CN102359352A - Porthole dust catcher - Google Patents
Porthole dust catcher Download PDFInfo
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- CN102359352A CN102359352A CN2011102161752A CN201110216175A CN102359352A CN 102359352 A CN102359352 A CN 102359352A CN 2011102161752 A CN2011102161752 A CN 2011102161752A CN 201110216175 A CN201110216175 A CN 201110216175A CN 102359352 A CN102359352 A CN 102359352A
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Abstract
The invention relates to a porthole dust catcher which comprises a dust collector, wherein a drill rod inlet and a drill rod outlet through which a drill rod passes are correspondingly arranged at the front side and the rear side of the dust collector, a discharge port is arranged at the lower side of the dust collector, a first air seal device is arranged at the drill rod inlet and defines a first air seal port through which the drill rod passes, the first air seal device is provided with first air injection holes used for blowing dust floating to the drill rod inlet from the dust collector back to the dust collector, the first air injection holes are arranged in the circumferential direction of the first air seal device and are provided with respective air inlet ends for connecting with an air source and corresponding air outlet ends, the central line of each first air injection hole is close to the central line of the first air seal port gradually in the direction from the respective air inlet end to the respective air outlet end. The porthole dust catcher is applicable to a drill rod with a triangular section, and the problem that the drill rod inlet of the traditional dust extractor is hard to seal is solved.
Description
Technical field
The present invention relates to the coal mining field, especially a kind of aperture grit arrestor that is used for coal mine down-hole drilling.
Background technology
When in the coal seam, holing; Can produce a lot of dust at the hell downwind side when using wind power slag-discharging, during especially soft, that pulverized coal particle is very thin coal bed drilling operation, can produce amounts of dust in the coal seam; Be full of the entire job scene, even in the whole tunnel that can permeate.Not only threaten and influence the workman of field operation, other workmans to operation in same tunnel also cause very big influence simultaneously.
In order to address the above problem; Application number is that 2010106016013.3 Chinese patent discloses a kind of colliery with intensive shallow bore hole grit arrestor; Said colliery comprises disposal box with intensive shallow bore hole grit arrestor, and both sides are provided with corresponding drilling rod import and drilling rod outlet before and after the said disposal box, and both sides are provided with dedusting mouth and slag-drip opening up and down; Said drilling rod exit is provided with sleeve, and said dedusting mouth place is provided with spray nozzle.When said grit arrestor is worked; The front end of sleeve, promptly the end away from said disposal box embeds rib, and drilling rod is successively through beginning to creep into rib after said drilling rod import and the drilling rod outlet; Thereby the dust that produces in the drilling process is imported in the disposal box through said sleeve; Then dust is sprayed, finally discharge, to reach the depositing dust purpose through said slag-drip opening through said spray nozzle.
Certain depositing dust effect has in use been played with intensive shallow bore hole grit arrestor in above-mentioned colliery; But still there are some problems: 1) because the drilling rod afterbody that use in the colliery mostly is triangle; Therefore conventional hermetically-sealed construction can't be set in the drilling rod import department of said disposal box; And the spray effect of described spray nozzle is limited; Therefore can't the dust that produce in the drilling process fully be drenched, in the process of rod boring, still having the part dust " to escape from " described disposal box through said drilling rod import department influences surrounding environment, promptly can't realize the sealing with the drilling rod cooperation place; 2) said slag-drip opening place does not have the dust-break device, and the slag-drip opening place often becomes the outlet that dust is blown out; What 3) said disposal box adopted is overall structure; And drilling rod is generally longer; And in use need often to change, each disposal box that then must will be sheathed on the drilling rod of changing falls along drilling rod axial " taking off ", has also increased its labour intensity when having reduced staff's operating efficiency; 4) owing to be to adopt said spray nozzle depositing dust, the depositing dust medium is a water, and the foreign material such as dregs that therefore produce in after treatment dust (main component is a coal) and the drilling process are mingled in one and can't realize recycling; In addition, down-hole water intaking also comparatively difficulty and water after pollution caused by coal dust, can't realize recycle, this also makes above-mentioned colliery more inconvenient with the use of intensive shallow bore hole grit arrestor.
Summary of the invention
The object of the present invention is to provide a kind of aperture grit arrestor that adopts hermetic seal, the problem that is difficult to seal with the drilling rod import department that solves existing grit arrestor.
