A rear wall heater for an electric locomotive

Abstract

The utility model belongs to the technical field of heating facilities, concretely is a kind of electric locomotive rear wall fan heater, it is characterized in that, including: shell;Heating element, fixedly installed in the inside of shell, for heating air;Fan, fixedly installed in the inside of shell, and its air outlet is towards heating element, for blowing air to heating element.The utility model has the advantages of high power, low failure rate, small maintenance difficulty, high safety factor.

Description

Technical Field

[0001] This utility model relates to the field of heating facilities technology; specifically, this utility model relates to a rear wall heater for electric locomotives. Background Technology

[0002] Along the Xinshuo Railway, the lowest winter temperature can reach -30℃. When locomotives operate in such temperatures, the existing rear wall heaters are ineffective, noisy, and have a high failure rate. They often experience issues such as grounding failure and burnout, making it difficult to meet the heating requirements of the driver's cab in winter. The cold environment seriously affects the work of the crew, and the failure of the heaters also poses a great threat to driving safety. Utility Model Content

[0003] In view of this, the present invention provides a rear wall heating fan for electric locomotives, thereby solving or at least alleviating the above-mentioned problems existing in the prior art.

[0004] To achieve the aforementioned objectives, this utility model provides a rear wall heater for electric locomotives, comprising: case; The heating element is fixedly installed inside the housing and is used to heat the air; The fan is fixedly installed inside the housing, with its air outlet facing the heat source, and is used to blow air toward the heat source.

[0005] In the aforementioned electric locomotive rear wall heater, optionally, the fan includes: The fan cover is fixedly installed inside the housing and serves as the frame of the fan. The inside of the fan cover is arc-shaped, and its ends face the heat-generating element for air guidance. The fastening ring is provided in multiple sets, and all sets of the fastening ring are rotatably disposed inside the fan casing; Blades, disposed between two fastening rings, are equidistantly distributed along the circumference of the fastening rings and are used to blow air toward the heating element; The motor is located inside the housing, and its output end is connected to the fastening ring at the far end to drive the blades to rotate.

[0006] In the aforementioned electric locomotive rear wall heater, optionally, the fan further includes: A movable ring is disposed on the blade, and the movable ring moves laterally back and forth between two adjacent fastening rings; A sliding block is fixedly installed inside the moving ring and is equidistantly distributed along the circumference of the moving ring. The sliding block is located between two adjacent blades, and the outer surface of the sliding block is in contact with the outer surface of the blade for wiping the outer surface of the blade.

[0007] In the aforementioned electric locomotive rear wall heater, optionally, the fan further includes: A bidirectional lead screw is rotatably connected to a fastening ring, and the bidirectional lead screw is threadedly connected to a movable ring. The drive gear is fixedly installed at the end of the bidirectional lead screw and is used to drive the bidirectional lead screw to rotate along its axial direction. The fan housing has three arc-shaped toothed rings, all of which are radially slidably mounted on the fan housing. The three arc-shaped toothed rings can be closed to form a complete toothed ring, which can mesh with the drive gear.

[0008] In the aforementioned electric locomotive rear wall heater, optionally, the fan further includes: The first groove is formed on the fan casing, and the orientation of the first groove is consistent with the radial direction of the arc-shaped toothed ring; The movable rod is fixedly installed on the side of the arc-shaped toothed ring away from the blade, and slidably installed inside the first groove; The rotating ring is mounted on the fan casing. The second slide groove is formed on the rotating ring. The second slide groove is inclined, and the moving rod is slidably installed in the second slide groove.

[0009] In the aforementioned electric locomotive rear wall heater, optionally, the fan further includes: The drive rod is fixedly installed on the side of the rotating ring away from the blades and is used to drive the rotating ring to rotate. A movable frame is slidably mounted on the outside of the drive rod, and the top end of the movable frame is slidably mounted on the top end of the fan casing for driving the rotating ring to rotate; A movable block is slidably mounted on the top of the movable frame in the height direction. The movable block can be inserted into the fan cover to lock the movable frame.

