18results about How to "Avoid vaporization" patented technology

The invention discloses a supercooled liquid nitrogen cooling circulation system which comprises a container containing a refrigerant and a circulation pipeline partially located in the container, at least part of the circulation pipeline is located below the liquid level where the refrigerant is located in the container, and the circulation pipeline is connected with load equipment and provides cooling capacity for the load equipment. Purging and vacuumizing pipelines are connected to the circulating pipelines located at the upstream and downstream of the load equipment, and adjusting pieces capable of adjusting the cold mass flow in the circulating pipelines are arranged on the circulating pipelines. According to the invention, through the arrangement of the purging and vacuumizing pipelines, the circulating pipeline between the two purging and vacuumizing pipelines and the replaced load equipment can be purged and vacuumized through the two purging and vacuumizing pipelines when the load equipment is replaced; and refrigerant consumption caused by replacement of load equipment after temperature returning of the whole circulating pipeline is avoided.

The invention discloses a forced water circulation structure of a hot water boiler, relates to a water circulation structure of a boiler, and aims to solve the problems that an existing boiler is low in water speed, non-uniform in water flow distribution and thermal deviation, and particularly under the condition of poor water quality, scale is attached to the inner wall of a water pipe, so that heat transfer is affected, and even pipe explosion is caused. The coal economizer is communicated with the boiler barrel through a connecting pipe, the boiler barrel is communicated with the front lower collecting box, the boiler barrel is communicated with the rear lower collecting box, the front lower collecting box is communicated with the front upper collecting box, the rear lower collecting box is communicated with the rear upper collecting box, the front upper collecting box is communicated with one side lower collecting box, the rear upper collecting box is communicated with the other side lower collecting box, and each side lower collecting box is communicated with the side upper collecting box through a side water cooling wall. Each side upper header is communicated with a flue rear underwater header through a leading-out pipe, a convection heating surface is installed in a flue of the hot water boiler, the flue rear underwater header is communicated with a flue rear overwater header through the convection heating surface, and the flue rear overwater header is communicated with a water outlet header through a leading-out pipe. The invention is used in the field of boiler use.

The present invention discloses a low-pressure refrigerant liquid supply system and a control method thereof, which belongs to the technical field of steam compression cycle chilled water (heat pump) units, including a chilled water unit system and a bearing liquid supply system. The chilled water unit system includes a refrigerant pump, an evaporator, a condenser, a compressor, a power saver, a throttling mechanism, and a PLC control box. The bearing liquid supply system includes a first bearing lubrication liquid supply path from the condenser liquid collection bag to the compressor bearing and a second bearing lubrication liquid supply path from the condenser liquid collection bag to the compressor bearing. Through the design of the bearing liquid supply system, the influence of the vaporization of the refrigerant on the liquid supply of the refrigerant pump can be avoided as much as possible, the along-the-line / local resistance loss of the pipeline can be reduced, the cavitation margin before the refrigerant pump and the supercooling of the refrigerant can be guaranteed, the low-frequency operation of the refrigerant pump, the insulation of the bearing liquid supply pipeline and the exhaust of the pipeline after the refrigerant pump can effectively solve the adverse effects of pipeline vaporization on the liquid supply.

The application discloses an environmental protection gas load switch and belongs to the electrical equipment field, which is used to solve the problem of how to inhibit or eliminate the arc generated when the static contact and the moving contact of the load switch are disconnected. The environmental protection gas load switch comprises a shell, a moving contact, an operating mechanism, a first static contact and an arc extinguishing device. The moving contact is rotatably arranged in the interior of the shell, the operating mechanism is used for controlling the rotation of the moving contact, and the first static contact is fixedly arranged in the interior of the shell. The arc extinguishing device comprises a shell body, a rotating arm, a vacuum bubble and a reset spring, the shell body is fixedly arranged on the shell, the rotating arm is rotatably arranged on the shell body and is provided with an electrically conductive part, the electrically conductive part is arranged on the rotating path of the moving contact, the vacuum bubble is arranged on the shell body, and the two ends of the vacuum bubble are electrically connected with the electrically conductive part and the first static contact respectively, and the reset spring is arranged between the rotating arm and the shell body. When the moving contact is disconnected with the first static contact, the moving contact is electrically connected with the electrically conductive part.

