90results about How to "Launch fast" patented technology

The invention discloses a rope net type space debris capturing and cleaning system which comprises a transmission subsystem and a fly net subsystem. The transmission subsystem comprises a transmitter, a net cabin, a net cabin cover ejecting device, a buffer device, a tying rope tension control device and a tying rope cutter, and the fly net subsystem comprises a rope net and four mass blocks; a net cabin cover can be ejected out of an outlet of the net cabin, and the rope net can be driven by the net cabin cover to be drawn out of the net cabin; the transmitter works at the moment when the fly net and a tying rope are straightened, the sides of the rope net are driven by four mass blocks according to preset transmitting opening angles, so that the rope net can fly out and is opened simultaneously until the rope net is fully opened, an object is netted after the rope net reaches the objective position, a port of the rope net is tightened under the control of the mass bocks, and the object can be completely captured; after the tying rope draws the captured object aircraft away from an orbit, the tying rope cutter cuts off the tying rope, and the object aircraft can be separated from a satellite platform. The rope net type space debris capturing and cleaning system has the advantages that a secondary transmission mode is adopted, so that twining and knotting can be prevented in rope net spreading procedures; the mass blocks are pushed to be synchronously transmitted, so that a millisecond-level synchronous transmission effect can be realized, and the shape of the rope net can be controlled advantageously.

The invention relates to a transmitting module of a correlated imaging laser radar. The transmitting module is characterized in that the transmitting module comprises a speckle light source, an imaging system, a data memory and a synchronous controller, wherein the speckle light source and the imaging system are fixed on a same base. The transmitting module disclosed by the invention has the characteristics of high pulse transmitting speed, high utilization rate of light energy, capability of effectively reducing ghosting strength of a reference light field, and the like.

The invention discloses a light emitting unit, an optical signal detection module, an optical system and a laser radar system. The light emitting unit comprises a light source subunit, a high frequency modulation subunit and a difference frequency subunit; the light source subunit emits an initial light beam; the high frequency modulation subunit modulates the frequency of the initial light beam via a photomixing technology, and emits at least two different frequencies of high frequency emission signals; the difference frequency subunit caries out difference frequency processing on two randomfrequencies of high frequency emission signals, and emits at least one type of low frequency emission signal; and at least one type of high emission signal and at least one type low frequency emissionsignal as detection light signals are emitted by the light emitting unit. Thus, the initial light beam emitted by the light source subunit is modulated via photomixing and difference frequency technologies, time for light beam modulation is shortened, the detection light signals are emitted at a higher speed, and the detection speed of the laser radar system is improved.

The invention relates to a launcher of an unmanned aerial vehicle, in particular to a catapult of an unmanned aerial vehicle. According to the technical scheme of the catapult of the flywheel-type high-speed unmanned aerial vehicle, the unmanned aerial vehicle is arranged on a tackle and located at a launching position before being launched, a clutch in a power system is in a disconnected state, a motor drives a flywheel to rotate, and the rotating speed is set according to launching requirements; when the unmanned aerial vehicle is launched, the clutch of the power system is connected, the flywheel drives a winding wheel to rotate, a traction rope is wound into the winding wheel and drives the tackle and the unmanned aerial vehicle to move in an accelerated mode, when the tackle moves to a tackle position sensor, the clutch is controlled to be disconnected, the tackle continues to move forwards and is blocked by a blocking device, the winding wheel stops rotating, and the unmanned aerial vehicle flies out accordingly; after launching is finished, the tackle is pulled back to the initial launching position. According to the catapult of the unmanned aerial vehicle, the flywheel serves as an energy storage element and can rapidly accelerate the unmanned aerial vehicle to a large speed on a very short track, and catapult launching of the unmanned aerial vehicle with a high speed requirement is achieved.

