9results about How to "Reduce back pressure" patented technology

This utility model discloses a dust collection device for cutting building decoration materials, including a debris collection device and a high-pressure blower. The debris collection device includes a collection bucket and a second air inlet pipe. A debris baffle is provided inside the collection bucket. An air inlet hole is formed through one side of the top of the debris baffle. Air outlet holes are uniformly formed around the air inlet hole at the top of the debris baffle. Limiting notches are uniformly formed on the outer side of the debris baffle. A base plate is fixedly connected to the bottom end of the second air inlet pipe, and an exhaust pipe is uniformly fixedly connected to the top of the base plate. A top connecting plate is fixedly installed at the top of the second air inlet pipe. This utility model effectively solves the problem of difficult high-temperature handling of metal cutting debris through an innovative design of water-cooled dust suppression and multi-stage interception. It utilizes the fine bubbles generated by the exhaust pipe to extend the gas-liquid contact time, combined with the debris baffle forcing the debris to collide and sink multiple times, rapidly cooling the high-temperature debris.

The utility model relates to the technical field of nozzles for injection molding, in particular to an injection mold runner nozzle, which comprises a shell, a nozzle body and a nozzle cover, the spraying assembly is detachably arranged at the bottom end of the hollow flow channel; the valve pin is arranged at the hollow flow channel in a sliding manner; wherein a first accommodating groove and a second accommodating groove are formed in the bottom end of the hollow flow channel; the spraying assembly comprises a valve nozzle assembly arranged at the first containing groove, a third containing groove is formed in the top end of the valve nozzle assembly, and a penetrating spraying channel is formed in the lower side of the valve nozzle assembly. The fixing piece is detachably arranged in the second containing groove, is arranged in a hollow penetrating mode and is arranged on the outer side of the valve nozzle assembly in a sleeving mode; the supporting ring is clamped to the third containing groove, a first through hole is formed in the middle of the supporting ring, two or more second through holes are evenly formed in the peripheral side of the first through hole, and the second through holes communicate with the hollow flow channel and the avoiding part correspondingly. The utility model discloses a runner nozzle of an injection mold, and aims to solve the problem that a valve pin of an injection nozzle in the prior art is easy to deviate in the radial direction.

This invention discloses a waste heat recovery device for flue gas from a thermal oil aluminum melting furnace, relating to the field of baking furnace technology. The device includes a furnace, with a support rod fixedly connected to the outer wall of the furnace and an exhaust pipe fixedly connected to the top of the furnace. A furnace opening and closing door is provided on the front of the exhaust pipe, and a waste heat recovery mechanism is installed inside the exhaust pipe. By setting up the waste heat recovery mechanism, while heat is exchanged through inclined heat-conducting plates, the rotation of the inclined heat-conducting plates dynamically disturbs and redistributes the uneven heat distribution of the high-temperature flue gas within the exhaust pipe, continuously reconstructing the flue gas flow field. Through the continuous rotation of each inclined heat-conducting plate within the exhaust pipe, it is ensured that each inclined heat-conducting plate uniformly contacts and exchanges heat with the flue gas at all locations within the exhaust pipe, significantly improving the overall heat transfer efficiency and waste heat recovery rate.

The utility model discloses a valve cover and contain its electromagnetic pulse valve, the valve cover includes valve cover body, the upper surface of valve cover body has the exhaust pipe outside, the exhaust pipe is used for discharging the air of valve cover chamber of electromagnetic pulse valve, the bottom of exhaust pipe with valve cover chamber is linked together, and the top of exhaust pipe constructs and has the exhaust outlet, to export the compressed air in valve cover chamber. Through separating exhaust pipe and valve cover body, the exhaust pipe is external on valve cover body, thus, the section area of exhaust passage increases, and the angle of exhaust passage is reduced, and the exhaust resistance is reduced, can effectively promote the output pressure rising rate of electromagnetic pulse valve.

