CN210765369U - Blast furnace hydraulic mud gun expansion ring type mud piston - Google Patents
Blast furnace hydraulic mud gun expansion ring type mud piston Download PDFInfo
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- CN210765369U CN210765369U CN201921567005.7U CN201921567005U CN210765369U CN 210765369 U CN210765369 U CN 210765369U CN 201921567005 U CN201921567005 U CN 201921567005U CN 210765369 U CN210765369 U CN 210765369U
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- inclined plane
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Abstract
The utility model discloses a blast furnace hydraulic mud gun expansion ring type mud beating piston, which comprises an expansion ring pressing plate, a front expansion ring, a rear expansion ring, a bushing, a piston base, a fastening bolt and an injection needle tube structure formed by a mud cylinder barrel; the front expansion ring and the rear expansion ring are respectively provided with a notch, are arranged on the bushing in a staggered mode at a certain angle, the expansion ring pressing plate, the bushing and the piston base are fixed together by a fastening bolt and do reciprocating motion in the mud cylinder barrel, and the outer cylindrical surfaces of the two expansion rings are tightly attached to the inner surface of the mud cylinder barrel; the front expansion ring is provided with a first inclined plane, the rear expansion ring is provided with a second inclined plane, and the first inclined plane is matched with the second inclined plane; the bushing is provided with a third inclined plane, the rear expansion ring is provided with a fourth inclined plane, and the third inclined plane is matched with the fourth inclined plane. The utility model discloses avoid leaking mud, solved the difficult problem of taking back a large amount of stemming fish tail power cylinder piston rods when the piston of beating mud backward movement.
Description
Technical Field
The utility model belongs to iron-making blast furnace equipment field especially relates to a blast furnace hydraulic pressure mud big gun expanding ring formula mud piston of beating.
Background
At present, a known hydraulic mud gun mud beating piston structure is formed by embedding a single copper ring on a bushing, the fit clearance between the outer diameter of the mud beating piston and the inner diameter of a hydraulic mud gun mud cylinder barrel is 0.1mm, the mud beating piston does reciprocating motion in the hydraulic mud gun mud cylinder barrel, the hydraulic mud gun mud cylinder barrel works in a high-temperature area for a long time and is often cooled by water, and the hydraulic mud gun mud cylinder barrel can generate small deformation and sometimes generates a contact friction phenomenon in a cold-hot alternative mode. Under long-term wearing and tearing, cause the increase of beating mud piston and hydraulic pressure mud gun mud cylinder inner wall clearance, along with the continuous increase in clearance, form hydraulic pressure mud gun and leak mud, when hydraulic pressure mud gun stifled iron mouthful, the stemming spills from beating mud piston external diameter and hydraulic pressure mud gun mud cylinder internal diameter gap. The mud leakage amount is continuously increased, when the outer diameter of the mud beating piston and the inner diameter of the mud cylinder of the hydraulic mud gun are matched with each other in a clearance manner, the mud leakage amount is increased, the mud beating amount of the taphole is reduced, the depth of the taphole is reduced, even the taphole is not blocked, and the normal production of the blast furnace is seriously influenced.
In addition, the hydraulic mud gun mud-striking piston bears lateral pressure in the reciprocating process due to the fact that the self-gravity of the mud-striking piston and the piston rod of the hydraulic mud gun power cylinder is overcome. The lower part of the mud beating piston forms contact friction with the hydraulic mud gun mud cylinder, so that the lower part of the mud beating piston is abraded, and the upper gap of the mud beating piston is increased to leak mud. The mud amount of the taphole is reduced, the taphole is shallow for long-term operation, and the slag iron in the hearth erodes the cooling wall of the taphole area, so that the taphole burning-through accident is easy to happen.
In addition, the mud beating piston of the hydraulic mud gun does reciprocating motion in the mud cylinder, the whole circumference of the mud beating piston is abraded, and sometimes the mud beating piston is also blocked. Once the situation occurs, the high-temperature molten iron continues to flow outwards, and the whole hydraulic mud gun and surrounding equipment are burnt.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a blast furnace hydraulic pressure mud big gun expands ring formula and beats mud piston is provided to hydraulic pressure mud big gun leaks mud among the solution prior art, causes the iron notch to beat mud volume and reduces, blocks up even and does not go up the iron notch difficult problem.