In order to address the above problem; Aperture of the present invention grit arrestor adopts following technical scheme: the aperture grit arrestor; Comprise disposal box; The forward and backward both sides correspondence of said disposal box is provided with drilling rod import, the drilling rod outlet that supplies drilling rod to pass, and its downside is provided with slag-drip opening, and said drilling rod import department is equipped with first air seal set; Said first air seal set surrounds the first sealing gland mouth that a confession drilling rod passes; First air seal set has and is used for blowing back first fumarole in the disposal box with wafing in the said disposal box to the dust of drilling rod import department, the week that said each first fumarole is located in the said first sealing gland mouth upwards and have separately and be used for and inlet end that source of the gas connects and corresponding jet end, the center line of each first fumarole all from its inlet end separately extremely jet end draw close gradually to the center line of the said first sealing gland mouth.
The jet end of said each first fumarole all has a straight hole section, the center line of the straight hole section of each first fumarole all from front end to the rear end of said disposal box along the circumferencial direction conjugate deviation of the said first sealing gland mouth.
Described first air seal set comprises first tracheae; Said first tracheae surrounds the passage that supplies drilling rod to pass in said drilling rod import department; First air inlet that first tracheae has first gas channel and is used for said first gas channel is connected with source of the gas; Said each first fumarole is arranged at first tracheae on a side of said drilling rod outlet, and the inlet end of said each first fumarole is through said first gas channel and the first air inlet conducting.
Said first tracheae has first inclined-plane of taper towards a side of the drilling rod outlet of said disposal box; Gradually away from the center line of the said first sealing gland mouth, said first fumarole is arranged on said first inclined-plane from front end to the rear end of said disposal box on said first inclined-plane.
Said air seal set comprises that also sealing is assemblied in the sheath in the said drilling rod import, and said sheath is the tubular of both ends open, and said first tracheae is integrally formed on the inwall of said sheath.
Coaxial line is equipped with fire-retardant cover in the said sheath, and said fire-retardant putting has the fire-retardant passage that supplies drilling rod to pass, the internal diameter of the ring that the internal diameter of said fire-retardant passage surrounds less than said tracheae.
One side of the drilling rod outlet in said first tracheae towards said disposal box in the said sheath is provided with and is used to prevent the air-flow that in said first fumarole, sprays first air baffle ring along the adherent walking of internal face of sheath; Have the resistance dirt passage that supplies drilling rod to pass on said first air baffle ring, said resistance dirt passage and center line and the central lines of the said first sealing gland mouth.
Said disposal box comprises the upper case half and the bottom half of mutual fastening, surrounds said drilling rod import and export after said upper and lower half chests body fastens.
Described sheath comprises first cover and second cover of mutual fastening; The said upper and lower correspondence of partly overlapping is fixed on the said upper and lower half chests body; First puts and is fixed with upper tube half and first plate; Second puts and is fixed with lower tube half and second plate, and said upper and lower semicanal is spliced to form described first tracheae, and said upper and lower half plate is spliced to form said first air baffle ring.
Said slag-drip opening place is equipped with second air seal set; Said second air seal set comprises second tracheae; Said second tracheae is located in making progress in week of slag-drip opening and surrounds the slag passage that falls that a coal supply slag drops; Have second gas channel in second tracheae, have second air inlet that is used for being connected with source of the gas on its tube wall and be used for dust is upwards blown afloat second fumarole, said second fumarole is arranged at the upside of second tracheae and through said second gas channel and the said second air inlet conducting.
The upside of said second tracheae has second inclined-plane of taper, and said second inclined-plane is from bottom to up gradually away from the center line of said slag-drip opening, and said second fumarole is arranged on the described tapered slope.
Be provided with second air baffle ring that is used to prevent from the air-flow of said second fumarole ejection along the adherent walking of internal face of disposal box in the said disposal box in the top of said second tracheae.
The upside of said disposal box has and is used for the dust mouth that is connected with dust collecting.
Because aperture of the present invention grit arrestor is equipped with said first air seal set in the drilling rod import department sealing of said disposal box; Said first air seal set surrounds the first sealing gland mouth that a confession drilling rod passes; First air seal set has and is used for blowing back first fumarole in the disposal box with wafing in the said disposal box to the dust of drilling rod import department; Corresponding drilling rod is passed, in the common passage that forms of said air seal set and drilling rod import in the process of rod boring, when the dust of generation wafts to said drilling rod import department; Can it be blown through the air-flow of said first fumarole ejection and be back to disposal box; Prevent dust from the drilling rod import department of disposal box to external diffusion owing to be to lean on air seal, therefore first air seal set does not need to contact with drilling rod; Applicable to the cross section is leg-of-mutton drilling rod, has solved the problem that the drilling rod import department of existing grit arrestor is difficult to seal.
