53results about How to "Avoid Repeated Fragmentation" patented technology

The invention relates to a high-efficiency combined type domestic garbage crusher, which belongs to the technical field of domestic garbage crushing and comprises a feed hole, a crushing system, a discharge system and a transmission system, wherein the crushing system comprises dual knife rolls, a moving knife group, a static knife group and a knife adjusting device; the discharge system comprises a left screen, a right screen and two discharge holes; and the transmission system comprises a motor and a synchronous gear group, and the synchronous gear group ensures the synchronous running of the dual knife rolls. The left knife roll and the right knife roll are arranged side by side in parallel, a certain gap is reserved between the two knife rolls, and the two knife rolls are connected by the synchronous gear group and run in opposite directions; and the knife rolls are provided with rotating moving knives, the bottoms of the knife rolls are provided with bottom blocks, the bottom blocks are provided with bottom static knives, and simultaneously a frame is provided with a side static knife. Firstly, domestic garbage is crushed in the gap between the two knife rolls, is crushed at the position of the bottom knives after being compressed, then passes through the left screen and the right screen and is respectively discharged from the left discharge hole and the right discharge hole; and the side static knife can crush the garbage with bigger size again. The invention has the advantages of large treatment capacity, high crushing efficiency and low energy consumption.

The invention discloses a machine-made sand preparation system with a screening function, and relates to the technical field of machine-made sand preparation. The machine-made sand preparation system comprises a material storage box, feeding boxes are arranged at the top ends of the left and right sides of the material storage box, and the bottom side of the material storage box is fixedly connected with the top end of a first crushing box. According to the machine-made sand preparation system with the screening function, through the arrangement of the first crushing box and a second crushing box, large sand raw materials can be crushed in sequence, and the sand raw materials can be crushed into small particles to enter a screening barrel; and then through mutual cooperation of a supporting net plate, a first driving motor, a rotating shaft, a first screening net, a second screening net, a third screening net, a blocking ring, a discharging groove and an annular collecting box, crushed sand can be screened out in sequence, large sand blocks can be screened out and discharged through the annular collecting box to be separated from fine sand, and then the fine sand is screened out and discharged through a screening box, and repeated crushing of the sand is avoided.

The invention discloses a fluorine-containing silicon monoxide negative electrode material and a preparation method and application thereof. The mass content of fluorine in the fluorine-containing silicon monoxide material is 1-20%, and the fluorine elements are uniformly distributed on the surface of silicon monoxide; the average particle size of the fluorine-containing silicon monoxide materialis 10-70 [mu] m. The preparation method comprises the following steps: mixing and grinding silicon monoxide powder and ammonium fluoride powder to obtain silicon monoxide-ammonium fluoride composite powder; and sintering the silicon monoxide-ammonium fluoride composite powder under the protection of inert gas to obtain the fluorine-containing silicon monoxide negative electrode material. The negative electrode material obtained by the method can form a LiF fast ion conductor layer to coat the surfaces of silicon monoxide particles in the charging and discharging process, formation of a more stable SEI film is promoted, and the electrochemical performance of a battery is improved. The raw materials adopted by the invention are low in cost, the preparation process is simple, a toxic fluorine-containing additive or a fluorine-containing additive with harsh use condition requirements is not adopted, the safety is high, and the method is suitable for large-scale production.

The invention discloses a convenient-to-use traditional Chinese medicinal material crushing device for medicine processing, and belongs to the technical field of medicine processing. The device comprises a crushing box, a feeding hopper is arranged in the middle of the upper surface of the crushing box, a crushing mechanism is arranged at the bottom end of the crushing box, the crushing mechanismcomprises a driving motor, and a transmission square shaft is arranged at the output end of the driving motor. Crushing cutters are arranged at the two sides of the transmission square shaft, a screening disc is slidably connected to the bottom end of the transmission square shaft, a driving gear is fixedly connected to the bottom end of the transmission square shaft, transmission shafts are arranged at the two sides of the driving gear, and driven gears in meshed connection with the driving gear are arranged at one ends of the transmission shafts. The convenient-to-use traditional Chinese medicinal material crushing device is simple in structure and convenient to use, has a good crushing function, can prevent crushed medicinal materials from being repeatedly crushed, accordingly reduces the workload of the crushing device, can screen the crushed medicinal materials, and enables the sizes of the medicinal materials to be more uniform.

