Portable high-pressure hot air blower

Abstract

The utility model provides a portable high-pressure hot air blower, which relates to the technical field of snow cleaning equipment, aims to solve the problem of low ice and snow cleaning efficiency of railway turnouts in the prior art, and comprises a fan, an air supply pipe, a cold air heating bin and a hot air spraying pipe, one end of the air supply pipe is connected with an air outlet of the draught fan, the other end of the air supply pipe is connected with an air inlet of the cold air heating bin, an air outlet of the cold air heating bin is connected with the hot air spraying pipe, and cold air blown by the draught fan is heated into high-temperature hot air after passing through the cold air heating bin and sprayed out of the hot air spraying pipe. When ice and snow are cleaned, firstly, the ice and snow needing to be cleaned in a turnout area of the railway turnout are melted by high-temperature hot air, and the melted ice water is randomly blown away from the cleaning area by high-pressure and high-speed hot air flow, so that the purpose of removing the ice and snow is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of snow cleaning equipment, in particular to a portable high-pressure hot air blower. Background Art

[0002] As is well known, it is often necessary to clean ice and snow on outdoor mechanical equipment in winter. For example, in the railway transportation system, it is necessary to clean ice and snow on railway switches after snow in winter to ensure the flexibility of the switch turning, so as to create safe and reliable railway operation conditions.

[0003] Under the existing conditions, the ice and snow cleaning work of railway switches mainly relies on manual cleaning operations with brooms, shovels, and ordinary cold air blowers. When encountering the situations of switch icing, thick snow accumulation, and wet snow, the cleaning work is very difficult and the cleaning efficiency is low. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a portable high-pressure hot air blower to solve the problem of low ice and snow cleaning efficiency of railway switches in the prior art. The portable high-pressure hot air blower of the utility model makes the ice and snow cleaning work easier and improves the work efficiency of ice and snow cleaning.

[0005] A portable high-pressure hot air blower provided by the utility model includes a blower, an air delivery pipe, a cold air heating chamber, and a hot air ejection pipe. One end of the air delivery pipe is connected to the air outlet of the blower and the other end is connected to the air inlet of the cold air heating chamber. The air outlet of the cold air heating chamber is connected to the hot air ejection pipe. The cold air blown by the blower is heated to high-temperature hot air in the cold air heating chamber and ejected from the hot air ejection pipe.

[0006] As a preferred scheme of the utility model, a flame generator is arranged in the cold air heating chamber. The flame generator includes a combustion chamber, a fuel delivery pipeline, and an electric pulse igniter. One end of the fuel delivery pipeline is connected to the combustion chamber and the other end is connected to a fuel storage tank arranged outside the cold air heating chamber. One end of the electric pulse igniter is connected to the combustion chamber and the other end is connected to a power supply circuit.

[0007] As a preferred scheme of the utility model, the combustion chamber and the cold air heating chamber are coaxially arranged, and the outer diameter of the combustion chamber is smaller than the inner diameter of the cold air heating chamber.

[0008] As a preferred scheme of the utility model, the air outlet end of the combustion chamber is in a tapered structure with a reduced opening.

[0009] As a preferred embodiment of the present utility model, an air volume distributor is further provided in the cold air heating chamber. The air volume distributor is arranged at the front end of the combustion chamber, and part of the cold air flows to the combustion chamber after passing through the air volume distributor.

[0010] As a preferred embodiment of the present utility model, the air volume distributor includes torsion blades, a connecting shaft and distribution blades. The torsion blades are arranged on the side close to the blower, the distribution blades are arranged on the side close to the combustion chamber, one end of the connecting shaft is connected to the torsion blades and the other end is connected to the distribution blades. When the torsion blades are blown by the air flow of the blower, they can drive the distribution blades to rotate to adjust the effective area for ventilation.

[0011] As a preferred embodiment of the present utility model, the distribution blades include fixed blades and rotating blades. The fixed blades are fixedly connected to the ventilation section at the entrance of the combustion chamber, ventilation holes are provided on the fixed blades, the rotating blades are concentrically connected to the fixed blades and the rotating blades are connected to the connecting shaft. When the rotating blades rotate, they can change the blocking area of the ventilation holes.

