CN107400768A - A kind of manufacture of cement pressure roller roll surface built-up welding flame pre-heating system - Google Patents
A kind of manufacture of cement pressure roller roll surface built-up welding flame pre-heating system Download PDFInfo
- Publication number
- CN107400768A CN107400768A CN201710705238.8A CN201710705238A CN107400768A CN 107400768 A CN107400768 A CN 107400768A CN 201710705238 A CN201710705238 A CN 201710705238A CN 107400768 A CN107400768 A CN 107400768A
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- Prior art keywords
- built
- welding
- pressure roller
- roll surface
- radial direction
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/52—Methods of heating with flames
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Optics & Photonics (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of manufacture of cement pressure roller roll surface built-up welding flame pre-heating system, support column and the pre- thermal shield of built-up welding flame are rotated including pressure roller, the pre- thermal shield of built-up welding flame includes built-up welding preheating arc cover plate, the axis of the built-up welding preheating arc cover plate overlaps with the axis of pressure roller rotation support column, the axis both ends of the built-up welding preheating arc cover plate are each provided with a built-up welding preheating fan shape baffle, the axis that two built-up welding preheating fan shape baffles are each perpendicular to the pressure roller rotation support column is set, and two built-up welding preheating fan shape baffles are respectively positioned at the axial both ends of pressure roller outside, roll surface heating flame shower nozzle is provided with each built-up welding preheating fan shape baffle, each roll surface heating flame shower nozzle preheats the gap between arc cover plate and pressure roller roll surface towards the built-up welding.The present invention can improve the heat utilization ratio of pre- thermal-flame, so as to reduce the energy loss of roll surface built-up welding flame pre-heating system, improve the efficiency of heating surface of preheating.
Description
Technical field
The present invention relates to a kind of cement production process equipment technical field, particularly a kind of manufacture of cement pressure roller roll surface built-up welding
Flame pre-heating system.
Background technology
Firstly the need of according to processing compound blended cement raw material in the production process of cement, then cement slurry is put into
In cement rotary kiln, clinker is made in the calcining of cement mixing raw material；In order to ensure that cement raw material can be accurately according to work
Skill proportioning is fed intake, while cement raw material is equably mixed, rapidly reaction curing, is generally required for using pressure roller
The cement raw material of bulky grain or small fast shape is clayed into power shape.After pressure roller long-term operation, the abrasion of roll surface is larger, it is necessary to carry out heap
The multiple roll surface wear-resisting layer with higher-strength and wearability with acquisition of repair welding；In addition, the pressure roller of brand-new is also required in roll surface built-up welding
A floor height intensity, the wear-resistant alloy layer of super abrasive are formed, so as to improve the service life of pressure roller, reduces the frequency of maintenance of pressure roller.
Wearing layer usually requires first to be preheated before built-up welding, the surface of pressure roller is heated to eliminate internal stress, then
Built-up welding operation is carried out again, to ensure the quality of wearing layer built-up welding.Conventional manufacture of cement pressure roller roll surface built-up welding flame pre-heating system
The problem of energy loss is big, and the efficiency of heating surface is low be present, it is necessary to design a kind of new roll surface built-up welding flame pre-heating system with gram
Take above-mentioned deficiency.
