13 results about "Pressure resistance" patented technology

The invention discloses a longitudinal seal underwater optical cable, which comprises an optical unit, a reinforcing device and a waterproof sheath, wherein a waterproof and anticorrosive material is filled in intervals among the optical unit, the reinforcing device and the waterproof sheath; the reinforcing device comprises a central line and the optical unit reinforcing device comprising a plurality of reinforcing pieces with circular sections, the optical unit and the plurality of reinforcing pieces with circular sections are closely arranged around the central line in a concentric circle manner, and the waterproof and anticorrosive material is solid at normal temperature. Through utilizing the technical scheme disclosed by the invention, the optical unit is distributed between the reinforcing pieces to generate very high effect of side pressure resistance and water leakage resistance. The longitudinal seal underwater optical cable disclosed by the invention has the advantages of simple structure, small cable diameter, good longitudinal sealing performance and excellent resistances on corrosion, tension, pressure and the like, improved product quality and reliability of underwater optical cables and reduced manufacturing cost of the optical cable. The invention further discloses a manufacturing method of the longitudinal seal underwater optical cable.

The invention relates to a stainless metallic hose of weldless flanged connection and a manufacture method thereof. A spiral or omega-shaped bellows is enveloped with a stainless metal soft net and the end part of the bellows is rung with a travelling ring. The spiral or omega-shaped bellows, the stainless metal soft net and the travelling ring are welded and fixed. The flange is rung outside the bellows and is located between the travelling rings at the two ends, which can rotate automatically. The invention has the beneficial effects of simple structure, low cost, excellent pressure resistance, corrosion resistance, high temperature resistance and good flexibility. The loose flange connection makes the connection with the user pipeline convenient. The flexible connection improves the working efficiency. The high cost of the all stainless steel structure is avoided. The invention has the advantages of low cost, high reliability and broad application.

The invention discloses a waterway control valve unit, comprising a valve element suite, a diaphragm gland, and a shaft sleeve. The diaphragm gland is arranged on the valve element suite. The valve element suite is formed by a rubber diaphragm, a valve element main body, and a watertight rubber pad from top to bottom. The valve element main body is internally provided with a water inlet duct. The lower end of the valve element main body is provided with the watertight rubber pad in a clamping manner. The upper end of the valve element main body is provided with the rubber diaphragm in a clamping manner. A hydraulic pressure balance chamber is formed between the rubber diaphragm and the diaphragm gland. The diaphragm gland is internally provided with a diversion hole communicated with the hydraulic pressure balance chamber. The diaphragm gland is internally provided with a discharge hole which is isolated from the diversion hole. The diaphragm gland is internally provided with a decompression flow channel along the radial direction of the diaphragm gland. The shaft sleeve is sleeved on the rubber diaphragm. A flowing hole is arranged in the shaft sleeve. The waterway control valve unit also comprises a valve body used to install the valve element suite. After the waterway control valve unit is installed with a corresponding waterway control mechanism in a cooperative manner, water hammer vibration can be prevented, and pressure resistance is good, and service life of a product is long.

The invention provides a preparation method of a pH-responsive quick self-repairing collagen-based hydrogel with adhesivity, antibiosis and pressure resistance. The preparation method comprises the following steps: S1, weighing PEG 2000, 4-formylbenzoic acid and dimethylaminopyridine, dissolving in tetrahydrofuran, adding N, N'-dicyclohexylcarbodiimide in a nitrogen atmosphere, stirring, and then filtering to obtain a white solid; dissolving the white solid in tetrahydrofuran, precipitating in diethyl ether, drying to obtain DA-PEG, and dissolving in water to prepare a DA-PEG solution; S2, weighing and mixing a prepared collagen solution with a chitosan solution, wherein the mass ratio of the collagen solution to the chitosan solution is 3: 1-1: 3 to obtain a collagen/chitosan mixed solution; S3, adding a DA-PEG solution into the collagen/chitosan mixed solution under an ice bath condition to prepare a collagen/chitosan/DA-PEG mixed solution, adjusting the pH value to be 3.6-4.8, and uniformly mixing; and standing to obtain the pH-responsive quick self-repairing collagen-based hydrogel with adhesiveness, antibiosis and pressure resistance.

