Fire monitoring device for electrical box

Abstract

The invention relates to the technical field of fire monitoring, in particular to a fire monitoring device for an electrical box. Comprising a substrate, a drainage device composed of a gas inlet structure and a gas outlet structure which are installed on the substrate, a fire detection device provided with a temperature sensor and a gas sensor which are located on the two sides of the substrate, and a power source used for supplying power to the drainage device and the fire detection device. The air inlet structure is provided with an air inlet cavity which penetrates through the base plate and can be closed or opened. The exhaust structure is provided with a mounting area for accommodating the fire detection device, and a fan is mounted in the mounting area; the fire detection device can preset the safe temperature, when the temperature sensor detects that the temperature in the electrical box is equal to or larger than the safe temperature, the fan is controlled to be started to introduce airflow from the electrical box into the installation area, and when the gas sensor detects that gas in the installation area is abnormal, the fan and the gas inlet cavity are controlled to be closed; according to the invention, the fire behavior can be more accurately judged through detection of two indexes of temperature and gas, and the phenomenon of no report is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of fire monitoring, and in particular to a fire monitoring device for an electrical box. Background Art

[0002] Electrical is a general term for disciplines or engineering fields such as the production, transmission, distribution, use of electric energy and the manufacturing of electrical equipment. It uses electric energy, electrical equipment and electrical technology as means to create, maintain and improve confined spaces and environments.

[0003] Nowadays, electrical fires caused by insulation damage of power supply lines or electrical equipment occur frequently. Therefore, in order to effectively reduce the occurrence of electrical fires, many electrical fire monitoring devices have appeared on the market, which are roughly divided into two types:

[0004] First, a sensor (such as a temperature sensor) is installed in the electrical box (also called the distribution box) to detect the temperature change in the distribution box to determine the probability of fire;

[0005] Second, install smoke alarms around electrical boxes and use them to monitor and / or warn of fire.

[0006] However, although the above two methods can monitor the occurrence of fire to a certain extent, detecting the temperature through a temperature sensor is prone to errors. It is possible that the heat dissipation problem of the electrical box causes the high temperature inside the electrical box, and when the smoke alarm is triggered, the fire may have already started, and there is a certain lag; not only that, in order to have good heat dissipation, the electrical box needs to be equipped with heat dissipation vents. However, when a fire occurs, these heat dissipation vents happen to become favorable conditions for supplying oxygen to the source of the fire. If the heat dissipation vents are removed, the heat dissipation of the electrical box will be affected.

[0007] In summary, the above technical problems need to be solved. Summary of the Invention

[0008] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a fire monitoring device for an electrical box, aiming to solve the problems arising from the above-mentioned background technology.

[0009] The technical solution of the present invention is implemented as follows: A fire monitoring device for an electrical box, comprising:

[0010] The base plate can be hingedly mounted on the electrical box and serves as a cabinet door of the electrical box;

[0011] The drainage device is composed of at least an air intake structure and an air exhaust structure mounted on the base plate;

[0012] A fire detection device is mounted on the substrate and has at least a temperature sensor and a gas sensor located on both sides of the substrate;

[0013] A power supply for supplying power to the drainage device and / or the fire detection device;

[0014] The air intake structure is at least constructed with an air intake cavity that penetrates the substrate and can be closed or opened; the exhaust structure is at least constructed with an installation area for accommodating a fire detection device, and the installation area is at least equipped with a fan;

[0015] The fire detection device can preset a safe temperature. When the temperature sensor detects that the temperature inside the electrical box is equal to or greater than the safe temperature, the fan is controlled to start and air is introduced from the electrical box into the installation area. When the gas sensor detects abnormal gas in the installation area, the fan is controlled to shut down and the air intake cavity is closed.

