CN202770180U

CN202770180U - Push rod furnace with nitrogen replacing chamber

Info

Publication number: CN202770180U
Application number: CN 201220411063
Authority: CN
Inventors: 李剑平; 王征
Original assignee: WUXI GREEN HEAT-TREATMENT EQUIPMENT Co Ltd
Current assignee: WUXI GREEN HEAT-TREATMENT EQUIPMENT Co Ltd
Priority date: 2012-08-20
Filing date: 2012-08-20
Publication date: 2013-03-06
Anticipated expiration: 2022-08-20

Abstract

The utility model discloses a push rod furnace with a nitrogen replacing chamber. The push rod furnace comprises a hearth, a front furnace door, a back furnace door, a charging tray, a pushing oil cylinder, a material hooking oil cylinder, a feeding frame, a discharging frame, and further comprises a front nitrogen changing chamber and a back nitrogen changing chamber. The front nitrogen replacing chamber is arranged on the inner side of the front furnace door and comprises a front inlet, a front middle furnace door, and a front furnace door shaft sealing cover. The back nitrogen replacing chamber is arranged on the back side of the back furnace door and comprises a back inlet, a back middle furnace door and a back furnace door shaft sealing cover. The front furnace door and the back furnace door are respectively provided with a flexible small door. The push rod furnace with the nitrogen replacing chamber has the advantages that through replacement in the nitrogen changing chamber, air can be sufficiently replaced by nitrogen when the feeding tray goes in and out the hearth so as to prevent the air from entering the hearth, and therefore the air can be isolated completely, the phenomenon of oxidation peeling of parts processed by heat treatment can be avoided, and quality of products can be guaranteed.

Description

A kind of band nitrogen replacement chamber push rod furnace

Technical field

The utility model relates to the push rod furnace of heat treatment industry, particularly a kind of band nitrogen replacement chamber push rod furnace.

Technical background

At heat treatment industry, push rod furnace is a kind of heat-treatment furnace of commonly using, mainly is to send part to enter burner hearth by the pusher oil cylinder, send part to transport burner hearth by the hook material oil cylinder.For fear of in part turnover burner hearth, the outer air of stove also together enters, and cause part decortication of the oxidation in the heat treatment process in burner hearth, and usually in the burner hearth inlet and outlet nitrogen envelope curtain is installed, can in oven door opening, spray nitrogen like this and come blocks air to enter burner hearth.

Existing above-mentioned push rod furnace structure as shown in Figure 1, generally includes burner hearth 1, front fire door 21, rear fire door 22, charging tray 3, pusher oil cylinder 41, hook material oil cylinder 42, feeding rack 51, discharge rack 52, import nitrogen envelope curtain 61, outlet nitrogen envelope curtain 62.Forward and backward structure is identical generally, and namely just the position is different with outlet nitrogen envelope curtain 62 from rear fire door 22, import nitrogen envelope curtain 61 for front fire door 21; Feeding rack 51 and discharge rack 52, pusher oil cylinder 41 and hook material oil cylinder 42 also structural correspondence, just one is used for charging, and one is used for discharging.Fire door 21, import nitrogen envelope curtain 61 were example in the past, their concrete structure such as Fig. 2, shown in Figure 3.

During operation, part is contained in the charging tray, front oven door opening, and the work of import this moment nitrogen envelope curtain, pusher oil cylinder Work Promote charging tray enters in the burner hearth, and the pusher oil cylinder withdraws from, and front fire door is closed, and import nitrogen envelope curtain stops to spray nitrogen; After part heat treatment finished, rear oven door opening exported the work of nitrogen envelope curtain this moment, and the hook material oil cylinder enters in the burner hearth charging tray is ticked burner hearth, and rear fire door is closed, and outlet nitrogen envelope curtain stops to spray nitrogen.

The shortcoming of existing push rod furnace with nitrogen envelope curtain is: in fact come blocks air to enter the poor effect of burner hearth with nitrogen envelope curtain; charging tray is in the turnover burner hearth; although the work of nitrogen envelope curtain is arranged; but always having the small part air together enters in the burner hearth with charging tray and part; air barrier is not thorough, often can cause the part of part heat treatment process the phenomenon that oxidation is peeled to occur.

The utility model content

The technical problems to be solved in the utility model provides a kind of band nitrogen replacement chamber push rod furnace, to overcome the halfway deficiency of the air barrier of mentioning in the above-mentioned background technology.

For achieving the above object, the utility model is achieved through the following technical solutions:

A kind of band nitrogen replacement chamber push rod furnace comprises burner hearth, front fire door, rear fire door, charging tray, pusher oil cylinder, hook material oil cylinder, feeding rack, discharge rack, and aforementioned structure is identical with existing push rod furnace structure with nitrogen envelope curtain; In addition, also comprise front nitrogen replacement chamber, rear nitrogen replacement chamber, wherein front nitrogen replacement chamber is positioned at the inboard of front fire door, comprises front import, front middle fire door, forehearth door-hinge seal closure; Rear nitrogen replacement chamber is positioned at the inboard of rear fire door, comprises rear import, rear middle fire door, rear fire door sealing cover; Usually front nitrogen replacement chamber is all identical with rear nitrogen replacement chamber shape structure.

Especially, be provided with movable wicket on described front fire door, the rear fire door.Such structure is convenient to the push rod on the pusher oil cylinder, the drag hook on the hook material oil cylinder, in the situation that front fire door, rear fire door are closed, also can pass in and out smoothly nitrogen replacement chamber and burner hearth, and is convenient to discharge the indoor air of nitrogen replacement.

