CN104099447A - Fuel gas type trolley furnace system - Google Patents
Fuel gas type trolley furnace system Download PDFInfo
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- CN104099447A CN104099447A CN201410372957.9A CN201410372957A CN104099447A CN 104099447 A CN104099447 A CN 104099447A CN 201410372957 A CN201410372957 A CN 201410372957A CN 104099447 A CN104099447 A CN 104099447A
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- 239000002737 fuel gas Substances 0.000 title claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims abstract description 33
- 239000007789 gas Substances 0.000 claims description 105
- 238000007789 sealing Methods 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 6
- 229920002379 silicone rubber Polymers 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000004945 silicone rubber Substances 0.000 claims description 5
- 239000003345 natural gas Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 210000003625 skull Anatomy 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 230000001788 irregular Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 238000009792 diffusion process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000003483 aging Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Furnace Details (AREA)
Abstract
The invention discloses a fuel gas type trolley furnace system which comprises a plurality of trolley furnaces, fuel gas transportation pipeline branches, first high-speed switch valves arranged on the fuel gas transportation pipeline branches, a fuel gas transportation main pipeline and a first self-supporting regulating valve arranged on the fuel gas transportation main pipeline, second high-speed switch valves arranged on a valve-front fuel gas transportation main pipeline of the first self-supporting regulating valve, a relay, a control switch and a change-over switch, wherein the relay is connected among the second high-speed switch valve and the first high-speed switch valves of all the fuel gas transportation pipeline branches and used for receiving starting signals of all the first high-speed switch valves to automatically control the second high-speed switch valves; the control switch is connected onto the second high-speed switch valves through the relay so as to manually control the second high-speed valves; the change-over switch is used for realizing the switch between the automatic control and manual control of the second high-speed valves; According to the trolley furnace system, the irregular fuel gas diffusion can be effectively prevented and the trolley furnace is improved simultaneously to prevent the heat in the furnace from dissipating in the working process.
Description
Technical Field
The invention belongs to the field of heat treatment of workpieces and materials, and particularly relates to a gas type trolley furnace system.
Background
The bogie hearth furnace is one energy saving type national standard periodic furnace for high chromium and high manganese steel casting, grey cast iron casting, nodular cast iron casting, roller, steel ball, crusher hammer, wear resisting lining board, quenching, annealing, ageing and heat treatment of various mechanical parts. The gas type trolley furnaces are provided with self-supporting regulating valves, the self-supporting regulating valves are used for regulating the opening degree of pipeline valves, and due to the working mechanism of the gas type trolley furnaces, the gas type trolley furnaces cannot be completely closed in practical application due to the closing of the pipelines. This results in a fear that the gas pressure after the valve of the self-standing regulating valve in the gas main line or the self-standing regulating valve in the gas branch line gradually rises when all the bogie furnaces are not in operation, and generally gradually rises to the same level as the gas pressure before the valve due to the irregular bleeding of the gas in about two days. The trolley furnace is in the process of not using, and the gas pressure that bears on the gas delivery pipe is higher than when the trolley furnace is used normally gradually, not only makes the gas delivery pipe have cracked risk, still can cause the harm to self-supporting governing valve. Furthermore, although in the prior art, a safety valve is designed to automatically open the pressure when the pressure behind the self-supporting regulating valve rises to a certain value, since the gas is conveyed in the pipeline and the working environment is filled with a large amount of combustible particles, there is also a great potential safety hazard when the gas is discharged from the safety valve. Furthermore, most of the trolley furnaces have high temperature and large heat in the furnace when working, and have extremely high requirements on the sealing property between the furnace body and the trolley so as to ensure that the heat cannot be dissipated and avoid prolonging the unnecessary heat treatment processing time of the workpiece, which cannot be well met on the existing gas-type trolley furnaces.
Disclosure of Invention
The invention provides a gas type trolley furnace system based on the problems to be solved, which is mainly characterized in that a quick-cut valve is additionally arranged on a gas transmission main pipeline and acts based on whether gas is transmitted by each trolley furnace gas transmission branch pipeline or not, so that the phenomenon that gas in the gas transmission main pipeline is scattered irregularly is prevented, gas resources are saved, and the safety performance is improved. Meanwhile, the furnace body of the trolley furnace and the trolley are improved in mechanical structure, the sealing performance of the furnace body and the trolley during the matched work is improved, and the possibility of heat loss in the furnace is reduced.
