CN105008665A - Mining machine filtration unit with sound absorber - Google Patents

Abstract

A dust filtering unit mountable at a mining machine (100) having an exhaust unit (114) to drive an airflow stream through a filter duct (113). The filter unit also includes a silencer (206) positioned at an outlet region (508) of the exhaust unit (114) and configured to suppress noise emission from the exhaust unit. The silencer (206) comprises a plurality of internal directing vanes (913) configured to deflect the airflow stream at the exhaust of the filter unit away from a region immediately behind the mining machine.

Description

There is the mining device filter element of sound absorber

Technical field

The present invention relates to the filtering dust unit that can be arranged on mining device place, and particularly but non-exclusively relate to the mining device with exhaust unit and sound absorber, this exhaust unit drives the air stream being loaded with dust through filter element, this sound absorber is connected to exhaust unit, to weaken the sound emission from exhaust unit.

Background technology

Various diverse ways and machine are developed out, to be extracted in mineral and other valuable material at earth surface place and below.This machine operates at very large depth usually in hole, ore deposit.

In order to maximize cutting and mineral organic efficiency, mining device is developed out for specific purposes.Although some machine exclusively constructs in order to cut mineral from deposit or coal seam, other machine construction in order at subterranean depth place open tunnel, effectively to produce hole, ore deposit and to be provided for the path of mineral cutter.Particularly, movable mining device as provide at coal seam place the successful equipment that directly cuts and as prompt access Road Development device and occur.Usually, movable mining device comprise have setting on a rotating drum with the rotatable cutting head of the bit in contact mineral face or exploitation head.Cutting head is arranged on removable support arm place usually, to be in height adjustable relative to ground, hole, ore deposit.Rotate along with cutting head and proceed in coal seam, the mineral of extraction are aggregated and are carried backward via conveying equipment by active machine, to produce the stock pile of discharge, for extracting from hole, ore deposit subsequently.

As will be appreciated, along with bit engages mineral, such as coal, tiny airborne particulate pollutant produces, and it pollutes the environment around mining device, and then produces environment that is dangerous and that be harmful to exploitation personnel.Have developed diverse ways and equipment controls and particularly suppresses this dust.Especially successfully method relates to the filter unit that machine is installed, and its structure is in order to filter the air being loaded with dust immediately preceding cutting head rear.

There is the exemplary mining device of dust collection or filter element at US3,387,889; US3,712,678; US3,743,356; US5,597,393; Open in GB2263294 and EP1486642.

Filter element for the routine of mining device comprises the filter pipe with scrubber unit and demister.The exhaust unit comprising fan and sound absorber is connected to filter pipes and drives air stream through washer and demister, to attempt being separated particulate pollutant the air stream of emission purification that air carries secretly and to collect dust granule.Usually, sound absorber is arranged on the outlet end place of exhaust unit, to weaken the sound emission produced by other moving-member of fan and exhaust unit.Sound absorber generally includes and rolls cylindrical body, and sound attenuating or absorbing material serve as a contrast at cylinder wall place in inside.EP1503033 discloses the filter unit for mining device, and it has the fan unit being equipped with sound absorber, to attempt weakening noise emission.

But the shortcoming of filter element with the routine of the sound absorber that outlet end is installed is: noise emission is suppressed transverse to every side of mining device or weaken to a great extent, and experiences less noise decrease significantly immediately preceding the environment at machine rear.This principle is path and the speed that filtered air owing to carrying sound wave flows to this rear area.In limited tunnel during normal use machine, most of exploitation personnel are located in this rear environment.Therefore, a kind of filter unit of addressing these problems is needed and particularly sound absorber or noise reduction unit.

Summary of the invention

The object of this invention is to provide the filter element for mining device, this filter element structure in order to suppress the sound emission from the exhaust unit (air stream driver part) of filter element and make from the exhaust unit of filter element sound emission deflection away from immediately preceding mining device rear region and occupy the exploitation personnel in this region.