[0016] Preferably, the fire detection device includes:

[0017] A machine box is arranged in the installation area and has an air inlet and an exhaust port;

[0018] a processing module, mounted in the chassis, and comprising a mainboard, a processor mounted on the mainboard, and a gas sensor;

[0019] A temperature sensor is connected to the mainboard and is located on a side of the baseboard away from the chassis;

[0020] Alarm, mounted on the base plate and / or drainage device.

[0021] Preferably, the air intake structure includes:

[0022] Inlet gas, mounted on the base plate;

[0023] An air inlet cavity is formed on the air inlet body, with one end of the air inlet cavity being open and the other end of the air inlet cavity extending upward and penetrating the substrate;

[0024] A closing plate, movably arranged in the air inlet cavity;

[0025] The electromagnetic structure is installed on the air intake chamber and is used to control the closing plate to open or close the air intake chamber.

[0026] Preferably, the electromagnetic structure includes:

[0027] a housing, mounted on the air inlet;

[0028] A movable shaft is slidably arranged in the shell, and one end of the movable shaft penetrates the air inlet cavity and is connected to the closing plate;

[0029] an electromagnet, mounted in the housing and capable of being powered by a power supply;

[0030] a spring connected between the movable shaft and the housing;

[0031] When the electromagnet is energized, the air inlet cavity is opened by controlling the closing plate through the movable shaft; when the electromagnet is de-energized, the air inlet cavity is closed by controlling the closing plate through the spring.

[0032] Preferably, the exhaust structure includes:

[0033] A drainage box is installed on the base plate and has the installation area formed therein;

[0034] The exhaust port is located on the drainage box and is equipped with a fan;

[0035] The air inlet is provided on the base plate and is connected to the electrical box and the installation area;

[0036] The fan can be started and stopped by a fire detection device.

[0037] By adopting the above technical solutions:

[0038] The temperature sensor and gas sensor of the fire detection device of the present invention are arranged on both sides of the substrate. When in use, the substrate is installed on the electrical box and serves as the cabinet door of the electrical box. After installation, the temperature sensor is located inside the electrical box and the gas sensor is located outside the electrical box.

[0039] When the temperature sensor detects a high temperature inside the electrical box, the fire detection device controls the fan to start and discharge the gas in the electrical box to be detected by the gas sensor. When the gas sensor detects a gas abnormality, it immediately determines the risk of fire, shuts down the fan and the air intake cavity, and sounds an alarm. Isolating the gas outside the electrical box from entering the electrical box can suppress the fire to a certain extent. If the gas sensor does not detect a gas abnormality, the fan continues to start to dissipate heat from the electrical box.

[0040] The fire monitoring device of the present invention effectively avoids false alarms caused by high temperatures that are not fire conditions.

[0041] Preferably, there are two air outlets and two air inlets, which are respectively arranged on both sides of the machine box, and a fan is installed at each air outlet;

[0042] An airflow guiding area is formed between the machine box and the guide box, and an airflow guiding structure is installed in the airflow guiding area;

[0043] The airflow guiding structure comprises at least a plurality of guide plates rotatably connected to the installation area and a drive structure mounted on the guide box and used to control the switching position of the guide plates; the guide plates can control the installation area to form at least a first airflow branch and a second airflow branch;

[0044] In the first airflow branch, the air enters from the air inlet, enters the chassis through the air inlet, and is discharged from the exhaust port, and finally discharged from the exhaust port;

[0045] In the second air flow branch, the air flows in from the air inlet and is discharged from the air outlet through the air flow guiding area.

[0046] Preferably, the guide plate is composed of a first guide plate located below the machine box and a second guide plate located above the machine box;

[0047] The first guide plate and the second guide plate are rotatably connected to the installation area via a rotating shaft;

[0048] The first guide plate and the second guide plate each include a plate body rotatably connected to the installation area via a rotating shaft and a plurality of fixing plates fixedly connected to the installation area, one end of the fixing plate being able to contact the plate body.

