102results about How to "Filled tightly" patented technology

The invention relates to the technical field of cable manufacturing, and provides an inorganic mineral insulation high-temperature-resistant cable filling device and method.The inorganic mineral insulation high-temperature-resistant cable filling device comprises a back plate, a discharging hopper is installed on the surface of the back plate, a discharging mechanism is arranged on one side of the discharging hopper, and a belt guiding assembly, a belt guiding frame and a belt winding mechanism are arranged below the discharging hopper; and a welding mechanism is arranged on one side of the tape winding mechanism, the bottom end of the discharging hopper is connected with a filling outer cylinder, and a supporting table is fixed to the top of the discharging hopper. Through the arrangement of the driving mechanism, the grinding discharging rod, the outer grinding cylinder and other structures, magnesium oxide powder can be subjected to secondary grinding while discharging and filling are conducted, so that the granularity is more uniform and fine, filling is more compact, meanwhile, through the arrangement of the rotary heating assembly, electromagnetic heating can be achieved during rotation, and the electromagnetic heating effect is improved. And heat can be conducted to the interior of the outer grinding cylinder, and powder can be heated to be more dry while grinding and discharging are conducted.

The utility model relates to the technical field related to powder gears, in particular to powder metallurgy gear forming equipment which is long in service life and resistant to abrasion, supporting feet are fixedly installed at the bottom of a working table and fixedly arranged at the four corners of the bottom of the working table respectively, and a powerful pressing machine is fixedly arranged at the top of the working table. The powerful pressing machine is arranged in the middle, a pushing machine is slidably arranged on one side of the powerful pressing machine and slidably installed on one side of the right angle of the workbench, and a lubricator is fixedly installed on the other side of the powerful pressing machine and fixedly installed on one side of the slope of the workbench. A shell, a sliding rail, a side seam, a manufacturing area, a mold, a high-temperature heating plate, a protective sleeve and a motor core are arranged in the working table, and the vibration device is additionally arranged on the device, so that metal powder can be more compactly filled in a vibration mode when entering the mold; and noise can be reduced to a certain extent when a finished product is pressed in the later period.

The invention discloses a large-void open-graded asphalt mixture as well as a preparation method and application thereof, according to the mass percentage, the passing rate of 13.2 mm sieve pores of the large-void open-graded asphalt mixture is 95-100%, the passing rate of 9.5 mm sieve pores of the large-void open-graded asphalt mixture is 39.2-39.6%, the passing rate of 4.75 mm sieve pores of the large-void open-graded asphalt mixture is 7.0-7.2%, and the passing rate of 2.36 mm sieve pores of the large-void open-graded asphalt mixture is 6.2-6.4%. The large-porosity open-graded asphalt mixture is prepared from the following components in parts by mass: 6.0 to 6.2 parts of high-viscosity and high-elasticity modified asphalt, 0.3 to 0.5 part of basalt fiber, 95 to 105 parts of mixed aggregate and 0 to 2 parts of mineral powder, the mixed aggregate comprises the following components in parts by mass: 45-50 parts of a first coarse aggregate with the thickness of 10-15mm, 45-50 parts of a second coarse aggregate with the thickness of 5-10mm and 5-10 parts of a fine aggregate with the thickness of 0-3mm. According to the open-graded asphalt mixture with the large void ratio, the technical problems that in the prior art, a drainage asphalt pavement formed by paving the open-graded asphalt mixture with the large void ratio is poor in pavement performance such as drainage performance, rutting resistance and cracking resistance and poor in durability are effectively solved.

The invention relates to the technical field of metal casting, in particular to casting powder for continuous casting of a high-carbon steel slab and a continuous casting method. The casting powder comprises the following components in parts by weight: 15-50 parts of a pre-melting material, 10-30 parts of wollastonite, 3-10 parts of quartz, 3-8 parts of albite, 2-5 parts of magnesia, 2-4 parts of borax, 10-15 parts of sodium carbonate, 1-3 parts of lithium carbonate, 1-2 parts of bentonite, 4-8 parts of graphite, 1-3 parts of an adhesive and 1-4 parts of isopropyl trioleate acyloxy titanate. The invention also provides a preparation method of the composition. Compared with the prior art, the prepared casting powder has the advantages of being free of fluorine, environmentally friendly, good in melting performance and the like.

