Series fan semi-closed exhaust system

Abstract

The utility model relates to a series fan semi-closed exhaust system which comprises a front draw-out type fan, a rear draw-out type fan, a rear air bag and a front air bag, the rear end of the front draw-out type fan is connected with the front air bag, the rear draw-out type fan is arranged at intervals with the front air bag, and the rear air bag is connected with the rear end of the rear draw-out type fan; the device further comprises a non-return rubber net, a hollow iron sheet and a front hard air duct. The front hard air duct is fixedly arranged at the rear end of the front air bag, the hollow iron sheet is arranged as a cavity cover, covers the front end of the rear draw-out type fan and accommodates the rear end part of the front hard air duct, and a non-return rubber net is arranged on the hollow iron sheet and is connected with an outer duct arm of the front hard air duct; by means of the device, it is guaranteed that dirty air does not flow outwards in the long-distance air return process, meanwhile, the service life of the draught fan is prolonged, and the problems that dirty air flows outwards in the long-distance air return process and the service life of the draught fan is short are effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of mining equipment, and in particular to a semi-enclosed exhaust system with series fans. Background Art

[0002] As underground mineral resources are gradually mined deeper and the mining depth continues to increase, the deep mining site is faced with problems such as long polluted air return lines, slow return air speed, and insufficient power of fans and other equipment and facilities. This causes polluted air to continuously flow out at the connection between the front and rear fans, increasing on-site environmental pollution and causing gas over-limit in the tunnels, which in turn increases the safety risk of underground operations. At the same time, increasing attention is being paid to green, safe and environmentally friendly production and comprehensive utilization of solid waste. How to achieve green, safe and environmentally friendly production is also the main direction of future development. Therefore, how to ensure that polluted air does not flow out during long-distance ventilation underground and ensure safe and environmentally friendly production in underground tunnels is a key problem that needs to be solved in current deep mining. Utility Model Content

[0003] In order to solve or partially solve the problems existing in the related technology, the present application provides a semi-closed exhaust system of series fans, including a front exhaust fan, a rear exhaust fan, a rear air bag, and a front air bag. The rear end of the front exhaust fan is connected to the front air bag, the rear exhaust fan is arranged at an interval of the front air bag, and the rear air bag is connected and arranged at the rear end of the rear exhaust fan; it also includes a non-return rubber net, a hollow iron sheet, and a front hard air duct; the front hard air duct is fixedly arranged at the rear end of the front air bag, the hollow iron sheet is arranged as a cavity cover and covers the front end of the rear exhaust fan and accommodates the rear end part of the front hard air duct, and a non-return rubber net is arranged on the hollow iron sheet to connect the outer cylinder arm of the front hard air duct.

[0004] Optionally, in some embodiments of the first aspect, the hollow iron sheet is configured to be cylindrical, and the hollow iron sheet is welded to the rear exhaust fan.

[0005] Optionally, in some embodiments of the first aspect, the hard air duct is arranged directly opposite to the air outlet of the rear exhaust fan.

[0006] Optionally, in some embodiments of the first aspect, the non-return rubber net is an elastic rubber net, a through hole is constructed on the non-return rubber net, a rubber elastic cover plate is provided on the through hole, and two ends of the elastic cover plate are fixedly connected to the non-return rubber net.

[0007] Optionally, in some embodiments of the first aspect, the through hole is configured as a square hole, and the elastic cover plate is configured as a square that matches the through hole, wherein two opposite ends of the elastic cover plate are fixedly connected to the non-return rubber net, and the other two ends are contact-connected to the surface of the non-return rubber net. The elastic cover plate is disposed on a side close to the rear exhaust fan.

[0008] The technical solution provided by this application may have the following beneficial effects:

[0009] This device prevents the leakage of dirty air and damage to the equipment by setting a non-return rubber net at the connection between the front and rear ends and constructing a relatively one-sided non-return dirty air non-return device through hollow iron sheets. It not only prevents the dirty air from flowing out, but also ensures that the dirty air extracted from the front exhaust fan cannot flow out from between the rear exhaust fan and the front hard air duct; at the same time, the dirty air in the lane will also be extracted by the rear exhaust fan through this device. This device not only ensures that the dirty air does not flow out during the long-distance return process, but also increases the service life of the fan, effectively solving the problems of dirty air outflow and short service life of the fan during the long-distance return process.

