38results about How to "Improve job safety" patented technology

The invention discloses a telescopic tunneling immediate support device, which effectively solves the problem of unavailable continuous roof contact or poor roof contact capability existing in the prior art during use. The support device comprises hydraulic upright posts, beams and longitudinal beams, and is characterized in that: the bottom of each hydraulic upright post is provided with a base;the beams comprise a front beam, a middle beam, a rear beam, a main support beam and an auxiliary support beam which are arranged in parallel with one another; the longitudinal beams comprise a frontelastic longitudinal beam, a middle elastic longitudinal beam, a rear elastic longitudinal beam, a front rigid longitudinal beam, a middle rigid longitudinal beam, a rear rigid longitudinal beam and a side rigid longitudinal beam which are arranged in parallel with one another and are vertical to the beams; a push hydraulic cylinder is hinged between every two beams respectively; and the elastic longitudinal beams and the rigid longitudinal beams are fixed on corresponding beams respectively, inserted in limiting guide sleeves of corresponding beams and driven to move along the limiting guidesleeve in a reciprocating way by the beams. The support device has the advantages of reasonable structural distribution, convenience for adjusting continuous roof contact, stable supporting and capabilities of improving the operating environment of workers, better meeting the requirement on matching job of an underground laneway support and a roadheader and remarkably improving the support quality and tunneling operation efficiency of a laneway top plate.

The invention discloses a locking oil cylinder, an oil cylinder control system and a climbing fire-fighting truck or a fire-fighting operation vehicle. A piston (1) is installed at the inner end of a piston rod (2) of the locking oil cylinder, and the outer end of the piston rod (2) of the locking oil cylinder penetrates through a guide sleeve (3) to extend out of a cylinder barrel. The locking oil cylinder (100) further comprises an elastic plunger (6) installed on the cylinder barrel and a lock rod (5) located in the cylinder barrel. One end of the lock rod is hinged to the guide sleeve, and a lock hook is formed at the other end of the lock rod. A corresponding clamping groove (11) is formed in the piston, a plunger rod (61) of the elastic plunger extends into the cylinder barrel and is hinged to the lock hook end of the lock rod, and the plunger rod can drive the lock hook to be locked in the clamping groove or recede out of the clamping groove. A mechanical type locking mechanism is adopted, oil cylinder locking or unlocking control can be achieved in the manner that a plunger control valve unit (30) and an on-off valve (40) are combined to control the extending and retracting of the plunger rod, operation and control are convenient, and the operation safety of the climbing fire-fighting truck or the fire-fighting operation vehicle can be improved.

The invention discloses a system for disconnecting or connecting a drainage wire of a distribution network in an alive state and a method thereof for disconnecting or connecting the drainage wire. Thesystem includes a crawler overhead work vehicle and a working robot platform installed at the tail end of the lifting arm of the crawler overhead work vehicle. The working robot platform includes a control box, mechanical arms, and working tools connected to the tail ends of the mechanical arms. The first and second mechanical arms are both multi-joint multi-degree-of-freedom arms and are symmetrically mounted on both sides of the control box. Each working tool includes a clamping tool, a wire stripping tool and a wire clamp installation tool. The clamping tool is connected to the tail end ofthe first mechanical arm and is mainly configured to clamp an insulated wire and a lead. The wire stripping tool and the wire clamp installation tool are fixed to the top surface of the control box.The second mechanical arm connects the wire stripping tool and the wire clamp installation tool for corresponding operations through an electric rotary joint at its tail end as required. The system can keep workers away from an overhead high-voltage working environment, improves the safety of work and reduces the labor intensity of the workers.

The invention provides a forklift management method and system and terminal equipment, and the method comprises the steps: wireless communication connection with at least one forklift is established;when the personnel identity verification information is received, personnel authority management is carried out on the forklift according to the personnel identity information; when operation state information sent by the forklift is received, safety management is conducted on the forklift according to the operation state information; when battery state information sent by the forklift is received, battery management is conducted on the forklift according to the battery state information and pre-stored battery maintenance information; and when vehicle state information sent by the forklift isreceived, maintenance management is conducted on the forklift according to the vehicle state information and pre-stored vehicle maintenance information. According to the invention, forklift drivers, forklift safety, forklift batteries and forklift maintenance states can be effectively managed, more scientific and comprehensive systematic management is provided for forklifts, the operation safety and the operation efficiency of the forklifts are improved and the service life of the forklifts is prolonged, and real-time supervision and omnibearing management and control of the forklifts and thedrivers thereof are realized.

