick stop valve 5, of the upper cover, and a handle of the electronic quick stop valve 5 protrudes out of the shell 1 from the opening so that the electronic quick stop valve 5 can be manually closed by operating the handle of the electronic quick stop valve 5 from the outer side of the shell 1.

For the convenience of using the safety device, a through hole is arranged at the corresponding position of the end parts of the shell 1 and the gas outlet pipe 2 far away from the petroleum liquefied gas tank 9, a quick-opening joint 11 is fixedly arranged at the through hole, and the quick-opening joint 11 is communicated with the gas outlet pipe 2; the controller 8 may be integrated on the housing 1, and include a display unit and a key operation unit, and a user may start the micro leak monitoring by key operation, and view the detection data and the detection result on the display unit. In addition, optionally, an alarm connected with the gas sensor 6 is arranged on the outer wall of the shell 1, and when the concentration of combustible gas detected by the gas sensor 6 exceeds an alarm threshold set by the sensor, an alarm is directly sent out through the alarm.

As an optional implementation manner, the controller 8 includes an NB communication unit, where the NB communication unit is used for the controller 8 to remotely communicate with the cloud platform system, so as to report a periodic micro-leakage detection result of the gas system; the cloud platform system can realize centralized management of the safety devices.

The safety device has the following specific use flow, for example, the liquefied petroleum gas tank is placed in the shell 1, and the sensors of the gas outlet unit are connected in sequence; the positions of the pressure regulating valve 4 and the electronic quick stop valve 5 on the air outlet pipe 2 can be exchanged, and the leakage of the air outlet pipe 2 at two sides of the pressure regulating valve 4 is respectively detected; initializing the position of an angle valve of a liquefied petroleum gas tank in a state that the angle valve is closed, and preparing equipment for detecting gas leakage; subsequently, the controller 8 is operated to perform leakage detection under the conditions that the angle valve is opened, and the electronic quick stop valve 5 is controlled to be opened and the gas-using equipment is closed; the mode of operating the controller 8 can be operated remotely through a key operation unit of the controller 8 or through an intelligent device connected with the controller 8; and finally, after the detection is finished, displaying the detection result on a display unit of the controller 8, and reporting the detection result to the cloud platform system in centralized management.

The safety device for the liquefied petroleum gas tank disclosed by the invention can realize real-time weight monitoring of the liquefied petroleum gas tank and estimate the weight of liquefied gas, can find leakage conditions in time through combustible gas leakage alarm detection, can calculate instantaneous flow and cumulant flow by the differential pressure sensor 7, can detect micro leakage of a gas utilization system and the like, is comprehensive in monitoring, and can effectively guarantee the gas utilization safety of the liquefied petroleum gas tank.

Referring to fig. 1, another embodiment of the present invention discloses a method for controlling the safety of a liquefied petroleum gas tank, which includes the following steps:

step S102, a cloud platform system is built, so that the controller 8 of each liquefied petroleum gas tank safety device is in communication connection with the cloud platform system; for example, the cloud platform system communicates with the controller 8 through the NB communication unit, and the cloud platform system numbers all the liquefied petroleum gas tank security devices with which it communicates, so as to manage the numbers;

step S104, receiving a first operation command for any one liquefied petroleum gas tank safety device, wherein the first operation command is to start a micro-leakage detection program for the liquefied petroleum gas tank 9 according to preset conditions; the preset conditions comprise a gas leakage judgment standard and detection time; the first operation command is sent by a manually operated liquefied petroleum gas tank safety device or sent by a cloud platform system remote communication liquefied petroleum gas tank safety device;

optionally, the gas leakage determination criteria include a plurality of set combustible gas concentration alarm thresholds, combustible gas concentration change rate thresholds, and the like, set risk levels of each gas leakage, and alarm prompts corresponding to the risk levels of each gas leakage.

