49results about How to "Prevent Suckback" patented technology

The invention provides a natural gas hydrate synthesis and mining simulation experiment system and method. Combustible ice is synthesized by CH4 gas in a gas storage tank and clear water in a first liquid storage tank, a temperature control box, a backup pressure valve and a piston container form a combustible ice mining experiment system, and influences of the temperature, the pressure and the inhibitor quantity on combustible ice mining are analyzed by collecting the temperature, the pressure and the inhibitor quantity; meanwhile, further detailed analysis and research are conveniently carried out according to the temperature on a sand-filled tube, the internal temperature tested by a pressure probe and the change condition of the pressure; meanwhile, a one-way valve is used for preventing the back suction phenomenon caused by air interference in the experiment system, and the experiment accuracy is improved; and through the backup pressure valve, a fourth pressure gauge, a liquid injection pump and a fifth pressure gauge, precise control over the gas or liquid pressure is realized, pulses are prevented, and the accuracy of measurement and experimental results is improved. The natural gas hydrate synthesis and mining simulation experiment system is simple in structure and convenient to operate, and the experimental process is better controlled.

The invention belongs to the field of analytical chemistry and relates to an extraction head detachable type solid phase micro extraction probe and a preparation method thereof. The preparation method comprises the following steps of: shearing a polydimethyl siloxane tube and a metal wire; coating a layer of high-temperature epoxy resin glue on the metal wire and sleeving the polydimethyl siloxane tube on the metal wire for fixedly bonding to obtain a self-made extraction head, wherein a sleeve is arranged at one end of the self-made extraction head, and a free metal wire is arranged at the other end of the self-made extraction head; then properly extruding at the position of an inner tube of a solid phase micro extraction probe suit, which is away from the tail end by 0.2-0.5cm so as to generate a dent, or bending the free metal wire part of the self-made extraction head by more than one bent; and inserting the metal wire into the inner tube. The probe is simple and convenient in theuse and preparation processes; the probe can be continuously used by extracting the extraction head and inserting a new self-made extraction head after being used; and the repeated selective examination times can reach 80-120 times. The cost of each probe is one thousand of that of the traditional commercial probe and has strong operability and reliability.

The invention relates to an oil-water separating device and an oil sludge separating apparatus including the same. The oil-water separating device comprises a shell, an oil feeding unit arranged on the shell, a drainage hole, an oil outlet and a heat exchange unit arranged in the shell, wherein the heat exchange unit comprises multiple layers of heat exchange tubes, the oil feeding unit comprises an oil feeding pipeline communicated with the interior of the shell, the end , located in the shell, of the oil feeding pipeline is provided with a plurality of nozzles, and the nozzles are located among the heat exchange tubes or below the heat exchange tubes. The oil-water separating device provided by the invention has good condensation effect, can effectively reduce the temperature of high-temperature oil gas, greatly improves oil-water separation efficiency, enhances the utilization rate of waste oil, and achieves the purposes of energy conservation and environmental protection.

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.

An embodiment of the invention discloses homogenizing equipment for production of home decoration coatings, belonging the technical field of coating processing. The equipment comprises a grinding tankfor grinding and filtering coatings and a homogenizing tank for mixing the ground coatings, wherein filter pipes are fixed to the upper side and the lower side of an inner cavity of the grinding tank; grinding joints for extruding and grinding the inner walls of the filter pipes are arranged on the inner sides of the filter pipes; a shaft rod is fixed to the middle part of the bottom of each grinding joint; one side of the bottom of each shaft rod penetrates through the homogenizing tank; a motor is fixed to one side of the bottom of the homogenizing tank; the power output end of the motor isconnected with the shaft rods; a stirrer is fixed to the side surface of each shaft rod in the homogenizing tank; and one side of the top of each filter pipe communicates with a feeding pipe. Throughcooperation of the grinding tank and the homogenizing tank, coating particles can be conveniently homogenized after being fully ground, so the fluid uniformity of coating production is improved.

The invention discloses a cleaning and drying device for corrosion foil. The device comprises a box. An acid gas treatment device and a hot air device are fixedly connected to the top of the box, theacid gas treatment device communicates with an inner cavity of the box through an air outlet pipe, and a hot air pipe is horizontally arranged on the top of the inner cavity of the box. The two ends of the hot air pipe are closed, the bottom of the hot air pipe is provided with multiple air jets with screening holes, and the upper end of the hot air pipe communicates with the hot air device through a pipe. A cleaning device is arranged on the portion, below the hot air pipe, of the inner cavity of the box, a cleaning plate is arranged below the cleaning device, and a rotation shaft is arrangedbelow the cleaning plate. The cleaning plate is rotatably connected with the rotation shaft, and the bottom of the box is provided with a heater. After cleaning is completed, the heater is opened forheating and drying, the hot air device is started at the same time, hot air of the inner cavity of the box blows into the acid gas treatment device through the air outlet pipe, the acid gas treatmentdevice absorbs acid gas in the hot air, and the situation is avoided that since the environmental pollution is caused by the acid gas, the health of personnel is influenced.

