47results about How to "Meet the needs of safe production" patented technology

The invention aims to provide a wireless multi-hop ad hoc network communication method, which comprises the steps of network establishment and maintenance, and service transmission. The network establishment and maintenance comprises the following steps of: finding of neighbors; adding and deletion mechanisms of the neighbors; and establishment and maintenance of a route, in which the interaction of neighbor information among network nodes ensures that each network node finally possesses a topology table of whole network connection relationship, then a main operation node of the network nodes is used to calculate the route of the whole network according to the topology table and notifies other network nodes in the network of routing information in an information interaction mode at the same time, and the topology table and a routing list respectively saved by each network node are kept consistent to finish the establish of the network when the network is finally steady. The service transmission comprises the following steps of: search of an access point, link application, link establishment, service transmission and link demolition. A self-developed wireless multi-hop ad hoc relay network of the invention can finish the communication in tunnels or on occasions with similar characteristics.

The invention discloses a fast-curing indentation-proof water-based paint for galvanized sheets. A formula of the paint comprises the following components by weight: 30-45% of water-based resin, 1-3% of a dispersant, 20-35% of a pigment filler, 0.3-1% of a wetting leveling agent, 0.5-1% of a thixotropic agent, 0.3-1% of a defoaming agent, 0.1-0.8% of a flash rust inhibitor, 1-3% of a coalescing agent, 0.1-0.5% of a pH regulator and 10-40% of deionized water. The invention also discloses a preparation method of the water-based paint. The paint film provided by the invention can cure fast, and is safe, energy-saving, environment-friendly and simple for construction, so as to meet the fast production requirements of an assembly line. The obtained galvanized sheet has excellent properties and performance indicators reaching the industrial standard for galvanized sheet coating.

The invention discloses a facility and process for stably supporting a steeply inclined mining roadway surrounding rock. A roadway cross section of a mining roadway is an inclined wall arch, the portion above the mining roadway is an arch apex, a top plate is an inclined wall, a base plate is an arched reverse bottom, and a roadway bottom surface is located below the arch apex and is divided into a next section coal seam and a flat bottom. The supporting facility comprises an anchor net support formed by anchor rods, anchor cables, steel belts and metal nets and a closed guniting layer on the surface of the roadway. The supporting process comprises the steps of anchor net installation and concrete spraying on the surface of the roadway. For repeated coal-mining affecting gob-side mining roadway, the process utilizes the high-strength anchor rods and the anchor cables, combines with the W-shaped steel belts and the metal nets, then combines with an asymmetrical multi-medium coupled supporting mode for the concrete sprayed on the surface of the roadway and can effectively control roadway deformation, and safe production of the roadway is achieved. The total reserves of steeply inclined coal seams in domestic reserves are 15%-20%, a foundation is laid for coal seam roadway supporting by adopting the process, and the popularization prospect is wide.

The composition of flame retardant oil-base paraffin removing and inhibiting agent for paraffin control and removal in oil field contains light oil 10-20 portions, mixed benzene 70-95 portions, methyl alcohol 0.1-5 portions, water 0.1-1 portion, Peregal 1-5 portions and fluorosurfactant 10 to the minus third-10 to the minus fifth portion. Said paraffin removing and inhibiting agent can be formed into a spread water film on the oil surface, and so that the contact of oil with air can be completely cut off. Said paraffin removing and inhibiting agent can not be burned.

The invention discloses a hoisting device of an engine oil cooler. The hoisting device comprises a connecting rod, a rotating shaft, a limiting mechanism and a suspension loop mechanism, wherein the connecting rod comprises a horizontal section and a vertical section, a balancing weight is arranged at the tail end of the horizontal section, and a rotating sleeve is arranged at the bottom end of the vertical section; one end of the rotating shaft is inserted into the rotating sleeve, the rotating shaft and the horizontal section are arranged in parallel, round pins are inserted into the rotating shaft, and the to-be-hoisted engine oil cooler is attached to one side of the rotating shaft by sleeving the round pins; the limiting mechanism is used for limiting the rotation of the rotating shaft in a range of 180 degrees, and comprises a limiting seat and a limiting rod, the limiting seat is fixed at the lower end of the rotating sleeve and protrudes out to the rotating shaft, two limiting bolts are arranged in parallel on the limiting seat and are positioned on two sides below the rotating shaft respectively, and the limiting rod is inserted into a side wall of the rotating shaft and is used for being propped against the limiting bolts when the rotating shaft is rotated; the suspension loop mechanism is movably arranged on the horizontal section. The device is used for hoisting reliable, and the labor intensity is reduced.

