Enclosed space exhaust device

Abstract

The utility model discloses airtight space exhaust device, include: exhaust box, its inside has the exhaust passage, fan assembly, it includes rotation setting in the exhaust passage and interval setting's first fan and second fan, and the opposite side of first fan and second fan is equipped with the transmission gear ring of circumference, drive arrangement, it includes setting in the drive motor of exhaust box, setting in the bevel gear and transmission gear of drive motor output, transmission gear includes transmission shaft and sets up on transmission gear's bevel gear and driven gear, and bevel gear and bevel gear engage, and driven gear and two transmission gear rings engage simultaneously to drive two fans reverse rotation. The scheme drives two groups of fans reverse direction rotation through a group of drive mechanism, and it offsets the rotational vortex that first fan generates through second fan and does "negative work" to the airflow of rotation, will its rotational kinetic energy "break straight", converts into the axial kinetic energy of backward, has reached the effect of rectification vortex, improves the wind power under the condition of the invariable volume and the invariable rotating speed, to improve the efficiency of downhole exhaust.

Description

Technical Field

[0001] This utility model relates to ventilation devices, and more particularly to ventilation devices for enclosed spaces. Background Technology

[0002] When working underground, there are often many harmful gases in the well. If workers go down into the well directly, they may be poisoned. Therefore, before entering the well, it is necessary to extract the air from the well or blow fresh air into the well to remove the toxic gases.

[0003] Currently, ordinary exhaust fans or blowers are generally used to draw air from or blow air into enclosed spaces after connecting to ducts. For example, patent application number US20080336979A discloses a conductive enclosed space ventilation duct formed of a conductive polymer, and describes the electrical grounding circuit of the ventilation system using it, as well as its use and formation method. In addition, the ventilation device installation structure of our company's earlier patent application, application number CN202421533738.X, also uses an ordinary ventilation device.

[0004] However, in actual use, we found that as the depth of the shaft increases, the energy loss at the duct is significant, especially when using flexible ducts. The airflow generated by ordinary air-forming structures cannot achieve the expected ventilation efficiency after various influences, resulting in a significant increase in ventilation time. Utility Model Content

[0005] This invention addresses the problem that the airflow intensity generated by ordinary ventilation structures in the prior art is weak, and the intensity further weakens after energy loss during operation, ultimately leading to low efficiency. The technical problem to be solved by this invention is to provide an exhaust device for enclosed spaces.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] A confined space exhaust system includes:

[0008] The exhaust box has an internal exhaust duct.

[0009] A fan assembly includes a first fan and a second fan that are rotatably disposed in an exhaust duct and spaced apart from each other, with a circumferential transmission gear ring provided on the opposite side of the first fan and the second fan;

[0010] The drive unit includes a drive motor disposed outside the exhaust box body, a bevel gear and a transmission gear disposed at the output end of the drive motor. The transmission gear includes a transmission shaft and a bevel gear and a driven gear disposed on the transmission gear. The bevel gear and the bevel gear mesh, and the driven gear meshes with two transmission gear rings simultaneously.

[0011] Preferably, the first fan and the second fan are rotatably engaged with the inner wall of the exhaust duct via bearings.

[0012] Preferably, the first fan and the second fan are symmetrically arranged on the left and right, each including a circular outer ring, several fan blades arranged on the outer ring, and a fixing post for fixing the inner end of the fan blades. The outer ring has a stepped structure on one side of the outer wall, the bearing is sleeved and fixed at the stepped structure, and the transmission gear ring is arranged on the other side wall of the outer ring.

[0013] Preferably, the first fan and the second fan have the same number of fan blades and are evenly distributed in a circular array. At the same time, the fan blades of the two fans are staggered in the circumferential direction.

[0014] Preferably, the exhaust box is provided with flow guide joints on both sides. The diameter of the flow guide joint gradually decreases from the inside to the outside and then remains stable. The outer end of the flow guide joint is used to fit the connecting air duct.

[0015] Compared with the prior art, the present invention has the following advantages: The present application drives two sets of fans to rotate in opposite directions through a set of drive mechanisms. The second fan cancels the rotating vortex generated by the first fan and does "negative work" on the rotating airflow, "straightening" its rotational kinetic energy and converting it into backward axial kinetic energy, thereby achieving the effect of correcting the vortex and increasing the wind power without changing the volume and speed, thereby improving the efficiency of underground ventilation. Attached Figure Description

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0017] Figure 1 This is a perspective view of the present application;

[0018] Figure 2 This is a cross-sectional view of this application;

[0019] Figure 3 This is a three-dimensional view of the transmission and fan components;

