CN206571486U - A kind of gas expansion device - Google Patents

Abstract

A kind of gas expansion device of the utility model, including expansion tube and inflation igniter head, expansion tube one end reducing sealed, other end necking is provided with inflation igniter head；Diameter reducing working method is to first pass through fixture to fix expansion tube, pass through fixture rotary expansion pipe and heating expansion tube end again, by expansion tube end heat to after close to or up plastic deformation, necking die front contact to expansion tube end after, expansion tube end is rearwardly moved from necking die front portion, necking die carries out compression and thickening shaping to expansion tube end, and necking end is thickened axially outward, then carries out through hole constant aperture to expansion tube end with through hole knife.Pressure vessel is made by diameter reducing working method in expansion tube.With simple in construction, structural component is easily worked, and manufacturing cost is low, does not fly head, and air tight, transportation safety, no miso-fire hidden danger, expansive force is big.

Description

A kind of gas expansion device

Technical field

The utility model belongs to expansion gear technical field, more particularly to a kind of gas expansion device.

Background technology

Existing gas expansion device（Fracturing device）Hereinafter referred to as expansion gear is such as：CN201611099345.2、 CN201520283079.3, CN201510489513.8, CN201510556527.7 connecting portion generally use engagement thread（Screw thread Need machining）Or welding manner or butt welding mode are attached, no matter are manufactured, inflated using which kind of above-mentioned mode Head, let out can head can have weak spot with expansion pipe jointing part, cause expansion gear first fracturing of connecting portion in expansion, fly The situation of head.

Existing expansion gear（Fracturing device）Also have that building block is more, each component processing and the complicated technology of packaging technology Problem.

Such as the patent document that notification number is CN205858345U, disclose and " plug, expansion tube, activator, topping up hole and close Activator installing port is provided with locking-valve, plug, topping up hole is provided with plug or expansion tube ", though saved than other expansion gears Many parts and number of assembling steps, however it remains expansion tube two needs to process twice, that is, one needs welding when assembling, another Head needs thread seal to connect, or two is connected using welding manner, is welded and is required high to the technological level for welding master worker, The whole lap welding of connecting portion one picks out thickness always with seamless situation less than 20%, and connecting portion, will with the presence of any one weak spot It can not use, threaded connection then needs to carry out screw thread process at expansion tube two, by the expansion tube both ends ratio of screw thread process The pipe shaft weakness not being processed so that plug has a whole circle weak spot with expansion pipe jointing part, is answered because connecting portion is present Power weak spot, and use plug（Fill head）During threaded connection, plug（Fill head or let out energy head）Diameter is slightly less than expansion phial Body diameter, causes plug stress surface greatly, volume is big, weight weight, and the expansion gear first fracturing of connecting portion and appearance in expansion fly head Situation.Topping up hole machined needs processing radial hole and axial hole, and radial direction bore ends need to process coning, and axial hole need to add Work into four sections of different-diameter sizes shoulder hole, while radial hole and axial hole need to link together, it is necessary to Precision Machining, plus Work required precision is high, and processed complex is unfavorable for industrialized production；Plug needs individually processing activated device permanent opening, locking-valve With fairlead, it is necessary to repeatedly be processed using different lathes, all parts of expansion gear need machining to cause whole product to give birth to Production takes time and effort；Pipe outer wall is expanded simultaneously is provided with detonating fuse, and expansion tube two ends are provided with internal thread, it is necessary to using thicker steel pipe system Make, manufacturing cost increase.

Because expansion gear has the possibility for flying head in expansion process in the prior art, therefore existing expansion gear is placed on Only fly device, it is necessary to be placed in inflation port in the inflation port being drilled or fill filler deep enough, due to only flying device during expansion Or the effect of filler, solve to fly head phenomenon（Pneumatic head or let out can head fly out inflation port）, realize safe working.It is description as follows Only fly the document of device, CN201510487194.7, CN201620646686.6.

However using only fly device also not 100% effectively, fly head situation still can occur, expansion-head once flies out, Danger is brought to workmen and surrounding biologic；The increase of use cost can be also caused using only winged device, it will usually increase simultaneously The use cost of dozens of yuan.

Gas cylinder, which is generally used, screws blocking valve lock gas and inflation, and fracturing device filling process will wash pipe（Need Multiple working procedure）, it is necessary to the artificial screw rod that screws carries out lock gas, it is that check valve disclosed in CN205858345U enters even with notification number Row is filled with liquid carbon dioxide, and due to needing the filling pressure to 10-150MPa, sealing ring is often washed out or rushed when filling It is broken；Using, because technique and smoothness requirements are high, causing processing cost high at ball seal spool, production defect rate is caused to be up to More than 80%.Gases at high pressure fill sealing be always air seal field technical bottleneck, especially can low cost solve fill it is close Envelope.

