CN204672950U - Hot-metal bottle slag removing system - Google Patents
Hot-metal bottle slag removing system Download PDFInfo
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- CN204672950U CN204672950U CN201520226280.8U CN201520226280U CN204672950U CN 204672950 U CN204672950 U CN 204672950U CN 201520226280 U CN201520226280 U CN 201520226280U CN 204672950 U CN204672950 U CN 204672950U
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Abstract
The utility model relates to a kind of hot-metal bottle slag removing system, comprises blowing slag-removing device, and this blowing slag-removing device comprises the detent mechanism of blowing cast slag gun and this blowing cast slag gun position, location; Described blowing cast slag gun comprises rifle head, described rifle head comprises the gun barrel of hollow, the gas distributor be connected with gun barrel and multiple nozzle, gas distributor comprises arc cavity, described multiple nozzle is spaced layout along the intrados of this arc cavity, the blowing direction of each nozzle is in same plane, and the length direction of this plane and gun barrel has an angle.The slag removing system that the utility model provides and the method operating time is short, iron loss is low, can reduce air-blowing quantity, therefore running cost is low, and slagging-off work is reliably safer.
Description
Technical field
The utility model relates to technical field of hot metal pretreatment, is specifically related to a kind of hot-metal bottle slag removing system.
Background technology
Desulfurizing iron is a necessary links in process for making, has a large amount of slags to swim in molten iron surface after desulfurizing iron.Skim fast and can shorten the desulfurization cycle, for other links in steel-making cycle gain time, reduce the amount of labour of operative employee simultaneously.Improve the cleanliness factor of skimming and can reduce back sulphur, improve desulfurized effect.The iron loss reducing desulphurization and slag skimming can save production cost, and increases the benefit.Therefore utility model one is skimmed fast, and can improve the method for skim cleanliness factor and minimizing iron loss, for steel improving product quality, raising productivity effect and production efficiency have very positive meaning simultaneously.
Blowing slag-removing technology is a kind of new technology for molten iron drossing operation.Application number is 201010269403.8 patent discloses a kind of blowing slag-removing device and catch up with slag method, application number be 201010272903.7 patent discloses a kind of blowing slag-removing equipment for molten iron pretreatment, they are by being inserted in molten iron by blowing cast slag gun, nitrogen forms bubble in molten iron inside, drive molten iron to roll in the process that bubble up emits and form wave, wave pushes away catches up with slag to assemble toward tank mouth direction, reaches the object of catching up with slag; Because rifle head inserts in molten iron by needs, molten iron constantly corrodes the resistance to material of rifle head, therefore needs often to change rifle head, considerably increases production cost and maintenance.Application number be 201120551436.1 patent discloses a kind of blowing slag-removing device, it catches up with slag rifle not extend in molten iron, but just molten iron level is blown, blow because of its single-point and catch up with slag there is no directionality, catch up with slag dynamics more weak and slag is not easily gathered at tank mouth, if air blowing flow is little, do not have the effect of catching up with slag; If air blowing flow greatly easily causes eddy current slag can not to be clawed by Cinder Machine to molten iron deep inside, and then causes molten iron cleanliness factor poor, also can cause molten iron splash in addition, burn rifle head even jeopardizes the personal safety of operating personnel.
The layout of the floss skimmer of prior art is all adopt to stretch into the method for rifle head from stirring top, position (during desulfurizing iron hot-metal bottle present position) in addition, and rifle head must wear cleaning shaft and mistake, not easily apparatus arrangement and affect dust removing effects.
Therefore be necessary to design a kind of hot-metal bottle slag removing system, to overcome the problems referred to above.
Utility model content
The purpose of this utility model is the defect overcoming prior art, provides a kind of hot-metal bottle slag removing system, and its slag-removing time is short, it is effective to remove the gred, molten iron cleanliness factor is high.
The utility model is achieved in that
The utility model provides a kind of hot-metal bottle slag removing system, comprises blowing slag-removing device, and described blowing slag-removing device comprises the detent mechanism of the described blowing cast slag gun position of blowing cast slag gun and location; Described blowing cast slag gun comprises rifle head, described rifle head comprises the gun barrel of hollow, the gas distributor be connected with described gun barrel and multiple nozzle, described gas distributor comprises arc cavity, described multiple nozzle is spaced layout along the intrados of described arc cavity, the blowing direction of each described nozzle is in same plane, and the length direction of described plane and described gun barrel has an angle.
