CN110514018A - A kind of smelting furnace heat exchange cooling device and operating method - Google Patents
A kind of smelting furnace heat exchange cooling device and operating method Download PDFInfo
- Publication number
- CN110514018A CN110514018A CN201910816587.6A CN201910816587A CN110514018A CN 110514018 A CN110514018 A CN 110514018A CN 201910816587 A CN201910816587 A CN 201910816587A CN 110514018 A CN110514018 A CN 110514018A
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- ring
- water
- smelting furnace
- rotating cylinder
- wall
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D9/00—Cooling of furnaces or of charges therein
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D9/00—Cooling of furnaces or of charges therein
- F27D2009/0002—Cooling of furnaces
- F27D2009/001—Cooling of furnaces the cooling medium being a fluid other than a gas
- F27D2009/0013—Cooling of furnaces the cooling medium being a fluid other than a gas the fluid being water
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A kind of smelting furnace heat exchange cooling device and operating method are related to a kind of heat exchange cooling device and operating method.Horizontal smelting furnace body fixes two ring flanges, more driving bull sticks are installed between two ring flanges, two ring sealing plates are sleeved on more driving bull sticks, driving bull stick both ends are fixed with gear, rotating cylinder inwall is formed with internal tooth and engages with multiple gears, driving bull stick is arranged pressure spring between ring flange and ring sealing plate, driving is wire lever among bull stick, squeeze water ring setting nut and wire lever threaded, water ring both side surface is squeezed to be staggered multiple water flowing tube heads, water flowing tube head is tilted to horizontal smelting furnace body outer wall, rotating cylinder outer wall is formed with a circle external tooth, servo motor has an outer tooth engagement of circle of driving wheel and rotating cylinder, ring sealing plate fixation is communicated with water inlet pipe and drainpipe.The reciprocating movement for squeezing water ring is realized by control servo motor steering angle, cooling water is sprayed through water flowing tube head realizes heat exchange cooling.
Description
Technical field
The present invention relates to a kind of heat exchange cooling device and operating method, especially a kind of smelting furnace heat exchange cooling device and behaviour
Make method.
Background technique
Smelting is a kind of refinement technique, refers to the methods of use roasting, melting, electrolysis and use chemical agent in ore
METAL EXTRACTION comes out, and reduces impurity contained in metal or increases certain ingredient in metal, to be smelt required metal, smelting
Indispensable stove when furnace is then metal smelt.
Smelting furnace is to accelerate cooling velocity to improve heat exchange efficiency in process, and the cooling dress of heat exchange usually can all be arranged
It sets, is generally divided into the more Electromechanical Control cooling heat-exchanging system of sensing element and lower-cost water cooling heat exchange pipeline, the former
Effect can real-time monitoring but higher cost, and service life is not grown, and the latter's application is more extensive in contrast, but existing
Problem is cooling water trickling in-line, increases heat transfer distance, and heat exchange cooling efficiency is lower.Therefore, it is necessary in traditional water
It is optimized on the basis of the form of cold and hot exchange, proposes a kind of apparatus and method that can be improved heat exchange cooling effect.
Summary of the invention
The purpose of the present invention is to provide a kind of smelting furnace heat exchange cooling device and operating methods, it passes through control servo electricity
Machine steering angle realizes the reciprocating movement for squeezing water ring, and cooling water is injected on horizontal smelting furnace body outer wall through water flowing tube head
Realize heat exchange cooling, effect is more preferable.