The invention relates to an energy-saving and environment-friendly oxygen enrichment unit and a using method thereof. The energy-saving and environment-friendly oxygen enrichment unit comprises machine barrels, the machine barrels are filled with molecular sieve particles, an air inlet pipe and a nitrogen discharging pipe are connected between the top ends of the two machine barrels, an oxygen discharging pipe is connected between the bottom ends of the two machine barrels, and a first three-way control valve is installed on the air inlet pipe; the position of the communicating groove is adjusted through rotation of the barrel sleeve, and then the communicating groove is matched with the feeding groove and the discharging groove, so that automatic opening and closing of the two ends of the machine barrel are achieved, and when the two ends of the machine barrel are in an opening state, a second motor works to drive a rotating shaft and a spiral blade to rotate, and molecular sieve particles in the machine barrel are driven to move upwards; the molecular sieve particles in the first conical shell are supplemented into the machine barrel, the molecular sieve particles located above the machine barrel enter the second conical shell, the molecular sieve particles in the machine barrel are gradually replaced from top to bottom, and automatic replacement of the molecular sieve particles in the machine barrel is achieved.

The utility model relates to the technical field of slope protection molds, in particular to a porous slope protection bricklaying prefabricating mold which comprises a bricklaying mold, and a prefabricating groove is formed in the top end of the bricklaying mold. The built-in shaping part is linked with the vibration mechanism, so that cement can be more uniformly distributed in the mold and tightly filled in the mold by a mixture in the mold in a mechanical vibration mode, cavities in the concrete are prevented, the concrete can be firmer, the compactness of the cement can be higher, and the service life of the mold is prolonged. And the situation that the concrete needs to be vibrated and homogenized one by one through vibrating equipment after the concrete is poured into the mold is reduced, the operation steps are relatively reduced, and the working efficiency is improved.

The invention provides an automatic precise glue injection device for sealing cover assembly and a process method, belongs to the field of aeronautical manufacturing aircraft assembly, is applied to a surface sealing process for mounting sealing covers on the heads of bolts, nuts and rivets at structural sealing parts, and realizes automatic mixing of a sealant and automatic glue injection of the sealing covers by developing an automatic system. The gluing amount is accurately controlled, and the assembly quality is improved. The problems of sealant injection and sealant mixing of the sealing cover can be solved, and the technical problems of sealant mixing time control and precise control of the sealant injection amount of the sealing cover are mainly solved; the problem that the hollow quality is unstable during glue injection filling is solved; the problems of wiredrawing and leakage environment cleaning influence during glue injection are solved; the problems of reducing mixing time and rubber material waste and improving rubber injection efficiency are solved.

The invention relates to the technical field of ecological restoration and water resource management, in particular to a novel brick material based on corn straw as well as a preparation method and a use method of the novel brick material, and provides the novel brick material based on the corn straw in order to solve the problems of high water loss speed and slow ecological restoration of peat land. Comprising the following raw material components: corn straw powder, corn straw charcoal, calcium bentonite and corn stigma fiber, the corn straw powder, the charcoal, the calcium bentonite and the corn stigma fiber are mixed according to a specific proportion, and the mixture is subjected to compression molding to prepare the brick with good moisture retention performance and ecological compatibility. The method is specially used for water retention and vegetation recovery of the peat land.

