阅读说明：本技术 无马弗罐预抽真空气氛保护炉 (Muffle-tank-free pre-vacuumizing atmosphere protection furnace ) 是由 李金龙 于 2020-06-23 设计创作，主要内容包括：本发明公开了无马弗罐预抽真空气氛保护炉,包括设备主体,设备主体包括保温层、工件、炉外料车、水平运行料车前轮、水平运行驱动后轮,设备主体的一端设置有升降气缸旋转座,升降气缸旋转座的两端设置有气缸座横梁,气缸座横梁的下方设置有侧面导轨固定框架,侧面导轨固定框架的内部设置有升降炉门导轮,升降炉门导轮远离侧面导轨固定框架的一端设置有炉门,保温层的上方设置有充气系统,保温层的外表面设置有密闭式炉壳。本发明的无马弗罐预抽真空气氛保护炉普通,低成本,且淬火产品质量和真空炉相当。(The invention discloses a muffle-tank-free pre-vacuumizing atmosphere protection furnace which comprises an equipment main body, wherein the equipment main body comprises a heat insulation layer, a workpiece, a furnace external skip car, a horizontally-operated skip car front wheel and a horizontally-operated driving rear wheel, a lifting cylinder rotating seat is arranged at one end of the equipment main body, cylinder seat cross beams are arranged at two ends of the lifting cylinder rotating seat, a side guide rail fixing frame is arranged below the cylinder seat cross beams, a lifting furnace door guide wheel is arranged inside the side guide rail fixing frame, a furnace door is arranged at one end, far away from the side guide rail fixing frame, of the lifting furnace door guide wheel, an inflation system is arranged above the heat insulation layer, and a closed furnace shell is arranged on. The muffle-tank-free pre-vacuumizing atmosphere protection furnace is common and low in cost, and the quality of a quenching product is equivalent to that of a vacuum furnace.)

1. No muffle tank is vacuum atmosphere protection stove in advance, its characterized in that: comprises an equipment main body (1), wherein the equipment main body (1) comprises a heat-insulating layer (7), a workpiece (11), an external furnace skip car (13), a horizontally-operated material car front wheel (19) and a horizontally-operated driving rear wheel (21), one end of the equipment main body (1) is provided with a lifting cylinder rotating seat (2), two ends of the lifting cylinder rotating seat (2) are provided with cylinder seat cross beams (3), a side guide rail fixing frame (4) is arranged below the cylinder seat cross beams (3), a lifting furnace door guide wheel (5) is arranged inside the side guide rail fixing frame (4), one end, far away from the side guide rail fixing frame (4), of the lifting furnace door guide wheel (5) is provided with a furnace door (6), an air inflation system (8) is arranged above the heat-insulating layer (7), and the outer surface of the heat-insulating layer (7) is provided with a, a furnace door rubber ring sealing flange (10) is arranged between the furnace door (6) and the heat preservation layer (7), a vertical lifting system (12) is arranged at one end, close to a workpiece (11), of the furnace external skip car (13), a vacuumizing system (15) is arranged at one side, far away from the furnace door (6), of the closed furnace shell (9), an air discharging system (16) is arranged between the vacuumizing system (15) and the closed furnace shell (9), a horizontal running track (17) is arranged below the closed furnace shell (9), a quenching liquid tank (18) is arranged below a front wheel (19) of the horizontal running skip car, and a horizontal running speed reduction motor (20) is arranged at the bottom end, far away from the workpiece (11), of the furnace external skip car (13), close to a horizontal running driving rear wheel (21).

2. The muffle-tank-free pre-evacuated atmosphere protection furnace of claim 1, wherein: the muffle-tank-free pre-vacuumizing atmosphere protection furnace is installed on the ground, the muffle-tank-free pre-vacuumizing atmosphere protection furnace is a box-type externally-closed vacuumizing furnace body, and the furnace door (6) adopts a special design structure to realize vacuum sealing of the furnace door (6) and the furnace body through a cylinder.

3. The muffle-tank-free pre-evacuated atmosphere protection furnace of claim 1, wherein: the vacuum-pumping system (15) can be designed into a one-stage vacuum-pumping system mechanical pump, a two-stage vacuum-pumping system Roots pump and a mechanical pump vacuum-pumping system, and the ultimate vacuum of the vacuum-pumping system (15) can reach 6.7X10-1 Pa.