To achieve the above object, the present invention takes following technical proposals: a kind of smelting furnace heat exchange cooling device, including horizontal
Furnace body is smelted, the horizontal smelting furnace body shape is bottom there are two horizontally disposed round can shape and the fixations of its bottom both ends
Support, the smelting furnace heat exchange cooling device further include rotating cylinder, squeeze water ring, servo motor, two ring sealing plates, more drivings
Bull stick, more pressure springs and multiple gears, horizontal smelting furnace body outer wall head and the tail both ends are coaxially fixed, and there are two ring flanges, described
More driving bull sticks, described two ring sealing plates and described more drives are along the circumferential direction angularly installed between two ring flanges
Perforation and fixed seal ring is respectively set in turn bar corresponding position, and two ring sealing plates are sleeved on more driving bull sticks and difference
On the inside of neighbouring two ring flanges, it is coaxially fixed with gear on the inside of every driving bull stick both ends adjacent rings sealing plate respectively, described turn
Cylinder is sleeved on outside more driving bull sticks, and rotating cylinder inwall is formed with internal tooth and is engaged with multiple gears, every driving bull stick two
End is arranged with pressure spring respectively between ring flange and ring sealing plate, by the more pressure springs by two ring sealing plates to rotating cylinder
Corresponding end surface capping compresses, and two ring sealing plate inner surfaces and inner ring surface are provided with rubber mat, and more driving bull sticks are located at pair
Wire lever is partially disposed as between two gears answered, the extruding water ring gap setting is in rotating cylinder inwall and horizontal smelting
Between furnace body outer wall, squeezes water ring and through-hole and fixture nut, the spiral shell is respectively set in more driving bull stick corresponding positions
Female threaded one by one with the wire lever, squeezing water ring both side surface, along its circumferencial direction, angularly staggeredly perforation is set respectively
Multiple water flowing tube heads are set, the multiple water flowing tube head outer end is obliquely installed to horizontal smelting furnace body outer wall, rotating cylinder outer wall system
There is a circle external tooth, the servo motor driving has driving wheel and is engaged with the circle external tooth of rotating cylinder, and servo motor is logical
It crosses rack mounting plate to be connected and fixed with the collet, one of ring sealing plate outer surface fixation is communicated with water inlet pipe, another
A ring sealing plate outer surface fixation is communicated with drainpipe.
A kind of operating method of smelting furnace heat exchange cooling device of the invention, includes the following steps:
Step 1: squeezing the nut shift length of water ring previously according to the wire lever rotation angle measurement of driving bull stick,
Total rotation angle that bull stick is driven when water ring carries out single direction stroke between multiple gears at both ends is squeezed to calculate；
Step 2: it in conjunction with the internal tooth of rotating cylinder inwall and the transmission ratio of gear, calculates and turns when squeezing water ring single direction stroke
Total rotation angle of cylinder determines in conjunction with the transmission ratio of circle an external tooth and driving wheel of rotating cylinder outer wall and squeezes the unidirectional row of water ring
Total rotation angle of driving wheel when journey；
Step 3: water inlet pipe is connect with external cooling water supply pipeline, drainpipe is connect with externally drained pipeline, is being turned
Cooling water is filled in cylinder, the rotation of driving wheel positive and negative alternate is driven by programming Control servo motor according to above-mentioned calculated result, from
And move back and forth extruding water ring between rotating cylinder inwall and horizontal smelting furnace body outer wall, it squeezes water ring both side surface and hands over
Multiple water flowing tube heads are arranged in mistake perforation, and water flowing tube head outer end is obliquely installed to horizontal smelting furnace body outer wall, squeeze spray
Cooling water can be squeezed in water ring reciprocating movement, cooling water is injected in horizontal smelting furnace body outer wall through water flowing tube head
Upper combination flow of cooling water realizes heat exchange.
Compared with prior art, the beneficial effects of the present invention are: the present invention installs two additional in horizontal smelting furnace body exterior
Ring flange has rotating cylinder by pressure spring resilient support between two ring flanges, stores between rotating cylinder and horizontal smelting furnace body outer wall
Cooling water realizes the reciprocating movement for squeezing water ring by control servo motor steering angle, squeezes water ring both side surface and hands over
Multiple water flowing tube heads are arranged in mistake perforation, and water flowing tube head outer end is obliquely installed to horizontal smelting furnace body outer wall, squeeze spray
Water ring can squeeze cooling water in reciprocating movement, and cooling water is injected in outside horizontal smelting furnace body through water flowing tube head
Heat exchange cooling is realized on wall, clever structure, heat exchange cooling effect is more preferable, and high degree of automation, and it is strong to reduce hand labor
Degree has good application value.