The content of the invention
For overcome the deficiencies in the prior art, the invention provides a kind of preheating of manufacture of cement pressure roller roll surface built-up welding flame to be
System, it is possible to increase the heat utilization ratio of pre- thermal-flame, so as to reduce the energy loss of roll surface built-up welding flame pre-heating system, improve pre-
The efficiency of heating surface of heat.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of manufacture of cement pressure roller roll surface built-up welding flame pre-heating system, including for supporting the pressure roller of pressure roller through pressure roller axle center
Support column, the pre- thermal shield of built-up welding flame set towards pressure roller roll surface are rotated, the pre- thermal shield of built-up welding flame includes heap
Weldering preheating arc cover plate, the axis of the built-up welding preheating arc cover plate overlaps with the axis of pressure roller rotation support column, described
The axis both ends of built-up welding preheating arc cover plate are each provided with a built-up welding preheating fan shape baffle, two fan-shaped gears of built-up welding preheating
The axis that plate is each perpendicular to the pressure roller rotation support column is set, and two built-up welding preheating fan shape baffles are located at pressure roller respectively
Axial both ends on the outside of, be provided with roll surface heating flame shower nozzle on each built-up welding preheating fan shape baffle, each roller
Face heating flame shower nozzle preheats the gap between arc cover plate and pressure roller roll surface towards the built-up welding.
As the further improvement of above-mentioned technical proposal, the side of each built-up welding preheating fan shape baffle is fixedly connected with institute
The axial end portion of built-up welding preheating arc cover plate is stated, the opposite side of each built-up welding preheating fan shape baffle is provided with preheating flame gas
Body delivery pipe, each pre- hot flame gases delivery pipe are respectively connected with a roll surface heating flame shower nozzle.
As the further improvement of above-mentioned technical proposal, it is radially heat-insulated that the pre- thermal shield of built-up welding flame also includes first
Baffle plate and the second radial direction thermal baffle, the first radial direction thermal baffle and the second radial direction thermal baffle are along the footpath of pressure roller
To setting, the first radial direction thermal baffle and the second radial direction thermal baffle are located at built-up welding preheating arc cover plate and pressure
Between the roll surface of roller；And the built-up welding preheating arc cover plate is arranged between the roll surface summit of pressure roller and bottom, first footpath
The lower end of the built-up welding preheating arc cover plate is arranged to thermal baffle, the second radial direction thermal baffle is arranged at the built-up welding
Preheat the upper end of arc cover plate, each roll surface heating flame shower nozzle is respectively positioned on the first radial direction thermal baffle and described the
Between two radial direction thermal baffles.
As the further improvement of above-mentioned technical proposal, also set between the roll surface of the built-up welding preheating arc cover plate and pressure roller
The 3rd radial direction thermal baffle and the 4th radial direction thermal baffle are equipped with, the 3rd radial direction thermal baffle and the 4th radial direction are heat-insulated
Baffle plate being radially arranged along pressure roller；And the 3rd radial direction thermal baffle and the 4th radial direction thermal baffle from top to bottom according to
It is secondary to be arranged between the first radial direction thermal baffle and the second radial direction thermal baffle；The 3rd radial direction thermal baffle and
The 4th radial direction thermal baffle by the space between the first radial direction thermal baffle and the second radial direction thermal baffle from
The lower heat-insulation chamber of preheating, roll surface built-up welding heating chamber and the upper heat-insulation chamber of preheating are divided on down successively, each the roll surface heating fire
Flame shower nozzle is respectively positioned in the roll surface built-up welding heating chamber.
As the further improvement of above-mentioned technical proposal, the side of built-up welding preheating arc cover plate towards pressure roller roll surface,
The opposite side of the built-up welding preheating arc cover plate is fixedly connected with protective cover drive cylinder, and the cylinder barrel of the protective cover drive cylinder is consolidated
Fixed to set, the piston-rod end of the protective cover drive cylinder is fixedly connected with the built-up welding preheating arc cover plate, and the protection
Cover drive cylinder rotates being radially arranged for support column along the pressure roller.
As the further improvement of above-mentioned technical proposal, it is provided with the built-up welding preheating arc cover plate for activity installation
The the first radial direction baffle plate slot and the second radial direction baffle plate of the second radial direction thermal baffle and the 4th radial direction thermal baffle are inserted
Groove.