The present invention relates to an etching device and an etching method thereof. The etching device comprises: an etching liquid supply unit, which supplies etching liquid to an etching chamber; a rinsing liquid supply unit, which supplies rinsing liquid to the etching chamber; a cleaning liquid supply unit, which supplies cleaning liquid to the etching chamber; and a first pressurization maintaining unit, which maintains at least one of the etching chamber and the etching liquid supply unit in a pressurized environment.

The present invention discloses a mixture transcritical cycle waste heat recovery system and method, the system includes a high-temperature turbine, a high-temperature regenerator, a medium-temperature regenerator, a gas-liquid separator, a liquid pump, a low-temperature regenerator, a precooler, a main compressor, a low-temperature flue gas heater, a medium-temperature flue gas heater, a low-temperature turbine, and a high-temperature flue gas heater connected in sequence. In the system, a mixture of H2O and C2O is used as a working fluid, the working fluid is in a supercritical mixed state at the high-temperature part, and part of the H2O will be separated from CO2 at the low-temperature part. CO2 is compressed and pressurized by a compressor, and H2O is pressurized by a water pump. The system uses a water pump to replace the recompressor in the traditional CO2 Brayton cycle. The power consumption of compressed liquid is much smaller than that of the recompressor, and the temperature of high-pressure water is also increased, solving the problem of mismatch between the heat absorption of the low-temperature working fluid and the heat release of the heat source. At the same time, it avoids the phenomenon of liquid carrying during gas compression and vaporization during liquid compression. The safety and stability of the equipment are improved.

The invention provides an ammonia fuel injection pump to fill up the blank of the existing ammonia fuel injection pump and solve the problem that ammonia fuel is volatile, low in viscosity, toxic and corrosive to damage parts and personnel at the same time. The ammonia fuel injection pump comprises an ammonia outlet valve assembly, a plunger and barrel assembly, an ammonia inlet valve assembly, an ammonia outlet connector and a bypass valve. The ammonia outlet valve assembly, the ammonia inlet valve assembly, the ammonia outlet connector and the bypass valve assembly are fixedly assembled on the plunger and barrel assembly; a plunger cavity is formed in the plunger and barrel assembly, and a high-pressure ring groove and a first low-pressure ring groove are formed in the bypass valve assembly. An ammonia inlet channel of the ammonia inlet valve assembly, an injection channel of the ammonia outlet valve assembly, the plunger cavity and the high-pressure ring groove are communicated with one another through a first channel formed in the plunger and barrel assembly; and the first low-pressure ring groove is communicated with the ammonia outlet channel of the ammonia outlet joint through a second channel arranged in the plunger and barrel assembly.

The invention provides a fluorine pump starting method, a control device, a double-circulation refrigerating system and a computer readable storage medium, which can shorten the time required for starting a fluorine pump and improve the starting success rate of the fluorine pump. The fluorine pump starting method comprises the steps of determining that a compressor auxiliary fluorine pump starting condition is met; starting a fluorine pump through assistance of a compressor; wherein the fluorine pump is started in an auxiliary mode through the compressor, the compressor is started firstly, then the fluorine pump is started, and the compressor is closed after the fluorine pump is started.

The present invention provides a norbornene preparation method, which comprises that ethylene and cyclopentadiene are subjected to a reaction in an ionic liquid to prepare the norbornene. The preparation method of norbornene provided by the invention has the characteristics of lower reaction pressure and higher safety.

