CN203306739U - Novel coal conveying bin pump with output blockage prevention function - Google Patents
Novel coal conveying bin pump with output blockage prevention function Download PDFInfo
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- CN203306739U CN203306739U CN2013203547586U CN201320354758U CN203306739U CN 203306739 U CN203306739 U CN 203306739U CN 2013203547586 U CN2013203547586 U CN 2013203547586U CN 201320354758 U CN201320354758 U CN 201320354758U CN 203306739 U CN203306739 U CN 203306739U
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Abstract
A novel coal conveying bin pump with an output blockage prevention function comprises a bin body, a pulverized coal bin, a coaling pipeline, a pressurizing pipeline, a gas inlet pipeline, a mixing chamber, a conveying pipeline, a blowing pipeline, a gas supplying pipeline, a coaling fluidization pipeline and a gas exhaust pipeline, wherein a choking meshed plate is arranged between the bottom of the bin body and the mixing chamber; the pressurizing pipeline comprises an upper pressurizing pipe and a lower fluidization pipe; a pressure regulating valve is arranged on the pressurizing pipeline; an outlet cut-off valve is arranged at the initial terminal of the conveying pipeline; the blowing pipeline is connected with the rear part of the cut-off valve. The novel coal conveying bin pump has the advantages that remote conveying of large-flow pulverized coal is realized; the powder-gas ratio is high; gas is saved remarkably; multi-stage pressure protection and automatic constant pressure regulation are realized; the phenomenon of coal conveying pipeline blockage of a bin pump with a longer horizontal outlet pipe is avoided; the material and energy consumption is reduced; the normal production is guaranteed.
Description
Technical field
The utility model relates to the strength transportation art, belongs to the novel defeated coal cone pump of a kind of outlet anti-clogging of the large flow of low pressure.
Background technology
At present, the normal production of domestic blast furnace all can, in stove, carrying out coal powder injection, also will be equipped with the relevant devices such as coal grinder.If the powder process ability is enough large, can also can utilize coal dust to act as a fuel or the equipment place of supplemental fuel carries out defeated coal to other, can save the relevant device capital fund like this.For coal dust smooth and easy conveying in flow ground greatly in pipeline, the past pulverized coal conveying at a distance of pulverized coal preparation system is substantially all selected the dense phase pump load transfer device now, i.e. the cone pump of common name.During conveying, by the power gas mixed coal powder, it is sent to required field of employment in sealed cabin body.
In the normal process of pulverized coal conveying, after cone pump is carried a bit of horizontal feed pipeline of outlet, all need to design one section vertical uplift pipeline, utilize solid gravity decline gas flow to rise, increase the boiling fluidisation mixed effect of conveying gas and coal dust (as shown in Figure 1, in figure, 101 is vertical pipeline section boiling fluidisation interface point), it only exists in pipeline mixture to prevent effectively in horizontal pipeline section that coal dust occurs gathers obstruction after because of the rising pipeline section, but utilizes the method to make dense phase pump lose its original intention of carrying as the concentrated phase strength.The powder controlled atmosphere throttling mixing that should carry out in comparatively roomy blending box, change in the straight length of cross section less and carry out, and powder gas concentration will reduce, and same operational throughput will increase gas consumption.And if transfer line is even by the ascent stage sublevel, or pipeline tilts to install, or point of delivery and the acceptance point sea level elevation very nearly the same, in cone pump mixing Indoor Air and the rational situation of powder adjustment, feed status is except denseer mixture flows, mixed airflow can also the drive level or the powder of tilted tube bottom deposition do flowing and carry forward of sand dune shape, improved transport efficiency.But in current existing technique, unreasonable because of the cone pump structure, blending box does not have the gentle ratio of powder and regulates and fully mix, transfer out the flat pipeline of mouthful horizontal saliva when longer, continue high dense coal dust and supply with and will make the bottom powder layer thickness in horizontal pipe more and more higher, coal dust in horizontal pipe the filling long enough apart from the time, resistance increases, air-flow reduces, and finally will cause the pipeline plugging accident (as shown in Figure 2, in figure 201 stop up point for horizontal pipeline section coal dust gathers) of pipe choking.