[0049] Preferably, the driving structure includes:

[0050] A plurality of pulleys are rotatably connected to the drainage box and are connected to the first guide plate or the second guide plate;

[0051] Synchronous belt, transmission connection between each pulley;

[0052] Drive the motor to control the rotation of any pulley.

[0053] Preferably, the drainage box is further rotatably connected to a traction wheel.

[0054] By adopting the above technical solutions:

[0055] The present invention further provides an airflow guiding structure in the drainage box, and the airflow guiding structure distinguishes between a heat dissipation mode and a gas detection mode.

[0056] The airflow guiding structure of the present invention can be implemented to introduce gas into the machine box during detection; while during heat dissipation, the gas enters the drainage box and is directly discharged without entering the machine box. This reduces the frequency of gas entering the machine box under normal conditions, making it difficult for impurities to remain in the machine box, thereby ensuring the use of the fire detection device.

[0057] Secondly, the gas guiding structure of the present invention can also change the air flow path in the electrical box. Through the air flow guiding structure, the electrical box can enter the drainage box from different air inlets. When different air inlets are used, the gas flow path in the electrical box changes to reduce air blind spots. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0059] Figure 1 This is a structural diagram of a specific embodiment 1 of the present invention installed on an electrical box;

[0060] Figure 2 This is a schematic structural diagram of a specific embodiment 1 of the present invention;

[0061] Figure 3 for Figure 2 AA section view in;

[0062] Figure 4 for Figure 2 BB cross-sectional view in;

[0063] Figure 5 This is a schematic diagram of the principle of a fire detection device in a specific embodiment 1 of the present invention;

[0064] Figure 6 This is a schematic structural diagram of a specific embodiment 2 of the present invention;

[0065] Figure 7 This is a structural diagram of a specific embodiment 2 of the present invention without the drainage box portion of the housing;

[0066] Figure 8 for Figure 7 The CC section view in the figure;

[0067] Figure 9 for Figure 8 Another state diagram of ;

[0068] Figure 10 This is a schematic diagram of the principle of the fire detection device in specific embodiment 2 of the present invention. DETAILED DESCRIPTION

[0069] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0070] Example 1:

[0071] like Figure 1-Figure 5 As shown, the present invention discloses a fire monitoring device for an electrical box, comprising:

[0072] The base plate 10 can be hingedly mounted on the electrical box 11 and serves as a cabinet door of the electrical box 11. The electrical box 11 can be supported by a support frame 12. In this embodiment, the base plate 10 is connected to the electrical box 11 via three hinge structures 13 (e.g., hinges).

[0073] The drainage device is composed of at least an air intake structure 20 and an air exhaust structure 21 mounted on the substrate 10;

[0074] The fire detection device is mounted on the substrate 10 and comprises at least a temperature sensor 30 and a gas sensor 31 located on both sides of the substrate 10;

[0075] Power supply 4, used to supply power to the drainage device and the fire detection device, and is provided on the drainage device;

[0076] The air intake structure 20 is at least constructed with an air intake cavity 200 that penetrates the substrate 10 and can be closed or opened; the exhaust structure 21 is at least constructed with an installation area for accommodating a fire detection device, and the installation area is at least equipped with a fan 210;

[0077] The fire detection device can preset a safe temperature. When the temperature sensor 30 detects that the temperature inside the electrical box 11 is equal to or greater than the safe temperature, the fan 210 is controlled to start and introduce air flow from the electrical box 11 into the installation area. When the gas sensor 31 detects that the gas in the installation area is abnormal, the fan 210 is controlled to shut down and close the air intake cavity 200.

[0078] In this embodiment: the fire detection device includes:

[0079] The housing 300 is located in the installation area and has an air inlet 301 and an air outlet 302;

[0080] The processing module is installed in the housing 300 and comprises a mainboard 302, a processor installed on the mainboard 302, and a gas sensor 31;

[0081] The temperature sensor 30 is connected to the mainboard 302 and is located on a side of the base plate 10 away from the housing 300;

[0082] The alarm 33 is mounted on the substrate 10 .

