Fire extinguishing control system

Abstract

The fire extinguishing control system comprises a fire extinguishing device, an information acquisition part and a control device, the fire extinguishing device comprises a supply part and at least one storage part, the supply part is connected with the storage part and used for providing fire extinguishing media for the storage part, and the storage part is connected with the heating furnace and used for providing fire extinguishing media for the heating furnace. The fire extinguishing medium is stored; the information acquisition part is used for acquiring temperature information of the heating furnace and pressure information of the storage part in real time and transmitting the information to the control system; the control device is used for judging whether a fire occurs or not according to the temperature information and controlling the storage part to apply a fire extinguishing medium to the heating furnace when the fire occurs; the control device is further used for controlling the supply part to provide the fire extinguishing medium for the storage part when the pressure information is lower than the set pressure. According to the fire extinguishing control system, the fire extinguishing efficiency can be effectively improved, it is guaranteed that the total amount of the fire extinguishing medium in the storage part can meet the fire extinguishing requirement, and the problem that fire cannot be extinguished when the heating furnace is on fire is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of industrial furnace fire safety, and in particular to a fire extinguishing control system. Background Art

[0002] Heating furnaces are process equipment widely used in the fields of oil refining, petrochemicals, etc. During operation, heating furnaces are prone to sudden fire problems, especially when heating flammable and explosive liquids or gaseous media.

[0003] In the prior art, nitrogen is usually used as a fire extinguishing medium for emergency fire extinguishing of the heating furnace. Nitrogen is usually stored in a nitrogen cylinder and introduced into the heating furnace in case of a sudden fire. However, when the nitrogen cylinder is idle for a long time or the cylinder is damaged, nitrogen will leak and cannot play a role in extinguishing the fire in the event of a fire. In addition, regular inspections are currently used to monitor whether the nitrogen cylinder is leaking and whether the heating furnace is on fire, which greatly affects the efficiency of fire extinguishing and increases safety hazards. Summary of the invention

[0004] In view of this, the present application provides a fire extinguishing control system that can effectively improve fire extinguishing efficiency.

[0005] Specifically, the following technical solutions are included:

[0006] The embodiment of the present disclosure provides a fire extinguishing control system for extinguishing a fire in a heating furnace. The fire extinguishing control system includes a fire extinguishing device, an information acquisition unit and a control device, wherein:

[0007] The fire extinguishing device comprises a supply part and at least one storage part, wherein the supply part is connected to the storage part and is used to provide the fire extinguishing medium to the storage part, and the storage part is connected to the heating furnace and is used to store the fire extinguishing medium;

[0008] The information acquisition unit is used to acquire the temperature information of the heating furnace and the pressure information of the storage unit in real time, and transmit them to the control device;

[0009] The control device is used to determine whether a fire occurs based on the temperature information, and when a fire occurs, control the storage unit to apply a fire extinguishing medium to the heating furnace; the control device is also used to control the supply unit to provide the fire extinguishing medium to the storage unit when the pressure information is lower than a set pressure.

[0010] In an implementation manner of the embodiment of the present disclosure, the information acquisition unit includes at least one temperature sensor, and the temperature sensor is used to acquire the temperature information of the heating furnace.

[0011] The storage part is connected to the heating furnace through a first gas supply passage, and a first solenoid valve is provided on the first gas supply passage. When the temperature information is greater than a set temperature, the control device controls the first solenoid valve to be turned on, and when the temperature information is less than or equal to the set temperature, the control system controls the first solenoid valve to be turned off.

[0012] In another implementation of the embodiment of the present disclosure, the information acquisition unit includes at least one pressure sensor for acquiring the pressure information inside the storage unit in real time;

[0013] The supply unit is connected to the storage unit through a second gas transmission passage, and a second solenoid valve is provided on the second gas transmission passage, wherein when the pressure information is lower than the set pressure, the control device controls the second solenoid valve to be turned on, and when the pressure information is greater than or equal to the set pressure, the second solenoid valve is controlled to be closed.

[0014] In another implementation of the embodiment of the present disclosure, the storage part includes at least one gas storage cylinder. When the storage part includes a plurality of gas storage cylinders, the first gas transmission passage includes a gas transmission main pipe and at least one gas transmission branch pipe, the gas inlet end of the gas transmission main pipe is connected to the supply part, the gas exhaust end is connected to the heating furnace, and each of the gas transmission branches is connected to the gas transmission main pipe;

[0015] The pressure sensor and the first solenoid valve are arranged on the gas main pipe, and the gas branch pipe is connected to the gas storage cylinder and is arranged in a one-to-one correspondence.

[0016] In another implementation of the embodiment of the present disclosure, the heating furnace includes a furnace and a chimney disposed at an exhaust end of the furnace;

[0017] The temperature sensor comprises a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is arranged on the furnace and is used to obtain first temperature information in the furnace, and the second temperature sensor is arranged on the chimney and is used to obtain second temperature information in the chimney;

[0018] When the first temperature information is greater than or equal to a first set temperature, and / or when the second temperature information is greater than or equal to a second set temperature, the control device controls the first solenoid valve to be turned on.

[0019] In another implementation of the embodiment of the present disclosure, the fire extinguishing control system further includes a blocking mechanism, and the blocking mechanism includes a baffle and a driving mechanism;

[0020] The driving mechanism is used to drive the baffle to rotate between a first position and a second position. When the baffle is located at the first position, the baffle closes the chimney.