Be configured with sound absorber (being commonly referred to sound absorber) by making filter element and realize this object, this sound absorber is arranged on the air outflow port place of exhaust unit and is configured to upwards, downwards or laterally guided by the filtered air stream from exhaust unit in a certain direction and direct into the either side in the region immediately preceding filter element rear.Particularly, sound absorber of the present invention comprises and is internally arranged on the intrinsic multiple guide blades of sound absorber, and each blade comprises along the arc of its length or bending region, with at filter element rear deflection be responsible for the filtered air stream carrying sound wave.Sound absorber of the present invention is constructed adjustably to locate via the suitable attachment installed part at exhaust unit place, to realize the direction of the expectation of the discharged air circulation flow path deflected, to be applicable to specific mining environment, i.e. every side at this place of portion in its back-end up, down or transverse to mining device.

Deflecting blade of the present invention preferably includes sound absorption material, to reduce sound emission further.In addition, arc or bending region is directly positioned in air flow path, but also due to filtered air flow into be mapped to arc or the bending incident angle in region and the outlet end for suppressing sound wave to leave sound absorber.

In addition, sound absorber of the present invention is conducive to reducing noise emission further, because filtered air stream is separated by multiple blade.And when from regional observation immediately preceding sound absorber rear, the arc that the outlet end towards each blade is located or bending region effectively shields or closes the outlet end of sound absorber.That is, when observing from immediately rear, the area of the obvious minimizing of the internal part (fan blade) of exhaust unit is visible and is therefore minimized at the available surface area at the outlet end place of the sound absorber of the direct transmission of the sound wave for expedite or zero deflection.Also almost entirely from air exit end, visible existing muffler is formed and contrasts with wherein fan blade for this.

According to a first aspect of the invention, provide a kind of filtering dust unit, this filtering dust unit can be arranged on the mining device place with machine frame, this unit comprises: filter pipes, this filter pipes has at least one strainer filtering the airborne pollutant produced by machine, and filter pipes has reception containing the entrance of air stream of airborne pollutant and the outlet of the air stream of exhaust filtering; Exhaust unit, exhaust unit drives air stream through filter pipes, and exhaust unit is connected to the region of the outlet of filter pipes via exhaust unit entrance; Sound absorber, this sound absorber has the outlet being connected to the entrance of exhaust unit outlet and the air stream of exhaust filtering, and sound absorber structure is in order to weaken the sound emission from exhaust unit; It is characterized in that comprising: multiple air stream guide blades, described multiple air stream guide blades to be internally contained in sound absorber and to extend between sound absorber entrance and exit on longitudinally; Wherein each blade comprises along its length and the outlet towards sound absorber or the exit at the sound absorber arc of locating or bending region, and this arc or bending regional structure are in order to make the path of filtered air stream from sound absorber outlet deflection and away from the region immediately preceding filter element rear.

Preferably, arc or bending region extend on the lengthwise 1/3rd of total length exporting each nearest blade towards sound absorber or half.Preferably, leaf packet rubbing board columnar structure internally extending across sound absorber substantially or fully on the width vertical with the longitudinally of each blade.Alternatively, the curvature of arc area is in the scope of 30 ° to 60 °, and 40 °, in the scope of 50 °, or are more preferably 45 °.

Preferably, sound absorber comprises the cylinder columnar structure of hollow, and wherein by the internal chamber that limits of sound absorption wall, protective lining is at sound absorber pars intramuralis and locate around blade.Alternatively, protective lining is perforated.

Alternatively, blade comprises the plate surrounded by sound absorption material and the exocuticle surrounding sound absorption material.

Preferably, unit comprises 2 to 10,2 to 8,3 to 6 or 4 blades.

Preferably, blade is substantitally planar on the lengthwise the first half of the total length of each blade nearest towards sound absorber entrance.

Alternatively, blade is spaced apart from each other across sound absorber in inside, and wherein the direction between sound absorber entrance and exit, region is not between the blades hindered by arc or bending region.

Alternatively, sound absorber comprises the cylinder columnar structure limited by sound absorption wall, and wherein the diameter of sound absorber approximates the diameter of the fan unit of exhaust unit.

Preferably, filter element also comprises the noise damper of structure in order to weaken the sound emission from fan unit, and noise damper is axially positioned between fan unit and sound absorber.

