CN111854289A - Water cooling device for safety production of aluminum products - Google Patents
Water cooling device for safety production of aluminum products Download PDFInfo
- Publication number
- CN111854289A CN111854289A CN202010676111.XA CN202010676111A CN111854289A CN 111854289 A CN111854289 A CN 111854289A CN 202010676111 A CN202010676111 A CN 202010676111A CN 111854289 A CN111854289 A CN 111854289A
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- Prior art keywords
- water
- box
- fixedly connected
- rotating shaft
- aluminum products
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 238000001816 cooling Methods 0.000 title claims abstract description 56
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 239000012535 impurity Substances 0.000 claims abstract description 24
- 238000002360 preparation method Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 abstract description 10
- 239000003595 mist Substances 0.000 abstract description 7
- 239000000110 cooling liquid Substances 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D16/00—Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a water cooling device for safe production of aluminum products, which relates to the field of production and processing of aluminum products and aims to solve the problems that the conventional water cooling device for production of aluminum products cannot rapidly remove solid impurities generated by cooling liquid in cooling circulation and the cooling liquid cannot be fully sprayed on the surface of the aluminum products in a water mist mode. The invention not only can rapidly separate and treat solid impurities in water, but also can rapidly and fully cool the surface of the aluminum product in the form of water mist, and simultaneously can realize water recycling, simplify the production process and improve the overall production efficiency.
Description
Technical Field
The invention relates to the field of production and processing of aluminum products, in particular to a water cooling device for safe production of aluminum products.
Background
The liquid cooling device is a device which uses water as a circulating coolant and absorbs heat from a system to be discharged to the atmosphere so as to reduce the water temperature, wherein the liquid cooling is to generate steam by utilizing the cold and heat exchange after the water is in flowing contact with air, and the steam volatilizes and takes away the heat to achieve the purpose of evaporating and radiating.
The existing product production water cooling device is only used for carrying out simple physical cooling through a fan and a filling material, solid impurities generated in cooling circulation of liquid cannot be removed, once cooling water without the impurities is put into use again, the processing quality of the surface of a product can be reduced, and cooling liquid cannot be fully sprayed on the surface of an aluminum product in a water mist mode to quickly cool the aluminum product, so that the water cooling device for the safe production of the aluminum product is provided.
Disclosure of Invention
The invention provides a water cooling device for safe production of aluminum products, which solves the problems that the existing water cooling device for production of aluminum products can not rapidly remove solid impurities generated by cooling liquid in cooling circulation, and the cooling liquid can not be fully sprayed on the surfaces of the aluminum products in a water mist mode.
In order to achieve the purpose, the invention adopts the following technical scheme:
A water cooling device for the safe production of aluminum products comprises a base, wherein a power box is fixedly connected to the top of the left side of the base, a first sliding block is slidably connected to the top of the base, a double-shaft motor is fixedly connected to the top of the first sliding block, a first bevel gear is fixedly sleeved on an output shaft at the left end of the double-shaft motor, a first gear is fixedly sleeved on an output shaft at the right end of the double-shaft motor, a hydraulic cylinder is fixedly connected to the left side of the first sliding block, a second rotating shaft which is rotatably connected to the top of the base is arranged between the power box and the first sliding block, a second bevel gear is fixedly sleeved on the outer portion of the second rotating shaft, a reciprocating lead screw is fixedly connected to the top of the second rotating shaft, a thread sleeve is sleeved on the outer thread of the reciprocating lead screw, a sealing plug is fixedly, the top of the power box is fixedly connected with a water inlet box, the inside of the water inlet box is fixedly connected with a filter screen, the right side of the water inlet box is fixedly connected with a cooling box, the top of the cooling box is fixedly connected with a driving motor, an output shaft of the driving motor is fixedly connected with a third rotating shaft, the bottom of the third rotating shaft is fixedly connected with a rotating disc, a plurality of water outlet holes are formed in the rotating disc, a hot water tank is fixedly sleeved in the cooling box, a preparation tank is arranged below the hot water tank, a plurality of spray heads are welded at the bottom of the preparation tank, a fourth rotating shaft is rotatably connected with the left tank wall of the cooling box, a fan is fixedly sleeved at the right side of the fourth rotating shaft, a second gear is fixedly sleeved at the left side of the fourth rotating shaft, the first gear is in meshing transmission with the second gear, a placing box is fixedly connected at the right side of, the bottom fixedly connected with catch basin of placing the case, the left side fixedly connected with water pump of catch basin, the play water end fixedly connected with circulating pipe of water pump, the water inlet has been seted up at the top of case of intaking, the fixed cover of one end of circulating pipe is established in the inside of water inlet.
