CN104896077B - Drainage waterproof structure of tension warp-reducing machine reduction gearbox - Google Patents
Drainage waterproof structure of tension warp-reducing machine reduction gearbox Download PDFInfo
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- CN104896077B CN104896077B CN201510282756.4A CN201510282756A CN104896077B CN 104896077 B CN104896077 B CN 104896077B CN 201510282756 A CN201510282756 A CN 201510282756A CN 104896077 B CN104896077 B CN 104896077B
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- power output
- axle
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- water
- hole
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0402—Cleaning of lubricants, e.g. filters or magnets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0413—Controlled cooling or heating of lubricant; Temperature control therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
- F16H57/0454—Sealings between different partitions of a gearing or to a reservoir
Abstract
The invention relates to a drainage waterproof structure of a tension warp reducer reduction box, wherein a drainage sleeve is arranged between a lower outer sheath and a bearing end cover of the reduction box, a drainage hole is arranged on the inclined inner side surface of the drainage sleeve, so that water liquid entering between the lower outer sheath and a power output shaft can be drained from the drainage hole in time, if an axial water-proof cap is arranged at the bottom of the drainage sleeve, the outer diameter of the water-proof cap is smaller than the inner hole diameter of the drainage sleeve, the top surface of the water-proof cap is higher than the bottom edge of the drainage hole, namely, various defects caused by cooling water entering the reduction box and being mixed with lubricating oil can be prevented more effectively through a labyrinth mechanical sealing structure.
Description
Technical field:
the invention relates to seamless steel tube production equipment, in particular to a stretch reducing machine, and more particularly relates to a reduction gearbox of the stretch reducing machine.
The background technology is as follows:
the tension reducing mill is used for continuously rolling high Wen Huangguan (temperature 920-1050 ℃) sent by punching and rolling pipes, so that the mother pipes with the same specification roll seamless steel pipes with different specifications at different tension speeds and under the hole patterns of a frame.
At present, the steel tube tension reducing mill comprises three groups of roller components and a frame, wherein the roller components are 120 degrees, one group of roller components are in a vertical state, the other two groups of roller components are symmetrically distributed by taking the vertical unit as a symmetrical axis, the three groups of roller components are distributed on the frame in a herringbone or inverted herringbone shape, and the three groups of synchronous rollers are used for carrying out steel biting and enveloping biting reducing rolling on the high Wen Huangguan of the perforated pipe jacking to obtain seamless steel tubes with different specifications. In the reducing rolling process, in order to ensure the dimensional accuracy of the roller and reduce the abrasion and dimensional accuracy change of the roller in a high-temperature softening state, three groups of rollers must be synchronously sprayed with cooling water so as to reduce the temperature of the roller and ensure the dimensional accuracy stability of a rolled steel pipe.
In the steel tube reducing mill, each group of roller components comprises a reduction gearbox 1, a roller rotating and meshing shaft assembly 2 and a telescopic control component 3, the reduction gearbox 1 comprises a reduction gearbox body 11, a power input shaft 12, a transmission gear set 13 and a power output shaft 14, the power input shaft 12 is respectively arranged on the reduction gearbox body 11 through two groups of bearings, the power output shaft 14 is arranged on the reduction gearbox body 11 through two groups of bearings and a bearing end cover 16 with a framework sealing ring 15, the power input shaft 12 drives the power output shaft 14 to rotate through the transmission gear set 13, the power input shaft 12 is driven by a motor, the power output shaft 14 is a hollow shaft, a spline is arranged in an inner hole of an upper section of the power output shaft 14, a spring seat 17 is fixed on the upper end surface of the power output shaft 14, a lower outer jacket 18 is arranged outside the spring seat 17 and is fixed on the bearing end cover 16, the roller rotary meshing shaft assembly 2 is inserted into a spline inner hole of the power output shaft 14 in a matching way, the roller rotary meshing shaft assembly 2 comprises a main reset