CN105546992A - Industrial furnace with liftable dust-collecting furnace cover - Google Patents
Industrial furnace with liftable dust-collecting furnace cover Download PDFInfo
- Publication number
- CN105546992A CN105546992A CN201610096065.XA CN201610096065A CN105546992A CN 105546992 A CN105546992 A CN 105546992A CN 201610096065 A CN201610096065 A CN 201610096065A CN 105546992 A CN105546992 A CN 105546992A
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- China
- Prior art keywords
- gas approach
- flue
- flue gas
- gas
- bell
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Classifications
-
- 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
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/18—Door frames; Doors, lids, removable covers
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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
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
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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
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/18—Door frames; Doors, lids, removable covers
- F27D1/1808—Removable covers
- F27D2001/1825—Means for moving the cover
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Coke Industry (AREA)
Abstract
The invention relates to an industrial furnace with a liftable dust-collecting furnace cover. The industrial furnace comprises a furnace body, the furnace cover, and a lifting mechanism for lifting the furnace cover, wherein a semienclosed cavity is formed on the inner wall of the furnace cover; a salt adding passage is formed in the top of the furnace cover; a first flue gas inlet, a second flue gas inlet and a flue gas outlet which are communicated with the inside of a fixed flue gas pipeline are formed in the fixed flue gas pipeline; the flue gas outlet is connected with a flue gas pumping device; the end part of a movable flue gas pipeline can move up and down along the outer wall of the fixed flue gas pipeline; the salt adding passage is communicated with the first flue gas inlet or the second flue gas inlet through the movable flue gas pipeline; a crucible is arranged at the inner part of the furnace body; the height difference of the first flue gas inlet and the second flue gas inlet meets the condition that when the furnace cover is opened, a workpiece to be processed can be hung into the crucible. The condition of interference generated in materials and the furnace cover when the workpiece is hung into the furnace body is avoided, flue gas dispersed in the furnace body can be concentrated and pumped no matter whether the furnace cover is opened or closed, the workshop environment can be improved, and the health of workers are benefited.
Description
Technical field
The present invention relates to technical field of heat treatment, particularly relate to a kind of industrial furnace with liftable dust suction bell.
Background technology
In technical field of heat treatment, the collection discharge of flue dust is one of important step in production technology.As shown in Figure 1, bell 1 ˊ of existing heat-treatment furnace is arranged on the top of fire door, driven by elevating mechanism and rotatably open or close, carry out salt adding opening bell 1 ˊ, when hanging in or hang out workpiece, producing the toxic gas such as a large amount of flue gases and dust in body of heater 2 ˊ can directly diffuse in workshop, although diffuse to the air exhaust passage discharge that the toxic gas in workshop is arranged finally by top, workshop, but the currency of toxic gas in workshop is long, pollute Workshop Production environment, be unfavorable for that producers' is healthy, in addition, when hanging in or hang out workpiece, material frame often there will be and interferes with bell and the problem that cannot put into, hinder manufacturing schedule, and cannot be applied in heat-treatment production line, the scope of application is limited to.
Summary of the invention
The object of the invention is for the deficiencies in the prior art part, a kind of industrial furnace with liftable dust suction bell is provided, realizing bell opening or closing Shi Junneng carries out centralized collection purification to the flue gas spread in body of heater, reasonable in design, optimizes Workshop Production environment.
Technology solution of the present invention is as follows:
A kind of industrial furnace with liftable dust suction bell, comprise body of heater, be arranged on bell that the fire door of body of heater can open or close and the hoisting mechanism for promoting furnace cover lifting, the inwall of described bell is formed with semi-enclosed cavity, bell top be provided with communicate with described cavity add salt passage, it is characterized in that: also comprise the fixing flue being vertically arranged on body of heater side and be fixedly communicated with one end the movable flue adding salt passage, described fixing flue offers the first gas approach communicated with its inside, second gas approach and exhanst gas outlet, this exhanst gas outlet is connected with fume extracting device, the end of described movable flue can move up and down along the outer wall fixing flue, adds salt passage and is connected with the first gas approach or the second gas approach by this movable flue, described furnace interior is provided with crucible, and the difference in height of the first gas approach and the second gas approach meets bell when opening, and pending workpiece hangs in described crucible.
As improvement, the end of described movable flue is convexly equipped with slide block, and the outer wall of fixing flue is vertically provided with the slideway suitable with described slide block, and this slide block all can airtightly be connected with described first gas approach and the second gas approach.
As improvement, the first proximity switch and the second proximity switch is had respectively in described first gas approach and the second gas approach, first proximity switch is arranged near the first gas approach lower position, and the second proximity switch is arranged near the second gas approach top position.