Compared with prior art, the beneficial effects of the invention are as follows：
A kind of manufacture of cement pressure roller roll surface built-up welding flame pre-heating system provided by the present invention, by setting the preheating of built-up welding flame anti-
Shield, roll surface heating flame shower nozzle is set in the pre- thermal shield of built-up welding flame, it is possible to increase the heat utilization ratio of pre- thermal-flame,
So as to reduce the energy loss of roll surface built-up welding flame pre-heating system, the efficiency of heating surface of preheating is improved；And by setting first radially
Baffle plate slot and the second radial direction baffle plate slot, make the second radial direction thermal baffle and the 4th radial direction thermal baffle can with activity adjustment with
Gap between pressure roller roll surface, so as to outwards convey certain heat from gap, the roll surface after preheating is protected with playing
The effect of temperature, avoids it from producing internal stress again so as to reduce the cooldown rate of roll surface.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is a kind of end face structure signal of manufacture of cement pressure roller roll surface built-up welding flame pre-heating system of the present invention
Figure；
Fig. 2 is a kind of side structure schematic diagram of manufacture of cement pressure roller roll surface built-up welding flame pre-heating system of the present invention；
Fig. 3 is the cross-sectional view of the pre- thermal shield of built-up welding flame of the present invention.
Embodiment
Referring to figs. 1 to Fig. 3, Fig. 1 to Fig. 3 is the structural representation of a specific embodiment of the invention.
As shown in Figure 1 to Figure 3, a kind of manufacture of cement pressure roller roll surface built-up welding flame pre-heating system, including for through pressure roller
Axle center with support the pressure roller of pressure roller rotation support column 1, towards pressure roller roll surface set the pre- thermal shield of built-up welding flame, the built-up welding
The pre- thermal shield of flame includes built-up welding preheating arc cover plate 2, and the axis of the built-up welding preheating arc cover plate 2 rotates with the pressure roller
The axis of support column 1 overlaps, and the axis both ends of the built-up welding preheating arc cover plate 2 are each provided with a built-up welding preheating fan shape baffle
3, the axis that two built-up welding preheating fan shape baffles 3 are each perpendicular to the pressure roller rotation support column 1 is set, and two heaps
Weldering preheating fan shape baffle 3 on the outside of the axial both ends of pressure roller, is provided with each built-up welding preheating fan shape baffle 3 respectively
Roll surface heating flame shower nozzle 4, each roll surface heating flame shower nozzle 4 is towards built-up welding preheating arc cover plate 2 and pressure roller
Gap between roll surface.
As preferable, the side of each built-up welding preheating fan shape baffle 3 is fixedly connected with the built-up welding preheating arc-shaped cover
The axial end portion of plate 2, the opposite side of each built-up welding preheating fan shape baffle 3 are provided with pre- hot flame gases delivery pipe 5, each
The pre- hot flame gases delivery pipe 5 is respectively connected with a roll surface heating flame shower nozzle 4.
As preferable, the pre- thermal shield of built-up welding flame also include the first radial direction thermal baffle 6 and the second radial direction every
Heat shield 7, the first radial direction thermal baffle 6 and the second radial direction thermal baffle 7 being radially arranged along pressure roller, described
One radial direction thermal baffle 6 and the second radial direction thermal baffle 7 be located at built-up welding preheating arc cover plate 2 and pressure roller roll surface it
Between；And the built-up welding preheating arc cover plate 2 is arranged between the roll surface summit of pressure roller and bottom, the first radial direction thermal baffle
6 are arranged at the lower end of the built-up welding preheating arc cover plate 2, and the second radial direction thermal baffle 7 is arranged at the built-up welding preheating arc
The upper end of shape cover plate 2, each roll surface heating flame shower nozzle 4 are respectively positioned on the first radial direction thermal baffle 6 and described second
Between radial direction thermal baffle 7.The 3rd heat-insulated gear of radial direction is additionally provided between the built-up welding preheating arc cover plate 2 and the roll surface of pressure roller
The radial direction thermal baffle 9 of plate 8 and the 4th, the 3rd radial direction thermal baffle 8 and the 4th radial direction thermal baffle 9 are along pressure roller
It is radially arranged；And the 3rd radial direction thermal baffle 8 and the 4th radial direction thermal baffle 9 be set in turn in from top to bottom it is described
Between first radial direction thermal baffle 6 and the second radial direction thermal baffle 7；The 3rd radial direction thermal baffle 8 and the described 4th
Radial direction thermal baffle 9 by the space between the first radial direction thermal baffle 6 and the second radial direction thermal baffle 7 from bottom to top
The lower heat-insulation chamber 10 of preheating, roll surface built-up welding heating chamber 11 and the upper heat-insulation chamber 12 of preheating, each roll surface heating fire are divided into successively
Flame shower nozzle 4 is respectively positioned in the roll surface built-up welding heating chamber 11.
