30results about How to "Constant liquid level" patented technology

The invention relates to a negative-pressure liquid nitrogen subcooler and a method for liquid nitrogen temperature reduction. The negative-pressure liquid nitrogen subcooler is applied to the field of motor vacuum science and technology and comprises a liquid nitrogen conveying system, a subcooler system, a negative-pressure air exhaust system and a discharge system. Wherein the liquid nitrogen conveying system is used for providing liquid nitrogen for the subcooler system, the negative-pressure air exhaust system is provided with an air temperature type vaporizer which is used for reducing the pressure of the subcooler, gas and nitrogen are discharged by the discharge system, in the subcooler system, a pneumatic control valve is adjusted manually in a long-distance manner, so that liquid level of the liquid nitrogen in the subcooler is kept constant. The method comprises the following steps that: firstly, the liquid nitrogen is filled into a liquid nitrogen container, pressure is adjusted, the liquid nitrogen is filled into the subcooler, and the liquid level of the liquid nitrogen in the subcooler is kept constant; then, the negative-pressure air exhaust system is started, and the liquid nitrogen is cooled through a heat exchanger; at last, the liquid nitrogen is recycled and residual liquid is discharged. In the negative-pressure liquid nitrogen subcooler, defect that a constant-pressure liquid nitrogen subcooler only can provide the liquid nitrogen with the minimum temperature of 77 DEG C can be overcome, heat sink temperature can be further reduced, adjustable heat sink temperature between 70 DEG C and 77 DEG C can be achieved, equipment is simple, effect is good and cost is low.

A device and method designed to provide a continuous supply of liquid to livestock is presented. The one-piece device comprises a storage tank and a drinking bowl. The storage tank can have a filling access hole for filling the tank. The tank can have at least one drinking bowl access hole which allows access from the tank to the bowl. Both the filling access hole and the drinking bowl access holes can be opened and closed. While filling, the drinking bowl access hole can be closed. After filling, the filling access hole can be closed and the drinking bowl access hole can be opened allowing liquid to flow from the tank into the bowl. Gravity and air pressure within the tank maintain a constant liquid level in the bowl while simultaneously preventing liquid from overflowing the bowl. A heating element can be placed into the tank to prevent freezing.

The invention belongs to the technical field of resin evaluation, and mainly relates to an evaluating method for resins in a phenol refining process. The evaluating method mainly relates to evaluation of adsorption performance of two resins. Firstly, the total ion-exchange capacity of each resin is measured, and then the adsorption performance of each of the resins is evaluated by utilization of static adsorption and dynamic adsorption methods. A method combining headspace solid-phase microextraction and gas chromatography is utilized for measuring impurity contents in phenol in the whole evaluating process. The evaluating method is simple in operation and comprehensive in applications, can be used for evaluation of all resins in industrial applications, and has a good using prospect in the field of fine chemicals.

The invention discloses a light-sensitive material supplying method and a DLP (Data Loss Prevention) principle-based 3D (three-dimensional) printer system, and belongs to the technical field of 3D printing. The liquid level height of a light-sensitive material in a controllable sample pool is constant. The volume Vi corresponding to each layer of model slice Ni is calculated and serves as the parameter for controlling the light-sensitive material added into the sample pool after finishing printing each layer of model slice Ni and before printing the next layer of model slice Ni+1, so that constant liquid level height of the light-sensitive material in the sample pool can be guaranteed when each layer of model slice is printed. The liquid depth of the light-sensitive material in the sample pool can also be guaranteed to be equal to the thickness h of the single layer of model slice during the process of printing each layer of model slice by further setting the liquid depth of the light-sensitive material in the sample pool to be consistent to the thickness h of the single layer of model slice, so that model printing precision can be greatly improved.