As improvement, described exhanst gas outlet is at least one, and this exhanst gas outlet is all connected with the second gas approach with described first gas approach.
As improvement, in described slideway, be provided with the first baffle plate and second baffle that are used to open or close described first gas approach and the second gas approach.
As improvement, the top vertical of described first baffle plate is provided with the first coil tension spring, and the bottom of second baffle is vertically provided with the second coil tension spring, and the end of this first coil tension spring and the second coil tension spring is all installed on fixing flue.
First baffle plate and second baffle utilize the elastic force effect of simple coil tension spring, realize opening or closing to corresponding gas approach, change the circulation path that in body of heater, flue gas is drawn, all can carry out concentrating suction to the flue gas of diffusion to meet when bell opens or closes state.
As improvement, described first gas approach and the second gas approach arrange from top to bottom and are all positioned at described slideway, and described first baffle plate is consistent with the degree of depth of described slideway with the thickness of second baffle.
As improvement, described exhanst gas outlet is positioned at the below of the second gas approach, and is airtightly connected with fume dust remover, and fume extracting device is connected with the gas outlet of fume dust remover.
As improvement, in described cavity, be provided with the dividing plate that edge is all connected with bell inwall, be provided with in the middle part of this dividing plate with add that salt passage communicates lead salt hole, be evenly equipped with some gas ports along leading around salt hole.
As improvement, described hoisting mechanism comprises chain, sprocket wheel, frame and lift cylinder, the end of chain is fixedly connected with the top of bell, chain is two, itself and movable flue form three bell suspension centres, bell is elevated by chain-driving, and by the outer wall rectilinear motion of its upper movable flue arranged along fixing flue, and effectively increase bell moves up and down the stationarity of process.
Beneficial effect of the present invention is:
(1) the present invention changes the mode opened or closed of traditional bell rotary type, hoisting mechanism is utilized to make bell realize the unfolding mode of upper and lower separate type, the situation that when avoiding hanging in workpiece toward body of heater, material tool and bell interfere, under ingehious design in conjunction with flue and the coordinated effect at fume extracting device, realize bell open or close Shi Junneng to the flue gas spread in body of heater carry out concentrate suction, improve workshop condition, be beneficial to workman healthy;
(2) movable flue realizes linear slide by the slide block that its end is arranged with the chute on fixing flue and coordinates, and bell is driven in lifting process at hoisting mechanism, can not wave, rock, operate steadily;
(3) two gas approach all communicate with same exhanst gas outlet, the mating reaction of utilization activity flue and the first baffle plate and second baffle, make movable flue along with the lifting moving of bell is to the gas approach place of relevant position, the baffle plate then matched with this gas approach is opened, another gas approach is by the flapper closure matched, open or close action synchronous matching with bell, mechanism simplifying, reduce costs.
In sum, it is simple that the present invention has structure, and number of devices is few, and suction effect is good, and operating efficiency is high, energy consumption and low cost and other advantages.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described further:
Fig. 1 is the mounting structure schematic diagram of a kind of heat-treatment furnace bell in prior art;
Fig. 2 is the structural representation of bell of the present invention when being in open mode;
Fig. 3 is the enlarged diagram at A place in Fig. 2;
Fig. 4 is the structural representation of bell of the present invention when being in closed condition;
Fig. 5 is the enlarged diagram at B place in Fig. 4;
Fig. 6 is the enlarged diagram at C place in Fig. 4;
Fig. 7 is the bell flue gas of diffusion and circulation path schematic diagram of dust in body of heater when being in open mode;
Fig. 8 is the bell flue gas of diffusion and circulation path schematic diagram of dust in body of heater when being in closed condition.
Detailed description of the invention
Below in conjunction with accompanying drawing, the technical scheme in the embodiment of the present invention is illustrated clearly and completely.
Embodiment one
As shown in Figure 2, the invention provides a kind of industrial furnace with liftable dust suction bell, comprise body of heater 9, be arranged on bell 1 that the fire door of body of heater 9 can open or close and for promoting the hoisting mechanism 2 that bell 1 is elevated, the inwall of described bell 1 is formed with semi-enclosed cavity 11, bell 1 top be provided with communicate with described cavity 11 add salt passage 12, it is characterized in that: also comprise the fixing flue 3 being vertically arranged on body of heater 9 side and be fixedly communicated with one end the movable flue 4 adding salt passage 12, described fixing flue 3 offers the first gas approach 31 communicated with its inside, second gas approach 32 and exhanst gas outlet 33, this exhanst gas outlet 33 is connected with fume extracting device 5, the end of described movable flue 4 can move up and down along the outer wall fixing flue 3, add salt passage 12 to be connected with the first gas approach 31 or the second gas approach 32 by this movable flue 4, no matter bell 1 is being opened or closed condition, all the flue gas of diffusion in body of heater 9 is aspirated and concentrate through exhanst gas outlet 33 and draw, described first gas approach 31 and the second gas approach 32 are positioned at the homonymy of fixing flue 3, and it is setting up and down, described body of heater 9 inside is provided with crucible 91, the difference in height of the first gas approach 31 and the second gas approach 32 meets bell when opening, pending workpiece hangs in described crucible 91, can not interfere.Wherein, the import adding salt passage 12 in the present invention adopts water seal or sand seal.