[0021] In another implementation of the embodiment of the present disclosure, the driving mechanism includes a driving shaft, a first driving arm, a second driving arm, a third driving arm and a driver;

[0022] The first driving arm, the second driving arm and the third driving arm are connected in sequence to form a connecting rod mechanism. The driver is connected to the first driving arm and is used to drive the first driving arm to rotate around a rotating shaft. The axis of the driving shaft is located in a radial cross-section of the chimney. The baffle is fixedly mounted on the driving shaft. The third driving arm is connected to the driving shaft and is used to drive the driving shaft and the baffle to rotate.

[0023] In another implementation of the embodiment of the present disclosure, a pointing structure is fixedly mounted on one end of the driving shaft, and the pointing structure is arranged outside the chimney and is used to identify the position state of the baffle in the chimney;

[0024] When the baffle is located at the first position, the axis of the directional structure is located within the radial cross section of the chimney.

[0025] In another implementation of the embodiment of the present disclosure, the heating furnace includes a furnace, an exhaust pipeline and a chimney, and the exhaust pipeline is used to connect the furnace and the chimney;

[0026] The temperature sensor comprises a third temperature sensor, a fourth temperature sensor and a fifth temperature sensor, wherein the third temperature sensor is arranged on the furnace and is used to obtain third temperature information in the furnace, the fourth temperature sensor is located at the air inlet end of the exhaust pipe and is used to obtain fourth temperature information entering the exhaust pipe, and the fifth temperature sensor is located at the air inlet end of the chimney and is used to obtain fifth temperature information entering the chimney;

[0027] When the third temperature information is greater than or equal to the third set temperature, and / or when the fourth temperature information is greater than or equal to the fourth set temperature, and / or when the fifth temperature information is greater than or equal to the fifth set temperature, it is determined that a fire has occurred, and the control system controls the first solenoid valve to be turned on.

[0028] In another implementation of the embodiment of the present disclosure, a preheating device is provided on the exhaust pipeline, and the fourth temperature sensor, the preheating device and the fifth temperature sensor are arranged in sequence along the gas flow direction in the exhaust pipeline;

[0029] The preheating device is used to achieve heat exchange between the exhaust pipeline and the refrigerant pipeline. At least part of the structure of the refrigerant pipeline is located in the preheating device. One end of the refrigerant pipeline is connected to the fan, and the other end is connected to the burner of the heating furnace.

[0030] The beneficial effects of the technical solution provided by the embodiments of the present application include at least:

[0031] On the one hand, the present disclosure obtains the temperature information of the heating furnace in real time through the information acquisition unit and transmits it to the control device, accurately monitoring whether the heating furnace has caught fire, wherein when the heating furnace catches fire, the control device controls the storage unit to apply the fire extinguishing medium to the heating furnace, so as to achieve the purpose of timely extinguishing the fire, and can effectively improve the efficiency of fire extinguishing and reduce safety hazards. On the other hand, the present disclosure obtains the pressure information in the storage unit for storing nitrogen in real time through the information acquisition unit and transmits it to the control system, accurately monitoring whether the total amount of the fire extinguishing medium in the storage unit is sufficient, wherein when the fire extinguishing medium is insufficient, the control device controls the supply unit to provide the fire extinguishing medium to the storage unit, so as to ensure that the total amount of the fire extinguishing medium in the storage unit can meet the demand for fire extinguishing, and avoid the problem of being unable to extinguish the fire due to insufficient total amount of the fire extinguishing medium when the heating furnace catches fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 A structural diagram of a fire extinguishing control system shown as an exemplary embodiment of the present disclosure;

[0034] Figure 2 A structural diagram of a fire extinguishing control system shown as an exemplary embodiment of the present disclosure;

[0035] Figure 3 A front view of a chimney and a driving mechanism of a fire extinguishing control system according to an exemplary embodiment of the present disclosure;

[0036] Figure 4 A side view of a chimney and a driving mechanism of a fire extinguishing control system and a cross-sectional view of a damper in the chimney are shown for an exemplary embodiment of the present disclosure;

[0037] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0038] Figure 6 A structural diagram of a fire extinguishing control system shown as another exemplary embodiment of the present disclosure;

[0039] Figure 7 The present invention is a structural diagram of a fire extinguishing control system and a storage unit according to another exemplary embodiment of the present invention.

[0040] The reference numerals in the figures represent respectively:

[0041] 10. Fire extinguishing device; 11. Supply unit; 12. Storage unit; 121. Gas cylinder;

[0042] 20. Heating furnace; 21. Furnace; 22. Chimney; 23. Exhaust pipe;

[0043] 30. Information acquisition unit; 31. Temperature sensor; 311. First temperature sensor; 312. Second temperature sensor; 313. Third temperature sensor; 314. Fourth temperature sensor; 315. Fifth temperature sensor; 32. Pressure sensor;

[0044] 40. Control device;

[0045] 50. First gas transmission passage; 51. Gas transmission main pipe; 52. Gas transmission branch pipe;

[0046] 60. First solenoid valve;

[0047] 70. Second gas transmission passage;

[0048] 80. Second solenoid valve;

[0049] 90, blocking mechanism; 91, baffle; 92, driving mechanism; 921, driving shaft; 922, first driving arm; 923, second driving arm; 924, third driving arm; 925, driver; 93, bearing; 94, bearing seat;

[0050] 100. Pointing structure; 110. Preheating device; 120. Refrigerant pipeline; 130. Fan; 140. Burner; 150. Valve; 160. Pressure gauge; 170. Fixing plate; 180. End cover; 190. First sealing ring; 200. Second sealing ring; 210. Return pipeline; 220. Return valve; 230. Third sealing ring; 240. Support structure.