spring 21, a meshing shaft 22, an upper meshing shaft sleeve 23, an upper sheath 24 and a double-end butting component 25, the main reset spring 21 and the meshing shaft 22 are inserted into the spline inner hole of the power output shaft 14, the upper meshing shaft sleeve 23 is fixedly arranged at the upper end of the meshing shaft 22, the double-end butting component 25 is sleeved into the spline inner hole at the upper end of the upper meshing shaft sleeve 23 through a spline structure, a fine tuning spring 26 and a spring mandrel 27 are arranged between the double-end butting component 25 and the upper meshing shaft sleeve 23, so that micro telescopic adjustment of the double-end butting component 25 relative to the upper meshing shaft sleeve 23 is realized, an upper sheath 24 is fixed on the excircle of the upper meshing shaft sleeve 23, the lower end of the inner hole of the upper sheath 24 is in clearance fit with the excircle of the lower outer sheath 18, a transmission internal spline gear sleeve for driving a roller is arranged on a rack, the upper end of the double-end butting part 25 is matched with a spline hole in the roller through a centering correcting spline structure, so that the two parts are conveniently inserted and meshed in a centering way; the expansion and contraction control member 3 is mounted on the lower end of the engagement shaft 22 through a bearing, and is controlled by a reciprocating linear movement type hydraulic cylinder.
The lubricating oil requirement of the speed reducer lubricating system of the tension reducing mill is extremely high, the requirement of the lubricating oil injected at one time is large, and 60 ten thousand RMB are required for replacing the standard lubricating oil at one time. Because the steel tube tension reducing mill unit must be water-cooled in the actual use process, at present, the replacement period of lubricating oil in the reduction gearbox is only 4 months, the overhaul period of the reduction gearbox is 6 months, and the direct cost of each overhaul is about 80 ten thousand yuan, so the production cost and the maintenance cost are too high, and the applicant finds that the viscosity of the replaced waste oil is very low, the waste oil has malodorous smell, and the capacity of the discharged waste oil is larger than the original injection capacity. The applicant finds that the inner wall of the reduction gearbox, the transmission gear, the transmission shaft, the bearing and other metal parts are severely corroded or corroded through disassembly, and the main reason for generating the defects is that cooling spray water enters the reduction gearbox through serious observation and analysis, meanwhile, no water inflow phenomenon exists in the vertically distributed roller part reduction gearbox, water inflow phenomenon exists in the reduction gearboxes of the two obliquely arranged roller parts at two sides, and the water inflow paths of the obliquely arranged roller part reduction gearbox are found as follows through the analysis of the existing mechanical structure:
the sprayed cooling water flows downwards along the outer surface of the upper sheath 24 after being sprayed onto the upper sheath 24, and a large amount of mist vapor is generated when the cooling water hits the double-end butt joint part 25 with the temperature higher than 100 ℃, and the mist vapor is condensed into liquid at the inner hole side wall of the lower outer sheath 18 through the gap between the upper sheath 24 and the lower outer sheath 18, then enters the gap between the lower outer sheath 18 and the power output shaft 14 and the bearing end cover along the inner hole side wall of the lower outer sheath 18, although the bottom is blocked by the sealing of the framework sealing ring 15 and the bearing end cover 16, during the steel rolling process, particularly the instant when the roller bites steel with the high Wen Huangguan, the roller is acted by the radial force of the single side, so that the reverse side movement deformation is generated between the power output shaft 14 and the framework sealing ring 15, the sealing relationship between the two is broken, and under the condition of higher environmental temperature, the power output shaft 14 rotates at a higher linear speed (2 m/S), the skeleton sealing ring 15 can generate unilateral abrasion to the power output shaft 14, so that the original sealing matching relation between the skeleton sealing ring 15 and the power output shaft 14 is damaged, water solution stored between the lower outer sheath 18 and the power output shaft 14 permeates into the inner cavity of the reduction gearbox 11, cooling water and lubricating oil are mixed, the lubricating oil continuously generates foam under the high-speed stirring of the rotating gear, the