Axial flow fan barrel connected with tunnel air duct cloth

Abstract

The utility model relates to the technical field of axial flow fans, in particular to an axial flow fan barrel connected with tunnel air duct cloth, the air duct cloth is connected to the air outlet end of the fan barrel, and the fan barrel comprises a silencing outer barrel and a silencing inner barrel arranged in the silencing outer barrel in a sleeved mode. A variable-diameter airflow diffusion section is formed between the silencing outer barrel and the silencing inner barrel towards the air outlet end, an airflow diffusion opening is formed in the air outlet end, the air outlet end of the fan barrel body is provided with a double-flange structure located on the silencing outer barrel, and the connecting end of the air barrel cloth and the fan barrel body comprises a steel wire ring body. A containing groove used for containing the steel wire ring body is formed between the double-flange structures, a detachable locking piece used for locking the double-flange structures and pressing the steel wire ring body is connected between the double-flange structures, and the fastening force of the locking piece is adjustable. According to the scheme, the diffusion efficiency of airflow can be improved, the service life of a product is prolonged, the installation and maintenance cost is reduced, and the connection stability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of axial flow fan, specifically provide a kind of axial flow fan barrel of connecting tunnel wind cloth. BACKGROUND

[0002] The axial flow fan includes a steel fan barrel, and the tunnel wind cloth is usually connected with the steel fan barrel and has been widely applied in the ventilation system of tunnels, underground projects, mines and buildings, mainly for air circulation, exhaust and dust prevention. The connection mode of the steel barrel and the wind cloth in the axial flow fan has an important influence on the overall stability, durability and safety of the system. At the same time, the diffusion efficiency of the joint between the steel barrel and the wind cloth is also crucial to the performance of the system.

[0003] At present, the connection mode between the steel barrel and the tunnel wind cloth is usually as follows: two layers of steel wire rings are welded at the air outlet end of the steel barrel, the steel wire ring two at the end of the wind cloth is clamped in the two layers of steel wire ring one, and then a mechanical clasp is used to clamp it, or the wind cloth is connected with the steel barrel by means of gluing or sewing. These connection modes have the following disadvantages:

[0004] 1) Loose connection: the traditional connection mode is prone to disconnection due to vibration, wind pressure and other factors, which affects the normal operation of the ventilation system;

[0005] 2) Poor sealing: some connection modes cannot achieve complete sealing, which may cause air leakage and affect the efficiency of the wind barrel;

[0006] 3) Complex installation and inconvenient maintenance: the traditional connection method has a complicated installation process, which requires more manpower and time, and is not convenient for disassembly and maintenance.

[0007] 4) Insufficient durability: uneven stress or material aging during use of the wind cloth may cause damage or failure of the connection part, increasing maintenance costs.

[0008] At the same time, the diffusion efficiency of the joint between the steel barrel and the wind cloth in the existing axial flow fan is also low. In view of the above problems, how to design an axial flow fan barrel for connecting tunnel wind cloth with stronger connection stability, better sealing, simpler installation and maintenance, lower cost and better diffusion efficiency is an urgent problem to be solved. INVENTION CONTENTS

[0009] The utility model provides an axial flow fan barrel for connecting tunnel wind cloth to solve the above problems, which can improve the stability and sealing of the connection between the fan barrel and the wind cloth, widen the application range and scene, reduce the installation and maintenance cost, and improve the diffusion efficiency of air flow through the double-flange structure.

[0010] The utility model provides a kind of axial fan cylinder of connecting tunnel air duct cloth, wherein air duct cloth is connected to the air outlet end of fan cylinder;Fan cylinder includes sound attenuation outer cylinder and sound attenuation inner cylinder which is sleeved in sound attenuation outer cylinder, and the air outlet end is formed into the airflow diffusion section of variable diameter between sound attenuation outer cylinder and sound attenuation inner cylinder and forms airflow diffusion port;The air outlet end of fan cylinder is provided with double flange structure on sound attenuation outer cylinder, and the connecting end of air duct cloth and fan cylinder includes wire coil body, and accommodating groove for accommodating wire coil body is arranged between double flange structure;Detachable locking member is connected between double flange structure, and it locks double flange structure and compresses wire coil body, and the fastening degree of locking member can be adjusted.