[0010] 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

[0011] 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.

[0012] Figure 1 It is a structural schematic diagram shown in an embodiment of the present application;

[0013] Figure 2 It is a partial enlarged view shown in the embodiment of the present application;

[0014] Figure 3 It is a schematic structural diagram of the non-return rubber net shown in the embodiment of the present application.

[0015] Reference numerals:

[0016] A tunnel face (1), a front exhaust fan (2), a non-return rubber net (3), a hollow iron sheet (4), a rear exhaust fan (5), a rear air bag (6), a tunnel (7), a front air bag (8), a front hard air duct (9), surrounding rock of the underground tunnel (10), a through hole (31), and an elastic cover plate (32). DETAILED DESCRIPTION

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] In view of the problems in the above background technology, the embodiment of the present application provides a semi-enclosed exhaust system with series fans. The technical solution of the embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0022] Figure 1 is a schematic diagram of the structure of the device shown in the embodiment of the present application, see Figure 1A semi-closed exhaust system of series fans includes a front exhaust fan 2, a rear exhaust fan 5, a rear air bag 6, and a front air bag 8. The rear end of the front exhaust fan 2 is connected to the front air bag 8, the rear exhaust fan 5 is arranged at an interval from the front air bag 8, and the rear air bag 6 is connected to the rear end of the rear exhaust fan 5. The device also includes a non-return rubber net 3, a hollow iron sheet 4, and a front hard air duct 9. In the device, the front hard air duct 9 is fixedly arranged at the rear end of the front air bag 8 to form a wind channel with the front air bag 8, and the wind extracted by the front exhaust fan 2 is transmitted backward from the wind channel. The hollow iron sheet 4 is set as a cavity cover and covers the front end of the rear exhaust fan 5 and accommodates the rear end part of the front hard air duct 9. The hollow iron sheet 4 is actually arranged at the connection between the front and rear air ducts. Due to the increase in depth, it is necessary to add multi-stage fans for segmented exhaust. However, because the connection cannot be absolutely sealed, the dirty air described in the background technology will continue to flow out at the connection between the front and rear fans, increasing on-site environmental pollution, causing gas over-limit in the tunnel, and further increasing the safety risk of underground operations. The present application forms a transition channel by covering the connection with a hollow iron sheet 4, and a check rubber net 3 is arranged on the hollow iron sheet 4 to connect the outer cylinder arm of the front hard wind tube 9 to form a relatively sealed dirty air check device to prevent the dirty air from leaking out. When the front exhaust volume of the connection is greater than the rear air supply volume, the wind stop is restricted in the hollow iron sheet 4 and presses the dirty air to the rear end, which prevents the dirty air from leaking out on the one hand and assists the rear end exhaust on the other hand; when the front exhaust volume is less than the rear air supply volume, the wind outside the hollow iron sheet 4 is sucked through the check rubber net 3. If there is still a small amount of dirty air outside at this time, it will be sucked out and increase the exhaust efficiency of the dirty air in the lane. If an open type is used here, when the front exhaust volume is greater than the rear air supply volume, the dirty air will inevitably leak out, and due to the continuous exhaust of the front end, the dirty air may move to the front end again and cause pollution to the entire lane; and if a completely sealed type is used here, when the front exhaust volume is less than the rear air supply volume, the rear exhaust fan 5 at the rear end will suck the front air bag 8 at the front end. If the duration is too long, after the wind in the front air bag 8 is completely sucked away, the front and rear pressure difference of the rear exhaust fan 5 will increase with the increase of time, damaging the rear exhaust fan 5 and the front air bag 8 at the front end. Therefore, through this device, a non-return rubber net 3 is set at the connection between the front and rear ends, and a relatively one-sided non-return dirty air non-return device is constructed through the hollow iron sheet 4 to prevent the leakage of dirty air and damage to the equipment. It not only prevents the dirty air from flowing out, but also ensures that the dirty air extracted from the front exhaust fan cannot flow out from between the rear exhaust fan and the front hard air duct; at the same time, the dirty air in the lane will also be extracted by the rear exhaust fan through the device. This device not only ensures that the dirty air does not flow out during the long-distance return process, but also increases the service life of the fan, effectively solving the problem of dirty air outflow and short service life of the fan during the long-distance return process.

