14 results about "Positive pressure" patented technology

A water treatment system is provided including a disinfection system, a filter and a turbine generator. A manual pump is positioned downstream of the filter to create negative pressure to draw water through the filter. The manual pump also creates positive pressure to dispense treated water from the outlet of the system. The movement of the water through the system powers the turbine generator. The power generated can be used to monitor a characteristic of the water treatment system.

The invention belongs to the technical field of testing moving parts such as a membrane and the like, and more particularly discloses a multifunctional membrane testing device which comprises a test bench component, an electric control cabinet component and a pneumatic component; wherein, the electric control cabinet component comprises a power supply, a programmable controller (PLC) connected with the power supply and two intermittent on-off selective control valves which are respectively and correspondingly connected on two pins of the PLC; the pneumatic component comprises a high pressure air source, a moisture separator and two airflow branches formed by respectively connecting the moisture separator with the two selective control valves, wherein, one of the airflow branches is communicated with a positive pressure gas discharge pipe, and the other one is connected with a negative pressure generator and a negative pressure gas discharge pipe and communicated with the parts to be tested, so that negative pressure is formed for testing the parts to be tested by vacuum-pumping. The testing device can accurately control the negative pressure applied on the objects to be tested, meet the strain resistance and corrosion resistance tests of dynamic and static rubber mebranes, and accurately control the frequency, time and count of the movement of the mebrane without needing a person specially assigned for monitoring, thereby improving the working efficiency of the test and greatly reducing the energy consumption.

A chemical mechanical polishing apparatus and a chemical mechanical polishing method thereof are provided. The chemical mechanical polishing method at least includes the following steps. In step a, a positive pressure is formed between a polishing pad and a wafer. In step b, the wafer is driven to revolve around a first central axis. In step c, a polishing slurry is injected between the polishing pad and the wafer. In step d, the positive pressure formed on the wafer by the polishing pad is adjusted for change the contacting modes of the polishing pad and the wafer as well as the wafer removal rate.

The invention relates to the technical field of sewage treatment, and especially relates to a strong positive pressure spray aeration system. The system comprises an aeration tank having a hollow structure, nozzles, a water pump and an oxygen generator, the liquid phase inlets of the nozzles are communicated with the water outlet of the water pump through water inlet tubes, and the water inlet ofthe water pump is communicated with an aerobic tank; the water outlet of the nozzle is communicated with the inner chamber of the aeration tank, and the inner chamber of the aeration tank is formed byan upper atomization area and a lower high-oxygen water area; the outlet of the oxygen generator is communicated with the atomization zone; and a return tube is arranged at the lower part the sidewall of the aeration tank, one end of the return tube is communicated with the high-oxygen water area, and the other end of the return tube is communicated with the lower part of the sidewall of the aerobic tank. The strong positive pressure spray aeration system has the advantages of simple and complete structure, low price, wide aeration range, and uniform and rapid distribution of dissolved oxygen.

The invention discloses a positive-pressure liquid stopping clamp. The positive-pressure liquid stopping clamp comprises a sliding block and a body. The sliding block is installed on the body, the bottom of the sliding block is connected with a liquid stopping rod, the liquid stopping rod is put into a cavity of the body, an infusion table and a liquid stopping table are arranged at the bottom of the body, the infusion table is connected with the liquid stopping table, a positioning piece is arranged on the top face of the liquid stopping table, and the positioning piece and a fastening piece at the bottom of the liquid stopping rod are embedded. According to the positive-pressure liquid stopping clamp, when infusion is completed, the sliding block on the positive-pressure liquid stopping clamp is pushed to the positioning piece, and the liquid stopping clamp is in the closed state accordingly; in the process that the sliding block is pushed, an extension tube of a remaining needle is gradually compressed, liquid in the extension tube is extruded in the guide tube direction of the remaining needle, positive pressure is generated accordingly, blood is stopped to be backed flow to a remaining guide tube, forming of thrombus in the remaining guide tube is avoided accordingly, nursing services are reduced, the medical quality is improved, and medical cost is saved.