Preferably, the bottom of the second rotating shaft is rotatably connected with a ball bearing, and the ball bearing is fixedly connected inside the base.
Preferably, a first sliding groove is formed in the top of the base, and the sliding block is sleeved inside the first sliding groove in a sliding mode.
Preferably, an impurity outlet is formed in the wall of the left side of the power box, and an impurity output pipe is fixedly sleeved inside the impurity outlet.
Preferably, the bottom box wall of the impurity concentration box is provided with a movable hole, and the cross section of the outer wall of the threaded sleeve and the cross section of the inner wall of the movable hole are both of a square structure.
Preferably, the top of cooling box has seted up the guiding hole, the third pivot activity runs through the guiding hole, two ventilation holes have been seted up at the top of cooling box.
Preferably, a plurality of second sliding blocks are welded on the outer side of the rotary table along the circumferential direction, a second sliding groove is formed in the inner wall of the cooling box, and the second sliding blocks are slidably sleeved inside the second sliding groove.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can realize the rapid separation of solid impurities in water and the timely centralized collection and treatment of the solid impurities by installing the hydraulic cylinder, the double-shaft motor, the first bevel gear, the second rotating shaft, the threaded sleeve, the sealing plug and other structures, wherein the hydraulic cylinder is contracted to drive the double-shaft motor to move left, the output shaft of the double-shaft motor rotates to drive the first bevel gear to rotate, the first bevel gear is in meshing transmission with the second bevel gear, and then the second rotating shaft and the reciprocating screw rod are driven to rotate, thereby driving the threaded sleeve to move up and down and driving the sealing plug to move up.
2. The invention can quickly radiate heat of hot water by installing the structures of the driving motor, the turntable, the nozzle, the fan and the like, wherein the driving motor drives the turntable to rotate, the double-shaft motor drives the first gear to rotate, the first gear and the second gear are mutually meshed to drive the fan to rotate, the hot water after preliminary cooling is sprayed to the cooling box through the nozzle, and the fan directly blows water mist to the surface of an aluminum product in the storage box, so that the surface of the aluminum product can be quickly and fully cooled.
3. According to the invention, the water pump, the circulating water pipe and other structures are arranged, wherein water used for cooling the aluminum product enters the water collecting tank through the water falling hole at the bottom of the storage tank, and hot water enters the water inlet tank again through the circulating water pipe by the operation of the water pump, so that the water recycling is realized, the production process is simplified, and the overall production efficiency is improved.
In conclusion, the device is novel in design, and easy operation not only can the rapid separation with handle aquatic solid impurity, can also fully cool down the aluminium product surface through the form of water smoke is quick, can also realize water cyclic utilization simultaneously, simplifies production process, has improved whole production efficiency.
Drawings
FIG. 1 is a schematic front view of a water cooling device for the safety production of aluminum products according to the present invention;
FIG. 2 is a schematic side view of a water cooling device for the safety production of aluminum products according to the present invention;
fig. 3 is a schematic top view of a turntable of a water cooling device for the safety production of aluminum products according to the present invention.