The invention discloses a drilling process of a large-diameter geological drilled hole and relates to the technical field of drilling processes. A multi-segment connecting type combined drill rod is adopted as a drill rod. A torque transmission drill rod is mounted at the bottommost end of the combined drill rod. A small drill bit is mounted at the bottom of the torque transmission drill rod, wherein the small drill bit is used for drilling a core. A large drill bit is mounted on the lower portion of the torque transmission drill rod in a sleeving manner, wherein the large drill bit is used for drilling or coring. The large drill bit is connected with the torque transmission drill rod through a torque transmission mechanism. After primary residue collection or coring is completed through the large drill bit, the combined drill rod is reserved in the hole all the time, and the large drill bit is only lifted out of the hole. After residue is unloaded or a rock core is picked out, the large drill bit is dropped to the bottom of the hole along the combined drill rod once again. Synchronous rotation of the combined drill rod and the large drill bit is achieved through the torque transmission mechanism, and secondary drilling is conducted. By means of the drilling process, the drilling efficiency is greatly improved.

The invention provides a closed-loop control crushing system and a closed-loop control method for sintered fuel. The closed-loop control crushing system comprises a double-layer vibrating screen arranged below a fuel bin, wherein the hole diameter of an upper-layer screen plate of the double-layer vibrating screen is greater than that a lower-layer screen plate of the double-layer vibrating screen; and a screen upper-layer discharging outlet of the double-layer vibrating screen is connected with a double-roller crusher, a discharging outlet of the double-roller crusher and a middle-layer discharging outlet of the double-layer vibrating screen are connected with a four-roller crusher through a first belt conveyor, a discharging outlet of the four-roller crusher is connected with a single-layer vibrating screen, a screen lower-layer discharging outlet of the double-layer vibrating screen and a screen lower-layer discharging outlet of the single-layer vibrating screen are connected with auser end through a second belt conveyor, and a screen upper-layer discharging outlet of the single-layer vibrating screen is connected with the four-roller crusher through the first belt conveyor toform a closed-loop system. According to the closed-loop control crushing system and the closed-loop control method for the sintered fuel, the crushing efficiency can be improved, the fuel treatment capability is improved, and a fuel particle size control technology is effectively achieved in a closed loop mode.

The invention discloses a gypsum powder preparation process and system. The system comprises a conveying device, a jaw crusher, a hammer crusher, a feeding device, a rotary kiln calcining pot and a centrifugal pulverizer which are arranged in sequence, wherein the conveying device comprises a primary conveyer belt, a secondary conveyer belt and a third conveyer belt; discharge baffle plates are correspondingly mounted on the primary conveyer belt, the second conveyer belt and the third conveyer belt; a primary collecting plate which communicates with the jaw crusher, a secondary collecting plate which communicates with the hammer crusher and a third collecting plate which communicates with the feeding device are additionally arranged on a rack; a waste heat channel is formed between the feeding device and the rotary kiln calcining pot; and the centrifugal pulverizer is connected with a storage tank. As ores are graded in a conveying process, energy consumption for continuously crushingthe ores can be reduced, and the ore crushing efficiency can be improved; and in addition, due to adoption of the waste heat channel and a novel centrifugal pulverizing component, the product qualitycan be further improved, and the energy consumption cost for production can be lowered.

The invention discloses a crushing device for sweet potato starch processing, and belongs to the technical field of agricultural products processing. The crushing device comprises a box body, a support base plate is arranged below the box body, the two ends of the box body are provided with hydraulic cylinders, second limiting plates are arranged at the bottom ends of the hydraulic cylinders, theconnection between the second limiting plates and the support base plate is provided with a shock-absorbing spring, a crushing mechanism is arranged in the box body, the crushing mechanism comprises adrive motor, an output end of the drive motor is provided with a drive shaft, one end of the drive shaft is provided with a drive disc, one side of the drive disc is provided with a drive part, one end of the drive disc is provided with a drive cylinder corresponding to the drive part, a limiting screw rod is arranged above the drive shaft, and a driven gear is arranged at one end of the limitingscrew rod; and the crushing device has a simple structure, convenient use, better crushing function, can crush starch blocks quickly, saves time and effort, and improves the production efficiency ofusers.

The invention discloses a method for reducing the fine powder rate of titanium residue breaking, and belongs to the field of titanium residue breaking treatment. The method comprises three steps of primary breaking sieving, jaw brushing sieving and ball milling sieving, wherein finished titanium residue and small-block titanium residue are obtained by the primary breaking sieving, the small-blocktitanium residue is broken into finished titanium residue and large-particle titanium residue by the jaw brushing sieving, and finally the large-particle titanium residue is subjected to grinding sieving by a double-layer sieve mesh type ball mill to obtain more than 95% of the finished titanium residue. According to the present invention, through the comprehensive utilization of the multi-stage fine-breaking sieving and the double-layer sieve mesh type ball mill, the repeated breaking of the fine-particle titanium residue is avoided, the 200 mesh titanium residue content is effectively reduced, the requirements of the subsequent processing on the particle size of the titanium residue are met, the yield of the titanium residue is improved, and the waste of resources is reduced.