The invention provides an optical fiber image transmission element for ultraviolet detection and a preparation method and application thereof, and the preparation method comprises the steps: carrying out the pickling of the cross section of one end of the optical fiber image transmission element, enabling the cross section to form a microporous structure with the depth of 10-50 [mu] m, and obtaining a pickled optical fiber image transmission element; a fiber core of the optical fiber image transmission element is made of an easily acid-etching material, and a cladding is made of an acid-etching-resistant material; the preparation method comprises the following steps: dissolving CsX and PbX2 in an organic solvent to obtain a precursor solution; wherein X is at least one of Cl, Br and I; the precursor solution is heated, gas is introduced, the gaseous precursor solution is brought to the microporous structure, the precursor solution reacts at the microporous structure in a gaseous form to generate CsPbX3 quantum dots, the microporous structure is filled, and a filled optical fiber image transmitting element is obtained; and the protection window is arranged on the filling surface of the filling optical fiber image transmission element, so that the optical fiber image transmission element for ultraviolet detection is obtained, the optical fiber image transmission element has the advantages of high brightness and high resolution, and the efficiency and the resolution of an ultraviolet detector can be effectively improved.

The invention provides a preparation method of heat-conducting paste with high thermal conductivity, which comprises the following steps: forming a component A by 50-80 parts of copolymer epoxy resin, 10-20 parts of acidified graphite, 3-6 parts of submicron powder and 5-10 parts of a silane coupling agent, and forming a component B by 60-80 parts of polyhydroxy resin, 15-25 parts of liquid metal modified three-dimensional graphene and 8-12 parts of a boron nitride modified aluminate coupling agent; meanwhile, 2-5 parts of a flame retardant and 1-3 parts of a plasticizer are added, so that the heat-conducting paste with good stability and high heat conductivity is obtained.

This invention discloses a combined integrated molding inductor processing equipment, relating to the technical field of inductor processing. It includes a processing table equipped with a winding mechanism, a moving mechanism, and a detection component. A die-casting mechanism extends from the side of the processing table. The die-casting mechanism includes an upper mold, a lower mold, an injection component, a shielding component, and a linkage component. The upper mold and the lower mold are connected by a guide post. The injection component is located at the side of both the upper and lower molds and is movably connected to the upper mold via the linkage component. An umbrella-shaped canopy formed by a sealing assembly completely isolates the injection port from the external environment, ensuring stable flow of magnetic powder in a constant micro-environment. This avoids interference from external airflow on the powder spray trajectory, allowing the powder to fill the mold cavity formed by the upper and lower molds uniformly and densely.

The utility model discloses an automatic bonding and pressing device for bamboo bowls. The automatic bonding and pressing device comprises a machine base, a drying box, a hot air pipeline, a lifting air cylinder, an upper die base and a lower die base. A containing space is arranged in the drying box, and the lower die base is arranged in the containing space and used for positioning and placing bamboo bowls to be bonded and pressed. The lifting air cylinder is connected with the upper die base, and the hot air pipeline is communicated with the drying box and used for introducing hot air into the drying box. The lifting air cylinder can drive the upper die base to be pressed on the bamboo bowls on the lower die base so as to apply uniform pressure to the bonded bamboo bowls, so that glue can be more tightly filled in joints and gaps between bamboo chips, and the bonding strength is improved; the hot air pipeline can introduce hot air into the drying box, so that the chemical reaction of glue is accelerated, the curing time is shortened, and the production efficiency of the bamboo bowls is improved; an annular groove is formed between the top column part and the disc part of the lower die base and can be in positioning abutting connection with the circumferential wall of the bamboo bowl so as to prevent the bamboo bowl from shifting in the pressing process.

This invention relates to the field of polymer materials technology, specifically to a method for preparing and applying a rigid polyimide foam reinforced with aluminum honeycomb. The method for preparing the rigid polyimide foam reinforced with aluminum honeycomb provided by this invention includes steps such as surface pretreatment of the aluminum honeycomb core material and fixing the pretreated aluminum honeycomb core material into a molding die. The rigid polyimide foam material reinforced with aluminum honeycomb obtained by this invention not only possesses high specific strength and high specific stiffness, but also inherits the excellent properties of polyimide foam such as high temperature resistance, flame retardancy, low smoke, and thermal insulation. The introduction of the aluminum honeycomb skeleton also improves the material's impact resistance and dimensional stability, making it an ideal multifunctional integrated lightweight structural material with promising application prospects.