[0012] As a preferred embodiment of the present utility model, the air volume distributor further includes a torsion return spring. The torsion return spring is sleeved on the connecting shaft, one end of which is connected to a fixed bracket and the other end is connected to the torsion blades.

[0013] Compared with the prior art, the present utility model has the following positive effects:

[0014] The portable high-pressure hot air blower provided by the present utility model includes a blower, a air supply pipe, a cold air heating chamber and a hot air ejection pipe. One end of the air supply pipe is connected to the air outlet of the blower and the other end is connected to the air inlet of the cold air heating chamber. The air outlet of the cold air heating chamber is connected to the hot air ejection pipe. The cold air blown by the blower is heated to high-temperature hot air in the cold air heating chamber and ejected from the hot air ejection pipe. When the portable high-pressure hot air blower of the present utility model is in use, it can be carried on the back by a single person and is mainly used for clearing relatively solid ice and snow in different occasions. It is particularly convenient for clearing ice and snow in railway turnouts, making the ice and snow clearing work easier and improving the work efficiency of ice and snow clearing. When clearing ice and snow, first use high-temperature hot air to melt the ice and snow that needs to be cleared in the railway turnout area, and the melted ice water is then blown away from the clearing area by the high-pressure and high-speed hot air flow, so as to achieve the purpose of clearing ice and snow. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 Structural schematic diagram of the portable high-pressure hot air blower of the present invention;

[0017] Figure 2 Schematic diagram of the air flow direction of the portable high-pressure hot air blower of the present invention;

[0018] Figure 3 Structural schematic diagram of the flame generator in the present invention;

[0019] Figure 4 Structural schematic diagram of the air volume distributor in the present invention;

[0020] Figure 5 Schematic diagram when the fixed blade and the rotating blade in the present invention overlap;

[0021] Figure 6 Schematic diagram after the rotating blade in the present invention rotates by an angle α relative to the fixed blade.

[0022] In the figure: 1, blower; 2, air supply pipe; 3, cold air heating bin; 4, hot air ejection pipe; 5, flame generator; 51, support connection frame; 52, fuel delivery pipeline; 53, electric pulse igniter; 54, combustion chamber; 55, fuel storage tank; 56, control valve; 57, power supply circuit; 6, air volume distributor; 61, torsion blade; 62, connecting shaft; 63, distribution blade; 631, rotating blade; 632, fixed blade; 633, ventilation hole; 64, torsion return spring; 65, fixed bracket. Detailed implementation manners

[0023] In the description of the present utility model, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] The following further describes in detail the specific embodiments of the present utility model with reference to the drawings.

[0026] Embodiment 1:

[0027] A portable high-pressure hot air blower provided in this embodiment, as Figures 1 - 6 shown, includes a blower 1, an air delivery pipe 2, a cold air heating chamber 3, and a hot air ejection pipe 4.

[0028] One end of the air delivery pipe 2 is connected to the air outlet of the blower 1 and the other end is connected to the air inlet of the cold air heating chamber 3. The air outlet of the cold air heating chamber 3 is connected to the hot air ejection pipe 4. The cold air blown by the blower 1 is heated to high-temperature hot air in the cold air heating chamber 3 and ejected from the hot air ejection pipe 4. The air delivery pipe 2 can be a flexible hose for convenient bending use.

[0029] Preferably, the portable high-pressure hot air blower is also provided with an operation handle (not marked), and the operation handle is connected to the outside of the blower 1 or the outside of the cold air heating chamber 3 for convenient operation during use.

[0030] When the portable high-pressure hot air blower of this embodiment is in use, it can be carried on the back by a single person and is mainly used for clearing relatively solid ice and snow in different scenarios. It is especially convenient for clearing ice and snow in railway turnouts, making the ice and snow clearing work easier and improving the work efficiency of ice and snow clearing. When clearing ice and snow, first use high-temperature hot air to melt the ice and snow that needs to be cleared in the railway turnout area, and the melted ice water is then blown away from the clearing area by the high-pressure and high-speed hot air flow, thus achieving the purpose of clearing ice and snow.

[0031] As a preferred embodiment, as Figure 3 shown, a flame generator 5 is provided in the cold air heating chamber 3. The flame generator 5 includes a combustion chamber 54, a fuel delivery pipeline 52, and an electric pulse igniter 53. The combustion chamber 54 is connected in the cold air heating chamber 3 through a support connection frame 51.

