51results about How to "Uniform pumping" patented technology

The invention relates to a drilling-explosion-pumping triadic gas extraction method, which is most suitable for regional gas extraction of a high gas and low permeability coal seam. The method comprises the following steps: alternately arranging hole positions of drainage holes and blast holes of an along bed or a cross seam on a coal seam in front of a coal mining or tunneling working surface; and performing construction work on the drainage holes one by one, and performing blasting operation, wherein through the edgetone effect of denotation gas in the blast holes, a columnar compression crushing circle and a crack body which passes through and blasts in the direction of a line of centers of the blast holes and the extraction holes are generated on the periphery of a blasting hole to transfer the ground stress, improve the gas permeability of a coal body, relieve the pressure in a coal body and facilitate for drainage of gas in the coal body. The gas permeability of the coal body can be improve by around 20 to 50 times, the gas extraction quantity of haplopore can be increased by 5 to 10 times averagely, the gas extraction concentration is more than or equal to 50 percent, and the gas extraction rate of a robbing working surface is more than or equal to 80 percent. After pressure releasing and permeability improving of drilling, explosion and pumping, the gas pre-extraction time can be shortened by half, and the number of drilling holes of gas extraction is decreased by 20 to 30 percent; and the method achieves safe, high-efficiency and uniform extraction of the gas in the high gas and low permeability outburst coal seam.

The invention relates to a steam sterilizing process for the disinfection of medical appliances in hospital, and the steam sterilizer employing the steam sterilizing process, which comprises the steps of vacuumizing, preheating, sterilizing and cooling down. The steam sterilizer comprises a steam sterilizing box, a valve group, an air filter, a steam generator, a vacuum pump and an automatic control system.

The invention discloses a sealing cover for a circular pond body of a synchronous-rotation reverse hanging membrane structure. The sealing cover comprises a girder and a circular track beam. The girder is in rigid connection with the circular track beam. Upward-arch truss beams are connected between the circular track beam and the girder in a spaced mode. A connecting truss beam is arranged between every two adjacent upward-arch truss beams. The girder, the circular track beam, the upward-arch truss beams and the connecting truss beams form a rigid support. A sealing membrane is fixedly arranged on the lower face of the rigid support in a reverse hanging mode. The periphery of the sealing membrane falls naturally and forms a sliding sealing face with a concrete walkway plane of the circular pond body. Bearing travelling wheels are installed on the lower edge of the circular track beam. The sealing cover is further provided with a gas collecting device for collecting gas inside the circular pond body. The gas collecting device collects gas inside the pond body in the mode of middle shaft air and peripheral air supplementation. The sealing cover is rapid to install, good in mobility, long in service life and applicable to any large-span pond body, and reduces occupation of a site.

The invention discloses a pulsed steam sterilization process suitable for sterilizing medical equipment and a steam sterilizer for the steam sterilization process. The sterilization process comprises the following steps of vacuumizing, preheating, sterilizing, performing vacuum drying and the like. The steam sterilizer comprises a steam sterilization box, a valve bank, an air filter, a steam generator, a vacuum pump and an automatic control system. Compared with the prior art, the invention has the advantages that: by the pulsed steam sterilization process and the steam sterilizer thereof, a sterilization apparatus can be transported without packaging, the temperature raising and reduction time of the sterilization is shortened, the sterilization time of the apparatus is shortened, the labor intensity of medical care personnel is reduced, and the disinfection and sterilization are more complete and have a better effect.

An object of this invention is to provide a vacuum pump having shaft seals that prevent corrosion due to corrosive gas and further ensure smooth operation.

A shaft seal structure (17) is provided around an outer circumferential surface of the bearing member (16M, 16FM) located on the cylinder inside of each of the screw rotors (13M, 13FM). The shaft seal structure (17) forms a static pressure seal. A seal gas is introduced between the outer circumferential surfaces of the bearing members (16M, 16FM) and the inner circumferential surfaces (7) of the rotor cylinders of the screw rotors (13M, 13FM) through the bearing members (16M, 16FM).

This invention relates to an etching device in the process of semiconductor wafers including a reacting chamber with an inlet and a pumping chamber with an air vent, in which, said pumping chamber is set under the reacting chamber connected with symmetrically arranged left ventilation channel and a right ventilation channel and said air vent and the inlet are at the same axes and arranged symmetrically, so the gas above the static chuck surface flows to either side symmetrically and realizes uniform pumping to the reacting chamber.

