Mine main ventilator structure arranged in underground ventilation system

Abstract

The invention provides a mine main ventilator structure arranged in an underground ventilation system, and relates to the technical field of mine ventilation equipment.The mine main ventilator structure comprises a fan outer barrel and a fan room, an air door is arranged at the air inlet end of the fan outer barrel, and a brake and a grounding control box are fixedly installed in the fan room; an air inlet and an air outlet of the fan outer barrel both extend to the outside of the fan room, the fan outer barrel and the fan room are connected in a sealed mode, a fan inner barrel is fixedly installed in the fan outer barrel through a connecting part, a motor is fixedly installed in the fan inner barrel, and an air duct is arranged between the fan inner barrel and the fan outer barrel. The fan main body is arranged in the fan room, and the inlet and the outlet of the fan main body are connected with the ventilation pipelines in front of and behind the fan room, so that underground waste gas is prevented from leaking into the fan room, the fan room is always clean, and workers can conveniently enter the fan room at any time to inspect and maintain the fan and auxiliary facilities of the fan.

Description

Technical Field

[0001] The invention relates to the technical field of mine ventilation equipment, in particular to a mine main fan structure arranged in an underground ventilation system. Background Art

[0002] Mine ventilation refers to the introduction of fresh air into the mine to increase the oxygen concentration to dilute and remove toxic, harmful gases and dust in the mine. The basic tasks of mine ventilation are: to supply enough fresh air underground to meet the needs of personnel for oxygen; to dilute harmful gases and dust underground to ensure safe production; to regulate the underground climate to create a good working environment. In order to make the underground airflow flow along the designated route, it is necessary to build structures to guide and control the airflow in certain tunnels, namely ventilation facilities. It is divided into facilities for guiding airflow and blocking airflow. The main equipment for mine ventilation is the fan.

[0003] The current arrangement of fans for mine ventilation includes placing the motor and its foundation directly in front of the fan inlet, and the air inlet end of the fan body is directly arranged inside the fan room (the area where the fan is located), so that the air inlet end of the fan body does not contact the air inlet side of the fan room. The above arrangement has the following disadvantages:

[0004] First, the motor and its foundation are placed directly in front of the fan inlet, causing the motor and its foundation to directly block the flow field at the fan inlet, resulting in a significant reduction in fan efficiency;

[0005] Secondly, since there are a lot of dust particles in the exhaust gas from underground pipelines, the above arrangement will easily cause the exhaust gas from underground to be drawn into the fan room (the area where the fan is located) during the operation of the fan. The workers are polluted by the environment of the fan room and cannot perform normal inspections and maintenance on other auxiliary facilities arranged in the fan room, including but not limited to dampers, oil stations, brakes and their control boxes. In the long run, it will seriously affect the safe and stable operation and service life of the fan;

[0006] Thirdly, since the fan body is arranged inside the fan room and the air inlet end of the fan body does not contact the air inlet of the fan room, the exhaust gas from the underground pipeline enters the fan room first, and then the fan discharges it from the fan room to the next section of the ventilation duct, causing the fan room to become a component of the entire ventilation system duct. Since the cross-sectional area of ​​the fan room is several times the cross-sectional area of ​​the air duct in front of the fan inlet, and the dynamic pressure loss is in the square relationship of the two cross-sectional area multiples, the above-mentioned air duct "relay" mode will cause dynamic pressure loss, which will seriously reduce the operating efficiency of the ventilation system. Summary of the invention

[0007] 1. Technical issues to be solved

[0008] In view of the deficiencies in the prior art, the present invention provides a main mine fan structure arranged in an underground ventilation system, which solves the problem that the motor and its foundation directly block the flow field at the fan inlet, causing a significant reduction in the fan efficiency. At the same time, there are also problems such as difficulty in inspection and maintenance, which seriously affects the safe and stable operation and service life of the fan, and the cross-sectional area of ​​the fan room is several times the cross-sectional area of ​​the air duct in front of the fan inlet, resulting in dynamic pressure loss, which will seriously reduce the operating efficiency of the ventilation system.

