33results about How to "Block return" patented technology

The invention relates to a monodispersed spherical titanium dioxide core-shell structure composite material and a preparation method thereof. The monodispersed spherical titanium dioxide core-shell structure composite material comprises an inner core formed by monodispersed carbon spheres and a titanium dioxide shell layer covering the inner core, wherein noble metal is doped in the titanium dioxide shell layer.

A tubular binding apparatus for surgical operation features its additional mechanism for preventing the secondary triggering in order to improve its usability greatly. Said additional mechanism may be the improved structure of safety rod and pull plate and additionall use of convex block and stop block in its handle, or the coordinate mechanism between the pin driving rod and casing, safety bolt and fixing rod, or additional use of creased ring in the pin cabin.

A lamp unit of a projector system and a display device using the same, includes a lamp; a reflector for reflecting a light generated from the lamp; and a cover glass mounted at an opening of the reflector, and the cover glass having a blocking device for obstructing a light incident from an optical system, disposed in front of the light with respect to a light projecting direction, to the reflector. Accordingly, a light irradiated to the lamp, which increases the temperature of an electrode welding part of the lamp, can be blocked, thereby improving a lifespan of the lamp.

The invention relates to a yarn cylinder group type dust collection device capable of effectively preventing dust from returning. The yarn cylinder group type dust collection device is characterized by comprising a strip-shaped dust collection cover, a dust filter structure communicated with the dust collection cover through a dust collection pipe, and a suction fan arranged in the dust collection pipe; a yarn cylinder bracket and a plurality of yarn cylinder vertical shafts are arranged inside the dust collection cover; at least two parallel filter plates are arranged in the dust filter structure; the filter plate which is nearest to an inlet of the dust filter structure is a first filter plate; the first filter plate is parallel to at least one of the four lateral faces in a filter direction; an interval is reserved between the first filter plate and the wall face of the shell, which is parallel to the first filter plate; and at least one filter plate is parallel to all the four lateral faces in the filter direction, and is connected with the wall face of the shell in a sealed manner. The dust collection range of the yarn cylinder group type dust collection device provided by the invention covers an entire yarn cylinder group; and the filter plate or a baffle with the interval with the wall face of the shell is arranged in front of the last filter plate in the dust filter structure in the filter direction, so that the dust returning phenomenon can be effectively avoided.

The invention provides an ecological restoration method for a quarry in a mining area, and belongs to the field of ecological restoration. The ecological restoration method for the quarry in the mining area comprises the following steps: leveling the quarry, crushing waste ores to obtain ore powder, and soaking the obtained ore powder with an aqueous solution containing sulfuric acid to obtain pretreated ore powder; adding water and an agglomerating agent into the pretreated ore powder, and shearing to obtain a slurry; laying an activated carbon layer, the slurry and an isolation layer composed of coal gangue and fly ash in the leveled quarry in sequence, and compacting while spraying water; and then carrying out operations such as borrowed soil backfilling, crop planting and the like. Themethod is a systematic and targeted restoration method, multiple measures are simultaneously taken, effects of recycling, restoring, weakening the toxicity of the mining area, enriching the nutritionof the mining area, increasing the diversity of objects in the mining area and the like are integrated, the abandoned mining area is converted into a usable area after long-term restoration, the added borrowed soil is prevented from being eroded, and normal growth of planted crops is guaranteed.

The invention discloses a synchronizer assembly which comprises two synchronous rings (1), a sliding toothed sleeve (2), three locating pin systems (3) and three lockpins (4), wherein the sliding toothed sleeve (2) is in a shift fork plate type structure; and each locating pin systems comprises two semicircular locating pins (5) and two bow springs (6). The synchronizer assembly disclosed by the invention has the advantages of gear release prevention, high synchronization speed, light weight, material conservation, energy conservation, long service life, short gear shift synchronization time and the like.

The invention relates to a photovoltaic-photothermal all-in-one machine. The photovoltaic-photothermal all-in-one machine comprises a base frame, a heat collecting pipe connected with the base frame and a photovoltaic panel which is arranged on the radial outer side portion of the heat collecting pipe and can rotate around the heat collecting pipe. The photovoltaic panel comprises a glass inner panel, a glass outer panel and a photovoltaic cell string arranged between the glass inner panel and the glass outer panel. The photovoltaic panel is provided with a photovoltaic working surface deviating from the heat collecting pipe, the glass inner panel is arranged on the side, facing the heat collecting pipe, of the photovoltaic cell string, and the glass outer panel is arranged on the side, deviating from the heat collecting pipe, of the photovoltaic cell string. A reflective coating is attached to the inner panel face, facing the photovoltaic cell string, of the glass inner panel, and therefore, the glass inner panel and the reflective coating jointly form a reflector with the reflective face facing the heat collecting pipe. The photovoltaic-photothermal all-in-one machine can realizephotovoltaic-photothermal switching, and is compact in structure, attractive in appearance and low in manufacturing cost.

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 discloses a centrifugal oil-gas separator. The centrifugal oil-gas separator comprises a shell, a cavity partition plate, a rotating shaft and a driving disc, wherein the cavity partition plate and the shell are used for forming a separation cavity in a separated mode, a sleeve pipe is arranged on the cavity partition plate, the lower end of the rotating shaft penetrates through thesleeve and then is connected with the driving disc, and a step-shaped gap seal is arranged between the upper end of the driving disc and the lower end of the sleeve. The centrifugal oil-gas separatorhas the beneficial effects that the step-shaped gap seal is directly adopted, compared with an original maze seal and an original fan and horizontal clearance seal combination, parts are reduced, theproduction is facilitated, the installation is simple and convenient, and the manufacturing cost is saved; and due to the facts that the path of the whole gap seal is long and the structure of the gapseal is a step-shaped structure, oil needs to pass through two upward climbing processes when the oil in a driving chamber enters the gap again, and the horizontal step surface can also play a role in reducing pressure and buffering the incoming oil, so that the oil in the driving chamber is also not prone to entering the separation cavity.

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.