The invention provides a movable overflow type hydraulic brake saline water tank, which belongs to the field of generator experiment equipment and comprises a work tank, a water storage tank, an electrode plate and a busbar, wherein the electrode plate is positioned in the work tank, the busbar is connected with the electrode plate, the work tank is positioned above the water storage tank, the movable overflow type hydraulic brake saline water tank also comprises a water pump station and an overflow door, the overflow door consists of a door frame and a hydraulic door, the door frame is fixedat an opening part of the side surface of the work tank, the hydraulic door can move upwards and downwards along the door frame and can be fixed in any position of the door frame through a fixing element, the top end of the hydraulic door is provided with an overflow groove, the bottom of the overflow groove is provided with a pipeline communicated to the water storage tank, and the water pump station is respectively connected with the work tank and the water storage tank through pipelines. The overflow door and the water pump are adopted, water can be continuously circulated, the load can not be changed, a cooling effect is realized, the problem of load fluctuation caused by serious violent boiling is also solved, and the movable overflow type hydraulic brake saline water tank also has the advantages that the load does not need to be frequently regulated, and the carrying capability is great. The movable overflow type hydraulic brake saline water tank can be widely applied to large-scale generator tests.

The invention relates to a detection device of the molten steel liquid level in a belt spraying packet. The detection device comprises a floater 3, a floater rod 2, a liquid level detection mechanism 1 and a PLC system 5. The bottom of the floater rod 2 is installed on the floater 3, and the top of the floater rod 2 penetrates though a guide sleeve on the belt spraying packet 7; the floater 3 directly makes contact with molten steel 8 in the belt spraying packet 7 to drive the floater rod 2 to reflect the liquid level of the molten steel 8; the liquid level detection mechanism 1 is provided with an optical fiber sensor 4; the optical fiber sensor 4 is used for detecting displacement changes of the top of the floater rod 2 and feeds detection results back to the PLC system 5; the current liquid level of the molten steel 8 is worked out by the PLC system 5 according to the detection results. According to the detection device of the molten steel liquid level in the belt spraying packet, the height of the liquid level of the molten steel in the belt spraying packet can be accurately mastered, and accordingly steel can be continuously supplemented into the belt spraying packet in real time, the liquid level of the molten steel in the belt spraying packet can be kept constant and the quality of products can be further controlled.

The invention discloses an automatic microsphere production device, which comprises a burdening tank, a pill dropping device, a microsphere producing tank, a soaking tank and at least one drying tank, wherein a stirring tank is arranged in the burdening tank; the pill dropping device comprises a liquid storage tank; the bottom of the liquid storage tank is provided with an adjustable-flow dropping disk; the bottom of the burdening tank is communicated with the liquid storage tank through a pipeline; the microsphere producing tank is arranged below the liquid storage tank, and corresponds to the dropping disk; the top of the microsphere producing tank is provided with an opening; the bottom of the microsphere producing tank is communicated with the soaking tank through a pill outlet pipeline; and the soaking tank is communicated with the drying tank. Production equipment is provided for the production of biological pesticide microsphere particles, and the requirements of large scale and automation in agricultural production are met.

The invention belongs to the field of cleaning devices, and in particular relates to a wall-mounted ultrasonic cleaning device, which includes a body installed on the wall, an ultrasonic generator installed on the body, and a cleaning tank for holding washing liquid, and also includes a The liquid supply pipeline and the liquid discharge pipeline connected to the cleaning tank. When washing, the liquid supply pipeline supplies liquid to the cleaning tank, and at the same time, the liquid discharge pipeline discharges the liquid in the cleaning tank, so that the washing liquid in the cleaning tank keeps flowing and the liquid The bit height does not change. The invention belongs to the beneficial effect of the invention that by setting the liquid supply pipeline and the liquid discharge pipeline, the washing liquid in the cleaning tank can keep flowing and the liquid level remains unchanged, which can not only meet the needs of cleaning, but also make the washing device more efficient. It is more convenient to use, and the cleaning liquid can be replaced in time; by setting the regulating device, the liquid flow in the water supply pipeline and the drainage pipeline can be adjusted by the regulating device, so that the liquid level in the cleaning tank can be kept unchanged.

