52results about How to "Ensure automatic control" patented technology

The invention discloses a full-automatic hydraulic piling machine using a freely-lowering winch for driving a heavy hammer. The full-automatic hydraulic piling machine comprises a hydraulic control system and an electric circuit control system. The full-automatic hydraulic piling machine is provided with a pile lifting winch, the freely-lowering heavy hammer winch and automatic pile clamping mechanisms. The pile lifting winch and the freely-lowering heavy hammer winch are connected with a pile lifting control oil circuit and a heavy hammer control oil circuit respectively. The pile lifting control oil circuit and the heavy hammer control oil circuit are arranged in a hydraulic control system oil circuit in parallel. An automatic control rack hinge mechanism is arranged on the freely-lowering heavy hammer winch and connected with a PLC in the electric circuit control system. The automatic pile clamping mechanisms are arranged on a piling machine main arm, and a pile clamping system of the automatic pile clamping mechanisms is connected with the PLC. A diesel hammer is not needed for the automatic piling machine, a pile is automatically positioned, the piling process is fully automatic from beginning of the piling, operation is easy, labor is saved, efficiency is high, cost is low, and economic benefits are high.

The invention provides an intelligent control device and method for walking of a coal mining machine. The intelligent control device and method are suitable for coal mining machines. The intelligent control device comprises a coal cutting roller motor current transducer, a coal mining machine traction motor current transducer, a roller rotation-speed transducer, a stress transducer, a vibration transducer installed on a coal cutting rocker arm, a laser sensor, a hall switch, a sensor controlling upward displacement of a hydraulic shaft, a master controller, a variable frequency driver and a traction motor. All the components of the intelligent control device are used for detecting all parts of the coal mining machine, and the coal mining machine is controlled to only operate through monitor data. The mechanical failures caused when the coal mining machine is in contact with rock stratums or faults in the coal cutting process are avoided. Meanwhile, it is guaranteed that automatic control over the process that automatic control over reciprocating coal cutting by a coal face of the coal mining machine is achieved.

The invention relates to a cooking range generating steam by using waste heat. The cooking range a furnace body, a furnace head and a water tank, wherein the furnace body is combined by an inner furnace wall and an outer furnace wall; a hollow region surrounded by the inner furnace wall is a hearth; a plurality of tubular fire bars are uniformly arranged below the hearth at intervals in the furnace body; the furnace head comprises an outer furnace ring, an inner furnace ring and a pot body supporting ring; the lower end of the inner furnace ring is connected to the inner furnace wall; the lower end of the pot body supporting ring is connected to the outer furnace wall; a cavity among the inner wall furnace, the outer wall furnace and the furnace head is a heating cavity; a coil surrounding the hearth is arranged in the heating cavity; a steam pipe communicating with the top of the heating cavity is arranged in the upper part of the water tank; a water outlet pipe communicating with the bottom of the heating cavity is arranged in the lower part of the water tank; a gas outlet pipe is arranged on the top of the water tank; a water inlet is formed between the steam pipe and the water outlet pipe on the water tank; and a float ball water inlet valve is arranged on the water inlet. The cooking range provided by the invention realizes efficient recovery of smoke heat and automatic control of water inflow in a stove using process.

The invention provides a movable sleeve control method for pipeline steel, and belongs to the field of steel rolling. The method includes the steps that firstly, control parameters of movable sleeves between every two adjacent machine frames are determined through a first-stage computer and a second-stage computer according to the following formulas, wherein the target temperature of a strip steel finish rolling outlet is smaller than or equal to 810 DEG C, and the thickness of a finished product is larger than or equal to 8 mm; secondly, a table model of movable sleeve steel type tension coefficients is set up through the second-stage computer according to the requirements for process data and steel types, and steel type tension coefficients of different movable sleeves are obtained by looking up a table and sent out through the second-stage computer during rolling. By means of the movable sleeve control method, the hydraulic movable sleeves between the hot continuous rolling finish rolling machine frames are automatically controlled when the pipeline steel is rolled, the problem that the hydraulic movable sleeves between the hot continuous rolling finish rolling machine frames vibrate is solved when the pipeline steel is rolled, and abnormal shutdown time is shortened.

The invention discloses a steering roller control method for guaranteeing steering stability of strip steels on a treatment line. The method comprises the following steps: (1) a PLC receives the yield strengths and the thickness parameters of the strip steels operating on the treatment line; (2) the steering roller moment control parameters Qn of the PLC are set according to the parameters; (3) when the strip steels operate on the treatment line with constant speed, steering roller moment controllers are controlled through setting the adjusting coefficients A as the minimum value; when the strip steels operate with decreased speed or increased speed, the adjusting coefficients A of all the steering roller moment controllers are increased; and when the accelerations of the strip steels operating with decreased or increased speed are beyond the acceleration change dead area range, the adjusting coefficients A of all the steering roller moment controllers are set as the maximum value. The method can guarantee the steering stability of steering rollers and prevent the influence of the steering oscillation on the product quality, and can be widely applied to the technical field of strip steel production.