The invention discloses a suction anchor type surface layer well building device suitable for deep water natural gas hydrate exploitation. The suction anchor type surface layer well building device comprises a suction anchor type guide pipe top cover, a suction anchor outer cylinder, an inner guide pipe, a soil plug prevention functional rib plate, a supporting rib plate and a recoverable conicalguide pipe plug. The suction anchor type guide pipe top cover, the suction anchor outer cylinder and the inner guide pipe are combined to form a suction anchor type guide pipe basic form; the recoverable conical guide pipe plug consists of a conical guide pipe plug and a telescopic fixing device. The suction anchor type surface layer well building technology can be realized by combining the suction anchor installation technology with a guide pipe, the conventional surface layer well construction jetting down-flowing guide pipe technology is replaced, the bearing capacity of a wellhead system is greatly improved, the suction anchor type surface layer well building device is suitable for deep water natural gas hydrate exploitation, meanwhile, the earth plug phenomenon frequently encounteredin suction anchor installation is avoided, and the guide pipe is internally clean and free of mud after installation.

The invention discloses engineering machinery, and a control system, a method and a device of an arm support of the engineering machinery. The control system, the method and the device can improve the operation safety of the engineering machinery. The control system of the arm support comprises a high-voltage sensor and a controller, wherein the high-voltage sensor is mounted on the arm support of the engineering machinery, is used for detecting an electrical signal around the arm support, and outputs a signal value according to the strength of the detected electrical signal; the stronger the electrical signal detected by the high-voltage sensor is, the larger the output signal value is; the controller is used for acquiring the signal value output by the high-voltage sensor, and controls a movement direction of the arm support according to the signal value output by the high-voltage sensor; and when the arm support moves to one direction, if the signal value output by the high-voltage sensor is increased along with the time and is greater than a preset alarm threshold, the arm support is controlled not to continuously move to the direction.

The invention relates to a method of removing sulfur and aromatic hydrocarbon from base oil regenerated from waste lubricating oil. The method comprises the following steps of extraction, centrifugal separation, short-range distillation and public equipment based condensation. In the extraction step, the regenerated base oil is extracted by using N-methyl pyrrolidone (NMP) which serves as an extracting agent. Due to extraction, sulfur and aromatic hydrocarbon can be deeply removed, the chroma of the regenerated base oil can be decreased, the flash point, viscosity index and quality of the regenerated base oil can be increased, and the problem on the generation of waste pollutants of the traditional acidic clay based refining can be avoided. The short-range distillation and reclamation can be carried out under a low temperature and pressure work condition and has the characteristics of energy saving and improved operation security. In addition, the method further comprises the step of recycling of NMP through short-range distillation.

The invention discloses an underwater navigation detection mobile terminal. The underwater navigation detection mobile terminal includes a main framework, a switch button, a liquid crystal display, aninertia integrated navigation unit, a control unit, a GPS unit, an illuminating imaging unit, a forward-looking sonar and a battery, wherein the switch button, the liquid crystal display, the inertiaintegrated navigation unit, the control unit, the GPS unit, the illuminating imaging unit, the forward-looking sonar and the battery are arranged on the main framework. The mobile terminal can provide position information for divers in real time, thus off-line planning of a detection path can be achieved, distant target searching can be conducted through the sonar, an illuminating camera device is used for identification, target detection difficulty of the divers is greatly reduced, the working distance and time of the divers are reduced, the mental stress of the divers is reduced, and operation safety is improved. According to the mobile terminal, modular design is adopted, maintenance is convenient, functional expansibility is high, and diversity requirements of tasks are met.

