415results about "Blasting cartridges" patented technology

Progressive ammunition press system, components thereof, and associated methods. The press system may include a press control system integrated with the press. The press may include a case carriage including a case carrier supported by a bearing. Case retainer gates may be provided for retaining cases in the case carrier. A bullet feeding system can be arranged to permit bullet feeding and seating in a single station of the press. A primer feeder can be self-contained, gear-driven, and / or recirculating.

The utility model provides a bamboo joint type oxygen inhalation inner core assembly and a fracturing pipe, relates to the technical field of expansion fracturing, and comprises an inner core, the inner core comprises an infusion tube, liquid outlets are arranged in the circumferential direction of the infusion tube, a first quick connector with a central through hole is arranged at the lower end of the infusion tube, a medium layer is arranged outside the infusion tube, and a second quick connector with a central through hole is arranged outside the medium layer. The dielectric layer is used for absorbing liquid oxygen in the infusion tube; the at least one electronic excitation unit comprises an ignition head and an excitation cartridge bag, the excitation cartridge bag is arranged outside the dielectric layer, and the ignition head is used for igniting the excitation cartridge bag; the inner cores are connected end to end through first quick connectors. The oxygen inhalation inner core assembly is formed by sequentially connecting the multiple inner cores end to end, so that the oxygen inhalation inner core assembly can be flexibly adjusted and assembled in the length direction and the radial direction according to the length and the diameter of the fracturing pipe.

Provided herein are shaped-charges having curved walls to provide better controllable and improved liquid jet parameters. The shaped-charge comprises a container having a plurality of curved walls for containing a liquid. One or more explosive charges are immersed in the liquid and a detonator channel positioned through the container wall to controllably detonate the one or more explosive charges and from a wedge-shaped liquid jet. Multipoint initiation is achieved using a number of initiation points; a location of one or more initiation contact points with the geometrically-shaped explosive charges; and / or an initiation timing of each of the initiation contact points, including simultaneous initiation or a sequence of initiations. Also provided are related methods of forming liquid jets and attendant applications, including target disruption.

The invention discloses a multi-stage self-triggering type liquid carbon dioxide grading fracturing method. The method comprises the following steps that early-stage preparation work is conducted on a multi-stage self-triggering type fracturing pipe; liquid carbon dioxide is filled into the multi-stage self-triggering type fracturing pipe; the multi-stage self-triggering type fracturing pipe is placed in a drill hole in the target fracturing position and then connected with an exploder; the exploder is started, and the multi-stage self-triggering type fracturing pipes conduct multi-stage fracturing in sequence; and after fracturing is completed, the multi-stage self-triggering type fracturing pipe is recycled for reuse. The grading self-triggering fracturing device is constructed on the basis of the gas transfer rule and the memory alloy material, the liquid carbon dioxide single-point excitation and multi-stage self-triggering grading fracturing method is provided, and the problems that power of a liquid carbon dioxide fracturing single pipe is insufficient, and wiring of multiple pipes is complex are solved.

A linear shaped charged Electro-Explosive (LSCe) Device includes an initiator in direct and intimate contact with an exposed portion of the LSC's main charge. In different configurations, the initiator's package, initiation charge or initiation circuit (acting over a gap) are in direct and intimate contact with the main charge. The LSCe device may be manufactured by connecting a packaged initiator to an opening in the LSC housing through which a portion of the main charge is exposed or by forming the initiator in situ in a receptacle coupled to the housing around the opening. The LSCe device can be used for such applications as thrust or mechanical termination of an airframe, cable cutting or initiation of a LSC.

