CN210826271U - Quenching and tempering floor furnace - Google Patents
Quenching and tempering floor furnace Download PDFInfo
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- CN210826271U CN210826271U CN201921150029.2U CN201921150029U CN210826271U CN 210826271 U CN210826271 U CN 210826271U CN 201921150029 U CN201921150029 U CN 201921150029U CN 210826271 U CN210826271 U CN 210826271U
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Abstract
The utility model relates to a quenching and tempering floor furnace, which is mainly used in the metal heat treatment industry and belongs to the heat treatment field. Quenching and tempering building stove, set up the tempering furnace in the quenching furnace top, the chimney export of quenching furnace and the air inlet UNICOM of tempering furnace. The quenching furnace and the tempering furnace are communicated, so that high-temperature flue gas discharged from the outlet of the chimney of the quenching furnace can be introduced into the tempering furnace through the air inlet of the tempering furnace to heat a tempering workpiece, and the purpose of secondary utilization of waste heat is achieved; through setting up the tempering furnace in the quenching furnace top, quenching furnace top and tempering furnace bottom are only equivalent to a partition wall between two furnace chambeies, just no longer outwards give off heat, and simultaneously, the whole tempering furnace is upwards being wrapped up to the steam that the surface gived off around the quenching furnace below, also can reduce giving off of tempering furnace surface heat. Through the utility model discloses can make heat utilization rate improve, the energy saving consumes, both reduced manufacturing cost, play the effect of protection atmospheric environment again.
Description
Technical Field
The utility model relates to a quenching and tempering floor furnace, which is mainly used in the metal heat treatment industry and belongs to the heat treatment field.
Background
The temperature of a heating furnace used for metal quenching is generally about 870 ℃, and the temperature of a tempering furnace is generally about 470 ℃. At present, heating furnaces and tempering furnaces for metal quenching generally adopt industrial gas furnaces, the working principle of the industrial gas furnaces is that high-pressure air is used for supporting combustion of high-pressure gas to generate heat, a large amount of tail gas is discharged, particularly, the temperature of the tail gas discharged by a box-type furnace is almost equal to the temperature of the furnace, and a large amount of heat is discharged out of the furnace along with the tail gas; in addition, the temperature difference between the surface temperature of the furnace body and the ambient temperature of the air is 40-45 ℃, so the surface of the furnace body can also dissipate heat, the total heat loss is generally 70-75%, namely the heat utilization rate really applied to the workpiece is only about 25-30%, the great heat waste can be caused, and meanwhile, the discharged waste heat can cause serious pollution to the surrounding environment.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: overcomes the defects in the prior art, and provides a quenching and tempering floor furnace which has compact structure, can reduce the occupied area, can save energy, reduce the production cost and protect the atmospheric environment.
Quenching and tempering building stove, set up the tempering furnace in the quenching furnace top, the chimney export of quenching furnace and the air inlet UNICOM of tempering furnace.
The utility model discloses a set up the tempering furnace in the quenching furnace top, saved area, quenching furnace top and tempering furnace bottom only are equivalent to a partition wall between two furnace chambeies simultaneously, just no longer outwards give off the heat, and the whole tempering furnace is upwards being wrapped up to the steam that the surface gived off around the quenching furnace below moreover, also can reduce giving off of tempering furnace surface heat. In addition, the quenching furnace and the tempering furnace are communicated, and high-temperature flue gas discharged from the outlet of the chimney of the quenching furnace is introduced into the tempering furnace through the air inlet of the tempering furnace to heat the tempering workpiece, so that the purpose of secondary utilization of waste heat is achieved.
Through the structural design, the heat energy utilization rate can be improved to 37%, the energy consumption is saved by about 26%, the production cost is reduced, and the effect of protecting the atmospheric environment is achieved.
Wherein, the mode of UNICOM between quenching furnace chimney export and the tempering furnace air inlet two has following two kinds:
the first method is as follows:
the outlet of the chimney of the quenching furnace is arranged at the top of the quenching furnace chamber, the bottom of the tempering furnace is provided with an air inlet corresponding to the outlet of the chimney of the quenching furnace, the outlet of the chimney is directly communicated with the air inlet at the bottom of the tempering furnace, and high-temperature flue gas discharged from the chimney of the quenching furnace is directly discharged upwards into the tempering furnace.
