16results about How to "Improve the pumping effect" patented technology

A dissecting support is installed on a base in a lifting mode, an operating device for driving the dissecting support to integrally ascend and descend or obliquely ascend and descend is arranged on the base, a dissecting table is fixedly installed on the dissecting support, a containing cavity is formed in the dissecting table, and an opening communicated with the containing cavity is formed in the dissecting table. An inclined slope with the upper end inclining outwards is arranged on the dissecting table and located at the edge of the opening, an upper aspirating hole is formed in the inclined slope, the opening of the dissecting table is sealed and covered through a cover plate for bearing the human body specimen, a drainage hole is formed in the cover plate, and a lower aspirating hole correspondingly communicated with the upper aspirating hole is formed in the dissecting table and located below the cover plate. The lower air exhaust hole is located in the containing cavity, one end of the dissecting table is provided with an air exhaust main connector communicated with the containing cavity, the air exhaust main connector is connected with a negative pressure system, an opening and closing structure is arranged in the air exhaust main connector, and a liquid leakage opening capable of being opened and closed is formed in the bottom of the containing cavity. According to the dissecting table, the table top of the dissecting table can be lifted, the dissecting table can be inclined vertically, and flexibility during dissecting is improved.

The present invention discloses an over-compression elimination device and a variable pitch screw vacuum pump, comprising a valve body, a valve stem movably connected in the valve body; the valve body has an inlet and an outlet; a valve cover is installed on one side of the outlet of the valve body, one end of the valve stem is connected to the valve cover, and the other end of the valve stem extends along the axial direction of the valve body to the inlet side of the valve body; the inlet end of the valve body of the elimination device is connected to the pressure chamber of an external mechanism. The over-compression elimination device of the present invention keeps the valve stem and the valve body sealed at all times by a retaining member. When the pressure in the pump chamber connected thereto is over-pressured, the pressure of the compressed air offsets the restoring force of the retaining member to drive the valve stem to move, so as to achieve communication with the outside world, thereby achieving pressure relief. This structure effectively reduces the exhaust temperature and shaft power consumption of the variable pitch screw vacuum pump, and improves the operating efficiency, reliability and air extraction performance.

The utility model relates to the technical field of vacuum pumps, in particular to a vacuum pump with an active noise reduction structure, which comprises a pump body, a bottom plate fixed at the bottom of the pump body, a pump cover mounted on one side of the pump body, an air suction pipe fixed on one side of the top of the pump cover, and an air outlet pipe arranged on one side of the air suction pipe and communicated with the pump cover. An impeller is rotationally connected into the pump cover, and a water ring is installed in the pump cover. According to the utility model, the air exhaust capacity of the vacuum pump in use is improved, the use effect of the vacuum pump is better, the sealing effect of the vacuum pump in use is improved, and noise interference to the surroundings is not easily caused.

The utility model discloses a swimming pool cleaning robot capable of enhancing the water channel cleaning effect. The swimming pool cleaning robot comprises a robot body, a sealing cavity and a water pumping cavity. Wheels are arranged at the bottom of the machine body, and a rolling brush is arranged at the front end. A garbage inlet is formed in the bottom of the machine body; a cleaning opening is formed in the position, corresponding to the garbage inlet, of the bottom of the sealing cavity. A water pumping opening is formed in the top of the side wall of the sealing cavity; the water pumping opening and the side wall of the sealing cavity are integrated; the water pumping cavity is arranged in the machine body, and water pumping fan blades are arranged in the water pumping cavity; the water inlet end of the water pumping cavity communicates with the water pumping opening, and the water outlet end of the water pumping cavity communicates with the outside. According to the swimming pool cleaning robot, the water absorption capacity is enhanced, and the cleaning effect is good.

The utility model discloses a sealing machine, which belongs to the technical field of sealing devices, solves the problem of water inflow risk of a negative pressure switch in the existing sealing machine, and adopts the technical scheme that the sealing machine mainly comprises a body, the body is provided with a sealing part and a cavity with an opening, and the sealing part seals the cavity to enable the cavity to form a sealing cavity. A negative pressure switch and a vacuum pump are arranged in the body, the cavity is provided with a first channel and a second channel, the negative pressure switch is communicated with the cavity through the first channel, the vacuum pump is communicated with the cavity through the second channel, the first channel is provided with a detection port located in the cavity, and the second channel is provided with an extraction opening located in the cavity. The distance between the detection opening and the bottom wall of the cavity is larger than the distance between the extraction opening and the bottom wall of the cavity. The negative pressure switch is mainly used for reducing the possibility that water enters the negative pressure switch.

