Moisture-proof and explosion-proof frequency converter for crane

Abstract

The utility model relates to the technical field of frequency converters, and discloses a damp-proof and explosion-proof frequency converter for a crane, which comprises a rectangular box, a fire extinguishing mechanism is arranged above the rectangular box, the fire extinguishing mechanism comprises a storage box, the bottom surface of the storage box is fixedly connected with the upper surface of the rectangular box, and the upper surface of the storage box is fixedly connected with a control box. The inner bottom wall of the control box is fixedly connected with a controller, the upper surface of the storage box fixedly communicates with an injection pipe, and the outer surface of the injection pipe is in threaded connection with a threaded cover. According to the damp-proof and explosion-proof frequency converter for the crane, a circular plate clamped in a circular opening is ejected out of the interior of the circular opening through pressure intensity, so that a large amount of dry powder in a storage box can flow into a rectangular box under the action of operation of a booster pump, the purpose of extinguishing the frequency converter in the rectangular box is achieved, and it is effectively avoided that when the device is used, the device is damaged; the problem that fire increases due to the fact that the frequency converter cannot extinguish fire in the first time after being on fire due to the fact that the frequency converter does not have the function of automatic fire extinguishing is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, in particular to a moisture-proof and explosion-proof frequency converter for cranes. Background Art

[0002] A frequency converter is an electrical device that changes the power frequency of a motor. It is mainly composed of a rectifier, a filter, an inverter, a braking unit, a drive unit, a detection unit, and a microprocessor unit. The use of a frequency converter not only reduces power consumption, but also reduces the impact and noise of the equipment and extends the service life of the equipment. Therefore, its frequency converter is widely used in various large-scale electrical equipment. At present, in order to ensure a longer service life of the frequency converter, general frequency converters have explosion-proof and moisture-proof functions.

[0003] At present, the existing inverters have relatively simple functions when they are working. When the inverters are explosion-proof, most of them guide the heat generated by the inverters to the outside world to reduce the air pressure around the inverters. This method can only guide the heat to be dissipated. When the inverter catches fire, the inverter cannot be extinguished, resulting in the flames being unable to be extinguished in time and the fire increasing.

[0004] Therefore, those skilled in the art provide a moisture-proof and explosion-proof inverter for cranes to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to provide a moisture-proof and explosion-proof frequency converter for cranes to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A moisture-proof and explosion-proof frequency converter for a crane comprises a rectangular box, and a fire extinguishing mechanism is arranged above the rectangular box;

[0008] The fire extinguishing mechanism includes a storage box, the bottom surface of the storage box is fixedly connected to the upper surface of the rectangular box, the upper surface of the storage box is fixedly connected to a control box, the inner bottom wall of the control box is fixedly connected to a controller, the upper surface of the storage box is fixedly connected to an injection pipe, the outer surface of the injection pipe is threadedly connected to a threaded cover, a booster pump is arranged above the storage box, the input end of the booster pump is fixedly connected to an exhaust pipe, the output end of the booster pump is fixedly connected to an outlet pipe, the bottom end of the outlet pipe passes through the storage box and extends to the inside of the storage box, circular openings are opened on the upper surface of the rectangular box and the bottom surface of the storage box, a circular plate is clamped inside one of the circular openings, an open flame detector is fixedly connected to the inner wall of the rectangular box, and the controller is electrically connected to the booster pump and the open flame detector respectively through wires.

[0009] As a further solution of the utility model: the inner walls of the rectangular box are respectively fixedly connected with a frequency converter, a temperature sensor and a dustproof net, and the frequency converter and the temperature sensor are electrically connected to the controller through wires.

[0010] As a further solution of the utility model: a cross plate is fixedly connected to the inner wall of the rectangular box, and a fan is fixedly connected to the front side of the cross plate.

[0011] As a further solution of the utility model: the front and back of the rectangular box are fixedly connected with a force-bearing plate, the bottom surface of each force-bearing plate is fixedly connected with a telescopic rod, and each telescopic rod and the fan are electrically connected to the controller through a wire.

[0012] As a further solution of the utility model: the telescopic end of each telescopic rod is fixedly connected with a baffle, and the side surfaces of the two baffles close to each other are in contact with the front side and the back side of the rectangular box respectively.

