Coal mine air circulation device

Abstract

This utility model discloses an underground coal mine air circulation device, including a drive housing. An inlet volute and an outlet volute are fixedly connected to both ends of the drive housing. The drive housing, inlet volute, and outlet volute are mounted on a chassis. Impellers are installed inside both the inlet and outlet volutes, and the impellers are fixed to both ends of a rotating shaft that passes horizontally through the drive housing. The chassis has grooves for accommodating the drive housing, inlet volute, and outlet volute, and rollers are installed at the bottom of the chassis. This utility model provides an underground coal mine air circulation device that not only solves the problems of large size and difficult deployment of traditional air circulation equipment, but also addresses the problem of low air renewal rate in underground coal mines.

Description

Technical Field

[0001] This utility model relates to an air circulation device for underground coal mines, belonging to the field of air circulation technology. Background Technology

[0002] Coal mine underground mining operations are generally located at a relatively deep location below the ground. In order to ensure the safety and normal work of underground workers, it is necessary not only to continuously supply fresh air to the underground to ensure the workers' normal breathing, but also to use the underground ventilation system to exhaust the polluted air generated underground from the working space.

[0003] CN202420397410.3 discloses an underground air circulation device for coal mines, including a coal mine shaft body, a mounting plate, an exhaust gas extraction component, an air purification component, and an air filter discharge component. This invention uses the exhaust gas extraction component to draw air from inside the coal mine shaft body, the air purification component to purify the air inside the shaft body for efficient air purification and discharge, and the air filter discharge component to filter fresh air before introducing it into the shaft body, thereby reducing potential hazards for construction workers.

[0004] The air circulation devices disclosed in the aforementioned patent documents, as well as other existing air circulation devices, still have the following technical problems, based on practical experience:

[0005] 1. The common use of independent intake and exhaust fans results in problems such as large size of air circulation equipment, difficulty in decentralized installation, inconvenient transportation, and low efficiency in mobile deployment in narrow alleys.

[0006] 2. The different flow rates during the fresh air intake and stale air exhaust processes result in a low air renewal rate in coal mines.

[0007] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0008] This invention addresses the shortcomings of the prior art by providing an underground coal mine air circulation device, which not only solves the problems of large size and difficult mobile deployment of traditional air circulation equipment, but also solves the problem of low air renewal rate in underground coal mines.

[0009] To solve the above technical problems, the present invention adopts the following technical solution:

[0010] An underground coal mine air circulation device includes a drive housing, with an inlet volute and an outlet volute fixedly connected to both ends of the drive housing. The drive housing, inlet volute, and outlet volute are mounted on a chassis. Impellers are installed inside both the inlet and outlet volutes, and the impellers are fixedly connected to both ends of a rotating shaft. The rotating shaft passes horizontally through the inside of the drive housing. The chassis is provided with grooves for placing the drive housing, inlet volute, and outlet volute, and rollers are installed at the bottom of the chassis.

[0011] Furthermore, a support cylinder is fitted onto the main body of the rotating shaft, and the support cylinder is connected to the rotating shaft by two bearings arranged on the left and right sides.

[0012] Furthermore, the support cylinder is fixedly connected to the inside of the drive housing, and flanges are provided on both the outside of the support cylinder and the inside of the drive housing. The outer flange of the support cylinder and the inner flange of the drive housing are fixedly connected by bolts.

[0013] Furthermore, a motor coil stator is fixedly installed on the main body of the rotating shaft, and a motor rotor is sleeved around the motor coil stator. The motor rotor is fixedly connected to the inside of the turntable, and the turntable is fixedly connected to the rotating shaft.

[0014] Furthermore, the end of the air intake volute away from the drive housing is provided with a first air intake port, and a first air intake pipe is installed on the first air intake port.

[0015] Furthermore, the side of the air intake volute is provided with a first air outlet, and a first air outlet pipe is installed on the first air outlet.

[0016] Furthermore, a second air inlet is provided at the end of the air outlet volute away from the drive housing, and a second air inlet pipe is installed on the second air inlet.

[0017] Furthermore, a second air outlet is provided on the side of the air outlet volute, and a second air outlet pipe is installed on the second air outlet.

[0018] Furthermore, the first air inlet pipe, the first air outlet pipe, the second air inlet pipe, and the second air outlet pipe are all provided with corrugated sections.