Gas fracturing device of the prior art is regardless of whether using activator, being required in lead access expansion tube, needing High pressure sealing processing is carried out to lead, directly result in and fill a volume greatly, the deficiency of weight weight.

Existing throat processing method is to carry out necking with roller, it is not easy to realize uniform thickened, such as swollen for producing in batches Tube expansion can produce very high defect rate.

The content of the invention

The purpose of this utility model, which is to provide, a kind of has that simple in construction, manufacturing cost is low, expansion pipe jointing part is without weakness Point, inflation igniter head are air tight, do not fly head and/or gas expansion device and the diameter reducing working method of expansion tube without miso-fire and should With.

For achieving the above object, the technical scheme that the utility model is used is：A kind of gas expansion device, including Expansion tube and inflation igniter head, it is characterised in that：Described expansion tube one end reducing sealed, other end necking is lighted a fire provided with inflation Head, energy-storing chamber is constituted between reducing sealed end and inflation igniter head；It is described inflation igniter head include inflation pedestal, through hole, valve pocket, Igniting chamber, charging connector, conductive valve, insulating barrier, heating wire, baffle ring and the first sealing ring, inflation pedestal upper end interposition are installed Have and through hole is provided with below charging connector, charging connector, through hole lower section is provided with valve pocket, and valve pocket lower section is provided with igniting chamber, and interior be provided with of valve pocket is led Electric valve and the first sealing ring, igniting intracavitary are provided with baffle ring；One end of conductive valve is the conductive thimble of inflation, and the other end is conductive valve Core；The conductive thimble of inflation is provided with insulating barrier, and the first sealing ring is enclosed on the conductive thimble of inflation, and air-filled pore is from the conductive thimble of inflation Top extend through bottom and connected with valve pocket；Conductive valve element connection heating wire one end, heating wire other end connection inflation pedestal or Baffle ring, inflation pedestal is electrically connected with baffle ring during connection baffle ring；The expansion tube includes bottleneck, bottleneck, body and reducing sealed End, bottleneck inwall is provided with the first internal thread, and the thickness of bottleneck is more than the thickness of body, and the thickness at reducing sealed end is more than body Thickness, bottleneck is more than or equal to the thickness of 2.5 times of bodies with inflation igniter head connecting portion length；The diameter of the conductive valve element is big In the diameter of equal to the 1.15 times conductive thimbles of inflation；The bottleneck of the expansion tube and reducing sealed end are processed by necking.

It is preferred that, one end of the conductive valve is the conductive thimble of inflation, and the other end is conductive pin, when middle part is conductive valve element, Conductive pin connection heating wire one end, heating wire other end connection inflation pedestal or baffle ring.

It is preferred that, the bottleneck is provided with seal groove, and seal groove is provided with the second sealing ring.

It is preferred that, the igniting cavity wall is provided with internal thread, and baffle ring outer wall is provided with the external screw thread matched with internal thread.It is excellent Choosing, the strength of materials of the conductive valve is more than or equal to the gas storage pressure of energy-storing chamber.It is preferred that, the conductive valve uses stainless steel Matter.It is preferred that, the thickness of the bottleneck is more than or equal to the thickness of 1.5 times of bodies.It is preferred that, the thickness at the reducing sealed end is more than etc. In the thickness of 1.5 times of bodies.

A kind of gas expansion device, it is characterized in that：Necking cascade port is provided with the reducing sealed end, in necking cascade Level syncranium is set to constitute tandem type expansion gear on mouth.

It is preferred that, the level syncranium includes the 3rd sealing ring, cascade screw, positive terminal, anode connector, positive wire and the One insulating barrier, the 3rd sealing ring is arranged on below necking cascade port bottom, the 3rd sealing ring provided with cascade screw, is cascaded in screw Center portion is provided with positive terminal and anode connector, and the first insulating barrier, anode connector and level are provided between positive terminal and anode connector Join screw electrical connection, positive terminal connection positive wire one end, positive wire other end connection conductive pin.

A kind of diameter reducing working method of expansion tube, it is characterized in that：First pass through fixture and fix expansion tube, then revolved by fixture Turn expansion tube and heating expansion tube end, by expansion tube end heat to after close to or up plastic deformation, necking die is anterior Touch after expansion tube end, expansion tube end is rearwardly moved from necking die front portion, necking die enters to expansion tube end Row compression and thickening is molded, and then carries out through hole constant aperture to expansion tube end with through hole knife；Repeat the above steps to expansion tube The other end carries out compression and thickening shaping, and through hole constant aperture, or progress sealing thicken shaping.

