CN210180151U - Full-automatic hydrogen reduction furnace - Google Patents
Full-automatic hydrogen reduction furnace Download PDFInfo
- Publication number
- CN210180151U CN210180151U CN201920615697.1U CN201920615697U CN210180151U CN 210180151 U CN210180151 U CN 210180151U CN 201920615697 U CN201920615697 U CN 201920615697U CN 210180151 U CN210180151 U CN 210180151U
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- hydrogen
- pipe
- gas discharge
- nitrogen
- furnace
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 239000001257 hydrogen Substances 0.000 title claims abstract description 55
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 55
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000007789 gas Substances 0.000 claims abstract description 49
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 28
- 238000004806 packaging method and process Methods 0.000 claims abstract description 14
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 9
- 230000001502 supplementing effect Effects 0.000 claims abstract description 7
- 238000005086 pumping Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 238000001816 cooling Methods 0.000 claims description 33
- 229910001220 stainless steel Inorganic materials 0.000 claims description 29
- 239000010935 stainless steel Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 14
- 150000002431 hydrogen Chemical class 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 238000005273 aeration Methods 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims description 2
- 239000007769 metal material Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The utility model discloses a full-automatic hydrogen reduction furnace, which comprises a furnace tube which runs through a heating furnace chamber, wherein one tube opening of the steel furnace tube is sealed by a high-temperature resistant tube plug, and an air inlet tube which is communicated with the furnace tube is arranged through the high-temperature resistant tube plug; the gas inlet pipe is communicated with a hydrogen source, a nitrogen source and a vacuum pump through a hydrogen pipeline, a nitrogen pipeline and a vacuum pumping pipeline, and a pressure sensor and a digital display vacuum gauge are arranged on the gas inlet pipe; the hydrogen pipeline and the nitrogen pipeline are provided with a hydrogen flowmeter, a nitrogen flowmeter and a nitrogen gas supplementing valve; the other pipe orifice of the furnace pipe extends out of the heating hearth and is sealed by a packaging flange plate, a mixed gas discharge pipe and a hydrogen gas discharge pipe are arranged on the furnace pipe extending out of the heating hearth, and a glow plug is arranged on the mixed gas discharge pipe. The utility model discloses the advantage lies in realizing that metal material sinters under vacuum, atmosphere environmental protection and does not receive the automated control of oxidation, simultaneously the utility model discloses the simple operation.
Description
Technical Field
The utility model relates to a heating furnace especially relates to full-automatic hydrogen reduction furnace.
Background
Most of metal materials are sintered and oxidized in a high-temperature environment very quickly, and the metal materials can be effectively prevented from being oxidized when being sintered in a protective gas atmosphere or a reducing gas atmosphere. Hydrogen is a highly reducing gas and is also a very dangerous gas. Therefore, there is a certain risk of using hydrogen as the reducing gas in the heating furnace, and it is a subject of continuous research by those skilled in the art how to improve the safety and automation level of the hydrogen reducing furnace.
Disclosure of Invention
An object of the utility model is to provide a full-automatic hydrogen reducing furnace through the automation level that improves hydrogen reducing furnace, realizes hydrogen reducing furnace safety, reliable operation.
In order to achieve the above purpose, the utility model adopts the following technical proposal:
the full-automatic hydrogen reduction furnace comprises a heating furnace chamber horizontally arranged on a frame, and a stainless steel furnace tube penetrating through the heating furnace chamber, wherein one tube opening of the stainless steel furnace tube is sealed by a high temperature resistant tube plug, and an air inlet tube communicated with the inner cavity of the stainless steel furnace tube penetrates through the high temperature resistant tube plug; the gas inlet pipe is correspondingly communicated with a hydrogen source, a nitrogen source and a vacuum pump through a hydrogen pipeline, a nitrogen pipeline and a vacuum pumping pipeline respectively, and a pressure sensor and a digital display vacuum gauge are arranged on the gas inlet pipe; the hydrogen pipeline and the nitrogen pipeline are respectively and correspondingly provided with a hydrogen flowmeter, a nitrogen flowmeter and a nitrogen gas supplementing valve; the other pipe orifice of the stainless steel furnace pipe extends out of the heating hearth and is sealed through a packaging flange plate, a mixed gas discharge pipe and a hydrogen gas discharge pipe are arranged on the stainless steel furnace pipe extending out of the heating hearth, a mixed gas discharge valve and a hydrogen gas discharge valve are respectively arranged on the mixed gas discharge pipe and the hydrogen gas discharge pipe, and a glow plug is arranged on the mixed gas discharge pipe; a first water cooling jacket and a second water cooling jacket are sleeved on the stainless steel furnace tube extending out of the heating hearth, the mixed gas discharge pipe penetrates through the second water cooling jacket in a sealing manner to be communicated with the mixed gas discharge valve, and the hydrogen gas discharge pipe penetrates through the second water cooling jacket in a sealing manner to be communicated with the hydrogen gas discharge valve; a feeding rod which is driven by a power buffer mechanism to reciprocate is arranged in a sliding mode through the orifice of the packaging flange plate, a material carrying plate is arranged at one end, located in the stainless steel furnace pipe, of the feeding rod, and a thermocouple is arranged on the material carrying plate.