Step S106, micro-leakage detection is carried out according to the first operation command, the detection result of any micro-leakage detection is judged, and the detection result is reported to a cloud platform system; when the liquefied petroleum gas tank 9 is judged to have gas leakage, leakage alarms are respectively prompted in the liquefied petroleum gas tank safety device and the cloud platform system;

the condition that the gas leakage of the petroleum liquefied gas tank 9 is judged comprises the steps that when the concentration of the combustible gas detected by the gas sensor 6 reaches a set alarm threshold value of any combustible gas concentration and/or the concentration change of the combustible gas calculated according to the detected combustible gas concentration reaches a set change rate threshold value of any combustible gas concentration, the fact that a gas system has micro leakage is judged; the level of the alarm prompting leakage is determined by the alarm threshold value of the combustible gas concentration and the threshold value of the change rate of the combustible gas concentration detected by the gas sensor 6 and the controller 8.

Step S108, receiving a second operation command to the liquefied petroleum gas tank safety device with gas leakage, wherein the second operation command is used for overhauling the liquefied petroleum gas tank; the second operation command can also be sent by a manually operated liquefied petroleum gas tank safety device or a cloud platform system remote communication liquefied petroleum gas tank safety device;

and S110, after the maintenance is finished, reporting the gas leakage reason to a cloud platform system so that the cloud platform system can record and trace the service condition of the liquefied petroleum gas tank safety device.

As an optional implementation manner, the control method of the embodiment further includes: receiving a third operation command for any one liquefied petroleum gas tank safety device, wherein the third operation command is to automatically start a micro-leakage detection program for the liquefied petroleum gas tank according to a preset period, and report and record a detection result; the third operation command is mainly aimed at making the safety device of the liquefied petroleum gas tank perform periodic self-check so as to permanently monitor the leakage condition of the gas system of the liquefied petroleum gas tank 9.

As an optional implementation manner, the control method of the embodiment further includes performing remote monitoring on the liquefied petroleum gas tank safety device through interaction between the mobile terminal and the cloud platform system, and specifically includes: receiving a remote viewing request sent by a mobile terminal through a cloud platform system, wherein the remote viewing request comprises the number of a to-be-viewed liquefied petroleum gas tank safety device and a to-be-viewed time range; feeding back the detection times of the corresponding numbered liquefied petroleum gas tank safety device in the micro-leakage detection time range requested to be checked and the corresponding detection result; and sending the leakage alarm to the corresponding mobile terminal through the cloud platform system so that the mobile terminal user can process the leakage alarm.

In an embodiment of the present invention, there is also provided an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the method for controlling the safety of the liquefied petroleum gas tank disclosed in the above embodiments is implemented.

The programs described above may be run on a processor or may also be stored in memory (or referred to as computer-readable storage media), which includes both non-transitory and non-transitory, removable and non-removable media, that implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

These computer programs may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks, and corresponding steps may be implemented by different modules.

This embodiment provides an apparatus or system, referred to as a liquefied petroleum gas tank security control system, which comprises, in addition to the cloud platform system and a plurality of liquefied petroleum gas tank security apparatuses communicatively connected to the cloud platform system as shown in fig. 2, further comprising: the device comprises a first receiving module, a second receiving module and a third receiving module, wherein the first receiving module is used for receiving a first operation command for any one liquefied petroleum gas tank safety device, and the first operation command is to start a micro-leakage detection program for the liquefied petroleum gas tank according to a preset condition; wherein the preset conditions comprise a gas leakage judgment standard and detection time; the first operation command is sent by a manually operated liquefied petroleum gas tank safety device or sent by a cloud platform system remote communication liquefied petroleum gas tank safety device; the judging module is used for carrying out micro-leakage detection according to the first operation command, judging the detection result of any one-time micro-leakage detection and reporting the detection result to the cloud platform system; when the liquefied petroleum gas tank is judged to have gas leakage, respectively prompting leakage alarms in the liquefied petroleum gas tank safety device and the cloud platform system; the second receiving module is used for receiving a second operation command of the liquefied petroleum gas tank safety device with gas leakage, and the second operation command is used for overhauling the liquefied petroleum gas tank; and the reporting module is used for reporting the gas leakage reason to the cloud platform system after the maintenance is finished. The system is used for implementing the functions of the method in the above embodiments, and each module of the system corresponds to each step in the method, which has already been described in the method and is not described herein again.