According to a second aspect of the invention, provide a kind of mining device, comprising: main frame; Removable support arm, this removable support arm is attached to main frame pivotally and installs an end and cuts support arm; Filter support framework, this filter support framework is attached to main frame movably and constructs in order to support filtering dust unit, filtering dust unit comprises: filter pipes, this filter pipes has at least one strainer filtering the airborne pollutant produced by mining device, and filter pipes has reception containing the entrance of air stream of airborne pollutant and the outlet of the air stream of exhaust filtering; Exhaust unit, this exhaust unit drives air stream through filter pipes, and exhaust unit is connected to the region of the outlet of filter pipes; Sound absorber, this sound absorber has the outlet being connected to the entrance of exhaust unit outlet and the air stream of exhaust filtering, and sound absorber structure is in order to weaken the sound emission from exhaust unit; It is characterized in that comprising: multiple air stream guide blades, described multiple air stream guide blades to be internally contained in sound absorber and to extend between sound absorber entrance and exit on longitudinally; Wherein each blade comprises along its length and the outlet towards sound absorber or the exit at the sound absorber arc of locating or bending region, and this arc or bending regional structure are in order to make the path of filtered air stream from sound absorber outlet deflection and away from the region immediately preceding filter element rear.

Accompanying drawing explanation

By means of only example, the specific embodiment of the present invention will be described with reference to the drawings now, in the accompanying drawings:

Fig. 1 is the phantom drawing being configured to anchor driving machine (bolter miner) machine of bolt support (bolting) and material conveying while that mineral cutting according to the specific embodiment of the present invention, and it has the filter element being equipped with exhaust unit;

Fig. 2 is attached to the filter pipe of filter unit framework and the phantom drawing of exhaust unit according to the specific embodiment of the present invention;

Fig. 3 is the filter unit parts of Fig. 2 and the plan view of support frame;

Fig. 4 is the filter element of Fig. 3 and the side-sectional view of filter unit support frame;

Fig. 5 is the filter pipe of Fig. 1-4 and the side-sectional view of exhaust unit, wherein for diagram object removes sound absorber of the present invention;

Fig. 6 is the filter pipe of Fig. 5 and the plan view of exhaust unit;

Fig. 7 is the phantom drawing that the installation bracket of the exhaust unit for Fig. 6 comprising the second flex link is arranged;

Fig. 8 is the cross-sectional view of the installation bracket assembly by Fig. 7;

Fig. 9 illustrates the rear view of the sound absorber at the outlet end place for being positioned at exhaust unit, and according to the specific embodiment of the present invention, sound absorber has built-in multiple deflecting blade;

Figure 10 is the rear elevation of the sound absorber of Fig. 9;

Figure 11 is the cross-sectional view of the A-A by Figure 10;

Figure 12 is the side-sectional view of the sound absorber of Fig. 9 to Figure 11; And

Figure 13 is the cross-sectional view of the B-B by Figure 12.

Detailed description of the invention

Describe the filter element of the present invention be arranged on anchor driving machine by way of example referring now to preferred embodiment, this anchor driving machine is the continuous print mining device of electronic, the track installation being designed to simultaneously to dig road and installation pit top anchor pole.This mining device comprises a series of cutter cylinder, and described a series of cutter cylinder is arranged on the framework of hydraulic actuation, to enable cylinder relative to main frame and track self-movement.Therefore, filter element of the present invention is also arranged on machine place movably.Machine also comprises and can push up jumbolter (roof bolters) and lateral wall jumbolter (ribbolters) in the hole be installed on the stationary part of main frame of whole cutting cycle period operation.

