31results about How to "Reduce safety accidents" patented technology

A train approach early warning method and system based on train-ground signal fusion, comprising: a TDCS system server sends part of the train running status information to a TDCS conversion server; a handheld terminal sends a protection area to the TDCS conversion server through a wireless network, and the TDCS conversion server receives After the protected area is sent by the handheld terminal, the acquired train running status information is compared with the location information of the protected area to determine whether there is a train entering the protected area; when a train enters the protected area, the TDCS conversion server sends a message through the wireless network. The early warning information is sent to the handheld terminal, and the handheld terminal performs early warning. The invention uses TDCS data and radio data to realize the integration of remote inter-station early warning and real-time approach early warning. The closer the train is to the work site, the more accurate the early warning data is, and it effectively warns the on-site workers to avoid vehicles when they get off the road.

The invention relates to an automatic unloading assembly line, which belongs to the technical field of assembly lines. Its main scheme includes a mobile material placement table assembly, a gantry assembly, a material conveying assembly that can move horizontally on the gantry assembly, a first support platform, a material processing platform that is set on the first support platform, and a material processing platform that is arranged on the first support platform. The press of the platform, the cutter assembly arranged in the press, and the finished material conveying device arranged directly under the cutter assembly; the cutter assembly includes a movable cutter assembly arranged on the movable block of the press and a fixed The cutter assembly; the movable cutter assembly is connected with the guide rod assembly of the fixed cutter assembly through the guide sleeve assembly; it has the function of cutting finished products and cutting waste materials at the same time, thereby reducing labor costs and improving production efficiency.

A cooling system comprises a refrigerant supply unit (10), a cooling unit (20) used for cooling a to-be-cooled object, a liquid seal groove (30) and a refrigerant recycling unit (40). The cooling unit (20) communicates with the refrigerant supply unit (10) through a refrigerant input pipe (21). The refrigerant recycling unit (40) comprises a refrigerant recycling pipe set (41) and a vacuum pump set (42). The refrigerant recycling pipe set (41) comprises a refrigerant recycling branch pipe (411), a vacuum pipe (412) and a siphon (413), all of which communicate with one another through the same port. The vacuum pump set (42) is connected with the vacuum pipe (412). The refrigerant recycling branch pipe (411) communicates with the cooling unit (20). The siphon (413) communicates with the liquid seal groove (30). The horizontal plane where the refrigerant supply unit (10) is located is higher than the horizontal plane where the liquid seal groove (30) is located. Due to the fact that a certain height difference exists between the refrigerant supply unit (10) and the liquid seal groove (30), cooling water in the refrigerant supply unit (10) can overcome resistance of a pipeline and enters the liquid seal groove (30) by itself. Due to the fact that the whole cooling system is in negative pressure, when the cooling unit is fractured, a refrigerant cannot overflow or hardly overflows, and accordingly production accidents caused by refrigerant overflow can be better reduced.

The invention relates to a replacing and repairing method for a red copper cross arm electrode and a cable connecting plate. The replacing and repairing method includes the repairing steps that copper steel composite plates are replaced with T2 red copper plates; four strengthening studs are additionally arranged at an end between an electrode box and the cable connecting plate and are welded to an end plate of the box; four holes are drilled in the corresponding positions of each T2 red copper plate, and chambering is carried out on one face close to the electrode; the T2 red copper plates with the drilled holes are fixedly connected with the cross arm electrode through the studs; gas metal arc welding is adopted for completing welding between the T2 red copper plates and the cross arm electrode, and welding is carried out according to a certain sequence; and the three T2 red copper plates are folded to be in a shape of a Chinese character 'qi' and are attached to welding lines of the cross arm electrode box and the cable connecting plate in three directions to conduct annular welding. The process is simple and rapid, the repairing cost is low, the requirements for the external environment and condition are not high in the repairing process, safety production accidents can be effectively reduced after the method is applied, the service life of equipment is prolonged, the using cost of the equipment is reduced, and the daily maintenance cost is reduced.

A method for installing an ultra-high-temperature, ultra-high-pressure gas boiler and its auxiliary equipment, comprising the following installation steps: boiler foundation marking, boiler steel frame installation, drum installation, air preheater installation, economizer installation, water wall combination, front Water-cooled wall installation, right water-cooled wall installation, rear water-cooled wall installation, left water-cooled wall installation, wall-wrapping team, wall-wrapping installation, superheater installation, reheater installation, body pipeline installation, guard plate furnace wall installation, its features That is, the installation of the boiler steel frame is the installation of separate parts, and the boiler steel frame is a three-dimensional frame structure. The steel frame is divided into different sub-package parts through the uprights and then assembled and installed as a whole. The beneficial effects of the present invention: reduce high-altitude operations, Protect the life and property safety of the staff, improve work efficiency, reduce working hours, shorten the construction period, the installation accuracy can be controlled at any time, improve the accuracy of the sub-assembly parts of the steel frame, improve the assembly accuracy after the steel frame is assembled, and ensure the follow-up installation of boilers, etc. installation accuracy.

