9results about How to "Resolve reflux" patented technology

This application relates to a peristaltic pump anti-backflow control method, comprising the following steps: obtaining the current flow rate and direction at the outlet of the pump assembly; controlling the pump assembly based on the current flow rate and direction, and the expected flow rate of the pump assembly in the current operating state; the peristaltic pump anti-backflow control method of this application determines whether liquid backflow occurs in the pump assembly by real-time detection of the liquid flow rate at the outlet of the pump assembly; when liquid backflow occurs in the pump assembly in the stopped state, the pump assembly can be controlled to deliver liquid to the outlet so that the extra delivered liquid can offset the backflow liquid; when liquid backflow occurs in the pump assembly in the running state, the liquid flow rate at the outlet of the pump assembly can be adjusted by adjusting the pump assembly speed, so that the actual flow rate at the outlet of the pump assembly matches the preset value, achieving the expected outlet flow rate, thereby solving the liquid backflow problem of the pump assembly in the running state.

This utility model discloses a portable electrotherapy device, applied in the field of medical device technology, including a housing (1), a negative pressure pump (3) installed in the housing (1), a gas tank (5) connected to the negative pressure pump (3) via a first interface, a three-way device (8) connected to the second interface of the gas tank (5) via a first port, an electrotherapy socket (6) connected to the second port of the three-way device (8) for connecting an adsorption component, and a water collection tank (7) connected to the third port of the three-way device (8). The water collection tank (7) has a drain outlet, and the third port is located below the first and second ports. It also includes a one-way valve (11) connected between the third port of the three-way device (8) and the inlet of the water collection tank (7) to prevent the backflow of liquid in the water collection tank (7). This solves the problems of water entering the gas tank and poor negative pressure adsorption effect in existing electrotherapy devices in terms of electrode fixing methods.

The utility model discloses a strip material removing mechanism and a flexible line assembling and discharging work station, and relates to the technical field of product assembling. The strip material removing mechanism comprises a tool uncovering and carrying assembly capable of moving to the position above an equipment circulation tool; the tool uncovering carrying assembly comprises a tool uncovering clamping jaw used for clamping an upper cover plate of an equipment circulation tool and a first driving part used for driving the tool uncovering clamping jaw to be opened / closed. The tool uncovering and carrying assembly is provided with a static electricity removing assembly used for removing static electricity of the upper cover plate and a vibration assembly used for vibrating the upper cover plate so that products can be separated and fall off from jacking columns on the lower surface of the upper cover plate. The belt material removing mechanism further comprises a product carrying assembly which can move to the position above the equipment circulation tool and is used for carrying away the separated and disengaged products. The utility model can improve the productivity of a production line and reduce the reject ratio of products.

The utility model discloses a laboratory ventilation device of waste gas treatment structure, including installation base plate and the exhaust fan of installation base plate lower end dismounting setting, the lower end of exhaust fan is connected with filter cover, and through fan installation ring -shaped cylinder, installation positioning lock groove, thread positioning lock rod etc. Cooperation of structure makes exhaust fan and can be independently disassembled. The installation positioning block and sliding positioning groove form the guidance, and there is no deviation jamming in dismounting, and the locking nut and locking bolt double -fixed, ensure stable and convenient quick dismounting, can regularly clean exhaust fan blade dust. The utility model discloses the filter cover inside adopts three -level composite filter structure. Waste gas impurity filter screen board intercepts solid particle first, and activated carbon adsorption filter board adsorbs organic pollutant, and two -in -one chemical filter layer handles acidic gas and organic solvent pertinently, compares traditional single straight -line exhaust mode, realizes to the full -flow purification of laboratory complex waste gas, and the discharge meets relevant environmental protection standard.

This invention relates to the field of building engineering technology, specifically to a non-vibration pressure grouting construction method for tall steel-concrete composite columns. S1: Grouting holes are opened at the bottom of the steel-concrete column, and vent holes are opened at the top. S2: A grouting connection structure is installed, and a grouting connection pipe is welded at an acute angle to the column axis and extends into the column. A check valve is installed on the pipe, and reinforcing ribs are welded between the pipe and the column. S3: Pressure grouting is performed from the compacted concrete until it overflows from the vent holes. S4: After the concrete has settled naturally, secondary grouting is performed until it overflows from the vent holes again. S5: The check valve is closed to prevent backflow. S6: The grouting holes are sealed after the concrete reaches 70% of its design strength. This invention, through a grouting connection structure with a check valve and reinforcing ribs, combined with a secondary grouting process, systematically solves the problems of concrete backflow, insufficient compaction at the top of the column, and easy damage to the connection structure during the initial jacking process of ultra-high-rise buildings. It significantly improves construction quality, safety, and efficiency, and is applicable to the construction of tall steel-concrete composite columns in industrial and civil buildings.