As preferable, the side of the built-up welding preheating arc cover plate 2 preheats arc-shaped cover towards pressure roller roll surface, the built-up welding
The opposite side of plate 2 is fixedly connected with protective cover drive cylinder 13, and the cylinder barrel fixed setting of the protective cover drive cylinder 13 is described anti-
The piston-rod end of shield drive cylinder 13 is fixedly connected with the built-up welding preheating arc cover plate 2, and the protective cover drive cylinder
13 rotate being radially arranged for support column 1 along the pressure roller.It is provided with the built-up welding preheating arc cover plate 2 for activity installation institute
State the second radial direction thermal baffle 7 and the first radial direction baffle plate slot 14 of the 4th radial direction thermal baffle 9 and the second radial direction baffle plate
Slot 15.
During work, pressure roller is arranged on pressure roller rotation support column 1 first, is then rotated and supported by the pressure roller
Post 1 rotates with dynamic pressure roller, and the pressure roller roll surface for preheating needs be located at built-up welding preheating arc cover plate 2, it is then fixed described in
Pressure roller rotates support column 1, the piston rod elongation of the protective cover drive cylinder 13, makes the first radial direction thermal baffle 6 and institute
State the 3rd radial direction thermal baffle 8 to be resisted against on pressure roller roll surface, then by the pre- hot flame gases delivery pipe 5 to the roll surface
Heating flame shower nozzle 4 conveys preheated fuel gas, is sprayed by the roll surface heating flame shower nozzle 4 into the roll surface built-up welding heating chamber 11
Flame is penetrated to be preheated；Pressure roller is rotated clockwise to top and carries out built-up welding operation as shown in Figure 1 after the completion of preheating, while can adjust
The spacing of the second radial direction thermal baffle 7 and the 4th radial direction thermal baffle 9 and roll surface is saved, so as to from the roll surface built-up welding
Certain heat is discharged in heating chamber 11, for carrying out isothermal holding to the roll surface after preheating.
The preferable implementation to the present invention is illustrated above, and certainly, the present invention can also use and above-mentioned implementation
The different form of mode, the equivalent conversion that those skilled in the art are made on the premise of without prejudice to spirit of the invention
Or corresponding change, it should all belong in protection scope of the present invention.
Claims (6)
- A kind of 1. manufacture of cement pressure roller roll surface built-up welding flame pre-heating system, it is characterised in that：Including for through pressure roller axle center with Support the pressure roller rotation support column of pressure roller（1）, towards pressure roller roll surface set the pre- thermal shield of built-up welding flame, the built-up welding flame Pre- thermal shield includes built-up welding preheating arc cover plate（2）, the built-up welding preheating arc cover plate（2）Axis and the pressure roller rotate Support column（1）Axis overlap, the built-up welding preheats arc cover plate（2）To be each provided with built-up welding preheating fan-shaped at axis both ends Baffle plate（3）, two built-up welding preheating fan shape baffles（3）It is each perpendicular to the pressure roller rotation support column（1）Axis set, and Two built-up welding preheating fan shape baffles（3）Respectively on the outside of the axial both ends of pressure roller, each fan-shaped gear of built-up welding preheating Plate（3）On be provided with roll surface heating flame shower nozzle（4）, each roll surface heating flame shower nozzle（4）Towards the built-up welding Preheat arc cover plate（2）Gap between pressure roller roll surface.
