290results about How to "Avoid plugging" patented technology

The pressure regulator is mainly composed of a body, a throttle valve, a limit platform, a conical platform, a positioning seat, a spring, and screws. The body is made of plastic, and the outer surface is provided with sealing folds, which can adapt to the pipes produced by different manufacturers. , The tolerance of the inner diameter of the joint plays a very good sealing role; there is a protrusion on the throttle valve, when the pressure is too large, the cone is embedded in the outlet end, and the liquid or gas flows out from the gap between the outlet end and the protrusion. It can play the role of voltage regulation and flow control.

The invention belongs to the technical field of 3D (three-dimensional) printers, and relates to a small desktop 3D printer which can reduce resonance. The 3D printer comprises a case, a machine frame, a printing unit, a drive device and a consumable mounting box, wherein the drive device comprises an X-axis drive motor, a Y-axis drive motor and a Z-axis drive motor; the drive device is fixed to the machine frame; the printing unit comprises a consumable extrusion device, a motor bracket, a printing platform and a platform bracket; the consumable extrusion device is fixedly mounted on the motor bracket; the printing platform is fixed to the platform bracket; the consumable mounting box is fixedly mounted on the case. The 3D printer has the beneficial effects that the overall structure is simple and attractive; consumables are convenient to replace; a phenomenon of wire blocking in a wire feed throat pipe is effectively avoided; the vibration generated when the 3D printer works is reduced; the printing quality of a product is improved; the internal space utilization rate of the 3D printer is improved; the printing range is large; the 3D printer is simple in structure and convenient to assemble.

The invention discloses a method for preventing bottom holes of a circuit board from being blocked in copper plating. After holes are formed in the circuit board in a drilling mode, electroless copper plating and full-plate flash plating are carried out, so the thickness of copper in each hole reaches 5-7um, then a segmentation drilling mode is adopted, drilling is carried out according to the back drilling depth ratio of 1:2:3:4, and a drill bit is taken out after drilling is carried out each time, so formed copper wires and glue residues are taken out from the holes. Due to the segmentation drilling mode, scraps in back drilling holes can be effectively removed, and the problem of hole blocking caused by the fact that the copper wires and the glue residues are difficult to remove is avoided, and quality of products is improved.

The invention discloses a drain-type pipe piece for tunnel lining. The drain-type pipe piece comprises a reinforced concrete pipe piece (1), a slurry injection hole (or a hoist hole) (1a) in the pipe piece (1), a load bearing steel bar (1b), and a concrete protective layer (1c) on the outer side; a water stop rubber block (2) capable of being expanded when being in contact with water is preburied in the concrete protective layer (1c) right opposite to one or two slurry injection holes (1a) of the pipe piece (1); a self-advancing type hollow anchor rod (3) is inserted in the slurry injection holes (or the hoist hole) (1a) of the pipe piece (1), then penetrates the water stop rubber block (2), and shoots out of the concrete protective layer (1c); and drain holes (3a) are formed in the rod wall of the outer end of the self-advancing type hollow anchor rod (3), and a filter column (4) used for filtering sand is plugged in the inner cavity of the self-advancing type hollow anchor rod (3). Lining built with the pipe pieces has a reliable drain function, and can reduce water pressure around the structure to ensure tunnel safety; and construction is convenient, small damage is caused to the pipe piece lining structure, and construction cost of the pipe piece lining is low.

The invention discloses a treatment method of waste water discharged by a silicon carbide micro powder production device, which belongs to multi-stage treatment of the waste water. The method is characterized by comprising the following steps of: (1) collecting waste water discharged at an acid washing section and waste water discharged at an alkali washing section respectively for pH adjustment during waste water treatment; and (2) neutralizing, flocculating, performing filter pressing, separating and precipitating with a composite flocculating agent prepared from an inorganic flocculating agent A and an organic flocculating agent B, and recycling or discharged qualified waste water. Suspended matters in treated waste water reach a discharge standard. Silicon carbide micro powder is recycled from the waste water discharged by the silicon carbide micro powder production device and is sold as a byproduct, so that wastes are made profitable, the environment is protected, the economic benefits of enterprises are enhanced, and production cost is lowered.