Detailed description of the invention
Fig. 1 is the overall structure axonometric drawing of smelting furnace heat exchange cooling device of the invention；
Fig. 2 is the portion the A enlarged drawing of Fig. 1；
Fig. 3 is the portion the B enlarged drawing of Fig. 1；
Fig. 4 is the axonometric drawing of extruding water ring of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, is clearly and completely retouched to the technical solution in the present invention
It states, it is clear that described embodiment is only a part of the embodiment of invention, instead of all the embodiments, based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts,
It shall fall within the protection scope of the present invention.
Specific embodiment 1: as shown in Figure 1 to 4, the invention discloses a kind of smelting furnace heat exchange cooling devices, including
Horizontal smelting furnace body 1, horizontal 1 shape of smelting furnace body is horizontally disposed round can shape and its bottom both ends is fixed with two
A collet 1-1, the smelting furnace heat exchange cooling device further include rotating cylinder 5, squeeze 8, two water ring 7, servo motor annular envelopes
Plate 3, more driving bull sticks 2, more pressure springs 4 and multiple gears 6, horizontal 1 outer wall head and the tail both ends of smelting furnace body are coaxially fixed
There are two ring flange 1-2, more driving bull sticks 2 are along the circumferential direction angularly installed between described two ring flange 1-2, it is described
Perforation and fixed seal ring, two ring sealing plates are respectively set in two ring sealing plates 3 and 2 corresponding position of the more driving bull sticks
3 are sleeved on more driving bull sticks 2 and are respectively adjacent on the inside of two ring flange 1-2, every 2 both ends adjacent rings of driving bull stick envelope
3 inside of plate is coaxially fixed with gear 6 respectively, and the rotating cylinder 5 is sleeved on outside more driving bull sticks 2, and 5 inner wall of rotating cylinder is formed with internal tooth
And be engaged with multiple gears 6, every 2 both ends of driving bull stick are arranged with respectively between ring flange 1-2 and ring sealing plate 3
Two ring sealing plates 3 are covered to 5 corresponding end surface of rotating cylinder by the more pressure springs 4 and are compressed by pressure spring 4, in two ring sealing plates 3
Side surface and inner ring surface are provided with rubber mat 3-1, and more driving bull sticks 2 are partially respectively provided between corresponding two gears 6
For wire lever 2-1,7 gap setting of extruding water ring squeezes between 5 inner wall of rotating cylinder and horizontal 1 outer wall of smelting furnace body
Through-hole simultaneously fixture nut 7-2, the nut 7-2 and the lead screw is respectively set in water ring 7 and more 2 corresponding positions of driving bull stick
Bar 2-1 threaded one by one, squeezing 7 both side surface of water ring, along its circumferencial direction, angularly staggeredly perforation setting is multiple logical respectively
Water pipe head 7-1, the multiple outer end water flowing tube head 7-1 are obliquely installed to horizontal 1 outer wall of smelting furnace body, 5 outer wall system of rotating cylinder
There is a circle external tooth 5-1, the servo motor 8, which drives, to be had driving wheel 8-1 and is engaged with the circle external tooth 5-1 of rotating cylinder 5,
Servo motor 8 is connected and fixed by rack mounting plate 9 and the collet 1-1, and one of 3 outer surface of ring sealing plate is fixed to be connected
It is connected with water inlet pipe 3-2, the fixation of another 3 outer surface of ring sealing plate is communicated with drainpipe 3-3.
Specific embodiment 2: as shown in Figure 1, present embodiment is made furtherly to specific embodiment one
Bright, the transmission ratio of the driving wheel 8-1 and gear 6 is 1 ﹕ 1.
