Abstract: A feed detection apparatus of a 3D printer, comprising a gear, a measurement device, a support, and a compression assembly. The gear is provided on the support to abut against a filament material, and rotates along with a movement of the filament material. The measurement device is placed on the support to measure a rotating speed of the gear, and determines a feeding status of the filament material according to a measurement result. The compression assembly comprises a connection member and an abutment member; the connection member is provided between the support and the abutment member; the abutment member is used for regulating a pressure of the connecting member applied on the support so as to enable the gear to abut against the filament material.

Abstract: A cyclonic separating device includes first and second cyclonic separating units. The first cyclonic separating unit is fitted over the second cyclonic separating unit. The second cyclonic separating unit includes first cyclones and second cyclones respectively arranged in a ring shape. Dust falling ends of the first cyclones define an accommodation space therebetween. The second cyclones partially extend into the accommodation space. Each first cyclone comprises first, second and third cone sections, each of which has a cone structure; airflow sucked in the first cyclones is sequentially separated by the first, second and third cone sections, and dust in the airflow is discharged from the third cone section; a central axis of the first cone section is parallel to a longitudinal axis of the dust cup; and an angle between a central axis of the second cone section and a central axis of the third cone section is 5°-20°.

Abstract: A cyclonic separating device includes first and second cyclonic separating units. The first cyclonic separating unit is fitted over the second cyclonic separating unit. The second cyclonic separating unit includes first cyclones and second cyclones respectively arranged in a ring shape. Dust falling ends of the first cyclones define an accommodation space therebetween. The second cyclones partially extend into the accommodation space. Each first cyclone comprises first, second and third cone sections, each of which has a cone structure; airflow sucked in the first cyclones is sequentially separated by the first, second and third cone sections, and dust in the airflow is discharged from the third cone section; a central axis of the first cone section is parallel to a longitudinal axis of the dust cup; and an angle between a central axis of the second cone section and a central axis of the third cone section is 5°-20°.

Abstract: Disclosed are a testing method, a system and a device for flicker fusion frequency range. The testing method comprises: taking end point values of a self-preset range as starting judgment values; acquiring a flicker judgment result of a subject; if the flicker judgment result is flickering, continuing to execute the acquisition step by increasing a judgement value until the flicker judgment result turns into non-flickering, and defining a judgement value at the moment of turning as an judgment valueup; if the flicker judgment result is non-flickering, continuing to execute the acquisition step by decreasing a judgement value until the flicker judgment result turns into flickering, and defining a judgement value at the moment of turning as an judgment valuedown; and acquiring a flicker fusion frequency range which takes a judgment valueup and a judgment valuedown as end point values.

Abstract: This invention provides a phosphide catalyst for syngas conversion and the production method and use thereof, more specifically, to a catalyst for converting a syngas raw material into oxygenates, comprising one or more metallic Fe, Co, Ni and their phosphides, the production method of the catalyst and its use in the reaction of converting a syngas raw material into hydrocarbons and oxygenates. According to the invention, a catalyst for converting H2/CO into hydrocarbons and oxygenates, supported by SiO2 or Al2O3 and comprising one or more metallic Fe, Co, Ni and their phosphides under certain reaction temperatures and pressures is provided. The catalysts are consisted of two parts of an active component and a support. The active component is a mixture consisted of one or more of metallic Fe, Co, Ni and their phosphides. The support is selected from SiO2 or Al2O3.

Abstract: Disclosed is a locking arrangement having a first wall defining a first surface and a second wall defining a second surface, with the first and second surfaces abutting each other; a mechanism for locking the first wall against the second wall; and a movable member. The first wall and the second wall are configured to define an enclosed channel for accommodating the movable member such that the movable member is slidable within the channel, and wherein the locking arrangement may assume one of two configurations, in that in one of the two configurations said walls are prevented from moving relative to each other by the movable member and in the other configuration said walls and hence the arms extended therefrom are movable relative to each other.

Abstract: This invention provides a phosphide catalyst for syngas conversion and the production method and use thereof, more specifically, to a catalyst for converting a syngas raw material into oxygenates, comprising one or more metallic Fe, Co, Ni and their phosphides, the production method of the catalyst and its use in the reaction of converting a syngas raw material into hydrocarbons and oxygenates. According to the invention, a catalyst for converting H2/CO into hydrocarbons and oxygenates, supported by SiO2 or Al2O3 and comprising one or more metallic Fe, Co, Ni and their phosphides under certain reaction temperatures and pressures is provided. The catalysts are consisted of two parts of an active component and a support. The active component is a mixture consisted of one or more of metallic Fe, Co, Ni and their phosphides. The support is selected from SiO2 or Al2O3.