[0051] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] Before further describing the implementation methods of the present application in detail, the directional nouns involved in the embodiments of the present application, such as "upper part", "lower part" and "side part", do not have the meaning of limiting the scope of protection of the present application.

[0054] Unless otherwise defined, all technical terms used in the examples of this application have the same meanings as those generally understood by those skilled in the art. Before further describing the implementation methods of the application in detail, some terms for understanding the examples of this application are explained.

[0055] In the embodiment of the present application, the "heating furnace" involved may also be referred to as a "tubular heating furnace", which is a commonly used equipment for heating crude oil and other media. It mainly uses the flue gas from the combustion of fuel as a heating agent to raise the crude oil and other media flowing in the metal tube or container of the heating furnace to a set temperature.

[0056] In order to make the technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0057] In the related art, nitrogen is usually used as a fire extinguishing medium to carry out emergency fire extinguishing treatment on the heating furnace. Nitrogen is usually stored in a nitrogen cylinder, and the nitrogen is passed into the heating furnace in case of a sudden fire. When the nitrogen cylinder is idle for a long time or the bottle body is damaged, it will cause nitrogen leakage. Therefore, the nitrogen cylinder is usually provided with a pressure gauge for monitoring the internal air pressure of the nitrogen cylinder, and a manual inspection method is used to monitor whether the nitrogen cylinder is leaking and whether the heating furnace is on fire. When the nitrogen cylinder is found to have a leakage problem, the leaking nitrogen cylinder is replaced. However, the manual inspection method is difficult to detect the fire problem in the first time, so it will greatly affect the efficiency of fire extinguishing, and it is easy to cause the fire to spread further, bringing safety hazards. In addition, if the nitrogen cylinder leaks and the nitrogen cylinder is not replaced in time, if a sudden fire occurs, the total amount of nitrogen in the nitrogen cylinder is not enough to achieve the fire extinguishing work of the heating furnace.

[0058] The present application embodiment provides a fire extinguishing control system, such as Figure 1 and as shown, and refer to Figure 2 The fire extinguishing control system is used to extinguish a fire in a heating furnace 20, and includes a fire extinguishing device 10, an information acquisition unit 30 and a control device 40, wherein the fire extinguishing device 10 includes a supply unit 11 and at least one storage unit 12, the information acquisition unit 30 is used to obtain temperature information of the heating furnace 20 and pressure information of the storage unit 12, and transmit them to the control device 40, the control device 40 is used to determine whether a fire occurs according to the temperature information, wherein the pressure information of the storage unit 12 is used to indicate the total amount of fire extinguishing medium in the storage unit 12.

[0059] The supply part 11 is connected to the storage part 12 for providing the fire extinguishing medium to the storage part 12 , and the storage part 12 is connected to the heating furnace 20 for storing the fire extinguishing medium.

[0060] When the pressure information of the storage part 12 is lower than the set pressure, the control device 40 controls the supply part 11 to provide the fire extinguishing medium to the storage part 12, and gradually increases the total amount of the fire extinguishing medium inside the storage part 12. When the pressure information of the storage part 12 is greater than or equal to the set pressure, the control device 40 controls the supply part 11 to stop supplying the fire extinguishing medium to the storage part 12.

[0061] Exemplarily, the fire extinguishing medium may be, for example, a gas that does not support combustion, such as nitrogen. By injecting such a gas into the heating furnace 20, the purpose of extinguishing the fire can be achieved by reducing the oxygen content in the heating furnace 20. The supply unit 11 may be, for example, a nitrogen generator, which is electrically connected to the control device 40. When the pressure information of the storage unit 12 is lower than the set pressure, the nitrogen generator may be started by the control device 40 to provide nitrogen to the storage unit 12. When the pressure information of the storage unit 12 is greater than or equal to the set pressure, it can be considered that the total amount of nitrogen in the storage unit 12 can meet the fire extinguishing requirements. At this time, the nitrogen generator may be controlled by the control device 40 to stop running, that is, to stop supplying nitrogen to the storage unit 12.

[0062] When the temperature information of the heating furnace 20 is greater than the set temperature, the control device 40 can determine that a fire has occurred in the heating furnace 20. When a fire occurs, the control device 40 controls the storage unit 12 to apply a fire extinguishing medium into the heating furnace 20. During the fire extinguishing process, the information acquisition unit 30 acquires the temperature information of the heating furnace 20 in real time, and when the temperature information is less than or equal to the set temperature, the storage unit 12 can be controlled to stop applying the fire extinguishing medium into the heating furnace 20.

