Unmanned automatic starting and stopping device for mining axial flow fan

Abstract

The unmanned automatic starting and stopping device comprises an air duct, a microswitch, a pressing plate, a wind shield, a contactor and a rotating shaft, the air duct is installed at the front end of an air inlet of the mining axial flow fan, the microswitch is fixedly installed on the outer wall of the air duct, the rotating shaft is installed in the air duct, the rotating shaft penetrates through the air duct, and the pressing plate is connected to the outer side of the air duct. The rotating shaft is further connected with a wind shield in the air duct, the pressing plate is arranged above the microswitch, the microswitch is connected with the contactor, and the contactor is further connected with a mining axial flow fan motor. According to the unmanned automatic starting and stopping device for the mining axial flow fans, all the mining axial flow fans of a lower air path are automatically turned on and turned off through the air flow generated by the switch end fans, and the technical problems that the time consumed for manually starting and stopping the fans to walk back and forth in a long-distance roadway is long, operation is tedious, and efficiency is low are solved; the device is simple in structure and easy to install and maintain, and the purposes of reliable fan starting and stopping, high efficiency, low cost and simple maintenance are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of mine fan control, and in particular to an unmanned automatic start and stop device for a mine axial flow fan. Background Art

[0002] With the increasing depletion of shallow resources in many metal and non-metal mines at home and abroad, many mines are gradually moving to deep mining. With the continuous increase in mining depth and the longer mining tunnels, more and more ventilation technical problems are faced, and safety risks are particularly prominent. Therefore, in long-distance tunnels with a distance of more than 1km, using wind belts and mining axial flow fans as dedicated air ducts is often the preferred measure for head-on exhaust.

[0003] Due to the restrictions of the underground mine terrain, the mining axial flow fans used in the tunnels have low power, resulting in a short exhaust distance. In order to ensure the ventilation effect, multiple mining axial flow fans need to be installed in long-distance tunnels to meet the ventilation quality. In the existing fan control technology, most of them still use manual start and stop of fans, requiring operators to walk from the head face to the fan control box to start the fan, and then walk to the fan control box to turn off the fan after the head face gas detection meets the standard. There are problems such as long walking back and forth, cumbersome operation, and low efficiency; or laying a special control cable to start and stop the fan. Since the length of the control cable is twice the length of the line from the head face control box to the fan control box at the end of the wind path, there are problems such as high cost, large line loss, and difficult maintenance. Utility Model Content

[0004] In order to solve or partially solve the problems existing in the related technology, the present application provides an unmanned automatic start and stop device for a mining axial flow fan, which automatically turns on and off the mining axial flow fan according to the wind flow, thereby solving technical problems such as time-consuming and inefficient manual start and stop in long-distance tunnels, or high cable laying costs and difficult maintenance.

[0005] The first aspect of the present application provides an unmanned automatic start and stop device for an axial flow fan for mining, comprising: a wind tube, a micro switch, a pressure plate, a wind shield, a contactor and a rotating shaft. The wind tube is installed at the front end of the air inlet of the axial flow fan for mining, the micro switch is fixedly installed on the outer wall of the wind tube, the rotating shaft is installed inside the wind tube, the rotating shaft passes through the wind tube and is connected to the pressure plate on the outside of the wind tube, the rotating shaft is also connected to the wind shield inside the wind tube, the pressure plate is arranged above the micro switch, the micro switch is connected to the contactor, and the contactor is also connected to the motor of the axial flow fan for mining.

[0006] Furthermore, the micro switch contact is normally open, and the micro switch button is arranged upwardly opposite to the pressure plate.

[0007] Furthermore, the wind tube and the mining axial flow fan are installed at the same horizontal position, and the diameter of the wind tube is smaller than the diameter of the mining axial flow fan.

[0008] Furthermore, the rotating shaft is installed at the upper 1 / 3 of the wind tube, the rotating shaft is horizontally arranged, and is vertically connected to the side wall of the wind tube.

[0009] The technical solution provided by this application may have the following beneficial effects:

[0010] The present application provides an unmanned automatic start and stop device for mining axial flow fans, which automatically switches on and off all mining axial flow fans in the downwind path by switching on and off the end fans to generate airflow, thereby solving the technical problem of manually starting and stopping fans in long-distance tunnels, which is time-consuming, cumbersome to operate, and inefficient. The device has a simple structure, is easy to install and maintain, and achieves the goals of reliable fan start and stop, high efficiency, low cost, and simple maintenance.

