CN217055722U - Mining low-noise local ventilator capable of quickly replacing noise reduction layer - Google Patents

Abstract

The utility model relates to a but mining low noise auxiliary ventilating fan on quick replacement amortization layer belongs to ventilation blower technical field. Through setting up the import muffler, import current stabilizer, the one-level host computer, the outer steel sheet and the middle layer steel sheet of second grade host computer and export muffler are connected with respective preceding connecting cylinder body and back connecting cylinder body, the connection can be dismantled through respective detachable construction to the inlayer noise reduction orifice plate, make the sound attenuation structure be full cladding structure, ensure to control whole air current noise and motor self noise, when having strengthened sound absorption noise reduction effect, can dismantle down the inlayer noise reduction orifice plate as required at any time and clear up and change the noise reduction layer, realize the reuse on noise reduction layer. Through setting up a plurality of net units of dividing into in the inner layer amortization orifice plate to place the amortization layer in every net unit, realized that the amortization layer fills net unit modularization, make the simple operation on later maintenance, dismouting, change amortization layer.

Description

Mining low-noise local ventilator capable of quickly replacing noise reduction layer

Technical Field

The utility model relates to a ventilation blower technical field especially relates to a but mining low noise auxiliary ventilating fan on quick replacement amortization layer.

Background

The local ventilator has the functions that in the production process of a mine, fresh air on the ground must be continuously conveyed to an underground tunneling working face to be supplied to personnel for breathing, diluting and removing various underground toxic and harmful gases and mine dust, a good working environment is created, and the health and the safety of underground operators are guaranteed. The noise value of the existing local ventilator in the underground use environment usually reaches 100 plus 120 decibels, greatly exceeds the noise standard specified by the industry, becomes one of main noise sources in a mine, has certain influence on the physical and psychological health of coal mine workers working in the mine for a long time, and further improves the production efficiency. In addition, the underground working environment is moist, coal dust and dust are large, and after the local ventilator works for a period of time, a thick coal layer covers the sound attenuation pore plate and the mineral wool, so that the noise reduction capability of the sound attenuation layer is greatly reduced, and the mining low-noise local ventilator capable of quickly replacing the sound attenuation layer becomes necessary equipment for a mine.

The structure of the low-noise local ventilator on the market at present is shown in fig. 1, and comprises a current collector 100, a preposed silencer 200, a primary main machine 300, a secondary main machine 400 and an outlet silencer 500, wherein the noise control adopts a half-coating silencing structure, a silencing pore plate is used as an inner shell of the silencing structure, a steel plate is used as an outer shell of the silencing structure, and silencing cotton is filled between the inner shell and the outer shell. The sound wave is controlled by the heat energy converted from the friction between the sound-deadening pore plate and the sound-deadening cotton. The existing local ventilator has the following defects:

(1) the noise of the local ventilator is derived from aerodynamic noise and mechanical noise. The mechanical noise includes electromagnetic sound of the drive motor and radiation noise of the housing. To effectively control the noise of the local fan, the noise source is first controlled. The motor part of the existing local ventilator adopts the outer package to lay the silencing cotton, and the shell part at the impeller is not laid by the silencing cotton, so that the local ventilator can only control partial airflow noise and the noise of the motor.

(2) The radiation noise parts of the local ventilator are mainly an air inlet, an air outlet and a casing. Noise control of the local fan is therefore implemented in the propagation path, taking into account the radiation of the inlet, outlet and housing. Although the existing local ventilator in the market is correspondingly controlled at the air inlet and the air outlet, as the service life increases, a layer of coal dust or dust covers a fan flow channel, sound waves cannot be converted into heat energy for dissipation through the friction of gaps between the silencing hole plate and the silencing cotton, even if the fan is maintained periodically, the surface coal dust and dust are brushed away by using a brush, the gaps between the silencing cotton below the silencing hole plate are filled with the coal dust, and the original silencing effect cannot be achieved.