The invention discloses an annular layout for producing tubular piles. The annular layout has the structure that a workshop is separated into a left region and a right region, wherein the left region is orderly separated into a front cloth region, a centrifuging region and a steaming and curing region from front to back; the right region is orderly separated into a form stripping region and a front cloth region from front to back; and the form stripping region and the front cloth region are distributed at two ends of the right region. The invention improves the traditional production layout, separates the original production workshop operation mode, prevents personnel in the original workshop from avoiding cranes, and reduces the labor intensity of the personnel. In addition, the invention reduces the overall temperature of the workshop, improves the working environment of the personnel, beneficially reduces the work of the personnel in hot days in summer, reduces the work load, enhances the safety and further satisfies the demands for safe production.

The invention discloses a refining method for preparing polymerization-grade propylene from refinery crude propylene. The refinery crude propylene is enabled to be subjected to the following steps sequentially: (1) carrying out dehydration, H2S removal and CO2 removal by using a solid caustic soda tower; (2) then, feeding the refinery crude propylene to a desulfuration mechanism for COS removal and H2S removal; (3) removing light components including CO and O2 by using a light component removing tower; (4) then, feeding the light component removed propylene to a molecular sieve for dehydration; (5) then, carrying out treatment with a methanol removal bed which is provided with an upper bed layer and a lower bed layer: enabling the propylene to enter the methanol removal bed from the lower part of the methanol removal bed and to be subjected to dehydration and methanol removal by a Selexsorb CD catalyst of the lower bed layer; enabling the methanol removed qualified propylene to continue to be subjected to CO2 removal by a Selexsorb COS catalyst of the upper bed layer until the propylene is qualified; and (6) feeding the propylene to an arsenic removal tank for arsenic removal. According to the refining method disclosed by the invention, the flow design is unique, the energy consumption is low, the refinery crude propylene can be subjected to complete refining and separating so as to obtain high-purity refined propylene, and the requirements of a continuous-method polypropylene process can be fully met.

The invention discloses a limited space operation safety intelligent early warning system, which comprises a gas data edge calculation module, a gas risk assessment module, a man-machine interaction module and a 5G base station transmission module, and is characterized in that the system uses the gas data edge calculation module to collect data of a limited space and transmits the data to edge calculation equipment through the Internet; a gas risk assessment module in the edge computing device utilizes a prediction algorithm to mine and analyze the collected data to obtain different risks, the risks are displayed by utilizing a man-machine interaction module, and meanwhile, the risks are informed to workers and managers through a 5G base station transmission module. The system provided by the invention can assess various gas risks, ensures the accuracy of assessment, can timely and effectively identify and control the risks by combining edge computing equipment and an algorithm, timely gives an alarm at the early stage of risk generation, and really realizes risk pre-control, thereby meeting the safety production requirements of limited space operation.

The invention belongs to a filling method of a stationary bike hollow flywheel counter weight filler. After being spliced, a hollow flywheel shell is placed on a rotary disk of a special filling machine for fixing; the filler with a certain proportion and a certain granularity is filled into a shell cavity through a central cover hole of a hollow flywheel shell which is in high-speed rotation; the whole inner cavity of the flywheel shell can be tamped and filled fully by the filler under a centrifugal action; after the hollow flywheel shell is fully filled by the filler, a shaft cover is pressed into the central cover hole of the hollow flywheel shell; finally the shaft cover and the shell are welded and fixed together; and as the stationary bike hollow flywheel adopts a bran-new counter weight filling technology, the problems in the prior art that the counter weight is not uniform, filling process is complex, waste and unqualified products are easy to generate, production efficiency is low and cost is high are solved.

The invention discloses a 5G + CMFT-R time domain electromagnetic field exploration system and method, and is suitable for detection and control of roof water damage in the coal mining process. In view of the characteristics of coal seam roof thickness, complex ground surface and the like in northwest regions of China, aiming at the defects of the existing ground and underground transient electromagnetic detection method, the invention adopts a transmitting coil to surround a coal face to implement primary electromagnetic field transmission, and an underground signal transmission system and aground signal acquisition system are connected to finish the same-frequency synchronization of receiving and transmitting; and a ground receiving coil receives the secondary electromagnetic field point by point according to the measurement network arrangement. And the acquired current and voltage data are converted into apparent resistivity data so as to acquire apparent resistivity images of different layers and carry out anomaly interpretation. The method can give full play to the detection advantages of the transient electromagnetic method in the northwest coal mine area, obtains a higher-precision detection result at a lower cost, can accurately judge the spatial position of the water-rich area of the coal seam roof, and provides reliable technical parameters for safe and efficient production of a coal mine.