- A kind of 2. manufacture of cement pressure roller roll surface built-up welding flame pre-heating system according to claim 1, it is characterised in that：Each The built-up welding preheats fan shape baffle（3）Side be fixedly connected with built-up welding preheating arc cover plate（2）Axial end portion, Mei Gesuo State built-up welding preheating fan shape baffle（3）Opposite side be provided with pre- hot flame gases delivery pipe（5）, each pre- hot flame gases Delivery pipe（5）It is respectively connected with a roll surface heating flame shower nozzle（4）.
- A kind of 3. manufacture of cement pressure roller roll surface built-up welding flame pre-heating system according to claim 1, it is characterised in that：It is described The pre- thermal shield of built-up welding flame also includes the first radial direction thermal baffle（6）With the second radial direction thermal baffle（7）, described first radially Thermal baffle（6）With the second radial direction thermal baffle（7）Being radially arranged along pressure roller, the first radial direction thermal baffle （6）With the second radial direction thermal baffle（7）Arc cover plate is preheated positioned at the built-up welding（2）Between the roll surface of pressure roller；And institute State built-up welding preheating arc cover plate（2）It is arranged between the roll surface summit of pressure roller and bottom, the first radial direction thermal baffle（6）If It is placed in the built-up welding preheating arc cover plate（2）Lower end, the second radial direction thermal baffle（7）It is arranged at the built-up welding preheating arc Shape cover plate（2）Upper end, each roll surface heating flame shower nozzle（4）It is respectively positioned on the first radial direction thermal baffle（6）And institute State the second radial direction thermal baffle（7）Between.
- A kind of 4. manufacture of cement pressure roller roll surface built-up welding flame pre-heating system according to claim 3, it is characterised in that：It is described Built-up welding preheats arc cover plate（2）The 3rd radial direction thermal baffle is additionally provided between the roll surface of pressure roller（8）It is radially heat-insulated with the 4th Baffle plate（9）, the 3rd radial direction thermal baffle（8）With the 4th radial direction thermal baffle（9）Being radially arranged along pressure roller；And The 3rd radial direction thermal baffle（8）With the 4th radial direction thermal baffle（9）First footpath is set in turn in from top to bottom To thermal baffle（6）With the second radial direction thermal baffle（7）Between；The 3rd radial direction thermal baffle（8）With the described 4th Radial direction thermal baffle（9）By the first radial direction thermal baffle（6）With the second radial direction thermal baffle（7）Between space from The lower heat-insulation chamber of preheating is divided on down successively（10）, roll surface built-up welding heating chamber（11）With the upper heat-insulation chamber of preheating（12）, Mei Gesuo State roll surface heating flame shower nozzle（4）It is respectively positioned on the roll surface built-up welding heating chamber（11）In.
- A kind of 5. manufacture of cement pressure roller roll surface built-up welding flame pre-heating system according to claim 4, it is characterised in that：It is described Built-up welding preheats arc cover plate（2）Side towards pressure roller roll surface, the built-up welding preheats arc cover plate（2）Opposite side be fixedly connected Protective cover drive cylinder（13）, the protective cover drive cylinder（13）Cylinder barrel fixed setting, the protective cover drive cylinder （13）Piston-rod end be fixedly connected with built-up welding preheating arc cover plate（2）, and the protective cover drive cylinder（13）Along institute State pressure roller rotation support column（1）Be radially arranged.