The invention discloses a horizontal enameling machine drying oven with a superwide furnace which comprises furnace and heat irradiation equipment arranged in the furnace, wherein, the upper part of the furnace is provided with a catalytic combustor and a catalytic post suction and discharge room which are communicated. Two ends of the catalytic combustor are provided with an air inlet and an air outlet, a heat exchange room is arranged on the periphery of the catalytic post suction and discharge room, and the furnace is separated from a solvent suction and discharge area in the middle. The horizontal enameling machine drying oven is characterized in that more than two air inlets are arranged in the solvent suction and discharge area and the air inlet of the catalytic combustor is respectively communicated with the air inlets at the ends of the furnace and in the solvent suction and discharge area. A multi-channel air-flow distribution device is arranged in the catalytic post suction and discharge room and comprises a solvent distillation channel, the left and right sides and the back end of the channel are all provided with stream inlets, and the middle part thereof is provided with an air flow demarcation strip; and a pump line provided with an exhaust fan is arranged on the periphery of the air flow demarcation strip and communicated with the solvent distillation channel. The horizontal enameling machine drying oven has reasonable structure, uniform airflow direction and temperature, energy conservation and environmental protection, and good popularization value.

The invention discloses a vacuum pump with a special-shaped cavity; the vacuum pump comprises a stator and a rotor; wherein the stator is a cylinder body provided with a special-shaped cylindrical-surface inner cavity, an inlet and an outlet; the special-shaped cylindrical-surface inner cavity is formed by two arc surfaces and two non-arc surfaces; the rotor is formed by a rotor body and two pairs of combination slide plates; the rotor body is a circular cylinder body provided with a transmission shaft, a centering shaft and a crossed guide groove; the two pairs of combination slide plates are vertically arranged in the guide groove; a cover plate is a flat plate provided with a bearing hole; the two end faces of the stator are matched with the cover plate to form into a sealing cavity; the rotor is matched with the bearing hole on the cover plate by the transmission shaft and the centering shaft; the external drive couple drives the rotor to rotate by the transmission shaft. When the rotor rotates, the combined arc surface of the special-shaped cylindrical-surface inner cavity matches with the rotor to control the two pairs of combination slide plates to slide alternatively to intake air through the inlet and press air out through the outlet, thereby forming negative pressure in the inlet area.

The invention relates to an electrolytic tank cover for preventing and controlling acid mist. The electrolytic tank cover is a cube and is provided with long and short side walls and a top plate, and a netlike supporting structure is arranged on the inner surface of the cube; the netlike supporting structure comprises an air draft branch pipe arranged along the longitudinal central line of the cube and reinforcing ribs arranged on two sides of the air draft branch pipe at equal intervals; two side walls of the air draft branch pipe are provided with air draft holes; and the short side wall of the cube is provided with a hole, and the hole is communicated with the air draft branch pipe. The electrolytic tank cover has the characteristics of reasonable structural design, high strength, light mass, convenience in artificial lifting and detachment, high acid mist pumping efficiency, capability of realizing thorough prevention and control of the acid mist and the like.

The invention discloses a steel-structure double-layer glass curtain wall and belongs to the technical field of building decoration engineering. The steel-structure double-layer glass curtain wall comprises a steel support frame and a glass wallboard and is characterized by further comprising a solar vacuum heat collector composed of a heat exchange pipe, an aluminum heat absorbing plate and a glass box body, the aluminum heat absorbing plate is connected to the interior of the glass box body in a clamped mode, a first clamping layer and a second clamping layer are embedded in the steel support frame, a fixed frame is connected to one side of the steel support frame, a filtering plate in which an active carbon net layer is embedded is connected to the second clamping layer, reinforcing strips are distributed on the filtering plate and coated with titanium dioxide coatings, the glass wallboard comprises inner layer glass, a first connecting piece, a second connecting piece and outer layer glass, the first connecting piece is composed of a connecting column, a first rubber sucker and a second rubber sucker, and the second connecting piece is connected with the inner layer glass and the outer layer glass. The curtain wall is good in heat collecting effect and capable of effectively decomposing indoor harmful gas, and the whole curtain wall has good sound insulation and environmental protection effects due to the double-layer glass wallboard.

