CN108424776B - Driving device of multi-hammer movable tamping machine - Google Patents
Driving device of multi-hammer movable tamping machine Download PDFInfo
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- CN108424776B CN108424776B CN201810411112.4A CN201810411112A CN108424776B CN 108424776 B CN108424776 B CN 108424776B CN 201810411112 A CN201810411112 A CN 201810411112A CN 108424776 B CN108424776 B CN 108424776B
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- connecting plate
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- 230000002457 bidirectional effect Effects 0.000 claims description 18
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000003245 coal Substances 0.000 description 14
- 238000004939 coking Methods 0.000 description 12
- 238000012423 maintenance Methods 0.000 description 11
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- 239000000571 coke Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 3
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 3
- 235000011130 ammonium sulphate Nutrition 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B45/00—Other details
- C10B45/02—Devices for producing compact unified coal charges outside the oven
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a driving device of a multi-hammer movable type tamper, relates to the technical field of tamper equipment, and solves the problems that in the prior art, when a sector gear is damaged, the replacement is inconvenient, the service life of a rack cylinder is short, resource waste is caused by frequent replacement, and the time and the labor are wasted, so that the yield is influenced. The technical scheme adopted is as follows: the two-way sector gear and the one-way sector gear are of split type structures, the two-way sector gear comprises an open shaft hub I and an open shaft hub II, a connecting plate I and a connecting plate II are arranged on the outer cylindrical walls of the open shaft hub I and the open shaft hub II, and the connecting plate I and the connecting plate II are fixedly connected through bolts; the unidirectional sector gear comprises an open shaft hub III and an open shaft hub IV, connecting plates III and IV are arranged on the outer cylindrical walls of the open shaft hub III and the open shaft hub IV, and the connecting plates III and IV are fixedly connected through bolts; racks are milled on the outer cylinder wall of the piston rod of the rack cylinder, and the racks are symmetrically distributed on the outer cylinder wall of the piston rod.
Description
Technical Field
The invention relates to the technical field of tamping machine equipment, in particular to a driving device of a multi-hammer movable type tamping machine.
Background
The tamping coking in coking plant is to tamp the coal into coal cake slightly smaller than the coking chamber before charging into the furnace, and then pushing into the coking chamber for coking. The bulk density of the tamped coal cake can be improved from 700kg/m to 750kg/m of the original bulk coal to 950kg/m to 1150kg/m of the original bulk coal. Production practice proves that the tamping coking is compared with the conventional top-loading coking. The coke strength is obviously improved when the charging coal proportion is the same; when the coke strength is the same, the tamping coking can reduce the blending amount of main coking coal and fat coal in the charging coal and increase the blending amount of gas coal. Therefore, the tamping coking technology can reasonably utilize coal resources, obviously reduce the coking and coal blending cost and generate obvious economic and social benefits. Therefore, the tamper equipment integrity is ensured, the equipment maintenance efficiency is improved, and the equipment operation efficiency is ensured.
The tamper service efficiency includes the tamper's operational reliability and efficiency (tamping work performed per unit time). During operation of the stamp-charged coke oven kit, the time spent stamping the coal cake during each cycle is approximately 40% of the total time spent operating the apparatus. If the tamper frequently fails or the maintenance time is too long, the coke oven productivity will be seriously affected.
The tamping machine has more varieties, such as a multi-hammer movable tamping machine which is conventionally used, and the working principle is that the tamping hammer lifting action is mechanical transmission type, the power of a motor is transmitted to an eccentric wheel through a speed reducer, and the tamping hammer is lifted to a fixed height and falls down freely through the mutual clamping friction action of friction plates fixed on two sides of the I-steel type tamping hammer and rotating wheels, so that the tamping effect of tamping coal cakes is realized. The driving shaft and the driven shaft of the traditional drum rammer are both provided with sector gears, the sector gears are easy to wear parts, the sector gears need to be replaced when a certain number of teeth are missing or the gears are damaged due to sudden faults, and the sector gear hub of the traditional design is totally enclosed by forging, is not easy to detach when being replaced after being installed, needs to be detached from one end of the shaft one by one according to the installation sequence, is installed in place after the gears are replaced, and has long maintenance time and can not be produced, thereby not only consuming time and labor, but also affecting the yield; one end of the sector gear is also matched with a rack cylinder for transmission, a rack is milled on one surface of the upper part of a piston rod of the traditional rack cylinder, after a certain period of use, the phenomenon of tooth falling is easy to occur due to abrasion or continuous meshing collision between two teeth, when the teeth do not reach the required consumption, the rack cylinder must be replaced, waste is caused, and production cannot be performed and yield loss is caused when the cylinder is replaced; therefore, how to simply and quickly replace the easily worn sector gear and improve the service life of the rack cylinder, thereby effectively shortening the maintenance time, reducing the manufacturing cost and improving the productivity of the coke oven is a technical problem which is urgently needed to be solved by the technicians in the field.