4. The muffle-tank-free pre-evacuated atmosphere protection furnace of claim 1, wherein: the atmosphere protection design of no muffle tank evacuation atmosphere protection stove has inflation system (8) and gassing system (16), the inside design of no muffle tank evacuation atmosphere protection stove has pressure sensor, gas flow control valve, stop valve, gassing flow control valve, gassing stop valve etc..

5. The muffle-tank-free pre-evacuated atmosphere protection furnace of claim 1, wherein: the muffle-tank-free pre-vacuumizing atmosphere protection furnace is designed with an automatic material taking trolley, the automatic material taking trolley can move in the horizontal direction along a horizontal running track (17) to take materials, the automatic material taking trolley is designed with a track running vertically, the automatic material taking trolley can directly descend a workpiece (11) taken out of a heating chamber into a quenching liquid tank (18) to be quenched directly, the whole production process of the muffle-tank-free pre-vacuumizing atmosphere protection furnace is completed by the steps of manually assembling the workpiece (11) on a small vehicle, and the rest production process is completed until automatic alarming and material taking are completed to realize full automatic control.

Technical Field

The invention relates to the field of pre-vacuumizing atmosphere protection furnaces, in particular to a muffle-tank-free pre-vacuumizing atmosphere protection furnace.

Background

The existing box-type resistance furnace is structurally characterized in that resistance heating is carried out in an aerobic state, then the furnace is taken out through a skip car and then is hung outside to quenching liquid for quenching. In the whole heating and quenching process, not only the whole workpiece is oxidized during heating, but also the transfer time is too long, the heat treatment quality is influenced, in addition, the whole process needs manual operation, and the labor cost is higher.

At present, most of heat treatment is developed towards vacuum heat treatment, however, vacuum heat treatment equipment is low-voltage heating, ignition and point release are easy to occur due to vacuum state high-voltage heating, a penetrating point is caused, and a heating body is damaged, so that a heating transformer is required for a vacuum furnace, and the cost of the vacuum furnace is high due to high price of a heater. And the whole furnace body chamber of the vacuum furnace has a double-layer structure, so the furnace body cost is high. The object of the present invention is therefore to find a common box furnace which is low in cost and comparable in quenched product quality to a vacuum furnace.

Disclosure of Invention

The invention mainly aims to provide a muffle-tank-free pre-vacuumizing atmosphere protection furnace, which can effectively solve the problems of high cost and inappropriate quenching product quality and vacuum furnace in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

the muffle-tank-free pre-vacuumizing atmosphere protection furnace comprises an equipment main body, wherein the equipment main body comprises a heat insulation layer, a workpiece, a furnace external skip car, a horizontally-running skip car front wheel and a horizontally-running driving rear wheel, one end of the equipment main body is provided with a lifting cylinder rotating seat, two ends of the lifting cylinder rotating seat are provided with cylinder seat cross beams, a side guide rail fixing frame is arranged below the cylinder seat cross beams, a lifting furnace door guide wheel is arranged inside the side guide rail fixing frame, one end, far away from the side guide rail fixing frame, of the lifting furnace door guide wheel is provided with a furnace door, an inflation system is arranged above the heat insulation layer, the outer surface of the heat insulation layer is provided with a closed furnace shell, a furnace door rubber ring sealing flange is arranged between the furnace door and the heat insulation layer, one end, close to the workpiece, of the furnace external skip car is provided with a vertical lifting, an air discharge system is arranged between the vacuum system and the closed furnace shell, a horizontal running track is arranged below the closed furnace shell, a quenching liquid tank is arranged below the front wheel of the horizontal running material trolley, and a horizontal running speed reduction motor is arranged at the bottom end, far away from the workpiece, of the material trolley outside the furnace and close to the horizontal running driving rear wheel.

Preferably, no muffle tank pre-vacuumizing atmosphere protection furnace is installed on ground, no muffle tank pre-vacuumizing atmosphere protection furnace is a box type externally-closed vacuumizing furnace body, and the furnace door adopts a special design structure to realize vacuum sealing of the furnace door and the furnace body through a cylinder.