The to sum up analysis of two kinds of mounting processs, can reduce or remit pipeline jam accident though outlet adds vertical pipeline section, and powder to air ratio can't promote, and gas consumption increases.Particularly coal dust is carried for safety and aqueous ingredients two aspects and is considered, generally usings nitrogen as pumped (conveying) medium.Powder to air ratio can't rise to peak, can't reach energy-saving effect.Though and the mode of movement of level and inclination pipeline can reach the dense conveying of Mi Xianggao in theory, there is defect in existing cone pump structure, the easy plugging of high dense conveying, adopting time conveying of the little loadings multifrequency of every batch of material to consume gas increases, valve shortening in service life.And, after high dense conveying frequently plugging occurs, except impact is produced, get rid of plugging also to want labor intensive, separately need to consume source of the gas, the waste coal dust.Plugging also can cause the bleed pressure value of warehouse pressure rise to relatively high pressure in addition, and the sealing property of each valve is exerted an influence.
The utility model content
The technical problems to be solved in the utility model is: provide a kind of outlet anti-clogging novel defeated coal cone pump, can automatically regulate lower coal amount by pressure setting; The multistage pressure protection, prevent plugging; According to operating mode, progressively improve powder to air ratio, reduce nitrogen consumption, save the energy; Increase airshed and lower coal amount, promote traffic capacity, enhance productivity.
The technical scheme that its technical matters that solves the utility model adopts is: the novel defeated coal cone pump of a kind of outlet anti-clogging, comprise warehouse, Pulverized Coal Bin, blending box, the pipeline of coalingging, the pressurising pipeline, admission line, transfer line, scavenging pipeline, the tonifying Qi pipeline, the fluidisation of coalingging pipeline and bleeder line, described warehouse top is communicated with at the bottom of Pulverized Coal Bin by the pipeline of coalingging, Pulverized Coal Bin tapering and the fluidisation pipeline connection of coalingging, between warehouse and Pulverized Coal Bin, be connected bleeder line, warehouse one side and pressurising pipeline connection, the warehouse bottom is communicated with blending box, between described blending box and warehouse, be provided with the choked flow web plate, blending box and admission line, transfer line is communicated with, described transfer line initial end is provided with the outlet shutoff valve, on transfer line after the outlet shutoff valve, connect scavenging pipeline, transfer line and tonifying Qi pipeline connection, described tonifying Qi pipeline and pressurising pipeline connection.
Described pressurising pipeline comprises the upper pressurising pipe be communicated with the warehouse top and the lower fluidisation pipe be communicated with the blending box of warehouse bottom, the mouth of described lower fluidisation pipe is connected with short tube, described short tube extends to choked flow web plate top, is provided with pressure-modulation valve on the pressurising pipeline.
The characteristics of the novel defeated coal cone pump of the utility model outlet anti-clogging below are described in detail in detail:
At first, to be mostly outlet spacious empty due to the structure of cone pump, in order to reach the gentle purpose that can mix of powder, a slice choked flow web plate is installed between the flange of warehouse bottom and bottom blending box, like this, after conveying gas was opened, it was not just coal dust in the storehouse of whole accumulation that air-flow is met right, but the part coal dust from flowing out mesh.The conveying gas flow is certain, by regulating lower coal amount, just can change powder to air ratio.
Described choked flow web plate is round plate, on round plate, evenly has some mesh, and the choked flow web plate is easy to process, and tooling cost is lower.
Then, the fluidisation hole on original blending box is drawn to a short tube to more than the choked flow web plate, as the lower fluidisation of warehouse pressurising pipeline.It can form a cyclone district on the choked flow web plate, pulverize low intensive moisture knot coal dust piece, can prevent that the moisture knot coal dust from stopping up choked flow web plate hole, weakens lower coal regulating power.This short tube is communicated with pressurising pipe on warehouse by lower fluidisation pipe, and source of the gas is regulated in access, then seals in a pressure-modulation valve.By the aperture of system automatic regulating valve, control the pressurising airshed, thereby control lower coal amount.Powder to air ratio increases in delivery duct, and storehouse is pressed and will be risen, and system can turn down the pressurising suction quantity automatically, and lower coal amount reduces thereupon, and the coal amount reduces rear chimneying resistance and reduces, and pressure drop, valve are opened coal amount under large increasing more automatically.So just reached by setting pressure and put the purpose of dynamically regulating powder to air ratio, neither can cause plugging, do not wasted again source of the gas.
