37results about How to "Avoid phenomena such as cracking" patented technology

The invention discloses a method and corresponding ceramic welding materials for restoring damaged high temperature industrial kiln by ceramic welding technology, and the method comprises the following steps of: selecting materials the same as or similar torefractory materials at the kiln damaged position as base materials; selectively adding metal inflammable microparticles accounting for 10% to18% by weight of the base materials, such as aluminium, magnesium, silicon, zirconium and the like, and selecting chloride accounting for no more than 2% by weight of the base materials as additive; after mixing well under conveying of oxygen jetting the prepared welding material to a position of the kiln to be repaired; reacting the inflammable microparticles with the oxygen to produce a high temperature to allow the refractory materials rapid softening and fusion; combining together very tightly the refractory materials at the position to be prepared and the welding material; fully filling holes, junctions and slits with fused substance; and continuously filling on the heat repairing surface to achieve the purpose of kiln restoration.

The invention belongs to the technical field of building materials and particularly relates to interface mortar with an ardealite-based hydraulicity composite cementing material as a cementing material. The interface mortar is composed of ardealite, a slag powder, coal ash, metakaolin, a copper tailing slag powder, red mud, ordinary Portland cement, aluminate cement, quartz sand, a quartz powder,chesterite, calcium bentonite, a polycarboxylate-type water reducing agent, cellulose ether and latex powder. By adopting the interface mortar, the binding property of a base wall and a heat preservation layer in a wall heat preservation system can be effectively improved, the peeling risk of the heat preservation layer of a building wall can be reduced, and environment security problems caused bypiling of industrial ardealite can be also solved. When the interface mortar is produced, a great amount of industrial solid wastes such as non-calcined ardealite, coal ash, copper tailing slag powder and red mud are used, so that the interface mortar has the outstanding advantages of being low in energy consumption, low in cost, low in emission, and the like. The interface mortar is applied to heat preservation systems of various building walls, and the like.

The invention relates to a living assisted article, and discloses a multifunctional foot washing and massaging device. The multifunctional foot washing and massaging device comprises a base and support legs arranged below the base, wherein the base is of a hollow shape and the surface of the base is symmetrically provided with pedal holes, pedal plates are respectively and symmetrically embedded into the two inner sides of the pedal hole, and the pedal plate is provided with a sole massage device; a support column is arranged below the base, and a bottom plate is arranged at the bottom of the base; the sole massage device comprises a toe scrubbing device, an arch massaging device and acupoint points, wherein the toe scrubbing device is arranged on the pedal plate, the arch massaging device is embedded in the pedal plate, the acupoint points are movably arranged below the pedal plate, and acupoint holes are correspondingly formed in the pedal plate. According to the multifunctional foot washing and massaging device provided by the invention, the problems met can be solved in the process of cleaning, nursing and drying the feet when a user is showering, and the user does not need to stoop down, therefore the aged, children, pregnant women and fat people can be effectively protected, and the danger of sliding in a bathroom can be prevented.

The invention provides building sealing glue. The building sealing glue is prepared from a component A, a component B and a component C, wherein the component A is prepared from the following components in parts by weight: 20 to 90 parts of epoxy resin, 3 to 40 parts of a plasticizer, 0.1 to 10 parts of a coupling agent, 0.1 to 10 parts of a thixotropic agent, 0.1 to 20 parts of hollow glass bead and 10 to 50 parts of filling; the component B is prepared from the following components in parts by weight: 20 to 90 parts of a curing agent, 0 to 8 parts of an accelerant, 0.1 to 10 parts of the thixotropic agent, 0 to 10 parts of the coupling agent, 0.1 to 20 parts of the hollow glass bead and 10 to 50 parts of the filling; the component C is prepared from the following components in parts by weight: 70 to 120 parts of quartz sand and 0.5 to 2 parts of carbon black. The building sealing glue provided by the invention has relatively suitable thermal expansion and cold contraction performance and has relatively good compatibility performance with a prefabricated part, so that phenomena that the building sealing glue is cracked and the like, caused by decoration, can be avoided.

