167results about How to "Avoid cracking damage" patented technology

The invention discloses a support method of a weak expansion type surrounding rock laneway, comrprising the following steps: A. the laneway is excavated according to the sectional form, an arc pit is excavated on a bottom board of the laneway, and full face injection of a thick concrete leveling course is carried out; B. high-strength prestressed anchor and prestressed anchor cable are used for supporting the surrounding rock, an anchor rod and an anchor cable are constructed, a high-strength prestressed anchor rod uses a laevo rod body without longitudinal bar and is arranged in plum blossom shape; C. a foam cushion is laid, and the full face of the laneway is tightly stuck and paved with an initial ejection leveling course, and a gap is added and preserved in case of laneway deformation; D. a first layer of reinforcement mat is hung and tightly stuck to the foam cushion, a full face sealed type steel bar grid arching is constructed, the main bar inside the grid is bonded with the first layer of reinforcement mat, and the second layer of reinforcement mat is hung on the sealed type steel bar grid arching; E. the bottom board is constructed, a cast-in-place concrete gutter is constructed at the center part of a positive arching, and rubbles are paved at the both sides of the gutter. The method solves the problems of low intensity of surrounding rock laneway, water expansion and floor heave, thereby avoiding reclamation work of the laneway and having low cost.

The invention discloses a construction method of a wall putty of a plaster-free concrete structure. The construction method comprises the following steps: construction preparation, base course treatment, concave-convex line construction, a first full application of wall putty, flattening, a second full application of wall putty and flattening. The construction method has the advantages of less workload, short construction time, little resource consumption, no hollow drum and crack of the floated coat, no crack at the joint of the primary structure and the secondary structure.

The invention relates to a composite material core used for an enhanced cable, a preparation process and the enhanced cable. The composite material core comprises an inner core and an outer layer, wherein the inner core is composed of fiber and thermosetting resin; the outer layer comprises a fiber woven pipe and thermosetting resin which are composited to form the outer layer; and the fiber woven pipe of the outer layer is a network structure which is woven by interlacing a plurality of fiber bundles. The transversal strength of the composite material core is greatly improved by the interlaced network structure, the fatigue resistance of the composite material core is greatly improved, and the service life of the composite material core and a power transmission cable is prolonged; and the problem that the composite material core is broken when the composite material core is stranded, wound and extruded by a conductor in the manufacturing process of the cable is completely avoided. As the fiber woven pipe is adopted by the outer layer, the flexibility of the outer layer is greatly increased by the interlaced and woven structure, thereby meeting the requirement of manufacturing composite material core with major diameter.

The invention discloses a super large area planting roof structure and a construction method thereof. The construction method includes the following steps of (1) roof structure layer processing, (2) roof structure separate warehouse and additional layer construction, (3) composite waterproof layer construction, (4) insulating layer construction, (5) roof structure exhaust system construction, (6) slope asking layer construction, (7) ordinary coiled material waterproof layer construction, (8) root resistance puncturing separating root waterproof layer construction, (9) asphalt felt isolating layer construction, (10) rigidity protecting layer construction, (11) drainage ditch barricade construction, (12) water drainage and impounding layer construction, (13) drainage system construction, (14) filtering layer construction, (15) planting dielectric layer construction, and (16) vegetation layer construction. The great effects on the heat preservation, heat insulation, water proof and virescence of the super large area planting roof structure are achieved, the technology is simple, the operation is easy, the construction quality is great, and the economic benefits and the social benefits are huge.

The invention discloses coating slurry for enhancing prestress of a building ceramic. The coating slurry consists of aggregate and an adhesive in a weight ratio of 1 to 4, wherein the aggregate is a combination of oxides, hydroxides and oxygen containing salts of Si, Al, Mg, Ca and Zn; the aggregate comprises the following chemical components: 50-75% of SiO2, 10-30% of Al2O3, 0-20% of MgO, 0-25% of CaO and 0-10% of ZnO; the adhesive is one or a combination of CMC (Carboxy Methyl Cellulose Sodium), PVA (Polyvinyl Acetate), PVB (Polyvinyl Butyral) and sodium silicate. In addition, the inventionfurther discloses a preparation method and a building ceramic product of the coating slurry. The coating slurry disclosed by the invention is adopted to completely coat the surface of a building ceramic blank, by exerting prestress, the strain that the ceramic blank is stressed and broken is increased, so that the strength and the performance of the building ceramic product can be greatly improved. The preparation and the application of the coating slurry are simple in production, easy to control, low in cost and beneficial to popularization and application, and have very high practical valuesand application prospects.