The power buffer mechanism consists of a stepping motor, a screw nut pair and an upper opening buffer seat; the power output shaft of the stepping motor is connected with a lead screw of the lead screw nut pair through a coupler, and a nut of the lead screw nut pair is fixedly connected with the upper opening buffer seat; the level is provided with pressure spring in the upper shed buffer seat, pressure spring one end sets up in the spring holder in the opening buffer seat, pressure spring other end suit with on the feed rod fixed connection's the L-shaped turning arm that falls, fixed cover is equipped with on the feed rod and is used for sealing the silica gel sealing washer in encapsulation flange dish drill way.
And a sliding sleeve is arranged on the buffer seat and is slidably sleeved on the guide rod on the rack.
The machine frame is provided with a single chip microcomputer with a touch screen, a material taking limit switch, a cooling limit switch and a heating limit switch which are used for limiting a feeding rod, a water cooling machine with a water outlet communicated with water inlets of the first water cooling jacket and the second water cooling jacket, and a left moving button, a right moving button, a stopping button and an emergency stopping switch which are used for controlling the movement of the feeding rod; the data acquisition signal input interface of the single chip microcomputer is respectively connected with the data signal output interfaces of the pressure sensor, the digital display vacuum gauge and the thermocouple; the output control interface of the singlechip is respectively connected with the input control interfaces of the vacuum pump, the hydrogen flowmeter, the nitrogen aeration valve, the mixed gas discharge valve, the hydrogen discharge valve, the glow plug and the water chiller; the material taking limit switch, the cooling limit switch and the heating limit switch are respectively connected with a controller signal input interface of the stepping motor, and control signal output interfaces of the left-moving button, the right-moving button, the stop button and the emergency stop switch are respectively connected with an input control interface of the stepping motor controller.
The feeding rod is of a hollow structure, the thermocouple is arranged in the feeding rod, and the working end of the thermocouple is positioned on the material carrying disc.
And an air seal pipe is arranged on the frame, one pipe orifice of the air seal pipe is communicated with a nitrogen source through a control valve, and the other pipe orifice of the air seal pipe is positioned at the hole opening of the packaging flange plate.
The utility model discloses the advantage lies in realizing that metal material sinters under vacuum, atmosphere environmental protection and does not receive the automated control of oxidation, simultaneously the utility model discloses the simple operation.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged schematic view of a portion I of fig. 1.
Fig. 3 is a left side view of the structure of fig. 1.
Fig. 4 is a schematic top view of the structure of fig. 1 (with the digital display vacuum gauge and touch screen hidden).
Detailed Description
As shown in fig. 1-4, the full-automatic hydrogen reducing furnace of the present invention comprises a heating furnace chamber 1 horizontally disposed on a frame, a temperature-resistant stainless steel furnace tube 2 disposed through the heating furnace chamber 1, a right nozzle of the temperature-resistant stainless steel furnace tube 2 sealed by a high-temperature-resistant tube plug 3, and an air inlet tube 4 disposed through the high-temperature-resistant tube plug 3 and communicated with an inner cavity of the temperature-resistant stainless steel furnace tube 2; the gas inlet pipe 4 is correspondingly communicated with a hydrogen source, a nitrogen source and a vacuum pump 8 through a hydrogen pipeline 5, a nitrogen pipeline 6 and a vacuum-pumping pipeline 7, and a pressure sensor 9 and a digital display vacuum gauge 10 are arranged on the gas inlet pipe 4; the hydrogen pipeline 5 and the nitrogen pipeline 6 are respectively and correspondingly provided with a hydrogen flowmeter 11, a nitrogen flowmeter 12 and a nitrogen gas supplementing valve 13; the flow of hydrogen can be accurately controlled through the hydrogen flowmeter 11, and the nitrogen aeration valve 13 can rapidly clean the inner cavity of the whole temperature-resistant stainless steel furnace tube 2 in a large flow.
