CN112629192A - Double-chamber crude selenium drying device - Google Patents

Double-chamber crude selenium drying device Download PDF

Info

Publication number
CN112629192A
CN112629192A CN202011589008.8A CN202011589008A CN112629192A CN 112629192 A CN112629192 A CN 112629192A CN 202011589008 A CN202011589008 A CN 202011589008A CN 112629192 A CN112629192 A CN 112629192A
Authority
CN
China
Prior art keywords
cavity
box body
opening
door
rails
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011589008.8A
Other languages
Chinese (zh)
Inventor
丁炜
蒋正龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NANJING YONGLIANG FURNACE CO LTD
Original Assignee
NANJING YONGLIANG FURNACE CO LTD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NANJING YONGLIANG FURNACE CO LTD filed Critical NANJING YONGLIANG FURNACE CO LTD
Priority to CN202011589008.8A priority Critical patent/CN112629192A/en
Publication of CN112629192A publication Critical patent/CN112629192A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/10Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in the open air; in pans or tables in rooms; Drying stacks of loose material on floors which may be covered, e.g. by a roof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001Drying-air generating units, e.g. movable, independent of drying enclosure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06Controlling, e.g. regulating, parameters of gas supply
    • F26B21/10Temperature; Pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06Chambers, containers, or receptacles
    • F26B25/063Movable containers or receptacles, e.g. carts, trolleys, pallet-boxes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/06Chambers, containers, or receptacles
    • F26B25/14Chambers, containers, receptacles of simple construction
    • F26B25/18Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
    • F26B25/185Spacers; Elements for supporting the goods to be dried, i.e. positioned in-between the goods to build a ventilated stack

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The invention discloses a double-chamber crude selenium drying device, which comprises a box body with a partition board divided into independent double chambers, wherein the box body section where each chamber is arranged is respectively provided with: the device comprises a door opening for entering and exiting the cavity, an opening and closing door for opening and closing the door opening, an air inlet pipe and an exhaust pipe communicated with the cavity, a temperature measuring element for measuring the temperature of the cavity, a heating element for heating the cavity and a hot air circulating device for circulating hot air to the cavity; the outer wall of the box body is provided with a double-chamber electric control device which is electrically connected with and controls the temperature measuring element, the heating element and the hot air circulating device; two parallel rails are respectively installed on the lower edge of each door opening, the rails extend out of the box body and enter the cavity of the box body, and when the opening and closing door is closed, the opening and closing door is positioned above the rails; the material trolley is characterized by further comprising a material trolley with rollers at the bottom, the rollers are in rolling connection with the rails, and the material trolley enters and exits the cavity through the rails. The invention has the advantages of uniform and adjustable temperature in the oven, labor-saving charging and discharging and high drying speed.