The invention discloses a method for simultaneously detecting protein, RNA and exosome membrane protein in exosome, and belongs to the technical field of exosome detection. The method comprises the following steps: capturing exosome in a sample; detecting the corresponding membrane protein; preparing nano particles; fusing the nanoparticles with the exosome; photographing and imaging by a total internal reflection fluorescence microscope, and analyzing and processing data. Verification is carried out in the aspects of exosome characterization detection, cell supernatant exosome membrane protein and mRNA expression comparison experiments, human plasma exosome specificity detection, human plasma exosome membrane protein comparison experiments and detection of various human plasma exosome intracellular proteins, RNA and membrane proteins. Compared with an existing recognized exosome detection technology, a comparison experiment shows that the same marker detection result of the technologyfor simultaneously detecting the same sample is consistent with that of the recognized technology, and the technology can be used for simultaneously detecting protein, RNA and exosome membrane protein in the exosome and judging the sample difference.

The invention relates to a composite core used for a reinforced cable. The composite core comprises an inner core, a structural layer and an outer layer, wherein the inner core comprises fibers and thermosetting resins; the structural layer comprises a fiber sleeving and the thermosetting resins; the fiber sleeving is formed by braiding a plurality of fibers or spirally winding the fibers along the axial direction of the inner core; and the outer layer comprises fibers arranged along the length direction of the composite core and the thermosetting resins. The composite core provided by the invention has the following beneficial effects: the outer layer is added outside the structural layer and the continuous fibers arranged along the length direction of the composite core are added to theouter layer; and the added outer layer wholly covers the structural layer 2 and provides protection to the fiber sleeving in the structural layer 2, under the condition that the composite core is subjected to great tension, the stretch and extension rates of the outer layer 3 and the inner core 1 are basically the same and the extension quantities of the outer layer 3 and the inner core 1 are synchronous, and the structural layer is tightly squeezed by the inner core and the outer layer so that the structural layer in the middle is not easy to drop or separate, thus effectively overcoming thedefect that the composite core adopts the fiber sleeving structure.

The invention discloses a hooping housing charging-type flexible yield lining and constructing method for tunnel supporting. The method comprises multiple hooping housing charging bodies which are arranged in the circumferential direction of a tunnel, and yield hooping housing charging bodies are connected between the hooping housing charging bodies; after the hooping housing charging bodies are connected with the yield hooping housing charging bodies, pressure buffering layers are arranged between the outer circumferences of the hooping housing charging bodies and the surface of the wall rockof the tunnel; the hooping housing charging bodies comprise hooping housings, and the interiors of the hooping housings are fillers I; the yield hooping housing comprise corrugated hooping housings,and the interiors of the corrugated hooping housings are fillers II; prestress anchoring bolts vertically penetrates through the outer circumferences of the hooping housings and the inner ring surfaces; prestress is exerted by the prestress anchoring bolts so that longitudinal squeezing can be generated on the hooping housings and the internal fillers I, and therefore a composite bearing structureis cooperatively formed by the prestress anchoring bolts, the hooping housings and the fillers I. When the external wall rock pressure of the tunnel exceeds a certain value, the pressure buffering layers can generate squeezing deformation to allow the yield hooping housing fillers to be retracted inwards in the circumferential direction, and the flexible yield of the whole lining is achieved.

The invention relates to a connection structure of a prefabricated assembly column and a reinforced concrete foundation. The connection structure is characterized in that the bottom surface of the prefabricated assembly column is provided with a connection tenon, a foundation connection steel body, column side connection ribs and a column bottom reinforcement plate, the top part of the prefabricated assembly column is provided with built-in connection bolts, connecting steps, column inner connecting reinforcement bars and connecting anchor bars, and an interface grid layer is arranged on the outer surface of the prefabricated assembly column; the upper surface of the reinforced concrete foundation is provided with a column bottom connection groove, a reinforcing angle steel arrangement groove and a column side connection rib insertion groove, the interior of the reinforced concrete foundation is provided with a foundation inner anchor plate, foundation connection ribs and post-glue-injection holes; a column bottom shock absorber layer and reinforcing angle steel are arranged at the junction of the reinforced concrete foundation and the prefabricated assembly column; a limiting hoopplate is arranged outside the reinforcing angle steel; the foundation connection bars are connected with the column inner connecting reinforcement bars through a steel bar connection section, and a closed strip is arranged at the intersection of a post-poured concrete layer and the prefabricated assembly column. The connection strength of the structure can be enhanced, and the shock resistance ofthe structure can be improved. The invention also discloses a construction method of the connection structure of the prefabricated assembly column and the reinforced concrete foundation.