[0009] (II) Technical solution

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions: a mine main ventilation fan structure arranged in an underground ventilation system, comprising a fan outer cylinder and a fan room, the left wall of the fan room is provided with an air inlet and the right wall is provided with an air outlet, the air inlet end of the fan outer cylinder is provided with a damper, a brake and a grounding control box are fixedly installed inside the fan room, a cement air duct is fixedly connected to the outside of the fan room and at a position corresponding to the air inlet and the air outlet, and the air inlet and the air outlet of the fan outer cylinder are sealed and connected to the air inlet and the air outlet of the fan room;

[0011] A fan inner cylinder is fixedly installed inside the fan outer cylinder through a connecting component, a motor is fixedly installed inside the fan inner cylinder, an air duct is provided between the fan inner cylinder and the fan outer cylinder, a transmission shaft is fixedly connected to the output end of the motor, and an impeller is fixedly connected to the output end of the transmission shaft away from the motor.

[0012] Furthermore, slide rails are symmetrically fixedly installed on the ground of the fan room, and pulleys are installed at the bottom of the fan outer cylinder, and the pulleys cooperate with the slide rails.

[0013] Furthermore, the transmission shaft is located in a closed inner cylinder of the fan.

[0014] Furthermore, the motor is located on a side close to an air outlet end of an outer cylinder of the fan, and the impeller is located on a side close to an air inlet end of an outer cylinder of the fan.

[0015] Furthermore, the transmission shaft and the fan outer cylinder are coaxially arranged, and the fan outer cylinder and the fan inner cylinder are concentrically arranged.

[0016] Furthermore, the impeller is composed of a hub and blades, the blades are fixed on the radial side surface of the hub, the blades are located in the air duct, and the fan inner cylinder is in sealing contact with the axial side surface of the hub.

[0017] Furthermore, an oil station is fixedly installed inside the fan room.

[0018] Furthermore, a bearing box is provided between the transmission shaft and the impeller, and the bearing box can overcome bidirectional axial forces.

[0019] (III) Beneficial effects

[0020] The present invention provides a mine main ventilator structure arranged in an underground ventilation system. It has the following beneficial effects:

[0021] 1. In this scheme, the fan body is arranged in the fan room, and the inlet and outlet of the fan body are connected to the ventilation ducts in front and behind the fan room, ensuring that the underground exhaust gas will not leak into the fan room, ensuring that the fan room is always clean, and facilitating the staff to enter the fan room at any time to inspect and maintain the fan and its auxiliary facilities.

[0022] 2. In this solution, by directly placing the motor in the inner barrel of the fan, the operating efficiency of the fan and the ventilation system will not be affected or reduced.

[0023] 3. In this solution, the underground exhaust gas is directly pressurized by the fan and sent to the next section of the air duct, avoiding the dynamic pressure loss through the fan room and greatly improving the operating efficiency of the ventilation system.

[0024] 4. In this solution, by ensuring that the flow field in front of the fan inlet is unobstructed, the fan efficiency is much higher than the motor external fan structure in the prior art.

[0025] 5. In this solution, by arranging auxiliary facilities such as motors, oil stations, dampers and brakes and local control boxes in the fan room, its lifespan, operational safety and stability are better than the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A front view of a mine main ventilator structure arranged in an underground ventilation system proposed by the present invention;

[0027] Figure 2 A top view of a mine main ventilator structure arranged in an underground ventilation system proposed by the present invention;

[0028] Figure 3 This is a schematic diagram of the fan outer cylinder structure proposed by the present invention.

[0029] Among them, 1. Fan outer cylinder; 101, damper; 2. Fan room; 3. Cement air duct; 4. Slide rail; 5. Motor; 6. Drive shaft; 7. Impeller; 8. Fan inner cylinder. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] like Figure 1-3 As shown, an embodiment of the present invention provides a mine main ventilation fan structure arranged in an underground ventilation system, comprising a fan outer cylinder 1 and a fan room 2, an air inlet is arranged on the left wall of the fan room 2 and an air outlet is arranged on the right wall, a cement air duct 3 is fixedly connected to the outside of the fan room 2 and at a position corresponding to the air inlet and the air outlet, the air inlet and the air outlet of the fan outer cylinder 1 are sealed and connected to the air inlet and the air outlet of the fan room 2, a damper 101 is arranged at the air inlet end of the fan outer cylinder 1, an oil station, a brake and a grounding control box are fixedly installed inside the fan room 2, during use, a motor 5 fixedly installed inside a closed fan inner cylinder 8 is used to drive a transmission shaft 6 fixedly installed on the output end of the motor 5, thereby driving an impeller 7 fixedly installed at the end of the transmission shaft 6 to rotate to generate airflow, and the airflow direction is from left to right;