The technical scheme provided by the invention is as follows:
the utility model provides a gas formula platform truck stove system, includes many platform truck stoves to and be connected to the gas delivery lateral conduit of every platform truck stove, wherein all be equipped with first fast valve of cutting on the gas delivery lateral conduit of every platform truck stove, especially, the system still includes:
the gas transmission main pipeline is connected between the external natural gas transmission station and the gas transmission branch pipeline of each trolley furnace;
a first self-standing regulating valve disposed on the gas delivery main;
a second quick-cut valve disposed on a valve front gas delivery main of the first self-standing regulating valve;
the relay is connected between the second quick-switching valve and the first quick-switching valves of the fuel gas conveying branch pipelines to receive opening signals of the first quick-switching valves to realize automatic control of the second quick-switching valves;
the control switch is connected to the second quick-cutting valve through the relay so as to realize manual control on the second quick-cutting valve;
and the change-over switch is arranged between the first quick-change valve of each fuel gas conveying branch pipeline and the control switch and is used for realizing the change-over of the automatic control and the manual control modes of the second quick-change valve.
Preferably, the second quick-cut valve is also connected to a power supply source through a circuit breaker.
Preferably, a second self-supporting adjusting valve is further provided in the gas delivery branch pipe of each of the bogie furnaces, the second self-supporting adjusting valve being located after the first quick-cut valve in the gas branch pipe.
Preferably, the first self-standing regulator valve and the second self-standing regulator valve each employ a self-standing pressure regulator valve.
Preferably, the car-bottom furnace in the system comprises: the furnace body and the object carrying trolley which can move between the cranial cavity of the furnace body and the outside are arranged; wherein
The furnace body is provided with first grooves on the periphery of the outer furnace wall at the skull cavity inlet;
the trolley is provided with a furnace door to seal a cranial cavity inlet of the furnace body when the materials are completely pushed into the cranial cavity, wherein the furnace door is slightly larger than the cranial cavity inlet of the furnace body, and a first bulge which can be inserted into the first groove and is matched with the first bulge is arranged on the contact surface of the furnace door and the outer furnace wall of the cranial cavity inlet; at the same time, the user can select the desired position,
and a high-temperature-resistant sealing component is arranged in the first groove and/or on the first bulge.
Preferably, a plurality of second protrusions which are irregularly distributed are further arranged in the first groove, and the irregular distribution mode is as follows: the two adjacent second bulges are not in the same length direction of the first groove or the same width direction of the first groove, and the two adjacent second bulges are separated by different distances; wherein,
and the first bulge is provided with second grooves which correspond to the second bulges in the first grooves and are matched with the second bulges.
Preferably, the cross section of the first groove is U-shaped, the depth of the first groove is 5-8cm, and the height of the second protrusion in the first groove is 2-4 cm.
Preferably, a sealing element is arranged in the first groove, and the sealing element is a sealing washer made of silicone rubber through injection molding, sleeved on the second protrusion and attached to the bottom of the groove.
Preferably, the first protrusion is provided with a sealing member, and the sealing member is a sealing gasket made of silicone rubber through injection molding, and is adhered to the top of the first protrusion through high-viscosity adhesive and opens the second groove on the first protrusion.
According to the gas type trolley furnace system, the problem that when gas conveying branch pipelines of all trolley furnaces do not supply gas, the self-supporting regulating valve cannot close the pipelines, so that the pressure behind the valve continuously rises, and further the pipelines have potential safety hazards is effectively solved by installing the quick-switching valve in front of the self-supporting regulating valve on the gas conveying main pipeline, namely when at least one trolley furnace is used, the quick-switching valve is in an open state, and otherwise, the quick-switching valve is in a closed state. The gas type trolley furnace system effectively prevents the gas from being diffused irregularly, improves the safety performance, saves the gas resource and reduces the pollution to the environment. Furthermore, the invention also improves the mechanical structure of the furnace body and the trolley of the trolley furnace, improves the sealing performance of the trolley furnace and the trolley during the matching operation, reduces the possibility of heat dissipation in the furnace, and the complex mechanical structure shows the accuracy of the mutual matching between the trolley and the furnace body on another layer.
