69results about How to "Change the pressure" patented technology

The invention relates to the technical field of 3D printing, in particular to a 3D printing charging tray and an exposure stripping technology of the 3D printing charging tray. The 3D printing charging tray comprises a base, a releasing film, light-transmitting glass and a clamping plate. The base is provided with a first groove and a second groove, the first groove and the second groove penetratethrough the top end face of the base, the light-transmitting glass is arranged in the first groove, the upper surface of the light-transmitting glass is higher than the bottom wall face of the secondgroove, the release film is arranged on the top end face of the base and is pressed between the base and the clamping plate, a first cavity is defined by the release film, the inner wall of the firstgroove and the light-transmitting glass, a second cavity is defined by the release film and the inner wall of the second groove, and the two cavities communicate. During exposure, the cavities are pumped to from negative pressure, the release film can be tightly attached to the glass, bubbles do not exist between the release film and the glass, tensioning of the release film is achieved, the printing precision is improved, when the release film is released, air is inflated to the cavities, the cavities form positive pressure, the release film and the light-transmitting glass are stripped, andthe aim is easily achieved.

The invention relates to a greenhouse crop irrigation system and method with an ideal regulation and control effect. The greenhouse crop irrigation system is characterized by comprising a bracket, a water accumulation device, an irrigation pipe network, a waterhead lifting device and a controller; the bracket is formed by connecting four lower support columns and four upper support columns through inserted links and circular holes; the water accumulation device comprises a water tank fixed on the top end of the bracket, a sensor for monitoring the water level height is arranged in the water tank, a water delivery header pipe is connected to one side of the water tank and the other side of the water tank is communicated with the irrigation pipe network; the irrigation pipe network comprises a branch pipe and a plurality of capillary pipes arranged on the branch pipe at intervals, wherein the tail ends of all the capillary pipes are connected with an air exhaust pipe; a plurality of irrigation emitters are arranged on each capillary pipe at intervals, wherein a plurality of capillary pipe bundles are arranged in an irrigation pipe at the lower part of each irrigation emitter; a humidity sensor is arranged in soil below the irrigation emitters; the waterhead lifting device consists of a pulley block and a water tank digging rope connected with the water tank; and the controller is respectively and electrically connected with the water level sensor, a water intake valve and the humidity sensor. The greenhouse crop irrigation system and method can be widely applied to the irrigation process of various greenhouse crops.

Relating to the technical field of medical supplies, the invention discloses a medical disinfection device for surgical supplies. The device includes an outer box body, the lower surface of the outerbox body is fixedly connected to a pedestal, the center at the upper surface of the pedestal is fixedly connected to an inner box body, the inner box body is located inside the outer box body, the upper surface of the pedestal is provided with a placement groove, and the inner wall bottom of the placement groove is fixedly connected to a heating plate, and the pedestal is internally provided withtwo water channels respectively. The medical disinfection device for surgical supplies utilizes the water channels, water inlet pipes and nozzles to cause water impact to the heating plate so as to reach the effect of generating high temperature steam. The sterilizing device uses a holding net to support articles, so that disinfection can be more comprehensive and thorough. By controlling the movement of a movable plate, the air pressure between the outer box body and the inner box body can be changed, thus reaching the effects of changing the blocking of flow limiting plates on water flow, effectively controlling the volume of produced high temperature water vapor, and reducing waste of resources.

The invention discloses a manipulator system. The manipulator system comprises a mounting seat, magnetic attraction devices, vacuum adsorption devices and a control box, wherein the mounting seat is connected to a mechanical arm; the magnetic attraction devices are arranged on one side of the mounting seat for adsorbing bowl-shaped caps; the vacuum adsorption devices, corresponding to the magneticattraction devices one by one, are arranged on one side far from the magnetic attraction devices for adsorbing rubber blocks; and the control box is used for controlling magnetism of the magnetic attraction devices and on and off of gas circuits of the vacuum adsorption devices. By adopting a novel mechanical structure, the manipulator system has the advantages and effects that the bowl-shaped caps and rubber blocks are transferred in batches through the magnetic attraction device and the vacuum adsorption devices, so that the production efficiency of the hardware cap finished products is improved.