The invention discloses bamboo charcoal profiled fiber with good product quality and low production cost, and a preparation method thereof. The fiber comprises the following components in percentage by weight: 94-99 percent of melt-spun slices, 1-6 percent of bamboo charcoal fine particles, 0.05-0.5 percent of surfactant and 0.1-1 percent of antioxidant, wherein the melt-spun slices are polyester, polyamide, polypropylene, polyethylene and modified polymers of polyester, polyamide, polypropylene and polyethylene; and the bamboo charcoal fine particles are black bamboo charcoal or white bamboo charcoal with the particle sizes of less than 2 mum. The preparation method comprises the following steps of: (1) preparing the bamboo charcoal fine particles according to a certain proportion, adding the surfactant and the antioxidant into a double-screw machine in a mixed conveying way, and directly putting the dried melt-spun slices into the hybrid double-screw machine; (2) melting and extruding the melt-spun slices in the double-screw machine, uniformly mixing the melt-spun slices with the bamboo charcoal fine particles and an aid, and conveying the mixture into a spinning box for direct spinning, by means of connection of a flange bent pipe; (3) spinning a blend melt with a spinning component from a spinneret plate, cooling, blowing and winding to obtain bamboo charcoal profiled nascent fibers; and (4) performing stretching twice and heat setting according to a continuous yarn or short yarn post-processing procedure. The invention is suitable for the bamboo charcoal profiled fiber and preparation thereof.

The constant pressure current stabilizer is mainly composed of a base, a throttle valve, a conical platform, a positioning seat, and a spring. The outlet end of the base is provided with a platform, and a hole is provided in the center of the platform; the spring It adopts a tower structure, the large-diameter end is placed on the platform in the base, the small-diameter end is sleeved on the outer edge of the cone and pressed on the flange; the center hole of the positioning seat is sleeved on the valve stem, and the positioning seat The outer wall is provided with a thread that matches the inner wall of the base, and the positioning seat is screwed on the inner wall of the base, and the prestressed pressure of the spring can be adjusted by adjusting the position of the positioning seat on the inner wall of the base, so as to achieve the purpose of stabilizing the voltage and controlling the flow .

Disclosed are an electrode wire (2) for electro-discharge machining and a method for manufacturing the same, which reduce micro-particles generated when an electrode wire is subject to the electro-discharge machining and improving the machining speed and the surface roughness of a workpiece. The method includes preparing a wire rod, which includes a first metal (21) and has a first diameter, as a core wire, plating a second metal (23) on the core wire, performing a fine wire process for the core wire plated with the second metal so that the core wire has a second diameter, while forming a corrugation (23a, 24a) having a predetermined pattern on a surface of the core wire having a second diameter, and performing a heat treatment process to form a first alloy layer at a boundary surface between the core wire and the second metal through a mutual diffusion between the core wire and the second metal, and to form a second alloy layer at an outer portion of the first alloy layer through diffusion of the first metal toward the second metal.

The sealed needle-less transfusion joint includes one casing, one liquid outlet joint with central hole adhered to the casing, one four claw elastic tab outside the needle tube, and one rubber tube outside the elastic tab matched with the liquid outlet joint and the needle tube wall. When the sealed needle-less transfusion joint is in use, the injector nipple compresses the rubber tube and the elastic tab to make the rubber tube form one saccule so that medicine liquid can enter to the saccule and further enter through the side hole to the needle tube, the liquid outlet joint and the retained vein needle. After finishing transfusion, the injector nipple is withdrawn, and the liquid is jetted fast through the liquid outlet joint owing to the resilience of the rubber tube, so as to rinse the vein needle and to avoid blood solidification.

The invention relates to an auxiliary apparatus for the manual guidance of moving threads in a thread-production and/or thread-handling process. The auxiliary apparatus has a hand injector (2), which is connected to a compressed-air line (5) and to a waste line (3), which is coupled to a waste-collecting location (4), wherein the hand injector, at a free end, has a suction opening for accommodating the threads. In order for an operator to realize quick operating sequences in the case of complex threading and feeding operations, according to the invention the hand injector has at least one manually operable control button (9) which interacts, via a signal connection (11, 31, 32), with a control unit (10, 16, 34) of a machine (13) and/or a machine component (14). For this purpose, use is advantageously made of a hand injector with a grip component (24), which is assigned at least one manually operable control button for triggering electrical button signals.