Further, described angle is within the scope of 45 ° ~ 90 °.
Further, the radius of curvature of the extrados of described arc cavity is identical with the radius of curvature of described hot-metal bottle tank skin.
Further, described blowing cast slag gun also comprises the barral of a gun of hollow, and described barral of a gun and described gun barrel are by Flange joint, and described barral of a gun is connected with described detent mechanism.
Further, described detent mechanism comprises the swinging structure of the described blowing cast slag gun vertical direction position of transverse moving structure and location of locating described blowing cast slag gun horizontal level.
Further, described transverse moving structure comprise cross moving track, the travelling car that slides along described cross moving track and the actuator driving described travelling car to slide; Described swinging structure comprises lever and is located at oscillating oil cylinder on described travelling car, described lever vertically arrange and fulcrum and described travelling car hinged, described lever one end is connected with described oscillating oil cylinder, and the other end is connected with described barral of a gun.
Further, described hot-metal bottle slag removing system also comprises source of the gas, and described source of the gas is connected with described blowing cast slag gun by gas transmission main line; From described source of the gas to the direction of described blowing cast slag gun, described gas transmission main line automatic stop valve, pressure-reducing valve, control valve and check valve have been arranged in series successively, be provided with the first branch road between described check valve and described blowing cast slag gun, described first branch road is provided with relief valve.
Further, described gun barrel outer surface and described arc-shaped cavity external surface are all laid with refractory masses.
Further, described hot-metal bottle slag removing system also comprises device for removing slag, described device for removing slag comprises operating desk, is located at the tracks on described operating desk and the Cinder Machine along described tracks movement, the middle position of described tracks is provided with proximity switch, and described operating desk is provided with the control button controlling described proximity switch and whether work.
The utility model has following beneficial effect: the blowing cast slag gun that the utility model provides does not stretch in molten iron, and the loss of rifle head is little, effectively reduces equipment cost and maintenance cost.Carry out blowing slag-removing by arranging multiple nozzle at rifle head, what the wave-like of formation effectively can improve the scum silica frost of filling with mouth place gathers effect, and iron loss is low, and shorten and catch up with the slag time, therefore running cost is low, and slagging-off work is reliably safer.The stand-by period of subsequent handling can be shortened, can output be improved, reduce the energy consumption of whole process for making, effectively improve productivity effect.
Further beneficial effect of the present utility model is: by arranging transverse moving structure and swinging structure, the locus of blowing cast slag gun can be controlled flexibly, facilitate the layout of blowing cast slag gun and relevant device, make blowing cast slag gun can not stretch into rifle head above stirring position, thus dust pelletizing system is not had an impact.In air blowing process, can according to the position of the distribution situation adjustment rifle head of the quantity of slag of molten iron level and slag, namely multiple spot is blown, and effectively improves slagging-off effect, shortens the slagging-off time.
Further beneficial effect of the present utility model is: by arranging check valve and relief valve, and check valve can prevent from making rifle body suck hot gas even molten iron because of gas backflow, thus catches up with slag rifle to shield to blowing slag; Relief valve can ensure that under any circumstance blow gas pressure is all in the safe range of setting, avoids splash accident occurs, thus makes blowing slag-removing work reliably safer.
Further beneficial effect of the present utility model is: by arranging proximity switch, prevents Cinder Machine and blowing cast slag gun from colliding, and improves the safety and reliability of blowing slag-removing work further.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the hot-metal bottle slag removing system that Fig. 1 provides for the utility model embodiment;
The structural representation of the blowing slag-removing device that Fig. 2 provides for the utility model embodiment;
The structural representation of the rifle head that Fig. 3 provides for the utility model embodiment;
Fig. 4 is the sectional view of Fig. 3 along A-A;
The structural representation of the feeder that Fig. 5 provides for the utility model embodiment;
The effect schematic diagram of the use porous blowing slag-removing that Fig. 6 provides for the utility model embodiment;
The effect schematic diagram of the use single hole blowing slag-removing that Fig. 7 provides for the utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope of the utility model protection.