The invention discloses a composite lining structure of a shield water delivery tunnel, and a construction method for the same. The composite lining structure of the water delivery tunnel comprises ashield tunnel pipe sheet on an outmost layer and a steel lining on an inner layer, wherein the steel lining is cylindrical; and a reinforcement ring is welded on the outer surface of the steel lining.The composite lining structure is characterized in that a flexible liner is disposed at a degree of 240 DEG-300 DEG on the outer surface of the steel lining; a drainage floral tube is disposed on theouter surface of the steel lining; a longitudinal drainage pipe is disposed on the bottom of the inner side of the shield tunnel pipe sheet; the drainage floral tube communicates with the longitudinal drainage tube by a connecting conduit; and a concrete filling layer is filled between the shield tunnel pipe sheet and the steel lining and between the shield tunnel pipe sheet and the flexible liner. The composite lining structure disclosed by the invention has the beneficial effects that bearing proportions of tubes on different composite lining layers can be allocated rationally; a bearing advantage of tube materials can be exerted; a possibility in cracking and breaking of the concrete filling layer and the shield tunnel pipe sheet is reduced; and with a systematic meshed drainage system, inward sinking and swelling on pipe walls of the steel lining caused by accumulation of external water pressures can be avoided, and pipeline water delivery efficiency is ensured.

The invention provides an unequal-height longitudinal beam bearing straight wall bottom plate type lining with a longitudinal water collecting and releasing channel formed in the tunnel bottom and a drainage system structure of the lining. The effect of underground water on the tunnel lining bottom structure is reduced or even eliminated, and the problems that a tunnel inverted arch of a karst orunderground water development area upwards floats and deforms, or the tunnel bottom structure is cracked and damaged is effectively solved to ensure the stability and safety of tunnel construction andoperating. Longitudinal beams fixedly connected with an arch wall secondary lining structure are arranged at the bottoms of side walls on the two sides of the arch wall secondary lining structure toserve as a bearing structure of the arch wall secondary lining structure, and the sections of the longitudinal beams are unequal-height variable sections. A bottom plate is arranged between the longitudinal beams on the two sides, the two transverse ends of the bottom plate are connected with the longitudinal beams on the same side, a box-type construction body is arranged on the lower portion ofa plate body along the longitudinal center, and a longitudinal communicating cavity inside the box-type construction body serves as the water collecting and releasing channel. Drainage systems comprise the arch wall range drainage system, the tunnel bottom drainage system and the tunnel bottom interior drainage system which communicate with the water collecting and releasing channel.

The invention discloses a preparation device of a lithium ion battery anode silicon-carbon composite material, and relates to the technical field of battery manufacturing. The preparation device of the lithium ion battery anode silicon-carbon composite material includes a machine body, the bottom of the machine body is welded with a base, and the top of the machine body is welded with a cylinder.The top of the inner wall of the cylinder is fixedly provided with a driving motor. An output shaft of the driving motor is fixedly connected with the top end of a driving rod through a coupling. Thetop of the machine body is provided with a material groove. The bottom end of the driving rod is fixedly provided with a grinding ball protection mechanism. The preparation device of the lithium-ion battery anode silicon-carbon composite material is operating based on the cooperation of the grinding ball protection mechanism and an attached powder scraping mechanism. The device can effectively reduce the high temperature generated during the working process of a grinding ball. At the same time, the grinding ball protection mechanism eliminates a static charge on the surface of the grinding ball. The simultaneous operation of the attached powder scraping mechanism can form a continuous and intermittent barrier between powder and the grinding ball.