As illustrated in figures 3-6, the end of described movable flue 4 is convexly equipped with slide block 41, the outer wall of fixing flue 3 is vertically provided with the slideway 34 suitable with described slide block 41, in this slideway 34, is also provided with the first baffle plate 6 and second baffle 7 that are used to open or close described first gas approach 31 and the second gas approach 32.Wherein, first gas approach 31 and the second gas approach 32 arrange from top to bottom and are all positioned at described slideway 34, the thickness of the first baffle plate 6, second baffle 7 and slide block 41 is all consistent with the degree of depth of described slideway 34, and slide block 41 all can airtightly be connected with described first gas approach 31 and the second gas approach 32, flue gas is avoided outwards to overflow from the first gas approach 31 and the second gas approach 32 edge.
In the present embodiment, the top vertical of described first baffle plate 6 is provided with the first coil tension spring 61, and the bottom of second baffle 7 is vertically provided with the second coil tension spring 71, and the end of this first coil tension spring 61 and the second coil tension spring 71 is all installed on fixing flue 3.First baffle plate 6 and second baffle 7 utilize the elastic force effect of simple coil tension spring, drive it to slide along in slideway 34, realize opening or closing the gas approach of relevant position.Simultaneously, the first proximity switch 35 and the second proximity switch 36 is had respectively in the first gas approach 31 and the second gas approach 32, first proximity switch 35 is arranged near the first gas approach 31 lower position, second proximity switch 36 is arranged near the second gas approach 32 top position, as long as guarantee that movable flue 4 is connected with the first gas approach 31 or the second gas approach 32, fume extracting device 5 will work always, until corresponding first gas approach 31 or the second gas approach 32 close by the first baffle plate 6 or second baffle 7 completely, reduce flue gas diffusion to the full extent.Described exhanst gas outlet 33 is at least one, and this exhanst gas outlet 33 is all connected with the second gas approach 32 with described first gas approach 31.
Described exhanst gas outlet 33 is positioned at the below of the second gas approach 32, and concentrated extraction employing exhanst gas outlet 33 of flue gas can be realized, and simplifies pipeline arrangement, saves artificial and production cost and convenient operation.In addition, this exhanst gas outlet 33 is airtight is connected with fume dust remover 8, fume extracting device 5 is connected with the gas outlet of fume dust remover 8, make flue gas before fume extracting device 5 is drawn, by fume dust remover 8, pre-removal of impurities process is carried out to the dust contained in flue gas, impurity etc., is beneficial to the process of flue gas subsequent purification on the one hand, improve purified treatment efficiency, on the other hand the impurity such as the dust in flue gas are reclaimed, be beneficial to resource reutilization.
Certainly, the first proximity switch 35 in the present invention and the second proximity switch 36 also available limit switch or pressure switch replace, its installation site can adjust according to path of motion, just starts working to realize only having the fume extracting device 5 when the first gas approach 31 or the second gas approach 32 are opened.
The dividing plate 13 that edge is all connected with bell 1 inwall is provided with in the cavity 11 of described bell 1, be provided with in the middle part of this dividing plate 13 with add that salt passage 12 keeps being communicated with lead salt hole 131, in order to improve fume collection efficiency, some gas ports 132 with adding salt passage 12 and being communicated with are evenly equipped with around salt hole 131 along leading, when bell 1 is opened, the flue gas produced in fume extracting device 5 pairs of bodies of heater and dust etc. carry out maximum suction, bell 1 edge forms pressure-fired, entering of effective prevention oxygen, simultaneously waste gas and flue gas are through the moment of gas port 132, its air-flow velocity increases instantaneously, waste gas and dust can be concentrated fast to enter and add in salt passage 12, draw through movable flue 4 and fixing flue 3 and carry out convergent evolution process, dust collection effect is good, operating efficiency is high.