[0063] In this embodiment, the temperature information of the heating furnace 20 is obtained in real time by the information acquisition unit 30 and transmitted to the control device 40, and the heating furnace 20 is accurately monitored for fire. When the heating furnace 20 catches fire, the control device 40 controls the storage unit 12 to apply the fire extinguishing medium to the heating furnace 20, so as to achieve the purpose of timely fire extinguishing, and can effectively improve the fire extinguishing efficiency and reduce safety hazards. In addition, the pressure information in the storage unit 12 for storing nitrogen is obtained in real time by the information acquisition unit 30 and transmitted to the control device 40, and the total amount of the fire extinguishing medium in the storage unit is accurately monitored for sufficiency. When the fire extinguishing medium is insufficient, the control device 40 controls the supply unit 11 to provide the fire extinguishing medium to the storage unit 12, so as to ensure that the total amount of the fire extinguishing medium in the storage unit 12 can meet the demand for fire extinguishing, and avoid the problem that the fire cannot be extinguished when the heating furnace 20 catches fire.

[0064] In some embodiments of the present application, continue to refer to Figure 2The information acquisition unit 30 includes at least one temperature sensor 31 , and the temperature sensor 31 is used to acquire temperature information of the heating furnace 20 .

[0065] Exemplarily, the temperature sensor 31 can convert the temperature information of the heating furnace 20 into an electrical signal and transmit the electrical signal to the control device 40. The control device 40 converts the electrical signal into a digital signal representing the temperature value. The control device 40 can also calculate and obtain the average value of the temperature values ​​obtained within a preset period of time and display it. When the average value of the temperature value is greater than the set temperature, it can be considered that a fire has occurred in the heating furnace 20.

[0066] like Figure 2 As shown, the storage part 12 is connected to the heating furnace 20 through a first gas transmission passage 50, and a first electromagnetic valve 60 is provided on the first gas transmission passage 50. The control device 40 can be electrically connected to the first electromagnetic valve 60. When the temperature information is greater than the set temperature, the control device 40 controls the first electromagnetic valve 60 to be turned on; when the temperature information is less than or equal to the set temperature, the control device 40 controls the first electromagnetic valve 60 to be closed to stop applying the fire extinguishing medium into the heating furnace 20.

[0067] In this embodiment, the control device 40 can automatically control the opening and closing of the first solenoid valve 60 according to the temperature information of the heating furnace 20, which can effectively improve the conduction rate of the first gas supply passage 50. When the first gas supply passage 50 is turned on, the fire extinguishing medium in the storage part 12 is applied to the heating furnace 20, and the fire extinguishing work in the heating furnace 20 is realized through the fire extinguishing medium, thereby achieving the purpose of timely fire extinguishing.

[0068] In some embodiments of the present application, reference Figure 2 The information acquisition unit 30 includes at least one pressure sensor 32 for acquiring pressure information inside the storage unit 12 in real time.

[0069] Exemplarily, the pressure sensor 32 can convert the pressure information of the storage unit 12 into an electrical signal and transmit the electrical signal to the control device 40. The control device 40 converts the electrical signal into a digital signal representing the pressure value. The control device 40 can also calculate and obtain the average of the pressure values ​​obtained within a preset time period and display it. When the average of the pressure values ​​is less than the set pressure, it can be considered that the total amount of fire extinguishing medium in the storage unit 12 is insufficient.

[0070] like Figure 2As shown, the supply part 11 and the storage part 12 are connected through a second gas supply passage 70, and a second solenoid valve 80 is provided on the second gas supply passage 70. The control device 40 is electrically connected to the second solenoid valve 80 and the supply part 11. When the pressure information is lower than the set pressure, the control device 40 controls the second solenoid valve 80 to be turned on and controls the supply part 11 to operate. When the pressure information is greater than or equal to the set pressure, the second solenoid valve 80 is controlled to be closed and the supply part 11 is controlled to stop operating.

[0071] Exemplarily, the set pressure may include a first threshold pressure, a rated pressure and a second threshold pressure, the first threshold pressure is less than the second threshold pressure, when the pressure information is less than the first threshold pressure, the second solenoid valve 80 is controlled to open, when the pressure information is greater than the second threshold pressure, the second solenoid valve 80 is controlled to close.

[0072] The rated pressure may be, for example, 1.5 MPa, the first threshold pressure may be 1.45 MPa, and the second threshold pressure may be 1.55 MPa, but the present invention is not limited thereto.

[0073] In this embodiment, the control device 40 automatically controls the opening and closing of the second solenoid valve 80 according to the pressure information of the storage part 12, which can effectively improve the conduction rate of the second gas transmission path. When the second gas transmission path is conductive and the supply part 11 is running, the supply part 11 provides the fire extinguishing medium to the storage part 12, thereby ensuring that the fire extinguishing medium in the storage part 12 can always meet the demand for extinguishing the fire in the heating furnace 20, so as to effectively avoid the problem of being unable to extinguish the fire in the heating furnace 20 due to leakage of the storage part 12.

[0074] In some embodiments of the present application, Figure 6 As shown, combined with Figure 7 The storage part 12 includes a plurality of gas cylinders 121, and the first gas transmission passage 50 includes a gas transmission main pipe 51 and at least one gas transmission branch pipe 52. The gas inlet end of the gas transmission main pipe 51 is connected to the supply part 11, and the exhaust end is connected to the heating furnace 20. Each gas transmission branch pipe 52 is connected to the gas transmission main pipe 51.