Secondly, because can seeing through the choked flow web plate, some coal dust in the process of coalingging enters blending box, the automatic cycle stopping transportation is supplied gas in rear storehouse and also can be brought the part bed material into when overbottom pressure discharges to delivery duct, still plugging may occur in the next conveying gas unlatching starting stage like this, therefore in the transfer line initial end, increase by a road scavenging pipeline, when the system auto state always with a low discharge gas flow purging transfer line.It is except being transported away the bed material powder of transfer line initial segment, can also in the system auto-programming, suitably improve the force value of circulation terminal, by clout amount in bed material discharge rate and whole pipeline in the storehouse increased, in the charging flow process, transfer to sweep gas and complete conveying, consequently reduced by the time of delivery of every batch, increased efficiency.
Finally, because adopting the negative pressure cloth bag, delivery system receives the mode of powder, in the process of coalingging, some coal dust is inhaled in the delivery duct of negative pressure, the coning tower tray of the Pulverized Coal Bin of the conduit upper of coalingging also can impact coal dust and enter delivery duct after melting and opening, coaling the time more progress to enter the coal dust of delivery duct more, weighing exerts an influence to warehouse for this, also may cause plugging in addition, therefore in the delivery duct initial end, increase an outlet shutoff valve, avoided the generation of above-mentioned situation.
In addition, (as large as the pulverized coal water content high viscosity under special circumstances, misoperation etc.), if also plugging can occur, as the low discharge by above-mentioned, purge and can't carry out the block clearing operation, perhaps plugging back cabin body internal pressure does not descend continually and steadily, or opens after blow off valve release and purge still invalidly again, can clear up obstruction by manual block clearing pipeline.
The novel defeated coal cone pump of the utility model outlet anti-clogging has following advantage:
(1) increased a slice choked flow web plate, thereby made conveying gas and coal dust that the possibility of the mixing adjusted be arranged, can reach best lower coal speed, and prevent plugging;
(2) lower fluidisation pipe draws short tube to choked flow web plate upper surface, has increased fluidisation, prevents that choked flow web plate bore portion from stopping up;
(3) increased a pressure-modulation valve, pressure-modulation valve can be controlled flow of aerating air in warehouse, thereby it is controlled to reach lower coal amount, and the dynamic adjustments powder to air ratio, also can adjust parameter according to field working conditions, and alerting ability is good;
(4) on transfer line, increase by a road scavenging pipeline, can constantly to transfer line, carry out gas flow purging, further prevent plugging;
(5) in the transfer line initial end, increase the outlet shutoff valve, guaranteed continuous data, and also can prevent from carrying the plugging at initial stage to occur.
The accompanying drawing explanation
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the part-structure schematic diagram of prior art middle outlet pipeline section cone pump vertically upward;
Fig. 2 is the part-structure schematic diagram of the cone pump of prior art middle outlet pipeline section level;
Fig. 3 is the novel defeated coal bunker formula pump structure schematic diagram of the utility model outlet anti-clogging;
In figure: 1. warehouse, 2. the pipeline of coalingging, 3. charging valve, 4. Pulverized Coal Bin, 5. bleeder line, 6. blow off valve, 7. the fluidisation of coalingging pipeline, 8. coning tower tray valve, 9. pressure tester, 10. admission line, 11. reducing valve, 12. transfer valve, 13. blending box, 14. transfer line, 15. outlet shutoff valve, 16. scavenging pipeline, 17. blow down valve, 18. block clearing pipeline, 19. manual block clearing valve, 20. tonifying Qi pipeline, 21. fluidisation gulp valve, 22. tonifying Qi reducing valve, 23. valve is propped up in tonifying Qi, 24. pressurising pipeline, 25. pressure-modulation valve, 26. lower fluidisation pipe, 27. upper pressurising pipe, 28. choked flow web plate, 29. short tube, 101. vertical pipeline section boiling fluidisation interface point, 201. horizontal pipeline section coal dust gathers the obstruction point.
The specific embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model only is described in a schematic way, so it only show the formation relevant with the utility model.
As shown in Figure 3, the novel defeated coal cone pump of a kind of outlet anti-clogging, comprise warehouse 1, the pipeline 2 of coalingging, bleeder line 5, the fluidisation of coalingging pipeline 7, pressure tester 9, admission line 10, blending box 13, transfer line 14, scavenging pipeline 16, manual compositions such as block clearing pipeline 18, tonifying Qi pipeline 20, pressurising pipeline 24, choked flow web plate 28.It is divided into charging, conveying, adjusting, manual intervention four bulks substantially.Below in conjunction with diagram, describe in detail.