[0083] In this embodiment, the air intake structure 20 includes:

[0084] The gas inlet 201 is mounted on the substrate 10;

[0085] The air inlet cavity 200 is formed on the air inlet body 201, and one end of the air inlet cavity is open, and the other end of the air inlet cavity extends and passes through the substrate;

[0086] A closing plate 202 is movably disposed in the air inlet cavity 200;

[0087] The electromagnetic structure is installed on the air inlet cavity 201 and is used to control the closing plate 202 to open or close the air inlet cavity 201 .

[0088] In this embodiment, a filter screen 203 is provided in the air inlet cavity 200 .

[0089] In this embodiment: the electromagnetic structure includes:

[0090] The housing 40 is mounted on the air inlet 210;

[0091] The movable shaft 41 is slidably disposed in the housing 40 , and one end of the movable shaft 41 penetrates the air inlet cavity 200 and is connected to the closing plate 202 ;

[0092] an electromagnet 42 mounted within the housing 40 and capable of being powered by a power source;

[0093] A spring 43 is connected between the movable shaft 41 and the housing 40;

[0094] When the electromagnet 42 is energized, the movable shaft 41 controls the closing plate 202 to open the air inlet cavity 200 ; when the electromagnet 42 is de-energized, the spring 43 controls the closing plate 202 to close the air inlet cavity 200 .

[0095] In this embodiment, the exhaust structure 21 includes:

[0096] The drainage box 211 is installed on the base plate 10 and has the installation area formed therein;

[0097] The exhaust port is provided on the drainage box 211 and is equipped with a fan 210;

[0098] The air inlet 212 is provided on the base plate 10 and is connected to the electrical box 11 and the installation area;

[0099] The fan 210 can be started and stopped by the fire detection device.

[0100] refer to Figure 1-Figure 5 The principle of this embodiment is: when the temperature in the electrical box rises, the temperature sensor feeds back the detected temperature to the processor, the processor controls the fan to start, and guides the hot air in the electrical box into the drainage box from the air inlet, and the hot air enters the machine box from the air inlet. The gas sensor in the machine box (such as: smoke sensor, organic gas sensor and PM2.5 sensor, etc.) detects abnormalities in the hot air through the gas sensor. If there is an abnormality, it is judged that there may be a fire in the electrical box. The processor immediately controls the fan to stop, controls the electromagnet to cut off the power, and then closes the air intake cavity, and sends a command to the alarm at the same time, and the alarm immediately sends an alarm signal.

[0101] When the gas sensor does not detect any abnormality in the hot air, the fan continues to start and dissipate heat from the electrical box.

[0102] Example 2 is different from Example 1 in that:

[0103] like Figure 6-Figure 9As shown, in this embodiment: there are two air outlets and two air inlets 212, which are respectively provided on both sides of the housing 300, and a fan 210 is installed at each air outlet;

[0104] An airflow guiding area 50 is formed between the machine box 300 and the guide box 211, and an airflow guiding structure is installed in the airflow guiding area;

[0105] The airflow guiding structure comprises at least a plurality of guide plates rotatably connected to the installation area and a driving structure mounted on the guide box 211 and used to control the switching position of the guide plates; the guide plates can control the installation area to form a first airflow branch and a second airflow branch;

[0106] In the first airflow branch, the air enters from the air inlet 212, enters the housing 300 through the air inlet 301, and is discharged from the exhaust port 302, and finally discharged from the exhaust port;

[0107] In the second air flow branch, the air flows in from the air inlet 212 and is discharged from the air outlet through the air flow guiding area 50 .

[0108] In this embodiment: the guide plate is composed of a first guide plate 61 located below the machine box 300 and a second guide plate 62 located above the machine box 300;

[0109] The first guide plate 61 and the second guide plate 62 are rotatably connected to the installation area via a rotating shaft 63;

[0110] The first guide plate 61 and the second guide plate 62 each include a plate body 64 rotatably connected to the installation area via a rotating shaft 63 and a plurality of fixing plates 65 fixedly connected to the installation area, one end of the fixing plate 65 being able to contact the plate body 64 .