The invention discloses an aircraft carrier rocket assist catapult which is mainly composed of a catapult track, a booster rocket and a canister launcher. The catapult track is arranged on a hangar foreground of a shipboard aircraft. The shipboard aircraft catapults directly on the catapult track. The rear side of the catapult track and a hangar floor are located in the same plane and connected through a pin shaft, a catapult track groove is formed in the middle, the rocket canister launcher is arranged on the lower side, and an upper opening of the canister launcher is tightly attached to the track groove. A sliding block tractor is arranged in the groove. A tractor hanging machine pull rod part is arranged on the upper portion of the catapult track, and a rocket hanging device is arranged on the portion, stretching into the canister launcher, of the lower portion of the catapult track. A backflow discharge flue and the canister launcher are arranged side by side. The booster rocket can be repeatedly used. After a first airplane is ignited and launched, the canister launcher is blown, then an appropriate amount of liquid propellant is injected into the booster rocket, and ignition is carried for launching again. The front and back slope of the catapult track can be adjusted through a hydraulic lifting device, and the sliding block tractor and the canister launcher automatically return under the effect of a spring and the track slope.

The invention provides an electromagnetic transmitter with annular connectors to overcome the defects that power is supplied to an existing electromagnetic gun through a guide rail, contact and friction exist between a warhead and the guide rail, so that the speed cannot be increased, and sparks and ablation may happen. According to the electromagnetic transmitter with the annular connectors, a warhead coil and a power source are connected through the annular connectors, power can be cut off automatically, and a warhead can be disengaged from a transmitting tube opening when the warhead flies out of the transmitting tube opening. Photoelectric controllers and electromagnetic relays are used for controlling the current of various coils and the direction of a switch, the multiple transmitting coils can exert electromagnetic force at the same time, the warhead can obtain larger electromagnetic force and higher acceleration, the manufacturing technology is very simple, and the electromagnetic transmitter is more economical and reliable and can be put into use immediately.

The invention discloses an electromagnetism rail gun which the structure is: the insulation material is between the first rail and second guide rail which are all opened with the symmetrical 'V' slot. The angle of the slot is 30-60degree. The solid armature is set between the first and second guide rail. The two symmetrical side wings extend to both sides from the body which the shape and size is matched to the 'V' slot. The upper and lower surface of the two side wing front contacts with the 'V' slot to form the electrical contact surface of the solid armature and the guide rail; the back end of the two side wings are separate with the two guide rail. The invention can control the damage of the transitional voltaic arc, so it can prolong the gun using life but getting the higher shooting speed (>3kms), so it has the widely future.

The invention relates to a hole-bottom tubular linear motor electric impactor which comprises a motor outer cylinder, a permanent magnet rod, a linear ball bearing, a rotor, rotor silicon steel sheets and a rotor coil. The motor outer cylinder is an outer shell of a linear motor. The permanent magnet rod is fixed to the motor outer cylinder and serves as a stator of the linear motor. The rotor moves relative to the permanent magnet rod through the linear ball bearing. An iron core composed of the rotor silicon steel sheets is inlaid inside the rotor. A groove is formed in the iron core and internally provided with the rotor coil. A three-phase alternating current winding is adopted for the coil, and the three-phase symmetrical alternating current is led into the coil to generate a traveling wave magnetic field coincident with the rotor in the movement direction. Two damping springs are further arranged to be used for buffering shock. According to the hole-bottom tubular linear motor electric impactor, a movable-coil type structure is adopted, namely, the permanent magnet rod and the iron core are fixed, and the coil is movable. Meanwhile, a buffering gasket is designed between the rotor and a base, and the fatigue resistant service life of the hole-bottom tubular linear motor electric impactor is prolonged. The hole-bottom tubular linear motor electric impactor is simple and firm in structure and low in manufacturing and maintenance cost, the impacting stroke speed and the impacting stroke frequency are easy to adjust, and the hole-bottom tubular linear motor electric impactor is high in efficiency and can be used for deep hole drilling.

