CN2115343U

CN2115343U - Inside seal spiral cylinder continuous heat treating furnace

Info

Publication number: CN2115343U
Application number: CN 91219506
Authority: CN
Inventors: 张伟
Original assignee: No10 Design Inst Of Machinery Ministry Of Machine Building & Electronic Indus
Current assignee: No10 Design Inst Of Machinery Ministry Of Machine Building & Electronic Indus
Priority date: 1991-08-02
Filing date: 1991-08-02
Publication date: 1992-09-09

Abstract

The utility model discloses a continuous heat treating furnace with an inner-seal spiral cylinder, which is the improvement of the continuous heat-treating furnace with the spiral cylinder, and comprises a furnace casing, a furnace liner, a heating element and the spiral cylinder. The utility model is characterized in that a feed port adopts a rotary seal feeder to seal and feed continuously, and the discharging end of the spiral cylinder forms a trumpet shape and extends to the outer side of the furnace; a feed end and the discharging end are respectively provided with an end cover and a seal gear ring which are slid correspondingly in the co-axial seal with the spiral cylinder, and the controllable gas which enters into the spiral cylinder only can flow in the spiral cylinder and can not overflow outwards. The utility model retains the advantages of the original continuous heat-treating furnace with the spiral cylinder, such as high automation and uniform work piece heating, also has the advantages of good sealing effect, high furnace temperature uniformity, low gas consumption and good energy conservation, and realizes the purpose that the work piece has the heat treatment through the controllable gas.

Description

Inside seal spiral cylinder continuous heat treating furnace

The utility model belongs to the improvement of screw drum continuous heat-treating drier.

Existing thread drum continuous heat-treating drier claims drum furnace again, is to be widely used in bearing roller, as the Equipment for Heating Processing of steel ball, roller etc.But because of the screw drum discharge port of this stove in stove, high temperature can't carry out mechanical seal between screw drum and immobilized blanking port, furnace lining, the furnace shell of rotation down, and the also unlimited continuously feeding of opening for feed, makes stove stopping property extreme difference.Once in this stove, workpiece was carried out controlled atmosphere thermal treatment, not only the atmosphere consumption is very big, and because of atmosphere is full of burner hearth, metallic heating element and furnace lining material is also had corrosive nature, reduce furnace campaign, make this furnace superintendent be difficult to realize the heat treated purpose of controlled atmosphere since the phase.

Task of the present utility model provide a kind of can realize controlled atmosphere heat treated in sealing screw cylinder continuous heat-treating drier, its screw drum discharge end is horn-like and stretches to outside the stove, its feed end and discharge end be respectively equipped with can with the end difference and a pair of sealing gear ring that can insert coaxial slip relatively of screw drum relatively sliding, opening for feed adopts the rotary seal feeder, the controlled atmosphere that feeds in the screw drum can not outwards be overflowed, reduce air consumption, realized the heat treated purpose of controlled atmosphere; On the other hand,, avoid the corrosive nature of atmosphere, can improve the work-ing life of stove greatly metallic heating element and furnace lining material because of controlled atmosphere only can not flow to burner hearth at screw drum.

The utility model is made up of furnace shell, furnace lining, screw drum etc., it is characterized in that the screw drum discharge end is horn-like and stretches to outside the stove, its bus and the axis angle of cut between 3 ° to 40 °, preferably 5 ° to 15 °, be provided with a screen-wall in the horn-like discharge end, to reduce heat energy to external irradiation; One end of screw drum be provided with can with the end cap of screw drum relatively sliding, use oil lubrication and sealing therebetween, the outside of end cap is provided with the annular cooling water circle; The other end of screw drum is provided with a pair of sealing gear ring that can insert coaxial slip relatively, must there be a half-ring gear and screw drum to be sealedly and fixedly connected on it, second half gear ring links to each other with the blanking material cover sealing and fixing, must have on the half-ring gear in two half-ring gears and establish at least two ring gears, elaxtic seal is housed therebetween, oil immersion asbestos packing preferably, its next door is provided with the annular cooling water circle, to reduce the temperature of elaxtic seal, improve sealing effectiveness; The charging mouth of pipe of stove is provided with the rotary seal feeder, and rotation batching roller and stator thimble on it are positioned on the same axis.Rotate batching roller upper edge axis and have dosing vessel, rotate the every sealing slip in the stator thimble of batching roller and rotate a circle, dosing vessel is just finished the once sealing charging.