The invention discloses a gas compression pump with a special-shaped cavity. The pump comprises a stator and a rotor, wherein the stator is a cylinder with a special-shaped cylindrical surface inner cavity, an inlet and an outlet; the special-shaped cylindrical surface inner cavity is formed by combining two arc surfaces and two non-arc surfaces; the rotor consists of a rotor body and two pairs of combined sliding plates; the rotor body is a cylinder with a transmission shaft, a centering shaft and cross guide grooves; the two pairs of combined sliding plates are vertically arranged in the guide grooves; each cover plate is a flat plate with a bearing hole; the two end faces of the stator are matched with the cover plates to form a sealed cavity; the rotor is matched with the bearing holes in the cover plates through the transmission shaft and the centering shaft; an external driving couple makes the rotor rotate through the transmission shaft; and when the rotor rotates, the combined arc surfaces of the special-shaped cylindrical surface inner cavity are matched with the rotor, the two pairs of combined sliding plates are controlled to slide crosswise, gas is sucked into the inlet and pressed out of the outlet, and positive pressure is formed in an outlet area.

The invention relates to the technical field of full mold casting, in particular to a full mold casting smoke treatment device. The device comprises an exhaust cover box; the top of the exhaust cover box is connected with at least one exhaust pipe; the exhaust pipes are respectively connected with an exhaust fan; and a first metal filter screen, a refractory cotton layer, a refractory ceramic filter layer and a second metal filter screen are arranged in the exhaust cover box in sequence from top to bottom. The exhaust pipes are respectively provided with exhaust filter cylinders; and first refractory cotton layers, active carbon layers, second refractory cotton layers and third refractory cotton layers are arranged in the exhaust filter cylinder in an exhaust flowing direction. The first metal filter screen, the refractory cotton layer, the refractory ceramic filter layer and the second metal filter screen are arranged in the exhaust cover box in sequence from top to bottom for absorbing smoke and dust generated in the full mold casting process to optimize the workshop environment, so that the health of operators is effectively guaranteed, and meanwhile, the environment is protected.

The invention provides a vacuum adsorption switching gasket which structurally comprises a main body, a vacuum chuck, a switching gasket and a wafer, the main body and the vacuum chuck are of an integrated structure, and the switching gasket is installed at the upper end of the vacuum chuck; according to the invention, after the adapter gasket is further improved, when the adapter gasket is used, the replaced gasket can be used to be matched with the vacuum chuck after the adapter gasket is directly replaced, so that one vacuum chuck can complete adsorption of wafers of various sizes by replacing the gasket; and meanwhile, the auxiliary soft body arranged on the outer layer can effectively slow down the sliding performance of the wafer, and can operate at the same time according to the mutual cooperation of the suction head and the vacuum chuck, so that the balance effect is kept in the air exhaust process, the uniform air suction effect is further achieved, and the service life of the wafer is prolonged. Therefore, the phenomenon that a smooth wafer is prone to slipping on the switching gasket can be effectively solved, air can be evenly sucked into the wafer, and wafer damage caused by unbalanced air suction is prevented.

The invention discloses a building carbon fiber reinforcing band and a reinforcing band winding device. The reinforcing band structure comprises a reinforcing band body, the reinforcing band body is provided with an upper band film and a lower band film which are attached to each other, the top of the upper band film is provided with concave parts distributed at equal intervals, and the top of thelower band film is provided with convex parts distributed at equal intervals; the concave parts and the convex parts are arranged to be of a conical structure, the concave parts and the convex partsare distributed at intervals, and concave holes are formed in the positions, corresponding to the concave parts, of the top of the upper band film and the positions, corresponding to the convex parts,of the bottom of the lower band film; and the reinforcing band winding device comprises a positioning frame, a winding roller is rotationally connected between the inner walls of the two sides of thepositioning frame, and one end of the winding roller is in transmission connection with a driving motor. The tightness of contact between portions of the band body is improved through adsorption force generated by the concave holes, and therefore the situation that the actual use effect is affected due to the fact that the reinforcing band body are in a tightened state due to excessive stretchingand winding is avoided.

The invention relates to a forming mould of a thermal-insulation layer of a thermal-insulation pipeline. The forming mould comprises a mould body, wherein the mould body comprises an upper mould and a lower mould, the upper mould and the lower mould form a bi-parting mould, and are respectively provided with a mould housing and a mould liner which corresponds to the mould housing and internally provided with a semicircular cavity; by forming a plurality of through holes in the inner wall of the mould liners, a cavity communicated with the through holes is arranged on the outer wall of each mould liner, at least one extraction opening communicated with the through holes by virtue of the corresponding cavity is formed in each mould housing, and the extraction openings are connected with a mould external vacuumizing assembly. By arranging the through holes, the cavities and the extraction openings, the vacuumizing assembly is started to ensure that negative pressure is formed in each cavity, and thus a film can be firmly adsorbed on the inner walls of the mould liners, the inner walls of the mould liners can be well separated from a thermal-insulation layer without damaging the thermal-insulation layer, and the surface thickness of the thermal-insulation is relatively uniform.