The utility model discloses a realize like this:
a blast furnace hydraulic mud gun expansion ring type mud beating piston comprises an injection needle tube structure formed by an expansion ring pressing plate, a front expansion ring, a rear expansion ring, a bushing, a piston base, a fastening bolt and a mud cylinder barrel; the front expansion ring and the rear expansion ring are respectively provided with a notch, are arranged on the bushing in a staggered mode at a certain angle, the expansion ring pressing plate, the bushing and the piston base are fixed together by a fastening bolt and do reciprocating motion in the mud cylinder barrel, and the outer cylindrical surfaces of the two expansion rings are tightly attached to the inner surface of the mud cylinder barrel; the front expansion ring is provided with a first inclined plane, the rear expansion ring is provided with a second inclined plane, and the first inclined plane is matched with the second inclined plane; the bushing is provided with a third inclined plane, the rear expansion ring is provided with a fourth inclined plane, and the third inclined plane is matched with the fourth inclined plane.
The inclined plane included angles of the first inclined plane and the second inclined plane are 150 degrees, the inclined plane included angles of the third inclined plane and the fourth inclined plane are 120 degrees, when the outer cylindrical surface of the expansion ring is abraded, the two expansion rings are rapidly expanded under the thrust action generated by the pressure of a stemming medium when the hydraulic mud gun blocks an iron notch, and the gap between the outer cylindrical surface of the expansion ring and the mud cylinder barrel is automatically compensated after the outer cylindrical surface of the expansion ring is abraded.
The width of the notch is 1.5mm, and the notches are arranged on the bushing in a staggered manner by 180 degrees.
The material of the expansion ring is made of Cu-Ni-Mg-Al-Si alloy.
Compared with the prior art, the utility model, beneficial effect lies in:
1. the two expansion rings are made of a new Cu-Ni-Mg-Al-Si alloy material, brass has strong wear resistance and self-lubricating property superior to any metal, and the biggest advantage is that the inner surface of the mud cylinder barrel is not strained, the surface quality of a product is obviously improved, the processing technology is simple and convenient, and the surface can be processed into a mirror surface; ni has the characteristics of good corrosion resistance, welding performance and processing performance, and high-temperature resistance; mg is one of the lightest structural metal materials, and the magnesium alloy has the advantages of light weight, high strength, good vibration damping performance, good thermal fatigue performance, difficult aging and good thermal conductivity; the Al is light in weight and corrosion-resistant, and the aluminum is a good thermal conductor and has good heat dissipation performance; si is used for improving the strength of the alloy; and carrying out heat treatment after the alloy is processed.
2. Innovation has been carried out the mud piston in the design, adopt two piston structures of piston ring, preceding swell ring chamfer 150 °, back swell ring chamfer 120, after the outer face wearing and tearing of swell ring, when hydraulic pressure mud gun stifled iron mouthful, two swell rings are under the thrust effect that stemming pressure produced, because preceding swell ring friction angle is greater than back swell ring friction angle, so preceding swell ring expands rapidly and seals the stemming, the swell ring expands immediately afterwards, play supplementary sealed and guide effect, the clearance that produces with a mud cylinder inner wall after two swell ring outer face wearing and tearing of automatic compensation.
3. The mud leakage is avoided, and the problem that a large amount of mud is brought back to scratch the piston rod of the power oil cylinder when the mud pumping piston moves backwards is solved.
4. The structure works under the conditions of high temperature (above 300 ℃), high pressure and high stress, has low thermal expansion coefficient and good dimensional stability, and is not easy to deform.
5. The double-piston-ring type piston structure is adopted, the wear compensation function is achieved, the service life is prolonged by 1.5 times compared with the original service life, the replacement cost of the piston body is reduced from 4.2 ten thousand yuan per set to 2800 yuan per set, and the cost is reduced by over 80%.
6. Two incision installation angle of preceding swell ring and back swell ring are 180, and the incision of two swell rings is each other shelters from, and sealing performance is good, has solved the difficult problem that the mud was leaked to the piston of beating mud, and thrust improves to 6000kN by 4500kN simultaneously.
7. The structure can radially expand and contract in the reciprocating motion process, avoids the contact friction with the surface of the inner cylinder of the mud cylinder of the hydraulic mud gun, and solves the problem of 'blocking'.