[0023] In one embodiment, the hollow iron sheet 4 is configured to be cylindrical, and the hollow iron sheet 4 and the rear exhaust fan 5 are welded and sealed.

[0024] In one embodiment, Figure 2 As shown, the front hard air duct 9 is arranged directly opposite to the air outlet of the rear exhaust fan 5, so that the polluted air can be accurately sucked away after being discharged, and it is also convenient for the fastening connection between the non-return rubber net and the hard air duct, for example, the non-return rubber net 3 is fastened to the front hard air duct 9 and the rear exhaust fan 5 by using a clamp.

[0025] In one embodiment, Figure 3 As shown, a specific non-return rubber net 3 is an elastic rubber net, a through hole 31 is constructed on the non-return rubber net 3, and a rubber elastic cover plate 32 is provided on the through hole 31, and two ends of the elastic cover plate 32 are fixedly connected to the non-return rubber net 3.

[0026] In one embodiment, the through hole 31 is set as a square hole, and the elastic cover plate 32 is set to be a square that matches the through hole 31, wherein the two opposite ends of the elastic cover plate 32 are fixedly connected to the non-return rubber net 3, and the other two ends are in contact with the surface of the non-return rubber net 3. In this way, the pressure difference at the two ends of the non-return rubber net 3 is convenient to open, recycle and close the through hole 31.

[0027] In one embodiment, the elastic cover plate 32 is arranged on a side close to the rear exhaust fan 5 .

[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 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. A semi-closed exhaust system of series fans, comprising a front exhaust fan (2), a rear exhaust fan (5), a rear air bag (6), and a front air bag (8), wherein the rear end of the front exhaust fan (2) is connected to the front air bag (8), the rear exhaust fan (5) is arranged at intervals from the front air bag (8), and the rear air bag (6) is connected to the rear end of the rear exhaust fan (5); characterized in that: It also comprises a non-return rubber net (3), a hollow iron sheet (4), and a front hard air duct (9); the front hard air duct (9) is fixedly arranged at the rear end of the front air bag (8); the hollow iron sheet (4) is arranged as a cavity cover and covers the front end of the rear exhaust fan (5) and accommodates the rear end part of the front hard air duct (9); and the non-return rubber net (3) is arranged on the hollow iron sheet (4) to connect the outer cylinder arm of the front hard air duct (9).

2. A semi-closed exhaust system of series fans according to claim 1, characterized in that: The hollow iron sheet (4) is configured in a cylindrical shape, and the hollow iron sheet (4) is welded to the rear exhaust fan (5).

3. A semi-closed exhaust system of series fans according to claim 1, characterized in that: The front hard air duct (9) is arranged directly opposite to the air outlet of the rear exhaust-type fan (5).

4. A semi-closed exhaust system of series fans according to claim 1, characterized in that: The non-return rubber net (3) is an elastic rubber net, a through hole (31) is formed on the non-return rubber net (3), a rubber elastic cover plate (32) is provided on the through hole (31), and two ends of the elastic cover plate (32) are fixedly connected to the non-return rubber net (3).

5. A semi-closed exhaust system of series fans according to claim 4, characterized in that: The through hole (31) is configured as a square hole, and the elastic cover plate (32) is configured as a square that matches the through hole (31), wherein the two opposite ends of the elastic cover plate (32) are fixedly connected to the non-return rubber net (3), and the other two ends are in contact with the surface of the non-return rubber net (3).

6. A semi-closed exhaust system of series fans according to claim 4 or 5, characterized in that: The elastic cover plate (32) is arranged on a side close to the rear exhaust fan (5).

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