42results about How to "Good safety work" patented technology

The invention discloses a machine tool protection system of a precision grinding machine, relates to a precision grinding machine, and provides a machine tool protection system of a precision grinding machine capable of realizing closed, clean and pollution-free processing environment and protecting precision components of the grinding machine from being polluted or scraped. The machine tool protection system is provided with a shield, a left baffle plate, a right baffle plate, a cushion, scraping brushes, a bed guide rail shield, a screw mandrel sheath, a linear rail shield and a screw mandrel shield; the shield is arranged on the periphery of the grinding machine, the left baffle plate and the right baffle plate are arranged on left and right sides of a workbench respectively, the cushion is arranged on the left baffle plate, and the scraping brushes are arranged on the lateral surfaces of the left baffle plate and the right baffle plate; the bed guide rail shield is arranged on a bed guide rail of the workbench; the screw mandrel sheath is arranged at the top end of a screw mandrel of an upright post; and the linear rail shield is arranged on a base guide rail of the upright post, and the screw mandrel shield is arranged on a base screw mandrel of the upright post.

The invention discloses a tower crane tower body section pin shaft connecting method and a connecting pin shaft, and belongs to the technical field of tower cranes. The the tower body section pin shaft connecting method comprises the following steps: arranging a tower body section tenon after an inner hole at the end part of a main branch; arranging a bumper pin in a bumper pin hole of an ear board; arranging the connecting pin shaft which has a lockpin groove end in a connecting hole of the main branch of the tower body section; causing the end part of the lockpin part of the connecting pin shaft to contact with the bumper pin; arranging the lockpin in a lockpin hole of the ear board to lock the connecting pin shaft, using a cotter lockpin to fix the lockpin; exiting from the bumper pin, and completing the connection of a pin shaft. The connecting pin shaft comprises a pin shaft main body, an introducing part and a lockpin part, wherein, the introducing part is positioned between the pin shaft main body and the lockpin part; the lockpin groove used for fixing the lockpin is formed on the lockpin part along a circumference direction. The lockpin groove is formed on the connecting pin shaft of the invention and is free from the direction restrain during the lockpin process; and the introducing part is positioned between the connecting pin shaft main body and the lockpin groove, thereby causing the lockpin groove not to influence the introducing process of the connecting pin shaft. The invention has the advantages of convenient installation and detachment.

The invention relates to a gear wheel and rack coupled hydraulic multi-cylinder reciprocating pump, which consists of a hydraulic oil cylinder, a coupling, a cylinder sleeve of a working hydraulic cylinder, a piston, a piston rod, a gear wheel, a suction valve, a discharge valve, a hydraulic directional control valve, a hydraulic oil pump, an electric motor, and the like which are assembled and connected. The piston rod is provided with a rack; the hydraulic oil cylinder and the piston rod are arranged parallelly; the gear wheel is engaged with racks on the two piston rods simultaneously; and the two piston rods are arranged according to the movement phase difference of 180 degrees. Two hydraulic oil cylinders and two working hydraulic cylinders form a basic unit, and for the two hydraulic oil cylinders in the basic unit, oil can be provided to both non-rod chambers and rod chambers, and can be only provided to the non-rod chambers of the oil cylinders. The invention can be combined into a multi-cylinder reciprocating pump with two cylinders, four cylinders, six cylinders, and more even cylinders. The hydraulic multi-cylinder reciprocating pump has the advantages of high systematic efficiency, long stroke, low stroke frequency, large displacement, high pump pressure, long service life of wearing parts, small fluctuation of the displacement and the pump pressure, good suction performance, and simple and convenient maintenance.

The invention provides a hydraulic power steering gear with an adjustable steering wheel inclination angle. A steering wheel inclination angle adjustment device is arranged on an original hydraulic power steering gear, and the device is sequentially provided with a rotary disk valve pair fork end, a cross shaft element, a steering shaft fork joint, a steering wheel steering shaft and a steering wheel steering shaft sleeve on a fixed seat, wherein, the rotary disk valve pair fork end is connected with a rotary disk valve pair and is exposed from the fixed seat, and a locking mechanism is arranged outside the steering wheel steering shaft sleeve of the device. The hydraulic power steering gear can complete hydraulic power steering and realize vertical and inclination angle adjustment of a steering wheel, in particular the steering wheel inclination angle adjustment device helps adjust inclination angel of the steering wheel quickly according to needs of an operator for better adapting tooperation habit of the operator and improving comfortability, thus alleviating fatigue operation of a driver and being beneficial to safe operation.

The invention discloses a device, a system and a method for replacing a furnace column of a coking furnace. The device comprises a fixing unit, a limiting unit and a support, wherein the fixing unit is used for fixing the support of the device; the front end of the limiting unit is provided with a furnace column limiting part which is used for limiting a moving furnace column in a process of replacing the furnace column; the rear end of the limiting unit is movably connected with the support, and the furnace column limiting part is used for adjusting relative motion between the limiting unit and the support and controlling motion speed and direction of replacement of the furnace column. According to the system disclosed by the invention, hoisting is carried out by a winch, inclined pulling and hanging can be avoided, and security operation is facilitated; a large-scale crane is not used, so that machine-shift expense is reduced. The method is simple, convenient to implement and low in cost, and can be popularized to replacement construction of the furnace column of the coking furnace of any specification.