The invention discloses a method for cutting a foaming cement board by means of a wet process. The method comprises the following steps: (1) mixing and stirring cement, pulverized fuel ash, reinforced fibers and an additive with water according to the proportion and performing mould pouring, foaming and standing to prepare the foaming cement board; (2) maintaining the foaming cement board for 20-30 minutes, performing mould removal and cutting the foaming cement board into required foaming cement boards with various specifications through a cutting device; and (3) performing surface treatment, package and film coating maintenance of the cut foaming cement boards for 14 days. When the strength of the foaming cement boards is low, the wet process cutting is performed, the amount of dust produced in the cutting process is reduced, the cutting efficiency is improved, and the product quality is improved greatly. The problems that large amount of hydration heat is produced in the foaming process of the foaming cement boards, caused cracks do not easily disperse, cutting size deviation is large when the strength of the foaming cement boards is high, and the like are solved. Accordingly, phenomena including leakage, cracks and the like of a foaming cement board outer wall external thermal insulation system caused by self size deviation, the cracks and other problems of the foaming cement boards are avoided.

The invention discloses a flow distribution sliding disc pair and a plunger pump or motor comprising the structure. The flow distribution sliding disc pair comprises swash discs and sliding discs supported on the swash discs, each sliding disc is of an integrated structure, the opposite end faces of the sliding discs and the swash discs are provided with static pressure bearing surfaces, the static pressure bearing surfaces are provided with a plurality of oil chambers, the end surfaces the other sides of the sliding discs are provided with a plurality of plunger ball sockets, and the slidingdiscs are provided with large-aperture oil passing holes for communicating the plunger ball sockets and the oil chambers; and the swash discs are provided with flow distribution oil grooves communicating with inlet and outlet ports, and the flow distribution oil grooves communicate with the inlet and outlet ports in the positions, close to the ends of one sides of the swash discs, on a shell of the plunger pump or motor. By means of the flow distribution sliding disc pair and the plunger pump or motor, flow distribution, variable inclination and the supporting function are integrated into theflow distribution sliding disc pair, the number of friction pairs is decreased, the influence of cylinder block overturning and oil pollution is reduced, the structure is greatly simplified, the workreliability and work pressure of the plunger pump or motor are improved, and the working life of the plunger pump or motor is prolonged.

The invention relates to a method for electrodepositing iron-nickel alloy plating on the surface of a carbon-based material and belongs to the technical field of surface treatment. The carbon-based material is subjected to heat treatment and ultrasonically cleaned, and thus a pretreated carbon-based material is obtained; an iron-nickel alloy electrodepositing solution is prepared; with the pretreated carbon-based material as a cathode, an iron-nickel alloy plate as an anode and the iron-nickel alloy electrodepositing solution serves as an electroplating solution, electrodepositing is conductedat 30-50 DEG C for 5-60 min through a direct-current power source; and the cathode is taken out, cleaned and dried, and thus the iron-nickel alloy plating is obtained. The iron-nickel alloy plating can be electroplated on the surface of the carbon-based material, the thermal expansion coefficient of the plating is close to that of the carbon-based material, micron-scale interface bonding is achieved between the plating and the carbon-based material, and tight interface bonding can be still kept after a heat cycle from the indoor temperature to the temperature of 800 DEG C.

The invention discloses special joint filling mortar for light partition wallboards. The special joint filling mortar comprises, by weight, 300-400 parts of cement, 100-140 parts of fly ash, 400-450 parts of fine sand, 30-60 parts of calcined gypsum powder, 2-10 parts of macromolecule xanthan gum powder, 1-10 parts of redispersible latex powder, 1-3 parts of starch ether, 1-3 parts of cellulose ether, 1-3 parts of set retarders, 40-60 parts of expansive agents, 2-8 parts of graphene oxide modified carbon fibers and 1-5 parts of water repellents. A mass ratio of the macromolecule xanthan gum powder to the redispersible latex powder is 2-7:1; an expansion coefficient of the calcined gypsum powder is 120-130, and a mass ratio of graphene oxide to carbon fibers is 0.05-0.1:1. The special jointfilling mortar for the light partition wallboards has the advantages that various components of the special joint filling mortar are selected, the weights of the various components are matched with one another, respective excellent properties of the various components are comprehensively utilized, the strength of the components is drawn, and accordingly the special joint filling mortar is high inbonding strength, tensile and compressive property and water retention rate and low in shrinkage.

