14results about How to "Increase negative pressure" patented technology

The utility model relates to the field of construction safety, concretely relates to a kind of for safety belt collocation multi-point adsorption type safety fixing device, including main frame, sucking disc, pressure outlet, pressure ware, power, connecting buckle, connecting rope, hook, alarm, the sucking disc evenly distributes in the bottom of the main frame, the pressure outlet is set in the side of one vertex of the main frame, the connecting buckle is set in the front of the main frame, the connecting rope connects the connecting buckle and hook, the pressure ware is set in the main frame and is connected with the sucking disc, the power is electrically connected with the alarm, pressure ware, after sucking disc and adsorption operating surface contact, the pressure ware empties the gas in the sucking disc by the pressure outlet. The adsorption, illuminating property, convenience, safety of the device provide better security guarantee for the safety of worker in construction site, more convenient in construction process, improve the safety index of construction site.

The application discloses an air passage structure and an electronic atomizer. The air passage structure comprises a plate body, a communication hole, a communication channel, a first air outlet and a second air outlet. The plate body comprises a first plate surface and a second plate surface facing away from each other. The communication hole, the first air outlet and the second air outlet are respectively arranged in the plate body and penetrate through the first plate surface and the second plate surface. The communication hole is used for communicating with the outside atmosphere. The communication channel is formed in the first plate surface and / or the second plate surface. The first air outlet is used for communicating with a suction nozzle of the atomizer. The communication hole, the communication channel and the first air outlet are sequentially connected to form a first air passage capable of connecting and awakening a sensing component of the atomizer. The second air outlet is used for communicating with a mist suction channel of the atomizer and the outside atmosphere. The second air outlet is connected to the first air outlet. The air passage structure can improve the sensitivity of awakening the sensing component to start.

The invention relates to a kind of emulsion extrusion equipment, including milking barrel, the head of the milking barrel is movably inserted with replaceable milking sleeve, the tail of the milking barrel is connected with horn barrel, the lower end of the horn barrel is connected with connecting pipeline, and the connecting pipeline is connected to the collecting barrel.By the structure of annular air bag, air pipe, adjusting cavity, elastic pull rope and elastic cylinder, when vacuum machine stops working or fails, the negative pressure in the elastic cylinder channel reduces, the adjusting cavity is dragged by elastic pull rope and is extruded to make gas enter annular air bag, so that annular air bag is inflated to strengthen the extrusion of elastic extrusion cylinder and isolation cylinder, can continuously clamp nipple and not fall, avoid negative pressure stop extrusion equipment from falling and cause pollution.

The utility model provides a range hood which comprises a fan, an exhaust fume collecting hood with a bottom inlet and a fan frame, the fan is fixed on the fan frame and communicated with the bottom inlet, the forward side of the fan frame comprises a front cover plate, a ventilation opening is arranged on the front cover plate, an air inlet of the fan is positioned on the forward side, and the air inlet of the fan is communicated with the ventilation opening. The inner side of the front cover plate is connected with an adsorption module used for adsorbing volatile organic compounds, an adsorption inlet of the adsorption module is exposed out of the ventilation opening, the height of the adsorption module is larger than that of the center line of the air inlet, and a closed inner space is formed in the fan frame to communicate with the bottom inlet and an adsorption outlet of the adsorption module. According to the utility model, on one hand, pollutants are adsorbed, so that air flow purification is realized, treatment of pollutants such as VOCs in a kitchen is realized, and the problems of peculiar smell in the kitchen and the like are solved; and on the other hand, the negative pressure of a local area is improved, the problem that the flow speed of the whole area of the air inlet of the fan is uneven due to size reduction of the fan frame is solved, air volume is increased, and rotating speed and noise are reduced.

This invention relates to an anti-cavitation device and method for fluid pipelines. The invention includes a fluid pipeline with a bend; a guide vane assembly disposed within the bend to guide the fluid flow at the bend; wherein the guide vane assembly includes a guide vane body, the guide vane body including guide vanes extending towards the outlet of the bend, the guide vanes being circumferentially arranged around the axis of the guide vane body, so that the fluid forms a controlled pre-swirling flow field before entering the bend outlet. This invention, by installing a guide vane-type device at the bend of the fluid system pipeline, changes the flow direction of the liquid, avoids abrupt changes in liquid velocity at the bend, eliminates boundary layer diversion, increases the absolute pressure inside the bend, and thus improves the cavitation resistance of the entire pipeline system.

