Anti-burnout junction box applied to photovoltaic power generation system

Abstract

The utility model discloses an anti-burnout junction box applied to a photovoltaic power generation system, the anti-burnout junction box comprises an anti-burnout junction box body, the anti-burnout junction box body comprises a box body, a box cover fixed on the top of the box body and two connectors installed on one side of the box body, and the box cover is provided with a self-conversion heat dissipation self-extinguishing mechanism; and the self-conversion heat dissipation and self-extinguishing mechanism comprises a fixed cover fixedly connected to the top of the box cover, a rectangular hole is formed in the top of the box cover, and a carbon dioxide extinguishing medium storage box is fixedly connected to the inner wall of the top of the fixed cover. By arranging a series of structures, the internal part of the box body can be automatically cooled at high temperature, the risk that elements such as a circuit board in the box body are burnt out at high temperature is reduced, the use safety is improved, and the box body can be automatically and timely extinguished and send alarm information to remind terminal personnel when the internal part of the box body is on fire, so that the burning risk is reduced; and terminal personnel can conveniently know and process in time, so that the use safety is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-burning junction boxes, in particular to an anti-burning junction box applied to a photovoltaic power generation system. Background Art

[0002] The photovoltaic junction box is a connection device used to conduct current in a solar cell module and is a very important component of a solar cell module. Since the current transmission module inside the photovoltaic junction box maintains the transmission current when in use, ensuring the safe use of the photovoltaic junction box is an extremely important item in the photovoltaic power generation system.

[0003] In this regard, after searching, publication number CN117118349B discloses an anti-burn junction box in a photovoltaic power generation system, which is provided with a box body, a plug connector, a connector, a box cover, a current transmission unit, a telescopic rod, and a first elastic component. The plug connector and the connector are both located in the box body, so that the connection between the two will not be exposed to the outside of the box body, which has the effect of sealing and protecting it. It is not easy for the connection to loosen due to shaking, and the probability of rust is reduced. When heat or burning occurs at the connection between the connector and the plug connector inside the box body, the temperature control limit device uses the increased temperature to control the limit column to separate from the limit groove, and the first elastic component automatically controls the support ring and the plug connector to disconnect from the connector. The disconnection method is not controlled by the circuit, and the safety and stability of the power-off operation are better, making its protection function more ideal.

[0004] The above technology discloses a burn-proof junction box in a photovoltaic power generation system. When heat or combustion occurs at the connection between the connector and the plug connector inside the box body, the connection can be disconnected so that it is not controlled by the circuit, and it is safe and stable. However, there are still the following shortcomings when in use: 1. There are many components such as circuit boards inside the box body of the junction box, which will generate a lot of heat when in use. It cannot automatically cool down when the temperature inside the box body is high, and it cannot automatically extinguish the fire when a fire occurs inside the box body. The safety of use is still not ideal. In view of this, we have improved it on this basis and proposed an burn-proof junction box for photovoltaic power generation systems. Utility Model Content

[0005] The purpose of the utility model is to provide a burn-out prevention junction box applied to a photovoltaic power generation system, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-burn junction box applied to a photovoltaic power generation system, comprising an anti-burn junction box body, the anti-burn junction box body comprising a box body, a box cover fixed on the top of the box body and two connectors installed on one side of the box body, the box cover is installed with a self-conversion heat dissipation and self-extinguishing mechanism;

[0007] The self-conversion heat dissipation and self-extinguishing mechanism comprises a fixed cover fixedly connected to the top of the box cover, a rectangular hole is opened on the top of the box cover, a carbon dioxide fire extinguishing medium storage box is fixedly connected to the top inner wall of the fixed cover, a PLC controller and an air pump are fixedly installed on the left inner wall of the fixed cover, an air supply direction switching component is connected and fixed between the air outlet of the air pump and the left side of the carbon dioxide fire extinguishing medium storage box, a scattering and blowing component located in the rectangular hole is connected and fixed to the bottom of the scattering and blowing component, the temperature sensor and the smoke sensor are all electrically connected to the PLC controller, the temperature sensor and the smoke sensor are used to detect the temperature and smoke concentration in the box body respectively, and transmit the temperature value and the smoke concentration value to the PLC controller respectively, the temperature value and the smoke concentration value received by the PLC controller are used to control the air pump to automatically start when the temperature value and the smoke concentration value exceed the preset value, and the air supply direction switching component is controlled to automatically switch the air supply direction according to the two numerical conditions, and the scattering and blowing component is used to blow air to cool the inside of the box body when the air supply direction is downward;

[0008] The bottom of the carbon dioxide fire extinguishing medium storage box is connected and fixed with a fire extinguishing medium spraying assembly electrically connected to the PLC controller. The fire extinguishing medium spraying assembly is used to be controlled by the PLC controller to automatically start spraying and extinguishing the fire inside the box when the gas supply direction is right.