[0111] In this embodiment: the driving structure includes:

[0112] A plurality of pulleys 70 are rotatably connected to the drainage box 211 and connected to the first guide plate 61 or the second guide plate;

[0113] A synchronous belt 71 is connected between the pulleys 70;

[0114] The driving motor 72 controls the rotation of any pulley 70 .

[0115] In this embodiment, the drainage box 211 is also rotatably connected to a traction pulley 73, so that the wrap angle between the pulley and the belt is more reasonable and the transmission is stable.

[0116] In this embodiment, each plate body is correspondingly provided with three fixed plates, that is, the plate body can contact each fixed plate separately under the control of the driving structure.

[0117] refer to Figure 6-Figure 9 When in use, this embodiment can control the direction of the gas in the drainage box according to the airflow guiding structure, such as Figure 8 As shown (in the first airflow branch state), the hot air in the electrical box enters from the air inlet, enters the machine box through the air inlet on the machine box, and is then discharged from the exhaust port;

[0118] In the second airflow branch state (such as Figure 9 As shown), the hot air in the electrical box enters from the air inlet and is directly discharged through the air outlet. This state is the heat dissipation mode for the electrical box;

[0119] In this embodiment, the direction of the airflow can be controlled by the driving structure to detect the airflow or to dissipate heat for the electrical box.

[0120] It is worth mentioning that: this embodiment has two air inlets, therefore, when the plate rotates, at least two first airflow branches can be formed, that is: the electrical box, the air inlet on the left, the air inlet, the exhaust port and the exhaust port on the right form the first first airflow branch; the electrical box, the air inlet on the right, the air inlet exhaust port and the exhaust port on the left form the second first airflow branch; when switching different first airflow branches, the air flow from the air inlet cavity into the electrical box can change the flow path to reduce the dead corners of air induction in the electrical box, so as to better sense and detect the gas in the electrical box.

[0121] When the present invention detects an abnormal temperature in the electrical box, it can first switch to the first air flow branch to introduce air flow for detection, and then switch to the second first air flow branch to introduce air flow for detection. If an abnormality is found in any of the two detections, the fan is immediately paused and the air intake cavity is closed; if there is no abnormality on both sides, it switches to the second air flow branch for heat dissipation.

[0122] In addition, the present invention can simultaneously control the synchronous rotation of each plate through the driving structure, so as to achieve better switching between the first air flow branch and the second air flow branch.

[0123] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fire monitoring device for an electrical box, characterized in that: include: A base plate (10) can be hingedly mounted on the electrical box (11) and serves as a door of the electrical box (11); A flow guiding device is composed of at least an air intake structure (20) and an air exhaust structure (21) mounted on a substrate (10); A fire detection device is mounted on a substrate (10) and comprises at least a temperature sensor (30) and a gas sensor (31) located on both sides of the substrate (10); a power supply (4) for supplying power to the drainage device and / or the fire detection device; The air intake structure (20) is at least constructed with an air intake cavity (200) that penetrates the base plate (10) and can be closed or opened; the exhaust structure (21) is at least constructed with an installation area for accommodating a fire detection device, and the installation area is at least installed with a fan (210); The fire detection device can preset a safety temperature. When the temperature sensor (30) detects that the temperature in the electrical box (11) is equal to or greater than the safety temperature, the fan (210) is controlled to start and introduce airflow from the electrical box (11) into the installation area. When the gas sensor (31) detects that the gas in the installation area is abnormal, the fan (210) is controlled to shut down and seal the air inlet cavity (200).

