Explosion suppression device of photovoltaic inverter

Abstract

The invention discloses an explosion suppression device of a photovoltaic inverter, which relates to the technical field of combustible gas explosion prevention and comprises a shell, a hose, a storage bottle arranged in the shell, a baffle disc and a combustible gas sensor fixedly mounted on the baffle disc, a connecting seat is arranged on the upper surface of the storage bottle, and a connector is arranged on the connecting seat. The connector comprises a pressure valve and a pressure sensor, a controller is arranged on the connecting base and electrically connected with the connector, a connecting plate is fixedly connected to the side face of the baffle disc, and a jet head is fixedly connected to the surface of the connecting plate. According to the invention, in the operation process of the photovoltaic inverter, when some internal components break down and generate combustible gas, once the sensor is triggered, the controller receives a signal and then controls the pressure valve to open, so that the storage bottle is deflated through the connecting seat, and an inert medium is sprayed out through the connecting seat, the hose and the jet head; and the inverter case is filled with a high-concentration inert medium.

Description

Technical Field

[0001] The invention belongs to the field of combustible gas explosion prevention and control, and specifically designs an explosion suppression device for a photovoltaic inverter. Background Art

[0002] Photovoltaic inverters are key devices for converting DC power into AC power. Their main function is to convert the DC power generated by solar panels into AC power, thereby providing energy for household, industrial and commercial power facilities. During the operation of a photovoltaic inverter, once an internal component fails, it will inevitably lead to the generation of flammable gases. In the event of an internal circuit short circuit and discharge, the flammable gas mixture accumulated inside the inverter poses an explosion risk, which may pose a serious safety threat to the surrounding environment.

[0003] Regarding the use safety of photovoltaic inverters, invention patent CN114630532B discloses an explosion relief device for photovoltaic inverters. When an explosion occurs inside the chassis, the weak material plate and explosion relief port set on the inverter chassis are used to relieve pressure, thereby protecting the chassis from damage. Although the invention can protect the chassis to a great extent by means of explosion relief, there will be some damage to the inside of the chassis when an explosion occurs, and in the case of complex surrounding environment, the invention has certain limitations in use.

[0004] As for explosion suppression devices, the explosion suppression mechanism of some explosion suppressors is to quickly spray fire extinguishing medium when the explosion just occurs, so as to suppress the further formation of the explosion before the explosion is fully developed. For example, invention patent CN106422120A discloses an industrial pipeline combustible gas explosion suppression device, which calculates the propagation speed of the flame front through flame detectors arranged at a certain distance on the pipeline, so as to spray the explosion suppression medium at the appropriate time. Invention patent CN116889695A discloses a combustible gas pipeline explosion suppression device, which controls the boost valve by identifying the signal of the flame sensor to implement fire extinguishing. The gas generated by the photovoltaic inverter when an internal failure occurs contains a considerable proportion of hydrogen, and its explosion reaction occurs very quickly.

[0005] Therefore, an explosion suppression device for a photovoltaic inverter is provided to solve the above-mentioned problem. Summary of the invention

[0006] In view of this, an object of the present invention is to provide an explosion suppression device for a photovoltaic inverter to complete the explosion suppression function before the explosion begins to occur.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A photovoltaic inverter explosion suppression device comprises a shell, a hose, a storage bottle arranged inside the shell, a baffle plate and a combustible gas sensor fixedly mounted on the baffle plate, wherein a connecting seat is arranged on the upper surface of the storage bottle, a connector is arranged on the connecting seat, the connector comprises a pressure valve and a pressure sensor, a controller is arranged on the connecting seat, the controller is electrically connected to the connector, a connecting plate is fixedly connected to the side of the baffle plate, a jet head is fixedly connected to the surface of the connecting plate, an elastic airbag is fixedly connected to the surface of the jet head, a connecting groove is arranged on the surface of the elastic airbag, an air intake pipe is fixedly connected to the side of the elastic airbag, and a one-way valve is arranged inside the air intake pipe.

