2155results about How to "Easy to replace and maintain" patented technology

The invention discloses a steel joint precast and assembled reinforced concrete frame structure, which comprises precast beam members, precast column members and joints, wherein each of the nodes comprises a steel plate box in which annular horizontal reinforced rib plates and vertical reinforced rib plates are arranged; the upper and lower surfaces of the steel plate box are respectively provided with an upper force bearing plate and a lower force bearing plate; the outer surface of the steel plate box is provided with rib plates which are respectively connected with the upper and lower force bearing plates; the rib plates are connected with vertical force bearing plates which are respectively connected with the upper and lower force bearing plates; each precast beam member comprises a precast reinforced concrete beam; a beam-end precast steel plate is precast on the end part of the precast reinforced concrete beam, and is connected with a shaped steel beam which is connected with a beam-end force bearing plate; each precast column member comprises a precast reinforced concrete column; a steel plate enclosure box is arranged on the lateral surface of the end part of the precast reinforced concrete column; studs are arranged on the inner lateral surface of the closure box; the end part of the steel plate closure box is provided with a column-end steel force bearing plate; the upper and lower force bearing plates of each joint are respectively with the adjacent columns; and the vertical force bearing plates are connected with adjacent beams.

The invention discloses a lithium-ion battery with high rate discharge performance. The lithium-ion battery comprises a cover, a battery core in the cover, an upper cover plate, and a lower cover plate, wherein the battery core is prepared either by winding or laminating a positive pole piece with a positive pole ear, a negative pole piece with a negative pole ear and a diaphragm. The lithium-ion battery is characterized in that a positive pole piece clamping mechanism and a negative pole piece clamping mechanism are also arranged; the positive pole ear is packed and fixed inside of the positive pole piece clamping mechanism and a positive pole stud is arranged on the outside of the positive pole piece clamping mechanism and is in detachable connection with the upper cover plate; the negative pole ear is packed and fixed inside of the negative pole piece clamping mechanism and a negative pole stud is arranged on the outside of the negative pole piece clamping mechanism and is in detachable connection with the lower cover plate. The lithium-ion battery is particularly applicable to the fields of electrical motorcycles, electrical taxies and electrical buses, and the like, and can meet the requirements for high rate discharge performance of batteries when the vehicles are in the bad circumstances such as climbing, instantaneous starting and instantaneous accelerating.

This invention relates to a distributor for automatically distributing serial bus equipment address and its control method. The distributor includes a serial communication bus, an address identifying line-connecting equipments on the serial bus orderly. Advantage: the device addresses on the serial bus are automatically assigned, it's not necessary to design address for installation of devices, every time when the device is turned on, the address on the device of serial bus is automatically distributed. An intelligent controller controls the address distribution of the communication device.

The utility model discloses a parameter correction system and method of LED matrix screen, comprising a main controller and a plurality of LED driving units, which is characterized in that the LED driving unit comprises a storage circuit, a storage control circuit and a LED driving circuit, wherein the storage circuit storages the point correction parameter of the LED matrix of the current-level LED driving unit. When the parameter correction system of the LED matrix screen reads the correction parameters, the main controller controls the LED driving unit and a communication channel is established between the main controller and the LED driving unit, the point correction parameters stored in the storage circuit of the LED driving unit are read to the main controller by the main controller and the storage control circuit of respective-level LED driving unit through the communication channel, the main controller finishes the operation and contrast of the point correction parameters, and transfers the actual display values to the LED driving circuit of the LED driving unit.