[0010] This utility model discloses a rear wall heater for electric locomotives. It uses a fan to force cold air into the air inlet and blow it towards the heating element. The heating element heats the air, and then the hot air is blown out through the fan casing to the air outlet. The fan casing is provided with an arc-shaped toothed ring. The drive toothed ring can roll inside the arc-shaped toothed ring, causing the sliding block to move laterally on the blades to clean the blades. Attached Figure Description

[0011] The disclosure of this utility model will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings: Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2This is a schematic diagram of the internal structure of Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the fan structure according to Embodiment 2 of this utility model; Figure 4 This is a schematic diagram of the connection structure between the drive gear ring and the drive gear of this utility model; Figure 5 This is a schematic diagram of the connection structure between the rotating ring and the movable frame of this utility model; Figure 6 This is a schematic diagram of the connection structure between the movable ring and the bidirectional lead screw of this utility model.

[0012] Reference numerals: 1. Housing; 2. Heating element; 3. Fan; 4. Fan cover; 5. Fastening ring; 6. Blade; 7. Motor; 8. Moving ring; 9. Sliding block; 10. Bidirectional lead screw; 11. Drive gear; 12. Arc-shaped gear ring; 13. First slide groove; 14. Moving rod; 15. Rotating ring; 16. Second slide groove; 17. Drive rod; 18. Moving frame; 19. Moving block. Detailed Implementation

[0013] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0014] like Figure 1 and Figure 2 As shown, in Embodiment 1, a rear wall heater for an electric locomotive includes: Casing 1; Heating element 2 is fixedly installed inside housing 1 and is used to heat air; The fan 3 is fixedly installed inside the housing 1, with its air outlet facing the heat source 2, and is used to blow air toward the heat source 2.

[0015] Specifically, the housing 1 also contains a starting capacitor for the motor 7 (capacity 1μF±5%, rated voltage AC450V). Heating element 2 insulation layer (size 270mm) 80mm (34mm, insulation resistance >= 200MΩ in cold state, insulation layer resistance >= 2.5MΩ in hot state, insulation resistance >= 2MΩ under humid and hot conditions) is set outside the heating element 2, which can greatly increase the insulation between the heating element 2 and the shell 1, effectively avoid the occurrence of accidents such as auxiliary grounding and leakage, and improve the safety performance of the utility model; The air switch (rated voltage 400V, current 16-63A, breaking capacity 6KA) can effectively prevent the heater from burning out due to short circuits and grounding, and avoid the drawback of needing to replace fuses frequently. Heating element 2 is a PTC heating element with a rated voltage of AC220V 50HZ, a rated power of 2500W, and a size of 244mm. 68mm The 20mm is an automatic constant temperature, energy-saving electric heater with low thermal resistance, high heat exchange efficiency, excellent thermal conductivity and heat dissipation performance, and high safety performance. The 2500W PTC heating element can work for 1 hour in an 8m3 enclosed space in an external environment of -30℃, which is sufficient to bring the indoor temperature to a comfortable temperature for the human body.

[0016] When in use, install the housing 1 in the desired location, turn on the fan 3 so that the fan 3 draws cold air from the outside into the housing 1 and blows the drawn-in cold air toward the heating element 2. The heating element 2 heats the air and then blows the heated air out.

[0017] Fan 3 includes: The fan cover 4 is fixedly installed inside the housing 1 and serves as the frame part of the fan 3. The inside of the fan cover 4 is arc-shaped, and its end faces the heat-generating element 2 for air guidance. The fastening ring 5 is provided in multiple sets, and all sets of fastening rings 5 ​​are rotatably installed inside the fan outer casing 4; Blades 6 are disposed between two fastening rings 5. The blades 6 are equidistantly distributed along the circumference of the fastening rings 5 ​​and are used to blow air toward the heating element 2. Motor 7 is located inside housing 1. The output end of motor 7 is connected to blade 6 and is used to drive blade 6 to rotate.

[0018] Specifically, motor 7 is a shaded-pole motor with a rated voltage of AC220V 50HZ, a rated power of 15W, and a rated speed of 2400RPM. It has the advantages of low noise and strong voltage adaptability. When the fan 3 needs to be started, the motor 7 is started, which drives the blades 6 to rotate and draws the cold air from the outside into the housing 1. The rotation of the blades 6 blows the cold air into the inside of the fan casing 4. The cold air is guided by the arc surface inside the fan casing 4 and moves toward the heating element 2. It is heated by the heating element 2 and blown out from the housing 1.