The invention discloses a crane operation real-time navigation system and method. The system comprises a route planning unit, a man-machine interaction unit, an arm support gesture detecting unit andan obstacle collision detecting unit. When a lifting task exists, the system can automatically plan a crane motion path and display a motion and a target point which are about to be executed currentlyand a motion and a target point which need to be executed at a next stage on a man-machine interface, so that graphic guiding of operators can be achieved. When a certain sub-motion is executed, thesystem detects an obstacle, or when a certain sub-motion passes the target point, the system can plan the motion path again and update the path in time on the man-machine interface, and safe transferof lifted objects is ensured.

The invention relates to an electric power production area alarm method based on laser scanning point cloud. The method comprises the following steps: S1, filtering out ground points from the laser point cloud; S2, performing super voxel segmentation on the point cloud of which the ground point is filtered out; S3, marking charged supervoxels, and calculating a dangerous space; S4, generating a safe operation space and a dangerous operation space based on the dangerous space obtained in the step S3, the dangerous space generated when the power-off maintenance equipment is electrified and the operation space; S5, after the equipment with the positioning alarm function enters the operation site, judging whether the equipment leaves the safe operation space or enters the dangerous operation space or not in real time, and if yes, conducting corresponding alarm; and S6, after operation is finished and power transmission is recovered, recovering the dangerous space. The method is beneficialto improving the operation safety.

The object of the invention is a pulp dryer's end wall (1), which comprises an upper edge and a lower edge, the distance between which edges defines the height of the end wall. An opening (5')for introducing the pulp web inside the pulp dryer or for bringing the web out of the pulp dryer is arranged between the upper and lower edges. One or more openable end wall elements (2, 2') for observing the inner parts of the pulp dryer and for performing maintenance operations is arranged between the upper and lower edges, the end wall element (2, 2') being arrangeable to a closed and an open position in order to cover or to expose a turn roll (7,7') located in the inner part of the pulp dryer. The height of the openable end wall element is at least 50% of the distance between the axes of two turn rolls (7,7') of the pulp dryer that are one above the other and exposed in the open position. An object of the invention is also a pulp dryer and a method for observing the inner parts of the pulp dryer.

The invention provides a nuclear power site confined space gas detection method and system, which relate to the technical field of safety construction. The method comprises the following steps of S1, placing a robot in a confined space during operation, S2, moving the robot moves in the confined space, S3, acquiring gas data at the robot in real time, S4, judging whether the safety degree of the gas data is higher than a first threshold value or not, and if yes, prompting that operation is allowed, S5, judging whether the safety degree of the gas data is lower than a second threshold value or not, if yes, starting an alarm to prompt evacuation, and executing S6, or otherwise, executing S7, S6, judging whether the safety degree of the gas data is lower than a third threshold value or not, if yes, generating a dangerous area, and sending an evacuation message to workers in the dangerous area, and S7, completing operation, and recycling the robot. The system is simple and convenient, does not need manpower management, saves labor cost, is high in intelligent degree, is high in gas detection precision, is good in safety, carries out grading alarm, and guarantees timely and efficient alarm.

The invention discloses special equipment for machining a head of an air intake welding manifold of an automobile, and belongs to the field of automobile accessory machining. The special equipment comprises a machine body, wherein a cutter head, a workpiece fixing seat for fixing the head of the manifold and a sliding rail are arranged on the machine body; the workpiece fixing seat is connected to the sliding rail in a sliding manner and faces the cutter head; an inner cavity for letting the head of the manifold extend is formed in the cutter head; cutters for machining the head of the manifold are uniformly arrayed at the edge of an opening, which faces the workpiece fixing seat, of the inner cavity; and the cutter head is arranged at one end of the sliding rail, and a driving device for driving the workpiece fixing seat to move along the sliding rail is arranged at the other end of the sliding rail. The special equipment is high in manifold head machining speed and high in production processing efficiency.