The utility model provides an oil way filter which comprises a shell, a filter element and a filter element seat, an oil inlet and an oil outlet are formed in the top of the shell, a plurality of lifting bolts are further installed on the filter element seat, the filter element seat is installed above the shell, the ends of the lifting bolts are fixed to the shell, the filter element is located in the shell, and the filter element is installed at the bottom of the filter element seat. The filter element seat comprises an insertion part, the insertion part is generally in an inverted cone frustum shape, a first sealing conical curved surface is formed on the peripheral surface of the insertion part, a second sealing conical curved surface is formed on the top of the inner wall of the corresponding shell, the insertion part is inserted into the shell, and the first sealing conical curved surface is tightly attached to the second sealing conical curved surface. According to the oil way filter, the filter element can be taken out upwards under the condition that peripheral pipelines are not disassembled, the filter is visual and simple to clean and maintain, the workload is small, and misoperation can be avoided; the shell is left on the pipeline, so that oil overflowing can be effectively reduced, and pollution to a working site is avoided; and the filter element seat is more convenient to disassemble and fasten through the lifting bolt.

The invention relates to the technical field of wastewater deamination, in particular to a multi-stage flash evaporation deamination system and process. The multi-stage flash evaporation deamination system comprises a multi-stage flash evaporation deamination tower, the multi-stage flash evaporation deamination tower is connected with a Venturi water ejector through a pipeline, and a condenser is arranged on the pipeline between the multi-stage flash evaporation deamination tower and the Venturi water ejector. According to the invention, wastewater deamination and ammonium sulfate preparation processes can be realized, a plurality of flash steam condensers are additionally arranged on the basis of existing multistage flash heat pump rectification deamination, the condensers can condense flash steam before the flash steam enters the Venturi water jet pump, the jet water quantity required by the Venturi water jet pump is reduced, the power of a circulating pump is reduced, and the energy consumption is reduced. The air exhaust capacity of the Venturi water ejector is improved, so that the flash evaporation capacity of the flash evaporation section is further improved, the deamination effect is improved, and meanwhile, the operation energy consumption in the deamination process can be greatly reduced.

The invention discloses a mixing and fermentation device for feed production in the technical field of feed production, the mixing and fermentation device comprises a fermentation tank, a feeding device and an air exhaust assembly, the feeding device comprises a shell, a feeding port is formed in the bottom of the shell to be communicated with the fermentation tank, and a feeding port is formed in the top of the shell; the air exhaust assembly comprises a flexible belt arranged in the shell, the flexible belt is provided with an opening communicating with the feeding port and the feeding port, an air exhaust rod is arranged on the upper wall of the shell, one end of the air exhaust rod extends to the upper end of the shell, the other end of the air exhaust rod extends into the flexible belt and is used for pre-compressing raw materials to extrude out internal air, and a third driving part for driving the air exhaust rod to rotate is further arranged on the shell. A flexible bag is arranged for pre-storing the raw materials, then an air exhaust rod is arranged to stretch into the flexible bag for air exhaust, the air exhaust rod can be provided with a plurality of air exhaust points in a distributed mode, in cooperation with the tightening and compressing functions of the flexible bag, the air exhaust effect can be greatly improved, and a large amount of oxygen in gaps of the raw materials can be discharged easily; and the subsequent chemical oxygen removal cost is reduced.

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.

A straw indirect carbonization-based soil improvement method and system, the method comprising the following steps: (A) collecting straw, cutting the straw into straw particles; (B) extruding and destroying the surface of the straw particles; (C) using microwave heating to extrude the straw particles, obtaining puffed straw particles; (D) carbonizing the surface of the puffed straw particles, obtaining carbonized particles for discharge into soil. The indirect carbonization method of first breaking the wall and then puffing and carbonizing the surface can significantly reduce the energy consumed during carbonization and shorten the processing time of the straw, which is conducive to the straw carbonization and field application treatment of a large area of soil. At the same time, the surface-carbonized carbonized particles can provide sufficient biomass carbon for the soil, and it is not necessary to remove part of the carbonized particles from the field due to the excessive biomass carbon of the soil. In addition, the carbonized particles also well retain the nutrients in the straw.

The utility model discloses an efficient oil smoke pumping and exhausting system of an integral kitchen, which comprises a cooking bench and a plurality of cooking utensils arranged on the cooking bench, a plurality of cooking stove cores are arranged on the cooking utensils, a range hood is arranged above the cooking utensils, the range hood comprises a casing and an exhaust fume collecting hood which are communicated with each other, a fan is correspondingly arranged in the casing above each cooking stove core, and the exhaust fume collecting hood is arranged in the casing above each cooking stove core. Every two adjacent fans are separated by a partition plate, a temperature sensor and a photoelectric smoke sensor are mounted on the exhaust fume collecting hood above each stove core, a circle of annular groove is formed in the stove around each stove core, an air inlet is formed in the bottom of the annular groove, an annular sealing cover is arranged at the top of the annular groove, and a plurality of air outlets are uniformly distributed in the circumference of the sealing cover. In conclusion, the range hood has the advantages of being capable of accurately exhausting smoke, saving energy and being good in oil smoke pumping and exhausting effect.