[0009] As a further description of the above technical solution:

[0010] The inert medium in the storage bottle is carbon dioxide, the inner wall of the shell is fixedly connected with a fixing frame, and the inner wall of the fixing frame is fixedly connected to the storage bottle.

[0011] As a further description of the above technical solution:

[0012] The side surface of the baffle plate is in the shape of an arc convex toward the center, and the inner wall of one end of the spray head and the connecting seat are both provided with internal threads.

[0013] As a further description of the above technical solution:

[0014] One end of the hose is fixedly connected to a first connector, a surface of the first connector is provided with a first external thread, and the other end of the hose is provided with a second connector, a surface of the second connector is provided with a second external thread.

[0015] As a further description of the above technical solution:

[0016] The combustible gas sensors include methane sensors, ethane sensors, ethylene sensors, propane sensors, hydrogen sensors, carbon monoxide sensors, and n-butane sensors.

[0017] As a further description of the above technical solution:

[0018] When the controller receives a signal from the combustible gas sensor, the controller controls the pressure valve to open.

[0019] As a further description of the above technical solution:

[0020] A box door is hinged on the front of the shell, and a handle and a door lock are arranged on the box door.

[0021] As a further description of the above technical solution:

[0022] The bottom of the shell is fixedly connected with a support plate, and a universal wheel is arranged at the bottom of the shell and at one side away from the support plate.

[0023] As a further description of the above technical solution:

[0024] A handle is fixedly connected to the upper surface of the shell.

[0025] As a further description of the above technical solution:

[0026] The inner wall of the shell is provided with symmetrically distributed hanging grooves.

[0027] By adopting the above technical solution, the controller is relied on to realize linkage. During the operation of the photovoltaic inverter, when some internal components fail to generate combustible gas, once the sensor is triggered, the controller will receive a signal, and the controller will then control the pressure valve to open so that the storage bottle is deflated through the connecting seat, and the inert medium is sprayed out through the connecting seat, the hose and the nozzle, so that the inverter chassis is filled with a high concentration of inert medium, thereby suppressing the occurrence of explosion, and can effectively prevent the inverter from exploding to cause a certain degree of damage to the surrounding environment. When the inert medium is sprayed out, the inert medium is blocked by the baffle plate, and it is not easy to cause damage to the internal structure of the inverter chassis. When installing the device, a through hole is opened on the inverter chassis, an air inlet pipe is inserted into the through hole, the baffle plate is placed inside the inverter chassis, and the connecting groove is located inside the through hole, and then air is supplied to the elastic airbag through the air inlet pipe, thereby causing the elastic airbag to expand, and the through hole is blocked by the elastic airbag, which does not affect the sealing of the inverter chassis, and is convenient for modifying the existing inverter chassis.

[0028] Furthermore, the inert medium in the storage device includes carbon dioxide.

[0029] Furthermore, the storage device is provided with a pressure gauge.

[0030] Furthermore, the air jet is a spherical nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for explanation.

[0032] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the shell structure of the present invention;

[0034] Figure 3 This is a schematic diagram of the baffle structure of the present invention;

[0035] Figure 4 It is a schematic diagram of the hose structure of the present invention.

[0036] Marking Description:

[0037] 1. Shell; 2. Storage bottle; 3. Connecting seat; 4. Connector; 5. Hose; 6. Jet nozzle; 7. Elastic airbag; 8. Inlet pipe; 9. Connecting groove; 10. Connecting plate; 11. Baffle plate; 12. First connector; 13. First external thread; 14. Second connector; 15. Second external thread; 16. Internal thread; 17. Hanging groove; 18. Handle; 19. Universal wheel; 20. Support plate; 21. Box door; 22. Door lock; 23. Handle; 24. Combustible gas sensor; 25. Controller; 26. Fixing bracket. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0039] Example 1