As Fig. 1-Fig. 7, the utility model embodiment provides a kind of hot-metal bottle slag removing system, comprises blowing slag-removing device 1 and device for removing slag; Described device for removing slag comprises operating desk, be located at the Cinder Machine 2 of tracks on described operating desk and movement in described tracks.Described blowing slag-removing device 1 comprises the detent mechanism of the described blowing cast slag gun position of blowing cast slag gun and location; The barral of a gun 10 that described blowing cast slag gun comprises hollow and the rifle head 11 be connected with barral of a gun 10, described rifle head 11 comprises the gun barrel 12 of hollow, the gas distributor be connected with described gun barrel 12 and multiple nozzle 14, described gas distributor comprises arc cavity 13, described multiple nozzle 14 is spaced layout along the intrados of described arc cavity 13, the blowing direction of each described nozzle 14 is in same plane, and the length direction of described plane and described gun barrel 12 has an angle.Wherein, this arc cavity 13 comprises the less intrados of the larger extrados of radius, radius and connects two sides of described extrados and intrados, above-mentioned gun barrel 12 can be connected with one of them side, also be connected with described extrados by a bend pipe, preferably be connected with one of them side, through hole offered in the side of junction to dock UNICOM with the hollow bowl of gun barrel 12; Namely this rifle head 11 is rake shape, and gun barrel 12 is the handle portion of this rake, and namely multiple nozzle 14 forms the spike-tooth part of this rake.During installation, the blowing direction of nozzle 14 is towards operating desk side.The plane at the blowing direction place of each nozzle 14 and the angle of gun barrel 12 length direction should not too little also should not be too large, as can not be parallel with gun barrel 12 length direction or close to parallel; To realize when rifle head 11 extend into above molten iron, it is basically identical with the incline direction of hot-metal bottle 3 and become a less angle to be good with molten iron level that detent mechanism can adjust the blowing direction of nozzle 14; Preferably, this angle is within the scope of 45 ° ~ 90 °, and as shown in Figure 4, in the present embodiment, this angle is 90 °.In addition, described gun barrel 12 outer surface and described arc cavity 13 outer surface are all laid with refractory masses, prevent molten iron splash burn rifle head 11.
As Fig. 3-Fig. 4, the width of intrados can, slightly larger than the diameter of nozzle 14, make the gas entered in arc cavity 13 can enter nozzle 14 fast, to improve jet speed; Each nozzle 14 is parallel interval arrangement on this intrados, shape nozzle 14 in a row.In addition, the radius of curvature of the extrados of described arc cavity 13 and the radius of curvature of described hot-metal bottle 3 tank skin same or equivalent, make blowing cast slag gun can be suitable for tank skin shape better, thus make blow-out position as far as possible rearward, maximum minimizing dead angle, makes scum silica frost 25 as much as possible get the gate.As Figure 6-Figure 7, utility model people has carried out a multiple nozzle 14 of row and single-nozzle 14 carries out the contrast experiment of blowing slag-removing: porous is blown, the scum silica frost 25 at this place can be pushed away by the reaction force of tank skin and tangential force and catch up with by the wave formed near tank skin in the middle part of hot-metal bottle 3, and what therefore porous blew that the wave-like that formed effectively can improve the scum silica frost 25 of filling with mouth place gathers effect; And the wave-like that single hole air blowing is formed is circular arc, catch up with effect poor for blowing of the scum silica frost 25 near tank skin.The radius of curvature of the intrados of this arc cavity 13 can be identical with the radius of curvature of extrados or be greater than the radius of curvature of extrados, as this intrados is designed to plane, the wave-like formed during blowing gas is linear pattern, in the present embodiment, preferably intrados and extrados adopt identical radius of curvature, as shown in Figure 6, the wave-like of the formation scum silica frost 25 be more conducive near tank skin pushes away and catches up with in the middle part of hot-metal bottle 3.