[0011] Further, the double flange structure includes cylinder flange and cloth connecting flange, and the cloth connecting flange is located between the cylinder flange and the air duct cloth;The accommodating groove is arranged at the lower end of the cloth connecting flange close to the cylinder flange.

[0012] Further, a plurality of evenly distributed mounting holes are arranged between the cylinder flange and the cloth connecting flange, and the locking member locks the cylinder flange and the cloth connecting flange at the mounting holes;The locking member includes a locking rod body arranged in the mounting hole, and the outer diameter of the locking rod body is smaller than the inner diameter of the mounting hole.

[0013] Further, the locking member further includes a fixing nut located at the outer end of the cylinder flange and an adjusting nut located at the outer end of the cloth connecting flange;The fixing nut is fixedly connected with the locking rod body, and the adjusting nut is movably connected with the locking rod body.

[0014] Further, a gasket is arranged between the outer end surface of the cloth connecting flange and the adjusting nut, and the gasket is a spring washer structure with an opening.

[0015] Further, the sound attenuation outer cylinder and the sound attenuation inner cylinder are connected through a support frame, and the support frame includes two groups arranged close to the air inlet end and the air outlet end of the fan cylinder respectively, and the two groups of support frames are evenly arranged.

[0016] Further, the sound attenuation inner cylinder is a conical body structure with gradually decreasing inner diameter from the air inlet end to the air outlet end of the fan cylinder.

[0017] Further, the cylinder wall of the sound attenuation inner cylinder is an arc surface structure, and the cylinder wall gradually decreases in diameter from the air inlet end to the air outlet end of the fan cylinder.

[0018] Further, the sound attenuation outer cylinder is an equal-diameter structure.

[0019] Further, the sound attenuation outer cylinder is a conical body structure with gradually increasing inner diameter from the air inlet end to the air outlet end of the fan cylinder.

[0020] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0021] 1. The utility model scheme can effectively enhance the connection stability between the fan drum and the fan cloth through the clamping effect of the double flange structure and the wind drum wire ring, prevent the loosening of the connection part and the falling of the fan cloth, have stronger corrosion resistance and shock resistance, can ensure the long-term stable operation of the tunnel ventilation system, improve the service life of the product, and the double flange structure can be suitable for various tunnel fan cloths, including larger or smaller diameter fan cloths, can adapt to various complex environments, and has stronger adaptability.

[0022] 2. The utility model scheme can enhance the sealing performance of the fan drum and the fan cloth connection part through the uniform stress of the double flange clamping and the steel wire ring, reduce air leakage, improve ventilation efficiency, at the same time, the bolt connection mode in the scheme makes the installation and maintenance of the product more convenient, can greatly reduce the labor cost and installation time, and can also adapt to various environments and working conditions.

[0023] 3. The design of the sound attenuation outer cylinder and the sound attenuation inner cylinder of the fan drum in the utility model scheme can improve the diffusion efficiency when airflow passes through, and further improve the overall static pressure efficiency of the axial flow fan. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a three-dimensional structure schematic view of the fan drum provided according to the utility model embodiment one;

[0025] Figure 2 It is a rear view of the fan drum provided according to the utility model embodiment one;

[0026] Figure 3 It is Figure 2 the sectional view in A-A direction;

[0027] Figure 4 It is a sectional view of the connection part of the fan cloth and the fan drum provided according to the utility model embodiment one (wherein S indicates the fan cloth);

[0028] Figure 5 It is an explosion view of the drum flange, cloth connecting flange and steel wire ring body provided according to the utility model embodiment one;

[0029] Figure 6 It is a local structure schematic view of the drum flange provided according to the utility model embodiment one;

[0030] Figure 7 It is Figure 6 the local enlarged view at D;

[0031] Figure 8 It is a three-dimensional structure schematic view of the fan drum provided according to the utility model embodiment two;

[0032] Figure 9is a rear view of the fan cylinder according to the second embodiment of the utility model;

[0033] Figure 10 is Figure 9 is a sectional view in the direction of B-B;

[0034] Figure 11 is a sectional view of the fan cylinder according to the third embodiment of the utility model;

[0035] Figure 12 is a sectional view of the fan cylinder according to the fourth embodiment of the utility model.

