44results about How to "Eliminates the risk of cracking" patented technology

The invention relates to a method of producing a laminated packaging material including a core layer of paper or paperboard and a barrier layer applied on one side of the core layer. The invention also relates to a laminated packaging material produced according to the method, as well as a packaging container which is produced from the laminated packaging material.

A method for producing a chassis link includes shaping a single-shell main body from a sheet metal blank and deforming the sheet metal blank by deep drawing, which includes pre-drawing during which an indentation is produced on the main body and in which the indentation is trimmed and a bush is attached to a projection on the main body once the indentation has been trimmed. The sheet metal blank is pre-drawn such that the indentation is given a radius that matches the bush to be attached such that there is no further need for a further forming operation on the indentation once the indentation has been trimmed.

The invention provides a method for manufacturing sheet-shaped packaging materials. The method comprises the following steps: expanding a paper core layer and punching an opening hole, wherein a fiber direction of the paper core layer extends along the length direction; printing a printing layer on the outer surface of the paper core layer; extending a pattern and character direction of the printing layer along the width direction of the paper core layer; extruding and laminating a thermoplastic material on the printing layer to form an outermost layer; extruding and laminating a thermoplastic material on the inner side face of the core layer to form an intermediate layer; compounding a barrier layer on the inner side face of the core layer by the intermediate layer; extruding and laminating a thermoplastic material on an aluminum foil layer to form a binding agent layer; extruding and laminating a thermoplastic material on the binding agent layer to form an innermost layer; pressing a vertical fold line, a transverse fold line and an inclined fold line on one side of the outermost layer; and slitting a continuous packaging material of the plurality of sheet-shaped packaging materials to form the single-sheet packaging materials. The packaging materials can have a relatively good fold line effect by using relatively small pressure when the fold lines are pressed.

The invention provides a water supply system of a railway vehicle, which comprises a water tank, a water pumping device, water consumption equipment, a control module and a middle water tank. The water tank is arranged below an underframe of a vehicle body, the water consumption equipment is disposed above the underframe of the vehicle body, the middle water tank is positioned above the water consumption equipment, an acquisition device is disposed in the middle water tank, a water outlet pipe of the water tank is communicated with the water pumping device while the other end of the water tank is communicated with the middle water tank via a water supply pipeline, a check valve which is used for preventing water in the middle water tank from flowing back to the water pumping device is arranged on the water supply pipeline, a distributing pipeline which is used for supplying water for the water consumption equipment is disposed on the water supply pipeline, the tail end of the distributing pipeline is connected with a drain pipe, and the control module is respectively connected with the acquisition device and the water pumping device, so that the water pumping device is started when an acquired liquid level signal value is lower than a preset value and then closed after a preset time. The water supply system of the railway vehicle has the advantages that leakage of the pipeline due to excessive pressure of the system is prevented, hidden dangers of bursting of the pipeline due to excessive water injection when a pressure sensor fails are eliminated, and operational reliability of the system is improved.

The invention specifically relates to a reverse operating construction method for pouring a monolithic track bed in a separated tunnel of a metro section, and solves the problems of slow constructionprogress, easiness in cracking of concrete of the track bed, serious pollution at the construction site, high labour intensity and high costs in pouring of the monolithic track bed in the separated tunnel of the metro section currently. The reverse operating construction method comprises: a, assembling a track skeleton and pushing the track skeleton to a track-laying operation surface; b, beddingsand pillows and paving the track skeleton in place; c, longitudinally firmly connecting the joint of two rail; d, manufacturing a rail-mounted concrete pump pipe bracket; e, manufacturing a rail-mounted concrete three-point material-deployment funnel; f, performing segment-by-segment track lifting from the distal end of the tunnel, then adjusting the spatial position, and arranging a downhill ramp; g, pushing the rail-mounted concrete pump pipe bracket and the rail-mounted concrete three-point material-deployment funnel to a track bed pouring area; and h, performing precise concrete materialdeployment and pouring on the track bed by manually controlling the positions of an arc material-deployment chute and a discharge port. The reverse operating construction method avoids the quality problem of track bed cracking inducted by the fact that the track bed bears loads too early.