[0040] In this embodiment, if Figure 1 - Figure 4As shown, the present invention provides an explosion suppression device for a photovoltaic inverter, comprising a shell 1, a hose 5, a storage bottle 2 arranged inside the shell 1, a baffle 11 and a combustible gas sensor 24 fixedly mounted on the baffle 11, a connecting seat 3 is arranged on the upper surface of the storage bottle 2, a connector 4 is arranged on the connecting seat 3, the connector comprises a pressure valve and a pressure sensor 4, a controller 25 is arranged on the connecting seat 3, the controller 25 is electrically connected to the connector 4, a connecting plate 10 is fixedly connected to the side of the baffle 11, a jet head 6 is fixedly connected to the surface of the connecting plate 10, an elastic airbag 7 is fixedly connected to the surface of the jet head 6, a connecting groove 9 is arranged on the surface of the elastic airbag 7, an air intake pipe 8 is fixedly connected to the side of the elastic airbag 7, a one-way valve is arranged inside the air intake pipe 8, the side of the baffle 11 is in the shape of an arc convex toward the center, the jet head 6 and the inner wall of one end of the connecting seat 3 are both provided with internal threads 16, when the controller 25 receives a signal from the combustible gas sensor 24, the controller 25 controls the pressure valve When the combustible gas sensor 24 is turned on, the combustible gas sensor 24 can monitor the concentration of the combustible gas in the inverter in real time. Once the sensor is triggered, the controller 25 will receive a signal, and the controller 25 will then control the pressure valve to open so that the storage bottle 2 is deflated through the connecting seat 3, and the inert medium is sprayed out through the connecting seat 3, the hose 5 and the nozzle 6, so that the inverter chassis is filled with a high concentration of inert medium, thereby suppressing the occurrence of explosion, and can effectively prevent the explosion of the inverter from causing a certain degree of damage to the surrounding environment. When the inert medium is sprayed out, the inert medium is blocked by the baffle 11, and it is not easy to cause damage to the internal structure of the inverter chassis. When installing this device, a through hole is opened on the inverter chassis, the air inlet pipe 8 is inserted into the through hole, the baffle 11 is placed inside the inverter chassis, and the connecting groove 9 is located inside the through hole, and then the air is supplied to the elastic airbag 7 through the air inlet pipe 8, so that the elastic airbag 7 expands, and the through hole is blocked by the elastic airbag 7, which does not affect the sealing of the inverter chassis, and is convenient for modifying the existing inverter chassis.

[0041] Example 2

[0042] In this embodiment, if Figure 1 As shown, the inert medium in the storage bottle 2 is carbon dioxide, the inner wall of the outer shell 1 is fixedly connected with a fixing frame 26, the inner wall of the fixing frame 26 is fixedly connected to the storage bottle 2, the outer shell 1 provides external protection for the storage bottle 2, so that the storage bottle 2 is not easily damaged, and the combustible gas sensor 24 includes a methane sensor, an ethane sensor, an ethylene sensor, a propane sensor, a hydrogen sensor, a carbon monoxide sensor, and a n-butane sensor.

[0043] Example 3

[0044] In this embodiment, if Figure 1 , Figure 3 and Figure 4As shown, one end of the hose 5 is fixedly connected to the first connector 12, and the surface of the first connector 12 is provided with a first external thread 13. The other end of the hose 5 is provided with a second connector 14, and the surface of the second connector 14 is provided with a second external thread 15. When the connecting seat 3, the hose 5 and the nozzle 6 are connected together, the nozzle 6 is installed first, and then the shell 1 is installed, and then the first connector 12 is connected to the nozzle 6. The connection method is that the internal thread 16 on the nozzle 6 is threadedly matched with the first external thread 13, and the second connector 14 is connected to the connecting seat 3. The connection method is that the internal thread 16 on the connecting seat 3 is threadedly matched with the second external thread 15.

