Mining motor-free pneumatic fan

Abstract

The utility model belongs to the technical field of fans, and particularly relates to a mining motor-free pneumatic fan which comprises a pneumatic fan body and an air return base, the pneumatic fan body comprises fan blades, a pneumatic rotor, a shell, an air inlet pipe and an air return pipe, the fan blades are connected to one end of the pneumatic rotor, the pneumatic rotor is arranged in the shell in a penetrating mode and rotationally connected with the shell, and the air inlet pipe is connected with the air return pipe. The air inlet pipe is arranged on the side wall of the shell and communicated with the interior of the shell, the air return pipe is arranged on the lower portion of the shell and communicated with the interior of the shell, the air return base comprises an air return barrel and a support, the support is arranged in the air return barrel, and the lower portion of the air return pipe is connected with the support. The arranged air return pipe is matched with the air return barrel so that air exhausted from the shell can be reutilized, air flow is driven upwards by fan blades through the air return barrel, and therefore the air force of the fan is enhanced, and meanwhile after water is added into the air return barrel, noise generated by air exhaust of the air return pipe can be reduced; meanwhile, after water is added into the barrel, airflow blown out by the fan is more humid, and the cooling effect is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, in particular to a motor-free pneumatic fan for mining. Background Art

[0002] Fan, as a common electrical appliance, plays an important role in our lives. The working principle of the fan is to use an electric motor to drive the blades to rotate, thereby generating air flow, and the air takes away the heat from the human body surface, thereby achieving a cooling effect.

[0003] For example, a shaking head electric fan disclosed in the utility model patent with the authorized patent announcement number CN210127960U is used, which includes a base, a column, a fan head frame and a fan head. The fan head frame includes a first shell and a first U-shaped frame therein, the first U-shaped frame is made of metal material, and left and right shaking head components are installed between the first U-shaped frame and the column, and the second U-shaped frame is installed with a fan blade motor, a mounting plate and a circuit control board. The fan is driven by a traditional motor, but in engineering construction such as mine tunnels, fans are generally set in the working area to allow workers to work in the wind, thereby preventing underground workers from inhaling dust and improving the stuffy environment underground. In order to increase the wind force and ventilate and dissipate heat in the working area, a larger power motor is required, and a large power motor is prone to heat. At the same time, if the circuit load is large, it is easy to cause circuit safety hazards. Therefore, a convenient mine-use motorless pneumatic fan that can solve the cooling of the working environment in the mine is needed. Summary of the invention

[0004] In view of the above problems, the utility model proposes a motorless pneumatic fan for mining, which effectively solves the problem in the prior art that underground workers have a poor working environment and need high-power fans, but high-power motors are prone to heat up and cause circuit loads, which can easily create circuit safety hazards.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a motor-free pneumatic fan for mining, comprising a pneumatic fan and a return air base, the pneumatic fan comprising fan blades, a pneumatic rotor, a casing, an air inlet duct and a return air duct, the fan blades are connected to one end of the pneumatic rotor, the pneumatic rotor is penetrated in the casing and rotatably connected to the casing, the air inlet duct is arranged on the side wall of the casing and communicated with the interior of the casing, the return air duct is arranged at the lower part of the casing and communicated with the interior of the casing, the return air base comprises a return air barrel and a bracket, the bracket is arranged in the return air barrel, and the lower part of the return air duct is connected to the bracket.

[0006] Furthermore, the pneumatic rotor includes a rotating shaft and a flywheel. A shaft sleeve is fixedly installed inside the shell. The rotating shaft passes through the shaft sleeve and is rotatably connected to the shaft sleeve. The flywheel sleeve is arranged on the rotating shaft and is connected to the rotating shaft key.

[0007] Furthermore, bearing holes are formed at both ends of the shaft sleeve, bearings are arranged in the bearing holes, and both ends of the rotating shaft are inserted into the inner rings of the bearings.

[0008] Furthermore, a retaining ring groove is provided on the outer side of the bearing hole, and a retaining ring is installed in the retaining ring groove.

[0009] Furthermore, the return air duct includes a fixed pipe and a joint pipe, the fixed pipe is fixedly connected to the bracket, the joint pipe is arranged on the lower side of the shell, and the lower end of the joint pipe is detachably connected to the upper end of the fixed pipe.

[0010] Furthermore, the number of blades of the fan blade is an odd number.

[0011] Furthermore, the outer cover of the fan blade is provided with a protective net, and the protective net is connected to the outer shell.