[0013] As a further solution of the utility model: a top plate is clamped inside the control box, a pull handle is fixedly connected to the upper surface of the top plate, a movable door is movably hinged on the left side of the rectangular box, a handle is fixedly connected to the left side of the movable door, a fixed seat is fixedly connected to the outer surface of the boosting pump, and the bottom surface of the fixed seat is fixedly connected to the upper surface of the storage box.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model is provided with a rectangular box, a storage box, a control box, a controller, an injection pipe and a threaded cover which cooperate with each other. Dry powder can be injected into the storage box through the injection pipe, and the threaded cover can ensure that the dry powder will not contact with the outside air when the device is not in use. The flame inside the rectangular box can be detected in cooperation with the open flame detector. The booster pump is driven by the controller to operate, so that the booster pump drives the exhaust pipe to draw the outside air into the inside of the booster pump, and finally the air is discharged into the storage box through the exhaust pipe, so that the pressure in the storage box can be increased, and the circular plate clamped inside the circular opening can be pushed out of the inside of the circular opening by the pressure. At this point, a large amount of dry powder inside the storage box will flow into the inside of the rectangular box under the action of the booster pump, thereby completing the purpose of extinguishing the fire of the inverter inside the rectangular box, thereby effectively avoiding the problem that the device does not have the function of automatic fire extinguishing when in use, resulting in the inverter being unable to be extinguished in the first time after catching fire, thereby causing the fire to increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a moisture-proof and explosion-proof inverter for cranes;

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of a controller in a moisture-proof and explosion-proof frequency converter for cranes;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of a temperature sensor in a moisture-proof and explosion-proof inverter for cranes;

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of a fan in a moisture-proof and explosion-proof inverter for a crane.

[0020] In the figure: 1. rectangular box; 2. fire extinguishing mechanism; 201. injection pipe; 202. control box; 203. threaded cover; 204. storage box; 205. exhaust pipe; 206. booster pump; 207. exhaust pipe; 208. controller; 209. circular mouth; 210. circular plate; 211. open flame detector; 3. pull handle; 4. top plate; 5. force plate; 6. telescopic rod; 7. baffle; 8. movable door; 9. handle; 10. inverter; 11. cross plate; 12. fan; 13. fixing seat; 14. dust net; 15. temperature sensor. DETAILED DESCRIPTION

[0021] See also Figure 1-4 A moisture-proof and explosion-proof frequency converter for a crane comprises a rectangular box 1, a fire extinguishing mechanism 2 is arranged above the rectangular box 1, the fire extinguishing mechanism 2 comprises a storage box 204, the bottom surface of the storage box 204 is fixedly connected to the upper surface of the rectangular box 1, a control box 202 is fixedly connected to the upper surface of the storage box 204, a controller 208 is fixedly connected to the inner bottom wall of the control box 202, a frequency converter 10, a temperature sensor 15 and a dustproof net 14 are fixedly connected to the inner walls of the rectangular box 1 respectively, the frequency converter 10 and the temperature sensor 15 are electrically connected to the controller 208 through wires, the temperature sensor 15 and the dustproof net 14 are arranged, the temperature inside the rectangular box 1 can be detected by the temperature sensor 15, and the dustproof net 14 can prevent external dust from entering the interior of the rectangular box 1.

[0022] The upper surface of the storage box 204 is fixedly connected to an injection pipe 201, the outer surface of the injection pipe 201 is threadedly connected to a threaded cover 203, the inner wall of the rectangular box 1 is fixedly connected to a cross plate 11, and the front of the cross plate 11 is fixedly connected to a fan 12. By providing the cross plate 11 and the fan 12, the fan 12 can be fixed by the cross plate 11, and the fan 12 can quickly blow out the heat inside the rectangular box 1.

[0023] A booster pump 206 is arranged above the storage box 204, and the input end of the booster pump 206 is fixedly connected to an exhaust pipe 205. The front and the back of the rectangular box 1 are fixedly connected to a force-bearing plate 5, and the bottom surface of each force-bearing plate 5 is fixedly connected to a telescopic rod 6. Each telescopic rod 6 and the fan 12 are electrically connected to the controller 208 through a wire. By providing the force-bearing plate 5 and the telescopic rod 6, a better force-bearing position can be provided for the telescopic rod 6 through the force-bearing plate 5, thereby ensuring that the telescopic rod 6 operates more stably.

[0024] The output end of the booster pump 206 is fixedly connected to an air outlet pipe 207, the bottom end of the air outlet pipe 207 passes through the storage box 204 and extends to the inside of the storage box 204, and circular openings 209 are provided on the upper surface of the rectangular box 1 and the bottom surface of the storage box 204, a circular plate 210 is clamped inside one of the circular openings 209, and an open flame detector 211 is fixedly connected to the inner wall of the rectangular box 1, and each telescopic end of the telescopic rod 6 is fixedly connected to a baffle 7, and the side surfaces of the two baffles 7 that are close to each other are in contact with the front side of the rectangular box 1 and the back side of the rectangular box 1 respectively, and by providing the baffle 7, the baffle 7 can be used to isolate the rectangular box 1 from the outside world, thereby achieving a better auxiliary effect.

[0025] The controller 208 is electrically connected to the boosting pump 206 and the open flame detector 211 through wires, the top plate 4 is clamped inside the control box 202, the upper surface of the top plate 4 is fixedly connected with a pulling handle 3, the left side of the rectangular box 1 is movably hinged with a movable door 8, the left side of the movable door 8 is fixedly connected with a handle 9, the outer surface of the boosting pump 206 is fixedly connected with a fixing seat 13, the bottom surface of the fixing seat 13 is fixedly connected to the upper surface of the storage box 204, by providing the top plate 4, the pulling handle 3, the movable door 8 and the handle 9, the pulling handle 3 and the handle 9 can respectively apply pulling force to the top plate 4 and the movable door 8, thereby achieving a better auxiliary effect.