The invention provides an air gun launching device with a quick release mechanism. The air gun launching device includes an air compressor, an air inlet valve, an air chamber, a launch valve, a firstpressure sensor, a second pressure sensor, a quick release mechanism, a PLC, a Laval acceleration pipe and a launching tube. The air compressor is connected with an air inlet of the air chamber through the air inlet valve, an air outlet of the air chamber is connected with one end of the quick release mechanism through the launch valve, the other end of the quick release mechanism is connected with the launching tube through the Laval acceleration pipe, the first pressure sensor is disposed at the position of the air chamber and used for monitoring a pressure value in the air chamber, the second pressure sensor is disposed at the position of the launch valve to be used for monitoring a pressure value of gas released at the position of the launch valve, and the PLC is electrically connectedwith the air inlet valve, the launch valve, the first pressure sensor, the second pressure sensor and the quick release mechanism. The device enables launched air flow to flow out quick evenly massively in a short time, and acts on the bottom of a projectile to promote the movement of the projectile.

The embodiment of the invention discloses a method and device for initiating cell reselection, a terminal and a storage medium, and the method comprises the steps that UE determines the voice capability of the UE and a voice scheme supported by a current resident cell; and the UE initiates cell reselection according to the voice capability of the UE and the voice scheme supported by the current resident cell.

A pneumatic firing device includes a rear section engaging a cylinder, a solenoid valve engaging the rear section from under, an adjusting element disposed inside the rear section, a piston disposed inside the cylinder to form a first chamber and a second chamber, an airflow guiding element engaging the cylinder at a front thereof, a moving rod having a tail end engaging the piston and a front end stretching through the cylinder into the airflow guiding element for operation control of the airflow guiding element, and a front section engaging a front of the airflow guiding element and having a plurality of passage to displace the delivery tube through a hole thereof. The solenoid valve holds control of the operation of a pressure release channel to change the pressure difference between the first and second chamber, making the pressured air entering a first passage from a first guiding hole of the airflow guiding element, pushing the delivery tube to a firing position, flowing into a second passage from a second guiding hole, and then firing a pellet with strong airflow.

The invention discloses a device and method for establishing an instant discussion meeting. The device for establishing the instant discussion meeting comprises a service system, an instant communication messaging system and a database system, the service system is used for completing initiation of the instant discussion meeting and generating a finishing notification of the instant discussion meeting; the instant communication messaging system is used for establishing the instant discussion meeting and starting meeting discussion according to the initiation of the instant discussion meeting by the service system; the database system is used for storing meeting minutes when the meeting discussion in the instant communication messaging system is finished. According to the device for establishing the instant discussion meeting, the service system and the instant communication messaging system are combined, the meeting can be initiated by utilizing the service system without utilizing the instant communication messaging system, and therefore the device for establishing the instant discussion meeting is convenient.

The ion generator for purifying and sterilizing device includes one support frame, one positive ion generator rack and one negative pole dust collector rack set alternately on the support frame, one positive ion generator and one negative pole dust collector in the corresponding racks separately, and one power source connected to the positive ion generator and the negative pole dust collector. The negative pole dust collector includes two negative pole tubes and one plate on one of the negative pole tubes; and the positive ion generator is one bipolar positive ion generator. The device of the present invention may be used in different air purifying apparatus, central air conditioner, household air conditioner, automobile, etc for purifying and sterilizing.

The invention discloses a floor-drain inner core. The floor-drain inner core comprises a liquid guide pipe and a liquid sealing part. An outwards-extending outer boss is arranged at the upper end of the liquid guide pipe. An opening in the lower end of the liquid guide pipe extends into the liquid sealing part. A water outlet is formed between the upper end of the liquid sealing part and the pipe wall of the liquid guide pipe. According to the floor-drain inner core, as the outer boss is matched with a water outlet hole in a water outlet groove of the floor drain, the water outlet hole is covered with the upper portion of the liquid guide pipe, and a height difference is generated between the opening in the lower end of the liquid guide pipe and the water outlet, a water seal with a certain height is formed in the liquid sealing part, and peculiar smells in a pipe are prevented from being outwards diffused from the floor drain.