As a specific embodiment of the safety device for the liquefied petroleum gas tank in the liquefied petroleum gas tank safety control system, the structure of the safety device for the liquefied petroleum gas tank comprises a shell 1, a gas outlet unit, a controller 8, a gas sensor 6 and a differential pressure sensor 7 which are respectively connected to the controller 8 in a communication mode, and the controller 8 is connected to a cloud platform system in a communication mode.

As shown in fig. 3, the housing 1 is provided as a half-open chamber for accommodating a liquefied petroleum gas tank 9; the gas outlet unit comprises a gas outlet pipe 2 connected with a gas outlet of a petroleum liquefied gas tank 9, an angle valve switch encoder 3 which is communicated with a controller 8, a pressure regulating valve 4 and an electronic quick stop valve 5 which are arranged on the gas outlet pipe 2 at intervals, and the electronic quick stop valve 5 is electrically connected with the controller 8; the end part of the gas outlet pipe 2 far away from the petroleum liquefied gas tank 9 extends to the outer side of the shell 1 to be connected with gas equipment; the angle valve switch encoder 3 is connected to the angle valve at the top end of the petroleum liquefied gas tank 9, and the knob of the angle valve and the handle of the electronic quick stop valve 5 both protrude out of the shell 1 so as to be operated manually by a user.

The gas sensor 6 is arranged below the inner side of the shell 1 and used for detecting the real-time concentration of combustible gas in the shell 1, generating a first signal and sending the first signal to the controller 8; the differential pressure sensor 7 is connected in parallel with the electronic quick stop valve 5 and is used for detecting and calculating the instantaneous flow and the cumulant flow of the gas in the gas pipe 2, generating a second signal and sending the second signal to the controller 8; the controller 8 serves as a first receiving module to receive a first operation command, and micro-leakage detection is carried out on a gas using system consisting of the liquefied petroleum gas tank 8 and the gas outlet unit according to the first signal and the second signal under a set condition; wherein, the set conditions are that the angle valve and the electronic rapid stop valve 5 are opened and the gas equipment is closed.

The method and the system for the safety control of the liquefied petroleum gas tank, disclosed by the embodiment, have the advantages that all the liquefied petroleum gas tank safety devices are managed in a centralized manner through the cloud platform system, not only can all the liquefied petroleum gas tank safety devices be managed in a centralized manner, but also the remote safety supervision on the liquefied petroleum gas tank can be realized, the fault problems such as gas leakage and the like can be timely processed, the safety of the liquefied petroleum gas tank 9 in the use process is fully ensured, and all potential safety hazards in the use process of the liquefied petroleum gas are fundamentally solved.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims

1. The safety device for the liquefied petroleum gas tank is characterized by comprising a shell, a gas outlet unit, a gas sensor and a differential pressure sensor controller, wherein the gas sensor and the differential pressure sensor are respectively in communication connection with the controller;

the gas sensor is arranged below the inner side of the shell and used for detecting the real-time concentration of combustible gas in the shell, generating a first signal and sending the first signal to the controller; the differential pressure sensor is connected in parallel with the electronic quick stop valve and used for detecting and calculating the instantaneous flow and the cumulant flow of the gas in the gas pipe, generating a second signal and sending the second signal to the controller;

2. The liquefied petroleum gas tank safety device according to claim 1, further comprising a load cell and a temperature sensor; the weighing sensor is arranged at the bottom of the shell and used for detecting the real-time weight of the petroleum liquefied gas tank in the shell, generating a third signal and sending the third signal to the controller; the temperature sensor is arranged on the inner wall of the shell and used for detecting the temperature of the side wall of the shell, generating a fourth signal and sending the fourth signal to the controller; the controller is used for calculating the weight of liquefied gas in the liquefied petroleum gas tank in real time according to a third signal so as to detect the micro leakage of the gas using system by combining the real-time detection data of the differential pressure sensor; the controller is used for monitoring the temperature abnormity of the side wall of the shell in real time according to the fourth signal so as to alarm in an emergency.