Disclosure of Invention
The technical task of the invention is to provide the driving device of the multi-hammer movable tamping machine aiming at the defects, and the driving device can solve the problems that the replacement is inconvenient when the sector gear is damaged, the service life of a rack cylinder is short, the resource waste is caused by frequent replacement, and the yield is influenced by time and labor.
The technical scheme adopted for solving the technical problems is as follows:
the driving device of the multi-hammer movable tamper comprises a driving shaft, a driven shaft, eccentric wheels, sector gears and a rack cylinder, wherein three groups of eccentric wheels are respectively arranged on the driving shaft and the driven shaft, and the eccentric wheels of the three groups are distributed towards 120 degrees; the eccentric wheel is provided with a sector gear, the sector gear comprises a bidirectional sector gear and a unidirectional sector gear, the sector gear positioned on the driving shaft is the bidirectional sector gear, and the sector gear positioned on the driven shaft is the unidirectional sector gear; the rack cylinder comprises a piston rod, a cylinder sleeve and a piston, a rack is milled on the outer wall of the piston rod, and one end of the bidirectional sector gear is meshed with the rack on the rack cylinder for transmission; the two-way sector gear and the one-way sector gear are of split type structures, the two-way sector gear comprises an open shaft hub I and an open shaft hub II, a connecting plate I and a connecting plate II are arranged on the outer cylindrical walls of the open shaft hub I and the open shaft hub II, and the connecting plate I and the connecting plate II are fixedly connected through a plurality of bolts; the unidirectional sector gear comprises an open shaft hub III and an open shaft hub IV, wherein connecting plates III and IV are respectively arranged on the outer cylindrical walls of the open shaft hub III and the open shaft hub IV, and the connecting plates III and IV are fixedly connected through a plurality of bolts; a plurality of racks are milled on the outer cylinder wall of a piston rod of the rack cylinder, and the racks are symmetrically distributed on the outer cylinder wall of the piston rod.
The cross sections of the open axle hubs I, II, III and IV are semicircular structures, and the connecting plates I, II, III and IV are respectively integrated with the open axle hubs I, II, III and IV.
A plurality of taper pins are arranged between the connecting plate I and the connecting plate II and between the connecting plate III and the connecting plate IV, and the connecting plate I and the connecting plate II are fixedly connected through the taper pins respectively, and the connecting plate III and the connecting plate IV are fixedly connected.
The taper pin is a taper pin of 1:10 phi 8 or a taper pin of 1:50 phi 10.
Both the bidirectional sector gear and the unidirectional sector gear are made of 40Cr alloy steel materials.
The number of racks on the piston rod is 2 or 4, and the racks are arranged on the outer wall of the piston rod in a pairwise symmetrical way.
The diameter of the piston rod is 120-160 mm, and the tooth face width of the rack is 90-100 mm.
The bolts are 8.8-grade M16 socket head cap bolts.