It is preferred that, the necking die is provided with lubricant.It is preferred that, the lubricant is carbon dust, talcum powder, coal dust or graphite At least one of powder, or at least one of carbon dust, talcum powder, coal dust, graphite powder and grease mixing.Carbon dust, talcum powder, coal The effect of powder, and/or graphite powder and high-temperature grease is lubrication and prevents expansion tube to be adhered with necking die, or expansion tube and lubrication Agent produces chemical reaction, reduces coefficient of friction, increases die life.Necking die and expansion tube stiction are bigger, Power consumption is bigger, and die life is shorter, therefore graphite powder or high-temperature grease are coated with necking die can increase reducing die Have service life, reduce power consumption.

The pressure vessel that a kind of diameter reducing working method of the above-mentioned expansion tube of application is made, it is characterised in that：By the expansion Pressure vessel is made by diameter reducing working method in pipe.It is preferred that, the pressure vessel is steel cylinder.

The purpose of rotation is expansion tube end is uniformly extruded the effect for reaching uniform thickened and realizing forging.Expand pipe end Portion is heated to being easy for necking die to expansion tube end progress necking processing close to or up plastic deformation.Necking die is root A kind of necking processing mold designed according to the shape that expansion tube end needs are processed into.

It is preferred that, the manufacture method of the expansion tube also includes continuing rotary expansion pipe after through hole, and screw tap is towards expansion tube end Tapping is moved in through hole direction, and screw tap does not rotate, and screw tap follows expansion tube rotary speed automatic telescopic to adjust, after the completion of tapping, instead To rotary expansion pipe, screw tap dorsad expands the motion of tube end through hole direction and exits screw tap.

It is preferred that, the manufacture method also includes continuing rotary expansion pipe after through hole, and screw tap is towards expansion tube end through hole direction Tapping is moved, screw tap does not rotate, the tooth on screw tap is less than 1/2nd, after the completion of tapping, and screw tap is thick to anodontia direction advance tooth Spacing, screw tap dorsad expands the motion of tube end through hole and exits screw tap.

Screw tap is to reduce screw tap integral diameter for the purpose of more than half anodontia, and screw tap is between anodontia direction advance tooth thickness Away from, make screw tap separate screw thread backed off after random screw tap.

It is preferred that, the manufacture method is heated by sensing heater or burning torch or welding gun to expansion tube end.Using When 40Cr steel pipes carry out necking processing, steel tube end part is heated to 600-980 DEG C of temperature.

It is preferred that, the necking die be on matrix be provided with transverse part, arc sections, supporting part and longitudinal direction portion, transverse part and Arc sections are provided between longitudinal portion, is transverse part between supporting part and arc sections, adjusts the r angles of arc sections and the R angles of transverse part Can be to expansion tube end necking machine-shaping, the length of necking die is more than or equal to the diameter of 2.5 times of expansion tube ends, transverse part Width L be expansion tube end diameter more than 1/3rd.

It is preferred that, the r angles of the arc sections rearwardly diminish from necking die front portion, and necking is processed into necking end axially inwards Thicken.

It is further preferred that the r angles of the arc sections are from the anterior rearwardly ladder of necking die or linearly diminish, contracting is processed into necking Mouthful end uniform thickened axially inwards.

It is preferred that, the r angles of the arc sections are constant, and necking is processed into necking end and thickened axially outward.

The R angles for expanding the bigger transverse part of pipe diameter are bigger, and width L is longer.Or the R angles of the expansion bigger transverse part of pipe diameter are not Become, the length of necking die is longer.

It is preferred that, the necking die is made of tool steel.It is further preferred that the tool steel is tungsten steel or stainless steel or roll Steel.

The r angles influence of arc sections expands the outer wall shape of tube end and thickened, the R angles of transverse part and width L influence expansions The amount of swelling of tube end；The r angles of arc sections rearwardly become the amount of swelling that a small amount of influences expand phial ends from necking die is anterior. L length is longer, expansion tube end upsetting more after.

Linear velocity described in the utility model refers to that the expansion bigger rotating speed of pipe diameter is slower.

The linear velocity of expansion tube is adjusted according to the diameter, thickness and point end heating temperatures of expansion tube.

Oxidizing and Reducing Agents is filled in expansion gear described in the utility model, energy-storing chamber and constitutes expander.

It is preferred that, the Oxidizing and Reducing Agents is carbon dioxide and magnesium or aluminium or titanium or potassium any one mixing.