[0009] Preferably, the air supply direction switching assembly includes a T-shaped tube connected and fixed to the air outlet of the air pump, a first solenoid valve is connected and fixed to the top left side of the carbon dioxide fire extinguishing medium storage box, the left side of the first solenoid valve is connected and fixed to the right end of the T-shaped tube, the bottom end of the T-shaped tube is connected and fixed to the second solenoid valve, the bottom of the second solenoid valve is connected and fixed to a conduit, the bottom end of the conduit extends into the rectangular hole, and the first solenoid valve and the second solenoid valve are both electrically connected to the PLC controller.

[0010] Preferably, the diffusion and blowing assembly includes a hollow disk arranged in a rectangular hole, the top left side of the hollow disk is connected and fixed to the bottom end of the conduit, the temperature sensor and the smoke sensor are fixedly connected to the bottom of the hollow disk, and the outside and bottom of the hollow disk are connected and fixed with multiple blowing heads, and the multiple blowing heads located on the outside of the hollow disk are arranged at an angle.

[0011] Preferably, the fire extinguishing medium spray assembly includes a third solenoid valve connected and fixed at the bottom of a carbon dioxide fire extinguishing medium storage box, the bottom of the third solenoid valve is connected and fixed with a spray box, the outer bottom and the bottom of the spray box are connected and fixed with multiple spray heads, the multiple spray heads located on the outside of the spray box are all arranged to be tilted downward, the hollow disk is fixedly mounted on the spray box, the hollow disk is located above the multiple spray heads, and the third solenoid valve is electrically connected to the PLC controller.

[0012] Preferably, a avoidance hole is opened on the left inner wall of the fixed cover, and the air inlet of the air pump extends into the avoidance hole and is fixedly connected to the filter cover.

[0013] Preferably, a plurality of exhaust holes inclined downward are provided on the left inner wall of the box body, and a wireless sending module for sending alarm information is built into the PLC controller. The wireless sending module is used to send alarm information to the system terminal when the smoke concentration value received by the PLC controller exceeds a preset value, so as to facilitate terminal personnel to be informed and handle the matter in time.

[0014] Preferably, an injection pipe connected to the interior of the carbon dioxide fire extinguishing medium storage box is embedded and fixed on the top right side of the fixed cover, and a pipe cover is threadedly sleeved on the outer top end of the injection pipe.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. This anti-burning junction box used in photovoltaic power generation systems can detect the internal temperature of the box in real time through the cooperation of the PLC controller, air pump, air supply direction switching component and air blowing component, and automatically dissipate heat and cool the inside of the box when the internal temperature is high, thereby reducing the risk of high-temperature burning of components such as circuit boards inside the box and improving safety in use;

[0017] 2. This anti-burn junction box used in photovoltaic power generation systems, through the cooperation of the set PLC controller, air pump, air supply direction switching component, carbon dioxide fire extinguishing medium storage box, fire extinguishing medium spraying component and wireless transmission module, can automatically switch the air supply direction to assist the delivery and spraying of carbon dioxide fire extinguishing medium when a fire occurs inside the box and smoke is generated, and send an alarm message to remind terminal personnel, so as to achieve the effect of automatic and timely fire extinguishing and alarm reminder when a fire occurs inside the box, reduce the risk of burning, and facilitate terminal personnel to know and deal with it in time, further improving the safety of use.

[0018] The utility model is provided with a series of structures, which is convenient for automatically dissipating heat and cooling the inside of the box body at high temperature, reducing the risk of high-temperature burning of components such as circuit boards inside the box body, improving safety in use, and is convenient for automatically and promptly extinguishing the fire when a fire occurs inside the box body and sending an alarm message to remind terminal personnel, reducing the risk of burning, and making it convenient for terminal personnel to be informed and handle in time, further improving safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of an anti-burnout junction box applied to a photovoltaic power generation system proposed by the utility model;

[0020] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of ;

[0021] Figure 3For the utility model Figure 2 A schematic diagram of the enlarged structure of part A in the figure.