The invention belongs to the technical field of aluminum alloy ingot production, and particularly discloses a rare earth zinc-aluminum alloy ingot intermediate frequency furnace smelting method which comprises the following steps: firstly, independently melting an aluminum ingot by using a furnace A at the melting temperature of 1000-1100 DEG C, then pouring molten aluminum into a furnace B, then adding lanthanum-cerium rare earth and metal silicon into the furnace B, heating the furnace B to 1100-1200 DEG C, keeping the temperature for 2-3 hours, and cooling to room temperature to obtain the rare earth zinc-aluminum alloy ingot intermediate frequency furnace. And after the lanthanum cerium rare earth and the metal silicon are completely melted, zinc ingots are added into the furnace B in batches, the melting temperature is 630-670 DEG C, after the zinc ingots in the furnace B are completely melted, furnace shutdown refining is carried out, after refining is completed, slag fishing and sampling are carried out, and finally discharging and casting are carried out. The problems that in the melting process of an intermediate frequency furnace, production efficiency is low, and production cost is increased are solved. By adopting the A furnace and B furnace smelting process, the daily production efficiency of rare earth zinc-aluminum alloy ingot products is improved, and production pauses caused by waiting for molten aluminum melting or molten zinc vaporization and the like are reduced.

The utility model belongs to the technical field of drain tanks, and particularly discloses a drain tank cooling device which comprises a drain tank, the top of the drain tank is respectively communicated with a circulating water outlet main pipe and a circulating water return main pipe through pipelines, the lower portion of the drain tank is connected with a deaerator through a pipeline, and a cooling assembly is arranged in the drain tank. The cooling assembly is used for cooling drain water in the drain tank. According to the utility model, the condenser pipe exchanges heat with high-temperature steam and drain water entering the drain tank, so that the high-temperature steam is condensed into water, the high-temperature steam entering the drain tank is prevented from vaporizing the drain water again, and the recycling rate of water resources is increased; the problem that the water seal of the drainage pump is heated by high-temperature steam to cause serious aging of the water seal can also be avoided; in addition, compared with a water supplementing device of a drain tank in the prior art, the condenser pipe is longitudinally arranged in the drain tank, drain water and high-temperature steam on the upper layer, the middle layer and the lower layer in the drain tank can be cooled, the cooling range is enlarged, and the cooling effect is improved.

A separation and recovery device for thiophene-containing BT oil includes a BT oil thiophene removal system, a first distillation column, and a second distillation column. The inlet of the BT oil thiophene removal system is connected to a BT oil source, and the outlet is fed to the first distillation column via a first pipeline. The outlet of the condenser at the top of the first distillation column forms a first benzene outlet, and a first reflux pipeline is provided connected to the reflux port of the first distillation column. The bottom of the first distillation column is fed to the second distillation column via a second pipeline. The top of the second distillation column is connected to the inlet of the reboiler heat exchange medium channel at the bottom of the first distillation column via a third pipeline. The outlet of the reboiler heat exchange medium channel at the bottom of the first distillation column forms a second benzene outlet, and a second reflux pipeline is provided connected to the reflux port of the second distillation column. This invention has a simple structure, is easy to operate, and can effectively separate and recover benzene and toluene from BT oil with high purity. It also effectively reduces the heat load of separating benzene and toluene, and can handle high-concentration thiophene petroleum benzene.

The application provides a fluorine pump starting method, a control device, a double-circulation refrigeration system and a computer readable storage medium, which can shorten the time required for starting the fluorine pump and improve the success rate of starting the fluorine pump. The fluorine pump starting method comprises the following steps: determining that the condition for starting the fluorine pump by the compressor is met; and starting the fluorine pump by the compressor. In the step of starting the fluorine pump by the compressor, the compressor is started first, then the fluorine pump is started, and the compressor is turned off after the fluorine pump is started.

The application provides an aluminum alloy water-cooled plate laser welding device and method, and relates to the technical field of laser welding.The aluminum alloy water-cooled plate laser welding device comprises a laser, a water-cooled plate laser head and a welding machine tool, the water-cooled plate laser head comprises a laser galvanometer and a multi-spot beam splitting assembly arranged in sequence along the laser transmission direction; wherein the laser galvanometer is used for realizing spiral swinging of the laser emitted by the laser; the multi-spot beam splitting assembly is used for splitting the laser into light spots; the welding machine tool is connected with the water-cooled plate laser head and is used for driving the water-cooled plate laser head to move; the action of the welding machine tool and the laser galvanometer makes a plurality of light spots on the aluminum alloy water-cooled plate form a welding pattern which simultaneously spirally swings. The aluminum alloy water-cooled plate laser welding device realizes multi-point simultaneous welding on the water-cooled plate plane, is beneficial to the overflow of pores, performs stirring welding through rotating light spots, reduces the stirring frequency, is stable in the process, can effectively inhibit the generation of pores and reduce the porosity of the welding bead.