Beneficial effect with nitrogen replacement chamber push rod furnace described in the utility model is: by the displacement of nitrogen replacement chamber, in charging tray turnover burner hearth, air is replaced by nitrogen fully, prevented that air from entering burner hearth, namely air barrier is very thorough, thereby the phenomenon of oxidation decortication appears in the part of having avoided heat treatment process, has guaranteed the quality of product.

Description of drawings

Fig. 1 is existing without nitrogen replacement chamber push rod furnace agent structure simplified schematic diagram.

Fig. 2 is existing without fire door P direction structure simplified schematic diagram before the push rod furnace of nitrogen replacement chamber.

Fig. 3 is existing without nitrogen replacement chamber push rod furnace import nitrogen envelope curtain A-A direction structure simplified schematic diagram.

Fig. 4 is the utility model band nitrogen replacement chamber push rod furnace agent structure simplified schematic diagram.

Fig. 5 is fire door P direction structure simplified schematic diagram before the push rod furnace of the utility model band nitrogen replacement chamber.

Wherein Fig. 1 is as follows to the symbol description of Fig. 5:

1, burner hearth, 21, front fire door, 211, movable wicket, 22, rear fire door, 3, charging tray, 41, the pusher oil cylinder, 42, the hook material oil cylinder, 51, feeding rack, 52, discharge rack, 61, import nitrogen envelope curtain, 62, outlet nitrogen envelope curtain, 7, front nitrogen replacement chamber, 71, front import, 72, fire door in the middle of front, 73, forehearth door-hinge seal closure, 8, rear nitrogen replacement chamber, 81, rear import, 82, rear in the middle of fire door, 83, rear fire door sealing cover.

The specific embodiment

Such as Fig. 4, shown in Figure 5, be respectively the utility model band nitrogen replacement chamber push rod furnace main body, front fire door P direction structure simplified schematic diagram.

A kind of band nitrogen replacement chamber push rod furnace comprises burner hearth 1, front fire door 21, rear fire door 22, charging tray 3, pusher oil cylinder 41, hook material oil cylinder 42, feeding rack 51, discharge rack 52, and aforementioned structure is identical with existing push rod furnace structure with nitrogen envelope curtain; In addition, also comprise front nitrogen replacement chamber 7, rear nitrogen replacement chamber 8, wherein front nitrogen replacement chamber 7 is positioned at the inboard of front fire door 21, comprises front import 71, front middle fire door 72, forehearth door-hinge seal closure 73; Rear nitrogen replacement chamber 8 is positioned at the inboard of rear fire door 22, comprises rear import 81, rear middle fire door 82, rear fire door sealing cover 83; Usually front nitrogen replacement chamber 7 is all identical with rear nitrogen replacement chamber 8 shape and structures.

Especially, be provided with movable wicket 211 on described front fire door 21, the rear fire door 22.Such structure is convenient to the push rod on the pusher oil cylinder 41, the drag hook on the hook material oil cylinder 42, in the situation that front fire door 21, rear fire door 22 are closed, also can pass in and out smoothly nitrogen replacement chamber and burner hearth 1, and is convenient to discharge the indoor air of nitrogen replacement.

In the operation process, during charging, part is contained in the charging tray 3, front fire door 21 is opened, charging tray 3 enters front nitrogen replacement chamber 7 by the push rod of pusher oil cylinder 41, front fire door 21 is closed, the displacement chambers are injected in nitrogen the past import 71, and the air that displacement is indoor is discharged from movable wicket 211, and front middle fire door 72 is opened, this moment, 73 assurances of forehearth door-hinge seal closure did not allow air enter, the push rod of pusher oil cylinder 41 works on, and the charging tray 3 that part is housed is shifted onto in the burner hearth 1, and push rod withdraws from front middle fire door 72, fire door 72 is closed in the middle of front, and push rod is got back to initial position; During discharging, the hook material bar of hook material oil cylinder 42 enters rear nitrogen replacement chamber 8, stops to 82 mouthfuls at rear middle fire door, and nitrogen injects the displacement chambers from rear import 81, the air that displacement is indoor is discharged from movable wicket 211, fire door 82 is opened in the middle of rear, and hook material bar is ticked charging tray 3 from burner hearth 1, and rear middle fire door 82 is closed, rear fire door 22 is opened, hook material bar colludes charging tray 3 outside the rear fire door 22, and rear fire door 22 is closed, and the one-stop operation process finishes.

Claims

1. be with nitrogen replacement chamber push rod furnace for one kind, comprise burner hearth (1), front fire door (21), rear fire door (22), charging tray (3), pusher oil cylinder (41), hook material oil cylinder (42), feeding rack (51), discharge rack (52), it is characterized in that: also comprise front nitrogen replacement chamber (7), rear nitrogen replacement chamber (8), wherein front nitrogen replacement chamber (7) is positioned at the inboard of front fire door (21), comprises front import (71), front middle fire door (72), forehearth door-hinge seal closure (73); Rear nitrogen replacement chamber (8) is positioned at the inboard of rear fire door (22), comprises rear import (81), rear middle fire door (82), rear fire door sealing cover (83).

2. band nitrogen replacement as claimed in claim 1 chamber push rod furnace is characterized in that: be provided with movable wicket (211) on described front fire door (21), the rear fire door (22).