9results about How to "Reduce vacuum" patented technology

The utility model provides a novel negative pressure conveying system, including feed hopper, vacuum feeding machine and negative pressure fan, and feed hopper and vacuum feeding machine are connected through material conveying pipeline between, and vacuum feeding machine and negative pressure fan are connected through gas supply pipeline between, along the direction of conveyance, and the air supplementing valve and the broken empty valve are set gradually on material conveying pipeline. This novel negative pressure conveying system installs the broken empty valve in material conveying pipeline, can effectively reduce the material accumulation in material conveying pipeline in the process of unloading.

The present application relates to the field of mechanical assembly and hoisting, in particular to a cylinder head hoisting device and method for large low-speed diesel engines; the device comprises a main hook, a variable stiffness joint, a lifting tool frame, four double-acting hydraulic cylinders and cross pipelines; the device connects the rodless cavities of the four hydraulic cylinders diagonally through the cross pipelines to build two closed fluid networks; the core is that when the hoisting gravity center deviates, the eccentric load tension forces the hydraulic oil to flow spontaneously between the diagonal hydraulic cylinders, thereby synchronously extending the equivalent sling length of the eccentric weight side and the diagonal side, making the diagonal line as a whole sink to maintain a horizontal posture; the present application discards the complex external leveling mechanism, directly realizes the self-adaptive leveling of the lifting tool frame by using internal fluid physical flow, effectively overcomes the inclination problem caused by eccentric load in traditional hoisting, and provides a stable horizontal posture for cylinder head lowering.

The present application relates to the technical field of electric battery drying, in particular to a battery staged flow type vacuum drying method, compared with the traditional vacuum drying method, the present application can avoid the situation that a large number of water molecules return to the battery during pressure relief in the baking process, and then the overall drying time of the battery is shortened, the drying efficiency of the battery is improved, the amount of drying gas is reduced, and the product quality is improved.

The utility model relates to the technical field of desulfurization and impurity removal, in particular to a slurry impurity removal device of a belt conveyor. The slurry impurity removing device of the belt conveyor comprises a driving wheel, a filtering conveying belt is arranged on the driving wheel, a discharging port is formed in the filtering conveying belt, a discharging outlet is formed in one side of the driving wheel, and a first-stage rotary washing wheel and a second-stage rotary washing wheel are arranged between the discharging port and the discharging outlet. A loosening rake is arranged between the first-stage rotary washing wheel and the second-stage rotary washing wheel, a first-stage supporting frame is arranged below the first-stage rotary washing wheel, a first-stage scraping plate is arranged on the first-stage supporting frame, a first-stage impurity removing canvas is arranged on the first-stage scraping plate, and the first-stage impurity removing canvas is in contact with the filtering conveying belt. According to the device, through the arrangement of the loosening rake, black substances attached to the interior or the bottom of gypsum are also exposed, and the impurity removal efficiency is greatly improved; and through the arrangement of a scraping plate, the working efficiency of the impurity removal canvas is improved.

The utility model discloses a kind of gas extraction device, including base shell, extraction module, pressure sensor, switch module, current detection module, control module and control module, pressure sensor is used to detect the pressure value of container cavity when being powered, the input end of switch module is used to connect with power supply, the output end of switch module is connected with the power end of pressure sensor, the sampling end of current detection module is connected with pump body assembly to detect the working current value of pump body assembly, control module is connected with control module, the output end of pressure sensor, the output end of current detection module, the controlled end of switch module and pump body assembly respectively, act on control module can make control module switch at least between first working state and second working state, wherein, in first working state, control module controls switch module to turn on, in second working state, control module controls switch module to turn off, and the design control is reasonable and stable, convenient and reliable to use.

This application provides a vacuum regulating valve, installed on an external vacuum mechanism, comprising: a valve core with a cover connected to one end; an adjusting member sleeved on the valve core; the adjusting member being movable on the valve core and connected to the other end of an elastic member; an elastic member sleeved on the valve core, with its two ends connected to the cover and the adjusting member respectively; a valve seat disposed at the end of the adjusting member away from the elastic member, the elastic member having elasticity and capable of pressing the cover onto the valve seat, thereby sealing the cover and the valve seat; and a valve housing, wherein the inner wall of the valve seat and the outer wall of the adjusting member are both sealed to the inner wall of the valve housing, and the cover and the valve core are both located inside the valve housing; when there is a gap between the valve seat and the cover, the external vacuum mechanism communicates with the outside. This application improves the stability of the external vacuum mechanism.

This invention discloses a slag control method, system, device, and medium based on image recognition. It includes acquiring slag-turning features using image recognition; quantifying the slag-turning risk level based on the slag-raising rate; establishing a pressure relief valve opening and closing mechanism based on the slag-turning risk level; and controlling the pressure relief valve to automatically adjust according to the opening and closing mechanism until a preset slag-turning state is identified. This solves the technical problem in existing technologies where steel slag overflows from the ladle cover, damaging related vacuum equipment. It achieves the technical effect of adjusting the gas overflow rate from the slag and the exhaust rate to a balance point, thus preventing steel slag from overflowing from the ladle cover.

The utility model relates to a floor brush and cleaning equipment, floor brush includes floor brush main part, at least one roll brush group and connecting structure, floor brush main part is equipped with the suction cavity with opening, same roll brush group includes at least two roll brushes, the roll brush can rotate around the central axis, the adjacent two roll brushes of same roll brush group are connected through connecting structure, make the included angle angle between the two roll brushes of being connected variable in the nonparallel horizontal plane preset plane. The adjacent two roll brushes of same roll brush group are connected through connecting structure, make the included angle angle of the two roll brushes each other variable, can improve the cleaning effect of floor brush on the non-flat surface.

The utility model provides a negative pressure safety valve and negative pressure equipment. The negative pressure safety valve comprises a valve shell, a valve seat, a valve element and an elastic piece. One end of the valve shell is used for being connected with negative pressure equipment so that the valve shell can communicate with the negative pressure equipment, the other end of the valve shell is provided with a first through hole communicating with the outside, and the valve seat, the valve element and the elastic piece are all arranged in the valve shell; the valve seat and the inner side wall of the valve shell are sealed, and the valve seat is provided with a pressing part. One end of the elastic piece is fixed, and the other end is connected with the valve core; the pressing part is provided with a second through hole, the pressing part, the valve element and the elastic piece are sequentially arranged in the direction away from the first through hole, and elastic force generated when the elastic piece deforms can drive the valve element and the pressing part to be pressed and sealed. The scheme can adapt to negative pressure equipment with different vacuum degree requirements by adjusting the pre-tightening force of the elastic piece, and is suitable for pipelines or equipment needing vacuum during normal operation or work.