36results about How to "Meet the needs of the project" patented technology

The invention which belongs to the technical field of nuclear power concrete especially relates to a nuclear power concrete additive. The nuclear power concrete additive is prepared from the following raw materials, by mass, 30-80% of a polycarboxylic acid water reducer, 10-30% of a polycarboxylic acid slump retaining agent, 1-15% of a retarder, 0-0.5% of a water retaining agent, 0.1-2% of an air entraining agent, 1-20% of a shrinkage reducing agent, 0-0.5% of an antiseptic, 0.05-0.5% of a defoamer, and the balance water. The additive of the invention, which has the functions of concrete workability improvement, retardation (avoiding of cold seams caused by long-time construction), concrete temperature peak value reduction, concrete drying contraction reduction, introduction of minimal steam bubbles into concrete, concrete endurance improvement and the like, allows concrete to satisfy engineering needs.

The invention discloses a method for measuring phase to phase mutual impedance of a long-distance extra-high voltage common-tower double-circuit transmission line. The method comprises the first step that the head end of a measured phase is in an open circuit, the tail end of the measured phase is in ground connection, the head ends of other phases are in an open circuit, the tail ends of other phases are in ground connection, voltages are applied to the head end of the measured phase, currents are injected into the head end of the measured phase, and the current signal of the head end of the measured phase and the induction voltage signals of the head ends of other phases under two frequencies are synchronously measured; the second step that the voltage signals and the current signals under the two frequencies are obtained through an FFT filtering algorithm; the third step that phase to phase mutual impedance values under the two frequencies are respectively calculated according to the voltage signals and the current signals under the two frequencies, and a phase to phase mutual impedance value under the frequency of 50Hz is obtained by averaging the two phase to phase mutual impedance values. According to the method, a traditional measurement method is changed, the influence of line distribution parameter characteristics and induction voltage phases and the existence of power frequency interference are considered in the line connection mode and the algorithm, and especially in the long-distance transmission line, the errors of the phase to phase mutual impedance value measured through the method are reduced, and engineering needs are met.

A mechanical underground vibration-absorption punching drilling tool comprises a spline mandrel, a spline cylinder, a vibration-reducing return spring outer cylinder, and a punching assembly outer cylinder, wherein an upper part matching joint is connected to the top end of the spline mandrel; the spline cylinder is connected with the vibration-reducing return spring outer cylinder and the punching assembly outer cylinder into a whole; the spline mandrel is arranged in the spline cylinder, the vibration-reducing return spring outer cylinder and the punching assembly outer cylinder; the lower end of the spline mandrel is connected with a shunting structure; the spline mandrel is connected with a plunger through the shunting structure; the lower end of the plunger is arranged in a punching cylinder; the lower part of the punching cylinder is arranged in a punching bearing structure; the lower end of the punching bearing structure is connected with a lower part matching joint; and a spacing structure is arranged at the lower end of the punching assembly outer cylinder. According to the invention, the vibration reduction for a drill string is combined with the high-frequency low-punching power of a drill bit, and longitudinal vibration easy to cause fatigue rupture of the drill string is converted into internal energy of a vibration-reducing return spring and punching power providing convenience for improving drilling speed, so as to fulfill rotary punching drilling and improve rock breaking efficiency.

The invention belongs to waterproof material technical field in water conservancy and civil building engineering, and in particular discloses a macromolecule composite heat-resistance waterproof sheet used for production of waterproof coil and the preparation method. The technical proposal is that the invention consists of a middle layer consisting of polypropylene, HDPE and maleic anhydride grafting agent and surface layers consisting of linear polyethylene and HDPE bonded at two side surfaces of the middle layer; the macromolecule composite heat-resistance waterproof sheet is extruded and compounded by the middle layer and the surface layers at two sides of the middle layer; the physical performances of the formed waterproof sheet are greatly improved; by detection, the longitudinal and transverse tensile strength is more than 300N/50mm, namely, more than 500%; the perforation resistance reaches more than 80KN/m when the thickness is more than 0.5mm and reaches 30KN/m when the thickness is less than 0.5mm, thus meeting the engineering requirement.