The invention discloses SY15MnNiCrMoVNbTi steel. The SY15MnNiCrMoVNbTi steel consists of the following components in percents by mass: 0.16-0.20 of C, 0.20-0.50 of Si, 1.40-1.60 of Mn, smaller than or equal to 0.025 of P, smaller than or equal to 0.025 of S, 1.00-1.20 of Cr, 0.40-0.60 of Mo, 1.30-1.50 of Ni, 0.05-0.10 of V, 0.03-0.06 of Nb, 0.02-0.20 of Ti, smaller than or equal to 0.006 of B and the balance of Fe, wherein the sum is 100%. The invention further discloses a preparing method of the structural component of the SY15MnNiCrMoVNbTi steel. The material and the steel structural component reach mechanical performance meeting design requirements through adjusting alloy elements and adopting a reasonable thermal treatment technology, so that the requirement on the work environment in which the steel structural component is positioned is met; and the performance indexes of the steel structural component, such as strength, rigidity, stability, cold and hot processing moldability and weldability, are improved, and the service life of the steel structural component is prolonged.

The invention discloses a gas extraction negative-pressure pipeline leakage detecting device and method. The pipeline leakage detecting device comprises a distributed optical fiber sensor, a first-endcoupler, a Faraday rotation mirror, a photoelectric signal detection system and a computer signal processing system. The distributed optical fiber sensor is arranged in a gas extraction negative-pressure pipeline. The Faraday rotation mirror is arranged at the tail end of the distributed optical fiber sensor. The first-end coupler is arranged at the front end of the distributed optical fiber sensor and connected with the photoelectric signal detection system, and the photoelectric signal detection system is connected with the computer signal processing system. According to the pipeline leakage detecting device, through photoelectric signal conversion and signal optimization treatment, whether leakage happens in the gas extraction negative-pressure pipeline or not can be detected in time,the leakage point can be accurately positioned, a leakage detection system is high in safety index and good in stability performance, and the detection efficiency and the positioning precision are greatly improved.

The invention belongs to the technical field of coal mining, and particularly relates to a coal bunker support and a construction process thereof. The coal bunker support comprises a coal bunker and a support, wherein the coal bunker comprises a coal bunker cover plate, a coal bunker body, a coal bunker hopper and a loading chamber, wherein the coal bunker cover plate is arranged at the top of the coal bunker body, the coal bunker hopper is arranged at the bottom of the coal bunker body, the loading chamber is arranged below the coal bunker body, the coal bunker body is provided with an anchor net spraying support, the coal bunker hopper is provided with a track support, and the loading chamber is provided with an anchor net spraying and metal shed support. The construction process comprises the following steps of (1), performing coal bunker body construction; (2), performing coal bunker funnel construction; (3), performing loading chamber construction; and (4), performing coal bunker cover plate construction. According to the construction process, the support cost is reduced, operation is easy, the construction period is greatly shortened, the obtained coal bunker support is good in use effect, the bunker body strength, the coal bunker funnel section strength, the loading chamber deformation and other aspects can meet the safety production requirement, the strength is greatly improved, and the service life of the support is met.

The invention relates to a polyolefin catalyst prepolymerization solvent or a catalyst preparation solvent, which are applicable to a process for producing polyolefin and a process for preparing a catalyst of the polyolefin in the petrochemical industry. The invention discloses a novel mixed light alkane catalyst prepolymerization solvent or a catalyst preparation solvent which is prepared by utilizing C4-C5 straight-chain paraffin and an isomer thereof, taking butane, iso-butane, iso-pentane, n-pentane and cyclopentane as main ingredients, and limiting the concentration of the C4-C5 straight-chain paraffin and the isomer thereof. The two following conditions are needed to be met simultaneously when the solvent is prepared: the mass concentration of the butane and an isomeride of the butane is not more than 40 percent; and the mass concentration of pentane and an isomeride of the pentane is not less than 50 percent. The solvent has low viscosity and stable chemical properties, is easy to volatilize, and is used for substituting the traditional high-boiling-point or high-viscosity polyolefin prepolymerization solvent and catalyst preparation solvent in the prepolymerization process of catalysts in the polyolefin industry.