[0026] The working principle of the utility model is: when in use, firstly connect the booster pump 206, the open flame detector 211, the temperature sensor 15, the controller 208, the telescopic rod 6 and the fan 12 to the power supply respectively. When the temperature inside the rectangular box 1 is too high, the temperature sensor 15 fixed inside the rectangular box 1 will detect it, and then transmit the information to the controller 208 through an electrical signal, and the controller 208 also transmits the information to the telescopic rod 6 and the fan 12 through an electrical signal. The telescopic rod 6 will push the baffle 7 to move downward, thereby connecting the inner and outer spaces of the rectangular box 1. Then the operation of the fan 12 can accelerate the air flow, thereby quickly bringing out the temperature inside the rectangular box 1. When the inverter 10 inside the rectangular box 1 catches fire, the open flame detector 211 can detect the flame inside the rectangular box 1. Cooperate with the controller 208 to drive the booster pump 206 to operate, so that the booster pump 206 drives the exhaust pipe 205 to draw the outside air into the inside of the booster pump 206, and finally discharge the air into the storage box 204 through the exhaust pipe 207, so that the pressure in the storage box 204 can be increased, thereby the circular plate 210 clamped inside the circular opening 209 can be pushed out of the circular opening 209 by pressure, and a large amount of dry powder inside the storage box 204 will flow into the interior of the rectangular box 1 under the action of the booster pump 206, thereby completing the purpose of extinguishing the inverter 10 inside the rectangular box 1, thereby effectively avoiding the problem that the device does not have the function of automatic fire extinguishing when in use, resulting in the inverter 10 being unable to be extinguished in the first time after catching fire, thereby causing the fire to increase.

[0027] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A moisture-proof and explosion-proof frequency converter for a crane, comprising a rectangular box (1), characterized in that: A fire extinguishing mechanism (2) is arranged above the rectangular box (1); The fire extinguishing mechanism (2) comprises a storage box (204), the bottom surface of the storage box (204) is fixedly connected to the upper surface of the rectangular box (1), the upper surface of the storage box (204) is fixedly connected to a control box (202), the inner bottom wall of the control box (202) is fixedly connected to a controller (208), the upper surface of the storage box (204) is fixedly connected to an injection pipe (201), the outer surface of the injection pipe (201) is threadedly connected to a threaded cover (203), a booster pump (206) is arranged above the storage box (204), and the input end of the booster pump (206) is fixedly connected to a pump (206). The output end of the booster pump (206) is fixedly connected to an air outlet pipe (207), the bottom end of the air outlet pipe (207) passes through the storage box (204) and extends to the inside of the storage box (204), the upper surface of the rectangular box (1) and the bottom surface of the storage box (204) are both provided with circular openings (209), a circular plate (210) is clamped inside one of the circular openings (209), the inner wall of the rectangular box (1) is fixedly connected to an open flame detector (211), and the controller (208) is electrically connected to the booster pump (206) and the open flame detector (211) respectively through wires.

2. The moisture-proof and explosion-proof inverter for crane according to claim 1 is characterized in that: The inner wall of the rectangular box (1) is respectively fixedly connected with a frequency converter (10), a temperature sensor (15) and a dust screen (14), and the frequency converter (10) and the temperature sensor (15) are both electrically connected to a controller (208) via wires.

3. The moisture-proof and explosion-proof inverter for crane according to claim 1, characterized in that: A cross plate (11) is fixedly connected to the inner wall of the rectangular box (1), and a fan (12) is fixedly connected to the front side of the cross plate (11).

4. The moisture-proof and explosion-proof inverter for crane according to claim 3 is characterized in that: The front and back sides of the rectangular box (1) are both fixedly connected to a force-bearing plate (5), the bottom surface of each force-bearing plate (5) is fixedly connected to a telescopic rod (6), and each telescopic rod (6) and the fan (12) are electrically connected to the controller (208) via a wire.

5. The moisture-proof and explosion-proof inverter for crane according to claim 4, characterized in that: The telescopic end of each telescopic rod (6) is fixedly connected to a baffle (7), and the side surfaces of the two baffles (7) that are close to each other are in contact with the front side of the rectangular box (1) and the back side of the rectangular box (1) respectively.

6. The moisture-proof and explosion-proof inverter for crane according to claim 1, characterized in that: The control box (202) is internally clamped with a top plate (4), the upper surface of the top plate (4) is fixedly connected to a pull handle (3), the left side of the rectangular box (1) is movably hinged with a movable door (8), the left side of the movable door (8) is fixedly connected to a handle (9), the outer surface of the booster pump (206) is fixedly connected to a fixed seat (13), and the bottom surface of the fixed seat (13) is fixedly connected to the upper surface of the storage box (204).

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