oil-water mixture is continuously fermented at a high temperature, the deterioration is accelerated, the original design lubrication system in the reduction gearbox 1 is damaged, the lubricating oil is polluted, cooling water enters the gearbox, the viscosity of the lubricating oil in the reduction gearbox 1 is reduced along with the increase of permeated water, the foaming and the deterioration and deodorization of the lubricating oil are also caused, the lubrication protection effect of the lubricating oil is damaged, not only can early wear and damage of rotary matching parts such as bearings, gears and the like in the reduction gearbox 1 be caused, but also the inner surface of the reduction gearbox body 11, a transmission shaft, gears and metal parts can be corroded or corroded. The service life of lubricating oil in the reduction gearbox 1 is reduced, and the service life of all metal parts in the reduction gearbox 1 is also reduced, so long as any part in the reduction gearbox 1 is damaged or lubricating oil needs to be replaced, the maintenance is stopped for more than 24 hours, large economic losses can be caused for enterprises, the direct economic losses caused for the enterprises each time are up to 60 ten thousand yuan, and the indirect economic losses caused by stopping production are up to about 200 ten thousand yuan. Therefore, a waterproof structure is additionally arranged on the reduction gearbox 1 of the steel pipe tension reducing mill, so that cooling water sprayed from the outside cannot enter the reduction gearbox 1, and the defects in the prior art are thoroughly eliminated.
The invention comprises the following steps:
the invention aims to provide a drainage waterproof structure of a reduction gearbox of a tension warp-reducing machine, which can drain water liquid entering between a lower outer sheath and a power output shaft, and can effectively prevent the water liquid from seeping into an inner cavity of the reduction gearbox through a specific mechanical sealing structure, so that various defects caused by the fact that cooling water enters the reduction gearbox to be mixed with lubricating oil are avoided.
The technical scheme adopted by the invention is as follows:
the utility model provides a tension subtracts row waterproof construction of quick-witted reducing gear box, includes reducing gear box, roller rotatory meshing axle subassembly and flexible control part, the reducing gear box includes reducing gear box body, power input shaft, drive gear group and power output shaft, power input shaft installs on the reducing gear box body respectively through two sets of bearings, power output shaft installs on the reducing gear box body through two sets of bearings and bearing end cover that has the skeleton sealing washer, power input shaft passes through the rotation of drive gear group drive power output shaft, power input shaft is driven by the motor, power output shaft is the hollow shaft, be equipped with the spline in power output shaft's upper segment hole, be fixed with the spring holder at power output shaft's up end, be equipped with lower oversheath outside the spring holder, the lower terminal surface of lower oversheath and the up end sealing connection of water diversion cover, the lower terminal surface of water diversion cover is fixed on the bearing end cover, the rotatory meshing axle subassembly of cooperation plug-in roller in power output shaft's spline hole, the rotatory meshing axle subassembly of roll includes main reset spring, meshing axle, upper axle sleeve and bi-polar butt joint part, main reset spring, meshing axle cartridge are in the hole of power output shaft, the upper end sleeve is fixed mounting in the upper end sleeve is equipped with the spline hole at the upper end sleeve and lower end-butt joint part, the upper end sleeve is equipped with the mating with the upper end-end and lower end-piece in the upper end sleeve and lower end-piece, the upper end-sleeve is realized in the butt joint and the mating with the upper end-joint part. The telescopic control part is arranged at the lower end of the meshing shaft through a bearing and is controlled by a reciprocating linear movement type hydraulic cylinder, and the telescopic control part is characterized in that: a water guiding sleeve is arranged between the lower outer sheath and the bearing end cover.
Further, the water diversion sleeve is provided with a water diversion hole on the inclined inner side surface.
Further, an axial water-proof cap is arranged at the bottom of the water diversion sleeve, the outer diameter of the water-proof cap is smaller than the diameter of the inner hole of the water diversion sleeve, and the top surface of the water-proof cap is higher than the bottom edge of the water diversion hole.
