32results about How to "Small recoil" patented technology

The invention provides an integrated explosive type reverse-thrust bullet and an emission gun thereof. The bullet comprises a bullet head, a gunpowder cavity and a primer, wherein the gunpowder cavityis a sealed cavity enclosed by the bullet head and a cavity shell; a gun propellant or an explosive is filled in the gunpowder cavity; the cavity shell and the bullet head are integrally formed; a destroying port and a primer groove are further formed in the cavity shell; the primer is loaded in the primer groove; and the primer groove is sealed by a primer cover. According to the integrated explosive type reverse-thrust bullet and the emission gun thereof provided by the invention, the bullet is made to be of an integrated structure, and no disposable cartridge case needs to be specially arranged, so that the recoil is greatly reduced, the shooting frequency, precision and range are improved, the materials are saved, the carrying weight is reduced, and the structure of the gun is simplified.

A general cartridge receiver assembly for front-air-guide firearms is characterized in that a gun barrel is arranged in a cartridge receiver, an air guide protection bush is arranged on the lower side of the front end of the cartridge receiver, a piston rod is arranged in the air guide protection bush, a piston is arranged at the front end of the piston rod, a cavity air guide chamber is reserved on the rear side of the piston, a communication air guide hole is formed between the gun barrel and the air guide chamber, a connecting rod and a firearm bolt shifting rod are arranged at the rear end of the piston rod, a reset spring is arranged on the firearm bolt shifting rod, a firearm bolt is arranged on the rear side of the upper end of the firearm bolt shifting rod, and a cartridge holder is arranged on the lower side of the firearm bolt. An axial firearm bolt spring is arranged on the rear portion of the firearm bolt, an axial firearm bolt lock is arranged in the firearm bolt, an axial firing pin is arranged in the firearm bolt lock, a firing hammer is arranged at the position, arranged at the rear end of the firing pin, of the rear side of the firearm bolt, and a firing gear is arranged at the lower end of the firing hammer. A front-arrangement pushing rod is arranged on the right side of the lower portion of the firing gear, and a trigger is arranged at the front end of the pushing rod. The problem that when a rear-air-guide type firearm performs shooting, a back seat of the firearm bolt affects the firing accuracy is solved, and the general cartridge receiver assembly is suitable for being used by the manufactured firearms such as rifles and submachine guns.

The invention discloses a folding hydraulic power auto-swing fire nozzle, comprising a nozzle, a handle operating mechanism, an outlet bend pipe, a positioning locking mechanism, a inflow bend pipe, avertical shaft, a connecting rod base I, a connecting rod I, a butterfly bolt, a connecting rod II, a connecting rod base II, a sliding block locking mechanism, a sliding block, a round driving disc,a impeller, a driving shell, a cone gear I, a cone gear II, a chassis, a horizontal locking mechanism, a mother board, a stabilizer positioning mechanism and a stabilizer. The impeller is driven by press water to rotate, a pair of cone gears which are meshed with each other are driven by the impeller to pass a horizontal rotating to a vertical direction and the nozzle is driven to swing by a crank connecting link mechanism which is composed of the sliding block, the round driving disc, the connecting rod and the inflow bend pipe. The spraying with a certain of pitch angle and swing frequencycan be realized by the fire nozzle in a broad coverage area; the operation is flexible without human intervention; the folded floor area of the invention is small, thus applicable to storing and moving. The invention is especially suitable to the extinguishing situation in which people are difficult to approach and the fire nozzle needs strong mobility.

An automatic pistol essentially consists of an immovable barrel, a breech with a firing pin and a cartridge extractor, a breech frame, a spring-loaded device for the removal of gas with a gas piston and a gas cylinder, a firing mechanism and a magazine. The barrel is fitted with an end piece, which is located in the lower part of the rear end of the barrel. The design of the breech allows for the displacement of its front part downwards, when the breech is in its front end position. The front part of the breech is fitted with side locking lugs. The corresponding locking grooves are located in the cavities on the end piece of the barrel. The gas piston has an opening for ejecting the cartridge casing. In the course of the backward movement, the gas piston unlocks the breech and draws it back. In the forward movement, the breech is carried forward and pushed downwards. The gas cylinder is located at the front part of the barrel and encompasses the barrel. Along the length of the barrel gas ducts are fixed.