The invention provides a movable overflow type hydraulic brake saline water tank, which belongs to the field of generator experiment equipment and comprises a work tank, a water storage tank, an electrode plate and a busbar, wherein the electrode plate is positioned in the work tank, the busbar is connected with the electrode plate, the work tank is positioned above the water storage tank, the movable overflow type hydraulic brake saline water tank also comprises a water pump station and an overflow door, the overflow door consists of a door frame and a hydraulic door, the door frame is fixedat an opening part of the side surface of the work tank, the hydraulic door can move upwards and downwards along the door frame and can be fixed in any position of the door frame through a fixing element, the top end of the hydraulic door is provided with an overflow groove, the bottom of the overflow groove is provided with a pipeline communicated to the water storage tank, and the water pump station is respectively connected with the work tank and the water storage tank through pipelines. The overflow door and the water pump are adopted, water can be continuously circulated, the load can not be changed, a cooling effect is realized, the problem of load fluctuation caused by serious violent boiling is also solved, and the movable overflow type hydraulic brake saline water tank also has the advantages that the load does not need to be frequently regulated, and the carrying capability is great. The movable overflow type hydraulic brake saline water tank can be widely applied to large-scale generator tests.

The invention discloses a method to continual produce high-concentration sodium hypochlorite, which comprises: generating sodium hypochlorite solution, depositing for desalinization, and discharging salt. Wherein, the opposite device comprises a chloridization kettle inserted with two groups of inlet chlorine pipes, a group of subsiders in series, a salt mud tank, and a centrifuge. Wherein, the reaction kettle comprises a reaction area and a deposition area; forcing the qualified sodium hypochlorite supernatant into deposition slot through overflow port. This invention can keep the liquid level invariable and production continual, and has no pollution to environment.

The invention provides an unpowered automatic baffling type biogas generating device. A solar greenhouse and a biogas generating device arranged in the solar greenhouse are included; the biogas generating device includes a sewage collection sedimentation pond, a feeding chamber, a baffling biogas digester, a biogas slurry temporary storage tank and a solid-liquid separation tank; the bottom of thebaffling biogas digester is connected to a biogas slurry discharging pipeline; the top end of the biogas slurry discharging pipeline is flush with the top of the sewage collection sedimentation pond;the baffling biogas digester includes a concrete pool, a black film and a sunlight board, wherein the black film and the sunlight board cover the top of the concrete pool; multiple baffle plates fitting with the two sides of the concrete pool are arranged in the concrete pool; the multiple baffle plates divide the concrete pool into multiple baffling chambers, and water valves are arranged at thebottoms of two adjacent baffling chambers; and the top of the concrete pool is provided with a biogas output pipe. The unpowered automatic baffling type biogas generating device is convenient in maintenance and can make biogas production performance very stable.

The invention discloses a light-sensitive material supplying method and a DLP (Data Loss Prevention) principle-based 3D (three-dimensional) printer system, and belongs to the technical field of 3D printing. The liquid level height of a light-sensitive material in a controllable sample pool is constant. The volume Vi corresponding to each layer of model slice Ni is calculated and serves as the parameter for controlling the light-sensitive material added into the sample pool after finishing printing each layer of model slice Ni and before printing the next layer of model slice Ni+1, so that constant liquid level height of the light-sensitive material in the sample pool can be guaranteed when each layer of model slice is printed. The liquid depth of the light-sensitive material in the sample pool can also be guaranteed to be equal to the thickness h of the single layer of model slice during the process of printing each layer of model slice by further setting the liquid depth of the light-sensitive material in the sample pool to be consistent to the thickness h of the single layer of model slice, so that model printing precision can be greatly improved.

The invention relates to the coating technology, in particular to equipment convenient for coating of bottoms of printed circuit boards and a method thereof. The equipment comprises a washing claw system, a horizontal flowing type coating system, a hot air circulating system, a preheating sealing system and a cooling system, all of which are connected to a double-guide rail transmission system in sequence. An air extraction system is arranged above the horizontal flowing type coating system. The horizontal flowing type coating system comprises an incoming board connecting mechanism, a photoelectric sensor, a PLC, a glue barrel and a horizontal flowing wave nozzle valve, wherein the incoming board connecting mechanism is connected with the double-guide rail transmission system; the photoelectric sensor is arranged on the incoming board connecting mechanism; the PLC is connected with the photoelectric sensor and the horizontal flowing wave nozzle valve; and the horizontal flowing wave nozzle valve is connected to the glue barrel through a pipe. The invention further includes a coating method realized based on the equipment. The equipment has the advantages of simple production process, convenience for operation, safety and reliability, low investment cost, high product yield and high production efficiency, and can coat the printed circuit boards of different types in the electronic industry.

