33results about How to "Block return" patented technology

The invention discloses a gas furnace. The gas furnace comprises a burner (1), a burner base (2) and a bracket, wherein the burner (1) and the burner base (2) are connected integrally; the lower part of the burner base (2) is further connected with a gas pipe (3); a plurality of air inlet holes (4) are formed in the middle of the burner base (2); the bracket is arranged on the burner base (2); a furnace tray is arranged on the burner (1); a plurality of fire holes are formed in the furnace tray; the furnace tray is a concavely spherical furnace tray (5); the fire holes are long-waist-shaped holes (6); a tile-shaped cover (7) is arranged on each long-waist-shaped hole (6); an opening (8) is formed in each of two ends of each tile-shaped cover (7); the openings (8) close to the center of the concavely spherical furnace tray (5) pass through closed covers (9); the inner surface of each closed cover (9) is a quarter of a concave spherical surface. The gas furnace has the advantages of uniform combustion and high combustion efficiency.

The invention discloses a damping buffer base of a machine tool. The damping buffer base comprises a sectional layer, a damping layer and a compression resistant layer which are arranged from top to bottom, wherein the sectional layer consists of a plurality of sheet boards which are spliced with one another; the damping layer comprises an upper framework tank; the sectional layer is positioned in the upper framework tank; raised sheets are arranged between the sectional layer and the inner bottom surface of the upper framework tank; each sheet board corresponds to one raised sheet; the compression resistant layer comprises a lower framework tank; the upper framework tank is positioned in the lower framework tank; and a spring is arranged between the upper framework tank and the lower framework tank. Compared with the prior art, the damping buffer base of the machine tool can fix and bear the whole machine tool to absorb and damp vibrations generated during working operation of the machine tool, so that precision during workpiece processing can be improved to avoid deviation caused by vibrations, and influences of frequent vibrations on precision parts in machine tool equipment can be reduced, and therefore, the service life of equipment is prolonged.

The present invention provides a microfluidic chip for enriching cells, the chip includes a lower layer chip 1, a middle layer chip 2 and an upper layer chip 3; the lower layer chip 1 includes an elution module 105, a buffer module 106, a specific binding module 107 and enrichment module 108; between the elution module 105 and the buffer module 106 is provided with a water-blocking gas permeable membrane 104; the elution module 105 is provided with a vertical buffer inlet 101; The channel is provided with a specific magnetic particle solution inlet 103 ; the middle-layer chip includes a filter module 201 and a cavity area 202 corresponding to the water-blocking gas-permeable membrane 104 . The present invention utilizes the multi-channel technology to achieve high throughput while being compatible with the flow restriction of subsequent chip modules, thereby reducing the sample loss of the connection of each module.

The invention discloses a ground embedded type two-way damping buffer base of a machine tool. The ground embedded type two-way damping buffer base comprises a sectional layer, a damping layer and a compression resistant layer which are arranged from top to bottom, wherein the sectional layer consists of a plurality of sheet boards which are spliced with one another; the damping layer comprises an upper framework tank; raised sheets are arranged between the sectional layer and the inner bottom surface of the upper framework tank; the compression resistant layer comprises a lower framework tank; the lower surface of the upper framework tank is provided with slope columns; slope surface pedestals are arranged on the inner bottom surface of the lower framework tank; and an outer fixed foundation is arranged on the lower framework tank. Compared with the prior art, the ground embedded type two-way damping buffer base of the machine tool can fix and bear the whole machine tool to absorb and damp vibrations generated during working operation of the machine tool, and vibrations from the ground also can be effectively absorbed by the compression resistant layer and are prevented from being transmitted to the machine tool, so that precision during workpiece processing can be improved to avoid deviation caused by vibrations, and influences of frequent vibrations on precision parts in machine tool equipment can be reduced, and therefore, the service life of equipment is prolonged.

The invention discloses a self-cleaning cooling structure of a Roots vacuum unit, and the self-cleaning cooling structure is used for solving the internal corrosion problem and the over-temperature parking problem of the Roots vacuum unit. The structure comprises an impurity removal part, a gas supply unit and a gas exhaust pipeline, wherein the impurity removal part is fixedly connected with a gas inlet cavity of a Roots vacuum pump for filtering impurities in working gas; clean air is introduced in a parking process for scouring parts in the pump, so that cleaning and cooling are realized; the gas supply part is fixedly connected with a gas suction cavity of the Roots vacuum pump; during working, clean cold air is introduced into the gas suction cavity for scouring a rotor of the vacuum pump, so that cleaning and cooling are realized; and the gas exhaust pipeline is fixedly connected with a gas exhaust cavity of the Roots vacuum pump for conveying the working gas into a downstream vacuum container, so that gas flow is prevented from returning to the pump cavity during parking. The self-cleaning cooling structure disclosed by the invention can be applied to the vacuum unit for removing complex component gas by sucking, so that damages, on the vacuum unit, of corrosive gas are reduced; and meanwhile, the temperature of the vacuum unit is reduced, and the service life of the vacuum unit is prolonged.

The invention provides a method for ecological restoration of a quarry in a mining area, which belongs to the field of ecological restoration. In the method, the quarry is leveled, and the discarded ore is crushed to obtain mineral powder, and the obtained mineral powder is used The aqueous solution is soaked to obtain pretreated mineral powder; water and agglomerating agent are added to the pretreated mineral powder and then sheared to obtain a slurry; the activated carbon layer, slurry and After the isolation layer composed of coal gangue and fly ash, compaction is carried out while spraying water; followed by operations such as backfilling with foreign soil and planting crops. This method is a systematic and targeted restoration method, using multiple measures at the same time. It integrates the effects of reuse, restoration, weakening the toxicity of the mining area, enriching the nutrition of the mining area, and increasing the diversity of the mining area. The abandoned mining area can be converted into a usable land, and the erosion of the added guest soil can be avoided to ensure the normal growth of the planted crops.