In bursting work, available various electronic and non-electrical devices is amplified detonator signal and is transmitted, and comprises trigger, igniter, delay detonator, initiator or the like.In this article, the various devices that time break is amplified and transmits of term " trigger " general reference.
Trigger generally has a microscler tubular shell, end sealing, and other holds uncovered, and one or more pyrotechnic compounds or explosive agent are arranged, and is placed in the shell adjacent with blind end.
Therefore the output of trigger and the chemical composition of explosive are proportional, and be equally also proportional with its density and loading amount, will push explosive in the shell with the push strut of a minor diameter.For reaching desirable explosive density, may use up to 300 pounds (to be 600 pounds/inch on the push strut of 0.254 inch external diameter) or higher pressure.
If found to add the compression energy with a crust on the surface of gunpowder, many explosives all can trigger more responsive to collision or friction.Its sensitivity is the function of hardness, and promptly hardness increases and causes sensitivity to be increased.Owing to obtain the required high pressure of the desirable gunpowder density of trigger, normally realize that with push strut the typical case directly contacts with explosive with steel, makes the explosive sensitivity, the danger when having increased extruding explosive with gunpowder compression in the shell.
The hardness of push strut, the aligning of instrument during the compression explosive explosive is crushed to the combination of factors such as granule, and because the high pressure conditions of explosive unless the situation of formation has very thoughtful control, otherwise may cause the unexpected unfavorable initiation of trigger.
Compression during explosive trigger be not intended to cause another potential mechanism, for the explosive compacting time, the granule of explosive is moved in the annular space between push strut and the shell.Push in the housing in that push strut is moved, explosive material is compressed, when perhaps extracting out from shell, the explosive material of intercepting and capturing between shell and the push strut surface bears very a large amount of frictions, may cause disadvantageous ignition.
After explosive compressed in shell, usually trigger is transported between the manufacturer, or transport to and use on-the-spotly, trigger bears vibration during transportation, rocks and collides, tend to will compression explosive material loosen.The loose particles of explosive typically very easily causes because of friction and static, safety when therefore having influence in transit with the carrying that arrives behind the new place.
Therefore purpose of the present invention is to provide a kind of trigger and assemble method thereof of improvement, and this trigger makes it when trigger is assembled by using a fault vibration-damped component when the compression explosive material, has the ability of the inhibition unintended detonation of enhancing.
Other purposes of the present invention, a part see easily that obviously one one will be in hereafter.
Purpose of the present invention, advantage, characteristics, performance and relation about the narration of some embodiments of giving an example, reach illustrating of accompanying drawing vide infra, just can understand more, and the whole bag of tricks of the principle of the invention is used in the texts and pictures explanation.
The priming signal of making by the present invention amplifies conveyer, and a tubular shell that wherein forms axial slot is arranged, and housing has a blind end, and the end of opening wide on the other side; The explosive material that holds compression in the conduit is against blind end; A vibration-damped component is placed in the groove, and is adjacent with explosive material, and explosive is covered substantially, and vibration-damped component has the absorbing surface of a flexibility towards material, and contact with it keeps explosive material against blind end; A Flapper type signal transmission surface forms on vibration-damped component, and signal is transmitted to explosive material.
In another aspect of this invention, the madial wall of vibration-damped component and shell interference fit on diameter, the explosive that keeps compression is against blind end.
Disclose a kind of modification method of novelty in the present invention, comprise explosive material is packed in the axial slot of tubular shell; To there be the vibration-damped component of signal transfer surface to put into groove, cover the vibration-damped component in the cross section of groove, with madial wall tight fit on diameter of shell; With the blind end pushing of vibration-damped component to shell, thereby with explosive material compacting between vibration-damped component and housings close.
In other method of the present invention, before explosive material is put into conduit, housing is erect the placement blind end below opening wide end, thereby be bonded at the residue explosive material on the shell, when compressing, scrape by vibration-damped component, fall to blind end in the gravity effect.
In aspect another of the inventive method, with some the pre-cutting of accurate spacing or the vibration-damped component made from additive method arranged, do separable supporting with a sheet material, one opening end aligns in each vibration-damped component and the some triggers, and those vibration-damped components are put into these trigger shells simultaneously.
Referring to Fig. 1, show that vibration-damped component 11 of the present invention is placed in the instantaneous trigger 12 of on-electric.Trigger has and forms the tubular housing l3 of being roughly of axial slot 14 within it, and blind end 16 and an opening end 17 relative with blind end l6 are arranged.The sealing annular channel that term " conduit " forms with tubular shell inner surface or sidewall in order to general reference in text.First (ground level charging) of two explosive B Bs charging 20 is placed in the groove, causes charging 22 and is placed in the groove l4, feeds 20 adjacent with ground level.
