34results about How to "Reduce frontal impact" patented technology

A mineral particle swirling flow pneumatic conveying system comprises an air supply device, a feeding device, air conveying pipes, a swirling flow generating system, replenishment swirlers, an accelerating chamber, a conveying pipe and a collecting device. An air outlet of the air supply device is connected with an air inlet of the swirling flow generating system and replenishment air inlets of the replenishment swirlers separately. An air outlet of the swirling flow generating system is connected with an air inlet of the accelerating chamber. A discharging outlet of the feeding device is connected with a feeding inlet of the accelerating chamber. An air and material outlet of the accelerating chamber is connected with an air and material inlet of the conveying pipe. A plurality of replenishment swirlers are evenly arranged at intervals on the conveying pipe in the direction of conveying. Each replenishment swirler is arranged in front of a corresponding section of bent pipe of the conveying pipe. An air and material outlet of the conveying pipe is connected with a feeding inlet of the collecting device. According to the mineral particle swirling flow pneumatic conveying system, the critical conveying speed of mineral particles is reduced, particle deposition and pipeline clogging are relieved, bent pipe abrasion and particle damaging are mitigated, the service life of conveying pipelines is prolonged, and the safe and efficient long-distance delivery of the mineral particles in the pipelines is achieved.

The invention relates to the technical field of die-casting dies, and provides a die-casting die for producing a shell and a shell production method.The die-casting die comprises a movable die assembly, a fixed die assembly and a sliding block mechanism, and a product cavity is formed among the movable die assembly, the fixed die assembly and the sliding block mechanism; the runner assembly is provided with a feeding sleeve and a sprue spreader arranged on the movable mold assembly, a feeding runner communicated with the product cavity is formed between the upper surface of the sprue spreader and the lower surface of the fixed mold assembly, the feeding sleeve is communicated with the feeding runner, and the thickness of the feeding runner in the direction from the sprue spreader to the product cavity is gradually reduced. And the joint of the feeding runner and the product cavity is linear. Compared with the prior art, the die-casting mold has the advantages that the joint of the feeding runner and the product cavity is arranged to be linear, so that the feeding speed of the shell and the speed of discharging gas out of the product cavity are increased, and the die-casting defects of material shortage, air holes, fluffy structure and the like of a plurality of positioning columns arranged on the shell are prevented.

The invention discloses a wave retaining wall for water conservancy dam. The wave retaining wall comprises a plurality of wall units, wherein each of the wall units comprises a base, a first fence wall, a second fence wall, a third fence wall and a water retaining wall, the first fence wall is arranged on the base and comprises a plurality of first wave retaining strips, and a first flow splitting gap is formed between every two adjacent first wave retaining strips; the second fence wall is arranged on the base and is located behind the first fence wall, the second fence wall comprises a plurality of second wave retaining strips, the second wave retaining strips correspond to the first flow splitting gaps, and a second flow splitting gap is formed between every two adjacent second wave retaining strips; the third fence wall is arranged on the base and is located behind the second fence wall, the third fence wall comprises a plurality of third wave retaining strips, and the third wave retaining strips correspond to the second flow splitting gaps; and the water retaining wall is arranged on the base and is located behind the third fence wall. According to the wave retaining wall, the impact force of water waves can be reduced step by step through the first fence wall, the second fence wall and the third fence wall, and therefore the impact of the water waves on the water retaining wall can be reduced, and the service life of the wall element is prolonged.

The invention relates to a siphonic energy-saving blowing gun which comprises a handle, a wrench and a spray nozzle, wherein the upper end of the wrench is connected with the upper end of the handle, and rotates around the upper end of the handle, the spray nozzle is connected with the upper end of the handle on one side where the wrench is position, an air inlet joint is arranged at one end of the spray nozzle, an air outlet pipe is arranged at the other end of the spray nozzle, the internal diameter of the air inlet joint is smaller than that of the air outlet pipe, one end of the air inlet joint is communicated with the air outlet pipe through a central hole, transverse through holes are symmetrically formed in the center positions of the two sides of one side wall of the air outlet pipe, elliptical inclined holes are formed in the positions of the transverse through holes, the transverse through holes are formed in the centers of the elliptical inclined holes, the inclined angle between the long axis of each elliptical inclined hole and the central axis of the air outlet pipe is 15 degrees, and the bottoms of the elliptical inclined holes are communicated with the transverse through holes through inclined planes. The siphonic energy-saving blowing gun has a simple structure, pressurizes the compressed air by the siphon principle, is remarkable in effect, and is low in production cost.