The invention discloses a remote control system for a swivel cementing head. The remote control system for the swivel cementing head comprises an electric mechanism, a wireless remote controller and a pneumatic mechanism; the electric mechanisms and the pneumatic mechanism are arranged on the outer surface of a swivel cementing head body; the wireless remote controller is arranged at an operation position of a rear person and communicates with the electric mechanism through radio wave; the electric mechanism communicates with the pneumatic mechanism through a cable. According to the remote control system for the swivel cementing head, the pneumatic mechanism can be connected and the electric mechanism can be started when operating the swivel cementing head, then a worker can operate through the wireless remote controller according to the requirement, and a wireless transceiver can transmit an instruction to the electric mechanism and the pneumatic mechanism, so as to achieve the corresponding operation; the remote control system works through radio wave achieve the unmanned operation of an explosion proof region, and therefore, the labor cost is saved, and moreover, the working safety is greatly improved.

The invention discloses a pointing following type vehicle-mounted fire monitor device, belongs to the technical field of fire fighting apparatus, and aims to overcome the defect that fire fighters cannot know or adjust the pointing of a nozzle of a fire monitor in a cab when the conventional vehicle-mounted fire monitor device is used. The pointing following type vehicle-mounted fire monitor device consists of a fire monitor and a remote controller, wherein the remote controller is a nozzle pointing controller of the fire monitor, and comprises a bottom cover, a support body, a horizontal swing, a simulated nozzle, a potentiometer, a remote control circuit board and the like; the pointing of the nozzle of the fire monitor is set by rotating the simulated nozzle; the position of the adjustable end of the potentiometer in the remote controller is detected and converted into horizontal and pitch angle data corresponding to the pointing of the simulated nozzle; the position of the adjustable end of a feedback potentiometer in the fire monitor is detected and converted into angle data corresponding to the actual pointing of the nozzle of the fire monitor; and the nozzle of the fire monitor follows to rotate in real time according to the angle data of the pointing of the simulated nozzle. The pointing following type vehicle-mounted fire monitor device is mainly used for a fire truck.

The invention relates to an environment-friendly dredging device for a municipal water conservancy project. The environment-friendly dredging device comprises a tensioning device, a conveying belt and a box body, wherein an underground pipeline is integrally assembled and formed by a plurality of groups of square culverts, a water inlet communicated with the underground pipeline is dug in the ground, the tensioning device comprises a winch and two groups of fixed pulleys, the conveying belt is laid in the underground pipeline, the two groups of fixed pulleys are respectively fixed on the ground and the inner bottom surface of the underground pipeline, a rope which is wound and rotated with the two groups of fixed pulleys is wound on the winch, and the lower end part of the rope is fixed with one end of the conveying belt in a bolting mode; the box body is located at one end of a water outlet, and a first roller and a second roller which are distributed up and down are rotationally connected to the end surface of one side, close to the underground pipeline, of the box body; and the conveying belt is wound and rotated with the first roller and is wound on the second roller, and a driving motor for driving the second roller to rotate is installed on the box body. According to the environment-friendly dredging device, operators are prevented from entering the underground pipeline, the overall dredging operation process is high in efficiency, and the operation safety of the operators is improved.

The invention relates to the technical field of mechanical arms, in particular to a modular underwater pile foundation structure self-adaptive cleaning and damage detection mechanical arm which is characterized in that one end of a transmission arm rod is provided with a modular interface, the other end of the transmission arm rod is provided with a mechanical arm connecting part, the mechanical arm connecting part is provided with two arm frames, and each arm frame comprises an inner side arm frame and an outer side arm frame; the inner side arm frame and the outer side arm frame are connected through a joint, and a soft movable cleaning part is arranged on the inner side of the arm frame; the modularized interface is connected with an underwater unmanned aerial vehicle interface to transmit current and control signals, a waterproof steering engine is arranged in the transmission arm rod to receive the control signals, a gear transmission system is arranged in the driving mechanical arm connecting part to achieve opening and closing of the two arm frames, and the soft body movable cleaning part is fastened to three sliding blocks capable of relatively moving. While the surface of the pile foundation is cleaned, damage detection can be conducted on the pile foundation structure, the work efficiency can be greatly improved, manual intervention is reduced, the safety degree of the work is greatly improved, the labor cost is reduced, and great practical significance is achieved.