[0033] The airflow generated by the rotation of the impeller 7 directly enters the air duct between the fan outer cylinder 1 and the fan inner cylinder 8 from the cement air duct 3, and then directly enters the next section of the cement air duct 3 from the air duct to complete the airflow transportation. In this process, since the closed fan inner cylinder 8 is fixedly installed inside the fan outer cylinder 1 through a connecting piece, and the air inlet end and the air outlet end of the fan outer cylinder are extended to the outside of the fan room 2 and are directly sealed and connected to the cement air duct 3, the airflow will not enter the fan room 2, which can effectively improve the cleanliness of the fan room 2, and it is also convenient for the staff to enter the fan room at any time to inspect and maintain the fan and its auxiliary facilities;

[0034] Slide rails 4 are symmetrically installed on the floor of the fan room 2. The rollers fixedly installed at the bottom of the fan outer cylinder 1 cooperate with the slide rails 4, which can effectively improve the convenience of installation or maintenance operations on the fan outer cylinder 1, and is beneficial to improving the efficiency of maintenance operations on the fan outer cylinder 1 or the facilities inside the fan outer cylinder 1.

[0035] The motor 5 is located on the side close to the air outlet end of the fan outer cylinder 1, the impeller 7 is located on the side close to the air inlet end of the fan outer cylinder 1, the transmission shaft 6 and the fan outer cylinder 1 are coaxially arranged, and the fan outer cylinder 1 and the fan inner cylinder 8 are concentrically arranged.

[0036] The impeller 7 is composed of a hub and blades, and the blades are equidistantly fixed on the radial side surface of the hub. The blades are located in the air duct, and the fan inner cylinder 8 is in sealing contact with the axial side surface of the hub, which can ensure that the interior of the fan inner cylinder 8 is always in a closed state. A bearing box is arranged between the transmission shaft 6 and the impeller 7, and the bearing box can overcome the bidirectional axial force.

[0037] Embodiment 2:

[0038] This embodiment is an improvement based on the first embodiment: an inlet and outlet connected to the outside are arranged on the fan room 2, and an inspection passage connected to the inlet and outlet is laid on the floor of the fan room 2, and the inspection passage runs through the entire fan room 2.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mine main fan structure arranged in an underground ventilation system, comprising a fan outer cylinder (1) and a fan room (2), wherein the left wall of the fan room (2) is provided with an air inlet and the right wall is provided with an air outlet, a damper (101) is provided at the air inlet end of the fan outer cylinder (1), and a brake and grounding control box is fixedly installed inside the fan room (2), characterized in that: A fan inner cylinder (8) is fixedly mounted inside the fan outer cylinder (1) via a connecting component, a motor (5) is fixedly mounted inside the fan inner cylinder (8), an air duct is formed between the fan inner cylinder (8) and the fan outer cylinder (1), a transmission shaft (6) is fixedly connected to the output end of the motor (5), and an impeller (7) is fixedly connected to the output end of the transmission shaft (6) away from the motor (5); A cement air duct (3) is fixedly connected to the outside of the fan room (2) and at positions corresponding to the air inlet and the air outlet, and the air inlet and the air outlet of the fan outer cylinder (1) are sealedly connected to the air inlet and the air outlet of the fan room (2).

2. A mine main ventilator structure arranged in an underground ventilation system according to claim 1, characterized in that: Slide rails (4) are symmetrically fixedly installed on the floor of the fan room (2), and pulleys are installed at the bottom of the fan outer cylinder (1), and the pulleys cooperate with the slide rails (4).

3. A mine main ventilator structure arranged in an underground ventilation system according to claim 1, characterized in that: The transmission shaft (6) is located in a sealed fan inner cylinder (8).

4. A mine main ventilator structure arranged in an underground ventilation system according to claim 1, characterized in that: A bearing box is arranged between the transmission shaft (6) and the impeller (7), and the bearing box is capable of overcoming bidirectional axial forces.

5. A mine main ventilator structure arranged in an underground ventilation system according to claim 1, characterized in that: The transmission shaft (6) and the fan outer cylinder (1) are coaxially arranged, and the fan outer cylinder (1) and the fan inner cylinder (8) are concentrically arranged.

6. A mine main ventilator structure arranged in an underground ventilation system according to claim 1, characterized in that: The impeller (7) is composed of a hub and blades, wherein the blades are fixed on the radial side surface of the hub and are located in the air duct, and the fan inner cylinder (8) is in sealing contact with the axial side surface of the hub.

7. A mine main ventilator structure arranged in an underground ventilation system according to claim 1, characterized in that: An oil station is fixedly installed inside the fan room (2).

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