The invention discloses a stable floating-debris-preventing floating tube type hydraulic electrogenerating device which structurally comprises an anti-blocking cover, a sealing floating tube, a connecting frame, a fixing ring, a support, a barrel body, a horizontal water diversion plate and a bottom water diversion plate. The left side of the anti-blocking cover is nested to the outer surface of the right side of the barrel body, and the sealing floating tube is fixed above the barrel body. Compared with the prior art, the contact area between the device and water is enlarged on the horizontalface and the vertical face through the horizontal water diversion plate and the bottom water diversion plate, impact force of water flow on the front face of the device is reduced, the counter-actingforce of the device on water is improved, device is higher in stability, the problem that the device direction is changed, water flow cannot impact a water wheel, and power generation efficiency is affected is avoided, a rotating body has rotating force by means of accelerated water flow inside the barrel body through a water blocking plate, a water blocking block is impacted by water to enable an impurity grabbing net to be shrunk to grab small impurities and fish which penetrate through the anti-blocking cover in water flow, the small impurities and fish are thrown out through movable exhaust holes, and the rotating water wheel is prevented from being entangled or damaged.

The invention discloses an environmental protection water treatment intercepting device, comprising an intercepting dam, the intercepting dam being a concrete pouring dam; the upper end of the intercepting dam is formed with a plurality of upwardly protruding diverting blocks, and the diverting blocks and the intercepting dam are a pouring integrated structure , the diverter blocks set at intervals can pass pedestrians without affecting the flow of water. A shunt channel is formed between the adjacent shunt blocks, a V-shaped drainage port is formed at the rear of the shunt channel, and the width of the drainage port gradually increases backward; a filter plate is assembled in the drainage port, and the The front end of the filter plate is provided with a flat plate part, and filter holes are evenly distributed on the flat plate part; in this device, the positive installation of the filter plate can realize water filtration, and the reverse installation of the filter plate can also realize water filtration, but it will be A channel is formed between the bottom of the filter plate and the intercepting dam for aquatic organisms to pass; while satisfying water filtration, it can also ensure the return of organisms.

The anti-explosion angle seat valve comprises a valve body, a silencer, a front cover, a piston rod, a piston, an exhaust pressure regulating connector, a rear cover, a cylinder barrel, a reset spring, a guide groove, a limiting plate, a first spring, a damping shaft sleeve, an elastic component and a plug. A water drainage damping mechanism is further arranged in the valve body. Compared with the prior art, the hemispherical plug is matched with the staggered arc-shaped groove, and the technical problem that in the prior art, when a piston closing pressing plate and a water flow opening are closed, water pressure fluctuates violently, and consequently a valve body vibrates violently is solved. Meanwhile, due to the fact that the drainage damping mechanism is arranged in the groove, the problem that the water pressure is too large when the groove is closed by the plug is further solved; and the damping shaft sleeve is arranged between the piston rod and the plug, so that the impact of water flow on the plug can be greatly reduced.

The invention belongs to the technical field of explosion-proof doors, and specifically relates to a self-recovering explosion-proof door for vertical air shafts in mining areas, including a base, an explosion-proof barrel, a mounting plate, a limit plate, an anti-collision block, a sliding cylinder, an impact-resistant plate, Rotating cylinder, support shaft, No. 1 spring and counterweight; in the present invention, the shock wave generated by the explosion is used to cooperate with the large-pitch spiral groove to realize the automatic rotation of the rotating cylinder, and then automatically realize the alignment of the No. 1 through hole and the No. 2 through hole, and then Realize the automatic and rapid dissipation of the shock wave after the explosion; and the shock wave generated in the shaft needs to overcome the elasticity of the No. 1 spring and the gravity of the counterweight during the process, so as to weaken the shock wave generated by the explosion to a certain extent, and will not damage the surrounding area. The environment produces a large shock; at the same time, the rebound force of the No. 1 spring and the self-gravity of the counterweight are used to stagger the No. 2 through hole and the No. 1 through hole, thereby realizing the automatic sealing of the explosion-proof door, thereby reducing the poisonous gas in the well. Diffusion of dust.