As Fig. 1-Fig. 3, described barral of a gun 10 and described gun barrel 12 are by Flange joint, and hollow tube one end of barral of a gun 10 is docked UNICOM with the hollow tube of gun barrel 12 and formed gas passage, and the other end connects source of the gas 15, takes this mode to facilitate the replacing of rifle head 11 to safeguard.Described barral of a gun 10 is connected with described detent mechanism, makes detent mechanism can adjust the position of location rifle head 11.Further, described detent mechanism comprises the swinging structure of the described blowing cast slag gun vertical direction position of transverse moving structure and location of locating described blowing cast slag gun horizontal level.Preferably, the travelling car 7 that described transverse moving structure comprises cross moving track 5, slide along described cross moving track 5 and the actuator 6 driving described travelling car 7 to slide, cross moving track 5 is horizontally fixed in structural beams 4, this structural beams 4 can be located on the platform structure above Cinder Machine 2 nearby, and described actuator 6 can be reducing motor; Described swinging structure comprises lever 9 and is located at the oscillating oil cylinder 8 on described travelling car 7, described lever 9 vertically arrange and fulcrum and described travelling car 7 hinged, described lever 9 one end is connected with described oscillating oil cylinder 8, and the other end is connected with described barral of a gun 10.Certainly, also can take other structures, as transverse moving structure can take the mode of rack pinion, or adopt electric pushrod etc., blowing cast slag gun transverse shifting and longitudinal oscillation can be realized.By transverse moving structure adjustment rifle head 11 position in the horizontal direction, by the position of swinging structure adjustment rifle head 11 in the vertical direction, thus the locus of location rifle head 11; Take this structure, facilitate the layout of blowing cast slag gun and relevant device, as blowing slag-removing device 1 being located at the top of device for removing slag, taking up an area little, facilitate centralized operation; Blowing cast slag gun can not stretch into rifle head above stirring position, thus does not have an impact to dust pelletizing system.Catch up with in slag operation actual, along with the carrying out blown, the quantity of slag of molten iron level is fewer and feweri, now drives rifle head 11 to move to filling mouth gradually by transverse moving structure, namely takes multiple spot to blow, effectively can improve and catch up with slag efficiency, reduce air-blowing quantity.
As a kind of preferred structure of embodiment, be provided with proximity switch 24 in the middle position of the tracks of described Cinder Machine 2, described operating desk is provided with the control button controlling described proximity switch 24 and whether work.This proximity switch 24, for limiting the shift motion of Cinder Machine 2 in tracks, avoids this Cinder Machine 2 to collide with blowing cast slag gun; Therefore, the installation site of this proximity switch 24 should be determined according to actual conditions, as diameter and the inclined degree of hot-metal bottle 3, the elongation etc. of Cinder Machine 2 and blowing cast slag gun, control the distance between Cinder Machine 2 and blowing cast slag gun by this proximity switch 24, handled easily can not cause again equipment to collide.The effect of control button is: when carrying out blowing slag-removing operation, proximity switch 24 works, and restriction Cinder Machine 2 stroke, prevents Cinder Machine 2 from knocking blowing cast slag gun; When operating without blowing slag-removing, proximity switch 24 is invalid, and Cinder Machine 2 recovers normal travel.
As Fig. 5, as a kind of preferred structure of embodiment, the feeder of described hot-metal bottle slag removing system takes following structure: source of the gas 15 adopts nitrogen, and described source of the gas 15 is connected with described blowing cast slag gun by gas transmission main line; From described source of the gas 15 to the direction of described blowing cast slag gun, described gas transmission main line is arranged in series successively automatic stop valve 18, pressure-reducing valve 19, control valve 20 and check valve 21, be provided with the first branch road between described check valve 21 and described blowing cast slag gun, described first branch road is provided with relief valve 23.Wherein, described automatic stop valve 18 is pneumatic stopping valve or electric check valve, and described control valve 20 is pneumatic control valve or electric control valve; This automatic stop valve 18 is connected with hot metal pre process procedures control system respectively with the operating circuit of control valve 20, is connected by automatic stop valve 18 with hot metal pre process procedures control system, can realize remote-controlled gas break-make; Control valve 20 is connected with hot metal pre process procedures control system, can remote adjustment gas pressure, thus realize automatically regulating in real time blow gas pressure.Pressure-reducing valve 19 can make gas pressure drop in working pressure range; Check valve 21 can prevent from making rifle body suck hot gas even molten iron because of gas backflow, thus catches up with slag rifle to shield to blowing slag; Relief valve 23 can ensure that under any circumstance blow gas pressure is all in the safe range of setting, avoids splash accident occurs.By taking above structure, the gas control equipment work that the present embodiment is provided is more reliable and stable, improves the security of blowing slag-removing operation.