Abstract: The present invention is concerned with a locking arrangement having a first member and a second member, each having a front end and a rear end and with the first member and the second member connected together at a first pivot axis, a front portion, a rear portion and a locking mechanism. The locking mechanism includes a lever and a guide. The arrangement is configured to assume one of two configurations in that in a first configuration the lever is engaged in a first position due to orientation of the arrangement such that the first arm and the second arm are locked against each other, or in a second configuration in which the lever having been disengaged from the first position, or engaging or engaged in the second position, due to orientation of the apparatus such that the first arm and the second arm are movable relative to each other.

Abstract: The present invention is concerned with a locking arrangement having a first wall defining a first surface and a second wall defining a second surface, with the first and second surfaces abutting each other; a mechanism for locking the first wall against the second wall; and a movable member. The first wall and the second wall are configured to define an enclosed channel for accommodating the movable member such that the movable member is slidable within the channel, and wherein the locking arrangement may assume one of two configurations, in that in one of the two configurations said walls are prevented from moving relative to each other by said movable member and in the other configuration said walls and hence said arms extended therefrom are movable relative to each other.

Abstract: The present invention is concerned with a locking arrangement having a first wall defining a surface and a second wall defining a surface with the surfaces abutting each other. The first wall is provided with a first bulge defining a first elongate groove facing a first direction and the second wall is provided with a second bulge defining a second elongate groove facing a second direction opposite to the first direction, and the grooves are positioned to define a channel in which a ball bearing is movable there across. The first groove has a substantially same width there across and the second groove has a narrower end and a wider end, the locking arrangement is adapted to, depending on the orientation of the channel, assume a first configuration in which the ball bearing is positioned at one end of the channel or a second configuration in which the ball bearing is positioned at the opposite end of the channel.

Abstract: The invention provides an activated carbon supported cobalt based catalyst for directly converting of synthesis gas to mixed linear alpha-alcohols and paraffins, comprising cobalt, an activated carbon carrier, a metal promoter which is at least one selected from the group consisting of a zirconium component, a lanthanum component, a cerium component, a chromium component, a vanadium component, a titanium component, a manganese component, a rhenium component, a potassium component, a ruthenium component, a magnesium component and a mixture thereof, wherein the cobalt and the promoter are deposited on the activated carbon carrier or substantially uniformly dispersed therein, and the metal promoter is present in the form of a metal, an oxide or a combination thereof.

Abstract: The invention provide a process for producing directly mixed linear alpha-alcohols having 1 to 18 carbon atoms from synthesis gas comprising hydrogen and carbon monoxide, comprising the step of reacting hydrogen and carbon monoxide over a catalyst to produce mixed linear alpha-alcohols having 1 to 18 carbon atoms and hydrocarbons having 1 to 25 carbon atoms through Fischer-Tropsch process in one step in a reactor, wherein: the mole ratio of hydrogen to carbon monoxide is within the range of 1 to 3; the catalyst is an activated carbon supported cobalt based catalyst; the reactor is a fixed bed reactor, a slurry reactor or a fluid reactor; the reaction is carried out under specific conditions.

Abstract: The invention provide a process for producing directly mixed linear alpha-alcohols having 1 to 18 carbon atoms from synthesis gas comprising hydrogen and carbon monoxide, comprising the step of reacting hydrogen and carbon monoxide over a catalyst to produce mixed linear alpha-alcohols having 1 to 18 carbon atoms and hydrocarbons having 1 to 25 carbon atoms through Fischer-Tropsch process in one step in a reactor, wherein: the mole ratio of hydrogen to carbon monoxide is within the range of 1 to 3; the catalyst is an activated carbon supported cobalt based catalyst; the reactor is a fixed bed reactor, a slurry reactor or a fluid reactor; the reaction is carried out under specific conditions.

Abstract: The invention provides an activated carbon supported cobalt based catalyst for directly converting of synthesis gas to mixed linear alpha-alcohols and paraffins, comprising cobalt, an activated carbon carrier, a metal promoter which is at least one selected from the group consisting of a zirconium component, a lanthanum component, a cerium component, a chromium component, a vanadium component, a titanium component, a manganese component, a rhenium component, a potassium component, a ruthenium component, a magnesium component and a mixture thereof, wherein the cobalt and the promoter are deposited on the activated carbon carrier or substantially uniformly dispersed therein, and the metal promoter is present in the form of a metal, an oxide or a combination thereof.