The invention discloses a measuring device and a measuring method for constructional engineering investigation, and belongs to the technical field of constructional engineering investigation. The measuring device can be buried in a foundation for a long time for strength detection through a pre-burying mode, and the detection means is mainly a gravity extrusion effect of a bipolarity pressure ball on a liquid isolation film. Pressure in a pre-buried cylinder is changed to force a pressure change film to expand towards the outer side. A self-breaking rod is broken by pulling, a self-luminous floating ball gets close to the bipolarity pressing ball and makes contact with the bipolarity pressing ball under the action of magnetic attraction after being recovered to be free, the self-luminous floating ball can trigger a light emitting phenomenon after making contact with the liquid isolation film and being squeezed, different self-luminous floating balls release light of different colors, and the light is sequentially conducted to an outer developing rod. A technician can regularly observe the color and the intensity of internal light through the outer color developing rod every day so as to judge the intensity change of the foundation. Compared with an existing measuring device, the measuring device can carry out measurement autonomously, information is fed back in a light emitting mode, and the measuring device is quite efficient and intuitive, and can be used for night illumination so as to save electricity.

A new type pier structure with liquid bearing is composed of exterior-protected construction, liquid, bracket, pressure sensor and basic. The exterior-protected construction contains metal frame and film with liquid filling inside. The bracket connects with upside structure of bridge from upper, contacts liquid from bottom and closures liquid in exterior-protected construction entirely. Pressure sensor is located on below surface of bracket to monitor hydraulic pressure. The basic is below the exterior-protected construction and appears tree radiation. It can joint to exterior-protected construction as a whole, be composed of metal frame and film or be poured by reinforced concrete. The invention has merits of rational stress, convenient construction, saving materials, reducing deadweight, low cost and long life-span. It can also realize teal-time and long-distance monitoring on working conditions of piers. Monitoring data accumulated after operating have great value for calculating bridge and perfecting design theories.

The invention provides an argon excitation system of a spectrograph. The argon excitation system comprises a strong blowing air channel, a main air channel, a side air channel, a public air channel and a shutter control air channel, wherein all the air channels are arranged on an integrated air channel plate of the argon excitation system of the spectrograph; an air source is arranged at an airstream inlet of the strong blowing air channel, and an airstream outlet of the strong blowing air channel serves as a first air outlet; the air source is arranged at an airstream inlet of the public air channel and is connected with the shutter control air channel, an airstream inlet of the main air channel is formed in the public air channel and is provided with an argon meter, and an airstream outlet of the main air channel serves as the first air outlet; an airstream inlet of the side air channel is formed in the public air channel, and an airstream outlet of the side air channel serves as a second air outlet; the airstream outlet of the shutter control air channel serves as a third air outlet; the air channels are respectively at least provided with an electromagnetic valve. The argon excitation system provided by the invention has the advantages that the pressure is changed, design of different air channels is available, the gas tightness is good, and the precision of the argon excitation system is improved.

The rotary whitewashing device comprises a connecting bottom plate, a plurality of mounting blocks are fixedly connected to the side wall of the connecting bottom plate, a pair of supporting vertical rods are fixedly connected to the surface of the connecting bottom plate, sliding rings are movably arranged on the surfaces of the supporting vertical rods, and an arc-shaped supporting plate is arranged on one side of each sliding ring; the outer wall of the arc-shaped supporting plate is fixedly connected with a welding rod, the welding rod is fixedly connected with the surface of the sliding ring, the inner wall of the arc-shaped supporting plate is provided with a pair of limiting grooves, the limiting grooves are symmetrically formed, a buffer plate is arranged between the limiting grooves, and one end of the movable shaft abuts against the side wall of the buffer plate; compared with the prior art, through deformation of the elastic extrusion cavity, the internal pressure intensity of the elastic extrusion cavity can be changed, the flow speed of whitewashing liquid can be changed, the surfaces of trees can be sprayed according to different conditions, uniform spraying of the surfaces of the trees can be guaranteed, and the situation that the surfaces of the trees are sunken, so that whitewashing is locally omitted is reduced; and the uniformity of the coating can be ensured.

The invention relates to a rotary cultivator. The rotary cultivator comprises a machine frame, a walking assembly arranged at the bottom of the machine frame, a rotary cultivator body connected with the machine frame and a supporting rotation device connected with the machine frame, and the supporting rotation device can drive the machine frame to drive the walking assembly to move in the verticaldirection, so that the walking assembly is driven to rotate in the horizontal plane. According to the rotary cultivator provided by the invention, the technical problem that in the prior art, a crawler belt of a rotary cultivator is prone to sinking when working in a deep muddy foot paddy field is solved.