This utility model discloses a conveying mechanism for a deburring and wire drawing machine, relating to the technical field of conveying equipment for deburring machines. The conveying mechanism includes a conveying platform, with a material feeding rack at one end for placing and conveying materials. A conveying device for moving the materials is installed on the conveying platform. The conveying device is connected to a power device for providing a power source, which is connected to the conveying platform. A support mounting plate is provided on one side of the conveying platform, and a connecting bracket for connecting the lifting device in the deburring machine is fixedly installed on the support mounting plate. Air intakes are provided on both sides of the conveying platform, and the two air intakes are interconnected, forming a negative pressure air duct. Negative pressure is transmitted to the surface of the conveyor belt through six independent spaces on the platform and small holes on the surface of the conveyor belt. The negative pressure suctions the workpiece being processed, achieving greater suction in localized areas with the same power negative pressure fan through regional adsorption, allowing for the adsorption of smaller workpieces to be ground.

This invention discloses a dust-proof wall sander, comprising: a mounting plate; an electric sanding disc connected to the front of the mounting plate, with a gap between the mounting plate and the sanding disc; a sanding hood surrounding the gap between the mounting plate and the sanding disc, forming a cavity; a negative pressure pipe connected to the back of the mounting plate, one end of the negative pressure pipe communicating with the cavity, and the other end connected to an external negative pressure pump; and a suction assembly for attracting sanding dust, the suction assembly including multiple suction tubes laid outside the sanding hood, the first ends of the multiple suction tubes being distributed around the outer periphery of the sanding hood, and the second ends of the multiple suction tubes communicating with an annular manifold, the annular manifold being connected to the negative pressure pipe via a connecting pipe. This invention avoids dust generation and meets the requirements of green construction.

The invention belongs to the technical field of electric appliances, and particularly discloses a pumping and discharging device and oil smoke pumping and discharging equipment. The pumping drainage device comprises a main fan, a mounting bracket and an auxiliary pumping drainage piece. A motor shaft of the main fan is coaxially connected with a transmission shaft; the transmission shaft extends out of an air inlet of the main fan; the mounting bracket is positioned outside the main fan; the auxiliary pumping and discharging pieces are installed on the installation support and at least two auxiliary pumping and discharging pieces are arranged around the transmission shaft at intervals, and the transmission shaft is in transmission connection with the auxiliary pumping and discharging pieces, so that rotation of the motor shaft drives all the auxiliary pumping and discharging pieces to rotate to form negative pressure in the direction away from the air inlet of the main draught fan. The oil fume pumping and discharging equipment comprises an oil fume collecting hood with an oil fume collecting cavity and a pumping and discharging device, the pumping and discharging device is installed on the oil fume collecting hood, and at least the installation support and the auxiliary pumping and discharging piece are located in the oil fume collecting cavity. According to the exhaust device and the lampblack exhaust equipment disclosed by the invention, the running negative pressure can be increased, the negative pressure action range can be enlarged, the smoke leakage probability can be reduced, and the lampblack exhaust efficiency and the lampblack exhaust effect can be improved.

The utility model discloses a hand -operated formula window opener belongs to window opener technical field. This kind of hand -operated formula window opener, including window body and window opening subassembly, window opening subassembly sets up at the outside of window body, and window body includes window frame, and the outer wall of window frame is equipped with the outer frame, and the inside mounting of outer frame has glass board, and the hinge articulates through between window frame and outer frame, and window opening subassembly includes a pair of mounting seat, and a pair of mounting seat all set up in the opposite side of window frame with outer frame, and the square tube is equipped with between a pair of mounting seat, and the square tube is all equipped with a pair of mounting plate in the outside close to both ends, and the rotatory joint of a pair of mounting plate has first corner box, and the bottom of first corner box installs the outer tube body, and the inner wall both sides of outer tube body all are seted up with the sliding slot, and the sliding joint of a pair of sliding slots has telescopic handle, and the inside screw thread connection of telescopic handle has screw rod, and the rotatory joint of screw rod one end with the inner top surface of outer tube body, and telescopic handle is at the end away from first corner box and is penetrated outer tube body to install the connecting piece, and the connecting piece is connected with glass board.

