32 results about "Blasting cap" patented technology

A low-cost, reliable and easy to use kit for neutralizing surface exposed landmine and unexploded ordnance for humanitarian demining is provided. The kit contains a liquid fuel and a solid / soluble fuel. Both fuels are premeasured in separate, sealed containers. The addition of a small quantity of solid / soluble fuel into the liquid creates an explosive. The resulting mixture is capable of detonating with a standard No. 8 blasting cap. The solid / soluble fuel can be in the form of a powder, tablet, or its saturated solution in water. The solid / soluble fuel is hexamethylenetetramine. The liquid fuel, nitromethane, is provided in premeasured quantities. User is provided instructions for choosing the appropriate quantity of liquid fuel, the corresponding solid / soluble fuel required, the method of mixing, placement and detonation of the kits. Also disclosed is a simple wooden stand to hold the bottle of explosive in place. A special fuel, liquid 2-ethylhexylnitrate, is provided to desensitize the mixed and sensitized explosive.

A lightweight explosive containment device that is used to transport blasting caps, explosive precursors, or homemade explosives. Open cellular foam material within the container diffuses explosive gases and absorbs kinetic energy. An internal clapper tube distributes forces to the ligaments of the cellular foam material and an external support tube contains the explosive fragmentation and blast overpressure. A system of containers with storage capabilities that enable the transportation of a number of lightweight explosive containment devices is presented. An alternate configuration of the present invention utilizes the open cellular foam material to create a directional disruption device. Such a tool prevents explosive gases and fragmentation from causing unnecessary collateral damage to the surroundings or supporting robot.

The invention relates to the technical field of cofferdam blasting, and discloses a cofferdam blasting method for reducing water body damage, comprising the following steps: A. Setting a buffer zone: the buffer zone includes an arc-shaped buffer groove, a buffer hole and a buffer slope, and the buffer zone is set at On the matrix around the cofferdam; B. Set up buffer devices: set up buffer devices between the buffer slope and buffer holes; C. Arrange blast holes: dig continuous blast holes inside the concrete cut-off wall of the cofferdam; D. Fill blasting Holes: Distribute the amount of charge and detonators for each blast hole, and charge according to the amount of charge; E. Ignition and detonation. The present invention reduces the influence of the blasting force on the surrounding water body, soil quality and buildings by setting the buffer zone, and plays an obvious role in buffering the range of blasting around the cofferdam; through the setting of the buffer device , so that the first wave of impact force caused by blasting is greatly reduced, effectively blocking the impact force generated at the bottom of the explosion, and then cooperate with the buffer zone to improve the buffering effect.

The invention discloses a hydraulic blasting method for an angle steel structure power transmission tower in a mountainous area. The hydraulic blasting method comprises the following steps that (1) pieces of angle steel with the suitable size are machined according to the structure of the power transmission tower; (2) the suitable positions of the pieces of angle steel are punched, and water bags,cartridge bags and detonating pipe detonators are prepared; (3) a blasting device is transported to the power transmission tower, the first angle steel is connected with the to-be-blasted angle steelto form a cylindrical structure, and the pieces of third angle steel are mounted at the bottom of the cylindrical structure; (4) the water bags and the cartridge bags are alternately placed into thecylindrical structure, and the cartridge bags are guided out of the cylindrical structure through the detonating pipe detonators; (5) the cylindrical structure is sealed at the top through the piecesof third angle steel; and (6) protection, evacuation and vigilance are conducted, and blasting can be conducted after preparing work before blasting is completed. According to the hydraulic blasting method, only the pieces of angle steel and bolts need to be fixed into the cylindrical structure, the water bags and the cartridge bags are placed in the closed space, through incompressibility of liquid water, the blasting damage degree is increased greatly, and the blasting effect can be ensured.