Description of drawings
Fig. 1 is the structural representation of the embodiment 1 of aperture of the present invention grit arrestor;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the structural representation of first air seal set among Fig. 2;
Fig. 4 is the stereogram of the embodiment 1 of aperture of the present invention grit arrestor.
The specific embodiment
The embodiment 1 of aperture of the present invention grit arrestor shown in Fig. 1-4, has disposal box 1, and the forward and backward side of disposal box 1 is provided with corresponding drilling rod import, drilling rod outlet, and its upper and lower side correspondence is provided with dust mouth, slag-drip opening; The drilling rod import is used to supply corresponding drilling rod to penetrate disposal box 1; The drilling rod outlet is used to supply drilling rod to pass disposal box 1; In addition, when work, can connect corresponding sleeve in the drilling rod exit; And sleeve is plugged on the rib; Thereby the dust that produces in the rod boring process is caused in the disposal box 1 dust mouth is used for connecting through dust outlet tube road 4 and corresponding dust treatment plant (like filter bag, dedusting tank or dirt, gas, separator), thus with dust (main component is a coal) centralized collection so that later use or focus on and the Device in Gas of following is collected (when adopting dirt, gas, separator); Disposal box 1 adopts split-type structural, and specifically, promptly disposal box 1 comprises the upper case half 1-1 and the bottom half 1-2 of mutual fastening; The dust mouth is arranged on the upper case half 1-1; Slag-drip opening is arranged on the bottom half 1-2, and the relative heavier dregs that are used for supplying boring procedure to produce drop out, in use; Can be through corresponding gathering-device (like collecting box or collecting bag) be set at said slag-drip opening place, thus the dregs that produce in the boring procedure are carried out centralized collection so that do subsequent treatment; The drilling rod import and export surrounds after fastening mutually by upper and lower half chests body; Be hinged with on the front end of bottom half 1-2 can on the check lock lever 5 that turns over; Check lock lever 5 is bolted with lock handle 6 away from an end of its hinged end; Has corresponding clip slot 7 on the corresponding end of upper case half 1-1; Turn on the check lock lever 5 that the back embeds in the corresponding clip slot and cooperates with the upper end block of clip slot and with upper and lower half chests body locking, the rear end of upper case half and bottom half is provided with the pin-and-hole of correspondence respectively through the fixed block 30 of correspondence through corresponding lock handle, cooperation is located through the alignment pin 31 that is plugged in the respective pin hole in the rear end of upper and lower half chests body.
The drilling rod import department sealing of disposal box 1 is equipped with first air seal set 8; First air seal set 8 has the sheath 9 that is sealed and matched with disposal box 1; Sheath 9 be both ends open tubular and with the concentricity line setting of drilling rod import, the internal face of sheath is provided with first tracheae, 10, the first tracheaes 10 and surrounds an annular; The first sealing gland mouth that the annular distance formation one of the annular that it surrounds is connected with drilling rod import conducting; First tracheae 10 forms the passage that the corresponding drilling rod of a confession passes jointly with the drilling rod import, and first tracheae 10 is integrally formed on the internal face of sheath 9, and the correspondence position of sheath 9 internal faces forms the outside wall surface of first tracheae 10; The cross section vertical with its center line of first tracheae 10 is quadrangle; Its inner tube chamber forms first gas channel, has first air inlet that is used for being connected with source of the gas on the tube wall of first tracheae 10, and first air inlet is used for first gas channel in first tracheae 10 is connected with corresponding source of the gas; First tracheae 10 circumferentially be laid with first fumarole 14 towards tube wall upper edge first tracheae 10 of a side of the drilling rod of disposal box 1 outlet; The periphery that first fumarole 14 is located in the first sealing gland mouth upwards, it has and is used for and inlet end that source of the gas connects and corresponding jet end, the inlet end of first fumarole passes through first endotracheal first gas channel and the said first air inlet conducting; First fumarole is used for blowing back in the disposal box 1 wafing in the disposal box to the dust of drilling rod import department; Preventing it discharges from drilling rod import department; The tube wall towards a side of the drilling rod of disposal box outlet of first tracheae 10 be one from front side to the rear side of disposal box 1 gradually away from first inclined-plane of the taper of the center line of said sealing gland passage; First fumarole 14 is laid on described first inclined-plane; Made things convenient for processing so widely to first fumarole 14; Reduce its difficulty of processing and cost; The center line of each first fumarole 14 is drawn close to the center line of the said first sealing gland mouth to rear side (towards a side of said first fumarole) from the front side (side of said dorsad drilling rod outlet) of first tracheae gradually, and the angle that the center line of first fumarole is drawn close to the center line of the first sealing gland mouth between the center line of the back