Ground level charging 20 comprises two explosive B Bs, such as PETN (pentyl) or RDX (cyclotrimethylene trinitramine), and the main output of generator, or signal amplifying power.Cause charging 22 and comprise primary explosive, such as lead azide, 2,4,6-lead trinitro-resorcinate, or DDNP (diazodinitrophenol).The characteristics of this primary explosive are flame for being highly susceptible to form, spark, and the heat that friction or impact produce causes, and is used for igniting with the priming signal reaction, triggers ground level and feeds.
Vibration-damped component 11 and initiation charging 22 placed adjacent, its size is made to be provided and cooperating that the shell madial wall compresses slightly.In desirable embodiment, think that 0.003 to 0.005 inch interference is for suitable; But the degree of compressing can change according to the selected material that forms vibration-damped component, and the ideal restriction of explosive material in groove is provided.
Vibration-damped component 11 is used the yielding material manufacturing that can keep shape, has tender texture to make vibration damping.Desirable vibration damping manufactured materials is a cardboard; But polymer, such as polyethylene, rubber and polyurethane also are fit to do the manufactured materials of vibration-damped component.
The normal operation of trigger requires an apparatus for transmitting signal to transmit priming signal, carries to causing charging 22, with its ignition, triggers ground level charging 20.The form of signal can be the explosion bow wave of shock tube 25, the det-cord of the instantaneous trigger 12 of the detonation front of flame of explosion tube or on-electric (Fig. 1).Signal also can have the form of thermal pulse, such as the pyrotechnic compound timing element 27 in the time fire device 28 (Fig. 2), or be instantaneous and the thermal pulse of the generations such as igniting agent 30 of the bridging line of electronic trigger 32 of time lagged type (Fig. 3) or Lighter (electric match) 31 triggerings.
For with priming signal to causing charging 22 reliable delivery, signal transfer surface 35 of shape in vibration-damped component.Referring to Fig. 1,4,5,6 and 7, the signal transfer surface is a configuration that has a hole at least, has enough spaces that priming signal is passed through, and reaches to cause charging 22, with its initiation.In addition, this configuration should have fully little hole of size again, to play baffle effect, with explosive material 20,22 against blind end 16.The formation of this configuration can be by establishing at least one central through hole 38 (Fig. 4 and 5) on vibration-damped component 11, or establish a central through hole 38 on vibration-damped component 11, covers filter screen 40 (Fig. 6 and 7) above.Referring to Fig. 8 and 9, the formation of signal transfer surface 35 also can be by establishing a central through hole 38 on vibration-damped component, cover with a film 43, play clamping baffle plate or film, and priming signal can more easily be passed through, the reliability that explosive material causes does not have substantial degradation.Suitable membrane material comprises and is bonded at vibration-damped component 11 lip-deep porous thin papers, or with other the non-metal knitted material that priming signal can be passed through.Other membrane materials comprise non-porous inert membrane, such as cellulose acetate, or eliminate material certainly, the nitrocellulose of the high nitrogen content that can decompose rapidly when comprising the contact priming signal.All these film vibration-damped components provide the desirable anti-impact force of desirable improvement.
For making detailed descriptionthe, please note the hole on the element 11, no matter seal, or some less holes are arranged on the vibration-damped component 11 with net 40 or film 43, in its space, fill and cause charging 22, the typical case has lead azide.Amplification Figure 10 represents the configuration of film embodiment; Clear for other are respectively schemed, in other figure, omitted the hole of the filling " ".
With trigger and vibration-damped component of the present invention assembling, the accident that can greatly reduce the trigger explosive material when assembling causes.Referring to Figure 11, at first groove 14 is put in ground level charging 20 and initiation charging 22.Then vibration-damped component 11 is put into groove 14, with push strut 48 shift onto with cause the charging position adjacent on.Because need the gap to make push rod 48 be easy in shell, advance and retreat, between push strut 48 and shell 13, form a little cannelure.When vibration-damped component 11 is pushed away,, therefore prevent deposition in the cannelure 49 of any blasting explosive granules between push strut 48 and shell 13 downwards because the tight fit of vibration-damped component and shell scrapes any remaining explosive material that is bonded on the shell in the groove in the chamber of shell 13.Bulldozing operation carries out when housing 13 upright placements, and blind end 16 is below open end, and in bulldozing operation, any loose explosive that vibration-damped component 11 scrapes is because of gravity drops on without on the explosive material that compresses.
