CN2498168Y - Screen continuous carburizing furnace with front and rear exhaust at constant pressure - Google Patents

Abstract

The utility model relates to an improved invention of a metal heat-treating furnace, wherein, a feed inlet (9) and a discharging slideway (11) are arranged on a furnace body (10), a mesh belt (1), a sealing groove (8) and a heating range are arranged in the furnace body, and a quenching bath (14) is disposed at the rear part of the furnace body, the seal liquid (7) is positioned in the sealing groove, a front and a rear pressure-stabilizing exhaust tank (6)(6`) are arranged on the furnace body, and exhaust pipes (4)(4`) are arranged on the front and the rear pressure-stabilizing exhaust tank, and pressure regulating valves (5)(5`) are disposed on the exhaust pipes, a waste tube (12) is arranged on the rear pressure-stabilizing exhaust tank, and is connected with the discharging slideway by a pipeline (13). The utility model overcomes the defects of non homogeneity of furnace atmosphere, instability of pressure and ingredients of the furnace gas, and outside interfering factors on the furnace body of a common mesh belt type continuous carburizing furnace, thus the effective purposes of little consumption of gas-preparing medium, stability of pressure and gas in the furnace and improved product quality can be achieved.

Description

A kind of net belt type continuous acieration furnace with front and back pressure stabilizing exhaust device

The utility model relates to a kind of improvement invention of metallic heat treating furnace, particularly be the invention of exhaust gas emission and furnace atmosphere pressure assembly in the heat treatment furnace, what be specifically related to is a kind of invention of front and back pressure stabilizing exhaust device of net belt type continuous acieration furnace.

In the prior art; net belt type continuous acieration furnace opening for feed generally with in the stove directly communicates; because of furnace sealing poor; furnace gas pressure is low and unstable; the interior waste gas of stove is got rid of smooth and is detained in the stove; because furnace gas pressure is low; the air of invading outside stove can change composition of fumes; infiltration layer lack of homogeneity and carburized depth are not enough; its carburized depth is no more than 0.3mm, and carburizing or protective medium consumption are big, influences the carrying out of technological process; influenced the quality of carburized parts simultaneously, and waste gas, used heat and the dust revealed in the stove pollute to operating environment.

Problem in view of the known technology existence, it is even that the purpose of this utility model aims to provide a kind of cementing furnace furnace atmosphere that makes, furnace gas pressure and stable components, furnace atmosphere is not subject to external interference, the net belt type continuous acieration furnace with front and back pressure stabilizing exhaust device that system gas medium consumption is few and the carburized parts quality is high.

For achieving the above object, the utility model is taked following scheme: a kind of net belt type continuous acieration furnace with front and back pressure stabilizing exhaust device, body of heater is provided with opening for feed and discharging slideway, in body of heater, be provided with guipure, sealing groove and heating zone, rear portion at body of heater is provided with quenching tank, described sealing groove is built-in with sealing liquid, it is characterized in that described body of heater is provided with front and back voltage stabilizing exhaust tank, described front and rear row gas tank is provided with vapor pipe, and on vapor pipe, be provided with relief valve, described back voltage stabilizing exhaust tank is provided with waste pipe, and be connected with the discharging slideway by the corrugated tube on the voltage stabilizing exhaust tank of back, the outside surface of voltage stabilizing exhaust tank is provided with water jacket before described, and described pipeline is a corrugated tube.

Compare with known technology, the utlity model has scientific structure, advantages of simple, easy to implement, stable and reliable operation, infiltration layer is even, and carburized depth increases, carburized parts quality height, characteristics such as environmental benefit is good have thoroughly solved in the stove waste gas to the harmful effect of technological process.According to a kind of net belt type continuous acieration furnace of the utility model design motif made, bring positive result of use will for vast heat treatment process industry with front and back pressure stabilizing exhaust device.

The utility model has following accompanying drawing:

Fig. 1 is the new structure principle chart of this practicality.