With reference to figure 1, mining device 100 comprises main frame 101, main frame 101 provides support for underframe or chassis (not shown), underframe or chassis supports a pair driven track (not shown) for no reason, described a pair for no reason driven track be used for by machine 100 on the ground and advance along coal seam or cutting face.Main frame 101 comprises leading section 102 and substantially rearward end 103 substantially.Conveyer 104 extends to rearward end 103 from leading section 102 substantially and is suitable for carrying the material removed from cutting face, is deposited in remote location place for discharging subsequently and utilizing other conveying and mining equipment to store alternatively.Removable support arm 105 is pivotally mounted to main frame 101 an end and comprises the second end 106 installed and cut support arm 115, cuts support arm 115 and then installs multiple rotatable drum 107.Bit 108 is radially outstanding and be suitable for particularly being cut to and treat from the mineral material of seam mining and to remove mineral material from each cylinder 107.Support arm 105 and particularly end 106 can relative to main frame 101 and for no reason track (not shown) raise or reduce, coal bed can be cut within the scope of the change in elevation above the ground in hole, ore deposit to make machine 100.Support arm 105 by hydraulic cylinder (not shown) and other operation of components be associated, as the skilled person will appreciate.As directed, conveyer 104 extends to the discharge end portion of machine 101 from the region of cutting support arm 115, effectively cutting face is left in the conveying of the material of cutting.

In order to suppress the tiny dust granule polluting mining device 100 ambient air from the coal face infiltration that the shear action by bit 18 produces, machine 100 comprises the filtering dust unit for collecting this airborne pollutant.This filter element generally includes a series of pipeline, by being loaded with the air intake of pollutant in described a series of pipeline, to filter and to collect the dust granule carried secretly.Particularly, filter element comprises main filter pipes 113, and main filter pipes 113 comprises conventional filter element.According to specific embodiment, filter pipes 113 holds the scrubber unit (not shown) being positioned at the upstream of one or more demister unit, is also separated with the dust granule carried secretly by the air stream of atomization subsequently with the air stream of wetting pollution effectively.The air stream polluted initially is inhaled in filter unit via immediately preceding the admission line 112 of locating with cutting support arm 115 rear.Air stream through pipeline 112 and 113 is driven by the hydraulic pressure exhaust unit 114 of locating immediately preceding filter unit 113 downstream and at filter unit 113 rear.As shown in fig. 1, whole filter element 112,113,114 is supported by the filter unit framework 109 of the upper-side area being usually arranged on main frame 101 and mining device 100.Filter unit framework 109 so via machine activate bracket 110 install movably, this machine activates bracket 110 and comprises multiple pivotable section and actuating cylinder 116, described multiple pivotable section and actuating cylinder 116 make bracket 110, framework 109 and filter element 112,113,114 be raised in parallel with support arm 105 and to reduce, to guarantee that air intake pipe 112 is positioned at proper height place immediately preceding cutting support arm 115 rear.Support arm 115 comprises the top cover section 115 be usually positioned at above admission line 112.Top cover 111 comprises the structure of substantitally planar and is suitable for upwards raising vertically from framework 101 together with bracket 110, to contact top, hole, ore deposit, to be provided in the support structure of cutting and needing during the bolting operations of top, hole.

Referring to figs. 2 to 6, machine bracket 110 comprises a pair arm 202, filter pipes 113 and the exhaust unit 114 that the either side along filter support framework 109 extends.Each arm 202 is installed to framework 101 via hydraulic cylinder 116 at first end place.The second end of arm 202 is arranged on bracket top cover 111 place of locating above immediately air intake pipe 112.Pipeline 112 and particularly top cover section 111 be configured to via Pivot member 203 relative to filter pipes 113 and bracket arm 202 pivotable.Therefore, in Fig. 2 to 4, the pivotal area 203 of illustrated unit raises relative to main frame 101 via the actuating of cylinder 116 and reduces, this so that by filter element parts 112,113,114 raise and be reduced to different degree.

Filter pipes 113 is supported by filter frame 109 usually, and admission line 112 to be suspended on below top cover 111 and to be arranged on top cover 111 place towards machine leading section 102.Therefore filter pipes 113 is positioned in the middle of admission line 112 and exhaust unit 114 between the leading section 102 of machine 100 and rearward end 103 on longitudinally.Exhaust unit 114 is arranged on filter frame 109 place via one group of installation bracket 205 in extending-board form, and installation bracket 205 is bolted to the rearward end 204 of filter frame 109 and gives prominence to backward from the rearward end 204 of filter frame 109.Especially, exhaust unit 114 is suspended between elongate bracket 205 installation bracket 201 via another.With reference to figure 3 and Fig. 4, elongate bracket 205 is installed to elongate support arm 300 rigidly, and this elongate support arm 300 is given prominence to backward and is bolted to the rearward end 204 of framework 109 via erection bolt 401.