[0019] Furthermore, the inlet end of the first air inlet pipe and the outlet end of the second air outlet pipe are both located outside the coal mine, while the outlet end of the first air outlet pipe and the inlet end of the second air inlet pipe are both located inside the coal mine, and a trumpet-shaped flow guide is provided on the outlet end of the first air outlet pipe and the inlet end of the second air inlet pipe.

[0020] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0021] This utility model adopts a highly integrated design, integrating the drive housing, air intake volute, and air outlet volute onto a movable chassis. The structure is compact, saves space, and is easy to move in harsh underground environments, solving the problems of large size and difficult deployment of traditional ventilation equipment.

[0022] In this invention, the motor synchronously drives the impellers inside the inlet and outlet volutes to rotate at high speed, enabling simultaneous pumping of two air paths and significantly improving the air renewal rate in coal mines. The intake of fresh air and the discharge of polluted air are carried out synchronously and in equal quantities, avoiding airflow short circuits or circulation dead zones, and forming a more efficient and complete air circulation.

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0026] Figure 3 This is a structural diagram of the intake volute, drive housing, and exhaust volute.

[0027] In the diagram, 1-drive housing, 2-intake volute, 3-outtake volute, 4-chassis, 5-groove, 6-first intake port, 7-first intake pipe, 8-first outlet, 9-first outlet pipe, 10-second intake port, 11-second intake pipe, 12-second outlet, 13-second outlet pipe, 14-impeller, 15-rotating shaft, 16-bearing, 17-support cylinder, 18-motor coil stator, 19-motor rotor, 20-turntable, 21-roller. Detailed Implementation

[0028] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0029] like Figures 1-3 As shown in the figure, this utility model provides an underground air circulation device for coal mines, including a drive housing 1. An air inlet volute 2 and an air outlet volute 3 are fixedly connected to both ends of the drive housing 1. The drive housing 1, the air inlet volute 2, and the air outlet volute 3 are installed on the top of the chassis 4. An impeller 14 is installed inside the air inlet volute 2 and the air outlet volute 3. The impeller 14 is fixedly connected to both ends of a rotating shaft 15. The rotating shaft 15 passes through the drive housing 1 in a horizontal direction.

[0030] The chassis 4 is provided with a groove 5 for mounting the drive housing 1, the air intake housing 2, and the air outlet housing 3.

[0031] The bottom of the chassis 4 is equipped with rollers 21, which facilitates the repositioning of the entire device.

[0032] A support cylinder 17 is sleeved on the main body of the rotating shaft 15. The support cylinder 17 is connected to the rotating shaft 15 through two bearings 16 arranged on the left and right. The support cylinder 17 provides rotational support for the rotating shaft 15.

[0033] The support cylinder 17 is fixedly connected to the inside of the drive housing 1. Flanges for connection are provided on both the outside of the support cylinder 17 and the inside of the drive housing 1. The outer flange of the support cylinder 17 is fixedly connected to the inner flange of the drive housing 1 by bolts.

[0034] A motor coil stator 18 is fixedly installed on the main body of the rotating shaft 15. A motor rotor 19 is sleeved around the motor coil stator 18. The motor rotor 19 is fixedly connected to the inside of the turntable 20. The turntable 20 is fixedly connected to the rotating shaft 15.

[0035] A stable current flows through the motor coil stator 18, which generates a magnetic field force to drive the motor rotor 19 to rotate. The motor rotor 19 then drives the turntable 20 and the rotating shaft 15 to rotate in sequence.

[0036] The intake volute 2 is provided with a first air inlet 6 at the end away from the drive housing 1, and a first air inlet pipe 7 is installed on the first air inlet 6.

[0037] The air intake volute 2 has a first air outlet 8 on its side, and a first air outlet pipe 9 is installed on the first air outlet 8.

[0038] The air outlet volute 3 is provided with a second air inlet 10 at the end away from the drive housing 1, and a second air inlet pipe 11 is installed on the second air inlet 10.

[0039] The side of the air outlet volute 3 is provided with a second air outlet 12, and a second air outlet pipe 13 is installed on the second air outlet 12.