The water diversion waterproof principle of the invention is as follows:
when cooling spray water is sprayed to the high Wen Huangguan and double-end butt joint parts, a large amount of mist water vapor is generated, the mist water vapor is condensed into liquid through a gap between the upper sheath and the lower sheath on the inner hole side wall of the lower sheath, then enters the gap between the lower sheath and the power output shaft and the bearing end cover along the inner hole side wall of the lower sheath, as the water diversion sleeve with the water diversion holes on the side surface is additionally arranged between the lower sheath and the bearing end cover, after the water vapor is condensed into liquid, enters the inner cavity of the water diversion sleeve along the inner hole side wall of the lower sheath, enters the gap bottom between the lower sheath and the power output shaft and the bearing end cover, and is discharged from the water diversion holes on the inclined inner side surface of the water diversion sleeve, even if the power output shaft and the skeleton seal ring are laterally deformed in a reverse side, the skeleton seal ring can generate unilateral abrasion to the power output shaft, and no pressure difference exists due to the water liquid leaked to the water diversion holes is preferentially discharged from the water diversion holes, and cannot permeate into the inner cavity of the reduction box body from the seal fit section of the skeleton seal ring and the power output shaft, and a mixing path is prevented. If an axial water-proof cap is additionally arranged at the bottom of the water diversion sleeve, the outer diameter of the water-proof cap is smaller than the diameter of the inner hole of the water diversion sleeve, and the top surface of the water-proof cap is higher than the bottom edge of the water diversion hole. Therefore, cooling water can not enter the inner cavity of the reduction gearbox body, the accident that the cooling water permeates into the inner cavity of the reduction gearbox body can be eliminated from the mechanical structure, various defects caused by oil-water mixing are eliminated, the service life and the replacement period of the lubricating oil of the reduction gearbox are prolonged, and after the structure is adopted, the service replacement period of the lubricating oil is prolonged to 24 months from the original 4 months, the overhaul period of the reduction gearbox is as long as 18 months, the production cost and the maintenance cost are reduced by 3/5 compared with the prior art, and the economic benefit and the social benefit are very remarkable.
Description of the drawings:
FIG. 1 is a schematic view of the connection of a stretch reducer reduction gearbox to a roll unit;
FIG. 2 is an enlarged view of a portion of the portion I of FIG. 1;
FIG. 3 is a schematic diagram of the structure of the present invention;
FIG. 4 is an enlarged view of a portion of the connection between the water jacket, bearing end cap, lower outer jacket and water barrier cap at II of FIG. 3;
fig. 5 is an enlarged view of fig. 4 a.
In the figure: 1-a reduction gearbox; 2-a roller rotating engagement shaft assembly; 3-telescoping control means; 4-water guiding sleeve; 5-a water-proof cap; 11-a reduction gearbox body; 12-a power input shaft; 13-a drive gear set; 14-a power output shaft; 15-a framework sealing ring; 16-bearing end caps; 17-spring seat; 18-a lower outer sheath; 21-a main return spring; 22-engagement shaft; 23-upper engagement sleeve; 24-sheathing; 25-double ended docking component; 26-fine tuning spring; 27-a bullet shaft; 41-water diversion hole.