3. The liquefied petroleum gas storage tank safety device as claimed in claim 1, wherein the housing of the semi-open chamber is configured as a barrel structure including a barrel body with an open top and a cover detachably attached to the barrel body; the outer wall of the barrel body is provided with a plurality of hollowed holes, and the knob of the angle valve and the handle of the electronic quick stop valve protrude out of the shell from the hollowed holes.

4. The liquefied petroleum gas storage tank safety device as claimed in claim 1, wherein the housing of the semi-open chamber is configured as a barrel structure including a barrel body with an open top and a cover detachably attached to the barrel body; a bayonet is arranged at the position of the upper cover corresponding to the angle valve at the top end of the liquefied petroleum gas tank, and the bayonet is clamped on a knob of the angle valve so as to operate the knob of the angle valve from the outer side of the shell to open or close the angle valve; the upper cover is provided with an opening corresponding to the electronic quick stop valve, and a handle of the electronic quick stop valve protrudes out of the shell from the opening so as to be convenient for the handle of the electronic quick stop valve to be operated from the outer side of the shell to manually close the electronic quick stop valve.

5. The liquefied petroleum gas storage tank safety device as claimed in claim 1, wherein the controller comprises an NB communication unit for the controller to remotely communicate with the cloud platform system so as to report periodic micro-leak detection results of the gas system.

6. A safety control method for a liquefied petroleum gas tank is characterized by comprising the following steps:

receiving a first operation command for any one liquefied petroleum gas tank safety device, wherein the first operation command is to start a micro-leakage detection program for the liquefied petroleum gas tank according to a preset condition; wherein the preset conditions comprise a gas leakage judgment standard and detection time; the first operation command is issued by a manually operated liquefied petroleum gas tank safety device or issued by a cloud platform system remote communication liquefied petroleum gas tank safety device;

detecting micro-leakage according to the first operation command, judging the detection result of any micro-leakage detection, and reporting to the cloud platform system; when the liquefied petroleum gas tank is judged to have gas leakage, respectively prompting leakage alarms in the liquefied petroleum gas tank safety device and the cloud platform system;

receiving a second operation command to a liquefied petroleum gas tank safety device with gas leakage, wherein the second operation command is used for overhauling the liquefied petroleum gas tank;

7. A liquefied petroleum gas storage tank safety control method as claimed in claim 6, further comprising:

8. A liquefied petroleum gas storage tank safety control method as claimed in claim 6, further comprising:

feeding back the detection times of the corresponding numbered liquefied petroleum gas tank safety device in the request viewing time range and the corresponding detection result;

9. The utility model provides a liquefied petroleum gas storage tank safety control system, includes cloud platform system and a plurality of liquefied petroleum gas storage tank safety device, arbitrary liquefied petroleum gas storage tank safety device communication connection in cloud platform system, its characterized in that still includes:

the system comprises a first receiving module, a second receiving module and a third receiving module, wherein the first receiving module is used for receiving a first operation command for any one liquefied petroleum gas tank safety device, and the first operation command is used for starting a micro-leakage detection program for the liquefied petroleum gas tank according to a preset condition; wherein the preset conditions comprise a gas leakage judgment standard and detection time; the first operation command is issued by a manually operated liquefied petroleum gas tank safety device or issued by a cloud platform system remote communication liquefied petroleum gas tank safety device;

10. The lpg tank safety control system of claim 9, wherein the lpg tank safety device comprises a housing, an air outlet cell, a controller, and a gas sensor and a differential pressure sensor communicatively coupled to the controller, respectively, the controller communicatively coupled to the cloud platform system;

the controller receives a first operation command, and performs micro-leakage detection on a gas utilization system consisting of a petroleum liquefied gas tank and a gas outlet unit according to a first signal and a second signal under a set condition; the set conditions are that the angle valve and the electronic quick stop valve are opened, and the gas-using equipment is closed.