As shown in fig. 1 and 2, a left nozzle of the temperature-resistant stainless steel furnace tube 2 extends out of the heating furnace 1 and is sealed by a packaging flange 14, a mixed gas discharge tube 15 and a hydrogen discharge tube 16 are arranged on the temperature-resistant stainless steel furnace tube 2 extending out of the heating furnace 1, a mixed gas discharge valve 17 and a hydrogen discharge valve 18 are respectively arranged on the mixed gas discharge tube 15 and the hydrogen discharge tube 16, and a glow plug 19 is arranged on the mixed gas discharge tube 15; the temperature-resistant stainless steel furnace tube 2 extending out of the heating hearth 1 is sequentially sleeved with a first water cooling jacket 20 and a second water cooling jacket 21 along the axial direction, the mixed gas discharge pipe 15 penetrates through the second water cooling jacket 21 in a sealing manner to be communicated with the mixed gas discharge valve 17, and the hydrogen gas discharge pipe 16 penetrates through the second water cooling jacket 21 in a sealing manner to be communicated with the hydrogen gas discharge valve 18. The first water cooling jacket 20 is used for cooling materials during discharging, and the second water cooling jacket 21 is used for cooling mixed gas and hydrogen. A hollow structure feeding rod 22 driven by a power buffer mechanism to reciprocate is arranged in a sliding mode through the hole opening of the packaging flange 14, a material loading disc 23 is arranged at one end, located in the temperature-resistant stainless steel furnace tube 2, of the feeding rod 22, a thermocouple 24 is arranged in a tube cavity of the hollow structure feeding rod 22, and the working end of the thermocouple 24 is located on the material loading disc 23.
As shown in fig. 1, 2 and 4, the power buffer mechanism is composed of a stepping motor 25, a screw-nut pair and an upper opening buffer seat 26; a power output shaft of the stepping motor 25 is connected with a lead screw 27 of a lead screw nut pair through a coupler, and a nut 28 of the lead screw nut pair is welded with an upper opening buffer seat 26 into a whole; a pressure spring 29 is horizontally arranged in the upper opening buffer seat 26, the left end of the pressure spring 29 is arranged in a spring seat in the opening buffer seat 26, the right port of the pressure spring 29 is sleeved on an inverted L-shaped crank arm 30 welded with the feed rod 22, and a silica gel sealing ring 31 used for sealing the port of the packaging flange plate 14 is fixedly sleeved on the feed rod 22. In actual manufacturing, the buffer seat 26 and the nut 28 may be manufactured as an integral structure, the sliding sleeve 41 is welded on the buffer seat 26, and the sliding sleeve 41 is slidably sleeved on the guide rod 42 on the frame, so as to improve the stability of the reciprocating motion of the buffer seat 26.
As shown in fig. 1, 3 and 4, a single chip with a touch screen 32, a material taking limit switch 33 for limiting the movement of the feeding rod 22, a cooling limit switch 34, a heating limit switch 35, a water cooling machine 36 with a water outlet communicated with the water inlets of the first water cooling jacket 20 and the second water cooling jacket 21 through water supply pipelines 43 and 44, a left moving button 37, a right moving button 38, a stop button 39 and an emergency stop switch 40 are arranged on the frame; the data acquisition signal input interface of the singlechip is respectively connected with the data signal output interfaces of the pressure sensor 9, the digital display vacuum gauge 10 and the thermocouple 24; the output control interface of the singlechip is respectively connected with the input control interfaces of a vacuum pump 8, a hydrogen flowmeter 11, a nitrogen flowmeter 12, a nitrogen gas make-up valve 13, a mixed gas discharge valve 17, a hydrogen discharge valve 18, a glow plug 19 and a water cooler 36; the limit signal output interfaces of the material taking limit switch 33, the cooling limit switch 34 and the heating limit switch 35 are respectively connected with the signal input interface of the controller of the stepping motor 25, and the control signal output interfaces of the left-moving button 37, the right-moving button 38, the stop button 39 and the emergency stop switch 40 are respectively connected with the input control interface of the controller of the stepping motor.
In order to prevent the gas in the temperature-resistant stainless steel furnace tube 2 from overflowing during material taking, a gas seal tube 45 is arranged on the rack, a gas inlet of the gas seal tube 45 is communicated with a nitrogen source through a control valve, a gas outlet of the gas seal tube 45 is positioned at the hole opening of the packaging flange plate, and a gas curtain is formed at the hole opening of the packaging flange plate through blowing nitrogen for gas sealing.