The invention provides a brake fluid replacing device. The brake fluid replacing device comprises a piston cylinder body, a piston assembly, a one-way valve assembly, a communicating pipe assembly, a brake fluid barrel, a waste liquid barrel and an idler wheel, wherein the piston cylinder body uses the one-way valve assembly and the communicating pipe assembly through a piston, sucks new hydraulic drive fluid in the brake fluid barrel, and pushes the new hydraulic drive fluid into a brake fluid storage pot of a car, and simultaneously, the piston cylinder body achieves replacement of waste brake fluid by sucking the waste brake fluid in a car brake wheel cylinder through the piston and pushing the waste brake fluid into the waste liquid barrel. The brake fluid barrel and the waste liquid barrel are fixedly installed at the upper end of the piston cylinder body through supports, and the idler wheel is fixedly installed below the piston cylinder body. A working method of the brake fluid replacing device is a negative pressure suction method. The brake fluid replacing device is simple in structure and low in cost, effectively guarantees that no air enters into a brake pipeline system during the brake fluid replacing process, and therefore can not reduce brake performance of the car, facilitates judging whether a brake pipeline leaks or not, is convenient to replace and operate, and saves manpower and material resources.

The invention discloses an engine carburetor liquid level height regulating device. The engine carburetor liquid level height regulating device comprises an oil storage cup, a lifting mechanism, a displacement sensor, a liquid level sensor, a control device and an oil storage cup support, wherein one side of the lifting mechanism is movably connected with the oil storage cup support, the other side of the lifting mechanism is fixedly connected with a gasoline octane value measuring machine body, the displacement sensor and the liquid level sensor are connected to the oil storage cup support and the oil storage cup, and the control device controls the movement of the lifting mechanism relative to a carburetor and measures the liquid level height of the oil surface of the oil storage cup in real time according to signals input by the displacement sensor and the liquid level sensor. Compared with the prior art, the device has the advantages that the liquid level height of the carburetor is regulated through the displacement sensor and the liquid level sensor, so that the problem of testing lag is effectively controlled, and reliability and sensitivity of a system are improved. In addition, the device is suitable for the technical field of gasoline octane value measurement.

The invention relates to a device and method for growing silicon carbide crystals by a liquid phase method. The device includes: a crucible for containing the Si alloy auxiliary solution and a seed rod for fixing the silicon carbide seed crystal; the device also includes a liquid level maintaining device, which includes a liquid level maintaining ring and The driving device used to push the liquid level to keep the ring down to the Si alloy auxiliary solution. The method is as follows: melting the growth raw material containing Si and metal elemental substance into a Si alloy co-solution; lowering the silicon carbide seed crystal and contacting the co-solution phase to grow the silicon carbide crystal; during the growth process of the silicon carbide crystal, The liquid level maintenance ring is pushed down by the pushing device into the Si alloy auxiliary solution to keep the liquid level of the Si alloy auxiliary solution constant. The invention can keep the height of the liquid level constant and the temperature field constant during the growth process of the silicon carbide crystal, can also maintain the stability of the auxiliary solution components and increase the thickness of the generated silicon carbide crystal.