As shown in Figures 2 to 4, admission line 112 comprises entrance 200, immediately follows locates entrance 200 immediately preceding rotatable cutting roll 107 rear below the leading section of top cover 111.The air outflow port 400 of pipeline 112 connects communicatively with the air inflow aperture 301 of filter pipes 113, and the air inflow aperture 301 of this filter pipes 113 is positioned to large below pivotal area 203.Filter pipes 113 comprises air outflow port 302, and this air outflow port 302 is arranged to be communicated with the leading section fluid of exhaust unit 114.

With reference to figure 5 and 6, filter pipes 113 is by means of locating attachment 501 after one group of prelocalization attachment 500 of the every side horizontal expansion along pipeline 113 and one group and being arranged on framework 109 place.Exhaust unit 114 comprises the fan connector section 503 with general cylindrical structure.Section 503 is directly connected to hydraulic fan unit 504, and this hydraulic fan unit 504 also has the cylindrical structure of substantially hollow, and bolt is together rigidly for unit 503,504.The second end place backward and also comprising that sound absorber 505 (referred to here as sound absorber or noise damper) is positioned at fan unit 504 coaxially installs with unit 503 and 504, to provide the cylindrical structure of the cardinal principle hollow of rigid unitary structure.Whole gas deflation assembly 503,504,505 is arranged on air outflow port 302 place of filter pipes 113 via flex link 502.Connector 502 comprises the generic tubular pipe configuration with the axial length relatively short relative to unit 503,504,505.Connector 502 by flexibly deformable material and particularly rubber is formed.A pair annular mounting edge along 506 from each axial end portion of flex link 502 radially outwardly and be arranged on each axial end portion of flex link 502, thinks that adjacent upstream filter unit 113 and downstream fan connector section 503 provide installation region.Therefore, exhaust unit 114 via in the middle of axially and flexibly deformable resilient coupling 502 and be attached to filter pipes 113 non-rigidly.

With reference to figure 7 and 8, exhaust unit 114 hangs from filter frame 109 by means of described a pair first installation brackets 201 and second pair of installation bracket 205 usually.Another flex link 703 is positioned in the middle of bracket 201 and 205, to hang exhaust unit 114 with " floating " structure relative to support frame 109.Second bracket 205 comprises a pair extending-board 700, and described a pair extending-board 700 is parallel to and extends each other and the spaced apart spacing corresponding with the spacing more smaller than the diameter of cylindrical air exhaust unit 114.A pair attachment plate 701 laterally extends from the outward flange of plate 700 and is orientated to and be inclined upwardly from the plane surface facing upwards of each plate 700.Each installing plate 701 comprises multiple hole 703, to receive suitable attachment bolt, to be arranged on each rearwardly projecting frame arm 300 place, but is bolted to the end 204 of filter frame 109 rigidly.That first bracket 201 comprises a pair substantitally planar and the plate 702 of rectangle, each plate plate 700 front area vertical above location.Each first carrier frame plate 702 is arranged on above each second carrier frame plate 700 via three deformable connectors 703, and described three deformable connectors 703 are formed by the elastic deformable material being rubber.Especially, three flexible and linings 703 of general cylindrical are clipped in the middle of bracket 702 and 700.Therefore, the first carrier frame plate 702 flexibly and be flexibly arranged on the second carrier frame plate 700 place.The inward flange 707 of plate 702 relative to the longitudinal axis of exhaust unit 114 in the corresponding inward flange 708 of plate 700 radially.Therefore, exhaust unit 114 is contained in region 709, panel edges 707 is positioned to the exterior surface of cylindrical fan unit 504 and is welded to the external surface of cylindrical fan unit 504 rigidly.Other region of exhaust unit 114 is not arranged by the installation bracket of Fig. 7 with Fig. 8 and is contacted.Construct and to extend between plate 700 that the sound reduction material 704 in order to reduce from the audio emission of fan unit 504 extends at lengthwise and connect the plate 700 of lengthwise extension and follow the partial cylindrical shapes path of general curved, so as immediately preceding second region of exhaust unit 114 below be located.The leading section of sound attenuating material 704 and rearward end, to be attached to the arch rigid lid 705 at each lengthwise edge of each plate 700 rigidly for border, make the columniform half cylinder columnar structure of plate 700, material 704 and lid 705 qualifying part.