The invention discloses a system reinforcing method for a steel plate combined continuous beam. The system reinforcing method comprises the steps that a temporary support is erected near a bending moment zero point of the combined beam; secondly, the composite beam is jacked for the first time, a support system on a cover beam of the middle pier is removed, and damaged concrete of a bridge deck ina hogging moment area of the top of the middle pier is chiseled away; then, secondary jacking is conducted, a prefabricated channel beam is hoisted to be installed on the middle pier cover beam, andthe upper flange of the prefabricated channel beam is connected with the lower flange of an H-shaped beam in a welded mode; meanwhile, longitudinal ribs and vertical ribs are implanted into the middlepier cover beam, and studs are welded to the inner side of a steel web of the H-shaped beam; finally, concrete is poured, the temporary support is dismantled, and construction is completed. On one hand, the bearing capacity and torsional distortion resistance of the steel plate combined continuous beam can be greatly improved, on the other hand, the problem of bridge deck slab cracking in the hogging moment area of the steel plate combined continuous beam can be effectively solved, and the purpose of reinforcing an existing steel plate combined continuous beam system is achieved.

The invention discloses a welding-free pin shaft and a stop device. The limit of the rotary motion of the pin shaft is realized through the matching of a stop block and the pin shaft, and the effect of limiting the axial movement of the pin shaft is achieved by utilizing the buckling between an annular groove in the pin shaft and left and right stop rings. According to the welding-free pin shaft and the stop device, hole punching in a shaft end surface and a base body part is avoided through assembling, and cracking risks caused by welding are thoroughly avoided; and all components are simple in structure, the overall structure is compact, the occupied space is small, the pin shaft is easy and convenient to disassemble and assemble, and the application range is wide.

The invention discloses a reinforcing steel bar applicable to concrete, which comprises a reinforcing steel bar body and a plurality of cross ribs. The maximum size of the cross section of the reinforcing steel bar body is d, the maximum size of each cross rib projected from the reinforcing steel bar body is h, the width of the top of each cross rib projected from the reinforcing steel bar body is defined as rib top width b, and the distance between each two adjacent cross ribs in the length direction of the reinforcing steel bar body is defined as rib spacing L; the cross ribs are divided into two groups, which are respectively arranged on both sides of the reinforcing steel bar body; the parts, which are between the two groups of cross ribs, of the cross section of the reinforcing steel bar body are smooth curves or/and straight lines; the value range of the maximum size h of each cross rib projected from the reinforcing steel bar body is between 0.08d and 0.2d; the value range of the rib top width b is between 0.05d and 0.15d; and the value range of the rib spacing L is between 0.3d and 3d. The reinforcing steel bar applicable to concrete has the following advantages: by improving the shape and size parameters of the reinforcing steel bar, the reinforcing steel bar body has a smooth external profile, a structure which has the risk of cracking is eliminated when the reinforcing steel bar is combined with concrete, and thereby the degree of firmness of reinforced concrete formed by the reinforcing steel bar is increased.

A roof boarding of light weight, high strength and fireproof is provided, which belongs to the technology field of building material. The roof boarding comprises a boarding body, boarding holes provided at intervals in the interlayer in a length direction of the boarding body and at least one layer of net cloth combining with the upper and the lower surfaces of the boarding body. The roof boarding is characterized in that non-metal reinforcing bars used for increasing the strength of the boarding body are further arranged in the interlayer in the length direction of the boarding body. The roof boarding has the advantage that the non-metal reinforcing bars used for increasing the strength of the boarding body are added in the interlayer in the length direction of the boarding body, thereby avoiding cracking when in use.