and the first sealing gland mouth is advisable with the 20-45 degree; The jet end of each first fumarole 14 all has a straight hole section; The circumferencial direction conjugate deviation of the ring that this straight hole Duan Jun edge first tracheae 10 surrounds; Angle excursion is advisable with the 20-45 degree; Be for the tight described sealing gland passage of air bell that makes from said first fumarole 14 ejection like this and form spiral air flow, thereby prevent that better dust from " escaping " to go out from drilling rod import department; Locate to be provided with first air baffle ring 11 in the rear side (a side) of first tracheae 10 in the sheath 9 with first venthole; Blow back break-in to first air baffle ring 11 from the air-flow that blows out in first fumarole 14; Thereby avoided air-flow along the adherent walking of the internal face of sheath 9, improved its hermetic seal (negative-pressure sealing) performance; Also be equipped with fire-retardant cover 12 in the sheath 9; Fire-retardant cover 12 adopts copper material; It has the fire-retardant passage that a confession drilling rod passes; The internal diameter of the endoporus (being said sealing gland mouth) of the annular that the internal diameter of fire-retardant passage is surrounded less than first tracheae can avoid first tracheae 10 to contact with drilling rod like this, plays the effect of protection first tracheae 10; Fire-retardant cover 12 is divided into two sections in the both sides, front and back of first tracheae 10, and two sections of fire-retardant cover 12 two pressure rings 13 that are connected in the sheath two ends through flange are respectively pressed to establish and are fixed in the sheath 9, certainly, all have the passage that supplies drilling rod to pass on two pressure rings 13; First air seal set adopts split-type structural equally; Specifically; Be first cover and second cover that sheath 9 comprises mutual fastening, described first puts and is fixed with upper tube half and first plate, and described second puts and be fixed with lower tube half and second plate; Said upper and lower semicanal is spliced to form described first tracheae 10; Said upper and lower half plate is spliced to form said first air baffle ring 11, and said fire-retardant cover 12 and pressure ring 13 all adopt and be divided into the upper and lower two halves formula structure that partly puts simultaneously, and the described disposal box 1 and first air seal set all adopt the split-type structural of mutual fastening; Therefore can the radially both sides of upper and lower half chests body from drilling rod be fastened fast through check lock lever 5, lock handle 6 and the clip slot 7 that correspondence is divided on the upper and lower half chests body in use; The assembling of said first air seal set is shaped, and do not need again with the control of dust housing-case along drilling rod axially put drilling rod, made things convenient for the replacing of drilling rod greatly.
The slag-drip opening place of disposal box 1 is provided with second air seal set; Second air seal set comprises second tracheae 16; Second tracheae 16 is used to prevent that dust from dropping out from slag-drip opening; Second tracheae 16 surrounds an annular; Its hole that surrounds forms the slag passage that falls that a coal supply slag drops; Also having second air inlet, 17, the second air inlets, 17 places that are used for connecting with corresponding source of the gas on the tube wall of second tracheae 16 is provided with and is used to regulate the tap changer 18 of air-flow size and through the tracheae 19 and the first air inlet conducting, has second gas channel in second tracheae 16; The upside of second tracheae 16 (towards a side of the dust mouth of disposal box) is provided with second inclined-plane of corresponding taper and the circumferencial direction of the ring that second tracheae 16 surrounds in upper edge, said second inclined-plane is laid with second fumarole 20; Upwards it had and was used for and inlet end and corresponding jet end that source of the gas connects the week that second fumarole 20 is located in the said slag passage that falls, and respectively the inlet end of second fumarole is through the second air inlet conducting of said second gas channel and second tracheae; Wherein second inclined-plane is the processing of second fumarole 20 for ease; Second fumarole 20 center line from the lower end (end of the dust mouth of disposal box dorsad) to the upper end gradually near the center line of the said slag passage that falls, the center line of each second fumarole near the center line of the said slag passage that falls after with the center line of the slag passage that falls between the angle that forms be advisable with the 20-45 degree, the jet end of second fumarole all have a straight hole section and each second fumarole the circumferencial direction conjugate deviation of the annular that surrounds of center line edge second tracheae 16; Angle excursion is advisable with the 20-45 degree; So also be to be covered with the slag-drip opening of disposal box and to form spiral air flow, thereby form reliable hermetic seal, prevent that dust from dropping out from the slag-drip opening of disposal box 1 in order to make from the air-flow of filtering ejection in second fumarole 20; The top of second tracheae is provided with second air baffle ring, 21, the second air baffle rings 21 and is used for making from the air-flow break-in of said second fumarole 20 interior ejections with filter dirt pipe jointing, prevents the adherent walking of its internal face along disposal box.