The invention discloses an interactive application and management platform suitable for new energy power generation operation and maintenance integration, and relates to the technical field of VR virtual reality, the interactive application and management platform comprises a platform, a cover plate, protection doors and baffle plates, the cover plate is arranged at the top end of the platform, the cover plate is movably connected with the platform, the protection doors are symmetrically arranged on the side surfaces of the platform, and the baffle plates are symmetrically arranged in the platform. A rest room is arranged between the two baffles, VR experience rooms are arranged on the two sides of the rest room, the protection doors are arranged at doorways of the VR experience rooms, virtual reality devices are arranged in the spaces of the VR experience rooms, the virtual reality devices can achieve the functions of free roaming, guided explanation and immersive activities, reinforcing columns are arranged at the four corners of the bottom end of the platform, and the reinforcing columns are arranged at the four corners of the bottom end of the platform. The protection door is provided with access control equipment, and the access control equipment has a face unlocking function and a password input unlocking function. The system has the beneficial effects that through the VR technology, the efficiency of a new person for starting wind power and photovoltaic power generation integrated equipment is improved, and the working capability and the safety level are improved.

The invention discloses a rotary member self-locking device which comprises a cylinder rod and a cylinder barrel which are nested on the inner side and the outer side and fixedly connected with a rotary member and a fixing member respectively, wherein a first bump of the cylinder rod and the inner wall of the cylinder barrel form a first rotary pair; a second bump of the cylinder barrel and the outer surface of the cylinder rod form a second rotary pair; the first bump and the second bump are used for circumferentially dividing a medium space between the cylinder rod and the cylinder barrel into a first cavity chamber and a second cavity chamber which are relatively sealed; the first cavity chamber and the second cavity chamber are communicated with a switch valve connector opened in a normal state through a first through hole and a second through hole respectively; and a switch valve can be switched to a cut-off state according to the medium pressure of the first cavity chamber or the second cavity chamber to limit the relative movement of the cylinder rod and the cylinder barrel. The potential safety hazard caused by failure of rotation control is effectively avoided through a cooperative relationship of the members of the self-locking device, so that the safety reliability of the overall operation is guaranteed. On the basis, the invention further provides engineering machinery using the self-locking device.

The navigation mark recycling and hoisting device comprises a bracket, a clamping arm, a hoisting portal, a portal turnover mechanism and a bracket lifting turnover mechanism, the hoisting portal comprises a stand column, a base, an annular track and a crane, the bottom of the stand column is hinged to the base, the annular track is arranged at the top of the stand column, and the crane moves along the annular track; the gantry turnover mechanism is installed on the base, the ends of telescopic rods are connected with the stand columns, the bracket lifting turnover mechanism comprises a connecting cross beam, telescopic guide rails, a lifting oil cylinder and a bracket turnover oil cylinder, the telescopic guide rails are symmetrically arranged on the ship body, the bottom of a bracket is hinged to the connecting cross beam, and the two ends of the connecting cross beam are connected with inner sleeves of the telescopic guide rails; the lifting oil cylinder is fixed to the outer sleeve, the end of the telescopic rod is connected with the inner sleeve, the bracket overturning oil cylinder is fixed to the connecting cross beam, and the end of the telescopic rod is connected with the bottom of the bracket. The problems of automatic recovery and lifting water outlet hoisting of the navigation mark are solved, and fall-free hooking or maintenance operation on the navigation mark on a deck is achieved.

The invention discloses a portable drilling machine. The portable drilling machine structurally comprises a drill bit, a mounting head, an auxiliary handle, a machine body, a shoulder rest, a main handle and a water inlet pipe, wherein one end of the machine body is connected with the mounting head; the drill bit is mounted on the mounting head; and the other end of the machine body is connected with the shoulder rest. Compared with the prior art, the portable drilling machine has the beneficial effects that the drill bit and the mounting head are preliminarily fixedly connected through threads, a clamping block is pressed by a first spring to be matched with a clamping groove, then the drill bit is limited and fixed again and is effectively prevented from rotating slightly to be excessively engaged with the mounting head, the drill bit is prevented from cracking and being thrown out, and the operation safety coefficient can be improved; and a second spring is used for pressing a liquid storage bag so that cooling liquid can further generate pressure on the clamping block to prevent the clamping block from shrinking inwards, thus, the clamping firmness of the clamping block and theclamping groove can be further improved, the mounting stability of the drill bit and the mounting head can be greatly improved, and the drilling quality is favorably improved.