Specific embodiment 3: as shown in Figure 1, present embodiment is made furtherly to specific embodiment one
Bright, 8 outer cup of servo motor is equipped with caisson.
Specific embodiment 4: as shown in Figure 1 to 4, present embodiment discloses described in a kind of specific embodiment one
A kind of smelting furnace heat exchange cooling device operating method, the operating method includes the following steps:
Step 1: previously according to 7-2, nut of the wire lever 2-1 rotation angle measurement extruding water ring 7 of driving bull stick 2
Distance is moved, carries out driving the total of bull stick 2 when single direction stroke between multiple gears 6 at both ends to calculate and squeeze water ring 7
Rotate angle；
Step 2: in conjunction with the internal tooth of 5 inner wall of rotating cylinder and the transmission ratio of gear 6, when calculating extruding 7 single direction stroke of water ring
Total rotation angle of rotating cylinder 5 determines in conjunction with the transmission ratio of circle an external tooth 5-1 and driving wheel 8-1 of 5 outer wall of rotating cylinder and squeezes spray
Total rotation angle of driving wheel 8-1 when 7 single direction stroke of water ring；
Step 3: water inlet pipe 3-2 is connect with external cooling water supply pipeline, drainpipe 3-3 and externally drained pipeline connect
It connects, fills cooling water in rotating cylinder 5, drive driving wheel 8-1 positive and negative by programming Control servo motor 8 according to above-mentioned calculated result
Alternate rotation squeezes spray so that extruding water ring 7 be made to move back and forth between 5 inner wall of rotating cylinder and horizontal 1 outer wall of smelting furnace body
7 both side surface of water ring, which staggeredly penetrates through, is arranged multiple water flowing tube head 7-1, and the outer end water flowing tube head 7-1 is to horizontal smelting furnace sheet
1 outer wall of body is obliquely installed, and cooling water can be squeezed by squeezing in 7 reciprocating movement of water ring, and cooling water is through water flowing tube head
7-1, which is injected on horizontal 1 outer wall of smelting furnace body, combines flow of cooling water to realize heat exchange.
Shown in referring to Fig.1, close to multiple gears 6 of one end when squeezing 7 initial position of water ring, water inlet pipe 3-2 and external
The connection of cooling water supply pipeline, drainpipe 3-3 are connect with externally drained pipeline, and cooling water is filled in rotating cylinder 5, start servo motor
8 driving driving wheel 8-1, driving wheel 8-1 control rotating cylinder 5 by a circle external tooth 5-1 of engagement and rotate, and the internal tooth drive of rotating cylinder 5 is nibbled
The multiple gears 6 closed rotate, and multiple gears 6 drive more driving bull sticks 2 to rotate, due to being wire lever 2-1 among driving bull stick 2
It with the nut 7-2 threaded for squeezing water ring 7, squeezes water ring 7 and is displaced along more driving bull sticks 2, until close to another
It is single direction stroke when multiple gears 6 at end, it is assumed that servo motor 8 rotates forward 3600 ° at this time, then servo motor 8 inverts 3600 ° again and squeezes
It presses water ring 7 to return to initial position, constitutes primary reciprocating movement, servo motor 8 is squeezed by the above-mentioned steering angle of program cycles
Water ring 7 can be moved back and forth repeatedly, be squeezed in reciprocating movement cooling water, and cooling water is made to pass through water flowing
Tube head 7-1 is injected on horizontal 1 outer wall of smelting furnace body and carries out heat exchange cooling, takes away horizontal smelting furnace body by the flowing of water
1 heat, path section can be respectively set in driving 2 both ends of bull stick and ring flange 1-2 is rotatablely connected, and pressure spring 4 provides resilient support will
Ring sealing plate 3 is covered to 5 corresponding end surface of rotating cylinder and is compressed, and 3 inner surface of ring sealing plate and inner ring surface are provided with rubber mat 3-1, respectively