The invention relate to a reinforcing structure for a cracked steel bridge panel. According to the technical scheme, the reinforcing structure for the cracked steel bridge panel comprises the crackedsteel bridge panel, carbon fiber reinforcing battens, metal reinforcing battens, shear connecting parts, steel fabrics, an ultra-high performance concrete layer and a wearing layer, wherein the carbonfiber reinforcing battens are bonded to the cracked steel panel through organic structural adhesives; the shear connecting parts are welded to the metal reinforcing battens; the metal reinforcing battens with the shear connecting parts are directly welded or cemented on the cracked steel bridge panel, and alternately arranged with the carbon fiber reinforcing battens in parallel; and the steel fabrics are placed on the cracked steel bridge panel, the steel fabrics are composed of longitudinal steel bars and transverse steel bars, the longitudinal steel bars and the transverse steel bars are crisscrossed, the ultra-high performance concrete layer is arranged on the cracked steel bridge panel in a pouring mode, the carbon fiber reinforcing battens, the metal reinforcing battens, the shear connecting parts and the steel fabrics are covered with the ultra-high performance concrete layer, the ultra-high performance concrete layer is connected with the cracked steel bridge panel, and the ultra-high performance concrete layer is covered with the wearing layer.

The invention discloses a steel bar suitable for concrete, which comprises a steel bar body and several transverse ribs, the transverse ribs protrude from the steel bar body, the maximum dimension of the cross section of the steel bar body is d, and the maximum dimension of the transverse rib protruding from the steel bar body is h, the width of the top of the transverse rib protruding from the steel bar body is defined as the rib top width b, and the distance between two adjacent transverse ribs in the length direction of the steel bar body is defined as the rib spacing L; the transverse ribs are divided into two groups , respectively set on both sides of the steel bar body; the cross section of the steel bar body is a smooth curve or \ and straight line between the two sets of transverse ribs; the value range of the maximum dimension of the transverse rib protruding from the steel bar body is 0.08 d to 0.2d; the range of rib top width b is 0.05d to 0.15d. The benefit of the present invention is that by improving the shape and size parameters of the steel bar, the steel bar body has a relatively smooth outer contour, eliminating the structure with the risk of cracking when combined with concrete, thereby improving the firmness of the reinforced concrete made of steel bars.

The invention relates to the technical field of vehicle power device accessories, in particular to a new energy commercial vehicle power battery water retaining cover. The water retaining cover for the power battery of the new energy commercial vehicle comprises two buffer frames arranged at an interval, bolts, a water-based damping coating and a side top water retaining cover; wherein at least two bolt holes are formed in each of the two buffer frames which are arranged at an interval; the bolts with the same number as the bolt holes are used for fixing the buffer frame to the battery frame; the water-based damping coating is used for being sprayed to the joint where the buffer frame and the battery frame are fixed through bolts; the shape of the side top water retaining cover is matched with that of the buffering frames, and the side top water retaining cover is arranged on the outer sides of the two buffering frames and used for retaining water. According to the scheme, the problem that in the prior art, a rain baffle is directly arranged on the outer side of the battery frame, and the rain baffle and the battery frame resonate together and are torn due to vibration can be solved.

The invention relates to a method for supporting an integral arch body of an underground roadway, and provides the method for supporting the integral arch body of the underground roadway with high-strength anchor rods, specially-made U-shaped hooks and meshes, which is mainly suitable for areas with poor rock conditions, such as underground side part retreat ways, air inlet and return ways and the like. The supporting effect of the top slope of the roadway with the broken and poor rock conditions can be effectively improved, and the safe production environment of a mining area is improved.

The invention provides a liquid tank truck and an anti-wave plate assembly thereof, and relates to the technical field of liquid tank transport vehicles. The anti-wave plate assembly is transversely mounted inside a tank body of the liquid tank truck, and the anti-wave plate assembly comprises connecting structures and an anti-wave plate substrate. Each connecting structure comprises a connectingmain body and an extension piece integrally formed on the connecting main body. The connecting main body is in an arc shape and comprises an outer convex part and an inner concave part, wherein the outer convex part and the inner concave part are positioned on the two sides. The outer convex part is attached to the inner wall of the tank body in a surrounding manner along the surface extending with the arc contour of the outer convex part. The extension piece comprises an integrally formed base part extending from the inner concave part and a connecting part extending from the end of the basepart in a bending manner. The connecting part is correspondingly connected with the periphery of the anti-wave plate substrate, so that the anti-wave plate substrate is fixedly connected with the inner wall of the tank body. The anti-wave plate assembly is simple in structure and high in strength; and the anti-wave plate assembly has the advantages of being capable of supporting the whole tank body and buffering the liquid wave impact in the tank.