The invention discloses a sieving and crushing integrated machine. The sieving and crushing integrated machine comprises a machine housing, a sieving and distributing machine (1) arranged at an upper part of the machine housing, and a sieving and crushing machine (35) arranged at a lower part of the machine housing, wherein the sieving and distributing machine (1) comprises a charge hole (2), an arc-shaped distributing plate (6), an iron remover (11), a transmission device, a flange type sieve shaft (4) and a filter sieve shaft (5); the sieving and crushing machine (35) comprises a main rotor, an arc-shaped counterattack sieve roller set, a particle size adjusting device and a transmission device; and a charge hole (36) of the sieving and crushing machine is positioned below a discharge hole (9) of the sieving and distributing machine. The sieving and crushing integrated machine has the following creative effects: the original two-stage crushing and one-stage sieving mode is changed to be a one-stage sieving and one-stage crushing mode, so that a system structure is simplified; problems of material adhesion and blockage, high iron content, low sieving and crushing efficiency, high power consumption, non-uniform ring hammer wear, unadjustable particle size, high difficulty in overhauling and replacement of spare parts, inconvenience in operation and the like are solved; and the sieving and crushing integrated machine is a major innovation of sieving and crushing equipment technology.

The invention belongs to the technical field of agriculture product processing, and particularly relates to a flat plate type vacuum pulsation drying machine. The flat plate type vacuum pulsation drying machine comprises a machine body, a control unit, a material drying unit and a pulsation vacuum unit, wherein the material drying unit is provided with multiple layers of material shelves. According to the flat plate type vacuum pulsation drying machine disclosed by the invention, a heating part adopts special electric heating plates, so that the processing is simple and convenient, the cost is low, the heating temperature is uniform, and the manufacturing cost, the using cost and the maintaining cost of the drying machine are greatly reduced; through a hierarchical control mode, corresponding heating plates can be opened according to actual processing amount, so that the energy consumption is reduced; meanwhile, soft material trays are adopted, so that the contact conditions between the material trays and the heating plates are remarkably improved, the quality of dried products can be effectively ensured, and the problem that the soft material trays are inconvenient to move is overcome by using a dedicated material tray shovel to assemble and disassemble the material trays; in addition, the flat plate type vacuum pulsation drying machine belongs to static drying, the breakage of materials cannot be caused; the processing and loading capacity of equipment can be effectively increased by virtue of a multi-layer structure.

The invention provides a vertical shaft restoration and reinforcement structure and a restoration and reinforcement construction method. The vertical shaft restoration and reinforcement construction method comprises the steps that firstly, surrounding rock in a fractured and water-seepage area inside a vertical shaft is reinforced through anchor rod drilling grouting, and water stopping is conducted on to-be-restored parts; secondly, a plurality of drainage holes are drilled in water-seepage parts, water in the water-seepage parts is introduced into a soil layer under the bottom of the vertical shaft through a drainage system, an annular foundation is constructed on shaft wall surrounding rock meeting the third-level rock mass standard or a complete shaft wall under the to-be-restored parts of the vertical shaft, and a steel plate drum is mounted on the annular foundation; and thirdly, concrete is poured between the steel plate drum and the shaft wall in a filled mode through a vertical concrete conveying pipe to fix the steel plate drum to the inner wall of the vertical shaft. The vertical shaft restoration and reinforcement structure is simple, short in construction period, small in influence on a production line, convenient to construct, replace and repair and suitable for the conditions of vertical shaft blocking and shaft wall collapse.

The invention discloses a core machine which comprises a frame, a worktable, a worktable lifting mechanism, a lower core ejection mechanism, a lower core box moving mechanism, an upper core box lifting mechanism, a sand ejection unit and a movable air blowing cover mechanism. The core machine is characterized in that the lower core ejection mechanism is positioned in front of the worktable and is fixedly connected with the frame; the worktable lifting mechanism is of a four-guide rod structure, and lifting hydraulic cylinders are respectively arranged on two sides of the worktable; the lower core box moving mechanism comprises a driving hydraulic cylinder arranged on the worktable, a cored trolley and guide rails; the guide rails comprise a first guide rail positioned on the worktable and a second guide rail positioned on the lower core ejection mechanism; the first guide rail and the second guide rail are aligned with each other. The core machine is convenient in daily maintenance, the lower core ejection mechanism is fixed on the front side of the equipment and is not lifted along with the worktable, and the core box lifting and core taking are convenient.