[0075] The total volume of the gas cylinders 121 , that is, the volume of the storage portion 12 , can be determined according to the volume of the furnace 21 of the heating furnace 20 .

[0076] The pressure sensor 32 and the first solenoid valve 60 are arranged on the gas supply main pipe 51 , and the gas supply branch pipe 52 is connected to the gas storage bottle 121 and is arranged one-to-one.

[0077] In this embodiment, the gas cylinders 121 connected one-to-one with the gas delivery branch pipes 52 are independent of each other and do not interfere with each other. When a leakage problem occurs in the storage part 12, only the leaking gas cylinder 121 needs to be replaced or repaired, thereby effectively reducing the overall maintenance cost of the storage part 12.

[0078] In one embodiment, each gas branch pipe 52 is provided with a valve 150 for controlling the opening and closing of the gas branch pipe 52, and each storage unit 12 may be provided with a pressure gauge 160, wherein the pressure gauge 160 is used to display the pressure information of the corresponding storage unit 12. When the control device 40 obtains the pressure information and determines that a leakage problem occurs in the storage unit 12, the staff can determine the specific leaking gas cylinder 121 according to the readings of each pressure gauge 160, and replace it separately.

[0079] In this embodiment, when the storage section 12 as a whole leaks, the readings of the pressure gauges 160 corresponding to the storage sections 12 can be observed, and after closing the valve 150 on the gas branch pipe 52 corresponding to the leaking storage section 12, the gas cylinder 121 can be replaced, thereby effectively improving the speed of repairing the storage section 12.

[0080] In other embodiments, Figure 1 and Figure 2 As shown, the storage part 12 is only composed of one gas cylinder 121, and the first gas delivery passage 50 is a gas delivery pipeline connecting the storage part 12 and the heating furnace 20. The first solenoid valve 60 and the pressure sensor 32 can be both arranged on the gas delivery pipeline, and the pressure gauge 160 and the valve 150 are arranged on the gas delivery channel. Of course, it can be understood that the pressure gauge 160 can also be arranged on the gas cylinder 121.

[0081] The volume of the gas storage cylinder 121 may be determined according to the volume of the furnace chamber 21 of the heating furnace 20 .

[0082] In some embodiments of the present application, the heating furnace 20 includes a furnace 21 and a chimney 22 disposed at an exhaust end of the furnace 21 , and the furnace 21 and the chimney 22 are integrally disposed.

[0083] Continue to refer Figure 2 The temperature sensor 31 includes a first temperature sensor 311 and a second temperature sensor 312. The first temperature sensor 311 is arranged on the furnace 21 to obtain first temperature information in the furnace 21, and the second temperature sensor 312 is arranged on the chimney 22 to obtain second temperature information in the chimney 22. The second temperature sensor 312 can be specifically arranged on a side close to the air inlet end of the chimney 22, or in other words, the second temperature sensor 312 can be specifically arranged on a side close to the exhaust end of the furnace 21.

[0084] When the first temperature information is greater than or equal to the first set temperature, or when the second temperature information is greater than or equal to the second set temperature, or when the first temperature information is greater than or equal to the first set temperature and the second temperature information is greater than or equal to the second set temperature, the control device 40 controls the first solenoid valve 60 to be turned on.

[0085] Exemplarily, in the absence of a fire, the normal operating temperatures of the furnace 21 and the chimney 22 are 700° C. and 160° C. respectively, the first set temperature may be 850° C., and the second set temperature may be 350° C., but not limited thereto.

[0086] In this embodiment, a first temperature sensor 311 and a second temperature sensor 312 are respectively provided in the furnace 21 and the chimney 22, and the information collected by the first temperature sensor 311 and the second temperature sensor 312 is used as a criterion for determining whether a fire has occurred. This can effectively improve the accuracy of fire monitoring by the fire extinguishing control system, and ensure that when a fire occurs, the fire extinguishing control system can promptly start the fire extinguishing process, thereby improving the fire extinguishing efficiency and reducing safety hazards.

[0087] In some embodiments of the present application, reference Figure 3 , and combined with Figure 4 The negative pressure heating furnace 20 includes a furnace 21 and a chimney 22 that are integrally connected. The fire extinguishing control system used therefor also includes a sealing mechanism 90, which is arranged on the exhaust path of the chimney 22 and includes a baffle 91 and a driving mechanism 92.

[0088] The driving mechanism 92 is used to drive the baffle 91 to rotate between the first position and the second position. When the baffle 91 is in the first position, the baffle 91 closes the chimney 22. At this time, the plate surface of the baffle 91 can be parallel to the radial cross section of the chimney 22. When the baffle 91 is in the second position, the plate surface of the baffle 91 can be perpendicular to the radial cross section of the chimney 22. At this time, the resistance of the baffle 91 to the exhaust of smoke from the chimney 22 can be minimized.