The invention relates to a PBT (polybutylene terephthalate) production technique. The technique comprises the following steps: carrying out liquid-phase tackifying on 1,4-butanediol, terephthalic acid and a catalyst to obtain PBT with the viscosity of 1.05-1.35 dL/g; in the liquid-phase tackifying process, adding a nucleating agent which accounts for 0.02-1 wt% of the raw materials, and uniformly mixing; and after the liquid-phase tackifying, adding a lubricant which accounts for 0.02-1 wt% of the raw materials, and uniformly mixing. In the liquid-phase tackifying process, 0.02-1 wt% of the nucleating agent is added and uniformly mixed, thereby having great effects on enhancing hardness and side pressure resistance; and after the liquid-phase tackifying, 0.02-1 wt% of the lubricant is added and uniformly mixed to enhance the surface smoothness of the loose tube, so that the pipe diameter is uniform and stable.

The invention discloses a repeated cycling type detachable macromolecule transferring pallet. The repeated cycling type detachable macromolecule transferring pallet comprises external clamping plates,inner connecting side plates, connecting plates, connecting assemblies, antiskid rubber pads and edge rubber pieces, wherein the inner connecting side plates are mounted at the inner sides of the outer clamping plates; the connecting assemblies are mounted at the outer sides of the connecting plates; the edge rubber pieces are adhered to the outer sides of the antiskid rubber pads. The repeated cycling type detachable macromolecule transferring pallet is scientific and reasonable in structure, and safe and convenient to use; the edge plates in the pallet can be fixedly connected and movably dismounted and mounted through the outer clamping plates; the pressure resistance and the deformation resistance of the inside of the pallet can be improved through the inner connecting edge plates; atransverse separating plate in the pallet can be conveniently assembled and disassembled through the connecting plates; the pallet and the edges of the edge plates can be conveniently fixedly mountedand movably dismounted through the connecting assemblies; a combined circular groove and a combined circular column of the pallet can be firmly combined through the antiskid rubber pads; the pallet and a bottom plate of the pallet can be greatly sealed through the edge rubber pieces.

The invention discloses a double-large-end drain trap, which comprises a pollution discharge pipe connector, a water storage height card, a ground buried pipe connector and a water storage depth card, wherein the inner circle calibers of the pollution discharge connector and the ground buried pipe connector are respectively greater than 110mm, so that the connector directions of the pollution discharge pipe connector and the ground buried pipe connector are respectively vertical to the ground, and the problems of negative pressure resistance incapability and easy occurrence of air backflow and connector leakage since the water storage depth of a sanitary appliance does not reach the standard are better solved.

The invention relates to a ball leather-simulated polymer decorative film. The decorative film consists of a substrate (1), a surface film (2) and a granular bulge (3) which is protruded out of the surface of the substrate and is packaged by the surface film. When the decorative film is applied to flame retarding, a flame retardant is added into the surface film, so that a flame retardant effect is improved and cost is reduced; after foaming and foam adsorption processes are used, protruded shapes of foams packaged by the surface film can be grasped artificially, so that three-dimensional appearance is improved; in addition, the foams inside and outside a base material are protected by the surface film, so that reinforced indexes such as abrasion resistance, scraping resistance, pressure resistance and the like of the ball leather-simulated polymer decorative film are ensured.

The invention relates to the technical field of pressure resistance testing devices, particularly to a coal mine single hydraulic prop pressure resistance testing device, which comprises a top rod, astand column, a rope tying column, a stop rod, an anti-skid seat and a bottom rod, wherein the top rod is fixed to the upper end of the stand column, the stop rod is fixed to the middle of the stand column, the bottom rod is fixed to the lower end of the stand column, the rope tying column is fixed to the stop rod, and the anti-skid seat is fixed to the bottom rod. According to the invention, thebottom end of the single hydraulic prop needing to be subjected to pressure measurement is placed in the anti-skid seat, the top end of the single hydraulic prop is clamped on the top rod after beinglifted, then a pressure resistance test is carried out, and a stable and firm frame platform is provided for the pressure resistance test of the single hydraulic prop for the coal mine through the arranged components such as the top rod, the stand column, the bottom rod and the like; through the arranged top rod, the single hydraulic prop is clamped on the top rod in the pressure resistance test period, so that the top end of the single hydraulic prop is prevented from sliding in the pressure resistance test period; through the arranged stop rod, the single hydraulic prop is prevented from toppling towards an operator in the pressure resistance test period; through the arranged rope tying column, the single hydraulic prop is tied, so that the single hydraulic prop is prevented from toppling left and right in the pressure resistance test period; and the bottom end of the single hydraulic prop is prevented from sliding in the pressure resistance test period through the arranged anti-skidseat.