As a kind of preferred structure of the present embodiment, be provided with the second branch road between described control valve 20 and check valve 21, described second branch road is provided with pressure transmitter 22, and described pressure transmitter 22 is connected with hot metal pre process procedures control system.Air pressure after control valve 20 can be fed back to hot metal pre process procedures control system by pressure transmitter 22 in real time, to carry out remote auto control.Further, described gas transmission main line also can arrange hand stop valve 16, described hand stop valve 16 is located between automatic stop valve 18 and source of the gas 15, cuts off source of the gas 15 when hand stop valve 16 is for overhauling.Between pressure-reducing valve 19 and control valve 20, be provided with Pressure gauge 17, between control valve 20 and check valve 21, be provided with Pressure gauge 17, between automatic stop valve 18 and hand stop valve 16, be provided with Pressure gauge 17, can real time inspection loine pressure; Described each Pressure gauge 17 can be accessed by hot metal pre process procedures control system, and real-time pressure data is fed back to control system, ensures the accuracy of data further, improves functional reliability.
The method that the hot-metal bottle slag removing system that the utility model embodiment provides carries out removing the gred comprises the following steps:
ST1: hot-metal bottle 3 is tilted to position of skimming, detent mechanism drives described rifle head 11 to extend above molten iron, and the blowing direction of nozzle 14 towards Guan Kou side, and adjusts nozzle 14 and the distance of molten iron level and the angle of nozzle 14 blowing direction and molten iron level.
ST2: the ventilation of described blowing cast slag gun, constantly forms wave at molten iron level, and the slag that wave pushes molten iron level is concentrated to tank mouth place, while air blowing, the slag after concentrating claws by Cinder Machine 2; The blowing method of initial stage employing low discharge, along with slag is fewer and feweri, air blowing flow slowly increases or transverse moving structure drives rifle head 11 to move to filling mouth gradually.
ST3: after having skimmed, Cinder Machine 2 and blowing cast slag gun exit hot-metal bottle 3 successively, and hot-metal bottle 3 is back to normal position.
The utility model embodiment has following beneficial effect: the blowing cast slag gun that the utility model provides does not stretch in molten iron, and rifle head 11 loss is little, effectively reduces equipment cost and maintenance cost.Carry out blowing slag-removing by arranging multiple nozzle 14 at rifle head 11, what the wave-like of formation effectively can improve the scum silica frost 25 of filling with mouth place gathers effect, and iron loss is low, shortens and catches up with the slag time.
The further beneficial effect of the utility model embodiment is: by arranging check valve 21 and relief valve 23, and check valve 21 can prevent from making rifle body suck hot gas even molten iron because of gas backflow, thus catches up with slag rifle to shield to blowing slag; Relief valve 23 can ensure that under any circumstance blow gas pressure is all in the safe range of setting, avoids splash accident occurs, thus makes blowing slag-removing work reliably safer.
The further beneficial effect of the utility model embodiment is: by arranging proximity switch 24, prevents Cinder Machine 2 and blowing cast slag gun from colliding, improves the safety and reliability of blowing slag-removing work further.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (9)
1. a hot-metal bottle slag removing system, comprises blowing slag-removing device, it is characterized in that: described blowing slag-removing device comprises the detent mechanism of the described blowing cast slag gun position of blowing cast slag gun and location; Described blowing cast slag gun comprises rifle head, described rifle head comprises the gun barrel of hollow, the gas distributor be connected with described gun barrel and multiple nozzle, described gas distributor comprises arc cavity, described multiple nozzle is spaced layout along the intrados of described arc cavity, the blowing direction of each described nozzle is in same plane, and the length direction of described plane and described gun barrel has an angle.
2. hot-metal bottle slag removing system according to claim 1, is characterized in that: described angle is within the scope of 45 ° ~ 90 °.