Characteristics of the present utility model are except keeping working continuously of former screw drum continuous heat-treating drier, and the level of automation height is outside the advantages such as workpiece homogeneous heating.It is poor mainly also to have overcome screw drum stove sealing effectiveness, can not realize the heat treated shortcoming of controlled atmosphere, and behind the stove employing sealed structure, heat lost by radiation reduces, and temperature uniformity increases, and the controlled atmosphere consumption reduces, and can save energy consumption greatly.Screw drum is no longer established the high temperature steel horse outward not can make controlled atmosphere only flow in screw drum, and metallic heating element and furnace lining material are not subjected to the corrosion of atmosphere, can reduce the cost of stove, improve the life-span of stove.

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

Fig. 1 is one-piece construction figure of the present utility model;

Fig. 2 is the front view of the utility model rotary seal feeder design figure;

Fig. 3 is the A--A sectional view of Fig. 2;

Fig. 4 is the site plan of the rotation batching roller of rotary seal feeder when sending into workpiece in the stove;

Fig. 5 is the sealing gear ring that is connected as a single entity of the utility model and the front view of blanking material cover structure iron;

Fig. 6 is the left view of Fig. 5;

Fig. 7 is the front view of the utility model end cover structure figure;

Fig. 8 is the left view of Fig. 7;

Interior sealing screw cylinder continuous heat-treating drier is by furnace shell (5), furnace lining (6), heating unit (7), screw drum (8), rotary seal feeder (2), end cap (4), and blanking material cover (13), Deng composition, whole body of heater is located at the top of quenching tank (18), screw drum (8) is along the burner hearth horizontal positioned, be supported on roller (16), (19) on, discharge port is horn-like and stretches to outside the stove, its bus and the axis angle of cut are at 8 °, in establish a screen-wall (9), it is connected as a single entity by three claws and screw drum (8), rotates with screw drum (8); The input and output material end (20) of screw drum (8), (21) be respectively equipped with can with the end cap (4) of the coaxial relatively sliding of screw drum (8) and a pair of sealing gear ring (10), (12), it is lubricated to inject molybdenum disulphide grease between the slipping plane of end cap (4) and screw drum (8), the outside is provided with annular cooling water circle (14), with reference to Fig. 7 and Fig. 8, so that the temperature of molybdenum disulphide grease is no more than 80 °; A half-ring gear (10) that seals close gear ring fixedly is connected as a single entity with screw drum (8), another half-ring gear (12) is one with blanking material cover (13) weldering, three ring gears (26), (27), (28) are arranged on it, with reference to Fig. 5 and Fig. 6, oil immersion asbestos packing (11) is housed between ring gear, be used to seal two and insert coaxial two half-ring gears (10) relatively along circumferential slippage, (12), the next door of oil immersion asbestos packing (11) is provided with annular cooling water circle (25), to reduce the temperature of oil immersion asbestos packing (11); Quenching furnance groove (18) inner oil seal is inserted in the lower end of blanking material cover (13).The upper and lower ends of immobilized feed-pipe (3) fixedly is connected as a single entity with rotary seal feeder (2) and end cap (4) respectively, rotary seal feeder (2) is formed by rotating batching roller (22) and stator thimble (23) etc., with reference to Fig. 2 and Fig. 3, rotating batching roller (22) is positioned on the same axis with stator thimble (23), have a dosing vessel (24) on it, be used for dividing small quantities of rotation to bring in the stove workpiece.