Therefore, exhaust unit 114 is attached to filter pipes 113 non-rigidly in the axial direction via flex link 502 and also on horizontal lateral, is arranged on filter frame 109 place non-rigidly via one group of second flex link 703.The less desirable transmission of the body vibration produced by fan unit 504 is increased in the noise emission during the operation of exhaust unit 114 significantly.In structure of the present invention, filter element and mining device 100 are configured by be eliminated or suppresses the transmission from the vibration force of fan unit 504 and reduce noise emission, otherwise, the vibration force from fan unit 504 will propagate into filter unit 113 and filter frame 109.Therefore, the present invention is configured by the noise emission that fan unit 504 reduces from fan unit 504 relative to the installation of the nonrigid of filter pipes 113 and machine frame 100 (and particularly filter frame 109) and isolation.That is, the first connector 502 of axial location can radially and axially elastic deflection, to absorb any vibration force from fan unit 504.In addition, a series of second flex link 703 allows be attached to nonrigid between the installation bracket 201 of fan unit 504 and the bracket 205 being attached to filter frame 109 rigidly rigidly and flexible flexure.

Referring to figs. 2 to Fig. 4, exhaust unit 114 also comprises another sound absorber (sound absorber) 206 of the exhaust end being arranged on sound absorber 205.With reference to figure 5 and Fig. 6, fan unit 504 comprises air inflow aperture end 507 and air outflow port end 508, the air stream of purification received from filter pipes 113 is received air inflow aperture end 507, discharge and filtered air stream flow from air outflow port end 508.Sound absorber 505 comprises air inflow aperture 509 (being connected to the outlet 508 of fan unit 506 rigidly) and outlet 510.Another sound absorber 206 of exhaust unit 114 is arranged on and is directly attached to outlet 510 place of the middle sound absorber 505 of fan unit 504.According to detailed description of the invention, exhaust unit 114 comprises two mufflers 505 and 206 being positioned at fan unit 504 (with fan connector 503) downstream.But according to other detailed description of the invention, sound absorber 206 can directly be connected to fan unit 504 via outlet 508.

With reference to figure 9 to Figure 13, sound absorber 206 comprises the cardinal principle cylinder columnar structure with annular wall 910, and this annular wall limits internal chamber 908.Wall 901 comprises the first annular end 906 and the second cardinal principle annular end 905, and this first annular end 906 limits the air inflow aperture entered in chamber 908; This second cardinal principle annular end 905 limits the air outflow port leaving internal chamber 908.Multiple mounting flange 902 from first end 906 relative to extending through the longitudinal axis 1200 of sound absorber 206 radially.Two flanges 902 installation bracket 904 then, this bracket 904 has the aperture 903 for sound absorber 206 being attached to rigidly central silencer 505.Another flange 902 is provided for the installation portion of four brackets 904, and these four each brackets of bracket 904 have corresponding installation aperture 903.Therefore, sound absorber 206 can rotate around axis 1200 and be arranged on the multiple different installed position around axis 1200.

Four air stream guide blades 913 spans internal chamber 908 on the direction perpendicular to axis 1200 laterally extends.Each blade 903 is spaced apart from each other with uniform spacing, to represent the obstruction from entrance 906 to the air flow path of outlet 905.Interior lining 910 circumferentially surrounding wall 901 in chamber 208 internally and extend around guide blades 913.Lining 910 comprises the perforation 915 by the keyhole formation distributed equably on the whole surface of lining 910.Lining 910 avoids moisture in the environment around sound absorber 206 and dust for the protection of guide blades 913.