In the figure: 1 water inlet, 2 water inlet tanks, 3 circulating water pipes, 4 sealing covers, 5 impurity concentration tanks, 6 thread sleeves, 7 second bevel gears, 8 first bevel gears, 9 impurity output pipes, 10 reciprocating screw rods, 11 power boxes, 12 second rotating shafts, 13 hydraulic cylinders, 14 water outlet holes, 15 double-shaft motors, 16 first sliding blocks, 17 bases, 18 first sliding grooves, 19 second gears, 20 fourth rotating shafts, 21 water pumps, 22 water collecting tanks, 23 operating tables, 24 nozzles, 25 preparation tanks, 26 placing tanks, 27 rotating disks, 28 hot water tanks, 29 third rotating shafts, 30 cooling tanks, 31 driving motors, 32 filter screens, 33 first gears and 34 fans.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-3, a water cooling device for aluminum product safety production comprises a base 17, a power box 11 is fixedly connected to the top of the left side of the base 17, a first slider 16 is slidably connected to the top of the base 17, a double-shaft motor 15 is fixedly connected to the top of the first slider 16, a first bevel gear 8 is fixedly sleeved on the left end output shaft of the double-shaft motor 15, a first gear 33 is fixedly sleeved on the right end output shaft of the double-shaft motor 15, a hydraulic cylinder 13 is fixedly connected to the left side of the first slider 16, a second rotating shaft 12 rotatably connected to the top of the base 17 is arranged between the power box 11 and the first slider 16, a second bevel gear 7 is fixedly sleeved on the outside of the second rotating shaft 12, a reciprocating screw rod 10 is fixedly connected to the top of the second rotating shaft 12, a threaded sleeve 6 is sleeved on the outside of the reciprocating screw rod 10, a sealing plug 4 is fixedly connected to the top, the top of the power box 11 is fixedly connected with a water inlet box 2, the interior of the water inlet box 2 is fixedly connected with a filter screen 32, the right side of the water inlet box 2 is fixedly connected with a cooling box 30, the top of the cooling box 30 is fixedly connected with a driving motor 31, an output shaft of the driving motor 31 is fixedly connected with a third rotating shaft 29, the bottom of the third rotating shaft 29 is fixedly connected with a rotating disc 27, the rotating disc 27 is provided with a plurality of water outlet holes 14, the interior of the cooling box 30 is fixedly sleeved with a hot water tank 28, a preparation tank 25 is arranged below the hot water tank 28, the bottom of the preparation tank 25 is welded with a plurality of nozzles 24, the left side box wall of the cooling box 30 is rotatably connected with a fourth rotating shaft 20, the right side of the fourth rotating shaft 20 is fixedly sleeved with a fan 34, the left side of the fourth rotating shaft 20 is fixedly sleeved with a second gear 19, place the bottom inner wall fixedly connected with operation panel 23 of case 26, place the bottom fixedly connected with catch basin 22 of case 26, the left side fixedly connected with water pump 21 of catch basin 22, the play water end fixedly connected with circulating pipe 3 of water pump 21, water inlet 1 has been seted up at the top of case 2 of intaking, and the fixed cover of one end of circulating pipe 3 is established in the inside of water inlet 1.
In this embodiment, the bottom of the second rotating shaft 12 is rotatably connected with a ball bearing, and the ball bearing is fixedly connected inside the base 17.
In this embodiment, the top of the base 17 is provided with a first sliding groove 18, and the sliding block 16 is slidably sleeved inside the first sliding groove 18.
In this embodiment, impurity export has been seted up to the left side tank wall of headstock 11, and the fixed cover in inside of impurity export is equipped with impurity output tube 9.
In the embodiment, the box wall at the bottom of the impurity concentration box 5 is provided with a movable hole, and the cross section of the outer wall of the threaded sleeve 6 and the cross section of the inner wall of the movable hole are both of square structures.
In this embodiment, the top of the cooling box 30 is provided with a guide hole, the third rotating shaft 29 movably penetrates through the guide hole, and the top of the cooling box 30 is provided with two ventilation holes.
In this embodiment, a plurality of second sliding blocks are welded on the outer side of the rotating disc 27 along the circumferential direction, a second sliding groove is formed in the inner wall of the cooling box 30, and the second sliding blocks are slidably sleeved in the second sliding groove.