The invention relates to a pathology determining auxiliary device, in particular to an intra-operative pathological tissue quick extracting device which comprises a syringe, a piston, a hollow push-pull rod and a needle. The piston is arranged in the syringe, the hollow push-pull rod is fixedly connected with the tail end of the piston, the needle is arranged at the front end of the syringe, an 'H'-shaped tissue pushing mechanism which extends into the piston is arranged at the front end of the inside of the needle, and a 'T'-shaped pushing mechanism is arranged at the rear end of the hollow push-pull rod, penetrates into the hollow push-pull rod from the rear end of the hollow push-pull rod and extends to the rear end of the piston; a cavity is arranged inside the piston, a first throughhole which is communicated with the cavity is formed in the front end of the piston, and a second through hole which is communicated with the cavity is formed in the rear end of the piston. The intra-operative pathological tissue quick extracting device has the advantages that tissues can be extracted by the intra-operative pathological tissue quick extracting device in sterile environments, a seal cover can sleeve the intra-operative pathological tissue quick extracting device after the intra-operative pathological tissue quick extracting device is disinfected and can be directly pulled downin operation, and accordingly the intra-operative pathological tissue quick extracting device can be used; tissue extracting procedures are convenient and speedy, and the intra-operative pathologicaltissue quick extracting device is high in safety.

The invention discloses an anti-blocking self-suction type drainage valve element and related drainage equipment. The valve element comprises an upper shell (1) and a lower shell (2); the upper shell(1) is a cylinder with two open ends; an annular convex edge (11) is formed on the inner side wall of the upper shell in the circumferential direction; the lower shell (2) comprises a tray (22) located at the lower end and at least one cantilever (21) extending upwards from the side edge of the tray (22); the upper end of the cantilever (21) is connected with the upper shell (1), the tray (22) extends upwards to form a guide column (23), and the guide column (23) is sleeved with a sealing cover (3); repelling permanent magnets (41 and 42) are embedded into the sealing cover (3) and the guide column (23) respectively, and the repulsive force of the repelling permanent magnets can eject the sealing cover (3) upwards; the sealing cover (1) is in close contact with the convex edge (11) to sealthe drainage valve element. The valve element is rapid in water draining, not easy to block, smooth in sliding and easy to clean, and the magnets are convenient to replace.

A pneumatic firing device includes a rear section engaging a cylinder, a solenoid valve engaging the rear section from under, an adjusting element disposed inside the rear section, a piston disposed inside the cylinder to form a first chamber and a second chamber, an airflow guiding element engaging the cylinder at the front thereof, a moving rod having a tail end engaging the piston and a front end stretching through the cylinder into the airflow guiding element for controlling the operation of the airflow guiding element, and a front section engaging the front of the airflow guiding element. The solenoid valve holds control of the operation of a pressure release channel to change the pressure difference between the first and second chamber, making the pressured air entering a first passage from a first guiding hole of the airflow guiding element, pushing the delivery tube to a firing position, flowing into a second passage from a second guiding hole, and then firing a pellet with strong airflow.

The invention belongs to the field of underwater launching, and in particular relates to a discarding petal capable of reducing fluid resistance. The discarding petal is formed by fastening four petals through an annular elastic belt, and is divided into a front-end circular-truncated-cone segment and a rear-end cylindrical segment, wherein the front end surface of the circular truncated cone hasan inclination angle inward. The interior of the discarding petal is provided with a through hole, and the rear end surface of the discarding petal has an inclination angle inward. The diameter D1 ofthe front end of the circular truncated cone of the discarding petal is determined by the cavitation diameter D formed by the projectile on the front end surface of the discarding petal, and D1 is 2-3mm larger than D2. According to the discarding petal provided by the invention, when the discarding petal leaves the chamber, water flows impact on thecircular-truncated-cone-shaped front end surface, and the front end surface becomes a cavitation device of the discarding petal, so that cavitation capable of wrapping the discarding petal is formed, the stress area of the front end surface of thediscarding petal is reduced by 40% or above, the resistance to the discarding petal leaving the chamber can be reduced to a certain extent, and the underwater launching speed is improved. The front end of the discarding petal adopts a circular truncated cone structure so as to reduce the bending deformation of the front end of the discarding petal.