[0019] like Figures 3 to 6 As shown, in Embodiment 2, the fan 3 further includes: The movable ring 8 is set on the blade 6, and the movable ring 8 moves laterally back to its original position between two adjacent fastening rings 5. The sliding block 9 is fixedly installed inside the moving ring 8 and is equidistantly distributed along the circumference of the moving ring 8. The sliding block 9 is located between two adjacent blades 6, and the outer surface of the sliding block 9 is in contact with the outer surface of the blade 6 for wiping the outer surface of the blade 6.

[0020] Specifically, the outer surface of the sliding block 9 is provided with a sponge, and the sponge is in contact with the outer surface of the blade 6; When the moving ring 8 moves laterally on the blade 6, it can drive the sliding block 9 to move laterally on the blade 6 and clean the dust on the outer surface of the blade 6, preventing excessive dust accumulation on the blade 6 and reducing the heating efficiency of the heater.

[0021] Fan 3 also includes: The bidirectional lead screw 10 is rotatably connected inside the blade 6, and the bidirectional lead screw 10 is threadedly connected to the second moving ring 8. The drive gear 11 is fixedly installed at the end of the bidirectional lead screw 10 and is used to drive the bidirectional lead screw 10 to rotate along its axial direction. There are three arc-shaped toothed rings 12. All three arc-shaped toothed rings 12 are slidably mounted on the fan housing 4 in their radial direction. The three arc-shaped toothed rings 12 can be closed to form a complete toothed ring. The arc-shaped toothed rings 12 can mesh with the drive gear 11.

[0022] When it is necessary to clean the blade 6, first turn off the motor 7 to stop the device. Then move the three arc-shaped toothed rings 12 radially to close them and form a complete toothed ring. At this time, the arc-shaped toothed ring 12 meshes with the drive gear 11. Then restart the motor 7 to make the blade 6 rotate and drive the double-acting screw 10 to rotate in the circumferential direction of the arc-shaped toothed ring 12. At this time, the drive gear 11 rolls inside the arc-shaped toothed ring 12 and drives the double-acting screw 10 to rotate in its own circumferential direction. This drives the moving ring 8 to reciprocate along the axial direction of the double-acting screw 10, thus cleaning the dust on the blade 6 without stopping the machine.

[0023] Fan 3 also includes: The first groove 13 is formed on the fan casing 4, and the orientation of the first groove 13 is consistent with the radial direction of the arc-shaped toothed ring 12. The movable rod 14 is fixedly installed on the side of the arc-shaped toothed ring 12 away from the blade 6, and is slidably installed inside the first groove 13; Rotating ring 15 is rotatably mounted on fan housing 4; The second slide groove 16 is formed on the rotating ring 15. The second slide groove 16 is inclined, and the moving rod 14 is slidably installed in the second slide groove 16.

[0024] When the radial position of the arc-shaped toothed ring 12 needs to be adjusted, the rotating ring 15 rotates, causing the second slide groove 16 to rotate. By utilizing the rotation of the second slide groove 16 and its cooperation with the first slide groove 13, the moving rod 14 can be squeezed, allowing the moving rod 14 to drive the arc-shaped toothed ring 12 to move radially. This allows the arc-shaped toothed ring 12 to mesh with the drive gear 11, or to separate from the drive gear 11. When the arc-shaped toothed ring 12 meshes with the drive gear 11, the blade 6 rotates, causing the drive gear 11 to roll inside the arc-shaped toothed ring 12, allowing the moving ring 8 to reciprocate along the axial direction of the bidirectional lead screw 10.

[0025] Fan 3 also includes: The drive rod 17 is fixedly installed on the side of the rotating ring 15 away from the blade 6, and is used to drive the rotating ring 15 to rotate. The movable frame 18 is slidably mounted on the outside of the drive rod 17, and the top of the movable frame 18 is slidably mounted on the top of the fan 3 casing; The movable block 19 is slidably mounted on the top of the movable frame 18 in the height direction. The movable block 19 can be inserted into the fan cover 4 to lock the movable frame 18.