The invention relates to a drainage tunnel capable of being overhauled. The drainage tunnel capable of being overhauled comprises a tunnel body; a culvert pipe distributed in the length direction of the tunnel body is embedded in the bottom of the tunnel body; the inlet end of the culvert pipe is provided with a movable sealing and plugging mechanism; when the sealing and plugging mechanism is opened, the culvert pipe is communicated with the water inflow end of the tunnel body; and when the sealing and plugging mechanism is closed, the culvert pipe is isolated from the tunnel body. In the water shortage time period, the culvert pipe can be utilized for overflowing, a construction machine and personnel can enter the draining tunnel, comprehensive overhauling and maintaining are performed on the drainage tunnel, and durability of the drainage tunnel is improved; and overhauling is convenient, and compared with the prior art, the overhauling efficiency is greatly improved. It is not needed to arrange an isolation wall in the tunnel body of the drainage tunnel capable of being overhauled, the overflowing area is large, the water draining capacity is high, compared with the patent CN105421296A, the water flow speed in the flood season can be properly lowered, and the durability of the draining tunnel is improved; and during excavating construction, the culvert pipe is laid below abottom plate, the width of a construction passageway in the tunnel is not reduced, and the mechanical construction degree of the tunnel is not lowered.

The invention discloses an F-type section coal-mining method allowing commingled mining of coal pillars. The method is specific mainly to the problem of technical methods for stoping of sectional protective coal pillars. A working face is divided into two parts, one part is a solid coal stoping face, and the other part is a coal pillar stoping face. Hydraulic supports are spread in the whole working face. Air from the solid coal stoping face is discharged from an intake roadway via a return roadway during a mining process. The coal pillar stoping face uses local ventilators, air is pressed from the intake roadway into the coal pillar face through flexible air pipes, and the air is returned via the return roadway. During stoping of an upper section, major factures are given to a main roof over a coal wall by pre-blasting, , the basic roof breaks at this position after stoping, and thus pressure increase in close-to-gob areas caused by rotation of the main roof is decreased. In addition, a filled wall which is formed by means of filling and the like isolates an upper section gob area and a lower section coal pillar stoping face, and thus roof fall and side spanning accidents caused are decreased.

The invention discloses an automatic cleaning system and a cleaning process for a liquid chemical tank truck . The automatic cleaning system comprises an electric appliance operation cabinet, a water inlet pipeline and a tank truck tank body. The water inlet pipeline is fixedly connected with a filter, and the filter is fixedly connected with a booster pump through a pipeline. The booster pump is fixedly connected with a centrifugal pump through a pipeline, and a ball valve is fixedly installed on a connection pipeline between the booster pump and the tank truck tank body. A rotary nozzle is fixedly installed at the tail end of the water inlet pipeline. An automatic lifting device is fixedly connected with a connection pipeline of the rotary nozzle through a steel wire rope, and the rotary nozzle is arranged in an inner cavity of the tank truck tank body. A blowdown pipeline is arranged at the bottom of the tail end of the tank truck tank body, and a stop valve is fixedly installed on the blowdown pipeline. A blowdown pump is fixedly installed at the tail end of the blowdown pipeline, and a PH monitoring unit is arranged at an outlet of the blowdown pump. The booster pump, the automatic lifting device and the blowdown pump are all electrically connected with the electric appliance operation cabinet.

The invention discloses an aircraft engine lifting device and belongs to the technical field of lifting equipment. The aircraft engine lifting device is arranged on an engine assembly groove pit base body and comprises vertical columns, slidable lifting bodies, a lifting driving mechanism and engine supporting mechanisms. The vertical columns are of U-steel structures arranged symmetrically in a left-right mode. The slidable lifting bodies are assembled on the left vertical column and the right vertical column correspondingly and are controlled to slide along the left vertical column or the right vertical column up and down by the lifting driving mechanism. The engine supporting mechanisms are fixedly installed on the slidable lifting bodies. Each engine supporting mechanism is provided with a supporting shaft, a shaft base and a bracket assembly. The bracket assemblies are fixed to the side walls of the slidable lifting bodies. The shaft bases are installed on the bracket assemblies. The supporting shafts and the shaft bases are assembled in a hinged mode. By means of the aircraft engine lifting device, automatic lifting and air turning functions of an engine are achieved, the labor intensity of operators is relieved, the working efficiency is improved, and in addition, safety production accidents are decreased.