CN203904440U

CN203904440U - Nitriding furnace

Info

Publication number: CN203904440U
Application number: CN201420291806.6U
Authority: CN
Inventors: 叶玉芳
Original assignee: ZHEJIANG SHANGDING INDUSTRIAL FURNACE Co Ltd
Current assignee: ZHEJIANG SHANGDING INDUSTRIAL FURNACE Co Ltd
Priority date: 2014-06-03
Filing date: 2014-06-03
Publication date: 2014-10-29
Anticipated expiration: 2024-06-03

Abstract

The utility model relates to a nitriding furnace. The nitriding furnace comprises a furnace body, an operable or closable furnace lid located above the furnace body and having a sealing effect, a sleeve arranged inside the cavity of the furnace lid and a gas duct arranged on the furnace lid and used for discharging gas, wherein a nitriding salt solution is accommodated inside the furnace body, the furnace lid comprises a cavity surrounded by side walls of the furnace lid, a salt adding inlet is formed in the furnace lid, and the gas duct is communicated with the side wall of the salt adding inlet; the bottom end of the sleeve extends into the solution, the upper end of the sleeve is placed in the salt adding inlet, and the space between the bottom of the salt adding inlet and the outer wall of the sleeve is sealed; the upper part of the sleeve is communicated with the salt adding inlet by virtue of the side wall of the sleeve and the lower part of the sleeve is communicated with the cavity of the furnace lid by virtue of the side wall of the sleeve. According to the nitriding furnace disclosed by the utility model, when a base salt or an adjusting salt is added from the salt adding inlet, by virtue of the sleeve, the base salt or adjusting salt is directly thrown into the solution in the furnace body, the produced gas makes the solution to be turned over, the temperature of the furnace is more uniform, the melting of the base salt or adjusting salt is accelerated, and the production efficiency is improved; the nitriding furnace has the advantages of simple structure and reasonable design and is economical and practical.

Description

A kind of nitriding furnace

Technical field

The utility model relates to a kind of heat treatment furnace, particularly relates to a kind of nitriding furnace.

Background technology

In nitriding or nitrogen-carbon cocementing process, part is placed in the nitriding furnace that melting base salt is housed and carries out, can there is chemical reaction in base salt, produce a large amount of ammonias, containing toxic substances such as the prussiates of cyanogen root under the high temperature of 500 DEG C of left and right, and operator can produce certain harm to health in the time of work, particularly in technological process because workpiece is taken out of, workpiece reacts with salt bath and the factor such as salt bath volatilization, in nitriding furnace, the volume of nitrogenize salt bath can reduce gradually, liquid level can decline, need in nitriding furnace, add corresponding base salt or adjust salt, rising salt bath liquid level, in launch process, base salt or a large amount of toxic gas and the dust of adjustment salt meeting abrupt release, wherein also comprise the steam of saline solution volatilization, toxic gas and dust can discharge by salt adding mouth at short notice, affect the healthy of workpeople, simultaneously, traditional nitriding furnace in the time adding base salt or adjust salt in stove, base salt or adjustment salt react with solution surface, cause temperature inequality in stove, base salt or adjustment salt melting speed are slow, reduce working efficiency.

Utility model content

The purpose of this utility model is to provide a kind of nitriding furnace, efficiently solve traditional nitriding furnace slow, ineffective problem of melting speed in the time adding base salt or adjust salt, simple in structure, reasonable in design, economical and practical, can effectively avoid toxic gas to discharge from salt adding mouth, for operator provide the Working environment of a safety.

To achieve these goals, the technical solution of the utility model is as follows: a kind of nitriding furnace, comprise body of heater, be located at the bell that can open or close and seal on body of heater, in described body of heater, be loaded with nitridation salt solution, bell comprises a cavity being surrounded by its sidewall, this bell is provided with salt adding mouth, it is characterized in that: also comprise the sleeve being arranged in bell cavity and be arranged on the air channel for gaseous emission on bell, this air channel communicates with described salt adding mouth sidewall; The bottom of described sleeve stretches in solution, and its upper end is placed in described salt adding mouth place, between this salt adding mouth bottom and sleeve outer wall, seals; Described upper cartridge communicates with described salt adding mouth by its sidewall, and lower cartridge communicates with described bell cavity by its sidewall, and gas enters in sleeve and rises through bell cavity and enters air channel discharge by sleeve lateral wall.

As improvement, described lower cartridge sidewall offers some air inlet ports, upper cartridge sidewall offers some production wells, and forms annular gas passage between this upper cartridge and described salt adding mouth, and the gas being entered in sleeve by air inlet port enters in gas passage by production well.

As improvement, described sleeve entirety is positive taper and is arranged in described bell cavity.