(3) The silencing hole plate and the silencing cotton of the existing local ventilator are spot-welded on the connecting cylinder body, and the silencing cotton cannot be freely detached and replaced.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a but mining low noise auxiliary ventilating fan on quick replacement amortization layer. The technical scheme of the utility model as follows:

a mining low-noise local ventilator with a quickly replaceable muffling layer comprises a current collector, an inlet muffler, an inlet current stabilizer, a first-stage host, a second-stage host and an outlet muffler which are sequentially connected from left to right, wherein the muffling structures of the inlet muffler, the inlet current stabilizer, the first-stage host, the second-stage host and the outlet muffler comprise an outer steel plate, a middle steel plate and an inner muffling pore plate, the muffling layer is filled between the outer steel plate and the middle steel plate, the middle steel plate and the inner muffling pore plate are divided into a plurality of grid units by axial rib plates and radial rib plates of the mining low-noise local ventilator, the muffling layer is arranged in each grid unit, the outer steel plates and the middle steel plates of the inlet muffler, the inlet current stabilizer, the first-stage host, the second-stage host and the outlet muffler are fixedly connected with a front connecting cylinder and a rear connecting cylinder respectively, the inlet muffler, The inner layer silencing pore plates of the inlet current stabilizer, the primary host, the secondary host and the outlet silencer are detachably connected with the front connecting cylinder and the rear connecting cylinder respectively through respective detachable structures.

Optionally, the fairing of the current collector is hyperbolic.

Optionally, the detachable structures of the inlet silencer, the inlet current stabilizer, the primary host, the secondary host and the outlet silencer respectively comprise a hole plate clamp and a hole plate pressing strip, the hole plate clamp is welded on an axial rib plate between the respective front connecting cylinder and the rear connecting cylinder, the hole plate pressing strip is connected with the respective front connecting cylinder and the rear connecting cylinder through bolts, and the inner-layer silencing hole plate is connected with the hole plate pressing strip through bolts after being pressed through the hole plate clamping strip.

Optionally, the inlet current stabilizer includes a front connection cylinder of the inlet current stabilizer, a rear connection cylinder of the inlet current stabilizer, a cylindrical inner core, an outer steel plate of the inlet current stabilizer, a middle steel plate of the inlet current stabilizer, and an inner silencing orifice plate of the inlet current stabilizer, the front connection cylinder of the inlet current stabilizer is connected with the rear connection cylinder of the inlet silencer, the rear connection cylinder of the inlet current stabilizer is connected with the front connection cylinder of the primary host, the cylindrical inner core is installed in the middle of the inlet current stabilizer, two ends of the outer steel plate of the inlet current stabilizer and two ends of the middle steel plate of the inlet current stabilizer are respectively fixedly connected with the front connection cylinder of the inlet current stabilizer and the rear connection cylinder of the inlet current stabilizer, and two ends of the inner silencing orifice plate of the inlet current stabilizer are detachably connected with the front connection cylinder of the inlet current stabilizer and the rear connection cylinder of the inlet current stabilizer through detachable structures.

Optionally, the sound damping layer comprises two layers of sound insulation boards and sound damping cotton, the sound damping cotton being disposed between the two layers of sound insulation boards.

Optionally, the acoustic panel is a rubber panel.

All above-mentioned optional technical scheme all can make up wantonly, the utility model discloses do not carry out the detailed description to the structure after the one-by-one combination.

Borrow by above-mentioned scheme, the utility model discloses a set up the outer steel sheet and the well intermediate layer steel sheet of import muffler, import current stabilizer, one-level host computer, second grade host computer and export muffler and connect barrel fixed connection with respective preceding connecting cylinder body, the inlayer amortization orifice plate can dismantle with the rear connection cylinder body through respective detachable construction and respective preceding connecting cylinder body and be connected, makes the utility model discloses amortization structure is full cladding structure, ensures to control whole air current noise and motor self noise, has strengthened the sound absorption and has fallen the effect of making an uproar. The inner layer silencing hole plate with the inlet silencer, the inlet current stabilizer, the primary host, the secondary host and the outlet silencer is detachably connected with the front connecting cylinder and the rear connecting cylinder through respective detachable structures, so that the inner layer silencing hole plate can be detached at any time to clean and replace a silencing layer as required, the reutilization of the silencing layer can be realized, and the later-period maintenance inner layer silencing hole plate and the replacement of the silencing layer are convenient and fast. Through adopting the amortization structure including outer steel sheet, middle level steel sheet and inlayer amortization orifice plate, changed amortization layer filling layer, strengthened the sound absorption noise reduction effect. Through setting up between middle level steel sheet and the inlayer noise damping orifice plate and utilizing axial gusset and the radial gusset of mining low noise auxiliary ventilating fan self to divide into a plurality of net units to place the noise damping layer in every net unit, realized that the noise damping layer fills net unit modularization, make the simple operation on later maintenance, dismouting, change noise damping layer.