Drawings
FIG. 1 is a block diagram of a gas fired trolley furnace system according to the present invention;
FIG. 2 is a simplified electrical schematic of the gas fired trolley furnace system of the present invention;
FIG. 3 is a schematic view of a modified trolley furnace body of the gas-fired trolley furnace system according to the present invention;
fig. 4 is a schematic diagram of an improved trolley furnace trolley of the gas-fired trolley furnace system.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
As shown in fig. 1 to 2, the present invention provides a gas-type bogie hearth furnace system including a plurality of bogie hearths 8, and a gas delivery branch pipe 6 connected to each bogie hearth furnace, wherein the gas delivery branch pipe of each bogie hearth furnace is provided with a first quick-cut valve 5, and particularly, the system further includes: a gas delivery main pipe 2 connected between the external natural gas delivery station 1 and the gas delivery branch pipes of each car furnace; a first self-standing regulating valve 4 provided on the gas delivery main; a second quick-cut valve 3 provided on a valve front gas delivery main of the first self-standing regulating valve; a relay (KC001) connected between the second fast switching valve and the first fast switching valve (KC104/KC204/KC304/KC404/KC504) of each gas delivery branch pipe to receive an opening signal of each first fast switching valve to realize automatic control of the second fast switching valve; a control switch SW2 connected to the second quick-cut valve through the relay for manual control of the second quick-cut valve; and a switching switch SW1, which is arranged between the first quick-switching valve of each gas delivery branch pipeline and the control switch, and is used for realizing the switching between the automatic control and the manual control mode of the second quick-switching valve.
Here, fig. 2 is a schematic diagram of the part, wherein KC104/KC204/KC304/KC404/KC504 are respectively opening relay contacts of the first quick-switching valves of the gas delivery branch pipes on each bogie hearth furnace, when the switch SW1 is shifted to the 002 position in the diagram, the valve control of the second quick-switching valve is shown to be automatic control, that is, the coil of the relay KC001 connected with the second quick-switching valve receives the opening signal of each first quick-switching valve to be electrified, so that the normally-open contact at the lowest end in fig. 2 is closed, and the second quick-switching valve is opened, which means that the gas delivery main pipe disconnects the gas supply; when the switch SW1 is switched to position 003 in the figure, the valve control of the second quick-cut valve is manually controlled, that is, the coil of the relay KC001 connected with the second quick-cut valve is electrified according to the action of the control switch SW2, which means that the second quick-cut valve can be manually operated to manually control whether the gas supply of the gas delivery main is performed or not. As seen in fig. 2, the switch SW1 has one end connected to a power source and the other end selectively connected to each of the first quick-switching valves or the control switch SW2, so as to energize the coil of the relay controlling the second quick-switching valve.
In the present invention, the second quick-switching valve is provided in the gas delivery main line, and the gas delivery from the gas delivery branch line in each of the bogie furnaces is received or not, so that whether the gas supply needs to be cut off or not is determined. Here, only when the gas delivery branch pipes of all the bogie furnaces are opened, the gas supply of the gas delivery main pipe is cut off to reduce the gas pressure of the pipes; when at least one part of the trolley furnaces works, the first self-supporting regulating valve can output fuel gas with normal fuel gas pressure according to the process requirement, so that the part of the trolley furnaces can work normally.
As can be seen from fig. 2, in the present invention, the second quick-cut valve is also connected to the power supply through a circuit breaker QDF1, and the second quick-cut valve can be de-energized by operating the circuit breaker.
Since the gas pressure in the gas delivery main is adjusted accordingly through the first self-standing regulating valve, but the gas demand for each of the car furnaces needs to be adjusted again for normal operation, the gas car furnace system of the present invention further comprises: and a plurality of second self-supporting adjusting valves 7 which are respectively provided on the gas delivery branch pipes of each of the bogie furnaces to adjust the gas pressure of the gas received from the gas delivery main pipe and are located behind the first quick-cut valves of the gas delivery branch pipes.
In the present invention, a self-standing pressure control valve is used for each of the first and second self-standing control valves.
Wherein, the gas pressure before the valve of the gas delivery main pipe where the first self-supporting regulating valve is located is usually 4 kilograms, and the gas pressure after the valve is regulated to 1 kilogram. Here, the pre-valve gas pressure of the gas delivery main is determined by the pressurization of the natural gas delivery station, and the post-valve gas pressure is such that the valve opens when less than 1 kg and closes when more than 1 kg. The working mechanism of the regulating valve is that the flow opening of the pipeline is regulated by regulating the valve clack in the regulating valve, so that the regulating valve cannot be completely closed in practical application. If at least one car furnace is in use (that is, the gas delivery branch pipe of at least one car furnace is in a gas supply state), the potential hazard can be ignored (because the gas is continuously used by other car furnaces).