Preferably, the vacuum-pumping system can be designed into a one-stage vacuum-pumping system mechanical pump, a two-stage vacuum-pumping system roots pump and a mechanical pumping vacuum system, and the ultimate vacuum of the vacuum-pumping system can reach 6.7X10-1 Pa.

Preferably, the atmosphere protection design of no muffle tank pre-vacuumizing atmosphere protection furnace has an inflation system and an air bleeding system, and the inside design of no muffle tank pre-vacuumizing atmosphere protection furnace has pressure sensor, gas flow control valve, stop valve, bleed flow control valve, bleed stop valve etc..

Preferably, the muffle-tank-free pre-vacuumizing atmosphere protection furnace is designed with an automatic material taking trolley, the automatic material taking trolley can move horizontally along a horizontal running track to take materials, the automatic material taking trolley is designed with a track running vertically, the automatic material taking trolley can directly descend a workpiece taken out of a heating chamber into a quenching liquid tank to be directly quenched, the whole production process of the muffle-tank-free pre-vacuumizing atmosphere protection furnace is completed until automatic alarming and material taking are completed, and full automatic control is achieved.

Compared with the prior art, the invention has the following beneficial effects: this no muffle tank atmosphere protection furnace of taking a vacuum in advance through adopting 380V power heating to and aerating system, gassing system and pressure sensor's joining, make the pressure in the stove keep within the pressure range that needs set for, and then reduce the manufacturing cost of equipment, through design heating system and mixing system in quenching cistern 18, not only make the quenching liquid keep certain temperature during quenching, make the work piece of quenching even through mixing system cooling moreover, further improved product quality.

Drawings

FIG. 1 is a schematic view of the muffle-tank-free pre-evacuation atmosphere protection furnace according to the present invention;

FIG. 2 is a side view of the muffle-free pre-evacuation atmosphere protection furnace of the present invention;

FIG. 3 is a schematic view of the vertical lift system of the muffle-tank-free pre-evacuation atmosphere protection furnace of the present invention;

FIG. 4 is a schematic view of the evacuation system of the muffle-tank-free pre-evacuation atmosphere protection furnace of the present invention.

In the figure: 1. an apparatus main body; 2. a lifting cylinder rotating seat; 3. a cylinder block cross beam; 4. a side rail fixing frame; 5. lifting the furnace door guide wheel; 6. a furnace door; 7. a heat-insulating layer; 8. an inflation system; 9. a closed furnace shell; 10. a furnace door rubber ring sealing flange; 11. a workpiece; 12. a vertical lift system; 13. a furnace skip car; 15. a vacuum pumping system; 16. an air bleed system; 17. a horizontal running track; 18. a quenching liquid tank; 19. horizontally operating the front wheels of the car; 20. horizontally operating the speed reducing motor; 21. the horizontal motion drives the rear wheels.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the technical scheme of the invention is further elaborated below.

As shown in fig. 1-4, the muffle-tank-free pre-vacuumizing atmosphere protection furnace in the embodiment comprises an apparatus main body 1, wherein the apparatus main body 1 comprises a heat insulation layer 7, a workpiece 11, a furnace skip 13, a horizontally-running material truck front wheel 19 and a horizontally-running driving rear wheel 21, one end of the apparatus main body 1 is provided with a lifting cylinder rotary seat 2, two ends of the lifting cylinder rotary seat 2 are provided with cylinder seat beams 3, a side guide rail fixing frame 4 is arranged below the cylinder seat beams 3, a lifting furnace door guide wheel 5 is arranged inside the side guide rail fixing frame 4, one end of the lifting furnace door guide wheel 5, which is far away from the side guide rail fixing frame 4, is provided with a furnace door 6, an inflation system 8 is arranged above the heat insulation layer 7, the outer surface of the heat insulation layer 7 is provided with a furnace shell closed type furnace shell 9, a furnace door rubber ring sealing flange 10 is arranged between the furnace door 6 and the, a vacuumizing system 15 is arranged on one side of the closed furnace shell 9 far away from the furnace door 6, an air discharging system 16 is arranged between the vacuumizing system 15 and the closed furnace shell 9, a horizontal running rail 17 is arranged below the closed furnace shell 9, a quenching liquid tank 18 is arranged below a front wheel 19 of a horizontal running material trolley, and a horizontal running speed reducing motor 20 is arranged at the bottom end of the material trolley 13 outside the furnace far away from the workpiece 11 and close to a rear wheel 21 of the horizontal running driving.