The specific embodiment is as follows:
the following detailed description of specific embodiments of the invention refers to the accompanying drawings:
example 1: the utility model provides a draw-bar waterproof structure of tension warp-reducing machine reducing gear box, as shown in figures 3-5, including reducing gear box 1, roll rotation meshing axle subassembly 2 and flexible control part 3, reducing gear box 1 includes reducing gear box 11, power input shaft 12, drive gear group 13 and power output shaft 14, power input shaft 12 is installed on reducing gear box 11 respectively through two sets of bearings, power output shaft 14 is installed on reducing gear box 11 through two sets of bearings and bearing end cover 16 with skeleton sealing washer 15, power input shaft 12 passes through the rotation of drive gear group 13 drive power output shaft 14, power input shaft 12 is driven by the motor, power output shaft 14 is the hollow axle, be equipped with the spline in the upper segment hole of power output shaft 14, be fixed with spring holder 17 at power output shaft 14's up end, be equipped with down oversheath 18 outside spring holder 17, the lower end face of the lower outer sheath 18 is in sealing connection with the upper end face of the water diversion sleeve 4, the lower end face of the water diversion sleeve 4 is fixed on the bearing end cover 16, a roller rotary meshing shaft assembly 2 is inserted in a spline inner hole of the power output shaft 14 in a matching way, the roller rotary meshing shaft assembly 2 comprises a main return spring 21, a meshing shaft 22, an upper meshing shaft sleeve 23, an upper sheath 24 and a double-end butting part 25, the main return spring 21 and the meshing shaft 22 are inserted in the spline inner hole of the power output shaft 14, the upper meshing shaft sleeve 23 is fixedly arranged at the upper end of the meshing shaft 22, the double-end butting part 25 is sleeved in the spline inner hole at the upper end of the upper meshing shaft sleeve 23 through a spline structure, a fine tuning spring 26 and a spring mandrel 27 are arranged between the double-end butting part 25 and the upper meshing shaft sleeve 23, so that micro telescopic adjustment of the double-end butting part 25 relative to the upper meshing shaft sleeve 23 is realized, the upper sheath 24 is fixed on the excircle of the upper meshing shaft sleeve 23, the lower end of the inner bore of the upper sheath 24 is in clearance fit with the outer circumference of the lower outer sheath 18. The telescopic control part 3 is arranged at the lower end of the meshing shaft 22 through a bearing and is controlled by a reciprocating linear movement type hydraulic cylinder, a water diversion sleeve 4 is arranged between the lower outer sheath 18 and the bearing end cover 16, the water diversion sleeve 4 is provided with a water diversion hole 41 on the inclined inner side surface, the bottom of the water diversion sleeve 4 is provided with an axial water isolation cap 5, the outer diameter of the water isolation cap 5 is smaller than the inner hole diameter of the water diversion sleeve 4, and the top surface of the water isolation cap 5 is higher than the bottom edge of the water diversion hole 41.
In many embodiments of the present invention, as long as the water diversion hole is provided at the joint of the bearing end cover 16 and the lower outer sheath 18, the water flowing into the inner hole of the lower outer sheath 18 is automatically discharged, and all the schemes of preventing the water from entering the reduction gearbox from the outer circle matching section of the bearing end cover 16 and the power output shaft 14 are within the protection scope of the present invention.
Claims (1)
1. The utility model provides a draw row waterproof construction of tension warp reduction machine reducing gear box, includes reducing gear box (1), rotatory meshing axle subassembly (2) of roll and flexible control part (3), reducing gear box (1) are including reducing gear box (11), power input axle (12), drive gear group (13) and power output axle (14), power input axle (12) are installed respectively on reducing gear box (11) through two sets of bearings, power output axle (14) are installed on reducing gear box (11) through two sets of bearings and bearing end cover (16) that have skeleton sealing washer (15), power input axle (12) are through the rotation of drive gear group (13) drive power output axle (14), power input axle (12) are driven by the motor, power output axle (14) are hollow axle, be equipped with the spline in the upper segment hole of power output axle (14), the up end of power output axle (14) is fixed with spring holder (17), be equipped with down