The present application relates to the technical field of turbo molecular pump, in particular to a kind of turbo molecular pump blade, turbo rotor and turbo molecular pump.Turbo molecular pump blade, the pressure surface and suction surface of blade body are both curved surface, the thickness of the blade body gradually decreases from root to top, the blade thickness of the blade body root is 3.5mm-4.5mm, the blade thickness of the blade body top is 1.5mm-2.5mm, the inlet angle of the blade body is 25°-35°, the outlet angle of the blade body is 40°-50°, the blade inclination of the blade body is 0°-20°.Design as smaller inlet angle and larger outlet angle, can improve the ability of capture, discharge and reverse to prevent backflow to the gas pumping capacity.In the case where other parameters are the same, it can improve the pumping speed and compression ratio of turbo molecular pump, can greatly improve the pumping capacity of turbo molecular pump under low pressure working condition.

The invention discloses a high-vacuum multi-layer heat insulation double-wall vacuum pipeline sealing structure suitable for an LNG (Liquefied Natural Gas) ship. The structure comprises a prefabricated pipe section and an assembly pipe section, the prefabricated pipe section is provided with an interlayer, and the interlayer is provided with a sealing assembly and a first vacuumizing assembly; the assembling pipe section comprises a pre-tightening spring assembly, an interlayer conduction operation assembly and an outer pipe assembly, the pre-tightening spring assembly is arranged on the inner side of the outer pipe assembly and connected with the sealing assembly, and the interlayer conduction operation assembly penetrates through the outer pipe assembly and is connected with the pre-tightening spring assembly; the interlayer conduction operation assembly can drive the sealing assembly to move through the pre-tightening spring assembly. According to the structure, a mature land vacuum pipe production process, namely a high-vacuum multi-layer heat insulation production process, can be applied to the marine vacuum pipeline, so that the vacuum service life of the high-vacuum double-wall pipeline for the LNG ship is remarkably prolonged, a large amount of evacuation time is saved, and the vacuum heat insulation performance of the pipeline can be guaranteed.

The utility model relates to motor technical field, concretely is a kind of shielded pole motor for water pump, including connecting plate, motor mechanism, water pump mechanism and connecting support mechanism, the motor mechanism is fixedly connected in the inside of connecting plate, the motor mechanism includes fixedly connected in the inside of connecting plate machine.The utility model in the present application, when the running winding of motor is electrified to produce alternating magnetic field, short-circuit ring will induce current, the magnetic field produced by this current and the magnetic field produced by running winding interact, thereby producing rotating magnetic field, drive motor rotor rotation, bearing reduces rotating shaft rotation friction, improves transmission efficiency, wind wheel rotates under the driving of rotor, so that the heat generated by motor can be taken away with air convection, thereby dissipating to surrounding environment, effectively reduce motor temperature, cooperate with mesh cover, effectively improve the heat dissipation performance of motor, reduce motor operating temperature, prolong the service life of motor.

The present invention relates to the technical field of flywheel casting, and specifically to a flywheel casting mold, comprising an upper mold and a lower mold, and also comprising an upper air-exhausting member, the upper air-exhausting member comprising a rotating cylinder 1 rotatably arranged on the upper mold, the rotating cylinder 1 being provided with an air-exhausting hole 1, the bottom of the rotating cylinder 1 being provided with an extrusion sleeve, and a sealing block 1 elastically installed in the rotating cylinder 1 and slidably connected with the extrusion sleeve; a lower air-exhausting member, the lower air-exhausting member comprising a rotating cylinder 2 rotatably arranged on the lower mold, the rotating cylinder 2 being provided with an air-exhausting hole 2, the rotating cylinder 2 being provided with a rectangular guide rod, and the sealing block 2 being elastically installed on the rectangular guide rod; and a locking mechanism, the locking mechanism comprising a handle 1 slidably arranged on the upper mold and a handle 2 arranged on the lower mold, the handle 2 being provided with a limiting mechanism for limiting the movement of the handle 1, the rotating cylinder 1 being provided with a gear, and the handle 1 being provided with a guide column for driving the gear to rotate. The present invention can improve the air-exhausting effect, effectively and timely extract the air in the casting cavity, and can maintain the stability of air-exhausting.

The embodiment of the utility model provides a liquid injection device, liquid injection equipment and an electric box production line. The liquid injection device comprises a body, an exhaust pipe, a liquid injection pipe and a filter part. The body comprises a first containing cavity with a first opening, the first opening is used for being communicated with the interior of an electric box, and the body is provided with a first mounting hole and a second mounting hole which are communicated with the first containing cavity. One end of the exhaust pipe is mounted in the first mounting hole, and the other end is connected with negative pressure equipment. The liquid injection pipe is inserted into the second mounting hole and comprises a first section and a second section which are connected with each other, at least part of the first section is arranged in the first containing cavity, and the second section is used for being connected with the containing device. The filtering piece is arranged in the first containing cavity and is configured to allow gas to pass through and block liquid to pass through when the exhaust pipe extracts air in the first containing cavity. The liquid injection efficiency of the electric box is improved.