[0045] Example 4

[0046] In this embodiment, if Figure 1 and Figure 2 As shown, a door 21 is hinged on the front of the shell 1, and a handle 23 and a door lock 22 are provided on the door 21. When the storage bottle 2 is to be inspected, the door lock 22 is opened, and then the door 21 is opened by the handle 23. A support plate 20 is fixedly connected to the bottom of the shell 1, and a universal wheel 19 is provided on the bottom of the shell 1 and on the side away from the support plate 20. A handle 18 is fixedly connected to the upper surface of the shell 1, and a symmetrically distributed hanging groove 17 is provided on the inner wall of the shell 1. The storage bottle 2 is heavy and it is more laborious to transfer. When the present invention is transferred, the shell 1 is placed on the ground, and the staff holds the handle 18 and rotates the shell 1. The shell 1 is supported only by the universal wheel 19, which is convenient for pulling the shell 1 to move, and expansion screws are planted on the wall, and the shell 1 is hung on the wall through the hanging groove 17, and then the bolts are installed on the expansion screws to fix the shell 1.

[0047] The above description of the specific implementation further explains the purpose, technical solution and beneficial effects of the present invention. It should be noted that the above content is only a specific implementation of the present invention and is not intended to restrict it. Any changes, equivalent replacements, improvements, etc. that are consistent with the spirit and principles of the present invention will be included in its protection scope.

Claims

1. An explosion suppression device for a photovoltaic inverter, characterized in that: The invention comprises a shell (1), a hose (5), a storage bottle (2) arranged inside the shell (1), a baffle (11) and a combustible gas sensor (24) fixedly mounted on the baffle (11); a connection seat (3) is arranged on the upper surface of the storage bottle (2); a connector (4) is arranged on the connection seat (3); the connector comprises a pressure valve and a pressure sensor (4); a controller (25) is arranged on the connection seat (3); the controller (25) is electrically connected to the connector (4); a connection plate (10) is fixedly connected to the side of the baffle (11); a nozzle (6) is fixedly connected to the surface of the connection plate (10); an elastic airbag (7) is fixedly connected to the surface of the nozzle (6); a connection groove (9) is arranged on the surface of the elastic airbag (7); an air intake pipe (8) is fixedly connected to the side of the elastic airbag (7); a one-way valve is arranged inside the air intake pipe (8).

2. The explosion suppression device for photovoltaic inverter according to claim 1, characterized in that: The inert medium in the storage bottle (2) is carbon dioxide, the inner wall of the outer shell (1) is fixedly connected to a fixing frame (26), and the inner wall of the fixing frame (26) is fixedly connected to the storage bottle (2).

3. The explosion suppression device for photovoltaic inverter according to claim 1, characterized in that: The side surface of the baffle (11) is in the shape of an arc convex toward the center, and the inner walls of one end of the spray head (6) and the connecting seat (3) are both provided with internal threads (16).

4. The explosion suppression device for photovoltaic inverter according to claim 1, characterized in that: One end of the hose (5) is fixedly connected to a first connector (12), the surface of the first connector (12) is provided with a first external thread (13), and the other end of the hose (5) is provided with a second connector (14), the surface of the second connector (14) is provided with a second external thread (15).

5. The explosion suppression device for photovoltaic inverter according to claim 1, characterized in that: The combustible gas sensor (24) comprises a methane sensor, an ethane sensor, an ethylene sensor, a propane sensor, a hydrogen sensor, a carbon monoxide sensor, and an n-butane sensor.

6. The method for using the explosion suppression device of a photovoltaic inverter according to claim 1, characterized in that: When the controller (25) receives a signal from the combustible gas sensor (24), the controller (25) controls the pressure valve to open.

7. The method for using the explosion suppression device of a photovoltaic inverter according to claim 1, characterized in that: A door (21) is hingedly connected to the front of the housing (1), and a handle (23) and a door lock (22) are provided on the door (21).

8. The method for using the explosion suppression device of a photovoltaic inverter according to claim 1, characterized in that: The bottom of the housing (1) is fixedly connected to a support plate (20), and a universal wheel (19) is provided at the bottom of the housing (1) and on a side away from the support plate (20).

9. The method for using the explosion suppression device of the photovoltaic inverter according to claim 8, characterized in that: A handle (18) is fixedly connected to the upper surface of the housing (1).

10. The method for using the explosion suppression device of a photovoltaic inverter according to claim 1, characterized in that: The inner wall of the outer shell (1) is provided with symmetrically distributed hanging grooves (17).

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