It is further preferred that the overcritical oxygen of oxidant and reducing agent wood chip, paper scrap, staple waste paper, straw, carbon black, grass, carbon dust Or the mixing of at least one of saw wood ash.

Above-mentioned reducing agent has extremely strong adsorptivity to overcritical oxygen, with overcritical oxygen reaction after, reactant be carbon dioxide, Steam and a small amount of oxygen, the effect polluted with nonhazardous gas, while above-mentioned reducing agent is easily obtained, cost is extremely low.

The reducing agent is fibrous material.Fibrous material includes wood chip, paper scrap, staple.Using such reducing agent, combustion After burning, reactant is carbon dioxide and steam, the effect polluted with nonhazardous gas.It is preferred that, the reducing agent is reproducibility Simple substance.Reproducibility simple substance includes carbon dust, aluminium powder, magnesium powder, iron powder or silica flour.It is preferred that, the reducing agent is animal wool matter.This kind of material Material has stronger adsorptivity.It is preferred that, the reducing agent is glucide.The glucide includes glucose, sucrose or shallow lake Powder.It is preferred that, the reducing agent is alcohols material.The alcohols material includes ethanol, propyl alcohol or butanol.It is preferred that, the reducing agent For hydrocarbons.The hydrocarbons include methane, ethane, propane, ethene, propylene, acetylene or propine.It is preferred that, the energy storage Intracavitary is also filled with catalyst, the catalyst be ferroso-ferric oxide, di-iron trioxide, manganese dioxide, chromium oxide, cupric oxide, Zinc oxide, nickel oxide, manganese sulfate, at least one of chromium sulfate or activated carbon.It is preferred that, heating is also filled with the energy-storing chamber Agent, the heating agent mixes for one or both of aluminium powder or magnesium powder.It is preferred that, the reducing agent is powdered, graininess, bar It is thread or be pressed into bulk.

The production of expansion gear described in the utility model and using process it is：Inflation igniter head is first passed through into pipelining Mode is assembled, and is then sealed by inflation igniter head precession bottleneck rigid seal or by sealing ring, reduction is filled in energy-storing chamber Agent（Such as carbon dust or carbon black）；Conductive valve, oxidant are opened by charge gun top at exploitation scene（Such as overcritical oxygen）Pass through air-filled pore It is filled into energy-storing chamber, the oxidant in energy-storing chamber（Such as overcritical oxygen）Uniform adsorption is in reducing agent（Such as carbon dust or carbon black）On, Heating wire is oxidized agent in filling process（Such as overcritical oxygen）And reducing agent（Such as carbon dust or carbon black）Uniform attached collection, inflates conducting top Pin connects positive source, and inflation pedestal or expansion pipe outer wall connect power cathode, and being powered to heating wire makes the reaction material wink in energy-storing chamber Between expansion break through expansion tube acting.

The acting principle of prior art expansion gear is that liquid carbon dioxide absorbs igniter（Activator）Discharge Heat, makes liquid carbon dioxide become the constraint fracturing acting that high pressure expanding gas break through expansion tube.

The acting principle of the utility model expansion gear is：Oxidant chemically reacts with reducing agent, produces high pressure swollen Flatulence body breaks through the constraint fracturing acting of expansion tube.

The reducing agent that the utility model is used is powdered, graininess or the thread solid-state of bar, or the liquid such as ethanol, glucose , there is huge surface area and suction-operated, by being filled with 10-150MPa hyperbaric oxygen agents in state（Overcritical oxygen）, oxidant （Overcritical oxygen）Uniform adsorption is in reducing agent（Carbon dust or carbon black）On, the oxidant after absorption（Overcritical oxygen）With reducing agent（Carbon Powder or carbon black）Generation chemical reaction produces high pressure expanding gas.It is swollen that high pressure is produced compared with the heat absorption of liquid carbon dioxide in the prior art Flatulence body, the high pressure expanding gas produced that chemically react are bigger at least one times than inhaling thermogenetic high pressure expanding gas expansive force.

The utility model expansion tube two ends are processed by necking, the thickness of expansion tube bottleneck is more than or equal to 1.5 times of bodies Thickness, the expansion tube bottleneck processed through necking thickens, bottleneck to body arc transition, and it is higher that bottleneck is more pressure-resistant than body, solves The weak spot of inflation igniter head and expansion pipe jointing part, meanwhile, inflation igniter head diameter is less than or equal to 1/2nd expansion tubes Body diameter；It is preferred that inflation igniter head diameter is 1/3rd of expansion tube body diameter, reduced compared with expansion tube body diameter 2/3rds, therefore the utility model inflates igniter head diameter and can accomplish the diameter of very little, realizes that inflation igniter head has very little Stress surface, small volume is lightweight, and bottleneck connecting portion length is more than 2.5 times of body thickness, therefore bottleneck connecting portion and inflation Igniter head than body high pressure, efficiently solves the technical problem of winged head.