The invention relates to the technical field of sanitation equipment and in particular relates to a shunting-type deodorization system and a fecal suction truck, wherein the shunting-type deodorization system comprises a deodorization mechanism, a self-controlled vent valve and a gas delivery mechanism; the self-controlled vent valve comprises a body, a first valve and a second valve; the body isprovided with an exhaust cavity, an air alternating cavity and an air inlet cavity which are communicated in sequence; the exhaust cavity is led to an exhaust port; the air alternating cavity is led to an air alternating hole; the air inlet cavity is led to an air inlet; the first valve is arranged on a communication hole located between the air alternating cavity and the exhaust cavity; the second valve is arranged on a communication hole located between the air alternating cavity and the air inlet cavity; the exhaust port of the self-controlled vent valve is communicated with the deodorization mechanism; and the gas delivery mechanism is communicated with the air alternating hole and an odor source. By using the shunting-type deodorization system disclosed by the invention, accurate shunting can be realized by virtue of the self-controlled vent valve according to the gas flow direction at the air alternating hole, and the phenomena of odor overflowing and reverse suction of a deodorant solution can be effectively avoided.

The invention provides a degradability testing device under a controlled composting condition. The device comprises an air supply mechanism, a degradable testing mechanism and a processor, an outlet of an air compressor of the air supply mechanism is communicated with a flow divider through a pipeline, and compressed air generated by the air compressor is input into the flow divider. The degradable testing mechanism is divided into a sample testing assembly, a reference sample testing assembly and a blank testing assembly, each group of testing assembly comprises a reaction kettle, a stirrer, a carbon dioxide sensor and a transmission module, the reaction kettle is communicated with the flow divider through a first air inlet pipe, and a heating device for heating the reaction kettle is arranged outside the reaction kettle; a stirring rod of the stirrer extends into the reaction kettle; the reaction kettle is communicated with a gas inlet of the carbon dioxide sensor through a first gas outlet pipe; the processor receives signals transmitted by the transmission modules of the multiple groups of testing assemblies. The device completely meets the GB/T 19277.1-2011 standard, and the final aerobic biological decomposition capability and disintegration degree of a test material are measured under the simulated strong aerobic composting condition.

The invention discloses a small-size and large-capacity dish preparation machine with a weighing function. The machine is characterized by comprising a dish preparation machine groove, a weighing assembly, a cleaning assembly, a display assembly and a control circuit module; and the weighing assembly, the cleaning assembly, a disinfection assembly and the display assembly are electrically connected with the control circuit module. The dish preparation machine has a weighing function, the additional value of the dish preparation machine is increased, meanwhile, a weighing assembly base is creatively designed, the size of the dish preparation machine is remarkably reduced, and meanwhile the capacity of the dish preparation machine is increased.

The invention belongs to the technical field of heat accumulating type heating furnaces, and provides a heat accumulating type energy-saving emission-reducing heating furnace and a heating method. Theheating furnace comprises a hearth, a gas inlet, an air inlet, an empty smoke outlet and a soot outlet. A left gas heat accumulating body array and a left air heat accumulating body array are arranged at one side of the hearth in a spaced mode, a right gas heat accumulating body array and a right air heat accumulating body array are arranged at the other side of the hearth in a spaced mode, and acombustion opening facing the hearth is communicated among the hearth, one side of the left gas heat accumulating body array, one side of the left air heat accumulating body array, one side of the right gas heat accumulating body array and one side of the right air heat accumulating body array. The problem that coal gas in a heat accumulating type heating furnace pipeline is exhausted into the atmosphere is solved, energy resources are wasted, and environment contamination to a certain degree is caused.

The invention relates to a spherical button type pressure compensation dripper with an anti-suck-back function, which comprises a shell and a spherical compensation component, a water inlet, a wide-diameter main flow channel, a variable-diameter main flow channel and a narrow-diameter main flow channel are sequentially arranged in the shell, and the spherical compensation component is positioned in a channel formed by the wide-diameter main flow channel and the variable-diameter main flow channel; a spiral auxiliary runner extending from the large-diameter end of the variable-diameter runner to the narrow-diameter main runner is arranged on the inner side wall of the variable-diameter runner, and an energy dissipation boss located below the spiral auxiliary runner is fixedly arranged in the narrow-diameter main runner; the water outlet end of the narrow-diameter main flow channel is covered with a patch connected with the shell, and water permeable holes are formed in the patch. The structure is simple, the shell, the compensation part and the elastic patch can be directly formed through mold injection molding or general blanking treatment, and the manufacturing process is simple; the spherical elastomer is used as a compensation component, and the durability of the spherical elastomer is far better than that of a common sheet-shaped compensation structure; the elastic patch can prevent the suck-back phenomenon generated at the water outlet during shutdown, and soil and other impurities are prevented from being sucked in.

The invention discloses an efficient degassing structure for a glass fiber reinforced plastics production workshop. The efficient degassing structure comprises a workshop roof and a ventilation unit,wherein the ventilation unit is located inside the workshop roof; five groups of longitudinal rods and four groups of horizontal rods are erected inside the ventilation unit; exhaust fans are fixedlyarranged at multiple groups of junctions between the longitudinal rods and the horizontal rods. The efficient degassing structure for the glass fiber reinforced plastics production workshop is provided with the ventilation unit, a petroleum hydrocarbon dissolving chamber, a perforated speed reducing plate and a rotating motor, and a large number of exhaust fans are started periodically to eliminate harmful gases in the workshop in a centralized way. Petroleum hydrocarbon adsorbents are used for effectively absorbing exhausted styrene gas, and the perforated speed reducing plate can prolong theresidence time of air bubbles in the dissolving chamber by blocking effect. Four groups of fan blades are driven to rotate by an output shaft to produce suction force for increasing the air filteringspeed at an activated carbon filtering structure, thereby improving the gas treatment amount. The efficient degassing structure can adapt to different working conditions, and has a better applicationprospect.