oversheath (18) outward at spring holder (17), the lower terminal surface of oversheath (18) is sealed with the up end face of drawing water jacket (4), the rotation of diversion axle (12) through drive gear group (13) drive power output axle (14) is at the rotation of rotating in the main shaft (14), the roller subassembly is inserted in the rotatory meshing axle (2) of roll, the main shaft (14) is meshed in the hole, the roller subassembly is inserted to the roller The device comprises a meshing shaft (22), an upper meshing shaft sleeve (23), an upper sheath (24) and a double-end butt joint part (25), wherein a main reset spring (21) and the meshing shaft (22) are inserted into a spline inner hole of a power output shaft (14), the upper meshing shaft sleeve (23) is fixedly arranged at the upper end of the meshing shaft (22), the double-end butt joint part (25) is sleeved in the spline inner hole at the upper end of the upper meshing shaft sleeve (23) through a spline structure, a fine tuning spring (26) and a spring core shaft (27) are arranged between the double-end butt joint part (25) and the upper meshing shaft sleeve (23), so that micro telescopic adjustment of the double-end butt joint part (25) relative to the upper meshing shaft sleeve (23) is realized, the upper sheath (24) is fixed on the outer circle of the upper meshing shaft sleeve (23), the lower end of the inner hole of the upper sheath (24) is in clearance fit with the outer circle of the lower outer sheath (18), and a telescopic control part (3) is arranged at the lower end of the meshing shaft (22) through a bearing, and is controlled by a reciprocating linear moving hydraulic cylinder, and is characterized in that: be equipped with drainage cover (4) between lower oversheath (18) and bearing end cover (16), drainage cover (4) are equipped with diversion hole (41) on the medial surface of slope, are equipped with axial water proof cap (5) in the bottom of diversion cover (4), and the external diameter of water proof cap (5) is less than diversion cover (4) hole diameter, and the top surface of water proof cap (5) is higher than the base of diversion hole (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510282756.4A CN104896077B (en) | 2015-05-28 | 2015-05-28 | Drainage waterproof structure of tension warp-reducing machine reduction gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510282756.4A CN104896077B (en) | 2015-05-28 | 2015-05-28 | Drainage waterproof structure of tension warp-reducing machine reduction gearbox |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104896077A CN104896077A (en) | 2015-09-09 |
| CN104896077B true CN104896077B (en) | 2023-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510282756.4A Active CN104896077B (en) | 2015-05-28 | 2015-05-28 | Drainage waterproof structure of tension warp-reducing machine reduction gearbox |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107321798B (en) * | 2017-08-24 | 2023-10-24 | 北京京诚瑞信长材工程技术有限公司 | Corner gear box for single-frame transmission steel pipe tension reducing machine |
| CN110762197B (en) * | 2019-10-22 | 2023-11-24 | 西安煤矿机械有限公司 | Lubricating and cooling device and method for traveling box of coal mining machine |
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| JP2000246321A (en) * | 1999-03-01 | 2000-09-12 | Ishikawajima Harima Heavy Ind Co Ltd | Table roller equipment of hot-rolled material |
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| CN201232752Y (en) * | 2008-07-22 | 2009-05-06 | 天津天重中直科技工程有限公司 | Sealing device for output terminal of speed reducer |
| CN102066710A (en) * | 2008-04-16 | 2011-05-18 | 米提亚·维克托·辛德克斯 | New reciprocating machines and other devices |
| CN102705498A (en) * | 2012-06-27 | 2012-10-03 | 苏州通润驱动设备股份有限公司 | Bearing lubricating structure of reduction box |
| CN204716952U (en) * | 2015-05-28 | 2015-10-21 | 常州常宝精特能源管材有限公司 | Tension force subtracts the ejectment waterproof construction through machine speed reducer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1095947A (en) * | 1954-02-08 | 1955-06-07 | Self-propelled automatic overhead watering device | |
| CN2252291Y (en) * | 1996-05-06 | 1997-04-16 | 李清临 | Inner-cooled roll slag crusher |
| JP2000088727A (en) * | 1998-09-09 | 2000-03-31 | Kawasaki Steel Corp | Device for both hot roll abrasion and thermal impact test |
| JP2000246321A (en) * | 1999-03-01 | 2000-09-12 | Ishikawajima Harima Heavy Ind Co Ltd | Table roller equipment of hot-rolled material |
| CN2663055Y (en) * | 2003-11-20 | 2004-12-15 | 郑州机械研究所 | Worm-gear speed reducer for drawing and straightening machine |
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| CN104896077A (en) | 2015-09-09 |
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