Abstract: Disclosed are a single-phase-to-ground protection method and system for an active power distribution network. The method includes: acquiring current and voltage data of a line in real time by means of a power distribution terminal, and calculating active power of the line; recording and storing the active power of the line to form an active power curve; performing data statistics according to the active power curve; calculating a direction compensation coefficient and a zero-sequence current compensation coefficient on the basis of statistical data; and detecting whether a single-phase-to-ground fault occurs to the line, where when the single-phase-to-ground fault occurs to the line, a transient-state zero-sequence direction and a steady-state zero-sequence direction are compensated, or a zero-sequence current is compensated, it is determined that the single-phase-to-ground fault occurs to the line when compensation results satisfy action conditions, and tripping is performed or an alarm is given.

Abstract: The present disclosure relates to the field of CO2 geological sequestration, and provides a whole-process multi-parameter monitoring device and method for simulating CO2 geological sequestration and use thereof. A large-scale reactor body is developed, and a geological reservoir at a depth of 800 to 3000 meters is simulated. A modular built-in model device is researched and developed, a multi-type and variable-structure reservoir remodeling technology is developed, and mutual coupling of modules can be achieved. The design idea of separating the pressure reactor from the built-in sample model is adopted in the device. The confining pressure, the pore pressure, the temperature gradient, and the axial load of the device can be independently controlled through a temperature control mechanism and a loading mechanism respectively, so that the restoration of the state of in-situ stresses in the reservoir is realized.

Abstract: An energy storage mechanism and a nail gun having the same. The energy storage mechanism is coupled with a striking mechanism for striking nails out of the nail gun along a striking direction. The energy storage mechanism comprises an energy storage member comprising an air chamber for containing air; an inner cylinder body for installing the striking mechanism therein; and an outer cylinder arranged outside the inner cylinder, such that the air chamber is formed between the outer cylinder and the inner cylinder; an inflatable member disposed on the energy storage member and configured to inflate the air chamber; and a pressure relief member disposed on the energy storage member and configured to release the pressure in the air chamber.

Abstract: A driving mechanism and a nail gun having the same. The driving mechanism comprises a striking mechanism comprising a striker for striking nails out of the nail gun along a striking direction for nailing; an energy storage mechanism coupled with the striking mechanism for providing energy to drive the striking mechanism to move along the striking direction, and storing energy when the striking mechanism is driven to move in an opposite direction of the striking direction; and a transmission mechanism coupled with a driving motor and the striking mechanism for driving the striking mechanism to move in the opposite direction of the striking direction for storing energy. The transmission mechanism comprises a transmission member configured to drive the striker to move in the opposite direction of the striking direction; and a limiting member configured to operably prevent the striker from moving in the striking direction when storing energy.

Abstract: A transmission member and an anti-jamming assembly and a nail gun having the same. The transmission member comprises a rotating member configured to be driven by a driving motor to rotate, and an engaging part arranged on the rotating member. The rotating member has a plurality of pin mounting holes having at least one movable pin mounting hole. The engaging part comprises a plurality of engaging pins installed in the plurality of pin mounting holes. The plurality of engaging pins comprises at least one movable engaging pin moveably installed in at least one movable pin mounting hole. Two adjacent engaging pins define a gap therebetween. The anti-jamming assembly comprises a striker configured to strike nails out of the nail gun along a striking direction for nailing; and the transmission member coupled with the striker for driving the striker to move in a direction opposite to the striking direction.

Abstract: The invention relates to a force supply mechanism and a nail gun having the same. The force supply mechanism includes a cylinder set inside the nail gun; a piston movably disposed in the cylinder; a nail striking member co-movably connected to the piston; and a spring unit disposed in the cylinder and located between the piston and the rear end cover of the cylinder and configured such that an engagement of the nail striking member with a driving member causes the piston to move backward in the cylinder to push the spring unit into a contract state to store energy therein, and an disengagement of the nail striking member with the driving member causes the spring unit to release the stored energy to push the piston to move forward in the cylinder so that the nail striking member is co-moved therewith to strike a nail out of a muzzle.