The invention discloses a magnetic suspension type bridge main tower pylon top displacement measurement device, which is mainly formed by a magnetic suspension rail, a shielding sleeve and an adjustable horizontal installation base. According to the device, based on a magnetic suspension principle, the magnetic suspension rail is utilized for providing a constant vertical force for a suspension mass block, so that the suspension mass block is suspended above the rail, a fixed point in a main tower pylon top displacement test is formed, the magnetic suspension rail, the shielding sleeve and the base are horizontally move along with bridge pylon top displacement, and the bridge pylon top displacement can be obtained through measuring the change of a relative horizontal distance between the suspension mass block and the shielding sleeve. The magnetic suspension type bridge main tower pylon top displacement measurement device provided by the invention is applied in the bridge main tower pylon top displacement test, so that an external fixed point has no need to be set, and the absolute displacement of a bridge main tower pylon top can be accurately measured; the dynamic measurement of the pylon top displacement can be realized, and the device can be widely applicable to the technical fields of bridge load tests, health monitoring and the like. Accordingly, the inventor also builds a corresponding measurement method.

The invention discloses a novel high-strength high-water-retention coal ash high-water material. The materials is prepared from a first major part and a second major part, wherein the first major part consists of 65%-75% of water, a material A (15%-20% of sulphoaluminate cement clinker), a material B (4%-6% of lime and 10%-15% of gypsum), a material A-A (1%-2% of a retarder and 2%-4% of a suspending agent), and a material B-B (0.1%-0.5% of a setting accelerator, 1%-2% of an early strength agent and 1%-2% of a dispersing agent), and the material A, the material A-A, the material B-B and the material B meet a relationship of A:(A-A):(B-B):B= 1:0.1:1:0.04. The coal ash weight of the second major part can reach 30% of the total weight of all the components except water of the first major part. The novel high-strength high-water-retention coal ash high-water material has the advantages of high later-stage strength, good water retention during a stress process, recycle of resources, environment protection and cost saving, and can be applied on a large scale to the field of long-term stable supporting and filling in mining areas

The invention discloses a method for determining the ground mark time of an inner detector of a pipeline, relating to the technical field of inner detection of the pipelines. The method comprises the following steps of: acquiring a friction sound signal which is generated by the friction between the inner detector and the pipe wall and meets a preset rule by an acoustic ground mark system; acquiring an envelope signal through band-pass filtering, full-wave shaping and enveloping acquiring processing; establishing a mathematical model that the amplitude of the friction sound signal of the inner detector, which is received by the ground marker, changes along with the time; substituting the vertical distance between a sensor of the ground marker and a pipeline, the operation speed of the inner detector of the pipeline within a signal time period as well as the obtained envelope signal into the established mathematical model; and acquiring the ground mark time through least square fitting. Proved by experiments, the error of the acquired ground mark time obtained through the method is little; the acquired ground mark time is more accurate and can meet the requirement of projects; and the odometer wheel error of the inner detector of the pipeline can be corrected more accurately.

The invention discloses a method for measuring phase self-admittance and phase self-impedance parameters of alternating-current extra-high voltage same-tower double-circuit lines. The phase self-admittance measurement method includes the following steps that (1) the head end and the tail end of a phase to be measured are in an open state, and the head ends and the tail ends of other phases not to be measured are short-circuited over the ground; (2) alternating-current voltage is applied to the head end of the phase to be measured, the head end and the tail end of the phase are synchronously measured to obtain head end voltage, head end currents, tail end voltage and tail end currents of the phase to be measured, and the time error of synchronous measurement of the head end and the tail end of the phase to be measured is smaller than 1 microsecond; (3) self-admittance is obtained according to a formula. A traditional measurement method is changed, distribution parameter characteristics of a wiring mode and an algorithm, influences of other phases on the phase to be measured and existence of power frequency interference are considered, especially in a long-distance electric transmission and distribution circuit, errors of self parameters measured in the method are reduced and requirements of a project are met.