The invention provides a damage control method for blasting excavation of rock-socketed pile foundations in the sea, comprising: sinking the casing to a designated position, drilling a vertical blasthole according to the blasting design; filling sea sand / rock debris into the bottom of the blasthole for buffering Layer laying; place the special combination packaged in an elastic sealed bag at the casing port, and let it fall to the buffer layer by gravity; the special combination includes: a waterproof elastic sealed bag, and placed in the waterproof elastic sealed bag from bottom to top The high-pressure inflatable airbag, iron ball, charge section, and the inflatable tank installed inside the high-pressure inflatable airbag; install the upper seismic source charge column; block the blast hole, pull out the casing, and connect each blast hole to the Internet. The explosive column is detonated by a detonator to carry out rock foundation blasting. The method can effectively control the blasting damage of the pile foundation rock mass, ensure the bearing capacity of the rock-socketed pile foundation, and at the same time enhance the excavation effect of the rock mass to be broken, fully protect the pile foundation rock mass, and is especially suitable for offshore rock-socketed piles under deep water conditions excavation.

The invention discloses a hard rock tunnel blasting excavation method. The hard rock tunnel blasting excavation method comprises the steps that blasting holes are drilled in the rock of a tunnel faceand include cut holes, auxiliary holes, peripheral holes, bottom holes and empty holes, and at least one empty hole is formed in the periphery of each cut hole; the blasting holes are cleaned; explosives are put into the cut holes, the auxiliary holes, the peripheral holes and the bottom holes; a front stemming section, a resisting part and a rear stemming section are put into the remaining part of each cut hole in sequence, the hole opening of each cut hole is tightly wedged by a wedge, branches are arranged on each resisting part, each resisting part is pushed into the corresponding cut holein the forward direction, and the interiors of the remaining parts of the auxiliary holes, the peripheral holes and the bottom holes are plugged by stemming sections; blasting cap leg wires of the explosives are connected, and ignition and blasting are conducted; after the blasting is accomplished, and residue removal is conducted on the blasted tunnel face; and the operation is repeated until hard rock tunnel blasting excavation is accomplished. The tunnel blasting cyclical footage can be increased, and the tunnel excavation speed can be increased.

The invention discloses an explosion welding forming device for titaniumtim and an ordinary low-alloy steel composite head. The explosion welding forming device comprises an ordinary low-alloy steel head base layer, a titaniumtim head composite layer, a buffer layer and a specially-shaped explosive bag. The ordinary low-alloy steel head base layer is arranged on a sandy base layer, the titaniumtim head composite layer is arranged on the ordinary low-alloy steel head base layer and forms a gap with the same, the buffer layer is arranged on the inner surface of the titaniumtim head composite layer and is fit to the same, high explosive is arranged on the inner surface of the buffer layer and is fit to the same, the high explosive and a blasting cap are filled in the center position of the specially-shaped explosive bag, primary explosive is filled in the other parts around the specially-shaped explosive bag, and a sand pile is filled in the upper portion of the specially-shaped explosive bag. The explosion welding forming device is compact in structure, the blasting cap and the high explosive are ignited to enable the bottom of the titaniumtim head composite layer to be welded to the bottom of the ordinary low-alloy steel head base layer, and the other parts of the titaniumtim head composite layer are welded; a bonding zone is free of heat affected zones, joint performance is good, excellent performance can be sustained with no need of strict protection upon the titaniumtim head composite layer during the explosion welding process.

The invention provides a blast cap type ammonia injection and mixing device for selective catalytic reduction denitration. The device comprises a first-stage pipe (1), reactor walls (10) and at least three ammonia injection pipes which are arranged at the same intervals. Each of the ammonia injection pipes comprises at least three second-stage pipes (2), third-stage pipes (3), abrasion-proof plugs (4), abrasion-proof angle steels (11), a sealing box (7), a heat insulation cotton (8) and a regulating valve (9), wherein the sealing box (7) is arranged between the reactor wall (10) and the first-stage pipe (1), the heat insulation cotton (8) is placed inside the sealing box (7), the regulating valve (9) is installed between the sealing box (7) and the first-stage pipe (1), the second-stage pipes (2) are arranged at the same intervals, the three-stage pipes (3) are arranged between the two adjacent second-stage pipes (2), one ends of the three-stage pipes (3) are connected with the second-stage pipes (2), and the other ends are connected with the abrasion-proof plugs (4). The device combines an ammonia injection device with a mixing device, evenly mixing of ammonia and smoke on small scales is achieved, the structure is simple, and the device is convenient to manufacture, assemble and disassemble.