The above description is only an outline of the technical solution of the present invention, and in order to make the technical means of the present invention more clearly understood and to be implemented in accordance with the content of the specification, the following detailed description will be given of preferred embodiments of the present invention in conjunction with the accompanying drawings.

Drawings

Fig. 1 is a schematic view of a current low-noise local ventilator.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic view of the structure of the inlet muffler of fig. 2.

Fig. 4 is a schematic structural view of the inlet flow stabilizer in fig. 2.

Fig. 5 is a schematic diagram of the primary host in fig. 2.

Fig. 6 is a schematic diagram of the structure of the secondary host in fig. 2.

Fig. 7 is a schematic view of the structure of the outlet muffler of fig. 2.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 2, the mining low-noise local ventilator capable of rapidly replacing the noise damping layer provided by the embodiment of the invention comprises a current collector 1, an inlet silencer 2, an inlet current stabilizer 3, a primary host 4, a secondary host 5 and an outlet silencer 6 which are sequentially connected from left to right, wherein the noise damping structures of the inlet silencer 2, the inlet current stabilizer 3, the primary host 4, the secondary host 5 and the outlet silencer 6 comprise an outer steel plate, a middle steel plate and an inner noise damping pore plate, the noise damping layer is filled between the outer steel plate and the middle steel plate, the middle steel plate and the inner noise damping pore plate are divided into a plurality of grid units by using the axial rib plate and the radial rib plate of the mining low-noise local ventilator, the noise damping layer is arranged in each grid unit, the outer steel plate and the middle steel plate of the inlet silencer 2, the inlet current stabilizer 3, the primary host 4, the secondary host 5 and the outlet silencer 6 are fixedly connected with the respective front connecting cylinder and the rear connecting cylinder, the inner layer silencing orifice plates of the inlet silencer 2, the inlet current stabilizer 3, the primary host 4, the secondary host 5 and the outlet silencer 6 are detachably connected with the front connecting cylinder and the rear connecting cylinder through respective detachable structures.

Specifically, an outer layer steel plate and a middle layer steel plate of the inlet silencer 2 are fixedly connected with a front connecting cylinder 2-1 of the inlet silencer and a rear connecting cylinder 2-2 of the inlet silencer. The outer layer steel plate and the middle layer steel plate of the inlet current stabilizer 3 are fixedly connected with the front connecting cylinder 3-1 of the inlet current stabilizer and the rear connecting cylinder 3-2 of the inlet current stabilizer. The outer layer steel plate and the middle layer steel plate of the primary host 4 are fixedly connected with the front connecting cylinder of the primary host and the rear connecting cylinder of the primary host. The outer layer steel plate and the middle layer steel plate of the secondary host 5 are fixedly connected with the front connecting cylinder of the secondary host and the rear connecting cylinder of the secondary host. The outer layer steel plate and the middle layer steel plate of the outlet silencer 6 are fixedly connected with the front connecting cylinder 6-1 of the outlet silencer and the rear connecting cylinder 6-2 of the outlet silencer.

The inner layer sound-deadening pore plate of the inlet silencer 2 is detachably connected with the front connecting cylinder 2-1 of the inlet silencer and the rear connecting cylinder 2-2 of the inlet silencer through detachable structures. The inner layer silencing orifice plate of the inlet current stabilizer 3 is detachably connected with the front connecting cylinder 3-1 of the inlet current stabilizer and the rear connecting cylinder 3-2 of the inlet current stabilizer through the detachable structure. The inner layer silencing hole plate of the primary host 4 is detachably connected with the front connecting cylinder of the primary host and the rear connecting cylinder of the primary host through detachable structures. The inner layer silencing hole plate of the secondary host 5 is detachably connected with the front connecting cylinder of the secondary host and the rear connecting cylinder of the secondary host through detachable structures. The inner layer silencing orifice plate of the outlet silencer 6 is detachably connected with the front connecting cylinder 6-1 of the outlet silencer and the rear connecting cylinder 6-2 of the outlet silencer through detachable structures.