When stove is started working, motor (17) drives sprocket wheel (15) makes screw drum (8) begin to rotate, the rotation batching roller (22) of rotary seal feeder (2) is in Fig. 2 and Fig. 3 state, the opening that rotate the dosing vessel (24) on the batching roller (22) this moment just in time aligns with the upper shed of stator thimble (23), after workpiece rolls into dosing vessel (24) along hopper (1), driven by motor is rotated batching roller (22) beginning along common axis Rotate 180 °, makes dosing vessel (24) rotate to the position of Fig. 4.The opening of dosing vessel this moment (24) is just in time aimed at the lower opening of stator thimble (23), workpiece rolls in the screw drum (8) along feed-pipe (3) rapidly automatically, rotate the position that batching roller (22) continues to rotate to Fig. 3 subsequently, beginning seals charging next time, circulate with this, rotating batching roller (22) whenever rotates a circle, finish the once sealing charging, workpiece is divided to be entered in the screw drum (8) in small batches continuously, after, along with the rotation of screw drum (8), workpiece moves forward along screw drum (8) one side heating one side, after arriving discharge end (21), gliding fast falls into quenching tank (18) quenching through blanking material cover (13).In entire work process, the feed end (20) of screw drum (8) inserts the interior relatively sliding of end cap (4) all the time and realizes sealing, two ring gears of the half-ring gear (10) on the discharge end (21) insert between the ring gear of the half-ring gear (12) that oil immersion asbestos packing (11) are housed all the time, and maintenance contacts the relatively sliding sealing with oil immersion asbestos packing (11), the controlled atmosphere that feeds in the screw drum (8) can not outwards be overflowed, realize the heat treated purpose of controlled atmosphere.

Two kinds of sealing methods of screw drum (8) input and output material end (20), (21) also can be changed mutually, or use any method among two kinds.All can make screw drum (8) input and output material end realize sealing, reach the heat treated purpose of feeding controlled atmosphere.

Claims

1, a kind of close screw drum continuous heat-treating drier of being made up of furnace shell, furnace lining, screw drum etc. of interior envelope is characterized in that:

(1) discharge end of screw drum is horn-like and stretches to outside the stove;

(2) end of screw drum be provided with can with the end cap of screw drum relatively sliding, the other end is provided with a pair of sealing gear ring that can insert coaxial slip relatively;

(3) the charging mouth of pipe is provided with the rotary seal feeder.

2, the close screw drum continuous heat-treating drier of envelope in according to claim 1 is characterized in that the described horn-like every bus that stretches to the outer screw drum discharge end of stove and the axis angle of cut of being is between 3 ° to 40 °.

3,, it is characterized in that described being in the horn-like screw drum discharge end that stretches to outside the stove is provided with screen-wall according to claim 1 and 2 described interior sealing screw cylinder continuous heat-treating driers.

4, the close screw drum continuous heat-treating drier of interior envelope according to claim 1 is characterized in that the outside of described end cap is provided with the annular cooling water circle.

5, the close screw drum continuous heat-treating drier of interior envelope according to claim 1 is characterized in that must having in the described sealing gear ring half-ring gear to link to each other with the screw drum sealing and fixing, and another half-ring gear links to each other with the blanking material cover sealing and fixing.

6, the close screw drum continuous heat-treating drier of interior envelope according to claim 1 is characterized in that must having on the half-ring gear in the described a pair of sealing gear ring and establishes at least two ring gears, and joyous shape elaxtic seal is housed therebetween.

7, according to claim 1 and 6 described in the close screw drum continuous heat-treating driers of envelope, the next door that it is characterized in that being equipped with the ring gear of elaxtic seal is provided with the annular cooling water circle.

8, the close screw drum continuous heat-treating drier of interior envelope according to claim 1 is characterized in that the rotation batching roller and the stator thimble of described rotary seal feeder is positioned on the same axis.

9,, it is characterized in that described rotation batching roller upper edge axis has dosing vessel according to claim 1 and the close screw drum continuous heat-treating drier of 8 described interior envelopes.