CN86203814U

CN86203814U - Electrode-changeable directly started salt bath furnace

Info

Publication number: CN86203814U
Application number: CN 86203814
Authority: CN
Inventors: 林正湛; 芦礼民; 宋效先
Original assignee: LANZHOU PETROLEUM MACHINERY
Current assignee: LANZHOU PETROLEUM MACHINERY
Priority date: 1986-06-07
Filing date: 1986-06-07
Publication date: 1987-05-20

Abstract

The utility model relates to an electrode-changeable directly started salt bath furnace, which is suitable for the heating device used for the single-phase or the three-phase metallothermic processing and the dip soldering. In the existing main electrode directly started embedded type salt bath furnace, the main electrode is embedded in the furnace hearth bricking body, so once any one of the main electrode and the furnace hearth bricking body is damaged, the entire furnace body is scrapped. In the electrode-changeable directly started salt bath furnace, an electrode is put into the furnace hearth along the periphery of the furnace hearth; a vertical electrode handle is arranged in a storage groove on a furnace wall; the gaps are existed between the electrode and the furnace wall and the vertical electrode handle and the furnace wall. A furnace hole which is convenient to be assembled and disassembled is arranged on the opening of the upper part of the furnace hearth, which ensures that the electrode can be changed according to the lifetime need without damaging the furnace body, and the electrode isn't damaged when the furnace body updating.

Description

Electrode-changeable directly started salt bath furnace

The utility model relates to a kind of improved main electrode and directly starts the flush type salt bath furnace, is applicable to single-phase, three phase mains and various operating temperature.

Obtained " main electrode directly starts the flush type salt bath furnace " of in 1983 national third-class invention award, mainly form by shell, flue, masonry of burner hearth, main electrode, electrode handle and stove salt, it is by changing the connecting mode between the electrode handle, can make each main electrode in the loop, become resistor in the black furnace startup temperature rise period and be energized heating, the main electrode heating power makes salt intensification with fixed attention, has saved the starting electrode in the old-fashioned salt bath furnace.But because of its main electrode is to imbed among the masonry of burner hearth, therefore, no matter be main electrode or masonry of burner hearth, as long as one of them damage all can cause whole body of heater to be scrapped.

Task of the present utility model is to provide a kind of improved main electrode directly to start salt bath furnace, and its electrode is not built among the masonry of burner hearth, and can freely change, and makes the life-span of electrode and body of heater be independent of each other.

Task of the present utility model is finished as follows, at this salt bath burner hearth upper end open place, is equipped with that a refractory material makes, simple load and unload fire door.The area that its internal orifice size is surrounded with the electrode medial surface equates or each limit dwindles (10～50) millimeter, to guarantee that heated workpiece is difficult for the collision electrode, also can reduce simultaneously the thermal radiation loss at fire door place, and be the truncated cone of a band shoulder with the fire door bottom that burner hearth upper end joins, so that location when fire door is installed, and can avoid being coagulated between fire door and the furnace wall salt bonding.Be provided with the storage tank of laying the vertical electrode handle on the furnace wall, the size of storage tank should be greater than the vertical electrode handle, with guarantee the vertical electrode handle with between the storage tank should be gapped.

Electrode mild steel manufacturing is for improving also available heat resisting steel manufacturing of life-span.Its cross sectional shape is not limit.According to the layout of size of burner hearth and electrode, with electrode square up shape, the shape of a hoof, plate shaped and arc etc.

Each electrode has two vertical electrode handles, and an end of vertical electrode handle is dead with the electrode weldering, prepares against when starting for one of the other end to connect with the starting copper bar, and another connects mutually by the output of horizontal electrode handle with the salt furnace transformer.Electrode connection is with its vertical electrode handle burner hearth of packing into together, and guarantees the same masonry of burner hearth of electrode, and the vertical electrode handle is with all gapped between its storage tank.Above-mentioned these all are to guarantee the interchangeable necessary condition of electrode.

In order to be short-circuited (joining) between two vertical electrode handles that prevent salt bath furnace same electrode of when starting, to use the hot-face insulation thing between two vertical electrode handles and isolate.