Outer steel sheet and middle level steel sheet through setting up import muffler 2, import current stabilizer 3, one-level host computer 4, second grade host computer 5 and export muffler 6 and respective preceding connecting cylinder body and back connecting cylinder body fixed connection, the inlayer amortization orifice plate can be dismantled with respective preceding connecting cylinder body and back connecting cylinder body through respective detachable construction and be connected, makes the utility model discloses amortization structure is full cladding structure, ensures to control whole air current noise and motor self noise, has strengthened the sound absorption noise reduction effect. Through setting up import muffler 2, import current stabilizer 3, one-level host computer 4, the inlayer amortization orifice plate of second grade host computer 5 and export muffler 6 can dismantle through respective detachable construction and the barrel is connected with the back before respective and is connected the barrel and be connected, make can dismantle the inlayer amortization orifice plate at any time as required and clear up and change the amortization layer, can not only realize the reuse on amortization layer, make the later maintenance inlayer amortization orifice plate moreover, change amortization layer convenient and fast. Through adopting the amortization structure including outer steel sheet, middle level steel sheet and inlayer amortization orifice plate, changed the cotton filling layer of amortization, strengthened the sound absorption noise reduction effect. Through setting up between middle level steel sheet and the inlayer amortization orifice plate and utilizing axial gusset and the radial gusset of mining low noise auxiliary ventilating fan self to divide into a plurality of net units to place the amortization layer in every net unit, realized that the amortization layer fills net unit modularization, make the simple operation of later maintenance, dismouting, change amortization cotton.

Optionally, the fairing of the collector 1 is hyperbolic. The fairing through setting up current collector 1 is hyperboloid shape, makes current collector 1 adopt the anchor ring air inlet, and the impact of air current can be reduced to traditional straight air inlet relatively, and the guide air current impels in order, reduces air current impulsive noise to the cooperation is imported the current regulator, makes the air current can steadily get into one-level host computer 4 and second grade host computer 5 evenly.

Optionally, the sound damping layer comprises two layers of sound insulation boards and sound damping cotton, the sound damping cotton being disposed between the two layers of sound insulation boards. Through setting up the amortization layer and including two-layer acoustic celotex board and amortization cotton, further isolation noise through the acoustic celotex board when the cotton noise elimination of amortization has improved holistic amortization and isolation noise's effect. Preferably, the sound insulation board is a rubber board, which is economical and practical and has good noise reduction effect.

The embodiment of the utility model provides an in import muffler 2, import current stabilizer 3, one-level host computer 4, second grade host computer 5 and export muffler 6, except their amortization structure and present low noise auxiliary ventilating fan's amortization structure different, all the other structures are the same basically.

As shown in fig. 3, it is a schematic structural diagram of an inlet muffler 2 according to an embodiment of the present invention. The inlet silencer 2 comprises an inlet silencer front connecting cylinder 2-1, an inlet silencer rear connecting cylinder 2-2, a truncated cone-shaped inner core 2-3, an inlet silencer outer steel plate 2-7, an inlet silencer middle steel plate 2-8, an inlet silencer inner sound-deadening pore plate 2-9, an inlet silencer front supporting plate 2-4 and an inlet silencer rear supporting plate 2-5, the inlet silencer front supporting plate 2-4 and the inlet silencer rear supporting plate 2-5 are respectively connected with a current collector 1 and an inlet current stabilizer 3, and the inlet silencer front connecting cylinder 2-1 and the inlet silencer rear connecting cylinder 2-2 are respectively connected with the current collector 1 rear connecting cylinder and the inlet current stabilizer front connecting cylinder 3-1.