The invention discloses a once-through boiler wet operation secondary air temperature increasing energy-saving system which comprises a water storage tank, the water storage tank is connected with an atmosphere type flash tank and a secondary air heater through pipelines, the atmosphere type flash tank is connected with a water collecting tank through a pipeline, and the water collecting tank is connected with a deaerator, a unit drainage groove and an air machine drainage groove through pipelines. The secondary air heater is sequentially connected with an air feeder, a silencer and an inlet filter screen. According to the once-through boiler wet operation secondary air temperature increasing energy-saving system, the problems that in the prior art, most boilers are not provided with boiler water circulating pumps, a large amount of working media and heat are discharged, and unit energy consumption is further increased are solved.

The utility model relates to the technical field of brake calipers, in particular to a high-strength brake caliper. According to the technical scheme, an oil return opening and an oil inlet are formed in a caliper body, a mounting groove is formed in one side of the caliper body, the mounting groove of the caliper body is communicated through a communication hole, a flow channel is formed in the oil inlet, the oil inlet is communicated with the oil return opening and the mounting groove through the flow channel, a mounting hole is formed in the caliper body, and the oil return opening is communicated with the mounting groove through the flow channel. The caliper body is provided with an end cover through the mounting hole, the end cover is provided with a sealing edge and a second sealing groove, and the end cover is in sealed butt joint with the mounting hole through the sealing edge and the second sealing groove. The caliper body is firstly provided with the mounting hole and then provided with the mounting groove, tight butt joint is achieved through the end cover sealing edge and the second sealing groove, and the sealing performance is improved. The oil inlet and return opening is communicated with the mounting groove through the flow channel, smooth hydraulic driving is guaranteed, braking heat attenuation is effectively restrained by matching with the design of the heat dissipation holes, and the reliability and the service life of the brake calipers are all-directionally improved.

The utility model provides a high-pressure low-temperature vertical multi-stage shield pump using a medium as cooling water of a motor jacket. The high-pressure low-temperature vertical multi-stage shield pump comprises a pump head unit, a shield motor unit and a shaft penetrating through the pump head unit and the shield motor unit, a circulating hole communicated with the pump body outlet and the motor cooling cavity is formed in the motor shell front flange, and the motor cooling cavity is communicated with the outlet; a circulating hole for communicating the outlet of the pump body with the chamber where the auxiliary impeller mechanism is located is formed in the connecting section, the chamber where the auxiliary impeller mechanism is located is communicated with the cooling gap of the shielding motor, and a circulating hole for communicating the cooling gap of the shielding motor with the outlet is formed in the rear bearing body. According to the shielding motor, on the premise that cooling water is not independently arranged, the motor power and temperature rise can meet user requirements, and operation is stable and reliable. The utility model is suitable for extreme working conditions that the flow lift is relatively large, the medium viscosity is relatively small, the medium temperature is extremely low, the medium vaporization pressure is particularly high, and the medium vaporization pressure curve is particularly obviously influenced by temperature change.

The utility model discloses a carbon dioxide supercharging device with a heating function, which comprises a soil layer, a working surface is arranged on the soil layer, a closed box body is arranged on the working surface, a multi-stage electric telescopic cylinder is arranged in the closed box body, a piston is arranged at the telescopic end of the multi-stage electric telescopic cylinder, and a heating device is arranged on the piston. A liquid inlet pipe is arranged on the closed box body, a first electromagnetic valve is arranged on the liquid inlet pipe, a first check valve is arranged on the liquid inlet pipe and located on one side of the first electromagnetic valve, a first pressure gauge is arranged on the liquid inlet pipe and located on the other side of the first electromagnetic valve, and a first heat tracing band is arranged on the liquid inlet pipe. The utility model relates to the technical field of oil well drilling, which can heat the closed box body and the conveying pipeline for storing carbon dioxide, prevent the closed box body and the conveying pipeline from being frozen and frosted due to vaporization of the carbon dioxide, prevent the closed box body and the conveying pipeline from being damaged, and further prolong the service life of equipment.