The invention relates to the technical field of automobiles, and discloses an electric automobile power battery frame lifting device and a lifting method. A lifting frame is included. The lower end ofthe lifting frame is connected with a lifting mechanism. The inner wall of the bottom of the lifting frame is fixedly connected with a battery frame through a damping mechanism. A battery body is arranged in the battery frame. Two fixing plates are symmetrically and fixedly connected to the outer wall of the upper end of the battery body, and the outer wall of the battery frame is fixedly connected with fixing blocks corresponding to the fixing plates. The fixing plates and the fixing blocks are connected through limiting mechanisms. The electric automobile power battery frame lifting devicehas the advantages that the relative height of the battery frame can be rapidly and conveniently adjusted, battery replacement is convenient, and heightening of an automobile chassis cannot be caused.

The invention discloses a method for monitoring automatically cable force of cable-stayed bridge, which comprises the following steps: (1) determining a reasonable position on cable-stayed bridge for fixing cable force monitoring device by computing and analyzing bridge inner force and combining simultaneously maintenance and convenience for maintaining; (2) pasting stress sensor on the corresponding position of cable, so as to realize monitor of cable force; (3) opening a hole at cable casing having a corresponding force measurement device, leading out a wire for connecting with the display instrument fixed on the casing, thereby realizing automatic display of cable force, or performing statistic and analysis by computer. An automatic monitoring device is also provided. The cable force monitoring method is capable of real-time monitoring cable force, and replacing monitoring system simply.

The invention discloses a pedal durability tester and belongs to the field of vehicle accessories. The pedal durability tester comprises a biaxial double-action type cylinder, two pedals, a rod end joint bearing, a pedal support, an experimental tool and a pneumatic system; two panels are fixed on the experimental tool via the pedal support; the biaxial double-action type cylinder is fixed on the experimental tool; two rod ends of the biaxial double-action type cylinder are connected with the rod end joint bearing; and the pneumatic system is connected to the tester via the biaxial double-action type cylinder. The pedal durability tester has the beneficial effects of capability of carrying out the durability test of the two pedals, convenience for maintenance and change and easiness for the acquisition of a gas source and low manufacturing and maintaining costs; and the reciprocating movement velocity of the cylinder can be continuously adjusted from a low speed to a high speed by adjusting the air inflow of the cylinder so as to meet the requirements on the test speed of the pedal under different conditions.

The invention discloses a poly-lens profound hypothermia infrared detector pipe casing structure packaged in a Dewar. The poly-lens profound hypothermia infrared detector pipe casing structure is applicable to the packaging technology of a profound hypothermia pipe casing arranged in an infrared focal plane detector Dewar and provided with a plurality of cold optical elements. The poly-lens profound hypothermia infrared detector pipe casing structure comprises a detector chip, an electrode lead wire circuit substrate, a plurality of lenses, an optical filter, a supporting pipe casing, a press ring type cold shield, a chip, a lead wire silicon-aluminum wire and the like. The poly-lens profound hypothermia infrared detector pipe casing structure achieves poly-lens profound hypothermia pipe casing high-accuracy packaging through special measures and structural modes such as laser positioning drilling, the nested press ring type cold shield, the special alloy integrated supporting pipe casing and lateral surface fine tuning aligning, can effectively meet hypothermia infrared optical accuracy requirements, reduce the background in a chip view field, stray light and heat radiation of the whole Dewar and effectively remove low temperature deformation stress of the ceramic sintered pipe casing on the detector chip, and is applicable to other radiation cooling, thermoelectric refrigerating and the like.