The invention discloses a large fan welding positioning tooling and a corresponding large fan welding positioning method. The tooling comprises a tooling platform, a shell positioning component and aflange positioning component, wherein the shell positioning component is used for realizing circle supporting and positioning on a fan shell, and the flange positioning component is used for placing and positioning a flange; and the shell positioning component and the flange positioning component are both arranged on the tooling platform, the shell positioning component is arranged at the centralposition of the tooling platform, and the flange positioning component is movably arranged on the peripheral side of the shell positioning component. According to the positioning tooling and the positioning method, the size and the deformation degree of the fan shell and the flange are effectively controlled in the welding process of the large fan, the product error caused by inaccurate welding between the fan shell and the flange is reduced, the concentricity problem and the distortion deformation problem of the fan shell and the flange are remarkably reduced, and the production efficiency ofprocessing enterprises and the qualification rate of the products are improved.

A temperature control system for an exothermic reaction process comprises a driving pump, a first heat exchanger, a second heat exchanger and a flow controller, wherein a cooling medium inlet of the first heat exchanger is connected with an outlet of the driving pump through a pipeline, a cooling medium outlet is connected with a cooled medium inlet of the second heat exchanger through the pipeline, a cooled medium outlet of the second heat exchanger is connected with an inlet of the driving pump through the pipeline to form a closed circulation line; the flow controller is connected on the closed circulation line in series; the temperature control system also comprises an emergency bypass pipeline or a pressure type overflow valve, a upstream end of the emergency bypass pipeline is connected with an inlet of the flow controller in parallel, a downstream end of the emergency bypass pipeline is connected with an outlet of the flow controller in parallel, the flow area of the emergency bypass pipeline is 1/9-1/2 of the flow area of the flow controller, an inlet of the pressure type overflow valve is connected with an inlet of the flow controller in parallel, and the outlet is connected in parallel with the outlet of the flow controller. The temperature control system disclosed by the invention is simple in structure and high in reliability, and effectively meets the requirementof safe production in the exothermic reaction process.

The invention discloses a method and structure for preventing mud from blocking a radar level gauge detection probe. According to the method, a mounting hole which is arranged on the top of a red mud storage tank is enlarged to be more than three times of the diameter of the radar level gauge detection probe, a guide pipe which is 1.5 times of the length of the radar level gauge detection probe is welded to the mounting hole, the top of the guide pipe is connected with a radar level gauge through a flange, the radar level gauge detection probe is located in the guide pipe, and the mud is prevented from blocking the radar level gauge detection probe. By means of the method and structure, interference on liquid level measurement caused by the mud splashed from the red mud storage tank with a stirring device can be avoided effectively, and the labor intensity of overhaul and maintenance personnel and dangerous situations are greatly reduced. Through practices, the accuracy of the liquid level measurement is greatly improved, the safe production requirement is met, and the maintenance is convenient. The method and structure have the advantages that the structure is reasonable, the installation is convenient, the measurement is accurate, and the manufacture cost is low.

The invention relates to an important equipment independent grounding device, which comprises a grounding grid, a grounding wire, a clamp and a grounding electrode, and is characterized in that the grounding grid comprises tin-plated copper stranded wires which are vertically and horizontally arranged, the tin-plated copper stranded wires form a grid-shaped structure, the tin-plated copper stranded wires are connected through the clamp, the grounding electrode is perpendicular to the grounding grid, and the grounding electrode is connected with the grounding grid through the clamp. The grounding electrode is connected with a grounding grid, one end of the grounding wire is connected with the grounding grid through a clamp, the other end of the grounding wire is connected with the grounding electrode reserved in a wall body through the clamp, the grounding wire is arranged in the clamp, and the clamp is wrapped by a PVC electrical adhesive tape. The construction method comprises the following steps: reserving a grounding electrode for fixed installation; laying a grounding wire; the grounding grid is connected with a grounding wire; constructing a grounding electrode and a grounding grid; and testing the grounding resistance. The grounding device is mainly composed of the tinned copper stranded wire, the PVC galvanized round steel, the clamp and the grounding electrode, the grounding resistance can be effectively reduced by applying the grounding device to important equipment, and the safety production requirement is met.