There are the conductive thimble of inflation, conductive valve element and conductive pin on the utility model conductive valve, by being set on conductive valve Air-filled pore, the cooperation of the conductive thimble of inflation, air-filled pore and sealing ring, realizes the function of inflation, sealing and conduction, realizes inflation With the purpose of igniting, conductive valve is sintered using die casting or metal powder injection molded technology, simplifies inflation and igniting two Kind of complicated frame mode, therefore the utility model has simple in construction, directly reduces production cost.Overcritical oxygen is used simultaneously It is lower than the mixture cost using potassium hyperchlorate, potassium permanganate and aluminium powder with carbon dust or carbon black.

As not having air-filled pore on conductive valve, when filling oxidant, oxidant is at through hole gap and conductive valve and valve pocket Between gap at be filled into energy-storing chamber, impacting with high pressure conductive valve and sealing ring after the completion of filling in energy-storing chamber, gases at high pressure Gap between conductive valve and valve pocket is caused sealing ring by impact breakage or deformation, caused close by rear impact sealing ring Seal can not be effectively close with conductive valve；The application on conductive valve by setting air-filled pore, the height after the completion of filling in energy-storing chamber The gap between conductive valve and valve pocket is pressed to impact inflation hole site, the pressure for making sealing ring by the pressure release of air-filled pore subtracts It is small, therefore sealing ring by blastic deformation or will not break through；Because the sectional area of conductive valve element is big, the high pressure in energy-storing chamber concentrates on conduction On valve element, the pressure release effect of air-filled pore is added, the moment sealing ring for unclamping charge gun is pushed down by conductive valve element, realizes sealed mesh , therefore air-filled pore in process oxidant is filled except playing a part of filling hole, is also acted as when terminating and filling to sealing ring The effect of pressure release.

The composition of the utility model expansion gear is mainly expansion tube and inflation igniter head, what inflation and igniting united two into one Shared mode simplifies inflation and ignition structure；Igniting is swollen without lead is accessed by conductive valve and inflation pedestal access power supply In tube expansion, therefore the structure that high pressure sealing processing is carried out to lead is eliminated, therefore inflation igniter head can be made very small, and be overcome existing Big and weight weight the deficiency of technology volume.

Expansion gear is in transportation, energy-storing chamber interior only reducing agent, anaerobic agent, therefore produced in transportation Electrostatic or high temperature will not trigger expansion gear to burn or fracturing.Filling the electrostatic produced after oxidant in handling process can be electric Heated filament, conductive valve and expansion tube are sponged, it is to avoid occurred from fracturing situation.

The igniter of prior art（Activator）Mainly mixed using solid oxidizer and solid state reduction agent（It is typically high The strong reductant such as the strong oxidizers such as potassium chlorate and aluminium powder）The reaction material bag packed afterwards, heating wire is wrapped in mixture, fortune During defeated easily occur reaction material stripped off with heating wire separate generation gap the problem of etc. cause generation miso-fire；The utility model Described expansion gear, its heating wire is oxidized agent（Such as overcritical oxygen）And reducing agent（Such as carbon dust or carbon black）Uniform attached collection, fortune Defeated and handling process is stripped off with heating wire in the absence of reaction material and separates the problem of there is gap, and when being powered igniting, heating wire is produced Moment detonates after high temperature hyperpyrexia reacts with overcritical oxygen, realizes 100% effective detonation, effectively prevent the generation of miso-fire The danger of reason and row's miso-fire.

Expansion gear described in the utility model, its reaction material carbon powder of reducing agent and the overcritical oxygen reaction of oxidant are violent, Oxidation reaction is realized, its reaction product is mainly nontoxic carbon dioxide and a small amount of oxygen, to expansion scene without dirt Dye, the poisoning hidden danger of field personnel can be prevented effectively from, because there is a small amount of oxygen not reacted after expansion, thus can upon inflation compared with Recover construction operation in short time, suitable tunnel is used.It can not recover construction in a short time after existing expansion gear expansion Operation.

Expander described in the utility model combines traditional gas expansion technology and liquid oxygen fracturing technology, compared to biography The expander of system, largely improves expansion power, compared to traditional liquid oxygen fracturing, and solving liquid oxygen fracturing can not be Stored under normal temperature, the use environment limitation of necessary cryogenic freezing after the high risk existed under normal temperature and inflation.