The utility model discloses the theory of operation is as follows briefly:
during operation, firstly, a temperature rise curve, a nitrogen flow, a hydrogen opening temperature, a hydrogen closing temperature and a material taking temperature are set on the touch screen 32 according to a sample, then the sample is placed on the material carrying disc 23, the right shift button 38 is pressed, the stepping motor 25 controls the feeding rod 22 to enter the temperature-resistant stainless steel furnace tube 2 through the lead screw nut pair, the right shift button 38 is continuously pressed when the feeding rod 22 reaches the position of the cooling limit switch 34, the material is rapidly heated in the heating furnace 1 when the feeding rod 22 moves to the position of the heating limit switch 35 and is automatically stopped, and meanwhile, the silica gel sealing ring 31 is lowered under the elastic action of the pressure spring 29 to seal the temperature-resistant stainless steel furnace tube 2.
When an automatic operation button on the touch screen 32 is pressed, the single chip microcomputer program automatically operates according to the following steps:
firstly, washing a furnace, then starting a vacuum pump 8, starting vacuumizing, stopping the vacuum pump 8 when the vacuum degree reaches within 50Pa, opening a nitrogen gas supplementing valve 13, closing the nitrogen gas supplementing valve 13 after the set micro-positive pressure is reached in a temperature-resistant stainless steel furnace tube 2, starting the vacuum pump 8, continuing vacuumizing, circulating for 3 times in such a way, starting a nitrogen gas flowmeter 12 to feed gas according to the set flow, opening a mixed gas discharge valve 17 after the nitrogen pressure reaches the set micro-positive pressure, then heating a hearth 1 to start heating, starting a hydrogen gas flowmeter 11 to feed hydrogen according to the set flow when a material area thermocouple 24 reaches the set temperature of hydrogen gas, simultaneously opening an ignition plug 19, and automatically igniting when the hydrogen gas flows out from an outlet of a hydrogen gas discharge pipe 16; after the operation of the temperature-rising curve is finished, the nitrogen gas supplementing valve 13 is opened, nitrogen purging is carried out on the inner cavity of the temperature-resistant stainless steel furnace tube 2, and then the material automatically exits to the position of the first water cooling jacket 20 to be rapidly cooled; when the thermocouple 24 in the material area reaches the temperature for setting hydrogen off, the hydrogen flowmeter 11 is closed to stop hydrogen supply, the hydrogen discharge valve 18 is opened at the same time, nitrogen is used for purging for 2 minutes to remove the residual hydrogen in the inner cavity of the temperature-resistant stainless steel furnace tube 2, and the hydrogen discharge valve 18 is automatically closed after 2 minutes.
When the thermocouple 24 in the material area reaches the material discharging temperature, an alarm prompt tone is generated on the touch screen 18 to prompt a user to open the packaging flange 14, and then the left-moving button 37 is pressed to enable the material to reach the position of the material discharging limit switch 33, so that the material can be discharged. At this time, in order to prevent the gas in the temperature-resistant stainless steel furnace tube 2 from overflowing, the control valve is opened to hermetically seal the orifice of the packaging flange plate through the gas seal tube 45. Pressing the program stop key on the touch screen 32 ends the program.
Claims (6)
1. The utility model provides a full-automatic hydrogen reduction furnace, includes that the level sets up the heating furnace in the frame, runs through the stainless steel boiler tube that heating furnace set up, its characterized in that: a pipe orifice of the stainless steel furnace pipe is sealed by a high temperature resistant pipe plug, and an air inlet pipe communicated with the inner cavity of the stainless steel furnace pipe penetrates through the high temperature resistant pipe plug; the gas inlet pipe is correspondingly communicated with a hydrogen source, a nitrogen source and a vacuum pump through a hydrogen pipeline, a nitrogen pipeline and a vacuum pumping pipeline respectively, and a pressure sensor and a digital display vacuum gauge are arranged on the gas inlet pipe; the hydrogen pipeline and the nitrogen pipeline are respectively and correspondingly provided with a hydrogen flowmeter, a nitrogen flowmeter and a nitrogen gas supplementing valve; the other pipe orifice of the stainless steel furnace pipe extends out of the heating hearth and is sealed through a packaging flange plate, a mixed gas discharge pipe and a hydrogen gas discharge pipe are arranged on the stainless steel furnace pipe extending out of the heating hearth, a mixed gas discharge valve and a hydrogen gas discharge valve are respectively arranged on the mixed gas discharge pipe and the hydrogen gas discharge pipe, and a glow plug is arranged on the mixed gas discharge pipe; a first water cooling jacket and a second water cooling jacket are sleeved on the stainless steel furnace tube extending out of the heating hearth, the mixed gas discharge pipe penetrates through the second water cooling jacket in a sealing manner to be communicated with the mixed gas discharge valve, and the hydrogen gas discharge pipe penetrates through the second water cooling jacket in a sealing manner to be communicated with the hydrogen gas discharge valve; a feeding rod which is driven by a power buffer mechanism to reciprocate is arranged in a sliding mode through the orifice of the packaging flange plate, a material carrying plate is arranged at one end, located in the stainless steel furnace pipe, of the feeding rod, and a thermocouple is arranged on the material carrying plate.
