CN102380705A

CN102380705A - Flameless double-opening stereoscopic cross exothermic welding method and mould thereof

Info

Publication number: CN102380705A
Application number: CN2011102496915A
Authority: CN
Inventors: 秦志春
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-18
Filing date: 2011-08-18
Publication date: 2012-03-21

Abstract

The invention discloses a flameless double-opening stereoscopic cross exothermic welding method and a mould thereof, which are characterized by the way of one-step cross exothermic welding for pure copper, copper-clad steel strands or a single round wire in a flameless state without disconnecting a main wire and branch wires respectively through the mould. A reaction cavity of the mould is in the shape of an overhung calabash, so that gas generated in reaction of flux is buffered and distributed at a plurality of positions when rising. A body of the mould is of a double-opening type and is operated by two pairs of mould clamps. An upper mould is opened or closed horizontally while a lower mould is opened or closed vertically as required, so that the main wire and the branch wires are placed into the mould without being disconnected respectively. A forming cavity of the mould is in the partially enlarged shape of the round wire, the diameter of the forming cavity is 1.20-1.25 times of that of the main wire or each branch wire, the length of the forming cavity is three times of that of the main wire, and the size of the connection position of the main wire with each branch wire is equal to the diameter of the branch wire.

Description

Two body cross type heat release welding method and the moulds thereof opened of a kind of nonflame

Technical field

The present invention relates to a kind of heat release welding method and mould thereof.Particularly a kind of nonflame is two opens body cross type heat release welding method and mould thereof, belongs to mould manufacturing field.

Background technology

Increasing along with Chinese government's energy-saving and emission-reduction dynamics; Large quantities of is that the power station construction of unit is being carried out with 1000MW supercritical generating unit; The Application and Development of nuclear energy power generation, coastal and marine wind energy, large span, high pressure, UHV transmission gauze are setting up synchronously at a distance.These key projects have a something in common, are exactly the quality of Construction of earth electrode network quality, and are most important to the safe operation of power system.High conductivity, corrosion resistant fine copper twisted wire and continuous up-casting copper-clad steel twisted wire of new generation and single round line grounded screen replace hot-galvanized steel grounded screen basically, and the life-span can reach 50 years.The heat release welding is the welding manner that this grounded screen is fit to.Through adjustment, can adapt to the welding of fine copper and copper-clad steel twisted wire to flux composition.Cross type is connected in all shape pads of grounded screen and accounts for more than 70%.

Existing heat release solder technology in cross type welding, is cut off main line or branch line, perhaps main line and branch line is cut off respectively, is cross then and lies in and carry out heat release in the mould and weld.Such cut-out not only need spend lot of manpower and material resources, deals with improperly also and can produce burr or broken lot, increases the difficulty that the twisted wire head gets into mould, but also has directly reduced the reliability at plumb joint position self.In addition, mold gases outlet position is stayed between loam cake and the die lip, reacted roaring flame direct projection ejection, but also have the part metals reactant, easily peripheral facilities and personnel are damaged.

Summary of the invention

The technical problem that the present invention will solve provides and a kind ofly more saves, method more efficiently; Produce the heat release welding point that needs a large amount of special models of using in a kind of key state project grounded screen construction in this way; And after using it, the reliability of whole grounded screen promotes significantly.Be applicable to the large-scale grounding network of other industry simultaneously.

Another technical problem that the present invention need solve; Be that it is reasonable to design a nested structure, easy to operate according to the needs of producing this product; The mould of long service life; This mould not only can guarantee that the product of producing has fine qualities, simultaneously its cleverly structure guaranteed that also Mould operation is also very convenient, help enhancing productivity.

In order to address the above problem, the invention provides following technical scheme:

Nonflame of the present invention is two opens body cross type exothermic welding mould, is made up of three parts: first is by 13 patrixes 2 formed for one on reaction chamber 9, main line groove 6 forming cavities; Second portion is by 14 counterdies 1 formed for one under wire casing 4 forming cavities; Third part is made up of upper cover plate 3 and flame arrest parts thereof.

Reaction chamber, forming cavity parts are critical piece.Reaction chamber provides solder flux to be reacted into molten metal liquid at this, and main line groove, wire casing, forming cavity are included respectively with main line and branch line, and molten metal liquid flows into forming cavity, accomplishes the required shape of heat release Welding Design.

Upper cover plate flame arrest parts are that the air-flow that in course of reaction, forms is obtained the many places buffering in uphill process.The air-flow that major part has a large amount of metal reactants collides through main pore 16 and upper cover plate 3 walls in uphill process, and reaction chamber rebounds; Another part has the air-flow of little metal reactant, hangs the cucurbit bottom margin reaction chamber that rebounds by the feet through reaction chamber; Also have sub-fraction to have the air-flow of trace meter reactant, get into the arc air flue that upper cover plate has the flame arrest grid through the secondary pore 5 of reaction chamber inside top, the gas after the decay is discharged mould by

venthole

7,8 both directions at last.