[0032] One end of the fuel delivery pipeline 52 is connected to the combustion chamber 54 and the other end is connected to a fuel storage tank 55 provided outside the cold air heating chamber 3. The fuel delivery pipeline 52 is used to deliver fuel to the combustion chamber 54, and the fuel can be gas or vaporized liquid fuel. Specifically, a control valve 56 is provided on the fuel delivery pipeline 52 to control the fuel flow rate.

[0033] One end of the electric pulse igniter 53 is connected to the combustion chamber 54 and the other end is connected to a power supply circuit 57. A power supply and a switch are provided on the power supply circuit 57 to control the ignition state of the electric pulse igniter 53.

[0034] The flame generator 5 in this embodiment always heats the cold air blown out by the blower to a predetermined temperature, so that high-temperature hot air is ejected from the nozzle of the hot air ejection pipe 4.

[0035] As Figure 2 shown, the cold air heating chamber 3 has a conical structure with a cylindrical shape in the middle and constricted openings at both ends.

[0036] As a preferred embodiment, the combustion chamber 54 is coaxially arranged with the cold air heating chamber 3, and the outer diameter of the combustion chamber 54 is smaller than the inner diameter of the cold air heating chamber 3. There is a gap between the outer wall of the combustion chamber 54 and the inner wall of the cold air heating chamber 3, so that part of the air flows through this gap and part of the air flows into the combustion chamber 54 to participate in combustion.

[0037] As a preferred embodiment, the air outlet end of the combustion chamber 54 has a constricted conical structure, so that the burning flame accelerates out to heat the outside air.

[0038] The combustion chamber 54 in this embodiment is a cylindrical cavity structure with an opening at the front end (air inlet end) and a conical nozzle at the end. On its side wall, a fuel delivery pipeline 52 and an electric pulse igniter 53 are respectively installed. When the combustion chamber 54 is working, air enters the combustion chamber from the air inlet end, mixes with the fuel transported into the combustion chamber 54 from the fuel input pipeline to form combustible gas, which is ignited by the electric pulse igniter, and the high-temperature flame generated during combustion sprays out from the conical nozzle of the combustion chamber.

[0039] When the portable high-pressure hot air blower in this embodiment is in use, most of the cold air blown out by the blower 1 directly flows through the annular space between the combustion chamber 54 and the cold air heating chamber 3 to the outlet position of the cold air heating chamber 3, as shown by the dotted line in the figure; a small part of the cold air enters the combustion chamber 54 from the air inlet end of the combustion chamber 54, forms a mixed combustible gas with the fuel entering the combustion chamber from the fuel delivery pipeline 52, and enters the combustion state after being ignited by the electric pulse igniter 53. Due to the continuous supply of fuel and air, a stable combustion flame is formed in the combustion chamber 54. After the continuously burning high-temperature flame sprays out from the combustion chamber 54, it mixes with the cold air that directly flows to the outlet of the combustion chamber 54 from the annular space between the combustion chamber 54 and the cold air heating chamber 3 to form high-temperature gas, which is sprayed out through the hot air spray pipe 4.

[0040] The working steps of the portable high-pressure hot air blower in this embodiment are as follows:

[0041] First step: Start the gasoline blower 1 and make it in the idle state;

[0042] Second step: Connect the fuel delivery pipeline 52 to inject fuel into the combustion chamber 54;

[0043] Third step: Use the electric pulse igniter 53 to ignite the mixed gas in the combustion chamber 54;

[0044] Fourth step: Gradually increase the throttle of the gasoline blower to increase the air volume of the blower to the required wind speed and air volume;

[0045] Fifth step: Adjust the fuel supply amount of the fuel delivery pipeline 52 to adjust the heat generated during combustion in the combustion chamber 54;

[0046] Sixth step: Align the high-temperature and high-pressure hot air spray pipe 4 to the part where ice and snow are to be removed, and the removal purpose can be gradually achieved.

[0047] As a preferred embodiment, an air volume distributor 6 is further provided in the cold air heating chamber 3. The air volume distributor 6 is arranged at the front end of the combustion chamber 54, and part of the air volume of the cold air flows to the combustion chamber 54 after passing through the air volume distributor 6.