As shown in fig. 4, it is a schematic structural diagram of an inlet current regulator provided in an embodiment of the present invention. The inlet current stabilizer 3 comprises a front connecting cylinder 3-1 of the inlet current stabilizer, a rear connecting cylinder 3-2 of the inlet current stabilizer, a cylindrical inner core 3-3, an outer layer steel plate 3-7 of the inlet current stabilizer, a middle layer steel plate 3-8 of the inlet current stabilizer and an inner layer silencing orifice plate 3-9 of the inlet current stabilizer, wherein the front connecting cylinder 3-1 of the inlet current stabilizer is connected with the rear connecting cylinder 2-2 of the inlet silencer, the rear connecting cylinder 3-2 of the inlet current stabilizer is connected with the front connecting cylinder of the primary host 4, the cylindrical inner core 3-3 is arranged in the middle of the inlet current stabilizer 3, two ends of the outer layer steel plate 3-7 of the inlet current stabilizer and the middle layer steel plate 3-8 of the inlet current stabilizer are fixedly connected with the front connecting cylinder 3-1 of the inlet current stabilizer and the rear connecting cylinder 3-2 of the inlet current stabilizer respectively, two ends of an inner layer silencing orifice plate 3-9 of the inlet current stabilizer are detachably connected with a front connecting cylinder 3-1 of the inlet current stabilizer and a rear connecting cylinder 3-2 of the inlet current stabilizer through detachable structures.

As shown in fig. 5 and fig. 6, which are schematic structural diagrams of the primary host and the secondary host provided by the embodiment of the present invention, respectively. In the primary main unit 4 and the secondary main unit 5, except that the noise reduction structures thereof are different from those of the conventional low-noise local ventilation fan, the other structures are substantially the same, and the detailed description of each part in the primary main unit 4 and the secondary main unit 5 is omitted in this embodiment. The outer steel sheet of one-level host computer and the middle level steel sheet both ends of one-level host computer respectively with the preceding connecting cylinder body of one-level host computer and the back connecting cylinder body fixed connection of one-level host computer, the inlayer amortization orifice plate both ends of one-level host computer are connected with the preceding connecting cylinder body of one-level host computer and the back connecting cylinder body of one-level host computer can dismantle through detachable construction. The outer steel sheet of second grade host computer and the middle level steel sheet both ends of second grade host computer are connected barrel fixed connection with the back of the preceding connecting cylinder body of second grade host computer and second grade host computer respectively, and the inlayer noise damping orifice plate both ends of second grade host computer are passed through detachable construction and are connected with the preceding connecting cylinder body of second grade host computer and the back of second grade host computer is connected the barrel and can dismantle.

As shown in fig. 7, which is a schematic structural diagram of the outlet muffler 6 according to an embodiment of the present invention. The outlet silencer 6 comprises an outlet silencer front connecting cylinder 6-1, an outlet silencer rear connecting cylinder 6-2, an outlet inner core 6-3, an outlet silencer outer steel plate 6-7, an outlet silencer middle steel plate 6-8, an outlet silencer inner sound-deadening pore plate 6-9, an outlet silencer front supporting plate 6-4 and an outlet silencer rear supporting plate 6-5, the outlet silencer front supporting plate 6-4 is connected with the secondary host 5, the outlet silencer front connecting cylinder 6-1 is connected with the secondary host 5 rear connecting cylinder, the outlet silencer outer steel plate 6-7 and the outlet silencer middle steel plate 6-8 both ends are respectively fixedly connected with the outlet silencer front connecting cylinder 6-1 and the outlet silencer rear connecting cylinder 6-2, two ends of an inner layer sound-deadening pore plate 6-9 of the outlet silencer are detachably connected with a front connecting cylinder 6-1 of the outlet silencer and a rear connecting cylinder 6-2 of the outlet silencer through detachable structures.

Optionally, the detachable structures of the inlet silencer 2, the inlet current stabilizer 3, the primary main unit 4, the secondary main unit 5 and the outlet silencer 6 include a hole plate clamp and a hole plate pressing strip, the hole plate clamp is welded on an axial rib plate between the respective front connecting cylinder and the rear connecting cylinder, the hole plate pressing strip is connected with the respective front connecting cylinder and the rear connecting cylinder through bolts, and the inner-layer silencing hole plate is connected with the hole plate pressing strip through bolts after being pressed through the hole plate clamp. The hole board cards are T-shaped, and the inlet silencer 2, the inlet flow stabilizer 3, the primary host 4, the secondary host 5 and the outlet silencer 6 are respectively provided with four hole board cards for pressing four corners of inner-layer silencing hole boards respectively.