[0012] Furthermore, a bottom plate is connected to the lower side of the return air barrel.

[0013] Furthermore, a handle is provided on the side of the return air barrel.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model can be connected to an air supply device such as an air compressor, and the pneumatic rotor is rotated by compressed air to drive the fan blades, without any circuit safety hazards;

[0016] At the same time, the return air duct and the return air barrel can be used to recycle the air discharged from the shell. The air flow is driven upward by the fan blades through the return air barrel, thereby enhancing the fan wind force.

[0017] At the same time, adding water to the return air barrel can reduce the noise generated by the exhaust of the return air duct. At the same time, after adding water to the barrel, the air flow blown out by the fan will be more humid and the cooling effect will be better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 2 for Figure 1 A magnified view of the structure of the middle part A;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the return air barrel.

[0021] In the figure: 1. fan blades; 2. pneumatic rotor; 21. rotating shaft; 22. flywheel; 3. outer casing; 31. bushing; 4. air inlet pipe; 5. return air pipe; 51. fixing pipe; 52. joint pipe; 6. return air barrel; 7. bracket; 8. bearing; 9. retaining spring; 10. protective net; 11. bottom plate; 12. handle. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-Figure 3 As shown, a motor-free pneumatic fan for mining includes a pneumatic fan and a return air base, the pneumatic fan includes a fan blade 1, a pneumatic rotor 2, a shell 3, an air inlet pipe 4 and a return air pipe 5, the fan blade 1 is connected to one end of the pneumatic rotor 2, the shell 3 is an internal hollow cylindrical structure, so that the compressed air entering the air inlet pipe 4 can drive the pneumatic rotor 2 to rotate while rotating in accordance with the inner wall of the shell 3, and it is not easy to generate turbulence that affects the rotation of the pneumatic rotor 2, a circular hole is opened at the center of the axis of the shell 3, the pneumatic rotor 2 passes through the circular hole and is rotatably connected to the shell 3, the air inlet pipe 4 is welded and arranged on the side wall of the shell 3 and is connected with the interior of the shell 3, the return air pipe 5 is welded to the lower part of the shell 3 and is connected with the interior of the shell 3, the return air base includes a return air barrel 6 and a bracket 7, the bracket 7 is arranged in the return air barrel 6, the bracket 7 is a plurality of support plates welded around the inner wall of the return air barrel 6, and the lower part of the return air pipe 5 is welded and connected with the plurality of support plates.

[0024] In this embodiment, the pneumatic rotor 2 includes a rotating shaft 21 and a flywheel 22. A shaft sleeve 31 is arranged inside the outer shell 3. The central axis of the shaft sleeve 31 is consistent with the central axis of the outer shell 3. The outer wall of the shaft sleeve 31 is welded and fixed to the inner wall of the outer shell 3 by an additional welding plate. The shaft sleeve 31 is provided with an axial hole. The rotating shaft 21 passes through the axial hole and is rotatably connected to the shaft sleeve 31. The flywheel 22 is sleeved on the end of the rotating shaft 21 away from the fan blade 1. The outer wall of the rotating shaft 21 is provided with a flat key, and the inner wall of the flywheel 22 is provided with a keyway. The keyway on the inner wall of the flywheel 22 cooperates with the flat key on the rotating shaft 21 to form a key connection. The flywheel 22 is arranged close to the air inlet pipe 4 and is connected to the air compressor through the air inlet pipe 4, so that the compressed air blows the flywheel 22 to drive the rotating shaft 21 to rotate.

[0025] In this embodiment, bearing holes are formed at both ends of the shaft sleeve 31 , bearings 8 are disposed in the bearing holes, and both ends of the rotating shaft 21 are inserted into the inner rings of the bearings 8 .

[0026] In this embodiment, a retaining ring groove is provided on the outer side of the bearing hole and is located on the inner wall of the bearing hole. A retaining ring 9 is installed in the retaining ring groove.

[0027] In this embodiment, the return air duct 5 includes a fixed pipe 51 and a joint pipe 52. The lower part of the fixed pipe 51 is welded and fixed to the bracket 7. The joint pipe 52 is arranged on the lower side of the shell 3. The upper part of the fixed pipe 51 is provided with a threaded joint. The outer wall of the joint pipe 52 is provided with an external thread. The lower end of the joint pipe 52 and the upper end of the fixed pipe 51 are detachably connected through the threaded joint, so that the equipment can be disassembled during transportation for easy storage. At the same time, the simple connection structure facilitates quick assembly and use.