The invention discloses a method for measuring inter-phase mutual capacitances of long-distance extra-high voltage double-circuit lines on a same tower. The method is suitable for measuring the inter-phase mutual capacitances of the double power transmission lines on the same tower at the frequency of 50 Hz, wherein the distance between the power transmission lines is more than 240 kilometers, and the method is also suitable for measuring the inter-phase mutual capacitances of the short-distance lines. The method includes the steps that firstly, inter-phase mutual capacitance values at two frequencies are acquired, wherein up-down absolute error values of the two frequencies are equal with the frequency of 50Hz as the midpoint; the two inter-phase mutual capacitance values are added and then are divided by two, and then the inter-phase mutual capacitance mean value at the two frequencies is obtained, wherein the mean value is the inter-phase mutual capacitance at the frequency of 50 Hz. Compared with the prior art, the method has the following advantages that a traditional measurement method is changed, the influence of the lines on ground capacitances and interference of power frequency are taken into account in the wiring mode and algorithms, errors of the inter-phase capacitances measured through the method are reduced especially in the long-distance power transmission lines, and the engineering requirement is met.

The invention belongs to the technical field of rigid body rotational inertia determination, and particularly relates to a rigid body rotational inertia determination method based on a torsional pendulum method, wherein the method comprises the steps: obtaining an inertia measurement action parameter K of a torsional pendulum measurement system; obtaining the mass m of the rigid body; obtaining the distance L between the gravity center of the rigid body and the torsional pendulum axis of the torsional pendulum measurement system; obtaining a torsional pendulum period T of the torsional pendulum measurement system; obtaining a damping coefficient xi of the torsional pendulum measurement system; obtaining an aerodynamic damping coefficient Xi' of the rigid body; and calculating rotational inertia I of the rigid body.

The invention discloses a vue-based navigation bar display method, a storage medium and terminal equipment, and the method comprises the steps: obtaining to-be-displayed navigation configuration datawhen a data display instruction is received; and displaying the to-be-displayed navigation configuration data according to a pre-packaged navigation bar assembly. According to the navigation bar assembly packaged in advance, various styles can be flexibly configured for the navigation bar according to the navigation configuration data, so that the requirements of projects are met, and better use experience is brought to users.

The invention relates to a user power supply voltage and load current control device working according to electric network requirements and user need, comprising a user power supply voltage control unit and a load current control unit, wherein the user power supply voltage control unit comprises a voltage transformator, a standard voltage generator, a first comparator, a first amplifier and a backcoupling transformer; and the load current control unit comprises a current transformator, a first current/voltage converter, a standard current generator, a second current/voltage converter, a second comparator, a fixing amplifier and a first coupling transformer. The user power supply voltage and load current control device is green and environment-friendly and has good quality, high efficiency, high speed, and the like, and voltage and current controlled by the user power supply voltage and load current control device can greatly increase the power quality of power supply and power utilization.

The invention relates to the field of wallboards, and particularly discloses a novel heat preservation and insulation integrated wallboard and a manufacturing method thereof. A novel heat preservation and heat insulation integrated wallboard is characterized by comprising a concrete wall body which is formed by pouring a heat insulation concrete mixture; the heat-insulating concrete mixing material comprises the following components in parts by mass: 144-146 parts of water; 338 to 339 parts of cement; 33 to 34 parts of fly ash; and 1165 to 1170 parts of a hollow microsphere filling material. 5.2 to 5.4 parts of a water reducing agent; the surface of the hollow microsphere filler is rough; the hollow microbead filler is obtained by corroding hollow glass microbeads with a corrosive solution. The method has the effects of reducing the building construction difficulty, simplifying the construction process and shortening the construction period.