Said aperture grit arrestor in use can be with the upper and lower half chests body of the disposal box radially fastening from drilling rod; Turn over then said check lock lever make its embed behind corresponding clip slot the described lock handle of turn make it with the corresponding end jam-packed of clip slot can be with upper and lower half chests body quick lock in; Thereby drilling rod is contained; Sleeve through correspondence is sealed and matched the drilling rod outlet of disposal box with rib, thereby the dust that drilling rod is produced in the process of creeping into gets into disposal box, gets into the dust of disposal box because the effect of said first air seal set and second air seal set can't be from the drilling rod import and slag-drip opening discharge of disposal box; Therefore can only discharge disposal box from said dust mouth; Therefore only need to enter corresponding dust collecting so that follow-up use when needing to change drilling rod, only need be unclamped said lock handle through said dust outlet tube road; Under turn over said check lock lever can realize for convenience detach, easy accessibility.
Because aperture of the present invention grit arrestor is equipped with said first air seal set in the drilling rod import department sealing of said disposal box; Said first air seal set surrounds the first sealing gland mouth that a confession drilling rod passes; First air seal set has and is used for blowing back first fumarole in the disposal box with wafing in the said disposal box to the dust of drilling rod import department; Corresponding drilling rod is passed, in the common passage that forms of said air seal set and drilling rod import in the process of rod boring, when the dust of generation wafts to said drilling rod import department; Can it be blown through the air-flow of said first fumarole ejection and be back to disposal box; Prevent dust from the drilling rod import department of disposal box to external diffusion owing to be to lean on air seal, therefore first air seal set does not need to contact with drilling rod; Applicable to the cross section is the drilling rod of Any shape (like triangle or circle), has solved the problem that the drilling rod import department of existing grit arrestor is difficult to seal.
In the foregoing description, described first air seal set can also adopt the one group of shower nozzle that is laid in said drilling rod import department; Described second air seal set can also omit; The ring that said first tracheae surrounds can also be Fang Huan; The described disposal box and first air seal set can also adopt monolithic construction separately; Described check lock lever, clip slot and corresponding lock handle can also adopt screw rod or hook, certainly, corresponding screw rod bearing structure (like screwed hole, swivel nut) must be set on upper and lower half chests body in such cases or link up with bearing structure (like otic placode); The sheath of said first air seal set, first air baffle ring and fire-retardant cover all can omit; Existing dedusting mouth also can be adopted in described dust mouth, and promptly the upside at disposal box is provided with spray nozzle to reach the depositing dust purpose.
Claims (13)
1. aperture grit arrestor; Comprise disposal box; The forward and backward both sides correspondence of said disposal box is provided with drilling rod import, the drilling rod outlet that supplies drilling rod to pass; Its downside is provided with slag-drip opening; It is characterized in that: said drilling rod import department is equipped with first air seal set, and said first air seal set surrounds the first sealing gland mouth that a confession drilling rod passes, and first air seal set has and is used for blowing back first fumarole in the disposal box with wafing in the said disposal box to the dust of drilling rod import department; Said each first fumarole is located in making progress in week of the said first sealing gland mouth and has separately and is used for and the inlet end of source of the gas connection and corresponding jet end, and the center line of each first fumarole is all drawn close to the center line of the said first sealing gland mouth from its inlet end separately to jet end gradually.
2. aperture according to claim 1 grit arrestor; It is characterized in that: the jet end of said each first fumarole all has a straight hole section, the center line of the straight hole section of each first fumarole all from front end to the rear end of said disposal box along the circumferencial direction conjugate deviation of the said first sealing gland mouth.
3. aperture according to claim 2 grit arrestor; It is characterized in that: described first air seal set comprises first tracheae; Said first tracheae surrounds the passage that supplies drilling rod to pass in said drilling rod import department; First air inlet that first tracheae has first gas channel and is used for said first gas channel is connected with source of the gas; Said each first fumarole is arranged at first tracheae on a side of said drilling rod outlet, and the inlet end of said each first fumarole is through said first gas channel and the first air inlet conducting.