Drawings
Fig. 1 is a schematic view of an apparatus structure assembly provided by an embodiment of the present invention;
FIG. 2 is an enlarged view of the piston structure;
FIG. 3 is a detail view of the front expander;
FIG. 4 is a detail view of the rear expander;
FIG. 5 is a force diagram of the mud piston during operation;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the blast furnace hydraulic mud gun expansion ring type mud-driving piston comprises an injection needle tube structure formed by an expansion ring pressing plate 1, a front expansion ring 2, a rear expansion ring 3, a bushing 4, a piston base 5, a fastening bolt 6 and a mud cylinder barrel 7. The front expansion ring 2 and the rear expansion ring 3 are respectively provided with 1.5mm notches 8 which are staggered by 180 degrees and are arranged on the lining 4, the width of the notches is not limited to 1.5mm, and the notches can be adjusted according to actual conditions, such as 1.2-1.6 mm; the staggered angle is not limited to 180 degrees, and can be selected from 120-180 degrees; the expansion ring pressing plate 1, the bushing 4 and the piston base 5 are fixed together by the fastening bolt 6 and reciprocate in the mud cylinder 7, and the outer cylindrical surfaces of the two expansion rings are tightly attached to the inner surface of the mud cylinder 7. The chamfer angle of the front expansion ring 2 (namely the included angle between the first inclined plane 21 or the included angle between the second inclined plane 21) is 150 degrees, the chamfer angle of the rear expansion ring 3 (namely the included angle between the fourth inclined plane 32 or the included angle between the third inclined plane 41) is 120 degrees, when the outer cylindrical surface of the expansion ring is worn, and when the hydraulic mud gun blocks an iron notch, the two expansion rings are under the thrust action generated by the pressure of the stemming, because the friction angle of the front expansion ring is greater than the friction angle of the rear expansion ring, the front expansion ring is rapidly expanded to seal the stemming, and the rear expansion ring is expanded to play a role in auxiliary sealing and guiding, so that the gap between the outer cylindrical surface of the two expansion rings and the inner wall of the mud cylinder is.
The expansion ring is made of Cu-Ni-Mg-Al-Si alloy, is subjected to heat treatment after processing, has self-lubricating property, corrosion resistance, good heat dissipation performance and smooth relative motion, eliminates the phenomenon of 'locking' caused by thermal deformation of the mud cylinder, and prolongs the service life by more than 1.5 times. The structure can avoid mud leakage of the hydraulic mud gun, so that the mud beating amount of the iron notch is reduced, and even severe accidents of the iron notch can not be blocked.
When the device is used, the expansion ring type mud beating piston is integrally arranged on the piston rod of the power cylinder, and the piston rod of the power cylinder of the hydraulic mud gun reciprocates in the mud cylinder barrel 7 through the expansion of the piston rod to inject the mud gun into a taphole of the blast furnace.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. The utility model provides a blast furnace hydraulic pressure mud big gun expansion ring formula mud piston of beating which characterized in that: the injection needle tube structure is formed by an expansion ring pressing plate, a front expansion ring, a rear expansion ring, a lining, a piston base, a fastening bolt and a mud cylinder barrel; the front expansion ring and the rear expansion ring are respectively provided with a notch, are arranged on the bushing in a staggered mode at a certain angle, the expansion ring pressing plate, the bushing and the piston base are fixed together by a fastening bolt and do reciprocating motion in the mud cylinder barrel, and the outer cylindrical surfaces of the two expansion rings are tightly attached to the inner surface of the mud cylinder barrel; the front expansion ring is provided with a first inclined plane, the rear expansion ring is provided with a second inclined plane, and the first inclined plane is matched with the second inclined plane; the bushing is provided with a third inclined plane, the rear expansion ring is provided with a fourth inclined plane, and the third inclined plane is matched with the fourth inclined plane.
2. The blast furnace hydraulic mud gun expansion ring type mud piston of claim 1, which is characterized in that: the included angles of the first inclined plane and the second inclined plane are both 150 degrees, and the included angles of the third inclined plane and the fourth inclined plane are both 120 degrees.
3. The blast furnace hydraulic mud gun expansion ring type mud piston of claim 1, which is characterized in that: the width of the notch is 1.5mm, and the notches are arranged on the bushing in a staggered manner by 180 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921567005.7U CN210765369U (en) | 2019-09-20 | 2019-09-20 | Blast furnace hydraulic mud gun expansion ring type mud piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921567005.7U CN210765369U (en) | 2019-09-20 | 2019-09-20 | Blast furnace hydraulic mud gun expansion ring type mud piston |
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| Publication Number | Publication Date |
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| CN210765369U true CN210765369U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921567005.7U Active CN210765369U (en) | 2019-09-20 | 2019-09-20 | Blast furnace hydraulic mud gun expansion ring type mud piston |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112609031A (en) * | 2020-12-09 | 2021-04-06 | 本钢板材股份有限公司 | Hydraulic clay gun |
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2019
- 2019-09-20 CN CN201921567005.7U patent/CN210765369U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112609031A (en) * | 2020-12-09 | 2021-04-06 | 本钢板材股份有限公司 | Hydraulic clay gun |
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