The ultrasonic probe comprises a sound head, a connecting cable and a plug, the sound head comprises a sound head shell, a transducer and a heat exchange piece, the connecting cable comprises a connecting cable shell, a first liquid path pipe and a second liquid path pipe, and the plug comprises a plug shell and an active liquid cooling device. The active liquid cooling device comprises a radiator, a pump, a liquid storage tank, a third liquid path pipe and a fourth liquid path pipe. The outlet of the pump is connected with the liquid storage tank, the cavity in the pump is communicated with the cavity of the liquid storage tank through the fourth liquid path pipe, the liquid storage tank is provided with a relatively larger cavity, and the larger cavity has a wider horizontal cross section, so that the hydraulic pressure of liquid can be effectively reduced, and the hydraulic pressure of the cavity in the pump communicated with the liquid storage tank is also reduced; the back pressure of the pump can be reduced through the liquid storage tank, the working pressure of the driving film in the pump can be reduced through reduction of the back pressure in the pump, the service life of the driving film is prolonged, and then the service life of the pump is prolonged.

An AC coordinated control system includes a first coordinated controller and at least two welding power sources, the first coordinated controller including a parameter setting unit configured to set parameters required for welding, a communication unit in communication with each of the at least two welding power sources and configured to transmit the parameters to each of the at least two welding power sources, an output unit connected to the at least two welding power sources and configured to output a phase of the first coordinated controller to the at least two welding power sources, and a control unit connected to the parameter setting unit, the communication unit, and the output unit and configured to control actions of the parameter setting unit, the communication unit, and the output unit, wherein the at least two welding power sources are configured to output welding currents synchronized with the phase of the first coordinated controller in response to receiving the parameters transmitted by the output unit and the phase of the first coordinated controller. An operation method of an AC coordinated controller is also provided.

This invention relates to the field of gas field production technology, and in particular to a gas well pumping and drainage method for producing gas by draining liquid from the entire wellbore. The steps are as follows: Step 1: Deploy a single-flow device; Step 2: Begin the pumping operation; Step 3: The pumping device descends; Step 4: Reciprocating operation; Step 5: Detect the liquid accumulation and resume production. This invention provides a gas well pumping and drainage method for producing gas by draining liquid from the entire wellbore, and provides a downhole device with a reasonable structure, stable performance, and strong gas-liquid lifting capacity, which has a gas-liquid unidirectional flow control function to assist in gas-liquid lifting and prevent liquid backflow. This method solves the problems encountered in the pumping and drainage process of gas wells by adopting a new method of relay drainage using a pumping device and a single-flow device. It can significantly reduce the height of the liquid column in the wellbore, realize the lifting of liquid from the entire wellbore of the liquid-filled gas well, further improve the production recovery effect of the liquid-filled well, and effectively solve the problem of production recovery of liquid-filled gas wells.

This invention discloses a molten salt energy storage system and its operation method for thermal power plants coupled with compressed carbon dioxide energy storage, belonging to the field of energy storage and peak shaving in thermal power plants. The system includes a molten salt energy storage unit and a compressed carbon dioxide energy storage unit: molten salt is heated by extracted steam after reheating for heat storage; the heat of compression generated by the compressed carbon dioxide is used to heat feedwater and condensate, eliminating the need for an independent heat storage medium; before expansion, carbon dioxide is heated by four stages of extracted steam and high-temperature molten salt, and cold energy recovery is used to liquefy the carbon dioxide in a circulating manner; the operation method includes peak shaving and load reduction operation modes and peak shaving and load increase operation modes. This invention can improve the peak shaving response speed and regulation capability of thermal power plants, increase electricity-to-electricity efficiency by more than 20%, eliminate the need for cooling water and an independent heat storage medium, reduce investment, achieve energy cascade utilization and decoupled operation of compression and expansion, enable boilers to maintain high loads to achieve zero grid connection electricity, avoid frequent start-ups and shutdowns, and extend equipment life.

The invention relates to the technical field of thermal power generation, in particular to a thermal power generating unit quality and efficiency improving system and method.The thermal power generating unit quality and efficiency improving system integrates a heat supply network initial station, an electric boiler subsystem, a hot water heat storage subsystem and a circulating water cooling subsystem, and the heat storage subsystem has two connection states through valve control; the electric boiler is cooperated to realize deep peak regulation and peak operation; and a cooling system is connected in a non-heat-supply season, the heat storage tank is reused as a low-temperature circulating water energy storage device, the back pressure and coal consumption of the unit are reduced, unification of full-period peak regulation flexibility and operation economy is achieved, and the equipment utilization rate and the system energy efficiency are remarkably improved.