In Fig. 3, feed one and substantially comprise following facility: the warehouse 1 of the coal dust of intending packing into; The coaling charging valve 3 of pipeline 2, it is composed in series by two clock valves, the sealing reliability in the time of can increasing strength and carry; The Pulverized Coal Bin 4 on charging valve 3 tops is sources, storehouse of pulverized coal conveying.When plan is coaling, first open the blow off valve 6 of warehouse 1 upper exhaust line 5, bleeder line 5 is connected to Pulverized Coal Bin 4 tops, because Pulverized Coal Bin 4 has the powder of receipts bag dust collector, in storehouse, be negative pressure, blow off valve 6 is opened in back cabin body 1 and also just is communicated with for negative pressure state, ready for coalingging.In addition, charging valve 3 is opened respectively from the bottom to top, and Pulverized Coal Bin 4 starts to the interior charging of warehouse 1.For accelerating charging speed, can be according to opening time point and the time length of the coning tower tray valve 8 on the default fluidisation pipeline 7 of coalingging of operating mode.Opening of coning tower tray valve 8, one can accelerate charging speed, and two can purge bleeder line 5 indirectly, and the coal dust flow velocity of sneaking into while making it be unlikely because of natural exhaust is deposition obstruction gradually slowly, loses exhaust effect, and impact is coaling.When the coal dust in warehouse 1 is packed weight into while reaching certain value, control system is first closed top charging valve 3 automatically, then closes bottom charging valve 3, finally closes blow off valve 6, automatically completes charging process.This wherein, coning tower tray valve 8, because default duration of valve opening is less than charge time, has been in closed condition.
In Fig. 3, carry one and substantially comprise following facility: admission line 10 provides main supplying nitrogen, and pipeline comprises Self-operated reducing valve 11, transfer valve 12; Admission line connects blending box 13 left ends, blending box 13 right-hand member connecting conveying pipe roads 14, and blending box 13 upper ends connect warehouses 1, between itself and warehouse 1, a slice choked flow web plate 28 are installed; On transfer line 14, an outlet shutoff valve 15 is installed, has access to thinner scavenging pipeline 16 after outlet shutoff valve 15, scavenging pipeline 16 is provided with blow down valve 17; Another tonifying Qi pipeline 20 and transfer line 14 are parallel, and it is some that segmentation is propped up valve 23 to access tonifying Qi on transfer line 14, and it is fluidisation gulp valve 21 that a shutoff valve is arranged on tonifying Qi pipeline 20, and a manual tonifying Qi reducing valve 22 is arranged thereafter.When system proceeds to feed status by having coaling in automatically, at first open outlet shutoff valve 15, then open gulp valve 21, after open transfer valve 12, start to carry out defeated coal process.The judging point that defeated coal finishes is pressure tester 9, and warehouse 1 internal pressure rises gradually after carrying beginning, and while in transfer line 14 whole tube sections, all comprising powder gas mixture, resistance reaches maxim, and warehouse 1 pressure is in maxim thereupon.Carry rear, the interior coal dust amount of warehouse 1 is asymptotic is zero, and powder to air ratio descends, in pipeline powder to air ratio also gradually under gradually, storehouse is pressed and is decreased.When storehouse, press while being reduced to a default force value, namely give tacit consent to this batch of material and carried, automatically proceed to the charging process of next batch of material.
In defeated coal process, variotrol have or not and quality is related to input and the expenditure of continuous production and human and material resources.During cone pump before the utility model is practical is used, or system conveying powder to air ratio is low, and energy consumption is large, or frequent plugging, lost labor and raw material.Characteristics of the present utility model just are can the dynamic adjustments operating mode, when promoting powder to air ratio and reduce gas consumption, eliminates the plugging phenomenon fully, has avoided extra human input and nitrogen and coal dust loss.One of automatic adjusting of the present utility model comprises following facility: pressurising pipeline 24, pneumatic pressure-regulating valve 25, upper pressurising pipe 27, lower fluidisation pipe 26, choked flow web plate 28, while separately comprising a road auto state often open scavenging pipeline 16 and on blow down valve 17.Below describe in detail.