The invention discloses a pressing module for testing drawing force of a keycap and a test machine for the drawing force of the keycap. The pressing module comprises a pressing board, a pressing board cylinder, and a pressing board driver, which are connected in sequence from bottom to top, wherein the pressing board is used for pressing a keyboard; the pressing board cylinder is used for driving the pressing board to move up and down in a vertical direction; and the pressing board driver is used for driving the pressing board cylinder and the pressing board together to move in a Y-axial direction in a keyboard plane. The test machine for the drawing force of the keycap comprises: a keyboard placing device for placing and inputting a to-be-measured keyboard; a pressing module for testing drawing force of the keycap for pressing the keyboard, a drawing force measuring head module for measuring the drawing force of the pressed keycap in the keyboard; a telescoping module for hanging the measuring head module and performing interval adjustment; a substrate for fixing the telescoping module; and a driving device for driving the substrate to move along the X-axial, Y-axial, and Z-axial directions. The test machine is high in detection rate, low in misjudgement rate, good in versatility, and low in detection cost, and doesn't generate damage to a good keycap.

The invention relates to a plate type ultrafiltration membrane locking assembly which comprises a first membrane, a second membrane, a membrane element formed by a screen mesh clamped between the first membrane and the second membrane and lock plates with annular bodies, wherein the membrane element is sleeved to the peripheral surface of each fan-shaped boss on the front face of a lock plate through a punched hole of the membrane element, and another lock plate with the same structure is abut jointed with the lock plate sleeved with the membrane element by the back face; meanwhile, an insert block and a convex post of one lock plate are respectively inserted into an insert block catching groove and a convex post insert hole of another lock plate to be mutually locked; and the lock plates are sequentially connected to form the plate type ultrafiltration membrane locking assembly. The plate type ultrafiltration membrane locking assembly is formed by overlapping two or more lock plates with the same structure, and the lock plates can be arbitrarily and continuously superposed; the lock plates are convenient and quick to assemble and disassemble, the membrane element is convenient to replace and maintain; the interlocking performance is good, and the sealing performance is reliable and stable; and the surface of the membrane is smooth and easy to clean, thus the filtering efficiency and the service life of plate type ultrafilters are effectively improved.

The invention provides a waterproof construction method characterized by a heat pipeline sleeved in a steel sleeve pre-buried in an external wall and a waterproof system structure. The waterproof construction method includes steps as follows: the steel sleeve is pre-buried in the wall; a heat insulation pipeline is sleeved in the steel sleeve and fixed; the clearance between the steel sleeve and the heat insulation pipeline is filled with a functional material; the functional material at least includes a set of water swellable rubber strip layers; baffles are arranged on the outer sides at both ends of the steel sleeve; the outer sides of the baffles are waterproof, and raiser blocks used for supporting are arranged and tightly clung to the baffles; a waterproof coiled material is laid inan intersection area of the external wall body and the heat insulation pipeline, and wrinkles are formed at the corner of the waterproof coiled material, so that the waterproof coiled material and the outer wall of a direct-buried heat insulation pipeline can be combined and wound tightly; the waterproof coiled material is externally provided with a protection layer; a local reinforcement protection facility is arranged on the outer side at the wrinkle part at the corner of the waterproof coiled material; and the backfilling is performed. The structure is an integral system structure established upon the method. The construction method is simple and short in period, and lowers the investment; the daily maintenance is convenient, the waterproof effect is excellent, the service life is long, and the operation management cost is low; and further, the requirement for the operation of a heat pipeline network can be satisfied.

The invention relates to an unmanned aerial vehicle monitoring system and a monitoring method thereof. The unmanned aerial vehicle monitoring method comprises the following steps: step 1, acquiring animage in a scanning area; step 2, forming a three-dimensional vision to determine whether a suspicious object exists in the image or not through a first camera and a second camera; step 3, if yes, calculating the standard position of the suspicious target, and tracking and shooting the suspicious target. A plurality of servo holders are arranged in the area to be detected, the first camera and the second camera are arranged on the two side end faces of each servo holder, after the unmanned aerial vehicle is found, the unmanned aerial vehicle is tracked and monitored through binocular vision according to the position information, the finding, identifying and disposing of the low-altitude low-speed small targets can be realized, the unmanned aerial vehicle is detected through the two cameras, the concept that the unmanned aerial vehicle is detected by radar is changed, and the detection cost of the unmanned aerial vehicle is reduced.