The invention discloses a novel nozzle for a high-pressure washer. The novel nozzle comprises a nozzle body. The nozzle body is provided with a jet hole and a guide channel. One end of the guide channel is provided with a guide channel inlet, and the other end of the guide channel is provided with a guide channel outlet. The guide channel inlet is communicated with the guide channel outlet. The guide channel outlet is communicated with the jet hole. The guide channel is arc-shaped. The center line of the guide channel inlet of the guide channel and the axis of the jet hole form an included angle beta of 60-120 degrees. The novel nozzle for the high-pressure washer and a high-pressure spray gun have the advantages that the arc-shaped guide channel is formed in the front of the jet hole, and accordingly pressure loss of high-pressure water is low; the high-pressure water never bounces back, a jet jetted from the jet hole has a small radiation angle smaller than 5 degrees; the radiation angle of the jet jetted from the jet hole is small, and accordingly stress of the jet is concentrated, the jet can produce large impact force, and cleaning effect is better; the jet is concentrated, and accordingly point-to-point cleaning is achieved.

The invention discloses an HVDC (High Voltage Direct Current) swing check valve, which solves the problems that an existing check valve is opened slowly, the back falling stress during the back falling of a valve flap is large and a high-pressure water attack phenomenon is caused. The HVDC swing check valve comprises a valve seat, a valve flap, a valve cover and a valve body, wherein the valve body is internally provided with a Y-shaped medium passage, the inner wall of the valve body is provided with a cantilever, the cantilever is hinged to the valve flap through a hinging shaft, the hinging shaft is arranged between the end surface of the valve flap and a center line of the valve flap, and the valve flap is provided with a first position which is in sealing with the valve seat and a second position which enables a medium to flow in the medium passage around the hinging shaft. According to the HVDC swing check valve disclosed by the invention, the integrated valve body is adopted, the hinging shaft is directly connected with one side of the valve flap, the cantilever enables the valve flap to be opened and closed more quickly, the valve flap can be flexibly opened and closed in a viscous medium or an unclean medium, and the production cost of products is greatly reduced; in addition, the back falling stress during the back falling of the valve flap is small, the closing time is very short, the service life of the products is greatly prolonged, and the using safety of the products is greatly increased.

The pneumatic pin shaft dismounting tool used for petroleum drilling rigs of the present invention includes an energy storage cylinder, a middle cover, a main piston cylinder, a buffer pad, a guide cylinder, a quick-displacement piston cylinder, a front cover and a sleeve in a serial structure The shell structure is arranged and connected as a whole with a tension screw. The hammer head, piston rod, main piston, firing pin and snap piston are arranged in series and connected together to form an impact part; the impact part is installed in the inner cavity of the shell structure. The invention utilizes energy storage at the rear end of the cylinder, high-speed jet release at the nozzle, and quick exhaust of the front cylinder body to reduce the back pressure of the piston during impact, increase the impact speed of the piston and increase the kinetic energy, and increase the force of the striker on the central axis of the piston rod. The rapid exhaust mechanism ensures that the force of the tool is eliminated and reduces the recoil force during operation, ensuring the continuous working ability of the equipment and the safety of the operator; through the interlocking design of the air circuit control system of the pneumatic pin dismounting tool, it is realized It has the functions of single cancellation and continuous cycle automatic cancellation.

The invention discloses a 3D-printed muffler device, which mainly relates to the field of mufflers. It includes a cylindrical muffler body, and a main air passage that penetrates the muffler body along the axial direction of the muffler body is provided in the middle of the muffler body; the muffler body One end of the muffler is provided with an air inlet end face; the annular array on the outer wall of the muffler body is provided with several curved expansion chamber air passage walls, and the air passage walls between the two adjacent curved expansion chamber air passage walls, the air inlet end face and the outer wall of the muffler main body are arranged in an annular array. The space is a coupled curved surface expansion chamber air channel, and each of the coupled curved surface expansion chamber air channels and the main air channel is provided with several connecting air channels; the annular array in the muffler body is provided with a number of resonance cavities, each of which is A resonance cavity airway is arranged between the resonant cavity and all the coupled curved surface expansion chamber airways; the present invention can separate the air flow in a small space, realize the shunting and mutual coupling of the inner and outer airways, thereby reducing the noise. At the same time, reducing the pressure increase can effectively control the increase in recoil.