In with vibration-damped component 11 insertion grooves and when being urged, signal transmission surface 35 is overflowed the air that is sealed, thereby prevents to cause the back pressure that makes the vibration-damped component warpage or break.And the little blasting explosive granules of carrying secretly in the air-flow is stopped in the effect of vibration-damped component amicon, thereby prevents that explosive from polluting the space above the vibration-damped component.
Push strut 48 is continued to push in groove 14, vibration-damped component 11 and explosive material 20,22 will be against on the blind end 16 compress.Vibration-damped component 11 is kept push strut 48 and is separated with initiating device 22, and a soft-surface is provided, and reduces friction as far as possible, and contacts the high density that obtains explosive with explosive material simultaneously, avoids explosive material with the crust of push strut 48 very big contacting to be arranged again.Similarly, when using, can provide similar separation and protection between time-delay part and the explosive in conjunction with a time-delay part.
After desirable pressure is added on the explosive material, just push strut 48 to be extracted out from groove 14, vibration-damped component 11 keeps explosive material is compressed in shell.And, on the shell wall in groove, the sticking explosive that stays loose malcompression, thereby the needs of the loose explosive material that elimination cleaning shell inner surface and cleaning are collected, vibration-damped component also can reduce because of trigger reaches in transit when storing as far as possible, vibrates and rock the loose of the explosive material that causes.
Found with the assembling of trigger and vibration-damped component of the present invention, can greatly improve trigger and suppress to impact the ability that causes that the i.e. initiation that causes of external force such as adjacent wellbores borehole blasting, or is hit or the like the shock wave that produces etc. to trigger.Result of the test shows, the trigger of igniting vibration-damped component is housed, and than the trigger that is unkitted vibration-damped component, suppresses to impact or collide and cause the ability of initiation to increase three times.And vibration-damped component is provided with membrane type signal transfer surface 43 (Fig. 9), and the ability that suppresses to impact also more has raising.Result of the test also shows, the vibration-damped component of the present invention of band lamina membranacea aims at the trigger that improves the antivibration ability and design than having earlier in the field, and the antivibration ability of having improved is arranged.
Referring to Fig. 2, often there is requirement that a kind of trigger that delay cell 27 is arranged is provided.Can after being put into housing 12, explosive material and vibration-damped component 11 insert delay cell immediately.Be added in the pressure on the delay cell, be delivered on the vibration-damped component, be communicated to again on the explosive, with the explosive material compacting by delay cell.Otherwise the manufacturing of trigger also can compress explosive by utilizing vibration-damped component, with the explosive material compacting, inserts the time-delay part that can be crushed on the vibration-damped component then, the further seating vibration-damped component of the part of will delaying time, the explosive material of compacting simultaneously.Since in the compaction process of vibration-damped component 11, removed the evacuation particle of explosive material substantially, can be when inserting delay cell in the trigger, the unexpected initiation of trigger that the blasting explosive granules friction ignition that basic elimination is stopped between housing and time-delay part causes.And, eliminate explosive and evacuate particle, reduce trigger and make priming signal walk around the too early initiation of delay element because of explosive is arranged between delay element and housing.
For be easy to assemble under situation about reducing the cost, the typical case assembles some triggers simultaneously with the processing block (not shown) that can hold 50 to 500 shells in the automation assembling process.After these housings are put into processing block, explosive material is put into the conduit of each shell, in order to compression subsequently.Vibration-damped component of the present invention is adapted at using in such automation assembling process.Referring to Figure 12 and 13, some vibration-damped component 11 usable fibers plates are die-cut, or molded with plastics, form hole battle array plate 52, and the formation that each vibration-damped component is located on the battle array plate of hole is consistent with the formation of processing block (not shown).Then hole battle array plate 52 is placed on the top of trigger, each aligns each vibration-damped component on the battle array plate of hole with the openend of a trigger, and whole vibration-damped components are pushed in housing simultaneously.
If trigger has a delay cell 27, delay cell can be placed between each vibration-damped component 11 and the push strut 48, as mentioned above pressure directly is added on the time-delay part with push strut then.
With one or more retention tabs 55 each vibration-damped component 11 is done separable maintenance on hole battle array plate 52, but the material thickness attenuate of retention tab 55 makes it to be easy to be pushed depression bar 48 (Figure 11) and breaks.
It is suitable with the cardboard realization to have found that above-mentioned retention tab links, but available other devices provide separability, and also available other sheet materials.
Though to the present invention just for example embodiment do diagram and narration, be familiar with present technique field person and should be understood that and can do above-mentioned and various other variation it, omit and additional, and without departing from the spirit or scope of the invention.