The utility model belongs to the field of octagonal hatching box machines, and particularly relates to a ventilation structure of an octagonal hatching box machine, which comprises a case, an air inlet pipeline is fixedly arranged in the middle of the case, air outlets are arranged on two sides of the upper end of the case, a water cooler is fixedly arranged in the middle of the inner side of the case, and a ventilation fan is arranged on the water cooler. A mounting frame is fixedly mounted in the case, a bearing seat is fixedly mounted at the upper end of the mounting frame, and a bearing is fixedly mounted in the bearing seat. The two air inlet pipelines are arranged in the middle of the machine body for air inlet, the two sides of the machine body for air outlet, and the bottoms of the air inlet pipelines extend to the positions close to the centers of the fan blades, so that the negative pressure of the air inlet pipelines is greatly increased, the air speed in the air inlet pipelines is greatly increased, and the uniformity of airflow in the equipment is optimized; and through uniform distribution of the water cooler structure from top to bottom, the water cooling effect is greatly improved, and the concentration of carbon dioxide in the machine body can be reduced.

Embodiments of the present application provide a control method, device and equipment of a surface cleaning robot and a readable storage medium. During the travel of the surface cleaning robot, if a leakage obstacle is encountered which causes the suction cavity to leak, the speed of the fan is increased to try to increase the negative pressure of the suction cavity. Then, when the negative pressure value of the suction cavity is higher than a preset negative pressure value, the surface cleaning robot re-plans a path to avoid the leakage obstacle and travels according to the re-planned path to continue cleaning the work surface. With this scheme, when the surface cleaning robot travels onto a leakage obstacle such as a mechanical baffle which cannot be detected, causing the suction cavity to leak, the speed of the fan is increased to restore the negative pressure of the suction cavity, and then the leakage obstacle is avoided to continue cleaning the work surface, thereby reducing the frequency of the surface cleaning robot alarming due to low negative pressure, and enabling the surface cleaning robot to complete the cleaning task as much as possible.

This invention discloses a 3D printing method and apparatus for the integrated molding of heterogeneous multi-component components, specifically relating to the fields of advanced manufacturing and intelligent microsystems technology. This invention overcomes the limitations of traditional multi-material 3D printing, which can only integrate electronic components and cannot embed drivers. It employs a dual-mode embedding method combining vacuum adsorption and pneumatic gripping, achieving integrated manufacturing of micro-drivers, electronic components, high-precision conductive lines, and structural substrates. By preparing wires through mask scraping, it solves the problems of low precision and difficulty in adapting to micro-circuits in direct writing, improving interconnect reliability and miniaturization level. The direct embedding of mature drivers avoids the polarization process and performance degradation issues required for direct printing of piezoelectric materials, ensuring stable and reliable driving performance. Through in-situ wire fabrication and a closed-loop printing process, it eliminates the risk of post-assembly errors and interconnect failures.

The utility model discloses a hand-cranking connecting rod type window opener, and relates to the technical field of window openers, the hand-cranking connecting rod type window opener comprises a window opening assembly, one end of the window opening assembly is provided with a transmission assembly, the window opening assembly comprises a base and a window opening connecting rod, one end of the window opening connecting rod is provided with an installation assembly, and the installation assembly comprises an installation seat. A hinge seat is arranged on one side of the mounting seat and hinged to one end of a window opening connecting rod, rotating seats are arranged at the two ends of the mounting seat, guide holes are formed in the rotating seats, second threaded rods are inserted into the guide holes in a penetrating mode, suckers are fixedly mounted at one ends of the second threaded rods, and rotary knobs are rotationally connected to the rotating seats. The knob is in threaded connection with the second threaded rod; the device can be stably and fixedly connected with a window door, a window frame does not need to be drilled, a user can conveniently crank a crank to control opening and closing of the window, and the device has high practical value.

The utility model discloses a curtain wall glass cleaning and maintaining hanging rack, which belongs to the field of curtain wall cleaning equipment, and comprises a hanging basket, a working steel wire rope and an elevator, an adsorption assembly is arranged outside the hanging basket, a driving air cylinder is arranged at one end of the adsorption assembly, a control electric box is arranged inside the hanging basket, and an anemograph is arranged at the top end of the hanging basket; the adsorption assembly comprises a suction cup, a connecting base fixedly arranged at the end, facing the driving air cylinder, of the suction cup, bonding glue fixedly arranged at the end, away from the driving air cylinder, of the suction cup, and a pulling block fixedly arranged on the outer wall of the suction cup. Through the design of the adsorption assembly, the driving air cylinder, the control electric box, the anemograph and the auxiliary assembly, real-time monitoring of the wind speed is conducted through the anemograph, when the wind speed is larger than an early warning value, a suction cup is pushed to a curtain wall for adsorption, the overall stability of the hanging basket is kept, large-amplitude shaking is avoided, air suction is conducted through an air suction pump, and the safety of the hanging basket is improved. And the adsorption force between the sucker and the curtain wall is enhanced.