[0036] The reference signs in the drawings include: air outlet end 1, air inlet end 2, sound-absorbing outer cylinder 3, sound-absorbing inner cylinder 4, airflow diffusion section 5, airflow diffusion opening 6, accommodating groove 7, cylinder flange 8, cloth connecting flange 9, mounting hole 10, locking rod body 11, fixing nut 12, adjusting nut 13, gasket 14, opening 15, support frame 16, cylinder wall 17, airflow diffusion cusp 18, steel wire loop body 19, and drag reducer 20. DETAILED DESCRIPTION

[0037] In the following description, identical modules are denoted by identical reference signs. Figures 1-12 In the following description, identical modules are denoted by identical reference signs.

[0038] In order to make the purpose, technical scheme and advantages of the utility model more clear and intelligible, the utility model will be further described in detail below by combining with the drawings and specific embodiments. Figures 1-12 It should be understood that the specific embodiments described here are only used to explain the utility model and do not constitute a limitation on the utility model. Embodiment One

[0039] As shown in FIG. Figures 1 to 7 A kind of axial fan cylinder of coupling tunnel fan cloth, fan cloth is as shown in FIG. Figure 4 Fan cloth is connected at air outlet end 1 of fan cylinder, and fan cylinder includes sound-absorbing outer cylinder 3 and sound-absorbing inner cylinder 4 sleeved in sound-absorbing outer cylinder 3, sound-absorbing inner cylinder 4 is provided with drag reducer 20, sound-absorbing outer cylinder 3 and sound-absorbing inner cylinder 4 are connected by support frame 16, support frame 16 includes two groups of being arranged evenly and being close to air inlet end 2 and air outlet end 1 of fan cylinder respectively.

[0040] As shown in FIG. Figure 3 , Figure 1As shown, the flow direction of the airflow is shown as F direction, the variable-diameter airflow diffusion section 5 is formed between the muffling outer cylinder 3 and the muffling inner cylinder 4 towards the air outlet end 1, and the airflow diffusion opening 6 is formed at the air outlet end 1. In this embodiment, the muffling inner cylinder 4 is a tapered body structure with a gradually decreasing inner diameter from the air inlet end 2 towards the air outlet end 1 of the fan cylinder body, and the muffling outer cylinder 3 is an equal-diameter structure. Therefore, the inner diameter of the airflow diffusion section 5 gradually increases from the air inlet end 2 to the air outlet end 1, which can improve the efficiency of airflow diffusion and the pressure reduction efficiency of the fan.

[0041] As shown in Figure 1 , Figure 4 , the air outlet end 1 of the fan cylinder body is provided with a double-flange structure on the muffling outer cylinder 3, and the connection end of the air duct cloth and the fan cylinder body includes a steel ring body 19 arranged on the air duct cloth. The double-flange structure is provided with a receiving groove 7 for accommodating the steel ring body 19, and the double-flange structure includes a cylinder flange 8 and a cloth connecting flange 9. The cloth connecting flange 9 is located between the cylinder flange 8 and the air duct cloth, and the receiving groove 7 is arranged at the lower end of the cloth connecting flange 9 close to the cylinder flange 8. The design of the receiving groove 7 is customized according to the thickness of the air duct cloth, the size of the steel ring body 19 and the overall structure. The depth and width of the receiving groove 7 are designed to ensure that the steel ring body 19 can tightly wrap the air duct cloth and effectively fix it.

[0042] The double-flange structure and the receiving groove 7 can clamp the steel ring body 19, effectively disperse external force and enhance the tensile strength of the air duct cloth, prevent the air duct cloth from loosening or breaking due to wind pressure, vibration and other factors, and ensure the tight fit between the steel ring body 19 and the air duct cloth. The clamping effect is enhanced, the stability of the connection is improved, the steel ring body 19 can be made of stainless steel or other metal materials with high strength and corrosion resistance, the steel ring body 19 has a certain elasticity and tensile capacity, can effectively bear the tension of the air duct cloth, can adapt to complex environments such as tunnels and mines, has strong corrosion resistance and temperature resistance, can ensure the stability during long-term use, and reduce airflow leakage.