Gap between 5 end face of rotating cylinder and horizontal smelting furnace body 1 is sealed, passes through sealing between ring sealing plate 3 and driving bull stick 2
Circle sealing, avoids cooling water from flowing out.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in the form of others dress body.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that by all in the meaning and scope for the condition of equivalent for falling in claim
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (4)
- The cooling device 1. a kind of smelting furnace exchanges heat, including horizontal smelting furnace body (1), horizontal smelting furnace body (1) shape For there are two horizontally disposed round can shapes and the fixation of its bottom both ends collet (1-1), it is characterised in that: the smelting furnace heat exchange is cold But device further includes rotating cylinder (5), squeezes water ring (7), servo motor (8), two ring sealing plates (3), more driving bull sticks (2), more pressure springs (4) and multiple gears (6), horizontal smelting furnace body (1) outer wall head and the tail both ends are coaxially fixed, and there are two methods Blue disk (1-2), is along the circumferential direction angularly equipped with more driving bull sticks (2) between described two ring flanges (1-2), and described two Perforation and fixed seal ring, two annular envelopes are respectively set in a ring sealing plate (3) and more driving bull sticks (2) corresponding position Plate (3) is sleeved on more driving bull sticks (2) and is respectively adjacent on the inside of two ring flanges (1-2), every driving bull stick (2) both ends It is coaxially fixed with respectively gear (6) on the inside of adjacent rings sealing plate (3), the rotating cylinder (5) is sleeved on more driving bull sticks (2) outside Portion, rotating cylinder (5) inner wall are formed with internal tooth and are engaged with multiple gears (6), and every driving bull stick (2) both ends are located at ring flange Pressure spring (4) are arranged between (1-2) and ring sealing plate (3) respectively, by the more pressure springs (4) by two ring sealing plates (3) It covers and compresses to rotating cylinder (5) corresponding end surface, two ring sealing plate (3) inner surfaces and inner ring surface are provided with rubber mat (3-1), more Root driving bull stick (2) is partially disposed as wire lever (2-1) between corresponding two gears (6), the extruding water ring (7) gap setting squeezes water ring (7) and turns with more drivings between rotating cylinder (5) inner wall and horizontal smelting furnace body (1) outer wall Bar (2) corresponding position is respectively set through-hole and fixture nut (7-2), the nut (7-2) and the wire lever (2-1) spiral shell one by one Cooperation is connect, squeezing water ring (7) both side surface, angularly staggeredly multiple water flowing tube head (7- are arranged in perforation along its circumferencial direction respectively 1), the multiple water flowing tube head (7-1) outer end is obliquely installed to horizontal smelting furnace body (1) outer wall, and rotating cylinder (5) outer wall is formed with One circle external tooth (5-1), servo motor (8) driving have driving wheel (8-1) and circle external tooth (5-1) with rotating cylinder (5) It is engaged, servo motor (8) is connected and fixed by rack mounting plate (9) with the collet (1-1), one of ring sealing plate (3) outer surface fixation is communicated with water inlet pipe (3-2), and the fixation of another ring sealing plate (3) outer surface is communicated with drainpipe (3- 3)。
- The cooling device 2. a kind of smelting furnace according to claim 1 exchanges heat, it is characterised in that: the driving wheel (8-1) with The transmission ratio of gear (6) is 1 ﹕ 1.
- The cooling device 3. a kind of smelting furnace according to claim 1 exchanges heat, it is characterised in that: the servo motor (8) is outside Portion is covered with caisson.