The invention discloses a preparation process of an oil filler pipe. The preparation process comprises the steps: selecting materials, preparing a pipe in a molding manner, welding, cooling with water, expanding the pipe, trimming and grinding, detecting a weld, coating with alloy, warehousing, detecting and the like. According to the preparation process of the oil filler pipe, a steel pipe is molded for three times, the steel pipe is welded under the protection of gas, so that a steel plate is effectively machined into a round pipe by virtue of the combined operation, the damage to the steel plate caused by the one-step molding can be avoided, the resistance is improved, the steel pipe is ground and detected with an X ray and is subjected to water pressure, and the combined steps can comprehensively detect whether the steel pipe has a weld seam and whether the pressure resistance is qualified or not; and the preparation process is simple and capable of effectively improving the resistance and characteristics of the oil filler pipe.

The invention discloses a manufacturing method of a dovetail tenon joint wood structure square column for wood structure connection. The square column with a square cross section is equally divided into two sections, the upper section is an upper column mortise, and the lower section is a lower column tenon; the lower column tenon is cut into a lower column triangular tenon body (3) and a lower column dovetail tenon body (4); the upper column mortise is correspondingly cut into an upper column triangular mortise body (5) and an upper column dovetail mortise body (6), and the sizes of the mortise bodies correspond to the sizes of the tenon bodies; the peak line of the lower column triangular tenon body (3) is aligned with the short side line of the upper column dovetail mortise body (6), after the upper column triangular mortise body (5) slides in along the waist line of the lower column triangular tenon body (3), the peak of the lower column triangular tenon body (3) reaches the peak of the upper column triangular mortise body (5), and at the moment, the lower column dovetail tenon body (4) and the upper column dovetail mortise body (6) are completely connected. The square column is attractive in appearance and high in connecting strength, the pressure resistance of a wood structure is greatly improved, and the wood structure has good seismic performance as well in an earthquake.

The invention provides a scraper, which is used for a filter tank, wherein a rotating frame is arranged in the filter tank, and the rotating frame can rotate forwards around a first vertical axis to carry out plowing or reversely rotate around the first vertical axis to carry out plowing; the scraper is used for being connected to the rotating frame; when the scraper is connected to the rotating frame, the scraper extends along a second vertical axis and can rotate around the second vertical axis relative to the rotating frame; the scraper is a circular arc plate, and the convex surface of thescraper faces the peripheral wall of the filtering tank. The scraper at least has the following technical effects: (1) compared with a flat plate structure, the circular arc scraper can obviously increase the pressure resistance when discharging grains, and has higher strength; (2) the arc-shaped scraper can ensure that the distances between each point on the scraper and the first vertical axis are as equal as possible in the process of cultivating the grains, thereby avoiding the damage of the scraper to the grains layer in the process of cultivating the grains.

The present invention discloses an impact-resistant garden table. Both the table top and table legs are formed by structural layers and surface layers coated on the surfaces of the structural layers; each surface layer comprises the following raw materials in parts by weight: 100 parts of 52.5-grade quick-hardening low-basicity aluminate cement, 40-60 parts of colored sands, 3-5 parts of pigments, 4-6 parts of an acrylate emulsion, 1-3 parts of polyethylene ethanol, 1-3 parts of sodium lignin sulfonate, 4-6 parts of disodium methylene bisnaphthalene sulfonate, 1-2 parts of an acrylate copolymerization emulsion, 1-3 parts of polyvinyl acetate glue powder and 20-30 parts of water; each structural layer comprises the following raw materials in parts by weight: 100 parts of 52.5-grade quick-hardening low-basicity aluminate cement, 110-150 parts of yellow sands, 3-7 parts of roving, 4-6 parts of an acrylic emulsion, 2-3 parts of olyethylene ethanol, 2-4 parts of sodium lignin sulfonate, 3-6 parts of disodium methylene bisnaphthalene sulfonate, 3-4 parts of polyvinyl acetate glue powder and 30-50 parts of water. The impact-resistant garden table disclosed by the present invention has the performances of freezing resistance, pressure resistance, good plasticity, long service life and the like.