The invention relates to a vertical shaft type impact crusher with a powder and dust removal function. The vertical shaft type impact crusher with the powder and dust removal function is characterizedin that upper air suction pipes are arranged, directly communicate with the positive-pressure air space on the periphery of a rotor and do not directly communicate with other normal-pressure and negative-pressure air spaces, and the upper air suction pipes and other normal-pressure and negative-pressure air spaces are in an indirect communication relationship only through rotor channels; and theupper air suction pipes communicate with an air exhaust pipeline of a powder and dust removal system, and an exhaust fan of the powder and dust removal system sucks the positive-pressure powder air onthe periphery of the rotor through the air exhaust pipeline and the upper air suction pipes. By the adoption of the vertical shaft type impact crusher with the powder and dust removal function, mutual interference of the air flow is avoided, the phenomenon that powder and dust is circularly and repeatedly crushed in the machine is avoided, the amount of powder and dust is reduced, the negative pressure is formed in an inlet and an outlet of the machine, and no powder air overflows.

The invention discloses a high-voltage electric pulse crushing pre-weakening and enriching process for metal ores. The process comprises the steps that firstly, raw ore is pretreated through a high-voltage electric pulse crushing device, and the ore subjected to high-voltage electric pulse crushing is divided into three treatment modes according to needs; for the metal ores with high ore hardness,the crushed materials directly enter a mechanical ore grinding device to be crushed and ground; for the metal ores with concentrated useful mineral distribution, the crushed materials enter a particle size grading device to be divided into tailings and rich ores, tailings are discharged in advance, and rich ores enter the mechanical ore grinding device to be crushed and ground; and for the metalores with uniformly distributed useful minerals, the crushed materials enter a gravity separation device to separate materials into tailings and rich ores, tailings are discharged in advance, and richores enter the mechanical ore grinding device to be crushed and ground. According to the process, the advantages of pre-weakening and pre-enrichment of high-voltage electric pulse crushing are utilized at the same time, so that the hardness of ores entering the mechanical ore grinding device is reduced, meanwhile, the mechanical ore grinding feeding amount is reduced, the ore crushing efficiencyis greatly improved, and the separation energy consumption is reduced; and the device is stable and reliable in operation, good in crushing effect, low in energy consumption, simple in process and wide in practicability.

The invention discloses a strong karst area cast-in-place pile construction method based on a rotary drilling hole forming manner. The cast-in-place pile construction method is characterized by comprising the steps of: (1) drilling into the surfaces of a karst layer and a gravel soil layer by adopting a conventional bit; (2) in combination with the basic theory of rock-soil mechanics, finding out a mathematic relation between an optimized value of inclination of a multi-stage alloy pilot roller bit and a coefficient of sliding friction between a rock-soil material and the interface of the bit; (3) after adopting the conventional bit to dill into the surfaces of the karst layer and the gravel soil layer, changing the conventional bit into the multi-stage alloy pilot roller bit, firstly drilling at high pressure and low speed, and then, after the bit is dilled into the rock for more than 50 cm, drilling at low pressure and high speed until the drilling depth or hole depth satisfies design requirements; (4) optimizing the design of mud specific weight in stages for preventing pile holes from collapsing and improving the bearing capacity of pile foundations; and (5) handling sudden accidents, such as fracture of drilling rods, bit falling, bit burying, fracture of cone palms in holes, accidental falling of cone palms and other small operation tools and the like, in the drilling process by adopting a drill tool overshot and a falling object salvage skip.

The invention relates to an efficient and durable impact crusher. The efficient and durable impact crusher comprises a box, wherein impact frames are arranged in the box; the impact frames comprise arc-shaped cover plates; impact wheels are arranged in the arc-shaped cover plates; the impact wheels are arranged in the arc-shaped cover plates; the back sides of the arc-shaped cover plates are provided with first lug handles; the upper ends of the arc-shaped cover plates are hinged to the first lug handles; the back sides of the arc-shaped cover plates are provided with second lug handles; the second lug handles are hinged with mounting sleeves; lead screws are arranged on the box in an inserting manner corresponding to the mounting sleeves; the lead screws are arranged in the mounting sleeves; a crusher rotor is arranged in the box; the crusher rotor comprises a rotor barrel; the rotor barrel is provided with sinking grooves; plate hammers are arranged in the sinking grooves; the rotorbarrel on both sides of the plate hammers is provided with pressing plates; the plate hammers are fixed on the rotor barrel through the pressing plates; the left side and the right side of the rotor barrel are provided with connection plates; the outer sides of the connection plates are provided with rotating shafts; the rotating shafts are arranged on a front panel and a back panel of the box through bearings. By adopting the efficient and durable impact crusher, the crushing efficiency is improved.