[0048] The flame generator integrated in the cold air heating chamber 3 is equipped with an automatic air volume distributor, which can ensure that the flame generator burns stably and efficiently when the fan runs from the minimum wind speed to the maximum wind speed.

[0049] It should be noted that the basic condition for continuous and stable combustion in the combustion chamber is that the continuously supplied fuel and air have a specific mixing ratio. If the mixing ratio is too small or too large, a continuous and stable combustion condition in the combustion chamber cannot be guaranteed. Since the combustion chamber is fixedly arranged in the air duct of the gasoline fan, and the ventilation volume generated by the gasoline fan depends on the throttle position. The air volume is small at idle speed and gradually increases when the throttle is increased. The wind speed and air volume fluctuate violently. If no corresponding measures are taken, as the air volume in the air duct increases, the air volume entering the combustion chamber also increases, thus breaking the air-fuel mixing ratio that can produce stable combustion in the combustion chamber, and then resulting in combustion failure. The function of the air volume distributor in this embodiment is that as the air volume in the air duct gradually increases or decreases, it can ensure that the air volume entering the combustion chamber is stable at a specific value, so as to ensure that the air-fuel ratio in the combustion chamber is relatively fixed, and then obtain the stability of combustion.

[0050] As a preferred embodiment, as Figure 4 shown, the air volume distributor 6 includes a torsion blade 61, a connecting shaft 62 and a distribution blade 63. The torsion blade 61 is arranged on the side close to the fan 1, the distribution blade 63 is arranged on the side close to the combustion chamber 54, and one end of the connecting shaft 62 is connected to the torsion blade 61 and the other end is connected to the distribution blade 63. When the torsion blade 61 is blown by the airflow of the fan 1, it can drive the distribution blade 63 to rotate to adjust the effective area for ventilation. The connecting shaft 62 is coaxially arranged with the cold air heating chamber 3, and the connecting shaft 62 is rotatably connected to the cold air heating chamber 3 through a fixed bracket 65.

[0051] As a preferred embodiment, as Figure 5 and Figure 6As shown in the figure, the distribution vane 63 includes a fixed vane 632 and a rotating vane 631. The fixed vane 632 is fixedly connected to the ventilation section at the inlet of the combustion chamber 54. Ventilation holes 633 are provided on the fixed vane 632. The rotating vane 631 is concentrically connected to the fixed vane 632 and the rotating vane 631 is connected to the connecting shaft 62. When the rotating vane 631 rotates, it can change the blocking area of the ventilation holes 633, so as to change the effective ventilation area of the ventilation holes 633. Among them, the ventilation holes 633 are fan-shaped, and a plurality of fan-shaped ventilation holes 633 are provided. The plurality of ventilation holes 633 are evenly distributed around the center of the fixed vane 632. The shape of the rotating vane 631 is the same as that of the fixed vane 632. When the ventilation holes 633 on the rotating vane 631 are aligned with the ventilation holes 633 on the fixed vane 632, the effective ventilation area is the largest. When the ventilation holes 633 on the rotating vane 631 are misaligned with the ventilation holes 633 on the fixed vane 632, the effective ventilation area is reduced.

[0052] The distribution vane 63 in this embodiment is composed of two thin metal sheets with the same structural dimensions and symmetric fan-shaped ventilation holes. The two metal sheets are coaxially staggered by an angle and closely overlapped. By changing the relative angle of the two metal sheets, the ventilation area of the ventilation holes can be changed, thereby changing the air volume passing through them. Among them, the fixed vane 632 is fixed at the inlet of the combustion chamber and cannot rotate; the rotating vane 631 can rotate around the axis.

[0053] The torsion vane 61 in this embodiment is installed at the very front end of the entire cold air heating chamber. The cold air blown by the gasoline blower will push the torsion vane to rotate, and the torsion vane will push the rotating vane 631 to rotate by connecting with the rotating vane 631, so as to achieve the effect of changing the effective ventilation area of the air volume distributor to stabilize the air flow entering the combustion chamber.

[0054] As a preferred embodiment, the air volume distributor 6 further includes a torsion return spring 64. The torsion return spring is sleeved on the connecting shaft 62, one end of which is connected to the fixing hole on the fixed bracket 65 and the other end is connected to the torsion vane 61.