That is, the orifice plate clamp of the inlet silencer 2 is welded on the axial rib plate between the front connecting cylinder 2-1 of the inlet silencer and the rear connecting cylinder 2-2 of the inlet silencer, and the orifice plate pressing strip 2-6 of the inlet silencer is connected with the front connecting cylinder 2-1 of the inlet silencer and the rear connecting cylinder 2-2 of the inlet silencer through bolts. The orifice plate of the inlet current stabilizer 3 is clamped and welded on an axial rib plate between the front connecting cylinder 3-1 of the inlet current stabilizer and the rear connecting cylinder 3-2 of the inlet current stabilizer, and the orifice plate pressing strip 3-6 of the inlet current stabilizer is connected with the front connecting cylinder 3-1 of the inlet current stabilizer and the rear connecting cylinder 3-2 of the inlet current stabilizer through bolts. The pore plate clamp of the primary host machine is welded on the axial rib plate between the front connecting cylinder of the primary host machine and the rear connecting cylinder of the primary host machine, and the pore plate pressing strip of the primary host machine is connected with the front connecting cylinder of the primary host machine and the rear connecting cylinder of the primary host machine through bolts. The pore plate clamp of the secondary host machine is welded on the axial rib plate between the front connecting cylinder of the secondary host machine and the rear connecting cylinder of the secondary host machine, and the pore plate pressing strip of the secondary host machine is connected with the front connecting cylinder of the secondary host machine and the rear connecting cylinder of the secondary host machine through bolts. The orifice plate clamp of the outlet silencer 6 is welded on the axial rib plate between the front connecting cylinder 6-1 of the outlet silencer and the rear connecting cylinder 6-2 of the outlet silencer, and the orifice plate pressing strip 6-6 of the outlet silencer is connected with the front connecting cylinder 6-1 of the outlet silencer and the rear connecting cylinder 6-2 of the outlet silencer through bolts.

On the basis, if the inner layer silencing hole plates and the silencing layers of all the parts need to be replaced and disassembled in the later period, the hole plate pressing strips can be disassembled only by disassembling the corresponding bolts, and the inner layer silencing hole plates can be pulled out to replace the silencing layers, so that the silencing device can be repeatedly operated and reused, and the raw material cost is saved.

The utility model discloses on the way that the inside air current of auxiliary ventilating fan passes through, install inlayer noise elimination orifice plate and amortization layer additional, increase inlayer noise elimination orifice plate aperture simultaneously and increase sound absorbing area, because there is the cavity that has numerous tiny lining up each other in the noise elimination in situ portion, the surface of inciting into these materials as the sound wave, and then when inciting into in these tiny holes, arouse the air motion in the hole, near the air on pore wall and fibrous surface, be difficult for the motion because of friction and viscous motion resistance, utilize the noise elimination layer to turn into heat energy with the frictional and damping of sound wave and consume, reach the noise elimination purpose. Meanwhile, the enclosure is considered to be soundproof and noise-reducing, the silencing structure is double-layer, and the enclosure adopts a full-coating structure for silencing. Considering the rapidness and convenience of replacing the silencing layer after long-term use, the inner silencing hole plate in the flow channel adopts a bolt fixing mode, and the silencing layer below the inner silencing hole plate is filled in a grid module mode. The utility model has the characteristics of as follows:

(1) the porosity of the inner-layer silencing pore plate is increased from 50% to 70% (compared with the inner-layer pore plate of the existing local ventilator, the pore diameter is increased), and the wavelength absorption of different frequency bands is increased;

(2) the casing adopts a fully-wrapped double-layer casing, and multiple sound insulation further reduces noise;

(3) optimizing the air flow path, thereby reducing aerodynamic noise;

(4) the fixing mode of the silencing hole plate on the inner layer of the flow channel is bolt fixing, and the silencing layer can be disassembled and updated for multiple times;