The second method comprises the following steps:
the outlet of the chimney of the quenching furnace is arranged on the furnace wall on any side of the quenching furnace cavity, the furnace wall of the tempering furnace is provided with an air inlet corresponding to the outlet of the chimney of the quenching furnace, the outlet of the chimney is communicated with the air inlet of the tempering furnace through a pipeline, and high-temperature flue gas discharged from the chimney of the quenching furnace is discharged into the tempering furnace through a pipeline.
The quenching furnace of the utility model preferably adopts the following structural form:
the lower part of the quenching furnace is provided with a first heat-conducting plate, the inner cavity of the quenching furnace body is divided into an upper quenching hearth and a lower quenching combustion chamber by the first heat-conducting plate, the first heat-conducting plate is provided with a plurality of first through holes, and the quenching nozzles are arranged on the furnace walls at two sides of the quenching combustion chamber.
The quenching furnace is characterized in that a quenching combustion chamber and a first heat conducting plate are additionally arranged at the bottom of the quenching furnace, so that flame is not directly sprayed into a quenching furnace chamber but sprayed into the quenching combustion chamber through a quenching burner, the flame sprayed out at a high speed forms strong convection in a limited space of the quenching combustion chamber and is rapidly stirred with air in the quenching combustion chamber, high-temperature flame airflow at about two thousand degrees is rapidly mixed with low-temperature airflow in the quenching combustion chamber for uniform heating, the pressing effect of the first heat conducting plate is added, the flame sprayed out by the quenching burner is prevented from directly and locally flowing upwards after entering the quenching furnace chamber, the flame uniformly flows upwards through a first through hole in the first heat conducting plate, meanwhile, part of heat can enter the quenching furnace chamber through radiation of the first heat conducting plate, and the temperature uniformity of different parts of the. In addition, all heat uniformly and upwards enters the quenching furnace from the bottom of the whole quenching furnace, the most reasonable heating principle that hot air flows upwards is applied, and the flame of the traditional industrial gas furnace does not directly enter the quenching furnace from the top or two sides of the quenching furnace or the local range of two sides of the bottom of the quenching furnace, so that the furnace temperature uniformity of different height positions of the vertical section of the quenching furnace in the design is ensured.
Through the structural improvement of the quenching furnace, the temperature difference of the furnace temperature can be kept within 10 ℃, the problem of non-uniform furnace temperature of the high-temperature quenching furnace is thoroughly solved, the metal heat treatment quality is improved, the rejection rate of heat treatment products is reduced, the energy consumption is saved, and the emission is reduced.
Preferably, the number of the quenching burners is multiple, and the plurality of quenching burners are uniformly distributed, so that air in the quenching combustion chamber is heated as uniformly as possible, and the uniformity of the furnace temperature is further improved.
In practical application, the first through holes are uniformly distributed on the first heat-conducting plate, so that air in the quenching combustion chamber uniformly enters the quenching hearth upwards through the first through holes formed in the first heat-conducting plate; the aperture of the through hole is 7-30 mm to guarantee the suppression effect of first heat-conducting plate to flame, avoid the direct local upward flow behind the quenching furnace of quenching nozzle spun flame entering. The first heat conducting plate is preferably made of a material with a heat conductivity coefficient not less than 30W/(m.K), and the heat can more uniformly enter the quenching furnace chamber through the radiation of the first heat conducting plate due to good heat conductivity, so that the temperature uniformity of different parts of the horizontal section of the quenching furnace chamber is ensured.
Further preferably, the quenching combustion chamber is divided into a plurality of combustion units by partition plates, each combustion unit is at least correspondingly provided with one quenching burner, each partition plate is provided with a heat circulation channel, and each combustion unit is communicated through each heat circulation channel. By providing a plurality of combustion units, the uniformity of air heating in the quenching combustion chamber can be further increased.
The utility model provides a following structural style is preferred to the tempering furnace:
the lower part of the tempering furnace is provided with a second heat-conducting plate, the inner cavity of the tempering furnace is divided into an upper tempering furnace chamber and a lower tempering combustion chamber by the second heat-conducting plate, the second heat-conducting plate is provided with a plurality of second through holes, and the tempering burner is arranged on the wall of the tempering combustion chamber.