In Fig. 3, pressurising pipeline 24 is connected in tonifying Qi pipeline 20, one characteristic requirements because of the pressure-modulation valve 25 on pressurising pipeline 24, pressure-modulation valve 25 is general without hermetically sealed index, therefore in basic production technology, be all be installed on shutoff valve after, two because existing cone pump master transfer valve 12 namely connects blending box 13 afterwards, can't set up stable high pressure after its valve, for fear of adding again an independently pressurising shutoff valve, so after pressurising pipeline 24 is taken at gulp valve 21.After carry starting, the opening time point of pressure-modulation valve 25 monitoring transfer valves 12, add a modifiable time delay after control cock drop into automatically, valve is the complete shut-down state before.Why add time delay, gather because in the process of coalingging, there being coal dust can bleed in blending box 13, carry start after coal under direct weighting, plugging likely occurs.After pressure-modulation valve 25 dropped into automatically, it compared according to the force value in warehouse 1 and preset value, by the PID computing, and the aperture of dynamic regulating valve.The large pressure rise of the many resistances of powder closes minor valve, and the few resistance of powder lowers opens large valve, and valve opening affects the interior charge air of warehouse 1, and charge air affects the lower coal speed in choked flow web plate 28.Carrying the intermediary, the action of pressure-modulation valve 25 remains near preset value the pressure in warehouse 1, and powder to air ratio reaches maxim.Carrying after-stage, because coal dust amount in storehouse reduces, even reaching standard-sized sheet, pressure-modulation valve 25 can not keep preset pressure value, now be in coal dust feed status in pipeline, powder to air ratio descends to some extent.When pressure, during lower than another preset value, assert that namely course of conveying completes, finish to carry flow process.
Scavenging pipeline 16 is produced actual increasing for the utility model for reply, and effect obviously.In order to save nitrogen, when stopping using, coal handling system can guarantee to cut off all source of the gas output, in scavenging pipeline 16, add pneumatic cut-off valve 17.It transfers to when automatic and gets to normally open in whole system, always with a whole transfer line 14 of low discharge gas flow purging.This purging air-flow prevents plugging except guaranteeing, the interior bed material of warehouse 1 discharged to pipeline in the interior stress-relief process of warehouse 1 in the time of can also carrying stopping transportation to supply gas.By operating mode, observe and grope again, the pressure preset value in the time of can also suitably improving stopping transportation and supply gas, reduce the defeated coal time, reduces should transfer to sweep gas by the part coal dust that conveying gas is carried complete transportation work within the time period of coalingging in the time.In the time of energy-conservation, accelerated again production efficiency.It is the light plugging phenomenon of automatically eliminating under special operation condition that scavenging pipeline also has the purposes of a maximum.Through knowhow being groped to discovery, same powder to air ratio, conveying gas are more prone to occur coal dust blocking pipe phenomenon when smaller when flow is larger.Low discharge purges the elimination plugging and also is applied to aborning.When plugging occurs when, stop all air supply sources, pressure descends gradually in storehouse and in pipeline.After reducing to zero, if add a low discharge air-flow, the coal dust of obstruction can slowly be dredged and purge totally, if directly again add again the air-flow of a large flow, coal dust still can be forced to compress blocking pipe.Given this, existing cone pump, except increasing control system, has also been done to larger change to system program.Added the multistage pressure protection, the first order is the self-regulation performance of pressure-modulation valve 25, and press because special operation condition continues to rise in storehouse, and pressure-modulation valve 25 is the output complete shut-down automatically; For the Pipeline transport valve 12 of conveying gas flow maximum, close valve point as second stage pressure; Three-level protective is that fluidisation gulp valve 21 closes automatically; Level Four is sweep gas, if sweep gas is stopped the setting value of rear pressure drop to blow down valve 17, blow down valve 17 can be opened again automatically, and other valves are as the same.After sweep gas is stopped, because making pressure, possible leakage gas rises to again when purging the Pyatyi alarm set point of definite value close to, the system outputting alarm, and automatically switch to manually the prompting manual intervention.Unless pursue too high powder to air ratio, generally the plugging alarm condition can not occur in Pyatyi pressure protect.
The manual intervention of system mainly refers to on-site manual block clearing operation, and it comprises following facility: manual block clearing pipeline 18, and on manual block clearing valve 19.After the plugging situation occurs, purge and can't carry out the block clearing operation as the low discharge by above-mentioned, or plugging back cabin body 1 internal pressure do not descend continually and steadily, or open the rear release of blow off valve 6 and purge again still invalidly, can consider to start manual block clearing operation.During operation, operating personal only need be opened the manual block clearing valve 19 at scene, open again sweep gas or conveying gas, the coal mill coal spout that connects close together because of the pipeline after manual block clearing valve 19, manually during block clearing and open the grinding machine Powder discharging fan, now negative pressure is larger in pipeline, and distance is nearer again, so the coal dust manually stopped up during block clearing is easier to be purged in grinding machine.But it is invalid that manual unimpeded in use occurred in existing cone pump, transfer line segmentation flange disassembling bolts need be unloaded to the mode of operation that pipeline carries out block clearing, its science practicality of the present utility model of having given counterevidence.