The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus for preventing the plugging, blockage and/or contamination of an SCR catalyst. In another embodiment, the method and apparatus of the present invention is designed to protect an SCR catalyst from plugging and/or blockage from large particle ash that may be generated during combustion.

The invention provides a test device which comprises a first connecting element, a second connecting element, a first switch element and a second switch element, wherein the first connecting element is used for connecting with a charging device; the second connecting element is used for connecting with a mobile terminal; the first switch element is respectively connected with the first connecting element and the second connecting element and is used for charging the mobile terminal by the charging device when the first switch element is switched on, so that the test device can acquire a charging function data of the mobile terminal; the second switch element and the second connecting element are connected and grounded and are used for grounding an OTG control port of the mobile terminal when the second switch element and the second connecting element are switched on, so that the test device can acquire the OTG function data of the mobile terminal. Thus, the test for the charging function and the OTG function can be completed by only connecting the mobile terminal with the test device, so that the repeated processes of plugging and pulling the connecting wire can be avoided, the test efficiency is increased and the risk of scratching the mobile phone shell can be reduced.

The invention discloses a denitrating coal economizer coal economizer high-temperature bypass device which comprises a coal economizer and a coal economizer bypass flue, wherein the inlet end of the coal economizer bypass flue is connected with one side of the coal economizer; an electrically operated baffle door is arranged at the inlet end of the coal economizer bypass flue; a coal economizer inlet is formed in the top of the coal economizer; a coal economizer outlet is formed in one side of the bottom of the coal economizer; a coal economizer ash hopper is arranged at the bottom of the coal economizer; the coal economizer outlet and the outlet end of the coal economizer bypass flue are connected with a vertical flue; an ammonia spraying grating is arranged on the vertical flue; a first horizontal flue is connected with the top of a denitrating reactor; a denitrating reactor inlet ash hopper is arranged at the bottom of a second horizontal flue; the bottom of the denitrating reactor is connected with a denitrating reactor outlet flue; and the denitrating reactor outlet flue is connected with an air preheater. The denitrating coal economizer coal economizer high-temperature bypass device provided by the invention has the beneficial effects that the necessary denitrating efficiency can be guaranteed, and the generation of sulfate and ammonium hydrogen sulfate can be inhibited; and large-grain ash slag in smoke can be removed, so as to avoid obvious hole blockage and erosion to a catalyst.

The invention relates to an automatic assembly line device and a control method. The automatic assembly line device comprises an assembly main line with multiple stations, first test tables, second test tables, first conveying devices and second conveying devices. Each first test table and the corresponding second test table are located on the two sides of the corresponding station respectively. Each first test table, the corresponding second test table and the corresponding station are located on the same straight line. The first conveying devices are arranged on the side faces of the first test tables and used for conveying products between the stations and the first test tables. The second conveying devices are arranged on the side faces of the second test tables and used for conveying the products between the stations and the second test tables. Each station is correspondingly provided with the two corresponding test tables. When the first test tables are busy, the products can be conveyed to the second test tables to be tested, and the products can be effectively prevented from blocking the line.

The invention discloses a networked train broadcasting system and an implementation method, and belongs to the technical field of urban rail transit vehicles and motor train units. A full Ethernet topology is adopted and is matched with a digital multimedia terminal. The POE power supply IEEE 802.3 af/at technology is adopted for the low-power-consumption terminal device. The switch adopts a dynamic host configuration protocol DHCP to automatically allocate the IP address of the terminal device. A VoIP technology is adopted to realize visual digital intercom. Based on a gigabit Ethernet communication technology, an embedded processor is used as a core, a full Ethernet topology, a digital multimedia terminal and an integrated control host are adopted, three subsystems are integrated with the Ethernet, and terminal device uses a POE power supply and DHCP technology.