Because the gas conveying branch pipeline is connected to the gas conveying main pipeline through the pipe divider, the pressure of gas in front of the valve of the gas conveying branch pipeline where the second self-standing regulating valve is located is 1 kilogram, and the pressure of gas behind the valve is regulated to be 0.4 kilogram (namely, the valve is opened when the pressure of gas behind the valve of the second self-standing regulating valve is less than 0.4 kilogram, and the valve is closed when the pressure of gas behind the valve of the second self-standing regulating valve is more than 0.4 kilogram).
By applying the improved scheme of the gas-type trolley furnace system on the gas delivery main pipeline, the possibility of unscheduled gas emission when the trolley furnace does not work is greatly reduced, the energy waste is reduced, and the environment is indirectly protected.
On the basis of improving a gas pipeline, the gas type trolley furnace system provided by the invention also improves the sealing performance of the trolley furnace, and the improved scheme is as follows:
as shown in fig. 3 to 4, the present invention provides a trolley oven 8 of a gas-type trolley oven system, comprising: a furnace body 81 and a material carrying 14 trolley 82 which can move between the cranial cavity 15 of the furnace body and the outside; wherein, the furnace body is provided with a first groove 811 at the periphery of the outer furnace wall at the cranial cavity inlet; the trolley is provided with a furnace door 821 for sealing the cranial cavity inlet of the furnace body when the materials are completely pushed into the cranial cavity, wherein the furnace door is slightly larger than the cranial cavity inlet of the furnace body, and a first bulge 822 which can be inserted into the first groove and is matched with the first groove is arranged on the contact surface of the furnace door and the outer furnace wall of the cranial cavity inlet; meanwhile, in order to ensure the sealing performance, a high-temperature-resistant sealing component is arranged in the first groove and/or on the first bulge. By adopting the combination of the groove and the bulge, the contact area between the furnace door of the trolley and the cranial cavity inlet of the furnace body is greatly increased, and the sealing property between the gap of the furnace door and the gap of the furnace body is improved.
Further, a plurality of second protrusions 812 which are irregularly distributed are further arranged in the first groove, and the irregular distribution mode is as follows: the two adjacent second bulges are not in the same length direction of the first groove or the same width direction of the first groove, and the two adjacent second bulges are separated by different distances; and a second groove 823 which corresponds to and is matched with the plurality of second protrusions in the first groove is formed in the first protrusion. The length direction and the width direction of the first groove are shown in fig. 3.
In order to facilitate the processing and ensure the improvement effect of the sealing performance, the invention preferably has the cross section of the first groove in a U shape, the depth of the first groove is 5-8cm, and the height of the second protrusion in the first groove is 2-4 cm.
The above-mentioned sealing member is designed in the present invention such that:
the first method comprises the following steps: a sealing part 813 is arranged in the first groove, and the sealing part is a sealing washer made of silicon rubber through injection molding, sleeved on the second protrusion 812 and attached to the bottom of the groove.
And the second method comprises the following steps: a sealing member 824 is provided on the first protrusion, and is a sealing washer made of silicone rubber through injection molding, and is adhered to the top of the first protrusion through a high-viscosity adhesive, and opens the second groove thereon (to ensure that the second groove can be inserted into the second protrusion).
According to the gas-fired trolley furnace system, through the improvement on the furnace door of the trolley furnace and the cranial cavity inlet of the furnace body, the contact area of the furnace door and the furnace body is greatly increased, the gap between the furnace door and the furnace body is reduced, the sealing performance of the furnace door and the furnace body is improved, and the dissipation of high heat in the furnace is prevented.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (9)
1. The utility model provides a gas formula platform truck stove system, includes many platform truck stoves to and be connected to the gas delivery lateral conduit of every platform truck stove, wherein all be equipped with first fast valve of cutting on the gas delivery lateral conduit of every platform truck stove, its characterized in that, the system still includes:
the gas transmission main pipeline is connected between the external natural gas transmission station and the gas transmission branch pipeline of each trolley furnace;
a first self-standing regulating valve disposed on the gas delivery main;
a second quick-cut valve disposed on a valve front gas delivery main of the first self-standing regulating valve;
the relay is connected between the second quick-switching valve and the first quick-switching valves of the fuel gas conveying branch pipelines to receive opening signals of the first quick-switching valves to realize automatic control of the second quick-switching valves;
the control switch is connected to the second quick-cutting valve through the relay so as to realize manual control on the second quick-cutting valve;
and the change-over switch is arranged between the first quick-change valve of each fuel gas conveying branch pipeline and the control switch and is used for realizing the change-over of the automatic control and the manual control modes of the second quick-change valve.