Tempering combustion additionally arranged at bottom of tempering furnaceThe design concepts of the chamber, the second heat-conducting plate, the quenching combustion chamber at the bottom of the quenching furnace and the first heat-conducting plate are similar, the purpose is to fully and effectively utilize heat energy, reduce energy consumption and save energy, and simultaneously improve the uniformity of the furnace temperature of the tempering furnace so as to uniformly heat a tempered workpiece, but the structure of the tempering combustion chamber is different from that of the quenching combustion chamber, the tempering combustion chamber is not required to be separated by a partition plate, and only a tempering nozzle with low power is arranged in the tempering combustion chamber to adjust and control the furnace temperature of the tempering furnace. The total power of the common traditional box-type tempering furnace burners is 1/2 of the total power of the quenching furnace burners, and the total power is 2-20 m3The unequal furnace volume of size in the scope corresponds and selects the nozzle total power in 15 ~ 150 ten thousand big calories per hour within range, and the utility model discloses tempering furnace nozzle total power only need 4 ~ 40 ten thousand big calories per hour can.
Preferably, a stirring fan is arranged in the tempering furnace chamber, so that the convection of the atmosphere in the furnace can be formed, the circulation frequency of the atmosphere in the furnace is more than 50 times/min, and the temperature in the furnace is uniform.
Preferably, the tail of a flue of the tempering furnace is connected with a flue gas side inlet of the air preheater, an air side outlet of the air preheater is connected with a combustion air main pipe, the combustion air main pipe is connected with a combustion air pipeline of the quenching furnace and a combustion air pipeline of the tempering furnace, the combustion air pipeline of the quenching furnace is connected into the quenching burner, the combustion air pipeline of the tempering furnace is connected into the tempering burner, the third utilization of the waste heat of the quenching furnace is equivalent to the third utilization of the waste heat of the quenching furnace, and the energy-saving effect is further improved.
Compared with the prior art, the utility model beneficial effect who has is:
1. the utility model discloses a set up the tempering furnace in the quenching furnace top, saved area, quenching furnace top and tempering furnace bottom only are equivalent to a partition wall between two furnace chambeies simultaneously, just no longer outwards give off the heat, and the whole tempering furnace is upwards being wrapped up to the steam that the surface gived off around the quenching furnace below moreover, also can reduce giving off of tempering furnace surface heat. In addition, the quenching furnace and the tempering furnace are communicated, and high-temperature flue gas discharged from the outlet of the chimney of the quenching furnace is introduced into the tempering furnace through the air inlet of the tempering furnace to heat the tempering workpiece, so that the purpose of secondary utilization of waste heat is achieved. Therefore, about 35 percent of energy can be saved, the production cost is reduced, and the atmospheric environment is protected;
2. the tail part of the flue of the tempering furnace is connected with an air preheater, so that the waste heat of the tail gas discharged from the flue of the tempering furnace is used for heating the combustion-supporting air of the quenching furnace and the tempering furnace through the air preheater, and the waste heat is reused, thereby further improving the energy-saving effect;
3. the design of the heat conducting plate at the bottom of the quenching furnace and the tempering furnace and the combustion chamber ensures that heat energy can be fully and effectively utilized, the effects of reducing energy consumption and saving energy can be achieved, the uniformity of the furnace temperature of the quenching furnace and the tempering furnace can be improved, the problem of non-uniform furnace temperature of the quenching furnace and the tempering furnace is thoroughly solved, the metal heat treatment quality is improved, and the rejection rate of heat treatment products is reduced.
Drawings
FIG. 1 is a schematic structural diagram of the first embodiment;
FIG. 2 is an overall structural view of the first embodiment;
fig. 3 is a schematic structural diagram of the second embodiment.
In the figure: 1. a quenching furnace; 2. quenching the furnace door; 3. quenching the hearth; 4. a first heat-conducting plate; 5. a first through hole; 6. a heat flow channel; 7. a partition plate; 8. burning a nozzle; 9. a combustion unit; 10. a combustion-supporting air pipeline of the quenching furnace; 11. a combustion air line of the tempering furnace; 12. a combustion air main; 13. a flue gas side outlet; 14. an air preheater; 15. an air side inlet; 16. a flue; 17. a stirring fan; 18. tempering furnace; 19. a tempering furnace door; 20. tempering the hearth; 21. a second heat-conducting plate; 22. a second through hole; 23. tempering the burner; 24. a tempering combustion chamber; 25. an air inlet; 26. a chimney; 27. a pipeline.