[0020] In the diagram: 10, exhaust box; 101, exhaust duct; 20, drive unit; 201, drive motor; 202, bevel gear; 203, bevel gear; 204, driven gear; 30, air guide connector; 40, first fan; 401, outer ring; 4011, transmission gear ring; 402, fan blade; 403, fixed column; 50, second fan; 60, bearing. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0022] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures. Example

[0023] This embodiment mainly describes the title of the enclosed space exhaust device, as follows:

[0024] like Figure 1-3 As shown, the enclosed space exhaust system includes:

[0025] The exhaust box 10 has an exhaust duct 101 inside;

[0026] The fan assembly includes a first fan 40 and a second fan 50 that are rotatably disposed in the exhaust duct 101 and spaced apart from each other. The first fan 40 and the second fan 50 are provided with a circumferential transmission gear ring 4011 on opposite sides.

[0027] The drive unit 20 includes a drive motor 201 mounted outside the exhaust box 10, a bevel gear 202 mounted at the output end of the drive motor 201, and a transmission gear. The transmission gear includes a drive shaft and a bevel gear 203 and a driven gear 204 mounted on the transmission gear. The bevel gear 202 and the bevel gear 203 mesh, and the driven gear 204 meshes with two transmission gear rings 4011 simultaneously. This solution drives two sets of fans to rotate in opposite directions through a drive mechanism. The second fan 50 counteracts the rotating vortex generated by the first fan 40 and performs "negative work" on the rotating airflow, "straightening" its rotational kinetic energy and converting it into rearward axial kinetic energy, thus achieving the effect of correcting the vortex. This increases the airflow without changing the volume or rotational speed, thereby improving the efficiency of underground ventilation.

[0028] Preferably, the first fan 40 and the second fan 50 are rotatably engaged with the inner wall of the exhaust duct 101 via the bearing 60.

[0029] Preferably, the first fan 40 and the second fan 50 are symmetrically arranged, each including a circular outer ring 401, several fan blades 402 disposed on the outer ring 401, and fixing posts 403 for fixing the inner ends of the fan blades 402. The outer ring 401 has a stepped structure on one side of its outer wall, where the bearing 60 is fitted and fixed. The transmission gear ring 4011 is disposed on the other side wall of the outer ring 401. The stepped structure not only provides installation space for the bearing 60 but also facilitates the placement of the transmission gear ring 4011.

[0030] Preferably, the first fan 40 and the second fan 50 have the same number of fan blades 402 and are evenly distributed in a circular array. At the same time, the fan blades 402 of the two are staggered in the circumferential direction.

[0031] Preferably, the exhaust box 10 is provided with flow guide joints 30 on both sides. The diameter of the flow guide joint 30 gradually decreases from the inside to the outside and then remains stable. The outer end of the flow guide joint 30 is used to fit the connecting air duct.

[0032] It should be noted that, for ease of installation, the exhaust box 10 is configured as a combination of a square outer shell and an inner shell. The inner shell is divided into left and right parts and is welded to the two ends of the outer shell respectively. In addition, the driven gear 204 and the transmission gear ring 4011 can also be configured as a meshing helical gear set.

[0033] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A ventilation device for a confined space, characterized in that, include: The exhaust box has an internal exhaust duct. A fan assembly includes a first fan and a second fan that are rotatably disposed in an exhaust duct and spaced apart from each other, with a circumferential transmission gear ring provided on the opposite side of the first fan and the second fan; The drive unit includes a drive motor disposed outside the exhaust box body, a bevel gear and a transmission gear disposed at the output end of the drive motor. The transmission gear includes a transmission shaft and a bevel gear and a driven gear disposed on the transmission gear. The bevel gear and the bevel gear mesh, and the driven gear meshes with two transmission gear rings simultaneously.

2. The enclosed space exhaust device according to claim 1, characterized in that, The first and second fans rotate with the inner wall of the exhaust duct via bearings.

3. The enclosed space exhaust device according to claim 2, characterized in that, The first and second fans are symmetrically arranged on the left and right, each including a circular outer ring, several fan blades set on the outer ring, and a fixing post for fixing the inner end of the fan blades. The outer wall of the outer ring has a stepped structure on one side, the bearing is sleeved and fixed at the stepped structure, and the transmission gear ring is set on the other side wall of the outer ring.

4. The enclosed space exhaust device according to claim 3, characterized in that, The first and second fans have the same number of blades, which are evenly distributed in a circular array. At the same time, the blades of the two fans are staggered in the circumferential direction.

5. The enclosed space exhaust device according to claim 1, characterized in that, The exhaust box is equipped with flow guide joints on both sides. The diameter of the flow guide joint gradually decreases from the inside to the outside and then remains stable. The outer end of the flow guide joint is used to fit the connecting air duct.

Images