The invention discloses an automobile-used rigidity adjustable magneto-rheological damper and a rigidity adjusting method. An inner tube is arranged inside an outer tube, two layers of floating pistons are arranged on the position between the outer side wall of the inner tube and the inner side of the outer tube, the floating pistons divide the space between the outer tube and the inner tube intothree cavities from down to up, the three cavities are a hydraulic oil chamber, a floating air chamber and an adjusting chamber correspondingly, a spring in the adjusting chamber sleeve the inner tube, an upper end of the spring is further in contact with a baffle, and the baffle is connected with the upper edge of the outer tube through a dustproof cover; a hydraulic control device is connected to the bottom of the hydraulic oil chamber; a layer of floating piston is arranged inside the inner tube and divides the inner tube into a compensation air chamber and a magneto-rheological fluid cavity from down to up; a sealing end cover at the top of the inner tube seals the inner tube; and a piston assembly is arranged in the magneto-rheological fluid cavity, the piston assembly comprises a piston body, and a magnetic exciting winding and a winding protective layer wind the piston body. According to the automobile-used rigidity adjustable magneto-rheological damper and the rigidity adjusting method, rigidity and damping are adjusted according to driving conditions in a self-applying mode, so that the driving smoothness and operational stability are improved.

The invention provides a multi-hole tool anchor and further provides a prestress tensioning system of steel strands. The multi-hole tool anchor comprises an anchor plate seat body. A plurality of mutually-communicating cylinder bodies are arranged on the anchor plate seat body, tubular pistons are mounted in the cylinder bodies, and threading through holes are formed in the middles of the pistons.The prestress tensioning system of the steel strands comprises the multi-hole tool anchor. According to the multi-hole tool anchor and the prestress tensioning system of the steel strands, the multiple mutually-communicating cylinder bodies are arranged on the anchor plate seat body, in the use process, all the steel strands penetrate through the middles of power plugs, the power plugs are drivenby a cross-core jack to change the pressure intensity inside the cylinder bodies so as to push the pistons to move to achieve tensioning of the steel strands; the cylinder bodies mutually communicate, thus the pressures borne by all the pistons are completely the same, and thus it is ensured that tension stress on all the steel strands is consistent.

The invention relates to a pipette with high practicability, and relates to the technical field of pipettes. The pipette comprises a base plate, a tube body, a needle head, a tube cover, a fixing mechanism arranged on the base plate, a protection mechanism arranged on the needle head and a pipetting mechanism arranged in the tube body, the protection mechanism comprises a protection cylinder and a mounting plate, the protection cylinder is movably connected with the needle head, the other end of the protection cylinder is connected to the top of the mounting plate, the other end of the mounting plate is connected to the top of the base plate, the fixing mechanism comprises a stand column, a sliding ring, a clamping ring and a protection pad, the lower portion of the stand column is fixedly connected with the upper portion of the base plate, the pipetting mechanism comprises a piston block, a screw rod and an upper filter screen, the piston block is movably connected with the pipe body, the other end of the piston block is connected with the lower portion of the screw rod, a first mounting hole is formed in the center of the upper filter screen, and the screw rod is connected with the first mounting hole. In the invention, the sliding ring and the stand column are movably connected to change the height of the whole fixing mechanism, and the sliding column and the sliding rod are movably connected to change the position between the clamping ring and the pipe body.

The invention particularly relates to hard disk installation equipment for video data storage. The hard disk installation equipment comprises a bottom plate, a workbench and a lifting table. A supporting column is fixedly installed on the left side of the bottom plate. A top plate is fixedly mounted at the upper end of the supporting column; the lifting table is arranged below the top plate, a plurality of first air cavities and second air cavities are evenly formed in the bottom of the lifting table, the first air cavities are located on the outer sides of the second air cavities, and first sliding blocks are slidably installed in the first air cavities and the second air cavities and fixedly connected with the interiors of the first air cavities or the interiors of the second air cylinders through telescopic springs. The lifting table is arranged below the top plate; a plurality of first air cavities and second air cavities are uniformly formed in the bottom of the lifting table; thepressure in the first air cavities or the second air cavities is changed, so that the first sliding blocks slide in the first air cavities or the second air cavities to drive the electric screw driver to move, the electric screw driver accurately moves to a screw installation position of a hard disk, and the electric screw driver can install the hard disk conveniently.

The invention provides a special sealing tank for a heating and filtering type gastric lavage machine for medical operation, wherein the sealing tank comprises an upper cavity and a lower cavity. Thebottom of the upper cavity and the top of the lower cavity are provided with circular openings respectively. A connecting catheter and a cylindrical regulating block are arranged on an upper sealing cover, and an L-shaped catheter is arranged in the inner part of the cylindrical regulating block. A rotating handle is arranged at the top of the cylindrical regulating block, and the cylindrical regulating block can be rotated by rotating the rotating handle. When the L-shaped catheter in the cylindrical regulating block is connected with the connecting catheter, the connecting catheter can be connected with the upper chamber. When not in use, the rotating handle can be rotated to make the liquid outlet end of the connecting conduit connected with the outer wall of the cylindrical regulatingblock, so as to play a sealing role.