The invention discloses equipment and a method for handling individual anti-terror and sudden affairs by utilizing high-energy laser. The equipment comprises a handheld part and a knapsack part; the handheld part comprises a light beam focusing module, an aiming module and a distance measuring module; the aiming module is used for searching a target and realizing definition identification on the target; the distance measuring module is used for obtaining distance information of the target identified by the aiming module; the light beam focusing module is used for focusing laser generated by a laser unit of the knapsack part according to target distance, so that focused high-energy laser is irradiated on the target; the knapsack part comprises the laser unit, a power supply module and a control module; the laser unit is used for generating laser; the power supply module is used for providing a direct-current power supply for other modules of the equipment; and the control module is used for controlling the laser unit, the light beam focusing module, the aiming module and the distance measuring module. According to the equipment, laser is taken as a working medium, so that the target can be burnt or combusted, and therefore, denying and diffusing effects are achieved.

A satellite operation simulation device disclosed by the present invention includes a simulation box. The simulation box is provided with a simulation cavity, and an air suction pump is fixed in the inner wall on the right side of the simulation cavity. The air is drawn out and simulates the vacuum environment in space. The simulation cavity is provided with a simulation device. The simulation device generates a magnetic field through two magnetically opposite magnets, and the two magnets are connected through a magnetically conductive coil respectively. Hemispherical body, the device can perform human-computer interaction, thereby improving the personal experience of the person, and can artificially adjust the launch speed to simulate the operation of satellites at different launch speeds, and can emergency stop the device during operation to avoid accident occur.

The invention discloses a self-adaptive pavement deceleration strip, and relates to the technical field of deceleration strips. The self-adaptive pavement deceleration strip comprises a bottom plate,a casting is welded to the top of the bottom plate, drainage grooves distributed in a row shape at equal intervals are formed in the casting, front ends and rear ends of the drainage grooves penetratethrough the front side and the rear side of the casting correspondingly, a water accumulation preventing mechanism is arranged in the middle of each drainage groove, and a splashing preventing mechanism is arranged in each drainage groove; and the water accumulation preventing mechanism comprises a water collecting tank, a pin shaft, a sliding cylinder, a rotating piece, an air bag, a wire grooveand a stretching soft rib. According to the self-adaptive road surface deceleration strip, the water accumulation prevention mechanism is matched with the splash preventing mechanism, the height of accumulated water on the road surface serves as a signal for autonomous operation, flowing of road surface runoff in the direction towards a road surface drainage facility is effectively promoted, thedrainage effect is improved, and meanwhile the height of accumulated water around the deceleration strip can be controlled; and a road runoff flow velocity can also be hindered by reducing the accumulated water height.

The invention relates to an efficient ball serving device, in particular to an efficient ball serving device for tennis training. The efficient ball serving device for tennis training achieves the technical purposes that the tennis serving speed is high, tennis balls cannot be clamped during ball serving, the ball serving efficiency is high, and continuous ball serving can be achieved. In order toachieve the technical purposes, the efficient ball serving device for tennis training comprises a base plate, a left supporting plate and the like; a driving device is arranged above the base plate,a transverse plate is arranged on the top of the driving device, a first push rod is arranged on the left side of the top of the transverse plate, the left supporting plate is arranged on the left side of the top of the base plate, and a first track is arranged on the top of the left supporting plate. The effects that the tennis ball serving speed is high, tennis balls cannot be clamped during ball serving, the ball serving efficiency is high, and continuous ball serving can be achieved are achieved, the driving device drives the first push rod to move leftwards, a movable device drives the first push rod to move upwards, and therefore the first push rod can push tennis balls to move forwards.