[0026] Specifically, two sockets are provided on the fan casing 4, and the movable block 19 can be inserted into the sockets. The distance between the two sockets is the maximum angle that the rotating ring 15 can rotate. When in use, lift the moving block 19 and pull it out of the socket. At this time, pull the moving block 19 to move the moving frame 18 on the top of the fan cover 4, thereby driving the drive rod 17 to move, causing the rotating ring 15 to rotate, and controlling the radial displacement of the arc-shaped toothed ring 12. When it is necessary to lock the rotating ring 15, press the moving block 19 down to lock the moving block 19, so that the arc-shaped toothed ring 12 can be locked in the state of meshing with the drive gear 11, or locked in the state of being disengaged from the drive gear 11.

[0027] Compared to Embodiment 1, Embodiment 2 has the feature of cleaning the blades 6 without stopping the machine, preventing excessive dust accumulation on the blades 6 and thus reducing the heating efficiency of the heater.

[0028] The technical scope of this utility model is not limited to the contents of the above description. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the scope of this utility model.

Claims

1. A rear wall heater for electric locomotives, characterized in that, include: Shell (1); The heating element (2) is fixedly installed inside the housing (1) and is used to heat the air; The fan (3) is fixedly installed inside the housing (1) with its air outlet facing the heating element (2) to blow air toward the heating element (2).

2. The electric locomotive rear wall heater as described in claim 1, characterized in that, The fan (3) includes: The fan cover (4) is fixedly installed inside the housing (1) as the frame part of the fan (3). The inside of the fan cover (4) is arc-shaped and its end faces the heat source (2) for air guidance. The fastening ring (5) is provided in multiple sets, and all sets of the fastening ring (5) are rotatably installed inside the fan cover (4); Blades (6) are disposed between two fastening rings (5), and the blades (6) are equidistantly distributed along the circumferential direction of the fastening rings (5) to blow air toward the heating element (2). The motor (7) is located inside the housing (1). The output end of the motor (7) is connected to the fastening ring (5) at the far end, and is used to drive the blade (6) to rotate.

3. A rear wall heater for electric locomotives as described in claim 2, characterized in that, The fan (3) also includes: A movable ring (8) is disposed on the blade (6), and the movable ring (8) moves laterally back and forth between two adjacent fastening rings (5); The sliding block (9) is fixedly installed inside the moving ring (8) and is equidistantly distributed along the circumference of the moving ring (8). The sliding block (9) is located between two adjacent blades (6). The outer surface of the sliding block (9) is in contact with the outer surface of the blade (6) and is used to wipe the outer surface of the blade (6).

4. A rear wall heater for electric locomotives as described in claim 3, characterized in that, The fan (3) also includes: A bidirectional lead screw (10) is rotatably connected to a fastening ring (5), and the bidirectional lead screw (10) is threadedly connected to a moving ring (8); A drive gear (11) is fixedly installed at the end of the double-acting lead screw (10) and is used to drive the double-acting lead screw (10) to rotate along its axial direction. There are three arc-shaped toothed rings (12), and the three arc-shaped toothed rings (12) are all slidably mounted on the fan housing (4) in their radial direction. The three arc-shaped toothed rings (12) can be closed to form a complete toothed ring, and the arc-shaped toothed rings (12) can mesh with the drive gear (11).

5. A rear wall heater for electric locomotives as described in claim 4, characterized in that, The fan (3) also includes: The first groove (13) is formed on the fan casing (4), and the orientation of the first groove (13) is consistent with the radial direction of the arc-shaped toothed ring (12); The movable rod (14) is fixedly installed on the side of the arc-shaped toothed ring (12) away from the blade (6) and is slidably installed inside the first groove (13); Rotating ring (15) is rotatably mounted on the fan casing (4); The second slide groove (16) is opened on the rotating ring (15). The second slide groove (16) is inclined, and the moving rod (14) is slidably installed in the second slide groove (16).

6. A rear wall heater for electric locomotives as described in claim 5, characterized in that, The fan (3) also includes: The drive rod (17) is fixedly installed on the side of the rotating ring (15) away from the blade (6) and is used to drive the rotating ring (15) to rotate. The movable frame (18) is slidably mounted on the outside of the drive rod (17), and the top of the movable frame (18) is slidably mounted on the top of the fan (3) cover for driving the rotating ring (15) to rotate. A movable block (19) is slidably mounted on the top of the movable frame (18) in the height direction. The movable block (19) can be inserted into the fan cover (4) to lock the movable frame (18).

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