Each guide blades 913 comprises the structure of general plate, this general plate be configured in entrance 906 and outlet 905 between on longitudinally each blade 913 only about half of on be substantitally planar.That is, each blade 913 comprises the first end 911 being positioned at entrance 906 place substantially and the second end 912 being positioned at outlet 905 place substantially.Each blade 913 comprises the inner frame formed by the steel plate 1100 for rectangular shape.Each plate 1100 is encased by sound absorption material 1101, and this sound absorption material 1101 is formed to provide the material of sound absorption characteristics in order to the transmission absorbing sound wave or weaken sound wave by structure.According to detailed description of the invention, material 1101 comprises the Rockwool for fibrous material ^tM(can obtain from Britain Rockwool Ltd).Exocuticle 1102 surrounds sound absorption material 1101, makes each blade 913 comprise composite construction, and this composite construction structure also reduces in order to the air being directed to flow past internal chamber 908 noise emission produced by fan unit 504.Utilize the suitable attaching unit being fixed to lining 910 and/or sound absorption wall 901 that each guide blades 913 is fixed to inside liner 910 in the direction of the width at each widthwise edges 916 place.According to detailed description of the invention, each blade 913 is substantitally planars perpendicular to axis 1200 in the direction of the width between edge 916.

Each blade 913 is included in the bending area 907 formed on the second end 912 and nearest its afterbody lengthwise half portion of outlet 905.According to detailed description of the invention, the end regions 907 of each blade 913 comprises the curvature relative to longitudinal axis 1200 about 45 °.That is, section 907 representative is tangential to the deflector or air stream leader that axis 1200 extends, to represent the region air stream flowing to outlet 905 from entrance 906 in chamber 908 being had to larger obstruction.Blade 913 is separated from each other at a certain distance, makes the face 1103 of the first blade separate predetermined distance with the crooked end 1104 (on the direction perpendicular to axis 1200) of adjacent blade 913.Therefore, narrower elongated slot is defined between adjacent blade 913, the without hindrance volume of its representative at internal chamber 908 place, passes the direct transmission of sound absorber 906 from fan unit 904 for the air stream when observing exhaust unit 114 from the immediate rear of outlet end 905.

Sound absorber 206 comprises the incision tract 914 of arc, and the incision tract of this arc to be formed in cylindrical wall 901 and axially inwardly to stop through wall along 905 from Exit-edge on the direction towards inlet edge 906.This region 914, for increasing the surface area of air exit 905, hinders and the available cross-sectional area of therefore minimizing outlet 905 to compensate.By locating this region 914 at cylinder wall place, the air stream left deflects with the lateral angles relative to axis 1200 further.

In use, the discharged air stream from fan unit 504 is guided through internal chamber 908, to cross blade 913.Because blade 913 is substantitally planar extend from first end 911 the first half, so air flow path is only slightly by minimum the obstructions impact represented by each tabular body 913 (in this first half region).But along with air stream is incident on the end regions 907 of each blade 913, flow path is deflected away from axis 1200 and leaves outlet 905 to be similar to corresponding angle with the curvature angles of each curved section 907.By adjustably fixing a silencer 206 via bracket 904, the air stream discharged from sound absorber 206 is by the either side in region upwards, downwards or be laterally directed to immediately preceding rear, machine end 103.This is conducive to the noise emission obviously reduced near this, to protect exploitation personnel.

Claims (14)

1. a filtering dust unit, described filtering dust unit can be arranged on the mining device place with machine frame, and described unit comprises:

Filter pipes (113), described filter pipes has at least one strainer filtering the airborne pollutant produced by described machine, and described filter pipes (113) has reception containing the entrance (301) of air stream of described airborne pollutant and the outlet (302) of the air stream of exhaust filtering;

Exhaust unit (114), described exhaust unit drives described air stream through described filter pipes (113), and described exhaust unit (114) is coupled to the region of the described outlet (302) of described filter pipes (113) via exhaust unit entrance (507);

Sound absorber (206), described sound absorber has the outlet (905) of entrance (906) and the described filtered air stream of discharge being coupled to exhaust unit outlet (508), and described sound absorber (206) is constructed to weaken the sound emission from described exhaust unit (114);

It is characterized in that comprising:

Multiple air stream guide blades (913), described multiple air stream guide blades to be internally contained in described sound absorber (206) and extension between described sound absorber entrance (908) and outlet (905) on longitudinally;

Wherein each blade (913) comprises along its length and the outlet (905) towards described sound absorber (206) or outlet (905) place in described sound absorber (206) arc of locating or bending region (907), and described arc or bending region (907) is constructed to make the path of described filtered air stream export (905) from described sound absorber to deflect and away from the region immediately preceding described filter element rear.