The invention relates to the technical field of distribution network maintenance, in particular to a distribution network overhead line electric pole erecting and removing device. The device comprises a chassis and a control mechanism, and an electric pole channel disc is arranged on the front portion of the chassis; an electric pole root supporting mechanism is hinged to the upper surface of the base plate on the rear portion of the closed portion of the electric pole channel plate, telescopic holding arms are arranged on the two sides of the middle rear portion of the upper surface of the base plate respectively, and holding grippers are arranged at the ends of the telescopic holding arms; sliding rails extending from the outer portion of the closed opening of the electric pole channel disc to the periphery of the base plate are arranged in the middle of the upper surface of the base plate in the longitudinal direction, and sliding seats are arranged in the sliding rails and connected with the telescopic holding arms through coupling pieces. By means of the device, the safety and reliability of electric pole erecting and removing work can be effectively guaranteed, the mode of high-altitude electric pole moving is replaced with ground operation, the operation safety is remarkably improved, the operation links are optimized, the operation efficiency is improved, the electric pole does not need to be hoisted through a crane, the construction links are reduced, and the operation efficiency is obviously improved.

The invention discloses a continuous renal replacement therapy catheterization auxiliary testing device, which is characterized in that a non-invasive delivery pump is arranged on a host, the auxiliary testing device further comprises a liquid inlet pipeline and a liquid outlet pipeline which are communicated with each other through the non-invasive delivery pump, a pressure sensor A is arranged on the liquid inlet pipeline, and a pressure sensor B is arranged on the liquid outlet pipeline; the host is provided with a controller and a display module, and the pressure sensor A and the pressure sensor B are connected with the controller; and a switch is also provided, which is electrically connected with the non-invasive delivery pump. The free ends of the liquid inlet pipeline and the liquid outlet pipeline are connected with tee joints. The method can be used for objectively and accurately judging the smooth catheterization condition of the hemodialysis double-cavity tube, and is safe and reliable to operate.

The invention discloses a non-explosive mechanical rock breaking circulation drift filling mining method which comprises the steps that stopes are arranged along the trend of an ore body, no stud is reserved between the stopes, the stopes are stoped and filled in a layered mode from bottom to top, a cantilever type heading machine is adopted in the layers for drift type cutting ore breaking stoping, and the drift is circularly stoped layer by layer on the stope layering plane from outside to inside. And in the recovery process, trackless mining transportation equipment follows ore removal, and access road partition filling is carried out. The non-explosive mechanical cutting ore breaking mode is adopted for stoping, and the method has the advantages of being safe in stoping operation, high in efficiency, low in cost and the like.

The invention provides an infrastructure on-site personnel management and control system and method based on a 5G network architecture, the management and control system comprises an on-site entrance guard, an on-site camera and a monitoring background, and the on-site entrance guard and the on-site camera are connected with the monitoring background through a 5G communication network. The management and control method specifically comprises the following steps: identifying the identity of each person entering the capital construction site through a site entrance guard to obtain personnel basic data, and determining a personnel access area corresponding to each person entering the capital construction site by a monitoring background according to the personnel basic data, and monitoring the action track of the personnel entering the capital construction site through the site camera, giving an alarm when the personnel exceed the personnel access area, feeding back the position of the personnel in real time, and stopping the alarm when the personnel entering the capital construction site is detected to return to the corresponding personnel access area. According to the invention, access control and action track monitoring can be carried out on the personnel in the capital construction site, and the personnel control of the capital construction site can be better realized.