The invention provides a novel caisson revetment repairing method. The repairing method sequentially comprises the steps of dismantling a ground surface layer and a revetment breast wall above a connecting seam part, cleaning an original filter material and an insertion plate of the caisson connecting seam, preparing a reinforced concrete insertion plate with a semicircular or arc-shaped section and a reinforced concrete insertion plate with two arc-shaped ends, installing the insertion plate of the caisson connecting seam, backfilling the caisson connecting seam with a gravel filter material, and repairing the caisson connecting seam. And breast wall recovery processing and ground recovery. According to the method, only half of the breast wall area above the caisson joint needs to be broken, the original filter materials and plain concrete inserting plates at the caisson joint can be removed in a small construction space, the novel inserting plates can be replaced, the problems of sand leakage and the like of an original caisson revetment can be effectively solved, and the influence of construction on a site can be reduced.

The utility model relates to the technical field of foundation pit supporting construction, and particularly discloses a soft rock pre-stressed anchor cable fixed-point pressure grouting structure which comprises a steel strand, a primary grouting pipe, a secondary grouting pipe and a valve body, a grouting hole is formed in the primary grouting pipe, the valve body is arranged on the secondary grouting pipe, a grout outlet is formed in the valve body, and the grouting hole is communicated with the grouting hole. The valve body is provided with an adjusting assembly used for controlling the pulp outlet to be opened and closed. The anchor cable has the effect of improving the bearing capacity of the anchor cable.

The invention belongs to the technical field of underground diaphragm walls and guide walls, and particularly relates to a formwork trolley for open excavation of underground diaphragm walls and guide walls of subway stations, which comprises a movable trolley, the movable trolley is arranged on the ground, and a supporting mechanism and two inverted L-shaped supporting guard plates are arranged on the movable trolley. The two inverted-L-shaped supporting protection plates are symmetrically located on the two sides of the supporting mechanism, the supporting mechanism is used for supporting the inverted-L-shaped supporting protection plates on the side wall of a groove section, a vibration mechanism is arranged on the inverted-L-shaped supporting protection plates, and the vibration mechanism comprises a reciprocating assembly arranged on the inverted-L-shaped supporting protection plates. A vibrating piece is arranged at the moving end of the reciprocating assembly and used for acting on the inverted-L-shaped supporting protection plate so as to assist in concrete filling. The construction method has the advantage that the formwork for underground diaphragm wall guide wall pouring can be conveniently installed and adjusted, and then the construction efficiency is powerfully improved.

The invention provides a shield gate trench device and a manufacturing method thereof, and the method comprises the steps: forming a dielectric material layer on the side wall and the bottom of a trench, and forming a polycrystalline silicon layer in the trench; etching the polycrystalline silicon layer to form a shielding grid electrode; the dielectric material layer is etched to form a shield gate dielectric layer, and the top end of the shield gate dielectric layer is lower than the top end of the shield gate; etching the shielding grid so that the top end of the shielding grid is not higher than the top end of the shielding grid dielectric layer; forming an isolation layer on the shielding grid electrode; and forming a gate oxide layer on the side wall of the trench above the isolation layer, and forming a control gate in the trench above the isolation layer. The shielding grid polycrystalline silicon is subjected to secondary etching, a small groove in the side edge of the top of the shielding grid can be eliminated, the isolation layer can be compactly filled, and the isolation reliability of the shielding grid and the control grid is improved. In addition, a protection layer is formed on the side wall of the groove above the shielding grid, the shape of the side wall of the groove is protected when the shielding grid polycrystalline silicon is subjected to secondary etching, and the performance of the device is improved.

The invention relates to a humidifier and a manufacturing process of the humidifier. The humidifier (100) comprises a wound portion (10) surrounding a central axis (80) and comprising enclosures (12), a first of the enclosures comprising a first pair of semipermeable membranes (14) separated by a first spacer layer (16) to form one of the moisture channels (20), and a second of the enclosures comprising a second pair of semipermeable membranes (14) separated by a second spacer layer (18) to form one of the dry gas channels (22). The dry gas channel (22) is configured to receive a dry gas (52) through at least a portion of the first face region (24) of the wrap portion and in an axial direction along the dry gas channel. The moisture channel (20) is configured to receive a moisture gas (50) through at least a portion of a second face region (26) of the wound portion and in an axial direction along the moisture channel, the second face region (26) being opposite the first face region (24).