[0022] In the figure: 100, box body; 101, box cover; 102, connector; 1, exhaust hole; 2, fixed cover; 3, carbon dioxide fire extinguishing medium storage box; 4, PLC controller; 5, third solenoid valve; 6, spray box; 7, spray head; 8, hollow disk; 9, blowing head; 10, temperature sensor; 11, smoke sensor; 12, air pump; 13, T-tube; 14, first solenoid valve; 15, second solenoid valve; 16, conduit. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figures 1 to 3 As shown, the present embodiment proposes an anti-burn junction box for a photovoltaic power generation system, comprising an anti-burn junction box body, the anti-burn junction box body comprising a box body 100, a box cover 101 fixed to the top of the box body 100 and two connectors 102 installed on one side of the box body 100, a plurality of downwardly inclined exhaust holes 1 are provided on the left inner wall of the box body 100, the exhaust holes 1 are used to discharge the gas in the box body 100 to the outside, and a self-conversion heat dissipation and self-extinguishing mechanism is installed on the box cover 101;

[0025] The self-conversion heat dissipation and self-extinguishing mechanism includes a fixed cover 2 fixedly connected to the top of the box cover 101, a rectangular hole is opened on the top of the box cover 101, a carbon dioxide fire extinguishing medium storage box 3 is fixedly connected to the top inner wall of the fixed cover 2, an injection pipe connected to the inside of the carbon dioxide fire extinguishing medium storage box 3 is embedded and fixed on the top right side of the fixed cover 2, a pipe cover is provided on the outer top end of the injection pipe, and the provided injection pipe is used for personnel to inject carbon dioxide fire extinguishing medium into the carbon dioxide fire extinguishing medium storage box 3, a PLC controller 4 and an air pump 12 are fixedly installed on the left inner wall of the fixed cover 2, an avoidance hole is opened on the left inner wall of the fixed cover 2, the air inlet of the air pump 12 extends into the avoidance hole and is fixedly connected with a filter cover, the filter cover is used to intercept external impurities at the air inlet of the air pump 12, an air outlet of the air pump 12 is connected and fixed with an air supply direction switching component between the air outlet and the left side of the carbon dioxide fire extinguishing medium storage box 3, and the bottom end of the air supply direction switching component is connected and fixed with a filter cover located in the rectangular hole The scattering and blowing component has a temperature sensor 10 and a smoke sensor 11 fixedly connected to the bottom of the scattering and blowing component. The temperature sensor 10, the smoke sensor 11, the air supply direction switching component and the air pump 12 are all electrically connected to the PLC controller 4. The temperature sensor 10 and the smoke sensor 11 are used to detect the temperature and smoke concentration in the box body 100 respectively, and transmit the temperature value and the smoke concentration value to the PLC controller 4 respectively. When the temperature value and the smoke concentration value received by the PLC controller 4 exceed the preset value, the air pump 12 is controlled to automatically start, and the air supply direction switching component is controlled to automatically switch the air supply direction according to the two numerical conditions. The scattering and blowing component is used to blow air to cool down the inside of the box body 100 when the air supply direction is downward; the bottom of the carbon dioxide fire extinguishing medium storage box 3 is connected and fixed with a fire extinguishing medium spraying component electrically connected to the PLC controller 4. The fire extinguishing medium spraying component is used to be controlled by the PLC controller 4 to automatically start and spray the inside of the box body 100 to extinguish the fire when the air supply direction is to the right;

[0026] The PLC controller 4 has a built-in wireless transmission module for sending alarm information. The wireless transmission module is used to send alarm information to the system terminal when the smoke concentration value received by the PLC controller 4 exceeds the preset value, so that the terminal personnel can be informed and handled in time.

[0027] Specifically, the gas supply direction switching component includes a T-shaped tube 13 connected and fixed to the gas outlet of the air pump 12, a first solenoid valve 14 is connected and fixed to the top of the left side of the carbon dioxide fire extinguishing medium storage box 3, the left side of the first solenoid valve 14 is connected and fixed to the right end of the T-shaped tube 13, the bottom end of the T-shaped tube 13 is connected and fixed to the second solenoid valve 15, the bottom of the second solenoid valve 15 is connected and fixed to the conduit 16, the bottom end of the conduit 16 extends into the rectangular hole, and the first solenoid valve 14 and the second solenoid valve 15 are both electrically connected to the PLC controller 4; the T-shaped tube 13, the first solenoid valve 14, the second solenoid valve 15 and the conduit 16 are arranged to cooperate, when the temperature value received by the PLC controller 4 exceeds the preset value, the second solenoid valve 15 is controlled to open, so that the gas is supplied downward into the conduit 16, when the smoke concentration value received by the PLC controller 4 exceeds the preset value, the second solenoid valve 15 is controlled to close, and the first solenoid valve 14 is controlled to open, so as to switch to the right gas supply to increase the pressure in the carbon dioxide fire extinguishing medium storage box 3, so as to facilitate the automatic switching of the gas supply direction according to the two numerical conditions.