A pneumatic firing device includes a rear section engaging a cylinder, a solenoid valve engaging the rear section from under, an adjusting element disposed inside the rear section, a piston disposed inside the cylinder to form a first chamber and a second chamber, an airflow guiding element engaging the cylinder at a front thereof, a moving rod having a tail end engaging the piston and a front end stretching through the cylinder into the airflow guiding element for operation control of the airflow guiding element, and a front section engaging a front of the airflow guiding element and having a plurality of passage to displace the delivery tube through a hole thereof. The solenoid valve holds control of the operation of a pressure release channel to change the pressure difference between the first and second chamber, making the pressured air entering a first passage from a first guiding hole of the airflow guiding element, pushing the delivery tube to a firing position, flowing into a second passage from a second guiding hole, and then firing a pellet with strong airflow.

The invention relates to an efficient ball serving device, in particular to an efficient ball serving device for tennis training. The efficient ball serving device for tennis training achieves the technical purposes that the tennis serving speed is high, tennis balls cannot be clamped during ball serving, the ball serving efficiency is high, and continuous ball serving can be achieved. In order toachieve the technical purposes, the efficient ball serving device for tennis training comprises a base plate, a left supporting plate and the like; a driving device is arranged above the base plate,a transverse plate is arranged on the top of the driving device, a first push rod is arranged on the left side of the top of the transverse plate, the left supporting plate is arranged on the left side of the top of the base plate, and a first track is arranged on the top of the left supporting plate. The effects that the tennis ball serving speed is high, tennis balls cannot be clamped during ball serving, the ball serving efficiency is high, and continuous ball serving can be achieved are achieved, the driving device drives the first push rod to move leftwards, a movable device drives the first push rod to move upwards, and therefore the first push rod can push tennis balls to move forwards.

The invention discloses a novel fire-fighting projectile and a launching system thereof. A break bulk fuse, a projectile powder box, a push plate, a projectile body, a fire extinguishing agent box, aprojectile band and a projectile tail assembly, wherein the break bulk fuse is mounted on the front end portion of the projectile body, the projectile powder box is arranged between the break bulk fuse and the push plate, the push plate is arranged at the front end of the fire extinguishing agent box, the fire extinguishing agent box is installed in the projectile body, the projectile band is arranged at the bottom end of the projectile body, the projectile tail assembly is installed at the rear end of the projectile body. The novel fire-fighting projectile launching system mainly consists ofa fire-fighting projectile launcher, a sighting device, sighting point solving software, a fire-fighting projectile firing table, a fire-fighting projectile transport cart and a fire-fighting equipment / material transport cart. By means of the novel fire-fighting projectile and the launching system, fire-fighting materials and life-saving equipment can be quickly and accurately delivered to an inaccessible fire scene within short time, and the characteristics of being long in transmission distance, high in launching speed, high in emission precision, safe, reliable and the like are achieved.

A simulation device is provided for automated prediction of impact measures based on occurrences of physical events. The simulation device includes a plurality of sensors and circuitry configured to detect the occurrences of the physical events based on predefined event parameters, measure impacts of the physical events on a physical object based on impact parameters, dynamically capture characteristics of the physical object and generate characteristics parameters based on the captured characteristics, identify a plurality of records associated with predefined events impacting the physical object and transfer the records to a portfolio, generate a rate value based on the predefined event parameters and the characteristics parameters, and estimate a cost for transferring a record, and dynamically provide forward- and backward-looking impact measures based on at least one of (i) a variation of the rate value and (ii) the portfolio including the plurality of records.