A mixed lap joint type ingate system of an aluminum alloy die-casting gearbox shell is characterized in that the mixed lap joint type ingate system is formed by sequentially connecting a shell cavity, an ingate, a transverse pouring gate and a straight pouring gate, and the outflow end of the ingate is arranged on the lower left portion, the lower middle portion and the lower right portion of the shell cavity in sequence; molten aluminum liquid enters a shell cavity at different jet flow angles through the ingate outflow end, and the cross section area of the cross gate outflow end is larger than the total cross section area of the ingate outflow end and tends to be gradually reduced. According to the invention, molten aluminum can stably and sequentially pass through the sprue, the cross gate and the ingate, enters the shell cavity and then is stably filled, so that the local resistance coefficient and pressure loss of the molten aluminum in the runner and the shell cavity are reduced, and the front impact of the molten aluminum on the inner side of the shell cavity is greatly relieved; the generation of eddy current and turbulent flow areas and the generation of defects such as air holes and loose structures are avoided, and the compactness and the yield of the shell structure are effectively improved.

The invention discloses a seawall flood season protection structure and a construction method thereof. The seawall flood season protection structure comprises a wave dissipating device, a wave power generation device, a dam and a buffer system. The wave dissipating device is movably connected to a first supporting structure. The first supporting structure comprises two parallel first supports. The two ends of the first supporting structure are fixedly connected to a speed reducing slope and a current stabilization slope through a foundation pile and a first positioning pile correspondingly. The wave power generation device is arranged at the tail end of the first supporting structure. A second supporting structure is arranged at the other end of the first positioning pile. The buffer system penetrates through the speed reducing slope, the current stabilization slope and the dam. The method includes the steps of surveying and setting out, construction of the foundation pile and the positioning pile, construction of the buffer system, construction of the wave dissipating device and the wave power generation device, construction of the second supporting structure and construction of the dam. By means of the seawall flood season protection structure and the construction method thereof, flood season installation protection of seawalls with different lengths and widths can be met, sediment loss is reduced, a good seawall protection effect is achieved, seawater power generation can be achieved, and economical benefits are remarkable.

The invention relates to a back-swept disc turbine impeller, which comprises a disc, blades and a stirring shaft; the blades are arranged along the circumference of the disc; the The blade is divided into an upper part and a lower part with the horizontal plane where the disc is located; the radial extension line of the blade at the junction of the upper part and the lower part is a curved structure; the curved structure includes an arc, a parabola or an elliptical arc ; The liquid-facing surface of the paddle forms a depression inward, and is swept back along the radial extension line of the paddle. The swept-back disc turbine stirring paddle provided by the invention can reduce stirring power consumption, improve gas-liquid mass transfer performance, and enhance gas-liquid mixing effect, and is widely used in the fields of chemical industry, metallurgy, pharmacy, water treatment and the like.

The invention is an explosion-proof angle seat valve, comprising: a valve body, a muffler, a front cover, a piston rod, a piston, an exhaust pressure regulating joint, a rear cover, a cylinder barrel, a return spring, a guide groove, a limit plate, a spring one, A damping shaft sleeve, an elastic part and a plug; the valve body is also provided with a water discharge damping mechanism. Compared with the prior art, the present invention adopts the hemispherical plug and the dislocation arc-shaped groove to cooperate, and solves the technical problem that the water pressure fluctuates violently when the piston is used to close the pressure plate and the water flow opening is closed in the prior art, causing the valve body to vibrate violently. . At the same time, the water discharge damping mechanism is arranged in the groove, which further prevents the problem of excessive water pressure when the plug closes the groove; and the damping bushing is set between the piston rod and the plug, which can greatly reduce the blocking of water flow. head shock.