The invention provides a fuel tank which comprises a barrel body (2) and an internal separator (1) positioned in the barrel body (2), wherein the internal separator (1) is provided with a main body part (8) and a connecting part (9), the periphery of the main body part (8) is bent to form the connecting part, and the barrel body (2) is fixedly connected with the connecting part (9) in a press-fitting manner. As the barrel body of the fuel tank provided by the invention is fixedly connected with the internal separator in the press-fitting manner, the internal separator can be firmly fixed on the barrel body, the phenomenon that the internal separator falls off in the use process of the fuel tank is avoided, the internal separator is guaranteed to powerfully support a fuel tank assembly, and the rigidity and strength of the fuel tank assembly are accordingly improved. The fuel tank assembly part with the structural characteristics, which undergoes a 12000 km real vehicle reliability test, indicates that the phenomena of deformation and cracking of the fuel tank, generated by the fuel tank assembly due to external force impact are effectively restrained, and the potential safety hazard is eliminated.

The invention relates to a shaping treatment method for a molded packaging product after drying and setting. A machining device comprises a bottom plate, a lower template and a heat setting device; and the lower template is mounted in the middle of the upper end of the bottom plate, the heat setting device is arranged above the lower template, and the lower end of the heat setting device is mounted on the bottom plate. According to the method, the problems that when an existing device is used for shaping molded packaging products after drying and setting, the using effect is generally poor, and different devices need to be replaced when different molded packaging products are machined, so that the machining cost of the molded packaging products is high, and when the molded packaging products are heated and set, the setting effect is poor, positioning is inaccurate, the molded packaging products are prone to deformation, meanwhile, setting equipment cannot only heat a used mold, the heat utilization rate is low, and heat dissipation is fast are solved.

The invention provides a shock absorber for a rotational joint and a shock absorption method of the shock absorber. The shock absorber comprises a driving hub and a driven connecting part, and the driving hub is connected with the driven connecting part through at least one strip-shaped plate spring capable of being bent in the circumferential direction of the driving hub. When the plurality of strip-shaped plate springs are arranged, the strip-shaped plate springs are arranged in the circumferential direction of the driving hub at equal intervals, for one thing, the characteristic that the strip-shaped plate springs can elastically deform in the circumferential direction is utilized, when the driven connecting part is impacted, the strip-shaped plate springs deform and absorb vibration and impact energy, for another thing, the characteristic that the rigidity of the strip-shaped plate springs is large is utilized, when the driving hub rotates forwards or reversely to drive the driven connecting part to rotate through the strip-shaped plate springs, the deformation of the strip-shaped plate springs is relatively small, and then the rotation error of the rotational joint can be fully reduced; and when the plurality of strip-shaped plate springs are arranged, the strip-shaped plate springs are arranged in the circumferential direction of the driving hub at equal intervals, and the shock absorption uniformity between the driving hub and the driven connecting part is further guaranteed.

The invention discloses a magnesium oxide whisker/montmorillonite modified denture resin base material and a preparation method thereof. After montmorillonite is pretreated, the crystal layer spacingis increased; then the montmorillonite is further modified by using modified magnesium oxide whisker; the modified magnesium oxide whisker and organic molecules enter a part between montmorillonite layers by using the ion exchange action, so that the interlamellar spacing of the montmorillonite is enlarged. The montmorillonite is enabled to be fully and uniformly dispersed in a resin matrix; the physical property of a composite material is enhanced and the condition of local stress imbalance is avoided; meanwhile, the phenomena of denture matrix cracking and the like due to stress imbalance are avoided, so that the service life of a denture matrix is prolonged.