The invention relates to an insulation and decoration integrated plate, an insulation and decoration system and a construction technology thereof, which are used for the insulation and decoration of building external walls. The insulation and decoration integrated plate includes a backing substrate, an insulation core layer and a decorative panel which are overlaid successively; wherein the backing substrate and the insulation plate as well as the insulation plate and the decorative panel are connected through an adhesive layer; facing of the decorative panel is provided with a fluorocarbon paint facing layer; the back surface of the backing substrate is connected to the building external walls through a plurality of bonding points formed by point frame coating adhesive mortar. The insulation and decoration system is composed of the insulation and decoration integrated plate, an anchoring part, a sealing foam strip and sealant and utilizes proper construction technology. Compared withthe prior art, the insulation and decoration integrated plate, the insulation and decoration system and the construction technology thereof have the advantages of sound insulation effect, convenient construction and high construction intensity, long longevity, good weather ability, strong function, excellent performance, good stability of products and stable and beautiful system.

The invention relates to a plate-and-frame filter press which comprises a support, two cross beams and a hydraulic compressing device arranged on the support, wherein a push plate, a stop plate and a plate-and-frame group are arranged between the two cross beams, one side of each plate frame is in a plane structure, another side of each plate frame is a frame convex, each plate frame has a concave structure inside, one side of each plate frame plane is provided with a plate frame extruding balance beam, a spring and a small hydraulic cylinder are arranged between each plate frame and each plate frame extruding balance beam, a hydraulic oil opening is arranged on a small hydraulic cylinder body, the hydraulic oil opening is connected with a hydraulic oil support pipe, and a hydraulic oil branch pipe on each plate frame is communicated with a hydraulic oil main pipe on each plate frame. The position except a material inlet on the surface at one side of each plate frame is provided with an automatic filter cloth cleaning device. The plate-and-frame filter press is simple in structure, each plate frame can be synchronously pushed in the process of filter-press, the plate frames can be compacted with one another, the material can not be lost, the plate-and-frame filter press is high in filter-press efficiency, the workload of the hydraulic compressing device can be effectively reduced, each plate frame can not deform or be damaged, and the plate-and-frame filter press has a function for cleaning a filter cloth on line.

The invention discloses a molten titanium and titanium alloy crucible which is at least formed by combining a crucible shell and a crucible lining, wherein the crucible lining is of an opened structure capable of holding a melt and is made of a composite material; the crucible shell is made of a high-temperature-resistant material with a high melting point and is of a force bearing structure capable of bearing pressure generated by titanium melts and titanium alloy melts; the crucible lining is made of a sintered composite prepared by mixing the following main components: 45-70wt% of barium oxide, 30-50wt% of zirconium oxide and 0-5wt% of fluxing agent, wherein the fluxing agent is titanium oxide, aluminum oxide or boron oxide. The invention also discloses a preparation method of the crucible; the crucible lining is assembled in a way of stacking and combining sintered bricks and can be disassembled in a decomposition way. An inner layer material of the crucible disclosed by the invention does not react with titanium; in addition, the crucible is nonstick, capable of meeting the requirements of industrialization, large capacity, low cost, easiness for maintenance and long service life, reasonable in structure and mature in preparation process.