The invention provides a negative-pressure liquid nitrogen subcooler and a method therefore for reducing liquid nitrogen temperature. The negative-pressure liquid nitrogen subcooler comprises a liquid nitrogen conveying system, a subcooler system, a negative-pressure air exhausting system and a discharging system, wherein the liquid nitrogen conveying system is used for supplying liquid nitrogen to the subcooler system; the negative-pressure air exhausting system is used for reducing pressure for the subcooler; and the discharging system is used for discharging gasified nitrogen. In the negative-pressure liquid nitrogen subcooler, an electric heater is adopted to raise the temperature of gaseous nitrogen to 20-30 DEG C, so that the subcooler is not limited to the weathers; a liquid level sensor is adopted to automatically regulating the opening of a pneumatic regulating valve, so that the height of the liquid level is maintained. The method comprises the steps of: firstly, injecting the liquid nitrogen for a liquid nitrogen container and regulating pressure; then injecting the liquid nitrogen for the subcooler, wherein the height of the liquid level of the liquid nitrogen in the subcooler is kept constant; then starting the negative-pressure air exhausting system, and cooling the liquid nitrogen through a heat exchanger; and finally, recovering the liquid nitrogen and discharging the liquid nitrogen. According to the invention, the temperature of a heat sink can be further reduced, the temperature of the heat sink is regulatable within a range of 70-77k, and the advantages of simple equipment, good effect and low operating cost are achieved.

The invention relates to a sample pretreatment system of a magnetic mechanical oxygen analyzer. The system comprises a washing tank and a waste liquid discharge pipeline, wherein the washing tank is provided with a liquid feed pipe connected with a sample pipeline and a washing water pipeline and a liquid discharge pipe for discharging washed waste liquid; the liquid discharge pipe is connected with the waste liquid discharge pipeline through a U-shaped pipe; and the waste liquid discharge pipeline is connected with a closed waste liquid collection system. The sample pretreatment system is characterized in that the liquid discharge pipe is provided with two outlets, wherein one of the two outlets is a liquid discharge port and the other one of the two outlets is an exhaust port; the liquid discharge port is connected with the waste liquid discharge pipeline; a gas-liquid separation tank is arranged between the waste liquid discharge pipeline and the waste liquid collection system; the mounting elevation of the gas-liquid separation tank is lower than that of an oxygen analyzer; the gas outlet of the gas-liquid separation tank is communicated with the atmosphere through a gas pipeline; the liquid outlet of the gas-separation tank is connected with the waste liquid collection system; and the exhaust port is connected with the gas pipeline through an exhaust pipe. The sample pretreatment system provided by the invention can ensure stable operation of an analysis unit of the oxygen analyzer.

The invention relates to a negative-pressure liquid nitrogen subcooler and a method for liquid nitrogen temperature reduction. The negative-pressure liquid nitrogen subcooler is applied to the field of motor vacuum science and technology and comprises a liquid nitrogen conveying system, a subcooler system, a negative-pressure air exhaust system and a discharge system. Wherein the liquid nitrogen conveying system is used for providing liquid nitrogen for the subcooler system, the negative-pressure air exhaust system is provided with an air temperature type vaporizer which is used for reducing the pressure of the subcooler, gas and nitrogen are discharged by the discharge system, in the subcooler system, a pneumatic control valve is adjusted manually in a long-distance manner, so that liquid level of the liquid nitrogen in the subcooler is kept constant. The method comprises the following steps that: firstly, the liquid nitrogen is filled into a liquid nitrogen container, pressure is adjusted, the liquid nitrogen is filled into the subcooler, and the liquid level of the liquid nitrogen in the subcooler is kept constant; then, the negative-pressure air exhaust system is started, and the liquid nitrogen is cooled through a heat exchanger; at last, the liquid nitrogen is recycled and residual liquid is discharged. In the negative-pressure liquid nitrogen subcooler, defect that a constant-pressure liquid nitrogen subcooler only can provide the liquid nitrogen with the minimum temperature of 77 DEG C can be overcome, heat sink temperature can be further reduced, adjustable heat sink temperature between 70 DEG C and 77 DEG C can be achieved, equipment is simple, effect is good and cost is low.

The present disclosure relates to a constant liquid level gasification furnace with a waste boiler comprising: a housing; an upper portion of the housing is defined as a gasification section, a middle portion of the housing is defined as a radiant section, and a lower portion of the housing is defined as a quenching section. The gasification section internally includes a membrane type water-cooled wall, wherein the inner region defined by the membrane type water-cooled wall is a gasification chamber. The radiant section internally includes a built-in radiant waste boiler assembly, wherein the internal region defined by the built-in radiant waste boiler assembly is a radiant chamber. The region defined by the quenching section is a quenching chamber.