- 4. a kind of operating method of smelting furnace heat exchange cooling device according to claim 1, it is characterised in that: the operation Method includes the following steps:Step 1: the nut (7- of water ring (7) is squeezed previously according to wire lever (2-1) rotation angle measurement of driving bull stick (2) 2) shift length turns to calculate and squeeze driving when water ring (7) carry out single direction stroke between multiple gears (6) at both ends Total rotation angle of bar (2)；Step 2: it in conjunction with the internal tooth of rotating cylinder (5) inner wall and the transmission ratio of gear (6), calculates and squeezes water ring (7) single direction stroke When rotating cylinder (5) total rotation angle, in conjunction with rotating cylinder (5) outer wall one circle external tooth (5-1) and driving wheel (8-1) transmission ratio, Determine total rotation angle of driving wheel (8-1) when squeezing water ring (7) single direction stroke；Step 3: water inlet pipe (3-2) is connect with external cooling water supply pipeline, drainpipe (3-3) and externally drained pipeline connect It connects, fills cooling water in rotating cylinder (5), driving wheel (8- is driven by programming Control servo motor (8) according to above-mentioned calculated result 1) positive and negative alternate rotates, to keep extruding water ring (7) past between rotating cylinder (5) inner wall and horizontal smelting furnace body (1) outer wall Multiple mobile, squeezing water ring (7) both side surface, staggeredly multiple water flowing tube heads (7-1) are arranged in perforation, and water flowing tube head (7-1) is outside End is obliquely installed to horizontal smelting furnace body (1) outer wall, and cooling water can be carried out by squeezing in water ring (7) reciprocating movement It squeezes, cooling water is injected on horizontal smelting furnace body (1) outer wall through water flowing tube head (7-1) combines flow of cooling water realization to change Heat.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910816587.6A CN110514018B (en) | 2019-08-30 | 2019-08-30 | Smelting furnace heat exchange cooling device and operation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910816587.6A CN110514018B (en) | 2019-08-30 | 2019-08-30 | Smelting furnace heat exchange cooling device and operation method |
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| Publication Number | Publication Date |
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| CN110514018A true CN110514018A (en) | 2019-11-29 |
| CN110514018B CN110514018B (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910816587.6A Active CN110514018B (en) | 2019-08-30 | 2019-08-30 | Smelting furnace heat exchange cooling device and operation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112985095A (en) * | 2021-04-27 | 2021-06-18 | 黄宇 | Environment-friendly treatment method for recycling high-temperature boiler slag |
| CN113686158A (en) * | 2021-08-24 | 2021-11-23 | 江西荧光磁业有限公司 | Intelligent cooling device of magnetic steel sintering furnace |
| CN114131165A (en) * | 2021-12-13 | 2022-03-04 | 长沙湘峰机械有限公司 | Welding processing device and processing technology for large-diameter thick-wall smelting furnace |
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| CN206944732U (en) * | 2017-07-14 | 2018-01-30 | 谭作元 | Cold ash bucket |
| CN108050849A (en) * | 2018-01-18 | 2018-05-18 | 江苏三井环保股份有限公司 | Cool down kiln |
| CN109237969A (en) * | 2018-09-16 | 2019-01-18 | 中国蓝星哈尔滨石化有限公司 | A kind of industrial chemicals cooling device and cooling means |
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| CN206771395U (en) * | 2017-05-24 | 2017-12-19 | 杭州江东富丽达热电有限公司 | A kind of circulating line cooling device |
| CN206944732U (en) * | 2017-07-14 | 2018-01-30 | 谭作元 | Cold ash bucket |
| CN108050849A (en) * | 2018-01-18 | 2018-05-18 | 江苏三井环保股份有限公司 | Cool down kiln |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112985095A (en) * | 2021-04-27 | 2021-06-18 | 黄宇 | Environment-friendly treatment method for recycling high-temperature boiler slag |
| CN113686158A (en) * | 2021-08-24 | 2021-11-23 | 江西荧光磁业有限公司 | Intelligent cooling device of magnetic steel sintering furnace |
| CN114131165A (en) * | 2021-12-13 | 2022-03-04 | 长沙湘峰机械有限公司 | Welding processing device and processing technology for large-diameter thick-wall smelting furnace |
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| CN110514018B (en) | 2020-11-24 |
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