Description

Double-chamber crude selenium drying device
Technical Field
The invention relates to a double-chamber crude selenium drying device.
Background
In the existing crude selenium drying device, each oven only has one chamber, when a large amount of crude selenium needs to be baked, the problem that the oven is not enough is faced, so that more ovens need to be purchased, and the cost is increased and the occupied area is increased. In addition, the existing crude selenium oven is not provided with a track and a movable skip, the material rack is fixed in the oven, and the material trays are moved into and out of the oven one by manpower, which is laborious; and the crude selenium is put into a material tray for baking, so that the problem that the baking effect is influenced due to the excessively thick material thickness exists. The existing crude selenium oven has a simple structure, and the cold and heat in the oven are not uniform in the baking process, so that the drying time and the drying effect are influenced.
Disclosure of Invention
In order to solve the problems of uneven temperature, labor waste in loading, low drying efficiency and poor effect in the drying oven, the invention provides a double-chamber crude selenium drying device.
The invention relates to a double-chamber crude selenium drying device, which comprises a box body which is divided into independent double chambers by a partition plate, wherein the box body section where each chamber is arranged is respectively provided with: the device comprises a door opening for entering and exiting the cavity, an opening and closing door for opening and closing the door opening, an air inlet pipe and an exhaust pipe communicated with the cavity, a temperature measuring element for measuring the temperature of the cavity, a heating element for heating the cavity and a hot air circulating device for circulating hot air to the cavity; the outer wall of the box body is provided with a double-chamber electric control device which is electrically connected with the temperature measuring element, the heating element and the hot air circulating device and controls the temperature measuring element, the heating element and the hot air circulating device; two parallel rails are respectively arranged on the lower edge of each door opening of the double-cavity, the rails extend out of the box body and enter the cavity of the box body, and when the opening and closing door is closed, the opening and closing door is positioned above the rails; the material trolley is characterized by further comprising a material trolley with rollers at the bottom, the rollers are in rolling connection with the rails, and the material trolley enters and exits the cavity through the rails. Therefore, the drying oven has the advantages of uniform temperature in the drying oven, labor saving in charging and good drying effect.
In order to realize uniform temperature in the drying device, the box body comprises a shell, and a heat preservation layer and an inner liner plate which are sequentially arranged on the inner side of the shell, the heat preservation layer and the inner liner plate are also sequentially arranged on two side surfaces of the partition plate, and the opening and closing door comprises a door panel, and the heat preservation layer and the inner liner plate which are sequentially arranged on the inner side of the door panel; the hot air circulating device comprises an air deflector and a circulating fan, the air deflector is door-shaped and is arranged in the cavity in a hanging manner, a top plate of the door-shaped air deflector is opposite to an inner container plate at the top of the cavity, two side plates of the air deflector are respectively opposite to the inner container plates at two sides of the cavity, which are parallel to the track, and a space is reserved between the air deflector and the inner container plates to form an air channel; the circulating fan comprises a motor, a fan shaft connected with the motor and an impeller connected with the fan shaft, the motor is arranged at the top of the box body, a through hole is formed in the top of the box body, the fan shaft penetrates through the through hole, and the impeller is positioned in the cavity; the heating elements are a plurality of heating pipes, penetrate through the top of the box body and extend into the space between the side plate of the air deflector and the inner container plate opposite to the side plate. The box body structure ensures excellent heat preservation effect, and the impeller of the hot air circulating device uniformly diffuses hot air heated by the heating pipe to all positions of the cavity through the air duct so as to make the temperature of all positions of the cavity uniform.
In order to firmly fix the air deflector, a plurality of through holes are formed in the two side plates of the air deflector, a plurality of screw holes are formed in the corresponding positions of the inner container plate opposite to the two side plates, and the air deflector and the inner container plate are fixedly connected through bolts.
In order to improve the working efficiency of the drying device, the opening and closing door is a manual single-door opening; the temperature measuring element is a temperature measuring thermocouple and is positioned on the box body on the opposite side of the opening and closing door and extends into the cavity of the box body from the outside of the box body; the air inlet pipe is positioned at the lower part of the box body and communicated with the cavity of the box body, and the air outlet pipe is positioned at the top of the box body and communicated with the cavity of the box body.
In order to facilitate the material vehicle to come in and go out and not influence the baking effect as far as possible, two grooves are arranged on the lower edge of the door opening of each chamber, two rails are respectively arranged in the grooves, and the highest point of each rail is lower than the lower edge of the door opening.
In order to improve the drying efficiency, the skip car is a multilayer bracket car, and a material tray for containing materials is placed on each layer of bracket.
Has the advantages that: the invention adopts the drying device with double-chamber conjoined structure, thus reducing the occupied area; the double chambers are respectively matched with the independent heating device, the temperature measuring element and the hot air circulating device, so that the temperature in the chambers is uniform, and the baking effect is improved; the wind deflector is fixed on the inner container plate by bolts, so that the mounting firmness of the wind deflector is improved; the double chambers are respectively matched with the independent bracket skip car, the material tray and the track, so that the skip car can conveniently enter and exit the chamber and the material drying efficiency is improved; the operation is more convenient by installing a double-chamber electric control device on the outer wall of the box body.
Drawings
Fig. 1 is a front view of a drying apparatus of the present invention;
fig. 2 is a side view of the drying apparatus of the present invention;
FIG. 3 is a top view of the drying apparatus of the present invention;
in the figure, 1, a housing; 2. a heat-insulating layer; 3. an inner container plate; 4. an air deflector; 5. a heating element; 6. a hot air circulating device; 7. opening and closing the door; 8. an air inlet pipe; 9. an exhaust pipe; 10. a temperature measuring element; 11. a dual chamber electrical control device; 12. a skip car; 13. a track.
Detailed Description
The technical solution of the present invention is described in detail by the following examples, but the scope of the present invention is not limited to the examples.
Examples