Compared with prior art, the novel defeated coal cone pump of the utility model outlet anti-clogging has following advantage:
(1) increased a slice choked flow web plate 28, thereby made conveying gas and coal dust that the possibility of the mixing adjusted be arranged, can reach best lower coal speed, and prevent plugging;
(2) lower fluidisation pipe 26 draws short tube 29 to choked flow web plate 28 upper surfaces, has increased fluidisation, prevents that choked flow web plate 28 bore portions from stopping up;
(3) increased a pressure-modulation valve 25, pressure-modulation valve 25 can be controlled the interior flow of aerating air of warehouse 1, thereby it is controlled to reach lower coal amount, and the dynamic adjustments powder to air ratio, also can adjust parameter according to field working conditions, and alerting ability is good;
(4) on transfer line 14, increase by a road scavenging pipeline 16, can constantly to transfer line 14, carry out gas flow purging, further prevent plugging;
(5) in transfer line 14 initial end, increase outlet shutoff valve 15, guaranteed continuous data, and also can prevent from carrying the plugging at initial stage to occur.
The technical scope of this utility model is not limited to the content on specification sheets, must determine its technical scope according to the claim scope.
Claims (3)
1. one kind exports the novel defeated coal cone pump of anti-clogging, it is characterized in that: comprise warehouse, Pulverized Coal Bin, blending box, the pipeline of coalingging, the pressurising pipeline, admission line, transfer line, scavenging pipeline, the tonifying Qi pipeline, the fluidisation of coalingging pipeline and bleeder line, described warehouse top is communicated with at the bottom of Pulverized Coal Bin by the pipeline of coalingging, Pulverized Coal Bin tapering and the fluidisation pipeline connection of coalingging, between warehouse and Pulverized Coal Bin, be connected bleeder line, warehouse one side and pressurising pipeline connection, the warehouse bottom is communicated with blending box, between described blending box and warehouse, be provided with the choked flow web plate, blending box and admission line, transfer line is communicated with, described transfer line initial end is provided with the outlet shutoff valve, on transfer line after the outlet shutoff valve, connect scavenging pipeline, described transfer line and tonifying Qi pipeline connection, described tonifying Qi pipeline and pressurising pipeline connection.
2. the novel defeated coal cone pump of outlet anti-clogging as claimed in claim 1, it is characterized in that: described pressurising pipeline comprises the upper pressurising pipe be communicated with the warehouse top and the lower fluidisation pipe be communicated with the blending box of warehouse bottom, the mouth of described lower fluidisation pipe is connected with short tube, described short tube extends to choked flow mesh plate top, is provided with pressure-modulation valve on the pressurising pipeline.
3. the novel defeated coal cone pump of outlet anti-clogging as claimed in claim 1, it is characterized in that: described choked flow web plate is round plate, on round plate, evenly has some mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013203547586U CN203306739U (en) | 2013-06-20 | 2013-06-20 | Novel coal conveying bin pump with output blockage prevention function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013203547586U CN203306739U (en) | 2013-06-20 | 2013-06-20 | Novel coal conveying bin pump with output blockage prevention function |
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| CN203306739U true CN203306739U (en) | 2013-11-27 |
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| CN2013203547586U Expired - Fee Related CN203306739U (en) | 2013-06-20 | 2013-06-20 | Novel coal conveying bin pump with output blockage prevention function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274217A (en) * | 2013-06-20 | 2013-09-04 | 中天钢铁集团有限公司 | Novel coal conveying bunker type pump with blockage-preventing outlet |
| CN110228710A (en) * | 2019-06-19 | 2019-09-13 | 武汉钢铁有限公司 | The efficient transportation system of dedusting ash and anti-clogging control method |
-
2013
- 2013-06-20 CN CN2013203547586U patent/CN203306739U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274217A (en) * | 2013-06-20 | 2013-09-04 | 中天钢铁集团有限公司 | Novel coal conveying bunker type pump with blockage-preventing outlet |
| CN103274217B (en) * | 2013-06-20 | 2016-03-02 | 中天钢铁集团有限公司 | The novel defeated coal cone pump of outlet anti-clogging |
| CN110228710A (en) * | 2019-06-19 | 2019-09-13 | 武汉钢铁有限公司 | The efficient transportation system of dedusting ash and anti-clogging control method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131127 Termination date: 20160620 |
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| CF01 | Termination of patent right due to non-payment of annual fee |