Description of drawings

Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further explain:

Fig. 1 is an outline drawing of the present invention

Fig. 2 is the state diagram of die cover of the present invention when opening

Fig. 3 is the A-A cutaway view of Fig. 2

Fig. 4 is that the B of die cover 3 among Fig. 2 is to view

(promptly along B to the inner chamber of seeing die cover)

Fig. 5 is the C-C cutaway view of die cover 3 among Fig. 1

(this C-C cutaway view only carries out vertical profile to die cover)

Fig. 6 is that the D of die cover among Fig. 2 is to view

(promptly along D to the side of seeing die cover)

The specific embodiment

Among the figure: 1, counterdie, 2, patrix, 3, upper cover plate, 4, a wire casing; 5, secondary pore, 6, the main line groove, 7, upper cover plate flank pore, 8, pore above the upper cover plate; 9, reaction chamber, 10, band flame arrest grid arc air flue, 11, patrix v leg of fixture jack, 12, lower mould clamping device pin jack; 13, on the forming cavity, 14, under the forming cavity, 15, the groove that ignites, 16, main pore

The present invention is two body cross type heat release welding method and the moulds thereof opened of a kind of nonflame, and to shown in Figure 6, mould is by the exotic material die cast like Fig. 1, and its fineness is good, and intensity is high, and the life-span is long, and normal condition can be used more than 100 times repeatedly.The reaction chamber 9 of mould 2 has big as far as possible space in order that offer solder flux for hanging Pear-Shaped by the feet when reaction, its its specific structure form forms the many places buffer strip in reaction chamber, and solder flux is reacted into molten metal liquid at this; Main line, branch line if any stained, carry out clean before getting into mould; When mould uses first, toast a little, fold moisture with blowtorch; Rainy weather can not weld.On main line groove 6 forming cavities 13 with wire casing 4 and forming cavity under 14 main line, branch line are the stereo cross type intersect and include mould in; The mould pinch inserts die clamper hole 11 and lower mould clamping device pin hole 12 respectively; Regulate and the anchor clamps screw of screwing, can carry out the operation of closure or opening mold.Flux is reacted into molten metal liquid after reaction chamber ignites with burning torch through groove 15 places of igniting, flow into forming cavity, through about 40 times in second, opens mould, accomplishes the heat release welding.Meanwhile, by the gas that reaction produces, the air-flow that major part has a large amount of metal reactants collides through main pore 16 and upper cover plate 3 walls in uphill process, and reaction chamber rebounds; Another part has the air-flow of little metal reactant; Hang the cucurbit bottom margin reaction chamber that rebounds by the feet through reaction chamber; Also have sub-fraction to have the air-flow of trace meter reactant; Get into the arc air flue that upper cover plate has the flame arrest grid through the secondary pore 5 of reaction chamber inside top, the gas after the decay is discharged mould by

venthole

7,8 both directions at last, avoids peripheral facilities and personnel are damaged.

In order to make the welded header potential energy bear the heavy current impact that strong thunderbolt or short circuit cause; Be unlikely heating or damage; Guarantee the safe operation of grounded screen, the plumb joint diameter is respectively main line, branch line 1.20～1.25 times, serve as theme 3 times of diameter of length; Main line and branch line connecting portion and branch line equal diameters, 30 ° of plumb joint two chamfers.

According to the collocation of main line, branch line different size, select the mould that is complementary with it for use.

Claims

1. two body cross type exothermic welding moulds of opening of a nonflame.It is characterized in that: mould reaction chamber 9 is for hanging Pear-Shaped by the feet; Mould upper cover plate passage communicates with the inboard secondary pore 5 of reaction chamber; Two semicircular arc buffer part about upper cover plate air flue 10 is provided with, venthole 7,8 is separately positioned on the top and the flank of upper cover plate 3, and forming cavity is the stereo cross chiasma type.

2. according to right 1, upper cover plate air flue 10 is a semicircular arc, and several semiclosed flame arrest grid are set in the air flue.

3. according to right 1,13 is one on reaction chamber 9 and main line groove 6 and the forming cavity, and promptly patrix 2, and patrix is carried out the left and right directions closure or openness; 14 be one under wire casing 4 and the forming cavity, and promptly counterdie 1, and counterdie is carried out closure or openness up and down, overlaps same mould holder difference implementation and operation with two.

4. the mould molding chamber is the local shape of amplifying of circle line, and for the ease of opening mould, two ends are 30 ° of angles.For guaranteeing that the welded header potential energy bears heavy current impact and is unlikely heating or damages, its diameter is respectively main line or branch line 1.20～1.25 times, serve as theme 3 times of diameter of length, the size of two line connecting portions and branch line equal diameters.