The invention discloses an adhesive pre-applying and label pre-cutting dry type labeling machine, and relates to the technical field of machinery. An adhesive pre-applying and label pre-cutting dry type labeling technique is adopted, and one side of a platform is fixed together with a chain channel; one side of the chain channel is fixed together with a screw; the platform is fixed together with a guide plate, a star wheel shaft A, a rotation disc shaft, a spraying device, a rotation drum shaft, a label absorption rotation disc shaft, a label storage supporting disc and a star wheel shaft B; the inner wall of the label storage supporting disc is connected with a label pressing plate in a sliding and moving mode; the star wheel shaft A and a star wheel A, the rotation disc shaft and a rotation disc, the rotation drum shaft and a rotation drum, the label absorption rotation disc shaft and a label absorption rotation disc, and the star wheel shaft B and a star wheel B are rotationally and movably connected via bearings; bottle supports are uniformly distributed on the rotation disc; label palms are fixed on the label absorption rotation disc in a uniformly distributing mode; the rear end of the label pressing plate is provided with a pneumatic device; a label paper carrier material is selected from one of paper, plastics and aluminum foils; polyving akohol adhesive is pre-applied to a label paper carrier, and the polyving akohol adhesive on a pre-applied label is in contact with water mist sprayed by the spraying device so as to generate he viscosity for preparing for labeling. The adhesive pre-applying and label pre-cutting dry type labeling machine is used for labeling for bottle type objects, is novel in concept, reasonable in structure, easy to manufacture, and low in cost.

The invention discloses a plugging photoelectric composite connector which comprises a plug and a socket; a pre-reserved photoelectric composite cable which is protruded outside is arranged in the left end of the plug; a plug center hole and a plurality of first openings are arranged in the right end of the plug; an optical inner insert core is arranged in the first opening; a first electric insert core is arranged in the plug center hole; a plurality of electrically connected jacks are arranged in the first electric insert core; a contact is arranged in each electrically connected jack; the optical fiber inner insert core and the contact are connected and coupled with the right end of the pre-reserved photoelectric composite cable; a socket center hole and a plurality of second openings are arranged on the left end of the socket; optical fiber outer insert cores are arranged in the second openings; the left end of each optical fiber outer insert core is inserted leftwards into the first opening which corresponds to the optical fiber outer insert core and is contacted with the optical fiber inner insert core in the first opening; a second electric insert core is arranged in the socket center hole; a plurality of contact pins are arranged on the second electric insert core; and the left end of each contact pin is inserted leftwards into the electrically connected jack which corresponds to the contact pin and is contacted with the contact in the electrically connected jack.

The invention discloses an intelligent comprehensive fire protection system for a public transport vehicle. The intelligent comprehensive fire protection system for the public transport vehicle comprises a public transport vehicle alarm linkage controller, an automatic fire detector, a manual startup switch, an automatic window breaker, a door opening controller, an automatic fire extinguishing device, a remote communication device and an acousto-optic alarm device; the intelligent comprehensive fire protection system is mounted inside the public transport vehicle and is in charge of monitoring a fire safety situation in the public transport vehicle; when the intelligent comprehensive fire protection system automatically detects or manually finds fire in the vehicle, the intelligent comprehensive fire protection system can automatically or manually start the automatic fire extinguishing device, the automatic window breaker, the door opening controller, the acousto-optic alarm device and the remote communication device which are mounted inside the vehicle through the public transport vehicle alarm linkage controller, so that the automatic fire extinguishing device can quickly extinguish the fire after the fire happens in the public transport vehicle, and the fact that doors and emergency escape window of the vehicle are unobstructed and can help people evacuation is ensured; the intelligent comprehensive fire protection system can send a distress signal to a command center through the remote communication device, so that the vehicle can be quickly and timely rescued.