Detailed Description
Embodiments of the present invention are further described below with reference to the accompanying drawings:
the first embodiment is as follows:
as shown in fig. 1 and 2, in the quenching and tempering building furnace of the present embodiment, the tempering furnace 18 is disposed at the top of the quenching furnace 1, the outlet of the chimney 26 of the quenching furnace 1 is disposed at the top of the quenching furnace chamber 3, the bottom of the tempering furnace 18 is provided with an air inlet 25 corresponding to the outlet of the chimney 26 of the quenching furnace 1, and the outlet of the chimney 26 is directly connected to the air inlet 25 at the bottom of the tempering furnace 18.
By arranging the tempering furnace 18 at the top of the quenching furnace 1, the occupied area is saved; the quenching furnace 1 is communicated with the tempering furnace 18, so that high-temperature flue gas discharged from the outlet of a chimney 26 of the quenching furnace 1 can flow upwards to an air inlet 25 at the bottom of the tempering furnace 18, and all tail gas waste heat in the quenching furnace 1 is discharged into the tempering furnace 18 to heat a tempering workpiece, thereby achieving the purpose of secondary utilization of the waste heat.
The arrows in the figure indicate the direction of heat flow.
In the embodiment, the first heat conducting plate 4 is arranged at the lower part of the quenching furnace 1, the inner cavity of the quenching furnace 1 is divided into an upper quenching hearth 3 and a lower quenching combustion chamber by the first heat conducting plate 4, the first heat conducting plate 4 is made of a material with a heat conductivity coefficient not less than 30W/(m.K), and a silicon carbide material is adopted in the embodiment, so that the quenching furnace has the advantages of low cost, high heat conductivity coefficient, high temperature resistance of 1550 ℃, higher high-temperature strength, high hardness and high wear resistance compared with the conventional heat-resistant steel; the first heat conducting plate 4 is provided with a plurality of first through holes 5, and the first through holes 5 are uniformly distributed on the first heat conducting plate, so that air in the quenching combustion chamber uniformly enters the quenching furnace chamber upwards through the first through holes 5 formed in the first heat conducting plate 4, wherein the aperture of the first through holes 5 is 15 mm; the quenching combustion chamber is divided into a plurality of combustion units 9 by partition plates 7, each partition plate 7 is provided with a heat circulation channel 6, each combustion unit 9 is communicated through each heat circulation channel 6, a burner 8 is arranged in each combustion unit 9, and a combustion-supporting air pipeline 10 of the quenching furnace is respectively connected into each combustion unit 9; a plurality of quenching nozzles 8 are uniformly distributed on the side wall of the quenching combustion chamber; the quenching furnace door 2 is arranged on one side surface of the quenching furnace chamber 3.
By additionally arranging the quenching combustion chamber and the first heat-conducting plate 4 at the bottom of the quenching furnace 1, flame is not directly sprayed into the quenching combustion chamber 3 but sprayed into the quenching combustion chamber through the quenching burner 8, the flame sprayed out at high speed forms strong convection in the limited space of the quenching combustion chamber separated by the first heat-conducting plate 4 and is rapidly stirred with air in the quenching combustion chamber, so that high-temperature flame airflow of about two thousand degrees is rapidly mixed and uniformly heated with low-temperature airflow in the quenching combustion chamber, and the pressing action of the first heat-conducting plate 4 is added, so that the flame sprayed out by the quenching burner 8 is prevented from directly flowing upwards locally after entering the quenching combustion chamber 3, but uniformly flows upwards through the first through holes 5 uniformly distributed on the first heat-conducting plate 4 of the whole furnace bottom, meanwhile, the first heat-conducting plate 4 has good heat conductivity, and heat can more uniformly enter the quenching combustion chamber 3 through the radiation of the first heat-, the temperature uniformity of different parts of the horizontal section of the quenching furnace 3 is ensured. In addition, all heat uniformly upwards enters the quenching furnace 3 from the bottom of the whole quenching furnace 1, the most reasonable heating principle that hot air flows upwards is applied, and the flame of the traditional industrial gas furnace directly enters the quenching furnace from the top or two sides of the quenching furnace or the local range of two sides of the bottom of the quenching furnace is not the same, so that the furnace temperature uniformity of different height positions of the vertical section of the quenching furnace 3 is ensured.
Through the structural improvement of the quenching furnace, the uniformity of the temperature of the quenching furnace 1 is greatly improved, the temperature difference of the temperature of the quenching furnace 1 is kept within 10 ℃, the problem of non-uniform temperature of the high-temperature quenching furnace 1 is thoroughly solved, the heat treatment quality of metal is improved, and the rejection rate of heat treatment products is reduced.