The invention belongs to the petroleum equipment technical field and discloses an oil drilling motor. The oil drilling motor includes a base, a controller and miniature infrared cameras; the base is provided with a motor main body; the motor main body includes a main shaft, a rotor assembly, a carbon brush, a cast aluminum electric heating plate, an oblique brush holding assembly and a brush holding clamp which is arranged through bolts; a junction box assembly is arranged to one side of the motor main body; an explosion-proof tube and an explosion-proof tube are arranged between the junctionbox assembly and the motor main body; the junction box assembly is of a positive pressure explosion-proof structure; the upper right corner, the lower left corner, and the lower right corner of the motor main body are respectively provided with the miniature infrared cameras respectively; transparent protective hoods are disposed outside the miniature infrared cameras respectively; the output endsof the miniature infrared cameras are connected with the input end of the controller; and the output end of the controller is connected with an LED display. The oil drilling motor of the present invention has the advantages of strong overload capacity, high reliability, easiness in maintenance and the like.

The invention discloses a drainage pump station air outlet end positive-pressure water drainage device. The water drainage device is arranged in a drainage pump station, and comprises a floating balland a piston, and the piston and the floating ball are connected through a connecting part. A water inlet is formed in the top of the drainage pump station, and a water outlet is formed in the bottomof the drainage pump station. A water outlet pipe is arranged on the water outlet, and is a right-angled L-shaped pipeline. The end, located in the drainage pump station, of the water outlet pipe is of a vertically upward structure, and the piston is arranged at the end of the water outlet pipe. Water drainage can be carried out in time according to the water amount in the drainage pump station.

The invention discloses a barrel foundation capable of sinking through blasting and a using method thereof. The barrel foundation comprises a steel portion, a concrete portion and explosive installation holes. In use, a blasting scheme is made first, then land fabrication and explosive filling are conducted, the explosive installation holes are numbered and grouped in sequence according to the blasting scheme, the device is transferred to an installation site, a first set of explosive is detonated after the device is stabilized according to the blasting scheme to enable the device to sink under the action of its own dead weight after blasting, a second set of explosive is detonated after sinking becomes stable so that the device can sink again under the action of its own dead weight after blasting, and the operation is repeated till all explosive is detonated or the barrel foundation sinks to a specified depth. In this way, the marine barrel foundation can be placed and made to sink through blasting, the defect of the negative-pressure sinking technique or positive-pressure sinking technique that operation is affected by sea conditions greatly is overcome, the whole installation process can be controlled and regulated, offshore construction cost can be reduced, and offshore construction time can be shortened.

The invention provides a single-pump feeding system, and relates to the field of automated devices. The single-pump feeding system comprises a glue storage cavity. A glue outlet device and a glue inlet device are arranged on the end portions of the glue storage cavity correspondingly. The glue outlet device, the glue inlet device and the glue storage cavity are of a communicating structure. When the glue outlet device is opened, the glue inlet device is closed. When the glue outlet device is closed, the glue inlet device is opened. A feeding cylinder is arranged at the other end of the glue storage cavity and communicates with the glue storage cavity. Positive pressure or negative pressure can be generated in the glue storage cavity through the feeding cylinder. Glue liquid can be conveyedin the vacuum state.

The invention discloses a positive-pressure infusion joint with fine filtration. The positive-pressure infusion joint with the fine filtration comprises an infusion pipe and further comprises a positive-pressure joint arranged at one end of the infusion pipe and a precision filter arranged in front of the positive-pressure joint. The precision filter can reduce the content of bacteria, and therefore the probability of occurrence of infection and various complications is reduced, twice as much can be accomplished with half the effort by combining the precision filter and the positive-pressure joint, and the positive-pressure infusion joint with the fine filtration is especially suitable for patients needing long-term infusion.