The invention discloses an arrangement-type floating running water power generation device. The arrangement-type floating running water power generation device comprises a floating frame and water wheel sets, transmission assemblies and a power generation assembly which are installed on the floating frame; the water wheel sets are connected with the transmission assemblies through transmission parts installed on water wheel shafts, and the transmission assemblies are connected with the power generation assembly; the water wheel sets are formed by installing multiple water wheels on the floating frame in the counter-flow direction in parallel at intervals; each water wheel at least comprises one water wheel shaft and impeller blades installed on the water wheel shaft. According to the arrangement-type floating running water power generation device, due to the resultant output of the multiple sets of the water wheels, the outputting efficiency and the outputting capacity are guaranteed; the water wheels which are arranged at intervals are beneficial for water flow driving; due to the fact that the multi-buoy design is adopted, the replacement and the maintenance are convenient; landing support legs are used for preventing the device from falling into water bottom sludge when the water level is low, a windshield effectively protects the normal work of the water wheels, the equipment operation is safer, the usage cannot influence the ecological environment, and the occupied space is small; power is generated by utilizing directional natural water flow, the investment is low, the gain is quick, and the economic benefit and social benefit are significant.

The invention discloses an integrated fresh air fan which comprises a shell, wherein the shell is provided with an outdoor air inlet, an outdoor air outlet, an indoor air inlet and an indoor air outlet, the outdoor air inlet and the outdoor air outlet are provided with valves for controlling the on and off, the interior of the shell is further provided with a first fan, a second fan and a filter unit, outdoor air is sucked in by the first fan through the outdoor air inlet and is sent to the filter unit, and the output end of the filter unit is respectively connected to the indoor air outlet and the outdoor air outlet; indoor air is sucked in by the second fan through the indoor air inlet and is respectively sent to the indoor air outlet and the outdoor air outlet. According to the integrated fresh air fan, indoor and outdoor ventilation circulation and single indoor air circulation are realized by adopting the rotation of valve rotating plates; outdoor fresh air can be led in, and indoor air can also be purified; the integrated fresh air fan is simple in structure, light in weight, simple and convenient to install and operate, low in cost, high in efficiency, saved in space and convenient to maintain and replace.

The invention discloses a cold-fixed PDC (polycrystalline diamond compact) bit. PDCs with slots are in clearance fit with and fixed in tooth post holes by check rings or stop pins to form cutting teeth, so that the heat influence on the PDCs by the braze welding is avoided, and simple maintenance and replacement of onsite PDCs are realized; when rock is broken in a well, the counter force of the rock drives circumferential conversion working surfaces of the PDCs in the composite tooth posts to rotate, as a result, the defect of abrasion of fixed working surfaces of the PDC bit is overcome, cutting edges are kept sharp during the whole cutting processing, the application stratum scope of the PDC bit is also widened, at the same time, the heat damage on the PDCs during the manufacture process of the bit can be avoided, and the abrasion resistance and the thermal stability of the product are improved. The abrasion resistance of the cutting edges is 13.5 times of that of the standard cutting edge, the whole service life of the bit can be prolonged for 3 to 5 times, and the demand of continuous development in the drilling field is satisfied.

The invention provides a lithium battery pack. The lithium battery pack comprises a bolt, a left fixing plate, a right fixing plate and a serial-parallel battery module, wherein two ends of the bolt are respectively connected with a left fixing plate and a right fixing plate, the bolt penetrates the serial-parallel battery module, the left fixing plate and the right fixing plate are respectively connected with the left end and the right end of the serial-parallel battery module, the serial-parallel battery module comprises at least two serial-parallel battery module bodies and switching fixing plates, and every two adjacent serial-parallel battery module bodies are connected through one switching fixing plate and are serially connected through a serial-parallel current-collecting conducting plate to form the serial-parallel battery module. The lithium battery pack has the advantages that the replacement and maintenance of a single battery can be facilitated, the flexibility and feasibility of heat management are enhanced, an insulating fool-proof structural design capable of avoiding assembling safety risks is used, and a modular design capable of avoiding a direct-facing welding process and single-point failure risks is used.