4. aperture according to claim 3 grit arrestor; It is characterized in that: said first tracheae has first inclined-plane of taper towards a side of the drilling rod outlet of said disposal box; Gradually away from the center line of the said first sealing gland mouth, said first fumarole is arranged on said first inclined-plane from front end to the rear end of said disposal box on said first inclined-plane.
5. aperture according to claim 4 grit arrestor is characterized in that: said air seal set comprises that also sealing is assemblied in the sheath in the said drilling rod import, and said sheath is the tubular of both ends open, and said first tracheae is integrally formed on the inwall of said sheath.
6. aperture according to claim 5 grit arrestor is characterized in that: coaxial line is equipped with fire-retardant cover in the said sheath, and said fire-retardant putting has the fire-retardant passage that supplies drilling rod to pass, the internal diameter of the ring that the internal diameter of said fire-retardant passage surrounds less than said tracheae.
7. aperture according to claim 6 grit arrestor; It is characterized in that: a side of the drilling rod outlet in said first tracheae towards said disposal box in the said sheath is provided with and is used to prevent the air-flow that in said first fumarole, sprays first air baffle ring along the adherent walking of internal face of sheath; Have the resistance dirt passage that supplies drilling rod to pass on said first air baffle ring, said resistance dirt passage and center line and the central lines of the said first sealing gland mouth.
8. aperture according to claim 7 grit arrestor is characterized in that: said disposal box comprises the upper case half and the bottom half of mutual fastening, surrounds said drilling rod import and export after said upper and lower half chests body fastens.
9. aperture according to claim 8 grit arrestor; It is characterized in that: described sheath comprises first cover and second cover of mutual fastening; The said upper and lower correspondence of partly overlapping is fixed on the said upper and lower half chests body, and first puts and is fixed with upper tube half and first plate, and second puts and is fixed with lower tube half and second plate; Said upper and lower semicanal is spliced to form described first tracheae, and said upper and lower half plate is spliced to form said first air baffle ring.
10. according to each described aperture grit arrestor of claim 1-9; It is characterized in that: said slag-drip opening place is equipped with second air seal set; Said second air seal set comprises second tracheae; Said second tracheae is located in making progress in week of slag-drip opening and surrounds the slag passage that falls that a coal supply slag drops; Have second gas channel in second tracheae, have second air inlet that is used for being connected with source of the gas on its tube wall and be used for dust is upwards blown afloat second fumarole, said second fumarole is arranged at the upside of second tracheae and through said second gas channel and the said second air inlet conducting.
11. aperture according to claim 10 grit arrestor; It is characterized in that: the upside of said second tracheae has second inclined-plane of taper; Said second inclined-plane is from bottom to up gradually away from the center line of said slag-drip opening, and said second fumarole is arranged on the described tapered slope.
12. aperture according to claim 11 grit arrestor is characterized in that: be provided with second air baffle ring that is used to prevent from the air-flow of said second fumarole ejection along the adherent walking of internal face of disposal box in the said disposal box in the top of said second tracheae.
13. aperture according to claim 12 grit arrestor is characterized in that: the upside of said disposal box has and is used for the dust mouth that is connected with dust collecting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102161752A CN102359352A (en) | 2011-07-31 | 2011-07-31 | Porthole dust catcher |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102161752A CN102359352A (en) | 2011-07-31 | 2011-07-31 | Porthole dust catcher |
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| CN102359352A true CN102359352A (en) | 2012-02-22 |
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| CN104343402A (en) * | 2013-07-31 | 2015-02-11 | 卡特彼勒全球矿业美国有限责任公司 | Dust collection system for machine |
| CN110566142A (en) * | 2019-09-03 | 2019-12-13 | 辽宁省有色地质一〇一队有限责任公司 | Orifice dust collecting device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104343402A (en) * | 2013-07-31 | 2015-02-11 | 卡特彼勒全球矿业美国有限责任公司 | Dust collection system for machine |
| CN110566142A (en) * | 2019-09-03 | 2019-12-13 | 辽宁省有色地质一〇一队有限责任公司 | Orifice dust collecting device |
| CN110566142B (en) * | 2019-09-03 | 2024-05-03 | 辽宁省有色地质一〇一队有限责任公司 | Orifice dust collecting device |
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Application publication date: 20120222 |