The utility model provides a two thick selenium drying device of room, separates into the box of independent two chambeies including having the baffle, sets up respectively on the box section at every cavity place: the device comprises a door opening for entering and exiting the cavity, an opening and closing door 7 for opening and closing the door opening, an air inlet pipe 8 and an exhaust pipe 9 communicated with the cavity, a temperature measuring element 10 for measuring the temperature of the cavity, a heating element 5 for heating the cavity and a hot air circulating device 6 for circulating hot air of the cavity; a double-chamber electric control device 11 is arranged on the outer wall of the box body and is electrically connected with and controls the temperature measuring element 10, the heating element 5 and the hot air circulating device 6; two parallel rails 13 are respectively arranged on the lower edge of each door opening of the double-cavity, the rails 13 extend out of the box body and enter the cavity of the box body, and when the opening and closing door 7 is closed, the opening and closing door 7 is positioned above the rails 13; the device also comprises a skip car 12 with rollers at the bottom, the rollers are in rolling connection with the track 13, and the skip car 12 enters and exits the chamber through the track 13.
The box body comprises a shell 1, and a heat preservation layer 2 and an inner container plate 3 which are arranged on the inner side of the shell 1 in sequence, wherein the heat preservation layer 2 and the inner container plate 3 are also arranged on two sides of the partition plate in sequence, and the opening and closing door 7 comprises a door panel, and the heat preservation layer 2 and the inner container plate 3 which are arranged on the inner side of the door panel in sequence.
The shell 1 is formed by welding a Q235 steel skeleton and a Q235 delta 2mm steel plate, and the surface of the shell is sprayed with paint for corrosion prevention. The insulating layer 2 is made of high-quality aluminum silicate fiber and has the advantages of small heat storage capacity and good heat preservation. The inner container plate 3 and the partition plate are both made of stainless steel SUS 316L.
The hot air circulating device 6 comprises an air deflector 4 and a circulating fan, wherein the air deflector 4 is door-shaped and is arranged in the cavity in a hanging mode, a top plate of the door-shaped air deflector 4 is opposite to the inner container plate 3 at the top of the cavity, two side plates of the air deflector 4 are respectively opposite to the inner container plates 3 at two sides of the cavity, which are parallel to the track 13, and a space is reserved between the air deflector 4 and the inner container plates 3 to form an air channel. The air deflector 4 is provided with a plurality of through holes on the two side plates, a plurality of screw holes are arranged on the corresponding positions of the inner container plate 3 opposite to the two side plates, and the air deflector 4 and the inner container plate 3 are fixedly connected through bolts. Of course, in other embodiments, the bracket may be disposed on the inner container plate, and the air guiding plate is fixedly mounted on the bracket.
The circulating fan comprises a motor, a fan shaft connected with the motor and an impeller connected with the fan shaft, the motor is installed at the top of the box body, a through hole is formed in the top of the box body, the fan shaft penetrates through the through hole, and the impeller is located in the cavity. Each chamber is provided with a 1.5Kw centrifugal fan, strong convection circulation is carried out on gas in the drying device, and the materials of a fan shaft and an impeller are stainless steel SUS 321.
The heating element 5 is a plurality of heating pipes, a plurality of through holes are formed in the top of the box body, the heating pipes penetrate through the through holes and extend into the cavity between the side plate of the door-shaped air deflector 4 and the inner container plate 3 opposite to the side plate, the wiring end of each heating pipe is located on the top of the box body, and a protective cover is arranged on the outer side of the wiring end of each heating pipe. The outer tube of the heating tube is a seamless tube made of SUS321 material, and the inner heating wire is made of high-temperature resistance alloy wire (material 0Cr20Ni 80) into a U-shaped stainless steel heating tube.
The temperature measuring element 10 is a temperature measuring thermocouple and is positioned on the box body on the opposite side of the opening and closing door 7. And a through hole is formed in the box body on the opposite side of the opening and closing door 7, and the temperature thermocouple penetrates into the cavity from the through hole. The air inlet pipe 8 is positioned on the side wall of the lower part of the box body and communicated with the cavity of the box body, and the air outlet pipe 9 is positioned on the top of the box body and communicated with the cavity of the box body.
A backpack type electric control cabinet is arranged on the outer side wall of the box body, and a double-chamber electric control device 11 which is used for being electrically connected with and controlling the heating elements 5, the temperature measuring elements 10 and the hot air circulating devices 6 is arranged in the backpack type electric control cabinet. The dual-chamber electrical control device 11 is formed by combining two conventional control devices for controlling electrical components in the oven, and controls the electrical components in the two chambers respectively. The temperature control instrument in the dual-chamber electric control device 11 can be, for example, a japanese soil-rich intelligent instrument, and has proportional-integral-derivative (PID) adjustment function, overtemperature acousto-optic alarm function, and the like.
The door opening of the double-cavity chamber is positioned on the same side surface of the two cavity chambers, the opening and closing door 7 is a manual single-opening door, and the periphery of the door edge adopts high-quality asbestos ropes as sealing elements to seal the door opening. Two parallel grooves are respectively formed in the lower edge of each door opening, guide rails are installed in the two grooves to form two parallel rails 13, the highest point of each rail 13 is lower than the lower edge of each door opening, the rails 13 extend out of the box body and enter the cavity of the box body, and when the opening and closing door 7 is closed, the opening and closing door 7 is located above the rails 13.
The skip car 12 is a multilayer bracket car, the number of the rollers is four, and a material tray for containing materials is placed on each layer of bracket. The skip 12 and the tray are both made of stainless steel material, and the material is SUS 321. Each chamber is equipped with a skip car and 10 trays.
In actual operation, a workpiece to be processed is placed on a material tray of the material trolley 12, after the workpiece is loaded, the material trolley 12 is pushed into a cavity of the drying device through the rail 13, and then the opening and closing door 7 is manually closed. Then, a double-chamber electric control device 11 is used for controlling the heating element 5 to heat and starting a hot air circulating device 6, so that the furnace temperature reaches the temperature for drying the materials, and the uniformity of the indoor temperature is ensured through hot air circulation. In the process, the temperature measuring element 10 continuously feeds back a temperature signal, and accordingly the dual-chamber electric control device 11 is controlled to continuously adjust the temperature of the chamber. In the heating and drying process, the air inlet pipe 8 and the exhaust pipe 9 are opened as required, fresh air enters from the air inlet pipe 8, and waste gas is discharged from the exhaust pipe 9. After heating is completed, the heating element 5 and the hot air circulating device 6 are closed, the opening and closing door 7 is opened to pull out the workpiece, and the treated material is unloaded and then is reloaded for a new drying process.
The above-mentioned techniques not specifically mentioned refer to the prior art.
As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (6)