The invention discloses a drilling and blasting method tunnel automatic charging robot which comprises a plurality of sets of charging devices, each set of charging device comprises a rubber pipe pushing charging system and a pneumatic conveying charging system which are connected, each rubber pipe pushing charging system comprises a system base, a stock bin mechanism and a cartridge pushing mechanism, and each stock bin mechanism comprises a cartridge storage bin and a charging pipe; the cartridge storage bin is arranged on the sliding bracket and is in sliding connection with the system base; the cartridge storage bin is a cylindrical shell; a round hole in the front end of the charging pipe is connected with the charging pipe; the cartridge pushing mechanism comprises a pushing rubber pipe, the front end of the pushing rubber pipe is used for penetrating into the cartridge storage bin through the round hole, and the cartridge to be loaded into the peripheral hole and the first section of cartridge to be loaded into other holes are pushed to the charging pipe; and the pneumatic conveying charging system is used for blowing the non-first-section cartridge to be charged into the blast hole into the blast hole. The drilling and blasting method tunnel automatic charging robot automatically charges, reduces the number of charging operators at a tunnel face, and ensures that the operators do not directly contact with cartridges.

The utility model provides an upper end cover of a liquid oxygen fracturing pipe suitable for underwater rock mass, and relates to the technical field of expansion fracturing, the upper end cover comprises an end cover body, the upper surface of the end cover body is provided with counter-force petals, the counter-force petals are annularly arranged on the upper surface of the end cover body, and the counter-force petals are arranged on the lower surface of the end cover body. The counter-force petals are arranged on the upper end cover, an acute included angle alpha is formed between the counter-force petals and the axial direction of the end cover body, the counter-force petals are made of semi-rigid materials, the end cover body is used for being detachably connected with a fracturing pipe, and the counter-force petals are arranged on the upper end cover, so that the counter-force petals can be clamped to the inner wall of a blast hole, the buoyancy effect of water on the fracturing pipe is counteracted, and the fracturing effect is improved. And therefore, an operator can mount the fracturing pipe at the bottom of the blast hole.

The utility model discloses a carbon dioxide fracturing device with a flying stopping device, which comprises a fracturing device body which is cylindrical on the whole, a cavity is arranged in the fracturing device body, liquid carbon dioxide is filled in the cavity, and a filling head used for filling the liquid carbon dioxide into the cavity is arranged at the front end of the fracturing device body. A cavity is formed in the fracturing device body, a heating pipe extending into the cavity is arranged on the front side of the fracturing device body, an energy release channel communicated with the rear end of the cavity is formed in the fracturing device body, a constant-pressure shearing piece used for sealing a front end opening of the energy release channel is arranged at the rear end of the cavity, the flying stopping device is arranged at the rear end of the fracturing device body, and a power input end at the front end of the flying stopping device is communicated with the rear end of the energy release channel. The fracturing device is simple and convenient to operate, the working efficiency is greatly improved, the fracturing device and the rock mass are jacked into a whole by utilizing the impact force of high-pressure airflow during blasting, the phenomenon of pipe flying is effectively avoided, and the fracturing device has important significance on the safety of field work and the improvement of the working efficiency and the economic benefit, and can be suitable for larger hole diameter range of blast holes.

An explosive downhole tool includes a housing having an upper housing part on one side of a window section and a lower housing part on an opposite side of the window section. An explosive charge is provided within the housing for at least one of cutting and expanding the wall of the tubular. The outer surface of at least one of the upper and lower housing part is rounded so as to be devoid of corners. The rounded surface eliminates the presence of sharp corners that may catch on restrictions or protrusions in a wellbore so that the downhole tool is more easily conveyable within a wellbore. Another explosive downhole tool includes fins extending from the housing. The fins have a height that decreases in a direction away from the housing. The shape of the fins enables the downhole tool to be more easily conveyable within the wellbore.

The utility model belongs to the field of underwater rock mass fracturing engineering, and particularly relates to an anti-buoyancy lotus-shaped base of an underwater liquid oxygen fracturing pipe and a machining mold of the anti-buoyancy lotus-shaped base. The anti-buoyancy lotus-shaped base comprises a barrel, a conical cap and a plurality of elastic limiting petals, the overall structure is simple, when used, the anti-buoyancy lotus-shaped base is installed at the lower end of the fracturing pipe, the conical cap has the guiding function, and the limiting petals are arranged on the barrel. A step between a sleeve and a drill hole can be easily penetrated through, so that normal running of the sleeve is ensured; and the plurality of elastic limiting petals are elastically propped against the hole wall, so that the facing buoyancy during underwater installation of the fracturing pipe is effectively resisted, the installation of the fracturing pipe at a specified position is ensured, a foundation is built for the subsequent stable operation of the underwater liquid oxygen fracturing pipe, and the safety and reliability of the fracturing pipe in an underwater environment are powerfully ensured. The machining die is simple in structure and low in cost, and batch machining of the anti-buoyancy lotus-shaped base can be achieved.