(5) the silencing layer is filled with the modularization of grid units, and is more convenient for later maintenance, disassembly and assembly and replacement.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (6)

1. The mining low-noise local ventilator with the muffling layer capable of being replaced quickly is characterized by comprising a current collector (1), an inlet muffler (2), an inlet current stabilizer (3), a first-stage host (4), a second-stage host (5) and an outlet muffler (6) which are sequentially connected from left to right, wherein the muffling structures of the inlet muffler (2), the inlet current stabilizer (3), the first-stage host (4), the second-stage host (5) and the outlet muffler (6) respectively comprise an outer-layer steel plate, a middle-layer steel plate and an inner-layer muffling pore plate, the muffling layer is filled between the outer-layer steel plate and the middle-layer steel plate, a plurality of grid units are divided by axial rib plates and radial rib plates of the mining low-noise local ventilator by utilizing the middle-layer steel plate and the inner-layer muffling pore plate, the muffling layer is arranged in each grid unit, the inlet muffler (2), the inlet current stabilizer (3) and the first-stage host (4) are arranged in each grid unit, Outer steel plates and middle steel plates of the secondary host (5) and the outlet silencer (6) are fixedly connected with the front connecting cylinder and the rear connecting cylinder respectively, and inner silencing hole plates of the inlet silencer (2), the inlet current stabilizer (3), the primary host (4), the secondary host (5) and the outlet silencer (6) are detachably connected with the front connecting cylinder and the rear connecting cylinder respectively through detachable structures respectively.

2. The mining low-noise local ventilator with a quick-replaceable sound-deadening layer according to claim 1, characterized in that the cowling of the collector (1) is hyperboloid.

3. The mining low-noise local ventilator with the quickly replaceable muffling layer according to claim 1, wherein the detachable structures of the inlet muffler (2), the inlet current stabilizer (3), the primary host (4), the secondary host (5) and the outlet muffler (6) comprise a hole plate clamp and a hole plate pressing strip, the hole plate clamp is welded on an axial rib plate between the respective front connecting cylinder and the rear connecting cylinder, the hole plate pressing strip is connected with the respective front connecting cylinder and the rear connecting cylinder through bolts, and the inner muffling hole plate is connected with the hole plate pressing strip through bolts after being pressed by the hole plate clamp.

4. The mining low-noise local fan capable of rapidly replacing the noise damping layer according to claim 1, wherein the inlet current stabilizer (3) comprises a front connecting cylinder body (3-1) of the inlet current stabilizer, a rear connecting cylinder body (3-2) of the inlet current stabilizer, a cylindrical inner core (3-3), an outer steel plate (3-7) of the inlet current stabilizer, a middle steel plate (3-8) of the inlet current stabilizer and an inner noise damping pore plate (3-9) of the inlet current stabilizer, the front connecting cylinder body (3-1) of the inlet current stabilizer is connected with the rear connecting cylinder body of the inlet noise damper, the rear connecting cylinder body (3-2) of the inlet current stabilizer is connected with the front connecting cylinder body of the primary host, the cylindrical inner core (3-3) is installed in the middle of the inlet current stabilizer (3), and two ends of the outer steel plate (3-7) and the middle steel plate (3-8) of the inlet current stabilizer are respectively connected with the two ends The front connecting cylinder (3-1) of the inlet current stabilizer and the rear connecting cylinder (3-2) of the inlet current stabilizer are fixedly connected, and the two ends of the inner layer silencing orifice plate (3-9) of the inlet current stabilizer are detachably connected with the front connecting cylinder (3-1) of the inlet current stabilizer and the rear connecting cylinder (3-2) of the inlet current stabilizer through detachable structures.

5. The mining low-noise local fan capable of rapidly replacing the sound-absorbing layer according to claim 1, characterized in that the sound-absorbing layer comprises two sound-absorbing plates and sound-absorbing cotton, and the sound-absorbing cotton is arranged between the two sound-absorbing plates.

6. The mining low-noise local ventilator capable of rapidly replacing the noise reduction layer according to claim 5, characterized in that the noise insulation plate is a rubber plate.

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