The upper end of each vertical electrode handle is provided with the box of splendid attire low-melting alloy.This connection for low-voltage, high-current provide a kind of not only easily and fast but also safe structure.

Adopt the utility model can economize the starting electrode of the stove that desalts, shorten the starting time, and can change the electrode of damage easily, and do not damage body of heater, reduced the maintenance man-hours and the expense of salt bath furnace, improved benefit.

Below with reference to accompanying drawing the utility model is described in further detail.

Fig. 1 is the cutaway view of a kind of concrete structure of the utility model.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the utility model masonry of burner hearth vertical view.

Fig. 4 is the cutaway view of Fig. 3 along the 2-2 line.

With reference to Fig. 1,2,3,4, this is that a three-phase changeable electrodes directly starts salt bath furnace.Between steel shell (1) and steel furnace (2), fill, to reduce thermal loss with insulation material (9).In steel furnace (2), build system body of heater (3) with refractory material, when building system will the left side of body of heater, on, build out the storage tank (12) of vertical electrode handle (7,8) separately on right three furnace walls, and should guarantee that vertical electrode handle (7,8) has certain clearance in storage tank (12), by the body of heater that above-mentioned requirements puzzles, should fully dry.

Each electrode (4,5,6) is processed by drawing, welding, shaping.The electrode (4,5,6) that processes connection is packed in the body of heater (3) by the diagram requirement with its vertical electrode handle (7,8), and guarantee that three electrodes (4,5,6) have suitable distance each other.For two vertical electrode handles (7,8) of preventing each electrode when the salt stove starts, make short circuit current because of being in contact with one another, between them, put into hot-face insulation thing (13), and fix it.

Fire door (11) with refractory material is made is installed on the body of heater (3), the stove salt of packing in the body of heater.In the box (14,15) of each vertical electrode handle upper end, all should put into enough low-melting alloys, with copper bar the output of the salt furnace transformer horizontal electrode handle (16) with the salt stove is joined, insert respectively in the low-melting alloy box (14) of three electrodes three terminations that Y shape started copper bar, to connect the end of each electrode, make it to form wye-circuit, connect power supply, the startup stage that salt bath furnace can entering.In case stove salt (10) dissolves, when stove salt resistance drops to low pressure and also can make its conducting, with regard to removable startup copper bar, use three U-shaped working copper grates that the low-melting alloy of two vertical electrode handles (7,8) upper end of same electrode is linked up again, salt bath furnace just can enter the operate as normal section of stove salt conductive exothermal.

Claims

1, a changeable electrodes of being made up of steel shell [1], steel furnace [2], masonry of burner hearth [3], electrode [4,5,6], electrode handle [7,8], heat-insulation layer [9] and stove salt [10] directly starts salt bath furnace, it is characterized in that:

Simple load and unload fire door [11] is equipped with in a, burner hearth upper end,

Have the storage tank [12] of laying vertical electrode handle [7,8] on b, the furnace wall,

C, electrode [4,5,6] same masonry of burner hearth [3], vertical electrode handle [7,8] are with all gapped between its storage tank [12].

2, the changeable electrodes by claim 1 regulation directly starts salt bath furnace, it is characterized in that the electrode (4,5,6) made with carbon steel or heat resisting steel can need make square, plate shaped, the shape of a hoof and arc according to installing.

3, the changeable electrodes by claim 1 regulation directly starts salt bath furnace, it is characterized in that will separating with hot-face insulation thing (13) between two vertical electrode handles (7,8) of each electrode.

4, the changeable electrodes by claim 1 regulation directly starts salt bath furnace, it is characterized in that said fire door (11) made by refractory material, the area that the same electrode of its internal orifice size (4,5,6) medial surface surrounds equates or each limit dwindles 10～50 millimeters, and with the truncated cone of the fire door bottom that joins on the burner hearth for the band shoulder.

5, the changeable electrodes by claim 1 or 3 regulations directly starts salt bath furnace, it is characterized in that each vertical electrode handle upper end is shaped on the box (14,15) of splendid attire low-melting alloy.