The invention discloses a shaft box suspension swing type bogie for a rail wagon. The bogie comprises a wheel set, a shaft box, a side frame, a swing bolster, a side bearing and a foundation brake device, wherein a bearing saddle is arranged between the shaft box and the side frame; central suspension devices are arranged below two ends of the swing bolster; a fixed lever fulcrum seat is arranged on the swing bolster; a rubber spring is arranged between the side frame and the bearing saddle; a spring supporting plate is arranged below the central suspension devices at the two ends of the swing bolster in a connection mode; shaking seats are arranged below two ends of the spring supporting plate and are connected with the side frame through a shaking seat bearing; a falling prevention cylinder is arranged on an outer surface at the rear end of a bearing body of the shaking seat bearing; and a brake pull rod support is arranged on one side of a fulcrum seat body of the fixed lever fulcrum seat. The horizontal performance and the vertical performance of the bogie can be improved, speed increasing requirements of the rail wagon are met, and parts have high connection reliability.

The invention discloses a kind of porous membrane filtration component for treating water, specifically it discloses a kind of suspending porous hollow fiber membrane bundle for treating highly turbid waste water. The component includes some porous hollow fiber membrane yarns and casting heads arranged at both ends of respective yarns, wherein the connections between the said casting heads and membrane filtration module are flexible connections, at least one end of the flexible connection the cast header is connected with a hollow tube or cord, and the membrane bundle hangs on the said membrane filtration module, suspending freely. The invention provides a suspending porous hollow membrane bundle that can effectively remove contaminants adhered to the surface of the membrane yarns, makes its membrane yarns difficult to rupture, has a longer service life, and produces water with steady quality. It solves the technical problems in the present hollow fiber filtration component which includes membrane yarns that are entangled with each other and easily ruptured, thus leading to a lower quality of the product water.

The invention discloses a system and a method for improving biochemistry and deeply treating sewage by utilizing powdered activated carbon. The system comprises pretreatment equipment, a biochemical tank, a secondary sedimentation tank, a high-density sedimentation tank and a submerged ultra-filtration membrane separation subsystem; the sewage enters the biochemical tank after being treated by the pretreatment equipment and is then conveyed into the secondary sedimentation tank for separation, and an effluent enters the high-density sedimentation tank for sedimentation; one part of the sludge in the high-density sedimentation tank flows back to the high-density sedimentation tank, and the other part is discharged into a sludge concentration tank; the effluent in the high-density sedimentation tank is inputted into the submerged ultra-filtration membrane separation subsystem and is mixed with and separated from the activated carbon in the submerged ultra-filtration membrane separation subsystem; carbon slurry in the submerged ultra-filtration membrane separation subsystem circularly flows back, one part flows back into the biochemical tank, and the other part flows back into the submerged ultra-filtration membrane separation subsystem; part of effluent in the submerged ultra-filtration membrane separation subsystem meets the standard to be discharged or recycled, and the other part is conveyed into a clean water tank for backwashing of the submerged ultra-filtration membrane separation subsystem.

The invention relates to the technical field of mechanical equipment, in particular to milling cutter clamping equipment for mechanical manufacturing. The milling cutter clamping equipment comprises aclamping block, an air cylinder, a clamping shaft, a supporting frame and a milling cutter. The clamping shaft is fixedly connected to the center inside the top end of the supporting frame, a telescopic rod is fixedly connected to the top end of a first sliding rail, the outer side of the telescopic rod is sleeved with a first spring, a pressing block is fixedly connected to the top end of the telescopic rod, a clamping barrel is fixedly connected to the outer side of the sliding block, air cylinders are fixedly connected to the tops of the inner walls of the two sides of the supporting frame, driving blocks are fixedly connected to the tail ends of main shafts of the air cylinders, the clamping block is fixedly connected to the tail end of a second spring, a clamp block is fixedly connected to the inner side of the bottom end of the clamping block, a clamping groove is formed in the outer side of a fixing block, and the milling cutter is fixedly connected to the bottom end of the fixing block. The milling cutter clamping equipment is scientific and reasonable in structure, convenient to replace and maintain, capable of ensuring axial stability and fastening of a milling cutter shaft and worthy of being popularized, and has huge economic benefits and wide market demands.