Accompanying drawing has been represented structure of the present utility model and embodiment, further describe each relevant details and principle of work of embodiment below more in conjunction with the accompanying drawings, the body of heater of this cementing furnace (10) is provided with opening for feed (9) and discharging slideway (11), in body of heater (10), be provided with guipure (1), sealing groove (8) and heating zone (not shown), be provided with quenching tank (14) at the rear portion of body of heater (10), this quenching tank (14) is built-in with quenchant, can quench processed part, be built-in with sealing liquid (7) at described sealing groove (8), described sealing liquid (7) mainly is that body of heater (10) is sealed, be difficult for gas leakage, voltage stabilizing exhaust tank (6) (6 ') before and after on body of heater (1), being provided with, be respectively equipped with vapor pipe (4) (4 ') on the described front and back voltage stabilizing exhaust tank, and on vapor pipe (4) (4 '), be respectively equipped with relief valve (5) (5 '), outside surface at preceding voltage stabilizing exhaust tank (6 ') is provided with water jacket (2), this water jacket (2) mainly is that the heat that body of heater produces is utilized again, plays adiabatic and UTILIZATION OF VESIDUAL HEAT IN effect; Described back voltage stabilizing exhaust tank (6 ') is provided with waste pipe (12), and be connected with discharging slideway (11) by corrugated tube (13), described waste pipe (12) is that the waste gas that produces in the stove is discharged, when processed part is gone up through sealing groove (8) and sealing liquid (7) when entering the heating zone at guipure (1), water oil that attaches on the part and dirt are heated and evaporate into gas, voltage stabilizing exhaust tank (6) and through vapor pipe (4) emptying before the waste gas of discharging in the stove under the draft effect of the vapor pipe (4) on preceding voltage stabilizing exhaust tank (6) enters, because constantly entering of processed part, the control agent consumption control that perhaps adds is improper, the heat and the gas that produce in the body of heater are on the increase, when furnace pressure is increased, pressure in the preceding voltage stabilizing exhaust tank (6) also increases thereupon, because the regulating effect of relief valve (5), vapor pipe (4) flows out tolerance to be increased, when furnace pressure reduces, preceding voltage stabilizing exhaust tank (6) internal pressure reduces, flowing out tolerance from vapor pipe (4) reduces, thereby keep furnace pressure constant within the specific limits all the time, when furnace pressure surpasses certain pressure, explosion-proof head (3) is opened, and relief pressure is to ensure safety.Processed part is with the transmission of guipure (1), enter into quenching tank (14) by discharging slideway (9) and carry out quench cooled, the waste gas of discharging in the steam of water that parts quenching produces or oil and the body of heater, go up under the draft effect of vapor pipe (4 ') after corrugated tube (13) enters voltage stabilizing exhaust tank (6 ') at back voltage stabilizing exhaust tank (6 ') from vapor pipe (4 ') emptying, its principle of work is identical with preceding voltage stabilizing exhaust tank (6), and waste pipe (12) is used for interior water of condensation of back voltage stabilizing exhaust tank (6 ') or oil are got rid of.Present embodiment is under the constant situation of productivity, and the consumption of system gas medium only is original 15-35%, and case depth can reach more than the 0.8mm, and processed part carburizing quality obviously improves, and metallographic structure is qualified, and surface-brightening has the effect of vacuum heat treatment.

Claims (3)

1, a kind of net belt type continuous acieration furnace with front and back pressure stabilizing exhaust device, body of heater (10) is provided with opening for feed (9) and discharging slideway (11), in body of heater (10), be provided with guipure (1), sealing groove (8) and heating zone, and be provided with quenching tank (14) at the rear portion of body of heater (10), described sealing groove (8) is built-in with sealing liquid (7), it is characterized in that described body of heater (10) is provided with front and back voltage stabilizing exhaust tank (6) (6 '), described front and back voltage stabilizing exhaust tank (6) (6 ') is provided with vapor pipe (4) (4 '), and on vapor pipe (4) (4 '), be provided with relief valve (5) (5 '), described back voltage stabilizing exhaust tank (6 ') is provided with waste pipe (12), and is connected with discharging slideway (11) by pipeline (13).

2, a kind of net belt type continuous acieration furnace with front and back pressure stabilizing exhaust device as claimed in claim 1 is characterized in that the outside surface of described preceding voltage stabilizing exhaust tank (6) is provided with water jacket (2).

3, a kind of net belt type continuous acieration furnace with front and back pressure stabilizing exhaust device as claimed in claim 1 is characterized in that the pipeline (13) on the described back voltage stabilizing exhaust tank (6 ') is a corrugated tube.

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