The lower part of the tempering furnace 18 in the embodiment is provided with a second heat-conducting plate 21, the inner cavity of the tempering furnace 18 is divided into an upper tempering furnace chamber 20 and a lower tempering combustion chamber 24 through the second heat-conducting plate 21, the second heat-conducting plate 21 is provided with a plurality of second through holes 22, and the tempering burner 23 is arranged on the wall of the tempering combustion chamber 24; a stirring fan 17 is arranged in the tempering furnace chamber 20; the tempering furnace door 19 is arranged on one side of the tempering furnace chamber 20.
The tempering combustion chamber 24 and the second heat conduction plate 21 which are additionally arranged at the bottom of the tempering furnace 18 are similar to the quenching combustion chamber at the bottom of the quenching furnace 1 and the first heat conduction plate 4 in design concept, the purpose is to fully and effectively utilize heat energy, reduce energy consumption and save energy, and simultaneously improve the uniformity of the furnace temperature of the tempering furnace 18, so as to uniformly heat a tempered workpiece, but the structure of the tempering combustion chamber 24 is different from that of the quenching combustion chamber, the tempering combustion chamber 24 is not required to be separated by a partition plate 7, and only a tempering burner 23 (equal to 1/4 of the total power of the traditional tempering furnace) with the total power of 4-40 ten thousand calories/hour is arranged in the tempering combustion chamber 24 for adjusting and controlling the furnace temperature of the tempering furnace 18.
In this embodiment, an air preheater 14 is further added, and the air preheater 14 is a conventional heat exchanger that preheats by using the heat of the exhaust smoke of a gas furnace, a boiler, and the like, and is composed of a smoke side flow channel and an air side flow channel. In the embodiment, the tail part of a flue 16 of a tempering furnace 18 is connected with a flue gas side inlet of an air preheater 14, flue gas discharged from the tempering furnace 18 enters a flue gas side flow passage, air enters an air side flow passage from an air side inlet 15 of the air preheater 14, heat in the flue gas is transferred to the air, the flue gas after temperature reduction is discharged through a flue gas side outlet 13, the air after temperature rise enters a combustion air main pipe 12 through an air side outlet, the combustion air main pipe 12 is connected with a combustion air pipeline 10 of a quenching furnace and a combustion air pipeline 11 of the tempering furnace, the combustion air pipeline 10 of the quenching furnace is connected into a quenching burner 8, the combustion air pipeline 11 of the tempering furnace is connected into a tempering burner 23, so that the tail gas waste heat discharged from the flue 16 of the tempering furnace 18 heats the combustion air of the quenching furnace 1 and the tempering furnace 18 through the air preheater 14, which is equivalent to carry out the third utilization of the waste heat of, further improving the energy-saving effect.
Example two:
as shown in fig. 3, in the quenching and tempering building furnace in the present embodiment, the tempering furnace 18 is disposed at the top of the quenching furnace 1, the outlet of the chimney 26 of the quenching furnace 1 is disposed on the furnace wall on the right side of the quenching furnace chamber 3, the furnace wall on the same side (i.e., the right side furnace wall) of the tempering furnace 18 is provided with an air inlet 25 corresponding to the outlet of the chimney 26 of the quenching furnace 1, the outlet of the chimney 26 is communicated with the air inlet 25 of the tempering furnace 18 through a pipeline 27, that is, high-temperature flue gas exhausted from the chimney 26 of the quenching furnace is exhausted into the tempering furnace 18 through the pipeline 27. The other structure is the same as the first embodiment. In the embodiment, all tail gas waste heat of the quenching furnace can be discharged into the tempering furnace to heat the tempering workpiece, so that the purpose of recycling the waste heat is achieved, energy is saved, and the atmospheric environment is protected.
Claims (10)
1. A quenching and tempering floor furnace is characterized in that: the tempering furnace (18) is arranged at the top of the quenching furnace (1), and the outlet of a chimney (26) of the quenching furnace (1) is communicated with the air inlet (25) of the tempering furnace (18).
2. The quenching and tempering floor furnace of claim 1, wherein: an outlet of a chimney (26) of the quenching furnace (1) is arranged at the top of the quenching furnace cavity (3), an air inlet (25) corresponding to the outlet of the chimney (26) of the quenching furnace (1) is arranged at the bottom of the tempering furnace (18), and the outlet of the chimney (26) is directly communicated with the air inlet (25) at the bottom of the tempering furnace (18).