Compared with the prior art, the driving device of the multi-hammer movable tamper has the following beneficial effects:
1. the bidirectional sector gear and the unidirectional sector gear are of split type structures, have the advantages of convenience in replacement and easiness in disassembly, and can be disassembled and restored to production after only 1 hour; the defects that the traditional sector gear is required to be dismounted and lifted to a main transmission shaft or a driven shaft and the sector gear is required to be sequentially dismounted and mounted from one end of a driving shaft or a driven shaft are avoided, and the maintenance time and the labor intensity of workers are reduced;
2. the conical pins are arranged between the connecting plates I and II and between the connecting plate III and the connecting plate IV, so that the stability of sector gear connection can be improved, loosening is not easy to occur, and the connecting plate has the advantage of firm fixation;
3. the bidirectional sector gear and the unidirectional sector gear are both made of 40Cr alloy steel materials, and the bidirectional sector gear and the unidirectional sector gear which are made of the 40Cr alloy steel materials are modulated and surface quenched, so that the strength, toughness and surface roughness of the bidirectional sector gear and the unidirectional sector gear are improved, and the failure rate and maintenance times of equipment can be effectively reduced;
4. the outer cylinder wall of the piston rod is milled with a plurality of racks which are symmetrically distributed on the outer cylinder wall of the piston rod, so that the service time of the cylinder is prolonged, the service life of the cylinder is prolonged, and the use cost of the cylinder is saved on the premise of meeting the use requirement;
5. the damage time of each sector gear is different in the use process, the replacement frequency of the average sector gear is 1 time/2 month, 6 times of gear replacement are needed each year, the traditional replacement time of the sector gear is about 10 hours, 60 hours are needed all year round, after the sector gear is replaced by a split type sector gear, the replacement time is about 1 hour, 9 hours can be saved each time, and 54 hours can be saved each year;
only one rack is milled on a piston rod of a traditional rack cylinder, the service cycle of the rack is 3 months, the rack of each cylinder is replaced once for 1.5 hours, the rack is replaced 4 times each year on average, the rack is used 6 times, and the racks of the three racks are replaced for 18 hours all year; the piston rod on the rack cylinder mills 4 racks, if the rack cylinder is replaced for no other reasons, each rack cylinder can be used for 1 year, and the three rack cylinders save about 13 hours each year;
the traditional annual maintenance takes 78 hours, but the current annual maintenance only takes 10 hours, the annual maintenance time is saved by 68 hours, and the maintenance efficiency is greatly improved, so that the production efficiency is improved, and the production efficiency is ensured;
6. the maintenance time is reduced, so that the income of enterprises can be effectively increased; 1102 tons of coke can be produced in a reduced service time; 38.69 tons of gas can be generated in the coking process, 13 tons of crude benzene, 51 tons of tar and 12 tons of ammonium sulfate can be increased in the gas purifying process;
yield increase efficiency accounting:
(1) the selling rate of the coal gas per cubic meter is 0.85 yuan, the yield is increased by 38.69 ten thousand meters, and the yield is increased by 32.9 ten thousand yuan;
(2) each ton of coke is sold out for 2100 yuan, and the yield is increased by 231.4 ten thousand yuan for 1102 tons of coke;
(3) each ton of crude benzene is sold for 5700 yuan, and the yield is increased by 7.4 ten thousand yuan for 13 tons of crude benzene;
(4) each ton of ammonium sulfate is sold for 560 yuan, and the yield is increased by 12 tons of ammonium sulfate by 0.7 ten thousand yuan;
(5) 4700 yuan for each ton of tar, and increasing the yield by 24.0 ten thousand yuan for 51 tons of tar;
therefore, by adopting the technical scheme, the economic benefit 296.4 ten thousand yuan can be directly created for enterprises each year.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a drive mechanism for a tamper of a multi-hammer mobile tamper;
FIG. 2 is a schematic view of a two-way sector gear;
FIG. 3 is a schematic view of a one-way sector gear;
FIG. 4 is a schematic view of the structure of the rack cylinder;
FIG. 5 is a schematic view of the structure of FIG. 4 in the direction A;
fig. 6 is a schematic view of the B-direction structure of fig. 4.
In the figure: 1. the driving shaft, 2, the driven shaft, 3, the eccentric wheel, 4, the rack cylinder, 5, the bidirectional sector gear, 6, the unidirectional sector gear, 7, the piston rod, 8, the cylinder sleeve, 9, the piston, 10, the rack, 11, the open shaft hubs I, 12, the open shaft hubs II, 13, the connecting plates I, 14, the connecting plates II, 15, the inner hexagon bolts, 16, the open shaft hubs III, 17, the open shaft hubs IV, 18, the connecting plates III, 19, the connecting plates IV, 20 and the taper pins.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
Example 1:
the invention relates to a driving device of a multi-hammer movable tamper, which comprises a driving shaft 1, a driven shaft 2, eccentric wheels 3, sector gears and a rack cylinder 4, wherein three groups of eccentric wheels 3 are respectively arranged on the driving shaft 1 and the driven shaft 2, and the three groups of eccentric wheels 3 are distributed towards 120 degrees in an eccentric way; the eccentric wheel 3 is provided with a sector gear, the sector gear comprises a bidirectional sector gear 5 and a unidirectional sector gear 6, the bidirectional sector gear 5 and the unidirectional sector gear 6 are both made of 40Cr alloy steel materials, the sector gear positioned on the driving shaft 1 is the bidirectional sector gear 5, and the sector gear positioned on the driven shaft 2 is the unidirectional sector gear 6; the rack cylinder 4 comprises a piston rod 7, a cylinder sleeve 8 and a piston 9, a rack 10 is milled on the outer wall of the piston rod 7, and one end of the bidirectional sector gear 5 is meshed with the rack 10 on the rack cylinder 4 for transmission; the bidirectional sector gear 5 and the unidirectional sector gear 6 are of split type structures, the bidirectional sector gear 5 comprises an open shaft hub I11 and an open shaft hub II 12, a connecting plate I13 and a connecting plate II 14 are arranged on the outer cylindrical walls of the open shaft hub I11 and the open shaft hub II 12, and the connecting plate I13 and the connecting plate II 14 are fixedly connected through 4 8.8-stage and M16 inner hexagon bolts 15; the unidirectional sector gear 6 comprises an open shaft hub III 16 and an open shaft hub IV 17, connecting plates III 18 and IV 19 are arranged on the outer cylindrical walls of the open shaft hub III 16 and the open shaft hub IV 17, and the connecting plates III 18 and IV 19 are fixedly connected through 4 8.8-level M16 inner hexagon bolts 15; the cross sections of the open shaft hubs I11, II 12, III 16 and IV 17 are semicircular structures, and the connecting plates I13, II 14, III 18 and IV 19 are respectively integrated with the open shaft hubs I11, II 12, III 16 and IV 17; 2 taper pins 20 with the diameter of 1:10 phi 8 are arranged between the connecting plate I13 and the connecting plate II 14 and between the connecting plate III 18 and the connecting plate IV 17, the connecting plate I13 and the connecting plate II 14 are fixedly connected through the taper pins 20, and the connecting plate III 18 and the connecting plate IV 19 are fixedly connected. 4 racks 10 are milled on the outer cylindrical wall of the piston rod 7 of the rack cylinder 4, the diameter of the piston rod 7 is 140mm, and the 4 racks 10 with the tooth face width of 95mm are symmetrically distributed on the outer cylindrical wall of the piston rod 7.
When the sector gear is broken or the tooth surface is worn and invalid during the use process, and the sector gear is required to be replaced in time when the sector gear cannot work normally, and when the sector gear is disassembled, a worker only needs to disassemble the 8.8-stage and M16 inner hexagon bolts 15 and the taper pins 20 with the diameter of 1:10 phi 8 from the sector gear, so that the split type sector gear can be disassembled from the driving shaft 1 or the driven shaft 2; after the disassembly is finished, the split type sector gear to be replaced is fixed on the driving shaft 1 or the driven shaft 2 through the 8.8-stage and M16 inner hexagon bolts 15 and the 1:10 phi 8 taper pins 20, so that the installation of the sector gear is realized.
In the use process, when one of the racks 10 on the piston rod 7 of the rack cylinder 4 is worn out and fails, and the position of the piston rod 7 can be changed to drive the milled rack 10 on the piston rod 7 in a matched mode with the sector gear when the use requirement is not met.
The present invention can be easily implemented by those skilled in the art through the above specific embodiments. It should be understood that the invention is not limited to the 1 particular embodiment described above. Based on the disclosed embodiments, a person skilled in the art may combine different technical features at will, so as to implement different technical solutions.
Other than the technical features described in the specification, all are known to those skilled in the art.
Claims (6)
1. The driving device of the multi-hammer movable tamper comprises a driving shaft, a driven shaft, eccentric wheels, sector gears and a rack cylinder, wherein three groups of eccentric wheels are respectively arranged on the driving shaft and the driven shaft, and the eccentric wheels of the three groups are distributed towards 120 degrees; the eccentric wheel is provided with a sector gear, the sector gear comprises a bidirectional sector gear and a unidirectional sector gear, the sector gear positioned on the driving shaft is the bidirectional sector gear, and the sector gear positioned on the driven shaft is the unidirectional sector gear; the rack cylinder comprises a piston rod, a cylinder sleeve and a piston, a rack is milled on the outer wall of the piston rod, and one end of the bidirectional sector gear is meshed with the rack on the rack cylinder for transmission; the two-way fan-shaped gear is characterized in that the two-way fan-shaped gear and the one-way fan-shaped gear are of split type structures, the two-way fan-shaped gear comprises an open shaft hub I and an open shaft hub II, a connecting plate I is arranged on the outer cylindrical wall of the open shaft hub I, a connecting plate II is arranged on the outer cylindrical wall of the open shaft hub II, and the connecting plate I and the connecting plate II are fixedly connected through a plurality of bolts; the unidirectional sector gear comprises an open shaft hub III and an open shaft hub IV, a connecting plate III is arranged on the outer cylindrical wall of the open shaft hub III, a connecting plate IV is arranged on the outer cylindrical wall of the open shaft hub IV, and the connecting plate III and the connecting plate IV are fixedly connected through a plurality of bolts; a plurality of racks are milled on the outer cylinder wall of the piston rod of the rack cylinder, and the racks are symmetrically distributed on the outer cylinder wall of the piston rod;
the cross sections of the open type shaft hub I, the open type shaft hub II, the open type shaft hub III and the open type shaft hub IV are semicircular structures, and the connecting plate I, the connecting plate II, the connecting plate III and the connecting plate IV are respectively integrated with the open type shaft hub I, the open type shaft hub II, the open type shaft hub III and the open type shaft hub IV;
a plurality of taper pins are arranged between the connecting plate I and the connecting plate II and between the connecting plate III and the connecting plate IV, and the connecting plate I and the connecting plate II are fixedly connected through the taper pins respectively, and the connecting plate III and the connecting plate IV are fixedly connected.