1. The utility model provides a two thick selenium drying device of room, its characterized in that separates into the box of independent two chambeies including having the baffle, sets up respectively on the box section at every cavity place: the device comprises a door opening for entering and exiting the cavity, an opening and closing door for opening and closing the door opening, an air inlet pipe and an exhaust pipe communicated with the cavity, a temperature measuring element for measuring the temperature of the cavity, a heating element for heating the cavity and a hot air circulating device for circulating hot air to the cavity;
the outer wall of the box body is provided with a double-chamber electric control device which is electrically connected with the temperature measuring element, the heating element and the hot air circulating device and controls the temperature measuring element, the heating element and the hot air circulating device;
two parallel rails are respectively arranged on the lower edge of each door opening of the double-cavity, the rails extend out of the box body and enter the cavity of the box body, and when the opening and closing door is closed, the opening and closing door is positioned above the rails;
the material trolley is characterized by further comprising a material trolley with rollers at the bottom, the rollers are in rolling connection with the rails, and the material trolley enters and exits the cavity through the rails.
2. The double-chamber crude selenium drying device according to claim 1, wherein the box body comprises a shell, and a heat preservation layer and an inner container plate which are sequentially arranged on the inner side of the shell, the heat preservation layer and the inner container plate are also sequentially arranged on two side surfaces of the partition plate, and the opening and closing door comprises a door panel, and the heat preservation layer and the inner container plate which are sequentially arranged on the inner side of the door panel; the hot air circulating device comprises an air deflector and a circulating fan, the air deflector is door-shaped and is arranged in the cavity in a hanging manner, a top plate of the door-shaped air deflector is opposite to an inner container plate at the top of the cavity, two side plates of the air deflector are respectively opposite to the inner container plates at two sides of the cavity, which are parallel to the track, and a space is reserved between the air deflector and the inner container plates to form an air channel; the circulating fan comprises a motor, a fan shaft connected with the motor and an impeller connected with the fan shaft, the motor is arranged at the top of the box body, a through hole is formed in the top of the box body, the fan shaft penetrates through the through hole, and the impeller is positioned in the cavity; the heating elements are a plurality of heating pipes, penetrate through the top of the box body and extend into the space between the side plate of the air deflector and the inner container plate opposite to the side plate.
3. The double-chamber crude selenium drying device according to claim 2, wherein the air deflector is provided with a plurality of through holes on two side plates, a plurality of screw holes are provided on corresponding positions of the inner container plate opposite to the two side plates, and the air deflector and the inner container plate are fixedly connected through bolts.
4. The double-chamber crude selenium drying device according to any one of claims 1 to 3, wherein the opening and closing door is a manual single-opening door; the temperature measuring element is a temperature measuring thermocouple and is positioned on the box body on the opposite side of the opening and closing door and extends into the cavity of the box body from the outside of the box body; the air inlet pipe is positioned at the lower part of the box body and communicated with the cavity of the box body, and the air outlet pipe is positioned at the top of the box body and communicated with the cavity of the box body.
5. The double-chamber crude selenium drying device according to any one of the claims 4, wherein two grooves are provided at the lower edge of each chamber door opening, two rails are respectively installed in the grooves, and the highest point of the rails is lower than the lower edge of the door opening.
6. The double-chamber crude selenium drying device according to any one of the claims 5, wherein the skip car is a multi-layer carriage car, and trays for holding materials are placed on each layer of carriage.
CN202011589008.8A 2020-12-29 2020-12-29 Double-chamber crude selenium drying device Pending CN112629192A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011589008.8A CN112629192A (en) 2020-12-29 2020-12-29 Double-chamber crude selenium drying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011589008.8A CN112629192A (en) 2020-12-29 2020-12-29 Double-chamber crude selenium drying device