The header of an EED is redesigned to increase stiction forces to better hold the main charge throughout deflagration. The header includes a main charge holder, integrally formed or as a discrete component, that has internal structure that is press fit to a complementary outer surface of the main charge. The contact area between the internal structure and the main charge being greater than the contact area between a cylinder that circumscribes the internal structure (the uniform cylindrical shape of a typical EED contact area of π*D*L) to increase stiction forces between the main charge holder and the main charge. For a given diameter and length, the inclusion of the internal structure will reduce the mass of the main charge.

An explosion chamber for an avalanche triggering system including a lower half-chamber closed at its lower end and having an opening at its upper end, and an upper half-chamber closed at its upper end and having an opening at its lower end. The lower end of the upper half-chamber extends around the upper end of the lower half-chamber, or the upper end of the lower half-chamber extends around the lower end of the upper half-chamber, so as to create at least one gas flow channel. The gas flow channel includes a baffle formed by the lower end of the upper half-chamber and the upper end of the lower half-chamber.

A perforating gun includes a gun assembly and a gun barrel. The gun assembly includes a charge tube comprising at least one shaped charge. A pin contact assembly is operably attached to a first end of the charge tube and includes a contact spacer and a through pin configured to provide electrical communication between respective perforating guns. An addressable switch assembly is attached to a second end of the charge tube and comprises an addressable switch and a detonator. The gun assembly is situated within the gun barrel and is configured to self-orient inside the gun barrel.

The invention provides an intelligent detonation control method of a wireless digital electronic detonator. The intelligent detonation control method comprises the following steps: receiving an encrypted detonation instruction signal sent by a remote control center through a wireless receiving module; verifying and decoding the encrypted detonation command signal in sequence, and extracting an effective detonation command and matched parameters; a local environment detection module is started, and real-time environment safety parameters are collected and obtained; performing dual verification on the identity identification code of the electronic detonator and the working state of the electronic detonator; based on the decoded detonation parameters, the real-time environment safety parameters and the working state of the detonator verification passing, final detonation control parameters are calculated through a detonation decision algorithm; the final detonation control parameters are output to a detonation module, and the detonation module executes ignition operation; the safe, accurate and controllable detonation of the electronic detonator is realized through the process design of encryption verification, environmental perception, dual verification, multi-source collaborative decision and accurate detonation.

The present invention concerns an explosive material charging device and a method of positioning the explosive material charging device in a borehole. The explosive material charging device comprises a top anchor unit and a bottom anchor unit each configured to engage the borehole wall, an expandable tube member arranged between the top anchor unit and the bottom anchor unit and configured to be charged with explosive material, the bottom anchor unit comprises a backflow prevention valve device configured to prevent the explosive material to flow out from the expandable tube member, wherein the backflow prevention valve device is openable for permitting a charging hose to enter the expandable tube member for reaching the interior of the top anchor unit.

In general, in one aspect, embodiments relate to a detonator assembly that includes a detonator housing that includes a detonating cord receptacle and a detonator receptacle, a detonator seated within the detonator receptacle, a detonating cord seated within the detonating cord receptacle side-by-side the detonator, and a grounding clip that extends lengthwise along a substantial portion of the detonator housing, where the grounding clip extends beyond an axial end of the detonator housing.

The invention discloses a low-sensitivity activator as well as a preparation method and application thereof, and belongs to the technical field of gas fracturing. Potassium perchlorate is used as an oxidizing agent of the low-sensitivity activator, flour is used as a combustible agent of the low-sensitivity activator, and the mass ratio of the potassium perchlorate to the flour in the low-sensitivity activator is (50-70): (10-20). The low-sensitivity activator provided by the invention has the advantages that the mechanical sensitivity, flame sensitivity and static sensitivity of the low-sensitivity activator are at extremely low levels, and the low-sensitivity activator has excellent stability and higher ignition temperature; related tests carried out according to the Program on Dangerous Goods Transport of the United National further show that the activator not only has remarkable gas production rate, but also shows extremely low sensitivity to shock waves, the insensitive characteristic of the activator is even superior to that of a conventional insensitive explosive, and practical application verification shows that the cracking effect of the activator is completely not lower than the level of a metal powder activator.