The invention discloses a small two-stage light-gas gun and relates to a light-gas gun. The small two-stage light-gas gun comprises a cylinder barrel, a pressure transmitting tube, a pressing column, a launching tube, a piston handle, a pressure transmitting body, a membrane, a membrane rupturing device, a first sealing ring, a metal sealing ring, a support and a plurality of supporting seats; a piston on the piston handle is in sliding contact with the inner circumferential surface of a gas chamber; one end of the pressure transmitting tube is connected with a gas port in a threaded manner, and the pressure transmitting tube is hermetically connected with the pressing column; the pressure transmitting body is mounted in the pressure transmitting tube; the first sealing ring and the metal sealing ring are mounted in a mounting groove from the inside to the outside, the membrane is hermetically connected with the membrane rupturing device, and the membrane rupturing device is hermetically connected with the launching tube; the cylinder barrel is mounted on the support, and the pressure transmitting tube and the launching tube are respectively detachably connected onto the supporting seats. The small two-stage light-gas gun has the advantages that problems that an existing light-gas gun is driven by gunpowder at a primary stage, accordingly, environments are polluted, occupied space is large, sealing cannot be carried out in a membrane rupturing procedure implemented by the aid of high-pressure gas and the bullet launching speed cannot be increased are solved, and the small two-stage light-gas gun is used in fields of spacecrafts or research on material performance and the like.

The invention relates to a volleyball feeding device which comprises a ball storage device, a ball pushing mechanism and a worm wheel and worm driving mechanism, wherein a funnel with an upward belled mouth is arranged at the upper part of the ball storage device and an open ball feeding channel is connected at the lower part of the funnel; the ball pushing mechanism is arranged in the ball feeding channel and can axially slide along the ball feeding channel, and the balls are pushed off from the ball feeding channel when being positioned in the push-out position of the ball pushing mechanism; the balls in the funnel and in the return position of the ball pushing mechanism drop into the ball feeding channel; and the worm wheel and worm driving mechanism drives the ball pushing mechanism to make reciprocating motion in the ball feeding channel. The invention enables the balls to be continuously launched out and accurately provides a volleyball source in time for the training apparatus to meet the use requirements of training of the professional athletes.

The invention relates to a hole bottom tubular linear motor electric impactor, which comprises a motor outer cylinder, a permanent magnet rod, a linear ball bearing, a mover, a mover silicon steel sheet, and a mover coil. The outer cylinder of the motor is the shell of the linear motor, the permanent magnet rod is fixed on the outer cylinder of the motor, and the permanent magnet rod is used as the stator of the linear motor; the mover moves relative to the permanent magnet rod through the linear ball bearing; The iron core is composed of silicon steel sheets. There are slots in the iron core, and mover coils in the slots; the coils use three-phase AC windings, which are used to connect to three-phase symmetrical alternating current, and generate a traveling wave magnetic field that is consistent with the moving direction of the mover; There are two shock absorbing springs for shock absorption. The impactor adopts a moving coil structure, that is, the permanent magnet rod and the iron core are fixed, and the coil moves. At the same time, a buffer gasket is designed between the mover and the base to improve the anti-fatigue life of the impactor. The impactor has a simple and firm structure, low manufacturing and maintenance costs, easy adjustment of impact stroke speed and frequency, high efficiency, and can be used for deep hole drilling.

The invention relates to a lead-free combined firework concentrated in emission and filled with gunpowder. The bottom of each tubular body is provided with an explosive groove used for improving the concentration strength of gunpowder emission; the bottom face of each gunpowder groove is provided with a fire leading hole which is a through hole; the bottom face of a firework body is provided with a fire leading groove; the fire leading holes are communicated with the fire leading groove in the bottom face of the firework body; and the fire leading holes and the fire leading groove are filled with slip casting gunpowder. The lead-free combined firework concentrated in emission and filled with the gunpowder solves the problem that a lead, a glue lead, a cutting lead and an inserting lead need to be made for a combined firework, the work procedures are reduced, cost is reduced, safety is improved, and the problems that in the firework set-off process, rolling movement happens, the emission force is not concentrated, and direction is not stable are also solved.