3. The quenching and tempering floor furnace of claim 1, wherein: the outlet of the chimney (26) of the quenching furnace (1) is arranged on the furnace wall on any side of the quenching furnace cavity (3), the furnace wall of the tempering furnace (18) is provided with an air inlet (25) corresponding to the outlet of the chimney (26) of the quenching furnace (1), and the outlet of the chimney (26) is communicated with the air inlet (25) of the tempering furnace (18) through a pipeline (27).
4. The quenching and tempering floor furnace according to any one of claims 1 to 3, characterized in that: the lower part of the quenching furnace (1) is provided with a first heat-conducting plate (4), the inner cavity of the quenching furnace (1) is divided into an upper quenching furnace chamber (3) and a lower quenching combustion chamber by the first heat-conducting plate (4), the first heat-conducting plate (4) is provided with a plurality of first through holes (5), and the quenching burners (8) are arranged on the furnace walls at two sides of the quenching combustion chamber.
5. The quenching and tempering floor furnace of claim 4, wherein: the number of the quenching burners (8) is multiple, and the plurality of quenching burners (8) are uniformly distributed.
6. The quenching and tempering floor furnace of claim 4, wherein: the quenching combustion chamber is divided into a plurality of combustion units (9) by partition plates (7), each combustion unit (9) is at least correspondingly provided with a quenching burner (8), each partition plate (7) is provided with a heat circulation channel (6), and each combustion unit (9) is communicated through each heat circulation channel (6).
7. The quenching and tempering floor furnace of claim 4, wherein: the lower part of the tempering furnace (18) is provided with a second heat-conducting plate (21), the inner cavity of the tempering furnace (18) is divided into an upper tempering furnace chamber (20) and a lower tempering combustion chamber (24) through the second heat-conducting plate (21), the second heat-conducting plate (21) is provided with a plurality of second through holes (22), and the tempering burner (23) is arranged on the wall of the tempering combustion chamber (24).
8. The quenching and tempering floor furnace of claim 7, wherein: a stirring fan (17) is arranged in the tempering furnace (20).
9. The quenching and tempering floor furnace according to any one of claims 1 to 3 or 5 to 8, wherein: the tail of a flue (16) of a tempering furnace (18) is connected with a flue gas side inlet of an air preheater (14), an air side outlet of the air preheater (14) is connected with a combustion air main pipe (12), the combustion air main pipe (12) is connected with a combustion air pipeline (10) of the quenching furnace and a combustion air pipeline (11) of the tempering furnace, the combustion air pipeline (10) of the quenching furnace is connected into a quenching burner (8), and the combustion air pipeline (11) of the tempering furnace is connected into a tempering burner (23).
10. The quenching and tempering floor furnace of claim 4, wherein: the tail of a flue (16) of a tempering furnace (18) is connected with a flue gas side inlet of an air preheater (14), an air side outlet of the air preheater (14) is connected with a combustion air main pipe (12), the combustion air main pipe (12) is connected with a combustion air pipeline (10) of the quenching furnace and a combustion air pipeline (11) of the tempering furnace, the combustion air pipeline (10) of the quenching furnace is connected into a quenching burner (8), and the combustion air pipeline (11) of the tempering furnace is connected into a tempering burner (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921150029.2U CN210826271U (en) | 2019-07-19 | 2019-07-19 | Quenching and tempering floor furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921150029.2U CN210826271U (en) | 2019-07-19 | 2019-07-19 | Quenching and tempering floor furnace |
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| Publication Number | Publication Date |
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| CN210826271U true CN210826271U (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921150029.2U Active CN210826271U (en) | 2019-07-19 | 2019-07-19 | Quenching and tempering floor furnace |
Country Status (1)
| Country | Link |
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| CN (1) | CN210826271U (en) |
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2019
- 2019-07-19 CN CN201921150029.2U patent/CN210826271U/en active Active
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Address after: 255095 No. 17 Rising Road, Zhangdian District, Zibo City, Shandong Province Patentee after: Shandong Lianmei Spring Co.,Ltd. Address before: 255095 No. 17 Rising Road, Zhangdian District, Zibo City, Shandong Province Patentee before: SHANDONG LIANMEI SPRINGS TECHNOLOGY Corp. |
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