Explosion-proof electric heater with multiple explosion-proof structures

Abstract

The utility model discloses an explosion-proof electric heater with multiple explosion-proof structures, which relates to the field of electric heaters, and comprises an external box, an internal heating box is fixed in the external box, two ends of the internal heating box are respectively communicated with an exhaust pipe and an air inlet pipe, one ends of the exhaust pipe and the air inlet pipe, which are far away from each other, respectively extend out of two ends of the external box, and the other ends of the exhaust pipe and the air inlet pipe are respectively communicated with the external box. In the actual operation of the device, when the electric heating pipe in the internal heating box is damaged and exploded, air pressure and fragments generated by the explosion can impact the barrier plate, so that the barrier plate extrudes the damper, the barrier plate leaves the position of the through groove at the moment of the impact, and the electric heating pipe in the internal heating box is not damaged and exploded. The internal heating box is communicated with the external box, so that impacted gas can be conveniently conveyed into the external box, the effect of buffering air pressure is achieved, and impact damage is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electric heaters, and in particular to an explosion-proof electric heater with multiple explosion-proof structures. Background Technology

[0002] With the rapid development of the national economy and the gradual improvement of people's living standards, railways have undergone comprehensive speed increases. At the same time, passengers have higher and higher requirements for travel time and comfort. When winter comes in the north, the temperature inside the train is low and passengers will feel cold. Therefore, in order to ensure the comfort of passengers inside the train, heating equipment needs to be installed inside the train.

[0003] Existing heaters are generally equipped with a single outer shell for protection. Single-layer protection is relatively weak, and when the internal heating components are overloaded and burst, it can easily cause safety hazards.

[0004] Therefore, it is necessary to propose an explosion-proof electric heater with multiple explosion-proof structures to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an explosion-proof electric heater with multiple explosion-proof structures to solve the problem that existing heaters are generally equipped with a single outer shell for protection, which is relatively weak and can easily cause safety hazards when the internal heating components are overloaded and burst.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an explosion-proof electric heater with multiple explosion-proof structures, including an outer box, an inner heating box fixed inside the outer box, an exhaust pipe and an air inlet pipe respectively connected to both ends of the inner heating box, the exhaust pipe and the air inlet pipe extending out of the two ends of the outer box respectively, and a fixing frame fixed inside the inner heating box, with an electric heating tube installed inside the fixing frame;

[0007] There is a gap between the outer side of the internal heating box and the inner wall of the outer box, and a through groove is provided on the outer side of the internal heating box. The interior of the internal heating box and the interior of the outer box are connected by the through groove. A baffle plate is slidably arranged in the through groove, and a damper is fixed between the baffle plate and the opposite side of the inner wall of the outer box.

[0008] Preferably, multiple through slots are provided, and multiple fixing brackets are provided, with the multiple fixing brackets being distributed at equal distances along the length direction of the internal heating box.

[0009] Preferably, a filter screen is fixedly connected to the inside of the air inlet pipe near the internal heating box, and a rotating shaft is provided on the side of the filter screen away from the internal heating box. The rotating shaft is rotatably connected to the inside of the air inlet pipe, and multiple rotating plates are fixedly connected to the outer ring of the rotating shaft.

[0010] Preferably, each of the multiple rotating plates has a cleaning brush fixed at the end away from the rotating shaft. The cleaning brush is elastic, and one end of one of the cleaning brushes is attached to one side of the filter screen.

[0011] Preferably, a pressure sensor and a temperature sensor are fixedly connected to the inner wall of the internal heating box.

[0012] Preferably, an alarm is fixed to the outside of the outer box, and a vibration sensor is provided on the barrier plate.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. In the actual operation of this utility model, when the wind enters the air inlet pipe, the pushing action of the wind can make multiple rotating plates rotate, thereby reducing the impact of the wind. After the wind is output from the air inlet pipe, the filter screen can intercept impurities and dust in the wind. Furthermore, when the rotating plates rotate, the dust and impurities stuck to the filter screen can be swept away by the cleaning brush to avoid clogging the mesh of the filter screen.

[0015] 2. In the actual operation of this utility model, when the electric heating tube inside the internal heating box is damaged and bursts, the gas pressure and fragments generated by the burst will impact the baffle plate, causing the baffle plate to squeeze the damper. At the moment of impact, the baffle plate leaves the through slot position, creating a connection between the internal heating box and the external box. This facilitates the delivery of impact gas to the external box, thereby buffering the gas pressure and reducing impact damage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the explosion-proof electric heater with multiple explosion-proof structures according to this utility model.

[0017] Figure 2 This is a schematic diagram of the internal heating box of this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the air pressure sensor of this utility model.

[0019] Figure 4 This is a schematic diagram of the structure of the rotating shaft and rotating plate of this utility model.

[0020] In the diagram: 1. External box; 2. Exhaust duct; 3. Inlet duct; 4. Internal heating box; 5. Fixing frame; 6. Electric heating element; 7. Through slot; 8. Baffle plate; 9. Damper; 10. Temperature sensor; 11. Filter screen; 12. Shaft; 13. Rotating plate; 14. Cleaning brush; 15. Air pressure sensor. Detailed Implementation

[0021] This utility model provides, for example Figures 1-4The explosion-proof electric heater with multiple explosion-proof structures shown includes an outer box 1, an inner heating box 4 fixed inside the outer box 1, an exhaust pipe 2 and an air inlet pipe 3 respectively connected to both ends of the inner heating box 4, the exhaust pipe 2 and the air inlet pipe 3 extending out of the outer box 1 at opposite ends, a fixing frame 5 fixed inside the inner heating box 4, and an electric heating tube 6 installed inside the fixing frame 5. In actual operation of this utility model, wind enters the interior of the inner heating box 4 through the air inlet pipe 3, and the heating effect of the electric heating tube 6 can convert cold air into hot air, which is then discharged from the exhaust pipe 2.