Publications (1)

Publication Number Publication Date
CN112629192A true CN112629192A (en) 2021-04-09

Family

ID=75286160

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011589008.8A Pending CN112629192A (en) 2020-12-29 2020-12-29 Double-chamber crude selenium drying device

Country Status (1)

Country Link
CN (1) CN112629192A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113513885A (en) * 2021-06-28 2021-10-19 重庆江电电力设备有限公司 Welding flux drying machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113513885A (en) * 2021-06-28 2021-10-19 重庆江电电力设备有限公司 Welding flux drying machine

Similar Documents

Publication Publication Date Title
CN103540734A (en) Air circulating gas furnace
CN112629192A (en) Double-chamber crude selenium drying device
CN214537153U (en) Double-chamber crude selenium drying device
CN104482756A (en) Vertical type vacuum debinding furnace
CN215757507U (en) Automatic production line device of sealed box type heat treatment multipurpose furnace
CN107815531B (en) Large-scale structure heat treatment equipment
CN211522263U (en) Solid smelting furnace and metal hot processing production line
US3447790A (en) Aluminum annealing furnace
CN203602670U (en) Air circulation gas furnace
CN114251927B (en) Water-electricity mixed rapid high-vacuum oven and working method thereof
CN111172492B (en) Device and method for gear surface carburization
CN205156563U (en) Continuous drying furnace of honeycomb type catalyst
CN202452832U (en) In-furnace gas circulated and cooled high-temperature heating furnace
CN202452821U (en) Mesh belt type nitrogen protected sintering production line
CN208896337U (en) A kind of pre-add hot stove
CN110628996A (en) Metal hot working production line and use method
CN220567846U (en) Multifunctional aluminum alloy test furnace
CN218583700U (en) Drying machine for worm
CN211120664U (en) Novel energy-saving shuttle kiln convenient to ventilate
CN214039541U (en) Distillation furnace
CN211510381U (en) Hot air rotary furnace for bread processing
CN210079992U (en) Large-span wind-heat device
CN219898952U (en) Powder material sample plate drying device
CN103757573B (en) Push disc type aluminum alloy solution and aging heat treatment production line and production process thereof
CN210826318U (en) Box type carburizing nitriding furnace

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination