Bendable rigid dust extraction air duct

Abstract

The utility model relates to the technical field of dust extraction air ducts, in particular to a bendable rigid dust extraction air duct which comprises a rigid air duct body, the rigid air duct body comprises a bevel air duct body and a flange, the flange is fixedly installed on the side wall of one end of the bevel air duct body, and when a fully-mechanized coal winning machine is inverted to drive a bridge frame to form an arch shape, the bevel air duct body is bent. The bendable rigid air duct rotates and bends along the shaft to counteract the acting force acting on the air duct flange, at the moment, the sealing rubber sleeve bends upwards to form an arch shape, the sealing rubber sleeve is tightly attached to the beveled opening reinforcing frame to guarantee the sealing performance of the air duct, and the hinge of the bendable rigid air duct achieves natural bending and force unloading after the rigid air duct is stressed. The condition of air leakage caused by connector deformation after the rigid air duct is used for a long time is avoided, meanwhile, the sealing rubber sleeve and the connecting plate are adopted, sealing is achieved when the rigid air duct is bent, and compared with the condition of air leakage of the rigid air duct, the air volume of the air inlet of the dust suction air duct can be increased by more than 5% after the bendable rigid air duct is used.

Description

TECHNICAL FIELD

[0001] The utility model relates to dust extraction wind tube technical field, concretely is a kind of bendable rigid dust extraction wind tube. BACKGROUND

[0002] The dust control of coal mine fully mechanized excavation face currently commonly uses long pressure short extraction ventilation dust removal technology, its core is that dust control in the head area is controlled by wall-attached air duct and other dust control devices, high-concentration dust in the head area is sucked into dust collector for purification and then discharged to the rear of the roadway by the dust extraction device such as skeleton air duct or rigid air duct arranged on the fully mechanized excavation machine and bridge. The skeleton air duct is made of flexible antistatic flame-retardant air duct cloth, and will leave holes of different sizes on the air duct cloth when scraped by anchor rod, anchor cable or accidentally damaged, resulting in air leakage and affecting the dust removal effect of the working face.

[0003] At present, rigid air duct is used more and more due to its long service life, but the air duct joint will be deformed due to external force for a long time, resulting in air leakage and affecting the dust removal effect of the working face because the air duct is made of rigid material and the bridge will bend to be arched when the heading machine is reversed. SUMMARY

[0004] The utility model aims at providing a bendable rigid dust extraction wind tube to solve the problems in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a bendable rigid dust extraction wind tube, comprising: a rigid air duct, the rigid air duct comprises a beveled air duct and a flange, the flange is fixedly installed on one end of the side wall of the beveled air duct, and a beveled reinforcing frame is fixedly installed at the other end of the beveled air duct; the beveled reinforcing frames on adjacent two rigid air ducts are rotationally connected through a rotating part;

[0006] The outer ends of the adjacent two beveled reinforcing frames are sleeved with a sealing rubber sleeve, the sealing rubber sleeve is in the shape of a mouth, the upper and lower ends and the left and right ends of the sealing rubber sleeve are both provided with front and back sides through a fixing bolt one, the inner end of the pressing strip is in close contact with the outer end of the sealing rubber sleeve, the left and right ends of the sealing rubber sleeve are both provided with a connecting plate, one end of the connecting plate is fixedly connected with the outer wall of one of the pressing strips through a fixing bolt one, and the other end of the connecting plate is slidably connected with the side wall of the other beveled air duct.

[0007] Preferably, a plurality of circular holes are formed in the four end side walls of the beveled reinforcing frame, and a plurality of nuts are welded to the inner end side wall of each circular hole.

[0008] Preferably, the rotating part comprises a hinge, a connecting cylinder and a rotating plate, the two end connecting arms of the hinge are welded to the upper end side walls of the adjacent two beveled reinforcing frames, and the connecting cylinder is provided with a plurality of connecting cylinders and is fixedly welded to the lower end side wall of the beveled reinforcing frame.

[0009] Preferably, the rotating plates are provided in several groups, with two plates in each group. The two rotating plates are rotatably connected by a shaft, and a round rod is welded to the end of each rotating plate away from the shaft.

[0010] Preferably, the two round rods on each set of rotating plates are respectively inserted into the connecting cylinders on the two inclined reinforcing frames. Each rotating plate has a fixing hole at its upper end, and a fixing bolt is inserted into the fixing hole and fixed to the sealing sleeve by the fixing bolt.

[0011] Preferably, one end of the connecting plate has an arc-shaped hole, and one end of the fixing bolt slides through the arc-shaped hole and is threadedly connected to the inner wall of the nut.

[0012] Preferably, one end of the connecting plate is fixedly connected to the pressure strip at the front end of one side of the sealing sleeve, and the other end of the connecting plate is slidably connected to the pressure strip at the rear end of one side of the sealing sleeve.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] When the roadheader reverses and the bridge frame forms an arch, the flexible rigid ventilation duct will rotate and bend along the axis to counteract the force acting on the ventilation duct flange. At this time, the sealing sleeve will bend upward to form an arch. The sealing sleeve fits tightly with the inclined reinforcing frame to ensure the airtightness of the ventilation duct. The hinge of the flexible rigid ventilation duct enables the rigid ventilation duct to bend and unload force naturally after being subjected to force, avoiding the situation of air leakage caused by interface deformation after long-term use of the rigid ventilation duct. At the same time, the use of sealing sleeve and connecting plate achieves sealing when the rigid ventilation duct is bent. Compared with the air leakage of the rigid ventilation duct, the air volume of the dust extraction ventilation duct inlet can be increased by more than 5% after using the flexible rigid ventilation duct. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the connection between two rigid air ducts of this utility model;

[0016] Figure 2 This is a schematic diagram of the rigid ventilation duct structure of this utility model;

[0017] Figure 3 This utility model Figure 1 Enlarged view of the structure of region B in the middle;

[0018] Figure 4 This is a schematic diagram showing the connection between the two rotating plates of this utility model.

[0019] In the diagram: 1. Slanted air duct; 2. Flange; 3. Slanted reinforcing frame; 4. Hinge; 5. Round hole; 6. Nut; 7. Connecting cylinder; 8. Sealing sleeve; 9. Connecting plate; 10. Arc-shaped hole; 11. Fixing bolt one; 12. Pressure strip; 13. Rotating plate; 14. Shaft; 15. Round rod; 16. Fixing hole; 17. Fixing bolt two. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Please see Figures 1 to 4 This utility model provides a technical solution: a flexible rigid dust extraction duct, comprising: a rigid duct, the rigid duct including a beveled duct 1 and a flange 2, the flange 2 being fixedly installed on one end side wall of the beveled duct 1, and a beveled reinforcing frame 3 being fixedly installed on the other end of the beveled duct 1, the beveled reinforcing frames 3 on two adjacent rigid ducts being rotatably connected by a rotating component, and several round holes 5 being provided on the four end side walls of the beveled reinforcing frame 3, and several nuts 6 being welded on the inner port side wall of each round hole 5, so as to facilitate the fixing of the pressure strip 12 and the connecting plate 9.

[0022] The rotating component includes a hinge 4, a connecting cylinder 7, and a rotating plate 13. The connecting arms at both ends of the hinge 4 are welded to the upper sidewalls of two adjacent inclined reinforcing frames 3. The two adjacent inclined reinforcing frames 3 and the inclined air duct 1 can rotate through the hinge 4. There are several connecting cylinders 7, which are fixedly welded to the lower sidewalls of the inclined reinforcing frames 3. There are several groups of rotating plates 13, with two plates in each group. The two rotating plates 13 are rotatably connected by a shaft 14. The two rotating plates 13 can rotate. A round rod 15 is welded to the end of each rotating plate 13 away from the shaft 14. The two round rods 15 on each group of rotating plates 13 are inserted into the connecting cylinders 7 on the two inclined reinforcing frames 3, allowing the two rigid air ducts to rotate upward and arch.

[0023] Sealing sleeves 8 are fitted onto the outer ends of two adjacent oblique reinforcing frames 3. The sealing sleeves 8 are orifice-shaped and fit onto the outer ends of the connection between the two oblique reinforcing frames 3. Each rotating plate 13 has a fixing hole 16 at its upper end. A fixing bolt 17 is inserted into the fixing hole 16 and fixed to the sealing sleeve 8 by the fixing bolt 17. Pressure strips 12 are installed on the upper and lower ends and the front and rear sides of the left and right ends of the sealing sleeve 8 by fixing bolt 11. The fixing bolt 11 passes through one end of the pressure strip 12 and the sealing sleeve 8 and is threaded to the inner wall of the nut 6. The inner end of the pressure strip 12 is in close contact with the outer end of the sealing sleeve 8. The pressure strips 12 on the left and right sides of the sealing sleeve 8 are in contact with the outer ends of the pressure strips 12 at the upper and lower ends to seal the connection.

[0024] Both ends of the sealing sleeve 8 are provided with connecting plates 9. One end of the connecting plate 9 is fixedly connected to the outer wall of one of the pressure strips 12 by a fixing bolt 11. The other end of the connecting plate 9 is slidably connected to the side wall of another inclined air duct 1. The other end of the connecting plate 9 is provided with an arc-shaped hole 10. One end of the fixing bolt 11 slides through the arc-shaped hole 10 and is threadedly connected to the inner wall of the nut 6. When the two rigid air ducts arch upward, the fixing bolt 11 slides in the arc-shaped hole 10.

[0025] When the connecting plate 9 is fixed, one end of the connecting plate 9 is fixedly connected to the pressure strip 12 at the front end of the sealing sleeve 8, and the other end of the connecting plate 9 is slidably connected to the pressure strip 12 at the rear end of the sealing sleeve 8. At this time, the fixing bolt 11 is located at the uppermost end of the arc hole 10, which horizontally supports the two inclined air ducts 1. Similarly, when the inclined air duct 1 is under force, the fixing bolt 11 will slide in the arc hole 10, causing the two inclined air ducts 1 to bend and arch upward.

[0026] When this device is working, after the roadheader reverses and drives the bridge frame to form an arch, the flexible rigid ventilation duct will rotate and bend along the axis to counteract the force acting on the ventilation duct flange 2. At this time, the sealing sleeve 8 will bend upward to form an arch, and the sealing sleeve 8 will fit tightly with the inclined reinforcing frame 3 to ensure the airtightness of the ventilation duct.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flexible rigid dust extraction duct, comprising: A rigid air duct, characterized in that: the rigid air duct includes a slanted air duct (1) and a flange (2), the flange (2) is fixedly installed on one end side wall of the slanted air duct (1), and a slanted reinforcing frame (3) is fixedly installed on the other end of the slanted air duct (1), and the slanted reinforcing frames (3) on two adjacent rigid air ducts are rotatably connected by a rotating component; The outer ends of two adjacent beveled reinforcing frames (3) are fitted with sealing sleeves (8). ， The sealing sleeve (8) is orifice-shaped. Pressure strips (12) are installed on the upper and lower ends and the front and rear sides of the left and right ends of the sealing sleeve (8) by fixing bolts (11). The inner end of the pressure strip (12) is in close contact with the outer end of the sealing sleeve (8). Connecting plates (9) are provided on both the left and right ends of the sealing sleeve (8). One end of the connecting plate (9) is fixedly connected to the outer wall of one of the pressure strips (12) by fixing bolts (11). The other end of the connecting plate (9) is slidably connected to the side wall of another inclined air duct (1).

2. The flexible rigid dust extraction duct according to claim 1, characterized in that: The oblique reinforcing frame (3) has several round holes (5) on its four end side walls, and several nuts (6) are welded to the inner end side wall of each round hole (5).

3. The flexible rigid dust extraction duct according to claim 1, characterized in that: The rotating component includes a hinge (4), a connecting cylinder (7), and a rotating plate (13). The connecting arms at both ends of the hinge (4) are respectively welded to the upper sidewalls of two adjacent inclined reinforcing frames (3). There are several connecting cylinders (7), which are fixedly welded to the lower sidewalls of the inclined reinforcing frames (3).

4. The flexible rigid dust extraction duct according to claim 3, characterized in that: The rotating plate (13) is provided in several groups, with two plates in each group. The two rotating plates (13) are rotatably connected by a shaft (14), and a round rod (15) is welded to the end of each rotating plate (13) away from the shaft (14).

5. A flexible rigid dust extraction duct according to claim 4, characterized in that: Two round rods (15) on each rotating plate (13) are inserted into the connecting tubes (7) on the two inclined reinforcing frames (3). Each rotating plate (13) has a fixing hole (16) at the top. A fixing bolt (17) is inserted into the fixing hole (16) and fixed to the sealing sleeve (8) by the fixing bolt (17).

6. A flexible rigid dust extraction duct according to claim 1, characterized in that: One end of the connecting plate (9) has an arc-shaped hole (10), and one end of the fixing bolt (11) slides through the arc-shaped hole (10) and is threaded to the inner wall of the nut (6).

7. A flexible rigid dust extraction duct according to claim 1, characterized in that: One end of the connecting plate (9) is fixedly connected to the pressure strip (12) at the front end of the sealing sleeve (8), and the other end of the connecting plate (9) is slidably connected to the pressure strip (12) at the rear end of the sealing sleeve (8).

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