The invention discloses an impact crusher. The impact crusher comprises a lower shell, a rack, a transmission device, a rotor, an upper shell, an impact plate, an adjusting device and the like, wherein a pre-screening channel is formed in the lower shell, a pre-screening device is arranged at a feeding port formed by the upper shell and the lower shell and used for pre-screening materials at the feeding port, fine materials subjected to pre-screening enter the pre-screening channel and then are output through a discharging port. After the materials are sorted by the pre-screening device, fine materials enter the pre-screening channel and then are discharged out of the crusher, unqualified coarse materials fall into the rotor working area, the transmission device drives the rotor to rotate to hit the materials onto the impact plate to be subjected to impact crushing, and therefore the materials with qualified particle sizes are obtained. The particle size difference rate of output materials is reduced, the fine powder amount of finished product granules is reduced, the uniformity rate of the materials with the finished product particle size is improved, the beating frequency is reduced, and the efficiency is improved.

The invention discloses a PDC drill bit capable of achieving fast drilling in soft and hard interbedded rock. The PDC drill bit comprises a drill bit body and a connector rigid body and is characterized in that three outer blades are evenly arranged on the outer periphery of the drill bit body, two central blades are arranged in the middle of the drill bit body, a cylindrical PDC is arranged on the upper portion of one side of each outer blade, a cylindrical PDC is arranged on the upper portion of one side of each central blade, the negative rake of each cylindrical PDC is 13-18 degrees, the bypass angle of each cylindrical PDC is 3-5 degrees, and the exposure height of each cylindrical PDC is 10.9-11.2mm. The PDC drill bit has the advantages that by designing the three high outer blades and the two low central blades, mounting the cylindrical PDC on each blade and optimally designing the negative rake, the bypass angle and the exposure height of each cylindrical PDC, the tooth breakage problem of the drill bit during cutting can be prevented, rock powder after cutting can be fast discharged out of the drill bit body, optimal drilling rate and optimal chip removing rate are achieved, the overall drilling speed of the PDC drill bit is increased evidently, and the service life of the drill bit is prolonged.

The invention relates to the technical field of underground power tools, particularly to a hydraulic drive percussion primary-secondary drilling bit. The hydraulic drive percussion primary-secondary drilling bit comprises a drilling bit body and teeth which are arranged on the end face of the drilling bit body; the end face of the drilling bit body is in a ladder separation type; an orthographic projection is in a three-plate fan blade type; the end face comprises the end face of a central circle which is in an integral structure and fan-blade-shaped three end faces; the fan-blade-shaped three end faces are uniformly distributed on an external ring of the end face of the central circle; an arc-shaped chip removal groove is formed in the root portion of every fan-blade-shaped end face; the three arc-shaped chip removal grooves are closely attached to the external ring of the end face of the central ring; three bidirectional arc chip removal grooves which are in mutual non-intersection are uniformly formed inside the end face of the central circle; the three bidirectional arc chip removal grooves are corresponding to the three arc-shaped chip removal grooves one to one; and arc-shaped openings of the bidirectional arc chip removal grooves are opposite to arc-shaped openings of the arc chip removal grooves. The hydraulic drive percussion primary-secondary drilling bit has the advantages of enabling rock debris to be convenient to enter into flow channels, enabling repeat crush to be avoided, reducing rate of the rock debris returning to the bottom of a well, preventing fall off of edge teeth and improving rock cleaning efficiency and service life.

The invention discloses a plasma pulse rock breaking pile machine, and relates to the technical field of pile foundation construction. The plasma pulse rock breaking pile machine comprises a pulse discharging mechanism, a circulating mechanism and a drill bit connected with the pulse discharging mechanism, wherein the pulse discharging mechanism outputs high-voltage pulses to the drill bit to enable the drill bit to generate high-voltage arcs, and the circulating mechanism is used for conveying electrolyte to the drill bit and pumping mud generated by drilling out of a pile foundation. The plasma pulse rock breaking pile machine is based on a plasma rock breaking technology, rock breaking is achieved through arc energy through cooperation of the pulse discharging mechanism and the drill bit, and compared with mechanical rock breaking in the prior art, the plasma pulse rock breaking pile machine is simple in structure, capable of achieving the purpose of rapid pile driving and hole forming, and has the advantages of being small in mechanical abrasion, high in working efficiency, and adaptive to rock strata with different hardness.