[0043] The double-flange structure is connected with a detachable locking member for locking the double-flange structure and pressing the steel ring body 19. The locking force of the locking member can be adjusted. A plurality of evenly distributed mounting holes 10 are matched and arranged between the cylinder flange 8 and the cloth connecting flange 9. The locking member locks the cylinder flange 8 and the cloth connecting flange 9 at the mounting holes 10, as shown in Figure 6 , Figure 7 , the locking member includes a locking rod body 11 arranged in the mounting hole 10. The outer diameter of the locking rod body 11 is smaller than the inner diameter of the mounting hole 10, so that the locking rod body 11 can be stretched and contracted in the mounting hole 10 to adjust the locking force between the cylinder flange 8 and the air duct cloth. The locking member further includes a fixed nut 12 at the outer end of the cylinder flange 8 and an adjusting nut 13 at the outer end of the cloth connecting flange 9.

[0044] The fixed nut 12 is fixedly connected with the locking rod body 11, the adjusting nut 13 is movably connected with the locking rod body 11, and the fastening degree between the cylinder flange 8 and the cloth of the air duct is realized by rotating the adjusting nut 13 to make the adjusting rod body 11 extend and retract in the mounting hole 10. At the same time, as shown in the drawings, the outer end surface of the cloth flange 9 is provided with a gasket 14 between the adjusting nut 13, the gasket 14 is a spring gasket structure with an opening 15, the opening 15 can increase the friction, reduce the pressure, protect the parts, prevent the adjusting rod body 11 from exiting and loosening, and the air duct cloth is fixed by screwing, so that the installation process is fast and no additional tools or equipment are needed, and the cloth can be easily loosened when disassembled, reducing the time and cost of manual disassembly. Figure 7 Embodiment Two

[0045] The difference between this embodiment and embodiment one is that, as shown in the drawings, the sound-attenuating outer cylinder 3 is a conical body structure with gradually increasing inner diameter from the air inlet end 2 of the fan cylinder body to the air outlet end 1, so that the inner diameter of the airflow diffusion section 5 gradually increases from the air inlet end 2 to the air outlet end 1 and is larger than that in embodiment one, which can further improve the efficiency of airflow diffusion and the pressure reduction efficiency of the fan. Figures 8 to 10 Embodiment Three The difference between this embodiment and embodiment one is that, as shown in the drawings, the cylinder wall 17 of the sound-attenuating inner cylinder 4 is an arc surface structure, and the cylinder wall 17 gradually reduces in diameter from the air inlet end 2 of the fan cylinder body to the air outlet end 1, the sound-attenuating inner cylinder 4 is connected with a flow reducer 20, the outer wall of the flow reducer 20 is an arc segment structure corresponding to the cylinder wall 17, and the flow reducer 20 forms an airflow diffusion sharp point 18 at the outlet end. The arc segment structure of the cylinder wall 17 can facilitate smooth airflow, and the arc segment structure of the cylinder wall 17, the flow reducer 20 and the airflow diffusion sharp point 18 can greatly increase the inner diameter of the airflow diffusion section 5, further improving the efficiency of airflow diffusion and the pressure reduction efficiency of the fan.

[0046] Embodiment Four Figure 11 The difference between this embodiment and embodiment three is that, as shown in the drawings, the sound-attenuating outer cylinder 3 is a conical body structure with gradually increasing inner diameter from the air inlet end 2 of the fan cylinder body to the air outlet end 1, and the sound-attenuating outer cylinder 3 and the sound-attenuating inner cylinder 4 are matched through the conical body structure, and the arc segment structure of the cylinder wall 17, the flow reducer 20 and the airflow diffusion sharp point 18 can greatly increase the inner diameter of the airflow diffusion section 5, further improving the efficiency of airflow diffusion and the pressure reduction efficiency of the fan.