[0028] Furthermore, the blowing assembly includes a hollow disk 8 arranged in a rectangular hole, the top left side of the hollow disk 8 is connected and fixed to the bottom end of the conduit 16, the temperature sensor 10 and the smoke sensor 11 are fixedly connected to the bottom of the hollow disk 8, and the outer side and the bottom of the hollow disk 8 are connected and fixed with multiple blowing heads 9, and the multiple blowing heads 9 located on the outer side of the hollow disk 8 are inclined; the hollow disk 8 and the blowing heads 9 are arranged in coordination, and when the gas is supplied downward into the conduit 16, it will pass into the hollow disk 8, and then be blown into the box body 100 through the multiple blowing heads 9 to perform blowing and heat dissipation work, thereby utilizing heat dissipation to reduce the risk of high-temperature burning.

[0029] Furthermore, the fire extinguishing medium spraying assembly includes a third solenoid valve 5 connected and fixed to the bottom of the carbon dioxide fire extinguishing medium storage box 3, the bottom of the third solenoid valve 5 is connected and fixed with a spray box 6, the outer bottom and the bottom of the spray box 6 are connected and fixed with multiple spray heads 7, the multiple spray heads 7 located on the outer side of the spray box 6 are all tilted downward, and the hollow disk 8 is fixedly sleeved on the spray box 6, wherein the top and bottom of the hollow disk 8 are both provided with a set hole fixedly connected to the outer side of the spray box 6, and the hollow disk 8 is fixedly sleeved on the spray box 6 through two set holes The hollow disk 8 is located above the multiple spray heads 7, and the third solenoid valve 5 is electrically connected to the PLC controller 4; the spray box 6, the third solenoid valve 5 and the spray head 7 are coordinated. When the smoke concentration value received by the PLC controller 4 exceeds the preset value, the third solenoid valve 5 is also controlled to open. The pressurized carbon dioxide fire extinguishing medium in the carbon dioxide fire extinguishing medium storage box 3 is supplied to the spray box 6 through the third solenoid valve 5, and then sprayed into the box body 100 through the multiple spray heads 7 to extinguish the fire, which has the effect of automatically and timely extinguishing the fire when it occurs, reducing the risk of burning.

[0030] The method of using the present embodiment is as follows: when the anti-burning junction box applied to the photovoltaic power generation system is used, the temperature sensor 10 and the smoke sensor 11 respectively detect the temperature and smoke concentration in the box body 100 in real time, and transmit the temperature value and smoke concentration value to the PLC controller 4 respectively. When the temperature value exceeds the preset value, the PLC controller 4 controls the air pump 12 and the second solenoid valve 15 to open, and the air pump 12 supplies air to the T-tube 13. The gas is downwardly supplied to the hollow disk 8 through the second solenoid valve 15 and the conduit 16 in turn, and then blown into the box body 100 through multiple blowing heads 9 for blowing and heat dissipation. The hot air is discharged outward through the exhaust hole 1 for blowing and cooling. When the temperature drops to the preset minimum value, the PLC controller 4 controls the air pump 12 and the second solenoid valve 15 to close. By automatically blowing and cooling when the temperature inside the box body 100 is high, it is convenient to automatically dissipate heat and cool the inside of the box body 100 at high temperature, reduce the risk of high-temperature burning of components such as circuit boards inside the box body 100, and improve safety in use;