2. unit according to claim 1, wherein said arc or bending region (907) extends on the lengthwise 1/3rd or half of the total length of each blade (913) nearest towards described sound absorber outlet (905).

3. unit according to claim 1 and 2, wherein said blade (913) comprises platy structure and internally extends across described sound absorber (206) substantially or fully on the width vertical with the described longitudinally of each blade (913).

4. the unit according to any one in aforementioned claim; wherein said sound absorber (206) comprises the cylinder columnar structure of hollow; wherein by sound absorption wall (901) limits internal chamber (908), protective lining (910) be positioned at described sound absorption wall (901) inside and around described blade (903).

5. unit according to claim 4, wherein said protective lining (910) is perforated.

6. the unit according to any one in aforementioned claim, the curvature in the region (907) of wherein said arc is in the scope of 30 ° to 60 °.

7. unit according to claim 6, the curvature in the region (907) of wherein said arc is in the scope of 40 ° to 50 °.

8. the unit according to any one in aforementioned claim, wherein said blade (913) comprises the plate (1100) surrounded by sound absorption material (1101) and the exocuticle (1102) surrounding described sound absorption material (1101).

9. the unit according to any one in aforementioned claim, comprises three to six blades (913).

10. the unit according to any one in aforementioned claim, wherein said blade (913) is substantitally planar on the lengthwise the first half of the total length of each blade nearest towards described sound absorber entrance (906).

11. unit according to any one in aforementioned claim, wherein said blade (913) is spaced apart from each other across described sound absorber (206) in inside, and the direction of the region wherein between described blade between described sound absorber entrance (906) and outlet (905) is not hindered by described arc or bending region (907).

12. unit according to any one in aforementioned claim, wherein said sound absorber (206) comprises the cylinder columnar structure limited by sound absorption wall (901), and the diameter of wherein said sound absorber (206) approximates the diameter of the fan unit (504) of described exhaust unit.

13. unit according to claim 12, also comprise noise damper (505), described noise damper (505) is constructed to weaken the sound emission from described fan unit (504), and described noise damper (505) is positioned axially between described fan unit (504) and described sound absorber (206).

14. 1 kinds of mining devices (100), comprising:

Main frame (101);

Removable support arm (105), described removable support arm (105) is attached to described main frame (101) pivotally and installs at end (106) place cuts support arm (115);

Filter support framework (109), described filter support framework (109) is attached to described main frame (101) movably and is constructed to support filtering dust unit, and described filtering dust unit comprises:

Filter pipes (113), described filter pipes (113) has at least one strainer filtering the airborne pollutant produced by described mining device, and described filter pipes has reception containing the entrance (301) of air stream of described airborne pollutant and the outlet (302) of the air stream of exhaust filtering;

Exhaust unit (114), described exhaust unit (114) drives described air stream through described filter pipes (113), and described exhaust unit (114) is coupled to the region of described filter pipes outlet (302);

Sound absorber (206), described sound absorber (206) has the outlet (905) of entrance (906) and the described filtered air stream of discharge being coupled to exhaust unit outlet (508), and described sound absorber (206) is constructed to weaken the sound emission from described exhaust unit (114);

It is characterized in that comprising:

Multiple air stream guide blades (913), described multiple air stream guide blades (913) to be internally contained in described sound absorber (206) and extension between described sound absorber entrance (906) and outlet (905) on longitudinally;

Wherein each blade (913) comprises along its length and the outlet (905) towards described sound absorber (206) or outlet (905) place in described sound absorber (206) arc of locating or bending region (907), and described arc or bending region (907) is constructed to make the path of described filtered air stream export (905) from described sound absorber to deflect and away from the region immediately preceding described filter element rear.