2. The full-automatic hydrogen reduction furnace according to claim 1, characterized in that: the power buffer mechanism consists of a stepping motor, a screw nut pair and an upper opening buffer seat; the power output shaft of the stepping motor is connected with a lead screw of the lead screw nut pair through a coupler, and a nut of the lead screw nut pair is fixedly connected with the upper opening buffer seat; the level is provided with pressure spring in the upper shed buffer seat, pressure spring one end sets up in the spring holder in the opening buffer seat, pressure spring other end suit with on the feed rod fixed connection's the L-shaped turning arm that falls, fixed cover is equipped with on the feed rod and is used for sealing the silica gel sealing washer in encapsulation flange dish drill way.
3. The full-automatic hydrogen reduction furnace according to claim 2, characterized in that: and a sliding sleeve is arranged on the buffer seat and is slidably sleeved on the guide rod on the rack.
4. The full-automatic hydrogen reduction furnace according to claim 2, characterized in that: the machine frame is provided with a single chip microcomputer with a touch screen, a material taking limit switch, a cooling limit switch and a heating limit switch which are used for limiting a feeding rod, a water cooling machine with a water outlet communicated with water inlets of the first water cooling jacket and the second water cooling jacket, and a left moving button, a right moving button, a stopping button and an emergency stopping switch which are used for controlling the movement of the feeding rod; the data acquisition signal input interface of the single chip microcomputer is respectively connected with the data signal output interfaces of the pressure sensor, the digital display vacuum gauge and the thermocouple; the output control interface of the singlechip is respectively connected with the input control interfaces of the vacuum pump, the hydrogen flowmeter, the nitrogen aeration valve, the mixed gas discharge valve, the hydrogen discharge valve, the glow plug and the water chiller; the material taking limit switch, the cooling limit switch and the heating limit switch are respectively connected with a controller signal input interface of the stepping motor, and control signal output interfaces of the left-moving button, the right-moving button, the stop button and the emergency stop switch are respectively connected with an input control interface of the stepping motor controller.
5. The full-automatic hydrogen reduction furnace according to claim 1 or 2, characterized in that: the feeding rod is of a hollow structure, the thermocouple is arranged in the feeding rod, and the working end of the thermocouple is positioned on the material carrying disc.
6. The full-automatic hydrogen reduction furnace according to claim 1 or 2, characterized in that: and an air seal pipe is arranged on the frame, one pipe orifice of the air seal pipe is communicated with a nitrogen source through a control valve, and the other pipe orifice of the air seal pipe is positioned at the hole opening of the packaging flange plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920615697.1U CN210180151U (en) | 2019-04-30 | 2019-04-30 | Full-automatic hydrogen reduction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920615697.1U CN210180151U (en) | 2019-04-30 | 2019-04-30 | Full-automatic hydrogen reduction furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210180151U true CN210180151U (en) | 2020-03-24 |
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ID=69832206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920615697.1U Active CN210180151U (en) | 2019-04-30 | 2019-04-30 | Full-automatic hydrogen reduction furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210180151U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243173A (en) * | 2019-04-30 | 2019-09-17 | 河南诺巴迪材料科技有限公司 | Full-automatic hydrogen reducing furnace |
| CN111707100A (en) * | 2020-06-24 | 2020-09-25 | 中南大学 | reduction tank |
| CN113385763A (en) * | 2021-07-14 | 2021-09-14 | 成都共益缘真空设备有限公司 | Vacuum reflow soldering positive and negative pressure combined soldering process |
-
2019
- 2019-04-30 CN CN201920615697.1U patent/CN210180151U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243173A (en) * | 2019-04-30 | 2019-09-17 | 河南诺巴迪材料科技有限公司 | Full-automatic hydrogen reducing furnace |
| CN111707100A (en) * | 2020-06-24 | 2020-09-25 | 中南大学 | reduction tank |
| CN111707100B (en) * | 2020-06-24 | 2021-07-06 | 中南大学 | Reduction pot |
| CN113385763A (en) * | 2021-07-14 | 2021-09-14 | 成都共益缘真空设备有限公司 | Vacuum reflow soldering positive and negative pressure combined soldering process |
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