The invention provides an integrated steel bar locking full-grouting sleeve with clamping grooves. The integrated steel bar locking full-grouting sleeve comprises a grouting sleeve body, an upper sealing plug, a lower sealing plug, an upper clamping groove positioner and a lower clamping groove positioner. The upper end of the grouting sleeve body is provided with an upper opening and a grout outlet, and the lower end is provided with a lower opening and a grouting opening; the grout outlet and the grouting opening are communicated with the interior of the grouting sleeve body; the upper opening and the lower opening are axially arranged; the grout outlet and the grouting opening are horizontally formed relative to the grouting sleeve body, and the upper sealing plug and the lower sealing plug are arranged in the upper opening and the lower opening correspondingly; the upper clamping groove positioner and the lower clamping groove positioner are connected with one ends of the adjacent steel bar pieces respectively. The method has the advantages of being simple in structure, convenient to construct, small in material consumption, good in effect and the like, has a good use prospect and can be widely applied to fabricated buildings.

The utility model relates to the technical field of steel sheet pile lock catches, in particular to a steel sheet pile lock catch with a self-sealing rubber insertion strip, which comprises a female buckle and a male buckle, the female buckle comprises a female buckle head, a sleeve and a telescopic rod, the top surface of the female buckle head is provided with a wedge-shaped groove, the sleeve is positioned on the left side of the female buckle head, and the telescopic rod is fixed on the left side surface of the female buckle head and is in sliding insertion connection with the sleeve. The male buckle comprises a male buckle body and a sealing insertion strip, the male buckle body is connected with a wedge-shaped groove in the top face of the female buckle head in a sliding and inserted mode, the sealing insertion strip is fixed to the outer wall of the male buckle body and used for sealing, the adjusting mechanism is arranged on the top face of the sleeve and used for adjusting the overall length of the female buckle, and the adjusting mechanism comprises a limiting plate and a mounting plate which are fixed to the top face of the sleeve. By arranging the sealing grooves and the sealing insertion strips, the problem of water seepage of gaps at the lock catch connecting positions of the steel sheet piles is solved, and the water stopping performance is enhanced; by arranging the length-adjustable female buckle and the adjusting mechanism, the problem that a traditional lock catch cannot adapt to different construction scenes is solved, and it is ensured that the steel sheet piles are tightly connected in various projects.

The utility model relates to the technical field of building templates, in particular to a concrete building template for civil engineering, which comprises building templates, constraint components, rotating components and moving components, two side templates are arranged between the two building templates, a plurality of constraint sealing grooves are arranged on the building templates, the constraint components are arranged on the inner sides of the constraint sealing grooves, and the rotating components are arranged on the inner sides of the constraint sealing grooves. The restraining assembly comprises a sealing plate, a movable unlocking block and fixed teeth, the rotating assembly is meshed with the fixed teeth, the rotating assembly comprises a rotating gear, a plurality of restraining sealing grooves are formed in one side of the building template, and during pouring, a vibrating bar is inserted into the restraining sealing groove in the bottommost layer, so that concrete filling is more compact, air cavities are prevented from being formed, and the sealing effect of the building template is improved. And then different constraint sealing grooves are replaced and inserted according to the concrete pouring height, meanwhile, the lower portion is sealed again through a reset spring, and the concrete is firmer after being solidified and is very convenient to use.