The invention relates to the technical field of tunnel construction drainage, in particular to an inclined shaft tunnel relay type reverse slope drainage system which comprises an excavation water collection facility, water pumping and drainage equipment and a control system, the excavation water collection facility comprises a water collection ditch and a water collection pump pit, the water collection ditch is used for communicating water in a tunnel, and the water collection pump pit is connected with the water collection ditch; the water collecting pump pit is lower than the water collecting ditch; the water pumping and draining equipment comprises a submerged pump, a connecting pipeline, a buffer water tank and a booster pump, the submerged pump is located in the water collecting pump pit, the buffer water tank is located in the inclined shaft ramp, the submerged pump and the buffer water tank are connected through the connecting pipeline, the booster pump is located on the ground, and the buffer water tank and the booster pump are connected through the connecting pipeline; the control system comprises a drainage management unit, a filtering unit, a blocking unit, an early warning unit, an emergency unit and a console. The problems that in the prior art, an inclined shaft tunnel relay type reverse slope drainage system is low in intelligent degree and poor in collaboration, and backflow cannot be avoided are effectively solved.

The utility model relates to the field of ceramic filter, disclose a kind of ceramic membrane filter for waste rubber emulsion recovery, including protective shell 1, the water inlet 2 of the outside fixed connection of protective shell 1, the water outlet 11 of the outside fixed connection of protective shell 1, the top fixed connection of protective shell 1 has guard board one 3, the bottom fixed connection of protective shell 1 has guard board two 10, the outside fixed connection of guard board one 3 has motor 4, in the utility model, by motor and belt structure, drive support column two and support column one structure rotation, drive connecting shaft two, connecting shaft one structure rotation, make cleaning plate one and bristle rotation, to realize cleaning filter screen effect, after the water outlet in water end, under the cooperation of spring one, spring two and sliding plate structure, make that sliding ball works in water outlet structure, to solve the problem of water backflow after water outlet water end.

The utility model provides an oil supply pump belongs to gear pump technical field. It solved the existing oil supply pump easy backflow etc. technical problem. An oil supply pump, including fixed connection's pump cover, the cylindrical portion on the guide pulley seat, the pump cover and the cylindrical portion between the sleeve setting drive gear and passive gear, the outer tooth of drive gear and the inner tooth of passive gear mesh, the pump cover has the oil outlet chamber, the first oil outlet hole and the second oil outlet hole of interpenetration are provided on the guide pulley seat, the first oil outlet hole other end and the oil outlet chamber intercommunication, the side of guide pulley seat has the mounting hole, the other end of second oil outlet hole straight intercommunication to the mounting hole, the mounting hole is provided with the steel ball, the pump cover is provided with the buffer hole, and the buffer hole is connected with the junction of mounting hole and second oil outlet hole intercommunication, and the steel ball drops to block second oil outlet hole or rises to make second oil outlet hole and buffer hole intercommunication. The utility model solved the backflow problem, ensured the unidirectionality and stability of oil supply, improved the work efficiency of pump.

The utility model discloses a coke oven waste gas sampling device and relates to the technical field of waste gas sampling devices. The sampling device comprises an air bag, wherein an anti-leakage mechanism and a sampling mechanism are arranged on the air bag; supporting plates are fixedly connected to the top and the bottom of the air bag, a plurality of gaskets are fixedly connected to the sides, away from each other, of the two supporting plates, a round hole is formed in the supporting plate located on the upper portion, the anti-leakage mechanism comprises a transfer shell arranged on the top of the air bag in a communicating mode, and the top of the transfer shell penetrates through the round hole. The sampling mechanism comprises a plurality of telescopic rods which are fixedly connected between the two supporting plates. According to the coke oven waste gas sampling device disclosed by the utility model, the leakage-proof mechanism is arranged, so that the problem that the accuracy of a final detection result is influenced due to inconvenience in preventing sampled gas leakage, enabling outside air to enter the sampling device, diluting a waste gas sample and changing the proportion of each component in the waste gas in the use process of the existing coke oven waste gas sampling device is solved.