The utility model has simple in construction, and structural component is easily worked, and manufacturing cost is low, does not fly head, air tight, Transportation safety, no miso-fire hidden danger, expansive force is big.

Brief description of the drawings

Fig. 1 is the sectional view of the utility model embodiment 1；Fig. 2 is the sectional view of the utility model embodiment 2；Fig. 3 For the sectional view of the utility model expansion tube；Fig. 4 is the sectional view that the utility model inflates igniting header structure 1；Fig. 5 is this reality With the sectional view of aerated pedestal；Fig. 6 is the sectional view of the utility model conductive valve；Fig. 7 is the utility model cascade structure Sectional view；Fig. 8 is the sectional view that the utility model inflates igniting header structure 2；Fig. 9 is the solid of the utility model necking die Figure；In figure：1 is expansion tube, and 101 be bottleneck, and 102 be bottleneck, and 103 be body, and 104 be reducing sealed end, and 105 be seal groove, 106 be the first internal thread；2 be inflation igniter head, and 201 be inflation pedestal, and 202 be through hole, and 203 be valve pocket, and 204 be igniting chamber, 205 be internal thread, and 206 be external screw thread；3 be air-filled pore；4 be charging connector；5 be conductive valve, and 501 be the conductive thimble of inflation, and 502 are Conductive valve element, 503 be conductive pin；6 be insulating barrier, and 7 be positive wire, and 8 be heating wire, and 9 be negative wire, and 10 be baffle ring, 11 It is the second sealing ring for the first sealing ring, 12,13 be energy-storing chamber, and 14 be the 3rd sealing ring, and 15 be cascade screw, and 16 connect for positive pole Head, 17 be anode connector, and 18 be positive wire, and 19 be necking cascade port, and 20 be level syncranium, and 21 be the first insulating barrier；22 be horizontal stroke To portion, 23 be arc sections, and 24 be supporting part, and 25 be longitudinal direction portion, and 26 be matrix；R is arc sections R angles, and R is transverse part R angles；L is Transverse part length；Arrow represents the direction of motion of necking die.

Embodiment

With reference to the utility model accompanying drawing 1-9, the technical solution of the utility model is clearly and completely described；Obviously, Described embodiment is only a part of embodiment of the utility model, rather than whole embodiments.Based on the utility model In embodiment, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made Example, belongs to the scope of the utility model protection.

Embodiment 1

A kind of expansion gear, including expansion tube 1 and inflation igniter head 2, one end reducing sealed of expansion tube 1, the other end Necking constitutes energy-storing chamber 13 provided with inflation igniter head 2 between reducing sealed end 104 and inflation igniter head 2；Described inflation igniter head 2 include inflation pedestal 201, through hole 202, valve pocket 203, igniting chamber 204, charging connector 4, conductive valve 5, insulating barrier 6, heating wire 8, gear The sealing ring 11 of ring 10 and first, inflation pedestal 201 upper end centre position is provided with charging connector 4, and the lower section of charging connector 4 is provided with through hole 202, the lower section of through hole 202 is provided with valve pocket 203, and the lower section of valve pocket 203 is provided with igniting chamber 204, provided with conductive valve 5 and the in valve pocket 203 Baffle ring 10 is provided with one sealing ring 11, igniting chamber 204；One end of conductive valve 5 is the conductive thimble 501 of inflation, and the other end is conduction Valve element 502；The conductive thimble 501 of inflation is provided with insulating barrier 6, and the first sealing ring 11 is enclosed on the conductive thimble 501 of inflation, air-filled pore 3 extend through bottom from the top of the conductive thimble 501 of inflation connects with valve pocket 203；The conductive connection heating wire 8 of valve element 502 one end, electricity The other end of heated filament 8 connection inflation pedestal 201 or baffle ring 10, inflation pedestal 201 is electrically connected with baffle ring 10 during connection baffle ring 10；Institute Stating expansion tube 1 includes bottleneck 101, bottleneck 102, body 103 and reducing sealed end 104, and the inwall of bottleneck 102 is provided with spiral shell in first Line 106, the thickness of bottleneck 102 is 6mm, and the thickness at reducing sealed end 104 is 6mm, and the thickness of body 103 is 3mm, bottleneck 102 It is 8mm with the inflation connecting portion length of igniter head 2；The diameter of the conductive valve element 502 is 5mm, the diameter of the conductive thimble 501 of inflation It is 2.5mm；The scope of activities of conductive valve 5 is limited by baffle ring 10；The bottleneck 102 of the expansion tube 1 and reducing sealed end 104 are logical Cross necking processing to thicken and form, the long 1200mm of expansion tube 1 40Cr or No. 35 steel；First sealing ring 11 uses O-ring；It is described to lead Electric valve 5 uses stainless steel.