[0089] Among them, when no fire occurs, the baffle 91 of the sealing mechanism 90 can be located in the second position, or in any position between the first position and the second position. At this time, the furnace 21 is connected to the outside space through the chimney 22, and the smoke is discharged to the outside space. When a fire occurs in the heating furnace 20, the control device 40 controls the storage unit 12 to apply the fire extinguishing medium into the furnace 21 of the heating furnace 20. At the same time, the control device 40 controls the driving mechanism 92 to drive the baffle 91 to rotate to the first position. In this process, part of the oxygen inside the furnace 21 is discharged to the outside space through the chimney 22. When the baffle 91 rotates to the first position, the fire extinguishing medium is discharged to the outside space through the chimney 22. Figure 4 In the first position shown, the driving mechanism 92 stops running, and the baffle 91 blocks the chimney 22, so that the furnace 21 is isolated from the external space, and the fire extinguishing medium applied to the furnace 21 is prevented from being sucked into the external space under the action of negative pressure, thereby ensuring the fire extinguishing effect and improving the fire extinguishing efficiency.

[0090] In this embodiment, the chimney 22 is sealed by the baffle 91, which can ensure the sealing of the furnace 21 during fire extinguishing, and avoid the problem of the fire extinguishing medium being sucked into the external space under the action of negative pressure, and the concentration of the fire extinguishing medium in the furnace 21 decreasing, so as to ensure that the fire extinguishing work can be carried out smoothly and the fire extinguishing efficiency can be effectively improved.

[0091] In some embodiments of the present disclosure, reference Figure 3 Combined with Figure 4 The driving mechanism 92 includes a driving shaft 921 , a first driving arm 922 , a second driving arm 923 , a third driving arm 924 and a driver 925 .

[0092] The first driving arm 922, the second driving arm 923 and the third driving arm 924 are connected in sequence to form a connecting rod mechanism. The driver 925 is connected to the first driving arm 922 and is installed on the outside of the chimney 22 through the supporting structure 240, and is used to drive the first driving arm 922 to rotate around the rotating axis. The axis of the driving shaft 921 is located in the radial cross-section of the chimney 22 and is arranged to pass through the wall of the chimney 22. The baffle 91 is fixedly installed on the driving shaft 921. The third driving arm 924 is connected to the driving shaft 921, and is used to realize the rotation of the driving shaft 921 and the baffle 91.

[0093] The driver 925 is electrically connected to the control device 40. When a fire occurs in the heating furnace 20, the control device 40 controls the driver 925 to operate. After the baffle 91 is controlled to rotate to the first position, the control device 40 controls the driver 925 to stop operating. The first driving arm 922 and the second driving arm 923 are rotatably connected. The second driving arm 923 and the third driving arm 924 are rotatably connected. When the baffle 91 is driven to move by the driving mechanism 92, the driver 925 of the driving structure drives the first driving arm 922 to rotate around the rotating shaft of the driver 925. The first driving arm 922 drives the second driving arm 923 movably connected thereto to rotate. The second driving arm 923 further drives the third driving arm 924 movably connected thereto, the driving shaft 921 fixedly connected to the third driving arm 924, and the baffle 91 fixedly mounted on the driving shaft 921 to rotate. The first driving arm 922 and the third driving arm 924 always remain parallel to each other during the movement.

[0094] In this embodiment, a connecting rod mechanism consisting of a first driving arm 922, a second driving arm 923 and a third driving arm 924 is used to accurately adjust the rotation angle of the baffle 91. When it is necessary to block the chimney 22, the deviation between the actual position of the baffle 91 and the first position is reduced, thereby ensuring the blocking effect of the baffle 91 on the chimney 22, thereby ensuring the sealing of the interior of the furnace 21 during fire extinguishing.

[0095] In some embodiments, continue to refer to Figure 4 , and combined with Figure 5The sealing mechanism 90 also includes bearings 93 installed at both ends of the driving shaft 921 and a bearing seat 94 for installing the bearings 93. The bearing seat 94 is arranged to pass through the side wall of the chimney 22, and a through hole for installing the driving shaft 921 is arranged at the center thereof. The bearing seat 94 is installed on the chimney 22 through a fixing plate 170, and an end cover 180 is installed on the side of the bearing seat 94 away from the chimney 22.

[0096] Among them, a first sealing ring 190 is arranged between the bearing seat 94 and the fixed plate 170, and a second sealing ring 200 is arranged on one side of the bearing seat 94 inside the chimney 22. The inner wall of the second sealing ring 200 contacts the drive shaft 921. When the baffle 91 rotates to the first position, the baffle 91 contacts the side of the second sealing ring 200. A third sealing ring 230 is arranged between the bearing 93 and the bearing seat 94.

[0097] In this embodiment, the end cap 180 disposed on the outside of the bearing seat 94 can provide good protection for the drive shaft 921, and the bearings 93 are disposed at both ends of the drive shaft 921, which can improve the flexibility of the rotation of the drive shaft 921 and reduce the rotation error of the drive shaft 921, so that when extinguishing a fire, the baffle 91 can accurately rotate to the first position to ensure the blocking effect of the baffle 91 on the chimney 22. The first sealing ring 190, the second sealing ring 200 and the third sealing ring 230 cooperate with each other to prevent smoke leakage in the chimney 22 and improve safety.

[0098] Exemplarily, the drive shaft 921 is made of φ50Q235-A round steel, and the bearing seat 94 is made of φ90Q235-A round steel. The use of the above-mentioned round steel can reduce the production cost of the drive shaft 921 and the bearing seat 94, and can ensure that the drive shaft 921 and the bearing 93 have smaller friction resistance, making the rotation of the bearing seat 94 and the drive shaft 921 more flexible.