The working principle is that firstly, the output shaft of the double-shaft motor 15 rotates to drive the first gear 33 and the first bevel gear 8 to rotate, when hot water is cooled, the hydraulic cylinder 13 is stretched to drive the first gear 33 and the second gear 19 to be meshed for transmission, thereby driving the fourth rotating shaft 20 to rotate, thereby driving the fan 34 to rotate, the output shaft of the driving motor 31 rotates to drive the third rotating shaft 29 to rotate, thereby driving the rotating disc 27 to rotate, hot water enters the water inlet tank 2 through the water inlet 1, the hot water separates solid impurities through the filter screen 32, then the hot water enters the hot water tank 28, the rotating disc 27 rotates to stir the hot water to dissipate most of heat, then the water after the first temperature reduction enters the preparation tank 25 through the water outlet 14, the water falls in a water mist form through the spray head 24 below the preparation tank 25, the fan 34 rotates to blow water mist into the placing tank 26 to complete the cooling task, the water after cooling the aluminum product falls into the, then the water pump 21 sends hot water into the water inlet tank 2 again through the circulating water pipe 3, water recycling is realized, after the cooling task is completed, the hydraulic cylinder 13 contracts to drive the first slider 16 to move left, the meshing transmission of the first bevel gear 8 and the second bevel gear 7 is realized, then the second rotating shaft 12 is driven to rotate, so that the reciprocating screw rod 10 is driven to rotate, then the threaded sleeve 6 is driven to move up and down, so that the sealing cover is driven to move up and down, so that solid impurities fall into the impurity concentration tank 5, and the concentrated collection of the solid impurities is realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The water cooling device for the safety production of the aluminum products comprises a base (17) and is characterized in that a power box (11) is fixedly connected to the top of the left side of the base (17), a first sliding block (16) is slidably connected to the top of the base (17), a double-shaft motor (15) is fixedly connected to the top of the first sliding block (16), a first bevel gear (8) is fixedly arranged on a left-end output shaft of the double-shaft motor (15) in a fixed mode, a first gear (33) is fixedly sleeved on a right-end output shaft of the double-shaft motor (15), a hydraulic cylinder (13) is fixedly connected to the left side of the first sliding block (16), a second rotating shaft (12) rotatably connected to the top of the base (17) is arranged between the power box (11) and the first sliding block (16), a gear (7) is fixedly arranged on the outer portion of the second rotating shaft (12), and a second reciprocating screw rod (10) is fixedly, the external thread sleeve of the reciprocating screw rod (10) is provided with a thread sleeve (6), the top of the thread sleeve (6) is fixedly connected with a sealing plug (4), the internal fixed sleeve of the power box (11) is provided with an impurity concentration box (5), the top of the power box (11) is fixedly connected with a water inlet box (2), the internal fixed connection of the water inlet box (2) is provided with a filter screen (32), the right side of the water inlet box (2) is fixedly connected with a cooling box (30), the top of the cooling box (30) is fixedly connected with a driving motor (31), the output shaft of the driving motor (31) is fixedly connected with a third rotating shaft (29), the bottom of the third rotating shaft (29) is fixedly connected with a rotating disc (27), the rotating disc (27) is provided with a plurality of water outlet holes (14), and the internal fixed sleeve of the cooling box (30) is provided, a preparation pool (25) is arranged below the hot water pool (28), a plurality of spray heads (24) are welded at the bottom of the preparation pool (25), the left box wall of the cooling box (30) is rotatably connected with a fourth rotating shaft (20), a fan (34) is fixedly sleeved on the right side of the fourth rotating shaft (20), a second gear (19) is fixedly sleeved on the left side of the fourth rotating shaft (20), the first gear (33) and the second gear (19) are in meshed transmission, the right side of the cooling box (30) is fixedly connected with a placing box (26), the inner wall of the bottom of the placing box (26) is fixedly connected with an operating platform (23), the bottom of the placing box (26) is fixedly connected with a water collecting pool (22), the left side of the water collecting pool (22) is fixedly connected with a water pump (21), the water outlet end of the water pump (21) is fixedly connected with a circulating water pipe (3), and a water inlet (1) is formed in the, one end of the circulating water pipe (3) is fixedly sleeved inside the water inlet (1).
2. The water cooling device for the safety production of aluminum products as claimed in claim 1, wherein a ball bearing is rotatably connected to the bottom of the second rotating shaft (12), and the ball bearing is fixedly connected to the inside of the base (17).