When the body diameter of expansion tube is less than 300mm, the gas flow of energy-storing chamber interior energy storage is small, and pressure is small, conductive valve element 502 diameter is 1.15 times of the conductive diameter of thimble 501 of inflation, and the diameter of such as conductive valve element 502 is 2.3mm, inflates conducting top The diameter 2mm of pin 501.

When the strength of materials of conductive valve 5 is equal to the gas storage pressure of energy-storing chamber 13, conductive valve 5 is tapered, realizes rigid seal； The strength of materials of conductive valve 5 be more than energy-storing chamber 13 gas storage pressure when, it is necessary to be sealed by sealing ring.Conductive valve 5 is using stainless The casting of steel matter is formed, and then the conductive thimble 501 of inflation is drilled.

Embodiment 2

Expansion gear, is connected for convenience of heating wire 8 as described in Example 1, and described one end of conductive valve 5 is the conductive thimble of inflation 501, the other end is conductive pin 503, when middle part is conductive valve element 502, and the connection heating wire 8 of conductive pin 503 one end, heating wire 8 is another One end connection inflation pedestal 201；Expansion tube uses non-ferrous metal material or metal alloy or ABS or steel or copper alloy or aluminium alloy It is made；The strength of materials for manufacturing conductive valve 5 is directly proportional with energy storage pressure in 13 bottles of energy-storing chamber；The strength of materials of conductive valve 5 is slightly larger than Energy storage pressure in 13 bottles of energy-storing chamber.

Embodiment 3

The expansion gear as described in embodiment 1 or 2, the bottleneck 101 is provided with seal groove 105, and seal groove 105 is provided with second Sealing ring 12；Igniting chamber 204 inwall is provided with internal thread 205, and the outer wall of baffle ring 10 is outer provided with what is matched with internal thread 205 Screw thread 206；The thickness of the bottleneck 102 is 20mm, and the thickness at reducing sealed end 104 is 20mm, and the thickness of body 103 is 2mm； The bottleneck 102 of the expansion tube 1 and reducing sealed end 104 are thickened by necking processing to be formed；Second sealing ring 12 is using O-shaped Circle.

Embodiment 4

The expansion gear as described in embodiment 1 or 2 or 3, is provided with necking cascade port 19, level on the reducing sealed end 104 Syncranium 20 is arranged on composition tandem type expansion gear on necking cascade port 19；The level syncranium 20 includes the 3rd sealing ring 14, level Join screw 15, positive terminal 16, anode connector 17, the insulating barrier 21 of positive wire 18 and first, the 3rd sealing ring 14 is arranged on contracting Mouth cascade port 19 bottom, the lower section of the 3rd sealing ring 14 is provided with cascade screw 15, and cascade screw 15 central part is provided with positive terminal 16 With anode connector 17, the first insulating barrier 21, anode connector 17 and cascade screw are provided between positive terminal 16 and anode connector 17 15 electrical connections, the connection positive wire 18 of positive terminal 16 one end, the other end of positive wire 18 connection conductive pin 503.

Expansion tube is using the manufacture method of body wall thickness 3mm 40Cr steel pipes in above-described embodiment：A kind of expansion tube Diameter reducing working method, first passes through fixture and fixes expansion tube, then pass through 50-200 linear velocity rotary expansion pipes and heating expansion tube End, by expansion tube end heat to after close to or up plastic deformation, with 400-2000 linear velocity rotary expansion pipes, reducing die Has ends contact to expanding after tube end, expansion tube end is rearwardly moved from necking die end, and necking die is to expansion tube End carries out compression and thickening shaping, keeps expansion tube 400-2000 linear velocities constant, and then expansion tube end is entered with through hole knife Row through hole constant aperture；Repeat the above steps and compression and thickening shaping, through hole constant aperture are carried out to expansion tube the other end, or enter Row sealing thickens shaping.Whole process is completed in 10 seconds.

Above-described embodiment, the expansion tube is 35 chrome-molybdenum steel or 40 chromium steel.From the expansion tube 1 of 3mm thickness, i.e. body 103 thickness 3mm, the end upsetting of expansion tube 1 to more than 4.5mm, the i.e. thickness of bottleneck 102 thickens more than 4.5mm.Generally contracting The consistency of thickness of the thickness and bottleneck 102 of mouth sealed end 104, the i.e. thickness at reducing sealed end 104 thickens more than 4.5mm.