Abstract: The present invention belongs to the application field of hydrate technology, and discloses a large-scale integrated device of CO2 capture, sequestration and utilization and method. The device separates and purifies CO2 in a forward or reverse way; at the same time, it is configured with a storage simulation system to store the purified CO2; the system is configured with an axial pressure and circumferential pressure system, which can simulate the pressure environment of the deep-sea ocean and provide experimental support for the storage of CO2 in the deep-sea; and the device is reserved for the interface of seawater desalination system module, which can provide an experimental environment for the desalination of seawater by the hydrate method. Finally, the device is equipped with a cold storage system to realize the secondary utilization of energy from industrial high temperature exhaust gas.

Abstract: A striker driving mechanism and a nail gun having the same. The striker driving mechanism includes a frame structure; a piston movably arranged between in the frame structure; at least one spring disposed between the piston and the frame structure and configured to provide driving force for movements of the piston; and a pushing member having a pushing end toward the piston and configured to push the piston toward the at least one spring, thereby compressing the at least one spring to store energy therein. The striker is co-movably connected to the piston. The piston comprises a piston body, made of lightweight materials; and a piston protector, configured to match the push end of the pushing member and installed on the piston body and facing the push member, wherein the piston protector is made of wear-resistant material.

Abstract: A driving mechanism and a nail gun having the same. The driving mechanism includes a driving force supply unit comprising a frame structure having a front limiting seat and a rear limiting seat; a piston movably arranged between the front limiting seat and the rear limiting seat in the frame structure; a striker co-movably connected to the piston; and a spring assembly disposed between the piston and the rear limiting seat in the frame structure, configured such that when the piston is driven to move backward in the frame structure, the spring assembly is pushed into a contract state to store energy therein, and when the piston is free, the spring assembly expands to release the stored energy therein to push the piston to move forward in the frame structure so that the striker is co-moved therewith to strike a nail out of a muzzle.

Abstract: A carbon dioxide sequestration method based on reservoir wettability optimization design and layered regulation, which proposes the following four schemes for a carbon dioxide sequestration process: a carbon dioxide sequestration process seepage characteristics simulation scheme, a reservoir wettability optimization design scheme, a reservoir wettability regulation scheme and a carbon dioxide sequestration well layout design scheme.

Abstract: The present invention belongs to the technical field of hydrate application, and proposes an electric field-based CO2 capture apparatus by a hydrate method and a method therefor. Small particles of hydrate are generated by incoming seawater and incoming hydrate former at low temperature and high pressure. After flowing through the electric field, the particles are quickly formed, and then separated, dried and compressed efficiently by a solid-liquid separation chamber. Finally, hydrate blocks are produced. The combination of a stirring method, a spraying method and an external electric field can effectively solve the characteristics of slow hydrate formation and long cycle. The solid-liquid separation chamber can be designed to efficiently filter out the hydrate particles and prevent a filter plate from blocking. The use of heat exchange chambers in many places make the cooling amount in the discharged waste recycled, greatly thereby improving the utilization efficiency of energy and economic benefits.

Abstract: A method for enhancing geological storage by injecting nanoparticles to stabilize CO2 microbubbles, which belongs to the technical field of multiphase flow. The method first improves the physical properties of the fluid by pre-mixing CO2 and nanoparticles, and then the fluid is transported to the underground through high-pressure pipelines, and then CO2 microbubbles containing nanoparticles are generated through a dense perforated plate arranged by an injection well to improve the dissolution rate and sweep efficiency of the gas in the saline aquifer, so as to enhance the later mixing of the fluid. The combined injection can improve CO2 storage capacity and storage safety, and further reduce the risk of gas leakage in the reservoir.

Abstract: A distributed low energy dynamic thermal management system for solid matter prevention and control in oil and gas transportation pipeline includes pipeline data monitoring terminal, current and electric pulse control terminal, land console, electric heating terminal, wiring flange, oil and gas transportation pipeline, valve structure. The system monitors the state of the pipeline in real time by the pipeline data monitoring terminal, and transmits the monitoring data to the current and electric pulse control terminal in real time, the current and electric pulse control terminal produces different thermal responses to the electric heating terminal according to the state in the tube, raises the temperature inside the tube by generating a continuous current, unblocks pipeline by generating high power electric pulse, so as to realize real-time monitoring and local temperature dynamic control of oil and gas transportation pipeline.