[0047] Figure 12

[0048] ​​​​Although the embodiments of the present application have been shown and described above, it should be understood by those skilled in the art that the above embodiments are exemplary and should not be construed as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

[0049] The specific embodiments of the present application described above do not constitute a limitation on the scope of protection of the present application. Any other corresponding changes and modifications made according to the technical concept of the present application should be included in the scope of protection of the present application.

Claims

1. A ducted axial fan housing for coupling to a tunnel duct cloth, characterised in that, The air duct cloth is connected to the air outlet end (1) of the fan barrel; the fan barrel comprises a sound-attenuating outer barrel (3) and a sound-attenuating inner barrel (4) sleeved in the sound-attenuating outer barrel (3), a variable-diameter airflow diffusion section (5) is formed between the sound-attenuating outer barrel (3) and the sound-attenuating inner barrel (4) towards the air outlet end (1), and an airflow diffusion opening (6) is formed at the air outlet end (1); the air outlet end (1) of the fan barrel is provided with a double-flange structure on the sound-attenuating outer barrel (3), the connecting end of the fan barrel and the air duct cloth comprises a steel wire ring body (19), and an accommodating groove (7) for accommodating the steel wire ring body (19) is arranged between the double-flange structure; a detachable locking piece for locking the double-flange structure and pressing the steel wire ring body (19) is connected between the double-flange structure, and the locking force of the locking piece is adjustable.

2. The axial fan casing coupled with the tunnel duct cloth according to claim 1, characterized in that, The double-flange structure comprises a barrel flange (8) and a cloth connecting flange (9), and the cloth connecting flange (9) is located between the barrel flange (8) and the air duct cloth; the accommodating groove (7) is arranged at the lower end of the cloth connecting flange (9) close to the barrel flange (8).

3. The axial fan casing coupled with the tunnel duct cloth according to claim 2, characterized in that, A plurality of uniformly distributed mounting holes (10) are arranged between the barrel flange (8) and the cloth connecting flange (9), and the locking piece locks the barrel flange (8) and the cloth connecting flange (9) at the mounting holes (10); the locking piece comprises a locking rod body (11) penetrating the mounting hole (10), and the outer diameter of the locking rod body (11) is smaller than the inner diameter of the mounting hole (10).

4. The axial fan casing coupled with the tunnel duct cloth according to claim 3, characterized in that, The locking piece further comprises a fixed nut (12) located at the outer end of the barrel flange (8) and an adjusting nut (13) located at the outer end of the cloth connecting flange (9); the fixed nut (12) is fixedly connected with the locking rod body (11), and the adjusting nut (13) is movably connected with the locking rod body (11).

5. The axial fan casing coupled with the tunnel duct cloth according to claim 4, characterized in that, A gasket (14) is arranged between the outer end surface of the cloth connecting flange (9) and the adjusting nut (13), and the gasket (14) is a spring gasket structure with an opening (15).

6. The axial fan casing coupled with the tunnel duct cloth according to claim 5, characterized in that, The sound-attenuating outer barrel (3) and the sound-attenuating inner barrel (4) are connected through a support frame (16), the support frame (16) comprises two groups arranged close to the air inlet end (2) and the air outlet end (1) of the fan barrel respectively, and the two groups of support frames (16) are uniformly arranged.

7. The axial fan casing coupled with the tunnel duct cloth according to claim 5, characterized in that, The sound-attenuating inner barrel (4) is a conical body structure with a gradually reduced inner diameter from the air inlet end (2) to the air outlet end (1) of the fan barrel.

8. The axial fan casing coupled with the tunnel duct cloth according to claim 5, characterized in that, The barrel wall (17) of the sound-attenuating inner barrel (4) is an arc surface structure, and the barrel wall (17) gradually reduces in diameter from the air inlet end (2) to the air outlet end (1) of the fan barrel.

9. The axial fan casing of claim 7 or 8, wherein, The sound-attenuating outer barrel (3) is a constant-diameter structure.

10. The axial fan casing of claim 7 or 8, wherein, The sound-attenuating outer barrel (3) is a conical body structure with a gradually increased inner diameter from the air inlet end (2) to the air outlet end (1) of the fan barrel.

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