In the present embodiment, described hoisting mechanism 2 comprises chain 21, sprocket wheel 22, frame and lift cylinder 23, the end of chain 21 is fixedly connected with the top of bell 1, wherein, chain 21 is two, and itself and movable flue 4 form three bell 1 suspension centres, and bell 1 drives lifting by chain 21, and by the outer wall linear movement of its upper movable flue 4 arranged along fixing flue 3, effectively increase bell 1 moves up and down the stationarity of process.
Operation principle:
As shown in Figure 7 and Figure 8, while hoisting mechanism 2 drives bell 1 to move up, the end of movable flue 4 synchronously moves up along the slideway 34 on fixing flue 3, when movable flue 4 is gradually away from the second flue dust import, second baffle 7 synchronous reset under the elastic force effect of the second coil tension spring 71, until seal airtight for the second flue dust import, the second proximity switch 36 sends instruction, and fume extracting device 5 quits work; When the slide block 41 of movable flue 4 promote the first baffle plate 6 move up time, first proximity switch 35 sends instruction, fume extracting device 5 is started working, now, the flue gas of diffusion in fume extracting device 5 pairs of bodies of heater 9 and dust etc. carry out maximum aspiration, concentrated the entering in movable flue 4 such as flue gas and dust enters in fixing flue 3 through the first gas approach 31, and extract out through exhanst gas outlet 33, now bell 1 is in open mode.
While bell 1 moves down, the end of movable flue 4 synchronously moves down along the slideway 34 on fixing flue 3, when movable flue 4 is gradually away from the first flue dust import, first baffle plate 6 is synchronous reset under the elastic force and self gravitation effect of the first coil tension spring 61, until seal airtight for the first flue dust import, first proximity switch 35 sends instruction, and fume extracting device 5 quits work; When the slide block 41 of movable flue 4 promote second baffle 7 move down time, second proximity switch 36 sends instruction, fume extracting device 5 is started working, now, the flue gas of diffusion in fume extracting device 5 pairs of bodies of heater 9 and dust etc. carry out maximum aspiration, concentrated the entering in movable flue 4 such as flue gas and dust enters in fixing flue 3 through the second gas approach 32, and extract out through exhanst gas outlet 33, now bell 1 is in closed condition.
According to above-described embodiment, in the present invention, movable flue 4 is along with the lifting synchronizing moving of bell 1 is to corresponding station, change the circulation path that in body of heater 9, flue gas is drawn, no matter all can aspirate the flue gas of diffusion and concentrate extraction when opening or closing state to realize bell 1, mechanism simplifying, suction effect is good, is beneficial to and improves workshop condition.
The above; be only and invent preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, be anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (9)
1. one kind has the industrial furnace of liftable dust suction bell, comprise body of heater (9), be arranged on bell (1) that the fire door of body of heater (9) can open or close and for promoting the hoisting mechanism (2) that bell (1) is elevated, the inwall of described bell (1) is formed with semi-enclosed cavity (11), bell (1) top be provided with communicate with described cavity (11) add salt passage (12), it is characterized in that: also comprise the fixing flue (3) being vertically arranged on body of heater (9) side and be fixedly communicated with one end the movable flue (4) adding salt passage (12), described fixing flue (3) offers the first gas approach (31) communicated with its inside, second gas approach (32) and exhanst gas outlet (33), this exhanst gas outlet (33) is connected with fume extracting device (5), the end of described movable flue (4) can move up and down along the outer wall fixing flue (3), adds salt passage (12) and is connected with the first gas approach (31) or the second gas approach (32) by this movable flue (4), described body of heater (9) inside is provided with crucible (91), the difference in height of the first gas approach (31) and the second gas approach (32) meets bell (1) when opening, and pending workpiece hangs in described crucible (91).
2. a kind of industrial furnace with liftable dust suction bell according to claim 1, it is characterized in that, the end of described movable flue (4) is convexly equipped with slide block (41), the outer wall of fixing flue (3) is vertically provided with the slideway (34) suitable with described slide block (41), and this slide block (41) all can airtightly be connected with described first gas approach (31) and the second gas approach (32).
3. a kind of industrial furnace with liftable dust suction bell according to claim 2, it is characterized in that, the first proximity switch (35) and the second proximity switch (36) is had respectively in described first gas approach (31) and the second gas approach (32), first proximity switch (35) is arranged near the first gas approach (31) lower position, and the second proximity switch (36) is arranged near the second gas approach (32) top position.
4. a kind of industrial furnace with liftable dust suction bell according to claim 3, it is characterized in that, described exhanst gas outlet (33) is at least one, and this exhanst gas outlet (33) is all connected with the second gas approach (32) with described first gas approach (31).