[0031] When the smoke concentration value received by the PLC controller 4 exceeds the preset value, the PLC controller 4 controls the air pump 12, the first solenoid valve 14 and the third solenoid valve 5 to open, and sends an alarm message to the system terminal through the wireless sending module. At this time, when the air pump 12 supplies gas to the T-tube 13, the gas is converted to the right through the first solenoid valve 14 to enter the carbon dioxide fire extinguishing medium storage box 3 for pressurization. The carbon dioxide fire extinguishing medium is downwardly supplied to the spray box 6 through the third solenoid valve 5, and then sprayed into the box body 100 through multiple spray heads 7 for fire extinguishing. This makes it easy to automatically switch the gas supply direction to assist in the delivery and spraying of the carbon dioxide fire extinguishing medium when a fire occurs and smoke is generated, and send an alarm message to remind the terminal personnel, so as to achieve the effect of automatic and timely fire extinguishing and alarm reminder when a fire occurs inside the box body 100, reduce the risk of burning, and facilitate terminal personnel to know and deal with it in time, further improving the safety of use.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A burn-proof junction box for use in a photovoltaic power generation system, comprising a burn-proof junction box body, the burn-proof junction box body comprising a box body (100), a box cover (101) fixed to the top of the box body (100), and two connectors (102) installed on one side of the box body (100), characterized in that: The box cover (101) is provided with a self-converting heat dissipation and self-extinguishing mechanism; The self-conversion heat dissipation and self-extinguishing mechanism comprises a fixed cover (2) fixedly connected to the top of a box cover (101), a rectangular hole is opened on the top of the box cover (101), a carbon dioxide fire extinguishing medium storage box (3) is fixedly connected to the inner wall of the top of the fixed cover (2), a PLC controller (4) and an air pump (12) are fixedly installed on the left inner wall of the fixed cover (2), an air supply direction switching component is connected and fixed between the air outlet of the air pump (12) and the left side of the carbon dioxide fire extinguishing medium storage box (3), the bottom end of the air supply direction switching component is connected and fixed with a blowing component located in the rectangular hole, the bottom of the blowing component is fixedly connected with a temperature sensor (10) and a smoke sensor (11), and the temperature sensor (10), the smoke sensor (11), the air supply direction switching component and the air pump (12) are all electrically connected to the PLC controller (4); The bottom of the carbon dioxide fire extinguishing medium storage box (3) is connected and fixed with a fire extinguishing medium spraying assembly which is electrically connected to the PLC controller (4).

2. The anti-burnout junction box used in a photovoltaic power generation system according to claim 1, characterized in that: The air supply direction switching component comprises a T-shaped tube (13) connected and fixed to the air outlet of the air pump (12); a first solenoid valve (14) is connected and fixed to the top of the left side of the carbon dioxide fire extinguishing medium storage box (3); the left side of the first solenoid valve (14) is connected and fixed to the right end of the T-shaped tube (13); the bottom end of the T-shaped tube (13) is connected and fixed to a second solenoid valve (15); the bottom of the second solenoid valve (15) is connected and fixed to a conduit (16); the bottom end of the conduit (16) extends into the rectangular hole; the first solenoid valve (14) and the second solenoid valve (15) are both electrically connected to the PLC controller (4).

3. The anti-burnout junction box used in a photovoltaic power generation system according to claim 2, characterized in that: The diffusion and blowing assembly comprises a hollow disk (8) arranged in a rectangular hole, the top left side of the hollow disk (8) is connected and fixed to the bottom end of the conduit (16), the temperature sensor (10) and the smoke sensor (11) are both fixedly connected to the bottom of the hollow disk (8), and the outer side and the bottom of the hollow disk (8) are both connected and fixed with a plurality of blowing heads (9), and the plurality of blowing heads (9) located on the outer side of the hollow disk (8) are arranged obliquely.

4. The anti-burnout junction box used in a photovoltaic power generation system according to claim 3, characterized in that: The fire extinguishing medium spraying assembly comprises a third solenoid valve (5) connected and fixed to the bottom of a carbon dioxide fire extinguishing medium storage box (3); the bottom of the third solenoid valve (5) is connected and fixed to a spray box (6); the outer bottom and the bottom of the spray box (6) are connected and fixed to a plurality of spray heads (7); the plurality of spray heads (7) located on the outer side of the spray box (6) are all arranged to be tilted downward; a hollow disk (8) is fixedly sleeved on the spray box (6); the hollow disk (8) is located above the plurality of spray heads (7); and the third solenoid valve (5) is electrically connected to a PLC controller (4).

5. The anti-burnout junction box used in a photovoltaic power generation system according to claim 1, characterized in that: A relief hole is provided on the left inner wall of the fixed cover (2), and the air inlet of the air pump (12) extends into the relief hole and is fixedly connected to a filter cover.

6. The anti-burnout junction box used in a photovoltaic power generation system according to claim 1, characterized in that: A plurality of downwardly inclined exhaust holes (1) are provided on the left inner wall of the box body (100), and a wireless transmission module for transmitting alarm information is built into the PLC controller (4).

7. The anti-burnout junction box used in a photovoltaic power generation system according to claim 1, characterized in that: An injection pipe connected to the interior of the carbon dioxide fire extinguishing medium storage box (3) is embedded and fixed on the top right side of the fixed cover (2), and a pipe cover is threadedly sleeved on the top end of the outer side of the injection pipe.

Images