Optimal case is：From the thickness 3mm of body 103, the thickness at bottleneck 102 and reducing sealed end 104 thickens 6mm. The need for according to expansive force, when the expansion tube uses carbon steel, pipe thickness is 1mm to 10mm；The expansion tube uses chromium steel When, pipe thickness is 1mm to 10mm.

Claims (7)

1. a kind of gas expansion device, including expansion tube（1）With inflation igniter head（2）, it is characterised in that：The expansion tube（1） One end reducing sealed, other end necking is provided with inflation igniter head（2）, reducing sealed end is with inflating igniter head（2）Between constitute storage Can chamber（13）；Described inflation igniter head（2）Including inflation pedestal（201）, through hole（202）, valve pocket（203）, igniting chamber（204）、 Charging connector（4）, conductive valve（5）, insulating barrier（6）, heating wire（8）, baffle ring（10）With the first sealing ring（11）, inflate pedestal （201）Upper end centre position is provided with charging connector（4）, charging connector（4）Lower section is provided with through hole（202）, through hole（202）Lower section is provided with Valve pocket（203）, valve pocket（203）Lower section is provided with igniting chamber（204）, valve pocket（203）It is interior to be provided with conductive valve（5）With the first sealing ring （11）, chamber of lighting a fire（204）It is interior to be provided with baffle ring（10）；Conductive valve（5）One end be the conductive thimble of inflation（501）, the other end is to lead Electric valve element（502）；The conductive thimble of inflation（501）It is provided with insulating barrier（6）, the first sealing ring（11）It is enclosed on the conductive thimble of inflation （501）On, air-filled pore（3）From the conductive thimble of inflation（501）Top extend through bottom and valve pocket（203）Connection；Conductive valve element （502）Connect heating wire（8）One end, heating wire（8）Other end connection inflation pedestal（201）Or baffle ring（10）, connect baffle ring （10）When inflate pedestal（201）With baffle ring（10）Electrical connection；The expansion tube（1）Including bottleneck（101）, bottleneck（102）, bottle Body（103）With reducing sealed end（104）, bottleneck（102）Inwall is provided with the first internal thread（106）, bottleneck（102）Thickness it is big In body（103）Thickness, reducing sealed end（104）Thickness be more than body（103）Thickness, bottleneck（102）With inflation point Duration and degree of heating（2）Connecting portion length is more than or equal to 2.5 times of bodies（103）Thickness；The conductive valve element（502）Diameter be more than or equal to The conductive thimble of 1.15 times of inflations（501）Diameter；The expansion tube（1）Bottleneck（102）With reducing sealed end（104）Pass through contracting Mouth is processed.

2. gas expansion device as claimed in claim 1, it is characterised in that：The conductive valve（5）One end it is conductive for inflation Thimble（501）, the other end is conductive pin（503）, middle part is conductive valve element（502）When, conductive pin（503）Connect heating wire（8） One end, heating wire（8）Other end connection inflation pedestal（201）Or baffle ring（10）.

3. gas expansion device as claimed in claim 1 or 2, it is characterised in that：The bottleneck（101）Provided with seal groove （105）, seal groove（105）It is provided with the second sealing ring（12）.

4. gas expansion device as claimed in claim 1 or 2, it is characterised in that：The igniting chamber（204）Inwall is provided with interior Screw thread（205）, baffle ring（10）Outer wall is provided with and internal thread（205）The external screw thread of matching（206）.

5. gas expansion device as claimed in claim 1 or 2, it is characterised in that：The bottleneck（102）Thickness be more than or equal to 1.5 times of bodies（103）Thickness；The reducing sealed end（104）Thickness be more than or equal to 1.5 times of bodies（103）Thickness.

6. a kind of gas expansion device, it is characterized in that：At the gas expansion device reducing sealed end described in claim 1 or 2 （104）It is provided with necking cascade port（19）, in necking cascade port（19）Upper setting level syncranium（20）Constitute tandem type expansion gear.

7. gas expansion device as claimed in claim 6, it is characterised in that：The level syncranium（20）Including the 3rd sealing ring （14）, cascade screw（15）, positive terminal（16）, anode connector（17）, positive wire（18）With the first insulating barrier（21）, the 3rd Sealing ring（14）It is arranged on necking cascade port（19）Bottom, the 3rd sealing ring（14）Lower section is provided with cascade screw（15）, cascade spiral shell Silk（15）Central part is provided with positive terminal（16）And anode connector（17）, positive terminal（16）And anode connector（17）Between be provided with First insulating barrier（21）, anode connector（17）With cascade screw（15）Electrical connection, positive terminal（16）Connect positive wire （18）One end, positive wire（18）The other end connects conductive pin（503）.