[0011] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0013] Figure 1 is a still schematic diagram of a device shown in an embodiment of the present application;

[0014] Figure 2 is a schematic diagram of starting the device shown in the embodiment of the present application;

[0015] Figure 3 This is a view of the inside of the wind tube when the fan is stopped, as shown in the embodiment of the present application;

[0016] Figure 4 This is a view of the inside of the wind tube when the fan is started, as shown in the embodiment of the present application;

[0017] Reference numerals:

[0018] In the figure, 1-air cylinder, 2-micro switch, 3-pressure plate, 4-wind shield, 5-motor, 6-fan blades, 7-contactor, 8-rotating shaft. DETAILED DESCRIPTION

[0019] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0020] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0021] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present application.

[0022] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0024] An unmanned automatic start and stop device for an axial flow fan for mining includes: a wind tube 1, a micro switch 2, a pressure plate 3, a wind shield 4, a contactor 7 and a rotating shaft 8. The axial flow fan for mining includes a motor 5 and a fan blade 6 fixed to the end of the output shaft of the motor 5. The wind tube 1 is installed at the front end of the air inlet of the axial flow fan for mining. The wind tube 1 and the axial flow fan for mining are installed at the same horizontal position, and the diameter of the wind tube 1 is smaller than the diameter of the axial flow fan for mining. A micro switch 2 is fixedly installed on the outer wall of the wind tube 1, and the contact of the micro switch 2 is normally open and the switch button is upward. A rotating shaft 8 is installed horizontally inside the wind tube 1. The rotating shaft 8 is installed at the upper 1 / 3 of the wind tube 1, located above the micro switch 2 and vertically connected to the side wall of the wind tube 1. The rotating shaft 8 passes through the wind tube 1 horizontally and is connected to a pressure plate 3 on the outside of the wind tube 1. The rotating shaft 8 is also connected to a wind shield 4 inside the wind tube 1. The pressure plate 3 is arranged above the micro switch 2. When the pressure plate 3 rotates downward, it can press the micro switch 2. The micro switch 2 is connected to the contactor 7, and the contactor 7 is also connected to the mining axial flow fan motor 5.

[0025] like Figure 1 , Figure 3 As shown, when there is no wind flow in the wind tube 1, the wind shield 4 relies on its own weight to maintain a vertical state in the wind tube 1, the pressure plate 3 maintains an oblique upward state, the micro switch 2 is normally open, the contactor 7 is disconnected, and the mining axial flow fan stops.

[0026] like Figure 2 , Figure 4 As shown, when there is airflow in the wind tube 1, the wind shield 4 rotates to the right. Since the pressure plate 3 and the wind shield 4 are hard-connected through the rotating shaft 8, when the wind shield 4 rotates, the pressure plate 3 rotates accordingly, and the rotation amount is equal. The pressure plate 3 rotates downward to press the button of the micro switch 2, the micro switch 2 is actuated, the contacts are closed, the control contactor 7 coil is closed, and the mining axial flow fan is started.

[0027] After the personnel starts the mining axial flow fan on the front side of the operation, the wind flow generated by the mining axial flow fan on the front side enters the wind tube 1 of the mining axial flow fan in the downwind path, and the wind flow drives the wind shield plate 4 to rotate right, thereby making all the mining axial flow fans in the downwind path start automatically. When the personnel stops the mining axial flow fan on the front side of the operation, all the mining axial flow fans in the downwind path can stop automatically.

[0028] Finally, it should be noted that, in this article, relationships such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms include, include or any other variations are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0030] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An unmanned automatic start and stop device for an axial flow fan for mining, characterized in that: include: The invention relates to a wind tube (1), a micro switch (2), a pressure plate (3), a wind shield (4), a contactor (7) and a rotating shaft (8). The wind tube (1) is installed at the front end of the air inlet of the mining axial flow fan, the micro switch (2) is fixedly installed on the outer wall of the wind tube (1), the rotating shaft (8) is installed inside the wind tube (1), the rotating shaft (8) passes through the wind tube (1) and is connected to the pressure plate (3) outside the wind tube (1), the rotating shaft (8) is also connected to the wind shield (4) inside the wind tube (1), the pressure plate (3) is arranged above the micro switch (2), the micro switch (2) is connected to the contactor (7), and the contactor (7) is also connected to the motor of the mining axial flow fan.

2. The unmanned automatic start and stop device for a mining axial flow fan according to claim 1 is characterized in that: The contact of the micro switch (2) is normally open, and the button of the micro switch (2) is arranged upward and opposite to the pressure plate (3).

3. The unmanned automatic start and stop device for a mining axial flow fan according to claim 1 is characterized in that: The wind tube (1) and the mining axial flow fan are installed at the same horizontal position, and the diameter of the wind tube (1) is smaller than the diameter of the mining axial flow fan.

4. The unmanned automatic start and stop device for a mining axial flow fan according to claim 1 is characterized in that: The rotating shaft (8) is installed at the upper 1 / 3 of the wind tube (1). The rotating shaft (8) is arranged horizontally and vertically connected to the side wall of the wind tube (1).

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