- A kind of 6. manufacture of cement pressure roller roll surface built-up welding flame pre-heating system according to claim 5, it is characterised in that：It is described Built-up welding preheats arc cover plate（2）On be provided with the second radial direction thermal baffle be installed for activity（7）With the described 4th radially Thermal baffle（9）The first radial direction baffle plate slot（14）With the second radial direction baffle plate slot（15）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710705238.8A CN107400768B (en) | 2017-08-17 | 2017-08-17 | A kind of manufacture of cement pressure roller roll surface built-up welding flame pre-heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710705238.8A CN107400768B (en) | 2017-08-17 | 2017-08-17 | A kind of manufacture of cement pressure roller roll surface built-up welding flame pre-heating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107400768A true CN107400768A (en) | 2017-11-28 |
| CN107400768B CN107400768B (en) | 2019-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710705238.8A Active CN107400768B (en) | 2017-08-17 | 2017-08-17 | A kind of manufacture of cement pressure roller roll surface built-up welding flame pre-heating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114192927A (en) * | 2021-12-24 | 2022-03-18 | 芜湖通和汽车管路***有限公司 | Welding positioning tool for end part of automobile pipeline |
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|---|---|---|---|---|
| CN1420200A (en) * | 2001-11-16 | 2003-05-28 | 广州有色金属研究院 | Method and apparatus for remelting surface coatings of large roll |
| CN201872343U (en) * | 2010-11-25 | 2011-06-22 | 北京中兰环境工程有限公司 | Plastic welding machine |
| CN102699580A (en) * | 2012-01-20 | 2012-10-03 | 江苏普格机械有限公司 | Barrel preheating device |
| CN202894610U (en) * | 2012-05-22 | 2013-04-24 | 中国石油天然气第一建设公司 | Heating device for shell plate of pressure vessel |
| CN103481012A (en) * | 2013-09-22 | 2014-01-01 | 湖州市银鑫轧辊有限公司 | Welding repairing method for rolls |
| CN105397354A (en) * | 2015-12-20 | 2016-03-16 | 安徽伟宏钢结构集团股份有限公司 | Welding preheating method for arc-shaped steel component |
| CN105798424A (en) * | 2016-05-31 | 2016-07-27 | 沙洲职业工学院 | Roll surfacing repair device and repair method |
-
2017
- 2017-08-17 CN CN201710705238.8A patent/CN107400768B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1420200A (en) * | 2001-11-16 | 2003-05-28 | 广州有色金属研究院 | Method and apparatus for remelting surface coatings of large roll |
| CN201872343U (en) * | 2010-11-25 | 2011-06-22 | 北京中兰环境工程有限公司 | Plastic welding machine |
| CN102699580A (en) * | 2012-01-20 | 2012-10-03 | 江苏普格机械有限公司 | Barrel preheating device |
| CN202894610U (en) * | 2012-05-22 | 2013-04-24 | 中国石油天然气第一建设公司 | Heating device for shell plate of pressure vessel |
| CN103481012A (en) * | 2013-09-22 | 2014-01-01 | 湖州市银鑫轧辊有限公司 | Welding repairing method for rolls |
| CN105397354A (en) * | 2015-12-20 | 2016-03-16 | 安徽伟宏钢结构集团股份有限公司 | Welding preheating method for arc-shaped steel component |
| CN105798424A (en) * | 2016-05-31 | 2016-07-27 | 沙洲职业工学院 | Roll surfacing repair device and repair method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114192927A (en) * | 2021-12-24 | 2022-03-18 | 芜湖通和汽车管路***有限公司 | Welding positioning tool for end part of automobile pipeline |
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| Publication number | Publication date |
|---|---|
| CN107400768B (en) | 2019-04-16 |
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Effective date of registration: 20190319 Address after: 516800 Longhua Town, Longmen County, Huizhou City, Guangdong Province Applicant after: Huizhou Guangda Cement Enterprise Co., Ltd. Address before: 241080 South of Wutong Road, Sanshan District, Wuhu City, Anhui Province Applicant before: Anhui Zhuo Huang Machinery Equipment Co., Ltd. |
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