2. The fire monitoring device for an electrical box according to claim 1, characterized in that: The fire detection device comprises: A machine box (300) is arranged in the installation area and has an air inlet (301) and an air outlet (302); A processing module is installed in the housing (300) and comprises a mainboard (302), a processor installed on the mainboard (302), and a gas sensor (31); A temperature sensor (30) is connected to the mainboard (302) and is located on a side of the baseboard (10) away from the housing (300); An alarm (33) is mounted on the base plate (10) and / or the drainage device.

3. The fire monitoring device for an electrical box according to claim 2, characterized in that: The air intake structure (20) comprises: A gas inlet (201) is mounted on the substrate (10); An air inlet cavity (200) is formed on the air inlet body (201), with one end of the air inlet cavity being open and the other end of the air inlet cavity extending upward and penetrating the substrate; A closing plate (202) movably disposed in the air inlet cavity (200); The electromagnetic structure is installed on the air inlet (201) and is used to control the closing plate (202) to open or close the air inlet cavity (201).

4. The fire monitoring device for an electrical box according to claim 3, characterized in that: The electromagnetic structure comprises: a housing (40) mounted on the gas inlet (210); A movable shaft (41) is slidably disposed in the housing (40), with one end penetrating the air inlet cavity (200) and connected to the closing plate (202); an electromagnet (42) mounted in the housing (40) and capable of being powered by a power source; A spring (43) is connected between the movable shaft (41) and the housing (40); When the electromagnet (42) is energized, the closing plate (202) is controlled by the movable shaft (41) to open the air inlet chamber (200); when the electromagnet (42) is de-energized, the closing plate (202) is controlled by the spring (43) to close the air inlet chamber (200).

5. A fire monitoring device for an electrical box according to any one of claims 2 to 4, characterized in that: The exhaust structure (21) comprises: A drainage box (211) is installed on the base plate (10) and has the installation area formed therein; An air outlet is provided on the drainage box (211) and is equipped with a fan (210); An air inlet (212) is provided on the base plate (10) and is connected to the electrical box (11) and the installation area; The fan (210) can be started and stopped by a fire detection device.

6. The fire monitoring device for an electrical box according to claim 5, characterized in that: There are two air outlets and two air inlets (212), which are respectively arranged on both sides of the machine box (300), and a fan (210) is installed at each air outlet; An airflow guiding area (50) is formed between the machine box (300) and the guide box (211), and an airflow guiding structure is installed in the airflow guiding area; The airflow guiding structure comprises at least a plurality of guide plates rotatably connected to the installation area and a driving structure installed on the guide box (211) and used to control the guide plates to switch positions; the guide plates can control the installation area to form at least a first airflow branch and a second airflow branch; In the first airflow branch, the airflow enters from the air inlet (212), enters the housing (300) through the air inlet (301), and is discharged from the air outlet (302), and finally discharged from the air outlet; In the second air flow branch, the air flow enters from the air inlet (212) and is discharged from the air outlet through the air flow guiding area.

7. The fire monitoring device for an electrical box according to claim 6, characterized in that: The guide plate is composed of a first guide plate (61) located below the machine box (300) and a second guide plate (62) located above the machine box (300); The first guide plate (61) and the second guide plate (62) are rotatably connected to the installation area via a rotating shaft (63); The first guide plate (61) and the second guide plate (62) each include a plate body (64) rotatably connected to the installation area via a rotating shaft (63) and a plurality of fixed plates (65) fixedly connected to the installation area, wherein one end of the fixed plate (65) can contact the plate body (64).

8. A fire monitoring device for an electrical box according to claim 6 or 7, characterized in that: The driving structure includes: A plurality of pulleys (70) are rotatably connected to the drainage box (211) and are connected to the first guide plate (61) or the second guide plate (62); A synchronous belt (71) is connected between the pulleys (70); The driving motor (72) controls the rotation of any pulley (70).

9. The fire monitoring device for an electrical box according to claim 8, characterized in that: The drainage box (211) is also rotatably connected to a traction wheel (73).

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