The invention discloses a double-cantilever full-folding sun and rain shelter, which comprises a shelter cloth reel device, a traveling device, shelter cloth fixing rods, a shelter cloth fixing frame and an inverted V-shaped bracket device, wherein the shelter cloth reel device is arranged at the upper end of the traveling device; the shelter cloth fixing rods are connected to the shelter cloth fixing frame; the shelter cloth fixing frame and the traveling device are correspondingly arranged on front and rear parts; the inverted V-shaped bracket device is arranged between the traveling device and the shelter cloth fixing frame; the traveling device, the inverted V-shaped bracket device and the shelter cloth fixing frame are arranged in parallel; shelter cloth is connected between the shelter cloth reel device and the shelter cloth fixing frame. The double-cantilever full-folding sun and rain shelter is quickly mounted and dismounted and easily carried on a construction site when being used, and is convenient to move, high in windproof capability and smooth in drain, the trouble of water scooping is radically eliminated, all subsequent work can be easily finished in rainy days, and cracks can further be prevented in the hot sun or hot weather.

The invention discloses a planted roof waterproof heat preservation and exhaust system with exhaust devices and a construction method. The planted roof waterproof heat preservation and exhaust system comprises the rotatable exhaust devices which are evenly distributed in split seams of a planted roof, a flange plate, a steel pipe base, a connecting sleeve and a bend exhaust pipe, wherein the flange plate, the steel pipe base, the connecting sleeve and the bend exhaust pipe are sequentially arranged from bottom to top; the flange plate is fixed on a structural floor; the steel pipe base is fixedly welded on the flange plate; the upper end of the steel pipe base is detachably fixedly connected with the bend exhaust pipe through the connecting sleeve; exhaust holes which are evenly distributed are formed in the steel pipe base covered with a piece of glass cloth; on the structural floor of the split seams, an FTC heat preservation layer, a waterproof leveling layer, a waterproof layer and a fine stone concrete protective layer are sequentially arranged on the peripheries of the rotatable exhaust devices from bottom to top; a ventilation channel is reserved in the FTC heat preservation layer and filled with FTC dry powder; and the waterproof layer is upward returned to the rotatable exhaust devices for at least 150 mm. The planted roof waterproof heat preservation and exhaust system has the characteristics of safety, applicability and the like, has good popularization and practical value and produces good economic benefits after extensive application and popularization.

The invention discloses a noise reduction protection cover for a numerical control machining center, comprising a noise reduction protection cover body, bottom fixing feet are welded at the bottom four corners of the noise reduction protection cover body, and a control One side of the noise reduction shield body is rotatably connected with a lifting sound insulation board through a rotating connecting shaft, and a telescopic cylinder is fixed on the inner surface of the lifting sound insulation board, and the telescopic cylinder is connected to the noise reduction shield body through a telescopic rod. In the present invention, firstly, by providing a lifting sound insulation board, the automatic opening and closing of the telescopic cylinder can be controlled, so as to facilitate the operation of the staff. Vibration protection to prevent cracks and damage to the hollow soundproof glass caused by the vibration of the CNC machining equipment, thereby prolonging the service life of the noise reduction shield of the CNC machining center.

The invention discloses a Si-Sn composite material used for a Li-ion battery anode and a preparation method thereof. The composite anode material is of a Sn-fiber-wound Si particle composite structure and composed of two elements Si and Sn, wherein the Si content is 20-70at.% and the balance is Sn. According to the preparation method of the composite anode material, Si and Sn powder are mixed and the mixed powder is ball milled by using a high-energy ball milling method in an argon atmosphere; under the action of high-energy impact, metal Sn particles deform seriously, are subjected to cold welding and torn to form Sn fibers; through further ball milling, fiber-structured ductile-phase metal Sn formed after high-energy ball milling and Si particles smashed under high-energy impact in the ball milling process are composited to form a Sn-fiber-wound Si particle composite structure. The novel Sn-fiber-wound Si composite material is simple in preparation process and low in cost; in addition, the composite material is novel and unique in structure and excellent in electrochemical performance and therefore has excellent application prospect.

The invention provides a prefabricated concrete double-T type plate suspension structure and a construction method thereof. The prefabricated concrete double-T type plate suspension structure comprises a double-T type plate, and further comprises a cantilever end suspension structure and a plate rib suspension structure, the cantilever end suspension structure comprises cantilever ends of the double-T type plate on both sides, a connecting structure, an additional horizontal tie structure, a hanging rib, a hanging part and a joint sealing material, and the plate rib suspension structure comprises rib beams, top plates on both sides of the rib beams, a rib-penetrating steel sleeve, an upper inverted-U-shaped snap ring and a lower U-shaped snap ring. Or a laminated concrete layer is arrangedon the upper side of the double-T type plate, and the hanging rib is fixedly connected with a laminated bar-mat reinforcement. The prefabricated concrete double-T type plate suspension structure andthe construction method thereof are convenient to construct and are suitable for two situations of pre-burying before plate construction and later additionally-arranging after plate construction, a hanging node can be used for hanging of a suspended ceiling, an air duct, a lamp and other pipelines, and the prefabricated concrete double-T type plate suspension structure and the construction methodthereof are suitable for floor structures or roof structures and can further be used for connection of other prefabricated beam-plate members.