[0055] In this embodiment, the working process of the torsion blade is as follows. When the torsion blade is blown by the airflow from the gasoline blower, the torque generated due to the designed angle of the blade will cause the torsion blade to rotate clockwise. When the torque generated by the airflow blowing the torsion blade reaches equilibrium with the reverse torsion of the torsion return spring installed coaxially, the torsion blade will stay at the corresponding angle. The magnitude of the angle by which the torsion blade rotates depends on the wind force of the gasoline blower. When the wind force is large, the angle by which the torsion blade rotates clockwise is large; when the wind force decreases, the torsion blade will rotate counterclockwise under the action of the spring. The clockwise or counterclockwise rotation of the torsion blade will drive the rotating blade 631 of the air volume distributor coaxially connected thereto to change the effective area of the fan-shaped ventilation holes, thereby achieving the purpose of regulating the air flow into the combustion chamber.

[0056] The torsion blade can be two or more pieces. However, in order to reduce the excessive wind resistance generated by the torsion blade, a two-piece structure is adopted in this embodiment.

[0057] The above are only the preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art of this technology can make several deformations and improvements without departing from the creative concept of the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. A portable high-pressure hot air blower, characterized in that, It includes a fan (1), a supply air duct (2), a cold air heating chamber (3) and a hot air ejection duct (4). One end of the supply air duct (2) is connected to the air outlet of the fan (1), and the other end is connected to the air inlet of the cold air heating chamber (3). The air outlet of the cold air heating chamber (3) is connected to the hot air ejection duct (4). The cold air blown by the fan (1) is heated to high-temperature hot air in the cold air heating chamber (3) and ejected from the hot air ejection duct (4).

2. The portable high-pressure hot air blower according to claim 1, characterized in that, A flame generator (5) is arranged in the cold air heating chamber (3). The flame generator (5) includes a combustion chamber (54), a fuel delivery pipeline (52) and an electric pulse igniter (53). One end of the fuel delivery pipeline (52) is connected to the combustion chamber (54), and the other end is connected to a fuel storage tank (55) arranged outside the cold air heating chamber (3). One end of the electric pulse igniter (53) is connected to the combustion chamber (54), and the other end is connected to a power supply circuit (57).

3. The portable high-pressure hot air blower according to claim 2, characterized in that, The combustion chamber (54) is coaxially arranged with the cold air heating chamber (3), and the outer diameter of the combustion chamber (54) is smaller than the inner diameter of the cold air heating chamber (3).

4. The portable high-pressure hot air blower according to claim 2, characterized in that, The air outlet end of the combustion chamber (54) is in a tapered structure with a constricted opening.

5. The portable high-pressure hot air blower according to claim 2, wherein, An air volume distributor (6) is also arranged in the cold air heating chamber (3). The air volume distributor (6) is arranged at the front end of the combustion chamber (54). After the cold air passes through the air volume distributor (6), part of the air volume flows towards the combustion chamber (54).

6. The portable high-pressure hot air blower according to claim 5, wherein, The air volume distributor (6) includes a torsion blade (61), a connecting shaft (62) and a distribution blade (63). The torsion blade (61) is arranged on the side close to the fan (1), and the distribution blade (63) is arranged on the side close to the combustion chamber (54). One end of the connecting shaft (62) is connected to the torsion blade (61), and the other end is connected to the distribution blade (63). When the torsion blade (61) is blown by the air flow of the fan (1), it can drive the distribution blade (63) to rotate to adjust the effective area for ventilation.

7. A portable high-pressure hot air blower according to claim 6, characterized in that, The distribution blade (63) includes a fixed blade (632) and a rotating blade (631). The fixed blade (632) is fixedly connected to the ventilation section at the entrance of the combustion chamber (54). Ventilation holes (633) are arranged on the fixed blade (632). The rotating blade (631) is concentrically connected to the fixed blade (632) and the rotating blade (631) is connected to the connecting shaft (62). When the rotating blade (631) rotates, it can change the blocking area of the ventilation holes (633).

8. A portable high-pressure hot air blower according to claim 6, characterized in that, The air volume distributor (6) also includes a torsion return spring. The torsion return spring is sleeved on the connecting shaft (62), and one end of it is connected to a fixed bracket (65), and the other end is connected to the torsion blade (61).

Images