3. hot-metal bottle slag removing system according to claim 1, is characterized in that: the radius of curvature of the extrados of described arc cavity is identical with the radius of curvature of described hot-metal bottle tank skin.
4. hot-metal bottle slag removing system according to claim 1, is characterized in that: described blowing cast slag gun also comprises the barral of a gun of hollow, and described barral of a gun and described gun barrel are by Flange joint, and described barral of a gun is connected with described detent mechanism.
5. hot-metal bottle slag removing system according to claim 4, is characterized in that: described detent mechanism comprises the swinging structure of the described blowing cast slag gun vertical direction position of transverse moving structure and location of locating described blowing cast slag gun horizontal level.
6. hot-metal bottle slag removing system according to claim 5, is characterized in that: described transverse moving structure comprises cross moving track, the travelling car that slides along described cross moving track and the actuator driving described travelling car to slide; Described swinging structure comprises lever and is located at oscillating oil cylinder on described travelling car, described lever vertically arrange and fulcrum and described travelling car hinged, described lever one end is connected with described oscillating oil cylinder, and the other end is connected with described barral of a gun.
7. hot-metal bottle slag removing system according to claim 1, is characterized in that: described hot-metal bottle slag removing system also comprises source of the gas, and described source of the gas is connected with described blowing cast slag gun by gas transmission main line; From described source of the gas to the direction of described blowing cast slag gun, described gas transmission main line automatic stop valve, pressure-reducing valve, control valve and check valve have been arranged in series successively, be provided with the first branch road between described check valve and described blowing cast slag gun, described first branch road is provided with relief valve.
8. hot-metal bottle slag removing system according to claim 1, is characterized in that: described gun barrel outer surface and described arc-shaped cavity external surface are all laid with refractory masses.
9. hot-metal bottle slag removing system according to claim 1, it is characterized in that: described hot-metal bottle slag removing system also comprises device for removing slag, described device for removing slag comprises operating desk, is located at the tracks on described operating desk and the Cinder Machine along described tracks movement, the middle position of described tracks is provided with proximity switch, and described operating desk is provided with the control button controlling described proximity switch and whether work.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759613A (en) * | 2015-04-15 | 2015-07-08 | 中冶南方工程技术有限公司 | Molten iron tank slag removal system and method |
| CN108817371A (en) * | 2018-07-25 | 2018-11-16 | 四川省川建管道有限公司 | It is a kind of for clearing away the device and its application method of iron liquid surface scum |
| CN111690791A (en) * | 2020-07-08 | 2020-09-22 | 武汉科技大学 | Gas curtain non-contact full-coverage type slag skimming equipment and method after molten iron desulfurization |
| CN112902651A (en) * | 2021-04-02 | 2021-06-04 | 电信科学技术仪表研究所有限公司 | PCBA board blowing cleaning device and use method thereof |
| CN113528718A (en) * | 2021-06-02 | 2021-10-22 | 镇江市坤洋冶金设备有限公司 | Automatic connecting device for gun head of air blowing slag removing gun |
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2015
- 2015-04-15 CN CN201520226280.8U patent/CN204672950U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104759613A (en) * | 2015-04-15 | 2015-07-08 | 中冶南方工程技术有限公司 | Molten iron tank slag removal system and method |
| CN108817371A (en) * | 2018-07-25 | 2018-11-16 | 四川省川建管道有限公司 | It is a kind of for clearing away the device and its application method of iron liquid surface scum |
| CN111690791A (en) * | 2020-07-08 | 2020-09-22 | 武汉科技大学 | Gas curtain non-contact full-coverage type slag skimming equipment and method after molten iron desulfurization |
| CN112902651A (en) * | 2021-04-02 | 2021-06-04 | 电信科学技术仪表研究所有限公司 | PCBA board blowing cleaning device and use method thereof |
| CN112902651B (en) * | 2021-04-02 | 2022-08-05 | 电信科学技术仪表研究所有限公司 | PCBA board blowing cleaning device and use method thereof |
| CN113528718A (en) * | 2021-06-02 | 2021-10-22 | 镇江市坤洋冶金设备有限公司 | Automatic connecting device for gun head of air blowing slag removing gun |
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