A big skewback base plate type lining and a drainage system structure thereof are used for reducing and even eliminating the influence of underground water on the bottom structure of a tunnel lining,so that the problem that a tunnel inverted arch floats upwards or a tunnel bottom structure cracks and is damaged in karst or underground water development areas are effectively solved, and the stability and safety of tunnel construction and operation are ensured. Big skewbacks which are integrally solidified with an arch wall secondary lining structure are arranged at the bottoms of the two sidesof the arch wall secondary lining structure, a base plate is arranged between the big skewbacks on the two sides, and the two ends of the base plate are solidified with the skewbacks on the two endscorrespondingly. A center box-shaped construction body which extends along the longitudinal center line of a base plate body is arranged under the base plate body, and an inner cavity of the center box-shaped construction body is used as a central water collecting and drainage channel. The box-shaped construction body is arranged under the big skewbacks on the two sides, the longitudinal through inner cavity of the box-shaped construction body is used as a base water collecting channel, and in-hole side ditches are fixedly formed in the big skewbacks on the two sides. A drainage system comprises an arch wall range drainage system body, a tunnel bottom drainage system body and an in-tunnel drainage system body, wherein the arch wall range drainage system body communicates with the center water collecting and drainage channel; the tunnel bottom drainage system body and the central water collecting channel communicate with the base water collecting channel, and the in-tunnel drainage system communicates with the in-hole side ditches and the central water collecting channel.

The invention discloses a smooth type spliced electrical pole. The smooth type spliced electrical pole comprises a main body pole base, a spliced pole body, a connecting flange, reinforcing ribs, a sliding sleeve and a connecting sleeve, wherein the spliced pole body is arranged on the upper portion of the main body pole base, the connecting flange is arranged at the lower end of the main body pole base and shares the same axis with the main body pole base, the reinforcing ribs are evenly distributed on the inner edge of the main body pole base, the sliding sleeve is fixedly arranged on an inner ring of the bottom end of the spliced pole body, and the connecting sleeve is arranged on the lower portion of the spliced pole body and is connected with an inner ring of the sliding sleeve in a sleeving mode. According to the smooth type spliced electrical pole, splicing and assembling of the main body pole base and the spliced pole body are adopted, installing and transporting speed can be improved, effective transportation in narrow and rugged spaces is convenient, rush repairing time is shortened, and the potential safety hazard for people around is reduced; through the combination of a common shearing disc and a reinforced shearing disc, the anti-shearing strength is improved, pull-crack damages caused by eccentricity are avoided, supplementary anchorage is conducted through the connecting flange, and the stability is improved.

The invention relates to a granulation machine for casting smelting molten iron of iron alloy series products into granular products. The granulation machine comprises a base, a cooling mechanism, a casting and forming mechanism, a turning-over and resetting mechanism and a center power device. A circle of track is arranged on the top of the base. The cooling mechanism is installed on the track ina sliding manner. The casting and forming mechanism is installed on the cooling mechanism in a manner of being capable of rotating up and down. The center power device drives the cooling mechanism and the casting and forming mechanism to do circumferential motion along the track synchronously. The cooling mechanism provides cooling water for the interior of the casting and forming mechanism so that molten iron on the casting and forming mechanism can be cooled and formed into the granular productions. The turning-over and resetting mechanism turns over the casting and forming mechanism up anddown after the granular productions are formed. The granulation machine solves the problems that a casting mould is ablated or cracked easily and is short in service life, and automatic molten iron casting, demoulding and forming of the iron alloy series smelting products are achieved.