The utility model discloses a pillow inner velvet material uniform filling device, and relates to the technical field of pillow inner filling. Comprising a bottom plate, a supporting column is fixedly installed at the top of the bottom plate, a material uniformizing and filling assembly is arranged at the top of the supporting column, the material uniformizing and filling assembly comprises a fixed sliding way, the fixed sliding way is fixed to the top of the supporting column, a sliding block is slidably installed in the fixed sliding way, and a containing box is fixedly installed at the top of the sliding block; first springs are installed on the two sides in the containing box at equal intervals. The motor is turned on to drive the rotating column to rotate, the rotating column can drive the rotating disc and the linkage column to rotate, the linkage column is in sliding connection with the interior of the middle of the linkage strip, the linkage strip, the support and the sliding block can be driven to slide back and forth in the fixed sliding way, and the containing box is driven to slide back and forth; and the first spring is stretched to drive the beating plate to beat and shake the pillowcase, so that the filler is more dispersed, and the possibility of uniform filling is greatly increased.

The utility model relates to the field of packaging, in particular to a dried orange peel storage packaging bag which comprises a packaging bag body, and the packaging bag body comprises a packaging bag front piece and a packaging bag rear piece. The two sides and the bottom of the packaging bag front piece are fixedly connected with the two sides and the bottom of the packaging bag rear piece through heat sealing to form sealing edges, and the top of the packaging bag body is provided with a leakage-proof sealing strip. The packaging bag front piece and the packaging bag rear piece are both bamboo-based packaging materials made of bamboo fibers, each bamboo-based packaging material comprises a body paper layer and a barrier coating, the body paper layer is a base material, and the two sides of the body paper layer are coated with the barrier coatings through a spraying process. The packaging bag body is made of the bamboo-based packaging material, the growth speed of bamboos is high, the bamboos are renewable resources, the influence of planting and felling on the environment is small, the concepts of green packaging and sustainable development are met, and the requirement of the packaging material for environment friendliness and sustainability is met; bamboo is widely distributed globally, resources are sufficient and easy to obtain, and compared with limited forest resources, bamboo supply is more stable.

The invention discloses an underwater crack repairing device and process based on a magnetic adsorption and self-expansion technology. The device comprises a magnetic adsorption moving platform, a repairing material storage and transportation and triggering module and a control and energy module. The magnetic adsorption mobile platform is adaptively adsorbed on the surface of an underwater structure through a disc type electromagnet with an independent pitching adjusting function; the repairing material storage and transportation and triggering module is used for accurately laying and controllably activating a self-expansion material unit with a built-in electric heating wire through pushing, grabbing, placing and triggering voltage stabilizing mechanisms which work cooperatively; the control module achieves automatic operation from crack three-dimensional modeling and intelligent path planning to full-process closed-loop control based on an ROS architecture. The technology comprises the steps of self-adaptive adsorption, high-precision scanning modeling, intelligent laying planning, precise material laying, electric heating power cooperative triggering curing and repairing effect rechecking. According to the invention, the full-process, high-precision and high-reliability automatic operation of underwater crack repair is realized, and the labor dependence and the operation risk are obviously reduced.

The invention provides high-temperature-resistant anti-rust oil as well as a preparation method and application thereof. The high-temperature-resistant anti-rust oil comprises the following components in parts by weight: 65-80 parts of base oil, 2-6 parts of an anti-rust agent, 1-5 parts of an antioxidant, 1-4 parts of a corrosion inhibitor, 0.5-2 parts of a film-forming agent and 0.05-0.85 part of a high-temperature stabilizer, the high-temperature stabilizer is formed by mixing montmorillonite and an N-containing nano material, and the N-containing nano material is prepared by reacting 3, 5-diamino-4-chlorobenzenesulfonic acid with p-hydroxybenzoic acid. The high-temperature-resistant anti-rust oil provided by the invention has excellent anti-rust performance and high-temperature stability.