The invention relates to an intelligent pipe dredging robot. The intelligent pipe dredging robot comprises a main frame, crawler wheels, a main hydraulic rod, a camera, a high-pressure sprayer, hydraulic splitters, a sludge collecting box and a rear hydraulic rod, wherein the crawler wheels are arranged on the bottom of the main frame; the main hydraulic rod which lifts and falls vertically is arranged on the main frame; the camera is arranged on the main hydraulic rod or at the front end of the main frame; the forward high-pressure sprayer or the forward hydraulic splitters is arranged on themain frame; the sludge collecting box which is connected with the main frame is arranged below the hydraulic splitter; and the rear hydraulic rod which is obliquely backward is arranged at the rear of the main frame. The intelligent pipe dredging robot is good in use performance, good in stability, low in cost and high in efficiency, and operates intelligently.

The invention provides an electroscope, which comprises: an insulating rod (10); One end is the holding end; the luminous part (30), the luminous part (30) is arranged on the electroscope head (20); the electroscope also includes: the light guide part (40), the light guide part (40) along the insulating rod (10 ) is arranged on the insulating rod (10), the light guide (40) includes a first end and a second end opposite to the first end, and the first end of the light guide (40) faces the light emitting member (30) The light emitting direction; the reflector (50), the reflector (50) is arranged on the holding end of the insulating rod (10), and the reflector (50) is connected with the second end of the light guide (40). The technical scheme of the invention effectively solves the problem that it is not easy to find that the alarm device sends out an alarm in the prior art.

The invention discloses a gas-excessive alarm miner lamp circuit for mining operation, which comprises a first resistor, a second resistor, a third resistor, a potentiometer, a first audion, a second audion, a third audion, a first capacitor, a second capacitor, a relay, a diode, a power source, a gas sensor, a miner lamp and a switch. When the gas density exceeds the limits, the purpose of alarming for the excessive gas is achieved by flicking the miner lamp; when the miner lamp flicks, a miner cannot normally work, so that a function of forcing the worker to stop working is achieved and the safety operation for mining is benefited; the excessive alarm value of the gas is adjusted by adjusting the resistance value of the potentiometer; the gas-excessive alarm miner lamp circuit has a simple circuit structure and is low in manufacturing cost; the gas-excessive alarm miner lamp circuit has the characteristics of stable work property and high sensitivity and has the popularization and use values.

The invention discloses a machine tool protection system of a precision grinding machine, relates to a precision grinding machine, and provides a machine tool protection system of a precision grinding machine capable of realizing closed, clean and pollution-free processing environment and protecting precision components of the grinding machine from being polluted or scraped. The machine tool protection system is provided with a shield, a left baffle plate, a right baffle plate, a cushion, scraping brushes, a bed guide rail shield, a screw mandrel sheath, a linear rail shield and a screw mandrel shield; the shield is arranged on the periphery of the grinding machine, the left baffle plate and the right baffle plate are arranged on left and right sides of a workbench respectively, the cushion is arranged on the left baffle plate, and the scraping brushes are arranged on the lateral surfaces of the left baffle plate and the right baffle plate; the bed guide rail shield is arranged on a bed guide rail of the workbench; the screw mandrel sheath is arranged at the top end of a screw mandrel of an upright post; and the linear rail shield is arranged on a base guide rail of the upright post, and the screw mandrel shield is arranged on a base screw mandrel of the upright post.

The invention discloses a self-lifting elevator shaft protection operation platform suitable for multiple calibers. The self-lifting elevator shaft protection operation platform comprises a lower stair and stand columns. The lower stair comprises two first inclined pipes which are obliquely arranged, second inclined pipes which are parallel to each other are further arranged between the two first inclined pipes, and a plurality of corridor stair steps are arranged between one of the first inclined pipes and the second inclined pipes; the self-lifting elevator shaft protection operation platform further comprises a fourth external thread steel pipe movably penetrating through the first inclined pipe, the second inclined pipes and the first inclined pipe in sequence; a plurality of stand columns are arranged in the circumferential direction and used for supporting the lower stair; and the multiple stand columns are provided with a plurality of horizontal telescopic pipes which are sequentially encircled to form a ring, and the multiple horizontal telescopic pipes are detachably connected with the stand columns. By the adoption of the scheme, the first inclined pipes can be suitable for different elevator shaft lengths, the fourth external thread steel pipe can be suitable for different elevator shaft widths, and the horizontal telescopic pipes can be suitable for different elevator shaft calibers, so that the purposes of being suitable for various elevator shaft mouths and capable of being turned over are achieved.

The invention provides a wet spraying construction technology. The wet spraying construction technology includes the following steps that a wet spraying mechanical arm is used for spraying concrete mixed liquor, and firstly spraying to the side wall of a tunnel from bottom to top, a discharging port of the wet spraying mechanical arm is perpendicular to the side wall to perform spraying, the distance between the discharging port and the side wall is 0.8-1.2 m, then the arch-shaped top of the tunnel is sprayed, and in the whole process of wet spraying, operation is performed from one end of thetunnel to the other end of the tunnel step by step. During the operation, the wet spraying construction technology realizes convenience and safety, the labor intensity of construction workers is low,efficiency is high, and after wet spraying is completed, the rebound rate of the sprayed concrete is smaller than 15% and can be lowered greatly.