[0022] A filter screen 11 is fixedly connected to the inside of the air inlet pipe 3 near the internal heating box 4. A rotating shaft 12 is provided on the side of the filter screen 11 away from the internal heating box 4. The rotating shaft 12 is rotatably connected to the inside of the air inlet pipe 3, and multiple rotating plates 13 are fixedly connected to the outer ring of the rotating shaft 12. A cleaning brush 14 is fixed to the end of each of the multiple rotating plates 13 away from the rotating shaft 12. The cleaning brush 14 is elastic, and one end of one of the cleaning brushes 14 is attached to one side of the filter screen 11.

[0023] In the actual operation of this utility model, when the wind enters the air inlet pipe 3, the pushing action of the wind can make multiple rotating plates 13 rotate, thereby reducing the impact of the wind. After the wind is output from the air inlet pipe 3, the filter screen 11 can intercept impurities and dust in the wind. Furthermore, when the rotating plate 13 rotates, the cleaning brush 14 can sweep away the dust and impurities stuck to the filter screen 11 to avoid clogging the mesh of the filter screen 11.

[0024] There is a gap between the outer side of the internal heating box 4 and the inner wall of the outer box 1, and a through groove 7 is provided on the outer side of the internal heating box 4. The interior of the internal heating box 4 and the interior of the outer box 1 are connected through the through groove 7. A baffle plate 8 is slidably arranged in the through groove 7, and a damper 9 is fixed between the baffle plate 8 and the opposite side of the inner wall of the outer box 1.

[0025] In the actual operation of this utility model, when the electric heating tube 6 inside the internal heating box 4 is damaged and bursts, the gas pressure and fragments generated by the burst will impact the baffle plate 8, causing the baffle plate 8 to squeeze the damper 9. At the moment of impact, the baffle plate 8 leaves the position of the through groove 7, creating a connection between the internal heating box 4 and the external box 1, facilitating the delivery of the impacting gas into the external box 1, thereby buffering the gas pressure and reducing impact damage.

[0026] Furthermore, due to the double protection of the internal heating box 4 and the external box 1, the service life of the device can be improved. Even if the internal heating box 4 is damaged, it can still be used and protected.

[0027] Multiple through slots 7 are provided, and multiple fixing brackets 5 are provided, with multiple fixing brackets 5 distributed at equal distances along the length direction of the internal heating box 4.

[0028] A pressure sensor 15 and a temperature sensor 10 are fixedly connected to the inner wall of the internal heating box 4.

[0029] An alarm is fixed to the outside of the outer box 1, and a vibration sensor is installed on the baffle plate 8. The vibration sensor and the alarm are connected by a signal. When the baffle plate 8 generates impact vibration, the alarm can sound an alarm in real time.

Claims

1. Explosion-proof electric heater with multiple explosion-proof structure, comprising an outer box (1), characterized in that: The external box (1) is internally fixed with an internal heating box (4), both ends of the internal heating box (4) are respectively communicated with an exhaust pipe (2) and an air inlet pipe (3), the exhaust pipe (2) and the air inlet pipe (3) are respectively extended out of both ends of the external box (1) at ends away from each other, the internal heating box (4) is internally fixed with a fixing frame (5), and the fixing frame (5) is internally provided with an electric heating pipe (6). The internal heating box (4) is spaced from the inner wall of the external box (1), and the external side of the internal heating box (4) is provided with a through groove (7), the internal heating box (4) and the internal box (1) are communicated through the through groove (7), the through groove (7) is slidably provided with a blocking plate (8), and the blocking plate (8) and the inner wall of the external box (1) are fixed with a damper (9) on opposite sides.

2. The explosion-proof electric heater with multiple explosion-proof structures according to claim 1, characterized in that: The through groove (7) is provided with a plurality of through grooves, and the fixing frame (5) is provided with a plurality of fixing frames, and the plurality of fixing frames (5) are equidistantly distributed along the length direction of the internal heating box (4).

3. The explosion-proof electric heater with multiple explosion-proof structures according to claim 1, characterized in that: The air inlet pipe (3) is internally and fixedly connected with a filter screen (11) close to one end of the internal heating box (4), the filter screen (11) is provided with a rotating shaft (12) away from the internal heating box (4), the rotating shaft (12) is rotatably connected in the air inlet pipe (3), and a plurality of rotating plates (13) are fixedly connected to the outer circle of the rotating shaft (12).

4. The explosion-proof electric heater with multiple explosion-proof structures according to claim 3, characterized in that: The plurality of rotating plates (13) are fixed with cleaning brushes (14) away from the rotating shaft (12), the cleaning brushes (14) are elastic, and one end of one of the cleaning brushes (14) is correspondingly attached to one side of the filter screen (11).

5. The explosion-proof electric heater with multiple explosion-proof structure according to claim 1, characterized in that: The inner wall of the internal heating box (4) is fixedly connected with an air pressure sensor (15) and a temperature sensor (10).

6. The explosion-proof electric heater with multiple explosion-proof structures according to claim 1, characterized in that: The external box (1) is externally fixed with an alarm, and the blocking plate (8) is provided with a vibration sensor.

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