The invention relates to a cast-in-place concrete fire-proof thermal insulation compound external formwork and a use method thereof. A formwork body is provided with an internal protection layer, an internal binding layer, a compound thermal insulation layer, an external binding layer and an external protection layer from inward to outward in sequence; a trapezoid groove which is connected with aconcrete structure in a matched mode is formed in the inner side wall of the internal protection layer, and a coarse surface which is connected with the internal binding layer in a matched mode is arranged on the outer side wall of the internal protection layer; and the compound thermal insulation layer is formed by compounding a high wearing-resisting thermal insulation material and a high fire-proof thermal insulation material in an embedding and sleeving mode, the compound thermal insulation layer is arranged between the internal protection layer and the external protection layer, and coarse surfaces are arranged on the inner side wall and the outer side wall of the external protection layer. A phenomenon of crack and breakage of the peripheries of anchor holes is avoided, the thermal insulation layer has the properties of high strength, high fire resistance and high thermal insulation, the comprehensive performance is higher, the thermal insulation layer has the properties of fireproof and thermal insulation, the thermal insulation layer is not subjected to elastic deformation under the action of lateral pressure of concrete, high flatness of the fire-proof thermal insulationcompound external formwork after construction is ensured, and the binding intensity is high.

The invention provides an ultra-light armor which comprises a ceramic layer component, a packaging layer, a foam titanium component and a back plate; the ceramic layer component is packaged by the packaging layer; the foam titanium component is arranged on the surface of the packaging layer; the back plate is arranged on the surface of the foam titanium component; the ceramic layer component is formed by splicing ceramic small blocks; and the packaging layer is made of fiber cloth. For the ultra-light armor provided by the invention, by using foam titanium as a novel material, the problems that too large damage area and too severe deformation of the back plate caused by the fact that an armor resists high-energy impact are solved, the overall areal density of an armor plate is greatly lowered, and the multi-bullet resistance is improved. The invention further provides a preparation method for the ultra-light armor.

The invention provides a detachable seamless refrigerating cabinet door sealing tape which is used for sealing seams between a refrigerating cabinet door body and a cabinet body. The detachable seamless refrigerating cabinet door sealing tape comprises a square-frame structural door sealing tape body which is formed by four frame sides adaptable to the refrigerating cabinet door body; the door sealing tape body is formed by carrying out seamless integral casting and vulcanization on a liquid polyurethane elastomer material; and the frame sides comprise convex wedges, sealing heat-insulating sides and sealing laminating strips, wherein the convex wedges are used for being inserted into edge grooves of the refrigerating cabinet door body, the sealing heat-insulating sides are used for sealing the seams between the refrigerating cabinet door body and the cabinet body, and the sealing laminating strips are used for being laminated on the cabinet body by using the own weight of the refrigerating cabinet door body. The invention further discloses a manufacture process of the detachable seamless refrigerating cabinet door sealing tape. The detachable seamless refrigerating cabinet door sealing tape has the advantages of excellent elasticity, tightness, heat-insulating performance, cold resistance and anti-collision performance, no migration of plasticizer molecules, difficulty in cracking and damage of the four corners of the door sealing tape, capability of achieving automatic production, and energy-saving and environment-friendly performance in production process.

The invention discloses an energy-saving and environmentally-friendly thermal insulation material, which comprises the following raw materials: calcium silicate board waste powder, nano-scale ultrafine calcium carbonate, modified shell powder, sodium matrix white bentonite, an organosilicon water repellent, cold water type poly vinyl alcohol, a powdered organosilicon defoamer, high aluminum refractory fiber, polyethylene oxide block polybutyl acrylate, water glass, and water. According to the present invention, the prepared energy-saving and environmentally-friendly thermal insulation materialhas the substantially improved thermal insulation performance, can be prevented from being cracked and damaged when the external temperature changes greatly, can prolong the service life of the object wrapped in the middle of the thermal insulation material, has the improved thermal insulation effect, and can prevent the fire disaster phenomenon caused by the too high external temperature.

The invention discloses a boot last base comb-type tunnel bottom lining structure and a drainage system thereof. The effect of underground water on a tunnel lining bottom structure is reduced or eveneliminated, the problem of karst or underground water development region tunnel inverted arch floating deformation or tunnel bottom structure cracking and damage is solved, and the tunnel constructionand operation stability and safety are ensured. The bottoms of side walls on the two sides of an arch wall secondary lining structure are provided with bases fixedly connected with the arch wall secondary lining structure, the bases are adopted as bearing structures of the arch wall secondary lining structure, and a longitudinal-through boot inner cavity inside the structure is adopted as a tunnel longitudinal drainage channel. A comb-type tunnel bottom structure with the two transverse sides in weak connection with the bases are arranged between the boot-shaped bases on the two sides, a paving bottom layer is arranged on the comb-type tunnel bottom structure, the lower portion of the comb-type tunnel bottom structure is provided with a transversely-spaced and longitudinal-through lower cavity as a tunnel bottom underground water longitudinal drainage channel. The arch wall range drainage system is communicated with the boot inner cavity, the tunnel bottom drainage system is communicated with the lower cavity, and a ballast bed accumulated water drainage system is communicated with the boot inner cavity and the lower cavity.