Abstract: The present invention belongs to the technical field of petroleum exploitation engineering, and discloses a 3D modeling method for pore-filling hydrate sediment based on a CT image. Indoor remolding rock cores or in situ site rock cores without hydrate can be scanned by CT; a sediment matrix image stack and a pore image stack are obtained by gray threshold segmentation; then, a series of pore-filling hydrate image stacks with different saturations are constructed through image morphological processing of the pore image stack such as erosion, dilation and image subtraction operation; and a series of digital rock core image stacks of the pore-filling hydrate sediment with different saturations are formed through image subtraction operation and splicing operation to provide a relatively real 3D model for the numerical simulation work of the basic physical properties of a reservoir of natural gas hydrate.

Abstract: The present disclosure provides an apparatus and a method for hydrate-based wastewater treatment and cold storage. The apparatus for hydrate-based wastewater treatment and cold storage includes a water chilling unit, a hydrate-based cold storage tank, an airflow disturbance device, a water layer positioning system, a spraying system, a suction filtration system, a heat exchange system, and a system monitoring device. The water chilling unit provides a secondary refrigerant at a low temperature. The secondary refrigerant flows through an evaporator coil in the hydrate-based cold storage tank for heat exchange. The airflow disturbance device induces hydrate nucleation. The water layer positioning system positions a contact surface between a water layer and a hydrate former after hydrate decomposition to facilitate drawing and separation of the treated upper water layer. The spraying system and the suction filtration system enhance the solid-liquid separation efficiency to improve the removal rate of pollutants.

Abstract: A nail gun having a driving and controlling mechanism. The driving and controlling mechanism comprises a driving assembly disposed inside a casing of the nail gun for striking nails in a striking direction; and a control assembly controlling the driving assembly. The driving assembly comprises a piston movably disposed inside the casing and attached to a striking member for striking the nails; at least one power spring in contact with the piston; a pushing component for pushing the piston towards the power spring; and a motor for rotating the pushing component. The control assembly comprises a main switch configured to produce a first electronic signal; and a safety switch configured to produce a second electronic signal. The main switch and the safety switch are in communication with the motor such that the motor is configured to operate when it receives both the first electronic signal and the second electronic signal.

Abstract: A nail gun having an energy storage mechanism for storing energy used for striking nails out of the nail gun, the energy storage mechanism comprises a guiding rod attached to a fixed plate assembly; a piston disposed on the guiding rod; a striking member mounted on the piston for striking the nails; at least one power spring disposed around an outer periphery of the guiding rod; a guide sleeve moveably disposed around the outer periphery of the guiding rod and between the power spring and the guiding rod; wherein a first end of the power spring abuts against the piston and is configured to be compressed to store energy.

Abstract: The present disclosure relates to the technical field of wastewater treatment, and provides a wastewater treatment method and apparatus based on hydrate-based water vapor adsorption. The apparatus includes a wastewater evaporation zone, a hydrate formation zone, a hydrate decomposition zone, and a data acquisition and control system. Rising water vapor and condensed water formed during evaporation of wastewater at normal temperature react with a hydrate former on a cooling wall surface to form a hydrate, continuous evaporation of the wastewater is promoted, the hydrate is scraped off to a collecting zone below by a scraper after being formed, and the hydrate is decomposed into fresh water, thereby realizing wastewater treatment. The present disclosure provides a method for treating complex wastewater containing a plurality of pollutants, where water vapor is consumed to form the hydrate to promote wastewater evaporation, and water obtained from the decomposition does not contain pollutants theoretically.

Abstract: A nail gun having a striking member installation mechanism comprises a casing having a main casing body, and a striking member baffle removably disposed over a replacement opening of the main casing body; a striking member removably disposed inside the main casing body and below the striking member baffle; and a striking member driving assembly having a piston for driving the striking member in a reciprocating motion direction, wherein the striking member has a striking member tail, a protruding part, and a guiding striking part; wherein the piston comprises a striking member connector having a protruding part receiving hole; and wherein the protruding part is removably received in the protruding part receiving hole.

Abstract: The invention relates to an energy storage and driving mechanism and a nail gun having the same. The energy storage and driving mechanism includes a striking member, a driving member, and an energy storage member. Among them, the energy storage member includes a storage component, which is equipped with an inner cylinder and an outer cylinder. The outer cylinder and the inner cylinder are interconnected and form an air chamber. The striking member is movably disposed inside the inner cylinder, and has a low-energy storage position and a high-energy storage position. When the striking member is at the low-energy storage position, the volume of the air chamber is Vl. When the striking member is at the high-energy storage position, the volume of the air chamber is V2. V1-V2 is approximately or equal to V2/3.