The utility model discloses a hollow sheet part wet-type cold isostatic pressing forming die, which relates to the technical field of powder compression forming dies, and comprises a sheath, support legs are fixedly mounted at the corners of the lower end of the sheath, a lower base plate is mounted at the upper end of the sheath, a positioning groove is formed in the middle of the lower base plate, and the lower base plate is connected with the positioning groove. A positioning groove is formed in the lower base plate, a special-shaped mold core is installed at the upper end of the positioning groove, the outer side wall of the special-shaped mold core is slidably connected with an upper cover plate, the upper cover plate is located above the lower base plate, a powder containing cavity is formed between the upper cover plate and the lower base plate, and a rubber plug is installed at the upper end of the upper cover plate; by means of the split design of the lower base plate and the special-shaped mold core, after isostatic pressing machining is completed, the special-shaped mold core and a lower base plate body are separated, a rotating handle is rotated, so that a threaded rod moves upwards, then the lower base plate moves upwards, finally, a shaped blank leaves the interior of the wrapping sleeve, and rapid demolding and discharging of the shaped blank are achieved.

The invention relates to the technical field of coal mining, in particular to a cage type resistance-increasing large-deformation anchor rod and a using method thereof. The anchor rod comprises an anchor rod body, a guide rod, a cage pipe and a limiting piece, the anchor rod body comprises an anchoring section located at the front end of the anchor rod body and a threaded section located at the tail end of the anchor rod body and connected with the anchoring section, and the threaded section is provided with threads. The radial size of the cage pipe is increased by pushing the first push key, so that expansion of the cage pipe is realized, the anchoring agent is anchored in a pressed state, hole wall cracks and cavities are tightly filled, the interface bonding strength of the anchor rod body and the anchoring agent and the interface bonding strength of the anchoring agent and the hole wall are greatly enhanced, three-body two-interface damage is reduced from the source, and the service life of the anchor rod body is prolonged. The bottleneck of traditional anchor rod anchoring force improvement is broken through. When the anchoring force reaches the limit, no matter whether the anchor rod body is separated from the anchoring agent or the anchoring agent is separated from the hole wall of the anchoring drill hole, the cage pipe can further expand in the radial direction along with the movement of the anchor rod body, the extrusion force between the cage pipe and the hole wall is continuously increased, extra axial resistance is provided, and sudden failure of a supporting system is avoided.

The utility model discloses a discontinuous type PBL connecting system with bent flanges. The discontinuous type PBL connecting system comprises a main beam, the steel plate connecting piece is vertically fixed on the upper surface of the main beam, and the length direction of the steel plate connecting piece is parallel to the upper surface of the main beam; the top of the steel plate connecting piece is provided with a plurality of bent flanges distributed at intervals in the length direction of the steel plate connecting piece, all the bent flanges are bent towards one side of the steel plate connecting piece in the thickness direction, and the adjacent bent flanges face the different sides of the steel plate connecting piece in the thickness direction. The concrete plate is fixed on the upper surface of the main beam, and the concrete plate is provided with a cast-in-place hole corresponding to the steel plate connecting piece; the steel plate connecting piece is located in the cast-in-place hole, and the cast-in-place hole forms a hole filling material wrapping the steel plate connecting piece through cast-in-place concrete. The connection system has better shear resistance.

The utility model particularly relates to a packing bag for grain preservation, which comprises a bag body with a seal at the top, the bag body is made of a first barrier coating, a paper base layer and a second barrier coating which are sequentially connected from inside to outside, the bag body comprises a bag body front piece and a bag body rear piece, the top of the bag body front piece and the top of the bag body rear piece are both provided with top tearing lines, and the top tearing lines are arranged on the top of the bag body front piece and the top of the bag body rear piece. The two top tearing lines are connected with each other and located below the sealing opening, middle tearing lines are arranged in the middle of the bag body front piece and the middle of the bag body rear piece, a bonding layer is further arranged on the bag body front piece or the bag body rear piece, the bonding layer is located below the middle tearing lines, grains are loaded into the bag body through the sealing opening, and the sealing opening is subjected to heat sealing treatment. When the packaging bag needs to be opened, the packaging bag is torn along the top tearing line to form an opening, and grains are taken out from the opening. The paper base layer has the characteristics of high mechanical strength, compact structure, flexibility and high heat resistance. The barrier coating is sprayed on the paper base layer, so that the paper base has waterproof, moistureproof, antioxidant, mildew-proof and antibacterial properties.