5. a kind of industrial furnace with liftable dust suction bell according to claim 3, it is characterized in that, in described slideway (34), be provided with the first baffle plate (6) and second baffle (7) that are used to open or close described first gas approach (31) and the second gas approach (32).
6. a kind of industrial furnace with liftable dust suction bell according to claim 5, it is characterized in that, the top vertical of described first baffle plate (6) is provided with the first coil tension spring (61), the bottom of second baffle (7) is vertically provided with the second coil tension spring (71), and the end of this first coil tension spring (61) and the second coil tension spring (71) is all installed on fixing flue (3).
7. a kind of industrial furnace with liftable dust suction bell according to claim 6, it is characterized in that, described first gas approach (31) and the second gas approach (32) arrange from top to bottom and are all positioned at described slideway (34), and described first baffle plate (6) is consistent with the degree of depth of described slideway (34) with the thickness of second baffle (7).
8. a kind of industrial furnace with liftable dust suction bell according to claim 7, it is characterized in that, described exhanst gas outlet (33) is positioned at the below of the second gas approach (32), and being airtightly connected with fume dust remover (8), fume extracting device (5) is connected with the gas outlet of fume dust remover (8).
9. a kind of industrial furnace with liftable dust suction bell according to claim 1, it is characterized in that, the dividing plate (13) that edge is all connected with bell (1) inwall is provided with in described cavity (11), this dividing plate (13) middle part be provided with add that salt passage (12) communicates lead salt hole (131), be evenly equipped with some gas ports (132) along leading around salt hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610096065.XA CN105546992B (en) | 2016-02-22 | 2016-02-22 | A kind of industrial furnace with liftable dust suction bell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610096065.XA CN105546992B (en) | 2016-02-22 | 2016-02-22 | A kind of industrial furnace with liftable dust suction bell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105546992A true CN105546992A (en) | 2016-05-04 |
| CN105546992B CN105546992B (en) | 2017-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610096065.XA Active CN105546992B (en) | 2016-02-22 | 2016-02-22 | A kind of industrial furnace with liftable dust suction bell |
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| Country | Link |
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| CN (1) | CN105546992B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106885469A (en) * | 2017-03-03 | 2017-06-23 | 杭州志在材料科技有限公司 | A kind of ceramic kiln with cooling control structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1019475A (en) * | 1996-06-28 | 1998-01-23 | Osamu Asai | Dust collecting device for melt furnace |
| CN202511615U (en) * | 2012-03-30 | 2012-10-31 | 中国有色金属工业第十四冶金建设公司 | Telescopic lifting furnace cover for electric arc melting furnace |
| CN203904440U (en) * | 2014-06-03 | 2014-10-29 | 浙江尚鼎工业炉有限公司 | Nitriding furnace |
| CN204574788U (en) * | 2015-05-19 | 2015-08-19 | 三祥新材股份有限公司 | A kind of high temperature melting furnace petticoat pipe retractor device |
| CN205505743U (en) * | 2016-02-22 | 2016-08-24 | 浙江尚鼎工业炉有限公司 | Industrial furnace with liftable dust absorption bell |
-
2016
- 2016-02-22 CN CN201610096065.XA patent/CN105546992B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1019475A (en) * | 1996-06-28 | 1998-01-23 | Osamu Asai | Dust collecting device for melt furnace |
| CN202511615U (en) * | 2012-03-30 | 2012-10-31 | 中国有色金属工业第十四冶金建设公司 | Telescopic lifting furnace cover for electric arc melting furnace |
| CN203904440U (en) * | 2014-06-03 | 2014-10-29 | 浙江尚鼎工业炉有限公司 | Nitriding furnace |
| CN204574788U (en) * | 2015-05-19 | 2015-08-19 | 三祥新材股份有限公司 | A kind of high temperature melting furnace petticoat pipe retractor device |
| CN205505743U (en) * | 2016-02-22 | 2016-08-24 | 浙江尚鼎工业炉有限公司 | Industrial furnace with liftable dust absorption bell |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106885469A (en) * | 2017-03-03 | 2017-06-23 | 杭州志在材料科技有限公司 | A kind of ceramic kiln with cooling control structure |
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| Publication number | Publication date |
|---|---|
| CN105546992B (en) | 2017-09-12 |
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Effective date of registration: 20191205 Address after: 314300, No. 97, Qinshan Road, Qinshan street, Haiyan County, Zhejiang, Jiaxing Patentee after: Jiaxing lechuang fastener Technology Co., Ltd Address before: 313100, Zhejiang, Huzhou Changxing County forest town industrial concentration area Patentee before: Zhejiang Shangding Industrial Furnace Co., Ltd. |
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