2. A driving device for a multi-hammer mobile tamper according to claim 1, characterized in that the taper pin is a 1:10 phi 8 taper pin or a 1:50 phi 10 taper pin.
3. A driving device for a multi-hammer mobile tamper according to claim 1, wherein the bi-directional sector gear and the uni-directional sector gear are each made of a 40Cr alloy steel material.
4. The driving device for a multi-hammer movable tamper according to claim 1, wherein the number of racks on the piston rod is 2 or 4, and the racks are symmetrically arranged on the outer wall of the piston rod.
5. The driving apparatus for a multi-hammer mobile tamper according to claim 4, wherein the piston rod has a diameter of 120 to 160mm and the rack has a face width of 90 to 100mm.
6. The driving apparatus for a multi-hammer mobile tamper according to claim 1, wherein the bolts are 8.8-stage, M16 socket head cap bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810411112.4A CN108424776B (en) | 2018-05-02 | 2018-05-02 | Driving device of multi-hammer movable tamping machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810411112.4A CN108424776B (en) | 2018-05-02 | 2018-05-02 | Driving device of multi-hammer movable tamping machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108424776A CN108424776A (en) | 2018-08-21 |
| CN108424776B true CN108424776B (en) | 2024-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810411112.4A Active CN108424776B (en) | 2018-05-02 | 2018-05-02 | Driving device of multi-hammer movable tamping machine |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB268802A (en) * | 1926-03-31 | 1928-07-02 | Oliver George Simmons | Improvements in method and apparatus for generating gear teeth |
| CN2841708Y (en) * | 2005-08-31 | 2006-11-29 | 中原工学院 | Gear sector and rack structure for realizing needle plate linear motion of double crank needling mechanism |
| CN101967384A (en) * | 2010-11-01 | 2011-02-09 | 大连华宇冶金设备有限公司 | Laminated spring hammer tamper |
| CN203652588U (en) * | 2014-01-08 | 2014-06-18 | 宜都市恒运机电设备有限责任公司 | Novel head pulley component for bucket chain conveyor |
| CN204961996U (en) * | 2015-09-18 | 2016-01-13 | 上虞大兴锅炉容器有限公司 | Autoclave press safety interlock |
| CN208136149U (en) * | 2018-05-02 | 2018-11-23 | 山东恒信集团焦化有限公司 | A kind of driving device for hammering mobile tamping tool into shape more |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011008892A1 (en) * | 2009-07-14 | 2011-01-20 | Intelligent Systems And Controls Contractors | Split sector gear |
-
2018
- 2018-05-02 CN CN201810411112.4A patent/CN108424776B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB268802A (en) * | 1926-03-31 | 1928-07-02 | Oliver George Simmons | Improvements in method and apparatus for generating gear teeth |
| CN2841708Y (en) * | 2005-08-31 | 2006-11-29 | 中原工学院 | Gear sector and rack structure for realizing needle plate linear motion of double crank needling mechanism |
| CN101967384A (en) * | 2010-11-01 | 2011-02-09 | 大连华宇冶金设备有限公司 | Laminated spring hammer tamper |
| CN203652588U (en) * | 2014-01-08 | 2014-06-18 | 宜都市恒运机电设备有限责任公司 | Novel head pulley component for bucket chain conveyor |
| CN204961996U (en) * | 2015-09-18 | 2016-01-13 | 上虞大兴锅炉容器有限公司 | Autoclave press safety interlock |
| CN208136149U (en) * | 2018-05-02 | 2018-11-23 | 山东恒信集团焦化有限公司 | A kind of driving device for hammering mobile tamping tool into shape more |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108424776A (en) | 2018-08-21 |
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