The invention relates to self-moving type tunnel dust removal equipment which comprises a dust removal device, a walking device, an air duct device and a pollution discharge device, the walking device comprises a carrier loader, the top of the carrier loader is provided with the air duct device, one end of the air duct device is connected with the dust removal device, the dust removal device comprises a fan, and a pollution discharge opening of the dust removal device is connected with the pollution discharge device. An intelligent control system is arranged among the dust removal device, the walking device, the air duct device and the pollution discharge device, the intelligent control system comprises a main control module, a remote control unit, a detection unit and a communication unit, and the remote control unit is connected with the main control module through the communication unit; the main control module controls the dust removal device and the pollution discharge device to work through the detection unit in a PID control mode. The walking device is combined with the intelligent control system to realize remote control running or automatic running to bring the air duct device and the dust removal device to an area with high dust concentration for dust removal operation, and the intelligent control system is combined to realize automatic dust collection, dust removal and pollution discharge operation.

The invention discloses a non-explosive mechanical rock breaking upward horizontal layered filling mining method perpendicular to the trend, which comprises the following steps: arranging stopes perpendicular to the trend of an ore body, arranging a first-step stope and a second-step stope at intervals, firstly mining the first-step stope and filling a goaf, and then stoping the second-step stope and filling the goaf; the stope is stoped from bottom to top in a layered mode, a cantilever type heading machine is adopted for cutting non-blasting ore breaking, trackless mining transportation equipment is adopted for ore drawing, layered cutting ore breaking is conducted, layered filling is conducted after ore drawing is completed, a filling body is maintained to the design strength, then layer transferring is conducted, stoping of the next layer is started, and the steps are repeated till stoping of the whole stope is completed. The non-explosive mechanical cutting ore breaking mode is adopted for stoping, and the method has the advantages of being safe in stoping operation, high in efficiency, low in cost and the like.

The invention discloses an engine valve collet dismounting and mounting auxiliary tool. The engine valve collet dismounting and mounting auxiliary tool comprises a screw, a fixing clamping base, a guiding block, a press-fitting mechanism and a support. The guiding block is mounted on the upper portion of the support. The fixing clamping base is mounted on the upper portion of the guiding block. The screw penetrates through the fixing clamping base and the guiding block in the vertical direction. The lower portion of the screw is connected with the press-fitting mechanism. A valve spring is pressed through the screw, when an heavy-duty diesel engine is maintained, the valve spring can be pressed easily, the dismounting and mounting operation of a valve collet is completed, meanwhile, the screw has the self-locking function, after pressing is completed, a maintenance man can conduct the dismounting and mounting operation with two hands, the operation efficiency is improved, the operationsafety is improved as well, the press-fitting mechanism can be adjusted according to valve rods of different types, and the application demands of the valve rods of different types can be met.

The present invention relates to cemented oil tank and its production process. The cemented oil tank as fuel oil storage for motor vehicle has simple production process, less operating damage, stable quality and low cost. The cemented oil tank includes upper tank unit, lower tank unit and connecting pipes, the upper tank unit has upper tank body, oil inlet and outer flange; and the lower tank unit has lower tank body. The production process includes the step of forming the upper tank body, upper tank unit and lower tank unit; the step of painting adhesive in the contact surface between the upper tank body and the lower tank body; and the step of heating inside heating furnace at 150-190 deg.c to cure and combine.

The invention relates to the field of deep-sea shallow oil and gas drilling and production, in particular to a suction anchor wellhead device suitable for oil and gas recovery in deep-sea shallow multi-gas commingling production accidents. The well mouth comprises a suction anchor top cover, a well mouth body, an inner guide pipe, a suction anchor inner compartment bottom plate, a suction anchor outer cylinder, a collecting guide pipe, a one-way valve, reinforcing ribs and a supporting structure. The suction anchor top cover is provided with a circulation valve, a well mouth body, a hanging ring, a suction pump connector and a pressure gauge. The lower portion of the wellhead body is connected with the inner guide pipe, the suction anchor inner compartment bottom plate is located in the suction anchor, a center hole is formed in the center, and a circulation hole and a collection guide pipe are arranged on the upper portion. The lower part of the collecting conduit is connected with a matched one-way valve. The well mouth bearing capacity of the suction anchor is improved, the well body structure optimization space is large, oil and gas recovery treatment after shallow gas blowout, well kick and oil and gas leakage accidents possibly occurring in deep sea shallow drilling can be conducted, pollution of oil and gas leakage to the marine environment and the atmospheric environment is reduced, and environmental protection value is achieved.