In the embodiment, the muffle-tank-free pre-vacuumizing atmosphere protection furnace is arranged on the ground, the muffle-tank-free pre-vacuumizing atmosphere protection furnace is a box-type externally-closed vacuumizing furnace body, the furnace door 6 adopts a special design structure to realize vacuum sealing of the furnace door 6 and the furnace body through a cylinder, so that air is conveniently pumped, in order to reduce the manufacturing cost of equipment, the equipment adopts a 380V power supply for heating, and because a discharge point is generated due to high pressure, the heating is not carried out in an atmosphere protection state, a set of inflation system 8 and an deflation system 16 are designed, the inflation system 8 comprises an inflation stop valve and an inflation flow regulating valve, the deflation system 16 also comprises a deflation stop valve and a deflation flow regulating valve, a pressure sensor in the furnace can regulate the pressure in the furnace to be kept within a pressure range required to be set, the muffle-tank-free pre-vacuumizing atmosphere protection furnace is designed with a vacuumizing system 15, the vacuumizing system 15 comprises a vacuum unit, a vacuum valve, a vacuum gauge, a vacuum pipeline and the like, an inflation system 8 and an deflation system 16 are designed in the atmosphere protection design of the muffle-tank-free pre-vacuumizing atmosphere protection furnace, a pressure sensor, a gas flow regulating valve, a stop valve, a deflation flow regulating valve, a deflation stop valve and the like are designed in the muffle-tank-free pre-vacuumizing atmosphere protection furnace, the work of the muffle-tank-free pre-vacuumizing atmosphere protection furnace can be controlled more accurately, the whole production process of the muffle-tank-free pre-vacuumizing atmosphere protection furnace is not required to be manually assembled on a small vehicle, and all the rest production process completion processes are controlled fully until automatic alarming and material taking are achieved.

The closed furnace shell 9 is a box-type structure and is welded by steel plates into a closed structure, the design pressure is 0.12MPa, and the sealing between the furnace body and the furnace door 6 is realized by a sealing rubber ring through the equipment main body 1, the lifting cylinder rotating seat 2, the cylinder seat cross beam 3, the side guide rail fixing frame 4, the lifting furnace door guide wheel 5 and the furnace door rubber ring sealing flange 10. The muffle-free pre-vacuumizing atmosphere protection furnace shell is internally provided with a heat insulation layer 7, a heating belt, a furnace hearth, a thermocouple, bottom heat insulation refractory bricks and the like, the muffle-free pre-vacuumizing atmosphere protection furnace shell is also provided with an automatic operation external furnace skip 13, the external furnace skip 13 is provided with a vertical lifting system 12 and a horizontal operation system, the horizontal operation system comprises a horizontal operation rail 17 arranged on the ground, the horizontal operation of the skip is realized through a horizontal operation front wheel 19, a horizontal operation speed reducing motor 20 and a horizontal operation driving rear wheel 21, the skip is horizontally operated to take materials in the furnace, a quenching liquid tank 18 is provided with a heating system and a stirring system, the quenching liquid can be kept at a certain temperature during quenching, the quenched workpiece 11 can be uniformly cooled through the stirring system, and the product quality is improved.

When the muffle-tank-free pre-vacuumizing atmosphere protection furnace is used, a user needs to manually load a workpiece 11 on a skip car, then the skip car conveys the workpiece 11 to a designated position in the furnace, at the moment, a furnace door is closed, a vacuum valve is opened, a vacuum pump vacuumizes the interior of the furnace to the limit, at the moment, the vacuum valve is closed, an inflation valve and an exhaust valve are opened to adjust the gas flow, heating is started when the pressure in the furnace is constant, after the operation of a heating curve is finished, the inflation valve and the exhaust valve are closed, the furnace door 6 is opened, at the moment, the skip car takes the workpiece 11 out of the furnace body and descends to a designated quenching position, then quenching is carried out on the workpiece 11, and after the quenching cooling time is up, the skip car actively ascends to the designated.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.