[0099] In some embodiments of the present application, reference Figure 3 A pointing structure 100 is fixedly installed at one end of the driving shaft 921 . The pointing structure 100 is arranged outside the chimney 22 and is used to mark the position status of the baffle 91 in the chimney 22 .

[0100] The plane where the axis of the pointer structure is located is always parallel to the plate surface of the baffle 91 . When the baffle 91 is located at the first position, the axis of the pointing structure 100 is located in the radial cross section of the chimney 22 .

[0101] Exemplarily, the directing structure 100 may be linear, for example, a strip-shaped structure.

[0102] In this embodiment, the actual position status of the baffle 91 in the chimney 22 can be intuitively determined through the pointer structure. During the fire extinguishing process, when the driver 925 stops running, if the pointer structure is parallel to the radial section of the chimney 22, it means that the baffle 91 has achieved good sealing of the chimney 22. If the pointer structure is skewed, it indicates that the actual position of the baffle 91 deviates from the first position. At this time, the staff can control the driver 925 through the control device 40 to readjust the position of the baffle 91 and perform maintenance after the fire extinguishing process.

[0103] In other embodiments of the present application, Figure 6 As shown, the heating furnace 20 includes a furnace 21 , an exhaust pipe 23 and a chimney 22 . The exhaust pipe 23 is used to connect the furnace 21 and the chimney 22 . The furnace 21 , the exhaust pipe 23 and the chimney 22 constitute a positive pressure heating furnace 20 .

[0104] The temperature sensor 31 includes a third temperature sensor 313, a fourth temperature sensor 314 and a fifth temperature sensor 315. The third temperature sensor 313 is arranged on the furnace 21, and is used to obtain the third temperature information in the furnace 21. The fourth temperature sensor 314 is located at the air intake end of the exhaust pipe 23, and is used to obtain the fourth temperature information entering the exhaust pipe 23. The fifth temperature sensor 315 is located at the air intake end of the chimney 22 or the exhaust end of the exhaust pipe 23, and is used to obtain the fifth temperature information entering the chimney 22.

[0105] When the third temperature information is greater than or equal to the third set temperature, and / or when the fourth temperature information is greater than or equal to the fourth set temperature, and / or when the fifth temperature information is greater than or equal to the fifth set temperature, it is determined that a fire has occurred, and the control device 40 controls the first solenoid valve 60 to be turned on.

[0106] Exemplarily, in the absence of a fire, the normal operating temperatures of the furnace 21, the exhaust pipe 23 and the chimney 22 are 900°C, 200°C and 150°C respectively, the third set temperature may be 950°C, the fourth set temperature may be 400°C, and the fifth set temperature may be 350°C, but are not limited thereto.

[0107] In this embodiment, a third temperature sensor 313, a fourth temperature sensor 314 and a fifth temperature sensor 315 are respectively provided on the furnace 21, the exhaust pipe 23 and the chimney 22, and the information collected by the third temperature sensor 313, the fourth temperature sensor 314 and the fifth temperature sensor 315 is used as a criterion for determining whether a fire has occurred. This can effectively improve the accuracy of fire monitoring by the fire extinguishing control system, and ensure that when a fire occurs, the fire extinguishing control system can promptly start the fire extinguishing process, thereby improving the fire extinguishing efficiency and reducing safety hazards.

[0108] In some embodiments of the present application, continue to refer to Figure 6 A preheating device 110 is provided on the exhaust pipe 23 , and the fourth temperature sensor 314 , the preheating device 110 and the fifth temperature sensor 315 are arranged in sequence along the gas flow direction in the exhaust pipe 23 .

[0109] The preheating device 110 is used to realize heat exchange between the exhaust pipeline 23 and the refrigerant pipeline 120. At least part of the structure of the refrigerant pipeline 120 is located in the preheating device 110. One end of the refrigerant pipeline 120 is connected to the fan 130, and the other end is connected to the burner 140 of the heating furnace 20.

[0110] In this embodiment, the gas in the refrigerant pipeline 120 is preheated by the preheating device 110, the initial temperature of the gas injected into the burner 140 is increased, and the final temperature of the gas after heating entering the burner 140 is increased, so as to realize the preheating and recycling of the flue gas in the exhaust pipeline 23.

[0111] In some embodiments, continue to refer to Figure 6 The preheating device 110 is further provided with a return pipeline 210, the air inlet end of the return pipeline 210 is connected to the exhaust end of the refrigerant pipeline 120, and the exhaust end of the return pipeline 210 is connected to the air inlet end of the refrigerant pipeline 120. The return pipeline 210 is provided with a return valve 220 for controlling the opening and closing of the return pipeline 210.

[0112] In this embodiment, when the temperature of the gas in the return pipe 210 is low, the return valve 220 can be opened, and the gas heated by the air preheater re-enters the refrigerant pipe 120 located in the preheating device 110 through the return pipe 210 for secondary preheating, so as to avoid the gas temperature in the refrigerant pipe 120 being too low, and condensing in the exhaust pipe 23 to form excessive liquid, causing corrosion to the chimney 22, thereby ensuring the overall durability of the heating furnace 20.

[0113] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0114] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only.