There is provided a compact electric compressor with a built-in electromagnetic interference (EMI) filter, which can meet the 1W-1A no-fire standard. A compact electric detonator with a built-in EMI filter includes a lead wire composed of a first lead wire and a second lead wire, a cup into which a plug assembly is inserted, wherein the EMI filter through which the first lead wire and the second lead wire pass is installed on the plug assembly, and an adhesive that fixedly bonds an end of the plug assembly and the first lead wire and the second lead wire.

The application provides an underwater bare explosion explosion point positioning and fixed net rack, which comprises a net body, a float, an anchor rod, a lower jacking rod and an explosive box. The net body is a hard metal net, which is provided with net holes with specified sizes, and the float is connected to the top of the net body and can pull the net body upward; the anchor rod is connected to the net body, and the pulling force of the anchor rod can form a balance force with the pulling force of the float, so that the net body is fixed in water; the explosive box is installed at the lower end of the net body through the lower jacking rod and abuts against the reef. The net body fixed underwater is used as a fixing object to fix the explosive on the reef at the bottom of the net body, so that the disadvantage of multiple punching is avoided when multiple explosives are fixed underwater, the explosive can be placed in the explosive box, and the upper and lower telescopic lower jacking rod can make the explosive reach the reef surface at different heights, so that the convenience of explosive fixing is further improved. When installation is performed, the net holes can be used as a reference to determine the explosive installation position, so that the explosive installation efficiency is improved.

An ejection device (100) for a gas generator, the ejection device (100) for ejecting a combustion product, comprising: a detonator (101) with an ignition charge and an ignition area (102) designed to burn the ignition charge; a pyrotechnic device (121) arranged to be burned by burning the ignition charge; a cup (104) made of metal, wherein the cup (104) has a base (107) and a peripheral wall (105), wherein the bottom surface (107) is arranged opposite the ignition area (102), the peripheral wall (105) adjoins a peripheral edge of the bottom surface (107) and is arranged to surround the ignition area (102), wherein the cup (104) further comprises a receiving space (120) which is defined by the peripheral wall (105) and the floor area (107) is formed and receives the pyrotechnic agent (121), wherein the bottom surface (107) of the cup (104) contains a through-hole (108) through which the receiving chamber (120) and an exterior area of ​​the cup (104) are connected, wherein the through-hole (108) is formed by several peripheral through-hole edges (108a, 108b, 108c, 108d), and the adjacent peripheral through-hole edges (108a, 108b, 108c, 108d) are connected to each other at a predetermined connection point, the through-bore (108) contains a narrow part (115) in which the width of the through-bore (108), formed by each of parts of the two peripheral through-bore edges (108a, 108b, 108c, 108d) of the several peripheral through-bore edges (108a, 108b, 108c, 108d), gradually decreases with increasing distance from a center of the bottom surface (107) to the peripheral edge of the bottom surface (107), and the narrow part (115) is closer to the peripheral edge of the bottom surface (107) than a non-narrow part (125) formed by each of the other parts of the two peripheral through-bore edges (108a, 108b, 108c, 108d), and the narrow part (115) is a predetermined part in which stress due to the emission of the combustion product is concentrated, and the bottom surface (107) is designed to be split starting from the narrow part (115), and the peripheral wall (105) is designed to be split.

The invention relates to a film effect igniter (1) comprising an electrical connecting lead (6); a glowing wire (4) connected to the electrical connecting lead; and an ignition material charge (3) forming an active mixture which can be ignited by means of the glowing wire (4); wherein the ignition material charge (3) is composed of an ignition material which is free of heavy metals and contains silver azide. Furthermore, a method for manufacturing a film effect igniter is provided.