The invention discloses an anti-bending halogen-free flame-retardant sheath material for an elevator flat cable as well as a preparation method and application of the anti-bending halogen-free flame-retardant sheath material. The anti-bending halogen-free flame-retardant sheath material comprises the following raw materials: ethylene-propylene-diene monomer, a compatilizer, a flame retardant, a lubricant and an antioxidant, the ethylene content of the ethylene-propylene-diene monomer is 65-75%, the oil charge ratio is greater than or equal to 40 phr, and the Mooney viscosity is 40-75. The sheath material further comprises linear low density polyethylene, an initiator and a silane coupling agent. The sheath material is prepared by partially or completely grafting the linear low density polyethylene and the ethylene propylene diene monomer with the silane coupling agent under the action of the initiator before extrusion, and then conducting blending and extruding with other raw materials, or is prepared by subjecting all the materials in the raw materials to mixing, banburying and reaction and then conducting extruding. A sheath for the elevator flat cable prepared from the sheath material is simple in material formula, easy to process and low in cost, and particularly has excellent wear resistance, halogen-free flame retardance, high and low temperature resistance, excellent flexibility, excellent mechanical property and the like.

The invention discloses a hoisting structure of a UHPC short rib precast slab, which comprises a UHPC short rib precast slab, a plurality of internal thread hoisting connecting devices are symmetrically embedded in the upper plane of the UHPC short rib precast slab with the central axis as the symmetry axis, and a rigid hanging bracket is arranged on the upper plane of the UHPC short rib precast slab and tightly attached to the UHPC short rib precast slab. The rigid hanging bracket is connected with the UHPC short rib precast slab into a whole after being connected with the internal thread hoisting connecting device through the connecting rod, and hoisting equipment hooks the rigid hanging bracket to hoist the UHPC short rib precast slab. According to the hoisting structure of the UHPC short rib precast slab, the cross arm, the screw rod and the internal thread hoisting connecting device pre-buried in the UHPC short rib precast slab are closely connected between the rigid hanging bracket and the UHPC short rib precast slab, and the rigid hanging bracket and the UHPC short rib precast slab are connected into a whole, so that the rigidity of the UHPC short rib precast slab is enhanced; and the phenomena of difficult demolding, cracking of the bottom of the prefabricated slab and the like caused by too large deformation of the UHPC short rib prefabricated slab in the hoisting process are avoided.

The sliding disc type axial plunger pump comprises a flow distribution sliding disc pair, a plunger pair and a flow distribution pair, the flow distribution sliding disc pair comprises a swash plate and a sliding disc supported on the swash plate, the sliding disc is of an integral structure, kidney-shaped holes communicated with center holes of plungers are formed in the sliding disc, and the plunger pairs are arranged in the kidney-shaped holes. A low-pressure oil distribution hole serving as an oil inlet channel is formed in the portion, opposite to the low-pressure plunger hole, of the swash plate supporting face, static pressure supporting is formed by the portion, opposite to the high-pressure plunger hole, of the swash plate supporting face and a kidney-shaped hole of the sliding plate, and the low-pressure oil distribution hole is communicated with a shell cavity through an oil inlet groove formed in the swash plate. Low-pressure oil enters a plunger hole of the cylinder body from a low-pressure flow distribution opening and an oil inlet groove or a groove-shaped low-pressure opening of the swash plate in a double-way mode, high-pressure oil is discharged from a high-pressure flow distribution opening of the flow distribution plate or a groove-shaped high-pressure opening of the swash plate in a single-way mode, and suction and discharge of hydraulic oil are achieved. The axial stress of the bearing can be further reduced, the stress working condition of the bearing is improved, the self-suction capacity is improved, the oil temperature is reduced, the working reliability of the plunger pump is improved, and the working life of the plunger pump is prolonged.