[0115] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A fire extinguishing control system for extinguishing a heating furnace, characterized in that: The fire extinguishing control system comprises a fire extinguishing device, an information acquisition unit and a control device, wherein: The fire extinguishing device comprises a supply part and at least one storage part, wherein the supply part is connected to the storage part and is used to provide the fire extinguishing medium to the storage part, and the storage part is connected to the heating furnace and is used to store the fire extinguishing medium; The information acquisition unit is used to acquire the temperature information of the heating furnace and the pressure information of the storage unit in real time, and transmit them to the control device; The control device is used to determine whether a fire occurs based on the temperature information, and when a fire occurs, control the storage unit to apply a fire extinguishing medium to the heating furnace; the control device is also used to control the supply unit to provide the fire extinguishing medium to the storage unit when the pressure information is lower than a set pressure.

2. The fire extinguishing control system according to claim 1, characterized in that: The information acquisition unit includes at least one temperature sensor, and the temperature sensor is used to acquire the temperature information of the heating furnace; The storage part is connected to the heating furnace through a first gas supply passage, and a first solenoid valve is provided on the first gas supply passage. When the temperature information is greater than a set temperature, the control device controls the first solenoid valve to be turned on, and when the temperature information is less than or equal to the set temperature, the control device controls the first solenoid valve to be turned off.

3. The fire extinguishing control system according to claim 2, characterized in that: The information acquisition unit includes at least one pressure sensor for acquiring the pressure information inside the storage unit in real time; The supply unit is connected to the storage unit through a second gas transmission passage, and a second solenoid valve is provided on the second gas transmission passage, wherein when the pressure information is lower than the set pressure, the control device controls the second solenoid valve to be turned on, and when the pressure information is greater than or equal to the set pressure, the second solenoid valve is controlled to be closed.

4. The fire extinguishing control system according to claim 3, characterized in that: The storage part includes at least one gas cylinder. When the storage part includes a plurality of gas cylinders, the first gas transmission passage includes a gas main pipe and at least one gas branch pipe. The gas inlet end of the gas main pipe is connected to the supply part, and the gas outlet end is connected to the heating furnace. Each of the gas branch pipes is connected to the gas main pipe. The pressure sensor and the first solenoid valve are arranged on the gas main pipe, and the gas branch pipe is connected to the gas storage cylinder and is arranged in a one-to-one correspondence.

5. The fire extinguishing control system according to any one of claims 2 to 4, characterized in that: The heating furnace comprises a furnace and a chimney arranged at the exhaust end of the furnace; The temperature sensor comprises a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is arranged on the furnace and is used to obtain first temperature information in the furnace, and the second temperature sensor is arranged on the chimney and is used to obtain second temperature information in the chimney; When the first temperature information is greater than or equal to a first set temperature, and / or when the second temperature information is greater than or equal to a second set temperature, the control device controls the first solenoid valve to be turned on.

6. The fire extinguishing control system according to claim 5, characterized in that: The fire extinguishing control system further comprises a blocking mechanism, wherein the blocking mechanism comprises a baffle and a driving mechanism; The driving mechanism is used to drive the baffle to rotate between a first position and a second position. When the baffle is located at the first position, the baffle closes the chimney.

7. The fire extinguishing control system according to claim 6, characterized in that: The driving mechanism comprises a driving shaft, a first driving arm, a second driving arm, a third driving arm and a driver; The first driving arm, the second driving arm and the third driving arm are connected in sequence to form a connecting rod mechanism. The driver is connected to the first driving arm and is used to drive the first driving arm to rotate around a rotating shaft. The axis of the driving shaft is located in a radial cross-section of the chimney. The baffle is fixedly mounted on the driving shaft. The third driving arm is connected to the driving shaft and is used to drive the driving shaft and the baffle to rotate.

8. The fire extinguishing control system according to claim 7, characterized in that: A pointing structure is fixedly mounted on one end of the driving shaft, and the pointing structure is arranged outside the chimney and is used to mark the position state of the baffle in the chimney; When the baffle is located at the first position, the axis of the directional structure is located within the radial cross section of the chimney.

9. The fire extinguishing control system according to any one of claims 2 to 4, characterized in that: The heating furnace comprises a furnace, an exhaust pipe and a chimney, wherein the exhaust pipe is used to connect the furnace and the chimney; The temperature sensor comprises a third temperature sensor, a fourth temperature sensor and a fifth temperature sensor, wherein the third temperature sensor is arranged on the furnace and is used to obtain third temperature information in the furnace, the fourth temperature sensor is located at the air inlet end of the exhaust pipe and is used to obtain fourth temperature information entering the exhaust pipe, and the fifth temperature sensor is located at the air inlet end of the chimney and is used to obtain fifth temperature information entering the chimney; When the third temperature information is greater than or equal to the third set temperature, and / or when the fourth temperature information is greater than or equal to the fourth set temperature, and / or when the fifth temperature information is greater than or equal to the fifth set temperature, it is determined that a fire has occurred, and the control device controls the first solenoid valve to be turned on.

10. The fire extinguishing control system according to claim 9, characterized in that: The exhaust pipeline is provided with a preheating device, and the fourth temperature sensor, the preheating device and the fifth temperature sensor are arranged in sequence along the gas flow direction in the exhaust pipeline; The preheating device is used to achieve heat exchange between the exhaust pipeline and the refrigerant pipeline. At least part of the structure of the refrigerant pipeline is located in the preheating device. One end of the refrigerant pipeline is connected to the fan, and the other end is connected to the burner of the heating furnace.

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