2. A gas fired trolley furnace system as in claim 1 wherein the second quick disconnect valve is also connected to a power supply through a circuit breaker.
3. A gas-type trolley furnace system as claimed in claim 1, wherein the gas delivery branch pipe of each trolley furnace is further provided with a second self-standing regulating valve, which is located after the first quick-cut valve on the gas branch pipe.
4. A gas-fired trolley furnace system as claimed in claim 1 or 3, wherein the first self-standing regulating valve and the second self-standing regulating valve each employ a self-standing pressure regulating valve.
5. A gas fired trolley furnace system as claimed in claim 1 wherein the system trolley furnace comprises: the furnace body and the object carrying trolley which can move between the cranial cavity of the furnace body and the outside are arranged; wherein
The furnace body is provided with first grooves on the periphery of the outer furnace wall at the skull cavity inlet;
the trolley is provided with a furnace door to seal a cranial cavity inlet of the furnace body when the materials are completely pushed into the cranial cavity, wherein the furnace door is slightly larger than the cranial cavity inlet of the furnace body, and a first bulge which can be inserted into the first groove and is matched with the first bulge is arranged on the contact surface of the furnace door and the outer furnace wall of the cranial cavity inlet; at the same time, the user can select the desired position,
and a high-temperature-resistant sealing component is arranged in the first groove and/or on the first bulge.
6. A gas fired trolley furnace system as in claim 5 further including a plurality of irregularly distributed second projections disposed within the first recess in a manner: the two adjacent second bulges are not in the same length direction of the first groove or the same width direction of the first groove, and the two adjacent second bulges are separated by different distances; wherein,
and the first bulge is provided with second grooves which correspond to the second bulges in the first grooves and are matched with the second bulges.
7. A gas fired trolley furnace system as claimed in claim 6 wherein the first recess is "U" shaped in cross section and has a depth of 5-8cm and the second projection has a height of 2-4cm within the first recess.
8. A gas fired trolley furnace system as in claim 7 wherein a seal is provided in the first groove, the seal being a gasket made of silicone rubber by injection molding, which fits over the second protrusion and conforms to the bottom of the groove.
9. A gas fired trolley furnace system as claimed in claim 7 wherein the first projection is provided with a seal, the seal being a silicone rubber injection moulded sealing gasket bonded to the top of the first projection by a high viscosity adhesive leaving open a second recess therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410372957.9A CN104099447B (en) | 2014-07-31 | 2014-07-31 | A kind of gas-fired bogie furnace system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410372957.9A CN104099447B (en) | 2014-07-31 | 2014-07-31 | A kind of gas-fired bogie furnace system |
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| Publication Number | Publication Date |
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| CN104099447A true CN104099447A (en) | 2014-10-15 |
| CN104099447B CN104099447B (en) | 2016-06-22 |
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| CN201410372957.9A Active CN104099447B (en) | 2014-07-31 | 2014-07-31 | A kind of gas-fired bogie furnace system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202281500U (en) * | 2011-10-08 | 2012-06-20 | 南京正光炉业有限责任公司 | Heating system of gas-fired bogie furnace |
| CN102703648A (en) * | 2012-06-18 | 2012-10-03 | 无锡宇吉科技有限公司 | Trolley gas thermal treatment furnace |
| CN102703650A (en) * | 2012-07-09 | 2012-10-03 | 丹阳市江南工业炉有限公司 | Super-large trolley type gas heat treatment furnace |
| CN203960258U (en) * | 2014-07-31 | 2014-11-26 | 江苏联峰能源装备有限公司 | A kind of gas-fired bogie furnace system |
-
2014
- 2014-07-31 CN CN201410372957.9A patent/CN104099447B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202281500U (en) * | 2011-10-08 | 2012-06-20 | 南京正光炉业有限责任公司 | Heating system of gas-fired bogie furnace |
| CN102703648A (en) * | 2012-06-18 | 2012-10-03 | 无锡宇吉科技有限公司 | Trolley gas thermal treatment furnace |
| CN102703650A (en) * | 2012-07-09 | 2012-10-03 | 丹阳市江南工业炉有限公司 | Super-large trolley type gas heat treatment furnace |
| CN203960258U (en) * | 2014-07-31 | 2014-11-26 | 江苏联峰能源装备有限公司 | A kind of gas-fired bogie furnace system |
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| CN104099447B (en) | 2016-06-22 |
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