The cracking device comprises a liquid storage cylinder, the left end of the liquid storage cylinder is communicated with an injection mechanism, the liquid storage cylinder is communicated with an output mechanism, a heating mechanism is arranged in the liquid storage cylinder, the liquid storage cylinder comprises a shell, and a first inner threaded hole is formed in the right end of the shell. According to the device, a first external thread connecting pipe is twisted in a first internal thread hole, so that a first sealing ring is stressed to be extruded, the contact area between the first external thread connecting pipe and the first internal thread hole can be increased, and after the first external thread connecting pipe is completely screwed in, a first sealing gasket is in contact with the interior of the first internal thread hole; and according to the design of a one-way valve, reverse leakage of gas and liquid can be effectively avoided, and the sealing performance of the device after gas injection is ensured by twisting a second external thread connecting pipe in a second internal thread hole and extruding a second sealing ring.

The utility model discloses a directional energy releasing type segmented carbon dioxide fracturing device relates to carbon dioxide fracturing device technical field, the utility model discloses a pipe body, directional energy releasing component and buffer protection subassembly are connected to the fixed bottom of pipe body with the exhaust grid pipe, and the both sides between pipe body inner chamber are fixed with the energy releasing board of connecting. The utility model discloses a directional energy releasing component, utilizes the directional intercommunication structure of adjusting pipe and exhaust hood, and the meshing limit function of cooperation locking mechanism makes high pressure carbon dioxide gas by adjusting pipe's air inlet opening introduction, along exhaust hood's preset direction concentrated injection subsequently, forms controllable energy release path, and effectively solved the energy dispersion problem that traditional device energy releasing direction is incontrollable, and the meshing locking structure of positioning gear ring and fixed gear ring can accurate fixed to the rotation angle of adjusting pipe, and the pointer mark of combination turntable realizes the quick adjustment and stable positioning of exhaust hood orientation.

The invention discloses a blasting charging structure capable of reducing the rock pulverization rate, which comprises a strong blasting assembly and a weak blasting assembly, the strong blasting assembly and the weak blasting assembly are arranged at intervals, explosives filled in the strong blasting assembly are more than explosives filled in the weak blasting assembly, and the strong blasting assembly and the weak blasting assembly are respectively used as independent individuals. The weak explosion assemblies and the strong explosion assemblies are arranged at intervals, the blasting power of the weak explosion assemblies is compensated through the strong explosion assemblies, then the purpose of blasting is guaranteed, meanwhile, the weak explosion assemblies reduce the blasting power, the pulverization rate of rocks is reduced, follow-up recycling of the rocks is facilitated, meanwhile, use of explosives is reduced, and the cost is saved; in addition, the strong explosion assembly and the weak explosion assembly can serve as independent individuals to be prefabricated in a factory, and the transportation efficiency and the on-site construction efficiency are improved.

The application discloses a kind of carbon dioxide fracturing device excavation methods of subway connecting passage, comprising the following steps: step 1: hole is arranged on working face, including the 4 carbon dioxide fracturing holes of diamond arrangement being arranged in the center of working face, center hole being arranged in the center of the diamond and the peripheral hole around the carbon dioxide fracturing hole, the center hole and peripheral hole are used as buffer empty hole;Step 2: carbon dioxide fracturing device is arranged in carbon dioxide fracturing hole;Step 3: all carbon dioxide fracturing devices are simultaneously detonated;Pick up fracturing device;Step 4: secondary crushing is carried out manually using air pick;The application process is spark-free, easy to operate, and although only the loosening and protrusion of frozen soil can be seen on the working face after blasting, a large number of cracks are generated in the frozen rock-soil layer, and the air pick is easier to operate when manually breaking, compared with pure manual air pick excavation, the application can improve the excavation efficiency and reduce the excavation period.