3. The water cooling device for the safety production of the aluminum products as claimed in claim 1, wherein a first sliding groove (18) is formed at the top of the base (17), and the sliding block (16) is slidably sleeved inside the first sliding groove (18).
4. The water cooling device for the safety production of aluminum products as claimed in claim 1, wherein the left box wall of the power box (11) is provided with a foreign matter outlet, and a foreign matter outlet pipe (9) is fixedly sleeved inside the foreign matter outlet.
5. The water cooling device for the safety production of aluminum products as claimed in claim 1, wherein the bottom wall of the impurity concentration box (5) is provided with a movable hole, and the cross section of the outer wall of the threaded sleeve (6) and the cross section of the inner wall of the movable hole are both square structures.
6. The water cooling device for the safety production of aluminum products as claimed in claim 1, wherein a guide hole is formed in the top of the cooling box (30), the third rotating shaft (29) movably penetrates through the guide hole, and two vent holes are formed in the top of the cooling box (30).
7. The water cooling device for the safety production of aluminum products as claimed in claim 1, wherein a plurality of second sliding blocks are welded to the outer side of the rotating disc (27) along the circumferential direction, a second sliding groove is formed in the inner wall of the cooling box (30), and the second sliding blocks are slidably sleeved inside the second sliding groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010676111.XA CN111854289B (en) | 2020-07-14 | 2020-07-14 | Water cooling device for safety production of aluminum products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010676111.XA CN111854289B (en) | 2020-07-14 | 2020-07-14 | Water cooling device for safety production of aluminum products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111854289A true CN111854289A (en) | 2020-10-30 |
| CN111854289B CN111854289B (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010676111.XA Expired - Fee Related CN111854289B (en) | 2020-07-14 | 2020-07-14 | Water cooling device for safety production of aluminum products |
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| Country | Link |
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| CN (1) | CN111854289B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531969A (en) * | 2021-07-15 | 2021-10-22 | 广东海洋大学 | Glassware processing is with quick even cooling arrangement |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008105044A (en) * | 2006-10-24 | 2008-05-08 | Kanto Yakin Kogyo Co Ltd | Continuous furnace for brazing of aluminum product |
| CN208952758U (en) * | 2018-09-28 | 2019-06-07 | 江西飞翔实业有限公司 | One kind being used for aluminium alloy industrial water device for cooling |
| CN209459277U (en) * | 2018-11-15 | 2019-10-01 | 泰州华然不锈钢制品有限公司 | Cooling device is used in a kind of production and processing of flange |
| CN210359212U (en) * | 2019-07-05 | 2020-04-21 | 广西德骏门窗幕墙有限公司 | Water cooling device for aluminum alloy production |
| CN210856262U (en) * | 2019-10-16 | 2020-06-26 | 常州中赫新材料科技有限公司 | Novel annealing furnace with heat recovery function based on aluminum coil production |
-
2020
- 2020-07-14 CN CN202010676111.XA patent/CN111854289B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008105044A (en) * | 2006-10-24 | 2008-05-08 | Kanto Yakin Kogyo Co Ltd | Continuous furnace for brazing of aluminum product |
| CN208952758U (en) * | 2018-09-28 | 2019-06-07 | 江西飞翔实业有限公司 | One kind being used for aluminium alloy industrial water device for cooling |
| CN209459277U (en) * | 2018-11-15 | 2019-10-01 | 泰州华然不锈钢制品有限公司 | Cooling device is used in a kind of production and processing of flange |
| CN210359212U (en) * | 2019-07-05 | 2020-04-21 | 广西德骏门窗幕墙有限公司 | Water cooling device for aluminum alloy production |
| CN210856262U (en) * | 2019-10-16 | 2020-06-26 | 常州中赫新材料科技有限公司 | Novel annealing furnace with heat recovery function based on aluminum coil production |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531969A (en) * | 2021-07-15 | 2021-10-22 | 广东海洋大学 | Glassware processing is with quick even cooling arrangement |
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| CN111854289B (en) | 2021-08-31 |
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