Reducing device of underground fan

Abstract

The utility model provides an underground fan reducing device which comprises a reducing pipe and a straight pipe which are connected in series, the reducing pipe is horizontally arranged, the other end of the reducing pipe is provided with a butt flange, the straight pipe is obliquely arranged, and the other end of the straight pipe is provided with a fixed limiting ring. The fixing device is used for fixing the fan and the air duct cloth, the adaptability of the air duct cloth and ventilation equipment can be improved, the service life of the air duct cloth and the ventilation equipment can be prolonged, the safety risk in the installation and operation of the ventilation equipment can be avoided, the structure is simple, installation is convenient, the construction efficiency of mine underground fan installation can be improved, and the operation environment of underground ventilation equipment can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mine underground ventilation equipment installation and relates to an underground fan diameter-changing device. Background Art

[0002] In underground mines, the slopes are long and the excavation sections are widely distributed. The ventilation system needs to use fans to deliver fresh air to the working surface. However, due to factors such as limited underground space, heavy ventilation equipment, and mismatched sizes of fans and air ducts, underground fan installation and ventilation operation are inconvenient. Therefore, how to improve the installation efficiency of underground ventilation equipment and the service life of ventilation materials, reduce labor intensity, and ensure the safety and reliability of ventilation equipment is a difficult problem in the construction of mine ventilation systems. Utility Model Content

[0003] The purpose of this utility model is to provide an underground fan diameter reducing device to solve the problems existing in the prior art, such as the mismatch between the size of the fan and the air duct cloth of the current underground ventilation equipment, which leads to high ventilation installation risk factor, low installation efficiency and short service life of ventilation equipment materials.

[0004] To this end, the present invention adopts the following technical solutions:

[0005] A downhole fan reducing device includes a reducing pipe and a straight pipe connected in series, with an angle of 30° between the two. The reducing pipe is horizontally arranged, and a docking flange is provided at the other end. 16 to 20 openings are evenly arranged on the edge, and the aperture of the openings is 20 mm. The straight pipe is inclined, and a fixed limiting ring is provided at the other end. The fixed limiting ring is in the shape of a circular ring.

[0006] Furthermore, the wall thickness of the reducer and the straight tube is 2-5 mm.

[0007] The beneficial effects of the present invention are:

[0008] The utility model is used to fix the fan and the air duct cloth, which can not only increase the adaptability of the air duct cloth to the ventilation equipment and its service life, but also avoid safety risks in the installation and operation of the ventilation equipment. It has a simple structure and is easy to install. It can improve the construction efficiency of the installation of fans in underground mines and improve the operating environment of underground ventilation equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of the present utility model.

[0010] In the figure, 1- docking flange, 2- reducer, 3- straight pipe, 4- fixed limit ring. DETAILED DESCRIPTION

[0011] The technical solution of the present invention is described below in conjunction with the accompanying drawings and implementation methods.

[0012] like Figure 1 As shown, a downhole fan reducing device includes a reducing pipe 2 and a straight pipe 3 connected in series. The wall thickness of the reducing pipe 2 and the straight pipe 3 is 2~5mm, and the angle between the two is 30°. The reducing pipe 2 is horizontally arranged, and a docking flange 1 is provided at the other end. 16~20 openings are evenly arranged on the edge of the straight pipe 3, and the hole diameter is 20mm. The straight pipe 3 is inclined, and a fixed limiting ring 4 is provided at the other end. The fixed limiting ring 4 is annular.

[0013] The utility model is used in the following process:

[0014] When ventilation equipment needs to be installed underground, the fan is lowered to the ground for installation using a lifting pulley set. Then, the reducer 2 is fixedly connected to the fan using the docking flange 1 and the fixed limiting ring 4 respectively. The straight pipe 3 and the air duct cloth are fixed firmly and reliably using the fixed limiting ring 4. The side of the air duct cloth is fixed to the well wall as required to complete the installation of the ventilation system.

Claims

1. A downhole fan diameter reducing device, characterized in that: The invention comprises a reducing pipe (2) and a straight pipe (3) connected in series, and the angle between the two is 30° to 60°. The reducing pipe (2) is arranged horizontally, and a docking flange (1) is provided at the other end thereof. 16 to 20 openings are evenly provided at the edge of the docking flange (1), and the openings have a diameter of 20 to 25 mm. The straight pipe (3) is arranged obliquely, and a fixed limiting ring (4) is provided at the other end thereof. The fixed limiting ring (4) is in the shape of a circular ring.

2. The downhole fan diameter reducing device according to claim 1, characterized in that: The wall thickness of the reducer (2) and the straight tube (3) are both 2-5 mm.

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