The invention discloses a combined arched tunnel lining of an inversely truncated-cone-shaped hollow tunnel bottom and a drainage system structure thereof in order to reduce and even eliminate the effect of underground water on the bottom structure of the tunnel lining, effectively solve the problems that tunnels in karst or underground water development areas inversely arch, come up and deform ortunnel bottom structures are cracked and damaged, and ensure the stability and safety of construction and operation of the tunnels. Tunnel bottom construction bodies are arranged below the bottoms oftwo side walls of an arch-wall secondary lining structure to serve as a bearing structure; each tunnel bottom construction body is of an inversely truncated-cone-shaped hollow structure and is formedby integrally pouring upper bottom plates, transverse webs at two sides, lower bottom plates and longitudinal webs, and tunnel bottom cavities are formed longitudinally at intervals in the tunnel bottom construction bodies, wherein the lower bottom plates and the longitudinal webs are arranged longitudinally at intervals. Central water ditches which are longitudinally communicated are formed along the longitudinal centers of the lower brims of the plate surfaces and communicated with all the tunnel bottom cavities. The drainage system includes a drainage system communicated with the tunnel bottom cavities within an arched-wall range, a tunnel bottom drainage system and an in-tunnel drainage system.

The invention discloses a sharpening machine for the weld reinforcement in a longitudinal welded pipe. The sharpening machine comprises a sharpening trolley comprising a trolley body, a sharpening grinding machine arranged on the trolley body, and a driving device connected with the sharpening trolley; a driving element drives the sharpening trolley to go into the longitudinal welded pipe to sharpen the weld reinforcement. The sharpening machine for the weld reinforcement in the longitudinal welded pipe is capable of performing total-length or local sharpening on a weld joint in a steel pipe stably, reliable and automatically, and therefore, the labor intensity of the working personnel is reduced and the working performance is improved. Besides, the overall structure of the sharpening machine is simple, and an adjustment method of the sharpening machine is simple, convenient and easy to operate; the involved sharpening parts are not easy to damage and low in maintenance cost.

The invention relates to the technical field of rail traffic equipment, and discloses a pantograph protection device for rail traffic. The pantograph protection device comprises an upper pantograph frame; a sliding plate is arranged on one side of the top end of the upper pantograph frame; the top end of the sliding plate is movably connected with a pneumatic connecting rod which is arranged in the middle of the top end of the upper pantograph frame; a supporting frame is fixedly mounted at the top end of the pneumatic connecting rod; and a fixing frame is fixedly mounted on one side of the top end of the supporting frame. According to the pantograph protection device for rail traffic, through arrangement of adjusting clamping sleeves and clearing balls, a contact net is under half cladding of the clearing balls, thus the adjusting clamping sleeves in high-speed movement drive the clearing balls in the inner walls of the adjusting clamping sleeves to rotate at a high speed under the friction effect of the relatively-static contact net, then hard burrs or contaminants on the surface of the contact net are polished and cleared, abrasion of the sliding plate in high-speed movement islowered, and the service life of the sliding plate is effectively prolonged.

The invention discloses a water curtain cooling and humidifying device for poultry breeding, and relates to the technical field of poultry breeding. The water curtain cooling and humidifying device for poultry breeding comprises a main support, a combined mechanism, an adjusting mechanism, a circulating mechanism, an air inducing mechanism and a lifting mechanism are arranged on the main support,a left support and a right support are arranged at the two sides of the main support correspondingly, and four sets of brake wheels are movably installed on the outer surfaces of the bottoms of the main support, the left support and the right support correspondingly; and a first mounting frame and a second mounting frame are welded to the outer surfaces of the tops of the left support and the right support correspondingly. According to the water curtain cooling and humidifying device for poultry breeding, the split type structural design is achieved, the labor input and the labor burden duringmounting are reduced, the mounting requirements of different breeding places are better met, damage caused by freezing of the interior of a fixing frame is avoided, and the service life of the deviceis prolonged; and the device is prevented from being cracked and damaged due to water seepage into the wall body in the use process.