The application discloses a kind of safe self-destruction device and self-destruction method for underwater special platform, including self-destruction battery component, self-destruction initiator, impact plate detonator and micro-explosive warhead;Self-destruction initiator and micro-explosive warhead are fixedly installed at the assembly charge of underwater special platform, and impact plate detonator is arranged between self-destruction initiator and micro-explosive warhead;Self-destruction device battery component is installed in the cable operating hole of underwater special platform, and self-destruction device battery component is connected with self-destruction initiator by cabin cable;Self-destruction battery component has independent insurance, and is powered by double-logic firmware circuit after being released and is used for sensing water pressure;According to the attitude of underwater special platform, water pressure setting is released, and self-destruction initiator is released by double-logic firmware circuit mode and double-logic circuit checking mode;By presetting the delay parameter of self-destruction initiator, underwater special platform is realized timed detonation.This application can provide self-destruction processing means for the training safety of underwater special platform in deep water environment.

A gas generator includes, an ignition device including an igniter, an igniter holding portion having a tubular shape and being configured to hold the igniter in a state of surrounding the igniter, and a fixing portion made of resin and being configured to fix the igniter to the igniter holding portion, a case having a bottomed tubular shape and being configured to accommodate a gas generating agent which combusts by actuation of the ignition device, the case being made of resin and including a side wall portion with a base end side being connected to the fixing portion, and a closing end portion configured to close a tip end side, and a reinforcing member covering at least the closing end portion, the reinforcing member partially including an opening portion, and having a greater breaking strength than a breaking strength of the case.

The utility model belongs to the technical field of tunnel blasting construction, and particularly relates to a portable energy gathering pipe which comprises an energy gathering shell capable of being opened and closed in the annular direction, two planes distributed at intervals are arranged on the energy gathering shell, and the two planes are symmetrically distributed when the energy gathering shell is in the annular closing state. Triangular energy gathering grooves are formed in the inner side of the plane, the faces, located between the two energy gathering grooves, in the energy gathering shell in an annular closed state are concentric arc faces which are the first arc face and the second arc face respectively, the buckling position of the two ends of the energy gathering shell is located in the middle of the first arc face, and the buckling position of the two ends of the energy gathering shell is located in the middle of the second arc face. And an energy gathering cavity is arranged in the bottom end of the energy gathering shell in a sleeving manner. The device has the advantages that convenient charging of the energy gathering pipes is achieved, the distance between every two adjacent energy gathering pipes is controllable, meanwhile, the direction of the energy gathering grooves is controllable, the influence of human factors on energy gathering blasting is reduced to the maximum extent, tunnel over-excavation is effectively controlled, and concrete over-consumption is reduced.

A fuse assembly that includes a low energy exploding foil initiator (LEEFI) located in a housing thereof. The LEEFI is supported in the housing by a sleeve made of a compliant material that protects the LEEFI by dampening shocks and vibrations applied to the housing. At least a portion of the LEEFI is press-fit into the sleeve such that an interference fit exists between an outer cylindrical wall of the LEEFI casing and in inner wall of the housing. The sleeve includes a latch assembly at one end having a plurality of tabs that are circumferentially spaced-apart from one another. Each of the plurality of tabs includes a cantilever beam having a head, the head including a bottom surface pressed against a top surface of the external annular flange of the LEEFI casing.

The invention discloses a directional fracturing device based on carbon dioxide blasting, and relates to the technical field of carbon dioxide blasting, the directional fracturing device comprises a fracturing cylinder, the top end of the fracturing cylinder is in threaded connection with an inflation head, the bottom end of the fracturing cylinder is in threaded communication with a deflation head, a locking mechanism is arranged outside the fracturing cylinder, and the locking mechanism comprises a fixing disc; according to the directional fracturing device based on carbon dioxide blasting, a worker does not need to use a tool to strenuously fill gravel or soil into a gap between the fracturing barrel and a blast hole, positioning of the fracturing barrel can be rapidly completed, the labor intensity of constructors is reduced, the construction efficiency is improved, and the construction efficiency is improved. The assembly convenience of the cracking cylinder is improved, the connection tightness between the cracking cylinder and a blast hole is increased, the cracking cylinder is prevented from jumping upwards when carbon dioxide is erupted, and the effects of improving the anti-jumping effect of the cracking cylinder and improving the use convenience and reliability of the carbon dioxide blasting directional cracking device are achieved.