The beneficial effects of the utility model are:

The utility model in bell cavity, is provided with positive tapered sleeve and sleeve bottom stretches in solution, base salt or adjustment salt add and directly throw in to body of heater solution by sleeve from salt adding mouth, the gas producing seethes solution, furnace temperature is more even, accelerate base salt or adjust salt melting, enhance productivity, simultaneously, the gas producing in body of heater need to the air inlet port in sleeve lateral wall enters in sleeve is discharged by air channel in production well enters gas passage again, extend the residence time of gas in nitriding furnace, effectively avoid toxic gas to discharge from salt adding mouth, for operator provide the Working environment of a safety.The utility model is simple in structure, reasonable in design, economical and practical.

Brief description of the drawings

Below in conjunction with accompanying drawing, the utility model is described further:

Fig. 1 is structural representation of the present utility model.

Embodiment

Embodiment 1

As shown in Figure 1, a kind of nitriding furnace, comprise body of heater 1, be located at the bell 2 that can open or close and seal on body of heater 1, be arranged on the sleeve 3 in bell 2 cavitys and be arranged on the air channel 4 for gaseous emission on bell 2, in described body of heater 1, be loaded with nitridation salt solution, bell 2 comprises a cavity being surrounded by its sidewall 21, this bell 2 is provided with salt adding mouth 22, and described air channel 4 communicates with described salt adding mouth 22 sidewalls; The bottom of described sleeve 3 stretches in solution, and its upper end is placed in described salt adding mouth 22 places, between these salt adding mouth 22 bottoms and sleeve 3 outer walls, seals, and between sleeve 3 tops and described salt adding mouth 22, forms annular gas passage 5; Described sleeve 3 tops communicate with described salt adding mouth 22 by its sidewall, and sleeve 3 bottoms communicate with described bell 2 cavitys 21 by its sidewall.

Described sleeve 3 entirety are positive taper and are arranged in described bell 2 cavitys 21, these sleeve 3 lower sides offer some air inlet ports 31, sleeve 3 upper portion side wall offer some production wells 32, in nitriding or nitrogen-carbon cocementing process, because workpiece is taken out of, workpiece reacts with salt bath and the factor such as salt bath volatilization, in nitriding furnace, the volume of nitrogenize salt bath can reduce gradually, liquid level can decline, need in nitriding furnace, add corresponding base salt or adjust salt, rising salt bath liquid level, when adding base salt or adjusting salt, positive tapered sleeve 3 is sheathed in salt adding mouth 22, make its bottom deeply to solution, because the temperature in nitriding furnace is 350 DEG C～550 DEG C, base salt or adjustment salt are thrown in along sleeve 3 and are directly thrown to solution from salt adding mouth 22, fully contact with solution, the gas producing when melting seethes solution, thereby make the furnace temperature in nitriding furnace more even, steam and the dust of the toxic gas of body of heater 1 interior generation and saline solution volatilization are entered in sleeve 3 by the air inlet port 31 on sleeve 3 sidewalls, rise and discharged by air channel 4 again in production well 32 enters gas passage 5 along sleeve 3, concentrate and purify, absorb and process, in this process, extend the residence time of gas in body of heater 1, even if operator can cover salt adding mouth 22 after adding base salt or adjusting salt, furnace gas can not discharged from salt adding mouth 22, infringement operator's is healthy, when without adding base salt or adjusting when salt, with instrument by sleeve 3 from the interior taking-up of bell 2, simple to operate, reasonable in design, economical and practical.

Claims

1. a nitriding furnace, comprise body of heater (1), be located at the bell (2) that can open or close and seal on body of heater (1), described body of heater is loaded with nitridation salt solution in (1), bell (2) comprises a cavity being surrounded by its sidewall (21), this bell (2) is provided with salt adding mouth (22), it is characterized in that: also comprise and be arranged on the sleeve (3) in bell (2) cavity (21) and be arranged on the upper air channel (4) for gaseous emission of bell (2), this air channel (4) communicates with described salt adding mouth (22) sidewall, the bottom of described sleeve (3) stretches in solution, and its upper end is placed in described salt adding mouth (22) and locates, and between this salt adding mouth (22) bottom and sleeve (3) outer wall, seals, described sleeve (3) top communicates with described salt adding mouth (22) by its sidewall, sleeve (3) bottom communicates with described bell (2) cavity (21) by its sidewall, and gas also rises and enters air channel (4) discharge by sleeve (3) sidewall in bell (2) cavity (21) enters sleeve (3).

2. a kind of nitriding furnace according to claim 1, it is characterized in that, described sleeve (3) lower sides offers some air inlet ports (31), sleeve (3) upper portion side wall offers some production wells (32), and between this sleeve (3) top and described salt adding mouth (22), form annular gas passage (5), the gas being entered in sleeve (3) by air inlet port (31) enters in gas passage (5) by production well (32).

3. a kind of nitriding furnace according to claim 1, is characterized in that: described sleeve (3) entirety is positive taper and is arranged in described bell (2) cavity (21).