The invention relates to the technical field of die-casting molds, and provides a die-casting mold for producing shells and a production method for shells, including: a movable mold assembly, a fixed mold assembly, and a slider mechanism, a movable mold assembly, and a fixed mold assembly The product cavity is formed between the parts and the slider mechanism, and also includes: the runner assembly, the runner assembly has a feed sleeve and a splitter cone arranged on the movable mold assembly, the upper surface of the splitter cone and the lower surface of the fixed mold assembly A feed channel connected with the product cavity is formed between the surfaces, the feed sleeve is connected with the feed channel, the thickness of the feed channel is gradually smaller from the splitter cone to the product cavity, and the feed channel is connected with The junction of the product cavity is in a straight line. Compared with the prior art, the present invention has the advantage that the connection between the feed channel and the product cavity is arranged in a straight line, thereby increasing the feeding speed of the shell and the speed at which the gas is discharged from the product cavity, and preventing the setting on the shell Die-casting defects such as lack of material, air holes, and fluffy structure appear in multiple positioning columns.

The invention belongs to optical cable cabling trough devices for communication network Fiber To The Home (FTTH) optical fiber comprehensive wiring. A ground cabling trough for bow-type optical cables comprises a trough body. Bow-type optical cable troughs are arranged in the trough body, the upper surface of the trough body is in a shape of a circular arc, protruding portions which are in a direction of the center of the circular arc are disposed in the trough body, and the height of the protruding portions are parallel and level to lower bottom surface of the cabling trough. The ground cabling trough coordinates with an inside corner of the cabling trough, the bow-type optical cables are led from a wall surface to a ground surface, the surface is designed in the arc structure, four bow-type optical cable troughs are arranged, the protruding portions are used for improving the strength and rigidity of the cabling trough, a cambered surface is combined with the ground surface, kicking and bumping of the ground cabling trough are avoided when users pass through, and the cabling trough can not be damaged and deformed when treaded, therefore the bow-type optical cables are effectively protected to smoothly pass through the ground surface under the condition of open wire distributing, a plurality of cabling troughs can be connected to the cabling trough through cabling trough joints, and the distance is not limited.

A rotating brush type blueberry harvester mainly comprises an outer framework, an inner framework, a tree height follow-up regulator, a crown diameter follow-up regulator, a hydraulic motor, a rotating brush assembly, a crown guider, a fruit conveyer, and a fruit collector box; in usage, blueberry plants enter the center of the rotating brush assembly through the crown guider; the hydraulic motor drives a rotating brush mandrel to rotate; elastic brush teeth on the rotating brush mandrel brush the blueberry plants, so the mature blueberry fruit can fall on a conveyer belt of the fruit conveyer, and sent to the fruit connector box, thus realizing fruit contentious and automatic harvesting; the harvester uses the brush mode to contentiously harvest the blueberry, is high in harvesting efficiency, and small in mechanical damage on the fruits; the work parameters of the tree height follow-up regulator and the crown diameter follow-up regulator can be adjusted, so the harvester can suit for blueberry plants of different heights and crown diameters of various kinds; the harvest can also harvest other small berries, and is wide in application scope.

The invention relates to a siphonic energy-saving blowing gun which comprises a handle, a wrench and a spray nozzle, wherein the upper end of the wrench is connected with the upper end of the handle, and rotates around the upper end of the handle, the spray nozzle is connected with the upper end of the handle on one side where the wrench is position, an air inlet joint is arranged at one end of the spray nozzle, an air outlet pipe is arranged at the other end of the spray nozzle, the internal diameter of the air inlet joint is smaller than that of the air outlet pipe, one end of the air inlet joint is communicated with the air outlet pipe through a central hole, transverse through holes are symmetrically formed in the center positions of the two sides of one side wall of the air outlet pipe, elliptical inclined holes are formed in the positions of the transverse through holes, the transverse through holes are formed in the centers of the elliptical inclined holes, the inclined angle between the long axis of each elliptical inclined hole and the central axis of the air outlet pipe is 15 degrees, and the bottoms of the elliptical inclined holes are communicated with the transverse through holes through inclined planes. The siphonic energy-saving blowing gun has a simple structure, pressurizes the compressed air by the siphon principle, is remarkable in effect, and is low in production cost.