[0040] The first air inlet pipe 7, the first air outlet pipe 9, the second air inlet pipe 11, and the second air outlet pipe 13 are all provided with corrugated sections, which can flexibly adjust the laying path of the pipeline.

[0041] The inlet end of the first air inlet pipe 7 and the outlet end of the second air outlet pipe 13 are both located outside the coal mine, while the outlet end of the first air outlet pipe 9 and the inlet end of the second air inlet pipe 11 are both located inside the coal mine. The outlet end of the first air outlet pipe 9 and the inlet end of the second air inlet pipe 11 are both equipped with a trumpet-shaped flow guide.

[0042] The specific working principle of this utility model is as follows:

[0043] In this invention, the motor synchronously drives the impellers inside the inlet and outlet volutes to rotate at high speed, enabling simultaneous pumping of two air paths. This pumps fresh air from outside the coal mine into the mine while simultaneously pumping polluted air from inside the mine to the outside, thus achieving air circulation in the coal mine. The simultaneous pumping of two air paths significantly improves the air renewal rate in the coal mine.

[0044] The drive housing, intake volute, and exhaust volute are all integrated on a movable chassis, which facilitates relocation in harsh underground environments and solves the problems of large size and difficult deployment of traditional ventilation equipment.

[0045] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. An underground air circulation device for coal mines, characterized in that: The system includes a drive housing (1), with an intake volute (2) and an exhaust volute (3) fixedly connected to both ends of the drive housing (1). The drive housing (1), intake volute (2), and exhaust volute (3) are mounted on the chassis (4). Impellers (14) are installed inside the intake volute (2) and the exhaust volute (3). The impellers (14) are fixedly connected to both ends of a rotating shaft (15). The rotating shaft (15) passes through the drive housing (1) in a horizontal direction. The chassis (4) is provided with a groove (5) for placing the drive housing (1), intake volute (2), and exhaust volute (3). Rollers (21) are installed at the bottom of the chassis (4).

2. The underground air circulation device as described in claim 1, characterized in that: A support cylinder (17) is sleeved on the main body of the rotating shaft (15), and the support cylinder (17) is connected to the rotating shaft (15) by two bearings (16) arranged on the left and right.

3. The underground air circulation device as described in claim 2, characterized in that: The support cylinder (17) is fixed inside the drive housing (1). Flanges are provided on both the outside of the support cylinder (17) and the inside of the drive housing (1). The outer flange of the support cylinder (17) is fixedly connected to the inner flange of the drive housing (1) by bolts.

4. The underground air circulation device as described in claim 1, characterized in that: A motor coil stator (18) is fixedly installed on the main body of the rotating shaft (15). A motor rotor (19) is sleeved around the motor coil stator (18). The motor rotor (19) is fixedly connected to the inside of the turntable (20). The turntable (20) is fixedly connected to the rotating shaft (15).

5. The underground air circulation device as described in claim 1, characterized in that: The intake volute (2) is provided with a first air inlet (6) at the end away from the drive housing (1), and a first air inlet pipe (7) is installed on the first air inlet (6).

6. The underground air circulation device as described in claim 5, characterized in that: The air intake volute (2) has a first air outlet (8) on its side, and a first air outlet pipe (9) is installed on the first air outlet (8).

7. The underground air circulation device as described in claim 6, characterized in that: The air outlet volute (3) is provided with a second air inlet (10) at the end away from the drive housing (1), and a second air inlet pipe (11) is installed on the second air inlet (10).

8. The underground air circulation device as described in claim 7, characterized in that: The air outlet volute (3) is provided with a second air outlet (12) on its side, and a second air outlet pipe (13) is installed on the second air outlet (12).

9. The underground air circulation device as described in claim 8, characterized in that: The first air inlet pipe (7), the first air outlet pipe (9), the second air inlet pipe (11) and the second air outlet pipe (13) are all provided with corrugated sections.

10. The underground air circulation device as described in claim 9, characterized in that: The inlet end of the first air inlet pipe (7) and the outlet end of the second air outlet pipe (13) are both located outside the coal mine. The outlet end of the first air outlet pipe (9) and the inlet end of the second air inlet pipe (11) are both located inside the coal mine. The outlet end of the first air outlet pipe (9) and the inlet end of the second air inlet pipe (11) are both equipped with a trumpet-shaped guide shroud.

Images