[0028] In this embodiment, the number of blades of the fan blade 1 is an odd number. An odd number of blades runs more smoothly and is less likely to vibrate. It is preferred to use a three-blade fan to reduce the weight of the device itself and facilitate transportation.

[0029] In this embodiment, the outer cover of the fan blade 1 is provided with a protective net 10, and an integrated connecting plate is welded to the rear of the protective net 10. The connecting plate is fixedly connected to the outer shell 3 by screws. The protective net 10 is provided to prevent the fan blade 1 from causing harm to the human body during the rotation of the fan blade 1, and at the same time prevent the fan blade 1 from touching hard objects and causing damage to the fan blade 1.

[0030] In this embodiment, a bottom plate 11 is welded to the lower side of the return air barrel 6 to increase the contact area between the bottom of the return air barrel 6 and the ground, so that the return air barrel 6 can be placed on the flat ground more stably.

[0031] In this embodiment, a handle 12 is provided on the side of the return air barrel 6 . There are two handles 12 , and the two handles 12 are symmetrically welded to the side wall of the return air barrel 6 .

[0032] When the utility model is in use, the air inlet pipe 4 is connected to the air compressor through a pipeline, the air compressor is started, and the high-pressure air enters the interior of the shell 3 through the air inlet pipe 4. Affected by the high-pressure air, the flywheel 22 rotates while driving the rotating shaft 21 and the fan blades 1 to rotate. At the same time, a part of the high-pressure air enters the return air barrel 6 through the return air pipe 5, touches the barrel wall of the return air barrel 6 and changes the wind direction upward. At this time, the fan blades 1 rotate to accelerate the air flow rate of the upper part of the return air barrel 6, and a part of the high-pressure air is driven by the fan blades 1 to be blown forward. At the same time, if water is added to the return air barrel 6, the water covers the lower end of the return air pipe 5. At this time, the wind noise generated during the operation can be reduced. At the same time, the fan blades 1 rotate to reduce the upper pressure of the return air barrel 6, thereby driving the air moistened with water in the wind barrel 6 to be blown forward, thereby increasing the air humidity and further improving the cooling effect.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A motorless pneumatic fan for mining, comprising a pneumatic fan and a return air base, characterized in that: The pneumatic fan includes fan blades, a pneumatic rotor, a shell, an air inlet duct and a return air duct, the fan blades are connected to one end of the pneumatic rotor, the pneumatic rotor is inserted into the shell and is rotatably connected to the shell, the air inlet duct is arranged on the side wall of the shell and is connected to the interior of the shell, the return air duct is arranged at the lower part of the shell and is connected to the interior of the shell, the return air base includes a return air barrel and a bracket, the bracket is arranged in the return air barrel, and the lower part of the return air duct is connected to the bracket.

2. The motorless pneumatic fan for mining according to claim 1, characterized in that: The pneumatic rotor comprises a rotating shaft and a flywheel. A shaft sleeve is fixedly installed inside the housing. The rotating shaft passes through the shaft sleeve and is rotatably connected to the shaft sleeve. The flywheel sleeve is arranged on the rotating shaft and is connected to the rotating shaft key.

3. The motorless pneumatic fan for mining according to claim 2, characterized in that: The two ends of the shaft sleeve are provided with bearing holes, bearings are arranged in the bearing holes, and the two ends of the rotating shaft are inserted into the inner rings of the bearings.

4. The motorless pneumatic fan for mining according to claim 3, characterized in that: The outer sides of the bearing holes are all provided with retaining ring grooves, and retaining rings are installed in the retaining ring grooves.

5. The motorless pneumatic fan for mining according to claim 1, characterized in that: The return air duct includes a fixed pipe and a joint pipe, the fixed pipe is fixedly connected to the bracket, the joint pipe is arranged on the lower side of the shell, and the lower end of the joint pipe is detachably connected to the upper end of the fixed pipe.

6. The motorless pneumatic fan for mining according to claim 1, characterized in that: The fan blades have an odd number of blades.

7. The motorless pneumatic fan for mining according to claim 1, characterized in that: The outer cover of the fan blade is provided with a protective net, and the protective net is connected to the outer shell.

8. The motorless pneumatic fan for mining according to claim 1, characterized in that: The lower side of the return air barrel is connected with a bottom plate.

9. The motorless pneumatic fan for mining according to claim 1, characterized in that: A handle is provided on the side of the return air barrel.

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